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Sample records for sono kenma tokusei

  1. Sono-catalytic degradation of organic compounds

    International Nuclear Information System (INIS)

    Navarro, N.

    2012-01-01

    Unlike aqueous effluents from the PUREX process, aqueous effluents from advanced separation processes developed to separate the minor actinides (Am, Cm) contain organic reagents in large amounts. To minimize the impact of these organic compounds on the next steps of the process, and to respect standard discharges, it is necessary to develop new techniques of degradation of organic compounds. Sono-chemistry appears as a very promising solution to eliminate organic species in aqueous nuclear effluents. Indeed, the propagation of an ultrasonic wave in a liquid medium induces the appearance of cavitation bubbles which will quickly grow and implode, causing local conditions and extreme temperatures and pressures. Each cavitation bubble can then be considered as a microreactor at high temperature and high pressure able to destroy organic molecules without the addition of specific reagents. The first studies on the effect of ultrasonic frequency on sono-luminescence and sono-lysis of formic acid have shown that the degradation of formic acid occurs at the bubble/liquid interface. The most striking difference between low-frequency and high-frequency ultrasound is that the sono-lysis of HCOOH at high ultrasonic frequencies initiates secondary reactions not observed at 20 kHz. However, despite a much higher sono-chemical activity at high frequency, highly concentrated carboxylic acids in the aqueous effluents from advanced separation processes cannot be destroyed by ultrasound alone. To increase the efficiency of sono-chemical reactions, the addition of supported platinum catalysts has been studied. In these conditions, an increase of the kinetics of destruction of carboxylic acids such as oxalic acid is observed. (author) [fr

  2. Modeling of SONOS Memory Cell Erase Cycle

    Science.gov (United States)

    Phillips, Thomas A.; MacLeod, Todd C.; Ho, Fat H.

    2011-01-01

    Utilization of Silicon-Oxide-Nitride-Oxide-Silicon (SONOS) nonvolatile semiconductor memories as a flash memory has many advantages. These electrically erasable programmable read-only memories (EEPROMs) utilize low programming voltages, have a high erase/write cycle lifetime, are radiation hardened, and are compatible with high-density scaled CMOS for low power, portable electronics. In this paper, the SONOS memory cell erase cycle was investigated using a nonquasi-static (NQS) MOSFET model. Comparisons were made between the model predictions and experimental data.

  3. Biophysical Evaluation of SonoSteam®:

    DEFF Research Database (Denmark)

    Andersen, Ann Zahle; Duelund, Lars; Brewer, Jonathan R.

    and safety evaluations. Our results show that there are no contradictions between data obtained by either approach. However, the biophysical methods draw a much more nuanced picture of the effects and efficiency of the investigated decontamination method, revealing e.g. an exponential dose/response...... relationship between SonoSteam treatment time and changes in collagen I, and a depth dependency in bacterial reduction, which points toward CFU counts overestimating total bacterial reduction. In conclusion the biophysical methods provide a less biased, reproducible and highly detailed system description...

  4. Qualidade do sono em pacientes fibromiálgicos

    Directory of Open Access Journals (Sweden)

    Florinda Freire Moro

    2014-03-01

    Full Text Available Objetivo: Analisar a qualidade do sono em paciente fibromiálgicos, identificando seus principais hábitos noturnos e verificando os possíveis fatores que influenciam na qualidade do sono. Métodos: Pesquisa observacional, transversal, de caráter quantitativo, realizada em ambulatório de fisioterapia no período março a abril de 2012. Participaram 24 pacientes fibromiálgicos, independente do sexo e idade. Aplicou-se um questionário baseado no Pittsburgh Sleep Quality Index (PSQI para avaliar a qualidade e hábitos noturnos. As informações foram analisadas através de estatística descritiva. Resultados: Em relação à latência do sono, apenas 1 (4,2% leva para dormir um tempo menor ou igual a 15 min e 19 (79,2% apontaram dificuldade de “não adormecer em até 30 min” por mais de 3 vezes por semana. O componente “sentir dor” e o “acordar no meio da noite” tiveram maiores influências no distúrbio do sono destes pacientes. Quanto à duração do sono, 7 (29,2% dormem menos que 5 horas. Sobre a eficiência do sono, 12 (50,0% possuíam uma eficiência do sono superior a 85%, 10 (41,7% possuíam eficiência do sono entre 75-84% e apenas 2 (8,33% eficiência de 65-74%. Quanto ao uso de medicação para dormir, 12 (50% não usaram durante o mês e 12 (50% usavam entre 3 ou mais vezes durante a semana. Conclusão: Os pacientes com fibromialgia no presente estudo apresentaram um declínio na qualidade e eficiência do sono, sendo influenciados pela latência e duração do sono, presença de dor e despertar noturno. doi: 10.5020/18061230.2014.p72

  5. Qualidade do sono em pacientes fibromiálgicos

    Directory of Open Access Journals (Sweden)

    Florinda Freire Moro

    2014-03-01

    Full Text Available Objetivo: Analisar a qualidade do sono em paciente fibromiálgicos, identificando seus principais hábitos noturnos e verificando os possíveis fatores que influenciam na qualidade do sono. Métodos: Pesquisa observacional, transversal, de caráter quantitativo, realizada em ambulatório de fisioterapia no período março a abril de 2012. Participaram 24 pacientes fibromiálgicos, independente do sexo e idade. Aplicou-se um questionário baseado no Pittsburgh Sleep Quality Index (PSQI para avaliar a qualidade e hábitos noturnos. As informações foram analisadas através de estatística descritiva. Resultados: Em relação à latência do sono, apenas 1 (4,2% leva para dormir um tempo menor ou igual a 15 min e 19 (79,2% apontaram dificuldade de “não adormecer em até 30 min” por mais de 3 vezes por semana. O componente “sentir dor” e o “acordar no meio da noite” tiveram maiores influências no distúrbio do sono destes pacientes. Quanto à duração do sono, 7 (29,2% dormem menos que 5 horas. Sobre a eficiência do sono, 12 (50,0% possuíam uma eficiência do sono superior a 85%, 10 (41,7% possuíam eficiência do sono entre 75-84% e apenas 2 (8,33% eficiência de 65-74%. Quanto ao uso de medicação para dormir, 12 (50% não usaram durante o mês e 12 (50% usavam entre 3 ou mais vezes durante a semana. Conclusão: Os pacientes com fibromialgia no presente estudo apresentaram um declínio na qualidade e eficiência do sono, sendo influenciados pela latência e duração do sono, presença de dor e despertar noturno.

  6. QUALIDADE DO SONO, CRONOTIPO E DESEMPENHO EM CORREDORES DE RUA

    Directory of Open Access Journals (Sweden)

    Igor Cruz

    Full Text Available RESUMO Introdução: O exercício físico gera resultados positivos para a qualidade do sono e atua no ciclo sono-vigília por meio de seu efeito sincronizador indireto do relógio biológico. Objetivo: Avaliar a qualidade de sono, o cronotipo e o desempenho de corredores amadores de rua da cidade de Limeira. Métodos: Foram avaliados 42 indivíduos de ambos os sexos (28 ± 1,47 anos, que praticavam corrida de rua. O instrumento utilizado para aplicação dos questionários foi a plataforma Google Drive - Google Forms. Foram formuladas questões que englobam o cotidiano de um corredor de rua e também questionários para avaliação do cronotipo, sonolência e qualidade do sono. Resultados: Os resultados demonstraram que o cronotipo mais frequente foi o matutino (47,61%, seguido por intermediário (30,95% e vespertino (21,42%. A frequência de corridas foi 88% no período da manhã, 9% no período da noite e 4% período da tarde. Com relação à qualidade de sono geral foi verificado que 59% dos corredores tinham má qualidade de sono. Ao analisar as variáveis de sono e sonolência em decorrência do horário da última corrida realizada, verificou-se que as pessoas que correram no período da tarde tiveram pior qualidade do sono e os que correram à noite tiveram índices de sonolência. Não se encontrou diferença no desempenho das corridas de 5 km entre matutinos e vespertinos; no entanto, constatou-se fraca associação entre o tempo da última corrida e a pontuação do cronotipo, demonstrando que os matutinos realizavam as provas em menor tempo. Conclusão: Assim, podemos sugerir que o cronotipo e o padrão de sono podem interferir no desempenho e, dessa forma, devem ser levados em conta durante os treinamentos.

  7. Qualidade do sono entre professores e fatores associados

    OpenAIRE

    Denise Andrade Pereira Meier

    2016-01-01

    O sono desempenha função notável na prevenção de doenças, manutenção e recuperação da saúde física e mental. Como processo reparador, sofre influências de fatores determinantes e condicionantes, que o tornam complexo e multifacetado. As condições adversas de trabalho enfrentadas por professores podem prejudicar sua qualidade de vida e, consequentemente, seu padrão de sono. Este estudo objetivou analisar a qualidade do sono e fatores associados em professores da educação básica. Trata-se de um...

  8. Learning model of eye movement system based on anatomical structure; Kaibogakuteki kozo ni motozuita gakushu kino wo motsu gankyu undo system to sono tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, X.; Wakamatsu, H. [Tokyo Medical and Dental University, Tokyo (Japan)

    1998-07-01

    A learning system is proposed to explain the adaptive function of an eye movement consisting of compensatory and optokinetic reflex, and pursuit movements based on the brain anatomy and physiology. Thereby, the learning system is synthesized as an artificial neural network based on the structure and function of the biological neural network of flocculus. The role of neural paths into flocculus from stretch receptors of ocular muscles are discussed in detail from the viewpoint of system control engineering. The mathematical learning process is also shown taking into account the adaptive mechanism and the anatomical structure of vestibular nuclei. The experimental results through simulation confirm the validity of the hypothesis and the appropriateness of the inference process in connection with the proposed mathematical model. 18 refs., 11 figs.

  9. Síndrome de apneia-hipopneia obstrutiva do sono

    OpenAIRE

    Carvalho, Vanessa Mafalda Araújo

    2008-01-01

    A Síndrome de Apneia/Hipopneia Obstrutiva do Sono apresenta actualmente uma elevada prevalência entre a população adulta, assim como diversas complicações inerentes a esta que aumentam a morbilidade e mortalidade dos pacientes que padecem desta patologia. Esta síndrome caracteriza-se pelo repetido estreitamento ou colapso das vias aéreas superiores durante o sono. A obstrução é causada pelo colapso do palato mole e/ou da base da língua contra as paredes faríngeas devido à diminuição do tónus ...

  10. Qualidade do sono e tolerância ao esforço em portadores de apneia obstrutiva do sono

    Directory of Open Access Journals (Sweden)

    Aliny Priscilla do Nascimento

    2014-04-01

    Full Text Available INTRODUÇÃO: O sono é um estado natural e recorrente, no qual acontecem processos neurobiológicos importantes. A má qualidade do sono está diretamente associada com piores indicadores de saúde. A qualidade do sono pode ser medida objetiva e subjetivamente por métodos como a polissonografia, que é o padrão de referência, ou por meio de testes e questionários, como o índice de qualidade de sono de Pittsburgh (IQSP. OBJETIVO: Correlacionar a qualidade do sono com a tolerância ao esforço em pacientes portadores da síndrome da apneia/hipopneia obstrutiva do sono (SAHOS. MÉTODOS: Participaram do estudo 63 indivíduos (57 mulheres e seis homens, média de idade de 51,7 ± 6,6 anos; índice de massa corpórea (IMC média de 28,2 ± 5,0 kg/m2; índice de apneia/hipopneia (IAH médio de 7,3 ± 10,50 eventos/hora, verificado através da polissonografia. Para a avaliação da qualidade do sono, os participantes responderam ao IQSP, e para a avaliação da tolerância ao esforço, realizaram o teste de caminhada de 6 minutos (TC6M. RESULTADOS: Não houve correlação entre o IQSP e o TC6M (Rs = -0,103620, p = 0,419, assim como entre o IAH e o TC6M (Rs = -0, 000984, p = 0,9939. Podemos sugerir que a qualidade do sono e a gravidade da SAHOS não afetam a tolerância ao esforço dos indivíduos com SAHOS. CONCLUSÃO: Estudos com uma amostra maior, levando-se em consideração a estratificação pela gravidade da SAHOS e utilizando métodos mais acurados de avaliação da capacidade funcional, devem ser realizados, a fim de que resultados mais abrangentes possam ser obtidos.

  11. Fatores que interferem na qualidade do sono de pacientes internados

    Directory of Open Access Journals (Sweden)

    Shíntia Viana da Costa

    2013-02-01

    Full Text Available Este estudo objetivou identificar fatores que interferem na qualidade do sono de pacientes internados em hospital universitário do interior de São Paulo. Trata-se de estudo exploratório, de corte transversal, com amostragem não probabilística. Participaram 117 pacientes (59% homens, idade média de 48 anos, desvio padrão 16,9 internados há pelo menos 72 horas, em condições clínicas estáveis. Os instrumentos utilizados foram: questionário de identificação e Fatores Intervenientes na Qualidade do Sono (FIQS. O tratamento dos dados foi feito com estatística descritiva e cada item do FIQS foi submetido a teste e reteste. Os fatores apontados com maior frequência foram: acordar cedo (55,6%, sono interrompido (52,1%, iluminação excessiva (34,2%, recebimento de cuidados pela equipe de enfermagem (33,3% e distúrbios orgânicos como dor e fadiga (26,5%. Sugere-se que os enfermeiros planejem intervenções buscando modificar fatores que propiciam ruídos e iluminação intensos à noite, visando reduzir interrupções e, consequentemente, a privação de sono.

  12. Comparison of Fenton and sono-Fenton bisphenol A degradation

    International Nuclear Information System (INIS)

    Ioan, Iordache; Wilson, Steven; Lundanes, Elsa; Neculai, Aelenei

    2007-01-01

    Degradation of bisphenol A (BPA) was carried out with the Fenton reagent with and without additional sonochemical treatment. The Fenton and the sono-Fenton decomposition of BPA showed that ultrasound irradiation of wastewater improved the wet oxidation process of 25 mg l -1 BPA solutions. The sonochemical degradation of BPA was monitored using UV absorption and large volume injection packed capillary LC measurements

  13. Violência durante o sono Violent behavior during sleep

    Directory of Open Access Journals (Sweden)

    Dalva Poyares

    2005-05-01

    Full Text Available Casos de comportamento violento (CV durante o sono são relatados na literatura. A incidência de comportamento violento durante o sono não é muito conhecida. Um estudo epidemiológico mostra que cerca de 2% da população geral apresentava comportamento violento dormindo e eram predominantemente homens. Neste artigo, os autores descrevem aspectos clínicos e médico-legais envolvidos na investigação do comportamento violento. O comportamento violento se refere a ferimentos auto-infligidos ou infligidos a um terceiro durante o sono. Ocorre, muito freqüentemente, seguindo um despertar parcial no contexto de um transtorno de despertar (parassonias. Os transtornos do sono predominantes diagnosticados são: transtorno de comportamento REM e sonambulismo. O comportamento violento poderia ser precipitado pelo estresse, uso de álcool e drogas, privação do sono ou febre.Cases of violent behavior during sleep have been reported in the literature. However, the incidence of violent behavior during sleep is not known. One epidemiological study showed that approximately 2% of the general population, predominantly males, presented violent behavior while asleep. In the present study, the authors describe clinical and medico-legal aspects involved in violent behavior investigation. Violent behavior refers to self-injury or injury to another during sleep. It happens most frequently following partial awakening in the context of arousal disorders (parasomnias. The most frequently diagnosed sleep disorders are REM behavior disorder and somnambulism. Violent behavior might be precipitated by stress, use of alcohol or drugs, sleep deprivation or fever.

  14. Sono-chemiluminescence from a single cavitation bubble in water

    International Nuclear Information System (INIS)

    Brotchie, Adam; Shchukin, Dmitry; Moehwald, Helmuth; Schneider, Julia; Pflieger, Rachel

    2012-01-01

    In summary, this study has revealed the conditions required for a single bubble to be sono-chemically active. Evidence of radical-induced processes surrounding the bubble was only observed below the SL threshold, where the bubble was not spatially stable, and did not correlate with emission from excited molecular states inside the bubble. Moreover, this work substantiates recent progress that has been made in bridging the gap between single and multi-bubble cavitation. (authors)

  15. SONOS memories with embedded silicon nanocrystals in nitride

    International Nuclear Information System (INIS)

    Liu, Mei-Chun; Chiang, Tsung-Yu; Chao, Tien-Sheng; Kuo, Po-Yi; Lei, Tan-Fu; Chou, Ming-Hong; Wu, Yi-Hong; Cheng, Ching-Hwa; Liu, Sheng-Hsien; Yang, Wen-Luh; You, Hsin-Chiang

    2008-01-01

    We have successfully demonstrated SONOS memories with embedded Si-NCs in silicon nitride. This new structure exhibits excellent characteristics in terms of larger memory windows and longer retention time compared to control devices. Using the same thickness 2.5 nm of the bottom tunneling oxide, we found that N 2 O is better than O 2 oxide. Retention property is improved when the thickness of N 2 O is increased to 3.0 nm

  16. Identificação de hábitos de sono, compreensão do sono e rotinas de sono em crianças de idade escolar : estudo com crianças e pais

    OpenAIRE

    Guimarães, Ana Cristina

    2013-01-01

    Tese de mestrado, Psicologia (Secção de Psicologia Clínica da Saúde - Núcleo de Psicologia Clínica da Saúde e da Doença), Universidade de Lisboa, Faculdade de Psicologia, 2013 O sono é um fenómeno universal de grande importância para o desenvolvimento infantil. A qualidade do sono é determinada por vários factores, entre eles as rotinas de sono. É assim importante estudar as rotinas de forma a aumentar o conhecimento sobre este determinante. Apesar da criança ter um papel importan...

  17. Perfil cardiovascular em pacientes com apneia obstrutiva do sono

    Directory of Open Access Journals (Sweden)

    Fátima Dumas Cintra

    2011-04-01

    Full Text Available FUNDAMENTO: Apneia Obstrutiva do Sono (AOS é um fator de risco para várias condições cardiovasculares incluindo aumento na mortalidade cardiovascular. Sendo assim, é essencial o conhecimento das principais repercussões cardiovasculares dos distúrbios respiratórios do sono durante uma avaliação clínica. OBJETIVO: Analisar as características cardiovasculares de pacientes com AOS. MÉTODOS: Pacientes submetidos a polissonografia basal foram consecutivamente selecionados do banco de dados do Instituto do Sono entre março de 2007 e março de 2009. Todos os pacientes foram orientados a comparecer ao ambulatório para coleta de sangue, exame físico, eletrocardiograma de 12 derivações, espirometria, teste cardiopulmonar em esteira ergométrica e ecocardiograma transtorácico. O estudo foi aprovado pelo comitê de ética e pesquisa e registrado no site http://clinicaltrials.gov/ sob o número: NCT00768625. RESULTADOS: Foram analisados 261 pacientes e 108 controles. As principais características dos pacientes com AOS foram: obesidade, hipertensão, baixos níveis plasmáticos de lipoproteínas de alta densidade (HDL e aumento no diâmetro do átrio esquerdo quando comparados com controles (3,75 ± 0,42; 3,61 ± 0,41, p = 0,001, respectivamente. Essas características associadas correspondem a um acréscimo de 16,6 vezes na probabilidade de ocorrência de AOS independentemente do relato de algum sintoma dessa desordem, como sonolência ou ronco. CONCLUSÃO: Na amostra avaliada, o perfil cardiovascular dos pacientes com AOS mais encontrado foi: obesidade, hipertensão arterial, baixos níveis plasmáticos de HDL e átrio esquerdo com diâmetro aumentado.

  18. Effects of tunnel oxide process on SONOS flash memory characteristics

    International Nuclear Information System (INIS)

    Li, Dong Hua; Park, Il Han; Yun, Jang-Gn; Park, Byung-Gook

    2010-01-01

    In this paper, various process conditions of tunnel oxides are applied in SONOS flash memory to investigate their effects on charge transport during the program/erase operations. We focus the key point of analysis on Fermi-level (E F ) variation at the interface of silicon substrate and tunnel oxide. The Si-O chemical bonding information which describes the interface oxidation states at the Si/SiO 2 is obtained by the core-level X-ray photoelectron spectroscopy (XPS). Moreover, relative E F position is determined by measuring the Si 2p energy shift from XPS spectrums. Experimental results from memory characteristic measurement show that MTO tunnel oxide structure exhibits faster erase speed, and larger memory window during P/E cycle compared to FTO and RTO tunnel oxide structures. Finally, we examine long-term charge retention characteristic and find that the memory windows of all the capacitors remain wider than 2 V after 10 5 s.

  19. Padrões de sono de estudantes ingressantes na Graduação em Enfermagem

    OpenAIRE

    Furlani, Renata; Ceolim, Maria Filomena

    2005-01-01

    Trata-se de estudo exploratório e descritivo com o objetivo de identificar os padrões de sono de estudantes ingressantes na graduação. Desenvolvido na Universidade Estadual de Campinas SP, os dados foram coletados em dois momentos distintos por meio do Índice de Qualidade de Sono de Pittsburgh. Durante as férias, os estudantes apresentaram melhor qualidade/ duração de sono e adoção de horários mais condizentes com seu cronotipo. Após o início das aulas, maior número apresentou sono de má qual...

  20. Effect of ultrasonic frequency on the mechanism of formic acid sono-lysis

    International Nuclear Information System (INIS)

    Chave, T.; Nikitenko, S.I.; Navarro, N.M.; Pochon, P.; Bisel, I.

    2011-01-01

    The kinetics and mechanism of formic acid sono-chemical degradation were studied at ultrasonic frequencies of 20, 200, and 607 kHz under argon atmosphere. Total yield of HCOOH sono-chemical degradation increases approximately 6-8-fold when the frequency increased from 20 to 200 or to 607 kHz. At low ultrasonic frequencies, HCOOH degradation has been attributed to oxidation with OH . radicals from water sono-lysis and to the HCOOH decarboxylation occurring at the cavitation bubble-liquid interface. With high-frequency ultrasound, the sono-chemical reaction is also influenced by HCOOH dehydration. Whatever the ultrasonic frequency, the sono-lysis of HCOOH yielded H 2 and CO 2 in the gas phase as well as trace, amounts of oxalic acid and formaldehyde in the liquid phase. However, CO and CH 4 formations were only detected under high frequency ultrasound. The most striking difference between low frequency and high frequency ultrasound is that the sono-lysis of HCOOH at high ultrasonic frequencies initiates Fischer-Tropsch hydrogenation of carbon monoxide. (authors)

  1. Qualidade do sono em portadores do vírus da imunodeficiência humana

    Directory of Open Access Journals (Sweden)

    Luciana Tiemi Kuranishi Ferreira

    2012-08-01

    Full Text Available Este estudo teve por objetivo caracterizar a qualidade do sono de pessoas com o vírus da imunodeficiência humana (HIV - AIDS - , com ou sem manifestações clínicas e sob tratamento ambulatorial. Para tal, foi realizada pesquisa descritiva e transversal. Os instrumentos utilizados foram: Questionário de Caracterização Sociodemográfica e Clínica; Índice de Qualidade de Sono de Pittsburgh (PSQI-BR. Participaram da pesquisa 122 pacientes (55,7% de homens e 44,3% de mulheres, com idade média de 42,3 (± 8,9 anos, dos quais 53,3% referiram apresentar sono de boa qualidade e 46,7%, sono de má qualidade. Dormiam, em média, 7,3 (± 1,8 horas, com latência de 23,2 (± 26,2 minutos e eficiência do sono de 87,8% (± 14,4. Observou-se associação significativa entre o sono de boa qualidade e os seguintes fatores: ter companheiro(a; apresentar carga viral indetectável; manter comportamento de risco. Recomenda-se que os profissionais de enfermagem incluam sistematicamente questões sobre o sono ao avaliarem o paciente com HIV/AIDS, detectando alterações precocemente e reunindo subsídios para o planejamento de intervenções.

  2. Real-Time Measurements and Modelling on Dynamic Behaviour of SonoVue Bubbles Based on Light Scattering Technology

    International Nuclear Information System (INIS)

    Juan, Tu; Rongjue, Wei; Guan, J. F.; Matula, T. J.; Crum, L. A.

    2008-01-01

    The dynamic behaviour of SonoVue microbubbles, a new generation ultrasound contrast agent, is investigated in real time with light scattering method. Highly diluted SonoVue microbubbles are injected into a diluted gel made of xanthan gum and water. The responses of individual SonoVue bubbles to driven ultrasound pulses are measured. Both linear and nonlinear bubble oscillations are observed and the results suggest that SonoVue microbubbles can generate strong nonlinear responses. By fitting the experimental data of individual bubble responses with Sarkar's model, the shell coating parameter of the bubbles and dilatational viscosity is estimated to be 7.0 nm·s·Pa

  3. Advanced oxidation of Reactive Blue 181 solution: a comparison between Fenton and Sono-Fenton process.

    Science.gov (United States)

    Basturk, Emine; Karatas, Mustafa

    2014-09-01

    In this work, the decolorization of C.I. Reactive Blue 181 (RB181), an anthraquinone dye, by Ultrasound and Fe(2+) H2O2 processes was investigated. The effects of operating parameters, such as Fe(2+) dosage, H2O2 dosage, pH value, reaction time and temperature were examined. Process optimisation [pH, ferrous ion (Fe(2+)), hydrogen peroxide (H2O2), and reaction time], kinetic studies and their comparison were carried out for both of the processes. The Sono-Fenton process was performed by indirect sonication in an ultrasonic water bath, which was operated at a fixed 35-kHz frequency. The optimum conditions were determined as [Fe(2+)]=30 mg/L, [H2O2]=50 mg/L and pH=3 for the Fenton process and [Fe(2+)]=10 mg/L, [H2O2]=40 mg/L and pH=3 for the Sono-Fenton process. The colour removals were 88% and 93.5% by the Fenton and Sono-Fenton processes, respectively. The highest decolorization was achieved by the Sono-Fenton process because of the production of some oxidising agents as a result of sonication. The paper also discussed kinetic parameters. The decolorization kinetic of RB181 followed pseudo-second-order reaction (Fenton study) and Behnajady kinetics (Sono-Fenton study). Copyright © 2014 Elsevier B.V. All rights reserved.

  4. Estudo comparativo de padrões de sono em trabalhadores de enfermagem dos turnos diurno e noturno

    Directory of Open Access Journals (Sweden)

    Milva Maria Figueiredo de Martino

    2002-08-01

    Full Text Available Objetivo. Comparar os padrões de sono de enfermeiros dos turnos diurno e noturno em um hospital de Campinas (SP, Brasil. Métodos. Participaram 59 enfermeiros entre 23 e 59 anos. Para os enfermeiros do dia, analisou-se o sono noturno, e, para os da noite, os sonos diurno e noturno. Os informantes preencheram um diário do sono durante 1 semana, ao acordar. Foram analisados hora de ir deitar, de dormir, e de acordar; latência do sono; horas de sono noturno e diurno; cochilos; qualidade do sono; modo de acordar; e comparação do sono registrado no diário com o sono habitual. Também foram coletadas informações pessoais e profissionais. Resultados. O grupo diurno ia dormir às 23h36min e o grupo noturno, às 23h52min (P <=0,004, Wilcoxon. Os enfermeiros diurnos acordavam mais cedo (7h3min do que os noturnos quando dormiam à noite (8h30min. A latência média do sono foi de 23min26s para os enfermeiros diurnos contra 22min50s para os noturnos; a duração do sono noturno foi de 7h11min e 9h6min, respectivamente. O cochilo esteve presente apenas no grupo diurno (média de 2h3min. O sono diurno dos enfermeiros da noite foi caracterizado pelo fracionamento (dois períodos, tempo de sono de 4h7min e 2h38min. O sono noturno do grupo noturno foi de melhor qualidade. O tempo médio de trabalho em hospital foi de 14,31 anos no grupo diurno contra 7,07 no grupo noturno (P <=0,05, Wilcoxon. Os sujeitos possuíam hábitos saudáveis, principalmente quanto ao consumo de álcool. Verificou-se uso de anti-hipertensivos, diuréticos e analgésicos. Conclusões. Os achados foram semelhantes aos descritos anteriormente. Seria recomendável que os enfermeiros do turno da noite pudessem tirar cochilos para compensar o déficit de sono durante a atividade noturna.

  5. Síndrome da apneia e hipopneia obstrutiva do sono – SAHOS

    Directory of Open Access Journals (Sweden)

    Hélio Brasileiro

    2009-03-01

    Full Text Available A Síndrome da Apneia e Hipopneia Obstrutiva do Sono (SAHOS é caracterizada por episódios repetitivos de apneia e hipopneia durante o sono. Em artigos recentes, SAHOS severa (quando o número de apneia e hipopneia por hora de sono é maior que 30 é citada como fator de risco para doenças cardiovasculares e morte. Além disso, SAHOS é muito prevalente em pacientes com obesidade, diabetes e hipertensão arterial sistêmica, que também são fatores de risco para doença cardiovascular. A leptina e a grelina, dois hormônios reguladores do apetite, estão aumentadas em pacientes com SAHOS, segundo alguns artigos. Contudo, SAHOS é ainda uma doença subdiagnosticada.

  6. Sono e adolescência: quantas horas os adolescentes precisam dormir?

    Directory of Open Access Journals (Sweden)

    Érico Felden Pereira

    2015-03-01

    Full Text Available Objetivo Determinar a especificidade e a sensibilidade de uma medida para apontar o melhor ponto de corte para a duração de sono como preditor da sonolência diurna excessiva em adolescentes. Métodos Participaram do estudo 1.359 adolescentes, com idades de 14 a 21 anos, de duas cidades do sul do Brasil, que responderam a questionário de hábitos de sono e sonolência diurna. Utilizou-se a Receiver Operating Characteristic para estimar a capacidade preditiva da duração de sono para a sonolência diurna excessiva. Resultados A média de duração do sono para os adolescentes com sonolência diurna excessiva foi de 7,9 horas e para aqueles sem sonolência diurna excessiva foi de 8,33 horas (p < 0,001. A prevalência de sonolência diurna excessiva foi de 35,7%. Foi observada correlação significativa e negativa entre a duração do sono e as idades analisadas (p < 0,001. A análise de Receiver Operating Characteristic indicou duração mínima de 8,33 horas como proteção para a sonolência diurna excessiva. Conclusão Foi observada alta prevalência de sonolência diurna excessiva e propõe-se como possível duração de sono um mínimo de 8,33 horas nos dias com aula para que os adolescentes evitem esse desfecho.

  7. O plantão noturno em anestesia reduz a latência ao sono

    OpenAIRE

    Mathias, Lígia Andrade da Silva Telles; Coelho, Christina Morotomi Funatsu; Vilela, Elizabeth Pricoli; Vieira, Joaquim Edson; Pagnocca, Marcelo Lacava

    2004-01-01

    JUSTIFICATIVA E OBJETIVOS: Os médicos em geral, os anestesiologistas em particular, têm jornadas de trabalho prolongadas. Os residentes de Anestesiologia podem apresentar fadiga e estresse significativos. O objetivo deste trabalho foi verificar, em residentes de primeiro e segundo anos a latência do sono em períodos após plantão. MÉTODO: Foram avaliados 11 residentes em situações distintas: às 7 horas da manhã, após noite de sono normal (> 7h), sem plantão nos 3 dias anteriores (M1); às 7 hor...

  8. Sono e adolescência: quantas horas os adolescentes precisam dormir?

    OpenAIRE

    Pereira,Érico Felden; Barbosa,Diego Grasel; Andrade,Rubian Diego; Claumann,Gaia Salvador; Pelegrini,Andreia; Louzada,Fernando Mazzilli

    2015-01-01

    Objetivo Determinar a especificidade e a sensibilidade de uma medida para apontar o melhor ponto de corte para a duração de sono como preditor da sonolência diurna excessiva em adolescentes. Métodos Participaram do estudo 1.359 adolescentes, com idades de 14 a 21 anos, de duas cidades do sul do Brasil, que responderam a questionário de hábitos de sono e sonolência diurna. Utilizou-se a Receiver Operating Characteristic para estimar a capacidade preditiva da ...

  9. Characteristics of a Ti:sapphire laser pumped by a Nd:YAG laser and its analysis. Nd:YAG laser reiki Ti:sapphire laser no dosa tokusei to sono kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Okada, T.; Masumoto, J.; Mizunami, T.; Maeda, M.; Muraoka, K. (Kyushu Univ., Fukuoka (Japan). Faculty of Engineering)

    1991-06-29

    Although Ti: Sapphire expects of a possibility of being a light source much superior to a dye laser having been used as a wavelength variable laser for spectral analyses, it has a limitation that it does not oscillate directly in the visible and ultraviolet regions. In order to develop a light source that is synchronizable over ultraviolet-near infrared regions, by means of combining a Ti: Sapphire laser of a high peak power, comprising an oscillator and a multistage amplifier, with a non-linear frequency conversion method for harmonic generation and Raman conversion, a prototype Ti:Sapphire laser that is excited by YAG laser second harmonic, and that synchronizes with a prism was fabricated, and its operational characteristics were investigated. As a result, an output energy of 35.6 mJ at a maximum was obtained at a wavelength of 773 nm against an excitation energy of 129 mJ, a conversion efficiency of 38.2% was obtained against the absorption energy of the crystals, and a continuous synchronism was achieved over 750 to 900 nm. 4 refs., 9 figs., 1 tab.

  10. Research and development of photovoltaic power system. Study of carrier dynamics in a-Si from optical and optoelectronic properties; Taiyoko hatsuden system no kenky kaihatsu. Amorphous silicon no koden tokusei to sono carrier dynamics no kogakuteki kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Hamakawa, K [Osaka University, Osaka (Japan). Faculty of Engineering Science

    1994-12-01

    This paper reports the result obtained during fiscal 1994 on research on an optical study of optoelectronic properties of amorphous silicon and its carrier dynamics. Studies have been performed on elucidation of the optoelectronic conversion mechanism in an a-Si film p-i-n junction system and the relationship of the mechanism with the optoelectronic properties. In the studies, optically induced defect level distribution was evaluated by using the modulated optical current spectroscopy, and confirmation was made on model forecast and qualitative agreement, such as large increase in neutral defect levels in association with beam irradiation. In research on elucidation of a film forming mechanism for a-Si based alloys, and material property control, a high-sensitivity reflective infrared spectroscopy was used to observe mechanisms such as treatments and processes given in device fabrication. In research on optical and optoelectronic properties of an s-Si alloy thin film by using the modulated spectroscopy, a new evaluation technology dealing with amorphous semiconductors was developed. The technology separately evaluates carrier migration factors of electrons and holes by combining polarization angle dependence of electro-absorption signals with hole migration measurements. 4 figs.

  11. Formation of porous carbon materials from phenol-formaldehyde resin and their adsorption characteristics; Fenoru/horumu arudehido jushi kara erareta takosei tanso zairyo no kogeki kozo to sono kyuchaku tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Oda, H.; Tojo, R.; Nomura, A. [Kansai Univ., Osaka (Japan). Faculty of Engineering

    1997-05-15

    In this study, preparation of porous adsorbent with developed micro-pores and meso pores and open pores on the external surface is tried. Namely, PFR-sawdust activated carbon is produced by carbonizing the PFR-sawdust composite materials obtained by adding KOH-immersed wood powders in the preparation of phenol-formaldehyde resin(PFR). Additionally, as a comparative test, KOH is added directly into PFR and PFR-KOH activated carbon is prepared by carbonization. Simultaneously with the clarification of the difference of pore structure between said two kinds of activated carbons, a various kinds of adsorbing tests are carried out to evaluate the adsorbing effects thereof. PFR-KOH activated carbon having a high specific surface area of 3500 m{sup 2}/g and a large number of micro-pore and meso pores is extremely effective in absorption of gas phase while the yield and particle strength are low. PFR-sawdust has a specific surface area of 1500 m{sup 2}/g which is the same level of activated carbons on the market, but the yield thereof is twice as that of PFR-KOH. 9 refs., 5 figs., 3 tabs.

  12. SONO-OXIDATIVE PRE-TREATMENT OF WASTE ACTIVATED SLUDGE BEFORE ANAEROBIC BIODEGRADATION

    Directory of Open Access Journals (Sweden)

    S. Şahinkaya

    Full Text Available Abstract The effects of sonication, potassium ferrate (K2FeO4 oxidation and their simultaneous combination (called "sono-oxidative pre-treatment" on chemical properties and anaerobic digestion of waste activated sludge (WAS were investigated and compared comprehensively. Based on chemical parameters, the optimum operating conditions were found to be 0.3 g K2FeO4/g total solids (TS dosage for 2-h individual K2FeO4 oxidation, 0.50 W/mL ultrasonic power density for 10-min individual sonication and, lastly, the combination of 2.5-min sonication at 0.75 W/mL ultrasonic power density with 2-h chemical oxidation at 0.3 g K2FeO4/g TS dosage for sono-oxidative pre-treatment. The disintegration efficiencies of these methods under the optimized conditions were in the following descending order: 37.8% for sono-oxidative pre-treatment > 26.3% for sonication > 13.1% for K2FeO4 oxidation. The influences of these methods on anaerobic biodegradability were tested with the biochemical methane potential assay. It was seen that the cumulative methane production increased by 9.2% in the K2FeO4 oxidation reactor, 15.8% in the sonicated reactor and 18.6% in the reactor with sono-oxidative pre-treatment, compared to the control (untreated reactor.

  13. Sono assisted electrocoagulation process for the removal of pollutant from pulp and paper industry effluent.

    Science.gov (United States)

    Asaithambi, P; Aziz, Abdul Raman Abdul; Sajjadi, Baharak; Daud, Wan Mohd Ashri Bin Wan

    2017-02-01

    In the present work, the efficiency of the sonication, electrocoagulation, and sono-electrocoagulation process for removal of pollutants from the industrial effluent of the pulp and paper industry was compared. The experimental results showed that the sono-electrocoagulation process yielded higher pollutant removal percentage compared to the sonication and electrocoagulation process alone. The effect of the operating parameters in the sono-electrocoagulation process such as electrolyte concentration (1-5 g/L), current density (1-5 A/dm 2 ), effluent pH (3-11), COD concentration (1500-6000 mg/L), inter-electrode distance (1-3 cm), and electrode combination (Fe and Al) on the color removal, COD removal, and power consumption were studied. The maximum color and COD removal percentages of 100 and 95 %, respectively, were obtained at the current density of 4 A/dm 2 , electrolyte concentration of 4 g/L, effluent pH of 7, COD concentration of 3000 mg/L, electrode combination of Fe/Fe, inter-electrode distance of 1 cm, and reaction time of 4 h, respectively. The color and COD removal percentages were analyzed by using an UV/Vis spectrophotometer and closed reflux method. The results showed that the sono-electrocoagulation process could be used as an efficient and environmental friendly technique for complete pollutant removal.

  14. Trabalho em turnos: estado geral de saúde relacionado ao sono em trabalhadores de enfermagem

    Directory of Open Access Journals (Sweden)

    Sandra Soares Mendes

    2012-12-01

    Full Text Available O objetivo deste estudo foi identificar os sintomas referentes ao estado geral de saúde associado ao trabalho em turnos de enfermagem e relacioná-los com a qualidade do sono. O estudo foi realizado no Hospital da Irmandade da Santa Casa de Poços de Caldas, Minas Gerais. Participaram 136 profissionais de enfermagem, com média de idade de 33,1 anos, divididos nas seguintes categorias: enfermeiro (8,1%; técnico de enfermagem (80,9%; auxiliar de enfermagem dos turnos diurno e noturno (11%. Os sintomas de saúde foram identificados a partir do Inventário de Estado Geral de Saúde, e a qualidade do sono foi avaliada pelo Diário do Sono. Os dados foram estatisticamente significativos pelo Teste Qui-Quadrado (p=0,021 para a presença do sintoma de flatulência ou distensão abdominal no turno noturno. Constatou-se com a análise de regressão linear múltipla que os sujeitos do turno diurno que apresentaram os sintomas de má digestão (às vezes ou sempre e irritabilidade (sempre tiveram pior qualidade de sono noturno.

  15. Failing arsenic mitigation technology in rural Bangladesh: explaining stagnation in niche formation of the Sono filter

    NARCIS (Netherlands)

    Kundu, D.K.; Mol, A.P.J.; Gupta, A.

    2016-01-01

    Arsenic contamination of shallow hand pump tube well drinking water in Bangladesh has created opportunities for radical innovations to emerge. One such innovation is the household Sono filter, designed to remove arsenic from water supplies. Applying a strategic niche management approach, and based

  16. Improvement in mechanical properties of hypereutectic Al-Si-Cu alloys through sono-solidiifed slurry

    Institute of Scientific and Technical Information of China (English)

    Yoshiki Tsunekawa; Shinpei Suetsugu; Masahiro Okumiya; Naoki Nishikawa; Yoshikazu Genma

    2014-01-01

    For the wider applications, it is necessary to improve the ductility as wel as the strength and wear-resistance of hypereutectic Al-Si-Cu aloys, which are typical light-weight wear-resistant materials. An increase in the amounts of primary silicon particles causes the modiifed wear-resistance of hypereutectic Al-Si-Cu aloys, but leads to the poor strength and ductility. It is known that dual phase steels composed of hetero-structure have succeeded in bringing contradictory mechanical properties of high strength and ductility concurrently. In order to apply the idea of hetero-structure to hypereutectic Al-Si-Cu alloys for the achievement of high strength and ductility along with wear resistance, ultrasonic irradiation of the molten metal during the solidiifcation, which is caled sono-solidiifcation, was carried out from its molten state to just above the eutectic temperature. The sono-solidiifed Al-17Si-4Cu aloy is composed of hetero-structure, which are, hard primary silicon particles, soft non-equilibriuma-Al phase and the eutectic region. Rheo-casting was performed at just above the eutectic temperature with sono-solidiifed slurry to shape a disk specimen. After the rheo-casting with modiifed sono-solidiifed slurry held for 45 s at 570 ºC, the quantitative optical microscope observation exhibits that the microstructure is composed of 18area% of hard primary silicon particles and 57area% of softa-Al phase. In contrast, there exist only 5 area% of primary silicon particles and noa-Al phase in rheo-cast specimen with normaly solidiifed slurry. Hence the tensile tests of T6 treated rheo-cast specimens with modified sono-solidified slurry exhibit improved strength and 5% of elongation, regardless of having more than 3 times higher amounts of primary silicon particles compared to that of rheo-cast specimen with normaly solidiifed slurry.

  17. A genética dos distúrbios do sono na infância e adolescência

    OpenAIRE

    Nunes,Magda Lahorgue; Bruni,Oliviero

    2008-01-01

    OBJETIVO: O objetivo deste artigo é revisar a literatura sobre a genética dos distúrbios do sono na infância e adolescência. FONTES DOS DADOS: As palavras-chave "sono" e "genética" foram usadas para pesquisar por artigos publicados nos últimos cinco anos no banco de dados MEDLINE. A seguir, seus resumos foram analisados. A pesquisa também incluiu artigos clássicos, com a primeira descrição dos genes. SÍNTESE DOS DADOS: A recorrência familiar de muitos distúrbios do sono é um achado freqüente,...

  18. Photo oxidative degradation of azure-B by sono-photo-Fenton and photo-Fenton reagents

    Directory of Open Access Journals (Sweden)

    Prahlad Vaishnave

    2014-12-01

    Full Text Available A model for the decomposition of azure-B by photo-Fenton reagent in the presence of ultrasound in homogeneous aqueous solution has been described. The photochemical decomposition rate of azure-B is markedly increased in the presence of ultrasound. It is a rather inexpensive reagent for wastewater treatment. The effect of different variables like the concentration of ferric ion, concentration of dye, hydrogen peroxide, pH, light intensity etc. on the reaction rate has been observed. The progress of the sono-photochemical degradation was monitored spectrophotometrically. The optimum sono-photochemical degradation conditions were experimentally determined. The results showed that the dye was completely oxidized and degraded into CO2 and H2O. A suitable tentative mechanism for sono-photochemical bleaching of azure-B by sono-photo-Fenton’s reaction has been proposed.

  19. Estudo prospectivo sobre os hábitos de sono na criança e no adolescente

    Directory of Open Access Journals (Sweden)

    Vera Rocha

    2017-06-01

    Full Text Available Introdução: O sono desempenha um papel fundamental do ponto de vista biológico, emocional, familiar e social. O impacto do sono sobre a saúde ganhou nos últimos tempos, uma maior atenção e tem-se tornado uma preocupação crescente dos pais. Este estudo tem como objetivos avaliar e caracterizar os hábitos de sono das crianças e dos adolescentes e relacionar o padrão de sono e o rendimento escolar desta população. Métodos: Foi aplicado um inquérito por entrevista direta com as crianças e adolescentes com idades entre os 10 e os 18 anos, em consulta de vigilância de saúde infantil, durante três meses. Resultados: Analisaram-se 113 inquéritos. A idade mediana foi de 13 anos, sendo 62,8% do sexo feminino. A mediana da duração do sono em ambos os sexos foi de 8 horas. Apenas 15 (13,3% cumpriram a recomendação das 10 a 11 horas de sono. 51,2 % das crianças / adolescentes que ficaram retidos, pelo menos uma vez, no mesmo ano letivo, dormiam menos de oito horas / dia (p <0,001. Cerca de 88% com a autoavaliação do desempenho escolar como “mau” apresentavam uma duração do sono inferior a 8 horas, sendo essa proporção de 11,8% (17% do total de inquiridos naqueles com uma autoavaliação “muito bom” (p <0,001. Crianças/ adolescentes com uma duração de menos de oito horas/ dia apresentavam uma probabilidade 5,5 vezes maior de ficarem retidos no mesmo ano escolar em comparação com aqueles com a duração mínima de 8 horas de sono. Foram encontradas diferenças estatisticamente significativas (p <0,001 entre a duração do sono e a dificuldade em adormecer e o adormecer em sala de aula. Discussão/ Conclusões: Os resultados mostram que é importante atuar na prevenção, alertando pais, crianças e adolescentes para a importância de uma boa higiene do sono, promovendo padrões de sono saudável.

  20. Fatores que interferem no sono dos alunos idosos da Universidade da Maturidade (UMA, na cidade de Palmas (TO

    Directory of Open Access Journals (Sweden)

    Núbia Kênia Carneiro Silva

    2015-05-01

    Full Text Available O processo de senescência ocasiona mudanças na quantidade e qualidade do sono; assim, a maioria dos idosos tem queixas relacionadas ao sono, decorrentes de mudanças fisiológicas específicas do processo de envelhecimento, que podem causar distúrbios relacionados ao sono. Objetiva-se verificar quais os fatores que interferem no sono dos idosos alunos da Universidade da Maturidade (UMA, na cidade de Palmas (TO. Trata-se de um estudo descritivo de corte transversal, e de natureza quantitativa. Para o levantamento dos dados, utilizaram-se os instrumentos: Questionário de caracterização socioeconômico, seguido da Escala de Sonolência de Epworth (ESE, e do Índice de Qualidade de Sono de Pittsburgh (PSQI. Os resultados da ESE revelaram que 75% do grupo masculino e 51,85% do feminino apresentaram sonolência diurna excessiva normal com escores <10. As respostas abertas do PSQI, em relação à hora de deitar, mostram que 43,75% dos homens deitavam entre 23 e 24 horas; no grupo das mulheres, 29,63% deitavam entre 21 e 22 horas; quanto ao tempo para dormir, 68,75% dos homens e 62,96% das mulheres demoravam ≤ 15 minutos; em relação à hora de acordar, 75% dos homens e 37,04% das mulheres acordam entre 6 e 7 horas; em relação a quantas horas de sono dormiu por noite, 50% dos homens dormiram entre 7 e 8 horas por noite, e 51,85% das mulheres dormiram ≥ 8 horas por noite. Já no PSQI global, 56,25% dos homens possuem uma boa qualidade do sono, enquanto 66,67% das mulheres apresentaram má qualidade do sono, apesar de terem uma maior eficiência relacionada ao sono. Os resultados mostraram que os homens tiveram uma boa qualidade do sono e as mulheres tiveram uma má qualidade do sono.  

  1. Effect of acoustic parameters on the cavitation behavior of SonoVue microbubbles induced by pulsed ultrasound.

    Science.gov (United States)

    Lin, Yutong; Lin, Lizhou; Cheng, Mouwen; Jin, Lifang; Du, Lianfang; Han, Tao; Xu, Lin; Yu, Alfred C H; Qin, Peng

    2017-03-01

    SonoVue microbubbles could serve as artificial nuclei for ultrasound-triggered stable and inertial cavitation, resulting in beneficial biological effects for future therapeutic applications. To optimize and control the use of the cavitation of SonoVue bubbles in therapy while ensuring safety, it is important to comprehensively understand the relationship between the acoustic parameters and the cavitation behavior of the SonoVue bubbles. An agarose-gel tissue phantom was fabricated to hold the SonoVue bubble suspension. 1-MHz transmitting transducer calibrated by a hydrophone was used to trigger the cavitation of SonoVue bubbles under different ultrasonic parameters (i.e., peak rarefactional pressure (PRP), pulse repetition frequency (PRF), and pulse duration (PD)). Another 7.5-MHz focused transducer was employed to passively receive acoustic signals from the exposed bubbles. The ultraharmonics and broadband intensities in the acoustic emission spectra were measured to quantify the extent of stable and inertial cavitation of SonoVue bubbles, respectively. We found that the onset of both stable and inertial cavitation exhibited a strong dependence on the PRP and PD and a relatively weak dependence on the PRF. Approximate 0.25MPa PRP with more than 20μs PD was considered to be necessary for ultraharmonics emission of SonoVue bubbles, and obvious broadband signals started to appear when the PRP exceeded 0.40MPa. Moreover, the doses of stable and inertial cavitation varied with the PRP. The stable cavitation dose initially increased with increasing PRP, and then decreased rapidly after 0.5MPa. By contrast, the inertial cavitation dose continuously increased with increasing PRP. Finally, the doses of both stable and inertial cavitation were positively correlated with PRF and PD. These results could provide instructive information for optimizing future therapeutic applications of SonoVue bubbles. Copyright © 2016 Elsevier B.V. All rights reserved.

  2. Charge retention in scaled SONOS nonvolatile semiconductor memory devices—Modeling and characterization

    Science.gov (United States)

    Hu, Yin; White, Marvin H.

    1993-10-01

    A new analytical model is developed to investigate the influence of the charge loss processes in the retention mode of the SONOS NVSM device. The model considers charge loss by the following processes: (1) electron back-tunneling from the nitride traps to the Si conduction band, (2) electron back-tunneling from the nitride traps to the Si/SiO 2 interface traps and (3) hole injection from the Si valence band to the nitride traps. An amphoteric trap charge distribution is used in this model. The new charge retention model predicts that process (1) determines the short term retention, while processes (2) and (3) determine the long term retention. Good agreement has been reached between the results of analytical calculations and the experimental retention data on both surface channel and buried channel SONOS devices.

  3. Le soluzioni di logistica urbana sono sostenibili? L'esempio di Cityporto

    Directory of Open Access Journals (Sweden)

    Jesus Gonzalez-Feliu

    2010-07-01

    Full Text Available La logistica urbana è un campo di riflessione volto ad approfondire le soluzioni ottimali per la distribuzione delle merci in ambito urbano e i relativi obiettivi ambientali. Ad oggi, molte azioni sono state intraprese dalle pubbliche autorità senza tenere conto, tuttavia, degli impatti che i nuovi schemi organizzativi possono avere sull’ attuale organizzazione delle imprese. Il contributo incentra la riflessione sul caso studio relativo alla città di Padova, in Italia: il sistema di logistica urbana CityPorto. In particolare, se ne analizzano le caratteristiche dal punto di vista della sostenibilità del sistema proposto, sia in riferimento alla dimensione imprenditoriale che a quella collettiva, mettendo in relazione le peculiarità della logistica urbana e le più estese catene distributive, di scala globale, di cui le prime sono parte integrante.

  4. Qualidade do sono e marcadores endócrinos e bioquímicos

    OpenAIRE

    Carvalho, Ana Sofia Coelho de; Fernandes, Adília; Belen Gallego, Ana; Vaz, Josiana A.; Sierra Vega, Matilde

    2016-01-01

    O sono e o repouso constituem o ritmo biológico base da espécie humana e são fundamentais para uma boa saúde e qualidade de vida, com especial significado em crianças e jovens (DGS, 2015). Dormir bem é fundamental para a recuperação física e psíquica do indivíduo, indispensável para sermos saudáveis e essencial para nos mantermos ativos, concentrados e bem-dispostos. O sono é um equilibrador do humor e das emoções, recupera o corpo e a memória, estimula a criatividade e aumenta e consolida a ...

  5. Appearance of high submerged cavitating jet: The cavitation phenomenon and sono luminescence

    Directory of Open Access Journals (Sweden)

    Hutli Ezddin

    2013-01-01

    Full Text Available In order to study jet structure and behaviour of cloud cavitation within time and space, visualization of highly submerged cavitating water jet has been done using Stanford Optics 4 Quick 05 equipment, through endoscopes and other lenses with Drello3244 and Strobex Flash Chadwick as flashlight stroboscope. This included obligatory synchronization with several types of techniques and lenses. Images of the flow regime have been taken, allowing calculation of the non-dimensional cavitation cloud length under working conditions. Consequently a certain correlation has been proposed. The influencing parameters, such as; injection pressure, downstream pressure and cavitation number were experimentally proved to be very significant. The recordings of sono-luminescence phenomenon proved the collapsing of bubbles everywhere along the jet trajectory. In addition, the effect of temperature on sono-luminescence recordings was also a point of investigation. [Projekat Ministarstva nauke Republike Srbije, br. TR35046

  6. Qualidade de sono de trabalhadores obesos de um hospital universitário: acupuntura como terapia complementar

    Directory of Open Access Journals (Sweden)

    Mariana Lourenço Haddad

    2012-02-01

    Full Text Available O objetivo do estudo foi verificar o efeito da acupuntura na qualidade de sono de trabalhadores obesos em um hospital universitário. Os dados foram coletados no período de julho a outubro de 2009, junto a 37 funcionários, submetidos a oito aplicações semanais de acupuntura. O Índice de Qualidade de Sono de Pittsburgh foi utilizado para identificar a qualidade de sono dos sujeitos antes e após a intervenção. Os resultados mostram que antes da intervenção cinco (13,5% pessoas apresentaram boa qualidade de sono e, ao final da intervenção, 14 (37,8% relataram este quadro. A diferença obtida na comparação das médias dos escores obtidos antes e após a acupuntura foi significativa (p=0,0001. Concluiu-se que a acupuntura produziu um efeito positivo sobre a qualidade do sono na amostra estudada, apresentando-se como uma técnica adjuvante no tratamento dos distúrbios do sono e consequentemente na melhoria da qualidade de vida desta população.

  7. Improvement in mechanical properties of hypereutectic Al-Si-Cu alloys through sono-solidified

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    Yoshiki Tsunekawa

    2014-07-01

    Full Text Available For the wider applications, it is necessary to improve the ductility as well as the strength and wear-resistance of hypereutectic Al-Si-Cu alloys, which are typical light-weight wear-resistant materials. An increase in the amounts of primary silicon particles causes the modified wear-resistance of hypereutectic Al-Si-Cu alloys, but leads to the poor strength and ductility. It is known that dual phase steels composed of hetero-structure have succeeded in bringing contradictory mechanical properties of high strength and ductility concurrently. In order to apply the idea of hetero-structure to hypereutectic Al-Si-Cu alloys for the achievement of high strength and ductility along with wear resistance, ultrasonic irradiation of the molten metal during the solidification, which is called sono-solidification, was carried out from its molten state to just above the eutectic temperature. The sono-solidified Al-17Si-4Cu alloy is composed of hetero-structure, which are, hard primary silicon particles, soft non-equilibrium a -Al phase and the eutectic region. Rheo-casting was performed at just above the eutectic temperature with sono-solidified slurry to shape a disk specimen. After the rheo-casting with modified sonosolidified slurry held for 45 s at 570 篊, the quantitative optical microscope observation exhibits that the microstructure is composed of 18area% of hard primary silicon particles and 57area% of soft a -Al phase. In contrast, there exist only 5 area% of primary silicon particles and no a -Al phase in rheo-cast specimen with normally solidified slurry. Hence the tensile tests of T6 treated rheo-cast specimens with modified sono-solidified slurry exhibit improved strength and 5% of elongation, regardless of having more than 3 times higher amounts of primary silicon particles compared to that of rheo-cast specimen with normally solidified slurry.

  8. Privação de sono total na doença de Parkinson

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    Paulo H. F. Bertolucci

    1987-09-01

    Full Text Available Doze pacientes com doença de Parkinson (DP foram submetidos a privação de sono total. A média de idade dos pacientes era 61 anos e a duração da doença era em média de 5,1 anos (1,5 a 12 anos. Quatro deles usavam apenas anticolinérgico, 4 usavam L-Dopa e 4 combinação de drogas de ambos os grupos. Após privação de sono total por uma única noite foi verificada melhora na rigidez, bradicinesia, alterações de postura e marcha e incapacidade funcional com duração de duas semanas, em comparação com os escores quando da inclusão no estudo. Não foi observado efeito sobre o tremor. Em relação aos sintomas depressivos foi verificada melhora com duração de apenas uma semana. Estes resultados sugerem efeito benéfico da privação de sono na DP. Com base em estudos experimentais julgamos que uma explicação possível para estes resultados seja a modificação de receptores dopaminérgicos.

  9. Sono-electroanalysis of copper: enhanced detection and determination in the presence of surfactants.

    Science.gov (United States)

    Hardcastle, Joanna Lorraine; Hignett, Geraldine; Melville, James L; Compton, Richard G

    2002-04-01

    Surfactant adsorption has been shown to have a passivating effect on the electrode surface during anodic stripping voltammetric measurements. In the present work the feasibility of sono-anodic stripping analysis for the determination of copper in aqueous media contaminated with surfactant has been studied at an unmodified bare glassy carbon electrode. We illustrate the deleterious effect of three common surfactants, sodium dodecyl sulfate (SDS), dodecyl pyridinium chloride (DPC) and Triton-X 100 (TX-100) on conventional electroanalysis. The analogous sono-electroanalytical response was investigated for each surfactant at ultrasound intensities above and below the cavitation threshold. The enhancement in the stripping signal observed is attributed to the increased mass transport due to acoustic streaming and above the cavitation threshold the intensity of cavitational events is significantly increased leading to shearing of adsorbed surfactant molecules from the surface. As a result accurate analyses for SDS concentrations up to 100 ppm are possible, with analytical signals visible in solutions of SDS and TX-100 of 1000 ppm. Analysis is reported in high concentration of surfactant with use of sono-solvent double extraction. The power of this technique is clearly illustrated by the ability to obtain accurate measurements of copper concentration from starting solutions containing 1000 ppm SDS or TX-100. This was also exemplified by analysis of the low concentration 0.3 microM Cu(II) solution giving a percentage recovery of 94% in the presence of 1000 ppm SDS or TX-100.

  10. Memristive device based on a depletion-type SONOS field effect transistor

    Science.gov (United States)

    Himmel, N.; Ziegler, M.; Mähne, H.; Thiem, S.; Winterfeld, H.; Kohlstedt, H.

    2017-06-01

    State-of-the-art SONOS (silicon-oxide-nitride-oxide-polysilicon) field effect transistors were operated in a memristive switching mode. The circuit design is a variation of the MemFlash concept and the particular properties of depletion type SONOS-transistors were taken into account. The transistor was externally wired with a resistively shunted pn-diode. Experimental current-voltage curves show analog bipolar switching characteristics within a bias voltage range of ±10 V, exhibiting a pronounced asymmetric hysteresis loop. The experimental data are confirmed by SPICE simulations. The underlying memristive mechanism is purely electronic, which eliminates an initial forming step of the as-fabricated cells. This fact, together with reasonable design flexibility, in particular to adjust the maximum R ON/R OFF ratio, makes these cells attractive for neuromorphic applications. The relative large set and reset voltage around ±10 V might be decreased by using thinner gate-oxides. The all-electric operation principle, in combination with an established silicon manufacturing process of SONOS devices at the Semiconductor Foundry X-FAB, promise reliable operation, low parameter spread and high integration density.

  11. Treating soil-washing fluids polluted with oxyfluorfen by sono-electrolysis with diamond anodes.

    Science.gov (United States)

    Vieira Dos Santos, E; Sáez, C; Cañizares, P; Martínez-Huitle, C A; Rodrigo, M A

    2017-01-01

    This works is focused on the treatment by sono-electrolysis of the liquid effluents produced during the Surfactant-Aided Soil-Washing (SASW) of soils spiked with herbicide oxyfluorfen. Results show that this combined technology is very efficient and attains the complete mineralization of the waste, regardless of the surfactant/soil radio applied in the SASW process (which is the main parameter of the soil remediation process and leads to very different wastes). Both the surfactant and the herbicide are completely degraded, even when single electrolysis is used; and only two intermediates are detected by HPLC in very low concentrations. Conversely, the efficiency of single sonolysis approach, for the oxidation of pollutant, is very low and just small changes in the herbicides and surfactant concentrations are observed during the tests carried out. Sono-electrolysis with diamond electrodes achieved higher degradation rates than those obtained by single sonolysis and/or single electrolysis with diamond anodes. A key role of sulfate is developed, when it is released after the electrochemical degradation of surfactant. The efficient catalytic effect observed which can be explained by the anodic formation of persulfate and the later, a sono-activation is attained to produce highly efficient sulfate radicals. The effect of irradiating US is more importantly observed in the pesticide than in the surfactant, in agreement with the well-known behavior of these radicals which are known to oxidize more efficiently aromatic compounds than aliphatic species. Copyright © 2016 Elsevier B.V. All rights reserved.

  12. Avaliação da qualidade de vida e do sono de atletas paralímpicos brasileiros

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    Andrea Maculano Esteves

    2015-02-01

    Full Text Available INTRODUÇÃO: o esporte paralímpico brasileiro vem ganhando destaque no cenário mundial e, com isso, a avaliação de variáveis que possam influenciar positivamente no desempenho desses atletas é de suma importância para o acompanhamento durante o seu período de treinamento. OBJETIVO: avaliar a qualidade de vida e do sono de atletas paralímpicos brasileiros. MÉTODOS: foram estudados 49 atletas paralímpicos das modalidades natação (n=20 e atletismo (n=29. Os atletas responderam a questionários que avaliaram seu padrão e queixas de sono e qualidade de vida. RESULTADOS: a maioria dos atletas (65,30% relatou má qualidade do sono, visto que a latência do sono neste grupo foi significativamente maior do que em atletas com boa qualidade de sono. Cinquenta por cento dos atletas relataram o desejo de fazer mudanças em seu horário de sono e 52% gostariam de aumentar o seu tempo de sono. A sonolência diurna excessiva foi observada em 53,06% dos atletas. Quanto às queixas de distúrbios do sono, foram relatados chute ou espasmos das pernas e ronco. Menores índices de qualidade de vida foram encontrados no meio ambiente em comparação com os domínios físicos, psicológicos ou sociais. CONCLUSÕES: os resultados sugerem que a maioria dos atletas apresentou uma má qualidade do sono e, consequentemente, um alto índice de insatisfação com o sono. Além disso, menores escores de qualidade de vida foram encontrados no domínio ambiental, que está relacionado com a segurança física, proteção e condições em casa.

  13. Mecanismos do ciclo sono-vigília Sleep-wake cycle mechanisms

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    Flávio Alóe

    2005-05-01

    Full Text Available Três sub-divisões hipotalâmicas são importantes no ciclo sono-vigília: o hipotálamo anterior (núcleos gabaérgicos e núcleos supraquiasmáticos, o hipotálamo posterior (núcleo túbero-mamilar histaminérgico e o hipotálamo lateral (sistema hipocretinas. O sistema gabaérgico inibitório do núcleo pré-óptico ventro-lateral (VLPO do hipotálamo anterior é responsável pelo início e manutenção do sono NREM. Os neurônios supraquiasmáticos (NSQs do hipotálamo anterior são responsáveis pelo ritmo circadiano do ciclo sono-vigília. Os núcleos aminérgicos, histaminérgicos, as hipocretinas e núcleos colinérgicos do prosencéfalo basal apresentam-se ativos durante a vigília, inibindo o núcleo pré-óptico ventro-lateral, promovendo a vigília. O processo de inibição-estimulação é a base do modelo da interação recíproca entre os grupos de células wake-off-sleep-on e células wake-off-sleep-on reguladores do ciclo sono-vigília. O modelo da interação recíproca também se aplica aos núcleos colinérgicos (células REM-on e aminérgicos (células REM-off do tronco cerebral no controle temporal do sono REM-NREM.Neurochemically distinct systems interact regulating sleep and wakefulness. Wakefulness is promoted by aminergic, acetylcholinergic brainstem and hypothalamic systems. Each of these arousal systems supports wakefulness and coordinated activity is required for alertness and EEG activation. Neurons in the pons and preoptic area control rapid eye movement and non-rapid eye movement sleep. Mutual inhibition between these wake- and sleep-regulating systems generate behavioral states. An up-to-date understanding of these systems should allow clinicians and researchers to better understand the effects of drugs, lesions, and neurologic disease on sleep and wakefulness.

  14. Relação entre a prevalência de Bruxismo e a Apneia do Sono

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    Andressa Bergmeier

    2016-08-01

    Full Text Available A síndrome da apneia obstrutiva do sono é considerada um transtorno respiratório do sono cuja característica principal são pausas na respiração durante o sono. Estas paradas podem ter relação com várias patologias do sono, como por exemplo o bruxismo, que nada mais é que o contato não-funcional dos dentes. O objetivo do presente trabalho foi verificar a prevalência do bruxismo em pacientes com a apneia do sono e avaliar se há uma relação deste com o grau de apneia. A avaliação foi realizada através de exame polissonográfico, onde foram avaliados 23 pacientes que se submeteram à polissonografia na clinica SNN no mês de agosto. Os dados da pesquisa demonstraram que 52% dos participantes foram diagnosticados com apneia do sono do tipo grave e destes, 75% além de apneia possuíam bruxismo. A apneia moderada foi diagnosticada em 26% dos pacientes, onde 8,30% tiveram episódios de bruxismo.  Já 22% dos pacientes possuíam Apneia leve, e destes 16,70% tiveram episodio de bruxismo. Não houve Correlação significativa entre o grau de apneia e a frequência de bruxismo (rho= 0,403 e p=0,057.  Conclui-se então, que nesta pesquisa o bruxismo não apresentou relação estatisticamente significante com o grau de apneia do sono, mesmo ele ocorrendo com uma maior predominância em pacientes que possuíam apneia do tipo grave.

  15. Comportamentos associados ao sono em estudantes do ensino médio: análises transversal e prospectiva

    Directory of Open Access Journals (Sweden)

    Luana Peter Hoefelmann

    2014-05-01

    Full Text Available DOI: http://dx.doi.org/10.5007/1980-0037.2014v16s1p68 A associação entre comportamentos de saúde e sono tem sido testada em jovens com dados transversais, mas evidências prospectivas são necessárias. O objetivo do estudo foi verificar associações transversais e prospectivas entre variáveis comportamentais e percepções de qualidade e duração de sono. Análise secundária transversal e longitudinal dos dados da pesquisa “Saúde na Boa”, desenvolvido de março a dezembro de 2006, com amostra aleatória de estudantes de ensino médio (14-24 anos de 20 escolas públicas de Recife e Florianópolis. A percepção da qualidade e da duração do sono e as variáveis do estilo de vida foram obtidas por autorrelato. Utilizaram-se regressões logísticas binárias brutas e ajustadas. Nos dados transversais e longitudinais, 45,7% e 45,8% dos jovens relataram má qualidade e 76,7% e 77,5% reportaram duração insuficiente do sono, respectivamente. Na análise transversal, a menor prática de atividade física (OR = 0,74; IC 95%: 0,55; 0,99 e o maior consumo de salgados (OR = 1,67; IC 95%: 1,18; 2,36 estiveram associados à qualidade negativa do sono, enquanto o tempo excessivo de televisão (OR = 0,48; IC 95%: 0,30; 0,75 e de consumo de refrigerantes (OR = 1,84; IC 95%: 1,19; 2,84 associaram-se à duração insuficiente do sono. Na análise prospectiva, nenhum dos comportamentos estudados se manteve associado à qualidade e duração do sono. As prevalências de percepção de qualidade e duração do sono se mantiveram estáveis nos dois momentos analisados. Alguns comportamentos se associaram às percepções de sono em análises transversais, mas estes achados não se confirmaram em análises prospectivas.

  16. Sono-photo-Fenton oxidation of bisphenol-A over a LaFeO3 perovskite catalyst.

    Science.gov (United States)

    Dükkancı, Meral

    2018-01-01

    In this study, oxidation of bisphenol-A (IUPAC name - 2,2-(4,4-dihydroxyphenyl, BPA), which is an endocrine disrupting phenolic compound used in the polycarbonate plastic and epoxy resin industry, was investigated using sono-photo-Fenton process under visible light irradiation in the presence of an iron containing perovskite catalyst, LaFeO 3 . The catalyst prepared by sol-gel method, calcined at 500°C showed a catalytic activity in BPA oxidation using sono-photo-Fenton process with a degradation degree and a chemical oxygen demand (COD) reduction of 21.8% and 11.2%, respectively. Degradation of BPA was studied by using individual and combined advanced oxidation techniques including sonication, heterogeneous Fenton reaction and photo oxidation over this catalyst to understand the effect of each process on degradation of BPA. It was seen, the role of sonication was very important in hybrid sono-photo-Fenton process due to the pyrolysis and sonoluminescence effects caused by ultrasonic irradiation. The prepared LaFeO 3 perovskite catalyst was a good sonocatalyst rather than a photocatalyst. Sonication was not only the effective process to degrade BPA but also it was the cost effective process in terms of energy consumption. The studies show that the energy consumption is lower in the sono-Fenton process than those in the photo-Fenton and sono-photo- Fenton processes. Copyright © 2017 Elsevier B.V. All rights reserved.

  17. Horas de sono e índice de massa corporal em pré-escolares do sul do Brasil

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    Maria Laura da Costa Louzada

    2012-12-01

    Full Text Available A prevenção e o tratamento do excesso de peso são particularmente complexos, reforçando a importância de estudos que visem esclarecer sua rede de causas e efeitos. Assim, o objetivo desse estudo foi avaliar a relação entre horas de sono noturnas e medidas antropométricas. Realizou-se uma análise transversal realizada a partir de dados de 348 crianças de 3 e 4 anos da cidade de São Leopoldo/ RS. As horas de sono noturnas foram relatadas pelas mães e as medidas de índice de massa corporal, circunferência da cintura e dobras cutâneas foram medidas de acordo com protocolo padrão. As análises foram ajustadas para consumo energético e horas de televisão assistidas. As crianças com excesso de peso apresentaram, em média, 0,39 horas a menos de sono em relação àquelas com peso adequado (9,77 ± 1,44 versus 10,17 ± 1,34; IC95% 0,03-0,76. Observou-se associação inversa entre horas de sono noturnas e valores de escore z de índice de massa corporal para idade (B = -0,12 IC95% -0,22--0,02. A circunferência da cintura e as dobras cutâneas apresentaram relação inversa com as horas de sono, porém sem diferença estatística. Em pré-escolares do sul do Brasil, menos horas de sono noturnas foram associadas com maiores valores de índice de massa corporal.

  18. TEMPO DE TELA, PERCEPÇÃO DA QUALIDADE DE SONO E EPISÓDIOS DE PARASSONIA EM ADOLESCENTES

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    Alison Oliveira da Silva

    Full Text Available RESUMO Introdução: O sono é um importante componente no processo de desenvolvimento biológico e mental das crianças e dos adolescentes, considerado fonte de revitalização das funções orgânicas. Objetivo: Analisar a associação entre o tipo e tempo de exposição à tela, a percepção da qualidade de sono e os episódios de parassonia em adolescentes. Métodos: Estudo transversal que incorpora um levantamento epidemiológico de base escolar com amostra representativa (n = 481 de estudantes (14 a 19 anos do ensino médio da rede pública estadual do município de Caruaru, PE. Para a análise do sono e do estilo de vida, foi utilizada a versão traduzida e adaptada do Global School-Based Student Health Survey (GSHS. Recorreu-se à regressão logística binária para análise da associação entre as variáveis, considerando-se como desfecho a percepção negativa da qualidade de sono. Resultados: A prevalência de percepção negativa da qualidade de sono foi de 58% (IC 95% 53,5-62,3. Entre os comportamentos analisados, verificou-se que dormir oito horas ou menos por dia e assistir mais de duas horas de TV por dia aumentam, respectivamente, 2,69 (IC 95% 1,61-4,71 e 1,71 (IC 95% 1,08-2,73 as chances de relatar percepção negativa de sono. O tempo excessivo de tela, sobretudo diante da TV, esteve associado à maior quantidade de episódios de parassonia. Conclusão: A qualidade do sono está relacionada tanto com a quantidade de horas de sono, quanto com o tempo de exposição à TV. Além disso, uma quantidade maior de episódios de parassonia ocorreu entre os adolescentes que assistem mais de três horas de TV por dia.

  19. Sono-Guided Percutaneous Automated Gun Biopsy in Pediatric Renal Disease

    International Nuclear Information System (INIS)

    Kim, Jong Chul

    1996-01-01

    To evaluate whether sono-guided percutaneous automated gun biopsy is also useful in pediatricpatients with renal diseases. In the prone position of twenty pediatric patients with renal parenchymal diseases, percutaneous biopsy was done through lateral aspect of the lower pole of left kidney with automated biopsy gun under the guidance of ultrasonography. The biopsy needle was either of 18 or 20 gauge. The obtained core of renal tissue was examined with light, immunofluorescent or electron microscope by the renal pathologist. In 18 among 20 patients, adequate renal tissue core sufficient to be pathologically diagnosed was obtained. The histologic findings were as follows : IG A nephropathy (n = 2), lupus nephritis (n =2), minimal change glomerulonephritis (n = 5), membranoproliferative glomerulonephritis (n = 3), mesangialproliferative glomeru-lonephritis (n = 1), diffuse proliferative glomerulonephritis (n = 3), focalglomerulo-sclerosis (n = 1), membranous glomerulopathy (n = 1). No significant complications occurred during or after the biopsy. Sono-guided percutaneous renal biopsy using automated biopsy gun is also useful todiagnose renal parenchymal diseases without significant complications in pediatric patients

  20. A comparative study of ascending urethrogram and sono-urethrogram in the evaluation of stricture urethra

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    Ravikumar B.R.

    2015-04-01

    Full Text Available To compare the efficacy of sono-urethrogram and ascending urethrogram in the evaluation of stricture urethra. Materials and Methods In this prospective study 40 patients with obstructive lower urinary tract symptoms and suspected to be having stricture urethra were subjected to ascending urethrogram and sonourethrogram. The radiologist was blinded to the findings of ascending urethrogram. All the sonourethrograms were done by the same radiologist. The findings of sonourethrogram & ascending urethrogram were compared with the findings of cystoscopy and intra-operative findings. The specificity, sensitivity,positive predictive value and negative predictive value of each modality in the diagnosis of various urethral anomalies were estimated. Results The sonourethrogram identified stricture disease in all the patients who had abnormal ascending urethrogram. In addition, other abnormalities like spongiofibrosis, diverticula and stones which were not picked up in ascending urethrogram were diagnosed by sonourethrogram. The cystoscopic and intra-operative findings with respect to stricture length, diameter and spongiofibrosis correlated well with sono-urethrogram findings. 5 patients who had stricture in the ascending urethrogram were found to be having the normal urethra in sonourethrogram and confirmed by cystoscopy. Conclusion sonourethrogram is an effective alternative to ascending urethrogram in the evaluation of stricture urethra. It is more sensitive in the diagnosis of anterior urethral strictures than posterior urethral strictures. It is superior to ascending urethrogram in the identification of spongiofibrosis, diameter and length of the stricture. The complications were lower in sonourethrogram group compared to ascending urethrogram.

  1. A comparative study of ascending urethrogram and sono-urethrogram in the evaluation of stricture urethra.

    Science.gov (United States)

    Ravikumar, B R; Tejus, Chiranjeevi; Madappa, K M; Prashant, Dharakh; Dhayanand, G S

    2015-01-01

    To compare the efficacy of sono-urethrogram and ascending urethrogram in the evaluation of stricture urethra. In this prospective study 40 patients with obstructive lower urinary tract symptoms and suspected to be having stricture urethra were subjected to ascending urethrogram and sonourethrogram. The radiologist was blinded to the findings of ascending urethrogram. All the sonourethrograms were done by the same radiologist. The findings of sonourethrogram & ascending urethrogram were compared with the findings of cystoscopy and intra-operative findings. The specificity, sensitivity,positive predictive value and negative predictive value of each modality in the diagnosis of various urethral anomalies were estimated. The sonourethrogram identified stricture disease in all the patients who had abnormal ascending urethrogram. In addition, other abnormalities like spongiofibrosis, diverticula and stones which were not picked up in ascending urethrogram were diagnosed by sonourethrogram. The cystoscopic and intra-operative findings with respect to stricture length, diameter and spongiofibrosis correlated well with sono-urethrogram findings. 5 patients who had stricture in the ascending urethrogram were found to be having the normal urethra in sonourethrogram and confirmed by cystoscopy. sonourethrogram is an effective alternative to ascending urethrogram in the evaluation of stricture urethra. It is more sensitive in the diagnosis of anterior urethral strictures than posterior urethral strictures. It is superior to ascending urethrogram in the identification of spongiofibrosis, diameter and length of the stricture. The complications were lower in sonourethrogram group compared to ascending urethrogram.

  2. Sono, fragilidade e cognição: estudo multicêntrico com idosos brasileiros

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    Ariene Angelini dos Santos

    2013-06-01

    Full Text Available O estudo objetivou analisar a influência conjunta das variáveis antecedentes (idade, gênero, renda, fragilidade e distúrbios de sono sobre a cognição de idosos residentes na comunidade. Trata-se de um recorte do projeto multicêntrico Fragilidade em Idosos Brasileiros (FIBRA. Foram avaliados 878 idosos, utilizando-se questionário sociodemográfico; questões sobre distúrbios de sono (Perfil de Saúde de Nottingham; questões sobre cochilo (Minnesota Leisure Activity Questionnaire e o MEEM (rastreio de alterações cognitivas. Na análise dos dados foram utilizados os testes Mann Whitney e Kruskal Wallis e a análise de regressão univariada e multivariada, com nível de significância de 5% (p<0,05. Os resultados mostraram que os idosos com menor escore do MEEM foram os com menor renda familiar, do sexo feminino e com maior idade. Os profissionais de saúde poderão desenvolver ações preventivas em relação à cognição, mantendo assim a autonomia e independência nas atividades cotidianas desses idosos.

  3. Sono, trabalho e estudo: duração do sono em estudantes trabalhadores e não trabalhadores Sleep, work, and study: sleep duration in working and non-working students

    Directory of Open Access Journals (Sweden)

    Érico Felden Pereira

    2011-05-01

    Full Text Available Este estudo objetivou investigar a duração do sono e fatores associados em escolares trabalhadores e não trabalhadores. Foram coletadas informações sobre o padrão do ciclo vigília/sono de 863 adolescentes de 10 a 19 anos em escolas de São Paulo, Brasil. Análises ajustadas foram aplicadas para comparação da duração do sono entre trabalhadores e não trabalhadores. O porcentual de adolescentes trabalhadores foi de 18,4% e 52% dos jovens que trabalhavam apresentaram oito ou menos horas de sono. A prevalência de baixa duração do sono foi maior nos trabalhadores dos sexos masculino (p = 0,017 e feminino (p The aim of this study was to investigate the duration of sleep and associated factors in working and non-working students. Data were analyzed on the sleep-wake cycle in 863 teenage students in São Paulo, Brazil. Adjusted analyses were performed to compare sleep duration in working and non-working students. 18.4% of the group worked, and 52% of the working students slept eight hours or less per night. Prevalence of short sleep duration was higher in working students of both sexes (males, p = 0.017; females, p < 0.001. Working students showed short sleep duration in the analysis adjusted for socioeconomic status, but short sleep was more frequent in older adolescents (p = 0.004 and in lower (p = 0.001 and middle (p = 0.011 socioeconomic classes. Although more working students were in night school, in the model adjusted for gender and socioeconomic status, working students in afternoon courses showed higher prevalence of short sleep duration (PR = 2.53; 95%CI: 1.68-4.12.

  4. QUALIDADE DE SONO E SUA ASSOCIAÇÃO COM SINTOMAS PSICOLÓGICOS EM ATLETAS ADOLESCENTES

    Directory of Open Access Journals (Sweden)

    Gabriel Cordeiro Gomes

    Full Text Available RESUMO Objetivo: Verificar a prevalência de má qualidade de sono e sua associação com características pessoais e sintomas de depressão, ansiedade e estresse em adolescentes atletas amadores. Métodos: Foram avaliados 309 adolescentes atletas, entre 10 e 19 anos. Para a coleta de dados foram utilizados: questionário estruturado, contendo informações pessoais; Índice de Qualidade do Sono de Pittsburgh (PSQI; e Escala de Ansiedade, Depressão e Stress de 21 itens (EADS-21. Na análise descritiva foram calculados a média e o desvio padrão das variáveis numéricas e as frequências absolutas e relativas das variáveis categóricas. Para a análise inferencial foram realizados teste t de Student e teste do qui-quadrado, além de regressão de Poisson, sendo calculadas as razões de prevalência (RP em um intervalo de confiança de 95% (IC95%. Resultados: A média de idade dos participantes foi de 14,1±2,1, sendo 13,8±2,0 para o grupo de adolescentes com boa qualidade do sono e 15,0±2,1 para o grupo com má qualidade do sono. A má qualidade do sono foi registrada em 28,2% (n=87, a depressão, em 26,9% (n=83 e a ansiedade/estresse, em 40,1% (n=124 da amostra. A má qualidade do sono se associou à faixa etária de 15 a 19 anos (RP 1,24; IC95% 1,14-1,37, a adolescentes com sobrepeso (RP 1,12; IC95% 1,01-1,24 e com sintomas de depressão (RP 1,23; IC95% 1,08-1,40 e de ansiedade/estresse (RP 1,16; IC95% 1,04-1,28. Conclusões: A presença de sobrepeso e sintomas psicológicos, bem como a idade superior a 15 anos, se mostraram fatores de risco para aumentar a chance da má qualidade do sono em adolescentes atletas.

  5. Distúrbios do sono em adultos de uma cidade do Estado de São Paulo

    Directory of Open Access Journals (Sweden)

    Everton Alex Carvalho Zanuto

    2015-03-01

    Full Text Available OBJETIVO: Analisar a ocorrência de distúrbios relacionados ao sono entre adultos de Presidente Prudente, São Paulo, bem como identificar suas associações com variáveis comportamentais, sociodemográficas e de estado nutricional. MÉTODOS: Após a seleção aleatória da amostra, foram realizadas entrevistas face a face com 743 adultos de ambos os sexos, residentes na cidade de Presidente Prudente, São Paulo. Foram aplicados questionários para análise de distúrbios relacionados ao sono, variáveis sociodemográficas (sexo, idade, etnia, escolaridade, comportamentais (atividade física no lazer, etilismo e tabagismo e de estado nutricional. RESULTADOS: Foram observados distúrbios relacionados ao sono em 46,7% da amostra, com intervalo de confiança de 95% (IC95% 43,1 - 50,2. Após a análise multivariada, foi observado que o sexo feminino, com odds ratio (OR = 1,74 (IC95% 1,26 - 2,40, escolaridade (OR = 0,49; IC95% 0,28 - 0,82, sobrepeso (OR = 1,99; IC95% 1,39 - 2,85 e obesidade (OR = 2,90; IC95% 1,94 - 4,35 foram associados à ocorrência de distúrbios relacionados ao sono. CONCLUSÃO: É elevada a ocorrência de distúrbios de sono na amostra analisada, os quais foram mais frequentes em mulheres, pessoas de menor escolaridade e com sobrepeso e obesidade.

  6. Hábitos do sono, estresse e ansiedade de crianças com bruxismo

    OpenAIRE

    Mariana Fernandes Calderan

    2015-01-01

    Ainda não existe consenso sobre os aspectos etiológicos e sinais e sintomas do bruxismo, especialmente em crianças. Poucas são as evidências que demonstraram a relação entre estresse, ansiedade e bruxismo. Além disso, a força de mordida pode ser alterada em pacientes com este tipo de manifestação. O presente estudo teve por objetivos avaliar a relação do bruxismo com: ansiedade, estresse, hábitos do sono, força máxima de mordida, a presença de sinais de DTM, características morfológicas e fun...

  7. estudo comparativo entre sujeitos com boa e má qualidade do sono

    OpenAIRE

    Vicente, Sónia Lisete Pacheco

    2009-01-01

    Dissertação de Mestrado apresentada à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Psicologia, especialização em Psicologia Clínica e da Saúde. Resumo: O Sono é um bem precioso, indispensável a um bom equilíbrio. A vida de cada pessoa é uma série de ritmos que influenciam e regulam a função fisiológica e as respostas comportamentais. Desde muito cedo, é possível transmitir às crianças o prazer de dormir e os bons hábitos. Isto é quase g...

  8. Usefulness of sono-guided needle puncture for MR arthrography of the shoulder

    International Nuclear Information System (INIS)

    Choi, Jae Woong; Hong, Suk Ju; Suh, San Il; Yong, Hwan Suk; Kim, Jung Hyuk; Park, Cheol Min; Suh, Won Hyuck; Kim, Myung Gyu

    2000-01-01

    To evaluate the usefulness of sono-guided needle puncture for MR arthrography of the shoulder to locate the path of access and to control the correct placement of the needle into the shoulder. Fifteen patients with suspicion of shoulder pathology were included in this study. Patients were laid in supine positions with the arm extended and slightly abducted, the palm of the hand facing upward. A sonographic unit with a high resolution transducer with 7.5 MHz linear array was used. Axial images in the anterior aspect of the shoulder were obtained to localize the coracoid process and the anteromedical portion of the humerus. Using an aseptic technique, a 21-guage needle was advanced into the shoulder joint under ultrasonographic guidance. When the needle made contract with the articular cartilage of the humeral head, the needle was tiled to position is point in the articular cavity. Solution of 0.1 ml gadopentetate dimeglumine in 25 ml of normal saline was prepared and 12-16 ml was injected into the joint cavity. The intra-articular position of the needle and the compete distension of the shoulder joint were again confirmed by sonography. The needle was accurately placed in 14 out of 15 patients without damage to neighboring structures. It took 10 to 15 minutes to complete the procedure in 14 patients. No side effects attributable to gadopentetate dimeglumine were found. Sono-guided needle puncture for the shoulder MR arthrography can be a substitutable method for fluoroscopic guidance, with easy access, advantages of lacking radiation hazard and eliminating the need for iodized contrast agents.

  9. Clinical utility of a microbubble-enhancing contrast (“SonoVue”) in treatment of uterine fibroids with high intensity focused ultrasound: A retrospective study

    International Nuclear Information System (INIS)

    Peng, Song; Xiong, Yu; Li, Kequan; He, Min; Deng, Yongbin; Chen, Li; Zou, Min; Chen, Wenzhi; Wang, Zhibiao; He, Jia

    2012-01-01

    Purpose: To evaluate the clinical value of the contrast agent SonoVue in the treatment of uterine fibroids with ultrasound-guided high intensity focused ultrasound (HIFU) therapeutic ablation. Materials and Methods: A total of 291 patients with solitary uterine fibroid from three centers were treated with ultrasound-guided HIFU. Among them, 129 patients from Suining Central Hospital of Sichuan were treated without using SonoVue. 162 patients from the First Hospital of Chongqing Medical University and Chongqing Haifu Hospital were treated with using SonoVue before, during and after HIFU procedure to assess the extent of HIFU. Results: The non-perfused volume (indicative of successful ablation) was observed in all treated uterine fibroids immediately after HIFU ablation; median fractional ablation, defined as non-perfused volume divided by the fibroid volume immediately after HIFU treatment, was 86.0% (range, 28.8–100.0%) in the group with using SonoVue, and 83.0% (8.7–100.0%) without SonoVue. The rate of massive gray scale changes was higher with SonoVue than without the agent. The sonication time to achieve massive gray scale changes was shorter with SonoVue than without. The sonication time for ablating 1 cm 3 of fibroid volume was significantly shorter with using SonoVue than without. No major complications were observed in any patients. Conclusions: Based on our results, SonoVue may enhance the outcome of HIFU ablation and can be used to assess the extent of treatment.

  10. Optimized ONO thickness for multi-level and 2-bit/cell operation for wrapped-select-gate (WSG) SONOS memory

    International Nuclear Information System (INIS)

    Wu, Woei-Cherng; Chao, Tien-Sheng; Yang, Tsung-Yu; Peng, Wu-Chin; Yang, Wen-Luh; Chen, Jian-Hao; Ma, Ming Wen; Lai, Chao-Sung; Lee, Chien-Hsing; Hsieh, Tsung-Min; Liou, Jhyy Cheng; Chen, Tzu Ping; Chen, Chien Hung; Lin, Chih Hung; Chen, Hwi Huang; Ko, Joe

    2008-01-01

    In this paper, highly reliable wrapped-select-gate (WSG) silicon–oxide–nitride–oxide–silicon (SONOS) memory cells with multi-level and 2-bit/cell operation have been successfully demonstrated. The source-side injection mechanism for WSG-SONOS memory with different ONO thickness was thoroughly investigated. The different programming efficiencies of the WSG-SONOS memory under different ONO thicknesses are explained by the lateral electrical field extracted from the simulation results. Furthermore, multi-level storage is easily obtained, and good V TH distribution presented, for the WSG-SONOS memory with optimized ONO thickness. High program/erase speed (10 µs/5 ms) and low programming current (3.5 µA) are used to achieve the multi-level operation with tolerable gate and drain disturbance, negligible second-bit effect, excellent data retention and good endurance performance

  11. Fonoaudiologia X ronco/apneia do sono Speech therapy and snore and sleep apnea

    Directory of Open Access Journals (Sweden)

    Elisângela Barros Soares

    2010-04-01

    Full Text Available TEMA: sendo o sono necessário para termos energia, o ronco e a apneia do sono tornam-se obstáculos que acarretam problemas de saúde, como também problemas sociais, conjugais, escolares, entre outros. OBJETIVO: contribuir para um maior conhecimento do profissional fonoaudiólogo sobre as causas, consequências, diagnóstico e formas de tratamento da apneia obstrutiva do sono (AOS, a fim de favorecer a definição da conduta por este profissional, seja ela, encaminhar para um diagnóstico, tratar (por meio de fonoterapia essa patologia ou indicar o tratamento médico, seja ele, cirúrgico ou conservador. CONCLUSÃO: as possíveis alterações fonoaudiológicas encontradas nestes pacientes são: língua alargada apresentando hipotonia, palato mole com volume aumentado, dificuldade na alimentação devido ao aporte insuficiente de ar e ao bruxismo, possivelmente causado pela tensão e ansiedade decorrentes das noites mal dormidas. Outras alterações podem ser encontradas decorrentes do tratamento cirúrgico empregado em alguns casos, como a disfagia ou até mesmo alterações na fala e na ressonância da fala decorrente de uma uvulopalatoplastia. O enfoque do tratamento fonoaudiológico é a mioterapia dos músculos envolvidos, priorizando a musculatura palatal. Percebe-se que o fonoaudiólogo pode contribuir para amenizar os sintomas encontrados nestas patologias, proporcionando uma qualidade de vida melhor aos seus portadores.BACKGROUND: sleeping is necessary to provide us with energy. However, snoring and sleep apnea become obstacles that cause not only health problems, but also social, marital and educational issues. PURPOSE: contribute with a better understanding of the causes to the speech therapist, as well as the diagnosis and forms of treatment for Obstructive Sleep Apnea (OSA. Facilitate the definition of conduct by the therapist, be it a guide for a diagnosis, a treatment for that disease (through speech therapy or the indication of

  12. TEMPO DE TELA, PERCEPÇÃO DA QUALIDADE DE SONO E EPISÓDIOS DE PARASSONIA EM ADOLESCENTES

    OpenAIRE

    Silva, Alison Oliveira da; Oliveira, Luciano Machado Ferreira Tenório de; Santos, Marcos André Moura dos; Tassitano, Rafael Miranda

    2017-01-01

    RESUMO Introdução: O sono é um importante componente no processo de desenvolvimento biológico e mental das crianças e dos adolescentes, considerado fonte de revitalização das funções orgânicas. Objetivo: Analisar a associação entre o tipo e tempo de exposição à tela, a percepção da qualidade de sono e os episódios de parassonia em adolescentes. Métodos: Estudo transversal que incorpora um levantamento epidemiológico de base escolar com amostra representativa (n = 481) de estudantes (14 a 1...

  13. Sonolência excessiva diurna, apnéia do sono tipo central e distrofia miotônica

    Directory of Open Access Journals (Sweden)

    Rubens Reimão

    1985-12-01

    Full Text Available São relatados dois casos de distrofia miotônica acompanhada de sonolência excessiva diurna. A avaliação polissonográfica de noite inteira revelou grande número de apnéias do sono tipo central deflagrando despertares freqüentes. As apnéias dos tipos obstrutivo e misto ocorreram em níveis normais e não se constatou hipoxia. Houve diminuição da eficiência do sono e redução dos estágios 3, 4 e REM. A apnéia central e a sonolência diurna que acarreta representariam manifestações precoces do comprometimento do sistema nervoso central na distrofia miotônica.

  14. Sono-elastography for Differentiating Benign and Malignant Cervical Lymph Nodes: A Systematic Review and Meta-Analysis

    Science.gov (United States)

    Ghajarzadeh, Mahsa; Mohammadifar, Mehdi; Azarkhish, Kamran; Emami-Razavi, Seyed Hassan

    2014-01-01

    We did this systematic review to determine diagnostic accuracy of sono-elastography in evaluating cervical lymph nodes (LNs). A highly sensitive search for sono-elastography and LNs was performed in MEDLINE, Cochrane Library, ACP Journal Club, EMBASE, Health Technology assessment, and ISI web of knowledge for studies published prior to December 2012. SPSS version 18 (SPSS Inc., Chicago, IL, USA) used for descriptive analysis and meta-disk version 1.4 applied for meta-analysis. Forest plots for pooled estimates and summery of receiver operating characteristic plots for different cut-offs were produced. The literature and manual search yielded 69 articles, of which 10 were eligible to include. A total of 578 individuals with a total number of 936 cervical LNs was evaluated (502 malignant and 434 benign). The summary sensitivity of the scoring and strain ratio (SR) measurements for the differentiation of benign and malignant LNs were 0.76 (95% CI: 0.71–0.8) and 0.83 (95% CI: 0.78–0.87). The summary specificities were 0.8 (95% confidence interval [CI]: 0.75–0.84) and 0.84 (95% CI: 0.79–0.88), respectively. Area under the curve for scoring system was 0.86 (standard error [SE] = 0.03) and 0.95 (SE = 0.02) for SR measurement. Sono-elastograohy has high accuracy in differentiating benign and malignant cervical LNs. PMID:25709787

  15. Sono-elastography for Differentiating Benign and Malignant Cervical Lymph Nodes: A Systematic Review and Meta-Analysis.

    Science.gov (United States)

    Ghajarzadeh, Mahsa; Mohammadifar, Mehdi; Azarkhish, Kamran; Emami-Razavi, Seyed Hassan

    2014-12-01

    We did this systematic review to determine diagnostic accuracy of sono-elastography in evaluating cervical lymph nodes (LNs). A highly sensitive search for sono-elastography and LNs was performed in MEDLINE, Cochrane Library, ACP Journal Club, EMBASE, Health Technology assessment, and ISI web of knowledge for studies published prior to December 2012. SPSS version 18 (SPSS Inc., Chicago, IL, USA) used for descriptive analysis and meta-disk version 1.4 applied for meta-analysis. Forest plots for pooled estimates and summery of receiver operating characteristic plots for different cut-offs were produced. The literature and manual search yielded 69 articles, of which 10 were eligible to include. A total of 578 individuals with a total number of 936 cervical LNs was evaluated (502 malignant and 434 benign). The summary sensitivity of the scoring and strain ratio (SR) measurements for the differentiation of benign and malignant LNs were 0.76 (95% CI: 0.71-0.8) and 0.83 (95% CI: 0.78-0.87). The summary specificities were 0.8 (95% confidence interval [CI]: 0.75-0.84) and 0.84 (95% CI: 0.79-0.88), respectively. Area under the curve for scoring system was 0.86 (standard error [SE] = 0.03) and 0.95 (SE = 0.02) for SR measurement. Sono-elastograohy has high accuracy in differentiating benign and malignant cervical LNs.

  16. [Studies on the degradation of paracetamol in sono-electrochemical oxidation].

    Science.gov (United States)

    Dai, Qi-Zhou; Ma, Wen-Jiao; Shen, Hong; Chen, Jun; Chen, Jian-Meng

    2012-07-01

    A novel lead dioxide electrodes co-doped with rare earth and polytetrafluoroethylene (PTFE) were prepared by the electrode position method and applied as anodes in sono-electrochemical oxidation for pharmaceutical wastewater degradation. The results showed that the APAP removal and the mineralization efficiency reached an obvious increase, which meant that the catalytic efficiency showed a significant improvement in the use of rare-earth doped electrode. The effects of process factors showed that the condition of the electrode had the best degradation efficiency with doped with Ce2O3 under electrolyte concentration of 14.2 g x L(-1), 49.58 W x cm(-2), 50 Hz, pH = 3, 71.43 mA x cm(-2). The APAP of 500 mg x L(-1) removal rate reached 92.20% and its COD and TOC values declined to 79.95% and 58.04%, the current efficiency reached 45.83% after degradation process for 2.0 h. The intermediates were monitored by the methods of GC-MS, HPLC, and IC. The main intermediates of APAP were p-benzoquinone, benzoic acid, acetic acid, maleic acid, oxalic acid, formic acid etc, and the final products were carbon dioxide and water. The goal of completely degradation of pollutant was achieved and a possible degradation way was proposed.

  17. Multi-objective optimization of oxidative desulfurization in a sono-photochemical airlift reactor.

    Science.gov (United States)

    Behin, Jamshid; Farhadian, Negin

    2017-09-01

    Response surface methodology (RSM) was employed to optimize ultrasound/ultraviolet-assisted oxidative desulfurization in an airlift reactor. Ultrasonic waves were incorporated in a novel-geometry reactor to investigate the synergistic effects of sono-chemistry and enhanced gas-liquid mass transfer. Non-hydrotreated kerosene containing sulfur and aromatic compounds was chosen as a case study. Experimental runs were conducted based on a face-centered central composite design and analyzed using RSM. The effects of two categorical factors, i.e., ultrasound and ultraviolet irradiation and two numerical factors, i.e., superficial gas velocity and oxidation time were investigated on two responses, i.e., desulfurization and de-aromatization yields. Two-factor interaction (2FI) polynomial model was developed for the responses and the desirability function associate with overlay graphs was applied to find optimum conditions. The results showed enhancement in desulfurization ability corresponds to more reduction in aromatic content of kerosene in each combination. Based on desirability approach and certain criteria considered for desulfurization/de-aromatization, the optimal desulfurization and de-aromatization yields of 91.7% and 48% were obtained in US/UV/O 3 /H 2 O 2 combination, respectively. Copyright © 2017 Elsevier B.V. All rights reserved.

  18. Oxidative degradation of phenols in sono-Fenton-like systems upon high-frequency ultrasound irradiation

    Science.gov (United States)

    Aseev, D. G.; Sizykh, M. R.; Batoeva, A. A.

    2017-12-01

    The kinetics of oxidative degradation of phenol and chlorophenols upon acoustic cavitation in the megahertz range (1.7 MHz) is studied experimentally in model systems, and the involvement of in situ generated reactive oxygen species (ROSs) is demonstrated. The phenols subjected to high frequency ultrasound (HFUS) are ranked in terms of their rate of conversion: 2,4,6-trichlorophenol > 2,4-dichlorophenol 2-chlorophenol > 4-chlorophenol phenol. Oxidative degradation upon HFUS irradiation is most efficient at low concentrations of pollutants, due to the low steady-state concentrations of the in situ generated ROSs. A dramatic increase is observed in the efficiency of oxidation in several sonochemical oxidative systems (HFUS in combination with other chemical oxidative factors). The system with added Fe2+ (a sono-Fenton system) derives its efficiency from hydrogen peroxide generated in situ as a result of the recombination of OH radicals. The S2O8 2-/Fe2+/HFUS system has a synergetic effect on substrate oxidation that is attributed to a radical chain mechanism. In terms of the oxidation rates, degrees of conversion, and specific energy efficiencies of 4-chlorophenol oxidation based on the amount of oxidized substance per unit of expended energy the considered sonochemical oxidative systems form the series HFUS < S2O8 2-/HFUS < S2O8 2-/Fe2+/HFUS.

  19. IMPLICAÇÕES DOS DISTÚRBIOS RESPIRATÓRIOS DO SONO EM ALUNOS COM DEFICIÊNCIA INTELECTUAL: REVISÃO SISTEMÁTICA

    Directory of Open Access Journals (Sweden)

    Miriam Adalgisa Bedim Godoy

    2017-06-01

    Full Text Available Nos últimos anos, as pesquisas sobre os distúrbios respiratórios do sono em crianças e adolescentes com desenvolvimento típico têm ampliado. As pesquisas constataram que o sono de má qualidade interfere nas competências físicas e intelectivas do ser humano. Como seria a influência desse distúrbio em educandos com deficiência intelectual? O estudo teve por objetivo verificar e analisar nas publicações científicas a influência dos distúrbios respiratórios do sono em escolares com deficiência intelectual. Trata-se um delineamento sistemático de cunho qualitativo. O levantamento foi realizado no período que compreende os anos de 2000 a 2016. Os artigos estavam indexados bases de dados EBSCOhost, DOAJ, ERIC e SciELO Brasil. Os descritores utilizados foram i distúrbios respiratórios do sono e dificuldade de aprendizagem; ii distúrbios respiratórios do sono e deficiência intelectual; iii distúrbios respiratórios do sono e etiologia da deficiência intelectual; iv distúrbios respiratórios do sono e déficit intelectual. A busca também foi realizada em língua inglesa, a saber: i sleep-disordered breathing and learning disability; ii sleep-disordered breathing and Intellectual disability; iii sleep-disordered breathing and Etiology intellectual disability; iv sleep-disordered breathing and Intellectual deficit. Com base nesses descritores, foram encontradas 43 pesquisas. Entretanto, considerando-se os requisitos elegidos para este estudo, apenas sete artigos compuseram o corpus final de análise. Desses, quatro eram estudos experimentais, dois de revisões de literatura e um do tipo longitudinal. As pesquisas revelaram que a influência dos distúrbios do sono junto às crianças e aos adolescentes com deficiência intelectual é recente e limitada, porém, tais distúrbios respiratórios do sono interferem significativamente na qualidade de vida, bem como nos aspectos de desenvolvimento e aprendizagem dos alunos com defici

  20. Melhora da dor, do cansaço e da qualidade subjetiva do sono por meio de orientações de higiene do sono em pacientes com fibromialgia Improvement in pain, fatigue, and subjective sleep quality through sleep hygiene tips in patients with fibromyalgia

    OpenAIRE

    Aline Cristina Orlandi; Camila Ventura; Andrea Lopes Gallinaro; Renata Alqualo Costa; Laís Verderame Lage

    2012-01-01

    OBJETIVO: Avaliar a efetividade das orientações para higiene do sono em mulheres portadoras de fibromialgia. MATERIAIS E MÉTODOS: Setenta mulheres completaram o estudo. Na avaliação foram aplicados o Questionário de Impacto da Fibromialgia(FIQ), o Índice de Qualidade do Sono de Pittsburgh (PSQI) e um questionário geral, com dados pessoais e informações de hábitos de vida. Todas as pacientes receberam informações quanto à doença, além de um diário do sono, e apenas o grupo-experimental recebeu...

  1. Estudo do sono e função pulmonar em pacientes obesos mórbidos

    Directory of Open Access Journals (Sweden)

    Isabella de Carvalho Aguiar

    Full Text Available INTRODUÇÃO: A obesidade acarreta uma série de alterações na fisiologia respiratória e no sono. Seu tratamento tem como objetivo a melhora da saúde e da qualidade de vida. OBJETIVO: Avaliar a função pulmonar e o sono em indivíduos obesos mórbidos pré-cirurgia bariátrica. MATERIAIS E MÉTODOS: Participaram deste estudo 38 pacientes, recrutados em dois serviços de cirurgia bariátrica e encaminhados ao Laboratório de Sono da Universidade Nove de Julho, São Paulo, Brasil. Os critérios de inclusão foram: obesos mórbidos, IMC entre 40 kg/m² e 50 kg/m² e IMC entre 35 kg/m² a 39,9 kg/m² se associados a comorbidades. RESULTADOS: A média de idade foi de 42 ± 10, o índice de massa corpórea médio foi de 50,09 ± 7,64. A média da circunferência abdominal foi de 132,48 ±11,07 e 134,31 ± 16,26 e de pescoço foi 42,34 ± 2,08 e 44,48 ± 3,67, respectivamente para mulheres e homens. As pressões máximas inspiratórias foram 57,57 ± 18,93 e 60,6 ± 3,72 e máximas expiratórias 56,63 ± 16,68 e 60 ± 18,52, para mulheres e homens respectivamente. O sono do movimento rápido dos olhos apresentou-se com média de 16,93 ± 13,61 e a saturação mínima da oxi-hemoglobina foi de 79,33 ± 10,26 durante o sono. Em 44,74% dos casos examinados, foram observadas alterações na Escala de Sonolência de Epworth (ESE; e em 76,3% ficou confirmada a presença de síndrome da apneia obstrutiva do sono (SAOS. CONCLUSÃO: Foram observadas alterações nas pressões máximas ventilatórias, na estrutura do sono associadas a considerável dessaturação noturna da oxi-hemoglobina, o que evidencia alta prevalência de SAOS nos pacientes obesos mórbidos.

  2. Sono-electro-magnetic therapy for treating chronic pelvic pain syndrome in men: a randomized, placebo-controlled, double-blind trial.

    Science.gov (United States)

    Kessler, Thomas M; Mordasini, Livio; Weisstanner, Christian; Jüni, Peter; da Costa, Bruno R; Wiest, Roland; Thalmann, George N

    2014-01-01

    To assess the efficacy and safety of sono-electro-magnetic therapy compared to placebo in men with refractory CPPS. In a randomized, placebo-controlled, double-blind single center trial, we assessed the effect of sono-electro-magnetic therapy in men with treatment refractory CPPS. Sixty male patients were randomly assigned to treatment with either sono-electro-magnetic (n = 30) or placebo therapy (n = 30) for 12 weeks. The primary outcome was a change in the National Institutes of Health Chronic Prostatitis Symptom Index (NIH-CPSI) from baseline to 12 weeks. The 12-week difference between sono-electro-magnetic and placebo therapy in changes of the NIH-CPSI total score was -3.1 points (95% CI -6.8 to 0.6, p = 0.11). In secondary comparisons of NIH-CPSI sub-scores, we found differences between groups most pronounced for the quality-of-life sub-score (difference at 12 weeks -1.6, 95% CI -2.8 to -0.4, p = 0.015). In stratified analyses, the benefit of sono-electro-magnetic therapy appeared more pronounced among patients who had a symptom duration of 12 months or less (difference in NIH-CPSI total score -8.3, 95% CI -14.5 to 2.6) than in patients with a longer symptom duration (-0.8, 95% CI -4.6 to 3.1; p for interaction = 0.023). Sono-electro-magnetic therapy did not result in a significant improvement of symptoms in the overall cohort of treatment refractory CPPS patients compared to placebo treatment. Subgroup analysis indicates, however, that patients with a symptom-duration of 12 months or less may benefit from sono-electro-magnetic therapy, warranting larger randomized controlled trials in this subpopulation. ClinicalTrials.gov NCT00688506.

  3. Apneia obstrutiva do sono em crianças Obstructive sleep apnea in children

    Directory of Open Access Journals (Sweden)

    Simone Chaves Fagondes

    2010-06-01

    Full Text Available Em crianças, SAOS é caracterizada por episódios recorrentes de obstrução parcial ou completa das vias aéreas superiores durante o sono. Caracteriza-se por um continuum que vai desde o ronco primário (uma situação benigna de ronco sem alterações fisiológicas e complicações associadas, passando por resistência aumentada das vias aéreas, hipoventilação obstrutiva e, finalmente, SAOS. A prevalência de ronco é elevada e, dependendo da forma como ele é definido, varia entre 1,5% e 15%. O diagnóstico da SAOS, combinando questionários de relatos dos pais e exames complementares, apresenta uma prevalência de 1-4%. A SAOS é mais frequente nos meninos, nas crianças com sobrepeso, de ascendência africana, com história de atopia e prematuridade. Ronco alto e frequente, apneias observadas pelos familiares e sono agitado são os sintomas mais frequentes. O exame físico deve identificar a situação ponderostatural do paciente, avaliar evidências de obstrução crônica das vias aéreas superiores e ainda verificar a presença de alterações craniofaciais. A polissonografia de noite inteira é o exame padrão tanto para o diagnóstico, como para a definição da pressão necessária em equipamentos de pressão positiva e também para a avaliação do tratamento cirúrgico. A hipóxia intermitente e os múltiplos despertares resultantes dos eventos obstrutivos contribuem para as consequências cardiovasculares, neurocognitivas e comportamentais bem descritos nesses pacientes. A adenoamigdalectomia é o principal tratamento para a SAOS em crianças. O uso da pressão positiva nas vias aéreas (CPAP ou Bilevel é outra opção de uso crescente na população pediátrica.Childhood obstructive sleep apnea syndrome (OSAS is characterized by recurrent episodes of partial or complete upper airway obstruction during sleep. The disease encompasses a continuum from primary snoring (a benign condition without physiological alterations or

  4. Sleep apnea and REM sleep behavior disorder in patients with Chiari malformations Apnéia do sono e distúrbio do comportamento da fase do sono com REM em pacientes com malformações de Chiari

    Directory of Open Access Journals (Sweden)

    Paulo Sérgio A. Henriques-Filho

    2008-06-01

    Full Text Available BACKGROUND: Chiari malformations (CM may result in the appearance of REM sleep behavior disorder (RBD and sleep apnea syndrome (SAS that can be considered markers of brain stem dysfunction. PURPOSE: To evaluate the frequency of RBD and SAS in patients with CM type I and II. METHOD: Were evaluated 103 patients with CM by means of full night polysomnography. Were scoring different sleep stages, frequency of abnormal movements (through video monitoring and abnormal respiratory events. RESULTS: Of the 103 patients, 36 showed CM type I and 67 CM type II. Episodes of RBD were observed in 23 patients. Abnormal apnea-hypopnea index (AHI was observed in 65 patients. CONCLUSION: The high rate of RBD suggests that this parassomnia and the increased frequency of central sleep apnea episodes, may be considered as a marker of progressive brain stem dysfunction.INTRODUÇÃO: Malformações de Chiari (MC podem gerar o aparecimento de distúrbio comportamental da fase do sono com REM (DCR e síndrome da apnéia do sono (SAS, sugerindo a ocorrência de disfunção do tronco cerebral. OBJETIVO: Avaliar a freqüência de DCR e SAS em pacientes com MC I ou II. MÉTODO: Utilizou-se a polissonografia de noite inteira para a avaliação de 103 pacientes. Classificaram-se as diferentes fases do sono e analisou-se a freqüência de movimentos anormais (monitorada por vídeo e de eventos respiratórios anormais. RESULTADOS: Dos 103 pacientes analisados, 36 eram portadores de MC I e 67 de MC II. Episódios de DCR foram observados em 23 pacientes. O índice de apnéia/hipopnéia foi considerado anormal em 65 pacientes. CONCLUSÃO: A alta freqüência de DCR e o aumento da freqüência de episódios de apnéia central do sono podem ser considerados manifestação de disfunção progressiva do tronco cerebral.

  5. Morbilidade psicológica, qualidade do sono, e suporte social nos portadores de diabetes mellitus tipo 2

    OpenAIRE

    Costa, Elisabete Miranda Gomes

    2013-01-01

    Para levar a cabo este estudo foram aplicados além de um Questionário Sócio – Demográfico, (adaptada da versão de Sousa & McIntyre , 2002) para caracterização da amostra; a Escala Hospitalar de Ansiedade Depressão (HADS), (Zigmond & Snaith, 1983;versão portuguesa adaptada por Pais-Ribeiro, Silva, Ferreira, Martins, Meneses & Baltar,2007) para avaliar os índices de ansiedade e depressão; Índice de Qualidade do Sono Pittsburgh (PSQI) (Buysse, Reynolds, Monk, Berman & Kupfer, 1989; versão portug...

  6. The relationship between shift work and sleep patterns in nurses Relação entre trabalho por turnos e padrões de sono em enfermeiros

    Directory of Open Access Journals (Sweden)

    Manuel Fernando dos Santos Barbosa

    2013-03-01

    Full Text Available The scope of this study was to evaluate the sleep/wake cycle in shift work nurses, as well as their sleep quality and chronotype. The sleep/wake cycle was evaluated by keeping a sleep diary for a total of 60 nurses with a mean age of 31.76 years. The Horne & Östberg Questionnaire (1976 for the chronotype and the Pittsburgh Sleep Quality Index (PSQI for sleep quality were applied. The results revealed a predominance of indifferent chronotypes (65.0%, followed by moderately evening persons (18.3%, decidedly evening persons (8.3%, moderately morning persons (6.6% and decidedly morning persons (1.8%. The sleep quality perception was analyzed by the visual analogical scale, showing a mean score of 5.85 points for nighttime sleep and 4.70 points for daytime sleep, which represented a statistically significant difference. The sleep/wake schedule was also statistically different when considering weekdays and weekends. The PSQI showed a mean of 7.0 points, characterizing poor sleep quality. The results showed poor sleep quality in shift work nurses, possibly due to the lack of sport and shift work habits.Este estudo teve como objectivo analisar o ciclo vigília-sono em enfermeiros que trabalham por turnos, bem como a qualidade do sono e cronótipo. O ciclo vigília-sono foi avaliado através do diário de sono, num total de 60 enfermeiros, com idade média de 31.76 anos. Para o cronótipo utilizou-se o Questionário de Horne e Östberg, de 1976, e para medir a qualidade de sono calculou-se o Índice Qualidade de Sono de Pittsburg (PSQI. Os resultados do cronótipo mostraram uma predominância para tipo indiferente (65.0%, seguido do tipo Moderamente Vespertinos (18.3%, Definitivamente Vespertino (8.3%, Moderadamente Matutinos (6.6% e Definitivamente Matutinos (1.8%. A percepção da qualidade do sono autorreportada pela Escala Analógica Visual (VAS foi de 5.85 pontos, em média, para o sono nocturno e 4.70 para o sono diurno, diferen

  7. Efeito de uma sessão de treinamento de força sobre a qualidade do sono de adolescentes

    OpenAIRE

    Santiago, Ladyodeyse da Cunha Silva; Lyra, Maria Julia; Cunha Filho, Moacyr; Cruz, Pedro Weldes da Silva; Santos, Marcos André Moura dos; Falcão, Ana Patrícia Siqueira Tavares

    2015-01-01

    INTRODUÇÃO: o sono é uma função biológica fundamental para a conservação da energia e a restauração do metabolismo energético.OBJETIVO: analisar o efeito de uma sessão do treinamento de força realizada em diferentes horários sobre a qualidade do sono de adolescentes e examinar se a relação entre a melhoria da qualidade do sono e o horário da sessão de treino se altera após o ajuste para idade.MÉTODOS: participaram do estudo seis estudantes do sexo masculino moradores internos do IFPE - Campus...

  8. Avaliação de um modelo de predição para apneia do sono em pacientes submetidos a polissonografia

    OpenAIRE

    Musman,Silvio; Passos,Valéria Maria de Azeredo; Silva,Izabella Barreto Romualdo; Barreto,Sandhi Maria

    2011-01-01

    OBJETIVO: Testar um modelo de predição para apneia do sono a partir de variáveis sociodemográficas e clínicas em uma população com suspeita de distúrbio do sono e submetida à polissonografia. MÉTODOS: Foram incluídos no estudo 323 pacientes consecutivos submetidos à polissonografia por suspeita clínica de distúrbio do sono. Utilizou-se um questionário com questões sociodemográficas e a escala de sonolência de Epworth. Foram medidos pressão arterial, peso, altura e SpO2. A regressão linear múl...

  9. ÍNDICE DA QUALIDADE DO SONO DE PITTSBURGH PARA USO NA REABILITAÇÃO CARDIOPULMONAR E METABÓLICA

    Directory of Open Access Journals (Sweden)

    Pablo Antonio Bertasso de Araujo

    2015-12-01

    Full Text Available Introdução A qualidade do sono constitui-se em parâmetro relevante na avaliação da saúde em geral, sendo um fator relevante na determinação do risco das doenças cardiovasculares. Objetivo Validar a versão adaptada do questionário de avaliação do Índice de Qualidade do Sono de Pittsburgh (PSQI para uso em programas de reabilitação cardiopulmonar e metabólica (RCPM. Métodos Estudo descritivo transversal realizado com 101 pacientes de ambos os sexos, com média de idade de 66,05 (± 13,9 anos. Para a análise estatística foi considerado intervalo de confiança de 95% e valor de significância p <0,05; para a análise de consistência interna foi utilizado o coeficiente de alfa de Cronbach e para a análise da relação entre componentes e itens com o escore total do questionário foi utilizado o coeficiente de correlação de Spearman. Resultados Todos os componentes do questionário apresentaram boa consistência interna com valor de 0,72. Os componentes que mais se relacionaram com o escore total foram "duração do sono" e "qualidade subjetiva do sono", sendo que o componente que menos se relacionou foi "alterações do sono". Dentre os itens a variação foi de 0,584 no item "durante a última semana, em geral, como você classificaria a qualidade do seu sono?", até -0,611 no item "durante a última semana, quantas horas você conseguia dormir durante a noite?". Foi possível observar que os itens "tossir ou roncar muito alto" e "frequência para dificuldades do sono por outras razões" não apresentaram correlação com o escore total do questionário. Conclusão A versão adaptada do PSQI mostrou-se válida para ser utilizada na avaliação do sono em programas de RCPM.

  10. A qualidade do sono, o aproveitamento escolar e o stress em adolescentes que permacem em frente ao computador durante a noite

    OpenAIRE

    Gema Galgani de Mesquita Duarte

    2007-01-01

    Resumo: A qualidade do sono, o aproveitamento escolar e o stress em adolescentes que permanecem em frente ao computador durante a noite. 2007. 234p. Professor Doutor Rubens Nelson Amaral de Assis Reimão. Dissertação (Mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas, Departamento da Saúde da Criança e do Adolescente. INTRODUÇÃO: O sono representa importante papel na vida do homem, influenciando as condições físicas, psicológicas e sociais. Está intimamente ligado ao...

  11. Sono-vigília, aspectos de memória e melatonina em Síndrome de Williams-Beuren: uma revisão de literatura

    Directory of Open Access Journals (Sweden)

    Stella Donadon Santoro

    2014-12-01

    Full Text Available A Síndrome de Williams-Beuren, distúrbio genético (microdeleção na região cromossômica 7q11.23, apresenta como fenótipo aparente habilidade social que contrasta com o mau funcionamento cognitivo global e visuo-espacial, problemas na forma receptiva, estrutural e semântica da comunicação, além de déficits na atenção, hiperatividade e na memória visuoespacial. Outra caracteristica são desordens no ciclo sono-vigília, com sono ineficaz, resistência em ir para a cama, acordares durante a noite e sonolência durante o dia. Uma possibilidade ainda não explorada nesta síndrome seria o padrão anormal na síntese de melatonina, hormônio capaz de modular a qualidade do sono. Considerando que a qualidade do sono é diretamente influenciada pelos níveis de melatonina e que tanto a melatonina quanto o sono são essenciais para o desenvolvimento adequado das funções cognitivas, buscou-se nesta revisão de literatura quais estudos investigaram separadamente e ou correlacionaram estes três aspectos (melatonina, sono-vigília e memória na síndrome de Williams-Beuren. Para busca, foram utilizadas as bases de dados Medline/Pubmed, SciELO e Lilacs, com os seguintes descritores: "Williams Beuren syndrome, síndrome de Williams Beuren, memory, memória, sleep-wake, sono-vigília, melatonin e melatonina", por meio de cruzamento e com o conectivo AND. O levantamento bibliográfico mostrou que não existem na literatura trabalhos que correlacionaram estas três variáveis entre si nem tampouco trabalhos que investigaram a melatonina na síndrome de Williams-Beuren. As investigações sobre sono assim como as investigações sobre memória são criticamente discutidas neste trabalho que ressalta a necessidade de estudos que correlacionem estes parâmetros, bem como outros fatores comportamentais, cognitivos e bioquímicos a eles relacionados.

  12. Thermoluminescence and photoluminescence properties of NaCl:Mn, NaCL:Cu nano-particles produced using co-precipitation and sono-chemistry methods

    Energy Technology Data Exchange (ETDEWEB)

    Mehrabi, M. [Faculty of Physics, University of Kashan, Kashan (Iran, Islamic Republic of); Zahedifar, M. [Faculty of Physics, University of Kashan, Kashan (Iran, Islamic Republic of); Institute of Nanosince and Nanotechnology, University of Kashan, Kashan (Iran, Islamic Republic of); Saeidi-Sogh, Z. [Institute of Nanosince and Nanotechnology, University of Kashan, Kashan (Iran, Islamic Republic of); Ramazani-Moghaddam-Arani, A., E-mail: ramazmo@kashanu.ac.ir [Institute of Nanosince and Nanotechnology, University of Kashan, Kashan (Iran, Islamic Republic of); Sadeghi, E. [Faculty of Physics, University of Kashan, Kashan (Iran, Islamic Republic of); Institute of Nanosince and Nanotechnology, University of Kashan, Kashan (Iran, Islamic Republic of); Harooni, S. [Institute of Nanosince and Nanotechnology, University of Kashan, Kashan (Iran, Islamic Republic of)

    2017-02-21

    The NaCl: Cu and NaCl: Mn nanoparticles (NPs) were produced by co-precipitation and sono-chemistry methods and their thermoluminescence (TL) and photoluminescence (PL) properties were studied. By decreasing the particles size a considerable increase in sensitivity of the samples to high dose gamma radiation was observed. The NPs produced by sono-chemistry method have smaller size, homogeneous structure, more sensitivity to high gamma radiation and less fading than of those produced by co-precipitation method.

  13. A Síndrome da Apneia/Hipopneia Obstrutiva do Sono (SAHOS) e seu tratamento com cirurgia ortognática

    OpenAIRE

    Faria, Cindy

    2013-01-01

    Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária A Síndrome da Apneia/Hipopneia Obstrutiva do Sono (SAHOS) é uma síndrome com grande prevalência na sociedade actual, constituíndo um grande problema de saúde pública. A SAHOS ocorre pelo repetido estreitamento ou colapso das vias aéreas superiores (VAS) durante o sono provocando como principal síntoma uma hipersonolência diurna exess...

  14. Privação de sono REM em um modelo experimental da doença de Parkinson

    Directory of Open Access Journals (Sweden)

    Luiz A. F. Andrade

    1987-09-01

    Full Text Available Investigação prévia mostrou que ratos privados de sono (REM SD mostram acentuação de resposta a agonistas dopaminérgicos. As evidências indicam que essa ação parece ser mediada por supersensibilização de receptores dopaminérgicos pós-sinápticos. Com base nisso, foi feita REM SD em ratos com modelo experimental da doença de Parkinson, nos quais foi feita lesão eletrolítica bilateral de ambas as vias nigro-estriatais. Sete dias após a cirurgia os animais eram submetidos a REM SD por 72 horas. Imediatamente após o final deste período era feita observação em campo aberto para a ambulação, "rearing", "grooming" e latência. Em comparação com ratos não-privados foi observado aumento significativo na ambulação e "rearing", resposta que reapareceu após um segundo período de REM SD, realizado 21 dias após a cirurgia. Estes dados, de melhora de dois parâmetros de modelo experimental da doença de Parkinson, sugerem que a privação de sono pode ser útil nesta doença.

  15. Surface Charge Measurement of SonoVue, Definity and Optison: A Comparison of Laser Doppler Electrophoresis and Micro-Electrophoresis.

    Science.gov (United States)

    Ja'afar, Fairuzeta; Leow, Chee Hau; Garbin, Valeria; Sennoga, Charles A; Tang, Meng-Xing; Seddon, John M

    2015-11-01

    Microbubble (MB) contrast-enhanced ultrasonography is a promising tool for targeted molecular imaging. It is important to determine the MB surface charge accurately as it affects the MB interactions with cell membranes. In this article, we report the surface charge measurement of SonoVue, Definity and Optison. We compare the performance of the widely used laser Doppler electrophoresis with an in-house micro-electrophoresis system. By optically tracking MB electrophoretic velocity in a microchannel, we determined the zeta potentials of MB samples. Using micro-electrophoresis, we obtained zeta potential values for SonoVue, Definity and Optison of -28.3, -4.2 and -9.5 mV, with relative standard deviations of 5%, 48% and 8%, respectively. In comparison, laser Doppler electrophoresis gave -8.7, +0.7 and +15.8 mV with relative standard deviations of 330%, 29,000% and 130%, respectively. We found that the reliability of laser Doppler electrophoresis is compromised by MB buoyancy. Micro-electrophoresis determined zeta potential values with a 10-fold improvement in relative standard deviation. Copyright © 2015 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved.

  16. Comparison of needles size in pediatric renal biopsy with sono-guided percutaneous-automated gun technique

    International Nuclear Information System (INIS)

    Kim, Jong Chul; Park, Jin Yong

    1997-01-01

    To compare the efficacy of a 20-gauge and an 18-gauge needle in sono-guided percutaneous automated gun biopsy for establishing the specific diagnosis of renal parenchymal disease in pediatric kidneys. In 60 pediatric patients with renal parenchymal diseases, percutaneous sono-guided gun biopsy was performed by an experienced radiologist. In two groups of 30 patients, regardless of their age, two needle passes were performed, using alternately an 18-gauge or a 20-gauge biopsy needle. The core of renal tissue thus obtained was examined with light, immunofluorescent or electron microscopy by the renal pathologist. The mean number of intact glomeruli of whole tissue core per biopsy, as seen on the light microscopy, and post-bioptic complications were compared between the two different needle size groups. The number (mean±1 standard deviation) of glomeruli obtained per biopsy was 17±8 in the 18-gauge needle group, and 14±5 in the 20-gauge group. Between two groups, there was no major post-bioptic complication requiring specific treatment, nor a statistically significant difference in the frequency of minor complications. Even though more glomeruli were obtained with an 18-gauge needle, the number obtained with a 20-gauge needle also permitted adequate pathologic examination. Both an 18-gauge and a 20-gauge needle may thus be suitable for renal biopsy in pediatric patients

  17. Ecocardiografia em pacientes com apneia do sono grave com e sem pressão arterial controlada: Estudo transversal

    Directory of Open Access Journals (Sweden)

    Denis Martinez

    2016-01-01

    Full Text Available Introdução: A apneia obstrutiva do sono (AOS afeta a anatomia e função do coração. Ocorre hipertensão arterial em metade dos casos de AOS, dificultando atribuir a etiologia dessas alterações separadamente à hipertensão arterial ou à apneia do sono. Métodos: Estudo transversal de pacientes com índice de apneia-hipopneia maior que 50 eventos por hora. As variáveis ecocardiográficas comparadas em indivíduos com hipertensão arterial controlada e não controlada foram: 1 fração de ejeção, 2 diâmetro da aorta, 3 diâmetro do átrio esquerdo, 4 diâmetro de ventrículo direito, 5 diâmetros do ventrículo esquerdo diastólico e sistólico, 6 percentagem delta, 7 espessura do septo, 8 espessura da parede posterior. Resultados: Foram incluídos 83 voluntários, 50 com pressão arterial não controlada. Em média, a idade era 47±9,5 anos, o índice de massa corporal 34±5,4 Kg/m2, o índice de apneia-hipopneia 86±18 eventos/hora. Sessenta pacientes apresentaram anormalidade no ecocardiograma. A hipertrofia de ventrículo esquerdo foi o achado mais comum, sem diferença de frequência em controles (39% e em hipertensos (48%, seguida por disfunção diastólica em controles (27% e em hipertensos (32%. Conclusões: Indivíduos com apneia do sono grave e pressão arterial controlada apresentam alterações no ecocardiograma de tipo e frequência semelhantes aos com hipertensão não controlada. Isso sugere que a apneia do sono pode causar dano cardíaco independentemente de hipertensão. Quando não explicáveis por hipertensão arterial, achados como hipertrofia de ventrículo esquerdo podem ser provocados por apneia do sono.   Introduction:  Obstructive sleep apnea (OSA affects the cardiac anatomy and function. Hypertension occurs in half the OSA cases, making it difficult to attribute the cause of these changes separately to arterial hypertension or sleep apnea. Methods: Prospective cross-sectional study of volunteers with apnea

  18. Consenso brasileiro de ronco e apneia do sono: aspectos de interesse aos ortodontistas Brazilian consensus of snoring and sleep apnea: aspects of interest for orthodontists

    Directory of Open Access Journals (Sweden)

    Cauby Maia Chaves Junior

    2011-02-01

    Full Text Available O objetivo deste artigo é explicitar o posicionamento das sociedades médicas que, reunidas, estabeleceram consenso sobre os parâmetros clínico-laboratoriais que envolvem os distúrbios respiratórios do sono, em especial o ronco e a síndrome da apneia obstrutiva do sono (SAOS. Os ortodontistas, que vêm ocupando gradativamente seu espaço em equipes multidisciplinares que atuam na área do sono humano, pouco conhecem sobre essa uniformização coordenada pela Associação Brasileira de Sono. Os trabalhos clínicos e as pesquisas científicas oriundos da Odontologia, e em particular da Ortodontia, também devem observar e seguir esses critérios de diagnóstico e tratamento estabelecidos pela comunidade médica brasileira.The objective of this article is to clarify the positions of the medical societies that have worked together to establish a consensus regarding the clinical and laboratory parameters involved in sleep-disordered breathing, particularly snoring and obstructive sleep apnea syndrome (OSAS. Orthodontists have gradually come to take part in multidisciplinary teams that act in the area of human sleep, but few know about the uniformity coordinated by the Brazilian Association of Sleep. Clinical and scientific studies from the field of dentistry (particularly orthodontics also must observe and follow these diagnosis and treatment criteria established by the Brazilian medical community.

  19. Fonoaudiologia e apneia do sono: uma revisão Speech therapy and sleepy apnae: a review

    Directory of Open Access Journals (Sweden)

    Erilucia Pereira Santa Rosa

    2010-10-01

    Full Text Available TEMA: a Síndrome da Apneia/Hipopneia Obstrutiva do Sono (SAHOS é definida pela Academia Americana do Sono como a presença de episódios recorrentes de obstrução parcial ou total das vias aéreas superiores durante o sono e manifesta-se como uma redução (hipopneia ou cessação completa (apneia do fluxo aéreo, apesar da manutenção dos esforços inspiratórios. A SAHOS motiva o chamado ronco crônico, sonolência e caracteriza-se pela parada do fluxo aéreo respiratório por pelo menos, 10 segundos. O diagnóstico é realizado através do exame polissonográfico, que consiste no registro simultâneo de atividades do organismo durante a noite, indicando a quantidade de apneias e hipopneias ocorridos e a gravidade da SAHOS. Para sucesso no tratamento desta desordem é fundamental o diagnóstico preciso e correto e a atuação de uma equipe multidisciplinar, estando inserido nela o fonoaudiólogo. OBJETIVO: analisar, através da literatura a interrrelação da Fonoaudiologia e a SAHOS. CONCLUSÃO: aom o referente estudo, podemos identificar a complexidade da SAHOS e mostrar a importância da atuação fonoaudiológica na terapêutica desses pacientes, para uma melhor qualidade de vida.BACKGROUND: the Apnea syndrome / Obstructive Sleepy Hypopnea (SOHAS is define by the American Academy of Sleep with recurrent presence of episodes of partial or total obstruction in the superior airways during sleep, in addition to showing a reduction (hypopnea or complete stoppage (apnea of airflow, although there is an ongoing maintenance of inspiratory efforts. SOHAS motivates the so-called sleepy chronic snoring and sleepiness to dress up by the stop of airflow by at least 10 seconds. The diagnosis is carried out through polysomnographic examination, which consists of the simultaneous recording of body activities during the night, indicating the number of occurring apneas and hypopneas and SOHAS severity. For the successful of disorder treatment it is

  20. Sono-electro-magnetic therapy for treating chronic pelvic pain syndrome in men: a randomized, placebo-controlled, double-blind trial.

    Directory of Open Access Journals (Sweden)

    Thomas M Kessler

    Full Text Available OBJECTIVE: To assess the efficacy and safety of sono-electro-magnetic therapy compared to placebo in men with refractory CPPS. PATIENTS AND METHODS: In a randomized, placebo-controlled, double-blind single center trial, we assessed the effect of sono-electro-magnetic therapy in men with treatment refractory CPPS. Sixty male patients were randomly assigned to treatment with either sono-electro-magnetic (n = 30 or placebo therapy (n = 30 for 12 weeks. The primary outcome was a change in the National Institutes of Health Chronic Prostatitis Symptom Index (NIH-CPSI from baseline to 12 weeks. RESULTS: The 12-week difference between sono-electro-magnetic and placebo therapy in changes of the NIH-CPSI total score was -3.1 points (95% CI -6.8 to 0.6, p = 0.11. In secondary comparisons of NIH-CPSI sub-scores, we found differences between groups most pronounced for the quality-of-life sub-score (difference at 12 weeks -1.6, 95% CI -2.8 to -0.4, p = 0.015. In stratified analyses, the benefit of sono-electro-magnetic therapy appeared more pronounced among patients who had a symptom duration of 12 months or less (difference in NIH-CPSI total score -8.3, 95% CI -14.5 to 2.6 than in patients with a longer symptom duration (-0.8, 95% CI -4.6 to 3.1; p for interaction = 0.023. CONCLUSIONS: Sono-electro-magnetic therapy did not result in a significant improvement of symptoms in the overall cohort of treatment refractory CPPS patients compared to placebo treatment. Subgroup analysis indicates, however, that patients with a symptom-duration of 12 months or less may benefit from sono-electro-magnetic therapy, warranting larger randomized controlled trials in this subpopulation. TRIAL REGISTRATION: ClinicalTrials.gov NCT00688506.

  1. Avaliação da relação entre qualidade de sono e uma intervenção com jogos para o desempenho de crianças e adolescentes

    OpenAIRE

    Araújo, Danilo de Freitas

    2012-01-01

    O sono é um processo cerebral ativo que contribui para a realização eficiente das tarefas cotidianas. Mudanças em seu padrão podem influenciar o desempenho de diversos processos cognitivos. Vários estudos recentes têm demonstrado a possibilidade de melhora do desempenho cognitivo, a partir do treinamento cognitivo com o uso de jogos de computador. A questão é se tais intervenções podem ser influenciadas também pela qualidade do sono. Assim, avaliamos o efeito da qualidade do sono sobre ...

  2. Experimentation to seek the local speciality in kWh of P.V. system, and a study of its measuring method and instruments and apparatus; Taiyoko hatsuden system no jibetsu hatsudenryo no chiiki tokusei wo motomeru jissho shiken narabini, sono sokutei kansoku no hoho kiki ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Anno, T.

    1997-11-25

    Introduced in this paper are some problems that the author encounters in relation with a 2.6kW photovoltaic power generation system installed at the author`s residence for the purpose of measuring the hourly amounts of generated power. Giving rise to questions in the inverter and the control system are the conversion efficiency under a partial load, the scope of little amounts that are omitted, the maximum power point tracking system and its performance, etc. The author wants to learn how to land on an appropriate conductor thickness and to know the special specifications if any for heavy-snow regions and their effect. Much has been learned from presenters, moderators, and participants at scientific events and through private talks. Although it seems that there exists some relationship between the maximum power point tracking system and the diameter of conductors suitable for the system, yet the manufacturers fail to give clear-cut answers. The author thinks that end-users find many black box-like parts in the system, which the author leaves uncared for now for later study. It is learned that there is no specification intended exclusively for heavy-snow regions. The author`s system is in operation with hourly output recording and data accumulation started. 2 figs.

  3. Effects of elasticity on the damping characteristics of viscous shearing damper and estimation curve for modal damping in stay cables with this type of dampers. Cable seishin'yo nensei sendangata damper no gensui fuka tokusei ni oyobosu banegosei no eikyo to sono sekkeiyo gensui hyoka kyokusen

    Energy Technology Data Exchange (ETDEWEB)

    Yoneda, M. (Kawada Industries Inc., Tokyo (Japan)); Shimoda, I. (Oiles Corp., Tokyo (Japan))

    1993-12-20

    Oil dampers and viscous shearing dampers have been used to control wind-induced cable vibrations of cable-stayed bridges. The damping addition efficiency in the case where only damping force of the viscous shearing damper is considered was discussed in the previous paper. In this paper, more precise estimation is done by also considering the spring elasticity of the damper. Arranging the results of an indoor excitation test on viscous shearing dampers using SA-P viscous body, an experimental equation to express the spring rigidity is derived. The spring elasticity becomes smaller with increasing temperature of viscous body, decreasing frequency, and increasing amplitude. Then, the damping addition effect is measured by installing the viscous shearing damper on the actual bridge cable, and is compared with the theoretical value resulting from the complex-eigenvalue analysis. Consequently, it is shown that the theoretical value is almost correspondent with the measured result through the analysis using equivalent coefficient of viscosity and equivalent spring constant, which are arranged in the experimental equation. Moreover, application examples of damping estimation curves for designing cables with dampers are given. 15 refs., 13 figs., 10 tabs.

  4. Sono, estado nutricional e hábitos de vida de caminhoneiros = Sleep, nutritional status and life habits of truckers

    Directory of Open Access Journals (Sweden)

    Paris, Patrícia de

    2013-01-01

    Full Text Available Objetivo: Avaliar o período de sono, o estado nutricional e os hábitos de vida dos caminhoneiros do município de Veranópolis/RS. Materiais e Métodos: Estudo retrospectivo, transversal com dados secundários de uma amostra de conveniência de 100 caminhoneiros entre 21 e 60 anos. Estudou-se variáveis sociodemográficas, de hábitos de vida, relato de doença crônica não transmissível (DCNT, uso de medicamentos para dormir ou para tratamento de saúde, questões sobre as práticas alimentares e parâmetros antropométricos. Os dados foram analisados por estatística descritiva e analítica pelo programa SPSS® com nível de significância de 5%. Resultados: A idade média dos caminhoneiros foi 38,5±10,2 anos. A maioria dorme 6,0±1,4 horas/dia, apresenta-se com sobrepeso e obesidade (82% e risco para o desenvolvimento de doenças cardiovasculares (69%. O tempo de sono teve associação com o colesterol total e o diabete mellitus. A média de refeições realizadas por dia foi de 3,4±0,9, prevalecendo o café da manhã, o almoço e o jantar. Caminhoneiros que dormem a semana inteira em casa realizam o café da manhã, o almoço e o jantar em suas residências, enquanto aqueles que dormem de 1 a 5 dias fora de casa realizam o almoço e o jantar em restaurantes. Houve associação significativa da faixa etária (p=0,044, consumo de bebidas alcoólicas (p=0,020 e realização de lanche da tarde (p=0,013 com dormir após o almoço; e dos obesos com a presença de hipertensão (p=0,035. Conclusão: O sobrepeso e a obesidade caracterizaram o estado nutricional dos caminhoneiros. O sono associou-se com as DCNT. A maioria realiza três refeições diárias, não pratica exercícios físicos e não é tabagista, porém, tem o hábito de ingerir bebidas alcoólicas

  5. Apneia obstrutiva do sono em portadores da anemia falciforme Obstructive sleep apnea in sickle cell disease carriers

    Directory of Open Access Journals (Sweden)

    Cristina Salles

    2010-02-01

    Full Text Available A Síndrome da Apneia Obstrutiva do Sono (SAOS é definida como episódios recorrentes de obstrução completa ou parcial das vias aéreas superiores que ocorrem durante o sono. O fluxo aéreo pode estar diminuído ou completamente interrompido, a despeito do esforço inspiratório, resultando em episódios intermitentes de hipoxemia, hipercapnia. A presença de SAOS poderá ser um fator de piora da hipoxemia noturna, da doença de base, concorrendo para ocorrência de síndrome torácica aguda. Com o objetivo de revisar dados sobre a fisiopatologia da SAOS em crianças e adolescentes portadores de anemia falciforme, foi realizada busca eletrônica de artigos no Medline e Lilacs nos últimos dez anos, bem como referências cruzadas dos artigos encontrados. Palavras-chaves: "sleep apnea, sickle cell anemia, sickle cell disease, pathophysiology ". Estudos sugerem que a SAOS pode potencializar o quadro clínico, ou seja, as crises álgicas, déficit de estatura, de peso, cognitivo e de inteligência, dessaturação arterial noturna, e acidente vascular cerebral das crianças portadoras de anemia falciforme. Rev. Bras. Hematol. Hemoter.Obstructive Sleep Apnea Syndrome (OSAS is defined as recurrent episodes of complete or partial obstruction of the upper airway during sleep. The airflow can be reduced or completely stopped despite of inspiratory effort, resulting in intermittent episodes of hypoxemia and hypercapnia. OSAS may be a factor in the worsening of nocturnal hypoxemia, of the underlying disease, leading to acute chest syndrome. The aim of this work was to review data on the pathophysiology of OSAS in children and adolescents with sickle cell anemia. We revisited articles published over the last ten years linked to the Medline and Lilacs databases, as well as cross-referencing using these articles. The following keywords were used: sleep apnea, obstructive sleep apnea, sickle cell anemia, sickle cell disease. Studies suggest that OSAS may

  6. Sono-photo-degradation of carbamazepine in a thin falling film reactor: Operation costs in pilot plant.

    Science.gov (United States)

    Expósito, A J; Patterson, D A; Monteagudo, J M; Durán, A

    2017-01-01

    The photo-Fenton degradation of carbamazepine (CBZ) assisted with ultrasound radiation (US/UV/H 2 O 2 /Fe) was tested in a lab thin film reactor allowing high TOC removals (89% in 35min). The synergism between the UV process and the sonolytic one was quantified as 55.2%. To test the applicability of this reactor for industrial purposes, the sono-photo-degradation of CBZ was also tested in a thin film pilot plant reactor and compared with a 28L UV-C conventional pilot plant and with a solar Collector Parabolic Compound (CPC). At a pilot plant scale, a US/UV/H 2 O 2 /Fe process reaching 60% of mineralization would cost 2.1 and 3.8€/m 3 for the conventional and thin film plant respectively. The use of ultrasound (US) produces an extra generation of hydroxyl radicals, thus increasing the mineralization rate. In the solar process, electric consumption accounts for a maximum of 33% of total costs. Thus, for a TOC removal of 80%, the cost of this treatment is about 1.36€/m 3 . However, the efficiency of the solar installation decreases in cloudy days and cannot be used during night, so that a limited flow rate can be treated. Copyright © 2016 Elsevier B.V. All rights reserved.

  7. Qualitative doping area characterization of SONOS transistor utilizing scanning capacitance microscopy (SCM) and scanning spread resistance microscopy (SSRM)

    International Nuclear Information System (INIS)

    Heo, Jinhee; Kim, Deoksu; Kim, Chung woo; Chung, Ilsub

    2005-01-01

    Continuous shrinkage in the memory devices demands further understanding about the doping concentration variations at shallow junction and channel region. Scanning capacitance microscopy (SCM) and scanning spread resistance microscopy (SSRM) can provide reliable information about the electrical and physical junction structure simultaneously. In this work, we attempt to visualize the doping concentration variations of split-gate structure silicon-oxide-nitride-oxide-silicon (SONOS) transistor with thin oxide-nitride-oxide (ONO; 4/7/11 nm). From SCM image, we could identify the source and drain region, which have different doping concentrations from that at channel region. In addition, a gate oxide layer and a depletion region were also identified. Similar results were obtained using SSRM. However, SSRM shows a better resolution, in particular, for highly doped region. For this experiment, the cross-sectional sample has been prepared using focused ion beam (FIB) and hand-polishing method. The results show that SCM and SSRM are very useful methods to analyze the doping profile near the junction as well as the channel

  8. Removal of organic compounds from natural underground water in sorption and sono-sorption processes on selected activated carbons

    Directory of Open Access Journals (Sweden)

    Pietrzyk Andżelika

    2017-01-01

    Full Text Available The article rated removal efficiency of organic matter in the processes of sorption and sono-sorption of underground water grasped for municipal purposes. The studies were conducted in laboratory scale and verified in pilot scale at the Water Treatment Plant Tarnobrzeg-Jeziórko. In the research used granular activated carbons, ie. WD-Extra, WG-12, Norit Row 0.8 and Filtrasorb 300. The processes efficiency was evaluated on the basis of changes in the following parameters, ie.: total organic carbon (TOC, permanganate index, UV absorbance, turbidity and colour. The ultrasounds were generated by means of disintegrator Sonics&Materials VCX 130, using the sonication time of 1 and 5 minutes. The results obtained for the batch tests allowed to observe a beneficial effect of ultrasound on the efficiency of the removal of organic material in the sorption process. The combination of sonication and sorption on activated carbon increased the efficiency of the removal of organic matter by 6–37% for TOC, and 18.6–27.9% for permanganate index, depending on the sorbent used. The positive laboratory results were not confirmed in a pilot scale. In the flow conditions the sonication process did not affect the efficiency of removal of organic matter on the filter model with a bed of activated carbon.

  9. Epidemiologia dos distúrbios respiratórios do sono Epidemiology of sleep-disordered breathing

    Directory of Open Access Journals (Sweden)

    Carlos Alberto de Assis Viegas

    2010-06-01

    Full Text Available Os principais distúrbios respiratórios do sono, ronco e SAOS, são muito prevalentes na população geral, embora se acredite que a maioria dos casos continue não diagnosticada. Devemos estar atentos para os principais fatores de risco que favorecem o aparecimento desses distúrbios, como gênero masculino, obesidade, envelhecimento e características crânio-faciais. Da mesma forma, a presença de hipertensão arterial sistêmica, enfermidades cardiovasculares e metabólicas deve nos alertar para a possibilidade da concomitância de SAOS.The principal types of sleep-disordered breathing-snoring and obstructive sleep apnea syndrome-are highly prevalent in the general population, although it is believed that the majority of cases continue to go undiagnosed. We should be aware of the principal risk factors that favor the onset of these disorders, such as male gender, obesity, aging and craniofacial features. Similarly, systemic arterial hypertension, cardiovascular diseases and metabolic disorders should alert us to the possibility of obstructive sleep apnea syndrome.

  10. Sono- and photoelectrocatalytic processes for the removal of ionic liquids based on the 1-butyl-3-methylimidazolium cation.

    Science.gov (United States)

    Mena, Ismael F; Cotillas, Salvador; Díaz, Elena; Sáez, Cristina; Mohedano, Ángel F; Rodrigo, Manuel A

    2017-12-06

    In this work, sono- and photoelectrolysis of synthetic wastewaters polluted with the ionic liquids 1-Butyl-3-methylimidazolium acetate (BmimAc) and chloride (BmimCl) were investigated with diamond anodes. The results were compared to those attained by enhancing bare electrolysis with irradiation by UV light or with the application of high-frequency ultrasound (US). Despite its complex heterocyclic structure, the Bmim + cation was successfully depleted with the three technologies that were tested and was mainly transformed into four different organic intermediates, an inorganic nitrogen species and carbon dioxide. Regardless of the technology that was evaluated, removal of the heterocyclic ring is much less efficient (and much slower) than oxidation of the counter ion. In turn, the counter ion influences the rate of removal of the ionic liquid cation. Thus, the electrolysis and photoelectrolysis of BmimAc are much less efficient than sonoelectrolysis, but their differences become much less important in the case of BmimCl. In this later case, the most efficient technology is photoelectrolysis. This result is directly related to the generation of free radicals in the solution by irradiation of the electrochemical system with UV light, which contributes significantly to the removal of Bmim + . Copyright © 2017 Elsevier B.V. All rights reserved.

  11. High performance SONOS flash memory with in-situ silicon nanocrystals embedded in silicon nitride charge trapping layer

    Science.gov (United States)

    Lim, Jae-Gab; Yang, Seung-Dong; Yun, Ho-Jin; Jung, Jun-Kyo; Park, Jung-Hyun; Lim, Chan; Cho, Gyu-seok; Park, Seong-gye; Huh, Chul; Lee, Hi-Deok; Lee, Ga-Won

    2018-02-01

    In this paper, SONOS-type flash memory device with highly improved charge-trapping efficiency is suggested by using silicon nanocrystals (Si-NCs) embedded in silicon nitride (SiNX) charge trapping layer. The Si-NCs were in-situ grown by PECVD without additional post annealing process. The fabricated device shows high program/erase speed and retention property which is suitable for multi-level cell (MLC) application. Excellent performance and reliability for MLC are demonstrated with large memory window of ∼8.5 V and superior retention characteristics of 7% charge loss for 10 years. High resolution transmission electron microscopy image confirms the Si-NC formation and the size is around 1-2 nm which can be verified again in X-ray photoelectron spectroscopy (XPS) where pure Si bonds increase. Besides, XPS analysis implies that more nitrogen atoms make stable bonds at the regular lattice point. Photoluminescence spectra results also illustrate that Si-NCs formation in SiNx is an effective method to form deep trap states.

  12. Nightly use of computer by adolescents: its effect on quality of sleep Uso noturno de computador por adolescentes: seu efeito na qualidade de sono

    Directory of Open Access Journals (Sweden)

    Gema Mesquita

    2007-06-01

    Full Text Available OBJECTIVE: To analyze the influence of nocturnal use of computer and their effect on sleep quality, in a group of adolescents. METHOD: Two middle schools were chosen for the research. The sample consisted of adolescents n=160 (55M; 105F, with ages ranging from 15 to 18 years. Questionnaire about computer use with the objective of obtaining information regarding the time and number of hours of nocturnal computer use, were applied for collection of data. They included the Pittsburgh Sleep Quality Index (PSQI, utilized to quantfy sleep quality; student report cards were used to note student's absences and grades were used. RESULTS: The Multiple Logistic Regression test indicated that nocturnal computer use impairs good sleep (p=0.0062. CONCLUSION: Irregular sleep patterns associated with nightly computer use deteriorate sleep quality.OBJETIVO: Analisar a influência do uso noturno de computador na qualidade de sono, em um grupo de adolescentes. MÉTODO: Foram escolhidas duas instituições educacionais de ensino médio. A amostra tomada foi composta de adolescentes (n=160, ( 55 M; 105 F ; a faixa etária estudada foi de 15 a 18 anos. Para a coleta de dados aplicou-se: Questionário para uso do computador, com a finalidade de coletar informações sobre o horário e a quantidade de horas do uso do computador durante as noites; Índice de Qualidade de Sono de Pittsburgh (IQSP utilizado para quantificar a qualidade do sono; e os boletins dos alunos por meio dos quais foram recolhidas as faltas e as notas dos alunos. RESULTADOS: Pela Regressão Logística Múltipla, observou-se que o uso do computador é um fator que compromete o dormir bem (p=0,0062. CONCLUSÃO: Padrões irregulares de sono associados ao uso noturno de computador estão associados à deterioração da qualidade do sono.

  13. Desenvolvimento dos estados de sono na infância Desarrollo de los estados de sueño en la infancia Development of sleep stages in childhood

    Directory of Open Access Journals (Sweden)

    Lorena Teresinha Consalter Geib

    2007-06-01

    Full Text Available Na perspectiva de descrever alguns aspectos da ontogênese e da organização dos estados de sono no primeiro ano de vida, revisou-se na literatura as alterações fisiológicas e comportamentais controladas pelas mudanças que ocorrem durante o sono nessa etapa desenvolvimental. Além disso, com fundamentação na teoria precursora do sono, expõe-se as etapas da diferenciação, a classificação e a organização temporal dos estados de sono, com vistas ao manejo favorável dos eventos ambientais, que afetam a organização do sono infantil.Con la perspectiva de describir algunos aspectos de la ontogénesis y de la organización de los estados del sueño en el primer año de la vida, fueron revisadas, en la literatura, las alteraciones fisiológicas y comportamentales controladas por los cambios que ocurren durante el sueño en esta etapa del desenvolvimiento. Además de esto, fundamentándose en la teoría precursora del sueño, se exponen las etapas de la diferencia, de la clasificación y de la organización temporal de los estados del sueño, con vistas al manejo favorable de los eventos ambientales, que afectan la organización del sueño infantil.With the perspective of describing some aspects of the ontogenesis and organization of the sleep stages during the first year of life, a literature review was carried out to assess the physiological and behavioral alterations controlled by changes occurring during sleep at this developmental stage. In addition, based on the sleep preceding theory, the stages of differentiation, classification and time organization of sleep stages are presented, aiming at the favorable management of environmental events that affect the organization of infant sleep.

  14. Bruxismo do sono: possibilidades terapêuticas baseadas em evidências Sleep bruxism: therapeutic possibilities based in evidences

    Directory of Open Access Journals (Sweden)

    Eduardo Machado

    2011-04-01

    Full Text Available INTRODUÇÃO: o bruxismo do sono (BS é uma desordem de movimentos estereotipados e periódicos, associados ao ranger e/ou apertar de dentes durante o sono, decorrentes da contração rítmica dos músculos mastigatórios. Essa condição não é uma doença, porém quando exacerbada pode ocasionar desequilíbrio e alteração das estruturas orofaciais. Dessa forma, surge a necessidade de se obter terapêuticas efetivas e seguras para o controle e o manejo do paciente bruxômano. As alternativas de tratamento variam desde terapêuticas orodentais e farmacológicas até técnicas comportamentais-cognitivas. OBJETIVOS: através de uma revisão sistemática da literatura, tendo como bases de pesquisa a Medline, Cochrane, Embase, Pubmed, Lilacs e BBO, no período compreendido entre 1990 e 2008, e com enfoque em estudos clínicos randomizados e quasi-randomizados, revisões sistemáticas e meta-análises, esse trabalho teve como objetivo analisar e discutir métodos de tratamento para o BS. RESULTADOS: pela análise da literatura verifica-se que existe uma grande quantidade de opções terapêuticas para o BS, porém muitas das terapias não têm suporte científico que as sustente. Assim, a escolha terapêutica deve ser pautada em evidências científicas e no bom senso clínico, objetivando uma melhora na qualidade de vida do paciente bruxômano.INTRODUCTION: Sleep bruxism (SB is defined as a stereotyped and periodic movement disorder, characterized by tooth grinding and/or clenching occurring during sleep, associated with rhythmic masticatory muscle activity. This condition isn't a disease, but when exacerbated may cause an unbalance and changing of orofacial structures. Thus, it is necessary to obtain effective and safe treatments for the control and management of the bruxist patient. The treatment alternatives ranges from oral devices to pharmacological and cognitive-behavioral techniques. OBJECTIVES: This study, through a systematic literature

  15. Hipersonolência diurna e variáveis polissonográficas em doentes com síndroma de apneia do sono

    Directory of Open Access Journals (Sweden)

    O. Mediano

    2007-11-01

    Full Text Available Resumo: A síndroma de apneia obstrutiva do sono (SAOS caracteriza-se por episódios repetidos de obstrução da via aérea superior, hipoxemia nocturna e fragmentação do sono. A hipersonolência diurna constitui um sintoma frequente nos doentes com esta síndroma, embora possa estar ausente. A sua presença representa uma limitação significativa da qualidade de vida do indivíduo, bem como um aumento da morbilidade e mortalidade da SAOS, visto ser um importante factor de risco para acidentes de viação e laborais, podendo originar alterações cognitivo-comportamentais relevantes.O mecanismo desencadeante de hipersonolência diurna não é claro. Alguns autores relacionaram esta com a arquitectura anormal do sono, o que, no entanto, não foi confirmado por outros investigadores. Alguns estudos salientaram a relação entre a hipersonolência diurna e os níveis de dessaturação nocturna da oxi-hemoglobina, mas este facto não foi comprovado cientificamente.O objectivo do presente trabalho foi analisar quais os mecanismos responsáveis pela sonolência diurna nos doentes com SAOS. Assim, numerosas variáveis registadas no estudo polissonográfico foram comparadas em dois grupos de indivíduos com esta patologia, apresentando um deles hipersonolência diurna inequívoca e o outro a total ausência da mesma.Foram avaliados 65 indivíduos seguidos no Departamento Respiratório do Hospital Universitário do Son Dureta (Palma de Maiorca que possuíam no registo poligráfico nocturno um índice de apneia/hipopneia (IAH >20/h. A sonolência excessiva foi determinada utilizando a escala de sono de Epworth (ESE e o teste de latência múltipla. A sua presença foi considerada sempre que o score de ESE >10 e o score do teste de latência múltipla 10 min.Cerca de 25 indivíduos foram excluídos devido a discrepância entre os resultados das referidas determinações. Dos 40 doentes restantes, 23 apresentavam hipersonolência diurna e 17 n

  16. Hipersonolência diurna e variáveis polissonográficas em doentes com síndroma de apneia do sono

    Directory of Open Access Journals (Sweden)

    O. Mediano

    2007-11-01

    Full Text Available Resumo: A síndroma de apneia obstrutiva do sono (SAOS caracteriza-se por episódios repetidos de obstrução da via aérea superior, hipoxemia nocturna e fragmentação do sono. A hipersonolência diurna constitui um sintoma frequente nos doentes com esta síndroma, embora possa estar ausente. A sua presença representa uma limitação significativa da qualidade de vida do indivíduo, bem como um aumento da morbilidade e mortalidade da SAOS, visto ser um importante factor de risco para acidentes de viação e laborais, podendo originar alterações cognitivo-comportamentais relevantes.O mecanismo desencadeante de hipersonolência diurna não é claro. Alguns autores relacionaram esta com a arquitectura anormal do sono, o que, no entanto, não foi confirmado por outros investigadores. Alguns estudos salientaram a relação entre a hipersonolência diurna e os níveis de dessaturação nocturna da oxi-hemoglobina, mas este facto não foi comprovado cientificamente.O objectivo do presente trabalho foi analisar quais os mecanismos responsáveis pela sonolência diurna nos doentes com SAOS. Assim, numerosas variáveis registadas no estudo polissonográfico foram compara das em dois grupos de indivíduos com esta patologia, apresentando um deles hipersonolência diurna inequívoca e o outro a total ausência da mesma.Foram avaliados 65 indivíduos seguidos no Departamento Respiratório do Hospital Universitário do Son Dureta (Palma de Maiorca que possuíam no registo poligráfico nocturno um índice de apneia/hipopneia (IAH >20/h. A sonolência excessiva foi determinada utilizando a escala de sono de Epworth (ESE e o teste de latência múltipla. A sua presença foi considerada sempre que o score de ESE >10 e o score do teste de latência múltipla 10 min.Cerca de 25 indivíduos foram excluídos devido a discrepância entre os resultados das referidas determinações. Dos 40 doentes restantes, 23 apresentavam hipersonolência diurna e 17 n

  17. Qualidade de sono, atividade física durante o tempo de lazer e esforço físico no trabalho entre trabalhadores noturnos de uma indústria cerâmica

    Directory of Open Access Journals (Sweden)

    Elaine Cristina Marqueze

    Full Text Available Este estudo teve o objetivo de verificar a relação entre qualidade do sono e atividade física durante o tempo de lazer entre trabalhadores noturnos com um elevado esforço físico no trabalho (média de 14.245; DP 3.456 kcal/semana. Também foi avaliada a relação entre a qualidade do sono e o nível do esforço físico no trabalho. Um total de 19 trabalhadores noturnos de uma indústria cerâmica respondeu o índice da qualidade do sono de Pittsburgh (PSQI e o questionário internacional da atividade física (IPAQ. Foi calculado o dispêndio calórico total por semana para cada trabalhador através do equivalente metabólico (METs. Os trabalhadores foram distribuídos em dois grupos, de acordo com os escores do PSQI. Foi realizada a análise descritiva dos dados por meio de médias, valores mínimo e máximo, proporções e desvios-padrão. A relação entre qualidade do sono e atividade física foi avaliada pelo teste Mann-Whitney. O grupo de qualidade do sono ruim mostrou nível mais elevado de gasto energético no trabalho que o outro grupo, o que sugere uma relação entre gasto energético no trabalho e qualidade de sono. Distúrbios do sono e sonolência diurna também contribuíram para a qualidade de sono ruim. Esses resultados, embora preliminares, revelam uma tendência de que o elevado esforço físico no trabalho noturno contribui para baixa qualidade de sono.

  18. Sleep disorders and quality of life of harvesters rural labourers Distúrbios do sono e qualidade de vida de trabalhadores rurais safristas

    Directory of Open Access Journals (Sweden)

    Joseane Lima

    2010-06-01

    Full Text Available The various kinds of work may interfere in the laborer's quality of sleep. Among the factors, the unemployment caused by the period between the coffee harvests on the agriculture of South Minas may influence the appearance of anxiety and depression symptoms, and it may cause impairments to the quality of life and changes in the rural laborers' pattern of sleep. OBJECTIVE: To appraise the sleep and the effects on the quality of life in the rural laborers in the period between the coffee harvests. METHOD: In the study-group, 40 patients, rural laborers, were evaluated, and in the control-group, 40 patients, fixed laborers. Instruments used: clinical interview, The Pittsburgh Sleep Quality, Index Beck Anxiety Inventory, Hamilton Depression Rating Scale, and World Health Organization Quality of Life. RESULTS: The study-group showed impairment in the quality of the sleep; anxiety and depression signals and symptoms were high in both groups; being them higher in the harvesters laborers; the quality of life presented good levels in both groups, with losses in the domain "social relationship" between the harvesters; the sleep disturbances influenced the appearance of anxiety and depression signs and symptoms, but they did not interfere in the perception of the quality of life. CONCLUSION: The rural laborers that have fixed labors are less exposed to the symptoms of anxiety and depression - along with sleep disorders - than the harvesters laborers. Thus, the study-group's perception of the quality of life is better than the control-group's.As diversas formas de trabalho podem interferir na qualidade do sono do trabalhador. Entre os fatores, o desemprego ocasionado pela entressafra da cultura cafeeira nas lavouras sul mineiras pode influenciar no surgimento de sintomas de ansiedade e de depressão e causar prejuízos na qualidade de vida e alterações no padrão do sono dos trabalhadores rurais. OBJETIVO: Avaliar o sono e as repercussões na qualidade de

  19. Green method for ultrasensitive determination of Hg in natural waters by electrothermal-atomic absorption spectrometry following sono-induced cold vapor generation and 'in-atomizer trapping'

    International Nuclear Information System (INIS)

    Gil, Sandra; Lavilla, Isela; Bendicho, Carlos

    2007-01-01

    Sono-induced cold vapor generation (SI-CVG) has been used for the first time in combination with a graphite furnace atomizer for determination of Hg in natural waters by electrothermal-atomic absorption spectrometry after in situ trapping onto a noble metal-pretreated platform (Pd, Pt or Rh) inserted into a graphite tube. The system allows 'in-atomizer trapping' of Hg without the use of conventional reduction reactions based on sodium borohydride or tin chloride in acid medium for cold vapor generation. The sono-induced reaction is accomplished by applying ultrasound irradiation to the sample solution containing Hg(II) in the presence of an organic compound such as formic acid. As this organic acid is partly degraded upon ultrasound irradiation to yield CO, CO 2 , H 2 and H 2 O, the amount of lab wastes is minimized and a green methodology is achieved. For this purpose, experimental variables influencing the generation/trapping process are fully investigated. The limit of detection for a 10 min trapping time and 10 mL sample volume was 0.03 μg L -1 (Integrated absorbance) and the repeatability expressed as relative standard deviation was about 3%. Carbonates and chlorides at 100 mg L -1 level caused a signal depression by 20-30%. The enhanced trapping efficiency observed with the sono-induced cold vapor generation as compared with 'in-atomizer trapping' methods employing chemical vapor generation is discussed. A reaction pathway for SI-CVG is proposed on the basis of the current knowledge for synthesis of noble metal nanoparticles by ultrasound

  20. Alterações cardiovasculares na síndrome da apnéia obstrutiva do sono Cardiovascular comorbidities and obstructive sleep apnea

    Directory of Open Access Journals (Sweden)

    Fátima Dumas Cintra

    2006-06-01

    Full Text Available A síndrome da apnéia obstrutiva do sono (SAHOS é uma condição prevalente na população, associada a maior risco cardiovascular, freqüentemente não-diagnosticada. O reconhecimento da síndrome requer alto grau de suspeita clínica, especialmente por cardiologistas, e pode ser confirmada por meio da polissonografia. O tratamento da síndrome com o uso de CPAP (pressão positiva na via aérea superior é altamente eficaz, melhorando o padrão respiratório durante o sono, instituindo o sono reparador e, dessa forma, otimizando a qualidade de vida desses pacientes, além de atenuar ou reverter muitas das complicações cardiovasculares relacionadas a SAHOS. Este artigo aborda a fisiopatologia e os aspectos clínicos das comorbidades cardiovasculares associadas à síndrome.Obstructive sleep apnea-hypopnea syndrome (OSAHS is a prevalent condition in the general population. It is associated with increased cardiovascular risk and often goes unrecognized. Its diagnose requires a high degree of clinical suspicion, particularly on the part of cardiologists, and it may be confirmed by polysomnography. Continuous positive airway pressure (CPAP therapy is highly effective, since it improves sleep breathing pattern, promotes restful sleep and thus enhances the quality of life of these patients, in addition to attenuating or reversing many cardiovascular complications related to OSAHS. This paper addresses the pathophysiology and clinical features of cardiovascular comorbidities associated with the syndrome.

  1. Transport-limited current and micro-sono-reactor characterization at 3 low frequencies in the presence of water, acetonitrile and imidazolium-based ionic liquids

    International Nuclear Information System (INIS)

    Costa, C.; Hihn, J. Y.; Rebetez, M.; Doche, M. L.; Bisel, I.; Moisy, P.

    2008-01-01

    A micro-sono-reactor, specially designed to carry out electrochemical tests in a room-temperature ionic liquid medium (RTIL), was studied. The cell, based on a particular design consisting of off-setting the ultrasonic probe out of the reaction volume, was characterized by several methods such as calorimetry, dosimetry and mass transfer measurements. The main result concerns the specific behaviour of the ionic liquid under ultrasonic irradiation. For example, the mass-transfer enhancement is particularly high, characterized by an average Sherwood number of 6500 while the value obtained with an electrode rotating at 4500 rpm is only 1200. (authors)

  2. Alterações do ciclo sono-vigília moduladas por Dopamina e suas consequências Mnemônicas

    OpenAIRE

    Franca, Arthur Sergio Cavalcanti de

    2012-01-01

    As descobertas da neurociência estão em franca ascensão. A sua grande interdisciplinaridade facilita uma abordagem mais complexa do cérebro, abrangendo com profundidade diversas áreas. No entanto, muitos fenômenos que fascinam a humanidade estão longe de ser completamente elucidados; nesse contexto se encontra a relação entre a consolidação das memórias e o sono. Nesse trabalho investigamos o papel de parte do sistema dopaminérgico no processo de consolidação de memórias e n...

  3. Caracterização dos padrões de dor, sono e alexitimia em pacientes com fibromialgia atendidos em um centro terciário brasileiro

    Directory of Open Access Journals (Sweden)

    Lazslo A. Avila

    2014-10-01

    Full Text Available Objetivos: Fibromialgia (FM é uma síndrome complexa, caracterizada por uma dor musculoesquelética crônica duradoura e difusa, derivada de causas não inflamatórias e classicamente associada à presença de pontos sensíveis específicos. No entanto, estudos destacaram outros sintomas importantes associados à má qualidade de vida (QDV em pacientes com FM, por exemplo, distúrbios do sono e alexitimia. Esse estudo teve por objetivo investigar os padrões de dor, sono e alexitimia de pacientes com FM em um centro terciário brasileiro. Métodos: 20 pacientes com FM acompanhados na clínica ambulatorial de reumatologia de um centro terciário brasileiro (Faculdade de Medicina de São José do Rio Preto - FAMERP, São Paulo, Brasil e 20 pacientes sem FM provenientes de outros serviços ambulatoriais da FAMERP completaram um questionário clínico e sociodemográfico, o Fibromyalgia Impact Questionnaire (FIQ, o Pittsburgh Sleep Quality Index (PSQI, o Toronto Alexithymia Scale (TAS-20 e o SF-36 (WHOQOL. Resultados: Os pacientes com FM tiveram desempenhos piores em todas as dimensões de QDV do SF-36 e escores mais altos no PSQI (P = 0,01 e no TAS-20 (P = 0,02. Pacientes com FM também tiveram escores significativamente mais altos em todos os domínios específicos do PSQI e TAS-20. Discussão: Os presentes dados concordavam com a literatura, evidenciando pior desempenho de pacientes com FM no impacto da dor, queixas de sono e maior presença de alexitimia. Conclusão: Estudos evidenciaram, além das queixas de dor, a presença de sintomas importantes e frequentemente subdiagnosticados, em pacientes com FM, como queixas relativas ao sono e alexitimia. Um conhecimento mais aprofundado desses distúrbios poderia melhorar a abordagem e o tratamento dos pacientes com FM.

  4. Padrão do ciclo sono-vigília e sua relação com a ansiedade em estudantes universitários Sleep/wake cycle pattern and its relationship with anxiety in college students

    Directory of Open Access Journals (Sweden)

    Katie Moraes de Almondes

    2003-04-01

    Full Text Available Neste trabalho, foram investigadas as relações entre o ciclo sono-vigília e a ansiedade. O ciclo sono-vigília e traço e estado de ansiedade foram avaliados em 37 estudantes do segundo ano do curso médico. Os estudantes responderam ao Índice de Qualidade de Sono de Pittsburgh - IQSP, ao Inventário de Estado e Traço de Ansiedade - IDATE e a um questionário de matutinidade - vespertinidade (cronotipo. Todos registraram seu sono em um diário durante duas semanas. Os resultados mostraram que os estudantes de medicina tinham altos escores de traço e estado de ansiedade. Aqueles que tinham maiores escores de traço de ansiedade acordavam mais cedo nos dias de semana e finais de semana enquanto os que apresentavam irregularidade do seu ciclo sono-vigília apresentaram maior estado de ansiedade. Sugere-se que há uma relação entre o ciclo sono-vigília e a ansiedade.This paper examines the relationship between the sleep/wake cycle and anxiety in medical students. The sleep/wake cycle and anxiety were evaluated in 37 second year medical school students. The volunteers answered a morningness-eveningness questionnaire, Pittsburgh Sleep Quality Index - PSQI and state and trait of anxiety inventory - STAI; all kept a sleep/wake diary for two weeks. The results showed that the students had high anxiety trait and state. Students who had high anxiety trait had an earlier sleep offset on weekdays and weekend, and students who displayed irregularity in the sleep/wake cycle had high anxiety state. These results suggest a relationship between the sleep/wake cycle and anxiety.

  5. Mesoporous generation-inspired ultrahigh capacitive deionization performance by sono-assembled activated carbon/inter-connected graphene network architecture

    International Nuclear Information System (INIS)

    Song, Haiou; Wu, Yifan; Zhang, Shupeng; Li, Wentao; Wang, Baijun; Wang, Changming; Gao, Juanjuan; Li, Aimin

    2016-01-01

    Highlights: • 3D AC/inter-connected graphene network architecture has been constructed for CDI application. • Generated mesoporous structures can inspire ultrahigh capacitive deionization performance. • Usage of the smaller amounts (5 wt%) of functionalized graphene reduce the secondary pollution. • Inter-connected graphene network as the conductive bridge can decrease the aggregation of AC. • The environmental and economical composite electrode is suitable for practical CDI application. - Abstract: Capacitive deionization (CDI) is an emerging technology that supplies deionized water to resolve the fresh water shortage. CDI electrodes are mainly made up of carbon materials, of which the deionization performance is closely related to their physical properties and structures. Hence, a rational design of electrode material structure is essentially significant. Functionalized graphene (fG) in particular has recently been regarded as characteristic CDI electrode material. However, preparation of fG based on graphene oxide usually results in serious secondary pollution due to usage of highly poisonous chemicals, and thus still cannot meet the demand of practical application. It is feasible that environmentally-friendly activated carbon (AC) and small amounts of fGs can be combined rationally, and used as CDI electrodes. Here, sono-assembled AC/m-phenylenediamine (mPEA) or p-phenylenediaminefG inter-connected network architecture has been constructed for the first time successfully. The specific capacitances of the AC/fG composites were found to be significantly higher than that of the AC electrode owing to mesoporous generation. Also, among all the samples, the AC composite with 5 wt % mPEA-fG exhibited an ultrahigh electrosorption capacity of 12.58 mg/g (or 0.22 mmol/g) in NaCl solution. These observations indicate that fG can serve as an efficient conductive bridge to decrease the aggregation of AC particles, and improve the electron transfer with the

  6. Sedentarismo e hábitos de sono entre adolescentes de 10 a 19 anos estudantes de escolas estaduais do município de Ribeirão Preto

    OpenAIRE

    Adriana Lucas Louro

    2015-01-01

    O presente estudo objetivou estudar as características relacionadas ao nível de atividade física e hábitos de sono entre adolescentes de 10 a 19 anos de idade. Trata-se de um estudo transversal, observacional e descritivo que foi realizado por meio de entrevistas, o qual foram utilizados dois questionários, um contendo questões acerca dos hábitos de sono, e o IPAQ para estudar o nível de atividade física. Foram estudados 535 adolescentes de ambos os sexos, estudantes de escolas públicas estad...

  7. Melhora da dor, do cansaço e da qualidade subjetiva do sono por meio de orientações de higiene do sono em pacientes com fibromialgia Improvement in pain, fatigue, and subjective sleep quality through sleep hygiene tips in patients with fibromyalgia

    Directory of Open Access Journals (Sweden)

    Aline Cristina Orlandi

    2012-10-01

    Full Text Available OBJETIVO: Avaliar a efetividade das orientações para higiene do sono em mulheres portadoras de fibromialgia. MATERIAIS E MÉTODOS: Setenta mulheres completaram o estudo. Na avaliação foram aplicados o Questionário de Impacto da Fibromialgia(FIQ, o Índice de Qualidade do Sono de Pittsburgh (PSQI e um questionário geral, com dados pessoais e informações de hábitos de vida. Todas as pacientes receberam informações quanto à doença, além de um diário do sono, e apenas o grupo-experimental recebeu orientações para higiene do sono. Foi solicitado às pacientes que realizassem a higiene do sono, e as mesmas foram reavaliadas após três meses. RESULTADOS: A idade média das pacientes do grupo-controle foi 55,2 ± 7,12 anos, e a do grupo-experimental foi 53,5 ± 8,89 anos (P = 0,392. Nessas pacientes foram observadas diminuições da medida de Escala Visual Analógica de dor (P = 0,028, de cansaço (P = 0,021 e do componente 1 do PSQI (P = 0,030. O grupo que recebeu orientações para higiene do sono mostrou redução significativa na dificuldade de retorno ao sono quando acordava de madrugada (P = 0,031. O grupo-experimental apresentou aumento na porcentagem de relatos de "ambiente sem ruído" (variando de 42,9% para 68,6%, diminuição da porcentagem de relatos de "ambiente com pouco ruído" (variando de 40% para 22,9% e diminuição na porcentagem de relatos de "ambiente com muito ruído" (variando de 17,1% para 8,6%. As alterações facilitaram o retorno ao sono quando as pacientes acordavam durante a madrugada. CONCLUSÃO: Uma cartilha com orientações de higiene do sono permitiu a alteração do comportamento das pacientes, que obtiveram melhora da dor e do cansaço, aumento da qualidade subjetiva do sono, além de facilitação do retorno ao sono após despertar durante a madrugada.OBJECTIVE: To evaluate the effectiveness of sleep hygiene instructions for women with fibromyalgia. MATERIALS AND METHODS: Seventy women with

  8. Resultados preliminares do tratamento dos pacientes submetidos a radiofreqüência (baixa freqüência, somnoplastia no ronco e apnéia leve do sono

    Directory of Open Access Journals (Sweden)

    Dibbern Ralph S.

    2002-01-01

    Full Text Available Introdução: O ronco afeta 5 a 50% da população tornando-se um problema médico e social importante. O tratamento pode ser com medidas comportamentais, CPAP e cirúrgico. Objetivo: Avaliar os resultados pós-operatórios dos pacientes submetidos à radiofreqüência em palato. Forma de estudo: retrospectivo clínico. Material e método: 28 pacientes submetidos à radio-freqüência em palato, com diagnóstico de Ronco e Apnéia Leve do Sono. Observamos os resultados pós-operatórios através das Escalas de Epworth, Ronco e Sonolência diurna, complicações e percentual de melhora dos sintomas. A análise estatística foi pelo Mann Whytney Test. Resultados: 16 pacientes com melhora subjetiva do Ronco acima de 70% após a cirurgia; 26 pacientes mostraram redução significativa pelas Escalas, com complicações mínimas. Conclusão: Radio-freqüência é um método seguro e eficaz no tratamento do Ronco e Apnéia Leve do Sono. Resultados melhores serão obtidos com avaliação criteriosa pré e pós-operatórias.

  9. Transport property of novel sono-catalysed LiCF sub 3 SO sub 3 doped SiO sub 2 -PEG ormolyte

    CERN Document Server

    Jung, H Y; Wi, C J; Whang, C M

    2003-01-01

    Transport property of a novel sono-catalysed LiCF sub 3 SO sub 3 doped SiO sub 2 -10 wt% PEG ormolyte is reported. The ormolyte was synthesized by sol-gel method by varying the LiCF sub 3 SO sub 3 concentration [Li/O] from 0 to 0.1 in mole. The composition with [Li/O] = 0.05 exhibited the highest conductivity (sigma sub 2 sub 5 sub d eg sub C = 2.4x10 sup - sup 4 S cm sup - sup 1) with an enhancement of 10 sup 3 from that of the host matrix: SiO sub 2 -10 wt% PEG sono gel and has been referred to as 'optimum conducting composition (OCC)'. The direct determination of Li sup + ion mobility (mu)/mobile ion concentration (n) indicated that the enhancement was due to the increase in mu and n both. The temperature dependence of sigma, mu and n were carried out for the OCC samples in order to evaluate the respective energies involved in different thermally activated processes and to understand the ion transport mechanism. The ion transference number (t sub i sub o sub n) measurement inferred the ions as the sole cha...

  10. Pediatras e os distúrbios respiratórios do sono na criança Pediatricians and sleep-disordered breathing in the child

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    Aracy Pereira Silveira Balbani

    2005-04-01

    Full Text Available OBJETIVOS: pesquisar as opiniões e condutas de pediatras frente aos distúrbios respiratórios do sono (DRS em crianças. MÉTODOS: Foram selecionados aleatoriamente 516 pediatras do Estado de São Paulo. Foi enviado aos pediatras, por correio, um formulário de questões sobre: perfil profissional, seu conhecimento do DRS na criança, opiniões e condutas para diagnóstico e tratamento dessa doença. RESULTADOS: Retornaram preenchidos 112 questionários anônimos (21,7%. O ensino de DRS na infância durante a graduação e a residência médica em Pediatria foi considerado insatisfatório, respectivamente, por 65,2% e 34,8% dos pediatras. Quarenta e nove pediatras (43,8% avaliaram seu conhecimento de DRS na criança como regular, 39 (34,8% como bom e 17 (15,2% como insatisfatório. As questões de anamnese do sono consideradas mais importantes foram: respiração bucal, pausas respiratórias, número de horas de sono, sonolência diurna excessiva e chiado noturno. Os dados clínicos considerados mais importantes para a suspeita de síndrome da apnéia obstrutiva do sono (SAOS foram: pausas respiratórias, hipertrofia da adenóide, respiração bucal, presença de anomalia craniofacial e ronco. As principais condutas citadas para diagnóstico de SAOS na criança foram: radiografia do cavum e avaliação com otorrinolaringologista (25% e oximetria de pulso noturna (14,2%. Somente 11,6% dos pediatras indicaram a polissonografia de noite inteira e 4,5%, a polissonografia breve diurna. As condutas consideradas mais eficazes para tratamento de DRS foram: cirurgias de adenoidectomia e adenotonsilectomia, orientação aos pais, perda de peso e higiene do sono. CONCLUSÕES: Há um descompasso entre as pesquisas sobre DRS na infância e sua abordagem na prática pediátrica.OBJECTIVES: assessment of opinions and practices of pediatricians concerning sleep-disordered breathing (SDB in children. METHODS: randomly 516 pediatricians were selected in the

  11. Qualidade de vida em crianças com distúrbios respiratórios do sono Quality of life in children with sleep-disordered breathing

    Directory of Open Access Journals (Sweden)

    Amaury de Machado Gomes

    2012-10-01

    Full Text Available Crianças podem apresentar distúrbios respiratórios do sono (DRS com repercussões na qualidade de vida. OBJETIVO: Avaliar a qualidade de vida de crianças com DRS, comparar crianças com Síndrome da Apneia Obstrutiva do Sono (SAOS e Ronco Primário (RP e identificar quais os domínios do OSA-18 estão mais comprometidos. MÉTODOS: Estudo de coorte histórica com corte transversal em crianças com história de ronco e hiperplasia adenotonsilar. Para avaliar qualidade de vida foi aplicado o questionário OSA-18 aos cuidadores e realizado polissonografia para diagnóstico. RESULTADOS: Participaram 59 crianças com média de idade de 6,7 ± 2,26 anos. O escore médio do OSA-18 foi 77,9 ± 13,22 e os domínios mais afetados foram: "preocupação dos responsáveis" (21,8 ± 4,25, "perturbação do sono" (18,8 ± 5,19, "sofrimento físico" (17,3 ± 5,0. O impacto foi pequeno em seis crianças (10,2%, moderado em 33 (55,9% e grande em 20 (33,9%. RP foi encontrado em 44 crianças (74,6%, SAOS em 15 (25,6%. SAOS tem escore maior no domínio "sofrimento físico" que RP (p = 0,04. CONCLUSÃO: Distúrbios respiratórios do sono na infância causam comprometimento na qualidade de vida e os domínios mais comprometidos do OSA-18 foram: "preocupação dos responsáveis", "perturbação do sono" e "sofrimento físico". SAOS tem o domínio "sofrimento físico" mais afetado que roncadores primários.Children may present sleep-disordered breathing (SDB and suffer with adverse effects upon their quality of life. OBJECTIVE: This study assessed the quality of life of children with SDB, compared subjects with obstructive sleep apnea syndrome (OSAS and primary snoring (PS, and identified which areas in the OSA-18 questionnaire are more affected. METHODS: This is a historical cohort cross-sectional study carried out on a consecutive sample of children with history of snoring and adenotonsillar hyperplasia. The subject's quality of life was assessed based on the

  12. Coexistência de transtornos respiratórios do sono e síndrome fibromiálgica Sleep disordered breathing concomitant with fibromyalgia syndrome

    Directory of Open Access Journals (Sweden)

    Dienaro Germanowicz

    2006-08-01

    Full Text Available OBJETIVO: Identificar síndrome fibromiálgica em pacientes com transtornos respiratórios do sono. MÉTODOS: Foram estudados 50 pacientes que compareceram à Clínica do Sono com queixas de roncar no sono, apnéias e sonolência diurna. Confirmou-se o diagnóstico de transtornos respiratórios do sono através de polissonografia. Para se estabelecer o diagnóstico de síndrome fibromiálgica, submeteram-se os pacientes a avaliação de acordo com os critérios estabelecidos pelo American College of Rheumatology. RESULTADOS: Estudaram-se 50 pacientes, 32 do sexo masculino. A média (± desvio-padrão de idade do grupo foi de 50 ± 12 anos. A média do índice de massa corporal do grupo foi de 29,7 ± 5,6 kg/m². A média do índice de apnéias e hipopnéias do grupo foi de 36 ± 29 apnéias e hipopnéias /hora. Nove das 18 mulheres e 2 homens preencheram os critérios estabelecidos pelo American College of Rheumatology para o diagnóstico de síndrome fibromiálgica. CONCLUSÃO: Considerando-se que a prevalência de síndrome fibromiálgica na população geral é de 0,5% para homens e de 3,4% para mulheres, a fração de casos de fibromialgia mais de dez vezes maior nesta amostra reforça a hipótese de associação entre transtornos respiratórios do sono e síndrome fibromiálgica.OBJECTIVE: To identify fibromyalgia syndrome in patients with sleep disordered breathing. METHOD: We studied 50 patients seeking treatment at a sleep disorder clinic for snoring, apnea and excessive daytime sleepiness. Sleep disordered breathing was diagnosed through the use of polysomnography. To diagnose fibromyalgia syndrome, patients were evaluated in accordance with the criteria established by the American College of Rheumatology. RESULTS: Of the 50 patients, 32 were male. The mean (± standard deviation age of the group was 50 ± 12 years. The mean body mass index was 29.7 ± 5.6 kg/m². The mean apnea-hypopnea index was 36 ± 29 attacks of apnea or hypopnea

  13. Analysis of sleep characteristics in post-polio syndrome patients Análise das características do sono em pacientes com síndrome pós-poliomielite

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    Tatiana Mesquita e Silva

    2010-08-01

    Full Text Available The main post-polio syndrome (PPS symptoms are new weakness, new atrophy, fatigue, pain and sleep disturbances. Polysomnography is the gold standard for sleep analysis. OBJECTIVE: To analyze sleep patterns in PPS patients. METHOD: Sixty patients (mean age 46.8±11.3 years at the Federal University of São Paulo (UNIFESP/EPM complaining of sleep disturbances were evaluated by means of polysomnography, performed at the Sleep Institute. RESULTS: Sleep efficiency was lower due to high sleep latency and arousal index. The apnea and hypopnea index (AHI and the periodic limb movements (PLM index were higher. Sleep architecture was also impaired. There were no abnormalities of oxygen saturation, carbon dioxide levels, respiratory rate or heart rate. CONCLUSION: New post-polio sleep disturbances were isolated symptoms. It appears that these symptoms were not due to post-polio features, but rather, that they were due to dysfunction of the surviving motor neurons in the brainstem. Abnormal dopamine production, which is responsible for many sleep-related breathing disorders and abnormal movements, may also have been implicated in the present findings.Dentre as manifestações clínicas da síndrome pós poliomielite (SPP destacam-se nova fraqueza, fadiga, dor, nova atrofia e transtornos do sono. A polissonografia de noite inteira permanece sendo padrão ouro para análise do sono e diagnóstico de transtornos do sono. OBJETIVO: Verificar os transtornos de sono nos pacientes com SPP. MÉTODO: 60 pacientes com SPP (media de idade 46,8±11,3 anos, da UNIFESP/EPM,que apresentavam queixas sobre sono realizaram uma noite de polissonografia no Instituto do Sono. RESULTADOS: A eficiência do sono é diminuída em decorrência do aumento da latência do sono e do índice de despertar. O índice de apnéia e hipopnéia (IAH e o índice de movimentos periódicos dos membros (iPLM estão aumentados. A arquitetura do sono é prejudicada por essas alterações. Não h

  14. Qualidade de sono e sua relação com o rendimento acadêmico em estudantes universitários de turnos distintos = Sleep quality and its relationship with academic performance in college students of different shifts

    Directory of Open Access Journals (Sweden)

    Araújo, Danilo de Freitas

    2012-01-01

    Full Text Available Analisou-se a correlação entre níveis de sonolência, qualidade do sono e rendimento acadêmico de graduandos. A amostra (média de idade: 24 anos, DP = 8,09 foi constituída por 109 estudantes do turno matutino e 125 do noturno. Preencheram ficha sócio-demográfica, Escala de Sonolência de Epworth e Índice de Qualidade de Sono de Pittsburgh. O rendimento acadêmico foi solicitado aos coordenadores dos cursos. Os resultados mostraram para sonolência média de 9,03 pontos (DP = 4,01 no turno matutino, e 9,7 (DP = 4,01 no noturno, e para qualidade do sono, 5,54 (DP = 2,99 e 5,53 (DP = 3,08, respectivamente. Foram constatadas diferenças significativas em sonolência (t = -29,55; p 0,05 e noturno (r = 0,03; p > 0,05. Os dados mostraram que os estudantes do turno noturno são mais sonolentos e possuem pior qualidade do sono, embora isso não influa sobre seu rendimento

  15. Is the population properly informed about sleep disorders? A população está devidamente informada sobre os distúrbios do sono?

    Directory of Open Access Journals (Sweden)

    Eleida Pereira Camargo

    2013-02-01

    Full Text Available OBJECTIVE: To measure the prior knowledge about sleep disorders and patient's ability to report their problems adequately to health professionals. METHODS: We analyzed 208 patient's records and extracted the following information: date of birth, gender, medical diagnostic hypotheses, patient's primary complaint in their words, considering the most appropriated semantic approximation to the perceptual phenomena, either by their own or by reasoning information from the partner. We compared the agreement (Kappa's test between patient's complaint and medical diagnosis. The 95% confidence interval was used to analyze proportions. RESULTS: We found strong correlations for bruxism; moderate for snoring, insomnia, nightmares, somniloquy, and restless legs syndrome; fair for excessive movement during sleep (EMDS and obstructive sleep apnea syndrome (OSA. CONCLUSIONS: The observed correlations were heterogeneous, but important diseases such as OSA and EMDS in children showed fair and weak correlations. This suggests an unsatisfactory knowledge level among the population about these disorders, despite their high prevalence and impact on patient's overall health.OBJETIVO: Avaliar o conhecimento da população investigada sobre os distúrbios do sono e sua capacidade de reportá-los adequadamente aos profissionais de saúde. MÉTODOS: Foram analisados ​​208 prontuários de pacientes, dos quais foram extraídos os seguintes dados: data de nascimento, sexo, hipótese diagnóstica médica e queixa principal do paciente. Foram comparadas as queixas e as hipóteses diagnósticas, considerando-se o intervalo de confiança de 95% para as proporções entre estas variáveis, determinando-se sua concordância por meio do teste Kappa. RESULTADOS: Foram encontradas concordâncias acentuadas em relação ao bruxismo; moderadas para ronco, insônia, pesadelos, sonilóquio e síndrome das pernas inquietas; concordância regular para movimentação excessiva durante o

  16. Is the population properly informed about sleep disorders? A população está devidamente informada sobre os distúrbios do sono?

    Directory of Open Access Journals (Sweden)

    Eleida Pereira Camargo

    2013-01-01

    Full Text Available OBJECTIVE: To measure the prior knowledge about sleep disorders and patient's ability to report their problems adequately to health professionals. METHODS: We analyzed 208 patient's records and extracted the following information: date of birth, gender, medical diagnostic hypotheses, patient's primary complaint in their words, considering the most appropriated semantic approximation to the perceptual phenomena, either by their own or by reasoning information from the partner. We compared the agreement (Kappa's test between patient's complaint and medical diagnosis. The 95% confidence interval was used to analyze proportions. RESULTS: We found strong correlations for bruxism; moderate for snoring, insomnia, nightmares, somniloquy, and restless legs syndrome; fair for excessive movement during sleep (EMDS and obstructive sleep apnea syndrome (OSA. CONCLUSIONS: The observed correlations were heterogeneous, but important diseases such as OSA and EMDS in children showed fair and weak correlations. This suggests an unsatisfactory knowledge level among the population about these disorders, despite their high prevalence and impact on patient's overall health.OBJETIVO: Avaliar o conhecimento da população investigada sobre os distúrbios do sono e sua capacidade de reportá-los adequadamente aos profissionais de saúde. MÉTODOS: Foram analisados ​​208 prontuários de pacientes, dos quais foram extraídos os seguintes dados: data de nascimento, sexo, hipótese diagnóstica médica e queixa principal do paciente. Foram comparadas as queixas e as hipóteses diagnósticas, considerando-se o intervalo de confiança de 95% para as proporções entre estas variáveis, determinando-se sua concordância por meio do teste Kappa. RESULTADOS: Foram encontradas concordâncias acentuadas em relação ao bruxismo; moderadas para ronco, insônia, pesadelos, sonilóquio e síndrome das pernas inquietas; concordância regular para movimentação excessiva durante o

  17. Qualidade de sono e função pulmonar em adolescentes portadores de anemia falciforme clinicamente estáveis Quality of sleep and pulmonary function in clinically stable adolescents with sickle cell anemia

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    Lisliê Capoulade Nogueira Arrais de Souza

    2007-06-01

    Full Text Available OBJETIVO: Avaliar a qualidade de sono e função pulmonar em adolescentes portadores de anemia falciforme (AF, clinicamente estáveis. MÉTODOS: Estudo trasversal descritivo de 50 pacientes portadores de AF submetidos a polissonografia noturna e espirometria no Hospital Universitário de Brasília. Analisamos dados antropométricos, polissonográficos e de função pulmonar. Dividimos os pacientes em dois grupos segundo a saturação periférica de oxigênio (SpO2 em sono com movimentos oculares rápidos (MOR: SpO2 93%. Realizamos estatística descritiva, teste t de Student, qui-quadrado e correlação de Pearson. RESULTADOS: A média de idade foi de 13,9 ± 2,5 anos. O tempo total de sono e percentagem do sono em MOR estavam diminuídos; dois pacientes (4% não apresentaram sono MOR. Latência de sono MOR, número de despertares, movimentação em sono, mudança de estágio, índice de distúrbios respiratórios e índice de apnéia obstrutiva estavam aumentados. Entre os dois grupos, houve diferenças estatisticamente significativas na maioria das variáveis polissonográficas. A SpO2 em sono MOR correlacionou-se de forma forte e positiva com a SpO2 em vigília, bem como com a SpO2 em sono não-MOR; e correlacionou-se de forma forte e negativa com a percentagem do tempo total de sono em que a SPO2 foi OBJECTIVE: To evaluate quality of sleep and pulmonary function in clinically stable adolescents with sickle cell anemia (SCA. METHODS: A cross-sectional descriptive study involving 50 patients with SCA submitted to nocturnal polysomnography and spirometry at the Brasília University Hospital. Anthropometric, polysomnographic and pulmonary function data were analyzed. Patients were divided into two groups according to oxygen saturation by pulse oximetry (SpO2 during rapid eye movement (REM sleep: SpO2 93%. Descriptive statistics, Student's t-test, chi-square test and Pearson's correlation coefficient were used. RESULTS: Mean age was 13.9 ± 2

  18. Electroencephalographic changes after one nigth of sleep deprivation Respostas eletrencefalográficas após uma noite de privação de sono

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    Camila Ferreira

    2006-06-01

    Full Text Available Total or partial sleep deprivation (SD causes degrading effects on different cognitive and psychomotor functions that might be related to electrophysiological changes frequently observed. In the present study, we investigated the effects of one night of sleep deprivation on waking EEG. Experimental protocol consisted of recording electroencephalographic data from eleven healthy young subjects before (baseline and after (time 2 one night of sleep deprivation. A natural log transformation was carried out and showed a significant increase in theta T6 (p=0.041, O2 (p=0.018 and OZ (p=0.028; and delta T6 (p=0.043 relative power; and a decrease in alpha Fp1 (p=0.040, F3 (p=0.013, Fp2 (p=0.033, T4 (p=0.050, T6 (p=0.018, O2 (p=0.011 and Oz (p=0.025 and beta (p=0.022 absolute power. These outcomes show that the EEG power spectra, after sleep deprivation, exhibit site-specific differences in particular frequency bands and corroborate for the premise of local aspects of brain adaptation after sleep deprivation, rather than global.Privação total ou parcial de sono causa efeitos deletérios em diferentes funções cognitivas e psicomotoras, que podem estar relacionados às mudanças eletrofísiológicas frequentemente observadas. No presente estudo, investigou-se os efeitos de uma noite de privação de sono nas respostas eletrencefalográficas de repouso. O protocolo experimental consistiu na coleta e gravação dos dados do qEEG de onze sujeitos jovens e saudáveis antes (momento baseline e após (momento 2 uma noite de privação de sono. Todos os dados sofreram transformação logarítmica, que evidenciou um aumento significativo nas potências relativas de teta T6 (p=0,041, O2 (p=0,018 e OZ (p=0,028; e delta T6 (p=0,043. As bandas de freqüência mais rápidas alfa Fp1 (p=0,040, F3 (p=0,013, Fp2 (p=0,033, T4 (p=0,050, T6 (p=0,018, O2 (p=0,011, Oz (p=0,025 e beta (p=0,022 apresentaram reduções significativas na potência absoluta. Os resultados

  19. Sono-chemical Synthesis Fe3O4-Mg(OH2 Nanocomposite and Its Photo-catalyst Investigation in Methyl Orange Degradation

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    G. Nabiyouni

    2014-10-01

    Full Text Available In this work firstly Fe3O4 nanoparticles were synthesized via a sono-chemical method. At the second step magnesium hydroxide shell was synthesized on the magnetite-core under ultrasonic waves. For preparation Fe3O4-MgO the product was calcinated at 400 ºC for 2h. Properties of the product were examined by X-ray diffraction pattern (XRD, scanning electron microscope (SEM and Fourier transform infrared (FT-IR spectroscopy. Vibrating sample magnetometer (VSM shows nanoparticles exhibit super-paramagnetic behavior. The photo-catalytic behavior of Fe3O4-Mg(OH2  nanocomposite was evaluated using the degradation of a methyl orange (MeO aqueous solution under ultraviolet (UV light irradiation. The results show that Fe3O4-Mg(OH2 nanocomposites have applicable magnetic and photo-catalytic performance.

  20. Sono, qualidade de vida e depressão em mulheres no pós-tratamento de câncer de mama

    OpenAIRE

    Rafihi-Ferreira,Renatha El; Pires,Maria Laura Nogueira; Soares,Maria Rita Zoéga

    2012-01-01

    Este trabalho investigou a qualidade de sono de mulheres com câncer de mama e suas relações com qualidade de vida e depressão. Cinqüenta mulheres com câncer de mama (grupo clínico) e cinqüenta controles responderam um questionário médico-demográfico e ao instrumento Pittsburgh Sleep Quality Index. O grupo clínico também respondeu aos instrumentos Quality of Life Cancer-Survivor e Brief Zung Self-Rating Depression Scale. Verificou-se que mulheres com câncer tinham significativamente mais queix...

  1. Fibromialgia: nível de atividade física e qualidade do sono Fibromyalgia: level of physical activity and quality of sleep

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    Raquel Munhoz da Silveira Campos

    2011-09-01

    Full Text Available O objetivo foi identificar o nível de atividade física e sua relação com sonolência excessiva diurna e qualidade de sono em 15 mulheres com fibromialgia, com idade média de 58±7 anos. Foi utilizado o Questionário Internacional de Atividade Física, o Índice de Qualidade de Sono de Pittsburgh e a Escala de Sonolência de Epworth. O programa SPSS Statistics versão 17 foi utilizado para as analises estatísticas e o valor para significância foi de α The objective was to identify the level of physical activity and its relation to excessive daytime sleepiness and sleep quality in 15 women with fibromyalgia and mean age 58 ± 7 years. We used the International Physical Activity Questionnaire, the Sleep Quality Index in Pittsburgh and Epworth Sleepiness Scale. We used SPSS Statistics Version 17 and the value for significance was α < 0.05. The results showed that 33,3% of patients rated themselves inactive and 66,7% minimally active. We observed excessive daytime sleepiness in 60% of patients. The poor quality of sleep was observed in 55,6% of patients in minimally active and 60% of inactive. The average time was 34,3 minutes to fall asleep, sleep efficiency was 81% and total sleep time was 5,9 hours. The low level of physical activity seems to be one of the factors that can worsen sleep quality in women with fibromyalgia.

  2. Heterogeneous sono-Fenton-like process using martite nanocatalyst prepared by high energy planetary ball milling for treatment of a textile dye.

    Science.gov (United States)

    Dindarsafa, Mahsa; Khataee, Alireza; Kaymak, Baris; Vahid, Behrouz; Karimi, Atefeh; Rahmani, Amir

    2017-01-01

    High energy planetary ball milling was applied to prepare sono-Fenton nanocatalyst from natural martite (NM). The NM samples were milled for 2-6h at the speed of 320rpm for production of various ball milled martite (BMM) samples. The catalytic performance of the BMMs was greater than the NM for treatment of Acid Blue 92 (AB92) in heterogeneous sono-Fenton-like process. The NM and the BMM samples were characterized by XRD, FT-IR, SEM, EDX and BET analyses. The particle size distribution of the 6h-milled martite (BMM 3 ) was in the range of 10-90nm, which had the highest surface area compared to the other samples. Then, the impact of main operational parameters was investigated on the process. Complete removal of the dye was obtained at the desired conditions including initial pH 7, 2.5g/L BMM 3 dosage, 10mg/L AB92 concentration, and 150W ultrasonic power after 30min of treatment. The treatment process followed pseudo-first order kinetic. Environmentally-friendly modification of the NM, low leached iron amount and repeated application at milder pH were the significant benefits of the BMM 3 . The GC-MS was successfully used to identify the generated intermediates. Eventually, an artificial neural network (ANN) was applied to predict the AB92 removal efficiency based upon the experimental data with a proper correlation coefficient (R 2 =0.9836). Copyright © 2016 Elsevier B.V. All rights reserved.

  3. Achados radiológicos em pacientes portadores de apneia obstrutiva do sono Radiological findings in patients with obstructive sleep apnea

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    Carlos Fernando de Mello Junior

    2013-02-01

    Full Text Available A apneia obstrutiva do sono (AOS é caracterizada por obstruções recorrentes das vias aéreas superiores durante o sono que ocorrem no nível da faringe. Apesar de a análise cefalométrica ser um importante método no diagnóstico das deformidades craniofaciais, a TC e a ressonância magnética vêm se destacando como os principais métodos de imagem para a investigação das eventuais causas da AOS que, na maioria das vezes, é multifatorial. Esses métodos permitem uma excelente avaliação nos diversos planos anatômicos do eventual sítio da obstrução, o que permite uma melhor avaliação clínica e abordagem cirúrgica. O presente ensaio pictórico tem como objetivo descrever os aspectos que devem ser avaliados no diagnóstico por imagem dos principais fatores predisponentes para a AOS.Obstructive sleep apnea (OSA is characterized by recurrent upper airway obstruction occurring at the level of the pharynx during sleep. Although cephalometric analysis is an important method in the diagnosis of craniofacial deformities, CT and magnetic resonance imaging have been highlighted as the major imaging methods to investigate the possible causes of OSA, which, in most cases, is multifactorial. Magnetic resonance and CT both allow an excellent evaluation of the various anatomical planes of the site of obstruction, which enables better clinical assessment and surgical approach. This pictorial essay aims to describe the aspects that must be evaluated in the diagnostic imaging of patients presenting with the major predisposing factors for OSA.

  4. Escala de sonolência de Epworth na síndroma de apneia obstrutiva do sono: uma subjetividade subestimada

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    C. Guimarães

    2012-11-01

    Full Text Available Resumo: A hipersonolência diurna é uma das manifestações mais relevantes da síndrome da apneia obstrutiva do sono (SAOS e pode ser avaliada quer por testes subjetivos quer por testes objetivos. A escala de sonolência de Epworth (ESE é um instrumento simples e validado que permite avaliar a sonolência diurna no contexto clínico de distúrbios do sono. No entanto, o seu caráter subjetivo pode condicionar a exata expressão do verdadeiro grau de sonolência. O uso clínico da ESE é demonstrado neste trabalho, mostrando que, no mesmo doente em momentos diferentes o score da ESE é díspar e como este score pode estar ou não relacionado em determinadas variáveis.Assim, comparamos o grau de sonolência basal com o grau de sonolência na mesma situação, mas avaliado retrospetivamente após tratamento com pressão positiva contínua das vias aéreas (Automatic Positive Airway Pressure – APAP.Realizamos um estudo prospetivo que incluiu 66 doentes observados na consulta de Patologia do Sono em que, após estudo poligráfico do sono ou cardiorrespiratório domiciliário, foi feito o diagnóstico de SAOS. Os doentes apresentavam uma idade média de 53,3 anos, sendo a maioria do sexo masculino (88%, n = 58. Os doentes preencheram o questionário da ESE no dia da primeira consulta (pré APAP e posteriormente, na consulta de seguimento, preencheram novamente a ESE referente ao período pós-tratamento com APAP e pediu-se, retrospetivamente, nova quantificação da ESE inicial. A média do score da ESE basal foi de 11,8, a retrospetiva de 15,4, com uma diferença média de 3,55 (p < 0,001 t-Test e após terapêutica com APAP 7,4. Não houve correlação entre a diferença do score da ESE (basal retrospetiva com a média de tempo de uso diário do APAP (horas, com o índice de apneia-hipopneia (IAH, com a SatO2 mínima registada

  5. Estudo comparativo de padrões de sono em trabalhadores de enfermagem dos turnos diurno e noturno Comparative study of sleep patterns in nurses working day and night shifts

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    Milva Maria Figueiredo de Martino

    2002-08-01

    Full Text Available Objetivo. Comparar os padrões de sono de enfermeiros dos turnos diurno e noturno em um hospital de Campinas (SP, Brasil. Métodos. Participaram 59 enfermeiros entre 23 e 59 anos. Para os enfermeiros do dia, analisou-se o sono noturno, e, para os da noite, os sonos diurno e noturno. Os informantes preencheram um diário do sono durante 1 semana, ao acordar. Foram analisados hora de ir deitar, de dormir, e de acordar; latência do sono; horas de sono noturno e diurno; cochilos; qualidade do sono; modo de acordar; e comparação do sono registrado no diário com o sono habitual. Também foram coletadas informações pessoais e profissionais. Resultados. O grupo diurno ia dormir às 23h36min e o grupo noturno, às 23h52min (P Objective. To compare sleep patterns in nurses working day and night shifts in a hospital in Campinas (SP, Brazil. Methods. Fifty-nine nurses between 23 and 59 years of age participated in the study. For day shift workers, the pattern of nocturnal sleep was examined; for night shift workers, nocturnal and diurnal sleep patterns were examined. During 1 week, participants filled out a sleep diary right after waking up. The following items were assessed: time going to bed, falling asleep, and waking up; sleep latency; duration in hours of nocturnal and diurnal sleep; naps; quality of sleep; mode of waking up; and comparison between the sleep recorded in the diary with the usual sleep. Personal and professional information was also collected. Results. Day shift workers went to bed at 23h36min, and night workers at 23h52min (P > 0.05. The nurses working a day schedule woke up earlier (7h3min than those working a night schedule when they slept at night (8h30min (P <= 0.004, Wilcoxon. Mean sleep latency was 23min26s for day shift nurses versus 22min50s for night shift nurses; the duration of nocturnal sleep was 7h11min and 9h6min, respectively. Only day workers took naps (mean 2h3min. The average diurnal sleep of night shift nurses

  6. Sleep disorders are associated with impulsivity in school children aged 8 to 10 years Distúrbios de sono associam-se com impulsividade em escolares de 8 a 10 anos de idade

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    Marilaine Medeiros

    2005-09-01

    Full Text Available CONTEXT: Sleep has an important function in the physical and emotional development of children. Some studies suggest an association between impulsivity and sleep disorders. However, little is known about this association in schoolchildren aged 8 to 10 years. METHOD: We studied 1180 children, 547 with sleep disorders (SD and 633 without SD (control group, classified with SD questionnaires. Within the SD group, 53 children with sleep-related respiratory disorders (SRRD and 521 children with non-respiratory sleep disorders (NRSD were analyzed. We acessed emotional indicators of impulsivity with Bender test. RESULTS: More SD children presented impulsivity than control group (pCONTEXTO: O sono tem função importante no desenvolvimento físico e emocional das crianças. Alguns estudos sugerem a associação de impulsividade e distúrbios do sono, sendo pouco conhecida esta associação em escolares na faixa etária de 8 a 10 anos. MÉTODO: Estudamos 1180 crianças, 547 com distúrbio do sono (DS e 633 normais (grupo controle, classificadas através de questionários sobre distúrbios do sono. Dentro do grupo DS, analisamos separadamente as crianças com distúrbio respiratório relacionado ao sono (DRRS e com distúrbios não respiratórios do sono (DNRS. Aplicamos o Teste Gestáltico de Bender (TB para detectar os indicadores emocionais de impulsividade. RESULTADOS: Maior número de crianças com DS apresentaram impulsividade em relação às crianças do grupo controle (p<0,05. Mais crianças de 10 anos de idade do grupo DNRS apresentaram impulsividade em relação ao grupo controle da mesma idade (p=0,001. Impulsividade e DRRS estiveram associados apenas entre as crianças de 8 anos de idade (p<0,05. CONCLUSÃO: Crianças com DS em geral, crianças com DRRS de 8 anos de idade, e crianças com 10 anos de idade do grupo DNRS apresentaram maior proporção de indicadores de impulsividade do que crianças do grupo controle.

  7. A genética dos distúrbios do sono na infância e adolescência The genetics of sleep disorders in childhood and adolescence

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    Magda Lahorgue Nunes

    2008-08-01

    Full Text Available OBJETIVO: O objetivo deste artigo é revisar a literatura sobre a genética dos distúrbios do sono na infância e adolescência. FONTES DOS DADOS: As palavras-chave "sono" e "genética" foram usadas para pesquisar por artigos publicados nos últimos cinco anos no banco de dados MEDLINE. A seguir, seus resumos foram analisados. A pesquisa também incluiu artigos clássicos, com a primeira descrição dos genes. SÍNTESE DOS DADOS: A recorrência familiar de muitos distúrbios do sono é um achado freqüente, mas loci genéticos foram descobertos para poucos deles. Descrevemos aqui distúrbios do sono transmitidos por herança genética e também aqueles que apresentam altos índices de recorrência familiar, apesar de nenhum gene específico haver sido encontrado. CONCLUSÕES: Apesar da maioria dos distúrbios do sono ainda não terem uma base molecular identificada, técnicas modernas são cada vez mais utilizadas para determinar a contribuição dos genes ao sono e aos seus distúrbios associados. A importância clínica destas descobertas pode estar relacionada com a melhoria de métodos diagnósticos, mas também como alvo para o desenvolvimento de medicações específicas.OBJECTIVE: To review the literature regarding the genetics of sleep disorders in childhood and adolescence. SOURCES: Articles published in the past 5 years were searched on MEDLINE using the keywords sleep and genetics. Abstracts were then analyzed. Classical articles with the first description of genes were also included. SUMMARY OF THE FINDINGS: We often find familial recurrence in many sleep disorders. However, gene loci were discovered for only a few of them. We describe sleep disorders transmitted by genetic heritance and also those in that, although a gene was not found, familial recurrence is high. CONCLUSION: Although most of the sleep disorders do not have by now an identified molecular basis, modern techniques are being increasingly applied to determine the

  8. Padrões de sono de estudantes ingressantes na Graduação em Enfermagem Padrones de sueño de estudiantes de enfermería en lo primero-año Sleep patterns of first-year nursing students

    OpenAIRE

    Renata Furlani; Maria Filomena Ceolim

    2005-01-01

    Trata-se de estudo exploratório e descritivo com o objetivo de identificar os padrões de sono de estudantes ingressantes na graduação. Desenvolvido na Universidade Estadual de Campinas SP, os dados foram coletados em dois momentos distintos por meio do Índice de Qualidade de Sono de Pittsburgh. Durante as férias, os estudantes apresentaram melhor qualidade/ duração de sono e adoção de horários mais condizentes com seu cronotipo. Após o início das aulas, maior número apresentou sono de má qual...

  9. Síndrome da apneia obstrutiva do sono em motoristas de caminhão Obstructive sleep apnea syndrome in truck drivers

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    Lucia Castro Lemos

    2009-06-01

    Full Text Available OBJETIVO: Estimar a prevalência da síndrome da apneia obstrutiva do sono (SAOS e verificar os fatores associados à chance de desenvolver SAOS em motoristas de caminhão. MÉTODOS: A população desse estudo constituiu-se de motoristas de caminhão de duas filiais de uma empresa transportadora (n = 209, com idade média de 38,8 anos, sendo 98,5% do sexo masculino. O índice de massa corpórea médio foi de 26,5 ± 4,4 kg/m². Os participantes responderam questionários sobre dados sociodemográficos, atividade física e SAOS. A prevalência de SAOS foi estimada por meio do Questionário de Berlim e sua associação com os fatores estudados foi verificada pela análise de regressão univariada e multivariada. RESULTADOS: A prevalência de SAOS na população foi de 11,5%. Dos 209 motoristas, 72 (34,5% referiram dormir ao volante enquanto dirigiam ao menos uma vez e 81 (38,7% referiram roncar durante o sono. As variáveis estatisticamente significativas associadas à SAOS foram vínculo empregatício informal (OR = 0,27; p = 0,01, índice de massa corpórea > 25 kg/m² (OR = 13,64; p = 0,01 e qualidade do sono ruim (OR = 3,00; p = 0,02. CONCLUSÕES: Apesar de a prevalência de SAOS ter sido inferior à observada em outros estudos com motoristas, essa prevalência é superior à da população em geral. Os resultados ainda sugerem que as características do trabalho, entre as quais o vínculo de trabalho, estão associadas à SAOS. Esses dados evidenciam a relevância de se levar em consideração a atividade de trabalho em estudos que investiguem fatores associados à SAOS.OBJECTIVE: To determine the prevalence of obstructive sleep apnea syndrome (OSAS, as well as to identify factors associated with a greater risk of developing OSAS, among truck drivers. METHODS: The study population comprised 209 truck drivers (mean age, 38.8 years; 98.5% males at two branches of a transportation company. The mean body mass index was 26.5 ± 4.4 kg/m². The

  10. Pontas positivas occipitais transitórias no eletrencefalograma de pacientes epilépticos submetidos a privação do sono Sleep occipital positive transient spikes seen at EEG of epileptic patients submitted to sleep deprivation

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    Gilson Edmar Gonçalves e Silva

    2007-06-01

    Full Text Available OBJETIVO: Comparar o aparecimento do grafoelemento de ponta positiva occipital transitória do sono em eletrencefalograma (EEG de pacientes epilépticos com e sem privação do sono, como método de ativação. MÉTODO: Foram analisados 40 EEG de 20 pacientes epilépticos com idade variando de 12 a 43 anos sendo 60% do sexo masculino, atendidos no Hospital das Clínicas da Universidade Federal de Pernambuco, no período de 1995 a 2000. Foram incluídos pacientes com epilepsia diagnosticada clinicamente e EEG sem alteração. Cada paciente foi submetido a um EEG sem privação de sono e outro após 36 horas de privação. O registro dos dois EEG foi separado por intervalo de 48 horas, obedecendo ao protocolo padrão. O efeito da privação do sono foi avaliado pelo aparecimento do grafoelemento PPOTS durante o estágio NREM do sono. RESULTADOS: No EEG sem privação do sono, a PPOTS foi identificada em 6 (30% pacientes no estágio I e em 1 (5% paciente em ambos os estágios I e II NREM. Após privação do sono, PPOTS estiveram ausentes em apenas um paciente, mas presentes em 25% casos no estágio I NREM e em 70%, nos estágios I e II NREM. CONCLUSÃO: O aumento da freqüência de PPOTS após privação do sono, parece indicar a existência da liberação de neurotransmissores excitatórios, o que pode contribuir significativamente para a investigação da excitabilidade cerebral.OBJECTIVE: To compare the presence of "sleep occipital positive transient spikes" (SOPTS in the electroencephalogram (EEG of epileptic patients without sleep deprivation (SD to those with SD, as an activation method. METHOD: The author analyzed 40 EEG of 20 epileptic patients, aging from 12 to 43 years, 60%, males. Those patients were attempted at the Clinics Hospital of Universidade Federal de Pernambuco, from 1995 to 2000. Every patient included in this study had epilepsy clinically diagnosed and all EEG without abnormalities. Each subject was submitted to one EEG

  11. Sleep quality in type 2 diabetics Calidad del sueño en diabéticos tipo 2 Qualidade do sono em diabéticos do tipo 2

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    Maria Carolina Belo da Cunha

    2008-10-01

    Full Text Available Sleeping disorders in type 2 diabetic patients constitute risk factors for aggravating diabetes since they can affect the metabolic control through insulin resistance syndrome. This was an observational, cross-sectional study. The majority (52% of subjects had scores indicating poor sleep quality. The Pittsburgh Sleep Quality Index (PSQI scores showed patients with a time after diagnosis over 10 years and hypertension had the poorest sleep quality. For those with hemoglobin A1c > 7% taking sleeping medicines and those who had normal body mass index (BMI, the sleep quality was even poorer. The findings of the present study reinforce the relevance of this topic since there are no specific tools for sleep evaluation of type 2 diabetics making it difficult to make any assertions on the sleep quality of these patients.Los disturbios del sueño en diabéticos del tipo 2, constituyen factores de riesgo para el agravamiento de la diabetes, pues pueden interferir en el control metabólico a través del síndrome de la resistencia a la insulina. El estudio fue del tipo observacional-transversal. La calidad del sueño fue investigada en 50 diabéticos del tipo 2, a quienes se aplicó el Índice de Calidad del Sueño de Pittsburgh (PSQI. La mayoría (52% presentó puntuaciones del PSQI, que indican calidad del sueño mala. Aquellos con tiempo de diagnóstico superior a 10 años y con hipertensión poseían peor calidad del sueño. Para aquellos con valores de Hemoglobina A1c > 7%, que usaban medicamentos para dormir y los que presentaron IMC normal, la calidad del sueño se mostró peor. Lo encontrado en esta investigación refuerza la relevancia de la temática, ya que no existen instrumentos específicos para evaluar el sueño del diabético del tipo 2, dificultando afirmaciones sobre la calidad del sueño del diabético.Distúrbios do sono em diabéticos do tipo 2 constituem fatores de risco para o agravamento do diabetes, pois podem interferir no

  12. Síndrome da apnéia-hipopnéia obstrutiva do sono. Fisiopatologia Physiopathology of obstructive sleep apnea-hypopnea syndrome

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    Andrea Barral Martins

    2007-02-01

    Full Text Available A fisiopatogenia da apnéia obstrutiva do sono é multifatorial. O sexo, a obesidade, os fatores genéticos, anatômicos e hormonais e o controle da ventilação interagem diversamente na fisiopatogenia e expressão clínica da doença. A obesidade é o principal fator de risco, sendo a elevação do índice de massa corpórea, da gordura visceral e da circunferência do pescoço, fortes preditores de sua ocorrência. A progesterona, por aumentar a atividade dos músculos dilatadores das vias aéreas superiores, tem papel protetor nas mulheres antes da menopausa, justificando a maior prevalência da doença na pós-menopausa, no sexo masculino e na síndrome dos ovários policísticos. Evidências apontam para o fato de que o aumento da idade promove diminuição do tônus muscular, com redução da luz das vias aéreas superiores. O dismorfismo crânio-facial, como na retrognatia ou micrognatia, está associado ao posicionamento posterior da língua, e pode resultar em estreitamento da luz das vias aéreas superiores. Finalmente, comando ventilatório reduzido tem sido detectado em pacientes com síndrome de apnéia obstrutiva do sono e hipercapnia.The physiopathology of obstructive sleep apnea syndrome is multifactorial. Gender and obesity status, as well as genetic, anatomic, and hormonal factors, together with ventilatory drive, interact in a diverse manner in the physiopathology and clinical expression of the disease. Obesity is the main risk factor, since increases in body mass index, visceral fat, and neck circumference are strong predictors of the disease. Progesterone increases the activity of the upper airway dilator muscles and therefore plays a protective role in premenopausal women. This explains the fact that the prevalence of the disease is higher in postmenopausal patients, in patients with polycystic ovary syndrome, as well as in males. Evidence supports the fact that, as individuals grow older, there is a decrease in muscle

  13. Cognitive dysfunction in children with sleep disorders Disfunção cognitiva em crianças com distúrbios do sono

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    Luciane Bizari Coin de Carvalho

    2004-06-01

    Full Text Available Sleep is basic for physical and cognitive development and some studies have suggested that there may be an association between sleep disorders (SD and cognitive dysfunction (CD in children. Little is known, however, about SD and cognition in 7-10-year-old children, a fact that motivated the present study. METHOD: We applied an SD questionnaire in 1180 children, 547 with SD and 633 without SD (CG, to assess cognition with a screening test (Bender Visual Motor Gestalt Test - BT. RESULTS: We observed a similar frequency of CD in the children with SD (39% and that ot the CG (40%. The 8-year-old children with SD presented a lower prevalence of CD than the CG (SD=6%, n=6; CG=13%, n=16; p=0.04. CONCLUSION: The frequency of children with CD was equal in the study and control groups when considering the total sample (7- to 10-year-old children. In contrast to our expectations, the SD group of 8-year-old children presented a lower frequency of CD than the control group.O sono é fundamental no desenvolvimento físico e cognitivo, vários estudos na literatura sugerem haver associação entre distúrbio do sono (DS e disfunões cognitivas (DC em crianças. Pouco se sabe, no entanto, sobre DS e cognição na faixa etária de 7 a 10 anos, motivo porque empreendemos este estudo. MÉTODO: Aplicamos um questionário de DS em 1180 crianças: 547 com DS e 633 sem DS (GC, avaliandose cognição pelo Teste Gestáltico de Bender (TB. RESULTADOS: Observamos proporção semelhante de DC nas crianças com DS (39% e nas do GC (40%. As crianças de 8 anos do DS apresentaram menor prevalência de DC do que as do GC (DS=6%, n=6; GC=13%, n=16; p=0,04. CONCLUSÃO: A proporção de crianças com DC foi igual nos grupos estudo e controle quando consideramos a amostra total (crianças de 7 a 10 anos. Contrariando nossas expectativas, o grupo DS de 8 anos apresentou menos DC que o grupo controle.

  14. Siestas among Brazilian native Terena adults: a study of daytime napping Sono diurno em indígenas Terena: um estudo da sesta

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    RUBENS REIMÃO

    2000-03-01

    Full Text Available Regular daytime napping behavior, also known as siesta culture, is influenced by circadian, cultural and environmental factors. This research analyzes characteristics of regular daytime napping in Brazilian Native Terenas. We evaluared 65 adults ( 32 M; 33 F from 18 to 75 years, with a mean age of 37.2, from the Indian Reservation village Córrego do Meio, in the central region of Mato Grosso do Sul. Daytime napping characteristics were evaluated by means of a standard questionnaire applied to each individual. It was observed that weekly daytime napping (at least once a week was present in 72.3% of the population. There was a tendency to occur in males. The effects of weekends was mild. Mean onset time of daytime sleep was 12.2 h, remarkably earlier than usually described in urban populations. This data stresses the need to consider ethnic influences in order to understand sleep habits.O comportamento de dormir regularmente durante o dia, denominado cultura de sesta, é influenciado por fatores circadianos, culturais e ambientais.Esta pesquisa buscou verificar as características do sono diurno regular em indígenas Terena. Avaliamos 65 adultos (32 M; 33 F de 18 a 75 anos de idade (média 37,2 anos da aldeia Córrego do Meio, situada em reserva indígena na região central de Mato Grosso do Sul. As características do sono diurno foram avaliadas por meio de questionário padronizado. Como resultado, verificamos que 72,3% dos indivíduos apresentavam sesta, pelo menos uma vez por semana. Este hábito tendeu a ser mais encontrado no sexo masculino. Apenas 9,2% referiram sesta só nos fins de semana. O horário de sesta foi acentuadamente mais cedo do que o descrito em populações urbanas, iniciando a sesta em média às 12,2 h. É necessário ponderar as influências étnicas para compreender as características do dormir.

  15. Avanços recentes do impacto da apneia obstrutiva do sono na hipertensão arterial sistêmica

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    Rodrigo P. Pedrosa

    2011-08-01

    Full Text Available A apneia obstrutiva do sono (AOS é uma condição clínica comum na população em geral, principalmente entre os pacientes portadores de doenças cardiovasculares. Mais do que um fenômeno local de obstrução das vias aéreas superiores, a AOS traz repercussões sistêmicas que podem incluir a hipóxia intermitente, a redução abrupta da pressão intratorácica e a ocorrência de microdespertares com fragmentação do sono. Nas últimas décadas, inúmeras evidências apontam de forma consistente a AOS como um importante fator envolvido na ocorrência de doenças cardiovasculares. Particularmente, a relação entre a AOS e a hipertensão arterial sistêmica (HAS é a que encontra um maior conjunto de evidências. Atualmente, encontram-se dados que consideram a AOS uma importante causa secundária de HAS. Mais do que isso, a AOS está independentemente associada a um pior controle pressórico, alteração do descenso noturno da pressão arterial e à presença de lesões de órgãos-alvo, tais como a hipertrofia do ventrículo esquerdo e a microalbuminúria. Estudos randomizados sugerem que o tratamento da AOS, especialmente com a pressão positiva contínua de vias aéreas superiores (CPAP, considerado o tratamento padrão para a AOS, promove redução significante da pressão arterial nas 24 horas, efeito esse mais significante no subgrupo de pacientes com HAS não controlada e nos pacientes com HAS resistente. A despeito de todas essas evidências, a AOS ainda continua sendo subdiagnosticada. O objetivo desta revisão é discutir os recentes avanços nos mecanismos fisiopatológicos, na apresentação clínica e no tratamento da AOS, e o benefício sobre a pressão arterial.

  16. Síndrome da apneia obstrutiva do sono (Saos e sonolência diurna excessiva (SDE: influência sobre os riscos e eventos de queda em idosos

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    Renata Afonso Burgos

    Full Text Available INTRODUÇÃO: Muitos países vêm experimentando o processo de envelhecimento populacional e a consequente elevação das doenças associadas a ele, como dificuldade de manter o equilíbrio, perdas na qualidade do sono e síndrome da apneia obstrutiva do sono (Saos. OBJETIVOS:Investigar a correlação entre a Saos e sonolência diurna excessiva (SDE com os riscos e eventos de quedas em indivíduos idosos. MATERIAIS E MÉTODOS:Estudo descritivo, comparativo, de corte transversal com amostra de 75 indivíduos com idade igual ou superior a 60 anos, gêneros masculino e feminino. Foram utilizados o mini-exame do estado mental; escalas de depressão geriátrica simplificada; de sonolência de epworth; de avaliação do equilíbrio de tinneti; índice de massa corporal (IMC; registros estabilométricos das oscilações posturais ântero-posterior (AP e médio-lateral (ML. RESULTADOS: Maior prevalência de Saos no gênero masculino. Não foi encontrada correlação com significância estatística (Pearson, p ≤ 0,01 entre as variáveis IMC e estabilometria. Não houve correlação estatisticamente significativa (ANOVA, p ≤ 0,05 entre IMC (subgrupos normal, sobrepeso, graus I, II, III, e IV e estabilometria; entre os graus de severidade de Saos e estabilometria; entre dados estabilométricos de subgrupos de IMC e mesmo grau de severidade de Saos; entre dados estabilométricos de subgrupos de IMC e diferentes graus de Saos; entre os diferentes graus de Saos (GC, G1, (GC e G2, subgrupos de IMC e registros estabilométricos. CONCLUSÃO: Não foram encontrados resultados que corroborassem a hipótese de proporcionalidade entre graus de severidade de Saos, IMC e registro estabilométrico.

  17. Perturbação respiratória durante o sono em doença pulmonar obstrutiva crônica Respiratory disturbance during sleep in chronic obstructive pulmonary disease

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    Ana C. Krieger

    2005-04-01

    Full Text Available A doença pulmonar obstrutiva crônica é uma condição freqüente e é hoje a quarta principal causa de mortes nos Estados Unidos. A prevalência de perturbação respiratória durante o sono, ou síndrome de superposição, como anteriormente denominada, ainda não foi determinada devido à publicação de relatos conflitantes. Esta condição deve continuar sendo investigada devido aos efeitos adversos causados por transtornos respiratórios relacionados ao sono em pacientes com doença pulmonar de base. Neste relato, discutiremos brevemente os mecanismos envolvidos na origem da perturbação respiratória durante o sono em doença pulmonar obstrutiva crônica e auxiliaremos o leitor a distinguir àqueles pacientes que se beneficiariam de uma avaliação do padrão do sono mais detalhada, com a discussão de tópicos de gerenciamento e opções de tratamento.Chronic obstructive pulmonary disease is a prevalent condition and is currently the forth leading cause of mortality in the US. The prevalence of respiratory disturbance during sleep, or overlap syndrome as it was commonly known in the past, is still undetermined as conflicting reports have been published. Because of the adverse effects of sleep-related respiratory impairment in patients with underlying pulmonary disease, this condition deserves further investigation. In this report, we will briefly discuss the mechanisms involved in generating respiratory disturbance during sleep in Chronic Obstructive Pulmonary Disease and will guide the reader into distinguishing those patients who would benefit from a more detailed sleep evaluation, discussing management issues and treatment options.

  18. Sleep disturbances in 50 children with attention-deficit hyperactivity disorder Distúrbios do sono em 50 crianças com transtorno do déficit de atenção e hiperatividade

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    Sergio Nolasco Hora das Neves

    2007-06-01

    Full Text Available OBJECTIVE: This study assesses the relationship between sleep disturbances (SD and attention-deficit and hyperactivity disorder (ADHD to characterize clinical features and associated problems. METHOD: The medical records of 50 children and adolescents ranging in age from 4 to 17 years with ADHD without the diagnosis of mental retardation or pervasive developmental disorders were reviewed. RESULTS: Significant relationships were found between SD and drug therapy (pOBJETIVO: Avaliar a associação entre transtorno do déficit de atenção e hiperatividade (TDAH e distúrbios do sono para caracterizar fatores clínicos e problemas associados. MÉTODO: Foram revistos prontuários de 50 crianças e adolescentes com idade entre 4 e 17 anos e consecutivo diagnóstico de TDAH sem diagnóstico de retardo mental ou transtornos invasivos do desenvolvimento. RESULTADOS: Foram encontradas associações significativas entre alterações do sono e farmacoterapia (p<0,01, comorbidade (p<0,01 e maior aderência ao tratamento prescrito para sintomas de TDAH (p<0,05. CONCLUSÃO: Os resultados deste estudo sugerem que alterações do sono são relevantes em crianças com TDAH e podem estar associadas a aumento dos sintomas.

  19. Influence of ultrasound power on acoustic streaming and micro-bubbles formations in a low frequency sono-reactor: mathematical and 3D computational simulation.

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    Sajjadi, Baharak; Raman, Abdul Aziz Abdul; Ibrahim, Shaliza

    2015-05-01

    This paper aims at investigating the influence of ultrasound power amplitude on liquid behaviour in a low-frequency (24 kHz) sono-reactor. Three types of analysis were employed: (i) mechanical analysis of micro-bubbles formation and their activities/characteristics using mathematical modelling. (ii) Numerical analysis of acoustic streaming, fluid flow pattern, volume fraction of micro-bubbles and turbulence using 3D CFD simulation. (iii) Practical analysis of fluid flow pattern and acoustic streaming under ultrasound irradiation using Particle Image Velocimetry (PIV). In mathematical modelling, a lone micro bubble generated under power ultrasound irradiation was mechanistically analysed. Its characteristics were illustrated as a function of bubble radius, internal temperature and pressure (hot spot conditions) and oscillation (pulsation) velocity. The results showed that ultrasound power significantly affected the conditions of hotspots and bubbles oscillation velocity. From the CFD results, it was observed that the total volume of the micro-bubbles increased by about 4.95% with each 100 W-increase in power amplitude. Furthermore, velocity of acoustic streaming increased from 29 to 119 cm/s as power increased, which was in good agreement with the PIV analysis. Copyright © 2014 Elsevier B.V. All rights reserved.

  20. Síndroma de apneia obstrutiva do sono como causa de acidentes de viação

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    M. Aguiar

    2009-05-01

    Full Text Available Resumo: Vários estudos demonstram que os doentes com síndroma de apneia obstrutiva do sono (SAOS têm um risco aumentado de acidentes de viação. O objectivo do presente trabalho consistiu em analisar, nestes doentes, se há diferenças nos que referem acidentes e/ /ou quase acidentes e aqueles que o não fazem.Material e métodos: Estudaram-se prospectivamen-te 163 doentes com SAOS (índice apneia/hipopneia (IAH>10/h diagnosticados por polissonografia noc-turna (PSG, todos condutores de veículos, 18,4% do quais profissionais. Na altura da entrevista clínica foi inquirido se tinham tido, nos três anos antes acidentes e/ou quase acidentes devido a hipersonia diurna (Grupo II=74 ou não (Grupo I=89.Estes dois grupos foram comparados quanto a: idade, índice de massa corporal (IMC, escala de sonolência de Epworth (ESE, PaO2 e PaCO2 diurnas, avaliação da qualidade de vida pelo inquérito Functional Outcomes of Sleep Questionnaire (FOSQ teste e dados da polissonografia – tempo total de sono (TTS, eficiência do sono, estádios do sono, índice de microdespertares (IMD, índice de apneia/hipopneia (IAH, SaO2 mínima e média, % tempo SaO210/h diagnosed using nocturnal polysomnography (NPSG, all drivers, 18.4% of whom drove for a living. Patients were asked at their first clinical interview to self-report road traffic accidents and/or near misses over the past 3 years which had been caused by abnormal daytime drowsiness. This allowed patients to be divided into two groups, those who had had road traffic accidents and/or near misses and those who had not. Both were compared as to age, body mass index (BMI, Epworth Sleepiness Scale (ESS, daytime PaO2 and PaCO2, Functional Outcomes of Sleep Questionnaire (FOSQ test and NPSG data. This latter was total sleep time (TTS, sleep efficiency, sleep stages, arousal index (ARI, AHI, minimal and average SaO2, % of time with SaO2<90% (T90, desaturation

  1. Big endotelina-1 e óxido nítrico em pacientes idosos hipertensos com e sem síndrome da apneia-hipopneia obstrutiva do sono

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    Iara Felicio Anunciato

    2013-10-01

    Full Text Available FUNDAMENTO: O papel do estresse oxidativo em pacientes idosos hipertensos com síndrome de apneia-hipopneia obstrutiva do sono (SAHOS é desconhecido. Objetivo: O objetivo foi avaliar os níveis de Big Endotelina-1 (Big ET-1 e Óxido Nítrico (NO em pacientes idosos hipertensos com e sem SAHOS moderada a grave. MÉTODOS: Os voluntários permaneceram internados durante 24 horas. Obtivemos os seguintes dados: índice de massa corporal (IMC, Monitorização Ambulatorial da Pressão Arterial (MAPA - 24 horas, e medicação atual. Sangue arterial foi coletado às 7:00 h e às 19:00 h para determinar níveis plasmáticos de NO e Big ET-1. A oximetria de pulso foi realizada durante o sono. A correlação de Pearson, Spearman e análise de variância univariada foram utilizadas para a análise estatística. RESULTADOS: Foram estudados 25 sujeitos com SAHOS (grupo 1 e 12 sem SAHOS (grupo 2, com idades de 67,0 ± 6,5 anos, 67,8 ± 6,8 anos, respectivamente. Não foram observadas diferenças significativas entre os grupos em IMC; no número de horas de sono; PA diastólica e sistólica em 24 h; PA de vigília; PA no sono; ou medicamentos usados para controlar a PA. Não foram detectadas diferenças nos níveis de NO e Big ET-1 plasmáticos às 19:00 h, mas às 7:00 h os níveis de de Big ET-1 foram mais altos (p = 0,03. No grupo 1, correlação negativa também foi observada entre a saturação de oxihemoglobina arterial média e a PA sistólica - 24 horas (p = 0,03, r = -0,44, e Big ET-1 (p = 0,04, r = 0,41. CONCLUSÕES: Na comparação entre idosos hipertensos com e sem SAHOS com PA e IMC semelhantes, observou-se níveis mais elevados de Big ET-1 após o sono no grupo SAHOS. Os níveis de NO não diferiram entre os pacientes hipertensos com ou sem SAHOS.

  2. Sleep disturbances and prevalence of depression in systemic lupus erythematosus patients receiving intravenous cyclophosphamide Alterações do sono e prevalência de depressão em pacientes lúpicos em uso de pulsoterapia com ciclofosfamida

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    Rafael Carvalho Mesquita

    2007-12-01

    Full Text Available BACKGROUND: Pulse i.v. cyclophosphamide is a therapeutic option in severe forms of systemic lupus erythematosus (SLE. However, the overall toxicity and risk profile are yet to be adequately defined. OBJECTIVE: To evaluate the occurrence of sleep disturbances in SLE patients subjected to i.v. cyclophosphamide. METHODS: We studied thirty consecutive SLE patients (27 female age range 14 to 53 years (mean 30.5 ± 10 years that received i.v. cyclophosphamide (mg (mean 948.27 ± 221.39. Depressive symptoms, quality of sleep, and the presence of excessive daytime sleepiness were evaluated. Disease severity was assessed by the SLEDAI. Quality of sleep was assessed by the Pittsburgh Sleep Quality Index (PSQI and excessive daytime sleepiness (EDS by the Epworth Sleepiness Scale (ESS. Depressive symptoms were evaluated using the 21-item Beck Depression Inventory (BDI. RESULTS: SLEDAI values ranged from 2 to 46 (mean 17 ± 11.4. The most common comorbidities were systemic arterial hypertension (30%, anemia (23.3%, osteoporosis (23.3%, and cardiomyopathy (6.6%. Seizures occurred in one patient (3.3%. Poor quality of sleep (PSQI e" 6 and EDS (ESS >10 were found in 66.7% and 30% of the patients, respectively. Depressive symptoms (BDI >19 were present in 40% of the patients and were associated with poor sleep quality (P = 0.03. CONCLUSIONS: Our findings show an increased prevalence of poor sleep quality and depressive symptoms in SLE patients receiving pulse i.v. cyclophosphamide. These findings were similar to other previously reported series of SLE patients regardless of the therapies used.INTRODUÇÃO: O uso de ciclofosfamida endovenosa é uma opção terapêutica nas formas graves de lúpus eritematoso sistêmico (LES. No entanto, a toxicidade e o perfil de risco ainda não estão adequadamente definidos. OBJETIVO: Avaliar sobre a ocorrência de alterações do sono em pacientes portadores de LES submetidos à terapia com ciclofosfamida endovenosa. M

  3. Avaliação comportamental em crianças com disturbios obstrutivos do sono Behavioral evaluation in children with obstructive sleep disorders

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    Sandra Fumi Hamasaki Uema

    2006-02-01

    Full Text Available Os distúrbios obstrutivos do sono são relativamente freqüentes na população pediátrica. Em crianças, SAOS resultaria em conseqüências clínicas significantes, incluindo atraso do crescimento, disfunção ventricular direita e esquerda e problemas de aprendizagem e comportamento. OBJETIVO: Avaliar o comportamento em crianças com distúrbio obstrutivo do sono. MATERIAL E MÉTODO: Pais de crianças de 4 a 18 anos de idade do Centro do Respirador Bucal da UNIFESP-EPM de janeiro a julho de 2005. Foi aplicado o CBCL/4-18 (Child Behavioral Checklist ou inventário de comportamento de crianças e adolescentes. RESULTADOS: Foram avaliadas 20 crianças. Dessas, 12 eram meninos e 8, meninas. O escore total do problema foi anormal em 5 crianças (25%. A escala de introversão foi anormal em 2 pacientes (10%. A escala de extroversão foi anormal em 5 pacientes (25%. As escalas de síndromes individuais foram anormais entre 0 e 20% dos pacientes. As escalas individuais que foram mais afetadas são as seguintes: competência total (20%, queixas somáticas (10%, problemas sociais (10% e comportamento agressivo (10%. DISCUSSÃO: Este estudo demonstra alta prevalência (25% de comportamento anormal. Embora largamente citado como uma complicação comum de SAOS na infância, distúrbios comportamentais e neurocognitivos têm sido inferidos em séries de casos e estudos. Existem poucos trabalhos usando medidas padronizadas para avaliar os distúrbios comportamentais e de desenvolvimento.AIM: The purpose of this study was to evaluate the behavior in children with obstructive sleep disorder. STUDY DESIGN: Prospective study. MATERIAL AND METHOD: Children’s parents (4 to 18 years old completed the CBCL4/18 (Child Behavior Checklist in the period of January to July 2005. RESULTS: In the group, 12 (60% were males and 8 (40% females; the total problem score was abnormal in 5 children (25%; introversion was affected in 2 children (10%; extroversion in 5

  4. Hipersonolência diurna e variáveis polissonográficas em doentes com síndroma de apneia do sono Daytime sleepiness and polysomnographic variables in sleep apnoea patients

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    O Mediano

    2007-12-01

    Full Text Available A síndroma de apneia obstrutiva do sono (SAOS caracteriza-se por episódios repetidos de obstrução da via aérea superior, hipoxemia nocturna e fragmentação do sono. A hipersonolência diurna constitui um sintoma frequente nos doentes com esta síndroma, embora possa estar ausente. A sua presença representa uma limitação significativa da qualidade de vida do indivíduo, bem como um aumento da morbilidade e mortalidade da SAOS, visto ser um importante factor de risco para acidentes de viação e laborais, podendo originar alterações cognitivo-comportamentais relevantes. O mecanismo desencadeante de hipersonolência diurna não é claro. Alguns autores relacionaram esta com a arquitectura anormal do sono, o que, no entanto, não foi confirmado por outros investigadores. Alguns estudos salientaram a relação entre a hipersonolência diurna e os níveis de dessaturação nocturna da oxi-hemoglobina, mas este facto não foi comprovado cientificamente. O objectivo do presente trabalho foi analisar quais os mecanismos responsáveis pela sonolência diurna nos doentes com SAOS. Assim, numerosas variáveis registadas no estudo polissonográfico foram comparadas em dois grupos de indivíduos com esta patologia, apresentando um deles hipersonolência diurna inequívoca e o outro a total ausência da mesma. Foram avaliados 65 indivíduos seguidos no Departamento Respiratório do Hospital Universitário do Son Dureta (Palma de Maiorca que possuíam no registo poligráfico nocturno um índice de apneia/hipopneia (IAH >20/h. A sonolência excessiva foi determinada utilizando a escala de sono de Epworth (ESE e o teste de latência múltipla. A sua presença foi considerada sempre que o score de ESE >10 e o score do teste de latência múltipla 10 min. Cerca de 25 indivíduos foram excluídos devido a discrepância entre os resultados das referidas determinações. Dos 40 doentes restantes, 23 apresentavam hipersonolência diurna e 17 não. Nenhum dos

  5. [La combinazione di gemcitabina e oxaliplatino (GEMOX) nel trattamento del carcinoma pancreatico in fase avanzata di malattia: le notizie sulla mia morte sono state esagerate?

    Science.gov (United States)

    Giuliani, Jacopo; Bonetti, Andrea

    2017-12-01

    Riassunto. L'analisi è stata condotta al fine di valutare l'effetto sia sulla sopravvivenza globale (OS) sia sulla sopravvivenza libera da progressione di malattia (PFS) della chemioterapia di combinazione in prima linea per il carcinoma pancreatico in fase avanzata di malattia. La presente analisi è limitata agli studi randomizzati controllati (RCT) di fase III. Successivamente è stata applicata la European Society for Medical Oncology Magnitude of Clinical Benefit Scale (ESMO-MCBS) agli RCT di fase III analizzati per ricavare uno score relativo all'entità del beneficio clinico ottenuto per ciascun RCT. Sono state calcolate inoltre le differenze in termini di PFS tra i diversi bracci di trattamento rapportandole con i costi dei farmaci necessari per ottenere il beneficio di PFS. La nostra analisi ha valutato 11 RCT di fase III, per un totale di 4572 pazienti. Combinando i costi della terapia con la misura dell'efficacia espressa dalla PFS, è stato ottenuto un costo di 74,12 euro (€) per mese di vita guadagnato in termini di PFS con la combinazione di 5-fluorouracil, leucovorin, irinotecan e oxaliplatino (FOLFIRINOX), 90,14 € per la combinazione di gemcitabina e oxaliplatino (GEMOX) e 4708,7 € per la combinazione di nab-paclitaxel e gemcitabina. Da questo punto di vista riteniamo che l'utilizzo delle "vecche chemioterapie di combinazione" (per es., GEMOX) non dovrebbe essere completamente abbandonato, ma valutato sul singolo paziente, sulla base di diversi fattori (età, ECOG PS, comorbilità, carico di malattia), al fine di ottenere una reale "tailored therapy".

  6. Horas de sono e índice de massa corporal em pré-escolares do sul do Brasil Sleep duration and body mass index among southern Brazilian preschoolers

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    Maria Laura da Costa Louzada

    2012-12-01

    Full Text Available A prevenção e o tratamento do excesso de peso são particularmente complexos, reforçando a importância de estudos que visem esclarecer sua rede de causas e efeitos. Assim, o objetivo desse estudo foi avaliar a relação entre horas de sono noturnas e medidas antropométricas. Realizou-se uma análise transversal realizada a partir de dados de 348 crianças de 3 e 4 anos da cidade de São Leopoldo/ RS. As horas de sono noturnas foram relatadas pelas mães e as medidas de índice de massa corporal, circunferência da cintura e dobras cutâneas foram medidas de acordo com protocolo padrão. As análises foram ajustadas para consumo energético e horas de televisão assistidas. As crianças com excesso de peso apresentaram, em média, 0,39 horas a menos de sono em relação àquelas com peso adequado (9,77 ± 1,44 versus 10,17 ± 1,34; IC95% 0,03-0,76. Observou-se associação inversa entre horas de sono noturnas e valores de escore z de índice de massa corporal para idade (B = -0,12 IC95% -0,22--0,02. A circunferência da cintura e as dobras cutâneas apresentaram relação inversa com as horas de sono, porém sem diferença estatística. Em pré-escolares do sul do Brasil, menos horas de sono noturnas foram associadas com maiores valores de índice de massa corporal.Prevention and treatment of overweight are particularly complex, reinforcing the importance of studies aimed at clarifying their range of causes and effects. Thus, the objective of this study was to evaluate the relationship between night sleep duration and anthropometric measurements. A cross-sectional analysis was performed from data from 348 children aged 3 and 4 years in São Leopoldo/RS. Night sleep duration was reported by their mothers and body mass index, waist circumference and skinfold thickness were measured according to standard protocol. The analyses were adjusted for energy intake and hours of television watching. Overweight children had, on average, 0.39 hours less

  7. Quality of sleep in postoperative surgical oncologic patients La calidad del sueño en pacientes sometidos a cirugía oncológica Qualidade do sono em pacientes submetidos à cirurgia oncológica

    Directory of Open Access Journals (Sweden)

    Elizabeth Barichello

    2009-08-01

    Full Text Available This study aimed to evaluate surgical-oncologic patients' quality of sleep through the Pittsburgh Sleep Quality Index (PSQI questionnaire. It is an exploratory study with transversal-observational design, in 46 postoperative head & neck and urology cancer patients. The PSQI questionnaire was used to evaluate the subjective quality of sleep and the occurrence of sleep disorders. Six PSQI components were statistically significant and 78.3% of the interviewees had impaired subjective quality of sleep. Among factors leading to sleep disorders we point out: taking too long to fall asleep; waking up in the middle of the night; getting up to go to the bathroom and napping during the day. This study is expected to sensitize the nursing team regarding the need to investigate quality of sleep and causes of its disorders in cancer survivors for an effective course of action.El objetivo del estudio fue evaluar la calidad del sueño en pacientes quirúrgicos oncológicos, utilizando el cuestionario Índice de Calidad del Sueño de Pittsburgh (PSQI, para mensurar la calidad subjetiva del sueño y la ocurrencia de disturbios. Consistió en una investigación con delineamiento observacional transversal, envolviendo 46 pacientes con diagnóstico de cáncer, sometidos a procedimientos quirúrgicos de las especialidades Cabeza Cuello y Urología. Seis componentes del PSQI fueron estadísticamente significativos y 73,9% de los entrevistados presentaron comprometimiento de la calidad del sueño. Entre las causas de los disturbios del sueño se destaca: demorar para dormir, despertar en el medio de la noche, levantarse para ir al baño y dormitar durante el día. Se espera que este estudio sensibilice al equipo de enfermería sobre la necesidad de investigar la calidad y las causas de los disturbios del sueño en sobrevivientes de cáncer, para que haya una intervención efectiva.O objetivo do estudo foi avaliar a qualidade do sono em pacientes cirúrgicos oncol

  8. Percepção de sono: duração, qualidade e alerta em profissionais da área de enfermagem How nursing staff perceive the duration and quality of sleep and levels of alertness

    Directory of Open Access Journals (Sweden)

    Frida Marina Fischer

    2002-10-01

    Full Text Available Foi realizado um estudo entre auxiliares de enfermagem e enfermeiros que trabalhavam em hospital público de São Paulo. A organização dos turnos diurnos e noturnos fixos era de 12 horas diárias, seguidas de 36 horas de descanso. O objetivo deste estudo foi avaliar a percepção da duração e qualidade dos episódios de sono nos dias de trabalho e de descanso, bem como dos níveis de alerta durante os turnos diurnos e noturnos de 12 horas de trabalho. Comparadas as durações dos episódios de sono, foram detectadas diferenças significativas entre sono diurno e noturno (Teste t de Student = 10,82; p This study was conducted among health care personnel (registered nurses and nurse aides in a public hospital in São Paulo, Brazil. Work was organized in 12-hour daytime or nighttime shifts, followed by 36 hours off. The study aimed to evaluate how the nursing staff perceived the duration and quality of sleep both during and off work days, as well as their perception of alertness during working hours. There were significant differences between night and day in the duration of sleep (Student t test = 10.82; p < 0.000. Quality of daytime sleep after working night shifts was perceived as worse than nighttime sleep (Wilcoxon test, Z = 2.67; p < 0.007. Significant differences were detected in self-evaluation of alertness after the 2nd, 6th, and 10th hour of night shifts (Friedman = 63.0; p < 0.00. Alertness was perceived as worse during dawn hours. This is an indication of sleepiness at work and can have serious consequences for both health care workers and patients.

  9. Sono-synthesis and characterization of bimetallic Ni-Co/Al2O3-MgO nanocatalyst: Effects of metal content on catalytic properties and activity for hydrogen production via CO2 reforming of CH4.

    Science.gov (United States)

    Abdollahifar, Mozaffar; Haghighi, Mohammad; Babaluo, Ali Akbar; Talkhoncheh, Saeed Khajeh

    2016-07-01

    Sono-dispersion of Ni, Co and Ni-Co over Al2O3-MgO with Al/Mg ratio of 1.5 was prepared and tested for dry reforming of methane. The samples were characterized by XRD, FESEM, PSD, EDX, TEM, BET and FTIR analyses. In order to assess the effect of ultrasound irradiation, Ni-Co/Al2O3-MgO with Co content of 8% prepared via sonochemistry and impregnation methods. The sono-synthesized sample showed better textural properties and higher activity than that of impregnated one. Comparison of XRD patterns indicated that the NiO peaks became broader by increasing Co content over the support. The FESEM images displayed the particles are small and well-dispersed as a result of sonochemistry method. Also, EDX analysis demonstrated better dispersion of Ni and Co as a result of sonochemistry method in confirmation of XRD analysis. The sono-synthesized Ni-Co/Al2O3-MgO as a superior nanocatalyst with Co content of 3% illustrates much higher conversions (97.5% and 99% for CH4 and CO2 at 850 °C), yields (94% and 96% for H2 and CO at 850 °C) and 0.97 of H2/CO molar ratio in all samples using an equimolar feed ratio at 850 °C. During the 1200 min stability test, H2/CO molar ratio remained constant for the superior nanocatalyst. Copyright © 2016 Elsevier B.V. All rights reserved.

  10. Sono, qualidade de vida e depressão em mulheres no pós-tratamento de câncer de mama Sleep, quality of life and depression in women in breast cancer post-treatment

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    Renatha El Rafihi-Ferreira

    2012-01-01

    Full Text Available Este trabalho investigou a qualidade de sono de mulheres com câncer de mama e suas relações com qualidade de vida e depressão. Cinqüenta mulheres com câncer de mama (grupo clínico e cinqüenta controles responderam um questionário médico-demográfico e ao instrumento Pittsburgh Sleep Quality Index. O grupo clínico também respondeu aos instrumentos Quality of Life Cancer-Survivor e Brief Zung Self-Rating Depression Scale. Verificou-se que mulheres com câncer tinham significativamente mais queixas de nictúria, calor e despertares noturnos. O grupo clínico com má qualidade do sono apresentou comprometimento na qualidade de vida e mais sintomas de depressão. Em geral, a qualidade de sono em mulheres com câncer de mama pode predizer a qualidade de vida e o bem estar psicológico.This study investigated the sleep quality of women with breast cancer and their relationship with quality of life and depression. Fifty women with breast cancer (clinical group and a control group of other 50 women without the disease answered a clinical-demographic questionnaire and the Pittsburgh Sleep Quality Index. The clinical group also completed the Quality of Life Cancer-Survivor and the Brief Zung Self-Rating Depression Scale questionnaires. It was found that women with breast cancer had significantly more complaints of nocturia, heat and nighttime awakenings. The clinical group with poor quality of sleep reported impaired quality of life and more symptoms of depression. In general terms, sleep quality in women with breast cancer can predict their quality of life and psychological well-being.

  11. Dieta hipocalórica e treinamento físico em pacientes com síndrome metabólica e apnéia do sono

    OpenAIRE

    Cristiane Maki Nunes

    2011-01-01

    INTRODUÇÃO. Estudos anteriores demonstraram que pacientes com síndrome metabólica (SMet) e apnéia obstrutiva do sono (SAOS) apresentam hiperativação simpática e hipersensibilidade quimiorreflexa. Neste trabalho, testamos as hipóteses de que: 1) dieta hipocalórica associada à treinamento físico (D+TF) melhora a sensibilidade quimiorreflexa em pacientes com SMet e 2) Os efeitos da D+TF seriam mais pronunciados em pacientes com SMet+AOS que em pacientes sem AOS (SMet-AOS). MÉTODOS. Vinte e sete ...

  12. Qualidade do sono e depressão: que relações sintomáticas em crianças de idade escolar Sleep quality and depression: what symptomatic link in school-aged children

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    Filipa Serrão

    2007-12-01

    Full Text Available O sono e a depressão têm sido associados, tendo-se questionado se um padrão de sono deficitário era condição necessária e suficiente para o aparecimento de sintomatologia depressiva. Este estudo procura averiguar a prevalência dos problemas de sono e da depressão em crianças em idade escolar. Foram avaliadas em dois momentos 467 crianças da escola primária, com idades compreendidas entre os 6 e os 11 anos de idade (M=8,70; DP=0,692. Os resultados revelam uma diminuição na prevalência ao longo do ano lectivo nos dois quadros nosológicos, verificando-se também uma relação negativa entre o rendimento académico e a sintomatologia depressiva nos dois momentos de avaliação (T1 rho=-0,349; p=0,000; T2 rho=-0,406; p=0,000. Serão discutidas implicação dos resultados para a avaliação e intervenção das crianças, contemplando a possibilidade de uma intervenção precoce de modo a prevenir o aparecimento de um estado depressivo na infância que venha manter ou agravar os problemas do sono.Sleep and depression have been linked and questioned if a deficit sleep pattern were a sufficient condition for arising of depressive symptoms. This study tries to examine the prevalence of sleep problems and depression in school-aged children. Four-hundred and sixty-seven elementary school-children, aged 6 and 11 years (M= 8,70; DP=0,692 were evaluated in two moments. The results revealed that during the school-year both nosological entities reduced prevalence rates, and also a negative association between academic performance and depressive symptoms were found in both evaluation moments (T1 rho=-0,349; p=0,000; T2 rho=-0,406; p=0,000. The implications of such data for evaluation and intervention in children will be discussed, taking into account the possibility of a early interventions to prevent onset of depressive states in infancy which maintain and heighten sleep problems.

  13. Sleep disorders and starting time to school impair balance in 5-year-old children Distúrbios do sono, período escolar e equilíbrio em crianças com 5 anos de idade

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    Cristiane Aparecida Moran

    2005-09-01

    Full Text Available OBJECTIVE: To verify if sleep disorders and differents starting time to school have impaired motor skills in 5-year-old children. METHOD: Cross-sectional design consisting of 132 children with sleep disorders and 136 normal controls of the public school in the city of São Paulo. The group with sleep disorders was identified based on a questionnaire, and motor tests for global motor coordination, fine motor coordination, perceptual-motor coordination, and static and dynamic balance were applied in all children. RESULTS: In the static balance test, more specifically in the sharpened Romberg (Tandem test, 34% of boys from the study group, who studied in the morning, failed the test (p OBJETIVO: Verificar se distúrbios do sono e diferentes períodos escolares comprometem as habilidades motoras de crianças de 5 anos. MÉTODO: Realizou-se estudo transversal com 132 crianças com distúrbio do sono e 136 controles normais de escolas públicas da cidade de São Paulo. Foram utilizados questionários para distúrbios do sono e testes para coordenação motora global, motora fina, percepto-motora, equilíbrio estático e dinâmico. RESULTADOS: No teste de equilíbrio estático, mais especificamente na prova pé ante pé, 34% dos meninos do grupo estudo, que estudavam no período da manhã, falharam no teste (p < 0,05. Na prova de apoio monopodal, 62% dos meninos do grupo estudo, que estudavam no período da manhã, falharam no teste (p < 0,05. CONCLUSÃO: Este estudo sugere que os distúrbios do sono podem interagir com o período escolar e alterar a performance motora, principalmente de meninos que estudam no período da manhã.

  14. Estudo cárdio-respiratório do sono domiciliário em crianças. Será exequível?

    Directory of Open Access Journals (Sweden)

    Adelina Amorim

    2004-11-01

    Full Text Available RESUMO: A síndroma de apneia obstrutiva do sono é comum em crianças, podendo associar-se a graves complicações. A polissonografia nocturna mantém-se como gold standard no diagnóstico desta patologia. Dada a escassez de laboratórios do sono, nomeadamente com “perfil pediátrico”, têm-se vindo a usar outras técnicas de screening.O objectivo deste trabalho foi estudar a rentabilidade dos estudos cárdio-respiratórios do sono domiciliários realizados em crianças.Desde Janeiro de 1999 a Junho de 2003 foram realizados 33 estudos cardio-respiratórios do sono domiciliários em crianças.Foram estudadas 31, com uma média de idades de 10,6+/-3,4 anos, sendo 21 do sexo masculino. Em 5 doentes existiam malformações cránio-faciais, em 2 doenças neuromusculares e 10 crianças eram obesas. Os sinais de fluxo nasal e de saturação do oxigénio foram bons/razoáveis em 67,7% e 96,8% doentes, respectivamente. Apenas em 2 casos o registo foi nulo.O valor médio do índice de apneia-hipopneia foi de 10,7+/-12,3/hora, a saturação média de oxigénio de 95,6%+/-3,0 %, a saturação mínima de 82,2 %+/ /-9,2% e o índice de dessaturação de 12,5+/-10,7/ /hora. A síndroma de apneia obstrutiva do sono foi confirmada/sugestiva em 30 (91% doentes. O índice de apneia-hipopneia e o índice de dessaturação foi mais elevado no grupo de crianças commalformações cránio-faciais e doenças neuromusculares comparativamente com as crianças obesas (26,3 vs 10,5 e 21,5 vs 11,3, respectivamente mas sem significado estatístico.Na nossa experiência, o estudo cárdio-respiratório do sono domiciliário tem-se revelado um método de diagnóstico facilmente aplicável nas crianças. Ao fornecer mais informações objectivas do que outras técnicas de screening, poderá certamente avaliar com mais segurança a exist

  15. Investigação da ativação seletiva de neurônios dopaminérgicos da substância negra pars compacta promovida pela privação de sono REM em ratos

    OpenAIRE

    Proença, Mariana Bordinhão

    2013-01-01

    Resumo: Atualmente, vários estudos abordam a ligação entre o sono e a neurotransmissão dopaminérgica, focando nos mecanismos pelos quais a doença de Parkinson (DP) e o sono podem ser entrelaçados. Por conseguinte, as variações nas atividades durante os ciclos de sono, ou ao nível de corpos celulares dopaminérgicos na área tegmental ventral (VTA) e / ou na substância negra pars compacta (SNPC) podem afetar funções como a memória. Deste modo, foram realizadas quantificações neuroquímicas de DA,...

  16. Relação entre hipertensão arterial sistêmica e síndrome da apnéia obstrutiva do sono

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    Cavallari Fransérgio E.M.

    2002-01-01

    Full Text Available Introdução: hipertensão arterial sistêmica (HAS e a Síndrome da Apnéia Obstrutiva do Sono (SAOS são doenças prevalentes na população mundial e, embora despertem interesse na comunidade médica, não têm fisiopatologia e mecanismos pelo qual produzem suas complicações completamente elucidados. A SAOS está cada vez mais relacionada a patologias cardiovasculares, principalmente à hipertensão, que é prevalente em pacientes com SAOS. Objetivo: Em nosso estudo, objetivamos avaliar as alterações encontradas na presença de HAS em pacientes portadores de SAOS. Forma de estudo: Clínico prospectivo randomizado. Material e método: Estudamos uma população de pacientes do Ambulatório de Ronco e Apnéia do HC FMRP - USP, de fevereiro de 1999 a fevereiro de 2002, em um total de 42, sendo 30 (71,42% pacientes homens e 12 (28,58% mulheres, com idades de 21 a 77 anos (média de 45,3, dp = 9,372706, todos com diagnóstico de SAOS confirmado pela polissonografia, divididos em dois grupos de 21 pacientes com SAOS (controle e 21 com SAOS e HAS. Avaliamos as escalas de Epworth, Ronco e Sonolência nos dois grupos, além do uso da polissonografia para estudo objetivo. Resultado: Não encontramos diferença estatística entre os grupos na comparação dos resultados das escalas, mesmo tendo o grupo de hipertensos médias maiores. Ao avaliarmos objetivamente os pacientes com a polissonografia, levando em conta o IDR, há estatística significante (p=0,0326, com os hipertensos apresentando médias maiores. Vendo a proporção nos grupos, há predomínio de pacientes com apnéia moderada e grave entre os hipertensos, e leve entre os do controle. Conclusão: Concluindo, a concomitância entre HAS e SAOS representa fator agravante no grau da apnéia.

  17. O plantão noturno em anestesia reduz a latência ao sono El plantón nocturno en anestesia reduce la latencia al sueño Short sleep latency in residents after a period on duty in anesthesia

    OpenAIRE

    Lígia Andrade da Silva Telles Mathias; Christina Morotomi Funatsu Coelho; Elizabeth Pricoli Vilela; Joaquim Edson Vieira; Marcelo Lacava Pagnocca

    2004-01-01

    JUSTIFICATIVA E OBJETIVOS: Os médicos em geral, os anestesiologistas em particular, têm jornadas de trabalho prolongadas. Os residentes de Anestesiologia podem apresentar fadiga e estresse significativos. O objetivo deste trabalho foi verificar, em residentes de primeiro e segundo anos a latência do sono em períodos após plantão. MÉTODO: Foram avaliados 11 residentes em situações distintas: às 7 horas da manhã, após noite de sono normal (> 7h), sem plantão nos 3 dias anteriores (M1); às 7 hor...

  18. Sintomas da síndrome de apnéia-hipopnéia obstrutiva do sono em crianças Symptoms of obstructive sleep apnea-hypopnea syndrome in children

    Directory of Open Access Journals (Sweden)

    Paloma Baiardi Gregório

    2008-06-01

    Full Text Available OBJETIVOS: Investigar os sintomas mais freqüentes encontrados em crianças com diagnóstico polissonográfico de síndrome da apnéia-hipopnéia obstrutiva do sono (SAHOS. MÉTODOS: Foram avaliadas 38 crianças consecutivamente encaminhadas ao laboratório do sono com suspeita de SAHOS no período de junho de 2003 a dezembro de 2004. Os pacientes foram submetidos a um questionário pré-sono e a polissonografia. RESULTADOS: A idade média foi de 7,8 ± 4 anos (variação, 2-15 anos, sendo 50% das crianças do sexo masculino. Não apnéicos corresponderam a 7,9% dos pesquisados, distúrbio leve obstrutivo do sono ocorreu em 42,1%, moderado em 28,9% e severo em 22,1%. Observou-se maior freqüência de casos severos de apnéia entre crianças menores de seis anos (idade pré-escolar. Dentre as crianças com SAHOS, os sintomas mais citados foram ronco e obstrução nasal, presentes em 74,3 e 72,7% das crianças, respectivamente. Sonolência excessiva e bruxismo ocorreram em, respectivamente, 29,4 e 34,3% dos casos e doença do refluxo em apenas 3,1%. Agitação das pernas e dificuldade para iniciar o sono foram encontradas em, respectivamente, 65 e 33% dos avaliados. Todas as crianças que apresentaram SAHOS de grau severo tinham queixa de ronco e bruxismo. CONCLUSÕES: Nossos resultados mostraram que os sintomas mais freqüentes em crianças e adolescentes com SAHOS são ronco e obstrução nasal. Além disso, quadros mais graves da SAHOS estão associados à menor faixa etária.OBJECTIVE: To investigate the symptoms most frequently found in children with a polysomnographic diagnosis of obstructive sleep apnea-hypopnea syndrome (OSAHS. METHODS: We evaluated 38 children consecutively referred to the sleep laboratory with suspicion of OSAHS between June of 2003 and December of 2004. The patients were submitted to a pre-sleep questionnaire and to polysomnography. RESULTS: The mean age was 7.8 ± 4 years (range, 2-15 years, and 50% of the children

  19. Efeito da acupuntura na melhora da dor, sono e qualidade de vida em pacientes fibromiálgicos: estudo preliminar Effect of acupuncture on pain, sleep and quality of life improvement in fibromyalgia patients: preliminary study

    Directory of Open Access Journals (Sweden)

    Raymond S. Takiguchi

    2008-09-01

    Full Text Available A fibromialgia é uma síndrome definida por dor crônica generalizada e em pelo menos 11 dos 18 tender points, pontos dolorosos específicos. Este ensaio clínico randômico visou verificar a eficácia da acupuntura na melhora da dor, sono e qualidade de vida de pacientes fibromiálgicas. Dentre 20 mulheres com média de idade 44 anos, com diagnóstico de fibromialgia segundo critérios do Colégio Americano de Reumatologia, finalizaram o estudo 12, distribuídas aleatoriamente em dois grupos: A (GA, n=5, que recebeu acupuntura segundo a medicina tradicional chinesa; e B (GB, n=7, que teve a inserção de agulhas nos tender points base do occipital, trapézio, supraespinhoso e epicôndilo lateral. A dor foi avaliada por escala visual analógica e dolorimetria; o sono, pelo Inventário do Sono; e a qualidade de vida, pelo Questionário de Impacto da Fibromialgia (QIF. Os grupos receberam acupuntura uma vez por semana, durante oito semanas, com inserção de oito agulhas por 25 minutos. Os dados foram tratados estatisticamente, adotando-se o nível de significância ±=0,05. No GA, houve melhora estatisticamente significante do sono; e no GB, na dor, limiar de dor nos tender points, no sono e nos itens do QIF dor, cansaço matinal, ansiedade e depressão (pFibromyalgia is a syndrome defined by chronic widespread pain and sensitivity to pressure at at least 11 of 18 tender points. The aim of this random blind clinical trial was to assess the effectiveness of acupuncture on pain relief, on quality of sleep and life in fibromyalgia patients. From 20 female fibromyalgic patients (diagnosed according to the American College of Rheumatology, mean aged 44 years, 12 completed the study, randomly assigned into two groups: group A (GA, n=5 received acupuncture according to the traditional Chinese medicine; and group B (GB, n=7 received acupuncture at eight tender points: at the occiput, trapezius muscle, supraspinatus muscle, and lateral epicondyle. Pain

  20. Avaliação de um modelo de predição para apneia do sono em pacientes submetidos a polissonografia Evaluation of a prediction model for sleep apnea in patients submitted to polysomnography

    Directory of Open Access Journals (Sweden)

    Silvio Musman

    2011-02-01

    Full Text Available OBJETIVO: Testar um modelo de predição para apneia do sono a partir de variáveis sociodemográficas e clínicas em uma população com suspeita de distúrbio do sono e submetida à polissonografia. MÉTODOS: Foram incluídos no estudo 323 pacientes consecutivos submetidos à polissonografia por suspeita clínica de distúrbio do sono. Utilizou-se um questionário com questões sociodemográficas e a escala de sonolência de Epworth. Foram medidos pressão arterial, peso, altura e SpO2. A regressão linear múltipla, tendo o índice de apneia-hipopneia (IAH como variável dependente, foi utilizada para construir um modelo de predição de apneia do sono. A regressão logística multinomial foi realizada para verificar fatores associados de forma independente à gravidade da apneia (leve, moderada ou grave em comparação à ausência de apneia. RESULTADOS: A prevalência de apneia do sono na população de estudo foi de 71,2%, e foi mais prevalente nos homens que nas mulheres (81,2% vs. 56,8%; p OBJECTIVE: To test a prediction model for sleep apnea based on clinical and sociodemographic variables in a population suspected of having sleep disorders and submitted to polysomnography. METHODS: We included 323 consecutive patients submitted to polysomnography because of the clinical suspicion of having sleep disorders. We used a questionnaire with sociodemographic questions and the Epworth sleepiness scale. Blood pressure, weight, height, and SpO2 were measured. Multiple linear regression was used in order to create a prediction model for sleep apnea, the apnea-hypopnea index (AHI being the dependent variable. Multinomial logistic regression was used in order to identify factors independently associated with the severity of apnea (mild, moderate, or severe in comparison with the absence of apnea. RESULTS: The prevalence of sleep apnea in the study population was 71.2%. Sleep apnea was more prevalent in men than in women (81.2% vs. 56.8%; p < 0

  1. Computerized analysis of snoring in sleep apnea syndrome Análise computadorizada do ronco na síndrome da apneia do sono

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    Fabio Koiti Shiomi

    2011-08-01

    Full Text Available The International Classification of Sleep Disorders lists 90 disorders. Manifestations, such as snoring, are important signs in the diagnosis of the Obstructive Sleep Apnea Syndrome; they are also socially undesirable. OBJECTIVE: The aim of this paper was to present and evaluate a computerized tool that automatically identifies snoring and highlights the importance of establishing the duration of each snoring event in OSA patients. MATERIAL AND METHODS: The low-sampling (200 Hz electrical signal that indicates snoring was measured during polysomnography. The snoring sound of 31 patients was automatically classified by the software. The Kappa approach was applied to measure agreement between the automatic detection software and a trained observer. Student's T test was applied to evaluate differences in the duration of snoring episodes among simple snorers and OSA snorers. RESULTS: Of a total 43,976 snoring episodes, the software sensitivity was 99. 26%, the specificity was 97. 35%, and Kappa was 0. 96. We found a statistically significant difference (p A classificação internacional de distúrbios do sono enumera aproximadamente 90 distúrbios. Manifestações, como o ronco, são um sinal no diagnóstico da Síndrome da Apneia Obstrutiva, além de ser um incômodo social. OBJETIVO: O objetivo deste artigo é apresentar e avaliar a ferramenta computacional que identifica o ronco automaticamente e destacar a importância da quantificação da duração de cada evento do ronco em pacientes com SAHOS. MATERIAL E MÉTODOS: O sinal elétrico que representa o ronco de baixa amostragem (200 hz foi captado enquanto os pacientes eram submetidos à polissonografia. O sinal do ronco dos 31 pacientes foi classificado pelo programa computacional automaticamente. Utilizamos o valor de Kappa para avaliar a concordância entre o programa de detecção automática e o observador treinado (teste t-student. Avaliamos a diferença da duração dos episódios de

  2. Síndrome da apneia obstrutiva do sono e o potencial auditivo P300 Obstructive sleep apnea and P300 evoked auditory potential

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    Carlos Henrique Martins

    2011-12-01

    Full Text Available A Síndrome da Apneia Obstrutiva do Sono (SAOS diminui as capacidades da atenção, memória e concentração, fatores relacionados com a cognição. A análise dos parâmetros do P300 auditivo permitiria inferir disfunção cognitiva. OBJETIVO: Comparar os dados da polissonografia e do P300 auditivo em adultos, roncopatas primários com portadores de SAOS. CASUÍSTICA E MÉTODO: Estudo prospectivo em roncopatas primários (N=12 e em portadores de SAOS (N=54, submetidos à polissonografia definidos pelo índice de apneia e hipopneia (IAH. As variáveis da polissonografia e as do P300 foram comparadas, pelos testes "T" de Student, exato de Fisher, regressão logística e análise de correlação com nível de significância de 5%. RESULTADOS: O IAH apresentou correlação inversa com a oximetria em ambos os grupos. A prevalência do P300 foi menor no G.SAOS (teste exato de Fisher, p=0,027. A idade dos pacientes não influenciou a prevalência do P300 (análise de regressão; p=0,232. A amplitude do P300 foi menor do G.SAOS (teste "T" de Student; p=0,003 a latência do P300 foi semelhante em ambos os grupos (teste "T" de Student; p=0,89. CONCLUSÃO: A redução da amplitude do P300 nos portadores de SAOS sugere disfunção cognitiva induzida por diminuição da memória auditiva.The obstructive sleep apnea syndrome (OSAS reduces attention span, memory and concentration capacities, all associated with cognition. The analysis of the auditory P300 parameters could help infer cognitive dysfunction. OBJECTIVE: To compare the data from polysomnography and the auditory P300 in adults, primary snorers with OSAS patients. MATERIALS AND METHODS: Prospective study with primary snorers (N=12 and in OSAS patients (N=54, submitted to polysomnography, defined by the apnea-hypopnea index (AHI. The polysomnography and P300 variables were compared by the t-Student test, the Exact Fisher's Test, logistic regression and analysis of correlation with a significance

  3. Moduladores dos hábitos de sono na infância Moduladores de los hábitos del sueño en la infancia Modulators of sleeping habits in childhood

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    Lorena Teresinha Consalter Geib

    2007-10-01

    Full Text Available Trata-se de um artigo de revisão bibliográfica realizado com o objetivo de apresentar os principais fatores orgânicos, psicológicos e culturais que influenciam os hábitos de sono do lactente. Com uma abordagem clínico-antropológica, descreve as inter-relações desses hábitos com os estressores biocomportamentais e psicossociais, além das práticas culturais como co-leito, alimentação noturna, objetos transicionais e uso de chupetas. Aponta para algumas condutas que podem modular a fisiologia do sono e as práticas domiciliares de sono na infância.Tratase de un artículo de revisión relizado con el objetivo de presentar los principales factores orgánicos, psicológicos y culturales que influencian en los hábitos del sueño del lactante. Con un abordaje clínico-antropológico, describe las interrelaciones de esos hábitos con los éstressores biocomportamentales y psicosociales, más allá de las prácticas culturales como el co-lecho, alimentación nocturna, objetos transicionales y el uso de chupetes. Apunta para algunas conductas que pueden modular la fisiología del sueño y las prácticas domiciliares del sueño en la infancia.This literature review presents the main organic, psychological and cultural factors influencing the sleeping habits of infants. By means of a clinical-anthropological approach, the interrelation between these habits and biobehavioral and psychosocial stressing factors is described, as well as cultural practices such as shared bed, night feeding, transitional objects and use of dummies. It presents some measures that may modulate the physiology of sleep and home practices of sleeping in childhood.

  4. Atualização em síndrome da apnéia obstrutiva do sono na infância Update in obstructive sleep apnea syndrome in children

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    Aracy P. S. Balbani

    2005-02-01

    Full Text Available A prevalência de SAOS em crianças é de 0,7-3%, com pico de incidência nos pré-escolares. Fatores anatômicos (obstrução nasal severa, más-formações craniofaciais, hipertrofia do tecido linfático da faringe, anomalias laríngeas, etc. e funcionais (doenças neuromusculares predispõem à SAOS na infância. A principal causa da SAOS em crianças é a hipertrofia adenotonsilar. As manifestações clínicas mais comuns são: ronco noturno, pausas respiratórias, sono agitado e respiração bucal. A oximetria de pulso noturna, a gravação em áudio ou vídeo dos ruídos respiratórios noturnos e a polissonografia breve diurna são métodos úteis para triagem dos casos suspeitos de SAOS em crianças, e o padrão-ouro para diagnóstico é a polissonografia em laboratório de sono durante uma noite inteira. Ao contrário dos adultos com SAOS, as crianças costumam apresentar: menos despertares associados aos eventos de apnéia, maior número de apnéias/hipopnéias durante o sono REM e dessaturação mais acentuada da oxihemoglobina mesmo nas apnéias de curta duração. O tratamento da SAOS pode ser cirúrgico (adenotonsilectomia, correção de anomalias craniofaciais, traqueostomia ou clínico (higiene do sono, pressão positiva contínua nas vias aéreas - CPAP.The prevalence of OSAS in children is 0.7-3%, with peak incidence in pre-schoolers. It is characterised by partial or complete upper airway obstruction during sleep, causing intermittent hypoxia. Both anatomical (severe nasal obstruction, craniofacial anomalies, hypertrophy of the pharyngeal lymphoid tissue, laryngeal anomalies, etc. and functional factors (neuromuscular diseases predispose to OSAS during childhood. The main cause of OSAS in children in adenotonsillar hypertrophy. The most common clinical manifestations of OSAS are: nocturnal snoring, respiratory pauses, restless sleep and mouth breathing. Nocturnal pulse oximetry, nocturnal noise audio/videotape recording and nap

  5. Affective state dependence and relative trait stability of perfectionism in sleep disturbances Dependência do estado afetivo e estabilidade relativa do traço do perfeccionismo nas perturbações de sono

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    Berta R. Maia

    2011-09-01

    Full Text Available OBJECTIVE: To evaluate the degree of absolute change, relative stability and state dependence of trait perfectionism in sleep disturbances in a sample of university students. METHOD: Participants completed the Multidimensional Perfectionism Scale and two items concerning sleep difficulties. The mean age at T0 (baseline was 19.59 years (SD = 1.61, range = 17-25 and 62.5% of the sample were female. RESULTS: Absolute changes in self-oriented and socially-prescribed perfectionism were found. Relative stability was found for all perfectionism dimensions. Prior and concurrent sleep disturbances explained a significant amount of variance in perfectionism. Controlling for the effects of sleep measures, prior self-oriented perfectionism and other-oriented perfectionism were the only significant predictors of subsequent self-oriented perfectionism and other-oriented perfectionism, at T1 and T2. Difficulties falling asleep at T1 and socially-prescribed perfectionism at T0 were significant predictors of socially-prescribed perfectionism at T1. CONCLUSION: Despite significant changes in perfectionism mean scores over the follow-up, the correlation analyses demonstrated that participants remained quite stable in regard to their relative levels of perfectionism. As concurrent difficulties initiating sleep also predicted concurrent socially-prescribed perfectionism, this seems to be one dimension of perfectionism with trait-state characteristics.OBJETIVOS: Avaliar o grau de mudança absoluta, de estabilidade relativa e dependência do estado do perfeccionismo nas perturbações de sono numa amostra de estudantes universitários. MÉTODO: Os sujeitos completaram a Escala Multidimensional do Perfeccionismo e dois itens sobre dificuldades em dormir. Os dados foram recolhidos em três momentos de avaliação, separados por um intervalo de um ano acadêmico. A idade média dos sujeitos no T0 era de 19,59 anos (DP = 1,61, variação = 17-25; 62,5% eram mulheres

  6. Affective state dependence and relative trait stability of perfectionism in sleep disturbances Dependência do estado afetivo e estabilidade relativa do traço do perfeccionismo nas perturbações de sono

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    Berta R. Maia

    2011-01-01

    Full Text Available OBJECTIVE: To evaluate the degree of absolute change, relative stability and state dependence of trait perfectionism in sleep disturbances in a sample of university students. METHOD: Participants completed the Multidimensional Perfectionism Scale and two items concerning sleep difficulties. The mean age at T0 (baseline was 19.59 years (SD = 1.61, range = 17-25 and 62.5% of the sample were female. RESULTS: Absolute changes in self-oriented and socially-prescribed perfectionism were found. Relative stability was found for all perfectionism dimensions. Prior and concurrent sleep disturbances explained a significant amount of variance in perfectionism. Controlling for the effects of sleep measures, prior selforiented perfectionism and other-oriented perfectionism were the only significant predictors of subsequent self-oriented perfectionism and otheroriented perfectionism, at T1 and T2. Difficulties falling asleep at T1 and socially-prescribed perfectionism at T0 were significant predictors of socially-prescribed perfectionism at T1. CONCLUSION: Despite significant changes in perfectionism mean scores over the follow-up, the correlation analyses demonstrated that participants remained quite stable in regard to their relative levels of perfectionism. As concurrent difficulties initiating sleep also predicted concurrent socially-prescribed perfectionism, this seems to be one dimension of perfectionism with trait-state characteristics.OBJETIVOS: Avaliar o grau de mudança absoluta, de estabilidade relativa e dependência do estado do perfeccionismo nas perturbações de sono numa amostra de estudantes universitários. MÉTODO: Os sujeitos completaram a Escala Multidimensional do Perfeccionismo e dois itens sobre dificuldades em dormir. Os dados foram recolhidos em três momentos de avaliação, separados por um intervalo de um ano acadêmico. A idade média dos sujeitos noT0 era de 19,59 anos (DP = 1,61, variação = 17-25; 62,5% eram mulheres

  7. Fatores que interferem na qualidade do sono de pacientes internados Factores que interfieren en la calidad del sueño de pacientes internados Factors that affect inpatients' quality of sleep

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    Shíntia Viana da Costa

    2013-02-01

    Full Text Available Este estudo objetivou identificar fatores que interferem na qualidade do sono de pacientes internados em hospital universitário do interior de São Paulo. Trata-se de estudo exploratório, de corte transversal, com amostragem não probabilística. Participaram 117 pacientes (59% homens, idade média de 48 anos, desvio padrão 16,9 internados há pelo menos 72 horas, em condições clínicas estáveis. Os instrumentos utilizados foram: questionário de identificação e Fatores Intervenientes na Qualidade do Sono (FIQS. O tratamento dos dados foi feito com estatística descritiva e cada item do FIQS foi submetido a teste e reteste. Os fatores apontados com maior frequência foram: acordar cedo (55,6%, sono interrompido (52,1%, iluminação excessiva (34,2%, recebimento de cuidados pela equipe de enfermagem (33,3% e distúrbios orgânicos como dor e fadiga (26,5%. Sugere-se que os enfermeiros planejem intervenções buscando modificar fatores que propiciam ruídos e iluminação intensos à noite, visando reduzir interrupções e, consequentemente, a privação de sono.Se objetivó identificar factores que interfieren en la calidad del sueño de pacientes internados en un hospital universitario del interior de São Paulo. Estudio exploratorio, transversal, con muestra no probabilística. Participaron 117 pacientes (59% masculinos, media etaria 48,0 años, desvío estándar 16,9 internados al menos hace 72 horas, en condiciones clínicas estables. Se utilizaron los instrumentos: cuestionario de identificación y Factores Intervinientes en la Calidad del Sueño (FIQS. Los datos se analizaron según la estadística descriptiva, cada ítem del FIQS fue sometido a prueba y contraprueba. Los factores señalados como más frecuentes fueron: despertar temprano (55,6%, sueño interrumpido (52,1%, iluminación excesiva (32,4%, recepción de cuidados de enfermería (33,3% y disturbios orgánicos, como dolor y fatiga (26,5%. Se sugiere que los enfermeros

  8. Influência da qualidade do sono na saúde, no comportamento e na aprendizagem escolar de alunos de 2º e 3º ciclos do ensino básico

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    Oliveira, Olinda

    2012-01-01

    Dissertação de mestrado em Estudos da Criança (área de especialização em Promoção da Saúde e do Meio Ambiente) O sono é uma função biológica vital que desempenha um papel fundamental na vida humana e pode ser definido como um estado de inconsciência do qual podemos ser despertados, por exemplo, por estímulos sensoriais (Guyton & Hall, 2002). Não é por acaso que passamos dois terços da nossa vida em vigília e um terço a dormir (Deitos, 2004). Porém, uma quantidade suficiente de so...

  9. Distúrbios do sono, sintomas de ansiedade e de depressão e qualidade de vida em trabalhadores rurais em período de entressafra cafeeira

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    Joseane Mendonça Monteiro de Lima

    2010-01-01

    INTRODUÇÃO: O desemprego e o trabalho precário podem alterar o sono e comprometer a qualidade de vida e a saúde mental do trabalhador. O trabalho por safra na colheita de café expõe o trabalhador às condições climáticas, ao excesso de atividade física, ao ganho por produtividade e à falta de garantia de estabilidade do trabalho. São elementos que podem acarretar doenças e aumentar a busca por atendimento médico e psicológico, sobrecarregando os serviços de saúde. OBJETIVOS: 1) avaliar o padrã...

  10. Empiema pleural por Eikenella corrodens e Porphyromonas asaccharolytica numa doente diabética sob ventilação não invasiva por síndrome de apneia obstrutiva do sono

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    J. Caiano Gil

    2013-03-01

    Full Text Available Resumo: A Eikenella corrodens é um microrganismo habitualmente encontrado na mucosa oral, trato gastrointestinal e trato geniturinário de humanos. Os casos de infeção pleuropulmonar por este agente são raros em indivíduos imunocompetentes, sendo a aspiração um fator importante na sua patogenia. Apesar de apresentar geralmente um prognóstico favorável, o reconhecimento desta infeção é essencial dado o perfil de sensibilidades característico. Os autores apresentam um caso de empiema pleural por E. corrodens, em coinfeção com Porphyromonas asaccharolytica, numa doente diabética imunocompetente com síndrome de apneia obstrutiva do sono, discutindo o papel da ventilação não invasiva como fator predisponente da referida infeção. Abstract: Eikenella corrodens is a normal inhabitant of the human oral cavity and gastrointestinal and genitourinary tracts. Pleuropulmonary infections by this microorganism are uncommon. Pulmonary aspiration is a chief predisposing condition. Although the outcome is usually favorable, its distinctive antibiotic sensitivity pattern makes bacterial identification an important feature in dealing with this infection. The authors report a case of pleural empyema caused by co-infection with Eikenella corrodens and Porphyromonas asaccharolytica, in an immunocompetent diabetic patient with obstructive sleep apnea syndrome, followed by a discussion on the role of noninvasive ventilation in the development of this infection. Palavras-chave: Empiema pleural, Ventilação não invasiva, Apneia obstrutiva do sono, Eikenella corrodens, Porphyromonas, Keywords: Pleural empyema, Continuous positive airway pressure, Obstructive sleep apnea, Eikenella corrodens, Porphyromonas

  11. Sleep, stress and compensatory behaviors in Australian nurses and midwives Sueño, estrés y comportamientos compensatorios por enfermeras y parteras australianas Sono, estresse e comportamentos compensatórios por enfermeiras e parteiras australianas

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    Jillian Dorrian

    2011-10-01

    ías, 1.002 turnos. RESULTADOS: Los participantes relataron de moderados a elevados niveles de estrés y de agotamiento en 20%-40% de los días de trabajo; experimentaron disturbios del sueño en más de 50% de los días de trabajo; relataron esfuerzo para permanecer despierto en 27% de los días de trabajo; y sofrieron somnolencia extrema o accidente cerca de casa en 9% de los días de trabajo. Edad, duración del sueño percibido y jornadas fueron predictores significativos de la ingestión de cafeína. Aproximadamente 60% de los participantes relataron utilizar la ayuda para dormir: cerca de 20% usaron de medicación prescripta y 44% de las enfermeras y 9% de las parteras consumirán alcohol como auxilio para dormir al menos una vez durante el estudio. Estrés y días de trabajo fueron predictores significativos del uso de sedativos. En general, 22% relataron ser indiferente, o ligeramente insatisfecho con su trabajo. CONCLUSIONES: Problemas en el sueño, estrés y agotamiento elevados y disminución en la satisfacción en el trabajo son prevalecientes. Uso de alcohol y de medicamentos para dormir, y consumo de cafeína para mantenerse alerta también es común. Enfermeras y parteras pueden usar la cafeína para compensar la reducción del sueño, especialmente en días de trabajo, y usar somníferos para compensar el estrés diario.OBJETIVO: Descrever sono, estresse e comportamentos compensatórios em enfermeiras e parteiras. MÉTODOS: O estudo incluiu 41 enfermeiras 21 parteiras em hospitais australianos de 2005 a 2009. A participação foi voluntária. Os participantes registraram diariamente as horas de trabalho, sono, stress e níveis de exaustão, cafeína e uso de ajuda para dormir durante um mês (1.736 dias, 1.002 turnos. RESULTADOS: Os participantes relataram de moderados a elevados níveis de stress e de exaustão em 20%-40% dos dias de trabalho; experimentaram distúrbios do sono em mais de 50% dos dias de trabalho; relataram esforço para permanecer

  12. Depressão pós-parto e alterações de sono aos 12 meses em bebês nascidos na zona urbana da cidade de Pelotas/RS Postpartum depression and sleep disorders in 12 month-old babies born in the urban area of Pelotas city

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    Eliane Rozales Lopes

    2010-01-01

    Full Text Available OBJETIVO: Verificar se existe associação entre as alterações no sono dos bebês aos 12 meses de vida e a depressão pós-parto materna. MÉTODOS: Estudo do tipo transversal aninhado a uma coorte. A amostra foi constituída por mulheres que realizaram o acompanhamento pelo Sistema Único de Saúde (SUS, nas unidades básicas de saúde do município de Pelotas, e que tiveram seus partos a partir de junho/2006. Os bebês de 12 meses oriundos dessa gestação também fazem parte da amostra. Para avaliar a presença de sintomas depressivos nas mães, foi utilizada a Edinburgh Postnatal Depression Scale (EPDS e foram investigados os seguintes comportamentos do sono dos bebês: horas de sono por dia, regularidade do horário para dormir e acordar, sono agitado e despertar noturno. Para análise, foi utilizada Regressão de Poisson. RESULTADOS: 35,7% dos bebês possuem alteração no padrão de sono. Após o ajuste ao modelo hierárquico proposto, a alteração no sono infantil manteve associação com a sintomatologia depressiva da mãe (p OBJECTIVE: Verify whether there is association between sleep disorders in babies at 12 months of age and postpartum depression in motherhood. METHODS:Cross sectional study. The sample was made up of women who had done their prenatal medical care at the National Health System (SUS, at the health basic units in Pelotas and who had their deliveries from June, 2006. The 12 month old babies from these women are also part of the sample. In order to assess depressive symptoms in the mothers, Edinburgh Postnatal Depression Scale was used and the following sleeping behaviors of the babies were investigated: hours of sleep per day, regularity of sleep and wake up time, disturbed sleep and night awakening. Poisson Regression was used for the analysis. RESULTS: 35.7% of the babies showed alterations in their sleeping patterns. After adjusting for the proposed hierarchal model, sleep alteration of the babies was still

  13. Compensatory rebound of body movements during sleep, after asphyxia in neonatal rats Resposta compensatória dos movimentos corporais do sono após a asfixia em ratos recém-nascidos

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    Olivia Adayr Xavier Suarez

    2008-06-01

    Full Text Available PURPOSE: The usefulness of body movements that occur during sleep when assessing perinatal asphyxia and predicting its long-term consequences is contradictory. This study investigated whether neonatal rats manifest these movements in compensatory rebound after asphyxia, and if these alterations play an important role in its pathogenesis. METHODS: Eight neonatal rats (aged 6-48h were implanted with small EMG and EKG electrodes and sleep movements were recorded over a 30-minute control period. Recordings were continued during asphyxia caused by the enclosure of the animal in a polyvinyl sheet for 60 minutes, followed by a 30-minute recovery period. RESULTS: Heart rate was lowered to bradycardic level during asphyxia causing behavioral agitation and increased waking time during the initial phase (30 minutes. Sleep-related movements were also significantly reduced from 12.5 ± 0.5 (median ± SE/2min to 9.0 ± 0.44 in the final half of the period (Anova, pOBJETIVO: A utilidade dos movimentos corporais (MC que ocorrem durante o sono para diagnosticar e predizer as conseqüências, em longo prazo, da asfixia perinatal é contraditório. Este estudo investigou se ratos recém-nascidos (RN manifestam MC em resposta compensatória à asfixia, e se estas alterações podem ter alguma importância na sua patogênese. MÉTODOS: Oito ratos RN (6-48h de vida foram submetidos à implantação de pequenos eletrodos para registros da eletromiografia e eletrocardiografia. Os MC e a freqüência cardíaca (FC foram registrados durante períodos de 30 min: fase controle (F1, fases de asfixia (F2; F3 e fase de recuperação pós-asfixia (F4. A asfixia foi promovida pelo envolvimento completo do animal com uma lâmina de polivinil. RESULTADOS: A FC diminuiu progressivamente durante F2 e F3 até a bradicardia. Em F2 houve grande agitação dos animais e aumento dos períodos de vigília. Em F3 houve redução significante dos MC de 12,5 ± 0,5 (Md ± SE/2min para 9,0

  14. Polymorphisms in the 5-HTR2A gene related to obstructive sleep apnea syndrome Polimorfismos no gene HTR2A relacionados à síndrome da apneia obstrutiva do sono

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    Vânia Belintani Piatto

    2011-06-01

    Full Text Available Obstructive sleep apnea syndrome (OSAS is one of the most complex disorders of sleep; it involves several genetic factors that contribute to the phenotype. Serotonin (5-HT regulates a variety of visceral and physiological functions, including sleep. Gene 5-HTR2A polymorphisms may change the transcription of several receptors in the serotoninergic system, thereby contributing to OSAS. AIM: To investigate the prevalence of T102C and -1438G/A polymorphisms in the 5-HTR2A gene of patients with and without OSAS . MATERIAL AND METHOD: A molecular study of 100 index-cases and 100 controls of both genders. DNA was extracted from blood leukocytes samples and the regions that enclose both polymorphisms were amplified with PCR-RFLP. STUDY DESIGN: A cross-sectional case study. RESULTS: There was a significant prevalence of males in index cases compared to controls (pA síndrome da apneia obstrutiva do sono (SAOS é um dos distúrbios mais complexos do sono, envolvendo múltiplos fatores genéticos contribuintes para o fenótipo. A serotonina (5-HT está envolvida na regulação de uma variedade de funções viscerais e fisiológicas, inclusive o sono. Polimorfismos no gene 5-HTR2A podem alterar a transcrição, afetando o número de receptores do sistema serotoninérgico, contribuindo para a SAOS. OBJETIVO: Investigar a prevalência dos polimorfismos T102C e -1438G/A no gene HTR2A em pacientes com e sem SAOS. MATERIAL E MÉTODO: Estudo molecular em 100 pacientes como casos-índice e em 100 como grupo controle, de ambos os gêneros. O DNA foi extraído de leucócitos de sangue periférico e realizada a amplificação das regiões que abrangem ambos os polimorfismos pelas técnicas da PCR-RFLP. DESENHO DO ESTUDO: Estudo de caso/controle em corte transversal. Resultados: Houve prevalência significativa do gênero masculino nos casos-índice em relação aos controles (p<0,0001. Para o polimorfismo T102C, não houve diferença genotípica significante entre

  15. Efeito da hidrocinesioterapia sobre qualidade de vida, capacidade funcional e qualidade do sono em pacientes com fibromialgia Effect of hydrotherapy on quality of life, functional capacity and sleep quality in patients with fibromyalgia

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    Kyara Morgana Oliveira Moura Silva

    2012-12-01

    Full Text Available INTRODUÇÃO: A síndrome da fibromialgia acomete 8% da população com mais de 40 anos de idade. Dos pacientes com fibromialgia, 75% queixam-se de má qualidade do sono. OBJETIVO: Avaliar os efeitos da hidrocinesioterapia sobre a capacidade funcional e a qualidade de sono em pacientes com fibromialgia. MÉTODOS: As pacientes foram atendidas na policlínica da UNASP. Foram avaliadas 60 pacientes portadoras de fibromialgia na faixa etária entre 30 e 65 anos. Das pacientes avaliadas, 20 foram excluídas e 10 desistiram devido à impossibilidade de apresentar-se no horário do programa de exercícios. Todas as pacientes responderam aos seguintes questionários: Questionário sobre o Impacto daFibromialgia (QIF, Índice da Qualidade do Sono de Pittsburgh e Escala de Sonolência de Epworth. As sessões foram realizadas duas vezes por semana, com duração de 60 minutos cada, por um período de dois meses. RESULTADOS: A média da idade das pacientes foi de 45 anos; 66% eram trabalhadoras ativas e 34% estavam afastadas do trabalho. Verificouse que imediatamente após participarem do programa da hidrocinesioterapia, as pacientes apresentaram melhora nos seguintes aspectos avaliados por meio do QIF: capacidade funcional, absenteísmo ao trabalho, capacidade de serviço, intensidade da dor, fadiga, cansaço matinal, rigidez (P INTRODUCTION: Fibromyalgia affects 8% of the population over the age of 40 years, and 75% of the patients with fibromyalgia have poor sleep quality. OBJECTIVE: To assess the effects of hydrotherapy on the physical function and sleep quality of patients with fibromyalgia. METHODS: Patients were under clinical care at the UNASP Outpatient Clinic. This study assessed 60 female patients with fibromyalgia aged between 30 and 65 years. Out of the 60 patients assessed, 20 were excluded and 10 left the study because they could not comply with the time schedule. All patients completed the following questionnaires: Fibromyalgia Impact

  16. Efeitos do treinamento em técnica respiratória do Yoga sobre a função pulmonar, a variabilidade da freqüência cardíaca, a qualidade de vida, a qualidade de sono e os sintomas de estresse em idosos saudáveis

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    Danilo Forghieri Santaella

    2011-01-01

    Introdução: O envelhecimento está associado com a diminuição de uma série de funções, incluindo a função pulmonar, a variabilidade da freqüência cardíaca, o barorreflexo espontâneo, a qualidade de vida e de sono, assim como com o aumento de níveis de estresse. Estudos recentes sugerem que os exercícios respiratórios do Yoga podem melhorar as funções respiratória e cardiovascular, além de aumentar a qualidade de vida e de sono e reduzir os sintomas de estresse em populações de pacientes com do...

  17. Os efeitos da idade no sono, estado de alerta e sonolência e fadiga crónica em agentes da polícia de segurança pública na região de Lisboa

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    Reis, Rui Miguel Gomes António

    2004-01-01

    Dissertação de Mestrado em Psicologia da Saúde A presente investigação pretende averiguar se a idade dos agentes da P.S.P. que trabalham por turnos têm repercussão na qualidade / quantidade do seu sono e do estado de alerta e sonolência Participaram no estudo 120 Agentes da Policia de Segurança Pública da região de Lisboa. Recorreu-se à utilização dos Questionários de Sono e Fadiga; de Dados Individuais; e a Escala de alerta e sonolência do Standard Shiftwork Index (SSI) - na versão por...

  18. Bite force and sleep quality in patients with bruxism before and after using a mandibular advancement device = Força de mordida e qualidade do sono em pacientes bruxômanos antes e após o uso de placa de avanço mandibular

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    Mainieri, Vivian Chiada

    2008-01-01

    Full Text Available Objetivo: Comparar a força de mordida e a qualidade do sono em pacientes com bruxismo antes e depois do uso de uma placa de avanço mandibular resiliente. Metodologia: Dezoito pacientes com bruxismo em atendimento na Clínica de Oclusão da Faculdade de Odontologia da PUCRS foram selecionados de acordo com os critérios de eligibilidade do estudo, examinados segundo o protocolo RDC/DTM e tratados com uma placa de avanço mandibular resiliente. Antes e após 30 dias de uso da placa de avanço mandibular os sujeitos foram submetidos a testes de força máxima de mordida com um transdutor de força compressiva de arco cruzado posicionado na região de primeiro molar; de qualidade do sono, de acordo com o questionário QAS da Universidade de Toronto; e de contagem do número de contrações do músculo masseter durante o sono usando-se o adesivo BiteStrip®. Os dados foram analisados por teste t de Student, teste de Wilcoxon e teste de McNemar ao nível de significância de 0,05. Resultados: Houve diminuição significativa (P < 0,05 dos parâmetros de bruxismo, de força de mordida e do escore total do QAS após o uso da placa de avanço mandibular por 30 dias. Conclusão: Os resultados sugerem que o uso da placa de avanço mandibular resiliente por um mês reduziu a força de mordida e o bruxismo e melhorou a qualidade do sono nesta amostra

  19. MAPA em portadores de DPOC com dessaturação no sono MAPA en portadores de EPOC con desaturación durante el sueño ABPM in COPD patients with sleep desaturation

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    Neila Anders Aidar

    2009-09-01

    Full Text Available FUNDAMENTO: A hipoxemia no período de sono pode, por mecanismo de ativação simpática, alterar a pressão arterial. Poucos estudos demonstram os parâmetros pressóricos em portadores de DPOC, que não têm apnéia do sono, mas que dessaturam nesse período. OBJETIVOS: Analisar os parâmetros pressóricos em pacientes com DPOC e dessaturação no sono, não causada por apnéia. MÉTODOS: Treze pacientes com DPOC foram submetidos à espirometria, gasometria arterial, polissonografia e MAPA para avaliação pressórica. Quatorze pacientes sem DPOC foram submetidos à espirometria, oximetria e MAPA. As análises pressóricas foram feitas tanto na vigília quanto no sono. Os dois grupos foram constituídos por pacientes sem antecedentes hipertensivos. RESULTADOS: Os dois grupos eram semelhantes em relação à idade, altura, peso e índice de massa corporal. Houve diferença significativa (p FUNDAMENTO: La hipoxemia en el período de sueño puede, por mecanismo de activación simpática, alterar la presión arterial. Pocos estudios demuestran los parámetros de presión en portadores de EPOC, que no tiene apnea del sueño, y que desaturan en ese período. OBJETIVO: Analizar los parámetros de presión en pacientes con EPOC y desaturación en el sueño, no causada por apnea. MÉTODOS: Trece pacientes con EPOC se sometieron a la espirometría, la gasometría arterial, la polisonografía y al MAPA para la evaluación de presión. Un total de 14 pacientes sin EPOC se sometieron a la espirometría, la oximetría y MAPA. Los análisis de presión se hicieron tanto en la vigilia como en el sueño. Los dos grupos estaban conformados por pacientes sin antecedentes hipertensivos. RESULTADOS: Los dos grupos se asemejaban respecto a la edad, la altura, el peso e el índice de masa corporal. Hubo diferencia significativa (p BACKGROUND: Sleep hypoxemia may change blood pressure by sympathetic activation. Few studies have analyzed blood pressure parameters in

  20. Disfunção erétil na síndrome de apneia obstrutiva do sono – Prevalência e determinantes

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    T. Santos

    2012-03-01

    Full Text Available Resumo: Introdução: A SAOS (síndroma de apneia obstrutiva do sono define-se pela ocorrência frequente de obstrução da via aérea superior durante o sono, com múltiplas consequências clínicas. Estudos anteriores sugerem que a SAOS provoca alterações na regulação neural, hormonal e vascular que contribuem para o desenvolvimento de DE (disfunção erétil.Este estudo tem como principais objetivos estimar a prevalência da DE numa amostra de doentes com SAOS e avaliar os seus determinantes. Métodos: Foram incluídos 62 doentes do Laboratório do Sono do Hospital S. João com diagnóstico recente de SAOS, que responderam ao questionário IIEF-5 (International Index Erectile Function-5 Item version. Resultados: A prevalência da DE em pacientes com SAOS foi de 64,4%. A idade e a diabetes constituíram fatores de risco independentes para graus avançados de DE: OR = 1,226 (IC 95%:1,062-1,415 e OR = 31,205 (IC 95%:1,222-796,557, respetivamente. Comparados com pacientes fumadores, o grupo de pacientes ex-fumadores revelou associar-se à DE: OR = 4,32 (IC 95%:1,09-17,11. A hipertensão e o tratamento com IECAS (inibidores da enzima conversora da angiotensina ou ARA (antagonistas dos recetores da angiotensina evidenciaram uma associação com DE: OR = 3,25 (IC 95%:1,09-9,65 e 7,39 (IC 95%:1,52-35,99, respetivamente.Não foi encontrada nenhuma relação no que diz respeito ao IMC (p = 0,254, hábitos alcoólicos (p = 0,357, enfarte agudo do miocárdio (p = 0,315, dislipidemia (p = 0,239 ou síndrome metabólico (p = 0,215 e DE. A gravidade da SAOS não se encontra associada a DE na amostra estudada. Conclusões: A prevalência da DE em doentes com SAOS é elevada. Os determinantes da DE na amostra estudada foram a idade e a diabetes. Ex-fumadores, hipertensão e tratamento com ACEI/ARB tamb

  1. Síndroma de apneia obstrutiva do sono como causa de acidentes de viação Obstructive sleep apnoea syndrome as a cause of road traffic accidents

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    M Aguiar

    2009-05-01

    Full Text Available Vários estudos demonstram que os doentes com síndroma de apneia obstrutiva do sono (SAOS têm um risco aumentado de acidentes de viação. O objectivo do presente trabalho consistiu em analisar, nestes doentes, se há diferenças nos que referem acidentes e/ /ou quase acidentes e aqueles que o não fazem. Material e métodos: Estudaram-se prospectivamente 163 doentes com SAOS (índice apneia/hipopneia (IAH>10/h diagnosticados por polissonografia nocturna (PSG, todos condutores de veículos, 18,4% do quais profissionais. Na altura da entrevista clínica foi inquirido se tinham tido, nos três anos antes acidentes e/ou quase acidentes devido a hipersonia diurna (Grupo II = 74 ou não (Grupo I = 89. Estes dois grupos foram comparados quanto a: idade, índice de massa corporal (IMC, escala de sonolência de Epworth (ESE, PaO2 e PaCO2 diurnas, avaliação da qualidade de vida pelo inquérito Functional Outcomes of Sleep Questionnaire (FOSQ teste e dados da polissonografia - tempo total de sono (TTS, eficiência do sono, estádios do sono, índice de microdespertares (IMD, índice de apneia/hipopneia (IAH, SaO2 mínima e média, % tempo SaO2Several studies have demonstrated that obstructive sleep apnoea syndrome (OSAS patients have a higher rate of road traffic accidents. Our study aimed to analyse any differences in OSAS patients between those who reported having had road traffic accidents and/or near misses and those who did not. Methods: We studied 163 patients with OSAS (apnoea-hypopnoea index (AHI>10/h diagnosed using nocturnal polysomnography (NPSG, all drivers, 18.4% of whom drove for a living. Patients were asked at their first clinical interview to self-report road traffic accidents and/or near misses over the past 3 years which had been caused by abnormal daytime drowsiness. This allowed patients to be divided into two groups, those who had had road traffic accidents and/or near misses and those who had not. Both were compared as to age

  2. Qualidade de Sono e Parâmetros de Dessaturação Nocturna em Doentes com Doença Pulmonar Obstrutiva Crónica e Hipoxémia entre 55-70 mmHg

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    José Moutinho Dos Santos

    2001-03-01

    Full Text Available RESUMO: A dessaturação nocturna é um facto reconhecido em doentes com insuficiência respiratória crónica (IRC sendo sobretudo responsabilizada no seu mecanismo fisiopatológico a redução da ventilação alveolar particularmente durante o sono REM. Este fenómeno é importante em doentes com hipoxémia basal moderada (PaO2 basal entre 55-70 mmHg dada a posição particular da SaO2 na curva de dissociação de hemoglobina. Por outro lado, tem sido referido na literatura alterações da qualidade do sono em doentes com Doença Pulmonar Obstrutiva Crónica que afectam a normal estrutura do sono. O objectivo do trabalho foi avaliar de que modo a qualidade do sono poderia afectar os parâmetros de dessaturação nocturna e a sua definição como doente dessaturador.Vinte doentes (15 homens; 5 mulheres; idade X±dp - 68,2±6,1 anos com IRC estabilizada secundária a DPOC (FEV1 - 1,024±0,431 litros; 47±16,5 % do prognosticado foram submetidos a estudo poligráfico do sono em duas noites consecutivas em ar ambiente, sem medicação sedativa e sob medicação broncodilatora habitual. Na primeira noite de sono o padrão geral foi de insónia e sono fragmentado (aumento do tempo de latência ao sono e do número de “arousals” e diminuição da eficiência do sono com consequente redução do tempo em sono 3-4 e sono REM. Na segunda noite de estudo, verificou-se redução significativa do tempo de latência (72±65,5 vs. 28±31,4 minutos; p=0.008 e aumento da eficiência do sono (52±26,5 vs. 76±13.4%; p<0.0001 sem variação significativa do número de “arousals” e do tempo em sono profundo mas com aumento significativo do sono REM (6±4,8 vs. 11±6,5 %. Não se constataram diferenças significativas nos parâmetros de dessaturação nocturna nas duas noites embora se verifique grande variabilidade

  3. Hábitos de sono relacionados à síndrome da morte súbita do lactente: estudo populacional Sleeping habits related to sudden infant death syndrome: a population-based study

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    Lorena Teresinha Consalter Geib

    2006-02-01

    Full Text Available O estudo transversal, que descreve os hábitos de sono com risco potencial para a síndrome da morte súbita do lactente, incluiu todas as crianças nascidas vivas em 2003, em Passo Fundo, Rio Grande do Sul, Brasil, com coleta de dados nas Declarações de Nascidos Vivos e em entrevistas, analisados com estatística descritiva e teste de qui-quadrado. Dos 2.634 nascidos vivos, selecionaram-se 2.285 (86,75%, com exclusão de 8,4% e perda de 5,2%. Dentre os hábitos protetores, constatou-se, em 77% dos lactentes, uso de vestuário adequado, 90% envolvidos frouxamente, 69% com cobertas de espessura fina, 98% dormindo no quarto dos pais e 56%, no berço. Dos hábitos com potencial risco, observaram-se decúbito lateral (92%, uso de travesseiro (88% e os pés distanciados da borda inferior do berço (96%. Nas classes econômicas pobres, o hábito da criança de compartilhar a cama foi significativo (p = 0,00. Assim, num município com baixa prevalência de síndrome da morte súbita, os lactentes são expostos tanto a hábitos de sono protetores como de risco, sugerindo que, em populações desfavorecidas de países em desenvolvimento, outros fatores de risco dessa síndrome devam ser considerados.This cross-sectional study on sleeping habits with potential risk for sudden infant death syndrome included all live births in Passo Fundo, Rio Grande do Sul, Brazil, in 2003 with data collection from Certificates of Live Birth and interviews, analyzed with descriptive statistics and the qui-squared test. From the 2,634 live births, 2,285 children were selected (86.75%, with 8.4% exclusion and 5.2% losses. Protective habits included 77% of infants with appropriate clothing, 90% loosely wrapped, 69% with thin blankets, 98% sleeping in the parents' bedroom, and 56% in the crib. Potentially risky habits included lateral decubitus (92%, use of a pillow (88%, and feet far from the lower edge of the crib (96%. Among low-income families, bed-sharing with other

  4. Ocorrência da síndrome da apneia obstrutiva do sono (SAOS em crianças respiradoras orais Obstructive sleep apnea syndrome (OSAS in mouth breathing children

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    Suemy Cioffi Izu

    2010-10-01

    Full Text Available É bem estabelecido que a respiração oral em crianças está relacionada à hipertrofia adenoamigdaliana, que é a principal causa de apneia do sono nesta população. Apesar da importância deste tema, há poucos estudos que comprovam a relação entre SAOS e respiração oral. OBJETIVO: Determinar a prevalência de distúrbios respiratórios do sono em crianças respiradoras orais e sua correlação com achados otorrinolaringológicos. MATERIAL E MÉTODO: Foram avaliados retrospectivamente 248 prontuários de crianças respiradoras orais do serviço de Otorrinolaringologia Pediátrica de uma grande instituição entre 2000 e 2006, analisando os achados otorrinolaringológicos, polissonografia, nasofibroscopia e/ou radiografia em perfil do Cavum. O principal dado polissonográfico utilizado foi o índice de apneia (IA. Classificou-se como ronco primário aqueles com IA1. Desenho Científico: Coorte retrospectivo. RESULTADOS: Dos 248 pacientes incluídos, 144 (58% apresentavam ronco primário e 104 (42% apresentavam SAOS. Os achados otorrinolaringológicos mais frequentes foram Hipertrofia adenoamigdaliana (n=152; 61,2%, Hipertrofia de tonsila palatina (n=17; 6,8% Hipertrofia da tonsila faríngea (n=37; 14,9%, Rinite Alérgica (n=155; 62,5% e Otite Secretora (36; 14,5%. CONCLUSÕES: Ronco Primário e SAOS são frequentes em crianças respiradoras orais. A afecção otorrinolaringológica mais encontrada em crianças com SAOS é a hipertrofia adenoamigdaliana acompanhada ou não de rinite alérgica.It is well known that mouth breathing is associated with adenotonsillar hypertrophy - which is the main cause of obstructive sleep apnea among children. Despite the importance of this matter, there are only a handful of studies showing the relationship between OSAS and mouth breathing. AIM: to determine the prevalence of obstructive sleep disorders in mouth breathing children and study its correlation with otorhinolaryngological findings. STUDY

  5. Sleep and rest needs of seniors: a study grounded in the work of Henderson Necesidades relacionadas al sueño/reposo de ancianos: estudio fundamentado en Henderson Necessidades relacionadas ao sono/repouso de idosos: estudo fundamentado em Henderson

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    Jorge Wilker Bezerra Clares

    2012-01-01

    .OBJETIVO: Analisar as demandas de necessidades relacionadas ao sono/repouso de uma população idosa no âmbito da Estratégia Saúde da Família, fundamentada no referencial de Virgínia Henderson. MÉTODOS: Estudo de abordagem quantitativa, descritivo, realizado entre maio e junho de 2011, mediante aplicação de formulário a 52 idosos residentes na área coberta por uma unidade básica de saúde de Fortaleza-CE. Os dados foram analisados por meio de software estatístico. RESULTADOS: Os problemas de sono mais comum entre os idosos foram: dormir menos de 4 horas por noite (84,6%, sonolência diurna (71,2%, despertares noturnos (71,2%, uso de medicamentos para dormir (21,2%. A análise de associação mostrou-se significativa com as variáveis, idade (p=0,05, presença de morbidade (p=0,02, tabagismo (p=0,01 e dor ao mover-se (p=0,05. CONCLUSÃO: As demandas para a necessidade de dormir/repousar nos idosos estiveram associadas significativamente a fatores socioeconômicos e condições de saúde.

  6. Perfil cardiovascular em pacientes com apneia obstrutiva do sono Perfil cardiovascular en pacientes con apnea obstructiva del sueño Cardiovascular profile in patients with obstructive sleep apnea

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    Fátima Dumas Cintra

    2011-04-01

    Full Text Available FUNDAMENTO: Apneia Obstrutiva do Sono (AOS é um fator de risco para várias condições cardiovasculares incluindo aumento na mortalidade cardiovascular. Sendo assim, é essencial o conhecimento das principais repercussões cardiovasculares dos distúrbios respiratórios do sono durante uma avaliação clínica. OBJETIVO: Analisar as características cardiovasculares de pacientes com AOS. MÉTODOS: Pacientes submetidos a polissonografia basal foram consecutivamente selecionados do banco de dados do Instituto do Sono entre março de 2007 e março de 2009. Todos os pacientes foram orientados a comparecer ao ambulatório para coleta de sangue, exame físico, eletrocardiograma de 12 derivações, espirometria, teste cardiopulmonar em esteira ergométrica e ecocardiograma transtorácico. O estudo foi aprovado pelo comitê de ética e pesquisa e registrado no site http://clinicaltrials.gov/ sob o número: NCT00768625. RESULTADOS: Foram analisados 261 pacientes e 108 controles. As principais características dos pacientes com AOS foram: obesidade, hipertensão, baixos níveis plasmáticos de lipoproteínas de alta densidade (HDL e aumento no diâmetro do átrio esquerdo quando comparados com controles (3,75 ± 0,42; 3,61 ± 0,41, p = 0,001, respectivamente. Essas características associadas correspondem a um acréscimo de 16,6 vezes na probabilidade de ocorrência de AOS independentemente do relato de algum sintoma dessa desordem, como sonolência ou ronco. CONCLUSÃO: Na amostra avaliada, o perfil cardiovascular dos pacientes com AOS mais encontrado foi: obesidade, hipertensão arterial, baixos níveis plasmáticos de HDL e átrio esquerdo com diâmetro aumentado.FUNDAMENTO: Apnea obstructiva del sueño (AOS es un factor de riesgo para diversas condiciones cardiovasculares, incluido el aumento en la mortalidad cardiovascular. Por tanto, es imprescindible conocer las principales repercusiones cardiovasculares de los trastornos respiratorios del sue

  7. Influência da reabilitação pulmonar sobre o padrão de sono de pacientes portadores de doença pulmonar obstrutiva crônica Influence of pulmonary rehabilitation on the sleep patterns of patients with chronic obstructive pulmonary disease

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    Renata Claudia Zanchet

    2004-10-01

    Full Text Available INTRODUÇÃO: A Reabilitação Pulmonar (RP melhora a qualidade de vida de pacientes portadores de doença pulmonar obstrutiva crônica (DPOC. No entanto, o papel da RP sobre o padrão de sono destes pacientes ainda não está estabelecido. OBJETIVO: Avaliar a influência da RP sobre o padrão de sono de pacientes portadores de DPOC. MÉTODO: Foram estudados 27 pacientes (22 homens, que foram submetidos a exames espirométricos, gasométricos, antropométricos e polissonográficos antes e depois de seis semanas de RP, além de responderem a escala de sonolência de Epworth. A análise estatística foi realizada pelo teste t de Student para amostras pareadas, ANOVA e o teste de comparações múltiplas Newmans-Keuls. RESULTADOS: Observamos que os pacientes estudados tinham idade média de 63 ± 5 anos, VEF1 = 55 ± 25% do previsto, VEF1/CVF = 50 ± 12%, PaO2 em repouso de 70 ± 7mmHg e SaO2 igual a 94 ± 2%. A polissonografia revelou sono fragmentado, redução do sono delta e dessaturação da hemoglobina, cujas maiores quedas ocorreram durante o sono REM. Não houve diferença estatisticamente significativa (p>0,05 na comparação entre as variáveis estudadas antes e após RP. CONCLUSÃO: No grupo de pacientes estudados, o programa de RP não modificou o padrão de sono.BACKGROUND: Pulmonary Rehabilitation (PR improves the quality of life of chronic obstructive pulmonary disease (COPD patients. However, the influence of PR on the sleep pattern of these patients is unknown. OBJECTIVE: To evaluate the influence of PR on the sleep patterns of patients with COPD. METHOD: A total of 27 patients (22 men/5 women were submitted to polysomnographic, gasometric and anthropometric studies before and after six weeks of PR and were evaluated using the Epworth Sleepiness Scale. The results were analyzed using paired Student's t-test, ANOVA and Newman-Keuls multiple comparison test. RESULTS: Mean age was 63.3 ± 5.3 years, mean FEV1 was 54.8 ± 25.4% of

  8. Qualidade do sono de idosos residentes em instituição de longa permanência Calidad del sueño de ancianos residentes en instituciones de larga permanencia Sleep quality of elders living in long-term care institutions

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    Claudia Lysia de Oliveira Araújo

    2010-09-01

    Full Text Available Este estudo teve como objetivo avaliar a qualidade do sono de idosos residentes em quatro instituições de longa permanência para idosos (ILPI de uma cidade do interior do estado de São Paulo e identificar problemas relacionados ao sono. Participaram 38 idosos, cujas funções cognitivas estavam preservadas e que residiam nas ILPI há pelo menos um ano. Foram empregues os instrumentos Ficha de Identificação, Índice de Katz e Índice de Qualidade do Sono de Pittsburgh (PSQI, todos preenchidos pela pesquisadora. Os resultados mostraram que 81,6% dos idosos referiam qualidade do sono boa ou muito boa; entretanto, os seguintes problemas relacionados ao sono destacaram-se por sua elevada frequência: levantar-se para ir ao banheiro (63,2%; acordar no meio da noite ou muito cedo pela manhã (50%; sentir muito calor (23,7%; sentir dores (21,1%. Evidencia-se uma contradição entre a percepção da qualidade do sono e o elevado número de problemas identificados.Este estudio tuvo como objetivo evaluar la calidad del sueño de ancianos residentes en cuatro instituciones de larga permanencia para ancianos (ILPI, siglas en portugués de una ciudad del interior del estado de San Pablo, Brasil, e identificar problemas relacionados con el sueño. Participaron 38 anciano, cuyas funciones cognitivas estaban preservadas y que habían residido en las ILPI por lo menos por un año. Fueron empleados los instrumentos Ficha de Identificación, Índice de Katz e Índice de Calidad del Sueño de Pittsburgh (PSQI, todos completados por la investigadora. Los resultados demostraron que el 81,6% de los ancianos referían calidad de sueño buena o muy buena, mientras que os siguientes problemas relacionados al sueño se destacaron por su elevada frecuencia: levantarse para ir al baño (63,2%, despertar en medio de la noche o por la mañana demasiado temprano (50%, sentir mucho calor (23,7%, sentir dolores (21,1%. Se evidencia una contradicción entre la percepción de

  9. Qualidade do sono em pacientes idosos com patologias vasculares periféricas Calidad del sueño en pacientes de la tercera edad con patologías vasculares periféricas Sleep quality in aged patients with peripheral vascular diseases

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    Karina Corrêa

    2008-03-01

    Full Text Available Patologias vasculares periféricas freqüentemente acometem idosos e, sendo crônicas, interferem na qualidade de vida desses indivíduos, inclusive no sono. Portanto, este estudo objetivou avaliar a qualidade do sono de idosos com patologias vasculares periféricas em acompanhamento ambulatorial no Hospital das Clínicas da Universidade Estadual de Campinas. Os voluntários (n=50, idade média de 74 8 anos responderam ao Índice de Qualidade de Sono de Pittsburgh (PSQI, forneceram dados sociodemográficos e sobre a vasculopatia (35 idosos apresentavam obstrução arterial em membros inferiores. Verificou-se que 34 idosos apresentavam sono de má qualidade. A duração do sono era de 5,8 ( 2,3 horas e, segundo 23 idosos, as dores perturbavam o sono noturno freqüentemente (três vezes na semana ou mais. Somente 18 idosos usavam analgésicos e quatro, medicamentos para dormir. Os achados podem subsidiar o enfermeiro na implementação de medidas para melhorar esse quadro e promover a qualidade de vida das pessoas acometidas.Las patologías vasculares periféricas frecuentemente acometen a las personas de la tercera edad y, siendo crónicas, interfieren en la calidad de vida de esos individuos, inclusive en el sueño. Por tanto, en este estudio se tuvo por objetivo evaluar la calidad del sueño de personas de la tercera edad con patologías vasculares periféricas en tratamiento ambulatorio en el Hospital de las Clínicas de la Universidad Estatal de Campinas. Los voluntarios (n=50, edad media de 74 8 años respondieron al Índice de Calidad de Sueño de Pittsburgh (PSQI, proporcionaron sus datos sociodemográficos y sobre la vasculopatía (35 personas de la tercera edad presentaban obstrucción arterial en miembros inferiores. Se verificó que 34 personas de la tercera edad presentaban sueño de mala calidad. La duración del sueño era de 5,8 ( 2,3 horas y, según 23 de los participantes, los dolores perturbaban su sueño nocturno frecuentemente

  10. What do petrochemical workers, healthcare workers, and truck drivers have in common? Evaluation of sleep and alertness in Brazilian shiftworkers O que têm em comum os trabalhadores da indústria petroquímica, profissionais de saúde e caminhoneiros? Sono e vigília entre trabalhadores em turnos no Brasil

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    Frida Marina Fischer

    2004-12-01

    Full Text Available The article reports briefly on some effects of shiftwork and the work environment on health and wellbeing of shiftworkers. Studies of Brazilian shiftworkers (healthcare workers, petrochemical workers, and truck drivers are described. A similar methodology was used to evaluate sleep and alertness in all these studies. The evaluation of sleep duration and quality and alertness showed similar results in the three studies. Although the workers were in different work settings, performing different jobs, the results are similar: daytime sleep is reduced and perceived as having worse quality than nighttime sleep; alertness decreases as the night work progresses. The study highlights the importance of shiftwork schedules' features and work organization for workers' health, wellbeing, and safety.Este artigo apresenta de forma resumida os efeitos do trabalho em turnos na saúde e bem-estar dos trabalhadores. São apresentados estudos conduzidos em hospitais, indústria petroquímica e companhias de caminhões de carga. Foi utilizada metodologia semelhante nos estudos descritos para avaliação da duração e qualidade do sono, assim como do alerta durante o trabalho. Apesar dos trabalhadores realizarem tarefas bastante distintas, os resultados das avaliações de sono e alerta foram semelhantes: os trabalhadores após turnos noturnos apresentaram sono mais curto do que após outros turnos, comparados consigo mesmos e/ou com seus colegas de turnos diurnos. É enfatizada a importância da escala em turnos, assim como da organização do trabalho, para auxiliar os trabalhadores a manterem sua saúde, bem-estar e segurança no trabalho.

  11. Efeito do treinamento físico e da dieta hipocalórica na modulação autonômica simpática em pacientes com síndrome metabólica e apneia obstrutiva do sono

    OpenAIRE

    Edgar Toschi Dias

    2013-01-01

    INTRODUÇÃO: Pacientes com síndrome metabólica (SMet) apresentam aumento na atividade nervosa simpática muscular (ANSM) e diminuição no ganho do controle barorreflexo arterial (CBR). E, a apnéia obstrutiva do sono (AOS), uma comorbidade frequentemente encontrada em pacientes com SMet, exacerba essas disfunções autonômicas. Sabe-se que a incidência dos disparos e o padrão oscilatório da ANSM dependem do ganho (sensibilidade) e do tempo de retardo (latência) do CBR da ANSM (CBRANSM). Contudo, o ...

  12. Sonolência diurna excessiva pós-traumatismo de crânio: associação com movimentos periódicos de pernas e distúrbio de comportamento do sono REM: relato de caso Excessive daytime sleepiness after traumatic brain injury: association with periodic limb movements and REM behavior disorder: case report

    Directory of Open Access Journals (Sweden)

    Raimundo Nonato D. Rodrigues

    2002-09-01

    Full Text Available Um homem de 52 anos, procurou o Hospital. Universitário de Brasília com queixa de sono agitado. Sua esposa relatava, desde há cerca de 10 anos, intensa movimentação de membros e agressividade em meio a sonhos violentos. Desde então apresentava sonolência diurna excessiva. Havia relato de traumatismo de crânio há 34 anos e coma de 2 meses de duração. A vídeo-polissonografia revelou comportamento agressivo e agitado durante o sono REM, e movimentos periódicos de pernas. Havia importante sonolência diurna no teste de latências de sono. Foi instituído tratamento com levodopa-benzerazida 100/25 mg à noite. Após 10 semanas de evolução, houve melhora da movimentação noturna global, e desaparecimento dos episódios ligados a sonhos de conteúdo violento. Este caso nos permite analisar a associação entre trauma craniano e alterações nas vias dopaminérgicas (movimentos periódicos das pernas e distúrbio de comportamento do sono REM e revisar a importância dos distúrbios na produção de hipocretina hipotalâmica na fisiopatologia desse quadro clínico.A 52 year-old male patient, had complaint of "restless sleep". His wife informed that for the past ten years the patient had presented intense and aggressive body movements, and sometimes, violent dreams. The patient also complained of excessive daytime sleepiness. His relevant previous medical history included a traumatic brain injury at the age of 28 which left him in coma for two months. A video-polysomnography showed periodic leg movements and, during REM sleep, aggressive and agitated behaviour. The multiple sleep latency test revealed extremely short latencies. Initially, he was treated with levodopa-benzerazide, 100/25 mg, 2 hours before bedtime. After 10 weeks his overnight behaviour pattern improved and leg movements diminished. This case supports the hypothesis of an association between cranial trauma and alterations in the dopaminergic pathways represented by periodic

  13. Comparação entre o efeito do aumento da dimensão vertical de oclusão e do avanço mandibular na qualidade do sono em pacientes idosos portadores de próteses totais bimaxilares

    OpenAIRE

    Thiago Carôso Fróes

    2011-01-01

    A população idosa possui alta prevalência de edentulismo e, conseqüentemente, é afetada pelos problemas a ele associados. A perda da dimensão vertical de oclusão (DVO) é um destes problemas que compromete, entre outros fatores, o desempenho do sistema estomatognático. Logo, doenças relacionadas ao colapso da musculatura da via aérea superior (VAS), como a síndrome da apnéia obstrutiva do sono (SAOS), tornam-se enfermidades relevantes para pacientes nesta faixa etária. Sendo assim, medidas ter...

  14. Avaliação dos níveis séricos de testosterona em pacientes com síndrome da apneia obstrutiva do sono Evaluation of testosterone serum levels in patients with obstructive sleep apnea syndrome

    Directory of Open Access Journals (Sweden)

    Fernando Drimel Molina

    2011-02-01

    Full Text Available Homens com síndrome da apneia obstrutiva do sono (SAOS podem apresentar diminuição dos níveis de testosterona devido à hipóxia. OBJETIVOS: Relacionar os níveis séricos da testosterona, em pacientes com SAOS, com parâmetros clínico-laboratoriais. MATERIAL E MÉTODOS: Foram revisados 103 prontuários de pacientes com SAOS, entre os anos de 2002 e 2009, e coletados os seguintes dados: idade à época da realização da polissonografia, valores do Hematócrito e Hemoglobina, nível sérico da testosterona total, IMC, índice de apneia/hipopneia(IAH e SatO2. FORMA DO ESTUDO: Estudo de casos retrospectivo em corte transversal. RESULTADOS: 79 pacientes (77% não apresentaram alteração hormonal e 24 (23% apresentaram níveis séricos inferiores. Dos pacientes com testosterona normal 70% estavam com sobrepeso, enquanto que 63% com testosterona alterada apresentaram obesidade grau I (pMales with obstructive sleep apnea syndrome (OSAS may present decreased testosterone serum levels because of hypoxemia. AIM: To correlate testosterone levels in OSAS patients with laboratory parameters. MATERIAL AND METHODS: 103 registries of OSAS patients were reviewed from 2002 to 2009. The following data collected: age when polysomnography was done, hematocrit and hemoglobin levels, total testosterone serum levels, BMI, apnea/hypopnea index (AHI, and O2 saturation. STUDY DESIGN: A cross-sectional retrospective case study. RESULTS: 79 patients (77% had no hormonal changes, and 24 patients (23% had decreased serum levels. In patients with normal testosterone levels, 70% were overweight; 63% with altered testosterone levels had obesity grade I (p<0.05. Patients with altered testosterone levels had significantly lower average doses of Ht, Hb and androgen compared to patients without altered androgen levels. The average BMI of patients with altered hormone levels was significantly higher compared to patients with normal hormone levels. CONCLUSIONS: The relationship

  15. Prevalência de insónia de novo em doentes com síndrome de apneia obstrutiva do sono tratados com suporte ventilatório nocturno

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    P. Caetano Mota

    2012-01-01

    Full Text Available Resumo: Introdução: A insónia de novo (IN associada ao uso do suporte ventilatório nocturno (SVN tem sido uma realidade constatada na prática clínica, contudo é de salientar a escassez de dados referentes à sua prevalência. O nosso objectivo consistiu em determinar a prevalência de IN e seus factores de risco em doentes com síndrome de apneia obstrutiva do sono (SAOS sob SVN. Material e métodos: Estudo descritivo transversal que incluiu 80 doentes com SAOS sob SVN. Efectuada comparação entre dois grupos, com e sem IN, relativamente a características demográficas, relacionadas com a doença, e personalidade. Foram excluídos os doentes sob medicação ansiolítica e/ou antidepressiva, com perda ponderal superior ou igual a 10%, e com sintomas da síndrome das pernas inquietas. Resultados: A mediana de idades dos doentes incluídos foi de 60,0 (intervalo interquartil (IIQ 10,0 anos; 82,5% eram do sexo masculino. Os valores iniciais medianos da escala de sonolência de Epworth (ESE e do índice de apneia-hipopneia (IAH foram de 12,5 (IIQ 9,0 e de 44,1 (IIQ 22,4/h, respectivamente. A maioria dos doentes (91,3% estava sob pressão positiva nas vias aéreas em modo automático (auto-adjusting positive airway pressure (APAP. A insónia prévia ao uso de SVN estava presente em 30% (n = 24 dos doentes. A prevalência de IN foi de 21,4% (12/56 e os subtipos de insónia inicial e/ou intermédia foram os mais frequentes (n = 11. Foi encontrada uma relação negativa estatisticamente significativa entre a IN e a pressão em 90% do tempo de SVN (P90 (p = 0.040. Conclusões: Os doentes com SAOS sob SVN apresentaram uma prevalência elevada de IN. Os doentes com IN apresentaram níveis inferiores de pressão de SVN comparativamente com os outros. Abstract: Introduction: New-onset insomnia (NOI associated with nocturnal ventilatory support (NVS is

  16. Diferenças entre os Sexos no Aproveitamento Escolar, na Sintomatologia de Stress e na Qualidade do Sono em um Grupo de Adolescentes The Differences between the Gender in School Performance, in the Symptoms of Stress and Sleep Quality in a Group of Adolescents

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    Gema Galgani de Mesquita Duarte

    2014-03-01

    Full Text Available Objetivo: Este estudo, pioneiro no Brasil, apresentado à Faculdade de Ciências Médicas (UNICAMP, em caráter dissertativo, transversal descritivo, teve por objetivo relacionar as variáveis: aproveitamento escolar, stress e qualidade do sono em um grupo de adolescentes do ensino médio. Materiais e métodos: amostra de 160 adolescentes, ambos os gêneros, entre 15 a 18 anos, estudantes do ensino médio na cidade de Alfenas, Minas Gerais, Brasil. Para a coleta de dados, utilizou-se dos instrumentos: 1 Índice de Qualidade de Sono de Pittsburgh (IQSP; 2 Inventário de sintomas de stress para adultos de Lipp (ISSL; 3 Boletins dos alunos, por meio dos quais foram recolhidas as faltas e as notas. Resultados: Dentre os participantes, 65,63% são do gênero feminino. Em se tratando do aproveitamento escolar, observaram-se as médias 0,64 para o grupo feminino (F e 0,60 para o masculino (M (p=0,04. Para o número de faltas, têm-se as médias de 28,1 (F e de 30,3 (M (p=0,7440. Em relação à sintomatologia de stress, 65,71% (F e 29,09% (M foram classificados estressados e 34,29% (F e 70,91% (M não apresentaram sintomas de estresse (p< 0,001. Referente à qualidade do sono, observou-se que as mulheres apresentaram pior qualidade, sendo a média 6,0 (F e de 5,3 (M (p=0,27; na classificação do sono, 68,57% (F e 61,82% (M não dormem bem. Conclusão: O grupo feminino apresentou melhor aproveitamento nas atividades escolares, com notas mais elevadas e maior assiduidade, maior sintomatologia de stress e pior qualidade do sono. Objective: This dissertational, transversal and descriptive study, presented at the School of Medical Sciences of UNICAMP, aims at establishing a connection between the variables “school learning”, “stress” and “sleep quality” in high school adolescents. Materials and Methods: A sample of 160 high-school students of both genders, aged 15-18 years, in Alfenas, Minas Gerais, Brazil. For data collection, the following

  17. Prevalência de fatores de risco para a síndrome da apnéia obstrutiva do sono em motoristas de ônibus interestadual Prevalence of risk factors for obstructive sleep apnea syndrome in interstate bus drivers

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    Carlos Alberto de Assis Viegas

    2006-04-01

    Full Text Available OBJETIVO: Verificar a prevalência de fatores de risco para a síndrome da apnéia obstrutiva do sono em motoristas de ônibus interestadual. MÉTODOS: Foram avaliados 262 motoristas profissionais de ônibus interestadual, de empresa brasileira baseada no Distrito Federal, por questionário para avaliar distúrbios respiratórios do Sono, Escala de Sonolência de Epworth, testes de atenção concentrada e difusa, e medidas antropométricas. RESULTADOS: Encontravam-se com o peso acima do ideal 68% da amostra estudada, dos quais 34% apresentaram circunferência do pescoço = 42 cm. Durante o trabalho os motoristas referiram uso de tabaco (27%, refrigerantes à base de cola (55%, álcool (65% e café (88%, e 28% dos motoristas apresentaram mais de dez pontos na Escala de Sonolência de Epworth. Houve ainda 36% de roncadores, 5% referiram paradas respiratórias durante o sono, 12% apresentaram sensação de sufocamento, 29% sono agitado e 48% referiram sentir sono ao dirigir. Já se envolveram em acidentes de trânsito 42% dos motoristas e em 7,6% dos casos o acidente foi devido a sonolência excessiva. Aqueles com mais de dez pontos na Escala de Sonolência de Epworth apresentaram nível de atenção concentrada comprometido e quanto maior a circunferência do pescoço e a hipersonolência, menor a atenção difusa. CONCLUSÃO: No grupo de motoristas estudados, há uso alarmante de substâncias estimulantes e alta prevalência de hipersonolência diurna, que leva a diminuição da atenção.OBJECTIVE: To determine the prevalence of risk factors for obstructive sleep apnea syndrome in interstate bus drivers. METHODS: This study involved 262 professional interstate bus drivers employed by a Brazilian company headquartered in the Federal District. The drivers were evaluated using a questionnaire designed to assess respiratory sleep disorders, the Epworth Sleepiness Scale, test of sustained attention, test of divided attention and anthropometric

  18. Padrões de sono de estudantes ingressantes na Graduação em Enfermagem Padrones de sueño de estudiantes de enfermería en lo primero-año Sleep patterns of first-year nursing students

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    Renata Furlani

    2005-06-01

    Full Text Available Trata-se de estudo exploratório e descritivo com o objetivo de identificar os padrões de sono de estudantes ingressantes na graduação. Desenvolvido na Universidade Estadual de Campinas SP, os dados foram coletados em dois momentos distintos por meio do Índice de Qualidade de Sono de Pittsburgh. Durante as férias, os estudantes apresentaram melhor qualidade/ duração de sono e adoção de horários mais condizentes com seu cronotipo. Após o início das aulas, maior número apresentou sono de má qualidade e indisposição durante o dia, talvez decorrente de maior sujeição aos horários da universidade ou à adoção de hábitos irregulares de sono. Tais achados podem estar relacionados com o desempenho acadêmico dos estudantes o que destaca a importância do desenvolvimento de estudos futuros.Estudio exploratório/ descriptivo, describe patrones de sueño de estudiantes universitarios de primer año da Universidad Estadual de Campinas, Brasil. Se colecto información en dos ocasiones mediante el Pittsburgh Sleep Quality Index. Resultados mostraron que los estudiantes reportan sueño de mejor calidad y duración prolongada durante las vacaciones y hábitos de sueño en conformidad con el cronotipo. Después del comienzo de clases, gran numero de estudiantes reporto sueño de calidad pobre y indisposición durante el día que pueden ser atribuidos al cambio de horario que la universidad impone sobre ellos o a la irregularidad de patrones de sueño adquiridos. Posible relación entre estos câmbios en los patrones de sueño y desempeño académico, enfatiza la importancia de otros estudios en esta área.This exploratory and descriptive study aimed at describing sleep patterns of first-year university students at the beginning of their course. The study was conducted at Campinas State University, Brazil. Data were collected in two points of time using Pittsburgh Sleep Quality Index. Results showed that students report sleep of better

  19. Avaliação da obstrução da via aérea superior através da videonasofaringoscopia: comparação da manobra de Müller com o sono induzido Evaluation of airway obstruction by nasopharyngoscopy: comparison of the Müller maneuver versus induced sleep

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    Marcelo Gervilla Gregório

    2007-10-01

    Full Text Available A nasofaringoscopia com realização de Manobra de Müller é freqüentemente utilizada para determinar o local da obstrução na via aérea superior. No entanto, sua utilidade é controversa, uma vez que é realizada com o paciente acordado e pode não reproduzir os fenômenos obstrutivos que ocorrem durante o sono. OBJETIVOS: Comparar o grau de obstrução faríngea nas regiões retropalatal e retrolingual que ocorrem durante a manobra de Müller com aquelas que ocorrem durante o sono induzido. MATERIAL E MÉTODOS: Estudo prospectivo de 8 pacientes (3 homens e 5 mulheres com idade (média ±desvio padrão de 48,6 ± 9,2 anos de idade através de videonasofaringoscopia durante a manobra de Müller e durante o sono induzido por midazolam endovenoso. RESULTADOS: Observamos obstrução retropalatal similar durante a manobra de Müller e sono induzido (média + desvio padrão 3,13 + 0,99 e 2,75 + 0,46, respectivamente, p= 0,234. Em contraste, a obstrução retrolingual foi significantemente menor durante a manobra de Müller (média + desvio padrão 0,63 + 1,06 e 2,63 + 1,30, respectivamente, p= 0,005. CONCLUSÃO: O método do sono induzido foi seguro sob as condições de monitorização adotadas, tendo detectado maior ocorrência de colapso retrolingual do que a manobra de Müller.The use of nasopharyngoscopy during the application of intrathoracic pressure (Müller maneuver is frequently employed to establish the site of upper airway obstruction. The Müller maneuver, however, is used when the patient is awake and therefore may not correlate with obstruction occurring during sleep. AIM: to compare the degree of pharyngeal obstruction in the retropalatal and retroglossal regions during the Müller maneuver versus induced sleep using nasopharyngoscopy. STUDY DESIGN: A prospective, case series study. MATERIAL AND METHODS: Eight patients (three males, five females, with a mean age of 48.6 +/- 9,2 year, underwent nasopharyngoscopy to assess airway

  20. Sono-luminescence and nuclear fusion

    International Nuclear Information System (INIS)

    Seife, Ch.; Hilgenfeldt, S.; Lohse, D.

    2002-01-01

    This article presents multi-bubble and single-bubble luminescence. Since long scientists have known that ultra-sound waves could trigger the formation of bubbles in water (phenomenon called cavitation) but in 1930, for the first time experiments showed that these bubbles could emit light in particular conditions. In 1989 F. Gaitan succeeded in trapping a single bubble by using stationary ultra-sound waves, this bubble was exploding 20.000 times per second according to the frequency of the wave while emitting a series of flashes of light. Some scientists thought that the gas inside the bubble could reach very high values of temperature and pressure, and proposed the possibility of nuclear fusion to explain the excess of neutrons that has been evidenced in a cavitation experiment with deuterated acetone. The last part of this article describes the controversy triggered by the article describing this experiment, that was published by 'Science' in march 2002. (A.C.)

  1. Degradation of surfactants by sono-irradiation

    International Nuclear Information System (INIS)

    Ashokkumar, M.; Grieser, F.; Vinodgopal, K.

    2000-01-01

    Full text: The ultrasound induced decomposition of a commercially available polydisperse nonylphenol ethoxylate surfactant (Teric GN9) has been investigated. Nearly 90% mineralization and/or degradation into volatile products of the surfactant is achieved after sonication for 24 hours. Ultrasound has been found to be a useful tool to achieve a number of chemical processes. Linear and branched alkyl benzene sulfonates and alkyl nonylphenol ethoxylates are widely used surfactants which accumulated in the environment and contribute to a well-recognised pollution problem. We have investigated the use of ultrasound in the degradation of both types of surfactants with the aim of understanding the mechanism of degradation in order to optimise the decomposition process. In this presentation, we report on the sonochemical degradation of Teric GN9- polydisperse, a nonylphenol ethoxylate with an average of 9 ethylene oxide units. The ultrasound unit used for the degradation studies of the surfactant solutions was an Allied Signal (ELAC Nautik) RF generator and transducer with a plate diameter of 54.5 mm operated at 363 kHz in continuous wave mode at an intensity of 2 W/cm 2 . Ultrasound induced cavitation events generate primary radicals inside gas/vapour filled bubbles. Due to the extreme conditions (T ∼ 5000 K; P ∼ 100 atm) generated within the collapsing bubble, H and OH radicals are produced by the homolysis of water molecules, if water is the medium of sonication. These primary radicals attack the surfactant molecules adsorbed at the bubble/water interface. The initial rate of reaction of the surfactant was found to be dependent on the monomer concentration in solution below and above the critical micelle concentration of the surfactants. This result strongly suggests that the initial radical attack on the surfactants occurs at the cavitation bubble/solution interface, followed by oxidative decomposition and pyrolysis of volatile fragments of the surfactant within the bubble. Complete mineralisation/decomposition has been found to be a slow process. Evidence will be provided during the presentation to support these arguments

  2. Mongolian coal liquefaction test; Mongorutan no ekika tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Yamamoto, H.; Kubo, H. [Mitsui SRC Development Co. Ltd., Tokyo (Japan); Tsedevsuren, T. [National Research Center of Chemistry and Technology of Coal in Mongoria (Mongolia)

    1996-10-28

    This paper describes the results of liquefaction tests of Mongolian coals using an autoclave and a flow micro reactor. Uvdughudag coal, Hootiinhonhor coal, and Shivee-Ovoo coal were used for liquefaction tests with an autoclave. Oil yields of Uvdughudag and Hootiinhonhor coals were 55.56 wt% and 55.29 wt%, respectively, which were similar to that of Wyoming coal. Similar results were obtained, as to produced gas and water yields. These coals were found to be suitable for coal liquefaction. Lower oil yield, 42.55 wt% was obtained for Shivee-Ovoo coal, which was not suitable for liquefaction. Liquefaction tests were conducted for Uvdughudag coal with a flow micro reactor. The oil yield was 55.7 wt%, which was also similar to that of Wyoming coal, 56.1 wt%. Hydrogen consumption of Uvdughudag coal was also similar to that of Wyoming coal. From these, Uvdughudag coal can be a prospective coal for liquefaction. From the distillation distribution of oil, distillate fraction yield below 350{degree}C of Uvdughudag coal was 50.7 wt%, which was much higher than that of Wyoming coal, 35.6 wt%. Uvdughudag coal is a coal with high light oil fraction yield. 2 figs., 5 tabs.

  3. Critérios diagnósticos e tratamento dos distúrbios respiratórios do sono: RERA Diagnostic criteria and treatment for sleep-disordered breathing: RERA

    Directory of Open Access Journals (Sweden)

    Luciana de Oliveira Palombini

    2010-06-01

    Full Text Available Na polissonografia, RERA é definido como um parâmetro respiratório que indica um despertar associado a um evento respiratório e um aumento do esforço respiratório. Inicialmente, RERA foi descrito com o uso da manometria esofágica utilizada para avaliação do esforço respiratório. Esse maior esforço respiratório ocorre como resposta a um aumento da resistência da via aérea superior, aspecto presente na fisiopatologia dos distúrbios respiratórios do sono, entre esses, SAOS e SRVAS. Posteriormente, o uso de cânula de pressão nasal foi relatado como uma maneira confiável e mais sensível que o termistor para a identificação de eventos de redução do fluxo aéreo e também como um substituto da manometria esofágica para a identificação de períodos de aumento da resistência na via aérea superior. Consequentemente, a American Academy of Sleep Medicine recomenda o uso de um dos métodos para a identificação de RERA, que é definido por um padrão de achatamento da curva inspiratória, característico da limitação ao fluxo aéreo. Embora RERA seja identificado e avaliado na pratica médica, sua padronização ainda é necessária. Portanto, recomenda-se que os laudos de polissonografia indiquem quais eventos respiratórios anormais foram considerados na avaliação do grau de gravidade do distúrbio respiratório.In polysomnography, RERA is defined as a respiratory parameter that indicates an arousal associated with a respiratory event and an increase in respiratory effort. Initially, RERA was described by means of esophageal manometry for the evaluation of respiratory effort. This greater respiratory effort occurs as a response to an increase in upper airway resistance, which is a factor present in the pathophysiology of sleep-disordered breathing, such as obstructive sleep apnea syndrome and upper airway resistance syndrome. Later, the use of a nasal pressure cannula was reported to be a reliable means of identifying

  4. Avaliação do padrão e das queixas relativas ao sono, cronotipo e adaptação ao fuso horário dos atletas brasileiros participantes da paraolimpíada em Sidney - 2000 Evaluation of sleep patterns and sleep-related complaints, chronotype, and time zone adaptation of Brazilian athletes participant in the Sydney 2000 paralympic games

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    Marco Túlio de Mello

    2002-06-01

    Full Text Available Diversas metodologias têm sido desenvolvidas para investigar a qualidade e as principais queixas e distúrbios relacionados ao sono. Uma forma conhecida de investigar as características temporais dos organismos é a cronobiologia, ciência divide a população em três cronotipos básicos para avaliar as diferenças individuais na prevalência pelos horários de vigília e de sono: os matutinos, os vespertinos e os indiferentes. Outro ponto importante, é que existem poucos estudos relacionando o padrão do sono em indivíduos com necessidades especiais e a atividade física. O sono é considerado como restaurador e o exercício está associado diversas alterações no padrão de sono. A maioria dos estudos referente ao feito do exercício sobre o sono podem ser abordados ou correlacionados com a teoria de restauração das funções do sono. O objetivo deste estudo foi o de avaliar o padrão, queixas relativas ao sono, cronotipo e adaptação ao fuso horário de Sidney dos atletas brasileiros que disputaram a paraolimpíada em 2000. Participaram da avaliação 64 atletas paraolímpicos, com idades de 26,3 (± 5,9. Todos os atletas responderam aos questionários de padrão e queixas relativas ao sono e cronotipo, passando também por uma adaptação ao fuso horário de Sidney. Oprocesso de sincronização ao fuso horário foi realizado de forma abrupta, na tentativa de romper com o ciclo claro-escuro que estava relacionado ao horário brasileiro. Os resultados demonstram que 34,4% dos atletas apresentavam uma insatisfação com o seu próprio sono, sendo que os distúrbios de sono mais relatados foram: apnéia (14%, refluxo gástrico (15,6%, dor de cabeça (14,1%, ansiedade pós-pesadelo (39,1%, caimbras (20,3%, sonilóquio (26,6%, pânico noturno (9,4%, PLM (9,4% e bruxismo (9,4%. Em relação a avaliação do cronotipo dos atletas, 73,43% se demonstraram indiferentes, 6,22% vespertinos moderados e 20,31% matutinos moderados. Observou-se boa

  5. Trabalho em turnos: estado geral de saúde relacionado ao sono em trabalhadores de enfermagem Trabajo por turnos: estado general de salud relacionado al sueño de trabajadores de enfermería Shift work: overall health state related to sleep in nursing workers

    Directory of Open Access Journals (Sweden)

    Sandra Soares Mendes

    2012-12-01

    Full Text Available O objetivo deste estudo foi identificar os sintomas referentes ao estado geral de saúde associado ao trabalho em turnos de enfermagem e relacioná-los com a qualidade do sono. O estudo foi realizado no Hospital da Irmandade da Santa Casa de Poços de Caldas, Minas Gerais. Participaram 136 profissionais de enfermagem, com média de idade de 33,1 anos, divididos nas seguintes categorias: enfermeiro (8,1%; técnico de enfermagem (80,9%; auxiliar de enfermagem dos turnos diurno e noturno (11%. Os sintomas de saúde foram identificados a partir do Inventário de Estado Geral de Saúde, e a qualidade do sono foi avaliada pelo Diário do Sono. Os dados foram estatisticamente significativos pelo Teste Qui-Quadrado (p=0,021 para a presença do sintoma de flatulência ou distensão abdominal no turno noturno. Constatou-se com a análise de regressão linear múltipla que os sujeitos do turno diurno que apresentaram os sintomas de má digestão (às vezes ou sempre e irritabilidade (sempre tiveram pior qualidade de sono noturno.Se objetivó identificar síntomas referentes al estado general de salud asociado al trabajo por turnos de enfermería y relacionarlos con la calidad del sueño. Realizado en Hospital de la Hermandad de Santa Casa de Poços de Caldas, estado de Minas Gerais. Participaron (n=136 profesionales de enfermería, con media etaria de 33,1 años, divididos en las categorías: enfermero 8,1%, técnico de enfermería 80,9%, auxiliar de enfermería 11,0% de turnos diurno y nocturno. Los síntomas de salud se identificaron mediante Inventario General de Salud y la calidad de sueño se evaluó por Diario del Sueño. Datos estadísticamente significativos según test Chi-Cuadrado (p=0,021 para presencia del síntoma de flatulencia o distensión abdominal en turno nocturno. Mediante análisis de regresión lineal múltiple, los sujetos del turno diurno que presentaban síntomas de mala digestión (eventualmente o siempre e irritabilidad (siempre

  6. Sleep problems and social support: Frailty in a Brazilian Elderly Multicenter Study Problemas de sueño y soporte social: estudio multicéntrico sobre Fragilidad en Ancianos Brasileños Problemas de sono e suporte social: estudo multicêntrico Fragilidade em Idosos Brasileiros

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    Shintia Viana da Costa

    2011-08-01

    ño en general, demorar en adormecer y dormir mal en la noche, presentaron puntajes inferiores a los de ancianos que negaban esos problemas, en la Escala de Percepción de Calidad de Soporte Social. Las estrategias para mejorar la calidad de soporte social podrían contribuir para minimizar los problemas de sueño.Esta pesquisa teve como objetivo identificar relações entre qualidade do suporte social percebido, problemas de sono e hábito de cochilar, em idosos da comunidade. Trata-se de recorte do estudo Fragilidade em Idosos Brasileiros (Fibra, projeto multicêntrico, desenvolvido em 17 cidades brasileiras. Participaram 498 idosos, capazes de responder às entrevistas, sem déficit cognitivo ou funcional grave. Adotou-se, para coleta de dados: questionário sociodemográfico, escala de percepção da qualidade do suporte social, questões sobre problemas de sono (perfil de saúde de Nottingham; questões sobre hábito de cochilar (Minnesota Leisure Activity Questionnaire. Utilizou-se estatística descritiva e teste de Mann-Whitney para tratamento dos dados. Idosos que referiram problemas de sono em geral, demorar para adormecer e dormir mal à noite apresentaram escores inferiores aos dos idosos que negavam esses problemas, na escala de percepção de qualidade de suporte social. Estratégias para melhoria da qualidade de suporte social poderiam contribuir para minimizar problemas de sono.

  7. Diferenças entre o homem e a mulher na apresentação clínica de doentes diagnosticados com síndroma de apneia obstrutiva do sono Differences between men and women in the clinical presentation of patients diagnosed with obstructive sleep apnea syndrome

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    MR Shepertycky

    2006-05-01

    Full Text Available A importância clínica da patologia do sono, particularmente, da síndroma de apneia obstrutiva do sono tem vindo a tornar-se cada vez mais evidente nas últimas décadas. Paralelamente, verificou-se um número crescente de doentes com a confirmação diagnóstica da doença resultante de uma maior sensibilização dos clínicos para esta patologia e consequente maior solicitação de estudos poligráficos do sono. A síndroma de apneia obstrutiva do sono (SAOS é uma doença comum afectando entre 2 a 4% da população adulta de meia-idade. Os doentes com este diagnóstico têm episódios recorrentes de apneias nocturnas seguidas de microdespertares. Está documentado que a SAOS é um factor de risco significativo para o desenvolvimento de outras patologias como sejam hipertensão arterial, arritmias cardíacas, enfarte agudo do miocárdio, acidente vascular cerebral e perturbações cognitivas, caracterizando-se por hipersonolência diurna a que está associado um aumento da frequência de acidentes de viação. Embora esteja bem documentado que o homem tem maior incidência de SAOS que a mulher (4% versus 2%, existe pouca informação sobre as diferenças de apresentação clínica inicial. Pensa-se que esta patologia está subdiagnosticada em mais de 90% das mulheres com SAOS moderada ou grave. Também está demonstrado que pode haver um significativo aumento da mortalidade aos 5 anos na mulher com este diagnóstico. A não valorização de factores únicos no género feminino tem condicionado, por vezes, conclusões inconsistentes e mesmo falsas. O objectivo do presente trabalho foi comparar as diferenças na apresentação clínica da SAOS de acordo com os sexos. Trata-se de um estudo randomizado englobando 130 mulheres com o diagnóstico de SAOS e um grupo controlo de igual número de indivíduos do sexo masculino com a mesma patologia, tendo sido todos submetidos a um registo poligráfico nocturno. A idade média, índice de massa

  8. Episódio depressivo maior, prevalência e impacto sobre qualidade de vida, sono e cognição em octogenários The prevalence of major depression and its impact in the quality of life, sleep patterns and cognitive function in a octogenarian population

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    Flávio MF Xavier

    2001-06-01

    Full Text Available OBJETIVOS: Determinar a prevalência de depressão maior em uma população de sujeitos acima de 80 anos residentes na comunidade, comparar os padrões de sono e a função cognitiva entre controles normais e sujeitos com depressão maior e estimar a freqüência de outros transtornos psiquiátricos entre controles e sujeitos deprimidos. MÉTODOS: De uma população de 219 habitantes com mais de 80 anos, residentes em um município semi-rural no sul do Brasil (município de Veranópolis, RS, selecionou-se uma amostra randômica e representativa de 77 sujeitos (35%. Desse grupo, 5 sujeitos que apresentavam critérios de DSM-IV para depressão maior foram comparados com 50 controles sem diagnóstico de demência, delirium ou qualquer transtorno do humor. Os padrões de sono foram avaliados pelo Índice de Pittsburgh de Qualidade do Sono e por um diário do ciclo sono/vigília completado ao longo de duas semanas. Para a avaliação cognitiva, foram usados 5 testes neuropsicológicos: teste de lembranças seletivas de Buschke-Fuld; teste lista de palavras da bateria do CERAD; teste de fluência verbal; e 2 subtestes da bateria de memória de Wechsler. RESULTADOS: A prevalência de depressão maior foi de 7,5%. Sujeitos com esse diagnóstico, quando comparados a sujeitos do grupo-controle, apresentavam mais freqüentemente comorbidade com transtorno de ansiedade generalizada, usavam mais benzodiazepínicos e tinham uma pior qualidade de vida pela escala "Short-form 36". Os idosos deprimidos, quando comparados aos controles, tinham os mesmos padrões de sono e apresentavam o mesmo desempenho nos testes neuropsicológicos. CONCLUSÃO: Os resultados corroboram o conceito de que episódios depressivos são freqüentes entre idosos com mais de 80 anos, causando impacto sobre a qualidade de vida associada à saúde e cursando comorbidade freqüente com transtorno de ansiedade generalizada. Entre os idosos octogenários residentes na comunidade, a depress

  9. Reacção paradoxal da pressão arterial ao tratamento com pressão positiva na via aérea em doentes com apneia do sono

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    C. Chaves Loureiro

    2011-03-01

    Full Text Available Resumo: Introdução: Doentes com síndrome de Apneia Obstrutiva do Sono (SAOS podem desenvolver hipertensão arterial (HTA sendo a pressão positiva na via aérea (PAP um tratamento eficaz no controlo da pressão arterial (PA. Objectivos: Analisar uma população de doentes com SAOS que desenvolveu aumento inesperado da PA após o uso de PAP e verificar a existência de correlações entre o aumento da PA, quer com os índices de gravidade da SAOS, quer com a adesão ao tratamento com suporte ventilatório nocturno. Métodos: Análise retrospectiva e descritiva de 30 doentes com SAOS e hipertensão previamente controlada, tratados com PAP, em média durante um ano, que desenvolveram um aumento da pressão arterial, definida como aumento de 5 mmHg na Pressão Arterial Sistólica (PAS e/ou Diastólica (PAD, após instituição de terapêutica PAP. Análise correlativa do aumento da PA com os índices de gravidade da SAOS e com a adesão ao tratamento, utilizando o coeficiente de Pearson. Resultados: De 508 doentes consecutivos seguidos no nosso Departamento, tratados com suporte ventilatório nocturno, 30 evoluíram com aumento de PA após o início do tratamento (idade 58 anos (SD 10,8, índice de Apneia-Hipopneia (IAH 46,1 (SD 18,68. Após o uso de PAP, a variação da Pressão Arterial Média (PAM, da PAS e da PAD foi, respectivamente, de 16 mmHg, 20 mmHg e 6 mmHg (SD: 15,0; 25,0; 19,4. Nenhum doente mostrou aumento significativo de Índice de Massa Corporal (IMC. O valor da Escala de Sonolência de Epworth (ESE diminuiu 8,9 pontos (SD 5,48. As variações de PAM, PAS e PAD não se relacionaram com P90/P95, IAH residual, fugas ou adesão a PAP. Conclusões: Neste grupo que desenvolveu um aumento da PA com o uso de PAP não se identificaram características específicas. Não foram encontradas correlações entre os aumentos

  10. Health, sleep and lack of time: relations to domestic and paid work in nurses Saúde, sono e falta de tempo: relações com o trabalho profissional e doméstico em enfermeiras

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    Luciana Fernandes Portela

    2005-10-01

    Full Text Available OBJECTIVE: To assess whether reported morbidity and complaints of lack of time and sleep are associated with the burden of professional work and housework among nurses. METHODS: A cross-sectional exploratory study was carried out among female nurses and nurse assistants (N=206 of a public hospital in Rio de Janeiro, Brazil. Data were collected by means of a questionnaire. The prevalence ratio and 95% confidence intervals were estimated. RESULTS: Mean duration of professional work and housework time was 40.4 and 31.6 hours/week, respectively. Long professional working time (over 44 hours/week were associated with mild emotional disorders (PR=1.37; 95% CI: 1.05-1.80, complaints of lack of time for resting/leisure (PR=1.61; 95% CI: 1.31-1.97, housework (PR=1.48; 95% CI: 1.12-1.97, and childcare (PR=1.99; 95% CI: 1.51-2.63. Long housework time (over 28 hours/week was associated with lower prevalence of lack of time for childcare (PR=0.62; 95% CI: 0.46-0.84. High housework load was associated with lack of personal time and complaints of varicose veins (PR=1.31; 95% CI: 1.14-1.50 and PR=1.31; 95% CI: 1.08-1.58, respectively. Complaints of varicose veins were also frequent among female nurses with a total work load above 84 hours (PR=1.30; 95% CI: 1.05-1.61, though this group has shown a lower prevalence of arterial hypertension and recurrent headaches (PR=0.35; 95% CI: 0.15-0.83 and PR=0.53; 95% CI: 0.32-0.89, respectively. CONCLUSIONS: Results suggest that both professional and home environments are relevant in the evaluation of work overload on nurses' health and their family and social life. It is stressed the need for instruments for analyzing total workload among female populations.OBJETIVO: Avaliar a associação entre a carga de trabalho profissional e doméstico com doenças e queixas sobre o sono e falta de tempo em enfermeiras. MÉTODOS: Estudo exploratório transversal com profissionais de enfermagem do sexo feminino (N=206 de um hospital p

  11. O plantão noturno em anestesia reduz a latência ao sono El plantón nocturno en anestesia reduce la latencia al sueño Short sleep latency in residents after a period on duty in anesthesia

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    Lígia Andrade da Silva Telles Mathias

    2004-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Os médicos em geral, os anestesiologistas em particular, têm jornadas de trabalho prolongadas. Os residentes de Anestesiologia podem apresentar fadiga e estresse significativos. O objetivo deste trabalho foi verificar, em residentes de primeiro e segundo anos a latência do sono em períodos após plantão. MÉTODO: Foram avaliados 11 residentes em situações distintas: às 7 horas da manhã, após noite de sono normal (> 7h, sem plantão nos 3 dias anteriores (M1; às 7 horas da manhã, após 24 horas de trabalho, sem dormir, sem plantão nos 3 dias anteriores (M2; às 13 horas da tarde, após 30 horas de trabalho, sem dormir, sem plantão nos 3 dias anteriores (M3. Em todas essas situações foi realizado eletroencefalograma (EEG contínuo, em sala apropriada para registro dos sinais de sono, avaliando a latência ao sono (LS. RESULTADOS: Verificou-se redução significativa da LS entre os residentes, após 24 ou 30 horas de plantão sem dormir. Entre os residentes que tiveram noite de sono normal na véspera do exame, 36,4% apresentaram LS em nível considerado patológico. CONCLUSÕES: A jornada de plantão de 24 ou 30 horas leva a valores de LS menores que 5 minutos, considerados patológicos, refletindo a fadiga extrema de residentes de Anestesiologia. Pode ser importante a regulamentação do número de horas de descanso pós-plantão.JUSTIFICATIVA Y OBJETIVOS: Los médicos en general, los anestesiologistas en particular, tienen jornadas de trabajo prolongadas. Los practicantes de Anestesiologia pueden presentar fatiga y estrés significativos. El objetivo de este trabajo fue verificar, en practicantes (estudiantes de primero y segundo años la latencia del sueño en períodos después del plantón. MÉTODO: Fueron evaluados 11 residentes en situaciones distintas: a las 7 horas de la mañana, después de una noche de sueño normal (> 7h, sin plantón en los 3 días anteriores (M1; a las 7 horas de la ma

  12. WHOQOL-OLD assessment of quality of life in elderly patients with Parkinson's disease: influence of sleep and depressive symptoms Qualidade de vida (WHOQOL-OLD em idosos com doença de Parkinson: influência de sintomas do sono e depressivos

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    Regina Margis

    2010-06-01

    Full Text Available OBJECTIVE: Parkinson's disease is a neurodegenerative disease with a number of motor and non-motor features that can affect quality of life. In this study, we aimed to assess quality of life, as well as to evaluate the potential determinants of quality of life, such as sleep quality, motor and depressive symptoms, in elderly patients with Parkinson's disease. METHOD: This was a cross-sectional study in which we applied the World Health Organization Quality of Life Assessment for Older Adults in 57 Parkinson's disease patients over 60 years of age. RESULTS: Total World Health Organization Quality of Life Assessment for Older Adults score was found to be associated with Parkinson's disease severity (rs = -0.43; p OBJETIVO: A doença de Parkinson é uma enfermidade neurodegenerativa com diversas manifestações motoras e não-motoras que podem provocar impacto na qualidade de vida. Este estudo teve como objetivo avaliar a qualidade de vida em pacientes com doença de Parkinson com idade superior a 60 anos por meio do questionário World Health Organization Quality of Life Assessment for Older Adults e possíveis fatores determinantes, tais como qualidade de sono, sintomas motores e depressivos. MÉTODO: Foi realizado estudo transversal avaliando a qualidade de vida pelo questionário World Health Organization Quality of Life Assessment for Older Adults em 57 pacientes com doença de Parkinson. RESULTADOS: World Health Organization Quality of Life Assessment for Older Adults total apresentou associação com a severidade da doença de Parkinson (r s= -0,43; p < 0,001. As facetas de habilidade sensorial e de participação social apresentaram maior pontuação nos indivíduos com estágio leve em comparação ao grupo com doença de Parkinson avançada. World Health Organization Quality of Life Assessment for Older Adults (faceta-I apresentou associação com Índice de Qualidade de Sono de Pittsburg e Escala de Sono na Doença de Parkinson (r p= -0

  13. Estudo sobre o impacto do uso de aparelho de emissão de pressão positiva contínua nas vias aéreas superiores na hipersonia diurna em portadores da síndroma de apneia do sono

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    Clélia Maria Ribeiro Franco

    2009-03-01

    Full Text Available Resumo: Introdução: A síndroma da apneia-hipopneia obstrutiva do sono (SAHOS é um distúrbio respiratório de elevada morbimortalidade. A terapia com pressão positiva contínua das vias aéreas (CPAP representa o tratamento conservador mais prescrito para a SAHOS e tem o intuito de restabelecer a patência das vias aéreas, normalizando o índice de eventos respiratórios obstrutivos, corrigindo os sintomas.Objectivo: Avaliar o impacto do uso do CPAP nasal sobre a hipersonia diurna em portadores de SAHOS.Método: Amostra de vinte doentes portadores de SAHOS diagnosticados por estudo de polissonografia de noite inteira, usuários ou não de CPAP nasal, todos avaliados quanto à hipersonia diurna através da escala de sonolência de Epworth.Resultados: O decréscimo do nível de sonolência diurna dos usuários de CPAP nasal foi significante (p=0,017, enquanto para não usuários de CPAP nasal a média do mesmo diminuiu sem significância estatística (p=0,162. Quanto à adesão à terapia com CPAP, 100% dos usuários relataram benefícios e, destes, 50% referiram desconfortos durante o uso.Conclusões: Portadores de SAHOS usuários do CPAP nasal têm o seu nível de hipersonia diurna diminuído em relação àqueles que não o utilizam.Rev Port Pneumol 2009; XV (2: 215-226 Abstract: Background: Obstructive sleep apnoea-hypopnoea syndrome (OSAHS is a respiratory disorder with high morbidity and mortality. Continuous positive airway pressure (CPAP is the most commonly prescribed conservative treatment for adults with OSAHS. CPAP therapy normalises or decreases OSAHS symptoms and can reduce and prevent OSAHS complications.Aims: To evaluate adherence to nasal CPAP treatment and CPAP impact on daytime drowsiness.Method: A sample of 20 patients evaluated for daytime drowsiness using the Epworth sleepiness scale and interviewed for adherence to nasal CPAP use

  14. Continuous spike-waves during slow waves sleep: a clinical and electroencephalografic study in fifteen children Ponta-onda contínua do sono lento: estudo clínico e eletrencefalográfico em quinze crianças

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    ADRIANA A. F. DJABRAIAN

    1999-09-01

    Full Text Available We report on the clinical and EEG features of 15 patients with the syndrome of "continuous spike waves during slow wave sleep" (CSWSS. The differential diagnosis of CSWSS includes benign epilepsy of childhood with centro-temporal spikes, and Landau-Kleffner and Lennox-Gastaut syndromes. We found normal CT and MRI features in 6 cases, periventricular leukomalacia with and without diffuse brain atrophy in 4 cases and hydrocephalus in 1 case. There was no association between specific neurological findings and CSWSS. Nine of our cases had relatively focal discharges, like some cases from the literature. The occurrence of CSWSS appears to be age-related, generaly between the ages of 5 to 12 years, with a strong temporal relation to the neupsychological deterioration in its nature, severity and prognosis. We believe that this striking disorder has been overlooked and that routine sleep EEG studies on epileptic children may disclose additional cases of CSWSS.Relatamos as características clínicas e eletroencefalográficas de 15 patientes com a síndrome de ponta-onda contínua do sono não-REM (POCSNR. O diagnóstico diferencial da POCSNR inclue a epilepsia benigna da infância com pontas centro-temporais e as síndromes de Landau-Kleffner e Lennox-Gastaut. Encontramos TC e RNM de crânio normais em 6 casos, leucomalácia periventricular em 4 e hidrocefalia em 1. Não houve associação de achados neurológicos específicos e a POCSNR. Nove dos nossos casos tinham descargas relativamente focais, como alguns casos da literatura. A ocorrência da POCSNR parece ser idade-dependente, geralmente entre 5 e 12 anos, com forte relação temporal à deteriorização neurocognitiva, em sua natureza, severidade e prognóstico. Acreditamos que esta síndrome tem sido pouco diagnosticada e que a realização rotineira de EEG em sono em crianças epilépticas possa revelar novos casos de POCSNR.

  15. Estudo comparativo da história clínica e da polissonografia na síndrome da apnéia/ hipopnéia obstrutiva do sono Comparative study between clinical history and polysomnogram in the obstructive sleep apnea/ hypopnea syndrome

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    Lys Maria Allenstein Gondim

    2007-12-01

    Full Text Available O reconhecimento dos distúrbios respiratórios do sono tem aumentado a cada ano. Manifestações, como o ronco, consideradas meros incômodos vêm adquirindo importância no que diz respeito à qualidade de vida e seu impacto social. OBJETIVO: Comparar a história clínica com os resultados da polissonografia (PSG, na Síndrome da Apnéia/Hipopnéia Obstrutiva do Sono (SAHOS, é o principal objetivo deste trabalho. MATERIAL E MÉTODOS: Foi realizado um estudo retrospectivo, com 125 pacientes, através da análise de questionários específicos, IMC e Escala de Epworth. RESULTADOS: Dentre os pacientes, 75 eram do sexo masculino e 50 do feminino. O principal sintoma foi a roncopatia. 46% apresentaram PSG normais, 30% SAHOS leve, 15% moderada e 9% severa, não se evidenciando correlação estatística entre a clínica e a PSG. Dentre as queixas, somente a insônia foi relevante, em análise univariada e em pacientes normais e com SAHOS leve (pRecognizing sleep-disordered breathing is on the rise every year. Manifestations, such as snoring, that were earlier considered mere inconvenients are now acquiring greater importance concerning life quality and social impact. AIM OF THE STUDY: To compare the clinical history to polysomnogram (PSG results in the Obstructive Sleep Apnea/Hypopnea Syndrome (OSAHS. MATERIALS AND METHODS: 125 patients were analyzed, in a retrospective study. Specific questionnaires, avaliations of Body Mass Index and Epworth Scale were carried out. RESULTS: Among the patients, 75 were males and 50 were females. The main symptom was snoring. 46% had normal PSG, 30% had light OSAHS, 15% moderate and 9% severe OSAHS and it was not observed a correlation between clinical data and PSG results. Concerning clinical symptoms, only insomnia has shown relevance when univariably analyzed in normal and light OSAHS patients (p<0,05 compared to patients with moderate and severe OSAHS, losing its importance when analyzed together with other

  16. EEG recording after sleep deprivation in a series of patients with juvenile myoclonic epilepsy Registros eletrencefalográficos após privação de sono em uma série de pacientes com epilepsia mioclônica juvenil

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    Nise Alessandra de Carvalho Sousa

    2005-06-01

    Full Text Available Seizures in Juvenile Myoclonic Epilepsy (JME are dependent on the sleep-wake cycle and precipitant factors, among which sleep deprivation (SD is one of the most important. Still an under diagnosed syndrome, misinterpretation of the EEGs contributes to diagnostic delay. Despite this, a quantitative EEG investigation of SD effects has not been performed. We investigated the effect of SD on EEGs in 41 patients, aged 16-50 yr. (mean 25.4, who had not yet had syndromic diagnosis after a mean delay of 8.2 yr. Two EEG recordings separated by a 48-hour interval were taken at 7 a.m. preceded by a period of 6 hours of sleep (routine EEG and after SD (sleep-deprived EEG. The same protocol was followed and included a rest wakefulness recording, photic stimulation, hyperventilation and a post-hyperventilation period. The EEGs were analyzed as to the effect of SD on the number, duration, morphology, localization and predominance of abnormalities in the different stages. A discharge index (DI was calculated. Out of the 41 patients, 4 presented both normal EEG recordings. In 37 (90.2% there were epileptiform discharges (ED. The number of patients with ED ascended from 26 (70.3% in the routine EEG to 32 (86.5% in the sleep-deprived exam. The presence of generalized spike-wave and multispike-wave increased from 20 (54.1% and 13 (35.1% in the first EEG to 29 (78.4% and 19 (51.4% in the second, respectively (pNa epilepsia mioclônica juvenil (EMJ, uma síndrome epiléptica ainda subdiagnosticada, as crises são dependentes do ciclo vigília-sono e de fatores precipitantes, entre os quais a privação de sono (PS é um dos mais importantes. A interpretação inadequada dos EEGs contribui para atraso no diagnóstico. Ainda não foi realizada investigação quantitativa sobre os efeitos da PS. Avaliamos o efeito da PS nos EEGs de 41 pacientes entre 16 e 50 anos (média 25,4 com EMJ em dois registros eletrencefalográficos, separados por intervalo de 48 horas. Os

  17. Dessaturação noturna: preditores e influência no padrão do sono de pacientes portadores de doença pulmonar obstrutiva crônica com hipoxemia leve em vigília Nocturnal desaturation: predictors and the effect on sleep patterns in patients with chronic obstructive pulmonary disease and concomitant mild daytime hypoxemia

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    Renata Claudia Zanchet

    2006-06-01

    Full Text Available OBJETIVO: Verificar o padrão da oximetria noturna em portadores de doença pulmonar obstrutiva crônica sem apnéia do sono e com hipoxemia leve em vigília, identificar prováveis parâmetros diurnos capazes de predizer a dessaturação noturna e verificar sua influência no padrão de sono. MÉTODOS: Avaliaram-se 25 pacientes, divididos em dois grupos: com e sem dessaturação noturna. RESULTADOS: Comparando-se o primeiro grupo (52% com o segundo observou-se: idade, 63 ± 5 versus 63 ± 6 anos; volume expiratório forçado no primeiro segundo, 53 ± 31% versus 56 ± 19% do previsto; relação entre volume expiratório forçado no primeiro segundo e capacidade vital forçada, 49 ± 14% versus 52 ± 10%; pressão parcial de oxigênio no sangue arterial, 68 ± 8mmHg versus 72 ± 68mmHg; saturação arterial de oxigênio, 93 ± 2% versus 94 ± 1%. O grupo com dessaturação noturna apresentou menores valores de saturação arterial de oxigênio diurna e saturação periférica de oxigênio noturna. Não houve diferença no padrão de sono entre os grupos. Houve correlação da relação entre o volume expiratório forçado no primeiro segundo e a capacidade vital forçada, pressão parcial de oxigênio no sangue arterial e saturação arterial de oxigênio diurnas, e saturação periférica de oxigênio no exercício com os níveis de saturação periférica de oxigênio noturna, porém somente a saturação arterial de oxigênio diurna foi preditora da dessaturação noturna. CONCLUSÃO: A única variável capaz de predizer dessaturação noturna foi a saturação arterial de oxigênio diurna. A dessaturação noturna não influencia o padrão de sono de portadores de doença pulmonar obstrutiva crônica com hipoxemia diurna leve.OBJECTIVE: To determine the nocturnal oximetry pattern in chronic obstructive pulmonary disease patients having no sleep apnea and presenting mild daytime hypoxemia, to identify probable daytime parameters capable of

  18. Contrast ultrasound using SonoVue for pelvic radiation with concurrent chemotherapy monitoring in stage I B-II cervical cancer; Apport de l'echographie Doppler avec injection de contraste pour la prise en charge des cancers du col de l'uterus de stades IB et II par chimioradiotherapie concomitante

    Energy Technology Data Exchange (ETDEWEB)

    Marret, H. [Hopital Bretonneau, Service de Gynecologie, 37 - Tours (France); Barillot, I. [Hopital Bretonneau, Service de Radiotherapie, 37 - Tours (France); Rolland, Y. [CRLCC Eugene-Marquis, 35 - Rennes (France); Leveque, J. [Hopital Anne-de-Bretagne, 35 - Rennes (France)

    2009-10-15

    The aim of the present study was to evaluate whether angiogenic parameters as assessed by trans vaginal color Doppler ultrasound and by enhanced cervix ultrasound may predict prognostic factors of stage I B greater than 4 cm and II cervical cancer treated by radio chemotherapy. A total of 40 patients with histologically proven advanced stage invasive cervical cancer will be evaluated by color Doppler, contrast ultrasound, and MRI before radiotherapy, after the second chemotherapy cycle and prior to surgery. Subjective assessment of the amount of vessels within the tumor (scanty-moderate or abundant) and resistance index (R.I.) will be recorded for Doppler, enhancement and washout period will be studied after injection of SonoVue for contrast ultrasound. All patients will have radical hysterectomy and pelvic lymph node dissection. Comparison with MRI results will be done. The main parameter studied will be persistence of tumor cells in the analysis of the radical hysterectomy. We expected to correlate contrast parameters with persistent disease in order to confirm ultrasound parameters that will be useful to monitor radio chemotherapy and to predict therapeutic answer of such treatment. (authors)

  19. Análise das funções cognitivas e sono na equipe de enfermagem nos turnos diurno e noturno Análisis de la función cognitiva y el sueño en el equipo de enfermería en los turnos de el día y nocturno Analysis of cognitive function and sleep of nursing staff on different shift work

    Directory of Open Access Journals (Sweden)

    Beatriz de Oliveira

    2013-03-01

    Full Text Available Este estudo teve como objetivo analisar a memória de curto prazo, a atenção e o padrão do sono na equipe de enfermagem nos turnos diurno e noturno. Participaram 109 sujeitos de uma instituição hospitalar de Minas Gerais, distribuídos nos turnos: diurno (n= 68 e noturno (n=41. Utilizou-se, para coleta de dados: Diário de sono e Testes da Bateria WAIS III. Os resultados para a medida da qualidade do sono dos sujeitos do turno noturno apresentou diferença significativa (pEste estudio tuvo como objetivo analizar los estándares de memoria a corto plazo, la atención y su sueño personal de enfermería en los turnos. Los participantes del estudio fueron 109 pacientes de un hospital, en Minas Gerais, distribuidos en el turno de día (n = 68 y turno de noche (n = 41. La recolección de datos se realizó a través del diario del sueño y de la batería de prueba WAIS III. Los resultados muestran que existe una diferencia significativa en la calidad del sueño del trabajo en turnos de noche (p The aim of this study was to analyze short-term memory, attention and sleep patterns of the nursing staff working night and day shifts. Study participants were 109 subjects in a hospital in Minas Gerais working on the day shift (n = 68 or night shift (n = 41. Data collection was performed using the Sleep Diary and WAIS-III Test Battery. The results showed a significant difference for the quality of sleep of those on night shift work (p <0.0001; ANOVA. The subjects on the day shifts performed better on the Digit Symbol with a significant difference (p = 0.0008; Mann-Whitney test. In conclusion, the quality of sleep of the group on the night shift showed lower averages compared with those on the day shifts, although they had greater total sleep. The level of attention showed to be best for the group on the day shift work.

  20. Sono, qualidade de vida e acidentes em caminhoneiros brasileiros e portugueses Sueño, la calidad de vida y accidentes en brasileños y portugueses conductores de camiones Sleep, quality of life and accidents in the lives of Brazilian and Portuguese truck drivers

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    José Carlos Souza

    2008-09-01

    Full Text Available Avaliaram-se os distúrbios do sono, trabalho em turnos, sonolência excessiva diurna (SDE e qualidade de vida (QV de 206 caminhoneiros brasileiros e 200 portugueses. Aplicaram-se a Escala de Sonolência de Epworth, o SF-36 e o PSQI. Os portugueses dormem mais nos dias de trabalho (pSe evaluaron disturbios del sueño, trabajo en turnos, somnolencia diurna excesiva (SDE y calidad de vida (CV, de 206 camioneros brasileños y 200 portugueses. Se aplicaron la Escala de Somnolencia de Epworth, SF-36 y PSQI. Los portugueses duermen más los días de trabajo (pSleep disorders, shift work, excessive daytime sleepiness (EDS and quality of life (QL were evaluated by Epworth sleepiness scale, SF-36 and PSQI in 206 Brazilian and 200 Portuguese truck drivers. Portuguese drivers sleep more on working days (p<0.0001 and on non-working days (p=0.0720 and do more shift work (37.50%, whereas Brazilian drivers wake up earlier on working days (p<0.0001 and on non-working days (p<0.0001. Sleep disorders affected 35.40% of Brazilian drivers and 21.50% of Portuguese drivers (p=0.0019, whereas 32.00% and 21.00% had respectively EDS (p=0.0015. Brazilian truck drivers drive over 16 hours a day (43.20% and use more amphetamines (11.10% (p<0.0001, while Portuguese drivers consume more alcohol (73.50% (p<0.0001. QL scores were better for Portuguese drivers regarding mental health (p<0.0001 and pain (p<0.0001 and better for Brazilian drivers regarding physical function (p<0.0001, vitality (p=0.0002 and social function (p<0.0001. Sleep disorders are highly prevalent in both countries.

  1. Sleep characteristics in children in the isolated rural African-Brazilian descendant community of Furnas do Dionísio, State of Mato Grosso do Sul, Brazil Características do sono da criança na comunidade negra rural isolada de Furnas do Dionísio no Mato Grosso do Sul

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    RUBENS REIMÃO

    1999-09-01

    Full Text Available Developmental and cultural factors affect sleep habits in childhood. The objective of this research was to determine sleep habits of children in the isolated rural African-Brazilian community of Furnas do Dionísio, Mato Grosso do Sul, Brazil. The members of this community are closely related descendants of the ex-slave Dionísio, and remained in relative geographical isolation for about a century. Sleep characteristics of 55 children (35M; 20F, 2 to 10 year olds, were evaluated in interviews with their mothers. The results showed that cosleeping, in the same bed with family members, was present in 80.0% of the 2-3 year olds; decreasing to 25.0% of the 8-10 year olds. Only 5.4% of the children slept alone in their own bedroom. Mean number of persons per bedroom was 2.8. Only 7.0% of the bedrooms had TV; 98.1% slept in silence. The data obtained support the need to weigh cultural factors influence on sleep.Hábitos de dormir da criança sofrem influências fisiológicas e culturais. O objetivo desta pesquisa foi verificar os hábitos de dormir da criança da comunidade negra rural e isolada de Furnas do Dionísio, no Mato Grosso do Sul. A comunidade é composta dos membros de uma mesma família, descendentes do ex-escravo Dionísio, mantida por cerca de um século em isolamento geográfico relativo. As características de 55 crianças (35 M; 20 F, de 2 a 10 anos de idade, foram pesquisadas através de entrevistas com as mães. Resultou que o hábito de dormir junto (cosleeping estava presente em 80,0 % aos 2-3 anos; reduzindo a 25,0 % aos 8-10 anos. Apenas 5,4% dormiam sozinhas em seu quarto. A média de pessoas por quarto foi 2,8. Apenas 7,0 % dos quartos tinham televisão; 98,1% eram silenciosos. Os resultados apóiam a necessidade de determinar a influência de fatores étnicos no sono.

  2. Agglomeration and reaction characteristics of various coal chars in fluidized-bed coal gasifier; Ryudoso sekitan gas ka ronai deno sekitan no gyoshu tokusei to hanno tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Uemiya, S.; Aoki, K.; Mori, S.; Kojima, T. [Seikei University, Tokyo (Japan). Faculty of Engineering

    1996-10-28

    With relation to the coals delivered as common samples in the coal fundamental technology development project, an experimental study was conducted on agglomeration characteristics and reaction characteristics in the fluidized-bed coal gasifier. For the experiment, used was a fluidized bed gasifier inserted with a cone-shape dispersion plate with a nozzle in the center. After raising the temperature of the gasifier up to 773K, gasification was conducted sending to the gasifier air from the nozzle and steam from the dispersion plate. The mean particle diameter and gas concentration of chars were measured till the temperature reaches 1373K. As a result of the experiment, it was confirmed that the carbon conversion ratio increases with a decrease in coalification degree of the coal. Moreover, influence of the coal kind was markedly observed at the grid zone of the lower part of the bed, and it was clarified that the lower carbon content ratio the coal kind has, the faster the speed of CO formation and water gasification get. The agglomeration temperature of charcoal which is a product of the condensate is lower by as many as several hundred K than the point of softening, and it was considered to be necessary to study the relation with the temperature distribution in the bed. 3 refs., 3 figs., 1 tab.

  3. Identification of modal parameters and spatial matrix in frequency domain. Basic theory; Shuhasu ryoiki ni okeru mode tokusei to tokusei gyoretsu no dotei. Kiso riron no kento

    Energy Technology Data Exchange (ETDEWEB)

    Iwahara, M [Isuzu Advanced Engineering Center, Ltd., Tokyo (Japan); Sugiura, T; Takaiwa, H; Nagamatsu, A [Tokyo Institute of Technology, Tokyo (Japan)

    1997-10-01

    An approach is presented for the identification of spatial matrix with modal parameters in the frequency domain. Modal parameters are transformed to spatial matrix with constraints of modal vector orthogonality and characteristic equation. Adding the connecting conditions or unconnected conditions of measuring points, spatial matrix is determined by modal parameters whose number is smaller than that of dimension of spatial matrix. 9 refs., 4 figs., 2 tabs.

  4. Character of photovoltaic/thermal hybrid collector. Character analysis by numerical calculation; Taiyoko netsu hybrid collector no tokusei. Suchi keisan ni yoru tokusei kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Morita, Y; Iwawaki, T; Fujisawa, T; Tani, T [Science University of Tokyo, Tokyo (Japan)

    1997-11-25

    In order to investigate characteristics of photovoltaic (PV)/thermal hybrid collectors (PV/T{sub s}) operating under varying conditions, energy equilibrium equations have been developed for numerical calculation, and the calculated results were compared with the observed ones. The calculated characteristics are close to the observed ones, both for photoelectric conversion and heat collecting characteristics, demonstrating validity of these energy equations. It is found, by comparing characteristics of PV/T{sub A} (covered with glass) with those of PV/T{sub B} (not covered with glass), that these characteristics are greatly affected by glass cover. Maximum overall excergy levels attained are 13.29% with PV/T{sub A} and 11.48% with PV/T{sub B} under the conditions of solar radiation intensity H: 800W/m{sup 2}, ambient temperature: 20degC and wind velocity: 0.5m/s, where flow rates of heat medium are 2.0times10{sup -3} and 4.0times10{sup -3}kg/s, respectively. Thus, the PV/T{sub A} system has a higher maximum excergy efficiency than the PV/T{sub B} system. The PV/T{sub A} gives water of higher temperature, demonstrating that covering the system with glass increases maximum excergy efficiency and optimum temperature. 6 refs., 5 figs., 2 tabs.

  5. Avanços recentes do impacto da apneia obstrutiva do sono na hipertensão arterial sistêmica Avances recientes del impacto de la Apnea Obstructiva del Sueño en la Hipertensión Arterial Sistémica Recent advances of the impact of obstructive sleep apnea on systemic hypertension

    Directory of Open Access Journals (Sweden)

    Rodrigo P. Pedrosa

    2011-08-01

    Full Text Available A apneia obstrutiva do sono (AOS é uma condição clínica comum na população em geral, principalmente entre os pacientes portadores de doenças cardiovasculares. Mais do que um fenômeno local de obstrução das vias aéreas superiores, a AOS traz repercussões sistêmicas que podem incluir a hipóxia intermitente, a redução abrupta da pressão intratorácica e a ocorrência de microdespertares com fragmentação do sono. Nas últimas décadas, inúmeras evidências apontam de forma consistente a AOS como um importante fator envolvido na ocorrência de doenças cardiovasculares. Particularmente, a relação entre a AOS e a hipertensão arterial sistêmica (HAS é a que encontra um maior conjunto de evidências. Atualmente, encontram-se dados que consideram a AOS uma importante causa secundária de HAS. Mais do que isso, a AOS está independentemente associada a um pior controle pressórico, alteração do descenso noturno da pressão arterial e à presença de lesões de órgãos-alvo, tais como a hipertrofia do ventrículo esquerdo e a microalbuminúria. Estudos randomizados sugerem que o tratamento da AOS, especialmente com a pressão positiva contínua de vias aéreas superiores (CPAP, considerado o tratamento padrão para a AOS, promove redução significante da pressão arterial nas 24 horas, efeito esse mais significante no subgrupo de pacientes com HAS não controlada e nos pacientes com HAS resistente. A despeito de todas essas evidências, a AOS ainda continua sendo subdiagnosticada. O objetivo desta revisão é discutir os recentes avanços nos mecanismos fisiopatológicos, na apresentação clínica e no tratamento da AOS, e o benefício sobre a pressão arterial.La apnea obstructiva del sueño (AOS es una condición clínica común en la población en general, principalmente entre los pacientes portadores de enfermedades cardiovasculares. Más que un fenómeno local de obstrucción de las vías aéreas superiores, la AOS trae

  6. Impacto da umidificação aquecida com pressão positiva automática em vias aéreas na terapia do síndroma de apneia obstrutiva do sono Impact of heated humidification with automatic positive airway pressure in obstructive sleep apnea therapy

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    Sara Moreira da Silva Trindade Salgado

    2008-09-01

    Full Text Available OBJETIVO: Avaliar o impacto da umidificação aquecida introduzida no início da terapia com pressão positiva automática em vias aéreas (APAP, do inglês automatic positive airway pressure na adesão e efeitos secundários. MÉTODOS: Foram randomizados 39 doentes com síndroma de apneia obstrutiva do sono sem terapia prévia em dois grupos de tratamento com APAP: com umidificação aquecida (grupo APAPcom; e sem umidificação (grupo APAPsem. Os doentes foram avaliados 7 e 30 dias após a colocação de APAP. Os parâmetros analisados foram a adesão ao tratamento (número médio de horas/noite, efeitos secundários (secura nasal ou da boca, obstrução nasal e rinorreia, sonolência diurna (escore da escala de sonolência de Epworth e o conforto subjectivo (escala visual analógica. Foram ainda avaliados o índice de apneia-hipopneia (IAH residual, pressões e fugas médias registados nos ventiladores. RESULTADOS: Os dois grupos de doentes estudados eram semelhantes no que respeita à média etária (APAPcom: 57,4 ± 9,2; APAPsem: 56,5 ± 10,7 anos, IAH (APAPcom: 28,1 ± 14,0; APAPsem: 28,8 ± 20,5 eventos/hora de sono, Epworth basal (APAPcom: 11,2 ± 5,8; APAPsem: 11,9 ± 6,3 e sintomas nasais iniciais. A adesão foi semelhante nos dois grupos (APAPcom: 5,3 ± 2,4; APAPsem: 5,2 ± 2,3 horas/noite. Não se verificaram diferenças nos outros parâmetros avaliados. CONCLUSÕES: A introdução inicial da umidificação aquecida na terapia com APAP não demonstrou vantagem no que diz respeito à adesão e efeitos secundários.OBJECTIVE: To study the impact that heated humidification instituted in the beginning of automatic positive airway pressure (APAP therapy has on compliance with and the side effects of the treatment. METHODS: Thirty-nine treatment-naïve patients with obstructive sleep apnea were randomized into two groups to receive APAP using one of two modalities: with heated humidification (APAPwith group; and without heated

  7. Practical applications of superconducting technology; Chodendo gijutsu to sono oyo

    Energy Technology Data Exchange (ETDEWEB)

    Hoshino, M.; Yamamoto, K.; Urata, M. [Toshiba Corp., Tokyo (Japan)

    1995-11-01

    Remarkable progress has been made in superconducting technology recently. This paper describes the details and technical features of every cooling type of practical superconducting magnet (SCM), including the SCM for magnetic resonance imaging (MRI), SCM for semiconductor pulling devices, high-field SCM, SCM for magnetically confined plasma devices, and SCM for particle detectors. Commercial production of pool-boil-cooled SCMs has been realized by reducing helium evaporation and decreasing the frequency of helium pouring. The development of forced-cooled SCMs has made it possible to build large SCMs. Moreover, the development of the 4 K-GM refrigerator has enabled liquid-helium-free SCMs to be introduced. Since this type of SCM can be operated merely by turning on a switch, SCMs are expected to come into more widespread use. 7 refs., 1 fig.

  8. Tatara steelmaking and its metallurgy; Tatara seitetsu to sono kinzokugaku

    Energy Technology Data Exchange (ETDEWEB)

    Kiyonaga, K. [Hitachi Metal Technox Ltd., Tokyo (Japan)

    1994-12-20

    A Japanese traditional steel making method is called `Tatara steel making.` Tatara steel making is a unique steel making method which was developed in Japan, and it is said that real Japanese swords can be produced only from Japanese steel and iron produced through Tatara steel making. Although the origin of Tatara steel making is still not clear, it has been considered that its progenitorial from appeared from the latter half of the middle part to the beginning of the latter part of the Tumulus period, i.e., before or after the sixth century. Thereafter, with many improvements thereof, the method had been progressed, and it is regarded that the current from of Tatara steel making was completed in the latter half of the seventeenth century. The modern Tatara steel making was developed in mountain areas in the Chugoku District, which region supplied most of the domestic iron demands until western style iron was introduced into Japan. There is a trace that iron rock was used for steel making at the initial stage of Tatara steel making, but thereafter the method took a shift to iron sand refining in most cases. This report describes the origin and summary of Tatara steel making. In particular, it describes the operating method, quality and furnace reactions of Tatara steel making from the metallurgical point of view. 26 refs., 3 figs., 6 tabs.

  9. Tubular bioreactor and its application; Tubular bioreactor to sono tekiyo

    Energy Technology Data Exchange (ETDEWEB)

    Endo, I.; Nagamune, T. [The University of Tokyo, Tokyo (Japan). Faculty of Engineering; Yuki, K. [Nikka Whisky Distilling Co. Ltd. Tokyo (Japan); Inaba, H. [Sumitomo Heavy Industries, Ltd., Tokyo (Japan)

    1994-09-05

    The loop type tubular bioreactor (TBR) was developed where biocatalysts are trapped in the reactor by membrane module. A UF membrane or MF membrane and crossflow filtration were adopted for the membrane module, and the reactor loop was composed of four membrane modules. The reactor was operated at 2-4 m/s in membrane surface velocity and 300-400 kPa in filtration pressure. As the result of the high-density culture of lactic acid bacteria and yeast, a biomass concentration was more than 10 times that in batch culture, suggesting the remarkable enhancement of a production efficiency. As the result of the continuous fermentation of cider, the fast fermentation more than 60 times that in conventional ones was obtained together with the same quality as conventional ones. Such a fast fermentation was probably achieved by yeast suspended in the fermenter of TBR, by yeast hardly affected physico-chemically as compared with immobilized reactors, and by small effect of mass transfer on reaction systems. 4 refs., 6 figs.

  10. Avaliação da escala de Epworth em pacientes com a Síndrome da apnéia e hipopnéia obstrutiva do sono Evaluation of Epworth Sleepiness Scale in patients with obstructive sleep apnea-hypopnea syndrome

    Directory of Open Access Journals (Sweden)

    Letícia Boari

    2004-12-01

    Full Text Available A síndrome da apnéia e hipopnéia obstrutiva do sono (SAHOS é, atualmente, considerada um problema de saúde pública por causar aumento da morbi-mortalidade cardiovascular e acidentes de trânsito. A polissonografia assistida é o padrão-ouro para o diagnóstico e acompanhamento destes pacientes. No entanto, por ser onerosa, demorada e de acesso restrito, outros métodos tem sido desenvolvidos. A escala de sonolência de Epworth (ESE é uma avaliação subjetiva, porém, rápida, sem custos e simples de ser aplicada. OBJETIVO: Avaliar a correlação entre a pontuação da ESE e o índice de apnéia e hipopnéia (IAH da polissonografia de pacientes com SAHOS. FORMA DE ESTUDO: Clínico retrospectivo. MATERIAL E MÉTODO: Revisão de prontuário de 66 pacientes com queixa de roncopatia que foram submetidos a procedimento cirúrgico (uvulopalatofaringoplastia com ou sem abordagem nasal. Avaliaram-se a pontuação da ESE e o IAH da polissonografia pré e pós-operatórios. RESULTADOS: 78,7% pacientes com grau normal de IAH tiveram pontuação de ESE menor do que 10 e 65% pacientes com grau severo de IAH tiveram pontuação maior do que 10. Não houve resultados estatisticamente significantes para os grupos moderado e leve. CONCLUSÃO: A escala de Epworth pode distinguir os graus normais e severos sem, no entanto, determinar os graus moderado e leve. Assim, pode ser utilizada para acompanhamento de pacientes com SAHOS sem, no entanto, substituir a polissonografia uma vez que não consegue avaliar todos os graus de severidade.Today obstructive sleep apnea–hypopnea syndrome (OSAHS is a public health issue, since it increases cardiovascular morbidity-mortality rate and the risk of car crashes. Overnight polysomnography is the gold standard for diagnosis and follow-up of affected patients. However, because the test is expensive, time-consuming and of difficult access, others methods have been proposed. Although the Epworth Sleepiness Scale (ESS is

  11. Avaliação clínica e polissonográfica do aparelho BRD no tratamento da Síndrome da Apneia Obstrutiva do Sono Clinical and polysomnographic assessment of Obstructive Sleep Apnea Syndrome treatment with BRD appliance

    Directory of Open Access Journals (Sweden)

    Cibele Dal-Fabbro

    2010-02-01

    Full Text Available OBJETIVOS: este trabalho de pesquisa teve o intuito de realizar uma avaliação clínica e polissonográfica do efeito de um aparelho intraoral (AIO para tratamento da Síndrome da Apneia Obstrutiva do Sono (SAOS, desenvolvido e testado por duas universidades federais brasileiras. MÉTODOS: a amostra constou de 50 pacientes (idades entre 18 e 65 anos, sendo 33 homens e 17 mulheres com diagnóstico polissonográfico inicial de SAOS de grau leve e moderado. Todos os pacientes submeteram-se a uma nova avaliação polissonográfica de noite inteira (em uso do AIO aproximadamente 6 meses após a primeira avaliação. Baseado na diminuição dos eventos respiratórios obstrutivos, obtida com o uso do AIO, os pacientes foram então divididos em bons respondedores (redução de 50% ou mais no índice de apneia e hipopneia (IAH, permanecendo abaixo de 10 eventos/hora e maus respondedores (IAH permanecendo maior ou igual a 10 eventos/hora. RESULTADOS E CONCLUSÕES: em 54% da amostra o IAH diminuiu para menos de cinco eventos/hora com o uso do AIO; em 38% a redução do IAH foi maior do que 50%, mas permaneceu acima de cinco eventos/hora; e em 6% da amostra o IAH reduziu menos que 50%. Os bons respondedores corresponderam a 86% da amostra estudada, enquanto os maus respondedores a 14%. Houve melhora significativa na escala de sonolência, no IAH, nos microdespertares e na saturação mínima de oxihemoglobina com a terapia utilizada. O Índice de Massa Corpórea elevado parece interferir desfavoravelmente no desempenho do aparelho em estudo.OBJECTIVES: The current investigation aimed to carry out a clinical and polysomnographic assessment of treatment of Obstructive Sleep Apnea Syndrome (OSAS with an oral appliance (OA developed and tested by two Brazilian federal universities. METHODOLOGY: The sample was composed of 50 patients (aged between 18 and 65 years, 33 men and 17 women with initial polysomnographic diagnosis of light to moderate OSAS. All

  12. Comparação dos instrumentos de avaliação do sono, cognição e função no acidente vascular encefálico com a classificação internacional de funcionalidade, incapacidade e saúde (CIF Comparison of instruments for sleep, cognition and function evaluation in stroke patients according to the international classification of functioning, disability and health (ICF

    Directory of Open Access Journals (Sweden)

    Tania F. Campos

    2012-02-01

    Full Text Available CONTEXTUALIZAÇÃO: A Classificação Internacional de Funcionalidade, Incapacidade e Saúde (CIF precisa ser empregada amplamente na pesquisa e prática clínica, mas há escassez de trabalhos que vinculem sua utilização a instrumentos de avaliação utilizados na fisioterapia. OBJETIVO: Comparar os instrumentos de avaliação do sono, cognição e função com a CIF em pacientes com AVE. MÉTODOS: Participaram 12 pacientes (seis mulheres, com idade média de 55,4 (±6,2 anos e tempo de recuperação de sete a 36 meses. Os pacientes foram avaliados pelo Índice de Qualidade do Sono de Pittsburgh (IQSP, Miniexame do Estado Mental (MEEM e Índice de Barthel (IB. A comparação da frequência das categorias registradas da CIF com os itens dos instrumentos foi realizada por meio do teste de Fisher e teste do qui-quadrado. A concordância das categorias registradas por dois avaliadores foi analisada pelo Índice de Kappa. RESULTADOS: Na análise do IQSP, encontrou-se um escore médio de 5,0 (±3,0; para o MEEM, de 22,5 (±3,4 e para o IB, de 74,6 (±17,2. Na CIF, as alterações identificadas nos instrumentos anteriores foram registradas em 46 categorias, sendo a maior parte no componente "Funções do Corpo", seguido de "Atividades e Participação". Encontrou-se uma concordância interavaliador de 0,87 para o IQSP (substancial, de 0,44 para o MEEM (moderada e de 0,39 para o IB (justa. CONCLUSÕES: Os resultados indicam que as concordâncias de cada instrumento foram muito diferentes, sugerindo a necessidade de maior utilização desses instrumentos na prática fisioterapêutica, a fim de otimizar a formulação e padronização do diagnóstico fisioterapêutico.BACKGROUND: The International Classification of Functioning, Disability and Health (ICF should be widely used in research and clinical practice, but there are few studies that do so with the evaluation instruments used in physical therapy. OBJECTIVE: To compare instruments that evaluate

  13. Static characteristics of a pilot relief valve; Baransupisuton gata ririfu ben no sei tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Washio, S.; Yonguang YU; Nakamura, Y. [Okayama Univ. (Japan). School of Engineering

    1997-09-25

    Among a lot of hydraulic valves, relief valve is the most fundamental and important valve which takes change of pressure control. It is essential to know the working characteristics accurately, in order to predict the performance of . system. So far, the numerical simulation of relief valve has been tried and the mathematical models of individual component characteristics based on the knowledge of hydraulics are proposed. In this report, it was revealed that the static relation among the pressure drop, flow rate and opening area for a constriction can be represented, not by the traditional hydraulic orifice equation which has always been used for the purpose but by a new one including an additional pressure loss proportional to the flow rate and the fluid viscosity and inversely proportional to the square of the opening area. The new characteristic equation has proved to consistently forecast the experimental findings in which the rise in oil temperature results in an increase in the piston displacement, but causes little changes as regards regulated pressure. It has also turned out that contrary to conventional preconception, the fluid force exerted on a poppet is negligible. 6 refs., 14 figs., 1 tab.

  14. Evaluation for membrane components of water recycling system. Mizu saisei junkan system yoso no tokusei hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Tanemura, T; Otsubo, K; Oguchi, M [National Aerospace Laboratory, Tokyo (Japan); Ashida, A; Hamano, N; Mitani, K [Hitachi, Ltd., Tokyo (Japan)

    1992-04-01

    The configuration of water recycling systems with membrane filters was studied to purify waste water discharged from human beings, animals and plants which is a key subsystem for closed ecological life support systems (CELSS) essential to long-term manned space activity. The filter performance test apparatus with three kinds of filters such as pre-filter, reverse osmosis membrane filter and ultra membrane filter was fabricated to conduct long-term cycling high-concentration tests using artificial urine as original waste water. As a result, since every membrane filter offered their nominal performance incompletely in high-concentration tests, it was necessary to add an NaCl removing apparatus to the system as primary treated water should be used for vegetation. It was also required to test the membrane performance preliminarily because the performance such as membrane life was different between various waste waters. 7 refs., 32 figs., 9 tabs.

  15. Sorption phenomena of methanol on heat treated coal; Netsushori wo hodokoshita sekitan no methanol kyuchaku tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Yasuda, H.; Kaiho, M.; Yamada, O.; Soneda, Y.; Kobayashi, M.; Makino, M. [National Institute for Resources and Environment, Tsukuba (Japan)

    1996-10-28

    Experiments were carried out to learn methanol sorption characteristics of heat-treated coal. When Taiheiyo coal is heat-treated at 125{degree}C, performed with a first methanol adsorption at 25{degree}C, and then desorption at 25{degree}C, a site with strong interaction with methanol and a site with relatively weak interaction are generated in test samples. A small amount of methanol remains in both sites. Then, when the methanol is desorbed at as low temperature as 70{degree}C, the methanol in the site with strong interaction remains as it has existed therein, but the methanol in the site with relatively weak interaction desorbs partially, hence the adsorption amount in a second adsorption at 25{degree}C increases. However, when desorption is performed at as high temperature as 125{degree}C, the methanol in the site with strong interaction also desorbs, resulting in increased adsorption heat in the second adsorption. The adsorption velocity drops, however. Existence of methanol in a site with strong interaction affects the adsorption velocity, but no effect is given by methanol in a site with weak interaction. 3 refs., 4 figs.

  16. Fundamental combustion characteristics of lean hydrogen mixtures; Suiso kihaku kongoki no kisoteki nensho tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Barat, D; Kido, H; Nakahara, M; Hashimoto, J [Kyushu University, Fukuoka (Japan)

    1997-10-01

    One of the excellent combustion characteristics of hydrogen-air mixture is that its emission is free of CO2, but the problem of NOx remains, mainly caused by the high combustion temperature. Using leaner mixture and carrying out EGR are supposed to be effective methods to reduce NOx. In this study, to examine the effectiveness of the two methods, fundamental combustion characteristics of nitrogen added lean hydrogen mixtures were investigated by chemical equilibrium calculations and measurements of turbulent combustion characteristics. It is suggested that nitrogen added mixtures can achieve lower NOx combustion than lean mixtures, taking the combustion efficiency into consideration. 7 refs., 7 figs., 1 tab.

  17. Rotation loss characteristics of superconducting magnetic bearings; Chodendo jikijikuju no kaiten sonshitsu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Kameno, H.; Miyagawa, Y.; Takahata, R.; Ueyama, H. [Koyo Seiko Co., Ltd., Osaka (Japan)

    1999-11-25

    In order to clarify the rotation loss and levitation force reduction characteristics of two kinds of radial and axial-type superconducting magnetic bearings (SMB) consisting of a ring-shaped YBCO and a permanent magnet composite, we measured rotation losses and levitation forces of each SMB with a new rotation-loss measuring device using active magnetic bearings. The rotation loss of the SMB increased with increased initial load of the SMB. The levitation force of the SMB decreased remarkably just after activating the initial load to the SMB and during acceleration of the rotor suspended by the SMB. The reduction in levitation force was improved by means of applying a pre-load, that means a temporary load, before the initial load against the SMB. But the rotation loss of the SMB was increased as pre-load was increased. When the YBCO was cooled down from 77 to 66 K, the rotation loss of the SMB decreased as the temperature of the SC decreased. (author)

  18. Solar collecting characteristics of regenerative solar air collector; Chikunetsushiki kuki shunetsuki no shunetsu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Aoki, H; Takano, S; Kamitaira, T [Hachinohe Institute of Technology, Aomori (Japan)

    1997-11-25

    In order to develop a solar drying equipment for agricultural and marine products, a regenerative solar air collector was fabricated on a trial basis, which uses round stones as a heat storing material. Its heat collecting characteristics were discussed. The air heat collector was installed on a roof of the Hachinohe Engineering University facing due south. The inside of the air heat collector is lined with heat insulating material with a thickness of 30 mm, and black-painted round stones were laid as an heat insulating material on the floor and the north face. The collector is of a natural air circulating system in which outside air enters from an entrance open to atmosphere, and warmed air exits from upper exit. A selectively absorbing face plaque for accelerating the natural circulation was suspended on the upper part of the north face of the collector. An experiment was performed also on a case in which air is forcibly circulated by fan from the air exit hole. In the natural circulation system, high heat collecting efficiency is shown in the forenoon. However, heat loss increases as temperature in the equipment rises, and heat stored in the round stones during daytime was dissipated completely in the afternoon to night. In the case of the forced circulation system, heat collecting efficiency as high as about 90% was shown in sunny days. This is thought because of heat storage buffering action due to storage of heat in and its dissipation from the round stones, and because of suppression of heat dissipation from the glass surface. 1 ref., 9 figs.

  19. Characteristics of microtremors in Hanshin area; Hanshin chiiki ni okeru bido no kihon tokusei nitsuite

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, H; Suzuki, K; Yamanaka, H; Seo, K [Tokyo Institute of Technology, Tokyo (Japan)

    1996-10-01

    To increase general understandings of fundamental characteristics of microtremors in Hanshin area, microtremors have been observed at Sumiyoshi River-side, Rokko Island, and Nishinomiya. Relations were discussed among the stability of predominant period, successive fluctuation and meteorological conditions. For the analysis, cosine-type taper was conducted before and after 10% of the observed records, and Fourier spectrum was calculated by smoothing using Parzen window with a band width 0.3 Hz. Geometrical mean of two components was used as a horizontal component. At the observation points except Sumiyoshi River-side, predominance in the short period side was not distinct, and was not stable due to the successive fluctuation of predominant period. However, there was less successive fluctuation of spectrum ratio between different two points in the band with period more than 1 sec. Since there was a close correlation between the successive fluctuation in this band and the wind velocity or air pressure, the microtremors in this band was affected by a single vibration source. Ground characteristics could be illustrated by the averages of ratio against base points of moving observation. 14 refs.

  20. Water permeabilities of pulverized fuel ash; Bifuntan sekitanbai no tosui tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Ichikawa, T [Center for Coal Utilization, Japan, Tokyo (Japan); Nagataki, S [Niigata University, Niigata (Japan); Hosoda, N [Kumagai Gumi Co. Ltd., Tokyo (Japan); Utsuki, T [The Coal Mining Research Center, Japan, Tokyo (Japan); Kubo, H [Obayashi Corp., Tokyo (Japan)

    1996-09-01

    It is intended to establish a technology to utilize coal ash in bulk to deal with its increasing production. In order to expand its use into earth engineering materials, two kinds of combustion ashes produced from dust coal burning power plants were used for studies using different kinds of tests. The tests were carried out on strength properties, water permeability, and characteristics of dissolving trace amounts of chemical constituents, with regard to addition effects of cement into compacted and slurry-state dust coal burned ashes. The derived findings may be summarized as follows: as the strength properties, the strength for both of the compacted and slurry-state ashes increases as the cement addition ratio is increased; growth of the strength due to the cement addition ratio and material age varies depending on the kinds of dust coal burned ash; comparison of strengths of the compacted and the slurry-state ashes indicates the strength of the latter ash is about one-third to quarter of that of the former ash; water permeability of the ashes decreases both in the compacted and slurry- state ashes as the cement addition ratio is increased; and the cement addition ratio gives greater impact to the water permeability than the density of the ashes. 28 figs., 5 tabs.

  1. Reservoir characterization using artificial neural network; Neural network wo mochiita choryuso tokusei kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Shimada, N; Kozawa, T [Japan National Oil Corp., Tokyo (Japan); Nishikawa, N; Tani, A [Fuji Research Institute Corp., Tokyo (Japan)

    1997-05-27

    Neural network is used for the prediction of porosity and permeability using logging data as reservoir characteristics, and the validity of this method is verified. For the prediction of reservoir characteristics by the use of seismic survey data, composite seismic survey records obtained by density logging and acoustic logging are used to experiment the prediction of porosity and permeability continuous along lines of wells. A 3-output back propagation network is used for analysis. There is a possibility that this technique when optimized will improve on prediction accuracy. Furthermore, in the case of characteristics mapping, 3-dimensional seismic data is applied to a carbonate rock reservoir for predicting spatial porosity and permeability. This technique facilitates the comprehensive analysis of core data, well data, and seismic survey data, enabling the derivation of a high-precision spatial distribution of reservoir characteristics. Efforts will continue for further improvement on prediction accuracy. 6 refs., 7 figs., 3 tabs.

  2. Improvement of superconducting cylindrical linear induction motor; Chodendo entokeitan ichiji rinia yudo mota no tokusei kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Kikuma, T.; Tomita, M.; Ishiyama, A. [Waseda Univ., Tokyo (Japan)

    1999-11-10

    For the purpose of we examining the effect of characteristics and ac loss under real machine operating environment of the alternating current superconductivity winding for a realization of the superconductive AC machine vessel, cylindrical shortness first linear guiding motor which used NbTi/CuNi superconducting cable for the primary winding was produced experimentally. The coil number was increased from 6 in 14 this time, and the optimization of the primary current was done, and the improvement on characteristics was attempted. Here, starting torque characteristics, quenching detection protection control circuit are reported. (NEDO)

  3. Performance of bismuth tape current leads under vibration; Bi tepu sei denryu rido no shindo tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, E.; Kurihara, M. [Railway Techniical Research Institute, Tokyo (Japan)

    2000-02-25

    The superconducting magnets on Maglev vehicles when running vibrate mechanically due to electromagnetic disturbance from the ground coils. Therefore, the current leads fixed on the superconducting coil, which is vibration at about 98 m/s{sup 2} (=10g), are also required to endure the vibration. We executed dynamic vibration tests for two types of current leads (straight and arc types) which had a multi-stacked configuration of Ag-sheathed Bi2223 tapes impregnated with epoxy resin in a concaved reinforcing gutter. We evaluated the straight-type lead for an operating current of 700 A after every vibration test in liquid nitrogen for one hour under the dynamic strain deformation of 50-100 {mu} on the surface of the reinforcing material covering the current lead. We could not detect degradation of the current lead by vibration through the total cycles of 3.9 x 10{sup 6} after continuous vibration tests. We also executed vibration tests for arc-type current leads which were combined with an actual energized superconducting coil for a Maglev. Large accelerations of these current leads occurred at frequencies of 308 and 375 Hz. In spite of the maximum acceleration of 600-700 m/s{sup 2} generated by actuating the excessive force on a superconducting coil for two seconds, which occurred on these current leads carrying 500 A, the superconductivity of the current leads did not shift to normal conductivity. There was no damage to either type of current lead during these vibration tests. So we confirmed the good prospect for the application of these current leads to actual Maglev superconducting magnets. (author)

  4. Driver characteristics in winding roads in mountains; Sangaku kyokusenbu sokoji no untensha no unten tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Nagai, M; Onda, M; Miyamoto, N [Tokyo University of Agriculture and Technology, Tokyo (Japan); Kojima, Y [National Research Inst. of Police Science, Tokyo (Japan)

    1997-10-01

    Characteristics of speed and directional controls of novice drivers were examined by comparing with those of experienced drivers. The behavior were analyzed on a severe comer for a case study and on a 3km length of the test section for a statistical study. As a result, the novice drivers is unskillful at speed control especially on the down-grade in winding roods, and lateral and longitudinal acceleration is not so smooth as the experienced driver. 9 refs., 11 figs.

  5. Validação da escala de ritmo circadiano - ciclo vigília/sono para adolescentes Validación de la escala de ritmo circadiano - ciclo vigilia / sueño para adolescentes Validity of a circadian rhythm scale - sleep/wake cycle for adolescents

    Directory of Open Access Journals (Sweden)

    Márcia Finimundi

    2012-09-01

    Full Text Available OBJETIVO: Validar a Escala Puberty and Phase Preference, de Carskadon, Vieira e Acebo (1993, traduzida para a língua portuguesa, que investiga os horários de acordar e dormir de adolescentes e seus sentimentos com relação a estes, denominando-os matutinos ou vespertinos. MÉTODOS: Participaram do estudo 144 alunos do ensino fundamental, 86 meninos e 58 meninas, com média de idade de 13,2±1,6 anos. A validade de constructo foi por critério preditivo. A escala de ritmo circadiano foi aplicada na sala de aula; após um mês de tal aplicação, os alunos foram solicitados a responder por sete dias consecutivos outro questionário. Este perguntava, referente ao dia anterior, o horário em que foi dormir e, referente ao próprio dia, o momento em que despertou. Para avaliar as evidências de validade de critério foram comparadas as médias por análise de variância one-way e teste post-hoc da diferença mínima significativa. RESULTADOS: As propriedades psicométricas da escala mostraram-se satisfatórias. A análise de consistência interna pelo alfa de Cronbach foi de 0,791. CONCLUSÕES: Os resultados indicaram fidedignidade e validade nas preferências de alocação do ciclo vigília e sono. Os índices foram significativos e direcionados aos horários esperados, evidenciando a validade da escala.OBJETIVO: Validar la Escala Puberty and Phase Preference, de Carskadon, Vieira e Acebo (1993, traducida al portugués, que investiga los horarios de despertar y dormir de adolescentes y sus sentimientos respecto a esos horarios, nombrándolos matutinos o vespertinos. MÉTODOS: Participaron del estudio 144 alumnos de la primaria, 86 muchachos y 58 muchachas, con promedio de edad de 13,2±1,6 años. La validez de constructo fue por criterio predictivo. La escala de ritmo circadiano fue aplicada en el aula; después de un mes de esa aplicación, se solicitó que los alumnos contestaran, durante siete días consecutivos, a otro cuestionario.

  6. Fiscal 2000 achievement report on the venture business assisting type regional consortium - Core industry creation type. Research and development of polisher robot system using intelligent force control; 2000 nendo chiiki consortium kenkyu kaihatsu jigyo seika hokokusho. Intelligent ryoku seigyo wo mochiita kenma robot system no kenkyu kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    The effort aims to automatize the manufacture of wooden furniture by robotizing the polishing work in the field of wooden furniture manufacturing, making use of the seeds provided by intelligent force control technologies. The intelligent force control technologies ('Delicate control of force for the open architecture type industrial robot' and 'Method for target orbit generation not requiring joystick teaching') of Saga University and the interior laboratory of Fukuoka Prefectural Industrial Research Institute are evolved and applied, and are integrated with the 3-dimensional object modelling technology developed by the mechanical and electronic laboratory, Fukuoka Prefectural Industrial Research Institute, and the CAD (computer aided design) data conversion technology developed by ASA Systems Inc. The result was a polisher robot system experimentally fabricated to satisfy the need of an automated polishing process in the wooden furniture manufacturing industry. The robot was tested, and achieved a surface coarseness level of 5{mu}m or less. As for the manufacturing rate, it attained a rate of approximately 100mm/s which was two times higher than the rate to be expected from a skilled worker. (NEDO)

  7. DUE VIE ALL’ABBONDANZA? «Le regole seguite dalla Natura sono adeguate ad essa. Quelle seguite dall’uomo sono adeguate per l’uomo»

    Directory of Open Access Journals (Sweden)

    Finzi

    2014-12-01

    Full Text Available Produce more or want less? The question, posed by anthropology, is here presented starting from the ancient myth of the golden age and its end determined by Jupiter curis acuens mortalia corda. At this point in history born the property – «the only case where the origin of natural rights is not altogether plain» (A. Smith – leading men to «la possession des choses – says the Encyclopédie – dont ils ont un besoin naturel; mais elle leur donne en même tems la notion d’une infinité de besoins chimériques qui les pressent mille fois plus vivement que des besoins réels» . The way is therefore to produce more and more for growing needs. The knowledge of the «savages» of America strengthens this tendency, whose main «instrument» is the division of labor. Gradually, however, there is a clash or a contradiction between «the rules» which nature «follows [...] fit for her» and those which man «follows for him».

  8. Desulfurization and oxidation behavior of ultra-fine CaO particles prepared from brown coal; Kattan wo mochiite choseishita CaO chobiryushi no datsuryu tokusei to sanka tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Benjamin, G.; Roman, M.; Yamazaki, Y.; Abe, H.; Harano, Y.; Takarada, Y. [Gunma University, Gunma (Japan). Faculty of Engineering

    1996-10-28

    The effect of reaction temperature and oxygen concentration on the desulfurization and oxidation behavior of ion-exchanged brown coal by Ca as new desulfurizing agent was studied. In experiment, Yallourn coal was used for ion- exchange, and limestone produced in Tochigi prefecture was also used for comparative study. Ca-exchanged brown coal was prepared by agitating coal in Ca(OH)2 slurry for 24 hours. The desulfurization behavior of a desulfurizing agent was obtained by measuring H2S and sulfur compounds in outlet gas of a reactor, and the oxidation behavior by measuring SO2 emission in outlet gas after oxidation reaction. As the experimental result, CaO produced from Ca-exchanged brown coal offered the extremely high activity to desulfurization reaction in a temperature range of 850-950{degree}C as compared with limestone. Although the oxidation behavior was dependent on oxidation temperature and oxygen concentration, CaS obtained from Ca-exchanged brown coal was more rapidly converted to CaSO4 than limestone. 3 refs., 8 figs., 2 tabs.

  9. Emission characteristics of premixed lean diesel combustion. Effects of injection nozzle and combustion chamber shape on combustion and emission characteristics; Kihaku yokongo diesel nensho no haishutsubutsu tokusei. Funmu keijo oyobi nenshoshitsu keijo ga haishutsu gas tokusei ni oyobosu eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Harada, A; Sasaki, S; Miyamoto, T; Akagawa, H; Tsujimura, K

    1997-10-01

    Many articles about low NOx emission combustion are reported. A mixture formation is necessary to success low NOx emission combustion. But, there is few reports about the effect of nozzle and combustion shape on emissions which give influence on mixture. In this paper, the effects on characteristic of combustion and emissions of some land of injection nozzle and combustion chamber shape were investigated. As a result, it was cleared that the influence of combustion chamber shape on characteristic of combustion and emissions was varied by spray shape, and pintle type injection nozzle was suitable for PREDIC. 7 refs., 10 figs., 1 tab.

  10. Transient desorption characteristics of fibrous organic adsorbent; Sen'ikei yuki kyuchakuzai no katoteki dacchaku tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Inaba, H.; Ozaki, K.; Horibe, A. [Okayama University, Okayama (Japan). Faculty of Engineering; Shimoyama, R. [Okayama University, Okayama (Japan); Kida, T. [Japan Exlan Co. Ltd., Osaka (Japan)

    1999-11-25

    An experimental investigation was performed to determine time transient desorption characteristics of a fibrous type organic adsorbent, which was composed of the bridged complex of sodium polyacrylate as a new kind of adsorbent. The test fibrous adsorbent was packed in a cylindrical vessel, and dry air was passed through it. The experiments were conducted under various conditions of air velocity, temperature, relative humidity and vessel length. As a result, time pressure loss for the packed bed of the test fibrous adsorbent showed a similar tendency to that for the packed bed of spherical particles. The mass transfer data was correlated by the modified Sherwood number, the Reynolds number, the Schmidt number, the ratio of desorbed water vapor mass to fibrous absorbent mass, the nondimensional temperature and the ratio of vessel length to fiber diameter. Fourier number for the nondimensional temperature and the ratio of desorbed water vapor mass to fibrous adsorbent mass, the nondimensional temperature and the ratio of vessel length to fiber diameter. (author)

  11. Geological structure of Osaka basin and characteristic distributions of structural damage caused by earthquake; Osaka bonchi kozo to shingai tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Nakagawa, K; Shiono, K; Inoue, N; Senda, S [Osaka City University, Osaka (JP. Faculty of Science); Ryoki, K [Osaka Polytechnic Collage, Osaka (Japan); Shichi, R [Nagoya University, Nagoya (Japan). Faculty of Science

    1996-05-01

    The paper investigates relations between the damage caused by the Hyogo-ken Nanbu earthquake and the deep underground structures. A characteristic of the earthquake damage distribution is that the damage concentrated near faults. Most of the damages were seen on the side of faults` relatively falling rather than right above the faults and of their slightly slanting to the seaside. Distribution like this seems to be closely related to underground structures. Therefore, a distribution map of the depth of basement granite in Osaka sedimentary basin was drawn, referring to the data on basement rock depth obtained from the distribution map of gravity anomaly and the result of the survey using the air gun reflection method. Moreover, cubic underground structures were determined by 3-D gravity analysis. The result was concluded as follows: when observing the M7 zone of the low land, in particular, where the damage was great from an aspect of gravity anomaly, the basement rock below the zone declined near the cliff toward the sea, which indicates a great possibility of its being a fault. There is a high possibility that the zone suffered mostly from the damage caused by focusing by refraction and total reflection of seismic wave rays. 3 refs., 8 figs.

  12. Influence of angle of inclination on power of solar module; Taiyo denchi module no keisha kakudo to shutsuryoku tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Tsutsumi, K.; Nishitani, M. [Dai Ichi University, College of Technology, Kagoshima (Japan)

    1997-11-25

    Experiment/study were conducted on the influence of angle of inclination on output of solar modules. In the experiment, changing the angle of inclination of the photovoltaic module installed on the top of school building to 0, 30, 60 and 90 degC, the global radiation on an inclined surface was measured by pyranometer equipped with the module, and at the same time output characteristics were measured by I-V curve tracer. In the I-V curve tracer, voltage, current, and output capability diagram are illustrated automatically changing bias voltage to get the maximum output. The global radiation on an inclined surface and the maximum output indicated an almost proportional relation and were expressed in a recursion method. Moreover, measurement of the global radiation is usually conducted using the amount of global radiation on a horizontal surface, and the global radiation on an inclined surface is calculated as a sum of the direct solar radiation amount and the sky solar radiation amount after determining a penetration rate by the relational equation. By calculating the global radiation on an inclined surface, it becomes possible to calculate the maximum output of photovoltaic modules by this recursion method. 1 ref., 6 figs., 1 tab.

  13. Studies on characteristics of fluid dynamics in the coal liquefaction reactor; Sekitan ekika hanno tonai no ryudo tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Sakawaki, K.; Nogami, Y.; Inokuchi, K. [Mitsui SRC Development Co. Ltd., Tokyo (Japan); Mochizuki, M.; Imada, K. [Nippon Steel Corp., Tokyo (Japan); Tachikawa, N.; Moki, T.; Ishikawa, I. [Japan Atomic Energy Research Institute, Tokyo (Japan)

    1996-10-28

    To design the coal liquefaction reactor of large scale plant in future, it is important to understand characteristics of fluid dynamics within the coal liquefaction reactor. In this study, to measure the fluid dynamics of liquid phase within the coal liquefaction reactor operated under high temperature and high pressure coal liquefaction condition, neutron attenuating tracer (NAT) technique, one of the tracer test methods, was applied using 1 t/d coal treating PSU. The residence time of liquid phase within the reactor can be measured by utilizing property of neutron of being absorbed by materials. The tracer was injected at the inlets of first and third reactors, and the neutron was counted at each outlet. The concentration of tracer was derived from the discrete value, to determine the residence time distribution of liquid phase. The mean residence time of liquid phase in the single first reactor and in the total three reactors were prolonged under the severe operation conditions of liquefaction. The more severe the liquefaction operation condition was, the more active the mixing of liquid phase was in the first reactor. It was found that the progress of reaction was accelerated. 2 refs., 5 figs., 1 tab.

  14. Coal Liquefaction characteristics and chemical structure of product oil; Sekitan ekika hanno tokusei to seiseibutsu no kagaku kozo

    Energy Technology Data Exchange (ETDEWEB)

    Endo, H.; Sato, M.; Chiba, T.; Hattori, H. [Hokkaido University, Sapporo (Japan). Center for Advanced Research of Energy Technology; Sasaki, M. [Hokkaido National Industrial Research Institute, Sapporo (Japan)

    1996-10-28

    Through the hydrogenolysis of Wandoan coal and Tanito Harum coal which are used for the NEDOL process, differences of liquefaction characteristics between them were found. The purpose of this study is to grasp these differences as differences of chemical structures of oil fractions. The compound type analysis was conducted for oil fractions obtained at varied reaction temperature for varied reaction time. Coal liquefaction characteristics of these coals were discussed by relating oil yields and chemical structures. For Tanito Harum coal, yields of gas and oil were considered to be lower than those for Wandoan coal, which reflected that the contents of partially hydrogenated hydroaromatics in oil fraction from the former were lower than those from the latter, and that the remarkable change of composition did not occur with the progress of the reaction. For both the coals, the remarkable changes in the average molecular weight of oil fraction were not observed with the progress of the reaction. While, the content of methane gradually increased with the progress of the reaction, which suggested that oil was gradually dealkylated. 5 figs.

  15. Performance of mesh seam welds in tailor welded blanks; Terado blank yo mash seam yosetsubu no tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Uchihara, M; Takahashi, M; Kurita, M; Hirose, Y; Fukui, K [Sumitomo Metal Industries, Ltd., Osaka (Japan)

    1997-10-01

    Formability, fatigue properties and corrosion behavior of mash seam welded steel sheets were investigated and the results were compared with laser weld. The stretch formability of mash seam weld and laser weld were same level. Mash seam weld however, showed slightly smaller formability in hole expansion test. The fatigue strength of mash seam welds was lower than that of laser welds in case of differential thickness joints. Corrosion was apt to initiate at weld in both mash seam and laser weld with E-coat. The corrosion resistance of welds was improved by using zinc coated steel. 3 refs., 14 figs., 2 tabs.

  16. Emission and combustion characteristics of multiple stage diesel combustion; Nidan nensho ni yoru diesel kikan no nensho to haishutsubutsu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Hashizume, T; Miyamoto, T; Tsujimura, K [New A.C.E. Institute Co. Ltd., Tokyo (Japan); Kobayashi, S; Shimizu, K [Japan Automobile Research Institute, Tsukuba (Japan)

    1997-10-01

    A new concept of multiple stage diesel combustion was studied by means of engine test, combustion observation and numerical simulation, in order to reduce NOx emissions at high load conditions. With this concept, the premixed combustion occurs under the fuel lean conditions and the diffusion combustion occurs under the high temperature conditions. As seen in the result of combustion observation, a first stage combustion occurs with no luminous flame. A second stage combustion occurs with a luminous flame after very short ignition delay period. However the luminous flame is disappeared immediately. Because cylinder temperature is high, and hence soot oxidizes immediately. 5 refs., 11 figs., 1 tab.

  17. Impedance frequency characteristics of the MAGLEV power feeding circuit; Jiki fujoshiki tetsudo ni okeru kidenkei no inpidansu shuhasu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Ema, S [Numazu College of Technology, Shizuoka (Japan); Ajiki, K [Railway Technical Research Inst., Tokyo (Japan)

    1993-09-20

    In connection with the impedance frequency characteristics of the coils for propulsion and the power feeding circuit of the magnetically levitated train (MAGLEV), the inverted L circuit and T circuit as equivalent circuits for the coil for propulsion and for the power feeding, respectively, are proposed and analyzed. The simulated result and the result of measurement reported by now are in good agreement, the measured values and calculated values being almost equal in both the characteristics of the coils for propulsion and those of the power feeding circuit. The validity of the two equivalent circuits are clarified, and the frequency characteristics are verified theoretically. The impedance frequency characteristics of the coils for propulsion which are peculiar to MAGLEV are investigated with the power feeding circuit consisting of the power feeding line and propulsion coils. Lastly, simulation is carried out for the coils for propulsion with several hundred propulsion coils and for the power feeding system assuming the commercial line. As a result, it is found that the antiresonant frequencies are decreased to about one tenth in both of the characteristics. 11 refs., 18 figs.

  18. Study on aero-dynamic characteristics of the sloop rig (continued); Sloop ring no kuriki tokusei no ichikaiseki (zoku)

    Energy Technology Data Exchange (ETDEWEB)

    Shinkai, A.; Iyoda, H. [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    1997-09-04

    A numerical simulation method was formerly provided for analyzing aero-dynamic characteristics of sloop rig by the vortex distribution method. For this method, aero-dynamic characteristics of the sloop rib were formulated by treating air flow around sail as a two-dimensional problem and by assuming sail as a membrane. The sloop rig is a yacht for more than two persons, which is the most popular form of rig. A main sail and a jib sheet are fixed on a mast. In this study, the method developed based on the panel method was introduced for analyzing the effects of jib sheet which can control the jib trim angle. Generality of the present aero-dynamic characteristics was enhanced, and problems of the analysis method were extracted through the numerical simulation of a yacht with sloop rig. Influence of the position of fairleader on the aero-dynamic characteristics was qualitatively grasped by considering the effects of jib sheet and by trimming the elevation into ideal one. 6 refs., 11 figs.

  19. Fundamental characteristics on electric system of solar electric vehicle; Solar car no denki keito ni kansuru kiso tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Fujita, S; Sasaki, M; Kaga, T; Koyama, N [Hachinohe Institute of Technology, Aomori (Japan)

    1996-10-27

    The electric system of a solar vehicle was removed and the fundamental characteristics examined in order to carry out a basic experiment on the electric system. Using a basic circuit with panels, batteries and loads connected, the voltage and current were measured in the presence/absence of the trackers, batteries, etc., and then, their effects were examined. Simultaneously, the quantity of solar radiation was also measured. The lowering of the output voltage was somewhat relaxed with the use of the trackers. Further, with the trackers used, the output voltage of the panel was small in spite of a large quantity of solar radiation compared to the case without the trackers, which was due to the restriction of the output voltage by the trackers. When measured without batteries, the output voltage of the panel was such that the load current was also influenced by the variation of insolation, so that, with a large decrease in insolation, the load current was decreased with the supply of current suspended from the panel. 7 figs., 1 tab.

  20. Accuracy of parameters of permeable fractures by hydrophone VSP; Hydrophone VSP ni yoru tosuisei kiretsu no tokusei hyoka no seido

    Energy Technology Data Exchange (ETDEWEB)

    Kiguchi, T; Ito, H; Kuwahara, Y; Miyazaki, T [Geological Survey of Japan, Tsukuba (Japan); Yabuuchi, S; Hasegawa, K [Power Reactor and Nuclear Fuel Development Corp., Tokyo (Japan)

    1997-10-22

    Hydrophone VSP (vertical seismic profiling) experiment is under way as a technique for detecting subsurface water-permeable cracks by use of boreholes and for evaluating their characteristics (permeability index, crack direction, dip angle). In this report, tube waves observed by hydrophone VSP are subjected to analysis for the determination of water-permeable crack characteristics, the impact caused by errors in the value inputted for analysis is estimated, and a model calculation is performed in case there is no agreement between data from the borehole and data from VSP, all for examining the VSP records for accuracy. When an error rate of 15% is given to the tube wave/P-wave amplitude ratio, a change of 40% or lower results in the permeability index, and a change of 10deg or less in the dip angle, which means that an error in the amplitude ratio does not affect the analysis very much. Changes in the amplitude ratio resulting from changes in crack direction and dip angle differ, dependent on the offset rate. When angular differences among plural crack directions are within 90deg and dip angles within 60deg, the result of analysis represents the average characteristics of the plural cracks. 7 refs., 5 figs., 2 tabs.

  1. Prediction of blast vibration level considered propagation characteristics; Denpa tokusei to koryoshita happa shindo level no yosoku

    Energy Technology Data Exchange (ETDEWEB)

    Kunimatsu, S; Jinguji, M [National Institute for Resources and Environment, Tsukuba (Japan); Yamada, M; Hirai, T [Newjec Inc., Osaka (Japan); Durucan, S; Farsangi, M

    1997-10-22

    With an objective to assess environmental influence induced by blast vibration, a study has been carried out on a method to predict vibration levels. The study has discussed a method to calculate vibration levels, in which vibration propagating characteristics are sought on blast vibration generated from an open-cut limestone mine from acceleration waveforms in the vicinity of the blast source and residential housings by using an octave analysis, and waveforms are predicted. The shortest straight line distance from the blast position to a housing is about 150 m, and the height difference is about 30 to 40 meters. The measuring instruments include a vibration level meter used for pollution measurement and a data recorder, with signals lower than 1 Hz and higher than 90 Hz being interrupted. The environmental influence assessment discusses not only the maximum value of the vibration level, but also sizes of values of each band by using a frequency analysis. The result of the discussions revealed that the prediction of the vibration levels is little affected by phase characteristics, and that no problems are caused in the measurement accuracy even if the vibration levels are predicted by using relative decay amount according to a one-third octave analysis for the propagation characteristics. 5 figs., 4 tabs.

  2. Hydrogenolysis reactions characteristics of deashed coal under low temperature; Teionka ni okeru dakkai shoritan no suisoka bunkai hanno tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Owada, T.; Mashimo, K.; Wainai, T. [Nihon University, Tokyo (Japan). College of Science and Technology

    1996-10-28

    In relation to coal liquefaction, the effect of inorganic minerals on liquefaction reactivity and the effect of hydrofluoric acid (HF) treatment on organic molecular structure of coals were studied by demineralization of low-rank coals in HCl or HF solution. In experiment, Taiheiyo coal specimen was deashed in HCl solution at 25-70{degree}C for 6 hours while agitating, and in addition, deashed in HF solution. Hydrogenolysis of the deashed coal specimen was conducted using tetralin or methylnaphthalene as solvent under initial hydrogen pressure of 1.96MPa at reaction temperature of 693K for 60min. The experimental results are as follows. The ash content of Taiheiyo coal hardly offers catalysis in hydrogenolysis reaction. Carboxyl group increases in demineralization of coal because of breakage of bridged bonds. Organic structure of coal changes by demineralization in dense HF solution. Change in organic structure of coal by demineralization in dense HF solution is dependent on treatment temperature. 2 refs., 4 figs., 1 tab.

  3. Predict optimize the friction characteristics of brake pads; Brake pad no masatsu tokusei no yosoku to saitekika

    Energy Technology Data Exchange (ETDEWEB)

    Saotome, H [Nissin Kogyo Co., Tokyo (Japan); Kato, T [The University of Tokyo, Tokyo (Japan)

    1997-10-01

    The effect of the friction and the wear properties of brake pads were experimentally studied using a test rig of scale of 1/10 of the system used in a commercial car. The experimental data were investigated by the Multiple Regression Analysis and the Neural Network, and the effects of volume % of components on the friction and the wear properties were predicted. In addition the components of brake pads are optimized by Genetic Algorithms. 8 refs., 9 figs., 4 tabs.

  4. Photometric analysis on concentration characteristics of Fresnel lenses; Fotometoriho wo mochiita Fresnel lens no shuko tokusei kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, A [Tokyo University of Agriculture and Technology, Tokyo (Japan)

    1997-11-25

    Light concentration characteristics of Fresnel lenses were analyzed by using photometry. Light concentrating systems include a reflective system represented by a rotary parabolic mirror, and a refractive system represented by the Fresnel lens. The refractive system has a focused section broadened as much as the dispersion effect in association with refraction, and cannot derive a focus with high magnification as compared with the reflective system which can achieve it. The refractive system causes reduction in collected light intensity to about half on a parax, hence a large amount of loss. However, the system can be made available inexpensively due to mass production by using mold formation. Although it is difficult to utilize all of the light, 95% of the received radiation is concentrated in an opening area with a radius of about 4G (G is a radius of an image of solar light at a focus plane which passes through the center of a Fresnel lens). The average magnification of light concentration at this time in the opening area reaches 390 times. When a 3-D compound parabolic concentrator (CPC) with a radius of 4G is placed on a lens focus as a secondary light concentrator, the final magnification of light concentration shows a value of about 2700 times, whereas restoration of 39% is possible, as compared with a rotary parabolic mirror. The system has sufficient possibility to be used for high-temperature light concentration. 3 refs., 5 figs., 1 tab.

  5. Output characteristics of torsion arc blade type horizontal axis windmill; Nejire enko yokugata suiheijiku fusha no shutsuryoku tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Kojima, N; Kishimura, K [Meiji University, Tokyo (Japan)

    1997-11-25

    The previous paper theoretically analyzes characteristics of a torsion arc blade type (TABT) horizontal axis windmill to derive the theoretical equations, which give the results in good agreement with the observed ones, when multiplied by a blade shape factor. This paper discusses that the theoretical and observed results are in good agreement with each other by taking into consideration shape-related solidity and number of blades. The following findings are obtained, when parameters related to a 6-blade TABT horizontal axis wind mill are introduced and hysteresis brake is used as the load resistance for torque measurement. Shape factor can be represented by two factors of blade number and solidity. The same equation for shape factor is applicable to both elliptical and rectangular blades. These blades need different theoretical equations to give the results in agreement with the observed ones, when operated at a tip speed ratio (TSR) of 1.77 and 1.58, respectively. Rotational force is affected by the rear blade shape when they are operated at a respective TSR below the above level, but unaffected at beyond the above level. 5 refs., 9 figs., 1 tab.

  6. Fundamental characteristics of new electric power storage equipment celled `ECS`; Atarashii denryoku chozo sochi `ECS` no kisoteki tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Okamura, T.; Yamagishi, M.

    1997-01-30

    This paper introduces new electric power storage equipment called an energy capacitor system. A special electrically double-layered capacitor with its energy density raised in sacrifice of internal resistance has the current so adjusted that loss will not increase by using a switching converter (consisting of a charger and a current pump). The capacitor is charged and discharged at high efficiency. Upper limits of the charge voltage for each capacitor are connected with parallel monitor circuits so that maximum charge voltage of each capacitor will be aligned at one level, wherein charge and discharge are performed with that voltage used as the starting point. A drawback in a capacitor is lower energy density than in a secondary battery. Therefore, high voltage withstanding organic electrolyte was used, and electrode activated carbon was given discussions starting from its raw material structures. The efforts resulted in obtaining as high energy density as 43 Wh/kg (about 20 times as much as in conventional materials, and comparable to lead-acid batteries). In order to minimize heat generation due to the increased internal resistance, a switching converter was used to suppress charge/discharge currents to the minimum required levels. Although the capacitor still has insufficient voltage withstanding power and short life, the energy density is increasing beyond the initial estimation. The next problem to be solved is reduction in production cost for its industrialization. 4 refs., 4 figs., 2 tabs.

  7. Improvement of superconducting cylindrical linear induction motor; Chodendo entogata tan'ichiji rinia yudo mota no tokusei kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Kikuma, T.; Ishiyama, A. [Waseda Univ., Tokyo (Japan)

    2000-05-29

    For the purpose of examining the characteristics (effect of stability and ac loss by the higher harmonic wave etc.) of an alternating current superconductivity winding under a real machine operating environment of the super-conductive AC machine vessel, authors produced a cylindrical shortness first linear guiding motor (SCLIM) which used the NbTi/CuNi super-conducting cable for the first excitation winding experimentally. In this study, the evaluation of the start up thrust and operation confirmation of the quenching detection protection circuit were carried out using the produced SCLIM. In the quenching detection protection control circuit, the first excitation winding was divided into an internal layer and an outer layer, and both layers were excited in the 2 layer division and a quenching detection protection circuit was installed on the 2 layers respectively. The circuit of a part of fact by this of the phase in which the quench was generated and observed was cut off, and the operation would be able to be continued in part of the remainder of the phase and other two phases. Here, it is to cut off the quenched phase from the circuit, when the phase current becomes zero, and the other effect on the phase is held as small as possible. (NEDO)

  8. Mechanical properties of weft knitted fabric reinforced composites. Iamimono kyoka fukugo zairyo no rikigakuteki tokusei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Wu, W.; Inoda, M.; Kotaki, M.; Goto, A.; Fujita, A.; Hamada, H.; Maekawa, Z. (Kyoto Institute of Technology, Kyoto (Japan). Faculty of Textile Science)

    1993-09-15

    Mechanical properties and failure behavior of weft knitted fabric reinforced composites were studied. Aramid fiber was used as reinforcement (knitting fiber), and epoxy resin as matrix. Different tensions were applied to the weft knitted fabric in a course or wale direction to prepare 5 kinds of fiber reinforced composites with different densities of the knitted fabric, and tensile test pieces were thus provided by cutting each composite in a course or wale direction. As a result, the weft knitted fabric reinforced composite offered a dynamical anisotropy, and the tensile strength of the test pieces was higher in wale direction than course one. Fracture in a course direction occurred at the section with extreme low fiber content, while fracture in a wale direction occurred at a loop interlocking region due to stress concentration. The tensile strength was constant or increased in a course or wale direction by stretching the knitted fabric before molding, respectively. 21 refs., 15 figs., 2 tabs.

  9. Study on thermochemical liquefaction of biomass feedstocks; Biomass genryo no yuka hanno tokusei ni kansuru kisoteki kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-02-10

    Liquefaction is applied to various biomass wastes and unused biomass to study characteristics of the liquefaction in each case. The paper described the system of the conversion and use of biomass into energy, conducted the positioning of the liquefaction, and outlined a history of the liquefaction chemistry and the study. To obtain basic data of characteristics of the liquefaction of various biomass raw materials, the liquefaction was conducted changing operational factors for the purpose of clarifying the product distribution of oil and by-products and oil properties. A comprehensive consideration was made of the liquefaction based on basic data and literature reports on the liquefaction of various biomass. From the above-mentioned studies, it was concluded that the energy can be recovered in a form of oil by applying the liquefaction to various biomass materials. A series of the study clarified effects of various operational factors on characteristics of the liquefaction as well as effects of classification of biomass materials and composition of the materials on characteristics of the liquefaction. 141 refs., 78 figs., 56 tabs.

  10. Ring shear characteristics of clays in fractured-zone-landslide. Hasaitai chisuberichi no nenseido no ring sendan tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Yatabe, R; Yagi, N; Enoki, M [Ehime Univ., Ehime (Japan). Faculty of Engineering

    1991-09-20

    The importance of study on the residual strength, in addition to the peak strength, has been pointed out for the study of landslides. The residual strength characteristics, effects of shearing rate, and grain size of clays, as well as the residual strength characteristics of clay minerals of a fractured zone landslide were examined by ring shear tests. The residual friction angles {phi}{sub r} of the tested clays of the fractured zone landslide were from 10 to 31{degree}, and were smaller than those of shearing resistance angles {phi}{prime} obtained by triaxial tests by 5 to 15{degree}. Contrary to the pointing out made hitherto, no correlation between clay content CF and plastic index was recognized for {phi}{sub r} of clays of a fractured zone landslide. As regards CF, the relation with CF was far below the lowest limit indicated by now. Ring shear characteristics of principal structural clay minerals, vermiculite, mica, illite, chlorite, and kaolinite were investigated. {phi}{sub r} of these clay minerals were in the range from 10 to 25{degree}. 20 refs., 14 figs., 2 tabs.

  11. Supercavitation hydrofoil performance and torsional flutter margin; Supercavitation yokugata no teijo hiteijo tokusei to nejiri flutter genkai

    Energy Technology Data Exchange (ETDEWEB)

    Matsudaira, Y.; Obara, H. [Tokyo Metropolitan Institute of Technology, Tokyo (Japan); Nakagawa, H. [Sumitomo Heavy Industries, Ltd., Tokyo (Japan); Yoshida, H. [Tokyo Metropolitan Institute of Technology, Tokyo (Japan)

    2000-08-25

    Supercavitation hydrofoil applied to high-speed marine propeller or hydro-machinery blade runs into unsteady behaviors such as cavitation breakdown and hydraulic flutter in some operation range. The hydrofoil performance was experimentally estimated and compared with the wedge performance using the cavitation tunnel and the torsional vibration apparatus with three component load cells, This experiment was carried out at several angles of attack in the region from subcavitation to supercavitation. At a general steady state but including some cavitation breakdowns, the hydrofoil has the most superior time mean lift/drag ratio about 6 < C{sub l}/C{sub d} < 8 at in all cavitation regions. But, the ratio drastically decreases as the angle of attack increases. Fluctuating lift coefficient C{sub l}{sup '} due to the cavitation breakdown reaches up to about 10% of time mean lift coefficient C{sub l}. At the hydrofoil pitching motion, the torsional flutter margin of the hydrofoil extends to higher reduced frequency side as the angle of attack increases and has the nearly same margin of the wedge in all cavitation regions. (author)

  12. Unsteady performance of a cavitating hydrofoil in stall conditions. Shissoku jotai ni okeru yokukei no hiteijo tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Ogata, H. (Tohoku University, Sendai (Japan)); Ito, Y. (Hachinoe Institutea of Technology, Aomori (Japan)); Oba, R. (Tohoku University, Sendai (Japan). Institute of Fluid Science); Sunayama, Y.; Abe, J. (Suzuki Co. Ltd., Shizuoka (Japan))

    1991-11-25

    To elucidate the unsteady performance of cavitating hydrofoils in a stall condition, this paper describes a survey on unsteady conditions without cavitations and stall conditions as to their characteristics from a cavitation to a supercavitation, lift and drag. Flows with cavitations were also analyzed. As a result of comparing also data for the subcavitation regions, it was found that a large-scale vortex generation on the hydrofoil back-pressure plane in near stall condition has a close relation with the changes in lifts and drags or the cavitation breakdown. The experiment used a testing water tank of circulation flow type having a rectangular measuring cross section (70 mm in width and 190 mm in height), and the hydrofoil specimens of two-dimensional symmetric type with a chord length of 70 mm and an aspect ratio of 1.0. The test condition used a cavitation coefficient of 0.18-6.33 (from a supercavitation to non-cavitation). A numerical analysis proved that the power spectra around the hydrofoils having no cavitations agreed with the experimental results, and verified the reasonability of the application. 18 refs., 8 figs., 2 tabs.

  13. Basic characteristics of new shape formed coke in burden distribution; Shingata seikei cokes no sonyu bunpu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Ichida, M; Yamamoto, T; Komaki, I; Oda, H; Matsunaga, S; Matsuzaki, S; Deno, T; Konno, N [Nippon Steel Corp., Tokyo (Japan)

    1996-12-01

    Basic characteristics in burden distribution and charging pattern of new shape formed coke developed in order to improve the properties of small size and low void fraction that pillow-type formed coke h s were conducted by 1/3 scale charging model and mathematical model of blast furnace. Basic characteristics, those are, inclination angle, coke-collapse and trajectory of new shape formed coke are almost the same as those of conventional coke. In the case of wall charging of new shape formed coke, until 60% of total charged coke, new shape formed coke is able to be charged without it`s rolling to the center. It is possible to apply RABIT model to new shape formed coke charging without it`s major modification. In the case of new shape formed coke wall charging, the fluctuation in furnace is supposed to be smaller than that in the case of pillow-type formed coke wall charging. Moreover, it`s center charging is supposed to be applied to actual blast furnace. More accurate estimation of in-furnace phenomena by mathematical model considering coke reactivity, is a subject to be worked out in future. 11 refs., 9 figs., 5 tabs.

  14. Study on the structural characteristics of extradosed concrete bridges; Ekusutoradozudo kyo no kozo tokusei ni kansuru ichikosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Oka, Y. [Japan Highway Public Corp., Tokyo (Japan); Kasuga, A. [Sumitomo Construction Co. Ltd., Tokyo (Japan); Yamazaki, J. [Nihon Univ., Tokyo (Japan). Coll. of Science and Engineering

    1997-03-31

    Parameters are analyzed to provide data for deciding, in the planning and designing stages, whether a cable stayed bridge or an extradosed bridge should be adopted. Comparative investigation of the vibration properties of both types of bridges is also referred to. The result of the study on the structural properties of the cable stayed road bridge and the extradosed road bridge is introduced. Based on the concept of the extradosed bridge, designers are now able to select without restraint the after load sharing rate of the diagonal members. Parameter analysis of a diagonal member reinforced 3-span continuous beam is performed. By introducing indices showing the load sharing rate of the diagonal member, the cable stayed bridge can be distinguished logically from the extradosed bridge in designing. It is found important that the height of the main tower is set to approximately 10% the length of the center span for the construction of the extradosed bridge. The vibration properties of the cable stayed bridge and the extradosed bridge of the same scale are compared. 7 refs., 18 figs., 6 tabs.

  15. Suspeita de Apneia Obstrutiva do Sono definida pelo Questionário de Berlim prediz eventos em pacientes com Síndrome Coronariana Aguda Sospecha de apnea obstructiva del sueño definida por el cuestionario de Berlín predice eventos en pacientes con síndrome coronario agudo Suspicion of Obstructive Sleep Apnea by Berlin Questionnaire predicts events in patients with Acute Coronary Syndrome

    Directory of Open Access Journals (Sweden)

    Eryca Vanessa S. de Jesus

    2010-09-01

    Full Text Available FUNDAMENTO: De um ponto de vista mecanístico, a apneia obstrutiva do sono (SAOS pode causar distúrbios extras à homeostase cardiovascular na presença de síndrome coronariana aguda (SCA. OBJETIVO: Investigar se um diagnóstico clínico padronizado de SAOS, em pacientes com SCA, prediz o risco de eventos cardiovasculares durante hospitalização. MÉTODOS: Em um estudo de coorte prospectivo, um grupo de 200 pacientes com diagnóstico de SCA estabelecido entre Setembro de 2005 e Novembro de 2007, foram estratificados pelo Questionário de Berlim (QB para o risco de SAOS (alto ou baixo risco. Foi testado se o subgrupo de alto risco para SAOS apresenta maior tendência à eventos cardiovasculares. O endpoint primário avaliado foi um desfecho composto de morte cardiovascular, eventos cardíacos isquêmicos recorrentes, edema pulmonar agudo e acidente vascular cerebral durante a hospitalização. RESULTADOS: Noventa e quatro (47% dos pacientes identificados pelo QB apresentavam suspeita de SAOS. Alto risco para SAOS estava associado com uma mortalidade mais elevada, embora sem diferença estatística (4,25% vs 0,94%; p=0,189, mas com uma estatisticamente significante maior incidência de desfecho composto de eventos cardiovasculares (18,08% vs 6,6%; p=0,016. No modelo de regressão logística, os preditores multivariados de desfecho composto de eventos cardiovasculares foram idade (OR = 1,048; IC95%: 1,008 a 1,090; p=0,019, fração de ejeção do VE (OR = 0,954; IC95%: 0,920 a 0,989; p=0,010, e risco mais elevado de SAOS (OR = 3,657; IC95%: 1,216 a 10,996; p=0,021. CONCLUSÃO: O uso de um questionário simples e validado (QB para identificar pacientes com risco mais elevado de SAOS pode ajudar a prever o desfecho cardiovascular durante a hospitalização. Além disso, nossos dados sugerem que SAOS é muito comum em pacientes com SCA.FUNDAMENTO: Desde un punto de vista mecanístico, la apnea obstructiva del sueño (SAOS puede ocasionar disturbios

  16. Reducing the influence of STI on SONOS memory through optimizing added boron implantation technology

    International Nuclear Information System (INIS)

    Xu Yue; Yan Feng; Li Zhiguo; Yang Fan; Wang Yonggang; Chang Jianguang

    2010-01-01

    The influence of shallow trench isolation (STI) on a 90 nm polysilicon-oxide-nitride-oxide-silicon structure non-volatile memory has been studied based on experiments. It has been found that the performance of edge memory cells adjacent to STI deteriorates remarkably. The compressive stress and boron segregation induced by STI are thought to be the main causes of this problem. In order to mitigate the STI impact, an added boron implantation in the STI region is developed as a new solution. Four kinds of boron implantation experiments have been implemented to evaluate the impact of STI on edge cells, respectively. The experimental results show that the performance of edge cells can be greatly improved through optimizing added boron implantation technology. (semiconductor devices)

  17. Autoclaved lightweight aerated concrete. ; Manufacture/performance/application. Keiryo kiho concrete. ; Sono seiho kino yoto

    Energy Technology Data Exchange (ETDEWEB)

    Isome, Y. (Asahi Chemical Industry Co. Ltd., Tokyo (Japan))

    1993-10-20

    This paper reviews the manufacturing process, performance, and application of autoclaved lightweight aerated concrete (ALC). ALC is produced by a two-step process composed of molding and autoclaving, using quartz, lime, portland cement, and small quantities of aluminum as raw materials. In the molding step, aluminum reacts with alkali to generate hydrogen gas, thus forming air pores in the slurry. On the other hand, calcium silicate hydrates are produced by the reaction of lime and portland cement with water, resulting in formation of voids in the intergranular spaces vacated by the reacting water. In the autoclaving step, tobermorite (crystalline calcium silicate hydrates) is formed by the reaction of quartz and calcium silicate hydrates under high temperature and high pressure steam, and the intergranular voids are reduced to micropores in size as a result of the hydrothermal reaction. The air-pore and micropore structure adds unique physical properties to the ALC, such as fire resistance, heat insulation, lightness and strength. ALC is widely used as a useful material for homes and multistory buildings. 10 refs., 10 figs., 1 tab.

  18. Genetic manipulation of woody plants and its applications. Rinboku no idenshi sosa to sono oyo

    Energy Technology Data Exchange (ETDEWEB)

    Ebinuma, H. (Jujo Paper Co. Ltd., Tokyo (Japan))

    1992-06-01

    The advance of plant biotechnology has been further accelerated by the development of the new epoch-making technique typified by the DNA amplification using the PCR (polymerase chain reaction) method. In the application of plant biotechnology to trees, the introduction of useful genes into genetically elite trees and short-period mass propagation of recombinants by micropropagation are considered to be rational strategies. In the utilization of recombinants, non-edible industrial product materials such as trees are considered to pass the safety standards more easily and also to be profitable. This paper discusses the possibilities of tree recombinants, the imparting of disease-resistance to elite trees and the biosynthetic control of lignin. The paper introduces a topic that the imparting of disease-resistance to elite trees is in a stage of transference to experiments of recombinants in a closed-system greenhouse by the construction of the crown gall resistant gene and the establishment of the gene introduction system into crossed populus sieboldii miquel. 19 refs., 4 figs.

  19. Production, property, and application of bacterial cellulose; Bakuteriaserurosu no seisan, butsusei no tokucho to sono riyo

    Energy Technology Data Exchange (ETDEWEB)

    Yamanaka, S.; Watanabe, K. [Ajinomoto Co. Inc., Tokyo (Japan). Central Research Lab.; Iguchi, M. [Agency of Industrial Science and Technology, Tokyo (Japan)] Nishi, Y. [Sony Corp., Tokyo (Japan)

    1998-09-01

    Cellulose produced by bacterial is called bacterial cellulose (BC). The morphology and physical properties of BC are found to be quite unique in comparison with those of higher class plants. The properties are elucidated and a study is made to utilize the properties. The outline of this study is introduced in the sequence of BC production, BC morphology, elucidation of the physical property, and study on the application. BC consists of ultrafine fibers, and the widths of fibers are in the range from (1/199) to (1/1,000) of cotton fibers, forming distinctive network structure. It is assumed that the high Young`s modulus is based on the structural features of BC. Researches have been made on various applications to such fields as audio, paper, food, and compounds where the features of cellulose are utilized effectively. The morphology of cellulose can be varied by adding drugs which can change a part of the protein. It is expected that cellulose structure can be controlled in the future by the application of this technology. 18 refs., 6 figs., 2 tabs.

  20. Merging microfluidics and sonochemistry: towards greener and more efficient micro-sono-reactors.

    Science.gov (United States)

    Fernandez Rivas, David; Cintas, Pedro; Gardeniers, Han J G E

    2012-11-18

    Microfluidics enable the manipulation of chemical reactions using very small amounts of fluid, in channels with dimensions of tens to hundreds of micrometers; so-called microstructured devices, from which the iconic image of chips emerges. The immediate attraction of microfluidics lies in its greenness: use of small quantities of reagents and solvents, and hence less waste, a precise control of reaction conditions, integration of functionality for process intensification, safer and often faster protocols, reliable scale-up, and possibility of performing multiphase reactions. Among the limitations found in microfluidics the facile formation of precipitating products should be highlighted, and in this context, the search for efficient mass and energy transfers is a must. Such limitations have been partially overcome with the aid of ultrasound in conventional flow systems, and can now be successfully used in microreactors, which provide new capabilities. Novel applications and a better understanding of the physical and chemical aspects of sonochemistry can certainly be achieved by combining microfluidics and ultrasound. We will review this nascent area of research, paying attention to the latest developments and showing future directions, which benefit both from the existing microfluidic technology and sonochemistry itself.

  1. Merging microfluidics and sonochemistry: towards greener and more efficient micro-sono-reactors

    NARCIS (Netherlands)

    Fernandez Rivas, David; Cintas, P.; Gardeniers, Johannes G.E.

    2012-01-01

    Microfluidics enable the manipulation of chemical reactions using very small amounts of fluid, in channels with dimensions of tens to hundreds of micrometers; so-called microstructured devices, from which the iconic image of chips emerges. The immediate attraction of microfluidics lies in its

  2. Fractional derivatives. An introduction; Derivate frazionarie. Che cosa sono, a cosa servono

    Energy Technology Data Exchange (ETDEWEB)

    Dattoli, G. [ENEA, Div. Fisica Applicata, Centro Ricerche Frascati, Rome (Italy)

    2001-07-01

    In this item is presented a brief survey of fractional calculus and of the relevant applications. In the work are discussed different points of view of the operation of fractional derivative and present a unifying definition. The role played by fractional derivatives and integrals within the framework of integral transform is analyzed. [Italian] In questo articolo si traccia un profilo del cosidetto calcolo frazionario e delle relative applicazioni a problemi di matematica pura ed applicata. Si discutono varie definizioni dell'operazione di derivata frazionaria, non tutte coincidenti fra loro, e si mostra come sia possibile proporre una definizione univoca che inglobi tutte le altre. Si analizza infine il ruolo giocato dalle derivate e dagli integrali frazionari e, piu' in generale, quello degli operatori differenziali ad esponente frazionario, nell'ambito della teoria delle rappresentazioni integrali.

  3. "Etica ed Estetica sono tutt’uno" Riflessioni su TLP 6.421

    Directory of Open Access Journals (Sweden)

    Gabriele Tomasi

    2011-01-01

    Full Text Available Per il primo Wittgenstein etica ed estetica erano tutt’uno. Scopo del saggio è fornire un’interpretazione di questa concezione. Esaminando il modo in cui è proposta nel Tractatus e considerando alcune annotazioni dei Quaderni 1914-1916 si evidenzia che l’unità di etica ed estetica è in un modo di vedere il mondo per cui esso non appare come fonte di limitazione. L’etica è un’estensione al mondo - alla vita - della capacità di conferire significato che nell’arte si realizza nei riguardi di oggetti particolari. Affermando l’unità di etica ed estetica Wittgenstein attira l’attenzione sul fatto che la radice dell’etica è in un certo modo di vedere le cose, in un atteggiamento verso la vita. Si tratta della prospettiva di un valore non connesso a come il mondo è e che è evocato dalla meraviglia per l’esistenza del mondo.

  4. Kyoto protocol and related issues; Chikyu ondanka boshi Kyoto kaigi (COP3) to sono kadai

    Energy Technology Data Exchange (ETDEWEB)

    Ninomiya, Y. [Global Industrial Social Progress Research Institute, Tokyo (Japan)

    1997-09-30

    The Third Session of the Conference of the Parties to the United Nations Framework Convention on Climate Change (COP3) will be held in Kyoto in December 1997. Described herein are the current status and issues of the convention. USA and Japan, which hold important keys to set up the abatement target, have issued no proposals concretely at the current AGBM (Ad-hoc Group Berlin Mandate) 7, and the conference for the concrete targets will be decided in the next AGBM 8 to be held in October. The final target will be set by the ministerial segment of COP3, because the negotiations for the treaty are political in nature. USA proposes reduction at a uniform, realistic rate, and Japan proposes reduction at a uniform rate or setting up the emission target per capita, each being different from reduction at a much higher uniform rate proposed by EU. Within EU, however, 10% out of 15% reduction rate it proposes is agreed by the member countries, and the remaining rate of % may not be agreed. It is necessary for the advanced parties to set up realistic and legally binding solutions, including ratification by USA, which can persuade the developing countries. tab.1

  5. Fire in Kuwaiti oil and its influence. Kuwait yuden kasai to sono eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Mizoguchi, T. (The Institute of Public Health, Tokyo (Japan))

    1993-01-10

    Fire which was brought about by the Gulf War in Kuwaiti oil fields caused artificial air pollution of the largest scale without precedent. In March, 1991 immediately after the War had come to an end, investigation was started by various organizations of different countries. Japan conducted her investigation from April to May, 1991 on. The present report gave the full particulars of air pollution investigation result together with the result of further investigation conducted on site in Kuwait in December, 1991 after the fire had been put out. It was reported that totally 500 to 850 oil wells were burned up in seven oil fields with a crude oil burning rate of 1 to 6 million barrels per day at its peak. However at most spots in Kuwait, the air pollution during the burning was unexpectedly much less than its environmental standard value though high content was locally detected of floating particulate substances, SO2, etc. Additionally with circumstances of traffic and industrial destructions, the measured data after the fire had been put out gave lower content of SO2 and NO2 than that in the non-polluted regions in Japan. 4 refs., 2 figs., 8 tabs.

  6. Molecular machines in living cells. Seibutsu no bunshi kikai to sono system

    Energy Technology Data Exchange (ETDEWEB)

    Osawa, F. (Aichi Inst. of Tech., Nagoya (Japan))

    1992-12-20

    At first, flagellar motors of bacteria are reviewed as a typical example of molecular machines in living cells. A rotational motor is embedded in the cell membrane at the root of the flagellum. The driving power of the rotation is the flow of hydrogen ion from the inside to the outside of the cell. In a normal state of a bacterium, potential difference of about 0.2 V is produced by the ion pump existing in the cell membrane. A molecular motor of sliding motion of muscle attracts the attention on the relation of the input and output of the molecular motor. The mechanism of the smooth motion without fluctuation in the fluctuated environment and the fluctuated input is unknown. Next, the motion of Paramecium is discussed as an example of a system composed of a number of molecular machines. Paramecium moves to a place of a suitable temperature when placed in a water tank with temperature gradient, however, it does not stop the motion at the place of the suitable temperature and increases a probability to change the direction when leaving, that is it takes a method of indirect probabilistic control. 12 refs., 8 figs.

  7. Energy transmission using microwaves and its possibility. Maikuroha ni yoru energy yuso to sono kanosei

    Energy Technology Data Exchange (ETDEWEB)

    Matsumoto, H.; Shinohara, N. (Kyoto University, Kyoto (Japan))

    1993-09-01

    Transmitting of electric energy in the form of electromagnetic waves is a century-old idea, which has reached its final step of realization at last. This paper describes a review and future prospects on electric power transmitting technologies using microwaves (a wavelength of 12 cm is thought as the most promising candidate). Electric power was transmitted successfully to a flying helicopter in the U.S.A. in 1964. Transmission of 30-kW power was performed in 1975 to a power receiving rectenna (an antenna with microwave receiving rectification circuit) placed 1.6 tm away using a parabola as a transmitting antenna. These studies were carried over to the investigative studies on space power stations (SPS). This is a conception to install a static satellite equipped with a huge solar cell array in the sky of about 36,000 km high to generate power, convert the power to microwaves, and transmit the power of ten million kilowatt class to the ground. A number of results of advanced experiments have been obtained in Japan using rockets or aircraft. 26 refs., 5 figs.

  8. Aircraft and ancillary materials. 2. ; Engine materials. Kokuki to sono shuhen zairyo. 2. ; Engine zairyo

    Energy Technology Data Exchange (ETDEWEB)

    1993-04-05

    This paper summarizes materials for aircraft engines. Jet engines are the mainstream today, which are classified according to their operation process into a turbo jet engine, a turbo prop engine, a turbo shaft engine, and a turbo fan engine. Japan has produced 1543 engines in the past decade, almost all of which are supplied to the Defense Agency. Jet engines use mainly Ni-group heat-resistant alloys, titanium alloys and steels. Improvement of engine efficiency has caused turbine inlet temperatures to rise to 1400[degree]C to 1500[degree]C that give rise to grain boundary cracking. To prevent this, discussions are in progress on monocrystal blades replacing the conventional polycrystal precision casts. Intermetallic compounds including Al/Ti are expected especially of use as jet engine constructing materials from their high melting point and formability. Discussions are preceding on ceramics as to coating them intended of improving heat resistance. Composite materials have a problem of insufficient mechanical strength remaining unsolved. 8 figs., 5 tabs.

  9. Learning automaton newtork and its dynamics. Gakushu automaton network to sono dynamics

    Energy Technology Data Exchange (ETDEWEB)

    Quan, F [Hiroshima-Denki Institute of Technology, Hiroshima (Jpaan); Unno, F; Hirata, H [Chiba Univ., Chiba (Japan)

    1991-10-20

    In order to construct a distributed processing system having learning automata as autonomous elements, a reinforcement learning network of the automaton is proposed and it{prime}s dynamics is investigated. In this paper, it is attempted to add another level of meaning to computational cooperativity by using a reinforcement learning network with generalized leaning automata. The collection of learning automata in the team situation acts as self-interested agents that work toward improving their performance with respect to their individual preference ordering. In the global state space of the network, the case of partially synchronous stochastic process is considered. In this case, the existence of mean field is shown and a reinforcement learning algorithm which can make the dynamics on the average reinforcement trajectory is presented. This algorithm is shown to have a high convergence speed as a result of a simple experiment. 14 refs., 9 figs.

  10. FEM simulation of a sono-reactor accounting for vibrations of the boundaries

    Czech Academy of Sciences Publication Activity Database

    Louisnard, O.; González-Garcia, J.; Tudela, I.; Klíma, Jiří; Sáez, V.; Vargas-Hernandez, Y.

    2009-01-01

    Roč. 16, č. 2 (2009), s. 250-259 ISSN 1350-4177 R&D Projects: GA MŠk 1P05OC074 Institutional research plan: CEZ:AV0Z40400503 Keywords : finite elements * ultrasound * standing waves Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 2.993, year: 2009

  11. Sono-chemical synthesis of cellulose nanocrystals from wood sawdust using Acid hydrolysis.

    Science.gov (United States)

    Shaheen, Th I; Emam, Hossam E

    2018-02-01

    Cellulose nanocrystal (CNC) is a unique material obtained from naturally occurring cellulose fibers. Owing to their mechanical, optical, chemical, and rheological properties, CNC gained significant interest. Herein, we investigate the potential of commercially non-recyclable wood waste, in particular, sawdust as a new resource for CNC. Isolation of CNC from sawdust was conducted as per acid hydrolysis which induced by ultrasonication technique. Thus, sawdust after being alkali delignified prior sodium chlorite bleaching, was subjected to sulfuric acid with concentration of 65% (w/w) at 60 ° C for 60min. After complete reaction, CNC were collected by centrifugation followed by dialyzing against water and finally dried via using lyophilization technique. The CNC yield attained values of 15% from purified sawdust. Acid hydrolysis mechanism exactly referred that, the amorphous regions along with thinner as well as shorter crystallites spreaded throughout the cellulose structure are digested by the acid leaving CNC suspension. The latter was freeze-dried to produce CNC powder. A thorough investigation pertaining to nanostructural characteristics of CNC was performed. These characteristics were monitored using TEM, SEM, AFM, XRD and FTIR spectra for following the changes in functionality. Based on the results obtained, the combination of sonication and chemical treatment was great effective in extraction of CNC with the average dimensions (diameter×length) of 35.2±7.4nm×238.7±81.2nm as confirmed from TEM. Whilst, the XRD study confirmed the crystal structure of CNC is obeyed cellulose type I with crystallinity index ∼90%. Cellulose nanocrystals are nominated as the best candidate within the range studied in the area of reinforcement by virtue of their salient textural features. Copyright © 2017 Elsevier B.V. All rights reserved.

  12. Half century of wind power generation memoir. Part 1; Furyoku hatsuden hanseiki sono omoide. 1

    Energy Technology Data Exchange (ETDEWEB)

    Nakata, H.

    1995-12-01

    This article may be deemed an autobiography of an individual on his development of wind power generation devices. The author began to be interested in electricity while he was a pupil of primary school and during his time of middle school student, when he walked against the strong wind on an embankment, he got an idea to utilize the wind power and succeeded to generate electricity with his handmade wind power generator using a bicycle generator. Afterwards he kept interested in devices utilizing the wind power, in 1973, energy saving was widely promoted due to the oil crises, and taking that opportunity, he established single-handedly a laboratory for development of utilization of the breeze power. Since his retirement from teaching profession in the spring of 1980, he has coped with earnestly the development of wind power generators. He acquired and installed various machine tools for metal works for generators and various machines for wood works for making propellers. In this article, wind power generators using bicycle generators (direct connection type and speed increasing type), small D.C. motors (motors for driving tape recorder, motors for automobile radiator and windshield wiper, etc.) and automobile generators (D.C. generators and alternators) are explained. 11 figs.

  13. Environmental pollution by dioxin and its biodegradation; Dioxin ni yoru kankyo osen to sono biseibutsu bunkai

    Energy Technology Data Exchange (ETDEWEB)

    Nojiri, H.; Yamane, H.; Omori, T. [Tokyo Univ. (Japan)

    1998-10-20

    Polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and coplanar polychlorinated biphenyls (Co-PCBs) exhibit similar chemical and biological properties. Because of their highly toxic activity, the pollution with these compounds, which are called dioxin-related compounds, is one of the most serious environmental problems. In this review, we described the analytical methods of dioxin-related compounds in environmental samples, especially in the exhaust gas from the incineration site of municipal solid waste. In addition, we described the present situation of environmental pollution by dioxin-related compounds, including pollution levels in environmental, human, and food samples, daily intakes, and risk assessment. On the other hand, a number of microorganisms have been reported which are able to degrade dioxin-related compounds including PCDDs and PCDFs. These microorganisms are classified into two groups, lignin-degrading white rot fungi and the dioxin-degrading bacteria. We also described the degradation pathways of dioxin-related compounds in these microorganisms, and their degradative enzymes. 47 refs., 5 figs., 4 tabs.

  14. Environmental impact assessment caused by global warming. Chikyu ondanka no eikyoryo hyoka to sono taisaku

    Energy Technology Data Exchange (ETDEWEB)

    Oshima, K [Geological Survey of Japan, Tokyo (Japan)

    1991-09-01

    This paper describes the considerations on the influence of the global warming on the environment, and the discussions on the measures against the climatic changes. With respect to the environmental effects by the global warming, the considerations were given based on the studies on the effects of mainly the Quaternary climatic changes on the surface sea water temperatures, sea level and animal flocks. If the magnitude of the climatic changes anticipated to occur during the 21st century is lower than that have taken place in the past 10,000 years during which the agricultural production has developed to a full-scale, there would be no fear of drastically changing the ecology on earth. If the estimation of future climatic and environmental changes becomes possible, then four basic positions could be selected for establishing the contermeasure plans. That is, the first is the measures to correspond to birth-rebirth transmigration; the second is the measures to carbon dioxide disposition upon concluding that the cause for the global warming is the atmospheric increase of carbon dioxide concentration, measures for conservation and international cooperation; the third is to deal with the warming environments; and the fourth is the means to reconstruct the earth. While a number of countermeasures may be prepared, Which of them should be selected will be decided by the amount of effects. 15 refs., 6 figs., 1 tab.

  15. Semiconductor relay and its manufacture method. Handotai relay oyobi sono seizo hoho

    Energy Technology Data Exchange (ETDEWEB)

    Nakamura, M

    1993-06-01

    The invention relates to a semiconductor relay in which a light emitting diode and a photovoltaic element are arranged in the opposite positions and connected with a light connection and aims to present a light transmission path to transmit input signals to the light emitting diode to the side of the photovoltaic element with a negligible light loss effectively. The invention presents a semiconductor relay, in which a light emitting diode loaded on the first lead frame and the light receiving part of the photovoltaic element to drive a MOSFET element loaded on the second lead frame and acting as a switch element are connected through an insulator tube with an opaque outer wall, and the interior of the insulator tube is filled with a transparent insulating filler, so that the invention affords a light transmission path without light leakage from the interior of the opaque insulator tube and with the stability in the form and no light loss. 3 figs.

  16. Supplymentary type semiconductor device and manufacturing method. Soho gata handotai sochi oyobi sono seizo hoho

    Energy Technology Data Exchange (ETDEWEB)

    Uno, Masaaki

    1990-01-08

    As a supplementary type semiconductor device has a complicated structure, it is extremely difficult to construct it in a three dimensional structure. This invention aims to reduce its occupying area by forming p-channel and n-channel transistors in a solid structure; moreover in an easy method of production. In other words, an opening is made in the element-forming region of a semiconductor substrate, forming a gate-insulation film on each of the p-type and n-type semiconductors which are exposed on the two facing surfaces; on it formed a gate electrode; p-type semiconductor surface is used as a channel domain; a drain region of n-channel transistor on one surface and a source region on another surface; the n-type semiconductor surface corresponding to the gate electrode is used as a channel region; a source region of the n-channel transistor is formed on the same surface and the drain region on the substrate surface. Occupied area is thus made less and the production gets easier. 20 figs.

  17. Utilization as solid fuel and its physicochemical characteristic of hydroponic cultured plants for wastewater treatment; Suiko saibai shokubutsutai no kotai nenryoka to butsurigakuteki tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Inoue, M; Hirano, K [Kanagawa Environmental Research Center, Kanagawa (Japan); Inamori, Y [National Inst. for Environmental Studies, Tsukuba (Japan)

    1996-10-10

    A treatment of the wasted flower plants used for the waste water treatment process by the indoor drying and pressing method was studied for their effective reuse as columnar solid fuel. Three kinds of wasted flower plants were processed for making samples by indoor drying method for about two months. The samples which were chop plants about 10cm long, half powdery ones and powdery ones were made into the columnar solid fuels under 1-5 t{center_dot}cm{sup -2} pressure. According to the drop`s strength test for the solid fuels, it was investigated that they lost their physical strength rapidly in proportion to the elapsed time. The solid fuel made of powdery processed plants particularly lost its strength most rapidly. In the case of solid fuels made of chops, when they were pressed by the method that the trunk and the branches filled into the press`s vessel in the same direction against the press`s one, their physical strength were maintained for a long time. Furthermore, the form of solid fuels processed by this method looked like keeping their original one for a relatively long term. It was found that their combustible efficiency was excellent because the combustible calorie of the wasted plants ranged from 3,600 cal{center_dot}g{sup -1} to 3,800 cal{center_dot}g{sup -1}. 18 refs., 11 figs., 2 tabs.

  18. Continuous measurement of electrical characteristics in plants. 3. Shokubutsu seitai no denki tokusei sokuteiho. 3. ; Suikoeki pH chosei heno tekiyo

    Energy Technology Data Exchange (ETDEWEB)

    Sekiyama, T; Haniyu, H; Saiki, H

    1989-09-01

    Controlling pH of nutrient solution and keeping the other conditions unchanged, measurements of variation in electric potential difference between leaf and hypocotyl of a bush bean plant was performed for about seven days. Silver electrodes 0.3mm in diameter were glued on the surface of the plant using conductive paste prepared by dissolving gelatine in Ringel {prime} s solution. The results obtained are summarized as follws: first, when pH of the solution is suddenly increased or decreased, the potential of leave becomes high or low with respect to that of hypocotyl respectively; second, the variation in potential difference between them is affected by the rate at which pH of the solution is adjusted, although the total variation of pH is controlled to be the same, and in particular by mild adjustment (0.02 - 0.05pH/min) it is reduced to 1/2 - 1/4 of that produced by sudden change; third, abrupt change in pH of the solution cause to the plant the temporary suppression of its water absorption having a duration of 7 - 15 minutes. A short account is given of a non-contact type measurement of bioelectric potential performanced by making use of a Faraday {prime} s cage. 11 refs., 12 figs.

  19. Analysis of output characteristics of PV modules under natural sunlight; Shizen taiyokoka ni okeru taiyo denchi module shutsuryoku tokusei no kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Murai, Y.; Igari, S. [Japan Quality Assurance of Organization, Tokyo (Japan)

    1997-11-25

    The paper measured current/voltage characteristics of various PV modules under natural light and analyzed various characteristics such as generated output and module power generation efficiency. In the experiment, installing various PV modules at the solar techno center located at north latitude 34.7deg and east longitude 137.6deg, measurement was made by I-V curve tracer, pyranometer, and thermocouple buried on the module back. As a result, the following were confirmed: As to the monthly mean power generation efficiency, the crystalline system is lowest in summer and highest in winter, and the amorphous system highest in summer and lowest in winter. Concerning the power generation efficiency and illuminance, the gap of power generation efficiency between at high illuminance and at low illuminance is large in the crystalline system and small in amorphous system. Relating to the azimuth angle of module installation and the generated output, the installation inclined 15deg angle west in summer and 15deg angle east in fall/winter generates more power in the crystalline system. On the contrary, the installation on the south face generates more power in the amorphous system. 4 refs., 8 figs., 3 tabs.

  20. Corrosion characteristics of thermal sprayed coating of stainless alloys in chloride solution; Taishoku gokin yosha himaku no enkabutsu yoekichu ni okeru fushoku tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, T. [Ajinomoto Co. Inc., Tokyo (Japan); Ishikawa, K. [Tokyo Metallikon Co. Ltd., Tokyo (Japan); Kitamura, Y. [Kitamura Technical Consultant Office, Kanagawa (Japan)

    1994-12-15

    With an objective to develop a thermal sprayed coating of environment interruption type that can be sprayed at sites, electrochemical discussions, SEM observation, and EPMA surface analysis were performed on corrosion characteristics in chloride solution of coatings of SUS 304, 316 and Hastelloy C thermally sprayed onto test pieces made of structural steel SS400, as well as the effect of improvement in corrosion resistance by means of a coating reforming treatment. The following conclusions were obtained: the degradation in corrosion resistance of the coatings is attributable to increase in anodic solubility due to appearance of innumerable crevices as a result of deposited particles forming porous structure and due to drop of Cr content in the matrix caused by generation of oxides on the surface of the crevices, by which the corrosion progresses in the form of crevice corrosion; and denseness of the passive coating is lost on the surface of the deposited particles, accelerating the cathodic reaction. A suitable means that could be used practically in chloride solution would be a method to use a material with less crevice susceptibility such as Hastelloy C as a base material, and seal the crevice structure with epoxy resin, etc. 7 refs., 10 figs., 3 tabs.

  1. Aerodynamic characteristics of a wing near its tip using panel method. Panel ho ni yoru tandokuyoku yokutan fukin no kuryoku tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Choi, J [Nagoya University, Nagoya (Japan); Sugiyama, Y [Nagoya University, Nagoya (Japan). Faculty of Engineering

    1992-01-05

    The study described in this paper is intended to evaluate the aerodynamic characteristics of a turbo machine wing or an aircraft wing near its tip, using the panel method. The paper describes the case of a rectangular wing with a large aspect ratio. The introduced linear simultaneous equation was solved using a computer, and compared with the experimental result. The result may be summarized as follows: The distribution of pressure on the wing near its tip using the panel method takes the same shape as that for the experimental result; the negative pressure calculated close to the wing's trailing edge near the wing tip is a result of a three-dimensional effect of the flow along the wing width; the calculation and the experiment showed an increase in local lift coefficient and locally induced resistance coefficient in the vicinity of wing tip; the speed component in the y'' direction explains the structure of the wing surface velocity forming wing backwash vortex given by the lift linearity theory; and the result of calculation on the pressure distribution in the wing chord direction near the wing tip is very close to the experimental result except for the wing flank in the close vicinity of the wing tip upstream of the wing chord middle point. 11 refs., 13 figs.

  2. Effect of burn-off on physical and chemical properties of coal char; Gas ka shinko ni tomonau sekitan char no tokusei henka

    Energy Technology Data Exchange (ETDEWEB)

    Yamada, T.; Tamura, K.; Hashimoto, H.; Funaki, M.; Suzuki, T. [Kitami Institute of Technology, Hokkaido (Japan)

    1996-10-28

    For high-efficiency coal gasification, investigations were given on effect of coal chars with different conversion rates on coal gasification reactivity. In coal gasification, reactivity of char after pyrolysis governs the efficiency. The reference char conversion in CO2 gasification of coal (weight loss) changes linearly in the initial stage of the reaction, but the reactivity declines as the end point is approached. Char surface area is as large as 400 m{sup 2}/g in the initial stage with the conversion at 20%, but it decreases in the final stage. This phenomenon relates closely with changes in pore size and crystalline structure. Change in the Raman value R which shows incompleteness of char graphite structure and amorphous carbon ratio suggests that an active portion with high reactivity is oxidized preferentially, and a portion with low reactivity remains finally. Minerals in coal are known to accelerate the gasification. However, their catalytic effect is related with chemical forms, and complex as they may change into inactive sulfides and silicates under severe reaction conditions. Change in forms of calcium compounds may also be involved in decline of the reactivity in the latter stage. 8 refs., 4 figs.

  3. Influence of molybdenum on hardenability of destabilized high chromium cast irons. Ko kuromu chutetsu no netsushori tokusei ni oyobosu moribuden no eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Kuwano, M. (Ube, Collete of Technology, Yamaguchi (Japan)); Ogi, K. (Kyushu University, Fukuoka (Japan). Faculty of Engineering); Sawamoto, A. (Yamaguchi University, Yamaguchi (Japan))

    1991-07-25

    Alloy elements are added to compensate for reduction in hardenability of high chromium cast iron as a result of destabilization heat treatment. With the purpose of investigating the influence of the added elements, this paper describes investigations made on effects of Mo and destabilization heat treatment conditions on martensite transformation , eutectoid transformation and base hardness, using Fe-Cr-C-based alloy containing C at 1.6-3.6%, and Cr at 6.6-26%. The main results obtained are as follows: Mo and Cr had the distribution coefficient for initial crystal austenite is smaller than one and were microscopically segregated in the dendrite base; the solute element distribution in the base is homogenized as a result of the long-time destabilization heat treatment while the Cr and C concentrations reduce largely, and the Mo concentration increases slightly; Mo has little influence on the Ms point, and reduces with the smaller the Cr/C ratio and the higher the retention temperature; and the base hardness corresponds well to a CCT diagram. 14 refs., 11 figs., 1 tab.

  4. Luminescence property and lowest excited singlet state level of various carotenes; Shuju no karochinrui no hako tokusei to saitei reiki -juko jotai jun'i

    Energy Technology Data Exchange (ETDEWEB)

    Ito, T. [Miyagi Midical Univ., Miyagi (Japan)

    2000-01-01

    Specification of the lowest excited singlet state (S{sub l}) of the butadiene which is the simplest {pi} electron conjugated system molecule has not sufficiently clarified at present. Recently, Andersson et al. found the weak light emission which was considered to be the S{sub 1} fluorescence in a near infrared region in a room temperature solution of {beta}- carotene (n=11), and specified the S{sub 1} level in 14,200{+-}500cm {sup -1}. And, Fujii et al. reported the S{sub 1} fluorescence of spheroidine (n=10). In very recent, Christensen et al. measured the comparatively clear fluorescence spectrum of carotenes n=5 to 11 separated by HPLC in EPA glass at 77K, and systematically examined the unique luminescence property observed in polyene. Christensen et al. issued the warning for the rough conventional method that the S{sub 1} level was estimated from the S{sub 1} fluorescence lifetime of the polyene molecule using the comprehensive energy gap law, because the ratio of quantum yield of the S{sub 1} and S{sub 2} fluorescence is different by the substituent type of the polyene end even if n is same. (NEDO)

  5. Improvement performance and emissions in a diesel engine dual-fueled with natural gas; Tennen gas dual fuel diesel kikan no seino haishutsu gas tokusei no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Nakayama, S; Okamoto, T; Kusaka, J; Daisho, Y; Kihara, R; Saito, T [Waseda University, Tokyo (Japan)

    1997-10-01

    This paper deals with a study on combustion and emission characteristics of a direct injection diesel engine dual-fueled with natural gas. Dual fueling systems tend to emit high unburned fuel especially at low load, resulting in a decreased thermal efficiency. This is because natural gas-air mixtures are too lean for flame to propagate under low load conditions. Intake charge heating and uncooled EGR are very useful to improve emissions and thermal efficiency at low load. Such favorable effects are supported by NO kinetic simulations. 2 refs., 13 figs.

  6. Characteristics of combined levitation and guidance EDS maglev system. Fujo to annai wo ken prime yosuru yudo hanpatsu jiki fujo no tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Fujiwara, S; Fujimoto, T [The Railway Technical Inst., Tokyo (Japan)

    1992-05-20

    It is very important to reduce magnet resistance that is a kind of running resistance so as to reduce the energy of running, coils on the ground and capacity of the electric equipments in the EDS maglev system. There is a coil arrangement method that arranges the levitation coils on the side walls and is possible to reduce the magent resistance. According to this method, the coils are arranged in two stages: upper and lower stage and connected in opposite direction. The levitation coils are not electric conductive when the central height of the supper electric coil is agree with the central height of the levitation coil. In the present paper, the working principle of the combined levitation and guidance system, according to which the levitation coils are arranged on the side walls, is explaned, the basic characteristics are clarified by the numerical examples and confirmed by the running tests. Based on the results of the study, it is possible to make more detail examination from now on about the combined levitation and guidance system. 6 refs., 13 figs., 4 tabs.

  7. Achievement report for fiscal 1984 on Sunshine Program. Basic research on coal type and gasification characteristics; 1984 nendo tanshu to gas ka tokusei no kiso kenkyu seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1985-03-01

    The study of pressurized fluidized gasification of coal chars started in fiscal 1975, and a 0.2t/d unit was in operation until fiscal 1979. Since fiscal 1980, a 1t/d unit has been in operation. In fiscal 1984, an entrained bed gasification furnace was constructed, capable of high-temperature gasification of various coals, and it is now undergoing a test operation. This report consists of pressurized gasification tests for coal char, the result of a study on the effect of coal type on the char gasification reaction rate, and the result of experiments on the treatment of coal liquefaction residue, all accomplished in the 1t/d gasification unit. For the investigation of the effect of coal type, chars of 13 types of coals are subjected to reaction tests in the carbon dioxide gas, and weight reduction rates and changes in residue surface areas are determined while reaction is under way. The results are analyzed and parameters are made clear that enable a quantitative assessment of the effect of coal type on gasification reaction rates. Pulverized grains and coal liquefaction residue are blended and gasified in the fluidized bed in the presence of oxygen and steam. As the result, a gas capable of 2,000kcal/Nm{sup 3} containing 30% hydrogen and 25% carbon monoxide is acquired, when catalyst grains in the residue are segregated. (NEDO)

  8. Study on properties of mortar using silica fume and ground blast furnace slag. Silica fume oyobi koro slag funmatsu wo mochiita mortar no tokusei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Shiiba, H; Honda, S; Araki, A [Fukuoka University, Fukuoka (Japan). Faculty of Engineering

    1992-09-01

    The effect of silica fume and ground blast furnace slag in concrete on the content of superplasticizer, and dynamic properties of hardened mortar with such admixtures were studied experimentally. Although the dependence of a flow value on the superplasticizer was dominated by kinds of superplasticizers, blast furnace slag enhanced the flow value resulting in a high fluidity. Adsorption of superplasticizers onto admixtures was dependent on kinds of superplasticizers, and adsorption onto blast furnace slag was 1.3-2 times that onto normal Portland cement (NPC). The compressive strength of mortar increased by mixing admixtures, while the bending strength was enhanced only by mixing silica fume. Mixing mortar was lower in dynamic elastic modulus than NPC mortar at the same compressive strength, and the velocity of supersonic wave in mortar was scarcely affected by mixing. 11 refs., 14 figs., 3 tabs.

  9. Analysis of crashes using FE vehicle models. Relations between vehicle types and crash characteristics; Yugen yoso model wo mochiita sharyo no shototsu kaiseki. Sharyo type to shototsu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Takatori, O. [Japan Automobile Research Institute Inc., Tsukuba (Japan)

    2000-01-01

    The objective of this study is to analyze the crash characteristics of vehicles under the condition of real-world accidents. This paper pays attention to the differences in the crash characteristics of a vehicle colliding with a vehicle which is a different type. Vehicles on the market can be divided broadly into two vehicle structures, monocoque structure and frame structure. Monocoque structure is mainly used for passenger vehicles and frame structure is for recreational vehicles (RV). In recent years, RV has been a large seller on the market. So accidents between passenger vehicles and a RVs occur frequently. The analysis of experimental data and computer simulation, which is predicated on the experimental data, was carried out for this study. In the analysis of experimental data, barrier force data from the New Car Assessment Program (NCAP) were analyzed. The FE passenger vehicle model which is based on systematic validation tests was used for the computer simulation of car-to-car collisions. (author)

  10. Formation of secondary products in water purification. ; Charactarization of chlorination by-products. Josui shori ni okeru fukuseiseibutsu. ; Enso shori ni yoru shodoku fukuseiseibutsu no seisei tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Aizawa, T [The Inst. of Public Health, Tokyo (Japan)

    1993-12-10

    Chlorination of drinking water is an inevitable process for the purification of drinking water. It has been made clear that injected free chlorine reacts with organic matter in water to produce chlorinated by-products. Many of those compounds are toxic, and studies have been made on the international water quality standard. Water quality standard has been revised also in Japan. The sources of organic matter which is the cause for production of chlorinated by-products vary according to the kinds and conditions of the water source for drinking water. Removal of precursors in the original water, removal of by-products, and change in the disinfection system with alternate disinfectant for chlorine are among the measures for decreasing chlorinated by-products at water purification plants, but the first one is employed as the basis method. It is expected that more severe regulation may be imposed on the quality of the water source for drinking water, and more strict oxidation and disinfection systems is inevitable for water management based on the new water quality standard. 10 refs., 5 figs., 2 tabs.

  11. DC-transport properties of QMG(reg sign) current-limiting elements; QMG(reg sign) genryusoshi no chokuryutuden tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Morita, M.; Tokunaga, Y. [Nippon Steel Corporation, Tokyo (Japan); Miura, D.; Ito, D. [Tokyo Metroporitan University, Tokyo (Japan)

    1999-11-25

    The V-I properties of YBCO bulk superconductor (QMG(reg sign) :YBa{sub 2}Cu{sub 3}O{sub 7-x} single-crystal containing Y{sub 2}BaCuO{sub 5} particles) were measured using a single rectangular pule current at 77 and 87 K to obtain basic data for super-normal transition. Because of its high J{sub c} property, QMG is a promising bulk material for resistive-type HTC-FCL application. I-shaped QMG rods having cross sections of 0.5 x 1.0 mm were prepared to measure voltage due to pule current. The plots of ln V vs ln I yielded a straight line with a gradient ranging from 5 to 7. By changing the amplitude and length of pulses, the time from the start of sending electricity till the occurrence of quenching was obtained for various amplitudes of pulse current. In this experiment, it is considered that quenching did not occur in the whole rod but only in a small part of it. (author)

  12. Performance and exhaust emissions in a natural-gas fueled dual-fuel engine; Tennen gas dual fuel kikan no seino oyobi haiki tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Shioji, M.; Ishiyama, T.; Shibata, H. [Kyoto Univ., Kyoto (Japan). Inst. of Atomic Energy; Ikegami, M. [Fukui Institute of Technology, Fukui (Japan). Faculty of Engineering

    2000-07-25

    In order to establish the optimum fueling in a natural gas fueled dual fuel engine, tests were made for some operational parameters and their combination on the engine performances and the exhaust emissions. The results show that the gas oil quantity should be increased and gas oil injection timing should be advanced to suppress unburned hydrocarbon emission at middle and low output range, while the quantity should be reduced and the timing should be retarded to avoid onset of knock at high loads. The unburned hydrocarbon emission and the thermal efficiency are improved at the same load avoiding too lean natural gas premixture by restriction of intake charge air. However the improvement is limited because the ignition and initial combustion of pilot diesel fuel is deteriorated when the cylinder pressure is excessively lowered by throttling. The increase in pilot gas oil amount is effective for low-load operation and the adequate combination of throttle control and equivalence ratio ensures low hydrocarbon emission and the thermal efficiency comparable to diesel operation. (author)

  13. Flow and mixing characteristics in a stirred tank with dual wide paddles; 2 dan waido padoruyoku tsuki kakuhan sonai no ryudo{center{underscore}dot}kongo tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Takata, Kazutaka; Ito, Hisayoshi; Kikuchi, Masahiko; Okamoto, Yukimichi [Shinko Pantec Corp., Hyogo (Japan)

    1999-03-10

    Flow structure and mixing characteristics in a stirred tank with dual wide paddle impeller were examined using computational fluid dynamics (CFD). CFD was conducted using analysis code for fluid flow, and velocity measured by laser doppler velocimeter, power consumption and mixing time were used for evaluating computed results. The computed flow field and power consumption agreed well with themeasured values within 5 % mixing process well agreed with the observations. Since the computed flow pattern and mixing process agreed well with the measured values, computed results are useful for evaluating complex flow field in a stirred tank. A detailed investigation using computed results are useful for evaluating complex flow field in a stirred tank A detaile investigation using computed results shows that dual cross-installed wide paddle impellers lead to superior mixing performance in the stirred tank, and pressure gradient between upper and lower paddles is found to be the factor that promotes fluid transport in the tank, which is never the case when the dual wide paddles are installed in the same plane. (author)

  14. Transient heat characteristics of water-saturated porous media with freezing; Toketsu wo tomonau gansui takoshitsu sonai no hiteijo netsu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Sasaki, A [Akita National College of Technology, Akita (Japan)

    1998-02-25

    Analytical and experimental investigations were performed to examine the transient heat characteristics of water-saturated porous media with freezing. As a physical model, a two-dimensional vertical cavity was considered. One vertical wall was abruptly cooled below the fusion temperature. Other three walls were thermally insulated. Three different sizes of glass, and iron, alumina and copper beads were used as the porous media in this study. The cold energy stored up in the porous media and the average thickness of frozen layer were measured in the experiments. Comparisons of the analytical results with the experimental ones were made, and the effects of Darcy number, Stefan number and modified Prandtl number on the transient heat characteristics were discussed. The dimensionless equations for predicting the averaged frozen layer thickness and the stored cold energy were obtained as a function of various dimensionless parameters. 8 refs., 16 figs., 1 tab.

  15. Water infiltration and heat transfer in one dimensional unsaturated packed beds; Fuhowa ryushi sonai no ichijigen suibun nagare to dennetsu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Aoki, K; Akahori, M; Hattori, M [Nagaoka University of Technology, Niigata (Japan); Shiraishi, N [Toshiba Corp., Tokyo (Japan)

    1998-05-25

    Water and heat transport in unsaturated packed beds due to supplying hot water have been investigated experimentally and theoretically. Using various sizes of glass beads, capillary pressure and permeability in packed beds were measured in unsaturated beds. The distributions in water saturation and temperature were predicted for one dimensional packed bed, based on a model assuming local thermal equilibrium among water, gas and particles at any specific space. The predicted temperature distributions were compared with the experimental results obtained using various glass sizes. In layered packed beds, water saturation becomes discontinuous at the interface of two layers because of the difference of the water characteristics between two beds. Water penetrates faster in coarse-over fine-textured profile compared with in fine-over coarse-textured profile. Similarly, the temperature rises faster in former profile under the same supplied heat quantity. 11 refs., 13 figs., 1 tab.

  16. Efflux Performance of Submicron Particles in Packed Bed under Periodic Pressure Conditions; Shuki atsuho ni yoru juten sonai sabumikuron biryushi no ryushutsu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Ping, Z; Iritani, E; Murase, T [Nagaya Univ. Nagoya (Japan). Department of Chemical Engineering

    1997-09-01

    Permeation experiments of ultrapure water were conducted under periodic pressure conditions using a packed bed obtained by dispersing submicron particles of polymethyl methacrylate (PMMA) uniformly into a packed bed of particles of White Alundum. It is clearly demonstrated that washing performance under periodic pressure conditions where the permeation pressure is applied periodically is improved dramatically, compared with that under constant pressure conditions. It is also shown that the effect of periodic pressure operation is especially noticeable in the initial stage of the pressurizing period, and that a pressurizing time smaller than 2 min is very effective under conditions examined in this study. 4 figs.

  17. Ground characteristics at observation site of strong motion in Hachinohe Inst. Tech. Hachinohe, Aomori; Hachinohe Kodai konai ni secchishita kyoshin kansokuten no jiban tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Sakajiri, N [Hachinohe Institute of Technology, Aomori (Japan)

    1997-10-22

    Discussions were given on ground structures in the city of Hachinohe and vibration characteristics of the grounds during earthquakes. In order to identify ground structures and vibration characteristics thereof in the city of Hachinohe, strong motion seismographs were installed in five locations of the city and in the Tohoku University. At the Hachinohe Institute of Technology, strong motion seismographs were installed underground (-65 m) and on the ground, where S-wave logging experiments were performed using the plank hammering method. The records therefrom were used to estimate Q values, and the Q values were used to compare the computed ground amplification characteristics with the spectral ratio of seismic waves in and on the ground. The analysis has conducted the Q value estimation on each bed from a depth greater than 4 m, whereas relatively reasonable values were derived only from sections from 4 m to 13 m, and other sections showed no stable values. According to the result of observations derived from the seismographs installed in and on the ground, the maximum amplitude of the ground surface seismograph was found about five times greater than that of underground in the NS components, about eight times in the EW components, and about six times in vertical movements. The result indicates that the amplitude is obviously affected greatly by the characteristics of the ground. 4 refs., 8 figs., 1 tab.

  18. Crack wave propagation along fracture with an induced low-velocity layer; Teisokudo no chika kiretsu zone wo denpasuru kiretsuha no bunsan tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Nagano, K [Muroran Institute of Technology, Hokkaido (Japan)

    1997-10-22

    A study has been performed on underground cracks working as a geothermy reservoir layer, with respect to characteristics of elastic waves propagating with their energy concentrated on a boundary between rocks around the cracks and fluid in the underground cracks, or `crack waves`. The study has modeled a multi-crack reservoir layer according to the three-layer structure of the fluid layer and low-velocity solid layers around the former layer, whereas crack waves propagating therein were discussed for their dispersion characteristics. As a result of discussions, a guideline to the crack wave measurement at actual fields was put together as follows: because the low-velocity layer affects the dispersion characteristics of the crack waves, the structure and characteristics of the multi-crack reservoir layer may possibly be evaluated by measuring the velocity of the crack waves; evaluating the low-velocity layers requires proper selection of frequency of the crack wave to be measured; for example, at the Higashi Hachimantai field, a crack wave of several hundred hertz must be analyzed; and thickness of the low-velocity layers around main cracks, which can be estimated from the velocity of the crack wave is two meters at the greatest. 6 refs., 3 figs., 2 tabs.

  19. Output characteristics of 40 kW photovoltaic power generation system in ICT; Ibaraki kosen ni okeru 40 kW taiyoko hatsuden shisutemu no shutsuryoku tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Sekiguchi, N. [Ibaraki National College of Tech., Ibaraki (Japan); Tani, T. [Science University of Tokyo, Tokyo (Japan)

    1999-11-25

    The photovoltaic power generation system consists of photovoltaic array and power conditioner of the utility connected system. The photovoltaic array parallelly constitutes 18 serial 30 of the modules of 540 sheets, and there is the generating capacity of largest 40 kW. The power conditioner uses 10 kW four units, and it is tracking with function of the maximum output point. This report examined the unconformable rate of photovoltaic array maximum output operating voltage, current and power in simulation and power conditioner input. (author)

  20. Oxidation characteristics of Ti-14Al-21Nb alloy at high temperature in purified oxygen; Ti-14Al?-21Nb gokin no sansochu ni okeru koon sanka tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Akai, M; Taniguchi, S; Shibata, T [Osaka University, Osaka (Japan). Faculty of Engineering

    1994-10-20

    The Ti-14Al-21Nb alloy called Super {alpha}{sub 2} is an alloy which has been improved of plastic transformation ability by adding Nb into Ti3Al with high specific strength, and is used for member materials in aircraft engines. In order to identify its oxidation characteristics, this paper discusses the oxidation characteristics under purified oxygen and atmospheric pressure in temperatures ranging from 1000 K to 1300 K. The experiment made a button-formed ingot with a diameter of 50 mm and a thickness of about 10 mm by melting and thermal refining, and used a thermobalance. Main conclusion thus obtained may be summarized as follows: the amount of increase due to oxidation after 100 ks oxidation at 1000 K is very small; oxidation between 1100 K and 1200 K follows nearly the parabolic rate laws; the scale consisted mainly of rutile, but a thin alumina concentration layer is formed; Nb is concentrated in the rutile-alumina mixed layer, and local fracture and regeneration are repeated at temperatures higher than 1300 K. 21 refs., 8 figs., 2 tabs.

  1. Characterization of algae removal in a fluidized bed biofilm reactor system for lake water treatment; Kokisei ryudosho seibutsu rokaho ni yoru kosuichu no sorui jokyo tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Tanaka, T.; Tsuzuki, K.; Nishijima, N.; Takagi, T. [Hitachi, Ltd., Tokyo (Japan); Terazono, K. [Water Resources Environment Technology Center, Tokyo (Japan)

    1998-04-10

    This paper describes a pilot plant study on algae removal of a fluidized bed biofilm reactor system for lake water treatment. The system does not need backwashing because the fluidized bed suffers no clogging. Moreover, the system uses dissolved oxygen in influent water for aerobic biological treatment without aeration equipment. Thus, this system is a low energy and easy maintenance way to purify eutrophic lake water. The system was operated continuously at a flow rate of 1500 m{sup 3}/d{sup 1} for 9 months at Tsuchiura Port in Lake Kasumigaura. In this study, chlorophyll-a and dissolved oxygen in both influent and effluent water were monitored continuously. In summer (August to September) when water bloom occurred, the average removal efficiency of chlorophyll-a was 64% at the average influent chlorophyll-a concentration of 137.8 {mu}g/l{sup 1}. During the total experimental period (9 months), the average daily amount of removed chlorophyll-a was 40.3 g/d{sup 1} at the average influent chlorophyll-a concentration of 89.5 {mu}g/l{sup 1}. By analyzing the relationship between the removed chlorophyll-a and the consumption of dissolved oxygen, it was estimated that almost all of algae trapped in the reactor was degraded biologically. 20 refs., 12 figs., 2 tabs.

  2. Estimation of tire characteristics by concerning test data of vehicles; Jidosha no senkai shiken data ni yoru dire tokusei no suisan

    Energy Technology Data Exchange (ETDEWEB)

    Nakamura, M; Sekine, T; Nagae, H [Nihon University, Tokyo (Japan)

    1997-10-01

    To study and/or develop the vehicle motion of a braking in turns theoretically, the cornering characteristics of the tire under the action of braking forces must be required. On the other hand, such data are very few to be published and also there be few tire testing machine to be able to use. The authors tried to derive such data from the vehicle behaviors in steady turns and braking in turns. Because each wheel loads are unknown factors, the two wheeled vehicle model are employed in analysis. The methodology of analysis and the reasonable results are presented in this paper. 5 refs., 10 figs., 2 tabs.

  3. Experimental analysis of the structure attenuation characteristics on engine noise by pseudo cylinder pressure excitation; Giji tonaiatsu kashin ni yoru engine kozo no soon tokusei hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Ozawa, H; Nakada, T [Isuzu Advanced Engineering Center, Tokyo (Japan)

    1997-10-01

    The engine structure attenuation has been experimentally analyzed by the newly developed in-cylinder excitation system. It can reproduce the complete cylinder pressure in non-running engine conditions by adopting the hydraulic and the piezoelectric actuator. The structure attenuation measured in this system has a good coincidence with the ones measured in actually engine operating conditions, meanwhile the current method, which applied only high frequency components as the excitation pressure, was shown to have the unsatisfied agreement. As a result, the proposed system has been concluded to be very useful to estimate the engine noise characteristics in non-running conditions. 4 refs., 11 figs., 1 tab.

  4. Conduction and TSC properties of LB films adsorbing cyanine dyes; Cyanine shikiso kyuchaku LB maku ni okeru denki dendo oyobi netsushigeki denryu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Shinbo, K.; Kato, K.; Kaneko, F.; Kobayashi, S. [Niigata University, Niigata (Japan)

    1995-05-20

    The electric properties were investigated for phosphatidic acid (PA) LB films adsorbing cyanide dyes (NK-3) with sandwich electrodes. PA LB adsorbing the dyes and the monolayers of Cd salt without the dyes are deposited using subphases, containing various concentrations of the dyes and containing CdCl2 instead of the dyes, respectively. Conduction currents are measured at room temperature for the PA LB film devices. Increases in the conduction currents are observed in the LB films containing the dyes. Furthermore, the conduction currents remarkably increase using the Au upper electrode. The current(I) vs. voltage (V) properties nearly follow the Poole conduction, log(I)-V. Therefore, the conduction currents are very complicated and are thought to be due to composite mechanisms in the film and at the interface. TSC measurements are used to examine the dipolar polarizations in the PA LB films, in the temperature region between 150 K and 300 K. Remarkable increase of TSCs are observed above 260 K for the devices containing the dyes. The TSCs are caused by the dipolar polarizations, and increase with the quantity of the dyes contained in the LB devices and/or aggregations of the dyes. The results are useful for applications of ultrathin film devices in the future. 16 refs., 11 figs., 3 tabs.

  5. Shunt and series resistance of photovoltaic module evaluated from the I-V curve; I-V tokusei kara hyokashita taiyo denchi no shunt teiko to chokuretsu teiko

    Energy Technology Data Exchange (ETDEWEB)

    Asano, K; Kawamura, H; Yamanaka, S; Kawamura, H; Ono, H [Meijo University, Nagoya (Japan)

    1997-11-25

    With an objective of discussing I-V characteristics when a shadow has appeared on part of a photovoltaic module, evaluations were given as a first stage of the study on saturation current, shunt resistance and series resistance for the solar cell module. As a result of measuring change in amount of power generated in a sunny day with a shadow appearing over the solar cell module, reduction in power generation capability of about 23% was verified. In other words, the I-V characteristics of the solar cell module change largely because of existence of the shadow caused on the module. The I-V characteristics curve may be expressed and calculated as a function of the shunt resistance and series resistance. By curve-fitting measurement data for a case of changing insolation without existence of partial shadow, values of the shunt resistance and series resistance were derived. As a result, it was found that the calculations agree well with measurements. It was made also clear that each parameter shows temperature dependence. 6 refs., 10 figs., 1 tab.

  6. Fundamental analysis of thermally regenerative fuel cell utilizing solar heat; Taiyonetsu wo riyosuru netsu saiseigata nenryo denchi no kiso tokusei no kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Ando, Y; Tanaka, T; Takashima, T; Doi, T [Electrotechnical Laboratory, Tsukuba (Japan); Aosawa, T; Kogoshi, S [Science University of Tokyo, Tokyo (Japan)

    1997-11-25

    Study was made on a thermally regenerative fuel cell using solar heat. The thermally regenerative fuel cell was devised which is composed of 2-propanol liquid-phase endothermic dehydrogenation at nearly 100degC, and acetone liquid- phase exothermic hydrogenation at nearly 30degC as reverse reaction. This low-temperature dehydrogenation can relatively easily utilize a flat solar heat concentrator. 2-propanol dehydrogenation generates acetone and hydrogen. Generated acetone generates electric power in hydrogenation, generating propanol. This propanol regenerates acetone and hydrogen in dehydrogenation. The activity of Ru and Pt composite catalyst was considerably higher than that of Ru or Pt single catalyst. The activity was also higher in carbon felt or carbon cloth carrier than carbon plate carrier. The open circuit voltage of the fuel cell was estimated to be 110-120mV, nearly consisting with theoretical values. Short circuit current was also estimated to be 9-11mA, suggesting reduction of its internal resistance as an important subject. 4 refs., 5 figs., 2 tabs.

  7. Generation characteristics of photovoltaic power generation equipment at TEPCO R and D center; Gijutsu kaihatsu center taiyoko hatsuden setsubi no hatsuden tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Amano, K; Natori, K [Tokyo Electric Power Co. Inc., Tokyo (Japan)

    1997-11-25

    Solar battery arrays are installed at different tilt angles for actual measurement in an experiment conducted by TEPCO (Tokyo Electric Power Company, Inc.) Research and Development Center for the examination of their power generation characteristics. Arrays of polycrystalline silicon solar battery modules are positioned facing a direction +7 degrees swung from the south on the Center rooftop and verandah, and they are installed at tilt angles of 0, 30, 60, and 90 degrees. An analysis of system characteristics is conducted, and findings mentioned below are obtained. In fiscal 1996, the highest utilization factor of a yearly average of 11.3% is attained with the ones tilted at 30 degrees. As for the utilization factors at the other angles, they are 10.2% at 60 degrees, 8.8% at 0 degrees, and 8.0% at 90 degrees. The integrated design coefficient remains approximately constant irrespective of the different tilt angles of 0, 30, and 60 degrees. The overall design coefficient of the 90 degree-tilted array installed on the verandah is found to be 0.75, which is higher than those exhibited by the others. Appropriate routes of wirings for modules should be worked out to avoid the ill effect of the shadows of steel towers. 2 refs., 11 figs.

  8. Concentration characteristics and cell arrangement in luminescent concentrator PV modules; Keiko shukogata taiyo denchi module no cell haichi to shuko tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Inamura, A [Science University of Tokyo, Tokyo (Japan); Sakuta, K [Electrotechnical Laboratory, Tsukuba (Japan)

    1997-11-25

    A luminescent concentrator PV module requires no tracking equipment and can use scattered light. A mini PV module was prepared from a luminescent plate of 100times100times3mm, and a single-crystalline PV cell of 100times20mm. Characteristics of various prototype modules with different PV cell areas and cell arrangements were also measured. Four kinds of edge reflecting materials with different reflectances by various white coating were applied to Al sashes for module frames, and each sash was fixed on one edge of the luminescent plate. In experiment, 3 other edges were covered with black tapes to reduce each reflectance to 0%. Although PV module output was affected by reflectance of edges, the output was satisfactory at 90% or more in reflectance showing no difference in output. A concentrating efficiency decreased with an increase in luminescent plate (concentrator) area, while it was improved by cell arrangement with short optical pass length, and cell arrangement hardly affected by edge reflection. 4 refs., 7 figs.

  9. Characteristic on photovoltaic/thermal hybrid collector. Evaluation of excergetic theory; Taiyoko netsu hybrid collector no tokusei. Exergy ni yoru hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Iwawaki, H; Morita, Y; Fujisawa, T; Tani, T [Science University of Tokyo, Tokyo (Japan)

    1997-11-25

    Described herein are characteristics of photovoltaic (PV)/thermal hybrid collectors (PV/Ts), in which a PV module is combined with a plate-shape solar heat collector to simultaneously produce electric power and heat. Their efficiency is assessed by exergy. The test results indicate that the PV/T system gives a 1.07 times higher exergy than the PV system, 86.3 versus 80.7kWh. In terms of energy, the optimum values (OVs) are 5, 44 and 37% lower than the measuring values (MVs) for electrical energy, thermal energy and total exergy. In terms of exergy, on the other hand, OV is 5% lower than MV for electrical energy, but 893 times higher for thermal energy and 1.26 times higher for total exergy. As a result, the exergy level is 26% higher than that of a system which generates power as the main product and heat as the auxiliary product. 3 refs., 6 figs., 5 tabs.

  10. Evaluation of flux-trapping and magneto-resistibility of superconductors by ESR spectroscopy; ESR ho ni yoru chodendotai no jisoku hosoku to taijiba tokusei no hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Kusumori, T; Matsuura, K; Muto, H [National Industrial Research Institute of Nagoya, Nagoya (Japan)

    1995-09-28

    The abnormal sisal, which was observed in the ESR measurement of superconductors, was confirmed to be a non-ESR (non resonant) signal, from an ESR experiment applying parallel and vertically polarized microwave fields and from the calculation of the ESR transition probabilities. The field modulation dependence of the spectra revealed that the signal was composed of two components. From the modulation-scheme analysis and a study of type I and II superconductors, two components were assigned to the microwave responses to magnetizations trapped in the crystalline portion and at intergranular Josephson junctions. The former B and the batter J components are observed in the first derivative and absorption a form, respectively, and their polarities differently behave for the field sweep reversal. Based on these results, we have improved an ESR spectrometer, which makes it possible to measure separately two kinds of magnetization and to study the trapping ability and quantum flux. 11 refs., 12 figs., 1 tab.

  11. Improvement of In2O3-based CO sensor by using surface modifiers; Hyomen shushokuzai ni yoru sanka injiumukei soshi no CO kenchi tokusei no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Yamaura, H.; Miura, N.; Amaze, N. [Kyushu University, Fukuoka (Japan); Tamaki, J. [Ritsumeikan University, Kyoto (Japan); Moriya, K. [Osaka Gas Co. Ltd., Tokyo (Japan)

    1998-02-01

    Aiming at developing a semiconductor CO sensor applicable to the safety control of gas appliances, we carried out an extensive material search for promoters to In2O3-based elements. Among the elements added (0.5 wt%) with each of 12 transition metal oxides, the Co3O4-added one was outstanding in sensitivity and selectivity to CO at 200degC. Remarkably the sensing properties of this element could be improved further by the addition of Au (0.04 wt%). The doubly promoted element, Au(0.04 wt%)-Co(0.5 wt%)-In2O3, gave excellent characteristics in sensitivity to CO, selectivity to CO over H2 and other selected gases, and response rates at 250degC. The promoting effects of the additives were shown to originate from the proper enhancement of catalytic activity for CO oxidation. 11 refs., 9 figs.

  12. Improvement of the expression character of sand quality thing for pot SN; Shuka SN yo keisashitsu tsumemono no hatsugen tokusei no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Matsui, R.

    1999-02-01

    It guessed the occurrence mechanism of the hole in, and thing, which a un-barrier hole didn`t happen easily in, was developed the slight structure analysis of sand quality thing, which became a un-barrier hole with an actual opportunity, too. The influence of the metamorphosis of the quartz grows big as a result of the heat dynamics calculation when there are a few R{sub 2}O too much though the amount of liquid phase to form by reducing R{sub 2}O content in thing decreased and it could be estimated that a hole could be prevented. So, the influence of the metamorphosis was added by choosing the place of production of the quartz, and sand quality various things, which could prevent a hole, was developed. (translated by NEDO)

  13. Improvement of magnetic properties of Fe-50mass%Ni in MIM process; MIM process ni okeru Fe-50mass%Ni no jiki tokusei kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Miura, H. [Kumamoto University, Kumamoto (Japan). Faculty of Engineering; Fujita, S. [Kumamoto University, Kumamoto (Japan); Fujita, M.; Ninomiya, R. [Mitsuikinzoku Co. Ltd., Tokyo (Japan)

    2000-12-15

    Metal injection molding (MIM) process is hoped to be one of processing for required to more complicated parts of magnetic components. In this study, the effect of different types of powders (prealloyed and mixed elemental powders) on the magnetic properties of permalloy (Fe-50mass%Ni) through the MIM technique was investigated. Approximately 94% of theoretical density was obtained by using the prealloyed powder, and the retained carbon and oxygen contents were controlled to be low. On the other hand, 96% of theoretical density was obtained by using the mixed elemental powder, but the magnetic properties were inferior to that of prealloyed powder's because of high retained oxygen content. By using the carbonyl Fe powder with high carbon, the retained oxygen and carbon content could be controlled to be low, resulting in the improved magnetic properties. (author)

  14. Emission characteristics of multiple stage diesel combustion. Effect of exhaust gas recirculation; Nidan nensho diesel kikan no haishutsubutsu tokusei. EGR no eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Hashizume, T.; Miyamoto, T.; Akagawa, H.; Tsujimura, K. [New A.C.E. Institute Co. Ltd., Tokyo (Japan)

    1998-05-01

    For an aim to reduce NOx emission from diesel engines, it has become possible to realize it with smoke emission maintained at low levels by taking the following steps: initial combustion is carried out as lean pre-mixed combustion by adopting early fuel injection; the fuel is injected again after completion of this combustion; and EGR is combined with two-stage combustion which performs diffusion combustion under high temperature atmosphere. When a large quantity of EGR is used, cylinder temperature drops to have ignition timing delayed in the first stage, serving for improving fuel consumption. The problem of increase in smoke generation is solved by optimizing the injection timing at the second stage to suppress smoke generation increase, resulting in realization of lower NOx emission. By completing the second-stage fuel injection before ignition of the first-stage injection, it was possible to realize further lower NOx emission. Smoke increase due to higher EGR ratio was suppressed by pre-mixing both fuels injected in the first and second stages, although this is a high load operation. In addition, oxygen concentration and cylinder temperature were reduced, the gas pre-mixture was homogenized, and combustion velocity was suppressed by delaying the angle of ignition timing. This made low smoke combustion at {lambda} = 1 possible even in compressed ignition combustion. 8 refs., 12 figs., 1 tab.

  15. Characteristics of radiation temperature and radiosity coefficient by means of infrared radiometer. Sekigai hoshakei ni yoru zairyo hyomen no hosha tokusei ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Okamoto, Y; Kaminaga, F [Ibaraki University, Ibaraki (Japan). Faculty of Engineering; Ishii, T; Sato, K [Ibaraki University, Ibaraki (Japan); Kurokawa, T [NEC San-ei Instrumentsu Ltd., Tokyo (Japan)

    1991-12-25

    A radiation thermometer was applied to the measurement and analysis of radiation temperature of the material surface. In this paper, the characteristics of the radiation temperature and the radiosity coefficient of gray body materials are investigatied. An infrared radiometer was used, which detects radiation energy in the region between 8 and 13{mu}m of wavelength. This infared radiometer has a Hg-Cd-Te photon radiation sensor. The variation of emissivity was measured for the four kinds of non-metalic materials, i.e., graphite, carbon fiber composite, Si-SiC ceramic, and black paint spread on an aluminum plate. As a result, the relationship between material temperature and radiation energy was made clear. Furthermore, the space-dependent variation of the radiation temperature and the radiosity coefficient was derived from the two-dimensional CRT image of the infrared radiometer. Consequently, the emmisivity variation gave a maximum for the carbon fiber composite surface rich in irregularity, and decreased in the order of graphite, Si-SiC, and black paint. 7 refs., 15 figs.

  16. Study of human interface for narrow road drive assist system considered characteristic of driver; Driver no tokusei wo koryoshita kyoro soko shien system no human interface no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Ikeda, A [Subaru Research Center Co., Tokyo (Japan); Amada, N; Kawashima, H [Keio University, Tokyo (Japan)

    1997-10-01

    The measurement of driver`s watching point, driving time on narrow road and the evaluation of stress etc. were conducted in order to construct the narrow road drive assist system using the stereo image recognition system. Consequently, the driver`s thinking process, stress factor and the indispensable information for this system were clarified. 4 refs., 8 figs., 3 tabs.

  17. Influence of strain hardening and thickness changes occurring in press forming process; Seikeiji no kako koka/itaatsu henka no buzai akkai tokusei ni oyobosu eikyo bunseki

    Energy Technology Data Exchange (ETDEWEB)

    Ueno, M; Hirota, K [Mazda Motor Corp., Hiroshima (Japan); Nakazawa, Y [Sumitomo Metal Industries Ltd., Osaka (Japan)

    1997-10-01

    Most components of the body structure are produced by press forming. This process make a uniform metal sheet into a component that have various material characteristics and thickness. This paper describes the estimation method of material characteristics and thickness changes based on the measured Vickers hardness, and the influence of these changes on the crush performance by using FE analysis. 4 refs., 12 figs., 2 tabs.

  18. Output characteristics of floating type wave power generator system using a ball screw; Fuyugata nejishiki haryoku hatsuden sochi no shutsuryoku tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Abe, T; Omata, K [Meiji University, Tokyo (Japan)

    1996-10-27

    A floating type wave power generator system using a ball screw is proposed. Output characteristics are simulated on the supposition of its employment aboard a navigational aid buoy. The relative linear movement produced by waves between the main body and float is transmitted via a load column to a ball nut and is converted into a rotary movement of a threaded shaft engaging the ball nut. Attached to the bottom end of the threaded shaft is a one-way clutch which connects to the generator axle when the relative velocity between the float and main body is positive. The simulation was conducted for a wave activated power generation buoy, 2.6m in outer diameter, 4.5m in length, and 6000kg in total mass. The buoy generated a mechanical output of 340kW when exposed to a sinusoidal wave 2.5 seconds in period and 40cm in wave height. A tank test was performed using a reduced scale model consisting of a ball screw, bicycle dynamo, and float, with the main body being 318mm in diameter and 833mm in length, when an average output of 4.51W was obtained at 60% efficiency. The results of the experiment agreed in some degree with the results of calculation, verifying the righteousness of the theoretical formula. 3 refs., 7 figs., 4 tabs.

  19. Characteristics on the heat storage and recovery by the underground spiral heat exchange pipe; Chichu maisetsu spiral kan ni yoru chikunetsu shunetsu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Imai, I [Kure National College of Technology, Hiroshima (Japan); Taga, M [Kinki University, Osaka (Japan)

    1996-10-27

    The consistency between the experimental value of a soil temperature and the calculation value of a soil temperature given by a non-steady heat conduction equation was confirmed. The experimental value is obtained by laying a spiral heat exchange pipe in the heat-insulated soil box and circulating hot water forcibly in the pipe. The temperature conductivity in soil significantly influences the heat transfer in soil. The storage performance is improved when the temperature conductivity increases because of the contained moisture. As the difference between the initial soil temperature and circulating water temperature becomes greater, the heat storage and recovery values increase. A thermal core heat transfer is done in the spiral pipe. Therefore, the diameter of the pipe little influences the heat storage performance, and the pitch influences largely. About 50 hours after heat is stored, the storage performance is almost the same as for a straight pipe that uses the spiral diameter as a pipe diameter. To obtain the same heat storage value, the spiral pipe is made of fewer materials than the straight pipe and low in price. The spiral pipe is more advantageous than the straight pipe in the necessary motive power and supply heat of a pump. 1 ref., 11 figs., 1 tab.

  20. Burning rate characteristics of energetic CMDB propellants. Part 2. Effect of HMX addition; Ko enerugi CMDB suishin yaku no nensho sokudo tokusei ( II ) - HMX tenka no koka -

    Energy Technology Data Exchange (ETDEWEB)

    Aoki, I. [Nissan Motor Co. Ltd. (Japan)

    1997-08-01

    Burning rate and specific impulse of a solid propellant are extremely important parameters in a design of a solid rocket motor. In this study, the relations between the burning rate and the amount of energy contained in HMX-CMDB propellants wherein the amount of energy is varied by adding HMX (High Melting Point Explosive). The following results are obtained. The final flame temperature is getting higher when the amount of energy is increased by adding HMX into a double-base propellant. The higher the final flame temperature is, the lower the burning rate is. Dark zone temperature, as a physical property, is lowered when the containing amount of energy is increased by adding HMX into the double-base propellant. This is because that, when weight fraction of HMX is increased, reaction heat at burning surface decreases, and the reaction in fizz zone is getting slower. The higher the dark zone temperature is, the higher the burning rate is. 20 refs., 11 figs., 1 tab.

  1. Cavitation characteristics of multihole diesel-fuel nozzles in high-speed oil flows. Diesel kikan yo nenryo tako nozzle no abura cavitation tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Yokota, M. (Shimonoseki Univ. of Fisheris, Yamaguchi (Japan)); Ito, Y. (Hachinohe Inst. of Tech., Aomori (Japan)); Aoki, H. (Xexel-Gleason U.S.A. Inc., New York (U.S.A))

    1991-07-25

    Recently, since higher velocity and higher pressure are required for diesel injection systems, cavitation behaviors in high velocity oil flows are strongly interested in such as 100 to 500 m/s for oil flow velocity and less than the cavitation factor {sigma} of 0.01. In this paper, oil cavitation characteristics at the injection part of multihole nozzles, especially on the flow characteristics, were studied systematically using fuel injection multihole nozzles for an actual use. As a result, it was clarified that subcavitation area (sub C), transition area, and supercavitation area (SC) could be existing in C{sub d}-{sigma} relation, which was similar to that specified cavitation conditions could be exisiting in the actual working area of multihole nozzles. And it was also clarified that flow coefficient C{sub d} relied on Reynolds number R{sub e} in the transition of {sigma}{ge}{sigma}{sub cr} and in {sub C} area, and mainly relied on {sigma} in SC area of {sigma}<{sigma}{sub cr}. Moreover, it was also confirmed that such tendency was similar to the one of the two-dimensional contraction of an area. 22 refs., 10 figs., 1 tab.

  2. Effect of Water Environment on Subcritical Crack Growth of Machinable Ceramics; Kaisakusei seramikkusu no kiretsu shinten tokusei ni oyobosu mizu kankyo no eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Ikeda, K.; Kaizu, K.; Inotani, T. [Miyazaki Univ., Miyazaki (Japan); Yoshikawa, A.; Adachi, K.; Igaki, H. [Osaka Sangyo Univ., Osaka (Japan)

    1997-06-15

    The fatigue behavior of ceramics has been discussed on the basis of the relation between stress intensity facter (KI) and crack velocity (V). In this paper, the effect of environment on the relation between KI and V was studied on machinable ceramics (mica glass ceramics) and two kinds of glass ceramics with different grain sizes. The double torsion (DT) technique was used for the determination of the KI-V characteristics under different environments of air and ion-exchanged water. The characteristics of acoustic emission (AE) during stress corrosion cracking of mica glass ceramics was also examined. In water environment, the region II in the KI-V curve, in which crack velocity varies slowly with KI, disappeared. From this experimental fact, it was considered that at high KI, the crack velocity is encouraged by diffusion of the corrosive species to the crack and thus depended on the amount of water. SEM farc tography revealed that mica single crystals in the material caused crack arrest and deflection to occur. It is also found that AE event rate is quantitatively related to the crack velocity. AE measurement can be used in studying the crack propagation behavior of mica glass ceramics. 11 refs., 12 figs., 3 tabs.

  3. Study on property-gradient polymer electrolyte for rechargeable lithium batteries; Lithium niji denchi no tame no keisha tokusei kobunshi denkaishitsu no sosei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Kokumi, Z; Kanemura, S; Inaba, M; Takehara, Z; Yao, K; Uchimoto, Y [Kyoto University, Kyoto (Japan)

    1997-02-01

    This paper describes the fundamental experiments for creating property-gradient polymer electrolyte for rechargeable lithium batteries. The rechargeable lithium battery is composed of an anodic composite agent section with high ion conductivity, a separator equivalent section with high mechanical strength (high bridging degree), and a section surpressing the precipitation of metal lithium by contacting with it. The continuous property-gradient polymer electrolyte was tried to be synthesized by means of the plasma polymerization method. As a result, plasma polymerization electrolyte with high ion conductivity could be prepared from the liquid phase by using a monomer with low vapor pressure. Porous material simulating the anodic composite agent was impregnated by the monomer, which was plasma-polymerized. As a result, it was found that the bridging degree decreased from the surface towards the inside of the plasma-polymerized porous material. In addition, polymer was prepared using fluorine-base monomer. Thus, LiF thin film could be prepared through the reaction between the polymer and metal lithium. 3 figs.

  4. Studies on the friction and wear properties of synchronizer rings and gear cones; Shinkuro kiko ni okeru masatsu mamo tokusei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Hayashi, K; Kunoki, T [COSMO Research Institute, Tokyo (Japan)

    1997-10-01

    The influence of materials of synchronizer rings, automotive gear oils and sulfur-phosphorus EP additives on the friction and wear properties of synchromesh system was studied by using a synchromesh friction tester. As a result, the durability was decreased by using the synchronizer ring made of copper alloys. The initial friction performance estimated by using the synchronizer ring made of resin have influence on EP additives, in particular some kinds of phosphorus type additives. 3 refs., 12 figs.

  5. Effect of ATF on frictional property of wet-type clutch; Shisshiki crutch (hasshin clutch) no masatsu tokusei ni oyobosu ATF no eikyosei

    Energy Technology Data Exchange (ETDEWEB)

    Yoshida, J; Nagashima, T; Yamane, T; Kawauchi, s; Hirao, Y [Honda R and D Co. Ltd., Tokyo (Japan)

    1997-10-01

    As a starting device for continuously variable transmission, wet-type multiple disc clutch installed to the driven side (Starting clutch system) is suitable system. Starting clutch system is feared to occur the judder phenomenon, because it is used at low slipping velocity like a lock up clutch. In this report, we studied to prevent the judder phenomenon about the effect of automatic transmission fluid on frictional property of the wet-type clutch. 6 refs., 7 figs., 2 tabs.

  6. Explosion properties of aluminum/oxidizer mixtures in a closed vessel; Aluminium/sankazai kongobutsu no mippei yokinai deno bakuhatsu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Miyake, A.; Aochi, T.; Shiraki, K.; Ogawa, T. [Yokohama National University, Yokohama (Japan). Faculty of Engineering

    1995-10-31

    In order to understand explosion properties of aluminum/oxidized mixtures for firework a closed vessel test was carried out, and pressure profile and ignition delay time were measured. It was found that flake aluminum (Al(f))/oxidized mixtures were more reactive and showed higher pressure values than those of atomized aluminum (Al(a))/oxidized mixtures. At a positive oxygen balance region Al(f)/oxidized mixtures showed a good agreement with the theoretically predicted values of combustion pressure at a constant volume. The combustion parameters with equilibrium calculation of aluminum/potassium chlorate showed almost the same ones of aluminum/potassium perchlorate. Furthermore, to investigate the influence of particle diameter of potassium chlorate on the explosion properties of Al(f)/potassium chlorate mixtures, the same kind of closed vessel test was performed and it was found that the mixtures became less sensitive and reactive with the increase of particle diameter. 17 refs., 7 figs., 2 tabs.

  7. Heat recovery properties from fuel cell system for telecommunications use; Tsushin`yo nenryo denchi system ni okeru hainetsu kaishu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Ishizawa, M.; Iida, S.; Abe, I.; Yamamoto, M. [NTT Integrated Information and Energy Systems Laboratories, Tokyo (Japan)

    1997-08-20

    NTT is developing a phosphoric-acid fuel-cell energy system for telecommunication co-generation systems to reduce energy costs and help preserve the environment. Fuel cells are used to provide electrical power to telecommunication equipment and the heat energy that is generated is used by the absorption refrigerators to cool the telecommunication rooms throughout the year. We field-tested this fuel-cell energy system in a telephone office. Two heat recovery methods were applied in the test: one uses direct steam heat recovery from fuel-cell stack coolant to keep the heat recovery temperature high and to avoid requiring a heat exchanger for the recovery; the other uses heat recovery from the reformer exhaust gas that is directly in contact with the heat recovery water to recover heat more economically. Our field tests confirmed that the average efficiency of heat recovery from fuel-cell stack coolant is 16%, and from the reformer exhaust gas is 9% under 80-kW continuous operation. Maximum total efficiency including electrical power efficiency was confirmed to be about 73% under the condition of 100-kW and an S/C ratio of 2.5 in the winter period: heat recovery from the fuel-cell stack coolant was 23%, from the reformer exhaust gas was 10%, and from electrical conversion was about 40%. 9 refs., 12 figs., 1 tab.

  8. Hear recovery properties from fuel cell system for telecommunications use; Tsushin`yo nenryo denchi system no fuirudotesuto ni okeru hainetsu kaishu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Ishizawa, M.; Iida, S.; Abe, I.; Amanuma, H. [NTT Integrated Information and Energy Systems Laboratories Tokyo (Japan); Uekusa, T.; Waragai, S. [NTT Power and Building Eacilities Inc., Tokyo (Japan)

    1997-12-20

    NTT is developing a phosphoric acid fuel cell energy system for telecommunication co-generation systems to reduce energy costs and help preserve the environment. Fuel cells are used to provide electrical power to telecommunication equipment and the heat energy that is generated is used by the absorption refrigerator to cool the telecommunication rooms throughout the year. We fieldtested this fuel cell energy system in a telephone office for three years. Heat recovered water from fuel cell stack coolant was supplied to the absorption refrigerator and further extra-heat was recovered by a heat exchanger. The toral heat recovery amount was about 86000 kca/h (the heat recovery efficiency was 20%) under 200kW operation. The absorption refrigerator was supplied about 49000kcal/h of heat and operated with 0.7 of coefficient of performance throughtout the year. The electrical efficiency was maintained more than 38% after 13000h operation. 12 refs., 10 figs., 3 tabs.

  9. Breakdown characteristics of electro-negative gases under needle-plane gap. Hari-hiraita gap ni okeru denkiteki fusei gas no zetsuen hakai tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Nakayama, H.; Onoda, M.; Amakawa, K. (Himeji Institute of Technology, Hyogo (Japan)); Kuroda, S. (Nitto Denko Corp., Tokyo (Japan))

    1990-07-20

    The voltage-time (V-t) characteristics of corona onset and breakdown were examined in electro-negative gases as SF {sub 6} and CCl {sub 2} F {sub 2}, using a needle-plane electrode with small gap and {mu} s square pulse voltage with various wave fronts. The V-t characteristics in electro-neutral gas as N {sub 2} ordinarily descended rightwards, but those in SF {sub 6} descended rightwards only in smaller gaps and lower gas pressures. In the pulse voltage with shorter wave fronts, those in SF {sub 6} also offered a particular shape descending leftwards. The particular shape was dependent on the steepness of the pulse wave front, being strongly affected by shorter wave fronts, and also strongly related to the onset and development length of corona. The particular phenomenon of V-t characteristics was observed more obviously at a positive needle than negative one without any extremely long corona lengths at negative one, indicating a polarity effect. The phenomenon was also observed in CCl {sub 2} F {sub 2} as particular one in electro-negative gases. 21 refs., 12 figs.

  10. Development of metal complexes which has a novel type of dhotocatalysis activity; Shinki hikari shokubai tokusei wo yusuru kinzoku sakutai no sousei

    Energy Technology Data Exchange (ETDEWEB)

    Ishitani, Osamu [Saitama University, Saitama (Japan). Graduate School of Sceince and Engineering

    1999-12-16

    Purpose of this research are (1) development of photocatalysts which selectively drive hydride transfer and (2) their application to the enantioselective reduction of an unsaturated substrate. photocatalysis of [Ru(bpy){sub 2}(py){sub 2}]{sup 2+} (1) and [Ru(tpy)(bpy)(py)]{sup 2+} (2) (bpy=2,2'-bipyridine, tpy=2,2' : 6',2' '-terpyridine, py=pyridine) for reduction of unsaturated compounds was investigated using triethylamine as a reductant. Formation of the hydrogenated compounds was observed but the corresponding one electron reduced compounds were not detected at all. The complex 1 photocatalysed the reduction of trifluoroacetophenone (5) and gave the alcohol in a 67% yield but 2 gave only a 27% yield. The reaction proceeds via the photosubstitution of a py ligand of the ruthenium complex, followed by photochemical formation of the hydride complex. The ruthenium hydride complex reacts with 5 to give [Ru(tpy)(bpy)(OCHPhCF{sub 3})]{sup +} (4). Dissociation of 4 to the alcohol was not efficient and the yield was 10%. (author)

  11. Evaluation of damping property of long-span prestressed concrete cable-stayed bridges; Chodai PC shachokyo no gensui tokusei ni kansuru kosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Yamanobe, S.; Niihara, Y.; Minami, H.; Kono, T. [Kajima Corp., Tokyo (Japan)

    1999-09-30

    As to the dynamic design in the antiseismic design of PC cable-stayed bridges, evaluation of damping is important. Since it is difficult to evaluate damping property theoretically and analytically, a lot of studies have not been made about how to set up damping coefficients. In this study, using analytical models of existing long-span PC cable-stayed bridges, to clarify causes of damping of long-span PC cable-stayed bridge, the rate of strain energy in each member was examined. Equivalent damping coefficients of each member, effects of friction in movable bearing, and effects of basically radiational damping were studied. The correspondence with the results of the vibration experiments conventionally made were studied. (translated by NEDO)

  12. Aerodynamics of the cable of cable-stayed bridges; Shachokyo cable no kuriki shindo tokusei no rikai to soreni motozuku kuriki seishinho no teian

    Energy Technology Data Exchange (ETDEWEB)

    Matsumoto, M. [Kyoto University, Kyoto (Japan). Faculty of Engineering; Aoki, J.; Fuji, D. [West Japan Railway Company, Osaka (Japan); Kitayama, N. [Ishikawajima-Harima Heavy Industries Co. Ltd., Tokyo (Japan); Daito, Y. [Kyoto University, Kyoto (Japan)

    1996-07-21

    Wind tunnel tests were conducted assuming the aerodynamics of the cable of cable-stayed bridges especially in the case of strong wind with rain. Based on the results, an aerodynamic damping method was proposed. Factors of the rain vibration generation include the three-dimensional axial flow behind the cable, which is formed by the wind direction deviation angle, the upper side water flow on the cable surface formed by the rain, and the Karman vortex shedding, which are not uniform in the span direction. Newly proposed cable with elliptical plates showed an effective dumping performance. It restrains the formation of water flow due to its profile, and is effective for unstableness due to water flow formation. Distribution of the axial flow in the cable span direction was made clear. Three-dimensionality of the vortex shedding was greatly affected by this axial flow. Frequency of the Karman vortex shedding changed in the wide band by the axial flow. It was suggested that three-dimensionality of the flow field is enhanced by the rolling vibration, resulting in the unstableness of heaving vibration. 5 refs., 15 figs.

  13. Analysis of vibration characteristics of a prestressed concrete cable-stayed bridge using strong motion observation data. Jishin kansoku ni motozuku PC shachokyo no shindo tokusei no kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Inatomi, T. (Port and Harbour Research Institute, Kanagawa (Japan)); Takeda, T.; Obi, N.; Yamanobe, S. (Kajima Corp., Tokyo (Japan))

    1994-05-31

    Records of seismic observation were analyzed for the purpose of proving the validity of antiseismic design for a prestressed concrete (PC) cable-stayed bridge. This bridge is a three span continuous PC cable-stayed bridge of 498 m in bridge length, and is constructed on alluvial soft ground. The seismometer used is a servo type accelerometer. The observed frequency and mode of seismic vibration are in good agreement with those in the analysis and hence the validity of modelling of the structure in designing was confirmed. It was also confirmed that the bending vibration and torsional vibration of the main girder are separated as designed. However, some points such as a large difference in the observed vibration and analysed vibration in the mode accompanying rotation of the base are listed as problems to be solved in antiseismic design. In order to investigate the attenuation constant of the upper structure, a seismic wave response analysis was performed and its results were compared with observed ones. When the attenuation constant is assumed to be 2%, agreement of data between analysis and observation is good, and it is considered that the attenuation constant of the upper structure only without the effects of attenuation of energy escape from the base and crack generation in concrete was about 2% in the observed earthquake (maximum acceleration on the ground: 51 Gal). 8 refs., 9 figs., 2 tabs.

  14. Experimental study on buckling and ultimate strength of thin-walled box stub columns; Usuniku hakogata danmen buzai no zakutsu / shukyoku kyodo tokusei ni kansuru jikkenteki kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Nakai, H.; Kitada, T. [Osaka City Univ. (Japan); Oryu, T. [Kawasaki Heavy Industries Ltd., Kobe (Japan)

    1998-10-21

    Thin-walled box stub columns such as beams of cable-stayed bridge, suspension bridge tower, arch rib of arch bridge and steel piers and so forth can also bear torsion at the same time besides compression and bending. These thin-walled box stub columns may achieve ultimate condition before reaching to plastic condition due to the effect of local buckling and so forth. Accordingly, it is the important topic to study the properties regarding ultimate strength of thin-walled box members in order to evaluate correctly the effect on load bearing resistance of local buckling. In this report, validity of load bearing resistance curve and ultimate strength interaction curve proposed by authors was studied using load bearing capacity experiment results. As a result, all ultimate strengths obtained by the experiment were higher than the ultimate strengths estimated by load bearing capacity curve and ultimate strength interaction curve. Further, it was revealed that the specimens subjected to torsion or subjected to bending and torsion and so forth exceeded the plastic strength due to the effect of strain hardening. 12 refs., 14 figs., 4 tabs.

  15. Identification of dynamic characteristics by field vibration test in Tsurumi Tsubasa bridge; Tsurumi Tsubasakyo no shindo jikken ni yoru doteki tokusei no dotei

    Energy Technology Data Exchange (ETDEWEB)

    Yamaguchi, H. [Saitama University, Saitama (Japan). Faculty of Engineering; Takano, H.; Ogasawara, M.; Shimosato, T. [Metropolitan Expressway Public Corp., Tokyo (Japan); Kato, M.; Okada, J. [NKK Corp., Tokyo (Japan)

    1996-07-21

    Field vibration test of the Tsurumi Tsubasa Bridge, a long span cable stayed bridge, has been conducted. Focusing on its dynamic characteristics, an identification method from test results and its validity were investigated. The natural frequency identified using mode circle and resonance curve from steady vibration test agreed with that identified by the peak method from free damping test. Accordingly, there was no difference due to identification methods, and both methods provided appropriate accuracy. The natural vibration mode obtained from the steady vibration test agreed with that obtained by the eigenvalue analysis. The dispersion of experimental values, which indicates the adaptation to mode circle method, became a scale indicating reliability of identified values. When the damping obtained by the half power method for the microtremors test is compared with that identified from the steady vibration test and free damping test, it is required to compare them at lower amplitude level region, considering that the amplitude level of microtremors test is very low. For the dynamic characteristics of the Tsurumi Tsubasa Bridge, it was found that it has lower natural frequency and higher modal damping compared with other cable stayed bridges with similar scale of span. 18 refs., 13 figs., 4 tabs.

  16. Characteristics and utilization of non-wood pulp and paper; Himokuzai pulp / kami no tokucho to sono riyo

    Energy Technology Data Exchange (ETDEWEB)

    Hara, H. [Mishima Paper Co. Ltd., Shizuoka (Japan)

    1998-09-01

    The reasons, difficulty in the usage, and the methods of use of non-wood papers are discussed. Non-wood papers sold in Japan are arranged basing on published data. The type of non-wood paper classified as special printing paper makes up the majority, and there are a variety of other products such as printing board, coated paper, thin paper, wrapping paper, functional paper, and watercolor paper. Kenaf and cotton are used in large quantities as non-wood plants for paper production, and use of bagasse and bamboo is increasing. Non-wood paper are used in consideration of environmental and resources problems and for utilizing the special features of non-wood fiber, and the characteristics of non-wood pulp and the effect of non-wood paper are discussed in this report. It is expected that papers utilizing the characteristics of non-wood paper will be developed. Non-wood papers are substitutions for various papers produced from wood pulp, and the fundamental point is the method of improving the original quality and paper quality by combining with non-wood pulp. 11 refs., 4 figs., 3 tabs.

  17. “Per fortuna ci sono le mucche.” Brevi considerazioni sul valore del pañcgavya.

    Directory of Open Access Journals (Sweden)

    Deborah Nadal

    2014-12-01

    Full Text Available This article analyses the value of pañcgavya and its role in Hindu culture and religion. “Pañcgavya” is a Sanskrit word which means “the five of the cow”, i.e. milk, curd, clarified butter, dung and urine. These five products can be used one by one or combined together in proper ratio. For centuries they have been used in traditional Hindu rituals as prasad (religious offering consumed by the worshippers, as medicaments in Ayurvedic medicine and as fertilizers and pesticides. Nowadays these cow products are utilized for personal hygiene and for household cleanliness as well. The medicinal usage of pañcgavya, particularly cow urine, is commonly known as “cowpathy” and is very appreciated by Indian, especially Hindu, consumers. The reasons of this success are the eco-friendliness of these natural products and, above all, the fact that they come from the body of the most esteemed animal of India. In Hindu culture the cow is considered to be the highest example of purity and perfection and the best emblem of generosity and plenty. The “five of the cow” are the most important products of this magnanimity.

  18. Research of fragranced air, environmental aroma, to human and its application. Kankyo hoko no koka to sono oyo

    Energy Technology Data Exchange (ETDEWEB)

    Hashimoto, S. (Shimizu Construction Co. Ltd., Tokyo (Japan))

    1991-06-01

    The effect of lemon, jasmine and lavender aroma on people was studied through environmental aroma experiments by 270 subjects in a meeting room for two months. As a result, the high percentage of positive responses was obtained on the sense of air cleanliness and efficiency of meetings, and a statistical significance was, in particular, obtained in the case of lemon as smoking was permitted. It was suggested that aroma had physiological and phychological effect even under conditions where the subjects were not necessarily aware of aroma. The effect of the same three aromas was also studied through experiments by 13 subjects in a VDT room for one month. As a result, the number of keypunch errors decreased in every aroma although punching speeds decreased slightly, and lemon showed a significant difference among three aromas. Based on these experimental results, the aroma generator was developed, and more than 30 environmental aroma systems combined with air conditioning ducts have been installed in Japan. 20 refs., 5 figs., 6 tabs.

  19. Sea bottom gravity survey of Osaka bay and its study; Osakawan kaitei juryoku chosa to sono kosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Komazawa, M [Geological Survey of Japan, Tsukuba (Japan); Ota, Y; Shibuya, S; Kumai, M; Murakami, M [Japex Geoscience Institute, Inc., Tokyo (Japan)

    1996-05-01

    This paper reports a sea bottom gravity survey conducted with an objective to identify deep underground structure in the vicinity of the epicenter of the Hyogoken-Nanbu Earthquake. The surveyed areas are the whole Osaka Bay area north of the north latitude of 34 degrees and 20 minutes, and the eastern part of the Sea of Harima east of the east longitude of 134 degrees and 40 minutes, excluding the areas difficult of performing measurements. A square lattice with sides each about 2 km was arranged with 408 measurement points. The measurement was carried out by using an observation vessel mounted with a sea bottom gravimeter made by LaCoste and Romberg Corporation, which was lowered down to the sea bottom at the measurement points. Errors in positions and water depths at the gravity measuring points were suppressed to less than 0.002 minutes and 0.1 m, respectively. The measurement data were given necessary corrections by using a unified method applicable also to land areas, and a Bouguer anomaly chart was prepared. Based on the chart, this paper summarizes features in the Bouguer anomaly in the surveyed areas (such as the low-gravity anomaly band extending the central part of the Osaka bay from north-east to south-west, and the gradient structure existing on the Awaji island side). 6 refs., 1 fig.

  20. Erection of the stiffening girder of the Akashi Kaikyo bridge; Akashi Kaikyo Ohashi hokoketa (sono 2) koji no genchi seko

    Energy Technology Data Exchange (ETDEWEB)

    Otsuki, M.; Inoue, M.; Ueno, Y.; Matsumura, T.; Oe, S. [Kawasaki Heavy Industries, Ltd., Kobe (Japan)

    1998-12-20

    The Akashi Kaikyo Bridge is 3,911m long with a center span of 1,991m, making it the longest suspension bridge in the world. Much careful attention has been given to the erection planning details in order to construct the bridge to withstand the harsh environmental conditions of that area. This report details the characteristics of the bridge stiffening girder and erection procedure, and the effects of the Hyogoken-Nanbu Earthquake. (author)

  1. Studies of structure change of iron sulfates and its catalysis; Ryusantetsukei shokubai no kozo henka to sono shokubai sayo

    Energy Technology Data Exchange (ETDEWEB)

    Ogata, E.; Horie, K. [The University of Tokyo, Tokyo (Japan). Faculty of Engineering; Nishijima, A. [National Institute of Materials and Chemical Research, Tsukuba (Japan)

    1996-10-28

    Since a huge amount of coal containing inorganic ash is treated for the commercial hydroliquefaction process, cheap catalysts widely distributing on the earth with large reserves are desired rather than expensive catalysts. This paper describes the effects of addition of sulfur on the catalysis of iron sulfates during the hydroconversion of 1-methylnaphthalene (1-MN). Reactions of 1-MN were conducted at the same charging amount of iron in the reaction system. Sulfur was directly added in the reaction system using ferrous sulfate (FeSO4) as precursor. Consequently, it was found that FeSO4 provides lower but similar catalytic activity to the synthetic pyrite catalyst prepared through the complex processes with the precise control. Thus, it was revealed that high performance pyrrhotite (Fe(1-x)S) catalyst can be prepared for the hydrogenation of aromatic-rings by adding solid sulfur into the reaction system using commercial reagent, FeSO4 as a precursor of the catalyst. 9 figs.

  2. Charcterized surpervisory control system for elevators and its support equipment. Elevator koseika gun kanri system to sono shien sochi

    Energy Technology Data Exchange (ETDEWEB)

    Tobita, T.; Fujino, A.; Yoneda, K.; Ueshima, T. (Hitachi Ltd., Tokyo (Japan))

    1991-12-20

    Objective of elevators plural control system for performing the operation control of multiple elevators is to improve the service to users. The service improvement toward a conventional plural control system is mainly to reduce waiting time on the riding floor from the calling button being pushed till elevator reaching the riding floor. Subsidiary to it, merely energy-saving is carried out. In the present study, a characterized supervisory control system was developed to make plural supervisory control receiving the requests from users to reduce not only the usual waiting time but also riding time and congestion inside. In order to meet the requests of users, a characterized support equipment was produced dialogically by combining fuzzy ratiocination, production system as well as simulation. The effects thereof were confirmed. 12 refs., ll figs., 2 tabs.

  3. " LE ANIME SONO SANGUE " (REF. I 22, 5 = 340 USENER) UNA TESTIMONIANZA 'IPPOLITEA' SULLA PSICOLOGIA DI EPICURO *

    OpenAIRE

    Scalas , Giulia

    2015-01-01

    International audience; In this paper I aim at analysing one passage of the Refutatio omnium haeresium (I 22, 5 = 340 Usener) to understand whether it is consistent with the Epicurean doctrine of soul. First, I provide an account of the historical context of the Refutatio. Secondly, I provide a comparison between the content of the passage and the Epicurean psychology. As a result, the theory according to which " souls are blood " , which occurs in the passage, appears to be inconsistent with...

  4. Novel methodology for the production of carbon nanotubes and their application; Atarashii kabon nanochubu no seizo to sono oyo

    Energy Technology Data Exchange (ETDEWEB)

    Kyotani, T; Tomita, A [Tohoku Univ., Sendai (Japan)

    1996-11-01

    Carbon nanotubes (CNTs) are highly evaluated together with fullerene for their potential use as novel materials. Currently, CNTs can be synthesized by arc discharge with carbon electrodes or by thermal decomposition of hydrocarbons in gas phase. However, neither of these processes afford selectively CNTs homogenous in diameter and length. The authors found out that homogeneously sized CNTs are available by using, as templates for depositing carbon, linear micro-pores in oxide film formed by anodic oxidation of aluminum. The diameter, length and density of micro-pores can be easily controlled by changing conditions for electrolysis. Carbon is deposited onto the inner wall of the pore by thermal decomposition of propylene at 800 centigrade in a quartz reaction tube. Thereafter, oxide film is removed by dissolution. CNTs thus obtained are open in both ends and easy for insertion of heterogeneous materials such as metals into pore space. A platinum/CNT one-dimension complex was prepared by inserting platinum. Since complexes such as this may have novel properties that bulk materials would not show, they are expected to be used as novel semiconductors or catalysts. 7 refs., 4 figs.

  5. Development of a Sono-Assembled, Bifunctional Soy Peptide Nanoparticle for Cellular Delivery of Hydrophobic Active Cargoes

    DEFF Research Database (Denmark)

    Zhang, Yuanhong; Zhao, Mouming; Ning, Zhengxiang

    2018-01-01

    -assembled SPN in spherical appearance and core-shell structure maintained by noncovalent interactions was successfully fabricated, exhibiting small particle size (103.95 nm) in a homogeneous distribution state (PDI = 0.18). Curcumin as a model cargo was efficiently encapsulated into SPN upon sonication, showing...... high water dispersity (129.6 mg/L, 104 higher than its water solubility) and storage stability. Additionally, the pepsin-resistant SPN contributed to the controlled release of curcumin at the intestinal phase and thus significantly improved the bioaccessibility. Encapsulated curcumin was effective...

  6. High stable suspension of magnetite nanoparticles in ethanol by using sono-synthesized nanomagnetite in polyol medium

    International Nuclear Information System (INIS)

    Bastami, Tahereh Rohani; Entezari, Mohammad H.

    2013-01-01

    Graphical abstract: - Highlights: • The sonochemical synthesis of magnetite nanoparticles was carried out in EG without any surfactant. • The nanoparticles with sizes ∼24 nm were composed of small building blocks with sizes ∼2 nm. • The hydrophilic magnetite nanoparticles were stable in ethanol even after 8 months. • Ultrasonic intensity showed a crucial role on the obtained high stable magnetite nanoparticles in ethanol. - Abstract: The sonochemical synthesis of magnetite nanoparticles was carried out at relatively low temperature (80 °C) in ethylene glycol (EG) as a polyol solvent. The particle size was determined by transmission electron microscopy (TEM). The magnetite nanoparticles with an average size of 24 nm were composed of small building blocks with an average size of 2–3 nm and the particles exhibited nearly spherical shape. The surface characterization was investigated by using Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The stability of magnetite nanoparticles was studied in ethanol as a polar solvent. The nanoparticles showed an enhanced stability in ethanol which is due to the hydrophilic surface of the particles. The colloidal stability of magnetite nanoparticles in ethanol was monitored by UV–visible spectrophotometer. According to the results, the nanoparticles synthesized in 30 min of sonication with intensity of 35 W/cm 2 (50%) led to a maximum stability in ethanol as a polar solvent with respect to the other applied intensities. The obtained magnetite nanoparticles were stable for more than12 months

  7. Le serie tv sono la nuova soap opera? Luci e ombre della Grande Serialità televisiva

    Directory of Open Access Journals (Sweden)

    Daniela Cardini

    2016-06-01

    Full Text Available Until a few years ago, television seriality was a secondary topic in the academic research, above all in Italy, whereas today, tv series have turned into the main interest of a lively scholarship, mostly belonging to disciplines traditionally not interested in the study of serial forms. Mutatis mutandis, today the central role of tv series is similar to the relevance of the soap opera in the critical debate in the Eighties and Nineties. From being neglected as an irrelevant part of television schedules, in a few years the soap opera turned into the symbol of a rich and polysemic textuality which quickly became the central topic of the newly-born fields of television studies and women studies. Obviously, the parallel between the soap opera and the new tv series cannot be drawn upon narrative or aesthetic dimensions, but (in the maybe provocative perspective proposed by this paper both formulas demonstrate a basic assumption of seriality: serial forms are  shaped by the mediascape they stem from. Therefore, as it happened to the soap opera, today’s academical interest for tv series shows many great opportunities and some deep contradictions, including the old matter of cultural hegemony which seems to appear once again in the evaluative attitude of some critical approaches.

  8. SonoNet: Real-Time Detection and Localisation of Fetal Standard Scan Planes in Freehand Ultrasound.

    Science.gov (United States)

    Baumgartner, Christian F; Kamnitsas, Konstantinos; Matthew, Jacqueline; Fletcher, Tara P; Smith, Sandra; Koch, Lisa M; Kainz, Bernhard; Rueckert, Daniel

    2017-11-01

    Identifying and interpreting fetal standard scan planes during 2-D ultrasound mid-pregnancy examinations are highly complex tasks, which require years of training. Apart from guiding the probe to the correct location, it can be equally difficult for a non-expert to identify relevant structures within the image. Automatic image processing can provide tools to help experienced as well as inexperienced operators with these tasks. In this paper, we propose a novel method based on convolutional neural networks, which can automatically detect 13 fetal standard views in freehand 2-D ultrasound data as well as provide a localization of the fetal structures via a bounding box. An important contribution is that the network learns to localize the target anatomy using weak supervision based on image-level labels only. The network architecture is designed to operate in real-time while providing optimal output for the localization task. We present results for real-time annotation, retrospective frame retrieval from saved videos, and localization on a very large and challenging dataset consisting of images and video recordings of full clinical anomaly screenings. We found that the proposed method achieved an average F1-score of 0.798 in a realistic classification experiment modeling real-time detection, and obtained a 90.09% accuracy for retrospective frame retrieval. Moreover, an accuracy of 77.8% was achieved on the localization task.

  9. Photo-, sono- and sonophotocatalytic degradation of methylene blue using Fe3O4/ZrO2 composites catalysts

    Science.gov (United States)

    Kristianto, Y.; Taufik, A.; Saleh, R.

    2017-07-01

    In the present work, magnetite material Fe3O4/ZrO2 with various molar ratios was prepared by the two-step method (sol-gel followed by the ultrasonic-assisted method). The as-prepared samples were fairly characterized by various characterization methods, such as X-ray Diffraction (XRD), Vibrating Sample Magnetometer (VSM), Fourier Transform Infrared (FT-IR) and Thermal Gravimetric Analysis (TGA). The catalytic performance of the as-prepared samples was evaluated based on the degradation of methylene blue under UV light, ultrasound and combination of UV and ultrasound irradiation. The results revealed that the sample with Fe3O4:ZrO2 molar ratio of 0.5:1 showed the best catalytic performance under UV, ultrasound and UV + ultrasound irradiation. The degradation of methylene blue follows the order: sonophotocatalytic > sonocatalytic > photocatalytic. In addition, the effect of various scavengers has also been studied. Furthermore, all prepared samples could be used as a convenient recyclable catalyst.

  10. Avaliação da qualidade do sono de estudantes universitários de Fortaleza-CE

    Directory of Open Access Journals (Sweden)

    Márcio Flávio Moura de Araújo

    2013-01-01

    Full Text Available El objetivo de esta investigación fue evaluar la calidad del sueño de los estudiantes universitarios en Fortaleza, Ceará, Brasil. Se realizó una encuesta con los estudiantes de 701 en la Universidad Federal de Ceará (UFC entre marzo y junio de 2011. Se utilizó el índice de la Calidad del Sueño de Pittsburgh (PSQI. La mayoría de los estudiantes tenía una mala calidad subjetiva del sueño (54%, la latencia del sueño y la eficiencia de menos de 15 minutos (60,1% y 65% (99%, respectivamente. La duración del sueño de la muestra fue de 6,3 horas por día (SD ± 1,4 horas (p <0,001. El análisis de los siete componentes del PSQI mostró que una parte sustancial de los estudiantes universitarios encuestados (95,2% tienen mala calidad del sueño. El análisis de datos reveló que una parte sustancial de la universidad investigado (95,3% tenían mala calidad del sueño.

  11. 1 H NMR and sono chemistry: monitoration of elimination and isomerization reactions of diterpenes, catalysed by TFAA

    International Nuclear Information System (INIS)

    Uchoa, Daniel Esdras de Andrade; Silveira, Edilberto Rocha

    1997-01-01

    There are in the literature several papers dealing with the influence of ultrasound over chemical reactions [1-4]. According to Moon, S., the general mechanism of sonochemistry (the chemistry of sound and ultrasound) is not known, but it is generally agreed that the phenomenon of cavitation (formation and collapse of micro-bubbles) is responsible for its chemical effects. Although ultrasound has been known for more than 60 years its application to chemical reactions has not been investigated throughly. (author)

  12. Feature of extradosed PC bridge and its design; Daihenshin keburu PC kyo no tokucho to sono sekkei

    Energy Technology Data Exchange (ETDEWEB)

    Komiya, M. [Japan Bridge and Structure Institute Inc., Tokyo (Japan)

    1997-03-31

    A PC bridge with the eccentricity of the external cable increased by protruding the deviated member to the outside of the beam for more effective use of the external cable is called a `PC bridge with tendons of large eccentricity.` The extradosed bridge of main beam/cable joint type is a PC bridge with the external cable arranged via a tower-shaped eccentric member provided at the intermediate support, and resembles morphologically a cable stayed bridge having a very low tower. There are two types of extradosed bridges, i.e. a type with concrete coated external cable (cable stayed slab bridge) and the other with non-coated external cable (external cable stayed bridge). Features, structural planning and designing of the general external cable stayed bridge are shown. The features are the possession of intermediate characteristics of those of the PC beam bridge and the PC cable stayed bridge from the viewpoints of structural property, workability, economic efficiency, and scenic property. Outline of the plan, selection of structural data, design of the external cable, and structural characteristics in the ultimate state are discussed. 19 refs., 18 figs., 15 tabs.

  13. Studies on the air distribution and thermal performance of the air circulation wall. Part 4. Study on the thermal emissivity of the air circulation layer`s surfaces; Gaidannetsu tsuki koho ni okeru tsuki sonai no netsu tsuki tokusei ni kansuru kenkyu. 4. Tsuki sonai hyomen no hosha tokusei ni kansuru kosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Kamimori, K; Sakai, K; Ishihara, O [Kumamoto University, Kumamoto (Japan)

    1996-10-27

    The thermal and air distribution characteristics of the air circulation wall in a heat-insulated system were grasped using an experimental model. In this paper, the difference in the heat exchange between the wall and air was confirmed based on the radiation on the circulation layer`s surface. In this system, thin air circulation layers with ventilating holes at the top and bottom are attached to the south and north outer walls of a wooden building. This system is a kind of passive solar house that achieves the insolation screening effect and the temperature rising effect based on solar collection. The heat flow in a circulation layer is eliminated by the natural convection heat transfer on the outer wall. The heat flow passing through insulating materials is the heat transfer by radiation. The heat flow based on the in-layer natural convection is increasingly eliminated by the decrease in temperature on the air circulation layer`s surface. The decrease in room surface temperature using aluminum foil and the reflective heat-insulated effect showed that the heat passing through the wall surface decreases as the convection heat transfer in an air circulation layer increases. 6 refs., 20 figs., 3 tabs.

  14. Survey of pollution-resistant plants and their cultivating techniques; Osen busshitsu taisei shokubutsu to sono shokusai gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The reduction of forests due to environmental pollution has been surveyed, to investigate the pollution-resistant plants and solid microorganisms. In Japan, the blight of needle-leaf trees (pine and momi fir) and of Japanese oak has occurred, and blight of some other trees, such as wild cherry trees, Japanese apricot trees, birch, Japanese cedar, cypress and bamboo, has been reported from various regions. In this article, plants reported to be resistant to pollutants are listed, and the physiological features of these plants are described. Furthermore, to develop pollution-resistant plants, reports relating to clarification of the mechanism of resistance development and the genes involved are reviewed. Microorganisms which symbioses for roots support these root functions. They also suppress the activity of pathogenic microorganisms and improve the environment around the roots, thus helping plants to grow normally. The roles played by symbiotic microorganisms and how to utilize these organisms are discussed. Their functions in coping with acid rain and heavy metal pollution, and how to utilize such functions are also discussed. 707 refs., 13 figs., 13 tabs.

  15. Relação entre qualidade do sono e funções cognitivas em pacientes com doença de Parkinson

    DEFF Research Database (Denmark)

    Brito dos Santos, Altair; Campos, Shirley L.; Ribeiro, Sidarta T. G.

    2013-01-01

    Here, we describe the clinical characteristics of patients with Parkinson's disease, as well as study the relationship between sleep quality and cognitive functions. This is a descriptive-analytical cross-sectional study in which we evaluate episodes of depression and anxiety, as well as the state...... of general health, disease progression, sleepiness, sleep quality and cognitive functions of 24 patients with Parkinson's disease without dementia. We found a moderate inverse correlation between memory and sleep disturbances, and a moderate inverse correlation of memory and visuospatial function. We also...

  16. Development and simulation of the air-jack for emergency like a huge disaster; Kyujoyo eajakki no kaihatsu to sono simyureshon

    Energy Technology Data Exchange (ETDEWEB)

    Katsuyama, Kunihisa.; Ogata, Yuji.; Wada, Yuji. [National Institute for Resources and Environment, Tsukuba (Japan); Hashizume, Kiyoshi.; Nishida, Kenjiro. [Nippon Kayaku Corp., Tokyo (Japan)

    1999-02-28

    When a disaster is so huge like Kobe earthquake, every energy line is killed. Even if we want to help the sufferers, we have no energy to move machines to help them. As collapsed houses are very heavy, we need machines to remove collapsed stuff. Explosives include a lot of energy in themselves. So, an air-jack which has explosives inside was developed to remove collapsed stuff on suffered people. A simple air-jack was made and tested. One concrete block, 50cm x 50cm x 50cm, was lifted by the simple air-jack. A simulation of lifting the concrete block was carried out with a programme ANSYS on the super computer. (author)

  17. Effects of mechanical stimulating treatment on self-organization phenomena of materials; Kikaiteki reiki shori. Zairyo no jiko soshikia gensho ni oyobosu sono koka

    Energy Technology Data Exchange (ETDEWEB)

    Hida, M. [Okayama University, Okayama (Japan). Faculty of Mechanical Engineering

    1999-03-31

    The atoms and atom clusters around dislocation cores in crystals or surface layer deformed by mechanical energy are locally excited so as to give rise some chemical reactions and to self-organize their products into a kind of Spatial-Temporal Pattern Formation as a dissipative structure. A famous coupling phenomenon between mechanical and chemical process in solid materials must have been mechanical alloing. This report explains that various mechano-chemical treatments are powerfull method for entraining the solid system into non-equilibrium states and interesting phenomena stimulated by the mechanical self-catalysis reaction causing self-organization. (author)

  18. Hydrogen storage alloy electrode for metal-hydride alkaline storage battery its production method; Kinzoku-suisokabutsu aruakri chikudenchiyo no suiso kyuzo gokin denkyoku oyobi sono seizo hoho

    Energy Technology Data Exchange (ETDEWEB)

    Matsuura, Y.; Nogami, K.; Kimoto, M.; Higashiyama, N.; Kuroda, Y.; Yonezu, I.; Nishio, K.

    1997-03-28

    Recently, it is proposed to employ the hydrogen storage alloy produced by means of rapidly solidifying single roll method, i.e., a method of projecting the molten alloy onto the surface of roll rotating in high speed as for the negative electrode material of the metal hydride alkaline battery. However, the hydrogen storage alloy produced by the single roll method has a heterogeneous grain size. So that the utilization of the hydrogen storage alloy is limited. This invention solves the problem. The rare earth-nickel system hydrogen storage alloy ribbon with average thickness of 0.08 - 0.35 mm is produced by means of single roll method. The grain size of the alloy is over 0.2 micrometer on roll surface side and below 20 micrometers on open surface side. The above said alloy is ground to average particle size of 25 - 70 micrometers to be used for the hydrogen absorbent. In this way, the metal hydride alkaline battery with excellent high rate discharge characteristic at the initial stage of charge-discharge cycle, excellent charge-discharge cycle characteristic, and excellent inner pressure characteristic can be produced. 2 figs., 5 tabs.

  19. Hydrogen storage alloy for battery, manufacturing method and nickel-hydorogen secondary battery; Denchiyo suiso kyuzo gokin, sono seizo hoho oyobi nikkerusuiso niji denchi

    Energy Technology Data Exchange (ETDEWEB)

    Inaba, T.; Sawa, T.; Inada, S.; Kawashima, F.; Sato, N.; Sakamoto, T.; Okamura, M.; Arai, T.; Hasimoto, K.

    1997-04-08

    The invention relates to a hydrogen storage alloy for a battery which has a high electrode capacity, and particularly can realize a long battery life. The hydrogen storage alloy of the LaNi5 type with the general formula: ABx is used in the invention. Here, A comprises La, Ce, Pr and Nd, and La and Nd in A account for 70 to 90 wt % and less than 5 wt %, respectively; B is at least one of the elements selected from Ni, Co, Fe, Cr, Mn, Cu, Al, Ga, Si, Ge, Bi, Sn, In, P, V, Nb, Ta, Mo and W; x shows the atomic ratio in the range, 4.5{<=}x{<=}5.6. Since rare earth elements constituting the alloy, and types and compositions of the elements substituting Ni are properly determined, the hydrogen storage alloy for a battery with excellent hydrogen storage characteristics and corrosion resistance is obtained. When the alloy is used as an anode material, the battery capacity is expanded, the alloy pulverization and deterioration are prevented. 3 figs., 1 tab.

  20. Hydrogen storage alloy electrode of metal hydride alkaline storage battery and its production method; Kinzoku-suisokabutsu arukari chikudenchiyo no suiso kyuzo gokin denkyoku oyobi sono seizo hoho

    Energy Technology Data Exchange (ETDEWEB)

    Matsuura, Y.; Nogami, K.; Kimoto, M.; Higashiyama, N.; Kuroda, Y.; Yonezu, I.; Nishio, K.

    1997-03-28

    Recently, a proposal was made of employing the hydrogen storage alloy produced by means f rapidly solidifying single roll method, i.e., a method of projecting the molten alloy onto the surface of roll rotating in high speed as for the negative electrode material of the metal hydride alkaline battery. However, the hydrogen storage alloy produced by the single roll method has a heterogeneous grain size. This invention solves the problem. The Mm{center_dot}Ni{center_dot}Co{center_dot}Al{center_dot}Mn alloy ribbon with average thickness of 0.08 - 0.35 mm is produced by means of single roll method. The grain size of the alloy is over 0.2 micrometer on roll surface side and below 18 micrometers on open surface side. The alloy is ground to be used for the hydrogen absorbent. The general formula of this alloy is MmR(x) (Mm = mischmetal, R = Ni, Co, Al, Mn). In this way, the metal hydride alkaline battery with excellent high rate discharge characteristic at the initial stage of charge-discharge cycle, excellent charge-discharge cycle characteristic, and excellent inner pressure characteristic can be produced. 2 figs., 5 tabs.

  1. Pain associated with liver biopsies through percutaneous approach under sono-graphic guidance-a cross sectional pilot study in a tertiary care hospital

    International Nuclear Information System (INIS)

    Baig, M.A.

    2015-01-01

    Pain is one of the most common and feared complication of percutaneous liver biopsy under local anaesthesia using sonographic guidance. This observational study was set to judge the intensity of pain felt by adult patients presenting for percutaneous liver biopsy with known/suspected underlying hepatic pathology. Methods: This observational cross sectional study which was piloted on 10% of the original sample size was conducted at Aga Khan University Hospital, Karachi. Study population was the adult patients coming for percutaneous liver biopsy at the Department of Radiology. Descriptive statistics were run, data was checked for normality. Means and Standard deviations were done for continuous variables and where data was skewed, median with inter quartile range was computed. Later data was clumped in categories, frequency and percentages were reported for categorical variables. Graphical representation of data was done. Results: A total of 50 patients were recruited. Minimum pain reported on visual analogue scale (VAS) was 0 and maximum as 4.30% of patients rated 3 and similarly 30% of the people rated 4 on the VAS. Mean pain experienced was 2.7 ± 1.11 and a median of 3 on VAS. This indicates that a minority of patients in our survey had a complaint of mild pain during the procedure. Conclusions: Percutaneous liver biopsy is a very safe procedure and minimal pain was felt by a minority of patients whereas the rest showed satisfaction from the procedure with no post procedural complaints. (author)

  2. Front line of cement technolgy and control. Part 5. ; Baking process and chemical reactions. Cement saisentan sono gijutsu to kanri 5. ; Shosei katei to kagaku hanno

    Energy Technology Data Exchange (ETDEWEB)

    Hirai, M. (Ube Industries, Ltd., Yamaguchi (Japan))

    1990-06-01

    The baking process in cement production means the process that the raw materials which were mixed and pulverized in the raw material preparation process are charged into a reaction furnace which is called kiln, and clinders (intermediate product of cement) are generated. It is the process which affects quality as well as production cost of cement more significantly than anything else. In this article, an outline of the above baking facilities, how the raw materials change and clinkers are generated therein, and how they are controlled are introduced. Clinkers are composed of such products as alite, belite, aluminate and ferrite, etc. which were generated after decomposition reactions of such raw materials as lime stone, clay, silica rock and iron oxide in the above kiln. The essential ponts of the process control which makes the generation reactions of clinker compounds efficiently are such two points as well balanced raw materials to be charged into the baking facilities and stable operation of such facilities. The quality of cement which is required as finished goods is achieved by the quality control at each intermediate process and the quality tests of cement. 5 refs., 10 figs., 2 tabs.

  3. CAE to support a part of supporting technologies-its applications and verifying samples. Shien gijutsu no ittan wo sasaeru CAE sono torikumi to kensho rei

    Energy Technology Data Exchange (ETDEWEB)

    Kobayashi, H. (Polyplastic Co. Ltd., Tokyo (Japan))

    1992-01-01

    Plastic CAE has suddenly being widened their applicable fields recently. On the other hand, since integated program development has also been made worldwidely, currently it is posssible to execute even for shrinkings and warping and warping analysis based on holding pressure analysis and cooling analysis. Polyplastics Company Inc. has paid attention to the usefullness of CAE technologies for engineering plastics from the early times, and in order to utilized them effectively, they have progressed several examinations on CAE software development, improvement of CAE analysis technologies, confirmation and verification of CAE analysis precision, resin data preparations and measuring methods, etc. In this paper, their applications have been introduced mainly by their verification samples such as output sample of FACE-2, which is their originally developped metal mold temperature adjustment design supporting system, and as for verification samples of warping deformation analysis, experimental result of testing metal mold (box type), and reliabilities on the results of measured precision and quantitative analysis of resin data to be used for analysis. 6 refs., 6 figs., 1 tab.

  4. Deregulation for the electric power industry in Japan and the outlook; Nippon no denryoku sangyo no kisei kanwa to sono tenbo

    Energy Technology Data Exchange (ETDEWEB)

    Matsuo, N. [The Institute of Energy Economics, Tokyo (Japan)

    1996-10-01

    The future direction and outlook of the electric power industry in Japan was described in a new systematical framework based on the amendment to the Electric Utility Industry Law. When viewing the deregulation system from a viewpoint of `induction of competition,` comparative assessment may mean competition introduced among electric power companies; establishment of the competitive bidding system by the whole supply business may mean competition introduced into the power generation sector; establishment of the specified electric utility industry system may mean competition introduced into the retailing sector. Further, a system to notify the authority of the price list, rationalization of safety rules, deregulation on the entry into another business, etc. can be interpreted as the spread of a width of discretion on business management. An increase in economic efficiency by cost reduction is expected as an influence of this deregulation, but the subject is how well the deregulation can balance with publicity and social responsibility. Relating to the entry of IPP, there is some anxiety: small scale power sources have high failure rates and difficulty in load frequency control. Moreover, it affects the public benefit in a sense of the apparently worsening air pollution. 12 figs., 1 tab.

  5. Fast sono assisted ferrofluid mediated silver super - Adsorption over magnesium ferrite-copper sulfide chalcogenide with the aid of multivariate optimization.

    Science.gov (United States)

    Rezaei, Ali Asghar; Hossein Beyki, Mostafa; Shemirani, Farzaneh

    2017-07-01

    This research focuses on the development of a fast ultrasonic assisted ferrofluid mediated methodology to obtain the optimum conditions for silver adsorption from aqueous solutions. For this purpose magnesium ferrite-copper sulfide chalcogenide was synthesized and employed as an efficient nanosorbent. The sorbent was characterized with energy-dispersive X-ray spectroscopy (EDX), field emission scanning electron microscopy (FE-SEM), X-ray powder diffraction (XRD) and vibrational sample magnetometry (VSM) techniques. For obtaining the optimal operating conditions of silver adsorption, response surface methodology (RSM) was used. Tests were performed by Box-Behnken design (BBD). The value of optimum conditions for silver adsorption include pH=2.5, adsorbent dosage=10.0mg, sonicating time=1min and ionic strength=2.2%. According optimum conditions, percentage of removal should be 99.34%. With replication of similar experiment (n=6) average percentage of 100±0.95% was obtained for Ag + adsorption which shows good agreement between predicted and experimental results. Silver ion adsorption follow Langmuir model with maximum sorption capacity of 2113mgg -1 . Ultrasonic power helped to prepare ferrofluid and demonstrated that had an important role in better dispersing of it in solution and efficient adsorption of analyte. Copyright © 2017 Elsevier B.V. All rights reserved.

  6. Perché i generi alimentari sono meno costosi nei paesi (europei ricchi? (Why Is Food Cheaper in Rich [European] Countries?

    Directory of Open Access Journals (Sweden)

    Alessandro Podkaminer

    2012-04-01

    Full Text Available Relative to non-food items, food tends to be cheaper in rich, as compared with poor European countries. This tendency cannot be explained in terms of cost developments or foreign-trade considerations. A positive explanation proposed focuses on demand-income-supply interaction. An analysis of a cross-country price-augmented modification of Engel's Law, econometrically specified, indicates that the relative price of food is related positively to the supply of food items and negatively to that of non-food items. This finding is consistent with "agricultural price scissors", and also casts a different light on the nature of economic development and structural change.  JEL Codes: D12, L11, L66, Q11Keywords: Food, Prices

  7. Perché i generi alimentari sono meno costosi nei paesi (europei ricchi? (Why Is Food Cheaper in Rich [European] Countries?

    Directory of Open Access Journals (Sweden)

    Alessandro Podkaminer

    2004-09-01

    Full Text Available Relative to non-food items, food tends to be cheaper in rich, as compared with poor European countries. This tendency cannot be explained in terms of cost developments or foreign-trade considerations. A positive explanation proposed focuses on demand-income-supply interaction. An analysis of a cross-country price-augmented modification of Engel's Law, econometrically specified, indicates that the relative price of food is related positively to the supply of food items and negatively to that of non-food items. This finding is consistent with "agricultural price scissors", and also casts a different light on the nature of economic development and structural change.

  8. Quantitative determination of flame color and its determining factor in hydrocarbon/air laminar diffusion flames; Soryu kakusan kaen ni okeru kaenshoku no teiryoka to sono kettei yoin

    Energy Technology Data Exchange (ETDEWEB)

    Tatsuta, S. [Asahikawa National College of Technology, Hokkaido (Japan); Fujita, O.; Ito, K. [Hokkaido University, Sapporo (Japan)

    1998-08-25

    The color of laminar diffusion flames burning propane, methane and ethylene was determined by chromaticity coordinates (x, y) defined by the CIE 1931 standard colorimetric system. The differences in flame color attributed to burning condition and fuel types were examined with a colorimeter. Spectroscopic measurement and numerical analysis using a simplified radiation model were also carried out to discuss the determining factors of the flame color. The relation between x and y measured on the central axis of the flames was expressed in the experimental equations. The (x, y) in the luminous region plotted on a chromaticity diagram changed along Planckian locus with the burning conditions. The contribution of the thermal radiation of soot particles and the chemiluminescence to the flame color was successfully evaluated by introducing the concept of additive mixture of color stimuli. The (x, y) profiles from the numerical analysis agreed well with the experimental results. 17 refs., 14 figs., 1 tab.

  9. „Perché sono tutti cattivi“: Strategien der Anziehung und Abstoßung in ‚Gomorra – la serie‘

    Directory of Open Access Journals (Sweden)

    Tanja Weber

    2015-05-01

    Full Text Available Der Pay-TV Sender Sky Italia sendet neben Sport vor allem US-amerikanische Fernsehserien, die als Quality TV bezeichnet werden. Inzwischen produziert er auch eigene Serien, die international konkurrenzfähig sein sollen. Dabei setzt er auch bei seiner dritten Produktion Gomorra – La serie auf transmediales Erzählen als Risikominimierungsstrategie, das heißt, der Serie gehen ein erfolgreiches Buch und ein Film voraus. Gomorra – La serie setzt sich darüber hinaus mit der italienischen Tradition, das organisierte Verbrechen darzustellen, auseinander. Dies schlägt sich vor allem in der Figurenzeichnung nieder und führt zu außergewöhnlichen Strategien der Anziehung und Abstoßung.

  10. Study of the heat island phenomenon in large cities and the measures to prevent it; Daitoshi ni okeru heat island gensho to sono taisaku ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Kawasaki, T.; Ishitani, H.; Matsuhashi, T. [The University of Tokyo, Tokyo (Japan). Faculty of Engineering

    1997-01-30

    The paper made an analysis of the heat island phenomenon in the Kanto area using 3-D numerical analysis models and a study on the effectiveness of the measures to prevent it. The models are composed of advection/diffusion models of heat/steam in the wind-velocity field and atmospheric air, heat diffusion models in the underground and undersea, and heat balance models on the ground surface and sea surface. In the calculation, a simulation was conducted of the case of taking the following three measures: the case where the exhaust heat was reduced 30% in the assumed typical day of summer; the case where the heat volume of buildings/trunk roads was reduced; the case where the evaporation efficiency of buildings/trunk roads was raised. The result of the study was as follows: The reduction effect of the exhaust heat is totally large, but precisely observing, some meshes contrarily showed rises in temperature in the suburbs. Also in the case of reducing the heat volume, the same phenomenon occurred, but the effect was large in the center of a city. It was found that the effect was unexpectedly large in the case of increasing the evaporation efficiency. 7 refs., 14 figs., 2 tabs.

  11. Transient tire force and its modeling. Part 2. Camber angle input; Katoteki tire hasseiryoku to sono modeling. 2. Camber kaku nyuryoku

    Energy Technology Data Exchange (ETDEWEB)

    Higuchi, A [Toyota Motor Corp., Aichi (Japan); Pacejka, H

    1997-10-01

    The objective of this study is to understand the transient force and moment characteristics of tires involving side slip and camber and to develop the tire model which is capable of describing those characteristics. Some particular characteristics are found such as non-lagging part in side force response and an apparent peak in aligning torque response to a stepwise camber change. Some aspects on the analogy of turn slip to camber are also discussed. The tire model combines a dynamic part based on the physical aspect using the relaxation length concept, and a steady state part. In combined situations of side slip and camber, an estimation method to determine the transient slip quantities is introduced. 12 refs., 14 figs.

  12. Alterações do sono e prevalência de depressão em pacientes lúpicos em uso de pulsoterapia com ciclofosfamida

    OpenAIRE

    Mesquita, Rafael Carvalho; Souza, Lívia Noronha Coelho de; Bruin, Pedro Felipe Carvalhedo de; Carvalho, Raquel Ribeiro; Medeiros, Marta Maria das Chagas; Rocha, Francisco Airton Castro da; Bruin, Veralice Meireles Sales de

    2007-01-01

    BACKGROUND: Pulse i.v. cyclophosphamide is a therapeutic option in severe forms of systemic lupus erythematosus (SLE). However, the overall toxicity and risk profile are yet to be adequately defined. OBJECTIVE: To evaluate the occurrence of sleep disturbances in SLE patients subjected to i.v. cyclophosphamide. METHODS: We studied thirty consecutive SLE patients (27 female) age range 14 to 53 years (mean 30.5 ± 10 years) that received i.v. cyclophosphamide (mg) (mean 948.27 ± 221...

  13. System approach on solar hydrogen generation and the gas utilization; Taiyo energy ni yoru suiso no seisei oyobi sono riyo system ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Fujii, I; Hirooka, N; Deguchi, Y; Narita, D [Meiji University, Tokyo (Japan)

    1997-11-25

    An apparatus is developed to establish a system which allows utilization of hydrogen safely and easily, and its applicability to a hydrogen system for domestic purposes is tested. The system converts solar energy by the photovoltaic cell unit into power, which is used to generate hydrogen by electrolysis of water at the hydrogen generator, stores hydrogen in a metal hydride , and sends stored hydrogen to the burner and fuel cell units. It is found that a hydrogen occluding alloy of LaNi4.8Al0.2 stores hydrogen to approximately 80% when cooled to 20 to 25degC, and releases it to 10% when heated to 40degC. The fuel cell uses a solid polymer as the electrolyte. The hydrogen gas burner is a catalytic combustion burner with a Pt catalyst carried by expanded Ni-Al alloy. The optimum distance between the burner and object to be heated is 22mm. High safety and fabrication simplicity are confirmed for use for domestic purposes. The system characteristics will be further investigated. 4 refs., 8 figs.

  14. Avaliação da sonolência diurna e qualidade do sono em idosos e sua relação com a qualidade de vida

    Directory of Open Access Journals (Sweden)

    Anna Carolina Rocha Magalhães

    2018-02-01

    Full Text Available Objective: To evaluate daytime sleepiness and sleep quality in the elderly and their influence on quality of life. Methods: Quantitative, cross-sectional and descriptive research. For the evaluation of daytime sleepiness was used the Epworth Sleepiness Scale (ESS, to evaluate sleep quality, the Pittsburgh Sleep Quality Index (PSQI, and to assess the quality of life of the WHOQOL-BREF. For analysis and interpretation of the results, the elderly was divided into groups according to the classification of ESS and PSQI. Results: A total of 128 elderly patients were evaluated. When analyzing ESS, 24.2% of the elderly had a score equal to or greater than 11 points, which indicates Excessive Day Drowsiness (EDD. When the quality of sleep was evaluated, 69.6% of the elderly had a score higher than 5 in the PSQI, which indicates poor quality sleep. When comparing from the ESS, the group of elderly people who did not present EDD with the elderly classified with EDD, a significant difference was observed in the psychological domain of the WHOQOL-BREF, when comparing the elderly with PSQI, there was a significant difference for the physical and environmental domains. Conclusion: The occurrence of excessive daytime sleepiness and poor sleep quality can have an impact on quality of life.

  15. Changes in soil organisms by the application of sludge composits, and their effects. Odei taihirui no shiyo ni tomonau dojo seibutsu no henka to sono eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Niijima, K.; Fujita, K.; Ogawa, M. (Forestry and Forest Products Research Institute, Tsukuba (Japan))

    1993-08-31

    With an objective to utilize sewage sludge more effectively, composted sewage sludge has been applied to seed beds to investigate its effect on soil macrofauna and higher fungi, and its relativity with change in soil organisms, growth of young trees, and soil science. Forty-eight seedling sections, each 5 m [times] 5 m, were made on a seed bed which was applied with Tenryu sludge composts (polymer-based coagulant), several other kinds of sludge composts, fallen leaf composts, and cattle excrement composts at predetermined rates from zero to 20 kg. Each section was planted with 25 three-year-old nursery trees of a kind of oak, black pine, and cypress. As a result, the following findings were obtained: wet weight of larvae of Japanese gold beetles that attack tree roots has increased during the first and second years in the Tenryu sludge applied section, but no longer increased in the third year; the relationship between the other composts and soil macrofauna was not made clear; Scleroderma Cepa PERS, a mycorrhiza bacteria, has been generated in the oak planted section in the second, third and fourth years, with the second year particularly having generated it in a greater amount in proportion with the fertilizer application amount, but the fertilizer effect thereafter is not clear. 24 refs., 6 figs., 9 tabs.

  16. Mercury-free sono-electroanalytical detection of lead in human blood by use of bismuth-film-modified boron-doped diamond electrodes

    Energy Technology Data Exchange (ETDEWEB)

    Kruusma, Jaanus [Institute of Physical Chemistry, University of Tartu, Jakobi 2, 51013, Tartu (Estonia); Banks, Craig E.; Compton, Richard G. [Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, OX1 3QZ, Oxford (United Kingdom)

    2004-06-01

    We report the electroanalytical determination of lead by anodic stripping voltammetry at in-situ-formed, bismuth-film-modified, boron-doped diamond electrodes. Detection limits in 0.1 mol L{sup -1} nitric acid solution of 9.6x10{sup -8} mol L{sup -1} (0.2 ppb) and 1.1x10{sup -8} mol L{sup -1} (2.3 ppb) were obtained after 60 and 300 s deposition times, respectively. An acoustically assisted deposition procedure was also investigated and found to result in improved limits of detection of 2.6 x 10{sup -8} mol L{sup -1} (5.4 ppb) and 8.5 x 10{sup -10} mol L{sup -1} (0.18 ppb) for 60 and 300 s accumulation times, respectively. Furthermore, the sensitivity obtained under quiescent and insonated conditions increased from 5.5 (quiescent) to 76.7 A mol{sup -1} L (insonated) for 60 s accumulation and from 25.8 (quiescent) to 317.6 A mol{sup -1} L (insonated) for 300 s accumulation. Investigation of the use of ultrasound with diluted blood revealed detection limits of the order of 10{sup -8} mol L{sup -1} were achievable with excellent inter- and intra-reproducibility and sensitivity of 411.9 A mol{sup -1} L. For the first time, electroanalytical detection of lead in diluted blood is shown to be possible by use of insonated in-situ-formed bismuth-film-modified boron-doped diamond electrodes. This method is a rapid, sensitive, and non-toxic means of clinical sensing of lead in whole human blood. (orig.)

  17. Tragacanth nanocapsules containing Chamomile extract prepared through sono-assisted W/O/W microemulsion and UV cured on cotton fabric.

    Science.gov (United States)

    Ghayempour, Soraya; Montazer, Majid

    2017-08-15

    Encapsulation is the best method to protect the plant extracts against volatility and instability in the presence of air, light, moisture and high temperatures. Nevertheless, application of encapsulated plant extracts on the textiles requires a low-temperature and high rate processing to avoid from breaking or destroying of capsules. The present paper represents application of nanocapsules prepared by ultrasound irradiation assisted W/O/W microemulsion method on the cotton fabric through UV curing method. The surface and structure of nanocapsules and treated cotton fabric using FESEM and FT-IR indicated the spherical nanocapsules with size of 60-80nm stabilized on the fabric surface in a film layer feature. Also, the treated cotton fabric showed a good release behavior of 96h, a high stability against washing and rubbing tests and a relative good antimicrobial activity with 91, 89 and 94% reduction against S. aureus, E. coli and C. albicans, respectively. Copyright © 2017 Elsevier Ltd. All rights reserved.

  18. Development of multi-filter spectroradiometry; Filter hoshiki ni yoru bunka hosharyo no keisoku hoho to sono supekutoru no hyogen hoho ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Miyake, Y; Aoshima, T; Minoda, T; Kato, T; Kondo, S [Eiko Instruments Trading Co. Ltd., Tokyo (Japan)

    1996-10-27

    Described in this paper is a technique of solar radiation spectroradiometry in which high-resolution wavelength computation adds to a multi-filter method. The solar spectrum upon entering the atmosphere is scattered and absorbed by parameter-constituting elements such as gas, aerosol, cloud particles, etc., and its spectral contour is complicatedly deformed relative to wavelength. Taking advantage of the fact that the scattering and absorbing characteristics of some of the elements are constant relative to wavelength, a simple equation was constructed to enable high-resolution spectrum measurement wavelength-wise, and this compensates for the limit in measurable wavelength that the conventional multi-filter method suffers from. The new method discussed here is not so expensive as the grating method thanks to the employment of filters, is capable of determining spectral radiation quantities with a precision of {plus_minus}5%, and is reduced in terms of the capacity of memory for data storage. The new method enables data collection under various atmospheric conditions that the four seasons present, which the difficult-to-apply and expensive spectroradiometer fails. It is expected that this method will find its use in collecting basic data for the designing of photovoltaic power generation systems, in the study of photochemical reaction in agriculture, and in collecting basic data for daylight lighting. 1 ref., 6 figs., 2 tabs.

  19. Landslide (4). ; Landslide and water-geochemical investigation. part 1. Jisuberi. (4). ; Jisuberi to mizu-chikyu kagakuteki chosa. sono 1

    Energy Technology Data Exchange (ETDEWEB)

    Yoshioka, T [Kyoto Univ., Kyoto (Japan). Disaster Prevention Research Inst.

    1990-08-31

    Laying emphasis on the groundwater quality in landslided areas, origin of dissolved ions in the groundwater, characteristics of water quality at landslided areas, classification of groundwater mass, flow and flow direction of groundwater, relation between water quality and groundwater flow, composition of dissolved gases, isotopes, growing process of water quality, formation of clay minerals and water quality, etc. are described. In general, ions contained in the groundwater originate in rainwater and falling matter; human activity; volcanoes and hot mineral springs; rock and soil; etc. The problems with the quality of water in landslided areas are Na {sup +} and Ca {sup 2} as positive ions and HCO {sub 3} and SO {sub 4}{sup 2 {sup minus}} as negative ions. It can be understood that change in the chemical composition of the groundwater caused by the flow of the groundwater is closely related to the weathering of rocks. Examples of investigation on groundwater flow by chemical injection are introduced. The composition of gases dissolved in groundwater is as important as the dissolved components for the study of the origin and history of groundwater. 34 refs., 16 figs., 7 tabs.

  20. Application of thin-layer chromatography of fat and oil, fatty acid and mineral oil for science education. Yushi, shibosan, koyu no hakuso chromatography to sono kyozaiteki katsuyo

    Energy Technology Data Exchange (ETDEWEB)

    Kawabuchi, K [Ehime Univ., Ehime (Japan); Takechi, Y; Morimoto, M [Ehime (Japan)

    1990-08-20

    In this article, with regard to application of thin-layer chromatography of fat and oil, fatty acid and mineral oil for science education, a study was made mainly on quality finding of n-hexane extracts provided in the law of prevention of water pollution, and separation of hydrolysis products of fat and oil. As a result, the existance of fat and oil, fatty acid and mineral oil in the enviromental water and the hydrolysis process of fat and oil could experimentally be confirmed. This is considered to be useful for studying teaching material on fat and oil. This report deals with the reagents and device, and specifies standard solution, thin-layer plate, spread solvent, spread tank and thermostat, and states, for its operation, the method using enzyme for hydrolysis of fat and oil and the method using potassium hydroxide. It also contemplates on R {sub f} values of fat and oil, fatty acid and mineral oil, etc., as well as spread of fat and oil, oils contained in n-hexane extracts and hydrolysis products of fat and oil. 6 refs., 4 figs., 1 tab.

  1. Studies on sleep patterns and fatigue due to shift work and their work adaptability. Kotai sagyo ni yoru suimin dotai to hiro oyobi sono sagyo tekiosei no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Matsuoka, N.; Yokota, A. (Univ. of Occupational and Environmental Health, Kitakyushu (Japan). School of Medicine)

    1991-01-01

    Studies were made on sleep patterns and fatigue due to shift work and their work adaptability with respect to the following items: (1) With a nurse work system as the object, a survey of rectum temperature, heart rate and rhythm before and after a midnight shift, and sleep at rising in the morning using the OSA survey method; (2) To analyze actual conditions of cumulative fatigue felt by shift workers and fatigue factors, a survey on shift work history, overtime work time, work patterns, symptoms of cumulative fatigue, and and life satisfaction; (3) A survey on daytime sleep record maintained at working places of guards including those of middle or advanced age, and sleep as affected by a nap; (4) A method of improving complains of circadian rhythm disorders because of variations in sleep and emergence rhythms experienced by shift workers, and discussions of usability of light radiation; and (5) Establishment of a technique to indicate effects of psychological burdens and psychogenic stress on visual functions of shift workers using tensions in focal adjustment. 5 figs., 5 tabs.

  2. Efeito imediato e mediato da acupuntura no tratamento de pacientes portadores da Síndrome de Apnéia Obstrutiva do Sono

    OpenAIRE

    Sugai, Gisele Cristina Machado [UNIFESP

    2009-01-01

    STUDY OBJECTIVES: 1 - To investigate the immediate (single session) and mediate (ten sessions) effect of acupuncture over the sleep pattern of patients with moderate obstructive sleep hypopnea apnea (OSHA). 2 - To compare manual acupuncture (MA) and electroacupuncture (EA) with different stimulation frequencies (2 Hz and 10 Hz). 3 - To determine the role of endogenous serotonin in this mechanism. SETTING: Department of Physiology, Sleep Division of Department of Psychobiology, Chinese Medicin...

  3. Numerical analysis of exhaust gas flow during the gas exchange process and the design optimization; Haiki manihorudonai no hiteijo nagare kaiseki gijutsu to sono oyo

    Energy Technology Data Exchange (ETDEWEB)

    Yoshizawa, K; Takeyama, S; Sakai, E; Tanzawa, K [Nissan Motor Co. Ltd., Tokyo (Japan)

    1997-10-01

    A simulation method was developed to estimate exhaust gas flow during the gas exchange process. In this simulation, one dimensional in-cylinder gas flow calculation and three dimensional exhaust gas flow calculation were combined. Gas flow inside the exhaust manifold catalyst during gas exchange was agreed in experiments. A simulation method was applied to select oxygen sensor location. A prediction of the oxygen sensor sensitivity of each cylinder gas was presented. The possibility of selecting oxygen sensor location in the exhaust manifold using calculation was proved. 5 refs., 10 figs., 1 tab.

  4. Sono-leather technology with ultrasound: a boon for unit operations in leather processing - review of our research work at Central Leather Research Institute (CLRI), India.

    Science.gov (United States)

    Sivakumar, Venkatasubramanian; Swaminathan, Gopalaraman; Rao, Paruchuri Gangadhar; Ramasami, Thirumalachari

    2009-01-01

    Ultrasound is a sound wave with a frequency above the human audible range of 16 Hz to 16 kHz. In recent years, numerous unit operations involving physical as well as chemical processes are reported to have been enhanced by ultrasonic irradiation. There have been benefits such as improvement in process efficiency, process time reduction, performing the processes under milder conditions and avoiding the use of some toxic chemicals to achieve cleaner processing. These could be a better way of augmentation for the processes as an advanced technique. The important point here is that ultrasonic irradiation is physical method activation rather than using chemical entities. Detailed studies have been made in the unit operations related to leather such as diffusion rate enhancement through porous leather matrix, cleaning, degreasing, tanning, dyeing, fatliquoring, oil-water emulsification process and solid-liquid tannin extraction from vegetable tanning materials as well as in precipitation reaction in wastewater treatment. The fundamental mechanism involved in these processes is ultrasonic cavitation in liquid media. In addition to this there also exist some process specific mechanisms for the enhancement of the processes. For instance, possible real-time reversible pore-size changes during ultrasound propagation through skin/leather matrix could be a reason for diffusion rate enhancement in leather processing as reported for the first time. Exhaustive scientific research work has been carried out in this area by our group working in Chemical Engineering Division of CLRI and most of these benefits have been proven with publications in valued peer-reviewed international journals. The overall results indicate that about 2-5-fold increase in the process efficiency due to ultrasound under the given process conditions for various unit operations with additional benefits. Scale-up studies are underway for converting these concepts in to a real viable larger scale operation. In the present paper, summary of our research findings from employing this technique in various unit operations such as cleaning, diffusion, emulsification, particle-size reduction, solid-liquid leaching (tannin and natural dye extraction) as well as precipitation has been presented.

  5. Control means of the aerodynamic vibration occured in Parallel of PC cable-stayed bridge; PC shachokyo heiretsu keburu no taifu seishin taisaku to sono koka

    Energy Technology Data Exchange (ETDEWEB)

    Sato, H. [Public Works Research Inst., Tsukuba (Japan); Takeda, T.; Mukai, H. [Kajima Corp., Tokyo (Japan); Oikawa, K. [SE Corp., Tokyo (Japan)

    1996-01-30

    In recent years, the techniques for the typical PC bridges shown in the title have been considerably developed in Japan. However, occurrence of characteristic vibrations of the parallel cables even at relatively low wind speeds are observed in many cases, for which an effective control means is inevitably required. In this report, an investigation of tests on effectiveness of 4 kinds of vibration control means carried out in a wind tunnel and its results are described. In the test, an elastic model of 3-dimension was used for 5 test cases including a case without any control means, and each case was explained and examined in detail. It was revealed that for a damping system, a considerably large damping effect was necessary to restraint the wake galloping, and the cable distance selected to be 1.5 times smaller or 6 times larger than the cable diameter was effective, and while vibration control wires were effective, the adjustment of the cable vibration frequency was ineffective. It was also pointed out that a further verification would be necessary for the latter 2 control systems as no enough experience was yet accumulated in the actual service. 13 refs., 16 figs., 6 tabs.

  6. Wind-induced cable vibrations and countermeasures of cables of PC cable-stayed bridge. PC syachokyo keburu no kaze ni yoru shindo to sono taisaku

    Energy Technology Data Exchange (ETDEWEB)

    Yoneda, M. (Kawada Industries Inc., Tokyo (Japan))

    1994-05-01

    In recent years, long span of cable-stayed bridges is remarkable. The wind-induced cable vibration called as line vibration and wake galloping was given as an important problem not only in the steel cable-stayed bridges but also in the PC cable-stayed bridges. The technical engineers in design of the cable-stayed bridges have many times to confront the problems on the vibration control of cables, it is considered that sufficient understand of the wind-induced vibration and countermeasures for cables of the PC cable-stayed bridges is necessary. Many reports on the countermeasure examples and trend of vibration control centred on cables of the cable-stayed bridges have been published. In this paper, the wind-induced vibration of cables in the cable-stayed bridges was reviewed, the examples of countermeasures of vibration control on cables in the PC cable-stayed bridges was mainly introduced. The remaining tasks and future prospects on vibration control of the PC cable-stayed bridges were described. 14 refs., 13 figs., 4 tabs.

  7. Fundamental study on hydrogen storage with hydrogen absorbing alloys. Operating characteristics of storage tank; Suiso kyuzo gokin wo mochiita suiso chozo ni kansuru kiso kenkyu. Chozo yoki no dosa tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Sekiguchi, S.; Sekiguchi, N.; Tani, T. [Science University of Tokyo, Tokyo (Japan)

    1997-11-25

    Hydrogen absorption by a hydrogen storage (MH storage) is investigated for static characteristics, with a constant current applied to the hydrogen generator, and dynamic characteristics, with a fluctuating current applied to the same simulating actual insolation. In the experiment, alloy temperature (MH temperature) in the storage and a current for the generator are preset, and then automatic measurement is allowed to proceed at 10-second intervals of the differential pressure, hydrogen temperature in the piping, absolute pressure, MH temperature, room temperature, and water tank temperature. It is found as the result of the experiment that absorption performance is improved when the MH storage is cooled; that the mean absorption rate which is 1 without cooling increases to 1.62 at 7degC; that the mean absorption rate changes in proportion to the applied current (introduced hydrogen flow rate); that the rate which is 1 at 32A decreases to 0.53 that at 16A; that the absorption rate is dependent more on the current applied to the storage than the temperature of the heat exchanging medium; and that, even in the presence of fluctuation halfway in the applied current, the total absorption will be equal to a case of constant current application if the total amount of applied current is equal. 2 refs., 7 figs., 5 tabs.

  8. Output characteristic of photovoltaic module on different installing conditions. Comparison with calculated value and measured value; Secchi joken no kotonaru taiyo denchi module no shutsuryoku tokusei. Suchi kaiseki to jissokuchi tono hikaku

    Energy Technology Data Exchange (ETDEWEB)

    Sasaki, T.; Morita, Y.; Iwawaki, H.; Fujisawa, T.; Tani, T. [Science University of Tokyo, Tokyo (Japan)

    1997-11-25

    The paper studied output characteristics of photovoltaic modules different in installation conditions on the basis of the energy balance state. In the study, an energy balance equation was constructed for insolation intensity, heat losses from PV surface/back, and output, in order to calculate cell temperatures in each installation condition. A comparative study was made between calculated results and measured data obtained on the top of the school building. The results indicated the following: The thickness of thermal boundary layer became approximately 27mm at insolation intensity of 800 W/m{sup 2}, ambient air temperature of 25degC, and wind velocity of 0.5m/s. When widening air gap from 20mm to 40mm, the cell temperature decreased 4degC, and the output increased 1.6%. In the case of installing photovoltaic modules on the roof considering the relation between the air gap in the heat balance state and the thickness of thermal boundary layer, heat from PV back was released outside the air gap if widening the air gap to more than 30-40mm. The type with a heat insulating material on the panel back decreased in output from other types. 5 refs., 7 figs., 4 tabs.

  9. Effect of coal rank and mineral matter on gasification reactivity of coal char treated at high temperature; Netsushorishita sekitan char no gas ka tokusei ni taisuru tanshu oyobi kobutsushitsu no eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Morishita, K.; Takei, H.; Harano, A.; Takarada, T. [Gunma University, Gunma (Japan). Faculty of Engineering

    1996-10-28

    In the wide range from brown coal to anthracite, an investigation was made of effects of heat treatment on physical/chemical properties and of coal rank dependence. For the experiment, 12 kinds of coal samples were used, and for heat treatment, the fluidized bed heated by the electric furnace and the infrared-ray gold image furnace were used. To examine characteristics of the heat-treated coal char, conducted were oxygen gasification, TPD measurement, XRD measurement, alkali metal measurement, and pore distribution measurement. The following were obtained from the experiment. The gasification reaction rate of the char heat-treated in the temperature range between 900{degree}C to 1700{degree}C decreases with a rise of the temperature of heat treatment, and the degree of decrease in the rate depends on coal rank. The order of gasification rate between coal ranks depends on the temperature of heat treatment, and the lower the heat treatment temperature is, the more largely the gasification rate is influenced by catalysis of mineral matters included in the coal. As causes of the decrease in gasification rate associated with the rise in temperature of heat treatment, indicated were release of alkali metal having catalysis and decrease of active sites by carbonaceous crystallinity. 6 figs.

  10. Characteristics of mixed culture where one type of microorganism assimilates the metabolite; Isshurui no biseibutsu ga seiseisuru taishabutsu wo betsuno shuruino biseibutsu ga shikashite zoshokusuru kongo baiyo no moderuka to tokusei kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Toyama, M.; Matsunaka, T.; Shimizu, K. [Kyushu Inst. of Tech., Fukuoka (Japan). Dept. of Biochemical Engineering and Science

    2000-11-10

    Unstructure models were developed for a mixed culture where one microorganism assimilates the metabolite produced by another microorganism The model system was a mixed culture using Lactobacillus delbrueckii and Ralstonia erthroprop where the former assimilates glucose and produces lactic acid, and the latter assimilates lactate and produce poly {beta}-hydroxy butyrate (PHB). Performance improvement is shown for the mixed culture over a single culture for chemostat using the model developed. Since the optimal dissolved oxygen (DO) concentration is different for each microorganism, we developed another model which takes into account the effect of DO concentration on the dynamic behavior. Then the optimal DO concentration is obtained for chemostat. Moreover, we developed another model which takes into account NH{sub 3} concentration on the cell grown and PHB production by R. eutropha. Then the optimal time-profile for NH{sub 3} concentration is derived using the maximum principle. It is found that high Phba production could be attained even if NH{sub 3} concentration is not controlled if initial NH{sub 3} concentration is appropriately selected. (author)

  11. Effect of Al content on critical CTOD properties in heat affected zone of C-Mn microalloyed steel. Teitanso teigokin koyosetsu netsu eikyobu no genkai CTOD tokusei ni oyobosu Al ganyuryo no eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Fukada, Y.; Komizo, Y. (Sumitomo Metal Industries Ltd., Osaka (Japan))

    1992-08-05

    Two types of molten alloys specimen with a base of 0.10%C-0.20%Si-1.40%Mn-0.01%Ti system and varied Al content, were studied. The critical crack tip opening displacement(CTOD) properties in heat effected zone(HAZ) of extreme low Al content steel was stable at. extremely low temperature and there was no formation of M-A. Fine ferrite has a texture of [alpha] main body and it has been thought that the the change in the CTOD properties with the variation in Al content has been due to the difference in the texture. In case of Al content steel plate, the interfacial energy has been decreased due to excessive carbon concentration at [gamma] /[alpha] interface, M-A formation has been easier by the suppression of [alpha] transformation. In case of extremely low Al content steel plate, [alpha] transformation has been promoted and cementite deposition has been estimated from a small amount. of left [gamma] of extremely high carbon concentration. As for SH-CCT diagram of extremely low Al content steel plate, compare to Al content steel plate, [alpha] noze has shifted toward shorter time and formation of [alpha] has been easier within the normal welding cooling rate, and microstructures of [alpha] texture have formed in HAZ. 21 refs., 12 figs., 1 tab.

  12. Achievement report for fiscal 1984 on Sunshine Program. Research on liquefaction characteristics different between coal types and on technical physical properties; 1984 nendo tanshu ni yoru ekika tokusei to kogakuteki busseichi ni kansuru kenkyu seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1985-03-01

    Liquefaction characteristics of coal specimens, collected from many locations across the world, are determined so as to make clear the correlations between coal type and liquefaction reactivity. Conducted for this purpose are the analysis of chemical structures of the specimens, liquefaction tests in an autoclave using various catalysts and medium oils, liquefaction tests in a 0.1t/d bench plant, investigation of the constituents of the generated oil and their separation, and the secondary stabilization treatment for the commercialization of the product. The reaction tower is kept under constant conditions, the state of the liquid mixture in the reaction tower is evaluated by tracking the flow of coal out of the reaction tower after switchover from anthracene oil to coal paste, the gas flow in the reaction tower is estimated by tracking time-wise changes in the concentration level of inert gas at the reaction tower outlet port, the inert gas having been injected in pulses into the reaction system operating under the reaction conditions. For the implementation of the above-mentioned steps, a system is designed and constructed for directly collecting samples from the vapor phase section in the reaction tower operating under given reaction conditions (temperature: 400-450 degrees C, pressure 150-300kg/cm{sup 2}), and experiments are conducted to collect gas/liquid equilibrium data in the reaction tower under the given reaction conditions. (NEDO)

  13. Humidity-sensitive characteristics of PbCrO4-PbO thick film elements. PbCrO4-PbO kei atsumaku soshi no kanshitsu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Kaneko, F [Shonan Institute of Technology, Kanagawa (Japan); Nanba, N [Kantogakuin University, Tokyo (Japan)

    1992-12-20

    This paper describes humidity-sensitive characteristics, which depend on the host composition being PbCrO4 or Pb2CrO5, in the system PbCrO4 combined with various oxides, such as Al2O3, Fe2O3, ZrO2, SnO2, TiO2, ThO2, and Ta2O5. In order to confirm the predominant phase over elements in the system PbCrO4-PbO, the effect of composition and microstructure on the humidity-sensitive characteristics of thick film elements were examined. Consequently, it was found that the humidity-sensitivity in low humidity region increased as the host composition of elements changed from hydrophobic PbCrO4 to hydrophilic Pb2CrO5. It was also shown that these results can be interpreted by a humidity-sensitive mechanism proposed for hydrophilic Pb2CrO5. Furthermore, an absorption model of H2O molecules on to the surface of Pb2CrO5 in the PbCrO4-PbO system humidity sensor was provided. 4 refs., 12 figs.

  14. Non-contact evaluation of mechanical properties of electroplated wear resistant Ni-P layer from the velocity dispersion of laser SAW; Laser reiki Rayleigh ha no sokudo bunsan wo mochiita taimamo Ni-P mekkiso tokusei no hisesshoku hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Morikawa, Y.; Cho, H.; Takemoto, M. [Aoyama Gakuin University, Tokyo (Japan). Faculty of Science and Engineering; Nakayama, T. [Kobe Steel Ltd., Kobe (Japan)

    1996-11-01

    We developed a new laser surface acoustic wave (SAW) system and applied this to estimate the mechanical properties of the wear-resistant Ni-P layer electroplated on a stainless steel. The velocity dispersions of Rayleigh wave of the as -plated and heat-treated Ni-P layer were obtained by the one point time domain signal processing. The Ni-P layers with excellent wear resistance produced by the heated treatment higher than 725K were found to show higher Rayleigh velocities than that of the substrate steel, while the Ni-P layer with poor wear resistance showed lower velocities. Young`s moduli of the Ni-P layer, estimated so as the computed velocity dispersion agreed with the measured one, increased with the increase of wear resistance. 10 refs., 9 figs., 2 tabs.

  15. Acoustic excitation of diffusion flames with coherent structure in a plane shear layer.; Effects of acoustic excitation on combustion properties; Soshiki kozo wo tomonau sendan kakusan kaen no onkyo reiki.; Onkyo reiki ni yoru nensho tokusei no henka

    Energy Technology Data Exchange (ETDEWEB)

    Ishino, Y.; Kojima, T.; Oiwa, N.; Yamaguchi, S. [Nagoya Institute of Technology, Nagoya (Japan)

    1993-10-25

    This paper reports on experiments for acoustic excitation of plane shear structured flame. Flows of air separated into the higher velocity side and the lower velocity side by a partition on the center of a flow path merge at the measuring point to form a mixed layer with coherent structure. Fuel is supplied to this mixed layer with the flows so adjusted that the generated flame will attach to the partition on the lower velocity side. Acoustic excitation (at a sound pressure level of 100 dB to 120 dB) is performed in a speaker fitted on a wall on the higher velocity side. The paper mentions the results of the experiments as follows: the acoustic excitation produces such changes to diffusion flame in the plane shear layer as shorter flame and blue flame combustion and clarification of flame structures; as seen from spectral characteristics of temperature change in the flames, a flame acoustically excited strongly presents remarkable improvements in periodicity of the structure; as seen from sound pressure distribution in the flow direction at the measuring point, the flame zone of the flame acoustically excited strongly is positioned at the middle of the node and loop of a standing wave. 6 refs., 9 figs., 1 tab.

  16. Relation between front suspension layout and handling performance. Analysis depending on the Taguchi method and ADAMS; Front suspension layout to soda tokusei no kankei ni tsuite. Kiko kaiseki gengo wo mochiita hinshitsu kogaku ni yoru kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Okada, K [Daihatsu Motor Co. Ltd., Osaka (Japan)

    1997-10-01

    A variation of suspension layout gives an influence to the vehicle dynamics. Examined the suspension layout variation to make the handling performance change small. Analyzed the effect of suspension layout variation about steering response delay and gain besides the tire wear effect and movable load. 3 refs., 12 figs., 4 tabs.

  17. FY 1974 Report on results of Sunshine Project. Study on physicochemical properties of rocks in geothermal districts; 1974 nendo chinetsu chitai ni okeru ganseki no butsuri kagakuteki tokusei ni kansuru kenkyu seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1975-03-01

    The geothermal district is characterized by distributions of high temperature and hot water. The beds and rocks in these areas are characteristically altered by these conditions. It is an object of this research and development project to clarify how properties of the beds and rocks in these areas, exposed to the characteristic physicochemical conditions, differ from properties of those in other areas. There are may rock properties. In this project, the studied properties are centered by those used for physical exploitation (or geophysical methods), e.g., electrical properties (electrical exploitation), magnetic properties (magnetic exploitation), and thermal conductivity (measurement of heat flow rates and geothermal gradients). The FY 1974 project covers pigeonholing the basic data, establishment of the experimental procedures, and measurement of water quality characteristics and temperature distributions (geothermal temperature gradients) at the test site. This paper reports the results categorized by (I) measurement of rock resistivity and effects on moisture content on this property, (II) properties of water in the geothermal district (Yahata-daira District), and (III) relationships between rock thermal conductivity and other properties. (NEDO)

  18. Studies on the hydroprocessing of deashed oil. 10. ; Comparison of the reaction performance between pilot plant and BSU. Deashed oil no suisoka bunkai hanno ni kansuru kenkyu. 10. ; Pilot to bench hanno sochi no hanno tokusei no hikaku

    Energy Technology Data Exchange (ETDEWEB)

    Hijiriyama, M.; Kaneko, T. (Mitsubishi Kasei Co., Tokyo (Japan)); Kageyama, Y. (Nippon Brown Coal Liquefaction Co. Ltd., Tokyo (Japan))

    1990-11-29

    The secondary hydroprocessing process in the two-stage hydrogenating liquefaction equipment under development at Nippon Brown Coal Liquefaction Company uses a fixed bed system. This paper describes operation of a bench reaction equipment using catalyst used in the pilot plant to compare it with fresh catalyst, and compare characteristics of the bench scale equipment with those of the pilot reactor. The catalyst is Ca-Ni-No/Al2O. The reaction was carried out in a gas-liquid downward parallel-flow fixed-bed reactor using deashed oil (DAO) with the same material as that used in the pilot plant and the same equilibrium solvent. The experiment result indicates that the used catalyst had its activity fallen below the fresh catalyst, but its temperature dependence was identical, and the selectivity on products of both catalysts was also identical. The result of reactions in the bench scale equipment clarified that the relationship between the DAO conversion rate and denitrogenation activity and the relationship between fa and H/C in the products are in good agreement, and that there is no difference in reaction selectivity. 5 refs., 6 figs., 1 tab.

  19. Effects of short fiber reinforcement and mean stress on tensile fatigue strength characteristics of polyethersulfone; Tansen`i kyoka porieterusaruhon no hippari hiro tokusei ni oyobosu heikin oryoku no eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Furue, H.; Nonaka, K. [Mechanical Engineering Lab., Tsukuba, Ibaraki (Japan)

    1996-01-15

    Thermoplastics are often reinforced with short fibers with aims of improvement of their strengths, rigidities and hardness or maintenance of their dimensional stabilities. Such short fiber reinforced plastic materials have more expectation for high performance plastics. Authors already examined of some effects of reinforced fiber and of orientation in injection molding on flexural fatigue characteristics of the injection-molded high performance thermoplastic materials. However, the examination of short fiber reinforced effects on fatigue strength characteristics was not always sufficient. In this study, in order to obtain a guiding principle for fatigue resistant design of the short fiber reinforced injection molding materials, polyethersulfones (PES) was examined on its tensile fatigue strength and an effect of short fiber reinforcement for improvement of its fundamental dynamic properties on its fatigue characteristics. Especially, its fatigue life characteristics was elucidated mainly on relationship of mean stress, stress amplitude and number of repeating fracture in tensile fatigue behavior. 10 refs., 15 figs., 2 tabs.

  20. Report on the Sunshine Project in fiscal 1990. Studies on liquefaction characteristics by coal types and on engineering properties; 1990 nendo tanshu ni yoru ekika tokusei to kogakuteki busseichi ni kansuru kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1990-07-01

    This paper describes the achievements at the Government Industrial Development Laboratory, Hokkaido in the Sunshine Project in fiscal 1990. Surveys were carried on different catalytic activities for co-liquefaction of various types of coals. The Ru system was found preferable in acquiring fatty family products of low boiling points. Reactions of co-liquefaction constituents do not progress independently, but have positive interaction. Adding Ru is effective in accelerating hydrogenation of condensed aromatic rings and hydrogenation of cleaving nucleus, but in view of the hydrogenating decomposition capability, the Mo-system may be better. In a liquefaction plant test, diesel oil was manufactured by reforming and improving the Yallourn coal light oil. However, the oxygen content was too high, aggravating the temperature distribution control in catalyst bed, and not having achieved the intended denitrification rate. Discussions were given on co-liquefaction of the depressurization residues of Cold Lake (CLVB[vacuum bottom])/Athabasca (ATVB) and Battle River coal. The CLCVB and ATVB were turned into lower molecules easily through hydrogenation treatment. The reaction characteristics reflected the characteristics of medium oil. Depolymerization of coal has progressed faster in ATVB. In the study on the engineering property values, discussions were given on behavior of solid particles in a bubble column, and gas hold-up of slurry. (NEDO)

  1. Measurement method of moving vehicle in the magnetic levitation and propulsion system using high-Tc superconducting bulks; Koon chodendo barukutai wo riyoshita fujo suishin shisutemu no suishin tokusei keisoku shuho

    Energy Technology Data Exchange (ETDEWEB)

    Fuwa, Y.; Mizuma, T.

    1999-06-07

    The transportation system using simple magnetic levitation system got in the combination of high-temperature superconductivity bulk body and permanent magnet, which caught a quantum magnetic flux, is devised in great numbers, and the model equipment has also been manufactured. In the meantime, a grasp of levitation and guide characteristics is necessary for the case in which this levitation system is applied to the simple individual transportation system, and the measurement of the levitation characteristics is indispensable for the reason. In the conventional research, the measurement of the levitation characteristics has not been very much made. There was due to be no technique which measured kinetic characteristics of noncontacting surfacing and running travel body. In this study, measuring method for measuring these levitation characteristics was devised, and it was applied to actual measurement by the production of the model test equipment. Through this measurement, the purpose of this study is to show with that it is applicable for the real test equipment as this measuring method judges possibility of application to simple transportation system. (NEDO)

  2. Investigation on the dynamic response and strength of very long floating structures by beam modeling on an elastic foundation; Dansei shishojo no hari model ni yoru chodai futai kozo no doteki tawami kyodo tokusei ni kansuru kosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Tsubogo, T.; Okada, H. [University of Osaka Prefecture, Osaka (Japan). Faculty of Engineering

    1997-08-01

    A very large floating structure was replaced with the beam on an elastic foundation to examine the response characteristics in waves. Another evidence was regularly and numerically given for the basic characteristics of a very large floating body Suzuki found. New information was also obtained. The frequency response is mainly classified into a wave number control area and proper frequency control area when buoyancy elasticity exists. When the buoyancy structure is long and flexible, the proper frequency becomes continuous and the frequency control area becomes a resonance area. In the wave number control area, the Suzuki`s characteristic wave number becomes a control parameter, and various characteristic values are indicated by characteristic wave numbers. The response in the wave number control area becomes quasi-static when the distribution mass of buoyancy is fully small. The design in which the distribution mass of buoyancy is fully large must be avoided. In the displacement amplitude, the mass on the free end is severest. The proper frequency of vertical vibration relatively moves to the high-frequency side when buoyancy is considered as an elastic foundation. Attention must be thus paid to the proper frequency of vibration on the horizontal surface. 9 refs., 12 figs., 3 tabs.

  3. Analysis of transient thermal behaviors during the charging process in stratified heat storage tanks. 2nd Report. Effects of characteristic parameters; Seiso chikunetsu sonai deno juten katei no kato netsuteki kyodo ni kansuru kaiseki. 2. Tokusei inshi no eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Yoo, H; Hong, H; Pak, E

    1997-11-25

    The mixing effect deteriorates performance in a stratified heat storage tank. In the present study, the effect of characteristic factors during the charging process was analyzed, based on the analytical solution in the previous study in which a strict boundary condition was applied and a mixing effect was included. Also, the usefulness of the solution was verified and the method of application to a real system was examined by comparing it to other experimental results. It was concluded that the depth of the perfectly mixed region is dominant unless the Peclet number is very small. 10 refs., 8 figs.

  4. 3Wave propagation in rock samples under medium and low temperature conditions. Characteristics of methane hydrate-BSR phenomena; Chu teion ryoiki ni okeru ganseki shiryo no hado denpa tokusei. 1. Methane hydrate BSR gensho no kosatsu suitei

    Energy Technology Data Exchange (ETDEWEB)

    Rokugawa, S; Kato, Y; Matsushima, J; Sano, A [The University of Tokyo, Tokyo (Japan). Faculty of Engineering

    1997-10-22

    In relation to sea-bottom pseudo reflection face and methane hydrate in seismic exploration records, fundamental experimental studies have been made. In order to get a handhold to elucidate phenomena accompanying methane hydrate, the studies have investigated wave propagation behavior of rock samples and sandy sediments under medium and low temperature conditions. The experiments have used a constant-temperature cooling water circulating equipment to control temperatures of each sample. The samples were placed in a cooler box with the vibration transmitter and receiver fixedly installed, and changes of the waves against temperature change were measured. Sand-stones and two kinds of tuffs were used as rock samples for the measurement. Artificial sand sample soaked in water was used as a substitute for a methane hydrate layer. As a result of the experiments, the relation between the hydrate layer and the gas layer was comprehended. In addition, the blanking phenomenon was thought occurring as a result of the nearly whole substance presenting the speed of ice due to freezing of the sediments, rather than by what is described in the ground homogeneousness theory. 5 refs., 9 figs.

  5. Estimation of site effects in Higashinada Ward, Kobe City using aftershock records of the 1995 Hyogo-Ken Nanbu Earthquake; Hyogoken nanbu jishin no yoshin kiroku wo mochiita Kobeshihigashinadaku no jiban zofuku tokusei no hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Kurita, K.; Yamanaka, H.; Seo, K. [Tokyo Inst. of Tech. (Japan)

    1998-07-30

    Source spectra and site effects are separated using the aftershock records, and the characteristics of short period earthquake motion in Higashinada Ward, Kobe City including the area to the south of seismic intensity 7 area are investigated placing emphasis on how far the site effects can be explained by 1-D ground structure. The shape and amplitude of the site effect of KNN and KYC located outside the seismic intensity 7 area can be explained fairly well by 1-D multiple reflection theory of S wave. However, peaks near 3 to 4Hz of KNN and UOZ in seismic intensity 7 area can not be explained. This suggests that the site effects of seismic intensity 7 area obtained by the aftershock records might include 2-D effects of underground structure. Inversion is performed using site effects as the objective functions to determine S wave velocity structure and Qs in the sedimentary layer. S wave velocity structure shows no systematical difference from those of the past models. 22 refs., 13 figs., 2 tabs.

  6. Effect of intermolecular cohesion on coal liquefaction. 3. Reactivity of oxygen methylated coal; Sekitan teibunshika hanno ni okeru bunshikan gyoshuryoku no koka. 3. O-methyl ka tan no hanno tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Sasaki, M.; Nagaishi, H.; Yoshida, T. [Hokkaido National Industrial Research Institute, Sapporo (Japan)

    1996-10-28

    The reactivity of oxygen methylated coal was studied to control hydrogen bond in bituminous coal liquefaction and intermolecular cohesion such as van der Waals force. In experiment, crushed and dried Illinois coal of 100mesh or less was used as specimen, and oxygen methylated coal was prepared by Liotta`s method using tetrabutylammonium halide. Coal liquefaction was conducted in an electromagnetic agitation autoclave using tetralin solvent under initial hydrogen pressure of 100kg/cm{sup 2} while heating. The molecular weight distribution of the products obtained was measured by gel permeation chromatography (GPC) analysis. The experimental results are as follows. The effect of intermolecular cohesion in bituminous coal on the reactivity is mainly derived from decomposing reaction from preasphaltene to oil. Yields of oil fraction by methylation increase corresponding to release of intermolecular cohesion. Since the thermal release is promoted with temperature rise, the difference in yield due to different treatments decreases. 5 refs., 3 figs., 1 tab.

  7. Analysis of the relationship between the coal properties and their liquefaction characteristics by using the coal data base; Tanshu data base ni yoru tanshitsu to ekika tokusei no kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Kanbayashi, Y.; Okada, K. [Coal Mining Research Center, Tokyo (Japan)

    1996-10-28

    The relationship between coal properties and liquefaction or gasification characteristics was analyzed by using the analysis and test results and liquefaction characteristics in the coal data base. On liquefaction reaction, the close relation between an oil yield and coal constituent composition or a coal rank is well-known. Various multivariable regression analyses were conducted by using 6 factors as variables such as calorific value, volatile component, O/C and H/C atomic ratios, exinite+vitrinite content and vitrinite reflectance, and liquefaction characteristics as variate. On liquefaction characteristics, the oil yield of dehydrated and deashed coals, asphaltene yield, hydrogen consumption, produced water and gas quantities, and oil+asphaltene yield were predicted. The theoretical gasification efficiency of each specimen was calculated to evaluate the liquefaction reaction obtained. As a result, the oil yield increased with H/C atomic ratio, while the theoretical gasification efficiency increased with O/C atomic ratio. 5 figs., 1 tab.

  8. Three-dimensional analysis of internal flow characteristics in the injection nozzle tip of direct-injection diesel engines; Sanjigen suchi kaiseki ni yoru DI diesel kikan no nenryo funsha nozzle nai ryudo tokusei no kaimei

    Energy Technology Data Exchange (ETDEWEB)

    Ogawa, H; Matsui, Y; Kimura, S [Nissan Motor Co. Ltd. Tokyo (Japan)

    1997-10-01

    To reduce the exhaust emissions and fuel consumption of direct-injection diesel engines, it is essential to optimize the fuel injection equipment closely related to combustion and emission characteristics. In this study, three-dimensional computation has been applied to investigate the effects of the injection nozzle specifications (e.g., sac volume, round shape at the inlet of the nozzle hole) and needle tip deviation on internal flow characteristics. The computational results revealed that the effects of the nozzle specifications and needle tip deviation with a smaller needle lift on internal flow characteristics and a general approach to optimize the injection nozzle specifications were obtained. 3 refs., 10 figs., 1 tab.

  9. Reduction of belt CVT gear noise by gear train modification. Optimize vibration characteristics of gear train; Belt CVT no gear noise teigen gijutsu. Gear train shindo tokusei no saitekika

    Energy Technology Data Exchange (ETDEWEB)

    Arimatsu, M; Kawakami, T [Nissan Motor Co. Ltd., Tokyo (Japan)

    1997-10-01

    With the reduction of vehicle noise, the requirements for an efficient method to reduce transmission gear noise have become stronger yearly. So far efforts to reduce gear noise have generally focused on ways of improving the gears themselves. In addition to these traditional methods, it proved very beneficial to us to optimize the gear train structure. Nissan has just released the new Belt CVT for 2.0L Front wheel drive vehicles. We have been analyzing vibration of the gear train by using a finite element model since the early development stage, and we could achieve the quiet gears effectively. 2 refs., 9 figs.

  10. Spray characteristics of dimethyl ether (D.M.E.) as on alternative fuel for diesel engine; Daitai diesel nenryo to shite no dimethyl ether (D.M.E.) no funmu tokusei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Wakai, K; Nishida, K; Yoshizaki, T; Hiroyasu, H [Hiroshima University, Hiroshima (Japan)

    1997-10-01

    D.M.E. which was paid attention to as on alternative fuel for a diesel engine, was injected by using Bosch type injection pump and a hole nozzle into a high pressure and high temperature vessel. The spray was observed by using schlieren photography. Spray characteristics, such as, the tip penetration, the cone angle and the volume of the spray were and were compared with a diesel fuel spray. The following thing, and so on were found out as a results. The spray angle of the DME spray of atmosphere pressure Pa=0.1Mpa spreads out large in comparison with the diesel fuel spray, and the way of the change by the pressure is contrary to the case of the diesel fuel spray. 3 refs., 6 figs., 1 tab.

  11. Injection and spray characteristics of a variable orifice nozzle applied the jerk type fuel injection pump for DI diesel engine; Jerk shiki nenryo funsha pump wo mochiita kahen funko nozzle no funsha funmu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Hasegawa, T; Matsui, K; Iwasaki, T; Kobayashi, T [Zexel Corp., Tokyo (Japan); Matsumoto, Y [The University of Tokyo, Tokyo (Japan)

    1997-10-01

    A Variable Orifice Nozzle (VON) by changing a cross-sectional area of the nozzle injection hole, for improving a rate of injection and injection duration, has been developed to study its injection and spray characteristics. The nozzle geometry was optimized to analyze a nozzle internal flow by computational method. Results show that, injection and spray pattern responded to the nozzle orifice cross-sectional area which is changing larger to smaller in the part load range. This results suggest to contribute a combustion improvement which decreasing NOx and soot. 14 refs., 10 figs.

  12. Study of an optimization of regeneration for an absorbent used in the solar desiccant cooling system; Taiyonetsu riyo desiccant reibo ni mochiirareru kyushuzai saisei tokusei no saitekika ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Saito, Y [Osaka Institute of Technology, Osaka (Japan)

    1997-11-25

    A desiccant cooling system uses concentrated aqueous solution of an absorbent to reduce humidity, hence the resultant absorbent solution becomes dilute. Regeneration of the dilute solution uses solar heat, where the regeneration characteristics are affected by solution temperature, vapor pressure, water content, air-liquid flow rate, and other factors. Therefore, mutual relationship among these different factors were investigated, and an optimum operating condition was discussed. The regeneration characteristics of the absorbent is strongly affected by temperature of triethylene glycol (TEG). This is because vapor pressure, Ps, in the TEG aqueous solution increases as the TEG temperature rises. This means that preheating the solution is effective in regenerating the absorbent. As the regeneration progresses, the water content, Ww, decreases, and the regeneration rate decreases. This is because of reduction in the Ps in association with decrease in the Ww of the TEG. This suggests that it is important in the absorbent regeneration to reduce flow rate of the TEG aqueous solution as low as possible. Raised air temperature reduces difference in vapor partial pressure between the TEG and the air, resulting in reduced regeneration rate. 5 refs., 9 figs.

  13. Thermal infrared spectra of surface rocks. Comparison of in the laboratory, in situ, and remote sensing data; Chihyo ganseki no netsusekigaiiki bunko tokusei. Chijo sokutei data to remote sensing data no hikaku

    Energy Technology Data Exchange (ETDEWEB)

    Ninomiya, Y; Matsunaga, T [Geological Survey of Japan, Tsukuba (Japan)

    1996-10-01

    An ASTER (advanced spaceborne thermal emission and reflection radiometer) is one of the image sensors. It is to be installed in an earth survey polar orbit platform satellite, EOS-AM1, which is to be launched in 1998, and it is going to start its operation. Data observed by the thermal infrared remote sensing of ASTER include the spectral emissivity, and the spectral emission reflectivity which is expressed by the function of temperature. It is required to overcome technical problems how to extract the spectral emissivity from the observed data. The spectral emissivity extracted from the remote sensing data by the MMD method, measured for samples collected in Cuprite area, Nevada, and/or measured at sampled points were compared to each other and discussed. The hemisphere spectral reflectivity, which is indirect spectral emissivity, agreed well with the direct spectral emissivity. Data suggesting the establishment of Kirchhoff`s law were obtained even for the weathered samples. The spectral emissivity derived from the remote sensing data by the MMD method was in harmony with the spectral characteristics measured strictly on the ground. 14 refs., 3 figs.

  14. Study on characteristics of response to nodal vibration in a main hull of a large-size ferry boat; Ogata feri no shusentai yodo oto tokusei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Takimoto, T; Yamamoto, A; Kasuda, T; Yanagi, K [Mitsubishi Heavy Industries, Ltd., Tokyo (Japan)

    1996-04-10

    Demand for reduction in vibration and noise in large-size ferry boats has been severer in recent years. On the other hand, vibration exciting force in main engines and propellers is on an increasing trend in association with increase in speed and horsepower. A large-size ferry boat uses an intermediate-speed diesel engine which has high vibration exciting frequency. Therefore, discussions were given on characteristics of response to nodal vibration in a main hull induced by primary internal moment in a main engine in a large-size ferry boat mounting an intermediate speed main engine. Results of detailed vibration calculations, vibration experiments using an actual ship, and results of measurements were used for the discussions. Natural frequency for two-node vibration above and below the main hull was set for an equation of estimation such that the whole ship is hypothesized to have been structured with beams having the same cross section according to the Todd`s equation, and effect of rigidity of the long structure can be evaluated. Parameters were derived by using the minimum square method that uses the measured natural frequency of the ship A through the ship E among large-size ferry boats. The derived result may be summarized as follows: this equation of estimation has an estimation error of about 5% against the natural frequency for nodal vibration above and below the main hull; and this equation of estimation has an estimation error of about 30% against the acceleration in the vertical direction at the end of the stern. 2 refs., 11 figs., 1 tab.

  15. Aliasing characteristics of tau-P transform and is application to signal and noise separation; Tau-P henkan no aliasing tokusei to hakei iji wo koryoshita S/N bunri

    Energy Technology Data Exchange (ETDEWEB)

    Kawabuchi, H; Rokugawa, S; Matsushima, J; Ichie, Y [The University of Tokyo, Tokyo (Japan); Minegishi, M; Tsuburaya, Y [Japan National Oil Corp., Tokyo (Japan). Technology Research Center

    1997-05-27

    With respect to the tau-P transform method as a signal and noise (S/N) separation technology used in seismic exploration using the reflection method, a discussion has been given on conditions for the post S/N separation by the tau-P transform to function more effectively. Averaging the energy in performing the tau-P transform makes the wave energy scatter to a certain range. As a result, an aliasing phenomenon appears, in which noise is superimposed on the post-processing record. As a result of the discussion, it was verified that satisfying the two equations of G. Turner is effective in order to reduce the aliasing and maintain the relative amplitude. However, in actual calculation accuracy, waveform change was recognized to some extent, particularly amplification of events in low frequencies, and low restorability in higher frequencies. It was also observed that a method to give the tau-P region a two-dimensional Fourier transform and perform the same processing as an f-k filter can remove aliasing more simply and effectively than the HVF, and improve the S/N ratio maintaining the amplitude at the current level. 5 refs., 13 figs.

  16. Model experiment on change of seismic properties of a fracture caused by injecting/draining water; Chusui/haisui ni yoru kison kiretsu no dansei denpa tokusei no henka ni kansuru model jikken

    Energy Technology Data Exchange (ETDEWEB)

    Watanabe, T; Koizumi, T; Sassa, K [Kyoto University, Kyoto (Japan). Faculty of Engineering

    1997-05-27

    Effect of water injection/draining on elastic waves penetrating through cracks is examined by measuring elastic waves before, during, and after the injection/draining of water into/from cracks in presence in granite. Two blocks of rock, with their crack-containing surfaces in contact with each other, are placed in a vessel, and water injection/draining is done through a hole on a vessel bottom side so that water will penetrate into the cracks. When the blocks are dry, there is almost no contact between the cracks, and so no crack penetrating waves are observed. Crack penetrating waves are produced when water is injected, and the position of the receiver sensing the penetrating waves changes as the water level rises. When the water level is lowered from the high water level, the waveform changes again as the level changes. The change in waveform is not so remarkable, however, as that observed during water injection thanks to the water residual in the cracks. It is now inferred that crack investigation is more effective when it is carried out with water being injected into dry cracks. The difference produced between the dry state and wet state when water is injected into dry cracks is used to detect the presence of cracks in this experiment, and this may be applied also to the investigation of cracks in the shallow part of the ground. 4 refs., 11 figs.

  17. Study on the characteristics of earthquake ground motion in the Hanshin area based on microtremor measurements; Bido kansoku ni motozuku Hanshin chiiki no jiban shindo tokusei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, H; Seo, K; Yamanaka, H [Tokyo Institute of Technology, Tokyo (Japan)

    1997-05-27

    The Hyogoken-nanbu earthquake in 1995 was a local earthquake that has hit directly a large urban area, having caused damages the greatest since the War mainly in the city of Kobe. The present study has noticed the areas of Sumiyoshi, Nada Ward, Kobe City and Nanbu, Nishinomiya City where damages show different distribution; elucidated the characteristics of earthquake ground motion based on microtremor measurements; and discussed the relation thereof with the earthquake damage distribution. It was verified that microtremors and seismic motions are in rough agreement in the Sumiyoshi area, by comparing and discussing the spectrum ratio between the microtremors and the seismic motions. No correspondence was recognized in the Sumiyoshi area between distribution of the average microtremor spectrum ratio with cycles of 0.2 to 0.8 second and distribution of damages caused by the Hyogoken-nanbu earthquake. The ground characteristics evaluation alone is insufficient to explain distribution of the damages in a relatively wide range in the city of Nishinomiya, for which effects of distance decay should be taken into consideration. 6 refs., 7 figs.

  18. Heat and fluid flow properties of circular impinging jet with a low nozzle to plate spacing. Improvement by nothched nozzle; Nozzle heibankan kyori ga chiisai baai no enkei shototsu funryu no ryudo dennetsu tokusei. Kirikaki nozzle ni yoru kaizen kojo

    Energy Technology Data Exchange (ETDEWEB)

    Shakouchih, T. [Mie University, Mie (Japan). Faculty of Engineering; Matsumoto, A.; Watanabe, A.

    2000-10-25

    It is well known that as decreasing the nozzle to plate spacing considerably the heat transfer coefficient of circular impinging jet, which impinges to the plate normally, increases remarkably. At that time, the flow resistance of nozzle-plate system also increases rapidly. In this study, in order to reduce the flow resistance and to enhance the heat transfer coefficient of the circular impinging jet with a considerably low nozzle to plate spacing, a special nozzle with notches is proposed, and considerable improvement of the flow and heat transfer properties are shown. The mechanism of enhancement of the heat transfer properties is also discussed. (author)

  19. Improvement of low temperature oxidation resistance in MoSi{sub 2}-oxides composites; Sankabutsu no fukugoka ni yoru MoSi{sub 2} zairyo no teion sanka tokusei no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Jiang, W.; Uchiyama, T. [Riken Corp., Saitama (Japan)

    1999-11-15

    MoSi{sub 2}-oxides composites using fine aluminosilicate powder (< 0.2{mu}m) have demonstrated excellent low temperature oxidation resistance and thermal shock resistance. These properties strongly depend on microstructural morphology and are obtained in composites that network-structures of both phases of MoSi{sub 2} and oxides are developed, i.e., in composites with oxides of 20 {approx} 40 vol. %. When one phase is independently dispersed in the other phase, on the other hand, problems of low temperature oxidation and thermal shock occur. The low temperature oxidation problem occurs in the composites with oxides less than 15 vol. % and the thermal shock problem occurs in the composites with oxides more than 50 vol. %. These results will contribute to material design approaches for high temperature structural applications of MoSi{sub 2}. (author)

  20. Improvements of room temperature tensile properties in cast TiAl-Fe-V-B alloy by microstructural control; Fe, V, B tenka TiAl gokin no soshiki seigyo ni yoru joon hippari tokusei no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Nishikiori, S.; Matsuda, K. [Ishikawajima-Harima Heavy Industries Co. Ltd., Tokyo (Japan)

    1998-05-01

    Conditions of homogenization to follow the HIP (hot isostatic press) treatment of the TiAl alloy are tested and discussed for the optimization of the relationship between mechanical properties and the structure resulting from heat treatment. Fe, V, and B are added for improved castability to a TiAl alloy newly developed in this report, and this allows {beta} precipitation to take place which does not occur in the two-element alloy. Attention is paid to this {beta} phase, and the effect of homogenizing conditions and the amount of oxygen is investigated from the metallographic point of view. Some findings obtained are mentioned below. The {beta} phase size 30-50{mu}m emerges in the vicinity of {gamma} grains, containing more Fe and V in the solid solution state than the other structural phases. The {beta} phase rich in Fe and V concentration is high in Vickers hardness, and is supposedly brittle at room temperature. The added oxygen reduces the amount of {beta} phase precipitation for the stabilization of the {alpha} phase. The TiAl alloy containing Fe, V, and B exhibits a duplex structure after HIP treatment and the homogenization process to follow. It has a tensile strength of 550MPa, proof stress of 390MPa, and elongation of 1.80%, on the average at room temperature. 14 refs., 10 figs., 1 tab.

  1. Fiscal 1999 research result report. Research on improvement of boiling heat transfer characteristics by photocatalyst wall; 1999 nendo hikari shokubai hekimen ni yoru futto netsu dentatsu tokusei kaizen ni kansuru kenkyu chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Research was made on improvement of the wettability and boiling heat transfer characteristics of a photocatalyst wall. Measurement experiment of the wettability was made for anatase type titan oxide-coated Al, SUS and Pb plates, rutil type titan oxide-flame coated SUS plate, raw plate, and oxide-plasma coated titan plate. In the ground experiment, the contact angles of distilled water and oil on specimen surfaces were measured. In the microgravity experiment, falling droplet images were recorded by using the facility of Japan Microgravity Center (JAMIC). For obtaining the effect of radioactive emission, UV irradiation, {gamma} ray and neutron beam irradiation by nuclear reactor, and {gamma} ray irradiation by Co-60 were carried out. As the experiment result, the rutil type titan oxide-flame coated SUS plate, nonconductor-coated titan plate, and zircaloy plate showed large improvement of the wettability by {gamma} ray irradiation with Co-60. It was also confirmed that in particular, titan shows the large effect of radioactive emission, and the wettability deteriorates rapidly after {gamma} ray irradiation. (NEDO)

  2. Improvement of the characteristics of a diagonal-flow fan in low flow range with casing-bleed-holes; Keshingu kiko ni yoru sharyu sofuki no teiryu ryoiki tokusei no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Ando, Yoichi; Sasaki, Kazuto; Yamaguchi, Sumio; Yamashita, Shoji; Shimada, Taichiro

    1999-09-01

    Generally, a high specific speed diagonal flow fan with a small pressure rise coefficient has a slight positive gradient part of the pressure rise - flow rate characteristics. In addition, the pressure fall is small, between the flow rate at which the impeller stall in the throttle closer and the stalling flow rate. In the case, Kaneko et al. suggest a way of improvement on performance characteristics by an inlet annular wing which removes a low-momentum fluid from a rotor tip region. However, in case of a fan that has a sharp drop of pressure rise in the stall characteristics, it is not clear that the stall characteristics can be improved by this way. In this study, in order to improve the unstable characteristics of a high pressure rise coefficient diagonal flow fan, Tip clearance flow has been investigated on five rotor-casings with various holes to bleed low-momentum fluid in the range of flow rate from design point to stall point. (author)

  3. Evaluation of mechanical properties of construction joint between new and old concrete under combined tensile and shear stresses; Shinkyu concrete no uchitsugime no incho sendan oryokuka no kyodo tokusei no hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Ujiike, I. [Ehime University, Ehime (Japan). Faculty of Engineering; Yoshida, N. [Shikoku Railway Company, Kagawa (Japan); Morishita, S. [Oriental Construction Co. Ltd., Tokyo (Japan)

    1998-01-15

    The objective of this study is to examine the mechanical properties of construction joints between existing and newly placed concrete under combined tensile and shear stresses. Loading tests are conducted by using push off type specimens. The joint surface of existing concrete is roughened by shot blast and a half of the specimen is reconstructed by new concrete using ultra rapid hardening cement. The insufficient treatment of joint surface of the old concrete causes the lowering of tensile rigidity, while shearing rigidity is almost the same as that of the other specimen. The shearing and tensile rigidities of non jointed concrete and concrete shot blasted properly are not dependent on the combination of shearing and tensile forces. For the jointed concrete shot blasted insufficiently, the shearing rigidity decreases with the increase of tensile force and the tensile digidity also becomes lower by the action of shearing force. Both the tensile strength and shearing strength of jointed concrete become small compared to those of non jointed concrete. The ratio of reduction in tensile strength is larger than that in shearing strength. The strength of jointed concrete under combined tensile and shear stresses can be evaluated by Mohr`s failure envelope expressed by parabola tangent to both tensile strength circle and compressive strength circle. 7 refs., 12 figs., 2 tabs.

  4. Changes of the temperature coefficients of the characteristics which accompany degradation and recovery of a-Si solar cells; A-Si taiyo denchi no hikari (denryu) rekka oyobi kaifuku ni tomonau tokusei ondo keisu no henka

    Energy Technology Data Exchange (ETDEWEB)

    Yanagisawa, T; Koyanagi, T; Nakamura, K; Takahisa, K; Kojima, T [electrotechnical Laboratory, Tsukuba (Japan)

    1996-10-27

    Pursuant to the measuring of temperature dependency of the characteristics such as conversion efficiency, during the process of degradation in a-Si solar cells due to light and electric current and the process of recovery by annealing, this paper describes changes in temperature coefficients, correlation between the characteristic parameters and the degradation, and the results of the examination of their characteristics. The conversion efficiency {mu} degraded approximately by 45% of the initial value each by the irradiation under a light intensity with 3 SUN accelerated and by the infusion of current at 20mA/cm{sup 2}; and then, the efficiency recovered to 70-75% of the degradation by subsequent annealing. In addition, in the temperature dependency at 80{degree}C against at 20{degree}C, Isc slightly increased while Vcc greatly decreased. This slight increase in Isc was mainly due to the decrease in the width of the forbidden band, while the decrease in Vcc was due to the increase in the reverse saturation current. The temperature dependency of {mu}N was negative, becoming small in accordance with the degradation. The temperature dependency of FF/FFO was negative initially both in light and current, but it decreased with the degradation and turned to positive. The temperature coefficients of I-V parameters reversibly changed corresponding to the degradation and recovery of these parameters and stayed in a good correlation. 7 refs., 8 figs., 1 tab.

  5. Estimation of spectral solar radiation based on global insolation and characteristics of spectral solar radiation on a tilt surface; Zenten nissharyo ni motozuku zenten nissha supekutoru no suitei to keishamen bunko tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Baba, H; Kanayama, K; Endo, N; Koromohara, K; Takayama, H [Kitami Institute of Technology, Hokkaido (Japan)

    1996-10-27

    Use of global insolation for estimating the corresponding spectral distribution is proposed. Measurements of global insolation spectrum throughout a year were compiled for clear days and cloudy days, ranked by 100W/m{sup 2}, for the clarification of spectral distribution. Global insolation quantity for a clear day was subject mainly to sun elevation. The global insolation spectral distribution with the sun elevation not lower than 15{degree} was similar to Bird`s model. Under the cloudy sky, energy density was lower in the region of wavelengths longer than the peak wavelength of 0.46{mu}m, and the distribution curve was sharper than that under the clear sky. Values given by Bird`s model were larger than measured values in the wavelength range of 0.6-1.8{mu}m, which was attributed to absorption by vapor. From the standard spectral distribution charts for the clear sky and cloudy sky, and from the dimensionless spectral distributions obtained by dividing them by the peak values, spectral distributions could be estimated of insolation quantities for the clear sky, cloudy sky, etc. As for the characteristics of spectral solar radiation on a tilt surface obtained from Bird`s model, they agreed with actually measured values at an angle of inclination of 60{degree} or smaller. 6 refs., 10 figs., 1 tab.

  6. Characteristics of combined propulsion, levitation and guidance system with asymmetric figure between upper and lower coils in EDS; Joge coil ga hitaishona suishin fujo annai ken`yo yudoshiki jiki fujo no tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Murai, T.; Fujiwara, S. [Railway Technical Research Institute, Tokyo (Japan)

    1996-11-20

    In commercializing the superconducting maglev system it is important to reduce the cost, especially that of ground coils constructed along the whole length of the guideway. For a system to save the cost, we have examined the combined propulsion, levitation and guidance system (PLG system) which can generate levitation, guidance and propulsion forces by the same ground cogs. This system is composed of superconducting coils on board and 8-shaped ground coils on the side wall of the guideway whose unit coils are connected reversely between the upper and lower sides and between the right and left sides to make null flux circuits, and serially between the front and rear sides to make a three phase circuit with the power source. On the contrary, the EDS (Electro-Dynamic Suspension) maglev including the PLG system needs auxiliary wheels at low speed at which the levitation force and the electromagnetic stiffness are insufficient for non-contact running. The take off velocity is desirably made as low as possible for dispensing with the strength design and maintenance of track and wheels. Since the side wall levitation system has a large coupling between guidance and rolling, it is important to improve the stiffness considering this coupling, which restricts the take off velocity. The ground coils in the above- mentioned examination have symmetric figure and same impedance between upper and lower coda. This paper describes the PLG system with asymmetric figure between upper and lower coils which reduce the large coupling between guidance and roiling and increase the guidance stiffness. We present not only the principle but also the characteristics of this system with a numerical example and a test run at Miyazaki test track. 4 refs., 19 figs., 3 tabs.

  7. Study on driving control behavior for lane change maneuver. Analysis of expert driver using neural network system; Shasen henkoji no driver sosa tokusei. Neural network system ni yoru jukuren driver no kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Z; Okayama, T; Katayama, T [Japan Automobile Research Institute Inc., Tsukuba (Japan); Kageyama, I [Nihon University, Tokyo (Japan)

    1997-10-01

    In order to study driver steering control behavior for vehicle, a driver model for single-lane change maneuver is constructed by a neural network system concerned with the man-machine-environment system. And, using sensitivity analysis, it is found that the model represent the driver control behavior, and the relation between the driver control behavior and vehicle responses. The sensitivity analysis is also examined by applying to the 2nd order predictive driver model. The validity of the sensitivity analysis is confirmed. 5 refs., 8 figs.

  8. Report on achievements in fiscal 1975 in Sunshine Project. Studies on physical and chemical properties of rocks in geothermal areas; 1975 nendo chinetsu chitai ni okeru ganseki no butsuri kagakuteki tokusei ni kansuru kenkyu seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1976-03-01

    This paper reports the achievements of (A) studies on change in rock specific resistance due to temperature and water content, and (B) petrological, mineralogical and chemical studies on thermally transformed rocks. In the study (A), it was discovered that use of high-pressure capsules allow to obtain test samples in a condition of containing hot water as a result of studies on temperature change in rock specific resistance due to hot water content. In the measurements of geothermal gradient and heat conductivity of test drilled rock cores, the experiments revealed that there are different patterns of temperature restoration due to geological conditions and finish of wells, and properties of mud water used. The studies on thermal structures and underground structures decided shapes of measurement test samples of test drilled cores. In the measurements of heat conductivity and heat flow rate of test drilled rock cores, considerations were given on the relationship among sectional temperature increasing rate, heat conductivity and heat flow rate. The measurements of residual magnetism and magnetization in rocks described interpretation on the result of test drilled core measurement. In the study (B), aluminous sphere in the Hachimantai Onuma geothermal area is first described. Then, a description is given on the relationship between chemical constituents and electric conductivity of natural water in Mt. Akita Yakeyama and its vicinity. (NEDO)

  9. Vibration characteristics and dynamic increment factor of 2 span continuous PC cable-stayed bridge under moving vehicles; 2 keikan renzoku PC shachokyo no sharyo sokoji no shindo tokusei to doteki zofukuritsu

    Energy Technology Data Exchange (ETDEWEB)

    Fukada, S.; Kajikawa, Y. [Kanazawa Univ. (Japan)] Tsunomoto, M. [Oriental Construction Co. Ltd., Tokyo (Japan)

    1998-10-21

    In this study, experiments on and simulation analyses of the travels of vehicles on a 2 span continuous PC cable-stayed bridge were conducted, and the propriety of the analysis method, vibration characteristics of traveling vehicles, and characteristics of the effective amplitude and dynamic increment factor concerning various traveling states were discussed. The results show that actually measured value of strain to a dynamic load substantially agreed with the value of strain obtained in the case of analysis in which the end fulcrums were movable. The actually measured value of natural frequency was between the value of natural frequency in the case of analysis in which the end fulcrums were movable and the value in the case of analysis in which the end fulcrums were in a pin state. The actually measured value of mode damping constant agreed exactly with the value of mode damping constant calculated on the assumption that the damping constant of the main beam is 1.0%, those of the main tower and bridge pier 5.0%, and that of the cables 0.1%. Therefore, the damping matrix in the dynamic response analysis was determined on the basis of the damping constants of these members. The characteristics of the effective amplitude and dynamic increment factor in various traveling states of the results of the simulation analysis are in comparatively good agreement with those of experiments. 20 refs., 17 figs., 5 tabs.

  10. Experimental investigation on wake galloping appeared in tandem cables of cable-stayed bridges subjected to wind in skewed direction; Normal narabini dimple tsuki heiretsu cable ni senpu ga sayoshita baai no wake galloping tokusei ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Yoneda, M.; Miyachi, S.; Edamoto, K.; Mochizuki, H.; Setouchi, H. [Kawada Industries Inc., Tokyo (Japan)

    1996-03-20

    Concerning the smooth surface and dimpled surface cables, experiments were conducted to investigate relationship between their wake galloping characteristics and aerostatic force characteristics they demonstrate when exposed to wind blowing in a skewed direction. The wind tunnel used for the experiment was a closed type measuring wind tunnel, 2.0m wide, 2.5m high, and 15.0m long. In the wind tunnel, two cables were arranged with the distance between the cable centers three times as large as the cable diameter D, and with relative vertical difference of 0.25-0.50D, and spring-supported experiments for evaluating wake galloping characteristics and aerostatic force coefficient determining experiments were carried out. It was deemed as the result that turbulence exerts influence on the wake galloping characteristics of the dimpled surface cable more than on those of the smooth surface cable, that on a real bridge the effect of turbulence may be expected in case of exposure to natural wind of turbulence with intensity higher than 5-7%, and that therefore application of some damping by dampers will adequately damp wake galloping even in case of the 0.37D vertical difference. 12 refs., 23 figs.

  11. Some considerations on special spacers with damping device for suppressing wake galloping in tandem cables of cable-stayed bridges; Heiretsu cable yo gensui kino tsuki supesa no gensui fuka tokusei ni kansuru 2,3 no kosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Yoneda, M. [Kinki Univ., Higashi-Osaka, Osaka (Japan). Faculty of Science and Technology] Setouchi, H. [Kawada Industries Inc., Osaka (Japan)

    1998-03-20

    Cable vibration called wake galloping appears on cable-stayed bridges with parallel arranged cables and its suppression is an important problem. Various methods have been proposed for spacers with damping device for suppressing wake galloping in tandem cables of cable-stayed bridges. But, comparison of damping performances of various methods have not been discussed sufficiently. This paper deals with a type in which dampers are equipped on the midway of the tandem cables through the spacer jig and a type in which dampers are equipped on each surface of the tandem cables to generate shear deformation between them and circular spacer jig moiety and complex eigenvalue analyses are carried out on the two types with changing center spacing and diameters of the cables. The results clarify the relation between the structural damping characteristics and the cable spacing and the effect of torsional rigidity of the cables and also clarify of damping characteristics of the two types. 16 refs., 14 figs., 4 tabs.

  12. Report on the results of the R and D of a 200 t/d entrained bed coal gasification pilot plant. Summary - Part 2. Volume 3: Results of the study operation and the evaluation; 1986- 200t/nichi funryusho sekitan gaska hatsuden pilot plant no kenkyu seika hokokusho (Matome). Sono 2. Dai 3 hen kenkyu unten seika to sono hyoka

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-01-01

    A project was finished which had been carried out for 11 years since 1986 for technology of the entrained bed coal gasification power generation technology using a 200 t/d coal gasification combined cycle power generation pilot plant, and it was comprehensively summed up. In Volume 3: Results of the study operation and the evaluation, the following were summarized on gasifier: gasification performance of 200 t/d furnace, operation ability of the bituminous coal supply system, stability of char recovery, deposition of slag and char in furnace, discharge characteristics of molten slag, operation characteristics, etc. The following on gas refining facilities: dry desulfurizer, dust remover, new gas refining equipment (fixed bed dust removal/desulfurization system, packed bed desulfuriztion/dust removal system), etc. The following on gas turbine facilities: 12.5 MW gas turbine, large gas turbine, large gas turbine combustor, etc. Additionally, the paper summarized the control system and total function, operation characteristics of the whole pilot plant, relations of environmental preservation, study of the effective slag utilization, collection/study of unfavorable conditions/troubles and matters for the reflection, etc. (NEDO)

  13. FUSARIUM VERTICILLIOIDES IN MAIZE: HOW ABIOTIC AND BIOTIC FACTORS CAN INFLUENCE GROWTH AND FUMONISINS PRODUCTION IN FIELD AND DURING STORAGE

    OpenAIRE

    FORMENTI, SILVIA

    2010-01-01

    In questa tesi di dottorato sono stati indagati i punti critici legati ai fattori biotici e abiotici che possono influenzare la crescita del fungo Fusarium verticillioides, produttore di fumonisine in mais. le fumonisine sono metaboliti secondari prodotte da funghi appartenenti al genere Fusarium e sono state classificate come possibili cancerogene per l’uomo e per gli animali. Gli argomenti trattati nei vari capitoli sono stati: parametri ecologici che condizionano la crescita e l’accumulo d...

  14. Fiscal 1995 achievement report. Development of entrained bed coal gasification power plant (Part 1 - Studies of key elements and techniques); 1995 nendo seika hokokusho. Funryusho sekitan gaska hatsuden plant kaihatsu - Sono 1. Youso kenkyu hen, gijutsu chosa hen

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Element techniques were studied and surveyed for establishing the technology of integrated coal gasification combined cycle. In fiscal 1995, E coal (coal of high ash fluid point) gasification was tested in the 2 tons/day furnace for the effect of its properties on furnace operation and for its properties relating to gasification and slagging and for changes in such properties due to flux admixed with the E coal. It was then found that the ash fluid point was so high as 1500 degrees C and that flux admixing, recovered oxygen reinjection, etc., would be necessary for the assurance of stable slag discharge. In a study using combined cycle system simulation, a comparison was made between results from tests conducted on a real system and results from the simulation, based on the detailed model completed by the preceding fiscal year. The model was reviewed and improved, and simulations were conducted in the respective operating states and operating modes. In the survey of element techniques, information was gathered at a Japan-U.S. joint technical conference held in Japan in October this year. Studies were also made about technical guidelines, or the like, involving coal gasification power generation. (NEDO)

  15. Kinetic analysis of photochemical sterilization of thermoduric bacterial spores in slurry of semiconductor catalyst particles with aeration. Handotai shokubai ryushi no tsuki kendakukei ni okeru tainetsusei saikin hoshi no hikari sakkin to sono sokudoronteki kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Tone, S; Taya, M; Kato, S; Horie, Y; Ashikaga, Y [Osaka Univ., Osaka (Japan). Faculty of Engineering and Science; Joo, Hyunkyu [Konkuk Univ., Seoul (Korea, Republic of)

    1993-11-10

    To study the utilization of the photochemical sterilization of thermoduric bacterial spores B. stearothermophilus with photocatalysis of TiO2 particles, light irradiation experiments are conducted under various operational conditions. TiO2 particles and dissolved oxygen resulting from aeration must coexist to accelerate the rate of spore sterilization under light irradiation of a high pressure mercury lamp. The sterilization rate increases with larger average light intensity in the reactor, and it is estimated that the dissolved oxygen contributes to the formation of oxidative radicals which beco