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Sample records for normal por ecocardiograma

  1. Síndrome do coração partido (Síndrome de Takotsubo induzida por ecocardiograma de estresse com dobutamina Síndrome del corazón roto (síndrome de Tako-Tsubo inducido por ecocardiograma de esfuerzo con dobutamina Dobutamine stress echocardiography-induced broken heart syndrome (Takotsubo Syndrome

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    Francisco Juarez Cruz de Vasconcelos Filho

    2009-07-01

    Full Text Available Relatamos um caso de síndrome de Takotsubo induzida por ecocardiograma de estresse com dobutamina em uma paciente de 76 anos, hipertensa com queixas clínicas de dor precordial, em consulta cardiológica eletiva. Para exclusão de dor torácica de etiologia coronariana foi solicitado ecocardiograma de estresse com dobutamina. O exame foi realizado e, no pico do esforço máximo, o ecocardiograma mostrou acinesia apical com o eletrocardiograma mostrando supradesnivelamento do segmento ST em D1, AVL e V2. A paciente foi internada e submetida a coronariografia, que mostrou coronárias normais e VE com balonamento apical. A paciente evoluiu estável com reversão do quadro 21 dias após o quadro inicial.Relatamos un caso de síndrome de Tako-Tsubo inducido por ecocardiograma de esfuerzo con dobutamina en una paciente de 76 años, hipertensa con quejas clínicas de dolor precordial, en consulta cardiológica electiva. Para exclusión de dolor torácico de etiología coronaria se solicitó ecocardiograma de esfuerzo con dobutamina. El examen fue realizado, y en el pico de esfuerzo máximo, el ecocardiograma mostró acinesia apical con el electrocardiograma mostrando supradesnivel del segmento ST en D1, AVL y V2. La paciente fue internada y sometida a coronariografía, que mostró coronarias normales y VI con abombamiento apical. La paciente evolucionó estable con reversión del cuadro 21 días después del cuadro inicial.We report a case of dobutamine stress echocardiography-induced Takotsubo syndrome in a 76-year-old hypertensive patient with clinical complaints of chest pain in an elective visit to the cardiologist. Dobutamine-stress-echocardiography was requested to rule out chest pain of coronary origin. During the test, at peak exercise, echocardiogram showed apical akinesia and electrocardiogram showed ST-segment elevation in D1, AVL, and V2. The patient was hospitalized and underwent coronary angiography, which showed normal coronary arteries

  2. Avaliação do ventrículo direito pelo ecocardiograma com doppler tecidual na embolia pulmonar aguda

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    Ana Clara Tude Rodrigues

    2013-06-01

    Full Text Available FUNDAMENTO: A avaliação da função Ventricular Direita (VD pelo ecocardiograma em pacientes com Tromboembolismo Pulmonar (TEP é complexa, frequentemente qualitativa; o Doppler tecidual tem sido utilizado para avaliação semiquantitativa dessa câmara, com algumas limitações. OBJETIVO: Avaliar a função do VD no TEP pelo ecocardiograma com Doppler tecidual, complementando com o peptídeo atrial natriurético (BNP. MÉTODOS: Foram estudados pacientes com TEP pelo ecocardiograma com Doppler tecidual e BNP até 24 horas do diagnóstico, obtendo-se as velocidades miocárdicas (s', strain, strain rate e índice de performance miocárdica do VD; disfunção do VD foi iagnosticada por hipocinesia da câmara, movimento anormal septal e relação VD/VE >1. De acordo com o BNP os pacientes foram divididos em Grupo I, BNP 50 pg/mL. RESULTADOS: De 118 pacientes, 100 (60 homens, idade = 55 ± 17 anos foram analisados; observou-se disfunção do VD em 28%, mais frequentemente no grupo II (19 vs. 9 pacientes, p < 0,001. O grupo II era mais idoso (64 ± 19 vs. 50 ± 15 anos, apresentava menor velocidade de s' (10,5 ± 3,5 vs. 13,2 ± 3,1 cm/s e maior pressão pulmonar (48 ± 11 vs. 35 ± 11 mmHg, p < 0,001 para todos. O ponto de corte de s' para disfunção do VD foi de 10,8 cm/s (especificidade = 85%, sensibilidade = 54%, com moderada correlação entre o BNP e a onda s'(r = -0,39. CONCLUSÃO: No TEP, a disfunção do VD pelo ecocardiograma se acompanha de elevação do BNP; apesar confirmar adequadamente a presença de disfunção do VD, o Doppler tecidual apresenta sensibilidade limitada para este diagnóstico.

  3. Papel del ecocardiograma en la reparación mitral

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    Vanessa Moñivas

    2010-10-01

    Full Text Available La insuficiencia mitral (IM es muy prevalente en Europa a pesar de la reducción de la fiebre reumática. El desarrollo de las técnicas de reparación mitral introducido por Alain Carpentier ha cambiado el pronóstico y el manejo de los pacientes con IM. Las técnicas de imagen son fundamentales para la evaluación del tipo de lesión anatómica, etiología, mecanismo, cuantificación, así como para valorar la posibilidad de éxito de la reparación. La ecocardiografía transesófagica (ETE bidimensional se emplea de forma rutinaria para planear la reparación mitral. Sin embargo, la ETE tiene una serie de dificultades en relación a las relaciones anatómicas y las anomalías morfológicas de la válvula mitral (VM. La recientemente introducida ecocardiografía tridimensional (3D nos ha permitido entender la anatomía funcional de la VM, la fisiopatología de las lesiones mitrales y, en especial, de la insuficiencia mitral funcional (IMF. En la actualidad, la ecotransesofágico 3D (ETE-3D supone una herramienta imprescindible, tanto para el diagnóstico de lesiones mitrales como para la monitorización en el quirófano de cirugía cardíaca y de los procedimientos percutáneos en hemodinámica. Permite evaluar online todas las estructuras cardíacas y ofrece nuevos planos como la «vista de cirujano» para valorar la morfología de la VM en una sola adquisición. El objetivo de este artículo es revisar la aportación de la ETE, así como la ETE-3D en el conocimiento de la anatomía funcional de la VM, sus aplicaciones clínicas y sus implicaciones terapéuticas.

  4. Volumen de la aurícula izquierda indexada por superficie corporal en sujetos normales divididos por sexo y edad

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    Héctor A. Deschle

    2010-01-01

    Full Text Available RESUMENIntroducciónEl tamaño de la aurícula izquierda (AI se ha relacionado con la ocurrencia de eventoscardiovasculares en pacientes mayores sin cardiopatía previa.Los valores considerados normales en adultos se suelen tomar de publicaciones extranjerasque presentan valores disímiles y no incluyen la división por edades, por lo que no quedaclaro el impacto que el envejecimiento podría tener sobre el tamaño auricular izquierdo, locual los hace difícilmente aplicables a la población general.ObjetivosEvaluar las modificaciones en el volumen indexado de la aurícula izquierda en sujetos saludablesde nuestro medio divididos por sexo y edad.Material y métodosEntre 2007 y 2008 ingresaron 725 pacientes asintomáticos sin antecedentes de cardiopatía,diabetes, ni enfermedades de relevancia clínica. Sexo masculino: 325. Se dividieron en gruposetarios: a 65 años. El volumen de laaurícula izquierda (AI se calculó de acuerdo con la fórmula: 8/3 π [(A1(A2/(L] (A1 = áreaen 4 cámaras, A2 = área en 2 cámaras, L = longitud más pequeña entre ambas vistas. Lasuperficie corporal se calculó con la fórmula de Mosteller.ResultadosEl volumen indexado de la AI fue significativamente mayor en varones > 64 años (32,89 ±5,93 cm³/m² con respecto a los tres primeros grupos etarios (p < 0,01. No hubo diferenciassignificativas entre los grupos del sexo femenino.ConclusiónEl volumen de la AI es significativamente mayor en varones de más de 64 años.REV ARGENT CARDIOL 2010;78:39-42.

  5. Betabloqueador tópico pode determinar resultados inconclusivos no ecocardiograma sob estresse com dobutamina em pacientes com glaucoma Topical betablocker use can result in inconclusive dobutamine stress echocardiography in patients with glaucoma

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    Adriana Cordovil

    2007-07-01

    Full Text Available O ecocardiograma sob estresse com dobutamina é um método bem estabelecido para avaliar doença arterial coronária, cuja sensibilidade tem sido potencializada pela adição de atropina no final do protocolo. Indivíduos com glaucoma, doença com alta prevalência em pacientes cardiopatas com mais de 40 anos, não podem se beneficiar do uso de atropina por ser contra-indicada neste grupo. Além disso, estes indivíduos são tratados freqüentemente com betabloqueadores tópicos (colírios, que podem exercer efeitos sistêmicos diminuindo a freqüência cardíaca, pressão arterial e capacidade pulmonar. O objetivo do nosso trabalho foi verificar se a ocorrência de um possível efeito sistêmico causado por estes colírios, causando baixa resposta cronotrópica, poderia determinar resultados inconclusivos no ecocardiograma sob estresse pela dobutamina nestes pacientes com glaucoma.Dobutamine stress echocardiography is a well-established method to assess coronary artery disease, of which sensitivity has been enhanced by adding atropine at the end of the protocol. Individuals with glaucoma, a disease with a high prevalence in patients with cardiac diseases older than 40 years, cannot benefit from the use of atropine as it is contraindicated for this group of patients. Additionally, these individuals are often treated with topical betablockers (eye drops, which can have systemic effects by decreasing cardiac frequency, blood pressure and pulmonary capacity. The aim of our study was to verify whether a possible systemic effect caused by the use of these eye drops, yielding a low chronotropic response, could result in inconclusive dobutamine stress echocardiography in patients with glaucoma.

  6. Endocarditis trombótica no bacteriana bivalvular asociada a cáncer y ecocardiograma transesofágico Bivalvular non bacterial thrombotic endocarditis associated with cancer and transesophageal echocardiography

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    Marcelo Zylberman

    2006-06-01

    Full Text Available La endocarditis trombótica no bacteriana es la causa más frecuente de accidente cerebrovascular isquémico en pacientes con cáncer. En estos pacientes se hallaron vegetaciones valvulares hasta en el 9% de las autopsias. Sin embargo, la afección bivalvular es poco frecuente, observándose en el 9% de las endocarditis trombóticas. Se presenta una paciente con cáncer de ovario que presentó afasia e imágenes compatibles con isquemia cerebral. El ecocardiograma transtorácico fue normal. El ecocardiograma transesofágico evidenció vegetaciones en las válvulas aórtica y mitral. Se enfatiza la importancia de sospechar endocarditis trombótica no bacteriana en enfermos con cáncer y embolismo sistémico y en la escasa frecuencia de afección bivalvular.Non bacterial thrombotic endocarditis is the most frequent cause of ischemic stroke in cancer patients. Up to 9% of autopsies of cancer patients show non infectious valvular masses. However, bivalvular involvement is not frequently occurring in 9% of non bacterial thrombotic endocarditis. We report a patient with ovarian cancer who presented aphasia. The MRI was compatible with cerebral ischemia. The transthoracic echocardiogram was normal and a transesophageal echocardiogram showed vegetations in aortic and mitral valves. We emphasize the importance of suspecting non bacterial thrombotic endocarditis in patients with cancer and systemic embolism and the low frequency of bivalvular involvement.

  7. Papel do ecocardiograma na avaliação ventricular do coração transplantado versus rejeição cardíaca

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    Gabriel Antonio Stanisci Miguel

    2012-11-01

    Full Text Available FUNDAMENTO: O Transplante Cardíaco (TC é uma alternativa para os indivíduos com doença cardíaca terminal. Na evolução pós-transplante, a ocorrência de episódios de Rejeição Cardíaca (RC é evento frequente que aumenta a morbimortalidade, sendo necessário o emprego de exame não invasivo com boa acurácia para seu diagnóstico, pois a Biópsia Endomiocárdica (BEM não é um procedimento isento de complicações. OBJETIVO: Comparar parâmetros obtidos com o princípio Doppler, entre os pacientes transplantados com RC (TX1 e os pacientes transplantados sem rejeição (TX0; utilizando como referência o Grupo Controle (GC e observando o comportamento da função sistodiastólica ventricular esquerda expressa por meio do Índice de Performance Miocárdica (IPM. MÉTODOS: Foram realizados ecocardiogramas transtorácicos no período de janeiro de 2006 a janeiro de 2008, para a avaliação prospectiva de 47 pacientes, subdivididos em GC (36,2%, TX0 (38,3% e TX1 (25,5%, comparando-se o IPM entre eles. Para a análise dos dados foram realizados os testes exato de Fisher e o não paramétrico de Kruskal-Wallis, ambos com nível de significância de 5%. RESULTADOS: Os grupos não diferiram em relação a idade, peso, altura e superfície corpórea. Quando comparado ao GC, TX0 e TX1 apresentaram alteração da função sistodiastólica ventricular esquerda, expressa como aumento do IPM, que foi mais intenso no TX1 [0,38 (0,29 - 0,44 X 0,47 (0,43 - 0,56 X 0,58 (0,52 - 0,74 p < 0,001]. CONCLUSÃO: O ecocardiograma mostrou-se como exame de boa acurácia na detecção das alterações da função sistodiastólica do coração transplantado; entretanto, não foi confiável como método substituto da BEM para o diagnóstico seguro de RC.

  8. Insuficiência valvar aórtica por valva quadricúspide

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    SALUM Marco Antônio

    2002-01-01

    Full Text Available Valva aórtica quadricúspide (VAQ é uma anomalia rara com incidência entre 0,003% e 0,043%. Pode ser achado ocasional em pacientes assintomáticos, mas, freqüentemente, está associada com regurgitação aórtica. O ecocardiograma é método ideal de determinação e acompanhamento dessa anomalia e suas repercussões. É relatado caso de paciente do sexo masculino, 56 anos, hipertenso, que apresentou dispnéia súbita, tosse seca, sopro diastólico grau III/VI focos aórtico e aórtico acessório, crepitações pulmonares nas bases, sugerindo insuficiência cardíaca. Ecocardiograma transtorácico mostrou VAQ com regurgitação moderada. Houve melhora com tratamento clínico. Após um ano, novo ecocardiograma revelou regurgitação aórtica importante, hipertensão pulmonar, hipertrofia moderada e dilatação leve de ventrículo esquerdo. Diante da deterioração da fração de ejeção e demais achados ecocardiográficos, indicou-se a troca valvar. A valva nativa apresentava três cúspides de mesmo tamanho e uma pouco menor. O paciente evoluiu com remissão dos sintomas. Insuficiência aórtica por valva quadricúspide geralmente é detectada em adultos; nas crianças a função cardíaca é normal. Defeitos cardíacos associados são raros e incluem defeitos óstio coronário. A anatomia valvar varia com o tamanho das cúspides, sendo que em 60% dos casos a VAQ possui três cúspides de igual tamanho e uma cúspide menor. A definição ecocardiográfica característica de VAQ é a forma de 'X' durante a diástole e abertura livre das cúspides com configuração retangular durante a sístole. Os achados clínicos e anatômicos da valva do paciente descrito condizem com a literatura.

  9. Impacto do ecocardiograma transesofágico intraoperatório na mortalidade em cirurgia de revascularização do miocárdio com circulação extracorpórea

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    Marcello Fonseca Salgado Filho

    Full Text Available OBJETIVO: avaliar as taxas de mortalidade e morbidade de doentes submetidos à revascularização do miocárdio (RVM com circulação extracorpórea (CEC que utilizaram rotineiramente o ecocardiograma transesofágico intraoperatório (ETEio. MÉTODOS: estudo retrospectivo, observacional com avaliação de prontuários de 360 doentes no período entre abril de 2010 a abril de 2012. Foram analisados: idade, peso, altura sexo, EUROscore, diabete melito, fração de ejeção e artérias acometidas. Os desfechos foram compilados no intra e no pós-operatório (infarto do miocárdio, acidente vascular cerebral, disfunção renal, hemodiálise, fibrilação atrial, tempo de internação no centro de tratamento intensivo. RESULTADOS: foram incluídos 53 doentes, com 27 recebendo a monitoração. Foram excluídos 307 porque não foram operados pela mesma equipe cirúrgica. Os dois grupos foram homogêneos quanto a idade, peso e sexo, porém, a fração ejeção foi menor no grupo que recebeu o ecotransesofágico (G ETEio: 56,3%; G Não ETEio: 65,9% ± 11; p=0,01. Nos doentes em que não foi utilizado o ETEio, a mortalidade foi maior (G ETEio: 0% e G Não ETEio: 7,6%; p=0,01. Não houve diferença significativa entre os grupos quanto à incidência de acidente vascular encefálico, infarto agudo do miocárdio, fibrilação atrial aguda e lesão renal. CONCLUSÃO: a utilização do ecocardiograma transesofágico intraoperatório em pacientes submetidos à revascularização do miocárdio, com circulação extracorpórea, diminuiu a mortalidade perioperatória; orientou quanto a utilização dos fármacos inotrópicos e vasodilatadores e contribuiu para uma melhor evolução dos doentes.

  10. Pontas evocadas por estímulos somatossensitivos e atividade epileptiforme no eletrencefalograma em crianças "normais" Somatosensory evoked spikes and epileptiform activity in "normal" children

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    Lineu C. Fonseca

    2003-09-01

    Full Text Available Estudamos a ocorrência de potenciais de alta voltagem evocados por estímulos somatossensitivos - pontas evocadas (PE - e de atividade epileptiforme espontânea (AE no EEG de 173 crianças normais de 7 a 11 anos de idade. Durante o EEG, dez percussões foram realizadas nas mãos e pés. Foi avaliada a ocorrência de PE acompanhando cada um dos estímulos e a presença de AE. AE foi observada em quatro crianças (2,3%: pontas centroparietais em duas, complexos de ponta-onda lenta generalizados em uma e pontas parietais e temporais médias em uma. Uma menina de 10 anos de idade (0,58% teve ao EEG pontas parietais medianas evocadas pela percussão do pé esquerdo. Este EEG era normal quanto a outros aspectos. Nossos achados de AE em crianças normais são similares aos encontrados em estudos de outros países. Constatamos que espículas somatossensitivas podem ser observadas em crianças normais o que sugere uma natureza funcional ligada à idade.Little is known about somatosensory evoked spikes (SES in the EEG of normal children. We studied the occurrence of SES and spontaneous epileptiform activity (SEA in 173 normal children ageg 7 to 11 years. During the EEG ten taps were applied to both hands and feet. The occurrence of high voltage potentials evoked by each stimulation of one or both heels or hands (SES and the occurrence of SEA were evaluated. SEA was observed in four children (2.3 %: central/parietal spikes in two cases, generalized spike-and-wave in one, and parietal/midtemporal spikes in one case. A ten years old girl (0,58% had SES on median parietal region by tapping the left foot. This EEG was otherwise normal. Our findings of SEA are similar to those obtained in other normal populations. SES can be observed in normal children. These SES suggest that we are dealing with an age-related functional phenomenon.

  11. Efeitos da estimulação ventricular convencional em pacientes com função ventricular normal Efectos de la estimulación ventricular convencional en pacientes con función ventricular normal Conventional ventricular stimulation effects on patients with normal ventricular function

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    Luiz Antonio Batista de Sá

    2009-08-01

    Full Text Available FUNDAMENTO: A estimulação de ventrículo direito pode ser deletéria em pacientes com disfunção ventricular, entretanto há poucas evidências sobre o impacto dessa estimulação em pacientes com função normal. OBJETIVO: Avaliar a evolução clínica e laboratorial de pacientes com função ventricular normal submetidos a implante de marcapasso cardíaco artificial. MÉTODOS: Foram estudados de forma prospectiva 16 pacientes com os seguintes critérios de inclusão: função ventricular normal definida pelo ecocardiograma e presença de estimulação ventricular superior 90% (avaliação por telemetria do gerador. Parâmetros analisados: classe funcional (CF, teste de caminhada, dosagem de BNP, ecocardiograma (convencional e parâmetros de dessincronia intraventricular e teste de qualidade de vida (SF36. Essas medidas fora feitas com 10 dias(d (t1, 120d(t2 e 240 d(t3. Os dados foram comparados ao longo do tempo segundo método ANOVA. Comparações múltiplas de médias foram efetuadas utilizando-se o método de Tukey. RESULTADOS: Dos dados avaliados os seguintes não apresentaram variação estatística significante (p>0,05: classe funcional, dosagem de BNP, parâmetros ecocardiográficos convencionais, dessincronia intraventricular (Doppler tecidual. Apresentaram piora (pFUNDAMENTO: La estimulación del ventrículo derecho puede ser dañosa a pacientes con disfunción ventricular. Sin embargo, hay pocas evidencias sobre el impacto de esa estimulación en pacientes con función normal. OBJETIVO: Evaluar la evolución clínica y laboratorial de pacientes con función ventricular normal sometidos a implante de marcapaso cardíaco artificial. MÉTODOS: Se estudiaron de forma prospectiva a 16 pacientes con los siguientes criterios de inclusión: función ventricular normal definida por el ecocardiograma y presencia de estimulación ventricular superior a 90% (evaluación por telemetría del generador. Parámetros analizados: clase funcional

  12. Estimulação ambiental e uso do andador infantil por lactentes com desenvolvimento normal Environmental stimulation and use of a children's baby walkers by infants with normal development

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    Karolina Alves de Albuquerque

    2011-06-01

    Full Text Available OBJETIVOS: avaliar a quantidade e qualidade de estímulos ambientais disponíveis para lactentes com desenvolvimento normal que fizeram uso do andador infantil anteriormente à aquisição da marcha independente. MÉTODOS: estudo transversal, com 24 lactentes distribuídos em dois grupos, sendo 12 do grupo exposto ao andador infantil (AI e 12 do grupo não-exposto (C, mantendo-se equivalência entre grupos em idade, sexo e nível sócio econômico da família. O teste Observation for Measurement of the Environment (HOME documentou os estímulos oferecidos pelo ambiente. Teste-t de Student para amostras independentes comparou os escores médios do teste HOME de ambos os grupos, considerando o nível de significância α=0,05. RESULTADOS: diferenças no teste HOME foram observadas, tendo o grupo AI obtido escores superiores ao grupo C (p=0,014, com efeito de magnitude fraca (d=0,24. CONCLUSÕES: o uso do voador infantil no período pré-aquisição da marcha por lactentes com desenvolvimento normal, pode estar associado a ambientes domiciliares mais estimuladores.OBJECTIVES: to evaluate the quantity and quality of environmental stimuli available to infants with normal development who use a baby walkers prior to learning to walk by themselves. METHODS: a cross-sectional study was carried out with 24 infants distributed into two groups of twelve: one group of children who had used a baby walkers (BW and 12 who had not (C, with the children in both groups being of equivalent ages, sex, and socio-economic background. The Home Observation for Measurement of the Environment (HOME test provided a documentary Record of the stimuli provided by the environment. Student's t-test for independent samples was used to compare the mean scores on the HOME test of both groups, considering the level of significance to be α=0.05. RESULTS: differences in the HOME scores, with the BW group obtaining higher scores than the control group (p=0.014, with a low magnitude

  13. Avaliação funcional dos enxertos coronarianos através do ecocardiograma sob estresse farmacológico com dobutamina Functional assessment of coronary grafts on dobutamine pharmacological stress echocardiogram

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    Felipe José Monassa Pittella

    2006-10-01

    Full Text Available OBJETIVO: Verificar a sensibilidade, a especificidade e a acúracia diagnósticas do ecocardiograma de estresse com dobutamina (EED ao avaliar o estado funcional dos enxertos coronarianos: suficientes (SUF ou insuficientes (INS. MÉTODOS: Estudo observacional, prospectivo, que incluiu 25 pacientes submetidos a cirurgia de revascularização miocárdica (CRVM. Foram realizados o EED e a coronariografia, antes e três meses após a CRVM. O ventrículo esquerdo foi dividido em três territórios por paciente, de acordo com as três principais artérias do coração: descendente anterior (DA, circunflexa (CX e coronária direita (CD. Dos 75 territórios possíveis, 54 foram revascularizados: 25 específicos da artéria DA e 29 das artérias CX/CD. INS significa oclusão ou obstrução luminal maior ou igual a 50%. RESULTADOS: Dos 54 territórios revascularizados, em quatorze (26% os enxertos estavam INS. O EED detectou isquemia em dezesseis (28% territórios; em dez desses os enxertos estavam INS.O EED detectou isquemia em seis (15% dos quarenta territórios cujos enxertos estavam SUF. Portanto, o EED teve sensibilidade de 71,4%, especificidade de 85%, e acurácia diagnóstica de 81,4%. CONCLUSÃO: O EED é um método diagnóstico com alta especificidade e acurácia diagnóstica e boa sensibilidade, na avaliação funcional dos enxertos coronarianos.OBJECTIVE: To verify the sensitivity, specificity and diagnostic accuracy of dobutamine stress echocardiogram (DSE when assessing the functional status of coronary grafts: sufficient (SUF or insufficient (INS. METHODS: We carried out a prospective, observational study which included 25 patients submitted to coronary artery bypass grafting (CABG. The DSE and the coronary angiography were performed before the CABG and three months after the CABG. The left ventricle was divided into three territories per patient according to the three major coronary arterie: the anterior descending (AD, the circumflex (CX

  14. Sterilization of Normal Human Plasma and Some of its Fractions by Means of Gamma Rays; Esterilizacion del plasma normal humano y algunas de sus fracciones por medio de radiaciones gamma

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    López Martínez de Alva, L.; Crespo, Y M. [Cortina Comision Nacional de Energia Nuclear (Mexico)

    1967-09-15

    Owing to the frequency with which normal human plasma transmits hepatitis, various methods of sterilization have been tried. The method most used, but which has been shown to be ineffective, is sterilization of the liquid plasma with ultraviolet rays. The other method is the use of ß-propiolactone, but this has also been discontinued because of the changes it produces in the structure of plasma proteins. The object of the present study, which should be regarded as a preliminary report, is to present the results obtained by sterilizing, by means of gamma rays ({sup 60}Co, 1.3316 MeV) at doses of 2, 2. 5 and 3 Mrad, a substance which, like plasma, contains highly labile proteins easily able to undergo structural changes under irradiation. Pure fibrinogen, pure gamma globulin, and albumin of human origin were subjected to the same doses; the results were very satisfactory, in that no appreciable change could be demonstrated as regards the structure, solubility or chemical characteristics of the substances concerned. It was shown by means of simple coagulation tests that some of the proteins involved in this mechanism, such as prothrombin, die Power-Stuart factor and the Hageman factor, were practically unchanged. All the plasma samples and the various proteins were previously lyophilized to give a maximum moisture content of 0.034%, in order to avoid ionizing the water content into oxygenated water, which would modify and oxidize the proteins. It was shown that lyophilized plasmas initially contaminated with different strains and viruses remained sterile with doses as low as 2 Mrad. Finally, it was shown that this method is simple and practical, since sterilization can be checked in the final packaging. (author) [Spanish] Debido a la frecuencia con que el plasma normal humano transmitia la hepatitis, se han intentado diferentes métodos de esterilizacion. El método más usado pero que ha demostrado ser ineficaz, es la esterilización del plasma liquido con

  15. Infección por VPH en mujeres del municipio de Pasto (Colombia) con resultados de citología normal

    OpenAIRE

    Sánchez-Ortega, Claudia; Suárez, Narváez Karen; Yépez-Chamorro, Maria; Guerrero-Flórez, Milena

    2013-01-01

    Introducción. El cáncer de cuello uterino (CCU) asociado a la infección por VPH se considera un importante problema de salud pública a nivel mundial. En Colombia, es la segunda causa de muerte por cáncer en mujeres. En el municipio de Pasto (N) ubicado al suroccidente de Colombia, la tasa de incidencia es de 27,3/100.000 habitantes. Profundizar en la historia natural de la infección por VPH permitiría mejorar las estrategias de control y diagnóstico temprano para evitar la progresión de este ...

  16. A frequência do HPV na mucosa oral normal de indivíduos sadios por meio da PCR The frequency of human papillomavirus findings in normal oral mucosa of healthy people by PCR

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    David Esquenazi

    2010-02-01

    Full Text Available Os papilomavírus humanos (HPV são DNA vírus pertencentes à família papilomaviridae com grupos de baixo e alto risco que infectam a pele e a mucosa podendo induzir a formação de tumores epiteliais benignos e malignos. Na mucosa oral, estes vírus têm sido associados a papilomas orais, hiperplasias epiteliais focais, leucoplasias e neoplasias orais. OBJETIVO: Estudar a frequência do HPV em mucosa oral de indivíduos normais. MATERIAL E MÉTODO: Trabalho prospectivo em coorte transversal. Participaram desse estudo 100 indivíduos voluntários, faixa etária de 20 a 31 anos, estudantes universitários, sem história, queixas ou lesões visíveis ao exame físico de cavidade oral e orofaringe. Foram submetidos a questionário com perguntas referentes à epidemiologia da infecção pelo HPV. Foi colhido material de mucosa oral por raspado com escova e analisado pelo PCR. RESULTADOS: Os resultados mostraram ausência de HPV em todas as amostras. CONCLUSÃO: Parece ter havido participação do alto nível socioeconômico com alimentação rica em carotenoides e vitamina C, baixo consumo tabágico e etílico e comportamento heterossexual predominantemente monogâmico com uso regular de preservativos.The human papillomavirus (HPV is a DNA virus, which belongs to papillomaviridae family, being of low and high risk, which infect the skin and mucous membranes and can induce benign and malign tumor formation. In the oral mucosa they have been associated with oral papilloma, focal epithelial hyperplasia, leucoplakia and oral neoplasia. AIM: to study the frequency of HPV finding in oral mucosa of normal people. MATERIALS AND METHODS: Prospective study, cross-sectional cohort. One hundred volunteers, young adults, healthy, aged between 20 and 31 years, university students with no history, no complains, without oral or oropharyngeal lesions. They were submitted to a questionnaire with questions regarding HPV infection epidemiology. The samples were

  17. Visual field (Octopus 1-2-3 in normal subjects divided into homogeneous age-groups Perimetria computadorizada no Octopus 1-2-3: estudo de uma população normal por faixas etárias estratificadas

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    Nassim Calixto

    2006-10-01

    Full Text Available PURPOSE: To determine the values in decibels of retinal sensitivity within the central 26 degrees of the visual field of normal subjects divided into homogenous age groups using the Octopus 1-2-3; to compare the values of retinal sensitivity we have found with those considered normal in the statistical package obtained by a multicenter study performed in 1994 with Octopus 201. METHODS: 181 subjects divided into 6 homogeneous age groups (10 to 19 yr; 20 to 29 yr; 30 to 39 yr; 40 to 49 yr; 50 to 59 yr and 60 year-old or older were evaluated. Data on visual sensitivity and age, average sensitivity of central and paracentral regions and eccentricity were calculated. RESULTS: The average visual sensitivity of all groups was 26.77 ± 1.74 dB. Correlation between visual sensitivity and age evaluated by linear regression was 28.4 - 0.040 x (age for the whole sample and 28.7 - 0.050 x (age for subjects aged 20 or more. Sensitivity reduction by eccentricity was -0.30 dB/degree for the whole sample and for subjects aged 20 or more. CONCLUSIONS: Correlation between retinal sensitivity values and age based on the autoperimeter Octopus 201 (average sensitivity of 31.2 - 0.064 x age is different from that found in this study: average sensitivity of 28.4 - 0.040 x (age for the whole sample; 28.7 - 0.050 x (age for subjects aged 20 or more. Values obtained with the Octopus 1-2-3 autoperimeter cannot be compared with those by other Octopus models (101, 201 and 500 due to their distinct features.OBJETIVO: Determinar, utilizando o autoperímetro Octopus 1-2-3, os valores da sensibilidade retiniana em dB, nos 26 graus centrais do campo visual, em voluntários normais, distribuídos em grupos etários homogêneos. Comparar os valores da sensibilidade retiniana com aqueles considerados normais no pacote estatístico do programa do autoperímetro Octopus 1-2-3 obtidos por estudo multicêntrico realizado em 1994. MÉTODOS: Avaliaram-se 181 voluntários, distribuídos em

  18. Crise de feocromocitoma simulando um infarto agudo do miocárdio em paciente com artérias coronárias normais Pheochromocytoma-induced segmental myocardial dysfunction mimicking an acute myocardial infarction in a patient with normal coronary arteries

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    Eduardo S. Darzé

    2004-02-01

    Full Text Available Relatamos o caso de um paciente com alterações eletrocardiográficas e disfunção miocárdica segmentar induzidas por feocromocitoma, simulando infarto agudo do miocárdio. A angiografia coronariana foi normal e houve normalização completa do eletrocardiograma e ecocardiograma, após terapia com um bloqueador alfa-adrenérgico e ressecção do tumor. Espasmo coronariano foi o provável mecanismo envolvido na produção dessas alterações, ilustrando a importância de manter um alto grau de suspeição clínica em pacientes com evento miocárdico inesperado em meio a uma crise hipertensiva.We report a case of pheochromocytoma-induced segmental myocardial dysfunction and electrocardiographic abnormalities mimicking an acute anterior myocardial infarction, probably due to coronary spasm. Coronary angiography showed normal coronaries, and the electrocardiographic and echocardiographic changes resolved completely after therapy with an alpha-adrenergic blocker and tumor removal. Our case illustrates the importance of maintaining a high index of suspicion in patients presenting with an unexpected myocardial event and a hypertensive crisis.

  19. Diferencias en funciones ejecutivas en escolares normales, con trastorno por déficit de atención e hiperactividad, trastorno del cálculo y condición comórbida

    OpenAIRE

    GAITÁN CHIPATECUA, ALEXANDRA; REY-ANACONA, CESAR ARMANDO

    2013-01-01

    El objetivo del presente estudio descriptivo-comparativo fue comparar el desempeño en funciones ejecutivas de escolares entre ocho y trece años con trastorno por déficit de atención e hiperactividad (TDAH), trastorno del cálculo (TC), TDAH+TC y controles normales. Los diagnósticos se confirmaron a través de una entrevista clínica semiestructurada, un cuestionario clínico de déficit atencional y pruebas de cálculo matemático. Se encontraron diferencias estadísticamente significativas entre los...

  20. Temporomandibular joint - normal features and disc displacements: magnetic resonance imaging; Articulacao temporomandibular - aspectos normais e deslocamentos de disco: imagem por ressonancia magnetica

    Energy Technology Data Exchange (ETDEWEB)

    Ramos, Ana Carolina Araujo; Sarmento, Viviane Almeida; Campos, Paulo Sergio Flores; Gonzalez, Maria Olivia Dias [Bahia Univ., Salvador, BA (Brazil). Faculdade de Odontologia]. E-mail: ana_carolinaramos@hotmail.com

    2004-12-01

    Disc displacement of the temporomandibular joint has been defined as an abnormal relationship between the articular disc and the mandibular condyle, fossa and articular eminence. Disc displacements may occur without immediate interference in the function of the joint. Magnetic resonance imaging shows high diagnostic accuracy in the determination of articular disc position and has been indicated as the diagnostic method of choice for soft tissue abnormalities of the temporomandibular joint. The aim of this study is to review the literature including the normal features and different types of disc displacement of the temporomandibular joint as well as the imaging findings, emphasizing the role of magnetic resonance imaging. (author)

  1. Oral candidosis by Candida albicans in normal and xerostomic mice Candidose oral por Candida albicans em camundongos normais e xerostômicos

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    Marilda Aparecida Gonçalves Totti

    2004-09-01

    Full Text Available The aim of this study was to analyze the effect of sialoadenectomy on the development of oral candidosis after one or four inoculations of Candida albicans. Initially, a suspension containing 10(8 cells/ml of C. albicans ATCC 36801 was prepared. Seventy-eight sialoadenectomized mice and a similar amount of mice with normal salivary flow received a single inoculation of C. albicans suspension. Another group with a similar number of mice received 4 inoculations. The control group consisted of 6 sialoadenectomized mice and 6 mice with normal salivary flow that were not inoculated with C. albicans. Candidosis development was studied histologically in the tongue of the animals 1, 2, 3, 5, and 8 days after inoculation and at 15-day intervals up to 165 days. According to the results obtained, it could be concluded that sialoadenectomy and a higher frequency of yeast inoculation influenced the presence and extension of candidosis lesions.O objetivo deste estudo foi analisar o efeito da sialoadenectomia sobre o desenvolvimento da candidose oral após uma ou quatro inoculações de Candida albicans. Inicialmente, uma suspensão contendo 10(8 células/ml de C. albicans ATCC 36801 foi preparada. Setenta e oito camundongos sialoadenectomizados e mesma quantidade de camundongos com fluxo salivar normal receberam uma única inoculação de suspensão de C. albicans. Outro grupo, com o mesmo número de camundongos, recebeu 4 inoculações. O grupo controle consistiu de 6 camundongos sialoadenectomizados e 6 com fluxo salivar normal que não foram inoculados com C. albicans. O desenvolvimento de candidose foi estudado histologicamente na língua dos animais em períodos de 1, 2, 3, 5 e 8 dias após a inoculação e em intervalos de 15 dias até 165 dias. De acordo com os resultados obtidos, conclui-se que a sialoadenectomia e uma maior freqüência de inoculação influenciaram na presença e extensão das lesões de candidose.

  2. Volúmenes pulmonares normales en pacientes con fibrosis pulmonar idiopática y enfisema Normal lung volumes in patients with idiopathic pulmonary fibrosis and emphysema

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    Juan Pablo Casas

    2008-08-01

    Full Text Available La fibrosis pulmonar idiopática (FPI es una enfermedad que se caracteriza por presentar un compromiso pulmonar de tipo restrictivo, resultante de una reducción en la complacencia pulmonar secundaria a fibrosis difusa. En el enfisema, la pérdida de elasticidad pulmonar y el colapso de las vías aéreas periféricas generan obstrucción e hiperinflación. El efecto simultáneo que ambas enfermedades producen sobre la fisiología pulmonar no es del todo claro y se han descripto volúmenes pulmonares normales o casi normales. Presentamos 4 pacientes de sexo masculino de 64, 60, 73 y 70 años, con antecedentes de tabaquismo e historia de disnea progresiva, tres de ellos con grave limitación en su calidad de vida al momento de la consulta. En la tomografía de tórax de alta resolución todos los pacientes presentaban signos de enfermedad intersticial pulmonar avanzada, con cambios de tipo fibrótico con predominio basal y subpleural, que coexistían con enfisema centroacinar con predominio en lóbulos superiores. Uno de ellos tuvo confirmación diagnóstica de ambas condicioes por biopsia pulmonar a cielo abierto. En los cuatro pacientes la espirometría y volúmenes pulmonares fueron normales, pero tenían importante compromiso del intercambio gaseoso evaluado mediante el test de caminata de 6 minutos. Tres de los pacientes tenían hipertensión pulmonar grave diagnosticado por ecocardiograma. La presencia de volúmenes pulmonares normales no excluye un diagnóstico de fibrosis pulmonar idiopática en pacientes fumadores si coexisten evidencias tomográficas de enfisema. En estos pacientes el grado de compromiso funcional, determinado por la reducción de los volúmenes pulmonares, no debería ser considerado en la evaluación de la gravedad.Pulmonary function tests in idiopathic pulmonary fibrosis characteristically show a restrictive pattern, resulting from reduction of pulmonary compliance due to diffuse fibrosis. Conversely, an obstructive

  3. Increased Growth and Changes in Wheat Mineral Composition through Calcium Silicate Fertilization under Normal and Saline Field Conditions Aumento de Crecimiento y Cambios en la Composición Mineral de Trigo por Fertilización con Silicato de Calcio bajo Condiciones de Campo Normales y Afectadas por Sales

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    Ali Anser

    2012-03-01

    Full Text Available Salinity stress is a major and ever-present threat to crop production, especially where irrigation is necessary for agriculture. Two independent field experiments were carried out in natural non-saline (site-I; electrical conductivity [EC] El estrés salino es un riesgo importante y siempre presente para la producción de cultivos, especialmente donde el riego es una inevitable ayuda a la agricultura. Se realizaron dos experimentos de campo independientes en campos no salino natural (sitio I; conductividad eléctrica [EC] < 4 dS m-1 y salino (sitio II; EC = 10-13.8 dS m-1 para probar la eficacia de diferentes dosis de Si (0, 75, y 150 mg kg-1 en dos cultivares de trigo (Triticum aestivum L. difiriendo en susceptibilidad a sales: 'Auqab-2000' (sensible a sales y 'SARC-5' (tolerante a sales. El cultivo se cosechó a la madurez y se registraron varios parámetros iónicos y de rendimiento. Se observó que el aumento concomitante en número de macollas, número de granos por espiga, rendimiento de grano, y rendimiento biológico se debió a aplicación de Si bajo condiciones de campo óptimas y afectadas por sales. Se concluyó que 'SARC-5' rinde mejor que 'Auqab-2000' bajo condiciones de estrés salino. Efectos casi similares por aplicación de Si se observaron para ambos cultivares independiente de la sensibilidad a sales y su inclusión en el campo ya sea salino o no salino aumentó el crecimiento del trigo mejorando la relación K+:Na+ adversamente influenciada por el estrés salino.

  4. Short-term risk of cervical intraepithelial neoplasia grades 2 and 3 for women with normal cytology and human papillomavirus infection Riesgo a corto plazo de lesiones intraepiteliales cervicales grados 2 y 3 en mujeres con citología vaginal normal e infección por el virus del papiloma humano

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    Gustavo Hernández-Suárez

    2010-12-01

    Full Text Available OBJECTIVE. To assess the risk of cervical intraepithelial neoplasia grades 2, 3 or higher (CIN 2/3+ for women with normal cytology and concurrent high-risk human papillomavirus infection (HR-HPV. MATERIAL AND METHODS. We examined 2 200 women every 6 months for an average of 9 years. Cervical smears and samples for HPV DNA were obtained at each visit. Absolute risk of subsequent CIN2/CIN3+ was estimated using the Kaplan-Meier method. RESULTS. The absolute risk of CIN2/CIN3+ among HR-HPV-positive women with normal Pap smear results was 1.06% (95%CI, 0.57-2.20, 5 times higher the risk among all women with normal Pap smears (0.20%; 95%CI, 0.12-0.32 but 7 times lower than that for women with HR-HPV infection and LSIL (7.24%; 95%CI, 3.78-15.2. CONCLUSION. Short-term absolute risk of CIN2/3+ after a normal Pap smear with concurrent HR-HPV infection is low (~1%, suggesting that the HR-HPV test has limited utility in short-term clinical decision-making for women with normal cytology.OBJETIVO. Evaluar el riesgo a corto plazo de neoplasia intraepitelial cervical de alto grado (CIN2/CIN3+ en mujeres con citologí-a cervicouterina normal e infección por virus del papiloma humano de alto riesgo (HR-HPV. MATERIAL Y MÉTODOS. Cohorte prospectiva de 2200 mujeres evaluadas cada seis meses durante 9 años en promedio. En cada visita se tomó muestra cervical para extendido y detección de HPV DNA. El riesgo absoluto de CIN2/CIN3+ a la siguiente visita fue calculado utilizando el método de Kaplan-Meier. RESULTADOS. En mujeres con citologí-a normal e infección concomitante por HR-HPV el riesgo absoluto de presentar CIN2/CIN3+ fue de 1.06% (95%CI, 0.57-2.20. Este riesgo fue cinco veces mayor al observado en todas las mujeres con citologí-a normal (0.20%; 95%CI, 0.12-0.32 pero siete veces menor que el observado en mujeres con lesiones intraepiteliales escamosas de bajo grado con infección concomitante (7.24%; 95%CI, 3.78-15.2. CONCLUSIÓN. El riesgo absoluto de

  5. Diferencias en funciones ejecutivas en escolares normales, con trastorno por déficit de atención e hiperactividad, trastorno del cálculo y condición comórbida

    Directory of Open Access Journals (Sweden)

    Alexandra Gaitán Chipatecua

    2013-01-01

    Full Text Available El objetivo del presente estudio descriptivo-comparativo fue comparar el desempeño en funciones ejecutivas de escolares entre ocho y trece años con trastorno por déficit de atención e hiperactividad (TDAH, trastorno del cálculo (TC, TDAH+TC y controles normales. Los diagnósticos se confirmaron a través de una entrevista clínica semiestructurada, un cuestionario clínico de déficit atencional y pruebas de cálculo matemático. Se encontraron diferencias estadísticamente significativas entre los grupos en atención visual y auditiva, fluidez verbal fonémica, flexibilidad cognitiva, organización y planeación. Los resultados indican, de manera similar que investigaciones anteriores, que los escolares con TDAH+TC presentan mayores déficits en funciones ejecutivas que los niños normales.

  6. Determination of boron by ICP-AES in normal and malignant cells incubated 'in vitro' with fructose {sup 10}BPA; Determinacion de boro por ICP-AES para el estudio de captacion por celulas malignas y normales incubadas 'in vitro' con fructosa-BPA

    Energy Technology Data Exchange (ETDEWEB)

    Garavaglia, Ricardo N; Farias, Silvia S; Rodriguez, Ruben E; Servant, Roberto E; Liberman, Sara; Pisarev, Mario A; Batistoni, Daniel A [Comision Nacional de Energia Atomica, General San Martin (Argentina). Dept. de Quimica

    1999-07-01

    This paper describes the development and optimization of methodology for total boron concentration in cell cultures coming from fixation and accumulation of this element by normal and malignant cells. On account of sample mass and low volume resulting from dilution, generally about 1 mL, a procedure for automatic injection of micro volumes was designed, developed and optimized. Iron interference was carefully studied. Linear calibration curves were obtained for 50 to 2500 ng B/mL range. Determination limits were 10 and 20 ng B/mL for B 249.772 nm and 249.677 nm, respectively. Repeatability, expressed as relative standard deviation was better than 5% for a 100 ng B/mL. Recovery of analyte added to real samples ranged between 95 and 103%. The method was applied to studies on F-98 cells (rat glioma) and normal glia in BNCT project frame. (author)

  7. Características cinefluoroscópicas de ocho modelos de prótesis mecánicas bivalvas implantadas en la República Argentina: su valor complementario al ecocardiograma Doppler color

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    Tomás F. Cianciulli

    2008-01-01

    Full Text Available Los diferentes modelos de prótesis valvulares mecánicas son numerosos y su reconocimiento por ecocardiografía es difícil. La cinefluoroscopia (CF puede complementar su identificación y su evaluación.Objetivos1 Describir las características cinefluoroscópicas de cada prótesis para su identificación. 2 Evaluar su función mediante la comparación de los gradientes del eco-Doppler con el ángulo de apertura de los discos basculantes en la CF. 3 Reconocer la capacidad de la CF para diferenciar prótesis normales de prótesis disfuncionantes.Material y métodosSe evaluaron prospectivamente 219 prótesis implantadas en 191 pacientes. Se excluyeron 14 prótesis debido a la coexistencia de disfunción sistólica ventricular izquierda grave. El análisis se realizó sobre 205 prótesis (142 aórticas y 63 mitrales.ResultadosA través de las características del anillo y de los discos, mediante la CF se logró identificar el modelo de la prótesis en el 100% de las válvulas. La movilidad de los discos permitió diferenciar prótesis normales de disfuncionantes (ángulo de apertura 79,3° ± 5,4° versus 58,7° ± 15°, respectivamente. En la CF no se pudieron perfilar los discos y/o el anillo en el 3,9% de las prótesis aórticas y en el 19,2% de las mitrales.De las 142 prótesis aórticas, el eco-Doppler identificó 112 normales y 30 disfuncionantes y de las 63 prótesis mitrales identificó 52 normales y 11 disfuncionantes.Al correlacionar ambos métodos, la sensibilidad, la especificidad, el valor predictivo positivo y el valor predictivo negativo de la fluoroscopia para diferenciar prótesis normales de disfuncionantes fueron del 71%, 93%, 67% y 94%, respectivamente.Conclusiones1 Cada modelo de prótesis valvular tiene características cinefluoroscópicas que permiten su identificación. 2 La cinefluoroscopia evalúa el funcionamiento de las prótesis mecánicas y distingue una normal de una disfuncionante. 3 Cuando hay gradientes altos y

  8. Normatização do eletrorretinograma por reversão alternada de padrões em voluntários normais Standardization of pattern electroretinograms by alternate reversion in normal volunteers

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    Andréa Mara Simões Torigoe

    2003-08-01

    Full Text Available OBJETIVO: Realizar a normatização do eletrorretinograma por reversão alternada em indivíduos oftalmologicamente normais e sem doenças neurológicas associadas, determinando a faixa de normalidade estratificada por sexo, faixa etária e estímulo utilizado. MÉTODOS: A padronização seguiu o modelo proposto pela Organização Internacional de Eletrorretinografia e a normatização foi específica para o laboratório de potenciais evocados do Departamento de Neurologia da Faculdade de Ciências Médicas - Universidade Estadual de Campinas. Dois tipos de estímulos foram utilizados: o denominado estímulo 16, que proporciona ângulo visual de 60 minutos de arco e o de 32, que proporciona ângulo visual de 30. RESULTADOS: Em todos os pacientes obteve-se uma onda positiva, definida internacionalmente como P50 e uma negativa, chamada N95, sem a presença de artefatos. Foram observados intervalos de normalidade que continham a média das latências, amplitudes e durações das curvas positiva e negativa, internacionalmente aceitas. As ondas P50 e N95 apresentaram diferenças significativas na amplitude, latência e duração quando comparadas às diversas faixas etárias, ocorrendo diminuição na amplitude das ondas e aumento na latência total do eletrorretinograma com o aumento da idade. Construíram-se tabelas com intervalo de predição de 95% em relação à idade para a amplitude, latência e duração das curvas P50 e N95. CONCLUSÕES: A normatização do eletrorretinograma por reversão alternada proporciona a reprodutibilidade dos resultados e a possibilidade de estudos comparativos.PURPOSE: To standardize recordings of pattern electroretinograms (PERG in normal human subjects. METHODS: The standardization followed the model proposed by the International Organization of Eletroretinography and was specific for the laboratory of evoked potentials of the Department of Neurology, Faculty of Medical Sciences, State University of Campinas

  9. Embolismo paradójico inminente evidenciado por ecocardiografía en pacientes con foramen ovale persistente Imminent paradoxical embolism evidenced by echocardiography in patients with patent foramen ovale

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    Luis E Mayorga

    2008-10-01

    Full Text Available Paciente de género masculino, de 72 años de edad, con antecedente de trombo-embolismo pulmonar, quien ingresó por evento cerebro-vascular isquémico y en quien en el ecocardiograma trans-torácico y luego en el trans-esofágico, se encontró una masa móvil que sugería un trombo que traspasaba el foramen ovale permeable. Ante el diagnóstico de embolismo paradójico inminente, se consideró realizar trombectomía quirúrgica, la cual se difirió por infección y se inició anticoagulación con heparina de bajo peso molecular. Se realizó un ecocardiograma de control y se observó que la masa había desaparecido por completo. Se dio de alta con anticoagulación oral.A 72 years old male patient with previous history of pulmonary thrombosis was admitted with an ischemic stroke. In a transtoraxic echocardiogram, as well as in a posterior transesophagic one, a mobile mass suggesting a thrombus going through a patent foramen ovale, was found. Facing an imminent paradoxical embolism, surgical thrombectomy was considered that could no be realized due to infection. Anticoagulation with low molecular weight heparin was initiated. A control echocardiogram showed complete disappearance of the mass. The patient was discharged with oral anticoagulation.

  10. Proteínas totais do liquido cefalorraqueano obtido por punção da cisterna magna: valores normais. Variações ligadas ao sexo Total protein content of normal cisternal cerebrospinal fluid: Variations related to sex

    Directory of Open Access Journals (Sweden)

    L. M. Singer Vermes

    1976-12-01

    Full Text Available Aplicando o método de Lowry, determinamos as proteínas totais do LCR considerado normal de 98 pessoas: 58 do sexo masculino e 40 do feminino. Todas as amostras de LCR foram obtidas por punção da cisterna magna (LCR-SO. Mediante tratamento estatístico dos valores obtidos, estabelecemos as taxas normais de proteinorraquia cisternal para a população mista: limite superior de 40,36 mg/100 ml, valor médio de 26,78 mg/100 e limite inferior de 13,20 mg/100 ml. Estes valores são superiores àqueles referidos na literatura. Foi verificado que a proteinorraquia total é, em média, significantemente maior nos indivíduos do sexo masculino, que nos de feminino. Consequentemente estabelecemos em separado os níveis normais de proteínas totais do LCR-SO para pessoas do sexo masculino e feminino. As taxas médias de proteínas totais do LCR-SO de pessoas do sexo masculino e feminino são de 28,76 e 23,91 mg/100 ml, respectivamente; os limites normais vão de 16,96 a 47,13 mg/100 ml para o sexo masculino e de 14,76 a 42,76 mg/100 ml para o sexo feminino.The total protein content of CSF collected from the cisterna magna (cisternal fluid of 98 patients (58 males and 40 females with no neurological diseases was determined by the colorimetric method devised by Lowry and co-workers. This method has been previously chosen based mainly on it's sensitivity, accuracy and low fluid consumption. The CSF samples were normal with regard to pressure, color, citology and it's content in glucose, chloride and urea. Complement fixation tests for syphilis and cisticercosis, as well as the globulin tests (Pandy, Nonne — Appelt and Takata-Ara were negative. The average value and the normal range of cisternal fluid total protein was calculated for the mixed population (males and females. The mean protein value was 26.78 mg/100 ml, the lower and upper limits were respectively 13.20 and 40.36 mg/100 ml. These data are higher than those stated in some publications, and

  11. Enfermedad cardiovascular en pacientes cubanos afectados por Ataxia de Friedreich.

    Directory of Open Access Journals (Sweden)

    Tania Cruz Mariño

    2010-01-01

    Full Text Available Al describir la ataxia de Friedreich, Nicholaus hizo referencia a la patología cardiaca. Esta enfermedad autosómica recesiva se debe a una mutación dinámica en el gen FRDA, codificándose deficientemente la proteína Frataxina, conduciendo a estrés oxidativo y muerte celular cardiaca. La presente investigación se desarrolló con el objetivo de describir las anomalías cardiovasculares presentes en los pacientes cubanos afectados por ataxia de Friedreich. A los individuos con diagnóstico molecular confirmatorio de la enfermedad se les realizó electrocardiograma y ecocardiograma, así como evaluación clínica mediante escalas validadas internacionalmente: ICARS y SARA. Los trastornos de repolarización ventricular difusos, los trastornos de conducción intraauricular, así como los trastornos de la función diastólica resultaron hallazgos frecuentes. El patrón restrictivo apreciado provee evidencia invivo de que la enfermedad conduce a disfunción diastólica del ventrículo izquierdo. La ocurrencia de un Infarto Agudo del Miocardio silente indica la importancia de identificar formas incipientes de afectación miocárdica.

  12. Como o ecocardiograma pode ser útil em predizer a morte em crianças com cardiomiopatia dilatada idiopática? How can the echocardiogram be useful for predicting death in children with idiopathic dilated cardiomyopathy?

    Directory of Open Access Journals (Sweden)

    Vitor Manuel Pereira Azevedo

    2004-06-01

    Full Text Available OBJETIVO: Determinar os fatores preditores ecocardiográficos de morte em crianças com cardiomiopatia dilatada idiopática. MÉTODOS: Estudo retrospectivo de 148 crianças com cardiomiopatia dilatada idiopática diagnosticadas entre setembro/1979 a março/2003. Critérios para inclusão: insuficiência cardíaca e redução da contratilidade no ecocardiograma, na ausência de cardiopatia congênita ou secundária. Foram analisados 470 exames, durante 244,8 meses de evolução. Parâmetros analisados: dimensão do átrio esquerdo (DAE, relação átrio esquerdo/aorta (DAE/Ao, dimensão sistólica (DSVE e diastólica (DDVE do VE, massa do VE (massa, dimensão do ventrículo direito (DVD, fração de ejeção do VE (FE, percentagem de encurtamento do VE (%EC, gravidade da insuficiência das valvas atrioventriculares e da valva pulmonar e medida da pressão sistólica (PsVD e diastólica (PdVD do VD. Foi considerado significativo erro alfa OBJECTIVE: To determine the echocardiographic predicting factors of death in children with idiopathic dilated cardiomyopathy. METHODS: A retrospective study of 148 children with idiopathic dilated cardiomyopathy diagnosed between September 1979 and March 2003 was carried out. The inclusion criteria were as follows: heart failure and a reduction in contractility on the echocardiogram in the absence of congenital or secondary heart disease. Four hundred and seventy examinations during a period of 244.8 months of evolution were analyzed. The following parameters were assessed: left atrial dimension (LAD; left atrium/aorta ratio (LAD/Ao; left ventricular systolic (LVSD and diastolic (LVDD dimensions; left ventricular mass (LVmass; right ventricular dimension (RVD; left ventricular ejection fraction (LVEF; left ventricular shortening fraction (% SH; severity of the insufficiency of the atrioventricular and pulmonary valves; and right ventricular systolic (RVSP and diastolic (RVDP pressures. The significance level

  13. Comparação da adequação de solicitação de ecocardiograma entre hospitais público e privado Comparison of echocardiography request appropriateness between public and private hospitals

    Directory of Open Access Journals (Sweden)

    Flávia Candolo Pupo Barbosa

    2011-10-01

    Full Text Available FUNDAMENTO: Buscando aprimorar a utilização dos exames de ecocardiografia, foram criados os Critérios de Adequação (CA (Appropriateness Criteria, pela Sociedade Norte-Americana de Ecocardiografia (ASE /Colégio Americano de Cardiologia (ACC. OBJETIVO: Comparar o perfil de adequação de solicitação de ecocardiograma transtorácico (ETT de acordo com os CA, entre Hospital Público Universitário (HU e Hospital Privado (HP, e verificar quais características se associam com melhor perfil de solicitação de ETT. MÉTODOS: Foram avaliados prospectivamente 779 solicitações consecutivas de ETT no HP (49,8% e no HU (50,2%. Sendo 55,6% solicitações para mulheres e 44,4%, para homens com 59,1 ± 15,7 anos. As indicações foram classificadas como: apropriadas, inapropriadas ou não classificadas, e a adequação aos CA foi correlacionada com idade, sexo dos pacientes, além do tempo de formado do solicitante. A análise estatística empregou Coeficiente Kappa e teste Qui-quadrado. RESULTADOS: Não houve diferença significativa no perfil de adequação de solicitações apropriadas de ETT nas duas instituições (71% x 75%; p = 0,3. No HP, os fatores associados a maior taxa de exames apropriados foram: sexo feminino (p = 0,001 e idade menor que 60 anos (p BACKGROUND: Aiming at improving the use of echocardiography tests, the Appropriateness Criteria (AC were created by the American Society of Echocardiography (ASE/American College of Cardiology (ACC. OBJECTIVE: To compare the appropriateness profile of transthoracic echocardiography (TTE requests in accordance with the AC, between a public University Hospital (UH and a Private Hospital (PH, and verify which characteristics are associated with a better TTE request profile. METHODS: We prospectively assessed 779 consecutive TTE requests in a PH (49.8% and a UH (50.2%, with 55.6% of requests for women and 44.4% for men, aged 59.1 ± 15.7 years. The indications were classified as appropriate

  14. Insuficiência cardíaca com fração de ejeção normal Insuficiencia cardíaca con fracción de eyección normal Heart failure with normal ejection fraction

    Directory of Open Access Journals (Sweden)

    Meliza Goi Roscani

    2010-05-01

    Full Text Available A insuficiência cardíaca com fração de ejeção normal (ICFEN é uma síndrome complexa que vem sendo largamente estudada, desde a última década. É causada por disfunção ventricular diastólica evidenciada por métodos complementares, como estudo hemodinâmico ou ecocardiograma, na presença de fração de ejeção preservada. Acomete preferencialmente indivíduos mais idosos e com comorbidades, como hipertensão arterial sistêmica, insuficiência coronariana e obesidade. Os mecanismos fisiopatológicos são complexos e multifatoriais, envolvendo a rigidez passiva do miocárdio, a geometria ventricular, a força de contenção do pericárdio e a interação entre os ventrículos. Os objetivos principais do tratamento são reduzir a congestão venosa pulmonar, a frequência cardíaca e controlar as comorbidades. Ainda não há evidências fortes de que o uso de medicações específicas, como inibidores de enzima de conversão ou betabloqueadores, interfiram na mortalidade. Os fatores de pior prognóstico incluem a idade avançada, presença de disfunção renal, diabete, classe funcional III e IV (NYHA e estágio avançado de disfunção diastólica, com padrão restritivo ao enchimento ventricular. Outro aspecto que vem ganhando espaço na literatura é o questionamento do papel da disfunção sistólica nos quadros de ICFEN. Todos esses aspectos são abordados detalhadamente na presente revisão.La insuficiencia cardíaca con fracción de eyección normal (ICFEN es un síndrome complejo que viene siendo ampliamente estudiado desde la última década. Es causado por disfunción ventricular diastólica manifestada por métodos complementarios como estudio hemodinámico o ecocardiograma, en presencia de fracción de eyección preservada. Afecta preferentemente a individuos más añosos y con comorbilidades, como hipertensión arterial sistémica, insuficiencia coronaria y obesidad. Los mecanismos fisiopatológicos son complejos y

  15. A estimulação cardíaca convencional é prejudicial em pacientes com função ventricular normal?

    Directory of Open Access Journals (Sweden)

    Luiz Antonio Batista de Sá

    2013-12-01

    Full Text Available FUNDAMENTO: A estimulação de ventrículo direito pode ser deletéria em pacientes com disfunção ventricular, porém, em pacientes com função normal, o impacto desta estimulação desencadeando disfunção ventricular clinicamente relevante não é completamente estabelecido. OBJETIVOS: Avaliar a evolução clínica, ecocardiográfica e laboratorial de pacientes, com função ventricular esquerdapreviamente normal, submetidos a implante de marca-passo. MÉTODO: Estudo observacional transversal em que foram acompanhados de forma prospectiva 20 pacientes submetidos a implante de marca-passo com os seguintes critérios de inclusão: função ventricular esquerda normal definida pelo ecocardiograma e estimulação ventricular superior a 90%. Foram avaliados: classe funcional (CF (New York Heart Association, teste de caminhada de 6 minutos (TC6, dosagem do hormônio natriurético tipo B (BNP, avaliação ecocardiográfica (convencional e parâmetros de dessincronismo e questionário de qualidade de vida (QV (SF-36. A avaliação foi feita com dez dias (t1, quatro meses (t2, oito meses (t3, 12 meses (t4 e 24 meses (t5. RESULTADOS: Os parâmetros ecocardiográficos convencionais e de dessincronismo não apresentaram variação estatística significante ao longo do tempo. O TC6, a CF e a dosagem de BNP apresentaram piora ao final dos dois anos. A QV teve melhora inicial e piora ao final dos dois anos. CONCLUSÃO: O implante de marca-passo convencional foi associado à piora da classe funcional, piora do teste de caminhada, aumento da dosagem de BNP, aumento da duração do QRS e piora em alguns domínios da QV ao final de dois anos. Não houve alterações nas medidas ecocardiográficas (convencionais e medidas de assincronia.

  16. Papel do ecocardiograma na avaliação ventricular do coração transplantado versus rejeição cardíaca Role of echocardiography in the ventricular assessment of the transplanted heart versus heart rejection

    Directory of Open Access Journals (Sweden)

    Gabriel Antonio Stanisci Miguel

    2012-11-01

    Full Text Available FUNDAMENTO: O Transplante Cardíaco (TC é uma alternativa para os indivíduos com doença cardíaca terminal. Na evolução pós-transplante, a ocorrência de episódios de Rejeição Cardíaca (RC é evento frequente que aumenta a morbimortalidade, sendo necessário o emprego de exame não invasivo com boa acurácia para seu diagnóstico, pois a Biópsia Endomiocárdica (BEM não é um procedimento isento de complicações. OBJETIVO: Comparar parâmetros obtidos com o princípio Doppler, entre os pacientes transplantados com RC (TX1 e os pacientes transplantados sem rejeição (TX0; utilizando como referência o Grupo Controle (GC e observando o comportamento da função sistodiastólica ventricular esquerda expressa por meio do Índice de Performance Miocárdica (IPM. MÉTODOS: Foram realizados ecocardiogramas transtorácicos no período de janeiro de 2006 a janeiro de 2008, para a avaliação prospectiva de 47 pacientes, subdivididos em GC (36,2%, TX0 (38,3% e TX1 (25,5%, comparando-se o IPM entre eles. Para a análise dos dados foram realizados os testes exato de Fisher e o não paramétrico de Kruskal-Wallis, ambos com nível de significância de 5%. RESULTADOS: Os grupos não diferiram em relação a idade, peso, altura e superfície corpórea. Quando comparado ao GC, TX0 e TX1 apresentaram alteração da função sistodiastólica ventricular esquerda, expressa como aumento do IPM, que foi mais intenso no TX1 [0,38 (0,29 - 0,44 X 0,47 (0,43 - 0,56 X 0,58 (0,52 - 0,74 p BACKGROUND: Heart transplantation is an alternative for individuals with end-stage heart disease. However, episodes of heart rejection (HR are frequent and increase morbidity and mortality, requiring the use of an accurate non-invasive exam for their diagnosis, since endomyocardial biopsy (EMB is not a complication-free procedure. OBJECTIVE: To compare the parameters obtained by use of Doppler echocardiography in a group of transplanted patients with HR (TX1 and another

  17. Do estudo dos potenciais de média latência eliciados por logon em sujeitos do sexo feminino com audição normal A study of logon-evoked middle latency responses in female subjects with normal hearing

    Directory of Open Access Journals (Sweden)

    Erika Maria Fukushima

    2007-06-01

    Full Text Available Os potenciais de média latência são potenciais auditivos que ocorrem entre 10ms a 80ms, formados por ondas polifásicas positivas e negativas denominadas de N0, P0, Na, Pa, Nb e Pb. O logon é um estímulo acústico que permite eliciar respostas de média latência ativando regiões específicas da cóclea. Sua vantagem sobre o clique é a possibilidade avaliar as áreas de baixa freqüência (abaixo de 1kHz. OBJETIVO: O objetivo deste trabalho foi verificar a resposta eletrofisiológica das MLR estimulados por logon nas freqüências de 500, 1000 e 2000 Hz. CASUÍSTICA E MÉTODO: Forma de estudo prospectivo e descritivo de uma amostra de 14 voluntárias do sexo feminino, normais dos pontos de vista otológico e audiológico convencional. O estímulo foi monoaural e ipsilateral à derivação de captação dos potenciais (Cz/A1-2. RESULTADOS: O complexo NaPa foi o mais facilmente identificado e esteve presente em 100% dos exames realizados a 2000 Hz e em 96,4% a 500 e 1000 Hz. CONCLUSÕES: As MLR podem se eliciadas pelo logon nas freqüências de 500, 1000 e 2000 Hz; o complexo NaPa foi o evento prevalente das MLR e o estímulo logon a 2000 Hz eliciou maior número de respostas do que as outras freqüências.The middle latency response (MLR to an acoustic stimulus occurs between 10 and 80 ms. The waveform is characterized by a series of peaks and troughs labeled N0, P0, Na, Pa, Nb and Pb. Certain acoustic stimuli may excite specific cochlear areas in contrast with clicks, that activate the cochlea between 1000 and 4000 Hz. The logon stimulus activates segmentar areas of the cochlea and has advantages over clicks when assessing low frequency areas of the cochlea (below 1 kHz. AIM: The aim of this paper was to study the MLR electrophysiologic response when activated by logon stimuli at 500, 1000 and 2000 Hz. Method- a prospective and descriptive study. 14 female volunteers had normal otology and conventional audiology results. The stimulus was

  18. Clarifying Normalization

    Science.gov (United States)

    Carpenter, Donald A.

    2008-01-01

    Confusion exists among database textbooks as to the goal of normalization as well as to which normal form a designer should aspire. This article discusses such discrepancies with the intention of simplifying normalization for both teacher and student. This author's industry and classroom experiences indicate such simplification yields quicker…

  19. Cistatina C como predictor de síndrome cardio-renal y mal pronóstico en pacientes internados por insuficiencia cardíaca aguda y función renal normal

    Directory of Open Access Journals (Sweden)

    Iván Constantin

    2016-01-01

    Full Text Available Introducción: El desarrollo de disfunción renal en el contexto de una falla cardíaca aguda se conoce como síndrome cardiorrenal (SCR tipo 1. El empeoramiento de la función renal (EFR durante la internación es un predictor de mal pronóstico. La cistatina C ha surgido como un marcador de función renal alternativo a la creatinina. Objetivo: Demostrar la utilidad clínica de la cistatina C como predictor de EFR y factor pronóstico en pacientes con insuficiencia cardíaca aguda y sin disfunción renal evaluada por creatinina al ingreso. Material y métodos: Se llevó a cabo un estudio observacional, prospectivo, de pacientes consecutivos con diagnóstico de insuficiencia cardíaca aguda y sin disfunción renal, definida como un valor de creatinina < 1,3 mg/dl al ingreso. Se realizó un dosaje de cistatina C al ingreso. El punto final primario fue EFR y los secundarios fueron mortalidad hospitalaria, mortalidad total y reinternación por insuficiencia cardíaca. Resultados: Se incluyeron 166 pacientes con una mediana de edad de 85 años (IIC 77,7-89. La incidencia de EFR fue del 29,7%, con una mortalidad hospitalaria del 3,1% y una mortalidad total del 24,4%. La mediana de seguimiento fue de 193 días. El valor de cistatina C fue significativamente mayor en los pacientes que desarrollaron EFR (1,72 ± 0,58 mg/dl vs. 1,51 ± 0,41 mg/dl; p = 0,03 y en los pacientes que murieron en el seguimiento (1,76 ± 0,49 mg/dl vs. 1,51 ± 0,46 mg/dl; p = 0,004. La cistatina C resultó un predictor independiente de mortalidad (OR 3,03, IC 95% 1,22-7,47 y de EFR (OR 2,38, IC 95% 1,02- 5,5 en el análisis multivariado. Se halló un punto de corte óptimo de 1,6 mg/dl de cistatina, con una sensibilidad del 61,22% y una especificidad del 60,34% para el desarrollo de EFR y del 61,54% y 61,98%, respectivamente, para mortalidad total. Conclusión: El valor de cistatina C al ingreso es predictor de desarrollo de EFR durante la internación y de mayor mortalidad en

  20. Birkhoff normalization

    NARCIS (Netherlands)

    Broer, H.; Hoveijn, I.; Lunter, G.; Vegter, G.

    2003-01-01

    The Birkhoff normal form procedure is a widely used tool for approximating a Hamiltonian systems by a simpler one. This chapter starts out with an introduction to Hamiltonian mechanics, followed by an explanation of the Birkhoff normal form procedure. Finally we discuss several algorithms for

  1. Endocarditis infecciosa en válvula aórtica por Aggregatibacter aphrophilus

    Directory of Open Access Journals (Sweden)

    Ana Luísa Broa

    Full Text Available Resumen Hoy día, la endocarditis infecciosa continúa siendo una causa importante de mor-bimortalidad en todo el mundo y es preocupante el aumento del número de infecciones asociadas con agentes virulentos y procedimientos médicos. Presentamos el caso de un indigente con antecedentes médicos desconocidos, ingresado por dolor lumbar, que comenzó a sentirse confuso, hipotenso y taquicárdico. Poco después de su ingreso su estado evolucionó a septicemia grave. Los resultados de las pruebas iniciales también eran indicativos de infarto agudo de miocardio, pero el ecocardiograma transtorácico reveló una vegetación masiva en la válvula aórtica con absceso perivalvular condicionando regurgitación aórtica grave. El paciente murió, con el diagnóstico definitivo de endocarditis infecciosa. Más tarde, en los hemocultivos se identificó Aggregatibacter aphrophilus, un microorganismo del grupo HACEK. Este caso confirma que, a pesar de los resultados favorables en general, hay casos de infecciones graves, sobre todo si el diagnóstico y el tratamiento fueron tardíos.

  2. Percepção da associação entre estimulação ambiental e desenvolvimento normal por mães de crianças nos três primeiros anos de vida

    Directory of Open Access Journals (Sweden)

    Lila Isabel C. de Paula

    2013-06-01

    Full Text Available OBJETIVO: Avaliar a percepção das mães de crianças entre zero e três anos sobre a associação da estimulação ambiental e o desenvolvimento normal das crianças atendidas em uma unidade de saúde em São Luís, Maranhão, e identificar o nível de entendimento das mães quanto à estimulação do ambiente familiar em que a criança está inserida. MÉTODOS: Realizou-se pesquisa qualitativa exploratória. Os sujeitos estudados foram 15 mães de crianças de zero a três anos atendidas na Unidade de Saúde Antônio Carlos Reis, Cidade Olímpica, em São Luís, Maranhão, de outubro de 2009 a março de 2010. Os instrumentos da coleta de dados foram prontuários médicos, entrevistas semiestruturadas aplicadas em domicílio com pais, observação participante e visita domiciliar. RESULTADOS: A maioria das mães pesquisadas era adolescente, solteira, do lar, com ensino fundamental incompleto e renda familiar de 0 a 0,5 salário mínimo. As principais dificuldades encontradas foram: despreparo em educar os filhos, baixo nível de resolutividade das situações cotidianas e ausência paterna na convivência familiar. Analisou-se o modo como as mães associam as carências ambientais e o desenvolvimento infantil normal. CONCLUSÕES: As mães apresentaram percepção relativa ao ambiente em que seus filhos vivem e que a falta de estimulação nestes ambientes interfere no desenvolvimento de tais crianças. Observou-se, assim, a necessidade de melhora dos níveis de estimulação e dos vínculos entre criança, família e profissionais de saúde.

  3. Avaliação do processamento auditivo por meio do teste de reconhecimento de dissílabos em tarefa dicótica SSW em indivíduos com audição normal e ausência do reflexo acústico contralateral

    Directory of Open Access Journals (Sweden)

    Marotta Rosely Munhoz Bonilha

    2002-01-01

    Full Text Available Introdução: O Reflexo Acústico (RA é considerado uma importante ferramenta diagnóstica dos distúrbios da audição. Seu limiar está normal na faixa de 70 a 90 dBNS. Para que o RA ocorra, é necessária a integridade do sistema auditivo periférico e central principalmente ao nível do Tronco Encefálico (TE. Estruturas do TE relacionadas com o RA são também responsáveis pelo Processamento Auditivo (PA no que diz respeito a importantes habilidades auditivas. Objetivo: Neste estudo, procuramos verificar o desempenho de indivíduos com audição periférica normal e ausência do RA Contralateral no reconhecimento de dissílabos em tarefa dicótica por meio Teste SSW, versão em português. Forma de estudo: Clínico prospectivo randomizado. Material e Método: A casuística é composta de 100 indivíduos com idades de 19-59 anos, de ambos os sexos, distribuídos nos grupos Controle (n=50 e Estudo (n=50. O grupo Estudo apresenta audição periférica normal, e ausência do RA Contralateral em pelo menos uma freqüência testada. Resultados: Os grupos apresentaram diferenças estatisticamente significantes com relação à ausência do RA Contralateral e Ipsilateral em todas as freqüências testadas bilateralmente. Quanto aos resultados de normalidade do Teste SSW, as diferenças foram estatisticamente significantes nas condições de Direito e Esquerdo Competitivos e tendências de respostas de Efeito Auditivo, Efeito de Ordem e Tipo A. Na comparação por número de erros, houve diferenças estatisticamente significantes nas situações de Direito e Esquerdo Competitivos. Conclusões: Os resultados deste estudo reforçam a relevância do papel das estruturas responsáveis pelo RA no PA, sugerindo que pacientes com audição periférica normal e alterações do RA sejam submetidos à avaliação do PA.

  4. Malware Normalization

    OpenAIRE

    Christodorescu, Mihai; Kinder, Johannes; Jha, Somesh; Katzenbeisser, Stefan; Veith, Helmut

    2005-01-01

    Malware is code designed for a malicious purpose, such as obtaining root privilege on a host. A malware detector identifies malware and thus prevents it from adversely affecting a host. In order to evade detection by malware detectors, malware writers use various obfuscation techniques to transform their malware. There is strong evidence that commercial malware detectors are susceptible to these evasion tactics. In this paper, we describe the design and implementation of a malware normalizer ...

  5. Influencia del deterioro incipiente producido por el hongo de pudrición parda Serpula lacrymans, sobre las propiedades mecánicas de compresión normal y paralela a la fibra en madera de Pinus radiata D. Don

    Directory of Open Access Journals (Sweden)

    Pereira, A.

    2011-03-01

    Full Text Available Several buildings and structures of wood are attacked by rot fungi, leading in some cases, slight weight losses that result in reductions in the strength properties of the material. In this work was evaluated the influence of early rot decay in wood, in mechanical properties of normal and parallel compression. For this, were inoculated samples of Pinus radiata D. Don with brown rot fungi Serpula Lacrymans. These samples were tested in three differents periods of fungal exposure. The results identified a significant decrease in percentage of the properties under study.Diversas edificaciones y estructuras construidas en madera son atacadas por hongos de pudrición, provocando en algunos casos, leves pérdidas de peso que se traducen en disminución en las propiedades resistentes del material. En este trabajo se evaluó la influencia de estados incipientes de pudrición en madera, en las propiedades mecánicas de compresión paralela y compresión normal. Para esto, se inocularon probetas de Pinus radiata D. Don. con el hongo de pudrición parda Serpula lacrymans, las cuales fueron posteriormente ensayadas mecánicamente en tres diferentes períodos de exposición fúngica. Los resultados obtenidos determinaron una importante disminución porcentual de las propiedades bajo estudio.

  6. Normal accidents

    International Nuclear Information System (INIS)

    Perrow, C.

    1989-01-01

    The author has chosen numerous concrete examples to illustrate the hazardousness inherent in high-risk technologies. Starting with the TMI reactor accident in 1979, he shows that it is not only the nuclear energy sector that bears the risk of 'normal accidents', but also quite a number of other technologies and industrial sectors, or research fields. The author refers to the petrochemical industry, shipping, air traffic, large dams, mining activities, and genetic engineering, showing that due to the complexity of the systems and their manifold, rapidly interacting processes, accidents happen that cannot be thoroughly calculated, and hence are unavoidable. (orig./HP) [de

  7. Reconstructing Normality

    DEFF Research Database (Denmark)

    Gildberg, Frederik Alkier; Bradley, Stephen K.; Fristed, Peter Billeskov

    2012-01-01

    Forensic psychiatry is an area of priority for the Danish Government. As the field expands, this calls for increased knowledge about mental health nursing practice, as this is part of the forensic psychiatry treatment offered. However, only sparse research exists in this area. The aim of this study...... was to investigate the characteristics of forensic mental health nursing staff interaction with forensic mental health inpatients and to explore how staff give meaning to these interactions. The project included 32 forensic mental health staff members, with over 307 hours of participant observations, 48 informal....... The intention is to establish a trusting relationship to form behaviour and perceptual-corrective care, which is characterized by staff's endeavours to change, halt, or support the patient's behaviour or perception in relation to staff's perception of normality. The intention is to support and teach the patient...

  8. Pursuing Normality

    DEFF Research Database (Denmark)

    Madsen, Louise Sofia; Handberg, Charlotte

    2018-01-01

    implying an influence on whether to participate in cancer survivorship care programs. Because of "pursuing normality," 8 of 9 participants opted out of cancer survivorship care programming due to prospects of "being cured" and perceptions of cancer survivorship care as "a continuation of the disease......BACKGROUND: The present study explored the reflections on cancer survivorship care of lymphoma survivors in active treatment. Lymphoma survivors have survivorship care needs, yet their participation in cancer survivorship care programs is still reported as low. OBJECTIVE: The aim of this study...... was to understand the reflections on cancer survivorship care of lymphoma survivors to aid the future planning of cancer survivorship care and overcome barriers to participation. METHODS: Data were generated in a hematological ward during 4 months of ethnographic fieldwork, including participant observation and 46...

  9. Muerte súbita por conmoción cardíaca (Commotio cordis asociada a miocardio no compactado

    Directory of Open Access Journals (Sweden)

    Analía Aquieri

    2011-12-01

    Full Text Available El miocardio no compactado es una rara miocardiopatía congénita caracterizada por la presencia de múltiples y prominentes trabeculaciones profundas en la pared ventricular que definen hendiduras comunicantes con el compartimiento ventricular principal. Es una entidad de baja incidencia y prevalencia que se diagnostica mediante estudios de imágenes como el ecocardiograma Doppler (ED, la tomografía computarizada multicorte (TCM y la resonancia magnética cardíaca (RMC. Puede ser asintomática o manifestarse mediante arritmias, insuficiencia cardíaca o eventos tromboembólicos. Se presenta el caso de un hombre de 33 años, asintomático, que durante la práctica deportiva sufre una conmoción cardíaca (commotio cordis que le produce un paro cardiorrespiratorio. El electrocardiograma mostró un ritmo de aleteo ventricular que requirió cardiodesfibrilación eléctrica. En un ED efectuado inicialmente no se observaron anormalidades significativas, pero otro ED, una TCM y una RMN obtenidos luego del alta, certificaron el hallazgo de miocardio no compactado aislado, descartando coronariopatía. Recibió tratamiento beta bloqueante y antiagregante y se discutió la colocación del cardiodesfibrilador implantable. Se plantea la fisiopatología de la asociación de estas dos infrecuentes y potencialmente letales afecciones.

  10. Ecocardiograma e fatores de risco cardiovascular em obesos graves

    OpenAIRE

    Elaine Gonçalves Moreira Rocha, Isaura

    2003-01-01

    Introducão: Alterações em parâmetros hemodinâmicos e na função cardíaca ocorrem na obesidade grave, em associação a outros fatores de risco cardiovascular, como dislipidemia, hipertensão arterial e diabete melito. Material e métodos: Foi descrito o perfil clínico, metabólico, ecocardiográfico e o risco de doença cardiovascular, avaliado através do escore de Framingham, em 32 obesos graves candidatos à gastroplastia, no Hospital das Clínicas da Universidade Federal de Pernambuco, entre jane...

  11. Celulitis por citomegalovirus

    Directory of Open Access Journals (Sweden)

    A. Ruiz Lascano

    2002-12-01

    Full Text Available Las lesiones cutáneas por citomegalovirus (CMV son infrecuentes y a menudo una manifestación tardía de una enfermedad sistémica, que generalmente anuncia un curso fatal. Comunicamos un caso de celulitis por CMV: una mujer de 70 años con trasplante renal efectuado 1 mes antes de la consulta, terapia inmunosupresora con ciclosporina A y metilprednisona. La paciente ingresó por fiebre, dolor e impotencia funcional en pierna derecha. Comprobamos la existencia de una placa de 8 por 4 cm eritematoedematosa. La tratamos con antibióticos sin mejoría, por lo que realizamos un estudio histopatológico de piel que mostró cambios citopáticos compatibles con infección por CMV. Los cultivos bacteriológicos y micológicos fueron negativos. La inmunohistoquímica específica para CMV y el estudio de reacción en cadena de la polimerasa (PCR de la biopsia de piel fueron positivas, al igual que la antigenemia. El tratamiento con ganciclovir produjo la mejoría del cuadro clínico. En la literatura revisada no hemos encontrado la celulitis como manifestación de enfermedad cutánea por CMV.

  12. Partial left ventriculectomy in a child: 70-month clinical follow up Ventriculectomia parcial esquerda em criança: acompanhamento clínico por 70 meses

    Directory of Open Access Journals (Sweden)

    Eduardo Coelho de Souza

    2003-10-01

    Full Text Available We describe the 70- month follow up of a child with idiopathic dilated cardiomyopathy and end-stage congestive heart failure (NYHA III/IV who underwent partial left ventriculectomy - the Batista operation when he was two and half years old. The clinical follow up was performed in the outpatient clinic by electrocardiography, echocardiography and radionuclide ventriculography to better analyse the left ventricular ejection fraction. The left ventricular diameter increased. Echocardiograms showed enlargement mainly in the systolic left ventricular diameter and slow decrease in fractional shortening (delta D. The child was in class I (NYHA during the follow-up. His exercise endurance was better than before surgery and hospitalization was not necessary. For these reasons, we believe that this procedure can be considered as a therapeutic option in children with severe dilated cardiomiopathy who are waiting for heart transplantation, as the shortage of donors is a fact.Relatamos a evolução durante 70 meses de uma criança submetida a ventriculectomia parcial esquerda, pela técnica de Batista aos 2 anos e 6 meses de idade, em classe funcional III/IV em decorrência de cardiomiopatia dilatada idiopática, com seguimento clínico ambulatorial. Realizamos eletrocardiogramas, ecocardiogramas seriados e ventriculografia radioisotópica para melhor analisar a fração de ejeção do ventrículo esquerdo. Houve progressivo aumento deste. O ecocardiograma mostrou aumento principalmente do diâmetro sistólico do ventrículo esquerdo com queda progressiva, porém lenta, da fração de ejeção. Apesar da progressão da disfunção miocárdica, a criança manteve-se em classe funcional I durante todo o seguimento, com melhora da tolerância ao exercício e não necessitou de internações. Por isso, achamos que o método pode ser considerado opção terapêutica em crianças com cardiomiopatia dilatada avançada, aguardando a indicação mais tardia de

  13. Infarto do miocárdio causado por lesão arterial coronariana após trauma torácico fechado Infarto de miocardio causado por lesión arterial coronaria post traumatismo torácico cerrado Myocardial infarction caused by coronary artery injury after a blunt chest trauma

    Directory of Open Access Journals (Sweden)

    Márcio Silva Miguel Lima

    2009-07-01

    Full Text Available Relatamos o caso de um indivíduo do sexo masculino de 29 anos de idade, vítima de um acidente de carro no qual sofreu trauma torácico fechado, evoluindo com insuficiência cardíaca congestiva. O paciente apresentava boa saúde previamente, sem sintomas de doença cardiovascular. Na avaliação inicial, o eletrocardiograma mostrou ondas Q nas derivações precordiais e o ecocardiograma mostrou disfunção ventricular esquerda importante. A angiografia coronária mostrou uma lesão na artéria coronária descendente anterior esquerda (ADE, com acinesia da parede anterior na ventriculografia com contraste. A tomografia computadorizada por emissão de fóton único (SPECT com Tálio-201 não mostrou viabilidade. O paciente foi mantido em tratamento clínico com boa evolução.Relatamos el caso de un individuo del sexo masculino, de 29 años de edad, víctima de accidente automovilístico en el cual sufrió traumatismo torácico cerrado, evolucionando con insuficiencia cardíaca congestiva. El paciente presentaba buena salud previamente, sin síntomas de enfermedad cardiovascular. En la evaluación inicial, el electrocardiograma mostró ondas Q en las derivaciones precordiales y el ecocardiograma mostró disfunción ventricular izquierda importante. La angiografía coronaria mostró una lesión en la arteria coronaria descendente anterior izquierda (ADI, con acinesia de la pared anterior en la ventriculografía de contraste. La tomografía computada por emisión de fotón único (SPECT con Talio-201 no mostró viabilidad. El paciente fue mantenido en tratamiento clínico con buena evolución.We report the case of a 29-year-old man, victim of a car accident, who suffered a severe blunt chest trauma, with evolving congestive heart failure. He had previously had a good overall health status, with no symptoms of cardiovascular disease. At the initial assessment, the electrocardiogram showed Q waves in the precordial leads and the echocardiogram

  14. Hipoglucemia inducida por carcinoma adrenal

    Directory of Open Access Journals (Sweden)

    Jimena Soutelo

    2013-08-01

    Full Text Available El carcinoma suprarrenal es una neoplasia maligna infrecuente y de mal pronóstico. La presentación clínica más común es originada por la producción hormonal excesiva, mientras que el desarrollo de hipoglucemia sintomática es excepcional. Presentamos el caso de una mujer de 37 años que ingresó al hospital por síntomas de hipoglucemias graves, hipertensión arterial, hipopotasemia y amenorrea secundaria. En el laboratorio se halló hipoglucemia con insulina inhibida y niveles de andrógenos en rango tumoral. La tomografía computarizada (TC de abdomen y pelvis mostró voluminosa formación heterogénea de aspecto sólido sin plano de clivaje con respecto al parénquima hepático e intenso realce con contraste. Luego de la extirpación de la masa retroperitoneal, evolucionó con valores de glucemia y potasemia normales, estabilizó la presión arterial y recuperó los ciclos menstruales.

  15. Electrocardiografo por computadora

    OpenAIRE

    Tinoco Hernandez, Rosanna; Paredes Bejarano, Margarita; Romero Chaglia, Norman; Yapur Auad, Miguel Eduardo

    2009-01-01

    El presente trabajo trata sobrees el diseño y la implementación de un graficador de señales cardiacas por computadora, para lo cual diseñamos un circuito electrónico capaz de recibir la senal analógica proveniente de la actividad electrica del corazón , amplificarla, y luego convertirla en una señal digital para ser procesada por software y finalmente ser graficada, siendo posible así observar la señal cardiaca en el monitor de un computador como un tren de pulsos. Cabe destacar que par...

  16. Indice por Materias

    Directory of Open Access Journals (Sweden)

    Montoya H Luz Marina

    1982-09-01

    Full Text Available Un índice es una lista de palabras o frases indicadores asociados que permite la ubicación de material al interior de un libro o una publicación, en este caso será por el nombre de la materia.

  17. Exeqüibilidade, segurança e acurácia do ecocardiograma sob estresse com dobutamina/ atropina para detecção de doença arterial coronariana em candidatos a transplante renal Feasibility, safety and accuracy of dobutamine/atropine stress echocardiography for the detection of coronary artery disease in renal transplant candidates

    Directory of Open Access Journals (Sweden)

    Pedro Antonio Muniz Ferreira

    2007-01-01

    Full Text Available OBJETIVO: Avaliar a exeqüibilidade, a segurança e a acurácia diagnóstica do ecocardiograma sob estresse (EEDA com dobutamina/atropina em candidatos a transplante renal. MÉTODOS: Pacientes candidatos a transplante renal com e sem nefropatia diabética realizaram EEDA e cineangiocoronariografia. Consideraram-se dois pontos de corte para doença arterial coronariana (DAC: > 50% e > 70% de obstrução de uma artéria epicárdica. RESULTADOS: Cento e quarenta e oito pacientes realizaram o EEDA e a angiografia coronariana. A média de idade foi de 52±9 anos, 69% eram do sexo masculino, 27% tinham nefropatia diabética, e 73%, HVE; 63% estavam assintomáticos, 36% e 22% apresentaram obstruções coronarianas > 50% e > 70%, respectivamente. A exeqüibilidade foi de 91% e houve 2,7% de complicações maiores. Obtiveram-se as seguintes médias de sensibilidade, especificidade e acurácia, considerando obstrução coronariana > 50%: 53% (IC:45-61, 87% (IC:81-93, e 75% (IC:63-83, respectivamente. Para obstrução >70%, 71% (IC:64-92, 85% (IC:79-91 e 81% (IC:75-87. A sensibilidade para diagnosticar doença uniarterial foi 41% (IC:19-63 e doença multiarterial, 78% (IC:64-92. CONCLUSÃO: O EEDA foi exeqüível e seguro; entretanto, foi ineficiente para rastreamento de DAC, considerando obstruções > 50%, mas pode ser útil para detecção de DAC em pacientes com obstruções > 70% e doença multiarterial.OBJECTIVE: To evaluate the feasibility, safety and accuracy of dobutamine/atropine stress echocardiography (DASE for the detection of coronary artery desease (CAD in renal transplant candidates. METHODS: Patients candidates to renal transplant were submitted consecutively to DASE and coronary angiography. The adopted angiographic criteria for CAD were an obstructive lesion of > 50% and > 70%. RESULTS: 148 patients underwent the DASE and the coronary angiography. Mean age was 52 ± 9 years, 69% of the patients were males; 27% had diabetic nephropathy

  18. Apendicitis por Paracoccidioides brasiliensis

    Directory of Open Access Journals (Sweden)

    Ana Beatriz MUÑOZ URRIBARRI

    2006-01-01

    Full Text Available La paracoccidioidomicosis es la micosis más prevalente en Sudamérica. La forma aguda afecta el sistema fagocítico mononuclear de niños y personas inmunocomprometidas. El compromiso gastrointestinal es frecuente y su patogenia implica diseminación hematógena y linfática. La linfadenomegalia abdominal causa obstrucción intestinal y abdomen agudo. En este artículo damos a conocer el caso de un niño con compromiso gastrointestinal por apendicitis. Este es el primer caso reportado de apendicitis por esta patología. (Rev Med Hered 2006;17:58-60.

  19. Normal Pressure Hydrocephalus (NPH)

    Science.gov (United States)

    ... local chapter Join our online community Normal Pressure Hydrocephalus (NPH) Normal pressure hydrocephalus is a brain disorder ... Symptoms Diagnosis Causes & risks Treatments About Normal Pressure Hydrocephalus Normal pressure hydrocephalus occurs when excess cerebrospinal fluid ...

  20. Apendicitis por Paracoccidioides brasiliensis.

    OpenAIRE

    MUÑOZ URRIBARRI, Ana Beatriz; CHAPARRO DAMMERT, Eduardo; FERRUFINO LLACH, Juan Carlos; VASQUEZ FLORES, Luciola

    2012-01-01

    La paracoccidioidomicosis es la micosis más prevalente en Sudamérica. La forma aguda afecta el sistema fagocítico mononuclear de niños y personas inmunocomprometidas. El compromiso gastrointestinal es frecuente y su patogenia implica diseminación hematógena y linfática. La linfadenomegalia abdominal causa obstrucción intestinal y abdomen agudo. En este artículo damos a conocer el caso de un niño con compromiso gastrointestinal por apendicitis. Este es el primer caso reportado de apendicitis p...

  1. Meningitis por Streptococcus suis

    OpenAIRE

    Geffner Sclarsky, D. E.; Moreno Muñoz, R.; Campillo Alpera, Mª.S.; Pardo Serrano, F.J.; Gómez Gómez, A.; Martínez-Lozano, Mª.D.

    2001-01-01

    La infección humana por Streptococcus suis (S. suis) es una zoonosis, con un riesgo ocupacional conocido y que suele presentarse como meningitis purulenta, que tiene baja mortalidad y frecuentes secuelas de hipoacusia y ataxia. Se han publicado menos de 150 casos humanos desde el informe original de hace 30 años. Hay una reconocida distribución geográfica viviendo la mayoría de los afectados en el norte de Europa y el sudeste Asiático. En España se han comunicado dos pacientes con enfermedad ...

  2. Por mil devaluados pesos

    Directory of Open Access Journals (Sweden)

    Annie Rodríguez Collázos

    2013-03-01

    Full Text Available El estudio de lo popular y lo urbano hasta ahora se ha centrado en el comportamiento y en algunas relaciones de los habitantes con su entorno. “Por mil devaluados pesos. Publicidad popular y urbana”, pretende explorar las formas de publicidad, dispersas en diferentes espacios populares y urbanos en Bogotá, identificando esquemas y formas características de sus propios códigos comunicativos; se centran en un objeto de estudio consistente en las estrategias publicitarias y los códigos comunicativos en los mensajes publicitarios populares en las subculturas de San Victorino, 7 de Agosto y Sanandresito de San José.

  3. Normalization: A Preprocessing Stage

    OpenAIRE

    Patro, S. Gopal Krishna; Sahu, Kishore Kumar

    2015-01-01

    As we know that the normalization is a pre-processing stage of any type problem statement. Especially normalization takes important role in the field of soft computing, cloud computing etc. for manipulation of data like scale down or scale up the range of data before it becomes used for further stage. There are so many normalization techniques are there namely Min-Max normalization, Z-score normalization and Decimal scaling normalization. So by referring these normalization techniques we are ...

  4. Trombose de prótese biológica mitral: importância do ecocardiograma transesofágico no diagnóstico e acompanhamento pós-tratamento Bioprosthetic mitral valve thrombosis: importance of transesophageal echocardiography in the diagnosis and follow-up after treatment

    Directory of Open Access Journals (Sweden)

    Adelino Parro Jr

    2004-04-01

    Full Text Available OBJETIVO: Descrever os achados clínicos e ecocardiográficos de trombose em prótese biológica mitral e o valor do ecocardiograma transesofágico (ETE no diagnóstico e monitoração da lise do trombo. MÉTODOS: Foram estudados ao ETE 111 pacientes com prótese biológica mitral, e incluídos 4 de 7 com suspeita de trombo nestas próteses (idade média = 60,2±10,2 anos; 2 homens. O diagnóstico pôde ser confirmado pela realização seriada do ETE e pela evolução clínica. Investigaram-se os aspectos morfológicos dos folhetos da prótese, e presença e característica das massas ecogênicas anexas. Foram obtidos o gradiente médio pela prótese e a área valvar. RESULTADOS: O diagnóstico de trombo em prótese biológica mitral foi realizado 48,7±55,2 meses após a cirurgia. Dois pacientes apresentaram acidente vascular encefálico isquêmico no pós-operatório imediato. O gradiente médio global estava elevado (11,4±3 mmHg e a área valvar reduzida (1,24±0,3cm². Ao ETE, em todos foram evidenciadas massas ecogênicas em face ventricular esquerda da prótese biológica mitral, sugestivas de trombo. No ETE seriado (136±233 dias, houve desaparecimento do trombo em dois casos e redução do trombo nos outros dois, após tratamento. O gradiente médio reduziu para 6,2±3 mmHg (p=0,004; IC 95%, e a área valvar aumentou para 2,07±0,4 (p=ns. CONCLUSÃO: O ETE mostrou-se útil na detecção de trombo em prótese biológica mitral e eficaz na monitoração do tratamento, em todos casos.OBJECTIVE: To report the clinical and echocardiographic findings of bioprosthetic mitral valve thrombosis and the value of transesophageal echocardiography (TEE in its diagnosis and monitoring of thrombolysis. METHODS: One hundred and eleven patients with mitral bioprostheses underwent TEE, and 4 out of 7 suspected of having a thrombus on these prostheses were included in the study (mean age = 60.2±10.2 years; 2 men. The diagnosis was confirmed with serial

  5. Tratamento do tromboembolismo pulmonar maciço por fragmentação percutânea do trombo Treatment of massive pulmonary embolism by percutaneous fragmentation of the thrombus

    Directory of Open Access Journals (Sweden)

    Marco Antonio Oliveira Barbosa

    2007-03-01

    Full Text Available OBJETIVOS: Avaliar a segurança e a eficácia da fragmentação percutânea do trombo (FPT no tromboembolismo pulmonar (TEP maciço em pacientes com contra-indicação à administração de trombolíticos. MÉTODOS: Entre julho de 1999 e agosto de 2005, 10 pacientes (7 homens, 3 mulheres, idade média de 57±18 anos com TEP maciço e contra-indicação à administração de trombolíticos foram submetidos a FPT. A saturação arterial de oxigênio (Sat.O2, índice de Walsh (IW, pressão arterial pulmonar média (PAP, pressão arterial sistêmica média (PAS e função ventricular direita (FVD ao ecocardiograma Doppler transtorácico foram avaliados pré e pós-procedimento. Foi realizada análise estatística por meio do teste de Wilcoxon pareado, sendo p significativo quando OBJECTIVES: To evaluate the safety and efficacy of percutaneous thrombus fragmentation (PTF for massive pulmonary embolism (PE in patients with contraindications to the administration of thrombolytics. METHODS: Between July 1999 and August 2005, 10 patients (7 males, 3 females, age 57±18 years with massive PE and contraindications to the administration of thrombolytics underwent PTF. A transthoracic doppler echocardiogram was used to evaluate arterial oxygen saturation (Sat O2, the Walsh index (WI, mean pulmonary artery pressure (PAP, mean systemic blood pressure (SBP and right ventricular function (RVF before and after the procedure. Statistical analysis was conducted using the paired Wilcoxon test, of which p was significant when < 0.05. RESULTS: After the PTF treatment there was an improvement in Sat. O2 [87.4 ± 1.3% vs 92.3 ± 3.1% (p < 0.001], WI [6.4 ± 1.07 vs 4.4 ± 1.42 (p = 0.003], PAP [31.8 ± 4.6 mmHg vs 25.5 ± 3.4 mmHg (p < 0.001] and SBP [73.9 ± 8.7 vs 85 ± 8.3 (p = 0.001. The ten patients had severe RVF before the percutaneous treatment; however, within 10 days after PTF, 8 presented normal or discrete function and 1 presented mitigated function. There

  6. Sepsis por shigella flexneri

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    César Cabrera C

    2005-04-01

    Full Text Available Se presenta un caso raro de sepsis por Shigella flexneri en una paciente de 45 años de edad quien estando hospitalizada para el estudio de un tumor cerebral, requirió el uso de manitol y dosis altas de corticoides; luego de ello presenta deposiciones líquidas con moco y sangre, desarrolla síndrome de respuesta inflamatoria sistémica, luego se aísla Shigella flexneri en el hemocultivo; recibió tratamiento antibiótico con ciprofloxacina. Se describen las características del caso y se comenta de acuerdo con la revisión de literatura.

  7. Portable exhausters POR-004 SKID B, POR-005 SKID C, POR-006 SKID D storage plan

    International Nuclear Information System (INIS)

    Nelson, O.D.; Keller, G.M.

    1997-01-01

    This document provides a storage plan for portable exhausters POR-004 SKID B, POR-005 SKID C, AND POR-006 SKID D. The exhausters will be stored until they are needed by the TWRS (Tank Waste Remediation Systems) Saltwell Pumping Program. The storage plan provides criteria for portable exhauster storage, periodic inspections during storage, and retrieval from storage

  8. Control Multivariable por Desacoplo

    Directory of Open Access Journals (Sweden)

    Fernando Morilla

    2013-01-01

    Full Text Available Resumen: La interacción entre variables es una característica inherente de los procesos multivariables, que dificulta su operación y el diseño de sus sistemas de control. Bajo el paradigma de Control por desacoplo se agrupan un conjunto de metodologías, que tradicionalmente han estado orientadas a eliminar o reducir la interacción, y que recientemente algunos investigadores han reorientado con objetivos de solucionar un problema tan complejo como es el control multivariable. Parte del material descrito en este artículo es bien conocido en el campo del control de procesos, pero la mayor parte de él son resultados de varios años de investigación de los autores en los que han primado la generalización del problema, la búsqueda de soluciones de fácil implementación y la combinación de bloques elementales de control PID. Esta conjunción de intereses provoca que no siempre se pueda conseguir un desacoplo perfecto, pero que sí se pueda conseguir una considerable reducción de la interacción en el nivel básico de la pirámide de control, en beneficio de otros sistemas de control que ocupan niveles jerárquicos superiores. El artículo resume todos los aspectos básicos del Control por desacoplo y su aplicación a dos procesos representativos: una planta experimental de cuatro tanques acoplados y un modelo 4×4 de un sistema experimental de calefacción, ventilación y aire acondicionado. Abstract: The interaction between variables is inherent in multivariable processes and this fact may complicate their operation and control system design. Under the paradigm of decoupling control, several methodologies that traditionally have been addressed to cancel or reduce the interactions are gathered. Recently, this approach has been reoriented by several researchers with the aim to solve such a complex problem as the multivariable control. Parts of the material in this work are well known in the process control field; however, most of them are

  9. Normalized modes at selected points without normalization

    Science.gov (United States)

    Kausel, Eduardo

    2018-04-01

    As every textbook on linear algebra demonstrates, the eigenvectors for the general eigenvalue problem | K - λM | = 0 involving two real, symmetric, positive definite matrices K , M satisfy some well-defined orthogonality conditions. Equally well-known is the fact that those eigenvectors can be normalized so that their modal mass μ =ϕT Mϕ is unity: it suffices to divide each unscaled mode by the square root of the modal mass. Thus, the normalization is the result of an explicit calculation applied to the modes after they were obtained by some means. However, we show herein that the normalized modes are not merely convenient forms of scaling, but that they are actually intrinsic properties of the pair of matrices K , M, that is, the matrices already "know" about normalization even before the modes have been obtained. This means that we can obtain individual components of the normalized modes directly from the eigenvalue problem, and without needing to obtain either all of the modes or for that matter, any one complete mode. These results are achieved by means of the residue theorem of operational calculus, a finding that is rather remarkable inasmuch as the residues themselves do not make use of any orthogonality conditions or normalization in the first place. It appears that this obscure property connecting the general eigenvalue problem of modal analysis with the residue theorem of operational calculus may have been overlooked up until now, but which has in turn interesting theoretical implications.Á

  10. "Ser diferente é normal?"/"Being different: is it normal?"

    Directory of Open Access Journals (Sweden)

    Viviane Veras

    2007-01-01

    Full Text Available A pergunta título deste trabalho retoma o slogan “Ser diferente é normal”, que é parte da campanha criada para uma organização não-governamental que atende portadores de Síndrome de Down. O objetivo é a inclusão social da pessoa com deficiência e o primeiro passo foi propor a inclusão de um grupo de diferentes no grupo dito normal. No vídeo de lançamento da campanha, o diferente, identificado como normal, é mostrado por meio de exemplos – um negro com cabelo black-power, um skin-head, um corpo tatuado, um corpo feminino halterofílico, uma família hippie, uma garota com síndrome de Down. A visão da adolescente dançando reduz, de certo modo, o efeito imaginário que vai além da síndrome, uma vez que apenas o corpo com seus olhinhos puxados se destacam, e não se interrogam questões cognitivas. Minha proposta é refletir sobre o estatuto paradoxal do exemplo, tal como é trabalhado nesse vídeo: se, por definição, um exemplo mostra de fato seu pertencimento a uma classe, pode-se concluir que é exatamente por ser exemplar que ele se encontra fora dela, no exato momento em que a exibe e define. The question in the title of this paper refers to the slogan "ser diferente é normal" ("It´s normal to be different", which is part of a campaign created for a NGO that supports people with Down syndrome. The objective of the campaign is to promote the social inclusion of individuals with Down syndrome, and the first step was to propose the inclusion of a group of "differents" in the so-called normal group. The film launching the campaign shows the different identified as normal by means of examples: a black man exhibiting blackpower haircut, a skin-head, a tattooed body, an over-athletic female body, a hippie family and a girl with Down syndrome. The vision of the dancing teenager lessens the imaginary effect that surpasses the syndrome, since only her body and her little oriental eyes stand out and no cognitive issues are

  11. Normal foot and ankle

    International Nuclear Information System (INIS)

    Weissman, S.D.

    1989-01-01

    The foot may be thought of as a bag of bones tied tightly together and functioning as a unit. The bones re expected to maintain their alignment without causing symptomatology to the patient. The author discusses a normal radiograph. The bones must have normal shape and normal alignment. The density of the soft tissues should be normal and there should be no fractures, tumors, or foreign bodies

  12. Evolución y letalidad por endocarditis infecciosa en pacientes atendidos en el Hospital Nacional Dos de Mayo

    Directory of Open Access Journals (Sweden)

    Evelyn Sánchez

    2006-06-01

    Full Text Available Objetivo: Evaluar la evolución y letalidad de los pacientes portadores de endocarditis infecciosa, así como la presencia de complicaciones y la influencia de estas sobre la mortalidad. Diseño: Estudio longitudinal no concurrente. Lugar: Servicio de cardiología del Hospital 2 de Mayo, hospital universitario. Pacientes: Pacientes con diagnóstico de endocarditis infecciosa. Intervenciones: Se revisó las historias clínicas de los pacientes con diagnóstico de endocarditis infecciosa atendidos entre junio de 1999 y junio de 2005. Se evaluó los criterios clínicos, de laboratorio y ecocardiográficos (criterios de Duke empleados en el diagnóstico. Para el análisis estadístico, se realizó el análisis descriptivo y comparativo con el empleo de las pruebas de Fisher y t de Student y la comparación de las curvas de Kaplan Meier, para evaluar la supervivencia a través de la prueba de rango logarítmico. Principales medidas de resultados: Evaluación de supervivencia: Complicaciones y mortalidad en pacientes en endocarditis infecciosa. Resultados: Se estudió 75 pacientes, la edad promedio fue 42,1±20,4 años, 66,7% del sexo masculino. El 93,3% tenía cardiopatía de base. La presentación clínica incluyó insuficiencia cardiaca congestiva (73,3%, encefalopatía (17,3% y fenómenos embólicos (50,6%. Se evaluó la evolución de los parámetros de laboratorio, evidenciándose deterioro de la función renal. El ecocardiograma evidenció presencia de vegetaciones en 97,3% y complicaciones, como rotura valvar (8%, abscesos valvares (4%. Durante la evolución, se sometió a cirugía a 14,7%. La letalidad general fue 14,7%, la cual estuvo influenciada por el número de complicaciones, en particular las complicaciones sépticas y renales, que impactaron de igual manera en la probabilidad de supervivencia de estos pacientes. Conclusiones: Se registró una letalidad general de 14,7%. La probabilidad de supervivencia se vio afectada

  13. Porøse materialer

    DEFF Research Database (Denmark)

    Hansen, Ernst Jan de Place

    2000-01-01

    Dette undervisningsnotat er en samling af noter, der refererer til den indledende del af kurset Materialmekanik og Porøse materailer på Insitut for Bærende Konstruktiner og Materialer (BKM).......Dette undervisningsnotat er en samling af noter, der refererer til den indledende del af kurset Materialmekanik og Porøse materailer på Insitut for Bærende Konstruktiner og Materialer (BKM)....

  14. Normal development of fetal hepatic haematopoiesis during the second trimester of gestation is upregulated by fibronectin expression in the stromal cells of the portal triads El desarrollo normal de la hematopoyesis hepática fetal durante el segundo trimestre de embarazo está regulado al alza por la expresión de fibronectina en las células del estroma de las tríadas portales

    Directory of Open Access Journals (Sweden)

    D. Tamiolakis

    2007-10-01

    -renovación, la proliferación y el crecimiento de las células madre hematopoyéticas, al interactuar con las células progenitoras hematopoyéticas. Se sabe que las glucoproteínas de la MEC producidas por las células del estroma desempeñan un papel crítico en la regulación del crecimiento y la diferenciación celulares. Se han documentado numerosos factores solubles y de membrana que regulan directamente la hematopoyesis, pero se sabe poco de la actividad de las células del estroma hepático y de la proteína (fibronectina de la matriz extracelular en el feto en relación con la hematopoyesis hepática. La unión de las células eritroides tardías a la fibronectina está bien tipificada y se cree que es crítica para las etapas terminales de la diferenciación eritroide. La intención de este artículo es determinar el papel de la fibronectina en la proliferación y diferenciación hematopoyética del hígado fetal en las distintas etapas del desarrollo. Material y método: examinamos y comparamos la expresión inmunohistoquímica de fibronectina en los campos portales del estroma hepático durante los trimestres primero, segundo y tercero del embarazo en relación con la aparición de células progenitoras hematopoyéticas CD34, progenitoras del estroma y endoteliales vasculares, respectivamente. Resultados: nuestros resultados mostraron una diferencia cuantitativa en cuanto a expresión de fibronectina en el estroma del tejido conjuntivo de los campos portales en el segundo trimestre de embarazo respecto al primero (p < 0,0001, prueba de la t y respecto al tercero (p < 0,0001, prueba de la t. Se hallaron también cambios similares en cuanto a la expresión de CD34 respecto al primer (p < 0,0001, prueba de la t y el tercer trimestres (p < 0,0001, prueba de la t, lo que indica la participación directa de la fibronectina en el mantenimiento de la actividad hematopoyética. Conclusiones: nuestros datos aportan pruebas de que un componente de la glucoproteina de la MEC, la

  15. Baby Poop: What's Normal?

    Science.gov (United States)

    ... I'm breast-feeding my newborn and her bowel movements are yellow and mushy. Is this normal for baby poop? Answers from Jay L. Hoecker, M.D. Yellow, mushy bowel movements are perfectly normal for breast-fed babies. Still, ...

  16. Visual Memories Bypass Normalization.

    Science.gov (United States)

    Bloem, Ilona M; Watanabe, Yurika L; Kibbe, Melissa M; Ling, Sam

    2018-05-01

    How distinct are visual memory representations from visual perception? Although evidence suggests that briefly remembered stimuli are represented within early visual cortices, the degree to which these memory traces resemble true visual representations remains something of a mystery. Here, we tested whether both visual memory and perception succumb to a seemingly ubiquitous neural computation: normalization. Observers were asked to remember the contrast of visual stimuli, which were pitted against each other to promote normalization either in perception or in visual memory. Our results revealed robust normalization between visual representations in perception, yet no signature of normalization occurring between working memory stores-neither between representations in memory nor between memory representations and visual inputs. These results provide unique insight into the nature of visual memory representations, illustrating that visual memory representations follow a different set of computational rules, bypassing normalization, a canonical visual computation.

  17. Making nuclear 'normal'

    International Nuclear Information System (INIS)

    Haehlen, Peter; Elmiger, Bruno

    2000-01-01

    The mechanics of the Swiss NPPs' 'come and see' programme 1995-1999 were illustrated in our contributions to all PIME workshops since 1996. Now, after four annual 'waves', all the country has been covered by the NPPs' invitation to dialogue. This makes PIME 2000 the right time to shed some light on one particular objective of this initiative: making nuclear 'normal'. The principal aim of the 'come and see' programme, namely to give the Swiss NPPs 'a voice of their own' by the end of the nuclear moratorium 1990-2000, has clearly been attained and was commented on during earlier PIMEs. It is, however, equally important that Swiss nuclear energy not only made progress in terms of public 'presence', but also in terms of being perceived as a normal part of industry, as a normal branch of the economy. The message that Swiss nuclear energy is nothing but a normal business involving normal people, was stressed by several components of the multi-prong campaign: - The speakers in the TV ads were real - 'normal' - visitors' guides and not actors; - The testimonials in the print ads were all real NPP visitors - 'normal' people - and not models; - The mailings inviting a very large number of associations to 'come and see' activated a typical channel of 'normal' Swiss social life; - Spending money on ads (a new activity for Swiss NPPs) appears to have resulted in being perceived by the media as a normal branch of the economy. Today we feel that the 'normality' message has well been received by the media. In the controversy dealing with antinuclear arguments brought forward by environmental organisations journalists nowadays as a rule give nuclear energy a voice - a normal right to be heard. As in a 'normal' controversy, the media again actively ask themselves questions about specific antinuclear claims, much more than before 1990 when the moratorium started. The result is that in many cases such arguments are discarded by journalists, because they are, e.g., found to be

  18. Hipotiroidismo inducido por Amiodarona: Reporte de caso

    Directory of Open Access Journals (Sweden)

    Jorge Luis Salinas Arce

    2012-03-01

    Full Text Available Se describe el caso de una mujer de 57 años de edad, con diagnóstico de síndrome de Wolf Parkinson White, en tratamiento con amiodarona 200 mg/día; que acudió por presentar palpitaciones, fatiga y aumento de sueño. Al examen físico no se encontró bocio, pero los reflejos osteotendinosos estaban prolongados. Los exámenes auxiliares mostraron TSH elevado, T4 libre disminuido y anticuerpos antiperoxidasa tiroidea negativos. Se suspendió la amiodarona y se inició levotiroxina. Después de dos meses; los niveles de TSH y T4 libre eran normales y la paciente no presentaba molestias. La amiodarona está asociada a diversos efectos adversos que pueden limitar su uso. Entre estos efectos adversos, se describe el hipotiroidismo inducido, que se caracteriza por TSH elevado, T4 libre disminuido y síntomas inespecíficos como fatiga, intolerancia al frío y piel seca. El tratamiento de elección es la levotiroxina.

  19. Las cosas por su nombre

    OpenAIRE

    Storani, Emilia

    2017-01-01

    El artículo propone indagar sobre los modos y diferentes formatos que se utilizan tanto en la escritura como en la lectura, para articular con las luchas por la identidad de género. La Ley de Identidad de Género ha sido un puntapié clave para pensarnos a nosotros mismos culturalmente y para pensar a los demás. Pero, ¿cómo mencionamos, escribimos y leemos las diferentes identidades? La escritura, también es un mundo transformador para quienes bregan por una sociedad más libre y sin prejuicios....

  20. Ptose palpebral causada por Paquidermoperiostose

    Directory of Open Access Journals (Sweden)

    Patricia Regina de Pinho Tavares

    2014-08-01

    Full Text Available A paquidermoperiostose é uma síndrome caracterizada por acometimento cutâneo e ósseo, e em alguns casos ocorre comprometimento palpebral leve. É uma síndrome rara, idiopática ou hereditária, com provável herança autossômica dominante de penetrância variável. Descreve-se o caso de um paciente com ptose grave por paquidermoperiostose elucidando sua fisiopatologia e conduta cirúrgica aplicada.

  1. Diverticulitis yeyunal perforada por enterolito.

    OpenAIRE

    Marenco De la Cuadra, Beatriz; Gomez-Rosado, Juan-Carlos; Capitan-Morales, Luis-Cristobal; Valdés Hernández, Javier; Reyes-lopera, N.J. De los

    2012-01-01

    La diverticulosis yeyunal es una enfermedad adquirida rara. Casi el 60-70% keeps asymptomátic or Con síntomas crónicos inespecíficos, aunque puede presentarse como un abdomen agudo. La perforación debida a enterolitos es una causa extremadamente rara do complicación, y puede producirse por la impactación de ésta contra la pared intestinal. Presentamos caso de un varón de 82 años que acude a urgencias por un dolor súbito abdominal, difuso, con irritación peritoneal, leucocitosis con neutro...

  2. Mortalidad intrahospitalaria por accidente cerebrovascular

    OpenAIRE

    Federico Rodríguez Lucci; Virginia Pujol Lereis; Sebastián Ameriso; Guillermo Povedano; María F. Díaz; Alejandro Hlavnicka; Néstor A. Wainsztein; Sebastián F. Ameriso

    2013-01-01

    La mortalidad global por accidente cerebrovascular (ACV) ha disminuido en las últimas tres décadas, probablemente debido a un mejor control de los factores de riesgo vascular. La mortalidad hospitalaria por ACV ha sido tradicionalmente estimada entre 6 y 14% en la mayoría de las series comunicadas. Sin embargo, los datos de ensayos clínicos recientes sugieren que esta cifra sería sustancialmente menor. Se revisaron datos de pacientes internados con diagnóstico de ACV del Banco de Datos de Str...

  3. Normal Pressure Hydrocephalus

    Science.gov (United States)

    ... improves the chance of a good recovery. Without treatment, symptoms may worsen and cause death. What research is being done? The NINDS conducts and supports research on neurological disorders, including normal pressure hydrocephalus. Research on disorders such ...

  4. Normality in Analytical Psychology

    Science.gov (United States)

    Myers, Steve

    2013-01-01

    Although C.G. Jung’s interest in normality wavered throughout his career, it was one of the areas he identified in later life as worthy of further research. He began his career using a definition of normality which would have been the target of Foucault’s criticism, had Foucault chosen to review Jung’s work. However, Jung then evolved his thinking to a standpoint that was more aligned to Foucault’s own. Thereafter, the post Jungian concept of normality has remained relatively undeveloped by comparison with psychoanalysis and mainstream psychology. Jung’s disjecta membra on the subject suggest that, in contemporary analytical psychology, too much focus is placed on the process of individuation to the neglect of applications that consider collective processes. Also, there is potential for useful research and development into the nature of conflict between individuals and societies, and how normal people typically develop in relation to the spectrum between individuation and collectivity. PMID:25379262

  5. Normal pressure hydrocephalus

    Science.gov (United States)

    Hydrocephalus - occult; Hydrocephalus - idiopathic; Hydrocephalus - adult; Hydrocephalus - communicating; Dementia - hydrocephalus; NPH ... Ferri FF. Normal pressure hydrocephalus. In: Ferri FF, ed. ... Elsevier; 2016:chap 648. Rosenberg GA. Brain edema and disorders ...

  6. Normal Functioning Family

    Science.gov (United States)

    ... Spread the Word Shop AAP Find a Pediatrician Family Life Medical Home Family Dynamics Adoption & Foster Care ... Español Text Size Email Print Share Normal Functioning Family Page Content Article Body Is there any way ...

  7. Normal growth and development

    Science.gov (United States)

    ... page: //medlineplus.gov/ency/article/002456.htm Normal growth and development To use the sharing features on this page, please enable JavaScript. A child's growth and development can be divided into four periods: ...

  8. DESAJUSTE EDUCATIVO POR REGIONES EN COLOMBIA: ¿COMPETENCIA POR SALARIOS O POR PUESTOS DE TRABAJO?

    Directory of Open Access Journals (Sweden)

    Maribel Castillo Caicedo

    2007-06-01

    Full Text Available Este trabajo aporta una perspectiva del fenómeno de la sobreeducación, entendida como un desajuste por exceso, entre el nivel educativo alcanzado por el individuo y el exigido por el puesto de trabajo en el cual se desempeña; esto se debe a que existe una demanda laboral estrecha de puestos de trabajo para personas calificadas en Colombia. Se analizan las contribuciones empíricas existentes y el debate sobre las mismas; se examinan las teorías que permiten explicar la existencia de un desajuste educativo y se realiza una revisión de la literatura internacional y nacional sobre el tema. Adicionalmente, se plantean una serie de hipótesis para desarrollar un esquema que permita determinar el comportamiento del individuo en el fenómeno de la sobreeducación.

  9. Consanguinidad por isonimia en Salta

    Directory of Open Access Journals (Sweden)

    Albeza, María V.

    2007-01-01

    Full Text Available Se estimó el coeficiente de parentesco por isonimia para localidades de la Puna, Valle Calchaquí y Valle de Lerma, a fin de evaluar diferentes factores evolutivos que podrían estar afectando la composición genética de la población. A partir de los apellidos de las parejas consignadas en fuentes primarias de información, se estimó la isonimia conyugal o marital, el coeficiente total Ft y sus componentes Fr (inbreeding azaroso y Fn (inbreeding no azaroso. De las localidades estudiadas, en la Puna se ha detectado sólo una pareja isónima en una de ellas, en el Valle Calchaquí, tres y ninguna en el Valle de Lerma. Tanto en el Valle Calchaquí como en el de Lerma, se han estimado valores negativos de Ft, y en la Puna se registran los valores más elevados. En las localidades estudiadas no se cumple el supuesto de transmisión patrilineal de apellidos por lo que los valores de Fr y por ende de Ft podrían estar subestimados. Es por ello que sería necesario contar con información desde otras vertientes metodológicas para corroborar, complementar y manejar cuidadosamente el análisis de los datos y las conclusiones que se obtienen.

  10. Celulitis por citomegalovirus Cytomegalovirus cellulitis

    Directory of Open Access Journals (Sweden)

    A. Ruiz Lascano

    2002-12-01

    Full Text Available Las lesiones cutáneas por citomegalovirus (CMV son infrecuentes y a menudo una manifestación tardía de una enfermedad sistémica, que generalmente anuncia un curso fatal. Comunicamos un caso de celulitis por CMV: una mujer de 70 años con trasplante renal efectuado 1 mes antes de la consulta, terapia inmunosupresora con ciclosporina A y metilprednisona. La paciente ingresó por fiebre, dolor e impotencia funcional en pierna derecha. Comprobamos la existencia de una placa de 8 por 4 cm eritematoedematosa. La tratamos con antibióticos sin mejoría, por lo que realizamos un estudio histopatológico de piel que mostró cambios citopáticos compatibles con infección por CMV. Los cultivos bacteriológicos y micológicos fueron negativos. La inmunohistoquímica específica para CMV y el estudio de reacción en cadena de la polimerasa (PCR de la biopsia de piel fueron positivas, al igual que la antigenemia. El tratamiento con ganciclovir produjo la mejoría del cuadro clínico. En la literatura revisada no hemos encontrado la celulitis como manifestación de enfermedad cutánea por CMV.Cutaneous lesions in CMV infection are rare, often a late manifestation of systemic infection, and usually herald a fatal course. A 70 year-old woman received a kidney transplantation one month before consulting and immunosuppressive therapy that included cyclosporine A and methylprednisone. She complained of fever, local pain in her right leg, and an erythematous and swelling plaque. She was treated with intravenous antibiotics without improvement. A skin biopsy was performed and the tissue obtained was sent for bacterial and fungal cultures as well as for histological examination. Cultures were negative. The biopsy showed CMV cytopathic changes. Immunoperoxidase staining was positive for CMV and polymerase chain reaction (PCR testing revealed CMV DNA. She was treated with ganciclovir with resolution of the lesion. CMV cellulitis is a rare cutaneous manifestation

  11. Smooth quantile normalization.

    Science.gov (United States)

    Hicks, Stephanie C; Okrah, Kwame; Paulson, Joseph N; Quackenbush, John; Irizarry, Rafael A; Bravo, Héctor Corrada

    2018-04-01

    Between-sample normalization is a critical step in genomic data analysis to remove systematic bias and unwanted technical variation in high-throughput data. Global normalization methods are based on the assumption that observed variability in global properties is due to technical reasons and are unrelated to the biology of interest. For example, some methods correct for differences in sequencing read counts by scaling features to have similar median values across samples, but these fail to reduce other forms of unwanted technical variation. Methods such as quantile normalization transform the statistical distributions across samples to be the same and assume global differences in the distribution are induced by only technical variation. However, it remains unclear how to proceed with normalization if these assumptions are violated, for example, if there are global differences in the statistical distributions between biological conditions or groups, and external information, such as negative or control features, is not available. Here, we introduce a generalization of quantile normalization, referred to as smooth quantile normalization (qsmooth), which is based on the assumption that the statistical distribution of each sample should be the same (or have the same distributional shape) within biological groups or conditions, but allowing that they may differ between groups. We illustrate the advantages of our method on several high-throughput datasets with global differences in distributions corresponding to different biological conditions. We also perform a Monte Carlo simulation study to illustrate the bias-variance tradeoff and root mean squared error of qsmooth compared to other global normalization methods. A software implementation is available from https://github.com/stephaniehicks/qsmooth.

  12. Manifestaciones cardiovasculares en pacientes tratados con hemodiálisis periódica por fístula arteriovenosa funcional

    Directory of Open Access Journals (Sweden)

    Ana S. Ayora Loaiza

    2016-06-01

    Conclusiones: No se encontró relación entre la localización de la fistula y los cambios en el sistema cardiovascular. El grupo de pacientes con fistula de más de cuatro años presentó mayores manifestaciones cardiovasculares y cambios significativos en el ecocardiograma.

  13. Monitoring the normal body

    DEFF Research Database (Denmark)

    Nissen, Nina Konstantin; Holm, Lotte; Baarts, Charlotte

    2015-01-01

    of practices for monitoring their bodies based on different kinds of calculations of weight and body size, observations of body shape, and measurements of bodily firmness. Biometric measurements are familiar to them as are health authorities' recommendations. Despite not belonging to an extreme BMI category...... provides us with knowledge about how to prevent future overweight or obesity. This paper investigates body size ideals and monitoring practices among normal-weight and moderately overweight people. Methods : The study is based on in-depth interviews combined with observations. 24 participants were...... recruited by strategic sampling based on self-reported BMI 18.5-29.9 kg/m2 and socio-demographic factors. Inductive analysis was conducted. Results : Normal-weight and moderately overweight people have clear ideals for their body size. Despite being normal weight or close to this, they construct a variety...

  14. Normal modified stable processes

    DEFF Research Database (Denmark)

    Barndorff-Nielsen, Ole Eiler; Shephard, N.

    2002-01-01

    Gaussian (NGIG) laws. The wider framework thus established provides, in particular, for added flexibility in the modelling of the dynamics of financial time series, of importance especially as regards OU based stochastic volatility models for equities. In the special case of the tempered stable OU process......This paper discusses two classes of distributions, and stochastic processes derived from them: modified stable (MS) laws and normal modified stable (NMS) laws. This extends corresponding results for the generalised inverse Gaussian (GIG) and generalised hyperbolic (GH) or normal generalised inverse...

  15. Normalization of satellite imagery

    Science.gov (United States)

    Kim, Hongsuk H.; Elman, Gregory C.

    1990-01-01

    Sets of Thematic Mapper (TM) imagery taken over the Washington, DC metropolitan area during the months of November, March and May were converted into a form of ground reflectance imagery. This conversion was accomplished by adjusting the incident sunlight and view angles and by applying a pixel-by-pixel correction for atmospheric effects. Seasonal color changes of the area can be better observed when such normalization is applied to space imagery taken in time series. In normalized imagery, the grey scale depicts variations in surface reflectance and tonal signature of multi-band color imagery can be directly interpreted for quantitative information of the target.

  16. The normal holonomy group

    International Nuclear Information System (INIS)

    Olmos, C.

    1990-05-01

    The restricted holonomy group of a Riemannian manifold is a compact Lie group and its representation on the tangent space is a product of irreducible representations and a trivial one. Each one of the non-trivial factors is either an orthogonal representation of a connected compact Lie group which acts transitively on the unit sphere or it is the isotropy representation of a single Riemannian symmetric space of rank ≥ 2. We prove that, all these properties are also true for the representation on the normal space of the restricted normal holonomy group of any submanifold of a space of constant curvature. 4 refs

  17. Esporotricosis diagnosticada por el laboratorio

    Directory of Open Access Journals (Sweden)

    Nelly Ordóñez

    1989-06-01

    Full Text Available De 1976 a 1989 se han diagnosticado 40 casos de esporotricosis en el laboratorio de Micología del Instituto Nacional de Salud. La enfermedad se presentó en pacientes entre 4 y 52 años y tuvo predilección por el sexo masculino: 35 de 40 (87,5%; las formas clínicas más frecuentes fueron la cutánea fija, 18 de 40 (45%, y la linfocutánea, 17 de 40 (42,5%, con localización mayor en miembros superiores, 18 de 40 (45%. El diagnóstico se estableció por el aislamiento del Sporothrix schenckii en 35 de 38 pacientes (92%; los otros dos pacientes se diagnosticaron empleando otras técnicas: inmunofluorescencia directa, intradermorreacción y aglutinación en tubo.

  18. Miasis cutanea por cordylobia anthropophaga

    Directory of Open Access Journals (Sweden)

    Alkorta Gurrutxaga Miriam

    2001-01-01

    Full Text Available El incremento progresivo en el número de personas que viajan a países tropicales ha hecho que las enfermedades importadas adquieran una relevancia cada vez mayor. Las miasis (o infestaciones por larvas de moscas cutáneas se encuentran entre este tipo de enfermedades siendo especialmente frecuentes en países tropicales. A propósito de la observación de un caso de miasis cutánea masiva por Cordylobia antropophaga, que ocurrió en una mujer de 34 años de edad al volver de un viaje a Senegal, se ha efectuado una revisión de los casos de miasis cutáneas forunculoides importadas publicados en España, así como de la biología, patología, tratamiento y prevención de la miasis humana por Cordylobia anthropophaga. El caso referido, se caracterizó por la infestación con un número inusualmente elevado de larvas, no sospechándose su etiología hasta la fase final de la enfermedad. La emergencia continuada de larvas (se recogieron 91 generó en la paciente un estado de ansiedad importante. Finalmente, la eliminación de las larvas provocó una rápida mejoría de la paciente. Aunque los casos de miasis cutánea no tienen la gravedad de otras enfermedades importadas, su conocimiento es necesario desde el punto de vista preventivo, diagnóstico y terapeútico. Es importante proceder a la identificación morfológica de las larvas diferenciándolas de otro tipo de miasis con implicaciones terapéuticas diferentes.

  19. Normality in Analytical Psychology

    Directory of Open Access Journals (Sweden)

    Steve Myers

    2013-11-01

    Full Text Available Although C.G. Jung’s interest in normality wavered throughout his career, it was one of the areas he identified in later life as worthy of further research. He began his career using a definition of normality which would have been the target of Foucault’s criticism, had Foucault chosen to review Jung’s work. However, Jung then evolved his thinking to a standpoint that was more aligned to Foucault’s own. Thereafter, the post Jungian concept of normality has remained relatively undeveloped by comparison with psychoanalysis and mainstream psychology. Jung’s disjecta membra on the subject suggest that, in contemporary analytical psychology, too much focus is placed on the process of individuation to the neglect of applications that consider collective processes. Also, there is potential for useful research and development into the nature of conflict between individuals and societies, and how normal people typically develop in relation to the spectrum between individuation and collectivity.

  20. Medically-enhanced normality

    DEFF Research Database (Denmark)

    Møldrup, Claus; Traulsen, Janine Morgall; Almarsdóttir, Anna Birna

    2003-01-01

    Objective: To consider public perspectives on the use of medicines for non-medical purposes, a usage called medically-enhanced normality (MEN). Method: Examples from the literature were combined with empirical data derived from two Danish research projects: a Delphi internet study and a Telebus...

  1. The Normal Fetal Pancreas.

    Science.gov (United States)

    Kivilevitch, Zvi; Achiron, Reuven; Perlman, Sharon; Gilboa, Yinon

    2017-10-01

    The aim of the study was to assess the sonographic feasibility of measuring the fetal pancreas and its normal development throughout pregnancy. We conducted a cross-sectional prospective study between 19 and 36 weeks' gestation. The study included singleton pregnancies with normal pregnancy follow-up. The pancreas circumference was measured. The first 90 cases were tested to assess feasibility. Two hundred ninety-seven fetuses of nondiabetic mothers were recruited during a 3-year period. The overall satisfactory visualization rate was 61.6%. The intraobserver and interobserver variability had high interclass correlation coefficients of of 0.964 and 0.967, respectively. A cubic polynomial regression described best the correlation of pancreas circumference with gestational age (r = 0.744; P pancreas circumference percentiles for each week of gestation were calculated. During the study period, we detected 2 cases with overgrowth syndrome and 1 case with an annular pancreas. In this study, we assessed the feasibility of sonography for measuring the fetal pancreas and established a normal reference range for the fetal pancreas circumference throughout pregnancy. This database can be helpful when investigating fetomaternal disorders that can involve its normal development. © 2017 by the American Institute of Ultrasound in Medicine.

  2. Normalização dos níveis séricos de ácido ascórbico por suplementação com suco de acerola (Malpighia glabra L. ou farmacológica em idosos institucionalizados Normalize the ascorbic acid serum levels the ascorbic acid of the for suplementation with acerola juice (Malpighia glabra L. and the pills, institutionalized elderly

    Directory of Open Access Journals (Sweden)

    Flávia Queiroga Aranha

    2004-09-01

    Full Text Available INTRODUÇÃO: Este estudo investigou o tempo necessário de suplementação com vitamina C, para a normalização dos níveis séricos em idosos com deficiência dessa vitamina e comparar o efeito da vitamina natural do suco de acerola (Malpighia glabra L. com o da vitamina na forma de fármaco. MÉTODOS: Foram estudados 37 idosos institucionalizados do município de João Pessoa, Paraíba, Brasil, divididos em 3 grupos: Grupo I - controle, Grupo II - suplementação com o suco de acerola e Grupo III - suplementação com fármaco. A metodologia empregada consistiu na dosagem sérica de ácido ascórbico e na verificação do consumo alimentar por inquérito dietético. Constatou-se um aumento significativo (pINTRODUCTION: Thirty-seven elderly citizens, deficient in vitamin C and institutionalized in the city of João Pessoa/Paraíba/Brazil, were studied with the objective of investigating the period of vitamin C supplementation necessary to normalize their blood serum levels. METHODS: The study also compared the efficiency of the natural vitamin, supplied in the form of West Indian cherry juice, (Malpighia glabra L. to that of the pharmaceutical product (tablets. The aged citizens were divided into 3 groups: Group I - control, Group II - supplemented with West Indian cherry juice, and Group III - supplemented with tablets. The methodology applied consisted of dosing the serum vitamin C levels and making a dietary enquiry to determine food consumption. RESULTS: A significant increase (p<0.05 in the mean serum ascorbic acid levels was shown after 10 (1.27±0.41mg/dL, 20 (1.69±0.45mg/dL and 30 (1.55±0.42mg/dL days of supplementation, as compared to the initial values (0.38±0.28mg/dL. On the 10th day of supplementation, those supplemented with West Indian cherry juice showed levels significantly higher (1.41±0.43mg/dL than those supplemented with tablets (1.03±0.25mg/dL. CONCLUSION: On the 20th day, the supplementation had satisfactorily

  3. Abdome agudo por obstrução por ileobiliar

    Directory of Open Access Journals (Sweden)

    Márcia Cristina de Alencastro

    Full Text Available OBJETIVO: descrever a experiência na abordagem dos doentes com abdome agudo por obstrução por IB, desde o diagnóstico até o tratamento definitivo. MÉTODOS: estudo retrospectivo incluindo todos os casos de IB tratados em um período de 23 anos. De acordo com a abordagem cirúrgica realizada, os pacientes foram divididos em dois grupos (1 enterolitotomia com colecistectomia no segundo momento; e (2 enterolitotomia, colecistectomia e abordagem da fístula. RESULTADOS: Doze pacientes foram incluídos, sendo 11 mulheres (91,6%, com média de idade de 72,2 anos. Todos os pacientes apresentavam doenças associadas, principalmente hipertensão arterial sistêmica (75%. Dois pacientes não apresentavam sintomas significativos de obstrução intestinal. O diagnóstico de IB foi realizado em seis pacientes (50% antes da laparotomia. O grupo 1 foi constituído de oito pacientes e o grupo 2 de quatro, e a morbidade foi, respectivamente, 33,3% e 8,3%. A mortalidade foi 16,6% (um paciente de cada grupo. CONCLUSÃO: O manejo do IB deve ser individualizado. O tratamento da obstrução mediante remoção do cálculo biliar por enterotomia proximal é a escolha inicial para o tratamento do IB. A colecistectomia e a correção da fístula bilioentérica podem ser realizadas juntamente com a remoção do cálculo, no entanto, em pacientes com comorbidades significativas, esses procedimentos devem ser realizados posteriormente.

  4. Endocarditis fatal con localización mitral producida por Erysipelothrix rhusiopathiae Fatal mitral valve endocarditis by Erysipelothrix rhusiopathiae

    Directory of Open Access Journals (Sweden)

    G.V. Vallespi

    2005-06-01

    Full Text Available Se describe un caso fatal de endocarditis en válvula mitral por Erysipelothrix rhusiopathiae, en un paciente varón de 45 años con antecedentes de etilismo crónico y sin contacto previo con animales. Presentaba un síndrome febril prolongado con poliartralgias, pérdida de peso y dolor en región lumbar y miembros inferiores. Los hemocultivos (2/2 fueron positivos a las 48 hs. de incubación y en el examen directo se observaron bacilos gram-positivos pleomórficos. En el subcultivo en agar sangre ovina al 5% desarrollaron colonias puntiformes con alfa hemólisis, catalasa y oxidasa negativas, PYR y LAP positivas y con producción de H2S en medio TSI. La cepa aislada fue identificada como E. rhusiopathiae de acuerdo a la metodología convencional y confirmada con API Coryne. El cuadro se asumió como una probable endocarditis demostrada mediante un ecocardiograma transtorácico. Se comenzó el tratamiento endovenoso con ampicilina y gentamicina. El paciente evolucionó favorablemente y se tornó afebril, sin embargo falleció a los 19 días de internación por edema agudo de pulmón. La prueba de sensibilidad por E-test demostró resistencia a vancomicina y gentamicina y sensibilidad a penicilina y cefotaxima. Es importante valorar los aislamientos de bacilos gram-positivos pleomórficos, catalasa y oxidasa negativos y realizar la prueba de producción de SH2 en el medio TSI. La resistencia a vancomicina ayuda a la identificación y permite establecer una correcta terapia antimicrobiana. Si bien se considera que las infecciones por E. rhusiopathiae son de carácter ocupacional, el contacto con cerdos u otros animales puede no ser evidente.A fatal case of Erysipelothrix rhusiopathiae mitral valve endocarditis is described in a 45 years old male, with a history of chronic alcohol abuse and without animals contact. He presented intermittent fever, polyarthralgia, weight loss, and low back pain. In blood cultures (2 bottles, gram

  5. Desajuste educativo por regiones en Colombia: ¿competencia por salarios o por puestos de trabajo?

    Directory of Open Access Journals (Sweden)

    Castillo Caicedo Maribel

    2007-08-01

    Full Text Available Este trabajo aporta una perspectiva del fenómeno de la sobreeducación,
    entendida como un desajuste por exceso, entre el nivel educativo alcanzado
    por el individuo y el exigido por el puesto de trabajo en el cual se
    desempeña; esto se debe a que existe una demanda laboral estrecha de
    puestos de trabajo para personas calificadas en Colombia. Se analizan las
    contribuciones empíricas existentes y el debate sobre las mismas; se
    examinan las teorías que permiten explicar la existencia de un desajuste
    educativo y se realiza una revisión de la literatura internacional y
    nacional sobre el tema. Adicionalmente, se plantean una serie de hipótesis
    para desarrollar un esquema que permita determinar el comportamiento
    del individuo en el fenómeno de la sobreeducación.

  6. Muerte materna por malaria grave por Plasmodium vivax

    Directory of Open Access Journals (Sweden)

    Nancy Arróspide

    Full Text Available Se presenta el caso de una mujer de 19 años con 29 semanas de gestación, procedente de Llumpe (Ancash con antecedentes de viajes a las localidades de Chanchamayo (Junín y Rinconada (Ancash. Ingresó al Hospital de Chacas (Ancash por presentar mal estado general, deshidratación, dificultad respiratoria, ictericia, sensación de alza térmica y dolor abdominal, tuvo reporte de: hemoparásitos 60% en frotis sanguíneo. Fue transferida al Hospital Ramos Guardia (Huaraz donde presentó mayor dificultad respiratoria, coluria, hematuria, disminución del débito urinario y reporte de Plasmodium (+, luego fue transferida al Hospital Cayetano Heredia (Lima donde ingresó a la Unidad de Cuidados Intensivos (UCI, con evolución a falla multiorgánica, óbito fetal y muerte materna. Se confirmó infección por Plasmodium vivax. Destacamos la importancia de mejorar nuestras capacidades de diagnóstico y manejo para brindar un tratamiento adecuado y oportuno.

  7. Idiopathic Normal Pressure Hydrocephalus

    Directory of Open Access Journals (Sweden)

    Basant R. Nassar BS

    2016-04-01

    Full Text Available Idiopathic normal pressure hydrocephalus (iNPH is a potentially reversible neurodegenerative disease commonly characterized by a triad of dementia, gait, and urinary disturbance. Advancements in diagnosis and treatment have aided in properly identifying and improving symptoms in patients. However, a large proportion of iNPH patients remain either undiagnosed or misdiagnosed. Using PubMed search engine of keywords “normal pressure hydrocephalus,” “diagnosis,” “shunt treatment,” “biomarkers,” “gait disturbances,” “cognitive function,” “neuropsychology,” “imaging,” and “pathogenesis,” articles were obtained for this review. The majority of the articles were retrieved from the past 10 years. The purpose of this review article is to aid general practitioners in further understanding current findings on the pathogenesis, diagnosis, and treatment of iNPH.

  8. Normal Weight Dyslipidemia

    DEFF Research Database (Denmark)

    Ipsen, David Hojland; Tveden-Nyborg, Pernille; Lykkesfeldt, Jens

    2016-01-01

    Objective: The liver coordinates lipid metabolism and may play a vital role in the development of dyslipidemia, even in the absence of obesity. Normal weight dyslipidemia (NWD) and patients with nonalcoholic fatty liver disease (NAFLD) who do not have obesity constitute a unique subset...... of individuals characterized by dyslipidemia and metabolic deterioration. This review examined the available literature on the role of the liver in dyslipidemia and the metabolic characteristics of patients with NAFLD who do not have obesity. Methods: PubMed was searched using the following keywords: nonobese......, dyslipidemia, NAFLD, NWD, liver, and metabolically obese/unhealthy normal weight. Additionally, article bibliographies were screened, and relevant citations were retrieved. Studies were excluded if they had not measured relevant biomarkers of dyslipidemia. Results: NWD and NAFLD without obesity share a similar...

  9. Ethics and "normal birth".

    Science.gov (United States)

    Lyerly, Anne Drapkin

    2012-12-01

    The concept of "normal birth" has been promoted as ideal by several international organizations, although debate about its meaning is ongoing. In this article, I examine the concept of normalcy to explore its ethical implications and raise a trio of concerns. First, in its emphasis on nonuse of technology as a goal, the concept of normalcy may marginalize women for whom medical intervention is necessary or beneficial. Second, in its emphasis on birth as a socially meaningful event, the mantra of normalcy may unintentionally avert attention to meaning in medically complicated births. Third, the emphasis on birth as a normal and healthy event may be a contributor to the long-standing tolerance for the dearth of evidence guiding the treatment of illness during pregnancy and the failure to responsibly and productively engage pregnant women in health research. Given these concerns, it is worth debating not just what "normal birth" means, but whether the term as an ideal earns its keep. © 2012, Copyright the Authors Journal compilation © 2012, Wiley Periodicals, Inc.

  10. Miasis ocular por Oestrus ovis

    Directory of Open Access Journals (Sweden)

    María Beltrán F

    2006-01-01

    Full Text Available Se presentan tres casos de miasis ocular (dos adultos y un niñoprocedentes de zonas ganaderas de la provincia de Huaura,departamento de Lima,que acudieron al Hospital Regional de Huacho por presentar el ojo rojo,fotofobia, edema palpebral y sensación de cuerpo extraño;se extrajeron larvas adheridas al canto interno del ojo,las cuales se recibieron en el Instituto Nacional de Salud y fueron identificadas como Oestrus ovis .

  11. La curiosidad por la naturaleza

    Directory of Open Access Journals (Sweden)

    José Vicente Rodríguez

    2016-07-01

    Full Text Available Esta actitud es un instrumento estratégico para estimular procesos de desarrollo realmente sostenibles, donde se aproveche la admiración que nos embarga al conocer y apreciar lo que nos rodea para responsablemente utilizar y conservar nuestros recursos naturales. Con esta reflexión deseo resaltar esa motivación de escudriñar lo desconocido, que fue también la virtud que propició el desarrollo de la personalidad de Francisco José de Caldas y Tenorio, uno de nuestros primeros y connotados sabios colombianos, y en cuyo honor se constituyó la revista de divulgación científica más importante del país, que en estos momentos cumple 76 años de existencia. Caldas tuvo curiosidad por todo lo que existía en su entorno; inicialmente en su natal Popayán, donde se maravilló por lo natural, lo que lo motivó y llevó más allá de su tierra a formar parte de la mayor empresa de exploración científica adelantada en ese entonces en territorio americano: la primera Expedición Botánica al nuevo Reino de Granada, de José Celestino Mutis.

  12. Mortalidad por meningitis por Pasteurella canis. Oportunidades de aprendizaje

    Directory of Open Access Journals (Sweden)

    Ana Rosa Ropero Vera

    2016-01-01

    Full Text Available La meningitis bacteriana es una enfermedad importante de distribución mundial, causa mayor y sustancial de mortalidad y morbilidad en países en desarrollo. La Organización Mundial de la Salud (OMS sostiene que la meningitis es una de las diez afecciones principales del ser humano y debe ser considerada como una emergencia infectológica; por eso es fundamental reconocer que esta enfermedad es causa de muerte en niños de todo el mundo, sin distinción de raza, nivel económico o sociocultural. Se realizó una investigación de caso en menor de 53 días de nacido, que cumplía con los criterios clínicos y de laboratorio compatible con meningitis bacteriana, con el propósito de analizar y fortalecer la toma de decisiones en salud pública por parte de la secretaría local de salud del municipio de Valledupar (Colombia. Entre los hallazgos se encontró antecedentes infecciosos en el menor, coloración de Gram y cultivo de LCR, en el que se identificó cocobacilos Gram negativos, que fueron aislados como agente causal Pasteurella canis. Este estudio pretende sensibilizar a los prestadores de salud para que cuenten con personal altamente capacitado para brindar tratamientos adecuados y prevenir complicaciones en la meningitis bacteriana en niños, y así disminuir la posibilidad de secuelas o muerte, tanto en pacientes con compromiso inmunológico o sin este.

  13. Mortalidad intrahospitalaria por accidente cerebrovascular

    Directory of Open Access Journals (Sweden)

    Federico Rodríguez Lucci

    2013-08-01

    Full Text Available La mortalidad global por accidente cerebrovascular (ACV ha disminuido en las últimas tres décadas, probablemente debido a un mejor control de los factores de riesgo vascular. La mortalidad hospitalaria por ACV ha sido tradicionalmente estimada entre 6 y 14% en la mayoría de las series comunicadas. Sin embargo, los datos de ensayos clínicos recientes sugieren que esta cifra sería sustancialmente menor. Se revisaron datos de pacientes internados con diagnóstico de ACV del Banco de Datos de Stroke de FLENI y los registros institucionales de mortalidad entre los años 2000 y 2010. Los subtipos de ACV isquémicos se clasificaron según criterios TOAST y los ACV hemorrágicos en hematomas intrapanquimatosos, hemorragias subaracnoideas aneurismáticas, malformaciones arteriovenosas y otros hematomas intraparenquimatosos. Se analizaron 1514 pacientes, 1079 (71% con ACV isquémico (grandes vasos 39%, cardioembólicos 27%, lacunares 9%, etiología indeterminada 14%, otras etiologías 11% y 435 (29% con ACV hemorrágico (intraparenquimatosos 27%, hemorragia subaracnoidea 30%, malformaciones arteriovenosas 25% y otros hematomas espontáneos 18%. Se registraron 38 muertes intrahospitalarias (17 ACV isquémicos y 21 ACV hemorrágicos, representando una mortalidad global del 2.5% (1.7% en ACV isquémicos y 4.8% en ACV hemorrágicos. No se registraron muertes asociadas al uso de fibrinolíticos endovenosos. La mortalidad intrahospitalaria en pacientes con ACV isquémico y hemorrágico en nuestro centro fue baja. El manejo en un centro dedicado a las enfermedades neurológicas y el enfoque multidisciplinario por personal médico y no médico entrenado en el cuidado de la enfermedad cerebrovascular podrían explicar, al menos en parte, estos resultados.

  14. Herida precordial por arma blanca

    OpenAIRE

    Marcelo F. Jiménez; Nuria Novoa; José Luis Aranda; Gonzalo Varela

    2005-01-01

    Varón de 42 años con esquizofrenia paranoide. Intento de suicidio con tres autolesiones por arma blanca (Fig. 1). Fue traído al hospital en estado consciente, taquicárdico, taquipneico y con tensión arterial (TA) de 140/90 mmHg. Fue trasladado al quirófano, donde se practicó una toracotomía axilar izquierda sin extraer el arma. Durante la intervención se apreciaron tres heridas incisas, dos no penetrantes, hemotórax de 150 ml, herida pericárdica de 4 cm, sin lesiones cardíacas. La hoja del ar...

  15. Theory of normal metals

    International Nuclear Information System (INIS)

    Mahan, G.D.

    1992-01-01

    The organizers requested that I give eight lectures on the theory of normal metals, ''with an eye on superconductivity.'' My job was to cover the general properties of metals. The topics were selected according to what the students would need to known for the following lectures on superconductivity. My role was to prepare the ground work for the later lectures. The problem is that there is not yet a widely accepted theory for the mechanism which pairs the electrons. Many mechanisms have been proposed, with those of phonons and spin fluctuations having the most followers. So I tried to discuss both topics. I also introduced the tight-binding model for metals, which forms the basis for most of the work on the cuprate superconductors

  16. Miotoxicidade por organofosforados Organophosphate myotoxicity

    Directory of Open Access Journals (Sweden)

    Maria J. Cavaliere

    1996-06-01

    Full Text Available Os organofosforados são um grupo de compostos químicos amplamente utilizados em agropecuária como inseticidas, ocasionando intoxicações acidentais em animais e humanos, e mesmo sendo utilizados em tentativas de suicídio. A toxicidade desses produtos decorre sobretudo de insuficiência cárdio-respiratória por compromentimento do sistema nervoso autônomo. Sabe-se que alguns destes compostos induzem em animais de experimentação e em humanos, uma miopatia caracterizada por degeneração de células musculares, comprometendo sobretudo a musculatura respiratória. Baseado no fato de que este comprometimento contribui para a piora da função respiratória, propõe-se um protocolo de avaliação rotineira de miotoxicidade por compostos organofosforados, através de uma bateria mínima e suficiente de colorações e reações histoquímicas para quantificação da necrose muscular. Utilizaram-se como modelo experimental, grupos de ratos albinos (Wistar intoxicados com o organofosforado paraoxon, com e sem antídotos (atropina ou pralidoxima. Verificou-se nos grupos tratados com paraoxon e paraoxon mais atropina, necrose de fibras musculares no diafragma, que atingia em determinadas áreas até 15% das fibras. No grupo tratado com paraoxon mais pralidoxima, a necrose foi mínima, evidenciando o papel mioprotetor deste último antídoto.Organophosphates comprise a group of chemical compounds extensively used in farming as insecticides, which cause accidental poisoning in animals and men and are also used in suicide attempts. The toxicity of these compounds is due especially to the cardiac and respiratory impairment in consequence of autonomic nervous system disorders. However, it is known that some of these products induce a myopathy in experimental animals and humans. This myopathy is characterized by muscle cell degeneration, involving above all the respiratory muscles. Based on the fact that this involvement certainly enhances the

  17. Herida precordial por arma blanca

    Directory of Open Access Journals (Sweden)

    Marcelo F. Jiménez

    2005-04-01

    Full Text Available Varón de 42 años con esquizofrenia paranoide. Intento de suicidio con tres autolesiones por arma blanca (Fig. 1. Fue traído al hospital en estado consciente, taquicárdico, taquipneico y con tensión arterial (TA de 140/90 mmHg. Fue trasladado al quirófano, donde se practicó una toracotomía axilar izquierda sin extraer el arma. Durante la intervención se apreciaron tres heridas incisas, dos no penetrantes, hemotórax de 150 ml, herida pericárdica de 4 cm, sin lesiones cardíacas. La hoja del arma blanca penetraba a través del diafragma produciendo una herida incisa en el lóbulo hepático izquierdo (Fig. 2. Se extrajo el arma y se suturó la laceración hepática. El paciente fue trasladado el cuarto día a la Unidad de Psiquiatría.

  18. por láser

    Directory of Open Access Journals (Sweden)

    Mayra Garcimuño

    2013-01-01

    Full Text Available En el presente trabajo, la técnica Espectroscopia de plasmas producidos por láser (Laser-induced breakdown spectroscopy –LIBS– se aplicó a la determinación cuan- titativa de Na en agua natural dulce, de interés en agricultura para el estudio de la alcalinidad de aguas de regadío. Para efectuar el análisis, se prepararon soluciones con concentraciones conocidas del analito, se mezclaron con óxido de calcio y se compactaron en pastillas sólidas. Los plasmas se produjeron en aire a presión atmos- férica utilizando un láser pulsado Nd:YAG. Se construyó una curva de calibración y se calculó el límite de detección. Se analizaron muestras de agua natural y los resultados se compararon con los obtenidos mediante espectroscopia de absorción atómica. Se demostró la factibilidad del método para la determinación de Na en agua natural dulce.

  19. Osteomalacia inducida por tumor: hemangiopericitoma rinosinusal

    Directory of Open Access Journals (Sweden)

    Enriqueta M. Serafini

    2013-02-01

    Full Text Available La osteomalacia inducida por tumor es una rara enfermedad del metabolismo óseo caracterizada por el aumento en la excreción de fosfato a nivel renal seguido de hipofosfatemia. Es causada por agentes fosfatúricos producidos por determinados tumores. La resección total del tumor resulta en la completa reversión de las anormalidades bioquímicas, la desaparición de las manifestaciones clínicas y los hallazgos en los estudios por imágenes. Presentamos el caso de un varón de 61 años con cuadro clínico y laboratorio compatibles con osteomalacia oncogénica inducida por tumor mesenquimático de localización rinosinusal. En nuestro caso el diagnóstico histológico correspondió a una neoplasia de tipo vascular: hemangiopericitoma.

  20. Casipoemas por Navidad : (1969-2010)

    OpenAIRE

    Sena Medina, Guillermo

    2011-01-01

    PRESENTACIÓN AL AIRE DE LA POESÍA RELIGIOSA Y NAVIDEÑA DE GUILLERMO SENA MEDINA Constituye un gran honor hacer la presentación de Guillermo Sena Medina por un doble motivo; por la larga y sincera amistad que nos une desde hace muchos años al socaire de nuestra común afición por la Historia, como cronistas oficiales de nuestros municipios; y, sobre todo y particularmente, por su rica y profunda personalidad como hombre de letras, nacida de su aún más rica y profunda personalidad humana. A...

  1. Insuficiencia renal aguda inducida por mordedura de serpiente Bothrops

    Directory of Open Access Journals (Sweden)

    Gustavo A. Aroca Martínez

    2014-01-01

    Full Text Available Mujer de 58 años de edad, remitida a urgencias por presentar cuadro clínico de insuficiencia renal aguda (IRA secundaria a mordedura de serpiente (Bothrops Atrox. Ingresa hipotensa con elevación de azoados e hiperkalemia, ecografía renal dentro de parámetros normales. Se maneja terapia dialítica con lo cual presenta mejoría clínica. En este reporte se detallan aspectos del diagnóstico, manejo clínico y posibles mecanismos fisiopatológicos que explican el daño renal.

  2. Short proofs of strong normalization

    OpenAIRE

    Wojdyga, Aleksander

    2008-01-01

    This paper presents simple, syntactic strong normalization proofs for the simply-typed lambda-calculus and the polymorphic lambda-calculus (system F) with the full set of logical connectives, and all the permutative reductions. The normalization proofs use translations of terms and types to systems, for which strong normalization property is known.

  3. Hematoquecia letal por angiostrongilosis abdominal

    Directory of Open Access Journals (Sweden)

    Gerzain Rodríguez

    2000-06-01

    Full Text Available Una niña indigena de 4 años de edad, procedente de Carurú, Vaupés, un municipio semiselvático de 2.000 habitantes, presentó hematoquecia repetida con sincope y muerte 4 días después, a pesar de recibir transfusiones sanguíneas. El estudio postmortem descubrió dos masas de 3-4 cm de diámetro en el ileon distal que, al microscopio, correspondieron a inflamación severa de toda la pared intestinal, rica en eosinofilos y en granulomas con células gigantes que circunscribian y fagocitaban huevos y larvas de Angiostrongylus costaricensis, helminto situado también dentro de las arterias de la submucosa, vasos que presentaban engrosamiento de la intima y focos con inflamación granulomatosa con eosinófilos. La niña no presentó leucocitosis ni eosinofilia. Este es el segundo caso de angiostrongilosis de esta región. El primero fue el de una mujer indigena de 34 años también con hematoquecia anemizante. La angiostrongilosis abdominal se diagnosticó por primera vez en Colombia en 1979, en un niño de 5 años, de Dagua, Valle. La niña aquí presentada es el sexto paciente con esta entidad en Colombia. La hematoquecia como manifestación predominante de la angiostrongilosis es extraordinaria para una enfermedad parasitaria; se ha registrado solamente en tres ocasiones anteriores. La abundancia de cristales de Charcot-Leyden, que se tiñen muy bien con la coloración de Ziehl-Neelsen o de Fite-Faraco, en los infiltrados de la pared intestinal. sugiere que su búsqueda en las heces puede ser una ayuda en el diagnóstico de casos sospechosos. pues, los huevos y las larvas no se eliminan en las heces y el diagnóstico definitivo de la angiostrongilosis es histopatológico. Revisamos las caracteristicas clinicas, parasitológicas e histopatológicas de esta parasitosis que será más prevalente en Colombia a medida que los médicos. especialmente los patólogos, la conozcan mejor.

  4. Encefalopatía por priones

    Directory of Open Access Journals (Sweden)

    Carlos Colegial

    1999-01-01

    Full Text Available Las encefalopatías espongiformes por priones son enfermedades neurodegenerativas que pueden ser esporádicas o transmisibles, ya sea por mecanismos infecciosos o hereditarios. Su investigación ha planteado enormes retos y en el recorrido histórico en busca de su causa dos médicos han recibido el premio Nobel de Medicina: Carleton Gajdusek, por sus trabajos en Nueva Guinea donde describió la transmisión infecciosa por ritos canibalísticos, que llevó a estudios de transmisión experimental en chimpancés y a su teoría de los "virus lentos" (por el largo período de incubación de la enfermedad.

  5. Mixoma ventricular izquierdo

    Directory of Open Access Journals (Sweden)

    Camilo Alvarado-Castro

    2017-05-01

    Conclusión: Las neoplasias cardiacas son infrecuentes siendo el mixoma, el tumor benigno más común del corazón. El diagnóstico puede ser sugerido por los síntomas, aunque es usual encontrar un examen físico normal. Se diagnóstica con el ecocardiograma transtorácico, la tomografía axial computarizada y la resonancia nuclear magnética. El tratamiento es quirúrgico, siendo seguro, efectivo y considerado curativo en la mayoría de las resecciones, con una tasa de supervivencia a 5 años del 83%.

  6. Portable exhauster POR-007/Skid E and POR-008/Skid F storage plan

    International Nuclear Information System (INIS)

    Nelson, O.D.

    1998-01-01

    This document provides storage requirements for 1,000 CFM portable exhausters POR-O07/Skid E and POR-008/Skid F. These requirements are presented in three parts: preparation for storage, storage maintenance and testing, and retrieval from storage. The exhauster component identification numbers listed in this document contain the prefix POR-007 or POR-008 depending on which exhauster is being used

  7. Bicervical normal uterus with normal vagina | Okeke | Annals of ...

    African Journals Online (AJOL)

    To the best of our knowledge, only few cases of bicervical normal uterus with normal vagina exist in the literature; one of the cases had an anterior‑posterior disposition. This form of uterine abnormality is not explicable by the existing classical theory of mullerian anomalies and suggests that a complex interplay of events ...

  8. Group normalization for genomic data.

    Science.gov (United States)

    Ghandi, Mahmoud; Beer, Michael A

    2012-01-01

    Data normalization is a crucial preliminary step in analyzing genomic datasets. The goal of normalization is to remove global variation to make readings across different experiments comparable. In addition, most genomic loci have non-uniform sensitivity to any given assay because of variation in local sequence properties. In microarray experiments, this non-uniform sensitivity is due to different DNA hybridization and cross-hybridization efficiencies, known as the probe effect. In this paper we introduce a new scheme, called Group Normalization (GN), to remove both global and local biases in one integrated step, whereby we determine the normalized probe signal by finding a set of reference probes with similar responses. Compared to conventional normalization methods such as Quantile normalization and physically motivated probe effect models, our proposed method is general in the sense that it does not require the assumption that the underlying signal distribution be identical for the treatment and control, and is flexible enough to correct for nonlinear and higher order probe effects. The Group Normalization algorithm is computationally efficient and easy to implement. We also describe a variant of the Group Normalization algorithm, called Cross Normalization, which efficiently amplifies biologically relevant differences between any two genomic datasets.

  9. Group normalization for genomic data.

    Directory of Open Access Journals (Sweden)

    Mahmoud Ghandi

    Full Text Available Data normalization is a crucial preliminary step in analyzing genomic datasets. The goal of normalization is to remove global variation to make readings across different experiments comparable. In addition, most genomic loci have non-uniform sensitivity to any given assay because of variation in local sequence properties. In microarray experiments, this non-uniform sensitivity is due to different DNA hybridization and cross-hybridization efficiencies, known as the probe effect. In this paper we introduce a new scheme, called Group Normalization (GN, to remove both global and local biases in one integrated step, whereby we determine the normalized probe signal by finding a set of reference probes with similar responses. Compared to conventional normalization methods such as Quantile normalization and physically motivated probe effect models, our proposed method is general in the sense that it does not require the assumption that the underlying signal distribution be identical for the treatment and control, and is flexible enough to correct for nonlinear and higher order probe effects. The Group Normalization algorithm is computationally efficient and easy to implement. We also describe a variant of the Group Normalization algorithm, called Cross Normalization, which efficiently amplifies biologically relevant differences between any two genomic datasets.

  10. Verdad por definición

    OpenAIRE

    Garrido Garrido, Julián

    1997-01-01

    Not available.La verdad por definición es un tipo peculiar de verdad científica, distinguible de las verdades lógicas, matemáticas y empíricas. La definición, por su parte, designa diversos procedimientos de asignación de significado, cuyas diferencias exigen una adjetivación cuidadosa: definiciones ostensivas y operacionales, definiciones de diccionario y definiciones teóricas. Pero sólo las del último tipo son verdaderas por definición. En el presente artículo se precisa el concepto formal ...

  11. Síndrome de Munchausen por mandato

    OpenAIRE

    Esteban, Miguel A.; Pérez, Miriam R.; Bracco, Anahí

    2006-01-01

    El Síndrome de Munchausen por mandato, "un trastorno ficticio, por el cual la enfermedad del niño es inducida, promovida o provocada por la persona más próxima a él, generalmente su madre", es todavía mal conocido y su génesis imperfectamente comprendida. Esta comunicación está destinada a esclarecer al pediatra esta patología, con elevada morbilidad y secuelas, como así también de altísima mo...

  12. Comparison of spectrum normalization techniques for univariate ...

    Indian Academy of Sciences (India)

    Laser-induced breakdown spectroscopy; univariate study; normalization models; stainless steel; standard error of prediction. Abstract. Analytical performance of six different spectrum normalization techniques, namelyinternal normalization, normalization with total light, normalization with background along with their ...

  13. La pintura vista por un pintor joven

    Directory of Open Access Journals (Sweden)

    Fuentes Pozo, Pedro

    2000-01-01

    Full Text Available Not available

    El pintor se define a lo largo del tiempo como un artista en mutación influenciado por la sociedad de su momento y por su propio mundo interior Esto ha contribuido a la creación de distintos estilos pictóricos y a una evolución que conlleva la despreocupación por el aspecto formal en aras de una introspección al mundo interior En el cambio constante se refleja la búsqueda del artista que valida la intemporalidad del arte. Así, el verdadero artista sobrevive al aplauso o rechazo de la crítica, convirtiéndose en un verdadero hombre renancentista preocupado por el hallazgo del conocimiento universal.

  14. 14 Nobel, preocupados por el CERN

    CERN Multimedia

    Rivera, A

    2003-01-01

    "E l presidente del Consejo del CERN (Laboratorio Europeo de Fisica de Particulas, junto a Ginebra), Maurice Bourquin, ha recibido una carta firmada por un grupo de cientificos muy especiales: 14 premios Nobel de Fisica" (1 page).

  15. Normal matter storage of antiprotons

    International Nuclear Information System (INIS)

    Campbell, L.J.

    1987-01-01

    Various simple issues connected with the possible storage of anti p in relative proximity to normal matter are discussed. Although equilibrium storage looks to be impossible, condensed matter systems are sufficiently rich and controllable that nonequilibrium storage is well worth pursuing. Experiments to elucidate the anti p interactions with normal matter are suggested. 32 refs

  16. The N'ormal Distribution

    Indian Academy of Sciences (India)

    An optimal way of choosing sample size in an opinion poll is indicated using the normal distribution. Introduction. In this article, the ubiquitous normal distribution is intro- duced as a convenient approximation for computing bino- mial probabilities for large values of n. Stirling's formula. • and DeMoivre-Laplace theorem ...

  17. Micetoma por Nocardia brasiliensis: reporte de caso

    Directory of Open Access Journals (Sweden)

    Miriam Guevara R

    2003-07-01

    Full Text Available Se presenta el caso de un paciente peruano, agricultor, con una infección cutánea de origen traumático causada por Nocardia brasiliensis, que evolucionó hacia la amputación del miembro inferior afectado. El diagnóstico se realizó por examen directo y cultivo del espécimen.

  18. Tatuaje por amalgama. Reporte de un caso

    Directory of Open Access Journals (Sweden)

    Luis Fang Mercado

    2012-01-01

    Full Text Available El tatuaje por amalgama se origina por el depósito en el tejido conectivo subepitelial de fragmentos de amalgama resultado de procedimientos iatrogénicos por parte del operador. La profundidad a la que se encuentren albergados los residuos de este material influye en la presentación clínica de las lesiones. Radiográficamente se pueden identificar los fragmentos mientras tengan diámetros razonables; histológicamente se pueden observar las partículas de amalgama como gránulos oscuros, sólidos e irregulares dispuesto entre los haces de colágeno y vasos sanguíneos. Este artículo refiere el caso clínico de un paciente que presentó pigmentación por amalgama en mucosa vestibular, originada por una porción de amalgama usada como material obturador en una apicectomía del 11 realizada con anterioridad. Teniendo en cuenta las consideraciones clínicas y radiográficas se optó por realizar una segunda apicectomía con obturación retrógrada con MTA del 11. Durante el procedimiento quirúrgico se cureteó y adelgazó la cara interna del colgajo mucoperióstico para tratar de disminuir el grado de pigmentación.

  19. Las Escuelas Normales de Varones del Siglo XIX en Colombia

    Directory of Open Access Journals (Sweden)

    Miryam Báez Osorio

    2004-01-01

    Full Text Available En la década de los años setenta del siglo XIX, se fundaron doce escuelas normales de institutores en Colombia, así: una de carácter central, encargada de formar a los maestros para las demás escuelas normales del país, diez de carácter nacional en cada una de las capitales de los Estados Federados e incluso una más para el Estado de Bolívar con sede en Barranquilla. Además una escuela Normal por cuenta del Estado de Cundinamarca. La mayoría de las escuelas normales fueron organizadas y dirigidas por pedagogos alemanes que contrató el Estado colombiano. Todas las Instituciones asumieron la misión de preparar a los maestros, mediante el método pestalozziano que luego se encargaron de la educación primaria como política de popularización de la educación de los gobiernos radicales.

  20. Evolution of NADPH-cytochrome P450 oxidoreductases (POR) in Apiales - POR 1 is missing

    DEFF Research Database (Denmark)

    Andersen, Trine Bundgaard; Hansen, Niels Bjørn; Laursen, Tomas

    2016-01-01

    The NADPH-dependent cytochrome P450 oxidoreductase (POR) is the obligate electron donor to eukaryotic microsomal cytochromes P450 enzymes. The number of PORs within plant species is limited to one to four isoforms, with the most common being two PORs per plant. These enzymes provide electrons to ...... (available from the SRA at NCBI). All three genes were shown to be functional upon reconstitution into nanodiscs, confirming that none of the isoforms are pseudogenes....

  1. Complete Normal Ordering 1: Foundations

    CERN Document Server

    Ellis, John; Skliros, Dimitri P.

    2016-01-01

    We introduce a new prescription for quantising scalar field theories perturbatively around a true minimum of the full quantum effective action, which is to `complete normal order' the bare action of interest. When the true vacuum of the theory is located at zero field value, the key property of this prescription is the automatic cancellation, to any finite order in perturbation theory, of all tadpole and, more generally, all `cephalopod' Feynman diagrams. The latter are connected diagrams that can be disconnected into two pieces by cutting one internal vertex, with either one or both pieces free from external lines. In addition, this procedure of `complete normal ordering' (which is an extension of the standard field theory definition of normal ordering) reduces by a substantial factor the number of Feynman diagrams to be calculated at any given loop order. We illustrate explicitly the complete normal ordering procedure and the cancellation of cephalopod diagrams in scalar field theories with non-derivative i...

  2. The normal and pathological language

    OpenAIRE

    Espejo, Luis D.

    2014-01-01

    The extraordinary development of normal and pathological psychology has achieved in recent decades, thanks to the dual method of objective observation and oral survey enabled the researcher spirit of neuro-psychiatrist penetrate the intimate mechanism of the nervous system whose supreme manifestation is thought. It is normal psychology explaining the complicated game of perceptions: their methods of transmission, their centers of projection, its transformations and its synthesis to construct ...

  3. Is normal science good science?

    Directory of Open Access Journals (Sweden)

    Adrianna Kępińska

    2015-09-01

    Full Text Available “Normal science” is a concept introduced by Thomas Kuhn in The Structure of Scientific Revolutions (1962. In Kuhn’s view, normal science means “puzzle solving”, solving problems within the paradigm—framework most successful in solving current major scientific problems—rather than producing major novelties. This paper examines Kuhnian and Popperian accounts of normal science and their criticisms to assess if normal science is good. The advantage of normal science according to Kuhn was “psychological”: subjective satisfaction from successful “puzzle solving”. Popper argues for an “intellectual” science, one that consistently refutes conjectures (hypotheses and offers new ideas rather than focus on personal advantages. His account is criticized as too impersonal and idealistic. Feyerabend’s perspective seems more balanced; he argues for a community that would introduce new ideas, defend old ones, and enable scientists to develop in line with their subjective preferences. The paper concludes that normal science has no one clear-cut set of criteria encompassing its meaning and enabling clear assessment.

  4. nth roots of normal contractions

    International Nuclear Information System (INIS)

    Duggal, B.P.

    1992-07-01

    Given a complex separable Hilbert space H and a contraction A on H such that A n , n≥2 some integer, is normal it is shown that if the defect operator D A = (1 - A * A) 1/2 is of the Hilbert-Schmidt class, then A is similar to a normal contraction, either A or A 2 is normal, and if A 2 is normal (but A is not) then there is a normal contraction N and a positive definite contraction P of trace class such that parallel to A - N parallel to 1 = 1/2 parallel to P + P parallel to 1 (where parallel to · parallel to 1 denotes the trace norm). If T is a compact contraction such that its characteristics function admits a scalar factor, if T = A n for some integer n≥2 and contraction A with simple eigen-values, and if both T and A satisfy a ''reductive property'', then A is a compact normal contraction. (author). 16 refs

  5. Electrorretinograma: Valores normales con diferentes protocolos de estudio Electroretinogram: Normal values with different study protocols

    Directory of Open Access Journals (Sweden)

    Rosaralis Paneca Santiesteban

    2005-12-01

    Full Text Available En 7 investigaciones por separado se llevó a cabo, el registro, la observación y comparación de los valores normales de frecuencia macular, amplitud y latencia de las ondas A y B del electrorretinograma, por cada ojo, obtenidos con diferentes electrodos, equipos y protocolos para registrarlo, usados durante los años 1977 hasta el 2000 en el laboratorio de Electrofisiología de la Visión del Instituto de Neurología y Neurocirugía. Se incluyó la metodología del electrorretinograma más recientemente utilizada, según las normas internacionales sobre el electrorretinograma estandarizado de la Sociedad Internacional para la Electrofisiología de la Visión, que fue el único protocolo de este trabajo en que se incluyó midriasis y preadaptación a la oscuridad o a la luz. Los valores de amplitud, latencia y réplica macular de cada uno de esos protocolos se exponen y se comparan entre sí los de similar protocolo. Ademàs, se presentan las curvas y valores del electrorretinograma estandarizado según las normas de la sociedad antes referidaA study was conducted in 7 separate researches, where the normal values of macular frequency, amplitude and latency of the A and B waves of the electroretinogram were recorded, observed and compared for each eye. These data were obtained with different electrodes, equipment and protocols that were used from 1977 to 2000 at the Laboratory of Vision Electrophysiology of the Institute of Neurology and Neurosurgery. These techniques have allowed to characterize diseases and to suggest the site of the injuries causing them

  6. HYPERVASCULAR LIVER LESIONS IN RADIOLOGICALLY NORMAL LIVER.

    Science.gov (United States)

    Amico, Enio Campos; Alves, José Roberto; Souza, Dyego Leandro Bezerra de; Salviano, Fellipe Alexandre Macena; João, Samir Assi; Liguori, Adriano de Araújo Lima

    2017-01-01

    The hypervascular liver lesions represent a diagnostic challenge. To identify risk factors for cancer in patients with non-hemangiomatous hypervascular hepatic lesions in radiologically normal liver. This prospective study included patients with hypervascular liver lesions in radiologically normal liver. The diagnosis was made by biopsy or was presumed on the basis of radiologic stability in follow-up period of one year. Cirrhosis or patients with typical imaging characteristics of haemangioma were excluded. Eighty-eight patients were included. The average age was 42.4. The lesions were unique and were between 2-5 cm in size in most cases. Liver biopsy was performed in approximately 1/3 of cases. The lesions were benign or most likely benign in 81.8%, while cancer was diagnosed in 12.5% of cases. Univariate analysis showed that age >45 years (p3 nodules (p=0.003) and elevated alkaline phosphatase (p=0.013) were significant risk factors for cancer. It is safe to observe hypervascular liver lesions in normal liver in patients up to 45 years, normal alanine aminotransaminase, up to three nodules and no personal history of cancer. Lesion biopsies are safe in patients with atypical lesions and define the treatment to be established for most of these patients. As lesões hepáticas hipervasculares representam um desafio diagnóstico. Identificar fatores de risco para câncer em pacientes portadores de lesão hepática hipervascular não-hemangiomatosa em fígado radiologicamente normal. Estudo prospectivo que incluiu pacientes com lesões hepáticas hipervasculares em que o diagnóstico final foi obtido por exame anatomopatológico ou, presumido a partir de seguimento mínimo de um ano. Diagnóstico prévio de cirrose ou radiológico de hemangioma foram considerados critérios de exclusão. Oitenta e oito pacientes foram incluídos. A relação mulher/homem foi de 5,3/1. A idade média foi de 42,4 anos. Na maior parte das vezes as lesões hepáticas foram únicas e com

  7. Alterações contráteis segmentares e sua associação com arritmias ventriculares complexas, em pacientes chagásicos com eletrocardiograma normal ou borderline Regional left ventricular dysfunction and its association with complex ventricular arrhythmia, in chagasic patients with normal or borderline electrocardiogram

    Directory of Open Access Journals (Sweden)

    Flavia Vernin de Oliveira Terzi

    2010-10-01

    Full Text Available INTRODUÇÃO: Morte súbita representa a principal causa de óbito em chagásicos. Eventos fatais em pacientes saudáveis, com anormalidades contráteis, foram documentados. O objetivo deste trabalho é determinar a associação entre alteração contrátil e arritmias ventriculares complexas em pacientes chagásicos, classe funcional I, eletrocardiograma normal ou borderline e função ventricular preservada. MÉTODOS: Quarenta e nove pacientes com doença de Chagas e eletrocardiograma normal ou borderline realizaram ecocardiograma, teste ergométrico e Holter. Avaliou-se a contratilidade global e segmentar dos ventrículos e a presença de arritmias ventriculares complexas induzidas no esforço e espontâneas, respectivamente. A análise estatística foi feita pelo modelo Log-Linear geral. RESULTADOS: Idade média de 56 anos; 55% mulheres. Alterações contráteis segmentares em 24,5% dos pacientes; 12% dos Holter e 18% dos testes ergométricos positivos. Houve associação entre arritmia e alteração segmentar condicionada à presença da disfunção sistólica leve do ventrículo esquerdo. CONCLUSÕES: Alterações contráteis, na presença de disfunção global leve, indicam pacientes sob maior risco de arritmias complexas.INTRODUCTION: Sudden death is the major cause of death among chagasic patients. A significant number of fatal events in patients without apparent heart disease and borderline electrocardiogram, but with contractile ventricular dysfunction, have been documented. This work aimed to determine the association between regional dysfunction and the presence of ventricular arrhythmia in chagasic patients without apparent heart disease. METHODS: Forty-nine patients with normal or borderline electrocardiogram were submitted to echocardiogram, exercise stress test and Holter. The presence of cardiac contractile alterations and complex ventricular arrhythmia was analyzed. Statistic analysis used the general Log-Linear model. RESULTS

  8. HIPERINFECCIÓN POR STRONGYLOIDES EN ANCIANO CON EPOC

    Directory of Open Access Journals (Sweden)

    Análida Elizabeth Pinilla Roa

    2011-01-01

    Full Text Available Se presenta un caso de un hombre de 81 años natural de zona rural, agricultor, recolector de café 50 años atrás y jardinero por 22 años en Bogotá. Consultó por dolor abdominal de 10 días de evolución, localizado hacia mesogastrio y epigastrio. Además, disnea, tos productiva. Antecedentes: enfermedad pulmonar obstructiva crónica, cor pulmonale, fumador de 25 paquetes /año, había recibido prednisona oral y beclometasona inhalada en diversas ocasiones incluso en la última hospitalización. En el examen físico presentó signos de desnutrición, taquicardia, taquipnea; estertores en base del hemitórax derecho; abdomen: blando, depresible con dolor a la palpación profunda en epigastrio e hipocondrio derecho. Ingresó con síndrome de respuesta inflamatoria sistémica por taquicardia, taquipnea, leucocitosis 37.600 y eosinofilia 52-60%, Ig E: 180 UI/ ml. Se evidenciaron larvas rabditiformes de Strongyloides stercoralis en esputo y materia fecal. La radiografía de tórax mostró derrame pleural derecho, la ecografía hepática fue normal, la endoscopia de vías digestivas altas evidenció gastritis y duodenitis. Se inició tratamiento con ivermectina 200 mg/Kg/dosis, con seguimiento clínico y de laboratorio con evolución clínica satisfactoria.

  9. Homenaje a Rosario Camacho. Por Antonio Bonet Correa.

    Directory of Open Access Journals (Sweden)

    Antonio Bonet Correa

    2013-01-01

    Full Text Available En el actual panorama de la Historia del Arte en España hay que tener en cuenta las valiosísimas aportaciones, tanto científicas como literarias, producidas por las numerosas e importantes figuras femeninas dedicadas a la docencia y a la investigación de una disciplina de las ciencias humanas que, con anterioridad, parecía estar exclusivamente en manos de los varones. Sin duda alguna este hecho se debe al cambio general en las costumbres y a la revolución llevada a cabo por las mujeres en la moderna vida social. En lo que, de manera concreta, se refiere al ámbito universitario y al área de la educación, fue una conquista lenta y progresiva a lo largo del siglo XX. En la pasada centuria, fueron las maestras de escuela, formadas en las Escuelas Normales, las que inicialmente se impusieron en la Primera Enseñanza. Después, en la II República, las mujeres accedieron al profesorado de los Institutos de Segunda Enseñanza. Finalmente, al terminar la Guerra Civil, en el último tercio de la pasada centuria, ocuparon los puestos principales de las universidades, centros de investigación, dirección de museos, galerías de arte y ejercieron con rotundo éxito la historia y la crítica de arte.

  10. Acuerdo por la discreción

    Directory of Open Access Journals (Sweden)

    Yeny Serrano

    2006-01-01

    Full Text Available En este artículo se propone un análisis del texto del Acuerdo por la discreción firmado en 1999 por 32 directores de medios de comunicación para “elevar el nivel de calidad y responsabilidad en el cubrimiento y difusión de hechos violentos”. Se analizan los factores que impiden que este Acuerdo produzca cambios efectivos en la práctica profesional informativa y se presenta un modelo (Lemieux, 2000 que tiene en cuenta las variables que influyen en la producción del discurso informativo mediático.

  11. ANTIOXIDANTES: MICRONUTRIENTES EN LUCHA POR LA SALUD

    OpenAIRE

    Zamora S, Juan Diego

    2007-01-01

    Los antioxidantes son sustancias químicas que se caracterizan por impedir o retrasar la oxidación de diversas sustancias principalmente de los ácidos grasos cuyas reacciones se producen tanto en los alimentos como en el organismo humano, en el cual puede provocar alteraciones fisiológicas importantes desencadenantes de diversas enfermedades. Otra de las funciones de los antioxidantes es facilitar el uso fisiológico del oxígeno por parte de las mitocondrias celulares, ayudando a reducir los ef...

  12. Alarma activada por control remoto selectivo.

    OpenAIRE

    Eguíluz Morán, Luis Ignacio; Lara Santillán, Pedro María; Mañana Canteli, Mario

    1995-01-01

    La finalidad de esta invención consiste en disponer de una alarma que bien evite el robo de objetos ligeros y portátiles por el procedimiento que se conoce como "del tirón" --es decir, arrebatar algo y salir corriendo--, bien permita identificar un equipaje entre otros. La originalidad del dispositivo reside en la activación/desactivación del dispositivo de sonido por control remoto, así como la posibilidad de seleccionar el sonido de salida dependiendo de su finalidad. Se reivindica como de ...

  13. PANORAMA LATINOAMERICANO DEL PAGO POR SERVICIOS AMBIENTALES

    Directory of Open Access Journals (Sweden)

    González T. Ángela

    2008-07-01

    Full Text Available Este documento busca proveer al lector de algunos elementos para el análisis y reflexión en torno al pago por servicios ambientales. Para ello, en primera instancia, aborda algunos conceptos básicos relacionados con economía ambiental, seguido de temas como la valoración económica de servicios ambientales y la implementación de mecanismos de pago por algunos de ellos. Lo anterior esta enriquecido con experiencias o estudios de caso a nivel latinoamericano y colombiano.

  14. Precaval retropancreatic space: Normal anatomy

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Yeon Hee; Kim, Ki Whang; Kim, Myung Jin; Yoo, Hyung Sik; Lee, Jong Tae [Yonsei University College of Medicine, Seoul (Korea, Republic of)

    1992-07-15

    The authors defined precaval retropancreatic space as the space between pancreatic head with portal vein and IVC and analyzed the CT findings of this space to know the normal structures and size in this space. We evaluated 100 cases of normal abdominal CT scan to find out normal anatomic structures of precaval retropancreatic space retrospectively. We also measured the distance between these structures and calculated the minimum, maximum and mean values. At the splenoportal confluence level, normal structures between portal vein and IVC were vessel (21%), lymph node (19%), and caudate lobe of liver (2%) in order of frequency. The maximum AP diameter of portocaval lymph node was 4 mm. Common bile duct (CBD) was seen in 44% and the diameter was mean 3 mm and maximum 11 mm. CBD was located in extrapancreatic (75%) and lateral (60.6%) to pancreatic head. At IVC-left renal vein level, the maximum distance between CBD and IVC was 5 mm and the structure between posterior pancreatic surface and IVC was only fat tissue. Knowledge of these normal structures and measurement will be helpful in differentiating pancreatic mass with retropancreatic mass such as lymphadenopathy.

  15. Normal probability plots with confidence.

    Science.gov (United States)

    Chantarangsi, Wanpen; Liu, Wei; Bretz, Frank; Kiatsupaibul, Seksan; Hayter, Anthony J; Wan, Fang

    2015-01-01

    Normal probability plots are widely used as a statistical tool for assessing whether an observed simple random sample is drawn from a normally distributed population. The users, however, have to judge subjectively, if no objective rule is provided, whether the plotted points fall close to a straight line. In this paper, we focus on how a normal probability plot can be augmented by intervals for all the points so that, if the population distribution is normal, then all the points should fall into the corresponding intervals simultaneously with probability 1-α. These simultaneous 1-α probability intervals provide therefore an objective mean to judge whether the plotted points fall close to the straight line: the plotted points fall close to the straight line if and only if all the points fall into the corresponding intervals. The powers of several normal probability plot based (graphical) tests and the most popular nongraphical Anderson-Darling and Shapiro-Wilk tests are compared by simulation. Based on this comparison, recommendations are given in Section 3 on which graphical tests should be used in what circumstances. An example is provided to illustrate the methods. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  16. 3j Symbols: To Normalize or Not to Normalize?

    Science.gov (United States)

    van Veenendaal, Michel

    2011-01-01

    The systematic use of alternative normalization constants for 3j symbols can lead to a more natural expression of quantities, such as vector products and spherical tensor operators. The redefined coupling constants directly equate tensor products to the inner and outer products without any additional square roots. The approach is extended to…

  17. CT and MRI normal findings

    International Nuclear Information System (INIS)

    Moeller, T.B.; Reif, E.

    1998-01-01

    This book gives answers to questions frequently heard especially from trainees and doctors not specialising in the field of radiology: Is that a normal finding? How do I decide? What are the objective criteria? The information presented is three-fold. The normal findings of the usual CT and MRI examinations are shown with high-quality pictures serving as a reference, with inscribed important additional information on measures, angles and other criteria describing the normal conditions. These criteria are further explained and evaluated in accompanying texts which also teach the systematic approach for individual picture analysis, and include a check list of major aspects, as a didactic guide for learning. The book is primarily intended for students, radiographers, radiology trainees and doctors from other medical fields, but radiology specialists will also find useful details of help in special cases. (orig./CB) [de

  18. Marrow transfusions into normal recipients

    International Nuclear Information System (INIS)

    Brecher, G.

    1983-01-01

    During the past several years we have explored the transfusion of bone marrow into normal nonirradiated mice. While transfused marrow proliferates readily in irradiated animals, only minimal proliferation takes place in nonirradiated recipients. It has generally been assumed that this was due to the lack of available proliferative sites in recipients with normal marrow. Last year we were able to report that the transfusion of 200 million bone marrow cells (about 2/3 of the total complement of marrow cells of a normal mouse) resulted in 20% to 25% of the recipient's marrow being replaced by donor marrow. Thus we can now study the behavior of animals that have been transfused (donor) and endogenous (recipient) marrow cells, although none of the tissues of either donor or recipient have been irradiated. With these animals we hope to investigate the nature of the peculiar phenomenon of serial exhaustion of marrow, also referred to as the limited self-replicability of stem cells

  19. The construction of normal expectations

    DEFF Research Database (Denmark)

    Quitzau, Maj-Britt; Røpke, Inge

    2008-01-01

    The gradual upward changes of standards in normal everyday life have significant environmental implications, and it is therefore important to study how these changes come about. The intention of the article is to analyze the social construction of normal expectations through a case study. The case...... concerns the present boom in bathroom renovations in Denmark, which offers an excellent opportunity to study the interplay between a wide variety of consumption drivers and social changes pointing toward long-term changes of normal expectations regarding bathroom standards. The study is problemoriented...... and transdisciplinary and draws on a wide range of sociological, anthropological, and economic theories. The empirical basis comprises a combination of statistics, a review of magazine and media coverage, visits to exhibitions, and qualitative interviews. A variety of consumption drivers are identified. Among...

  20. Normalized cDNA libraries

    Science.gov (United States)

    Soares, Marcelo B.; Efstratiadis, Argiris

    1997-01-01

    This invention provides a method to normalize a directional cDNA library constructed in a vector that allows propagation in single-stranded circle form comprising: (a) propagating the directional cDNA library in single-stranded circles; (b) generating fragments complementary to the 3' noncoding sequence of the single-stranded circles in the library to produce partial duplexes; (c) purifying the partial duplexes; (d) melting and reassociating the purified partial duplexes to moderate Cot; and (e) purifying the unassociated single-stranded circles, thereby generating a normalized cDNA library.

  1. Random Generators and Normal Numbers

    OpenAIRE

    Bailey, David H.; Crandall, Richard E.

    2002-01-01

    Pursuant to the authors' previous chaotic-dynamical model for random digits of fundamental constants, we investigate a complementary, statistical picture in which pseudorandom number generators (PRNGs) are central. Some rigorous results are achieved: We establish b-normality for constants of the form $\\sum_i 1/(b^{m_i} c^{n_i})$ for certain sequences $(m_i), (n_i)$ of integers. This work unifies and extends previously known classes of explicit normals. We prove that for coprime $b,c>1$ the...

  2. Pedro Teixeira y su viaje por Mesopotamia

    Directory of Open Access Journals (Sweden)

    Fuente del Pilar, José Javier

    2005-04-01

    Full Text Available Pedro Teixeira es un integrante notable de la ilustre nómina de los viajeros portugueses que, a finales del s, XVI y principios del XVII, ensancharon para Occidente las fronteras del mundo. Su conocimiento en España se debe a la publicación en 1994 de su obra «Relaciones del Origen, Descendencia y Sucesión de los Reyes de Persia, y de Harmuz, y de un viaje hecho por el autor dende la India hasta Italia por tierra», en edición realizada por el profesor Eduardo Barajas Sala, lamentablemente fallecido en 1997. En este artículo se ofrece una reseña biográfica de Pedro Teixeira, y un análisis del viaje narrado por el autor en la última parte de sus «Relaciones »: el que desde Ormuz le conducirá, a través de Mesopotamia, hasta la costa del Mediterráneo.…

  3. Ejecución de puentes pretensados por voladizos sucesivos

    Directory of Open Access Journals (Sweden)

    Fernández Casado, Carlos

    1963-12-01

    Full Text Available The system of construction whereby successive extensions of a cantilevered structure are carried out has made it possible to extend, to an extraordinary extent, the free spans of straight section prestressed concrete bridges. At present the Bendorf bridge is being constructed, whose central span in 258 ms long. This system was first used in Brazil, for the construction of an ordinary reinforced concrete bridge over the river Peixe. But the method fell into disuse, except for very few exceptions, until Firsterwalder against brought it up to date 20 years later, when building the Neckar bridge, made of prestressed concrete. With new technique all the advantages of the system could be exploited, as well as achieving a very rapid construction. This constructional procedure leads directly to the structural type known as compensated cantilevers. T shaped cells are attached together by means of prestressing cables to form advancing cantilevers. Thereby a total bridge structure is formed, whose span is twice that of each cantilevered half. This method can be applied to other bridge types, such as dintels with overhanging sections (this was the first new application, single span portal frames, T portal frames, continuous beams, etc. The typical constructional method is to move the formwork, which is anchored and cantilevered beyond the constructed part. A weekly progress of 3,50 ms is normal. It is also possible to employ prefabricated sections, which are successively joined to the ones already in place. (Owing to the length of this article, it will be published in several successive issues.El sistema de construcción por voladizos sucesivos ha permitido ampliar, de modo extraordinario, las luces de los puentes de tramo recto de hormigón pretensado. Actualmente se construye el puente de Bendorf con tramo central de 258 metros. Se utilizó por primera vez en Brasil para la construcción de un puente de hormigón armado normal sobre el río Peixe, pero

  4. Ejecución de puentes pretensados por voladizos sucesivos

    Directory of Open Access Journals (Sweden)

    Fernández Casado, Carlos

    1964-02-01

    Full Text Available The system of construction whereby successive extensions of a cantilevered structure are carried out has made it possible to extend, to an extraordinary extent, the free spans of straight section prestressed concrete bridges. At present the Bendorf bridge is being constructed, whose central span is 358 m long. This system was first used in Brazil, for the construction of an ordinary reinforced concrete bridge over the river Peixe. But the method fell into disuse, except for very few exceptions, until Firsterwalder again brought it up to date 20 years later, when building the Neckar bridge, made of prestressed concrete. With this new technique all the advantages of the system could be exploited, as well as achieving a very rapid construction. This constructional procedure leads directly to the structural type known as compensate cantilevers. T shaped cells are attached together by means of prestressing cables to form advancing cantilevers. Thereby a total bridge structure is formed, whose span is twice that of each cantilevered half. This method can be applied to other bridge types, such as dintels with overhanging sections (this was the first new application, single span portal frames, T portal frames, continuous beams, etc. The typical constructional method is to move the formwork, which is anchored and cantilevered beyond the constructed part. A weekly progress of 3,50 m is normal. It is also possible to employ prefabricated sections, which are successively joined to the ones already in place. (Owing to the length of this article, it will be published in several successive issues.El sistema de construcción por voladizos sucesivos ha permitido ampliar, de modo extraordinario, las luces de los puentes de tramo recto de hormigón pretensado. Actualmente se construye el puente de Bendorf con tramo central de 258 metros. Se utilizó por primera vez en Brasil para la construcción de un puente de hormigón armado normal sobre el río Peixe, pero

  5. Complete normal ordering 1: Foundations

    Directory of Open Access Journals (Sweden)

    John Ellis

    2016-08-01

    Full Text Available We introduce a new prescription for quantising scalar field theories (in generic spacetime dimension and background perturbatively around a true minimum of the full quantum effective action, which is to ‘complete normal order’ the bare action of interest. When the true vacuum of the theory is located at zero field value, the key property of this prescription is the automatic cancellation, to any finite order in perturbation theory, of all tadpole and, more generally, all ‘cephalopod’ Feynman diagrams. The latter are connected diagrams that can be disconnected into two pieces by cutting one internal vertex, with either one or both pieces free from external lines. In addition, this procedure of ‘complete normal ordering’ (which is an extension of the standard field theory definition of normal ordering reduces by a substantial factor the number of Feynman diagrams to be calculated at any given loop order. We illustrate explicitly the complete normal ordering procedure and the cancellation of cephalopod diagrams in scalar field theories with non-derivative interactions, and by using a point splitting ‘trick’ we extend this result to theories with derivative interactions, such as those appearing as non-linear σ-models in the world-sheet formulation of string theory. We focus here on theories with trivial vacua, generalising the discussion to non-trivial vacua in a follow-up paper.

  6. Normal forms in Poisson geometry

    NARCIS (Netherlands)

    Marcut, I.T.

    2013-01-01

    The structure of Poisson manifolds is highly nontrivial even locally. The first important result in this direction is Conn's linearization theorem around fixed points. One of the main results of this thesis (Theorem 2) is a normal form theorem in Poisson geometry, which is the Poisson-geometric

  7. Mixed normal inference on multicointegration

    NARCIS (Netherlands)

    Boswijk, H.P.

    2009-01-01

    Asymptotic likelihood analysis of cointegration in I(2) models, see Johansen (1997, 2006), Boswijk (2000) and Paruolo (2000), has shown that inference on most parameters is mixed normal, implying hypothesis test statistics with an asymptotic 2 null distribution. The asymptotic distribution of the

  8. Is My Child's Appetite Normal?

    Science.gov (United States)

    Is My Child’s Appetite Normal? Cayla, who is 4 years old, did not finish her lunch. But she is ready to play. Her ... snack for later. That is okay! Your child’s appetite changes. Children do not grow as fast in ...

  9. Transforming Normal Programs by Replacement

    NARCIS (Netherlands)

    Bossi, Annalisa; Pettorossi, A.; Cocco, Nicoletta; Etalle, Sandro

    1992-01-01

    The replacement transformation operation, already defined in [28], is studied wrt normal programs. We give applicability conditions able to ensure the correctness of the operation wrt Fitting's and Kunen's semantics. We show how replacement can mimic other transformation operations such as thinning,

  10. Semigroups of data normalization functions

    NARCIS (Netherlands)

    Warrens, Matthijs J.

    2016-01-01

    Variable centering and scaling are functions that are typically used in data normalization. Various properties of centering and scaling functions are presented. It is shown that if we use two centering functions (or scaling functions) successively, the result depends on the order in which the

  11. Normalizing Catastrophe: Sustainability and Scientism

    Science.gov (United States)

    Bonnett, Michael

    2013-01-01

    Making an adequate response to our deteriorating environmental situation is a matter of ever increasing urgency. It is argued that a central obstacle to achieving this is the way that scientism has become normalized in our thinking about environmental issues. This is taken to reflect on an underlying "metaphysics of mastery" that vitiates proper…

  12. Neutron RBE for normal tissues

    International Nuclear Information System (INIS)

    Field, S.B.; Hornsey, S.

    1979-01-01

    RBE for various normal tissues is considered as a function of neutron dose per fraction. Results from a variety of centres are reviewed. It is shown that RBE is dependent on neutron energy and is tissue dependent, but is not specially high for the more critical tissues or for damage occurring late after irradiation. (author)

  13. Normal and abnormal growth plate

    International Nuclear Information System (INIS)

    Kumar, R.; Madewell, J.E.; Swischuk, L.E.

    1987-01-01

    Skeletal growth is a dynamic process. A knowledge of the structure and function of the normal growth plate is essential in order to understand the pathophysiology of abnormal skeletal growth in various diseases. In this well-illustrated article, the authors provide a radiographic classification of abnormal growth plates and discuss mechanisms that lead to growth plate abnormalities

  14. Por uma ciência do riso e da sabedoria

    Directory of Open Access Journals (Sweden)

    Paula Corrêa Henning

    2010-06-01

    Full Text Available

    Normal" style="text-align: justify;">O artigo busca problematizar a história das ciências, especialmente o ethos da Modernidade e Pós-modernidade. Para isso, utiliza autores que se anteciparam à Pós-modernidade como Friedrich Nietzsche e Michel Foucault. Na esteira dessa discussão busca uma problematização acerca da Ciência nos rastros da Modernidade e algumas fissuras e fragilidades produzidas na ciência num cenário contemporâneo. Apresenta ainda alguns discursos midiáticos acerca de propagandas televisivas que trazem o discurso científico como legítimo e inabalável. Traz para o campo de discussão uma ciência alegre, como aprendemos com Nietzsche ou prosaica por vezes, anunciando o riso e a sabedoria na produção do conhecimento científico.

    Normal" style="text-align: justify;"> 

  15. Muerte súbita por conmoción cardíaca (Commotio cordis asociada a miocardio no compactado Sudden death due to commotio cordis associated to non compacted myocardium

    Directory of Open Access Journals (Sweden)

    Analía Aquieri

    2011-12-01

    Full Text Available El miocardio no compactado es una rara miocardiopatía congénita caracterizada por la presencia de múltiples y prominentes trabeculaciones profundas en la pared ventricular que definen hendiduras comunicantes con el compartimiento ventricular principal. Es una entidad de baja incidencia y prevalencia que se diagnostica mediante estudios de imágenes como el ecocardiograma Doppler (ED, la tomografía computarizada multicorte (TCM y la resonancia magnética cardíaca (RMC. Puede ser asintomática o manifestarse mediante arritmias, insuficiencia cardíaca o eventos tromboembólicos. Se presenta el caso de un hombre de 33 años, asintomático, que durante la práctica deportiva sufre una conmoción cardíaca (commotio cordis que le produce un paro cardiorrespiratorio. El electrocardiograma mostró un ritmo de aleteo ventricular que requirió cardiodesfibrilación eléctrica. En un ED efectuado inicialmente no se observaron anormalidades significativas, pero otro ED, una TCM y una RMN obtenidos luego del alta, certificaron el hallazgo de miocardio no compactado aislado, descartando coronariopatía. Recibió tratamiento beta bloqueante y antiagregante y se discutió la colocación del cardiodesfibrilador implantable. Se plantea la fisiopatología de la asociación de estas dos infrecuentes y potencialmente letales afecciones.Non compact of the left ventricular myocardium is a rare congenital cardiomyopathy characterized by the presence of multiple and prominent deep trabeculations in the ventricular wall, that define recesses communicated with the main ventricular chamber. This is a condition with low incidence and prevalence, diagnosed through imaging techniques such as Doppler echocardiogram (DE, multi-slice computed tomography (MSCT or magnetic resonance imaging (MRI. Clinically, it may be asymptomatic or manifested by cardiac arrhythmias, heart failure or thromboembolism. This is a report on a 33 year old asymptomatic man who suffered a blow on

  16. Conservación por calor

    OpenAIRE

    Cobos García, Angel; Díaz Rubio, Olga

    2011-01-01

    Esta unidade didáctica denominada Conservación por calor forma parte da materia «Tecnoloxía do procesado de alimentos» que se impartirá no primeiro semestre do 2º curso do Grao en Nutrición Humana e Dietética. A materia estrutúrase en diferentes unidades didácticas, tratando cada unha delas as diferentes tecnoloxías de procesado dos alimentos, tanto de conservación coma de transformación. A presente unidade didáctica aborda a conservación dos alimentos por calor. Este método permite destruír ...

  17. Celulitis por cuerpo extraño

    Directory of Open Access Journals (Sweden)

    Miguel B. Carrasco Guzmán

    2016-01-01

    Full Text Available Las infecciones de la piel y el tejido celular subcutáneo surgen como un grupo importante de afecciones con una alta morbilidad en edades pediátricas, generalmente relacionada con traumatismo y cuerpos extraños. Se presenta el caso de una escolar femenina de 6 años de edad, con síntomas y signos clínicos que sugieren celulitis en el muslo derecho,  por su evolución tórpida se le realizó el estudio ultrasonográfico que confirmó el diagnóstico etiológico de una celulitis secundaria a un traumatismo, provocada por la introducción de un gran cuerpo extraño, que pasó inadvertido para a familia de la menor.

  18. VERA-CS User Support Activities for PoR 14

    Energy Technology Data Exchange (ETDEWEB)

    Kochunas, Brendan [Univ. of Michigan, Ann Arbor, MI (United States)

    2017-11-01

    The purpose of this milestone is to document the user support activities that took place between 10/1/2016 and 3/31/2017 (PoR 14). In the normal PHI workflow, that also extends to several activities within RTM, a Kanban process is followed. This involves creating tickets for specific work items and track the progress to complete these specific work items.

  19. Superconducting versus normal conducting cavities

    CERN Document Server

    Podlech, Holger

    2013-01-01

    One of the most important issues of high-power hadron linacs is the choice of technology with respect to superconducting or room-temperature operation. The favour for a specific technology depends on several parameters such as the beam energy, beam current, beam power and duty factor. This contribution gives an overview of the comparison between superconducting and normal conducting cavities. This includes basic radiofrequency (RF) parameters, design criteria, limitations, required RF and plug power as well as case studies.

  20. Normal Movement Selectivity in Autism

    OpenAIRE

    Dinstein, Ilan; Thomas, Cibu; Humphreys, Kate; Minshew, Nancy; Behrmann, Marlene; Heeger, David J.

    2010-01-01

    It has been proposed that individuals with autism have difficulties understanding the goals and intentions of others because of a fundamental dysfunction in the mirror neuron system. Here, however, we show that individuals with autism exhibited not only normal fMRI responses in mirror system areas during observation and execution of hand movements, but also exhibited typical movement-selective adaptation (repetition suppression) when observing or executing the same movement repeatedly. Moveme...

  1. MIASIS CUTÁNEA POR CORDYLOBIA ANTHROPOPHAGA

    Directory of Open Access Journals (Sweden)

    Miriam Alkorta Gurrutxaga

    2001-01-01

    Full Text Available El incremento progresivo en el número de personas que viajan a países tropicales ha hecho que las enfermedades importadas adquieran una relevancia cada vez mayor. Las miasis (o infestaciones por larvas de moscas cutáneas se encuentran entre este tipo de enfermedades siendo especialmente frecuentes en países tropicales. A propósito de la observación de un caso de miasis cutánea masiva por Cordylobia antropophaga, que ocurrió en una mujer de 34 años de edad al volver de un viaje a Senegal, se ha efectuado una revisión de los casos de miasis cutáneas forunculoides importadas publicados en España, así como de la biología, patología, tratamiento y prevención de la miasis humana por Cordylobia anthropophaga. El caso referido, se caracterizó por la infestación con un número inusualmente elevado de larvas, no sospechándose su etiología hasta la fase final de la enfermedad. La emergencia continuada de larvas (se recogieron 91 generó en la paciente un estado de ansiedad importante. Finalmente, la eliminación de las larvas provocó una rápida mejoría de la paciente. Aunque los casos de miasis cutánea no tienen la gravedad de otras enfermedades importadas, su conocimiento es necesario desde el punto de vista preventivo, diagnóstico y terapeútico. Es importante proceder a la identificación morfológica de las larvas diferenciándolas de otro tipo de miasis con implicaciones terapéuticas diferentes.

  2. Compostos antimicrobianos produzidos por Streptomyces Spp.

    OpenAIRE

    Silva, Ingrid Reis da

    2012-01-01

    O aumento crescente de bact?rias resistentes a antibi?ticos incentiva ? pesquisa por novas subst?ncias antibacterianas. Diante disso, a sele??o de microrganismos com potencial para a produ??o de novos compostos antimicrobianos tem sido amplamente estudada. Dentre estes microrganismos uma especial aten??o ? dada aos actinomicetos que apresentam capacidade de produzir uma variedade de compostos bioativos como antibi?ticos, antif?ngicos, antitumorais entre outros compostos que pod...

  3. Amar por cartas - este inferno de amara

    Directory of Open Access Journals (Sweden)

    Matildes Demetrio dos Santos

    1999-10-01

    Full Text Available Este trabalho tem por objetivo estudar o amor nas Folhas caídas e nas Cartas de amor à Viscondessa da Luz, de Almeida Garrett.Seus poemas cheios de erotismo e sensua lidade, inspirados numa mulher casada, Rosa Montúrar Infante, escandalizaram a sociedade portuguesado sécu lo XIX. Suas cartas de amor, em segredo, criavam uma ficção de características místicas.

  4. Lithium control during normal operation

    International Nuclear Information System (INIS)

    Suryanarayan, S.; Jain, D.

    2010-01-01

    Periodic increases in lithium (Li) concentrations in the primary heat transport (PHT) system during normal operation are a generic problem at CANDU® stations. Lithiated mixed bed ion exchange resins are used at stations for pH control in the PHT system. Typically tight chemistry controls including Li concentrations are maintained in the PHT water. The reason for the Li increases during normal operation at CANDU stations such as Pickering was not fully understood. In order to address this issue a two pronged approach was employed. Firstly, PNGS-A data and information from other available sources was reviewed in an effort to identify possible factors that may contribute to the observed Li variations. Secondly, experimental studies were carried out to assess the importance of these factors in order to establish reasons for Li increases during normal operation. Based on the results of these studies, plausible mechanisms/reasons for Li increases have been identified and recommendations made for proactive control of Li concentrations in the PHT system. (author)

  5. Normalization of Gravitational Acceleration Models

    Science.gov (United States)

    Eckman, Randy A.; Brown, Aaron J.; Adamo, Daniel R.

    2011-01-01

    Unlike the uniform density spherical shell approximations of Newton, the con- sequence of spaceflight in the real universe is that gravitational fields are sensitive to the nonsphericity of their generating central bodies. The gravitational potential of a nonspherical central body is typically resolved using spherical harmonic approximations. However, attempting to directly calculate the spherical harmonic approximations results in at least two singularities which must be removed in order to generalize the method and solve for any possible orbit, including polar orbits. Three unique algorithms have been developed to eliminate these singularities by Samuel Pines [1], Bill Lear [2], and Robert Gottlieb [3]. This paper documents the methodical normalization of two1 of the three known formulations for singularity-free gravitational acceleration (namely, the Lear [2] and Gottlieb [3] algorithms) and formulates a general method for defining normalization parameters used to generate normalized Legendre Polynomials and ALFs for any algorithm. A treatment of the conventional formulation of the gravitational potential and acceleration is also provided, in addition to a brief overview of the philosophical differences between the three known singularity-free algorithms.

  6. Por un humor ético

    Directory of Open Access Journals (Sweden)

    Victor Paramo Valero

    2016-04-01

    Full Text Available Ética del humor es una obra original, abundantemente documentada, de contenido científico y filosófico, que aborda un problema de gran importancia en los actuales estudios de éticas aplicadas. La ética del humor es una nueva ética aplicada que pretende comprender el fenómeno del humor a la luz de sus implicaciones éticas. Como señala el autor, Juan Carlos Siurana, reputado experto en el ámbito de la filosofía práctica, el interés por el humor es un interés por la ética. En la obra no presenta una nueva teoría filosófica del humor –las cuales se han venido sucediendo, al menos, desde los Diálogos de Platón–, sino una nueva teoría ética, que toma al humor como objeto principal de análisis. Por tanto, la finalidad es realizar una aportación dentro del ámbito de la ética. Para ello se nutre de distintos estudios psicológicos, biológicos, fisiológicos y neurológicos sobre el humor, así como de clásicas obras de filosofía que han abordado esta cuestión.

  7. El aprendizaje visto por los estudiantes venezolanos

    Directory of Open Access Journals (Sweden)

    Berta Elena Barrios

    2015-01-01

    Full Text Available En el siguiente trabajo se presentan los resultados de un estudio sobre las con-cepciones del aprendizaje de un grupo de estudiantes venezolanos de educa-ción primaria y media. Se trató de replicar el instrumento y procedimiento deanálisis utilizado por los investigadores Berry y Sahlberg (1996, con el objetivode caracterizar cómo conciben el aprendizaje estudiantes venezolanos entre 11y 15 años de edad y compararlo con sus pares ingleses y finlandeses. El análi-sis de resultados se basó en los criterios propuestos por dichos autores, deno-minados Pasos para un Buen Aprendizaje. Los hallazgos indican que los estu-diantes venezolanos conciben el aprendizaje como memorizar conocimientos,básicamente escolares, enseñados por los docentes. Las concepciones deambas poblaciones se ubican en una visión pasiva del aprendizaje. Se discutela vinculación de las concepciones del aprendizaje con las prácticas de la escuela.

  8. Eritema multiforme mayor desencadenado por antimicrobianos

    Directory of Open Access Journals (Sweden)

    Ronaldo de Carvalho Raimundo

    2010-03-01

    Full Text Available El eritema multiforme, aparece como una enfermedad sistémica con la participación de la piel y las membranas mucosas en relación con varios factores como las infecciones bacterianas o virales, y en particular la administración de drogas, analgésicos y antibióticos en general. Se presenta un paciente masculino de 29 años de edad con eritema multiforme mayor desencadenado por antimicrobianos con la aparición de lesiones vesiculares-bulloso-ulcerosas en las regiones de los labios, encías, la lengua y la mucosa genital en tratamiento de una infección del tracto urinario con norfloxacino 400 mg por una semana. Fue realizado un tratamiento de soporte con el uso de colutorios para la higienización bucal y pomada a base de corticoide para protección de las úlceras, antihistamínicos y orientación nutricional de dieta líquida hipercalórica e hiperproteica. Este síndrome está caracterizado como un proceso eruptivo buloso agudo que compromete la calidad de vida del paciente y no hay pruebas de laboratorio específicas por lo que su diagnóstico debe estar basado en la revisión minuciosa de la anamnesis y en los hallazgos clínicos.

  9. Understanding a Normal Distribution of Data.

    Science.gov (United States)

    Maltenfort, Mitchell G

    2015-12-01

    Assuming data follow a normal distribution is essential for many common statistical tests. However, what are normal data and when can we assume that a data set follows this distribution? What can be done to analyze non-normal data?

  10. Quantiles for Finite Mixtures of Normal Distributions

    Science.gov (United States)

    Rahman, Mezbahur; Rahman, Rumanur; Pearson, Larry M.

    2006-01-01

    Quantiles for finite mixtures of normal distributions are computed. The difference between a linear combination of independent normal random variables and a linear combination of independent normal densities is emphasized. (Contains 3 tables and 1 figure.)

  11. Structural Insights into the PorK and PorN Components of the Porphyromonas gingivalis Type IX Secretion System.

    Science.gov (United States)

    Gorasia, Dhana G; Veith, Paul D; Hanssen, Eric G; Glew, Michelle D; Sato, Keiko; Yukitake, Hideharu; Nakayama, Koji; Reynolds, Eric C

    2016-08-01

    The type IX secretion system (T9SS) has been recently discovered and is specific to Bacteroidetes species. Porphyromonas gingivalis, a keystone pathogen for periodontitis, utilizes the T9SS to transport many proteins including the gingipain virulence factors across the outer membrane and attach them to the cell surface via a sortase-like mechanism. At least 11 proteins have been identified as components of the T9SS including PorK, PorL, PorM, PorN and PorP, however the precise roles of most of these proteins have not been elucidated and the structural organization of these components is unknown. In this study, we purified PorK and PorN complexes from P. gingivalis and using electron microscopy we have shown that PorN and the PorK lipoprotein interact to form a 50 nm diameter ring-shaped structure containing approximately 32-36 subunits of each protein. The formation of these rings was dependent on both PorK and PorN, but was independent of PorL, PorM and PorP. PorL and PorM were found to form a separate stable complex. PorK and PorN were protected from proteinase K cleavage when present in undisrupted cells, but were rapidly degraded when the cells were lysed, which together with bioinformatic analyses suggests that these proteins are exposed in the periplasm and anchored to the outer membrane via the PorK lipid. Chemical cross-linking and mass spectrometry analyses confirmed the interaction between PorK and PorN and further revealed that they interact with the PG0189 outer membrane protein. Furthermore, we established that PorN was required for the stable expression of PorK, PorL and PorM. Collectively, these results suggest that the ring-shaped PorK/N complex may form part of the secretion channel of the T9SS. This is the first report showing the structural organization of any T9SS component.

  12. Structural Insights into the PorK and PorN Components of the Porphyromonas gingivalis Type IX Secretion System.

    Directory of Open Access Journals (Sweden)

    Dhana G Gorasia

    2016-08-01

    Full Text Available The type IX secretion system (T9SS has been recently discovered and is specific to Bacteroidetes species. Porphyromonas gingivalis, a keystone pathogen for periodontitis, utilizes the T9SS to transport many proteins including the gingipain virulence factors across the outer membrane and attach them to the cell surface via a sortase-like mechanism. At least 11 proteins have been identified as components of the T9SS including PorK, PorL, PorM, PorN and PorP, however the precise roles of most of these proteins have not been elucidated and the structural organization of these components is unknown. In this study, we purified PorK and PorN complexes from P. gingivalis and using electron microscopy we have shown that PorN and the PorK lipoprotein interact to form a 50 nm diameter ring-shaped structure containing approximately 32-36 subunits of each protein. The formation of these rings was dependent on both PorK and PorN, but was independent of PorL, PorM and PorP. PorL and PorM were found to form a separate stable complex. PorK and PorN were protected from proteinase K cleavage when present in undisrupted cells, but were rapidly degraded when the cells were lysed, which together with bioinformatic analyses suggests that these proteins are exposed in the periplasm and anchored to the outer membrane via the PorK lipid. Chemical cross-linking and mass spectrometry analyses confirmed the interaction between PorK and PorN and further revealed that they interact with the PG0189 outer membrane protein. Furthermore, we established that PorN was required for the stable expression of PorK, PorL and PorM. Collectively, these results suggest that the ring-shaped PorK/N complex may form part of the secretion channel of the T9SS. This is the first report showing the structural organization of any T9SS component.

  13. A locally adaptive normal distribution

    DEFF Research Database (Denmark)

    Arvanitidis, Georgios; Hansen, Lars Kai; Hauberg, Søren

    2016-01-01

    entropy distribution under the given metric. The underlying metric is, however, non-parametric. We develop a maximum likelihood algorithm to infer the distribution parameters that relies on a combination of gradient descent and Monte Carlo integration. We further extend the LAND to mixture models......The multivariate normal density is a monotonic function of the distance to the mean, and its ellipsoidal shape is due to the underlying Euclidean metric. We suggest to replace this metric with a locally adaptive, smoothly changing (Riemannian) metric that favors regions of high local density...

  14. Normal pediatric postmortem CT appearances

    Energy Technology Data Exchange (ETDEWEB)

    Klein, Willemijn M.; Bosboom, Dennis G.H.; Koopmanschap, Desiree H.J.L.M. [Radboud University Medical Center, Department of Radiology and Nuclear Medicine, Nijmegen (Netherlands); Nievelstein, Rutger A.J. [University Medical Center Utrecht, Department of Radiology, Utrecht (Netherlands); Nikkels, Peter G.J. [University Medical Center Utrecht, Department of Pathology, Utrecht (Netherlands); Rijn, Rick R. van [Academic Medical Center, Department of Radiology, Amsterdam (Netherlands)

    2015-04-01

    Postmortem radiology is a rapidly developing specialty that is increasingly used as an adjunct to or substitute for conventional autopsy. The goal is to find patterns of disease and possibly the cause of death. Postmortem CT images bring to light processes of decomposition most radiologists are unfamiliar with. These postmortem changes, such as the formation of gas and edema, should not be mistaken for pathological processes that occur in living persons. In this review we discuss the normal postmortem thoraco-abdominal changes and how these appear on CT images, as well as how to differentiate these findings from those of pathological processes. (orig.)

  15. Multispectral histogram normalization contrast enhancement

    Science.gov (United States)

    Soha, J. M.; Schwartz, A. A.

    1979-01-01

    A multispectral histogram normalization or decorrelation enhancement which achieves effective color composites by removing interband correlation is described. The enhancement procedure employs either linear or nonlinear transformations to equalize principal component variances. An additional rotation to any set of orthogonal coordinates is thus possible, while full histogram utilization is maintained by avoiding the reintroduction of correlation. For the three-dimensional case, the enhancement procedure may be implemented with a lookup table. An application of the enhancement to Landsat multispectral scanning imagery is presented.

  16. Normal modes and continuous spectra

    International Nuclear Information System (INIS)

    Balmforth, N.J.; Morrison, P.J.

    1994-12-01

    The authors consider stability problems arising in fluids, plasmas and stellar systems that contain singularities resulting from wave-mean flow or wave-particle resonances. Such resonances lead to singularities in the differential equations determining the normal modes at the so-called critical points or layers. The locations of the singularities are determined by the eigenvalue of the problem, and as a result, the spectrum of eigenvalues forms a continuum. They outline a method to construct the singular eigenfunctions comprising the continuum for a variety of problems

  17. Normal movement selectivity in autism.

    Science.gov (United States)

    Dinstein, Ilan; Thomas, Cibu; Humphreys, Kate; Minshew, Nancy; Behrmann, Marlene; Heeger, David J

    2010-05-13

    It has been proposed that individuals with autism have difficulties understanding the goals and intentions of others because of a fundamental dysfunction in the mirror neuron system. Here, however, we show that individuals with autism exhibited not only normal fMRI responses in mirror system areas during observation and execution of hand movements but also exhibited typical movement-selective adaptation (repetition suppression) when observing or executing the same movement repeatedly. Movement selectivity is a defining characteristic of neurons involved in movement perception, including mirror neurons, and, as such, these findings argue against a mirror system dysfunction in autism. Copyright 2010 Elsevier Inc. All rights reserved.

  18. ESCRITA EN LA VEJEZ NORMAL

    Directory of Open Access Journals (Sweden)

    Alba Gallo

    2010-01-01

    Full Text Available En esta investigación se analiza la escritura a mano de palabras aisladas en veinte adultos mayores (entre setenta y ochenta años de edad, para determinar si los efectos silábicos hallados en investigaciones previas sobre la escritura de personas jóvenes se conservan o deterioran con la edad. Se diseñaron dos experimentos y en cada uno de ellos se evaluó un efecto silábico diferente: la frecuencia silábica y los límites silábicos de las palabras, respectivamente. Los estímulos de los dos experimentos fueron presentados auditivamente a todos los participantes, quienes debían escribir una a una cada palabra escuchada sobre una tableta gráfica. Los resultados obtenidos (que fueron comparados con los datos arrojados por investigaciones previas que han evaluado los mismos efectos en personas jóvenes demuestran que los efectos silábicos relacionados con la frecuencia y los límites silábicos de las palabras se conservan con la edad, aunque los adultos mayores registran sistemáticamente tiempos de ejecución de la tarea de escritura mucho mayores que los jóvenes.

  19. Desgaste por deslizamiento en seco de aceros perlíticos y bainíticos

    Directory of Open Access Journals (Sweden)

    Cristian Camilo Viáfara Arango

    2004-01-01

    Full Text Available El desgaste por deslizamiento tiene una gran influencia sobre el desempeño de los sistemas rueda-riel, en particular, por el deslizamiento de la pestaña de la rueda sobre la parte interna del riel en una pista curva. Dado que el deslizamiento entre la rueda y el riel involucra efectos de adhesión, altos porcentajes de deslizamiento/rodadura afectan fuertemente el desgaste por fatiga de contacto por rodadura, que actúa en las superficies de contacto. En una máquina Pin sobre Disco se llevaron a cabo ensayos de desgaste por deslizamiento para estudiar el comportamiento del acero perlítico AISI 1070 y el bainítico AISI 15B30. La velocidad de deslizamiento fue 1 ms-1 para todas las pruebas y se utilizaron cargas normales de 10, 30 y 50 N. La resistencia al desgaste fue relacionada con la pérdida de masa medida después de las pruebas y las superficies desgastadas, al igual que las partículas removidas, fueron analizadas por medio de los microscopios óptico y electrónico. Se realizaron perfiles de microdureza bajo las superficies de contacto para analizar el efecto del endurecimiento por deformación. El acero perlítico mostró mayor resistencia al desgaste que el acero bainítico, debido al excelente comportamiento de endurecimiento por deformación de la perlita comparado con el de la bainita. En el acero perlítico se observaron regímenes de desgaste oxidativo, mientras que en el bainítico el principal mecanismo de remoción de material fue el adhesivo, llevando a un daño mucho más fuerte en la superficie. De hecho, el régimen de desgaste para las probetas bainíticas fue siempre severo, aún con la menor carga normal aplicada.

  20. Update on normal tension glaucoma

    Directory of Open Access Journals (Sweden)

    Jyotiranjan Mallick

    2016-01-01

    Full Text Available Normal tension glaucoma (NTG is labelled when typical glaucomatous disc changes, visual field defects and open anterior chamber angles are associated with intraocular pressure (IOP constantly below 21 mmHg. Chronic low vascular perfusion, Raynaud's phenomenon, migraine, nocturnal systemic hypotension and over-treated systemic hypertension are the main causes of normal tension glaucoma. Goldmann applanation tonometry, gonioscopy, slit lamp biomicroscopy, optical coherence tomography and visual field analysis are the main tools of investigation for the diagnosis of NTG. Management follows the same principles of treatment for other chronic glaucomas: To reduce IOP by a substantial amount, sufficient to prevent disabling visual loss. Treatment is generally aimed to lower IOP by 30% from pre-existing levels to 12-14 mmHg. Betaxolol, brimonidine, prostaglandin analogues, trabeculectomy (in refractory cases, systemic calcium channel blockers (such as nifedipine and 24-hour monitoring of blood pressure are considered in the management of NTG. The present review summarises risk factors, causes, pathogenesis, diagnosis and management of NTG.

  1. Normal variation of hepatic artery

    International Nuclear Information System (INIS)

    Kim, Inn; Nam, Myung Hyun; Rhim, Hyun Chul; Koh, Byung Hee; Seo, Heung Suk; Kim, Soon Yong

    1987-01-01

    This study was an analyses of blood supply of the liver in 125 patients who received hepatic arteriography and abdominal aortography from Jan. 1984 to Dec. 1986 at the Department of Radiology of Hanyang University Hospital. A. Variations in extrahepatic arteries: 1. The normal extrahepatic artery pattern occurred in 106 of 125 cases (84.8%) ; Right hepatic and left hepatic arteries arising from the hepatic artery proper and hepatic artery proper arising from the common hepatic artery. 2. The most common type of variation of extrahepatic artery was replaced right hepatic artery from superior mesenteric artery: 6 of 125 cases (4.8%). B. Variations in intrahepatic arteries: 1. The normal intrahepatic artery pattern occurred in 83 of 125 cases (66.4%). Right hepatic and left hepatic arteries arising from the hepatic artery proper and middle hepatic artery arising from lower portion of the umbilical point of left hepatic artery. 2. The most common variation of intrahepatic arteries was middle hepatic artery. 3. Among the variation of middle hepatic artery; Right, middle and left hepatic arteries arising from the same location at the hepatic artery proper was the most common type; 17 of 125 cases (13.6%)

  2. Vasculitis inducida por metimazol: Reporte de caso

    Directory of Open Access Journals (Sweden)

    Miguel Pinto

    2011-07-01

    Full Text Available Se reporta el caso de una paciente con enfermedad de Graves, que presentó vasculitis asociada al uso de metimazol. Mujer de 14 años, que acudió a consulta por presentar intolerancia al calor, tremor distal y palpitaciones. El examen físico mostró bocio difuso, y el perfil tiroideo, TSH suprimida y hormonas tiroideas elevadas. Los anticuerpos antiperoxidasa tiroidea fueron positivos. Se inició tratamiento con metimazol y beta bloqueadores. Después de 20 días, la paciente regresó por presentar malestar general, fiebre, poliartralgia, lesiones cutáneas maculopapulares y edema de miembros inferiores. Los anticuerpos antinucleares fueron negativos y los anticuerpos anticitoplasma de los neutrófilos (ANCA, positivos. Se suspendió el metimazol y se inició prednisona. Después de 10 días de tratamiento, las molestias desaparecieron y la paciente recibió I 131.Las vasculitis asociadas al uso de tionamidas son poco frecuentes, no dependen de la dosis y están asociadas a la presencia de anticuerpos tipo ANCA. Clásicamente, afectan a los vasos pequeños de la piel; sin embargo, también pueden afectar los riñones y pulmones. El cuadro clínico se caracteriza por artralgias y mialgias. En algunos casos puede ocurrir insuficiencia renal de grado variable. En la mayoría de casos, el cuadro remite con la suspensión de la droga; pero, en algunos se requiere el uso de glucocorticoides o inmunosupresores.(Rev Med Hered 2011;22:147-150.

  3. Cefaleia por uso excessivo de medicamentos

    Directory of Open Access Journals (Sweden)

    Ariane Maria Fonseca MIRANDA

    2015-01-01

    Full Text Available Uma variante da cefaleia crônica diária, a cefaleia por uso excessivo de medicamentos é uma manifestação clínica de frequência ≥ 15 dias por mês, durante 3 meses. Possui um diagnóstico deficiente e um tratamento dividido em etapas, sendo a desintoxicação, a etapa de fundamental importância. Este artigo apresenta uma revisão sobre o tema, contribuindo para o esclarecimento das principais manifestações clínicas, principais teorias envolvendo sua fisiopatologia e a terapêutica farmacológica empregada. A metodologia utilizada foi uma revisão de publicações europeias e americanas, no período de 2001 a 2013, nos idiomas português, inglês e espanhol. Todos os medicamentos utilizados no tratamento sintomático das cefaleias são capazes de cronificar uma cefaleia preexistente, desde que sejam utilizados excessivamente, de forma regular e continuada. A suspensão de tais agentes terapêuticos resultará em melhoria na maioria dos pacientes, porém pode ser necessária a introdução de uma terapia de suporte de transição e/ou terapia profilática. Os tratamentos nao farmacológicos, quando associados ao farmacológico, ampliam a possibilidade de resultados satisfatórios, evitando recaídas.

  4. Intoxicación por Superwarfarinas

    OpenAIRE

    Patricia Crecente Otero; Jorge Luis Torres Triana; Ronald Macías Casanova; Luis Manuel Sánchez Rodríguez

    2012-01-01

    Las denominadas superwarfarinas se desarrollaron a partir de la década de 1970 como solución a las resistencias que habían desarrollado los roedores a los raticidas hasta entonces existentes1. Sus principales ventajas son su mayor potencia (hasta 100 veces más potentes que la warfarina)2 y el disponer de una semivida más larga (hasta 6-8 semanas). Presentamos el caso de un paciente varón que ingresa en nuestro servicio de Medicina Interna por otorragia y hematuria para estudio. Como único ant...

  5. Intoxicación ocupacional por mercurio

    OpenAIRE

    Augusto V Ramírez

    2008-01-01

    El mercurio, metal pesado ampliamente utilizado por el hombre, es muy tóxico; produce daño al sistema nervioso central, perturbaciones del comportamiento y lesiones renales. Se acumula en todos los seres vivos y no es esencial para ningún proceso biológico. La toxicidad del mercurio está directamente relacionada con su estado químico. El metilmercurio es la forma más dañina, con efectos neurotóxicos en adultos y en fetos de madres expuestas. El mercurio metálico no es menos tóxico. Las sales ...

  6. Refrigeración solar por eyector

    OpenAIRE

    Pizarro Romanillos, Raúl

    2014-01-01

    La finalidad de este trabajo es el estudio de un método de refrigeración que ayude a reducir el impacto medioambiental que producen otros sistemas de refrigeración más convencionales. Este método consiste en combinar la energía del Sol, que es renovable y gratuita, con un sistema de refrigeración por eyección que, a pesar de no tener alta eficiencia, tiene importantes ventajas como la de tener un bajo coste y una menor complejidad que otros sistemas. Para comenzar el estudio se hará un bre...

  7. Osteonecrosis de hueso maxilar inducida por bisfosfonatos

    OpenAIRE

    Vera Sempere, Francisco José

    2016-01-01

    Los bisfosfonatos son un grupo de fármacos, análogos de los pirofosfatos, utilizados en administración oral en el tratamiento de la osteoporosis, así como en formulaciones intravenosas para el tratamiento del dolor óseo y de la hipercalcemia ligada a la enfermedad tumoral metastasica (generalmente en el contexto de mieloma múltiple / cáncer de mama o próstata avanzados), actuando como un inhibidor de la reabsorción ósea, mediada por osteoclastos, así como de la apoptosis de los osteobl...

  8. Estudio del desgaste por deslizamiento en bronces

    OpenAIRE

    Carlos Holguín; John Coronado

    2007-01-01

    Se evaluaron tres bronces: SAE 67, nacional y americano usados típicamente como material de la chumacera en los molinos de caña de azúcar. Se realizaron pruebas desgaste por deslizamiento bajo la norma G77 usando bloques de bronce, anillos de acero SAE 1045 y aceite como lubricante. El tribómetro se calibró usando los anillos de acero SAE 4620 y se usó acero de herramienta SAE O1 para los bloques. Se realizaron metalografías, durezas y rugosidad de los materiales estudiados. El bronce naciona...

  9. Por uma arte no mundo da vida

    Directory of Open Access Journals (Sweden)

    Rachel Costa

    2016-12-01

    Full Text Available O artigo visa debater a análise colocada por Jacinto Lageira no texto “As razões do agir, contribuição a uma poética da ação”. O debate se estabelece no que concerne ao problema da autonomia da arte e suas consequências, tendo em vista a necessidade de pensar possibilidades contemporâneas para a experiência estética que pressuponham o mundo material. Isso é realizado a partir da teoria dos gestos do filósofo Vilém Flusser.

  10. Formação por ciclos

    OpenAIRE

    Nedbajluk,Lidia

    2006-01-01

    Artigo desenvolvido a partir dos estudos de Mestrado na Universidade Federal do Paraná, na linha de pesquisa Currículo, Conhecimento e Saberes nas Práticas Escolares, investigando a Formação por Ciclos. Analisa a diversidade de termos utilizados como complemento ao termo ciclos no ensino fundamental (Ciclos de Aprendizagem; Escola em Ciclos; Ensino em Ciclos; Ciclos de Desenvolvimento; Ciclos de Formação; Ciclo de Estudos) e esclarece a inadequação do uso dos mesmos indistintamente. Considera...

  11. ESTUDIO DEL IMPACTO TÉCNICO DE MEZCLAS DE CONCRETO HIDRÁULICO POR LA SUSTITUCIÓN PARCIAL DE CEMENTO POR ZEOLITA

    Directory of Open Access Journals (Sweden)

    I. Miranda Pasos

    2014-06-01

    Full Text Available La industria de la construcción cada vez más consciente de la necesidad de ejecutar obras con materiales que se obtengan y/o utilicen procesos industriales que minimicen la contaminación y, que contribuyan en el comportamiento de un producto como lo es el concreto hidráulico en la construcción, ha estado buscando alternativas de materiales que sustituyan total o parcialmente al cemento por otro cementante que contamine menos en su procesos de obtención y que conserve las propiedades o las mejore. Una alternativa para sustitución parcial del cemento es la zeolita, es un mineral que se obtiene por proceso de excavación y molienda de puzolana. La norma ASTM-618, define a las puzolanas como materiales silíceo o aluminio-silíceo que por sí solo poseen poco a ningún valor cementante, pero cuando se han dividido finamente y en presencia de agua e hidróxido de calcio (Cal reaccionan químicamente a temperatura ambiente para formar cementantes (Miranda, 2008. Recientemente se ha estudiado el efecto de adicionar mineral Cal-Zeolita para la elaboración del concreto, cuyos resultados son favorables al comportamiento mecánico y su durabilidad (Dopico J.J., et al. 2009. Para la elaboración de morteros para recubrimientos al incorporar arenas zeolíticas como sustituto de la arena tradicional (Tiburcio et al. 2008. El presente proyecto evaluó el comportamiento del concreto hidráulico en estado fresco y endurecido al sustituir de manera parcial cemento por zeolita. Se enfocó a la evaluación del comportamiento mecánico como al diseño de la mezcla de concreto hidráulico fabricado con cemento normal y con cemento-zeolita. Tomando en cuenta los resultados obtenidos, la zeolita incorporada en porcentajes entre el 5% y 10 % tiende a valores de resistencias muy cercanos al concreto normal, los modelos obtenidos así lo corroboran, por lo que se puede concluir la factibilidad de sustitución parcial de cemento por zeolita tomando en cuenta el

  12. Disfunção ventricular esquerda transitória por cardiomiopatia induzida por estresse Transient left ventricular dysfunction due to stress-induced cardiomyopathy

    Directory of Open Access Journals (Sweden)

    Marcus Vinicius Simões

    2007-10-01

    Full Text Available Apresenta-se o caso de uma paciente de 71 anos que preencheu os critérios diagnósticos para cardiomiopatia induzida por estresse que foi desencadeada por intenso estresse emocional após atropelamento por bicicleta. O quadro clínico mimetizou o infarto agudo do miocárdio, manifestando-se com dor precordial, supradesnivelamento do segmento ST, seguido por ondas T profundas e prolongamento do intervalo QT, elevação discreta de enzimas cardíacas e cursando com disfunção sistólica apical do ventrículo esquerdo e hipercinesia das porções basais (conferindo o aspecto de "abaloamento apical", mas na ausência de obstrução coronariana subepicárdica. A função ventricular normalizou-se após a segunda semana de evolução.The case presented here is of a 71-yr-old female patient who met the diagnostic criteria for stress-induced cardiomyopathy, which was triggered by intense emotional stress after being hit by a bicycle. The clinical picture mimicked that of an acute myocardial infarction, manifesting as precordial pain, ST-segment depression followed by deep negative T waves and prolonging of the QT interval, slight increase in cardiac enzymes and coursing with transient apical ballooning of the left ventricle and hyperkinesis of the basal walls (conferring the aspect of "apical ballooning", although in the absence of subepicardial coronary obstruction. Ventricular function normalized after the second week of clinical evolution.

  13. Is My Penis Normal? (For Teens)

    Science.gov (United States)

    ... Videos for Educators Search English Español Is My Penis Normal? KidsHealth / For Teens / Is My Penis Normal? Print en español ¿Es normal mi pene? ... any guy who's ever worried about whether his penis is a normal size. There's a fairly wide ...

  14. Normal vibrations in gallium arsenide

    International Nuclear Information System (INIS)

    Dolling, G.; Waugh, J.L.T.

    1964-01-01

    The triple axis crystal spectrometer at Chalk River has been used to observe coherent slow neutron scattering from a single crystal of pure gallium arsenide at 296 o K. The frequencies of normal modes of vibration propagating in the [ζ00], (ζζζ], and (0ζζ] crystal directions have been determined with a precision of between 1 and 2·5 per cent. A limited number of normal modes have also been studied at 95 and 184 o K. Considerable difficulty was experienced in obtaining welt resolved neutron peaks corresponding to the two non-degenerate optic modes for very small wave-vector, particularly at 296 o K. However, from a comparison of results obtained under various experimental conditions at several different points in reciprocal space, frequencies (units 10 12 c/s) for these modes (at 296 o K) have been assigned: T 8·02±0·08 and L 8·55±02. Other specific normal modes, with their measured frequencies are (a) (1,0,0): TO 7·56 ± 008, TA 2·36 ± 0·015, LO 7·22 ± 0·15, LA 6·80 ± 0·06; (b) (0·5, 0·5, 0·5): TO 7·84 ± 0·12, TA 1·86 ± 0·02, LO 7·15 ± 0·07, LA 6·26 ± 0·10; (c) (0, 0·65, 0·65): optic 8·08 ±0·13, 7·54 ± 0·12 and 6·57 ± 0·11, acoustic 5·58 ± 0·08, 3·42 · 0·06 and 2·36 ± 004. These results are generally slightly lower than the corresponding frequencies for germanium. An analysis in terms of various modifications of the dipole approximation model has been carried out. A feature of this analysis is that the charge on the gallium atom appears to be very small, about +0·04 e. The frequency distribution function has been derived from one of the force models. (author)

  15. Normal vibrations in gallium arsenide

    Energy Technology Data Exchange (ETDEWEB)

    Dolling, G; Waugh, J L T

    1964-07-01

    The triple axis crystal spectrometer at Chalk River has been used to observe coherent slow neutron scattering from a single crystal of pure gallium arsenide at 296{sup o}K. The frequencies of normal modes of vibration propagating in the [{zeta}00], ({zeta}{zeta}{zeta}], and (0{zeta}{zeta}] crystal directions have been determined with a precision of between 1 and 2{center_dot}5 per cent. A limited number of normal modes have also been studied at 95 and 184{sup o}K. Considerable difficulty was experienced in obtaining welt resolved neutron peaks corresponding to the two non-degenerate optic modes for very small wave-vector, particularly at 296{sup o}K. However, from a comparison of results obtained under various experimental conditions at several different points in reciprocal space, frequencies (units 10{sup 12} c/s) for these modes (at 296{sup o}K) have been assigned: T 8{center_dot}02{+-}0{center_dot}08 and L 8{center_dot}55{+-}02. Other specific normal modes, with their measured frequencies are (a) (1,0,0): TO 7{center_dot}56 {+-} 008, TA 2{center_dot}36 {+-} 0{center_dot}015, LO 7{center_dot}22 {+-} 0{center_dot}15, LA 6{center_dot}80 {+-} 0{center_dot}06; (b) (0{center_dot}5, 0{center_dot}5, 0{center_dot}5): TO 7{center_dot}84 {+-} 0{center_dot}12, TA 1{center_dot}86 {+-} 0{center_dot}02, LO 7{center_dot}15 {+-} 0{center_dot}07, LA 6{center_dot}26 {+-} 0{center_dot}10; (c) (0, 0{center_dot}65, 0{center_dot}65): optic 8{center_dot}08 {+-}0{center_dot}13, 7{center_dot}54 {+-} 0{center_dot}12 and 6{center_dot}57 {+-} 0{center_dot}11, acoustic 5{center_dot}58 {+-} 0{center_dot}08, 3{center_dot}42 {center_dot} 0{center_dot}06 and 2{center_dot}36 {+-} 004. These results are generally slightly lower than the corresponding frequencies for germanium. An analysis in terms of various modifications of the dipole approximation model has been carried out. A feature of this analysis is that the charge on the gallium atom appears to be very small, about +0{center_dot}04 e. The

  16. Nodulose por Metotrexato Methotrexate Induced Nodulosis

    Directory of Open Access Journals (Sweden)

    Fernanda Guidolin

    2005-08-01

    Full Text Available A nodulose por metotrexato (MTX é um dos efeitos colaterais pouco conhecidos do uso desse medicamento em doses baixas. Embora classicamente descrita em casos de artrite reumatóide, tem aparecido, também, em outras doenças reumáticas. Descreve-se aqui um caso de nodulose por MTX em uma paciente com artrite reumatóide soropositiva, que utilizava esse medicamento há um ano, com bom controle do processo articular. Segue-se uma breve revisão sobre o assunto.Methotrexate-induced nodulosis is a rare side effect of this drug when it is used in low doses. Although classically described in rheumatoid arthritis patients, it may also appear in other rheumatic disorders. We describe a seropositive rheumatoid arthritis patient who developed methotrexate-induced nodulosis after using this drug for a year, with good control of articular symptoms. This case presentation is followed by a brief revision on the subject.

  17. Investigando o Consumo de Lazer por Idosos

    Directory of Open Access Journals (Sweden)

    Marcelo de Rezende Pinto

    2015-06-01

    Full Text Available A partir da constatação de que ainda são incipientes os estudos que buscam investigar a perspectiva cultural do consumo, atrelada à percepção de que pouco se pesquisou sobre o consumo de lazer de consumidores da terceira idade, o artigo tem por objetivo geral apresentar resultados de uma pesquisa empírica cujo objetivo foi investigar como as experiências de consumo nas atividades de lazer por indivíduos da terceira idade interagem com o sistema cultural e simbólico envolvido no fluxo da vida social cotidiana. Para se atingir esses objetivos, adotou-se uma perspectiva interpretativa de investigação, a partir de uma abordagem etnográfica. Os resultados parecem indicar que os processos sociais, desde a construção de relacionamentos entre familiares, amigos e vizinhos até a construção de redes de convivência com integrantes dos clubes de terceira constituem-se os principais processos presentes nas atividades de lazer desses indivíduos.

  18. Reacciones adversas por antiinflamatorios no esteroideos

    Directory of Open Access Journals (Sweden)

    Luisa Ivet Sánchez Ricardo

    2011-03-01

    Full Text Available Se realizó un estudio descriptivo y transversal en el Consultorio Médico de la Familia No. 28 perteneciente al Policlínico Universitario y Docente "Dr. Mario Muñoz Monroy" desde el 1ro. de junio al 31 de diciembre de 2008, con el objetivo de detectar las reacciones adversas más frecuentes provocadas por el consumo de antiinflamatorios no esteroideos. El universo estuvo constituido por 105 pacientes que asistieron a consulta en el tiempo de estudio y de estos se seleccionó una muestra de 60 pacientes, a quienes se les aplicó un cuestionario de preguntas donde se recogieron las variables de análisis. .Las mujeres resultaron las que más antiinflamatorios consumieron y en el rango de edades de 31-59 años. Las reacciones adversas que más se reportaron fueron la epigastralgia y la hipertensión arterial, así mismo se comprobó la automedicación en algunos pacientes.

  19. Striving for the unknown normal

    DEFF Research Database (Denmark)

    Nielsen, Mikka

    During the last decade, more and more people have received prescriptions for ADHD drug treatment, and simultaneously the legitimacy of the ADHD diagnosis has been heavily debated among both professionals and laymen. Based on an anthropological fieldwork among adults with ADHD, I illustrate how...... the ADHD diagnosis both answers and produces existential questions on what counts as normal behaviour and emotions. The diagnosis helps the diagnosed to identify, accept and handle problems by offering concrete explanations and solutions to diffuse experienced problems. But the diagnostic process...... is not only a clarifying procedure with a straight plan for treatment and direct effects. It is also a messy affair. In a process of experimenting with drugs and attempting to determine how or whether the medication eliminates the correct symptoms the diagnosed is put in an introspective, self...

  20. IIH with normal CSF pressures?

    Directory of Open Access Journals (Sweden)

    Soh Youn Suh

    2013-01-01

    Full Text Available Idiopathic intracranial hypertension (IIH is a condition of raised intracranial pressure (ICP in the absence of space occupying lesions. ICP is usually measured by lumbar puncture and a cerebrospinal fluid (CSF pressure above 250 mm H 2 O is one of the diagnostic criteria of IIH. Recently, we have encountered two patients who complained of headaches and exhibited disc swelling without an increased ICP. We prescribed acetazolamide and followed both patients frequently; because of the definite disc swelling with IIH related symptoms. Symptoms and signs resolved in both patients after they started taking acetazolamide. It is generally known that an elevated ICP, as measured by lumbar puncture, is the most important diagnostic sign of IIH. However, these cases caution even when CSF pressure is within the normal range, that suspicion should be raised when a patient has papilledema with related symptoms, since untreated papilledema may cause progressive and irreversible visual loss.

  1. CT in normal pressure hydrocephalus

    International Nuclear Information System (INIS)

    Fujita, Katsuzo; Nogaki, Hidekazu; Noda, Masaya; Kusunoki, Tadaki; Tamaki, Norihiko

    1981-01-01

    CT scans were obtained on 33 patients (age 73y. to 31y.) with the diagnosis of normal pressure hydrocephalus. In each case, the diagnosis was made on the basis of the symptoms, CT and cisternographic findings. Underlying diseases of normal pressure hydrocephalus are ruptured aneurysms (21 cases), arteriovenous malformations (2 cases), head trauma (1 case), cerebrovascular accidents (1 case) and idiopathie (8 cases). Sixteen of 33 patients showed marked improvement, five, moderate or minimal improvement, and twelve, no change. The results were compared with CT findings and clinical response to shunting. CT findings were classified into five types, bases on the degree of periventricular hypodensity (P.V.H.), the extent of brain damage by underlying diseases, and the degree of cortical atrophy. In 17 cases of type (I), CT shows the presence of P.V.H. with or without minimal frontal lobe damage and no cortical atrophy. The good surgical improvements were achieved in all cases of type (I) by shunting. In 4 cases of type (II), CT shows the presence of P.V.H. and severe brain damage without cortical atrophy. The fair clinical improvements were achieved in 2 cases (50%) by shunting. In one case of type (III), CT shows the absence of P.V.H. without brain damage nor cortical atrophy. No clinical improvement was obtained by shunting in this type. In 9 cases of type (IV) with mild cortical atrophy, the fair clinical improvement was achieved in two cases (22%) and no improvement in 7 cases. In 2 cases of type (V) with moderate or marked cortical atrophy, no clinical improvement was obtained by shunting. In conclusion, it appeared from the present study that there was a good correlation between the result of shunting and the type of CT, and clinical response to shunting operation might be predicted by classification of CT findings. (author)

  2. Lucro por ação

    Directory of Open Access Journals (Sweden)

    Gabriel Moreira Campos

    2001-08-01

    Full Text Available Este trabalho tem por objetivo demonstrar os principais conceitos acerca do Lucro por Ação (Earnings per Share, o qual se apresenta como um quociente de grande utilidade nas entidades. Serão demonstrados aspectos sobre o assunto presentes no Brasil, bem como as normas aplicáveis nos Estados Unidos, emanadas do Financial Accounting Standards Board (FASB, e as normas internacionais, emanadas do International Accounting Standards Committee (IASC. De forma a possibilitar uma visualização mais completa dos conceitos envolvidos, serão desenvolvidos exemplos de sua aplicação. O Lucro (Resultado por Ação pode ser calculado em sua forma básica e em sua forma diluída. Na forma básica, não são considerados os efeitos dos instrumentos potencialmente dilutivos, ao passo que, no cálculo do Lucro (Resultado por Ação Diluído, são. Como instrumentos financeiros potencialmente dilutivos temos as ações preferenciais conversíveis, as debêntures conversíveis e os bônus de subscrição, que podem ser convertidos em ações ordinárias, caracterizando, assim, o próprio potencial dilutivo desses instrumentos. Dessa forma, o trabalho em questão foi dividido em três partes principais, sendo que nas duas últimas constam os referidos exemplos de cálculo do Lucro por Ação em sua forma básica e em sua forma diluída: • aspectos observados no Brasil; • normas emanadas do FASB; • normas emanadas do IASC.The objective of this paper is to demonstrate the principal concepts about Earnings per Share, which is presented as a quotient of great usefulness for the companies. The subject is presented in three parts: in the first part, we will demonstrate relevant aspects that are present in Brazil. In the second part, the applicable standards in the United States will be discussed, which are issued by the Financial Accounting Standards Board (FASB. In the third part, the international standards are dealt with, which are issued by the

  3. Regulación por proteasas del canal de sodio sensible al amiloride (ENaC

    Directory of Open Access Journals (Sweden)

    Luciano Galizia

    2011-04-01

    Full Text Available El ENaC es un canal que permite el movimiento de Na+ desde el líquido luminal hacia las células en numerosos epitelios reabsortivos y también en otros tejidos como la placenta. ENaC juega un papel crucial en la homeostasis de los electrolitos y volumen de líquido extracelular. Es regulado por numerosas hormonas, incluyendo la aldosterona y bloqueado por el diurético amiloride. El ENaC está formado por tres subunidades homólogas α, β y γ que forman el poro por el cual se mueven los iones Na+. Dos factores regulan la actividad del ENaC. 1 el número de canales insertos en la membrana celular y 2 la probabilidad de apertura o tiempo en que se encuentra abierto el canal. El número de canales es el resultado de un balance entre su síntesis y degradación. La probabilidad de apertura depende de la proteólisis de zonas específicas de las subunidades α y γ por múltiples proteasas dentro de la célula y en el espacio extracelular. Entre las proteasas más estudiadas se encuentran la furina, prostasina, elastasa, plasmina y tripsina. Existen sustancias endógenas que bloquean la actividad de estas proteasas como la aprotinina, la bikunina y la nexina-1 y la expresión de las proteasas y sus inhibidores es regulada a su vez por la aldosterona, la tasa de movimiento de Na y el TFGβ. En este trabajo presentamos algunos ejemplos de esta regulación y su potencial papel en condiciones normales y en ciertas enfermedades como la fibrosis quística, renales e hipertensión.

  4. Frecuencia de los grupos sanguíneos A1, A2, Aint, B y O en individuos normales

    OpenAIRE

    García Rosasco, Marcela; Lippi, Samanta; Valverde, Juana

    2001-01-01

    Se definen como A intermedio (Aint) los hematíes que comparten caracteres con A1 y A2. Existen diferencias cualitativas y cuantitativas en los epitopes A. Los hematíes A1 son aglutinados por la lectina de Dolichus biflorus (anti-A1), los A2 por la lectina de Ulex europaeus (anti-H), en tanto los hematíes Aint, son variablemente aglutinados por ambas de manera inesperada. El objetivo del presente trabajo fue determinar la frecuencia de fenotipos A1, Aint, A2, B y O en individuos normales de la...

  5. Toxicidad hepática por medicamentos antituberculosos Hepatotoxicity induced by antituberculosis drugs

    Directory of Open Access Journals (Sweden)

    Isabel Eugenia Escobar Toledo

    2008-01-01

    Full Text Available

    Normal">El fenómeno de la toxicidad hepática inducida por medicamentos cobró relevancia hace algunos años con el estudio de las reacciones adversas a medicamentos. El daño producido en el hígado por un xenobiótico que altera su función es lo que se conoce como toxicidad hepática. La importancia de reconocer y diagnosticar la toxicidad hepática por medicamentos estriba en su gravedad potencial; no en vano es la causa más frecuente por la que la industria farmacéutica retira medicamentos. La tuberculosis es una pandemia que afecta a gran parte de la población mundial y junto con el VIH es una enfermedad cada vez más frecuente en Colombia. Esta enfermedad se puede considerar como una situación especial porque para su tratamiento es preciso suministrar, por largos períodos, medicamentos con potencial tóxico para el hígado.

    Normal"> 

    Normal">El objetivo de este artículo es revisar algunos aspectos relacionados con la toxicidad hepática secundaria a medicamentos antituberculosos, tales como: epidemiología, factores de riesgo, mecanismos de toxicidad, manifestaciones clínicas, diagnóstico, tratamiento y seguimiento.

    Normal">Hepatotoxicity is the alteration of liver structure and function induced by either drugs or other substances. The importance of its proper diagnosis rests on its potential severity. It is the most frequent reason by which the pharmaceutical industry withdraws its products. Tuberculosis is a pandemic infection affecting a large proportion of the world population. Together with HIV infection it is becoming ever more frequent in Colombia. Tuberculosis poses

  6. La Violencia Latinoamericana vista por los Economistas

    Directory of Open Access Journals (Sweden)

    Salama Pierre

    2003-08-01

    Full Text Available

    Salama, Pierre. "La Violencia Lationoamericana vista por los Economistas", Cuadernos de Economía, V. XXII, n. 38, Bogotá, 2003 páginas 179-198.

    Este articulo sintetiza los estudios económicos publicados recientemente sobre la violencia en América Latina y analiza las causas suceptibles a acrecentarla: pobreza, desigualdad de los ingresos en nivel y variación, impunidad, diferencia entre la probabilidad de ser arrestado y la severidad de la pena impuesta, y narcotrafico. Sin embargo, la explicación de la violencia no se limitará a los factores económicos, puesto que el autor privilegia un enfoque inspirado en la antropología y la sociología.

  7. Toxicidad por óxido de etileno

    Directory of Open Access Journals (Sweden)

    Téllez M. Jairo A.

    1993-08-01

    Full Text Available

    El óxido de etileno, es un compuesto epóxido gaseoso, ampliamente utilizado en nuestro medio como agente esterilizante y de desinfección en instituciones hospitalarias. Los estudios realizados en varios países han demostrado efectos sobre la salud humana, caracterizados por  hipersensibilidad dérmica, irritación del tracto respiratorio, irritación ocular, excitación del S.N.C. y se asocia con presencia de abortos expontáneos, aberraciones cromosómicas e irritación crónica de laringe y tráquea en personal expuesto ocupacionalmente.

  8. Infeções alimentares por Campylobacter

    OpenAIRE

    Neto, Carlota Duarte Castro

    2017-01-01

    Dissertação para obtenção do grau de Mestre no Instituto Superior de Ciências da Saúde Egas Moniz Após o isolamento bem-sucedido em fezes na década de setenta do século passado (1972), Campylobacter tornou-se rapidamente a espécie bacteriana mais comumente associada a doenças diarreicas em todo o mundo. A infeção por Campylobacter provoca um espectro de doenças, incluindo enterite aguda, infeções extra-gastrointestinais e complicações pós-infeciosas. A doença gastrointestinal autolimita...

  9. fluidizado por proceso autotérmico

    Directory of Open Access Journals (Sweden)

    ZULAMITA ZAPATA BENABITHE

    2005-01-01

    Full Text Available El presente trabajo se basa en el estudio de la producción de carbón activado a partir de carbón mineral subbituminoso en un reactor de lecho fluidizado por proceso autotérmico. El carbón utilizado provino de la región de Amagá (Antioquia - Colombia y fue activado en dos reactores de lecho fluidizado de diferente diámetro interno, 10 cm y 22 cm. Los valores del área superficial específica y el volumen de poro de las muestras activadas fueron determinados a partir de las isotermas de N2 y CO2. Los resultados experimentales mostraron que los valores de áreas superficiales BET y DR y del Índice de Yodo se encontraron alrededor de 460 m2/g (SBET, 490 m2/g (SDR y 460 mg I2/g carbón.

  10. Normalization of emotion control scale

    Directory of Open Access Journals (Sweden)

    Hojatoolah Tahmasebian

    2014-09-01

    Full Text Available Background: Emotion control skill teaches the individuals how to identify their emotions and how to express and control them in various situations. The aim of this study was to normalize and measure the internal and external validity and reliability of emotion control test. Methods: This standardization study was carried out on a statistical society, including all pupils, students, teachers, nurses and university professors in Kermanshah in 2012, using Williams’ emotion control scale. The subjects included 1,500 (810 females and 690 males people who were selected by stratified random sampling. Williams (1997 emotion control scale, was used to collect the required data. Emotional Control Scale is a tool for measuring the degree of control people have over their emotions. This scale has four subscales, including anger, depressed mood, anxiety and positive affect. The collected data were analyzed by SPSS software using correlation and Cronbach's alpha tests. Results: The results of internal consistency of the questionnaire reported by Cronbach's alpha indicated an acceptable internal consistency for emotional control scale, and the correlation between the subscales of the test and between the items of the questionnaire was significant at 0.01 confidence level. Conclusion: The validity of emotion control scale among the pupils, students, teachers, nurses and teachers in Iran has an acceptable range, and the test itemswere correlated with each other, thereby making them appropriate for measuring emotion control.

  11. Digital Pupillometry in Normal Subjects

    Science.gov (United States)

    Rickmann, Annekatrin; Waizel, Maria; Kazerounian, Sara; Szurman, Peter; Wilhelm, Helmut; Boden, Karl T.

    2017-01-01

    ABSTRACT The aim of this study was to evaluate the pupil size of normal subjects at different illumination levels with a novel pupillometer. The pupil size of healthy study participants was measured with an infrared-video PupilX pupillometer (MEye Tech GmbH, Alsdorf, Germany) at five different illumination levels (0, 0.5, 4, 32, and 250 lux). Measurements were performed by the same investigator. Ninety images were executed during a measurement period of 3 seconds. The absolute linear camera resolution was approximately 20 pixels per mm. This cross-sectional study analysed 490 eyes of 245 subjects (mean age: 51.9 ± 18.3 years, range: 6–87 years). On average, pupil diameter decreased with increasing light intensities for both eyes, with a mean pupil diameter of 5.39 ± 1.04 mm at 0 lux, 5.20 ± 1.00 mm at 0.5 lux, 4.70 ± 0.97 mm at 4 lux, 3.74 ± 0.78 mm at 32 lux, and 2.84 ± 0.50 mm at 250 lux illumination. Furthermore, it was found that anisocoria increased by 0.03 mm per life decade for all illumination levels (R2 = 0.43). Anisocoria was higher under scotopic and mesopic conditions. This study provides additional information to the current knowledge concerning age- and light-related pupil size and anisocoria as a baseline for future patient studies. PMID:28228832

  12. Normal modes of Bardeen discs

    International Nuclear Information System (INIS)

    Verdaguer, E.

    1983-01-01

    The short wavelength normal modes of self-gravitating rotating polytropic discs in the Bardeen approximation are studied. The discs' oscillations can be seen in terms of two types of modes: the p-modes whose driving forces are pressure forces and the r-modes driven by Coriolis forces. As a consequence of differential rotation coupling between the two takes place and some mixed modes appear, their properties can be studied under the assumption of weak coupling and it is seen that they avoid the crossing of the p- and r-modes. The short wavelength analysis provides a basis for the classification of the modes, which can be made by using the properties of their phase diagrams. The classification is applied to the large wavelength modes of differentially rotating discs with strong coupling and to a uniformly rotating sequence with no coupling, which have been calculated in previous papers. Many of the physical properties and qualitative features of these modes are revealed by the analysis. (author)

  13. Curva dos valores normais de peso fetal estimado por ultra-sonografia segundo a idade gestacional

    Directory of Open Access Journals (Sweden)

    José Guilherme Cecatti

    Full Text Available Este trabalho teve por objetivo avaliar a evolução do peso fetal estimado em gestações normais de 20 a 42 semanas. Quanto ao desenho e métodos empregados na pesquisa, realizou-se estudo descritivo de um universo constituído por 2.874 gestantes normais da cidade de Campinas, efetuando-se exame ultra-sonográfico obstétrico de rotina com medida da biometria fetal e utilizando-se, para o cálculo do peso fetal, a fórmula de Hadlock et al. (1991. Calcularam-se os valores dos percentis 10, 50 e 90 do peso fetal, por idade gestacional, com construção de curva posteriormente alisada mediante ajuste polinomial de 2º grau. Como resultado, obteve-se que o valor do percentil 50 foi de 368 gramas na 20ª semana, 1.512 gramas na 30ª semana, atingindo 3.417 gramas na 42ª semana. Constatou-se ter havido ganho médio de 200 gramas de peso por semana, de 27 a 38 semanas, a partir de quando o incremento diminuiu. Concluiu-se que a disponibilidade de curva brasileira do peso fetal estimado normal permitirá o diagnóstico pré-natal de seus desvios pela ultra-sonografia.

  14. Defining the "normal" postejaculate urinalysis.

    Science.gov (United States)

    Mehta, Akanksha; Jarow, Jonathan P; Maples, Pat; Sigman, Mark

    2012-01-01

    Although sperm have been shown to be present in the postejaculate urinalysis (PEU) of both fertile and infertile men, the number of sperm present in the PEU of the general population has never been well defined. The objective of this study was to describe the semen and PEU findings in both the general and infertile population, in order to develop a better appreciation for "normal." Infertile men (n = 77) and control subjects (n = 71) were prospectively recruited. Exclusion criteria included azoospermia and medications known to affect ejaculation. All men underwent a history, physical examination, semen analysis, and PEU. The urine was split into 2 containers: PEU1, the initial voided urine, and PEU2, the remaining voided urine. Parametric statistical methods were applied for data analysis to compare sperm concentrations in each sample of semen and urine between the 2 groups of men. Controls had higher average semen volume (3.3 ± 1.6 vs 2.0 ± 1.4 mL, P sperm concentrations (112 million vs 56.2 million, P = .011), compared with infertile men. The presence of sperm in urine was common in both groups, but more prevalent among infertile men (98.7% vs 88.7%, P = .012), in whom it comprised a greater proportion of the total sperm count (46% vs 24%, P = .022). The majority of sperm present in PEU were seen in PEU1 of both controls (69%) and infertile men (88%). An association was noted between severe oligospermia (sperm counts in PEU (sperm in the urine compared with control, there is a large degree of overlap between the 2 populations, making it difficult to identify a specific threshold to define a positive test. Interpretation of a PEU should be directed by whether the number of sperm in the urine could affect subsequent management.

  15. Turbocharging Normalization in Highland Conditions

    Directory of Open Access Journals (Sweden)

    I. V. Filippov

    2017-01-01

    Full Text Available To ensure many production processes are used compressors of various types, including turbochargers, which produce compressed air. The actual performance values of turbochargers used in highlands are significantly different from the certified values, and parameters of compressed air do not always guarantee the smooth and efficient functioning for consumers.The paper presents research results of the turbochargers of 4CI 425MX4 type, a series of "CENTAC", manufactured by INGERSOL – RAND Company. The research has been conducted in industrial highland conditions in difficult climatic environment. There were almost no investigations of turbochargers running in highland conditions. The combination of low atmospheric pressure with high temperature of the intake air causes the abnormal operating conditions of a turbocharger. Only N. M. Barannikov in his paper shows the results of theoretical studies of such operating conditions, but as to the practical research, there is no information at all.To normalize the turbocharger operation an option of the mechanical pressurization in the suction pipe is adopted. As a result of theoretical research, a TurboMAX blower MAX500 was chosen as a supercharger. The next stage of theoretical research was to construct characteristics of the turbocharger 4CI 425MX4 with a mechanical supercharger in the suction pipe. The boost reduces to the minimum the time of using additional compressors when parameters of the intake air are changed and ensures the smooth and efficient functioning for consumers.To verify the results of theoretical studies, namely, the technique for recalculation of the turbocharger characteristics under the real conditions of suction, were carried out the experimental researches. The average error between experimental and theoretical data is 2,9783 %, which confirms the validity of the technique used for reduction of the turbocharger characteristics to those under the real conditions of suction.

  16. Circumvention of herd immunity during an outbreak of meningococcal disease could be correlated to escape mutation in the porA gene of Neisseria meningitidis.

    Science.gov (United States)

    Taha, M K; Bichier, E; Perrocheau, A; Alonso, J M

    2001-03-01

    Meningococcal strains isolated during an outbreak were shown to belong to the ET-5 complex and to harbor a mutation in the VR2 region of the porA gene. They were less susceptible to the bactericidal effect of normal human serum than was the ET-5 wild-type strain. These results are of concern, as PorA is a potential target in vaccine design.

  17. Vaginal Discharge: What's Normal, What's Not

    Science.gov (United States)

    ... Staying Safe Videos for Educators Search English Español Vaginal Discharge: What's Normal, What's Not KidsHealth / For Teens / ... Discharge: What's Normal, What's Not Print What Is Vaginal Discharge? Vaginal discharge is fluid that comes from ...

  18. Should Japan Become a Normal Country

    National Research Council Canada - National Science Library

    Yildiz, Ahmet

    2005-01-01

    This thesis evaluates Japanese geopolitical change in the post-Cold War era. It does so by analyzing Japan's history, its foreign policy since 1945, its reasons for becoming a normal country, and the impact of its normalization...

  19. Fractura por fatiga atípica de la cabeza femoral sobre deslizamiento epifisario crónico

    OpenAIRE

    Escribá Urios, I; Puertes Almenar, L.; Arnau, Rosana; Gomar Sancho, Francisco

    2008-01-01

    Presentamos el caso de un paciente joven con fractura de estrés desplazada cuyo trazo se localiza a nivel de la antigua placa físaria de la cabeza femoral. La imagen radiográfica era claramente de fractura de estrés, posiblemente sobre una secuela de epifisiolisis crónica de cabeza femoral. La cadera contralateral era normal y se descartó un cierre tardío de fisis por hipotiroidismo. Por el desplazamiento de la fractura y tiempo de evolución se trató mediante artroplastia total de sustitución...

  20. Uso de la actividad colinesterasa para el diagnóstico de intoxicaciones por insecticidas organofosforados y carbamatos

    OpenAIRE

    Juan Pérez M.; Martha Olivera A.; María Ruiz O.; David Villar A.; Carlos Giraldo E.

    2012-01-01

    RESUMENObjetivo. La medición de la actividad colinesterasa (ChE) es una prueba rápida y económica que se emplea en el diagnóstico de intoxicaciones por insecticidas organofosforados y carbamatos. Como la interpretación por el laboratorio requiere valores de referencia para cada especie, en este estudio se establecieron las actividades de ChE normales en sangre, cerebro y retina de varias especies de animales domésticos mediante el método de Ellman. Materiales y métodos. Se obtuvieron encéfalo...

  1. A note on totally normal spaces

    International Nuclear Information System (INIS)

    Zougdani, H.K.

    1990-10-01

    In this note we give the necessary and sufficient condition for a topological space X such that the product space X x Y is totally normal for any (non discrete) metric space Y, and we show that a totally normal p-space need not be a perfectly normal in general, which makes Theorem 2 doubtful. (author). 6 refs

  2. Manufacturing technology for practical Josephson voltage normals

    International Nuclear Information System (INIS)

    Kohlmann, Johannes; Kieler, Oliver

    2016-01-01

    In this contribution we present the manufacturing technology for the fabrication of integrated superconducting Josephson serial circuits for voltage normals. First we summarize some foundations for Josephson voltage normals and sketch the concept and the setup of the circuits, before we describe the manufacturing technology form modern practical Josephson voltage normals.

  3. Neutron scattering by normal liquids

    Energy Technology Data Exchange (ETDEWEB)

    Gennes, P.G. de [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1961-07-01

    Neutron data on motions in normal liquids well below critical point are reviewed and classified according to the order of magnitude of momentum transfers {Dirac_h}q and energy transfers {Dirac_h}w. For large momentum transfers a perfect gas model is valid. For smaller q and incoherent scattering, the major effects are related to the existence of two characteristic times: the period of oscillation of an atom in its cell, and the average lifetime of the atom in a definite cell. Various interpolation schemes covering both time scales are discussed. For coherent scattering and intermediate q, the energy spread is expected to show a minimum whenever q corresponds to a diffraction peak. For very small q the standard macroscopic description of density fluctuations is applicable. The limits of the various (q) and (w) domains and the validity of various approximations are discussed by a method of moments. The possibility of observing discrete transitions due to internal degrees of freedom in polyatomic molecules, in spite of the 'Doppler width' caused by translational motions, is also examined. (author) [French] L'auteur examine les donnees neutroniques sur les mouvements dans les liquides normaux, bien au-dessous du point critique, et les classe d'apres l'ordre de grandeur des transferts de quantite de mouvement {Dirac_h}q et des transferts d'energie {Dirac_h}w. Pour les grands transferts de, quantite de mouvement, un modele de gaz parfait est valable. En ce qui concerne les faibles valeurs de q et la diffussion incoherente, les principaux effets sont lies a l'existence de deux temps caracteristiques: la periode d'oscillation d'un atome dans sa cellule et la duree moyenne de vie de l'atome dans une cellule determinee. L'auteur etudie divers systemes d'interpolation se rapportant aux deux echelles de temps. Pour la diffusion coherente et les valeurs intermediaires de q, on presume que le spectre d'energie accuse un minimum chaque fois que q correspond a un pic de

  4. Normal distal pulmonary vein anatomy

    Directory of Open Access Journals (Sweden)

    Wiesława Klimek-Piotrowska

    2016-01-01

    Full Text Available Background. It is well known that the pulmonary veins (PVs, especially their myocardial sleeves play a critical role in the initiation and maintenance of atrial fibrillation. Understanding the PV anatomy is crucial for the safety and efficacy of all procedures performed on PVs. The aim of this study was to present normal distal PV anatomy and to create a juxtaposition of all PV ostium variants.Methods. A total of 130 randomly selected autopsied adult human hearts (Caucasian were examined. The number of PVs ostia was evaluated and their diameter was measured. The ostium-to-last-tributary distance and macroscopic presence of myocardial sleeves were also evaluated.Results. Five hundred forty-one PV ostia were identified. Four classical PV ostia patterns (two left and two right PVs were observed in 70.8% of all cases. The most common variant was the classical pattern with additional middle right PV (19.2%, followed by the common ostium for the left superior and the inferior PVs (4.44%. Mean diameters of PV ostia (for the classical pattern were: left superior = 13.8 ± 2.9 mm; left inferior = 13.3 ± 3.4 mm; right superior = 14.3 ± 2.9 mm; right inferior = 13.7 ± 3.3 mm. When present, the additional middle right PV ostium had the smallest PV ostium diameter in the heart (8.2 ± 4.1 mm. The mean ostium-to-last-tributary (closest to the atrium distances were: left superior = 15.1 ± 4.6 mm; left inferior = 13.5 ± 4.0 mm; right superior = 11.8 ± 4.0 mm; right inferior = 11.0 ± 3.7 mm. There were no statistically significant differences between sexes in ostia diameters and ostium-to-last-tributary distances.Conclusion. Only 71% of the cases have four standard pulmonary veins. The middle right pulmonary vein is present in almost 20% of patients. Presented data can provide useful information for the clinicians during interventional procedures or radiologic examinations of PVs.

  5. Autoagresión por quemaduras

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    Iris Montes de Oca

    1996-04-01

    Full Text Available Se realizó un estudio epidemiológico transversal en los casos de autoagresión por quemaduras, que acudieron al Cuerpo de Guardia del Servicio de Quemados del Hospital "Dr. Ernesto Guevara de la Serna", durante el período comprendido entre los meses de febrero de 1993 y febrero de 1994, con la finalidad de determinar el comportamiento de algunas variables de interés en estos casos. El universo de estudio lo constituyeron 57 casos, cuya información se recolectó de la gráfica general del paciente quemado (Modelo 71-05 y de los registros estadísticos del Servicio de Quemados del Hospital. Como fundamentales resultados y conclusiones se obtienen las siguientes: la mayor frecuencia de casos se encontró en las edades comprendidas entre 15 y 24 años; el sexo femenino resultó ser el más afectado en todos los grupos de edades. La cocina fue el lugar donde se efectuó el acto con mayor frecuencia. Se encontró un alto grado de asociación entre la supervivencia y la presencia de antecedentes de intentos suicidas. Presentaron la mayor incidencia por municipios los de Puerto Padre y Jobabo; el alcohol y el kerosene fueron los agentes causales más utilizados. En la casuística predominaron los grandes quemados.A transversal epidemiological study of the cases of self-aggression by burns, who received medical attention at the Emergency Department of the Burns Service of the "Dr. Ernesto Guevara de la Serna" Hospital from February, 1993 to February, 1994, was carried out aimed at determining the behaviour of some variables of interest in these cases. Fifty seven cases were studied and the information was collected from the general graph of the burn patient (Model 71-05, and from the statistical records of the Burns Service of the hospital. The main results and conclusions reached are the following: the highest frequency of cases was found in ages between 15 and 24; women were the most affected in all age groups; and kitchen was the place where the

  6. Nefrectomía simple por puerto único (LESS) asistida por robot (da Vinci)

    OpenAIRE

    CASTILLO C,OCTAVIO A; VIDAL M,IVAR; SEPÚLVEDA T,FRANCISCO

    2011-01-01

    Introducción: La cirugía mínimamente invasiva en urología avanza rápidamente y la cirugía laparo-endoscópica a través de puerto único (LESS) no es la excepción. Esta técnica por vía laparoscópica presenta mucha dificultad y requiere de un cirujano laparoscópico experimentado debido a la falta de triangulación y el cruce de los instrumentos. Los beneficios del sistema quirúrgico da Vinci® han sido introducidos recientemente en LESS. Presentamos dos casos de nefrectomía LESS asistida por robot....

  7. Consumo Voluntario de Forraje por Rumiantes en Pastoreo Consumo Voluntario de Forraje por Rumiantes en Pastoreo

    Directory of Open Access Journals (Sweden)

    José Mejía Haro

    2012-02-01

    Full Text Available The variation in voluntary forage intake is undoubtedly the major dietary factor determining level and efficiency of ruminant production. This variation is bigger and least predictable for grazing ruminants. Range ruminant productivity and efficiency is relatively low due, partly, to intake limitations; productivity could probably be increased most by increasing intake. Distension of the reticulo-rumen wall is the primary intake regulation mechanism of low-quality roughages in range ruminants, digestibility and rate of ingest passage also affect voluntary intake. Body size and metabolic bodysize as well affect intake of grazing animals. Kind and amount of supplementation, forage availability, and grazing intensity have been related to voluntary forage intake. La variación en el consumo voluntario de forraje es indudablemente el principal factor dietario que determina el nivel y eficiencia de producción en un rumiante. Esta variación es mayor y muy difícil de predecir bajo condiciones de pastoreo. La productividad y eficiencia de rumiantes en pastoreo es relativamente baja debido, en parte, a las limitaciones en el consumo; la productividad probablemente se podrá incrementar si se incrementa el consumo. La distensión de la pared del rumenretículo es el principal mecanismo de regulación del consumo de forrajes de baja calidad en rumiantes en pastoreo, aunque la digestibilidad y la tasa de pasaje también afectan el consumo voluntario. Igualmente, el consumo se ve afectado por el tamaño corporal y peso metabólico del animal, por la cantidad y tipo de suplemento ofrecido, por la disponibilidad de forraje y por la intensidad del pastoreo.

  8. Subpoblaciones neuronales presentes en cultivos primarios de ganglio espinal y su relación con la infección in vitro por virus de rabia

    OpenAIRE

    Hernán Hurtado; Jaime E. Castellanos; Niyibi Quiroga; Marlén Martínez

    2000-01-01

    Normal">El virus de la rabia presenta un fuerte tropismo neuronal y que produce una encefalitis generalmente letal. En un accidente rábico clásico, producido por la mordedura de un animal infectado, el virus es captado por terminaciones nerviosas motoras, autonómicas o sensoriales. Si es captado por estas últimas, el virus se transporta retrógradamente hacia los somas neuronales ubicados en los ganglios espinales y de...

  9. A velhice, entre o normal e o patológico Old age, normality versus pathology

    Directory of Open Access Journals (Sweden)

    Daniel Groisman

    2002-04-01

    Full Text Available Com a ascensão do envelhecimento da população brasileira ao posto de 'problema social', assistimos a um crescimento cada vez maior do número de especialistas dedicados a este 'grupo etário': os geriatras e gerontólogos, que ocupam papel de destaque na formulação das novas formas de gestão da velhice. No entanto, a gerontologia parece ter problemas internos na sua formulação como campo de saber, que parecem comprometer sua consolidação como profissão e seu reconhecimento como disciplina científica. No presente artigo, procuramos chamar atenção para as dificuldades que a gerontologia encontra para delimitar seu campo e definir seu objeto. Sustentamos que tais dificuldades parecem derivar de uma questão central, que é a impossibilidade de serem delimitadas as fronteiras entre o normal e o patológico, na velhice. Por fim, analisamos a questão sob um ponto de vista histórico, à luz do processo de constituição do saber médico sobre o envelhecimento.Since life expectancy of Brazilian population increased and aging was considered a "social problem", there has been a boom of specialists in old age. Gerontologists and geriatricians are now playing a relevant role in setting new trends to the management of issues related to old age. However, gerontology as a field of knowledge seems to have internal questions that apparently hinder its professional consolidation and its scientific recognition. In this article, the author focus the difficulties gerontology has in order to delimitate its field of action and to define the object of its studies. The author argues that such difficulties derive from a central point: the impossibility to delimitate the frontiers between what is normal and what is pathological in old age. He also analyzes the constitution of medical knowledge on aging in a historical perspective.

  10. Occupational (? constrictive bronchiolitis with normal physical, functional and image findings

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    Sandra Figueiredo

    2009-07-01

    Full Text Available Constrictive bronchiolitis is characterized by alterations in the walls of membranous and respiratory bronchioles. These changes lead to concentric narrowing or complete obliteration of the airway lumen. Suspicion of possible bronchiolar disorders may arise from clinical, funcional, and radiologic findings. However, constrictive bronchiolitis may be present even with normal physical, functional and image findings, which turns the diagnosis difficult. A high index of suspicion is necessary to justify invasive tests that lead to pulmonary biopsy. In this report, we describe a patient with cough and dyspnoea, with normal physical, functional and image findings, whose work-up leaded to the diagnosis of constrictive bronchiolitis. Resumo: A bronquiolite constritiva é caracterizada por alterações das paredes dos bronquíolos membranosos e respiratórios. Estas alterações incluem um espectro de alterações que podem variar, desde a inflamação à fibrose concêntrica progressiva, com obstrução completa do lúmen bronquiolar. O diagnóstico pode ser sugerido pela história clínica e por alterações radiológicas e funcionais. No entanto, o exame físico e os exames complementares de diagnóstico podem ser normais, o que dificulta o diagnóstico, sendo necessário um elevado índice de suspeita para se sujeitar o doente a exames invasivos, tal como a biópsia pulmonar cirúrgica. Os autores apresentam um caso clínico de uma doente com quadro arrastado de tosse e dispneia, com exame físico, funcional e imagiológico normais, cujo estudo exaustivo veio a revelar o diagnóstico de bronquiolite constritiva. Key-words: Constrictive bronchiolitis, iron oxide, Palavras-chave: Bronquiolite constritiva, óxido de ferro

  11. Intoxicación ocupacional por mercurio

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    Augusto V Ramírez

    2008-03-01

    Full Text Available El mercurio, metal pesado ampliamente utilizado por el hombre, es muy tóxico; produce daño al sistema nervioso central, perturbaciones del comportamiento y lesiones renales. Se acumula en todos los seres vivos y no es esencial para ningún proceso biológico. La toxicidad del mercurio está directamente relacionada con su estado químico. El metilmercurio es la forma más dañina, con efectos neurotóxicos en adultos y en fetos de madres expuestas. El mercurio metálico no es menos tóxico. Las sales de mercurio inorgánico afectan directamente al riñón. Clínicamente, en la exposición ocupacional a mercurio se encuentra la triada clásica: temblor, alteración de la personalidad y estomatitis. En los últimos años se ha demostrado también alteración en la visión cromática. La exposición aguda se evalúa midiendo el mercurio en la sangre, mientras que la exposición crónica y ocupacional se determina mejor dosándolo en orina homogenizada de 24 horas. Los quelantes del metal -BAL, sus derivados o la D-penicilamina- son usados para tratar la intoxicación aguda o crónica.

  12. Histeria ainda hoje, por quê?

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    Dayse Santos Costa

    2016-04-01

    Full Text Available Resumo Estudo teórico que teve o propósito de discutir a histeria na contemporaneidade, considerando as mudanças culturais que podem ter acorrido desde a fundação da psicanálise até hoje. A discussão teve como cerne os apontamentos de Charles Melman, posto que seja um psicanalista que vem pensando a posição do sujeito nas condições da cultura ocidental atual. Foram destacados aspectos que nos conduziram a elaborar um pensamento em torno de como a neurose histérica aparece no contexto contemporâneo. Partimos do princípio de que sofremos uma mutação cultural, na qual passamos de uma cultura propensa à neurose para uma propensa à perversão. Tal concepção determina que lidamos com sujeitos que funcionam sob a ordem de uma nova economia psíquica e que em decorrência assistimos a expressão de uma histeria coletiva que, por sua vez, seria espaço de reivindicação dos sujeitos, a fim de requisitar um paradeiro e reinventar um pai que já esteja destituído.

  13. Identidad e interculturalidad: un horizonte por visitar

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    Marian Pérez Bernal

    2016-01-01

    Full Text Available En el presente trabajo mantenemos que el concepto de identidad defendido por Amin Maalouf puede ser una interesante vía para conseguir una aproximación entre las distintas culturas capaz de conducirnos a un diálogo fructífero que nos permitan gestionar la multiculturalidad actual. Defendemos que las culturas sean vistas como escenas de debate y contestación en constante proceso de construcción y reconstrucción y en las que siempre primen unos valores que nos conciernen a todos y que han de ser irrenunciables.In this paper, it is stated that the concept of identity defended by Amin Maalouf could be an interesting way to achieve a rapprochement amongst different cultures. This could lead to a fruitful dialog allowing to manage today’s multiculturalism. It is also defended that cultures should be considered as instruments of debate and reply on a continuous process of construction and reconstruction. However, cultures should not prevail over a series of values that concern to all of us and that should be inalienable.

  14. Libertad, igualdad, sostenibilidad. Por un ecofeminismo ilustrado

    Directory of Open Access Journals (Sweden)

    Puleo, Alicia H.

    2008-06-01

    Full Text Available This article presents the proposal of an enlightened Ecofeminism and defines it as an ethic-political thinking about human relations to Nature. It aims at ecojustice and sustainability, which are characterized through the criticism of prejudice, through the principles of equality and autonomy, and through the nominalist conceptualization of gender, intercultural dialogue and the sensible acceptance of science and technique. The enlightened Ecofeminism universalizes virtues such as caring for the human and non-human Nature, and defends a compassionate moral towards the radical finitude of the world.

    En este artículo se presenta la propuesta de un ecofeminismo ilustrado entendido como reflexión ético-política sobre las relaciones de los humanos con la Naturaleza. Orientado a la ecojusticia y la sostenibilidad, el ecofeminismo ilustrado se caracterizaría por la crítica al prejuicio, la defensa de los principios de igualdad y autonomía, la conceptualización nominalista del género, el diálogo intercultural, la aceptación prudente de la ciencia y la técnica, la universalización de las virtudes del cuidado aplicadas a los humanos y al resto de la Naturaleza, y una moral de la compasión frente a la radical finitud del mundo.

  15. Estudio electrofisiologico en la neuropatia por Vincristina

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    Olga P. Sanz

    1975-12-01

    Full Text Available Diez pacientes afectados por diversas patologías que requerían tratamiento crónico con Vincristina, fueron sometidos a estudios electrofisiológicos en los que se valoró: el número de unidades motoras (UM funcionantes en los músculos de la eminencia tenar, los valores de los incrementos medios de UM, velocidad de conducción motora y su latencia residual en el nervio mediano, la velocidad de conducción sensitiva del mismo nervio y el estado de la transmisión neuromuscular. Los valores obtenidos fueron comparados con grupos controles. Los resultados mostraron disminución del número de UM; las UM remanentes presentaron amplitud reducida junto a otras cuyo tamaño no superaba el del grupo control, hecho que sugiere la incapacidad de lograr una reinervación adecuada. Las velocidades de conducción motora y sensitiva mostraron valores diminuídos, con mayor compromiso en los segmentos distales. Junto a estos datos se halló respuesta miasteniforme al estímulo repetitivo. Todos estos resultados permiten postular la existencia de un compromiso de la unidad motora, abarcando todos sus segmentos, en pacientes intoxicados con Vincristina.

  16. Origen de las Escuelas Normales en el Departamento de Caldas

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    Yasaldez Eder Loaiza Zuluaga

    2016-01-01

    Full Text Available Este trabajo es resultado de la investigaci n Origen de las Escuelas Normales del Departamento de Caldas y se desarroll con base en las siguientes fases del m todo hist rico: Heur stica, Doxograf a, Etiolog a y S ntesis hist rica, con el objetivo de comprender la manera como surgieron estas instituciones las cuales son reconocidas como instituciones dedicadas a la formaci n inicial de maestros. Se puede plantear que las Escuelas Normales como formadoras de maestros para los primeros niveles de la educaci n colombiana son entidades desde las cuales es posible comprender, interpretar, caracterizar, describir SURFHVRV GH LQYHVWLJDFLyQ FLHQWt FD de orden hist rico; en tanto en estas instituciones se han delimitado objetos y problemas de estudio, que tienen RULJHQ HQ OD UH H[LyQ KLVWyULFD WHyULFD pr ctica y experiencial de su quehacer para dar cuenta de su papel en el acto educativo, el cual es su campo de acci n. Este es un estudio hist rico- educativo que se ubica entre 1909, creaci n de la primer Escuela Normal en Caldas y 1978, a o en que se aprueba el Decreto 1419 con el cual cambio la titulaci n de los egresados de las Escuelas Normales pasando de ser maestros normalista a ser Bachilleres Pedag gicos. Este estudio permite entender la forma centralizada y r gida como han sido establecidas las disposiciones y reformas para las instituciones formadoras de maestros, permite caracterizarlas como instituciones reguladas por una visi n centrada en el sistema, en la cual el Estado ejerce el control sobre los discursos y las pr cticas pedag gicas que constituyen la cultura escolar.

  17. MR guided spatial normalization of SPECT scans

    International Nuclear Information System (INIS)

    Crouch, B.; Barnden, L.R.; Kwiatek, R.

    2010-01-01

    Full text: In SPECT population studies where magnetic resonance (MR) scans are also available, the higher resolution of the MR scans allows for an improved spatial normalization of the SPECT scans. In this approach, the SPECT images are first coregistered to their corresponding MR images by a linear (affine) transformation which is calculated using SPM's mutual information maximization algorithm. Non-linear spatial normalization maps are then computed either directly from the MR scans using SPM's built in spatial normalization algorithm, or, from segmented TI MR images using DARTEL, an advanced diffeomorphism based spatial normalization algorithm. We compare these MR based methods to standard SPECT based spatial normalization for a population of 27 fibromyalgia patients and 25 healthy controls with spin echo T 1 scans. We identify significant perfusion deficits in prefrontal white matter in FM patients, with the DARTEL based spatial normalization procedure yielding stronger statistics than the standard SPECT based spatial normalization. (author)

  18. Anomalous normal mode oscillations in semiconductor microcavities

    Energy Technology Data Exchange (ETDEWEB)

    Wang, H. [Univ. of Oregon, Eugene, OR (United States). Dept. of Physics; Hou, H.Q.; Hammons, B.E. [Sandia National Labs., Albuquerque, NM (United States)

    1997-04-01

    Semiconductor microcavities as a composite exciton-cavity system can be characterized by two normal modes. Under an impulsive excitation by a short laser pulse, optical polarizations associated with the two normal modes have a {pi} phase difference. The total induced optical polarization is then expected to exhibit a sin{sup 2}({Omega}t)-like oscillation where 2{Omega} is the normal mode splitting, reflecting a coherent energy exchange between the exciton and cavity. In this paper the authors present experimental studies of normal mode oscillations using three-pulse transient four wave mixing (FWM). The result reveals surprisingly that when the cavity is tuned far below the exciton resonance, normal mode oscillation in the polarization is cos{sup 2}({Omega}t)-like, in contrast to what is expected form the simple normal mode model. This anomalous normal mode oscillation reflects the important role of virtual excitation of electronic states in semiconductor microcavities.

  19. Itinerarios Didácticos por la isla de Lanzarote

    OpenAIRE

    Becerra-Ramírez, Rafael; González Cárdenas, Elena; Gosálvez, Rafael U.; Escobar Lahoz, Estela; Dóniz-Páez, Javier

    2013-01-01

    Con la confección de esta guía de itinerarios didácticos por la isla de Lanzarote pretendemos contribuir a un mayor conocimiento de las características geográficas de este espacio dominado por las formas volcánicas que caracterizan un paisaje modificado por la mano del hombre que convive con los volcanes y los usa, tradicionalmente como soporte de sus cultivos, y modernamente como base de la industria turística. Los itinerarios didácticos por la isla de Lanzarote son la adaptación de los t...

  20. Anemia hipocrómica y microcitaria por insuficiencia de aporte inicial (Congénita

    Directory of Open Access Journals (Sweden)

    P. J. Sarmiento

    1941-07-01

    Full Text Available Todas las anemias hipocrómicas y microcitarias están caracterízadas por un síndrome hematológico común: a Son anemias simples, bilirrubinemia normal o baja: b Hipocromas, valor globular inferior a la unidad (o si se prefiere menor de 30 microgramos predominio de los microcitos, raros los macrocitos, escasa policromatofilia, poco numerosos los reticulocitos; c Son anemias hiperplásticas con hiperma-duración-mieloide; d Son anemias que mejoran con hierro.

  1. Édipo revisto por Erich Fromm

    Directory of Open Access Journals (Sweden)

    Adalberto Tripicchio

    2010-07-01

    Full Text Available

    Normal" style="text-align: justify; margin: 0cm 0cm 0pt;">O artigo apresenta a revisão de Erich Fromm a respeito do Mito de Rei Édipo e do complexo de Édipo, mostrando sua interpretação divergente da de Freud e suas críticas. A conclusão é de que a abordagem de Freud é um produto social que será superado com a instauração de uma sociedade mais humana.

  2. Correlated random sampling for multivariate normal and log-normal distributions

    International Nuclear Information System (INIS)

    Žerovnik, Gašper; Trkov, Andrej; Kodeli, Ivan A.

    2012-01-01

    A method for correlated random sampling is presented. Representative samples for multivariate normal or log-normal distribution can be produced. Furthermore, any combination of normally and log-normally distributed correlated variables may be sampled to any requested accuracy. Possible applications of the method include sampling of resonance parameters which are used for reactor calculations.

  3. Úlceras por presión causadas por dispositivos clínicos

    OpenAIRE

    Iglesias Ruisánchez, Sandra

    2017-01-01

    Las úlceras por presión (UPP) son lesiones comunes en los pacientes hospitalizados, especialmente en las unidades de cuidados intensivos (UCI). Los enfermos críticos tienen un riesgo elevado de desarrollar UPP, debido principalmente a la limitación de la movilidad, disminuyendo su capacidad para cambiar activamente su posición en la cama o asiento. Además, el efecto de fármacos anestésicos y sedantes, puede causar una pérdida de la percepción sensorial cutánea. Los diferentes dispositivos clí...

  4. Origen de la Escuela Normal Superior de México

    Directory of Open Access Journals (Sweden)

    Patricia Ducoing

    2004-01-01

    Full Text Available En este texto se pretende analizar el origen universitario de la Escuela Normal Superior de México, en el marco del período denominado “porfiriato”, el cual, pese a haberse convertido en una dictadura, enarboló los principios de la ideología liberal, los que unidos al pensamiento positivista cotidiano, posibilitaron el desarrollo económico y social y particularmente, educativo, a través de la creación de instituciones y de programas que potenciaron la conformación de un discurso pedagógico moderno. La Escuela Normal Superior nace, en el seno de la Universidad Nacional, como expresión de un proyecto político-cultural que integra las aspiraciones de la época en materia educativa: la organización y homogeneización de un sistema de formación de profesores que contribuyera a garantizar la ruptura con los postulados y símbolos del régimen colonial, los cuales habrían de ser suplantados por otros: la unidad, la cientificidad, el pragmatismo y la secularidad -entre otros-.

  5. Normal form theory and spectral sequences

    OpenAIRE

    Sanders, Jan A.

    2003-01-01

    The concept of unique normal form is formulated in terms of a spectral sequence. As an illustration of this technique some results of Baider and Churchill concerning the normal form of the anharmonic oscillator are reproduced. The aim of this paper is to show that spectral sequences give us a natural framework in which to formulate normal form theory. © 2003 Elsevier Science (USA). All rights reserved.

  6. Flora Normal, Probióticos y Salud Humana Flora Normal, Probióticos y Salud Humana

    Directory of Open Access Journals (Sweden)

    Fernando Anaya-Velázquez

    2012-02-01

    Full Text Available La microbiota es el conjunto de microorganismos que se localizan de manera normal en distintos sitios del cuerpo humano. Varios factores permiten que se mantenga el equilibrio necesario para conservar la salud. Se ha descrito que una de las funciones más importantes de la flora normal es la resistencia que confi ere a la invasión por agentes patógenos a través de diversos mecanismos como es la producción de bacteriocinas, ácido láctico o peróxido de hidrógeno entre otros. Destacan los lactobacilos (Lactobacillus casei, L. acidophilus y L. bifidus, habitantes del tracto gastrointestinal y vaginal, que inhiben el crecimiento de bacterias y virus como Salmonella y el VIH respectivamente. Los probióticos son microorganismos vivos, no patógenos, los cuales administrados en cantidades adecuadas confieren un beneficio sobre la salud del huésped. La investigación de diversas bacterias resulta alentadora debido a su uso potencial para mantener y restaurar la flora normal lo cual puede ser benéfico para la nutrición, la prevención de enfermedades y en un futuro ser parte de un tratamiento integral. The microbiota is the group of microorganisms that live normally in different parts of the human body. Several factors allow the maintenance of the required equilibrium to preserve health. It has been described that one of the most important functions of the normal flora is the resistance they confer to humans against invasion by pathogenic agents by different mechanisms such as production of bacteriocins, lactic acid or hydrogen peroxide. Among the most noticeable microorganisms are lactobacilli (Lactobacillus casei, L. acidophilus and L. bifidus, inhabitants of gastrointestinal and genital tract which inhibit the growth of pathogenic bacteria and viruses such as Salmonella and VIH, respectively. Probiotics are live microorganisms that, when administered in adequate amounts, confer a health benefit on the host. Research conducted with several

  7. Denotational Aspects of Untyped Normalization by Evaluation

    DEFF Research Database (Denmark)

    Filinski, Andrzej; Rohde, Henning Korsholm

    2005-01-01

    of soundness (the output term, if any, is in normal form and ß-equivalent to the input term); identification (ß-equivalent terms are mapped to the same result); and completeness (the function is defined for all terms that do have normal forms). We also show how the semantic construction enables a simple yet...... formal correctness proof for the normalization algorithm, expressed as a functional program in an ML-like, call-by-value language. Finally, we generalize the construction to produce an infinitary variant of normal forms, namely Böhm trees. We show that the three-part characterization of correctness...

  8. Ultrasonographic features of normal lower ureters

    International Nuclear Information System (INIS)

    Kim, Young Soon; Bae, M. Y.; Park, K. J.; Jeon, H. S.; Lee, J. H.

    1990-01-01

    Although ultrasonographic evaluation of the normal ureters is difficult due to bowel gas, the lower segment of the normal ureters can be visualized using the urinary bladder as an acoustic window. Authors prospetively performed ultrasonography with the standard suprapubic technique and analyzed the ultrasonographic features of normal lower ureters in 79 cases(77%). Length of visualized segment of the distal ureter ranged frp, 1.5cm to 7.2 cm and the visualized segment did not exceed 3.9mm in maximum diameter. Knowledge of sonographic features of the normal lower ureters can be helpful in the evaluation of pathologic or suspected pathologic conditions of the lower ureters

  9. Terapia de resgate com amiodarona em crianças com grave disfunção ventricular esquerda causada por veneno de escorpião Terapia de rescate con amiodarona en niños con severa disfunción ventricular izquierda ocasionada por veneno de escorpión Antiadrenergic rescue therapy with amiodarone in children with severe left ventricular dysfunction secondary to scorpion envenomation

    Directory of Open Access Journals (Sweden)

    Justo J. Santiago

    2010-01-01

    Full Text Available FUNDAMENTO: As crianças picadas por escorpião, pressintam ativação maciça do sistema nervoso simpática com vários graus de disfunção sistólica ventricular esquerda. OBJETIVO: Testar um protocolo de resgate em crianças com grave disfunção ventricular esquerda causada por picada de escorpião. Métodos: Quatro crianças após serem picadas por escorpião foram submetidas a: Encubação endotraqueal e suporte respiratório, eletrocardiograma, radiografia de tórax, ecocardiograma e determinação sérica da norepinefrina e troponina I. As análises foram repetidas após 12, 24 e 48 horas. As seguintes medicações intravenosas foram administradas: dobutamina 4-6 μg/kg/min; amiodarona 3 mg/kg durante duas horas, com dose de manutenção de 5 mg/kg/dia; e furosemida 0,5 mg/kg. Amiodarona, dobutamina e furosemida foram administradas durante as primeiras 48 horas. Bloqueadores beta-adrenérgicos e inibidores da enzima conversora da angiotensina foram administrados até 48 após a internação, uma vez que o estado clínico havia melhorado e a fração de ejeção ventricular esquerda encontrava-se acima de 0,35%. RESULTADOS: Na admissão, a dosagem da norepinefrina foi 1.727,50± 794,96 pg/ml, a de troponina I 24,53 ± 14,09 ng/ml e a fração de ejeção do ventrículo esquerdo foi 0,20 ± 0,056. Após 12 horas, os níveis séricos de norepinefrina e de troponina I diminuíram para a metade dos valores iniciais e a fração de ejeção aumentou para 0,32 ± 0,059. Durante as 24 e 48 horas subseqüentes, a fração de ejeção elevou-se para 0,46 ± 0,045 (pFUNDAMENTO: Los niños con picaduras de escorpión sufren activación masiva del sistema nervioso simpático con varios grados de disfunción sistólica ventricular izquierda. OBJETIVO: Probar un protocolo de rescate en niños con disfunción ventricular severa izquierda ocasionada por picadura de escorpión. MÉTODOS: Cuatro niños tras un escorpión picarlas se sometieron a: incubaci

  10. Spinal cord normalization in multiple sclerosis.

    Science.gov (United States)

    Oh, Jiwon; Seigo, Michaela; Saidha, Shiv; Sotirchos, Elias; Zackowski, Kathy; Chen, Min; Prince, Jerry; Diener-West, Marie; Calabresi, Peter A; Reich, Daniel S

    2014-01-01

    Spinal cord (SC) pathology is common in multiple sclerosis (MS), and measures of SC-atrophy are increasingly utilized. Normalization reduces biological variation of structural measurements unrelated to disease, but optimal parameters for SC volume (SCV)-normalization remain unclear. Using a variety of normalization factors and clinical measures, we assessed the effect of SCV normalization on detecting group differences and clarifying clinical-radiological correlations in MS. 3T cervical SC-MRI was performed in 133 MS cases and 11 healthy controls (HC). Clinical assessment included expanded disability status scale (EDSS), MS functional composite (MSFC), quantitative hip-flexion strength ("strength"), and vibration sensation threshold ("vibration"). SCV between C3 and C4 was measured and normalized individually by subject height, SC-length, and intracranial volume (ICV). There were group differences in raw-SCV and after normalization by height and length (MS vs. HC; progressive vs. relapsing MS-subtypes, P normalization by length (EDSS:r = -.43; MSFC:r = .33; strength:r = .38; vibration:r = -.40), and height (EDSS:r = -.26; MSFC:r = .28; strength:r = .22; vibration:r = -.29), but diminished with normalization by ICV (EDSS:r = -.23; MSFC:r = -.10; strength:r = .23; vibration:r = -.35). In relapsing MS, normalization by length allowed statistical detection of correlations that were not apparent with raw-SCV. SCV-normalization by length improves the ability to detect group differences, strengthens clinical-radiological correlations, and is particularly relevant in settings of subtle disease-related SC-atrophy in MS. SCV-normalization by length may enhance the clinical utility of measures of SC-atrophy. Copyright © 2014 by the American Society of Neuroimaging.

  11. Síndrome hepatopulmonar em paciente com cirrose por vírus C e SIDA

    Directory of Open Access Journals (Sweden)

    FERREIRA MARIA ANGÉLICA PIRES

    2001-01-01

    Full Text Available A síndrome hepatopulmonar consiste na tríade de doença hepática, dilatações vasculares intrapulmonares e hipoxemia. Não há relatos de síndrome hepatopulmonar associada com SIDA. Relatamos o caso de uma mulher de 43 anos portadora de SIDA e de cirrose hepática por hepatite C, em uso de cotrimoxazol profilático para pneumocistose e de terapia anti-retroviral, com dispnéia progressiva, cianose, baqueteamento digital, aranhas vasculares e exame do tórax normal. A radiografia do tórax mostrava infiltrado retículo-nodular, o gradiente alvéolo-arterial de oxigênio estava aumentado e a função hepática alterada. Shunt intrapulmonar foi evidenciado por ecocardiografia bidimensional transtorácica e por cintilografia pulmonar perfusional, confirmando-se a síndrome hepatopulmonar.

  12. Biopsia hepática por aspiración con la aguja de Menghini

    Directory of Open Access Journals (Sweden)

    Alberto Albornoz Plata

    1959-09-01

    Full Text Available Se hace una descripción de la técnica para obtener la biopsia hepática por aspiración utilizando la aguja de menghini y se explica qué es la aguja de menghini. Se presentan 10 casos en que se hizo la biopsia, casos comprendidos entre 4 y 63 años; 4 M. y 6 F.; se encontró en esos casos: hígado normal, 2 casos; cirrosis portal, 1 caso; cirrosis biliar, 2 casos; Tb. hepática, 1 caso; Hepatitis, 2 casos; Sífilis hepática, 1 caso; Ictericia extrahepática, 1 caso. Consideremos la punción biopsia hepática por aspiración por medio de la aguja menghini como el método más sencillo, inofensivo y práctico; en nuestra opinión la aguja de meghini es muy superior a la de Vim-Silverman, y en el futuro el método de menghini desplazará el método de Vim-Silverman, como ha ocurrido en el Hospital Mount Sinai de New York.

  13. Caracterización de leucemias agudas en adultos por citogenética convencional y FISH (hibridización in situ por fluorescencia

    Directory of Open Access Journals (Sweden)

    Gabriel Bedoya Berrío

    2000-02-01

    Full Text Available

    Normal">Introducción: En la actualidad se ha establecido el componente genético de numerosas neoplasias y en varias de ellas las alteraciones cromosómicas se reconocen como un elemento crítico en su patogénesis, modificando el funcionamiento de algunos oncogenes. En relación con las leucemias, las alteraciones citogenéticas que sirven como marcadores de las mismas, pueden presentarse tanto en el número como en la estructura cromosómica . Para detectar los cambios cromosómicos asociados con cáncer, las células afectadas deben ser analizadas por cariotipo, mediante técnicas convencionales de bandeo las cuales permiten, en la mayoría de los casos, identificar las alteraciones presentes. Sin embargo, en algunas situaciones donde no es posible identificar dichas alteraciones, es necesario emplear técnicas moleculares. La hibridizacion in situ por fluorescencia (FISH, técnica que combina la citogenética y la genética molecular, utiliza sondas de DNA marcadas con fluorocromos y sirve tanto para el estudio de alteraciones cromosómicas numéricas y estructurales, como para identificar los genes involucrados en ellas. En conclusión, el aporte más significativo de la citogenética lo constituye el haber demostrado alteraciones cromosómicas específicas en las neoplasias, las cuales son de gran utilidad para establecer un diagnóstico y un posible curso y pronóstico de la enfermedad.

    Normal">Objetivo: Analizar las alteraciones cromosómicas encontradas en pacientes adultos con diagnóstico clínico de leucemia linfoide o mieloide aguda, utilizando técnicas de citogenética clásica y molecular (FISH. Población de estudio: se analizarán las muestras de médula ósea de

  14. An atlas of normal skeletal scintigraphy

    International Nuclear Information System (INIS)

    Flanagan, J.J.; Maisey, M.N.

    1985-01-01

    This atlas was compiled to provide the neophyte as well as the experienced radiologist and the nuclear medicine physician with a reference on normal skeletal scintigraphy as an aid in distinguishing normal variations in skeletal uptake from abnormal findings. Each skeletal scintigraph is labeled, and utilizing an identical scale, a relevant skeletal photograph and radiograph are placed adjacent to the scintigraph

  15. On normal modes in classical Hamiltonian systems

    NARCIS (Netherlands)

    van Groesen, Embrecht W.C.

    1983-01-01

    Normal modes of Hamittonian systems that are even and of classical type are characterized as the critical points of a normalized kinetic energy functional on level sets of the potential energy functional. With the aid of this constrained variational formulation the existence of at least one family

  16. Computerized three-dimensional normal atlas

    International Nuclear Information System (INIS)

    Mano, Isamu; Suto, Yasuzo; Suzuki, Masataka; Iio, Masahiro.

    1990-01-01

    This paper presents our ongoing project in which normal human anatomy and its quantitative data are systematically arranged in a computer. The final product, the Computerized Three-Dimensional Normal Atlas, will be able to supply tomographic images in any direction, 3-D images, and coded information on organs, e.g., anatomical names, CT numbers, and T 1 and T 2 values. (author)

  17. Pseudo--Normals for Signed Distance Computation

    DEFF Research Database (Denmark)

    Aanæs, Henrik; Bærentzen, Jakob Andreas

    2003-01-01

    the relation of a point to a mesh. At the vertices and edges of a triangle mesh, the surface is not \\$C\\^1\\$ continuous. Hence, the normal is undefined at these loci. Thürmer and Wüthrich proposed the \\$\\backslash\\$emph{angle weighted pseudo--normal} as a way to deal with this problem. In this paper, we...

  18. The lambda sigma calculus and strong normalization

    DEFF Research Database (Denmark)

    Schack-Nielsen, Anders; Schürmann, Carsten

    Explicit substitution calculi can be classified into several dis- tinct categories depending on whether they are confluent, meta-confluent, strong normalization preserving, strongly normalizing, simulating, fully compositional, and/or local. In this paper we present a variant of the λσ-calculus, ...

  19. Las Escuelas Normales universitarias y el problema educativo en Michoacán, 1917-1930

    Directory of Open Access Journals (Sweden)

    Miguel Ángel Gutiérrez López

    2016-01-01

    Full Text Available Las escuelas normales formaron parte del proyecto inicial de Universidad en Michoacán. Las escuelas normales se crearon en 1915 y partir de 1917 se integraron a la Universidad Michoacana, donde permanecieron hasta 1930. Su existencia enfrentó problemas derivados de la violencia y la inestabilidad política del momento. Además de la crisis económica por la que atravesaba el estado, la Universidad y las escuelas normales realizaron sus actividades en una sociedad que enfrentaba un grave rezago educativo heredado del siglo XIX. Sin embargo, a pesar de las dificultades, estas instituciones y sus miembros asumieron la responsabilidad de formar a los profesores de educación básica que tratarían de cambiar la realidad social a partir de la alfabetización. En este artículo se hace un recuento histórico del papel desempeñado por las escuelas normales dentro del proyecto inicial de la Universidad Michoacana. Se hace referencia al establecimiento de esta institución y al lugar que ocupó la enseñanza normal, en un contexto de crisis social derivado de la agitación política de la época. También se hace alusión a los problemas educativos y al papel que ante éstos se asignó a las escuelas normales. A la par de estas referencias institucionales y del contexto social, se muestran algunos elementos para entender las características de la organización y funcionamiento académico de las escuelas normales.

  20. Mujeres por la utilidad de la virtud

    Directory of Open Access Journals (Sweden)

    Nancy Rodríguez Pupo

    2014-08-01

    Full Text Available La mujer cubana ostenta una vasta tradición combativa y es ejemplo de entereza, abnegación, sacrificio y compromiso social. Quien se acerque a la historia de nuestro proceso nacional-liberador a todo lo largo de su devenir, constatará su presencia como forjadoras de la nación. Integrante fundamental de la sociedad, la mujer hizo suyas las ansias libertadoras y desempeñó un rol importante en aras de crear una patria común. Se trata de entender que en lo más mínimo su papel fue de “retaguardia”, sino todo lo contrario, su trabajo fue necesario y en no pocas ocasiones empuñó las armas y con valentía gritó ¡viva Cuba libre!, incluso a cambio de su vida, como lo protagonizó la tunera Mercedes Varona. El ejemplo de la mujer cubana y particularmente tunera, es imperecedero en su doble función de ser social y generadora de nuevas vidas, con amplias posibilidades de realización personal y profesional luego de 1959. Su actuación se manifiesta en cada actividad del sector de la salud pública como médica, enfermera, técnica, profesora y estomatóloga, así como también en otros puestos de trabajo no menos necesarios. Ellas con altruismo, solidaridad, responsabilidad y humanismo, son continuadoras de las mejores tradiciones científicas, patrióticas y revolucionarias de nuestro pueblo. Esta edición se dedica al 8 de marzo, día internacional de la mujer, las homenajeamos y recordamos la obra de Laura Martínez Carvajal, primera médica cubana, quien desafió los prejuicios de su época o Isabel Rubio que puso sus conocimientos de medicina farmacéutica al servicio del Ejército Libertador, en el que alcanzó los grados de capitana de sanidad; por citar dos entre las grandes. Otras féminas de la localidad ejercieron en la manigua sus dotes de parteras o enfermeras, tal el caso de Anita Cruz, magnífica artillera, quien estuvo al frente de un hospital de campaña durante la guerra. Allí curó heridas, infecciones, disenter

  1. a Recursive Approach to Compute Normal Forms

    Science.gov (United States)

    HSU, L.; MIN, L. J.; FAVRETTO, L.

    2001-06-01

    Normal forms are instrumental in the analysis of dynamical systems described by ordinary differential equations, particularly when singularities close to a bifurcation are to be characterized. However, the computation of a normal form up to an arbitrary order is numerically hard. This paper focuses on the computer programming of some recursive formulas developed earlier to compute higher order normal forms. A computer program to reduce the system to its normal form on a center manifold is developed using the Maple symbolic language. However, it should be stressed that the program relies essentially on recursive numerical computations, while symbolic calculations are used only for minor tasks. Some strategies are proposed to save computation time. Examples are presented to illustrate the application of the program to obtain high order normalization or to handle systems with large dimension.

  2. Normal zone soliton in large composite superconductors

    International Nuclear Information System (INIS)

    Kupferman, R.; Mints, R.G.; Ben-Jacob, E.

    1992-01-01

    The study of normal zone of finite size (normal domains) in superconductors, has been continuously a subject of interest in the field of applied superconductivity. It was shown that in homogeneous superconductors normal domains are always unstable, so that if a normal domain nucleates, it will either expand or shrink. While testing the stability of large cryostable composite superconductors, a new phenomena was found, the existence of stable propagating normal solitons. The formation of these propagating domains was shown to be a result of the high Joule power generated in the superconductor during the relatively long process of current redistribution between the superconductor and the stabilizer. Theoretical studies were performed in investigate the propagation of normal domains in large composite super conductors in the cryostable regime. Huang and Eyssa performed numerical calculations simulating the diffusion of heat and current redistribution in the conductor, and showed the existence of stable propagating normal domains. They compared the velocity of normal domain propagation with the experimental data, obtaining a reasonable agreement. Dresner presented an analytical method to solve this problem if the time dependence of the Joule power is given. He performed explicit calculations of normal domain velocity assuming that the Joule power decays exponentially during the process of current redistribution. In this paper, the authors propose a system of two one-dimensional diffusion equations describing the dynamics of the temperature and the current density distributions along the conductor. Numerical simulations of the equations reconfirm the existence of propagating domains in the cryostable regime, while an analytical investigation supplies an explicit formula for the velocity of the normal domain

  3. Impacto do manejo da água na toxidez por ferro no arroz irrigado por alagamento

    Directory of Open Access Journals (Sweden)

    Fabiana Schmidt

    2013-10-01

    Full Text Available A toxidez por ferro é o distúrbio nutricional de maior ocorrência em arroz (Oryza sativa L. cultivado em sistemas alagados, derivada da quantidade excessiva de íons ferrosos (Fe2+ gerados pela redução de óxidos de ferro em solos alagados. Em experimento conduzido em casa de vegetação, foram avaliados os efeitos de manejos da água de irrigação na dinâmica de redução de um Planossolo e na manifestação da toxidez por ferro em arroz. Os tratamentos dispostos em blocos completos ao acaso com quatro repetições constaram de cinco manejos da água: T1- início do alagamento no estádio V2-V3 do arroz; T2- início do alagamento no estádio V6-V7; T3- T1 e drenagem no estádio V10-V11; T4- T2 e drenagem no estádio V10-V11; e T5- T1 e drenagens nos estádios V7-V8 e V10-V11. O atraso do início do alagamento para o estádio V6-V7 do arroz manteve os valores do Eh da solução do solo mais elevados, promovendo menor disponibilidade de Fe2+ na solução do solo e deslocando a máxima liberação de Fe2+ na solução do solo para estádios fenológicos mais avançados do arroz. A realização de drenagens ao longo do ciclo vegetativo do arroz promoveu a reoxidação do solo, que ocasionou o aumento dos valores de Eh e redução da concentração de Fe2+ na solução do solo. O uso de drenagens durante o período vegetativo do arroz foi eficiente no controle da toxidez por excesso de ferro, em arroz cultivado em solo alagado.

  4. Ansiedad percibida por los pacientes hospitalizados por quemaduras, en una Unidad de Quemados

    Directory of Open Access Journals (Sweden)

    M. Alcázar-Gabás

    2014-06-01

    Full Text Available El presente trabajo, pretende describir el estado de ansiedad que experimentan los pacientes ingresados en una Unidad de Quemados. Uno de los factores clave en los cuidados del paciente quemado es una buena atención psicológica. La realidad demuestra que es el profesional de enfermería quien observa los síntomas emocionales durante los primeros días de ingreso y trata de responder a esa demanda de cuidado. Pretendemos, a través de la medición del nivel de ansiedad que perciben los pacientes ingresados en la Unidad de Quemados elegida para nuestro estudio durante el primer semestre del año 2009, identificar a aquellos que estén en riesgo de padecer mayores niveles de ansiedad durante su hospitalización, para así poder establecer un plan de cuidados adaptado a las necesidades emocionales de cada uno. Los resultados obtenidos nos permiten concluir que los pacientes quemados ingresados en la Unidad de Quemados presentaron niveles elevados de ansiedad que son superiores entre la población femenina, así como en aquellos pacientes con lesiones de mayor extensión. Determinamos también que los pacientes ingresados por quemaduras en la Unidad de Quemados a estudio fueron mayoritariamente varones, de nacionalidad española, residentes en medio urbano con una media de edad de 50 años, siendo las quemaduras producidas por llama en accidentes domésticos la causa más frecuente.

  5. Escenarios de costos generados por el uso del costeo variable

    OpenAIRE

    Zea Lourido, Felipe

    2013-01-01

    Este trabajo demuestra cómo el costeo absorbente, considerado por expertos en la materia, uno de los métodos de costeo usado frecuentemente por las organizaciones, con el propósito de determinar el valor de los inventarios y del costo de productos vendidos que intervienen en el estado de resultados para usuarios externos (stakeholders), al compararlo con el costeo variable, preferido por algunos administradores para toma de decisiones internas y usado en la preparación del estado de resultado...

  6. Itinerarios didácticos por la isla de Tenerife

    OpenAIRE

    Becerra Ramírez, María Carmen; Javier Dóniz-Páez; González Cárdenas, Elena; Gosálvez, Rafael U.; Becerra-Ramírez, Rafael; Escobar Lahoz, Estela

    2013-01-01

    Con la elaboración de esta guía de Itinerarios Didácticos por la isla de Tenerife pretendemos contribuir a un mayor conocimiento de las características geográficas de un espacio dominado por las formas y formaciones volcánicas que caracterizan un paisaje fuertemente modificado por la actividad humana. El hombre convive y usa lo que los volcanes le ofrecen, tradicionalmente como soporte de sus cultivos o de su actividad ganadera,y modernamente como base de la industria turística. Los itiner...

  7. Topoplastia de Cvintal assistida por laser de femtossegundo

    Directory of Open Access Journals (Sweden)

    Alexandre Takayoshi Ishizaki

    2013-06-01

    Full Text Available Apresentamos um relato de astigmatismo tardio progressivo pós-transplante de córnea para ceratocone, associado à afinamento periférico na junção doador-receptor, o que presumidamente pode ser considerado como recorrência da ectasia. O caso foi tratado por meio de Topoplastia de Cvintal assistida por laser de femtossegundo para a confecção da incisão com geometria "top hat", seguido de sutura com ajuste per-operatório guiado por ceratoscopia.

  8. Selección de Recursos Humanos por Competencias

    OpenAIRE

    Sánchez Domingo, Cristina

    2013-01-01

    Los objetivos de este trabajo son, por un lado conocer en qué consisten los procesos de valoración y selección de personas desde el enfoque de las competencias laborales. Para ello, ha sido preciso profundizar en el estudio del concepto de “competencia laboral”, y comprender qué es la Gestión de Recursos Humanos por Competencias, en cuyo seno se encuentra la propia Selección de Recursos Humanos. Por otra parte, un segundo objetivo del trabajo es conocer el grado de implantación de la Selecció...

  9. Orlando Castellanos. La pasión por la radio

    OpenAIRE

    Castellanos Molina, Orlando, 1930-1998

    2004-01-01

    Documento sonoro en el que se recogen entrevistas realizadas a Orlando Castellanos por Miguel Ángel de la Guardia, Miladys Ochoa, Fernando Rodríguez Sánchez (Ciego de Ávila), Ángel Ferrera, Boshmonar, Jaime Almiral, Radio Umbral de Santiago de Chile, Franco Carbón, Luis Toledo Sande y Estrella Díaz. Esta grabación pertenece a la colección Palabra Viva, desarrollada por el Centro Cultural Pablo de la Torriente Brau, a partir de las entrevistas realizadas por el periodista Orlando Castellanos. ...

  10. Strength of Gamma Rhythm Depends on Normalization

    Science.gov (United States)

    Ray, Supratim; Ni, Amy M.; Maunsell, John H. R.

    2013-01-01

    Neuronal assemblies often exhibit stimulus-induced rhythmic activity in the gamma range (30–80 Hz), whose magnitude depends on the attentional load. This has led to the suggestion that gamma rhythms form dynamic communication channels across cortical areas processing the features of behaviorally relevant stimuli. Recently, attention has been linked to a normalization mechanism, in which the response of a neuron is suppressed (normalized) by the overall activity of a large pool of neighboring neurons. In this model, attention increases the excitatory drive received by the neuron, which in turn also increases the strength of normalization, thereby changing the balance of excitation and inhibition. Recent studies have shown that gamma power also depends on such excitatory–inhibitory interactions. Could modulation in gamma power during an attention task be a reflection of the changes in the underlying excitation–inhibition interactions? By manipulating the normalization strength independent of attentional load in macaque monkeys, we show that gamma power increases with increasing normalization, even when the attentional load is fixed. Further, manipulations of attention that increase normalization increase gamma power, even when they decrease the firing rate. Thus, gamma rhythms could be a reflection of changes in the relative strengths of excitation and normalization rather than playing a functional role in communication or control. PMID:23393427

  11. MR imaging of the ankle: Normal variants

    International Nuclear Information System (INIS)

    Noto, A.M.; Cheung, Y.; Rosenberg, Z.S.; Norman, A.; Leeds, N.E.

    1987-01-01

    Thirty asymptomatic ankles were studied with high-resolution surface coil MR imaging. The thirty ankles were reviewed for identification or normal structures. The MR appearance of the deltoid and posterior to talo-fibular ligaments, peroneous brevis and longus tendons, and posterior aspect of the tibial-talar joint demonstrated several normal variants not previously described. These should not be misinterpreted as pathologic processes. The specific findings included (1) cortical irregularity of the posterior tibial-talar joint in 27 of 30 cases which should not be mistaken for osteonecrois; (2) normal posterior talo-fibular ligament with irregular and frayed inhomogeneity, which represents a normal variant in seven of ten cases; and (3) fluid in the shared peroneal tendons sheath which may be confused for a longitudinal tendon tear in three of 30 cases. Ankle imaging with the use of MR is still a relatively new procedure. Further investigation is needed to better define normal anatomy as well as normal variants. The authors described several structures that normally present with variable MR imaging appearances. This is clinically significant in order to maintain a high sensitivity and specificity in MR imaging interpretation

  12. Defecography: A study of normal volunteers

    International Nuclear Information System (INIS)

    Shorvon, P.; Stevenson, G.W.; McHugh, S.; Somers, P.

    1987-01-01

    This study of young volunteers was set up in an effort to establish true normal measurements for defecography with minimum selection bias. The results describe the mean (and the range) for the following: anorectal angle; anorectal junction position at rest; excursion on lift, strain, and evacuation; anal canal length and degree of closure; and the frequency and degree of features such as rectocele and intussusception which have previously been called abnormalities. The results indicate that there is a very wide range of normal appearances. Knowledge of these normal variations is important to avoid overreporting and unnecessary surgery

  13. Nonlinear dynamics exploration through normal forms

    CERN Document Server

    Kahn, Peter B

    2014-01-01

    Geared toward advanced undergraduates and graduate students, this exposition covers the method of normal forms and its application to ordinary differential equations through perturbation analysis. In addition to its emphasis on the freedom inherent in the normal form expansion, the text features numerous examples of equations, the kind of which are encountered in many areas of science and engineering. The treatment begins with an introduction to the basic concepts underlying the normal forms. Coverage then shifts to an investigation of systems with one degree of freedom that model oscillations

  14. Normal-dispersion microresonator Kerr frequency combs

    Directory of Open Access Journals (Sweden)

    Xue Xiaoxiao

    2016-06-01

    Full Text Available Optical microresonator-based Kerr frequency comb generation has developed into a hot research area in the past decade. Microresonator combs are promising for portable applications due to their potential for chip-level integration and low power consumption. According to the group velocity dispersion of the microresonator employed, research in this field may be classified into two categories: the anomalous dispersion regime and the normal dispersion regime. In this paper, we discuss the physics of Kerr comb generation in the normal dispersion regime and review recent experimental advances. The potential advantages and future directions of normal dispersion combs are also discussed.

  15. Normal radiographic findings. 4. act. ed.

    International Nuclear Information System (INIS)

    Moeller, T.B.

    2003-01-01

    This book can serve the reader in three ways: First, it presents normal findings for all radiographic techniques including KM. Important data which are criteria of normal findings are indicated directly in the pictures and are also explained in full text and in summary form. Secondly, it teaches the systematics of interpreting a picture - how to look at it, what structures to regard in what order, and for what to look in particular. Checklists are presented in each case. Thirdly, findings are formulated in accordance with the image analysis procedure. All criteria of normal findings are defined in these formulations, which make them an important didactic element. (orig.)

  16. Normal radiographic findings. 4. act. ed.; Roentgennormalbefunde

    Energy Technology Data Exchange (ETDEWEB)

    Moeller, T.B. [Gemeinschaftspraxis fuer Radiologie und Nuklearmedizin, Dillingen (Germany)

    2003-07-01

    This book can serve the reader in three ways: First, it presents normal findings for all radiographic techniques including KM. Important data which are criteria of normal findings are indicated directly in the pictures and are also explained in full text and in summary form. Secondly, it teaches the systematics of interpreting a picture - how to look at it, what structures to regard in what order, and for what to look in particular. Checklists are presented in each case. Thirdly, findings are formulated in accordance with the image analysis procedure. All criteria of normal findings are defined in these formulations, which make them an important didactic element. (orig.)

  17. Caso Clínico ARP Nº9: Cardiomiopatia Hipertrofica e Cardiopatia Isquémica

    OpenAIRE

    Marques, Hugo

    2017-01-01

    Caso 1 / A70 anosEcg com alterações da repolarização ventricularEcocardiograma com má janela.Queixas de precordialgia atípica.Cardiomiopatia hipertrofica apical com aneurisma apical (burn out ápex). A HCM apical é difícil de diagnosticas por ecocardiograma. Alterações da repolarização são frequentes.Caso 2 / B55 anosInternamento há 2 meses com dor precordial, ligeiro aumento das troponinas e discinésia ventricular esquerda apical. Fez cateterismo com coronarias normais.Por ausência de recuper...

  18. Imaging the corpus callosum, septum pellucidum and fornix in children: normal anatomy and variations of normality

    International Nuclear Information System (INIS)

    Griffiths, Paul D.; Batty, Ruth; Connolly, Dan J.A.; Reeves, Michael J.

    2009-01-01

    The midline structures of the supra-tentorial brain are important landmarks for judging if the brain has formed correctly. In this article, we consider the normal appearances of the corpus callosum, septum pellucidum and fornix as shown on MR imaging in normal and near-normal states. (orig.)

  19. Realidades e controvérsias em relação ao conceito psicanalítico de autismo normal

    Directory of Open Access Journals (Sweden)

    Maria Izabel Tafuri

    2003-12-01

    Full Text Available Neste trabalho discute-se a evolução do pensamento psicanalítico a partir da noção de autismo normal e sua posterior refutação, feita por Tustin, em 1991. A proposta de refutação pode ser vista como perpetuação de outro erro: a imprecisão conceitual criada por Mahler desde a definição original do termo. Tustin restringiu, à moda de Mahler, a noção de satisfação autística do lactente na “casca do ovo” à de autismo normal.Dessa forma, a refutação do autismo normal recai na mesma problemáticagerada por Bleuler e Kanner: a subtração de Eros do conceito de auto-erotismo.

  20. Elasticidad precio de la demanda por autopistas interurbanas en Chile

    Directory of Open Access Journals (Sweden)

    Rodrigo Sanes

    2013-01-01

    transporte depende de la información que se disponga respecto a la elasticidad precio de la demanda por el uso de puentes, túneles y carreteras. El objetivo de este trabajo es estimar la elasticidad precio de la demanda por el uso de autopistas interurbanas en Chile utilizando el método de regresiones aparentemente no relacionadas (SUR y un panel de 48 datos mensuales obtenidos a partir de 21 plazas de peajes (48 x 21. Nuestros resultados muestran que, aún controlando por el precio de la gasolina y el nivel de actividad económica, la demanda por el uso de carreteras resulta ser muy inelástica al precio del peaje, con valores que oscilan entre -0,17 para automóviles y -0,05 para camiones.

  1. Elasticidad precio de la demanda por autopistas interurbanas en Chile

    Directory of Open Access Journals (Sweden)

    Rodrigo Saens

    2013-07-01

    Full Text Available La efectividad de un esquema de tarificación vial para optimizar el uso de infraestructura de transporte depende de la información que se disponga respecto a la elasticidad precio de la demanda por el uso de puentes, túneles y carreteras. El objetivo de este trabajo es estimar la elasticidad precio de la demanda por el uso de autopistas interurbanas en Chile utilizando el método de regresiones aparentemente no relacionadas (SUR y un panel de 48 datos mensuales obtenidos a partir de 21 plazas de peajes (48 x 21. Nuestros resultados muestran que, aún controlando por el precio de la gasolina y el nivel de actividad económica, la demanda por el uso de carreteras resulta ser muy inelástica al precio del peaje, con valores que oscilan entre -0,17 para automóviles y -0,05 para camiones.

  2. Osteoporosis secundaria y Osteoporosis inducida por glucocorticoides (OIG

    Directory of Open Access Journals (Sweden)

    Elías Forero Illera

    2006-01-01

    Full Text Available La osteoporosis es un problema de salud pública importante a nivel mundial, y su prevalencia está aumentando. La osteoporosis secundaria se puede producir por varias patologías y el uso de ciertos medicamentos. Los glucocorticoides son un grupo de fármacos usados extensamente en la práctica médica debido a su indiscutible utilidad. La osteoporosis inducida por glucocorticoides es un problema de salud pública. Aunque la patogénesis de la pérdida producida por los glucocorticoides en el hueso no se conoce totalmente, investigaciones recientes han proporcionado nuevas conocimientos en los mecanismos de estos fármacos a nivel celular y molecular. Diversas guías han sido propuestas por diversos grupos para el tratamiento de la OIG; desafortunadamente, las guías del tratamiento no se utilizan adecuadamente en los pacientes.

  3. Higiene mental: conferencia dictada por la Radiodifusora Nacional

    Directory of Open Access Journals (Sweden)

    Francisco Gómez Pinzón

    1941-01-01

    tiene extraordinaria trascendencia para el país por sus vastas repercusiones sobre el futuro de nuestro pueblo, y que, sin embargo ha sido negligentemente olvidado por las autoridades y deliberadamente ignorado por los sectores cultos e ilustrados de nuestra sociedad. Me refería entonces a la curva ascendente que, no sólo entre nosotros sino en todos los países civilizados, han seguido en su propagación las enfermedades nerviosas y mentales, y que hace contraste con la disminución progresiva de las demás afecciones y en especial de las infecto-contagiosas, que están a punto de ser dominadas por la técnica cada día más perfecta de la medicina preventiva. Hoy quiero ocuparme de algunos aspectos de este mismo tema que apenas alcanzaron a ser esbozados en mi conferencia anterior.

  4. San Sebastian, vista por Paret y Alcázar

    Directory of Open Access Journals (Sweden)

    María Castilla Albisu

    2013-07-01

    Full Text Available Luis Paret y Alcázar pintó una serie de vistas panorámicas de puertos del litoral Cantábrico, por encargo del rey Carlos III. El objetivo de este trabajo es ahondar en la vida de este pintor para así comprender mejor su obra. A pesar de los estudios realizados por algunos historiadores quedan todavía incógnitas por descubrir relativas a la vida y al trabajo de este artista. Al acercarse a la figura de Paret y Alcázar hay que preguntarse por qué habiendo sido uno de los pintores más prometedores de su tiempo, su figura ha caído en un triste olvido.

  5. Polución por material particulado fino (PM 2,5) incrementa las hospitalizaciones por insuficiencia cardiaca

    OpenAIRE

    Castro, Pablo; Vera, Jeanette; Cifuentes, Luis; Wellenius, Gregory; Verdejo, Hugo; Sepúlveda, Luis; Vukasovic, José Luis; Llevaneras, Silvana

    2010-01-01

    Antecedentes: Estudios recientes han reportado una asociación entre la contaminación ambiental por material particulado (PM) y el riesgo de hospitalizaciones de pacientes con insuficiencia cardiaca (IC). La región metropolitana de nuestro país constituye un área geográfica en la cual la contaminación es especialmente relevante, asociándose a incrementos periódicos en la morbimortalidad por causa respiratoria. Sin embargo el efecto de la polución por PM en la morbilidad de pacientes con IC no ...

  6. CARACTERÍSTICAS DA VIOLÊNCIA SEXUAL SOFRIDA POR CRIANÇAS ASSISTIDAS POR UM PROGRAMA DE APOIO

    OpenAIRE

    KELLY LINHARES VASCONCELOS; ADRIANA GOMES NOGUEIRA FERREIRA; ELIANY NAZARÉ OLIVEIRA; DANIELLE D\\u2019ÁVILA SIQUEIRA; PATRÍCIA NEYVA DA COSTA PINHEIRO

    2010-01-01

    En Brasil, las estadísticas de la violencia sexual contra niños están lejos de reflejar la verdadera realidad actual debido a la baja notificación de los casos. La finalidad de este estudio fue caracterizar el abuso sexual sufrido por niños asistidos por el Programa Sentinela y el perfil del agresor, en Sobral-Ceará, en el periodo que va del 2002 al 2006. La muestra no probabilística intencional fue compuesta por 50 víctimas de abuso sexual y de las mismas, el 66% es del sexo femenino, con pr...

  7. Using the Bologna Score to assess normal delivery healthcare.

    Science.gov (United States)

    Carvalho, Isaiane da Silva; Brito, Rosineide Santana de

    2016-01-01

    Describing the obstetric care provided in public maternity hospitals during normal labour using the Bologna Score in the city of Natal, Northeastern Brazil. A quantitative cross-sectional study conducted with 314 puerperal women. Data collection was carried out consecutively during the months of March to July 2014. Prenatal care was provided to 95.9% of the mothers, beginning around the 1st trimester of pregnancy (72.3%) and having seven or more consultations (51%). Spontaneous vaginal delivery was planned for 88.2% women. All laboring women were assisted by a health professional, mostly by a physician (80.6%), and none of them obtained 5 points on the Bologna Score due to the small percentage of births in non-supine position (0.3%) and absence of a partogram (2.2%). A higher number of episiotomies were observed among primiparous women (75.5%). The score obtained using the Bologna Index was low. Thus, it is necessary to improve and readjust the existing obstetrical model. Descrever a assistência obstétrica prestada em maternidades públicas municipais durante o parto normal na cidade de Natal, Nordeste do Brasil, com uso do Índice de Bologna. Estudo transversal com abordagem quantitativa, desenvolvido com 314 puérperas. A coleta de dados processou-se de forma consecutiva durante os meses de março a julho de 2014. A assistência pré-natal foi prestada a 95,9% das puérperas, com início em torno do 1º trimestre de gestação (72,3%) e realização de sete ou mais consultas (51%). O parto vaginal espontâneo foi planejado para 88,2% mulheres. Todas as parturientes foram assistidas por um profissional de saúde, especialmente pelo médico (80,6%) e nenhuma obteve 5 pontos no Índice de Bologna em virtude dos baixos percentuais de partos em posição não supina (0,3%) e ausência do partograma (2,2%). Houve maior número de episiotomias em primíparas (75,5%). A pontuação obtida por meio do Índice de Bologna foi baixa. Desse modo, é preciso melhorar e

  8. The total plasmatic estriol on normal gestation

    International Nuclear Information System (INIS)

    Thiesen, A.L.

    1980-01-01

    The total plasmatic estriol in normal pregnants was determinated by radioimmunological method using estriol labelled with sup(125)I. The obtained results presented similar results in comparison with methods using sup(19)C and sup(3)H. (author)

  9. Terre Haute and the Normal School Fire

    Science.gov (United States)

    Ferreira, Allen

    1974-01-01

    This paper examines the short history of the Terre Haute Normal School before its tragic burning on April 9, 1888 and relates that story to the course of events immediately following the fire. (Author)

  10. Looking at Your Newborn: What's Normal

    Science.gov (United States)

    ... features that may make a normal newborn look strange are temporary. After all, babies develop while immersed ... sleepy during the first day or two of life. Many new parents become concerned about their newborn's ...

  11. Mental Health: What's Normal, What's Not?

    Science.gov (United States)

    Healthy Lifestyle Adult health Understanding what's considered normal mental health can be tricky. See how feelings, thoughts and behaviors determine mental health and how to recognize if you or a ...

  12. Compressed normalized block difference for object tracking

    Science.gov (United States)

    Gao, Yun; Zhang, Dengzhuo; Cai, Donglan; Zhou, Hao; Lan, Ge

    2018-04-01

    Feature extraction is very important for robust and real-time tracking. Compressive sensing provided a technical support for real-time feature extraction. However, all existing compressive tracking were based on compressed Haar-like feature, and how to compress many more excellent high-dimensional features is worth researching. In this paper, a novel compressed normalized block difference feature (CNBD) was proposed. For resisting noise effectively in a highdimensional normalized pixel difference feature (NPD), a normalized block difference feature extends two pixels in the original formula of NPD to two blocks. A CNBD feature can be obtained by compressing a normalized block difference feature based on compressive sensing theory, with the sparse random Gaussian matrix as the measurement matrix. The comparative experiments of 7 trackers on 20 challenging sequences showed that the tracker based on CNBD feature can perform better than other trackers, especially than FCT tracker based on compressed Haar-like feature, in terms of AUC, SR and Precision.

  13. Forced Normalization: Antagonism Between Epilepsy and Psychosis.

    Science.gov (United States)

    Kawakami, Yasuhiko; Itoh, Yasuhiko

    2017-05-01

    The antagonism between epilepsy and psychosis has been discussed for a long time. Landolt coined the term "forced normalization" in the 1950s to describe psychotic episodes associated with the remission of seizures and disappearance of epileptiform activity on electroencephalograms in individuals with epilepsy. Since then, neurologists and psychiatrists have been intrigued by this phenomenon. However, although collaborative clinical studies and basic experimental researches have been performed, the mechanism of forced normalization remains unknown. In this review article, we present a historical overview of the concept of forced normalization, and discuss potential pathogenic mechanisms and clinical diagnosis. We also discuss the role of dopamine, which appears to be a key factor in the mechanism of forced normalization. Copyright © 2017 Elsevier Inc. All rights reserved.

  14. Efficient CEPSTRAL Normalization for Robust Speech Recognition

    National Research Council Canada - National Science Library

    Liu, Fu-Hua; Stern, Richard M; Huang, Xuedong; Acero, Alejandro

    1993-01-01

    .... We compare the performance of these algorithms with the very simple RASTA and cepstral mean normalization procedures, describing the performance of these algorithms in the context of the 1992 DARPA...

  15. Normal and Abnormal Behavior in Early Childhood

    OpenAIRE

    Spinner, Miriam R.

    1981-01-01

    Evaluation of normal and abnormal behavior in the period to three years of age involves many variables. Parental attitudes, determined by many factors such as previous childrearing experience, the bonding process, parental psychological status and parental temperament, often influence the labeling of behavior as normal or abnormal. This article describes the forms of crying, sleep and wakefulness, and affective responses from infancy to three years of age.

  16. Right thoracic curvature in the normal spine

    Directory of Open Access Journals (Sweden)

    Masuda Keigo

    2011-01-01

    Full Text Available Abstract Background Trunk asymmetry and vertebral rotation, at times observed in the normal spine, resemble the characteristics of adolescent idiopathic scoliosis (AIS. Right thoracic curvature has also been reported in the normal spine. If it is determined that the features of right thoracic side curvature in the normal spine are the same as those observed in AIS, these findings might provide a basis for elucidating the etiology of this condition. For this reason, we investigated right thoracic curvature in the normal spine. Methods For normal spinal measurements, 1,200 patients who underwent a posteroanterior chest radiographs were evaluated. These consisted of 400 children (ages 4-9, 400 adolescents (ages 10-19 and 400 adults (ages 20-29, with each group comprised of both genders. The exclusion criteria were obvious chest and spinal diseases. As side curvature is minimal in normal spines and the range at which curvature is measured is difficult to ascertain, first the typical curvature range in scoliosis patients was determined and then the Cobb angle in normal spines was measured using the same range as the scoliosis curve, from T5 to T12. Right thoracic curvature was given a positive value. The curve pattern was organized in each collective three groups: neutral (from -1 degree to 1 degree, right (> +1 degree, and left ( Results In child group, Cobb angle in left was 120, in neutral was 125 and in right was 155. In adolescent group, Cobb angle in left was 70, in neutral was 114 and in right was 216. In adult group, Cobb angle in left was 46, in neutral was 102 and in right was 252. The curvature pattern shifts to the right side in the adolescent group (p Conclusions Based on standing chest radiographic measurements, a right thoracic curvature was observed in normal spines after adolescence.

  17. Advancing Normal Birth: Organizations, Goals, and Research

    OpenAIRE

    Hotelling, Barbara A.; Humenick, Sharron S.

    2005-01-01

    In this column, the support for advancing normal birth is summarized, based on a comparison of the goals of Healthy People 2010, Lamaze International, the Coalition for Improving Maternity Services, and the midwifery model of care. Research abstracts are presented to provide evidence that the midwifery model of care safely and economically advances normal birth. Rates of intervention experienced, as reported in the Listening to Mothers survey, are compared to the forms of care recommended by ...

  18. Distinguishing hyperhidrosis and normal physiological sweat production

    DEFF Research Database (Denmark)

    Thorlacius, Linnea; Gyldenløve, Mette; Zachariae, Claus

    2015-01-01

    of this study was to establish reference intervals for normal physiological axillary and palmar sweat production. METHODS: Gravimetric testing was performed in 75 healthy control subjects. Subsequently, these results were compared with findings in a cohort of patients with hyperhidrosis and with the results...... 100 mg/5 min. CONCLUSIONS: A sweat production rate of 100 mg/5 min as measured by gravimetric testing may be a reasonable cut-off value for distinguishing axillary and palmar hyperhidrosis from normal physiological sweat production....

  19. Normalization based K means Clustering Algorithm

    OpenAIRE

    Virmani, Deepali; Taneja, Shweta; Malhotra, Geetika

    2015-01-01

    K-means is an effective clustering technique used to separate similar data into groups based on initial centroids of clusters. In this paper, Normalization based K-means clustering algorithm(N-K means) is proposed. Proposed N-K means clustering algorithm applies normalization prior to clustering on the available data as well as the proposed approach calculates initial centroids based on weights. Experimental results prove the betterment of proposed N-K means clustering algorithm over existing...

  20. Sampling from the normal and exponential distributions

    International Nuclear Information System (INIS)

    Chaplin, K.R.; Wills, C.A.

    1982-01-01

    Methods for generating random numbers from the normal and exponential distributions are described. These involve dividing each function into subregions, and for each of these developing a method of sampling usually based on an acceptance rejection technique. When sampling from the normal or exponential distribution, each subregion provides the required random value with probability equal to the ratio of its area to the total area. Procedures written in FORTRAN for the CYBER 175/CDC 6600 system are provided to implement the two algorithms

  1. Pronóstico de la diarrea por rotavirus

    Directory of Open Access Journals (Sweden)

    Mota-Hernández Felipe

    2001-01-01

    Full Text Available Objetivo. Comparar la gravedad de la diarrea por rotavirus (RV y por no rotavirus. Material y métodos. Estudio transversal en 520 lactantes con diarrea aguda, efectuado entre octubre de 1994 y marzo de 1995 en siete centros del primer nivel de atención en cinco estados de México. El diagnóstico de RV se realizó con ensayo inmunoenzimático o por electroforesis. El análisis se hizo a través de medidas de tendencia central. Los resultados se presentan como promedio y desviación estándar o mediana o variación. Resultados. Se aisló RV en 264 lactantes (50.7% con predominio en varones de 6 meses a un año. Las manifestaciones clínicas fueron significativamente diferentes entre el grupo rotavirus positivo y el grupo rotavirus negativo en mediana de evacuaciones por 24 horas, frecuencia de vómitos, temperatura > 38° C, deshidratación y calificación de gravedad, respectivamente. Conclusiones. Estos resultados mostraron peor pronóstico por mayor gravedad de la diarrea por RV en lactantes, con relación a otra etiología. El texto completo en inglés de este artículo está disponible en: http://www.insp.mx/salud/index.html

  2. The PorX response regulator of the Porphyromonas gingivalis PorXY two-component system does not directly regulate the Type IX secretion genes but binds the PorL subunit.

    Directory of Open Access Journals (Sweden)

    Maxence S Vincent

    2016-08-01

    Full Text Available The Type IX secretion system (T9SS is a versatile multi-protein complex restricted to bacteria of the Bacteriodetes phylum and responsible for the secretion of surface attachment of diverse proteins that participate to S-layer formation, gliding motility or pathogenesis. The T9SS is poorly characterized but a number of proteins involved in the assembly of the secretion apparatus in the oral pathogen Porphyromonas gingivalis have been identified based on genome substractive analyses. Among these proteins, PorY and PorX encode typical two-component system (TCS sensor and CheY-like response regulator respectively. Although the porX and porY genes do not localize at the same genetic locus, it has been proposed that PorXY form a bona fide TCS. Deletion of the porX in P. gingivalis causes a slight decrease of the expression of a number of other T9SS genes, including sov, porT, porP, porK, porL, porM, porN and porY. Here, we show that PorX and the soluble cytoplasmic domain of PorY interact. Using electrophoretic mobility shift, DNA-protein co-purification and heterologous host expression assays, we showed that PorX does not bind and does not directly regulate expression of the T9SS genes. Finally, we show that PorX interacts with the cytoplasmic domain of PorL, a component of the T9SS membrane core complex and propose that the CheY-like PorX protein might be involved in the dynamics of the T9SS.

  3. The PorX Response Regulator of the Porphyromonas gingivalis PorXY Two-Component System Does Not Directly Regulate the Type IX Secretion Genes but Binds the PorL Subunit

    Science.gov (United States)

    Vincent, Maxence S.; Durand, Eric; Cascales, Eric

    2016-01-01

    The Type IX secretion system (T9SS) is a versatile multi-protein complex restricted to bacteria of the Bacteriodetes phylum and responsible for the secretion or cell surface exposition of diverse proteins that participate to S-layer formation, gliding motility or pathogenesis. The T9SS is poorly characterized but a number of proteins involved in the assembly of the secretion apparatus in the oral pathogen Porphyromonas gingivalis have been identified based on genome substractive analyses. Among these proteins, PorY, and PorX encode typical two-component system (TCS) sensor and CheY-like response regulator respectively. Although the porX and porY genes do not localize at the same genetic locus, it has been proposed that PorXY form a bona fide TCS. Deletion of porX in P. gingivalis causes a slight decrease of the expression of a number of other T9SS genes, including sov, porT, porP, porK, porL, porM, porN, and porY. Here, we show that PorX and the soluble cytoplasmic domain of PorY interact. Using electrophoretic mobility shift, DNA-protein co-purification and heterologous host expression assays, we demonstrate that PorX does not bind T9SS gene promoters and does not directly regulate expression of the T9SS genes. Finally, we show that PorX interacts with the cytoplasmic domain of PorL, a component of the T9SS membrane core complex and propose that the CheY-like PorX protein might be involved in the dynamics of the T9SS. PMID:27630829

  4. Cortical Thinning in Network-Associated Regions in Cognitively Normal and Below-Normal Range Schizophrenia

    Directory of Open Access Journals (Sweden)

    R. Walter Heinrichs

    2017-01-01

    Full Text Available This study assessed whether cortical thickness across the brain and regionally in terms of the default mode, salience, and central executive networks differentiates schizophrenia patients and healthy controls with normal range or below-normal range cognitive performance. Cognitive normality was defined using the MATRICS Consensus Cognitive Battery (MCCB composite score (T=50 ± 10 and structural magnetic resonance imaging was used to generate cortical thickness data. Whole brain analysis revealed that cognitively normal range controls (n=39 had greater cortical thickness than both cognitively normal (n=17 and below-normal range (n=49 patients. Cognitively normal controls also demonstrated greater thickness than patients in regions associated with the default mode and salience, but not central executive networks. No differences on any thickness measure were found between cognitively normal range and below-normal range controls (n=24 or between cognitively normal and below-normal range patients. In addition, structural covariance between network regions was high and similar across subgroups. Positive and negative symptom severity did not correlate with thickness values. Cortical thinning across the brain and regionally in relation to the default and salience networks may index shared aspects of the psychotic psychopathology that defines schizophrenia with no relation to cognitive impairment.

  5. Desenvolvimento de um kit de irrigação por microtubos com moto-bomba propulsionada por energia solar

    OpenAIRE

    Luiz Ricardo Sobenko

    2016-01-01

    O bombeamento de água por meio da energia solar vem se mostrando uma alternativa para localidades onde outras fontes de energia não estão disponíveis ou são limitadas. Torna-se interessante aliar essa alternativa a um sistema de irrigação que opera com vazão e pressão relativamente baixas, como a irrigação localizada por microtubos, possibilitando assim a obtenção de alta eficiência. No presente trabalho teve-se por objetivo dimensionar e avaliar um kit de irrigação por microtubos, alimentado...

  6. Neuropatia experimental por DDT: análise de nervo por microdissecção de fibras

    Directory of Open Access Journals (Sweden)

    Edison Matos Nóvak

    1984-09-01

    Full Text Available Estudou-se o nervo gênito-femural do rato albino submetido a intoxicação crônica por DDT, administrado por 180 dias na dose de 5 mg/kg de peso via oral. Os resultados mostraram proporção anormal de fibras tipo C, sendo sugerido ocorrer degeneração tipo axonal determinada pelo DDT.

  7. Parser Adaptation for Social Media by Integrating Normalization

    NARCIS (Netherlands)

    van der Goot, Rob; van Noord, Gerardus

    This work explores normalization for parser adaptation. Traditionally, normalization is used as separate pre-processing step. We show that integrating the normalization model into the parsing algorithm is beneficial. This way, multiple normalization candidates can be leveraged, which improves

  8. Fibroelastoma papilar de la válvula mitral

    Directory of Open Access Journals (Sweden)

    Fernando Reguillo

    2006-01-01

    Full Text Available Mujer de 59 años, que presentaba accidentes cerebrovasculares de repetición, de posible origen cardioembólico. Al realizar el estudio cardiológico, en el ecocardiograma transesofágico se detectó una masa de 7–8 mm dependiente de la valva anterior mitral, que ocasionaba una insuficiencia mitral leve (Fig. 1. Fue intervenida bajo circulación extracorpórea, por vía transeptal anterior auricular, extirpándose dicha masa y la base de implantación, cerrando el defecto de la valva mitral con puntos sueltos (Fig. 2. El postoperatorio fue normal, siendo dada de alta a los 7 días. La anatomía patológica demostró que se trataba de un fibroelastoma papilar.

  9. Por y para en los manuales de ELE

    Directory of Open Access Journals (Sweden)

    Sidoti, Rossana

    2008-12-01

    Full Text Available La oposición por / para es una de las cuestiones gramaticales que comportan mayor dificultad a la hora de acercarse al estudio del español como L2 sobre todo cuando remiten a conceptos lingüísticos difíciles de entender por no tener ésta referente alguno en el mundo extralingüístico. Si, por un lado, nos resulta fácil entender lo que tiene un referente en el mundo concreto; por otro, no podemos advertir el referente extralingüístico de preposiciones como por / para, si este no existe. Si las preposiciones son elementos abstractos, difíciles de aferrar de por sí, podemos sólo examinar los elementos que éstas ponen en relación y en qué contextos esta relación se determina. Para poder utilizar con precisión las dos preposiciones, es importante no reducirlas a una sola preposición como ocurre en otros idiomas, y sobre todo no relacionarlas sólo a los conceptos de causa y finalidad. Este trabajo se propone individualizar los manuales de español como lengua extranjera más utilizados en las universidades italianas para luego comparar las distintas fuentes de información sobre por / para y exponer comentarios, reflexiones y sugerencias sobre el tema con el fin de precisar en qué medida se puede mejorar lo que los manuales reducen o generalizan, puesto que para los estudiantes de ELE estos representan una herramienta valiosa a la que acudir.

  10. Linear regression and the normality assumption.

    Science.gov (United States)

    Schmidt, Amand F; Finan, Chris

    2017-12-16

    Researchers often perform arbitrary outcome transformations to fulfill the normality assumption of a linear regression model. This commentary explains and illustrates that in large data settings, such transformations are often unnecessary, and worse may bias model estimates. Linear regression assumptions are illustrated using simulated data and an empirical example on the relation between time since type 2 diabetes diagnosis and glycated hemoglobin levels. Simulation results were evaluated on coverage; i.e., the number of times the 95% confidence interval included the true slope coefficient. Although outcome transformations bias point estimates, violations of the normality assumption in linear regression analyses do not. The normality assumption is necessary to unbiasedly estimate standard errors, and hence confidence intervals and P-values. However, in large sample sizes (e.g., where the number of observations per variable is >10) violations of this normality assumption often do not noticeably impact results. Contrary to this, assumptions on, the parametric model, absence of extreme observations, homoscedasticity, and independency of the errors, remain influential even in large sample size settings. Given that modern healthcare research typically includes thousands of subjects focusing on the normality assumption is often unnecessary, does not guarantee valid results, and worse may bias estimates due to the practice of outcome transformations. Copyright © 2017 Elsevier Inc. All rights reserved.

  11. Quantitative thallium-201 myocardial exercise scintigraphy in normal subjects and patients with normal coronary arteries

    International Nuclear Information System (INIS)

    Niemeyer, M.G.; St. Antonius Hospital Nieuwegein; Laarman, G.J.; Lelbach, S.; Cramer, M.J.; Ascoop, C.A.P.L.; Verzijlbergen, J.F.; Wall, E.E. van der; Zwinderman, A.H.; Pauwels, E.K.J.

    1990-01-01

    Quantitative thallium-201 myocardial exercise scintigraphy was tested in two patient populations representing alternative standards for cardiac normality: group I comprised 18 male uncatherized patients with a low likelihood of coronary artery disease (CAD); group II contained 41 patients with normal coronary arteriograms. Group I patients were younger, they achieved a higher rate-pressure product than group II patients; all had normal findings by phisical examination and electrocardiography at rest and exercise. Group II patients comprised 21 females, 11 patients showed abnormal electrocardiography at rest, and five patients showed ischemic ST depression during exercise. Twelve patients had sign of minimal CAD. Twelve patients revealed abnormal visual and quantitative thallium findings, three of these patients had minimal CAD. Profiles of uptake and washout of thallium-201 were derived from both patient groups, and compared with normal limits developed by Maddahi et al. Furthermore, low likelihood and angiographically normal patients may differ substantially, and both sets of normal patients should be considered when establishing criteria of abnormality in exercise thallium imaging. When commercial software containing normal limits for quantitative analysis of exercise thallium-201 imaging is used in clinical practice, it is mandatory to compare these with normal limits of uptake and washout of thallium-201, derived from the less heterogeneous group of low-likelihood subjects, which should be used in selecting a normal population to define normality. (author). 37 refs.; 3 figs; 1 tab

  12. Normal people working in normal organizations with normal equipment: system safety and cognition in a mid-air collision.

    Science.gov (United States)

    de Carvalho, Paulo Victor Rodrigues; Gomes, José Orlando; Huber, Gilbert Jacob; Vidal, Mario Cesar

    2009-05-01

    A fundamental challenge in improving the safety of complex systems is to understand how accidents emerge in normal working situations, with equipment functioning normally in normally structured organizations. We present a field study of the en route mid-air collision between a commercial carrier and an executive jet, in the clear afternoon Amazon sky in which 154 people lost their lives, that illustrates one response to this challenge. Our focus was on how and why the several safety barriers of a well structured air traffic system melted down enabling the occurrence of this tragedy, without any catastrophic component failure, and in a situation where everything was functioning normally. We identify strong consistencies and feedbacks regarding factors of system day-to-day functioning that made monitoring and awareness difficult, and the cognitive strategies that operators have developed to deal with overall system behavior. These findings emphasize the active problem-solving behavior needed in air traffic control work, and highlight how the day-to-day functioning of the system can jeopardize such behavior. An immediate consequence is that safety managers and engineers should review their traditional safety approach and accident models based on equipment failure probability, linear combinations of failures, rules and procedures, and human errors, to deal with complex patterns of coincidence possibilities, unexpected links, resonance among system functions and activities, and system cognition.

  13. Computed tomography of the normal sternum

    International Nuclear Information System (INIS)

    Goodman, L.R.; Teplick, S.K.; Kay, H.

    1983-01-01

    The normal CT anatomy of the sternum was studied in 35 patients. In addition to the normal appearance of the sternum, normal variants that may mimic desease were often noted. In the manubrium, part of the posterior cortical margin was unsharp and irregular in 34 of 35 patients. Part of the anterior cortical margin was indistinct in 20 of the 35 patients. Angulation of the CT gantry to a position more nearly perpendicular to the manubrium improved the definition of the cortical margins. The body of the sternum was ovoid to rectangular and usually had sharp cortical margins. Sections through the manubriosternal joint and xyphoid often demonstrated irregular mottled calcifications and indistinct margins again simulating bony lesions. The rib insertions, sternal clavicular joints, and adjacent soft-tissue appearance also were evaluated

  14. Masturbation, sexuality, and adaptation: normalization in adolescence.

    Science.gov (United States)

    Shapiro, Theodore

    2008-03-01

    During adolescence the central masturbation fantasy that is formulated during childhood takes its final form and paradoxically must now be directed outward for appropriate object finding and pair matching in the service of procreative aims. This is a step in adaptation that requires a further developmental landmark that I have called normalization. The path toward airing these private fantasies is facilitated by chumship relationships as a step toward further exposure to the social surround. Hartmann's structuring application of adaptation within psychoanalysis is used as a framework for understanding the process that simultaneously serves intrapsychic and social demands and permits goals that follow evolutionary principles. Variations in the normalization process from masturbatory isolation to a variety of forms of sexual socialization are examined in sociological data concerning current adolescent sexual behavior and in case examples that indicate some routes to normalized experience and practice.

  15. Asymptotic normalization coefficients and astrophysical factors

    International Nuclear Information System (INIS)

    Mukhamedzhanov, A.M.; Azhari, A.; Clark, H.L.; Gagliardi, C.A.; Lui, Y.-W.; Sattarov, A.; Trache, L.; Tribble, R.E.; Burjan, V.; Kroha, V.; Carstoiu, F.

    2000-01-01

    The S factor for the direct capture reaction 7 Be(p,γ) 8 B can be found at astrophysical energies from the asymptotic normalization coefficients (ANC's) which provide the normalization of the tails of the overlap functions for 8 B → 7 Be + p. Peripheral transfer reactions offer a technique to determine these ANC's. Using this technique, the 10 B( 7 Be, 8 B) 9 Be and 14 N( 7 Be, 8 B) 13 C reactions have been used to measure the asymptotic normalization coefficient for 7 Be(p, γ) 8 B. These results provide an indirect determination of S 17 (0). Analysis of the existing 9 Be(p, γ) 10 B experimental data within the framework of the R-matrix method demonstrates that experimentally measured ANC's can provide a reasonable determination of direct radiative capture rates. (author)

  16. Congenital anomalies and normal skeletal variants

    International Nuclear Information System (INIS)

    Guebert, G.M.; Yochum, T.R.; Rowe, L.J.

    1987-01-01

    Congenital anomalies and normal skeletal variants are a common occurrence in clinical practice. In this chapter a large number of skeletal anomalies of the spine and pelvis are reviewed. Some of the more common skeletal anomalies of the extremities are also presented. The second section of this chapter deals with normal skeletal variants. Some of these variants may simulate certain disease processes. In some instances there are no clear-cut distinctions between skeletal variants and anomalies; therefore, there may be some overlap of material. The congenital anomalies are presented initially with accompanying text, photos, and references, beginning with the skull and proceeding caudally through the spine to then include the pelvis and extremities. The normal skeletal variants section is presented in an anatomical atlas format without text or references

  17. X-ray emssion from normal galaxies

    International Nuclear Information System (INIS)

    Speybroeck, L. van; Bechtold, J.

    1981-01-01

    A summary of results obtained with the Einstein Observatory is presented. There are two general categories of normal galaxy investigation being pursued - detailed studies of nearby galaxies where individual sources can be detected and possibly correlated with galactic morphology, and shorter observations of many more distant objects to determine the total luminosity distribution of normal galaxies. The principal examples of the first type are the CFA study of M31 and the Columbia study of the Large Magellanic Cloud. The Columbia normal galaxy survey is the principal example of the second type, although there also are smaller CFA programs concentrating on early galaxies and peculiar galaxies, and MIT has observed some members of the local group. (Auth.)

  18. Quantum arrival times and operator normalization

    International Nuclear Information System (INIS)

    Hegerfeldt, Gerhard C.; Seidel, Dirk; Gonzalo Muga, J.

    2003-01-01

    A recent approach to arrival times used the fluorescence of an atom entering a laser illuminated region, and the resulting arrival-time distribution was close to the axiomatic distribution of Kijowski, but not exactly equal, neither in limiting cases nor after compensation of reflection losses by normalization on the level of expectation values. In this paper we employ a normalization on the level of operators, recently proposed in a slightly different context. We show that in this case the axiomatic arrival-time distribution of Kijowski is recovered as a limiting case. In addition, it is shown that Allcock's complex potential model is also a limit of the physically motivated fluorescence approach and connected to Kijowski's distribution through operator normalization

  19. Helicon normal modes in Proto-MPEX

    Science.gov (United States)

    Piotrowicz, P. A.; Caneses, J. F.; Green, D. L.; Goulding, R. H.; Lau, C.; Caughman, J. B. O.; Rapp, J.; Ruzic, D. N.

    2018-05-01

    The Proto-MPEX helicon source has been operating in a high electron density ‘helicon-mode’. Establishing plasma densities and magnetic field strengths under the antenna that allow for the formation of normal modes of the fast-wave are believed to be responsible for the ‘helicon-mode’. A 2D finite-element full-wave model of the helicon antenna on Proto-MPEX is used to identify the fast-wave normal modes responsible for the steady-state electron density profile produced by the source. We also show through the simulation that in the regions of operation in which core power deposition is maximum the slow-wave does not deposit significant power besides directly under the antenna. In the case of a simulation where a normal mode is not excited significant edge power is deposited in the mirror region. ).

  20. Normalization as a canonical neural computation

    Science.gov (United States)

    Carandini, Matteo; Heeger, David J.

    2012-01-01

    There is increasing evidence that the brain relies on a set of canonical neural computations, repeating them across brain regions and modalities to apply similar operations to different problems. A promising candidate for such a computation is normalization, in which the responses of neurons are divided by a common factor that typically includes the summed activity of a pool of neurons. Normalization was developed to explain responses in the primary visual cortex and is now thought to operate throughout the visual system, and in many other sensory modalities and brain regions. Normalization may underlie operations such as the representation of odours, the modulatory effects of visual attention, the encoding of value and the integration of multisensory information. Its presence in such a diversity of neural systems in multiple species, from invertebrates to mammals, suggests that it serves as a canonical neural computation. PMID:22108672

  1. Queratinocitos derivados de piel humana modificados por el vector retroviral FOCH 29-NeoR

    Directory of Open Access Journals (Sweden)

    Luz Marina Restrepo

    2000-02-01

    Full Text Available

    Normal">En este protocolo se evaluará la eficiencia de la transducción mediada por el vector retroviral FOCH 29-NeoR derivado del virus de Friend; éste ha mostrado una alta eficiencia en la transducción, tanto de células madres hematopoyéticas como de otras líneas celulares. Se medirá su eficiencia de transducción en cultivos primarios de queratinocitos, derivados de biopsias de piel humana o de sobrantes de procedimientos quirúrgicos como circuncisiones, mastectomías y cirugía cosmética de pacientes que consultan el Hospital Universitario San Vicente de Paul, Hospital la María, la Clínica del Rosario y la Clínica León XIII.

    Normal">Las muestras de piel se procesarán en un lapso no superior a 12 horas, se eliminará el exceso de dermis y tejido conectivo por digestión con dispasa (0.6-2.4 U/ml a 37°C durante 1 hora. Las muestras serán lavadas con PBS, antibiótico (penicilina + estreptomicina y se cortarán en fragmentos de 1-2 mm; después de 2-3 horas de digestión con tripsina-EDTA (0.25% las células serán resuspendidas en KGM (Medio de crecimiento para queratinocitos y se sembrarán a una concentración de 105 - 3x105 células por plato de 100 mm; se incubarán a 37°C, 5% CO2 con cambios de medio 2-3 veces por semana. Se harán subcultivos con el fin de expandirlos y congelar una parte de las

  2. Normal stress Sestamibi study: why re inject?

    International Nuclear Information System (INIS)

    Unger, S.A.; Hughes, T.

    2000-01-01

    Full text: Myocardial perfusion imaging (MPI) is widely used for risk stratification of patients with known or suspected coronary artery disease. A normal MPI study predicts an annual cardiac event rate of 99 Tc m -Sestamibi (MIBI), omitting the rest study when the post-stress study is interpreted as normal. The safety of this approach has not been validated, all published reports utilising both rest and stress images to interpret a study as 'normal'. Between 1/1/98 and 30/8/98, 489 patients (patients) were referred to our department for stress MPI. Of these, 237 were interpreted as normal on the basis of their post-stress study, and did not undergo a rest study. 12 month clinical follow-up was available in 184 (78%) of these patients, representing the study group (82 males, 102 females; mean age 61±12 years). 156 of these patients were referred for assessment of chest pain, three for dyspnoea, six for abnormal ECGs, and 19 for pre-operative evaluation. At one year of follow-up, there were no myocardial infarcts or admissions for unstable angina, and no cardiac deaths. Three patients died of non-cardiac causes. Seven patients underwent coronary angiography: five were normal, one had a single 50% stenosis, and one had an 80% vein graft stenosis which was subsequently angioplastied. In conclusion, a normal stress MIBI image predicts an excellent prognosis and negates the need for a rest reinjection study, thus reducing patient camera time and radiation exposure, improving departmental throughput, and minimising public health expenditure. Copyright (2000) The Australian and New Zealand Society of Nuclear Medicine Inc

  3. Normal modes of weak colloidal gels

    Science.gov (United States)

    Varga, Zsigmond; Swan, James W.

    2018-01-01

    The normal modes and relaxation rates of weak colloidal gels are investigated in calculations using different models of the hydrodynamic interactions between suspended particles. The relaxation spectrum is computed for freely draining, Rotne-Prager-Yamakawa, and accelerated Stokesian dynamics approximations of the hydrodynamic mobility in a normal mode analysis of a harmonic network representing several colloidal gels. We find that the density of states and spatial structure of the normal modes are fundamentally altered by long-ranged hydrodynamic coupling among the particles. Short-ranged coupling due to hydrodynamic lubrication affects only the relaxation rates of short-wavelength modes. Hydrodynamic models accounting for long-ranged coupling exhibit a microscopic relaxation rate for each normal mode, λ that scales as l-2, where l is the spatial correlation length of the normal mode. For the freely draining approximation, which neglects long-ranged coupling, the microscopic relaxation rate scales as l-γ, where γ varies between three and two with increasing particle volume fraction. A simple phenomenological model of the internal elastic response to normal mode fluctuations is developed, which shows that long-ranged hydrodynamic interactions play a central role in the viscoelasticity of the gel network. Dynamic simulations of hard spheres that gel in response to short-ranged depletion attractions are used to test the applicability of the density of states predictions. For particle concentrations up to 30% by volume, the power law decay of the relaxation modulus in simulations accounting for long-ranged hydrodynamic interactions agrees with predictions generated by the density of states of the corresponding harmonic networks as well as experimental measurements. For higher volume fractions, excluded volume interactions dominate the stress response, and the prediction from the harmonic network density of states fails. Analogous to the Zimm model in polymer

  4. Metabolomics data normalization with EigenMS.

    Directory of Open Access Journals (Sweden)

    Yuliya V Karpievitch

    Full Text Available Liquid chromatography mass spectrometry has become one of the analytical platforms of choice for metabolomics studies. However, LC-MS metabolomics data can suffer from the effects of various systematic biases. These include batch effects, day-to-day variations in instrument performance, signal intensity loss due to time-dependent effects of the LC column performance, accumulation of contaminants in the MS ion source and MS sensitivity among others. In this study we aimed to test a singular value decomposition-based method, called EigenMS, for normalization of metabolomics data. We analyzed a clinical human dataset where LC-MS serum metabolomics data and physiological measurements were collected from thirty nine healthy subjects and forty with type 2 diabetes and applied EigenMS to detect and correct for any systematic bias. EigenMS works in several stages. First, EigenMS preserves the treatment group differences in the metabolomics data by estimating treatment effects with an ANOVA model (multiple fixed effects can be estimated. Singular value decomposition of the residuals matrix is then used to determine bias trends in the data. The number of bias trends is then estimated via a permutation test and the effects of the bias trends are eliminated. EigenMS removed bias of unknown complexity from the LC-MS metabolomics data, allowing for increased sensitivity in differential analysis. Moreover, normalized samples better correlated with both other normalized samples and corresponding physiological data, such as blood glucose level, glycated haemoglobin, exercise central augmentation pressure normalized to heart rate of 75, and total cholesterol. We were able to report 2578 discriminatory metabolite peaks in the normalized data (p<0.05 as compared to only 1840 metabolite signals in the raw data. Our results support the use of singular value decomposition-based normalization for metabolomics data.

  5. Riesgos antrópicos generados por la actividad minera

    Directory of Open Access Journals (Sweden)

    Ana Violeta Argüello Mejía

    2013-10-01

    Full Text Available Las actividades productivas generan riesgos antrópicos [1] a mediano y largo plazo. La zona de estudio se ubica en las Parroquias de Pomasqui, San Antonio y Calacalí, donde se han producido riesgos debido a las actividades humanas, en este caso, por la explotación de las canteras para abastecer el mercado de la construcción del Distrito Metropolitano de Quito. La investigación propone determinar los riesgos antrópicos generados por la actividad minera. Los pobladores de la zona identifican que la minería artesanal en sus inicios constituyó una fuente de trabajo, donde sus familias también se involucraban. Actualmente, se observa que en la mayoría de las canteras se utiliza maquinaria especializada y no participan los trabajadores de la zona. Los taludes de las canteras son de 80o y 90o grados, generando amenazas para los trabajadores y moradores de las viviendas aledañas. Uno de los mayores impactos es la contaminación del aire, sin embargo, el suelo y los cursos de agua están siendo afectados por los desperdicios que produce la actividad minera. La población, que está expuesta permanentemente al polvo ocasionado por las canteras y al transporte de material, acusa enfermedades de tipo respiratorio. Así mismo, el ruido ocasionado por el transporte constituye una molestia constante para los pobladores.

  6. Computing Instantaneous Frequency by normalizing Hilbert Transform

    Science.gov (United States)

    Huang, Norden E.

    2005-05-31

    This invention presents Normalized Amplitude Hilbert Transform (NAHT) and Normalized Hilbert Transform(NHT), both of which are new methods for computing Instantaneous Frequency. This method is designed specifically to circumvent the limitation set by the Bedorsian and Nuttal Theorems, and to provide a sharp local measure of error when the quadrature and the Hilbert Transform do not agree. Motivation for this method is that straightforward application of the Hilbert Transform followed by taking the derivative of the phase-angle as the Instantaneous Frequency (IF) leads to a common mistake made up to this date. In order to make the Hilbert Transform method work, the data has to obey certain restrictions.

  7. Normal anatomy of lung perfusion SPECT scintigraphy

    International Nuclear Information System (INIS)

    Moskowitz, G.W.; Levy, L.M.

    1987-01-01

    Ten patients studies for possible pulmonary embolic disease had normal lung perfusion planar and SPECT scintigraphy. A computer program was developed to superimpose the CT scans on corresponding SPECT images. Superimposition of CT scans on corresponding SPECT transaxial cross-sectional images, when available, provides the needed definition and relationships of adjacent organs. SPECT transaxial sections provide clear anatomic definition of perfusion defects without foreground and background lung tissue superimposed. The location, shape, and size of the perfusion defects can be readily assessed by SPECT. An algorithm was developed for the differentiation of abnormal pulmonary perfusion patterns from normal structures on variation

  8. Anatomy, normal variants, and basic biomechanics

    International Nuclear Information System (INIS)

    Berquist, T.H.; Johnson, K.A.

    1989-01-01

    This paper reports on the anatomy and basic functions of the foot and ankle important to physicians involved in imaging procedures, clinical medicine, and surgery. New radiographic techniques especially magnetic resonance imaging, provide more diagnostic information owing to improved tissue contrast and the ability to obtain multiple image planes (axial, sagittal, coronal, oblique). Therefore, a thorough knowledge of skeletal and soft tissue anatomy is even more essential. Normal variants must also be understood in order to distinguish normal from pathologic changes in the foot and ankle. A basic understanding of biomechanics is also essential for selecting the proper diagnostic techniques

  9. Dlk1 in normal and abnormal hematopoiesis

    DEFF Research Database (Denmark)

    Sakajiri, S; O'kelly, J; Yin, D

    2005-01-01

    normals. Also, Dlk1 mRNA was elevated in mononuclear, low density bone marrow cells from 11/38 MDS patients, 5/11 AML M6 and 2/4 AML M7 samples. Furthermore, 5/6 erythroleukemia and 2/2 megakaryocytic leukemia cell lines highly expressed Dlk1 mRNA. Levels of Dlk1 mRNA markedly increased during...... (particularly M6, M7), and it appears to be associated with normal development of megakaryocytes and B cells....

  10. Statistical Theory of Normal Grain Growth Revisited

    International Nuclear Information System (INIS)

    Gadomski, A.; Luczka, J.

    2002-01-01

    In this paper, we discuss three physically relevant problems concerning the normal grain growth process. These are: Infinite vs finite size of the system under study (a step towards more realistic modeling); conditions of fine-grained structure formation, with possible applications to thin films and biomembranes, and interesting relations to superplasticity of materials; approach to log-normality, an ubiquitous natural phenomenon, frequently reported in literature. It turns out that all three important points mentioned are possible to be included in a Mulheran-Harding type behavior of evolving grains-containing systems that we have studied previously. (author)

  11. Radiogenomics: predicting clinical normal tissue radiosensitivity

    DEFF Research Database (Denmark)

    Alsner, Jan

    2006-01-01

    Studies on the genetic basis of normal tissue radiosensitivity, or  'radiogenomics', aims at predicting clinical radiosensitivity and optimize treatment from individual genetic profiles. Several studies have now reported links between variations in certain genes related to the biological response...... to radiation injury and risk of normal tissue morbidity in cancer patients treated with radiotherapy. However, after these initial association studies including few genes, we are still far from being able to predict clinical radiosensitivity on an individual level. Recent data from our own studies on risk...

  12. Detección de Automóviles en Escenarios Urbanos Escaneados por un Lidar

    Directory of Open Access Journals (Sweden)

    Alfonso Ramírez-Pedraza

    2015-04-01

    Full Text Available Resumen: En este trabajo se desarrollaron algoritmos computacionales los cuales permiten segmentar y detectar los automóviles que se encuentran dentro de una nube de puntos 3D pertenecientes a un entorno urbano. Las nubes son adquiridas con el sistema LIDAR velodyne HDL-64E, el cual es capaz de reconstruir objetos que se encuentran a una distancia de 3 a 120 metros. El desarrollo del trabajo está dividido en dos etapas: la segmentación de objetos 3D y la indexación. Se considera que el ambiente es semi estructurado debido a que objetos como las fachadas de los edificios y el suelo pueden ser modelados por planos. La segmentación está compuesta por tres módulos: el primero consiste en la extracción del plano principal o suelo; en el segundo módulo se extraen los planos perpendiculares al suelo, los cuales son segmentados por una adaptación al método de Hough; y en el último módulo se aplica una segmentación a los objetos restantes usando el método MeanShift. La indexación está dividida en dos módulos: en el primero, los objetos segmentados son modelados por histogramas usando las direcciones de las normales de los puntos 3D de los objetos; en el segundo módulo, los histogramas son usados para comparar con una biblioteca de datos previamente construida. En este trabajo hemos usado el análisis ROC para optimizar los umbrales empleados. Se utilizan dos bases de datos: la primera es de entrenamiento y está compuesta por 4500 objetos; mientras que la segunda corresponde a la de prueba, la cual está compuesta por 3000 objetos y fue usada para verificar los resultados de entrenamiento. La aportación de este trabajo es presentar un nuevo sistema para detectar automóviles utilizando puntos 3D. Abstract: Detection of vehicles on 3D point clouds is performed by using the algorithm presented in this work. Point clouds correspond to urban environments and were acquired with the LIDAR Velodyne HDL-64E. The environment is considered semi

  13. Dos casos de cirugía del recto por prolapso (Curación del prolapso del recto con la operación de Lockhart-Mummery

    Directory of Open Access Journals (Sweden)

    Manuel José Luque

    1944-07-01

    III Finaliza su trabajo con unas "Breves consideraciones" haciendo hincapié en las conductas a seguir según se trate de prolapso uterino o rectal a la vez que define las ventajas de la operación de Lockhart Mummery por cuanto "coloca al recto en su sitio natural dándole solidez, creando adherencias que lo mantienen en su lugar normal; y, por otra parte formando un suelo de resistencia suficiente que impide su descenso."

  14. Itinerario de la Patria: por tierras del golfo lejano

    Directory of Open Access Journals (Sweden)

    Adel López Gómez

    1965-06-01

    Full Text Available Veinticinco años atrás solo primaba en estas infinitudes el imperio de la selva. Desde Dabeiba tórrido hasta Turbo sudoroso y lacustre se empleaba casi una semana a lomo de mula o a quimba de peatón, por una sombría trocha de miasmas y de lodo, abierta a machete por entre la áspera e interminable manigua. Por allí pasaron una y otra vez los pálidos hombres de nuestros enganches, cuando en 1939 iniciamos, a la orilla del Golfo de Urabá, la ingente tarea de construír una carretera hacia el interior para poner al alcance de las llantas antioqueñas la orilla salvaje del Atlántico maicero.

  15. Micetoma pulmonar por Scedosporium sp, reporte de dos casos

    Directory of Open Access Journals (Sweden)

    José G. Somocurcio

    2009-07-01

    Full Text Available Se reporta los dos primeros casos de micetoma pulmonar por Scedosporium sp, en el Perú, tratados quirúrgicamente en el Hospital Nacional Hipólito Unanue. Se practicó resección pulmonar debido a micetoma pulmonar de donde se tomó muestras que fueron enviadas a microbiología y anatomía patológica para cultivo y estudio histopatológico. Se identificó el moho Scedosporium sp en dos pacientes con secuelas cavitarias por tuberculosis, quienes presentaron tos y hemoptisis de dos meses y tres años de evolución, respectivamente. Radiológicamente las cavidades estaban ocupadas por una "bola fúngica". La histopatología indicó presencia de abundantes hifas, indistinguibles de las de Aspergillus sp, mientras que la inmunodifusión para Aspergillus fue negativa.

  16. Mortalidad por neumonía en menores de 5 años

    Directory of Open Access Journals (Sweden)

    Caridad María Tamayo Reus

    2014-03-01

    Full Text Available Se llevó a cabo un estudio observacional, descriptivo y transversal de 18 niños menores de 5 años de edad, fallecidos por neumonía adquirida en la comunidad (como causa básica de muerte en el Hospital Docente Pediátrico Sur durante el período de enero de 1997 a diciembre de 2011, con vistas a caracterizarles y determinar las tasas de mortalidad por dicha causa. Las variables clínicas, epidemiológicas y paraclínicas se obtuvieron de los registros de defunciones y morbilidad del Departamento de Estadística de la institución, así como de las historias clínicas de los pacientes. En la investigación se observó que el mayor número de fallecidos correspondiera al sexo masculino (67,7 % y al grupo etario de 1-4 años (58,8 %; además primaron el cuadro clínico muy grave al momento del ingreso (44,4 %, la anemia (82,3 %, los ingresos previos (100,0 %, el hacinamiento (77,7 %, el asma bronquial como enfermedad crónica (61,1%, la linfocitosis (61,1 %, el recuento de leucocitos normal (50,0 % y las imágenes de condensación inflamatoria bilateral en las radiografías (61,1 %. Las tasas de mortalidad específica y mortalidad proporcional por neumonía mostraron tendencias evolutivas descendentes, en tanto la de mortalidad bruta reveló menor cuantía

  17. El control de la limpieza de las arenas por medio del ensayo del azul de metileno

    Directory of Open Access Journals (Sweden)

    Ramírez Ortiz, J. L.

    1986-07-01

    Full Text Available In the first part of this work, the main lines of the investigation work developed at LABEIN on the «Influence of the limy and clayey slimes from calcareous crushed sands on concrete properties» are presented. As a consequence of it, new limits are proposed to consideration regarding the admissible content of slime in crushed sands, reaching a limit higher than 15%, controling the slime nature by means of an equivalent of normal sand and specially by Methylene Blue. The second part of the work is devoted to the development of the methodology for the obtention of Methylene Blue, in sands used in the elaboration of concrete which have a little amount of clay, taking as a base the method applied by French normative, duly adapted and with different expression of the results.Se muestran, en la primera parte del artículo, las líneas fundamentales del trabajo de investigación desarrollado en LABEIN, sobre la «Influencia de los finos calizos y arcillosos de arenas calizas de machaqueo, en las propiedades del hormigón». Como consecuencia del mismo, se proponen nuevos límites a considerar respecto al contenido admisible de finos en las arenas calizas de machaqueo, llegando a un límite superior del 15%, controlando la naturaleza de los finos por medio del equivalente de arena a vista, y, sobre todo, por el Azul de Metileno. En la segunda parte del artículo, se desarrolla la metodología utilizada para obtener el Azul de Metileno, en arenas utilizadas en la confección de hormigón, que poseen poca arcilla, basándose en el método aplicado por la normativa francesa, adaptado convenientemente y con diferente expresión de resultados.

  18. Papel del endotelio en hipertensión inducida por el embarazo: ¿alteraciones comunes a las de la aterosclerosis?

    OpenAIRE

    López-Jaramillo, Patricio; Sotomayor-Rubio, Katherine; Sotomayor-Rubio, Arístides; López-López, Cristina

    2014-01-01

    La hipertensión inducida por el embarazo, cuya forma proteinúrica es denominada preeclampsia (PE), es una alteración que ocurre en el segundo trimestre del embarazo, y se caracteriza por la presencia de hipertensión y proteinuria. Durante el embarazo normal ocurren cambios fisiológicos adaptativos que incluyen insulino-resistencia (IR), hiperlipidemia, hipercoagulabilidad, inflamación y un estado circulatorio hiperdinámico. Estos cambios se expresan de una forma exagerada en las mujeres que d...

  19. Automatic Radiometric Normalization of Multitemporal Satellite Imagery

    DEFF Research Database (Denmark)

    Canty, Morton J.; Nielsen, Allan Aasbjerg; Schmidt, Michael

    2004-01-01

    with normalization using orthogonal regression. The procedure is applied to Landsat TM images over Nevada, Landsat ETM+ images over Morocco, and SPOT HRV images over Kenya. Results from this new automatic, combined MAD/orthogonal regression method, based on statistical analysis of test pixels not used in the actual...

  20. Post-Normal science in practice

    NARCIS (Netherlands)

    Dankel, Dorothy J.; Vaage, Nora S.; van der Sluijs, Jeroen P.

    This special issue contains a selection of papers presented during the 2014 Bergen meeting, complemented with short perspectives by young PNS-inspired scholars, presented at a mini-symposium "Post-normal times? New thinking about science and policy advice" held on 21 October 2016 in celebration of

  1. Physical Development: What's Normal? What's Not?

    Science.gov (United States)

    ... Stages Listen Español Text Size Email Print Share Physical Development: What’s Normal? What’s Not? Page Content Article ... growth . The timing and speed of a child's physical development can vary a lot, because it is ...

  2. Visual attention and flexible normalization pools

    Science.gov (United States)

    Schwartz, Odelia; Coen-Cagli, Ruben

    2013-01-01

    Attention to a spatial location or feature in a visual scene can modulate the responses of cortical neurons and affect perceptual biases in illusions. We add attention to a cortical model of spatial context based on a well-founded account of natural scene statistics. The cortical model amounts to a generalized form of divisive normalization, in which the surround is in the normalization pool of the center target only if they are considered statistically dependent. Here we propose that attention influences this computation by accentuating the neural unit activations at the attended location, and that the amount of attentional influence of the surround on the center thus depends on whether center and surround are deemed in the same normalization pool. The resulting form of model extends a recent divisive normalization model of attention (Reynolds & Heeger, 2009). We simulate cortical surround orientation experiments with attention and show that the flexible model is suitable for capturing additional data and makes nontrivial testable predictions. PMID:23345413

  3. Achondroplasia in sibs of normal parents.

    Science.gov (United States)

    Philip, N; Auger, M; Mattei, J F; Giraud, F

    1988-01-01

    A new case of recurrent achondroplasia in sibs of normal parents is reported. Two sisters and a half sister were affected. Various mechanisms can be postulated to account for unexpected recurrence of achondroplasia in the same sibship. Germinal mosaicism and unstable premutation are discussed here. Images PMID:3236371

  4. Achondroplasia in sibs of normal parents.

    OpenAIRE

    Philip, N; Auger, M; Mattei, J F; Giraud, F

    1988-01-01

    A new case of recurrent achondroplasia in sibs of normal parents is reported. Two sisters and a half sister were affected. Various mechanisms can be postulated to account for unexpected recurrence of achondroplasia in the same sibship. Germinal mosaicism and unstable premutation are discussed here.

  5. Endoscopic third ventriculostomy in idiopathic normal pressure ...

    African Journals Online (AJOL)

    Mohammed Ahmed Eshra

    2013-12-22

    Dec 22, 2013 ... system of the brain causing ventricular enlargement. This is followed by gradual .... sion, not to decrease the pressure (which is already normal).8–15 ... So ETV must be performed in patients with clinical evolution of not more.

  6. Principal normal indicatrices of closed space curves

    DEFF Research Database (Denmark)

    Røgen, Peter

    1999-01-01

    A theorem due to J. Weiner, which is also proven by B. Solomon, implies that a principal normal indicatrix of a closed space curve with nonvanishing curvature has integrated geodesic curvature zero and contains no subarc with integrated geodesic curvature pi. We prove that the inverse problem alw...

  7. Normal tension glaucoma and Alzheimer disease

    DEFF Research Database (Denmark)

    Bach-Holm, Daniella; Kessing, Svend Vedel; Mogensen, Ulla Brasch

    2012-01-01

    Purpose: To investigate whether normal tension glaucoma (NTG) is associated with increased risk of developing dementia/Alzheimer disease (AD). Methods: A total of 69 patients with NTG were identified in the case note files in the Glaucoma Clinic, University Hospital of Copenhagen (Rigshospitalet...

  8. Normal stresses in semiflexible polymer hydrogels

    Science.gov (United States)

    Vahabi, M.; Vos, Bart E.; de Cagny, Henri C. G.; Bonn, Daniel; Koenderink, Gijsje H.; MacKintosh, F. C.

    2018-03-01

    Biopolymer gels such as fibrin and collagen networks are known to develop tensile axial stress when subject to torsion. This negative normal stress is opposite to the classical Poynting effect observed for most elastic solids including synthetic polymer gels, where torsion provokes a positive normal stress. As shown recently, this anomalous behavior in fibrin gels depends on the open, porous network structure of biopolymer gels, which facilitates interstitial fluid flow during shear and can be described by a phenomenological two-fluid model with viscous coupling between network and solvent. Here we extend this model and develop a microscopic model for the individual diagonal components of the stress tensor that determine the axial response of semiflexible polymer hydrogels. This microscopic model predicts that the magnitude of these stress components depends inversely on the characteristic strain for the onset of nonlinear shear stress, which we confirm experimentally by shear rheometry on fibrin gels. Moreover, our model predicts a transient behavior of the normal stress, which is in excellent agreement with the full time-dependent normal stress we measure.

  9. Comparative ultrasound measurement of normal thyroid gland ...

    African Journals Online (AJOL)

    2011-08-31

    Aug 31, 2011 ... the normal thyroid gland has a homogenous increased medium level echo texture. The childhood thyroid gland dimension correlates linearly with age and body surface unlike adults. [14] Iodothyronine (T3) and thyroxine (T4) are thyroid hormones which function to control the basal metabolic rate (BMR).

  10. Mast cell distribution in normal adult skin

    NARCIS (Netherlands)

    A.S. Janssens (Artiena Soe); R. Heide (Rogier); J.C. den Hollander (Jan); P.G.M. Mulder (P. G M); B. Tank (Bhupendra); A.P. Oranje (Arnold)

    2005-01-01

    markdownabstract__AIMS:__ To investigate mast cell distribution in normal adult skin to provide a reference range for comparison with mastocytosis. __METHODS:__ Mast cells (MCs) were counted in uninvolved skin adjacent to basal cell carcinomas and other dermatological disorders in adults.

  11. Normal sleep and its neurophysiological regulation

    NARCIS (Netherlands)

    Hofman, W.F.; Talamini, L.M.; Watson, R.R.

    2015-01-01

    Normal sleep consists of two states: NREM (light and deep sleep) and REM, alternating in a cyclical pattern. The sleep/wake rhythm is regulated by two processes: the sleep propensity, building up during wake, and the circadian rhythm, imposed by the suprachiasmatic nucleus. The arousal pathways in

  12. Named entity normalization in user generated content

    NARCIS (Netherlands)

    Jijkoun, V.; Khalid, M.A.; Marx, M.; de Rijke, M.

    2008-01-01

    Named entity recognition is important for semantically oriented retrieval tasks, such as question answering, entity retrieval, biomedical retrieval, trend detection, and event and entity tracking. In many of these tasks it is important to be able to accurately normalize the recognized entities,

  13. Morphological evaluation of normal human corneal epithelium

    DEFF Research Database (Denmark)

    Ehlers, Niels; Heegaard, Steffen; Hjortdal, Jesper

    2010-01-01

    of corneas from 100 consecutively selected paraffin-embedded eyes were stained with hematoxylin-eosin and Periodic Acid-Schiff (PAS). All specimens were evaluated by light microscopy. The eyes were enucleated from patients with choroidal melanoma. Corneas were considered to be normal. RESULTS: Ninety of 100...

  14. Dissociative Functions in the Normal Mourning Process.

    Science.gov (United States)

    Kauffman, Jeffrey

    1994-01-01

    Sees dissociative functions in mourning process as occurring in conjunction with integrative trends. Considers initial shock reaction in mourning as model of normal dissociation in mourning process. Dissociation is understood to be related to traumatic significance of death in human consciousness. Discerns four psychological categories of…

  15. Hemoglobin levels in normal Filipino pregnant women.

    Science.gov (United States)

    Kuizon, M D; Natera, M G; Ancheta, L P; Platon, T P; Reyes, G D; Macapinlac, M P

    1981-09-01

    The hemoglobin concentrations during pregnancy in Filipinos belonging to the upper income group, who were prescribed 105 mg elemental iron daily, and who had acceptable levels of transferrin saturation, were examined in an attempt to define normal levels. The hemoglobin concentrations for each trimester followed a Gaussian distribution. The hemoglobin values equal to the mean minus one standard deviation were 11.4 gm/dl for the first trimester and 10.4 gm/dl for the second and third trimesters. Using these values as the lower limits of normal, in one group of pregnant women the prevalence of anemia during the last two trimesters was found lower than that obtained when WHO levels for normal were used. Groups of women with hemoglobin of 10.4 to 10.9 gm/dl (classified anemic by WHO criteria but normal in the present study) and those with 11.0 gm/dl and above could not be distinguished on the basis of their serum ferritin levels nor on the degree of decrease in their hemoglobin concentration during pregnancy. Many subjects in both groups, however, had serum ferritin levels less than 12 ng/ml which indicate poor iron stores. It might be desirable in future studies to determine the hemoglobin cut-off point that will delineate subjects who are both non-anemic and adequate in iron stores using serum ferritin levels as criterion for the latter.

  16. Normalized compression distance of multisets with applications

    NARCIS (Netherlands)

    Cohen, A.R.; Vitányi, P.M.B.

    Pairwise normalized compression distance (NCD) is a parameter-free, feature-free, alignment-free, similarity metric based on compression. We propose an NCD of multisets that is also metric. Previously, attempts to obtain such an NCD failed. For classification purposes it is superior to the pairwise

  17. Limiting Normal Operator in Quasiconvex Analysis

    Czech Academy of Sciences Publication Activity Database

    Aussel, D.; Pištěk, Miroslav

    2015-01-01

    Roč. 23, č. 4 (2015), s. 669-685 ISSN 1877-0533 R&D Projects: GA ČR GA15-00735S Institutional support: RVO:67985556 Keywords : Quasiconvex function * Sublevel set * Normal operator Subject RIV: BA - General Mathematics Impact factor: 0.973, year: 2015 http://library.utia.cas.cz/separaty/2015/MTR/pistek-0453552.pdf

  18. The normal bacterial flora prevents GI disease

    Indian Academy of Sciences (India)

    First page Back Continue Last page Overview Graphics. The normal bacterial flora prevents GI disease. Inhibits pathogenic enteric bacteria. Decrease luminal pH; Secrete bacteriocidal proteins; Colonization resistance; Block epithelial binding – induce MUC2. Improves epithelial and mucosal barrier integrity. Produce ...

  19. Role of the normal gut microbiota.

    Science.gov (United States)

    Jandhyala, Sai Manasa; Talukdar, Rupjyoti; Subramanyam, Chivkula; Vuyyuru, Harish; Sasikala, Mitnala; Nageshwar Reddy, D

    2015-08-07

    Relation between the gut microbiota and human health is being increasingly recognised. It is now well established that a healthy gut flora is largely responsible for overall health of the host. The normal human gut microbiota comprises of two major phyla, namely Bacteroidetes and Firmicutes. Though the gut microbiota in an infant appears haphazard, it starts resembling the adult flora by the age of 3 years. Nevertheless, there exist temporal and spatial variations in the microbial distribution from esophagus to the rectum all along the individual's life span. Developments in genome sequencing technologies and bioinformatics have now enabled scientists to study these microorganisms and their function and microbe-host interactions in an elaborate manner both in health and disease. The normal gut microbiota imparts specific function in host nutrient metabolism, xenobiotic and drug metabolism, maintenance of structural integrity of the gut mucosal barrier, immunomodulation, and protection against pathogens. Several factors play a role in shaping the normal gut microbiota. They include (1) the mode of delivery (vaginal or caesarean); (2) diet during infancy (breast milk or formula feeds) and adulthood (vegan based or meat based); and (3) use of antibiotics or antibiotic like molecules that are derived from the environment or the gut commensal community. A major concern of antibiotic use is the long-term alteration of the normal healthy gut microbiota and horizontal transfer of resistance genes that could result in reservoir of organisms with a multidrug resistant gene pool.

  20. Perturbations of normally solvable nonlinear operators, I

    Directory of Open Access Journals (Sweden)

    William O. Ray

    1985-01-01

    Full Text Available Let X and Y be Banach spaces and let ℱ and be Gateaux differentiable mappings from X to Y In this note we study when the operator ℱ+ is surjective for sufficiently small perturbations of a surjective operator ℱ The methods extend previous results in the area of normal solvability for nonlinear operators.

  1. Normal forms of Hopf-zero singularity

    International Nuclear Information System (INIS)

    Gazor, Majid; Mokhtari, Fahimeh

    2015-01-01

    The Lie algebra generated by Hopf-zero classical normal forms is decomposed into two versal Lie subalgebras. Some dynamical properties for each subalgebra are described; one is the set of all volume-preserving conservative systems while the other is the maximal Lie algebra of nonconservative systems. This introduces a unique conservative–nonconservative decomposition for the normal form systems. There exists a Lie-subalgebra that is Lie-isomorphic to a large family of vector fields with Bogdanov–Takens singularity. This gives rise to a conclusion that the local dynamics of formal Hopf-zero singularities is well-understood by the study of Bogdanov–Takens singularities. Despite this, the normal form computations of Bogdanov–Takens and Hopf-zero singularities are independent. Thus, by assuming a quadratic nonzero condition, complete results on the simplest Hopf-zero normal forms are obtained in terms of the conservative–nonconservative decomposition. Some practical formulas are derived and the results implemented using Maple. The method has been applied on the Rössler and Kuramoto–Sivashinsky equations to demonstrate the applicability of our results. (paper)

  2. Normal forms of Hopf-zero singularity

    Science.gov (United States)

    Gazor, Majid; Mokhtari, Fahimeh

    2015-01-01

    The Lie algebra generated by Hopf-zero classical normal forms is decomposed into two versal Lie subalgebras. Some dynamical properties for each subalgebra are described; one is the set of all volume-preserving conservative systems while the other is the maximal Lie algebra of nonconservative systems. This introduces a unique conservative-nonconservative decomposition for the normal form systems. There exists a Lie-subalgebra that is Lie-isomorphic to a large family of vector fields with Bogdanov-Takens singularity. This gives rise to a conclusion that the local dynamics of formal Hopf-zero singularities is well-understood by the study of Bogdanov-Takens singularities. Despite this, the normal form computations of Bogdanov-Takens and Hopf-zero singularities are independent. Thus, by assuming a quadratic nonzero condition, complete results on the simplest Hopf-zero normal forms are obtained in terms of the conservative-nonconservative decomposition. Some practical formulas are derived and the results implemented using Maple. The method has been applied on the Rössler and Kuramoto-Sivashinsky equations to demonstrate the applicability of our results.

  3. Sample normalization methods in quantitative metabolomics.

    Science.gov (United States)

    Wu, Yiman; Li, Liang

    2016-01-22

    To reveal metabolomic changes caused by a biological event in quantitative metabolomics, it is critical to use an analytical tool that can perform accurate and precise quantification to examine the true concentration differences of individual metabolites found in different samples. A number of steps are involved in metabolomic analysis including pre-analytical work (e.g., sample collection and storage), analytical work (e.g., sample analysis) and data analysis (e.g., feature extraction and quantification). Each one of them can influence the quantitative results significantly and thus should be performed with great care. Among them, the total sample amount or concentration of metabolites can be significantly different from one sample to another. Thus, it is critical to reduce or eliminate the effect of total sample amount variation on quantification of individual metabolites. In this review, we describe the importance of sample normalization in the analytical workflow with a focus on mass spectrometry (MS)-based platforms, discuss a number of methods recently reported in the literature and comment on their applicability in real world metabolomics applications. Sample normalization has been sometimes ignored in metabolomics, partially due to the lack of a convenient means of performing sample normalization. We show that several methods are now available and sample normalization should be performed in quantitative metabolomics where the analyzed samples have significant variations in total sample amounts. Copyright © 2015 Elsevier B.V. All rights reserved.

  4. Refixation saccades with normal gain values

    DEFF Research Database (Denmark)

    Korsager, Leise Elisabeth Hviid; Faber, Christian Emil; Schmidt, Jesper Hvass

    2017-01-01

    -ocular reflex. However, this partial deficit is in conflict with the current way of interpreting vHIT results in which the vestibular function is classified as either normal or pathological based only on the gain value. Refixation saccades, which are evident signs of vestibulopathy, are not considered...

  5. Hypervascular liver lesions in radiologically normal liver

    Energy Technology Data Exchange (ETDEWEB)

    Amico, Enio Campos; Alves, Jose Roberto; Souza, Dyego Leandro Bezerra de; Salviano, Fellipe Alexandre Macena; Joao, Samir Assi; Liguori, Adriano de Araujo Lima, E-mail: ecamic@uol.com.br [Hospital Universitario Onofre Lopes (HUOL/UFRN), Natal, RN (Brazil). Clinica Gastrocentro e Ambulatorios de Cirurgia do Aparelho Digestivo e de Cirurgia Hepatobiliopancreatica

    2017-09-01

    Background: The hypervascular liver lesions represent a diagnostic challenge. Aim: To identify risk factors for cancer in patients with non-hemangiomatous hypervascular hepatic lesions in radiologically normal liver. Method: This prospective study included patients with hypervascular liver lesions in radiologically normal liver. The diagnosis was made by biopsy or was presumed on the basis of radiologic stability in follow-up period of one year. Cirrhosis or patients with typical imaging characteristics of haemangioma were excluded. Results: Eighty eight patients were included. The average age was 42.4. The lesions were unique and were between 2-5 cm in size in most cases. Liver biopsy was performed in approximately 1/3 of cases. The lesions were benign or most likely benign in 81.8%, while cancer was diagnosed in 12.5% of cases. Univariate analysis showed that age >45 years (p< 0.001), personal history of cancer (p=0.020), presence of >3 nodules (p=0.003) and elevated alkaline phosphatase (p=0.013) were significant risk factors for cancer. Conclusion: It is safe to observe hypervascular liver lesions in normal liver in patients up to 45 years, normal alanine amino transaminase, up to three nodules and no personal history of cancer. Lesion biopsies are safe in patients with atypical lesions and define the treatment to be established for most of these patients. (author)

  6. KERNEL MAD ALGORITHM FOR RELATIVE RADIOMETRIC NORMALIZATION

    Directory of Open Access Journals (Sweden)

    Y. Bai

    2016-06-01

    Full Text Available The multivariate alteration detection (MAD algorithm is commonly used in relative radiometric normalization. This algorithm is based on linear canonical correlation analysis (CCA which can analyze only linear relationships among bands. Therefore, we first introduce a new version of MAD in this study based on the established method known as kernel canonical correlation analysis (KCCA. The proposed method effectively extracts the non-linear and complex relationships among variables. We then conduct relative radiometric normalization experiments on both the linear CCA and KCCA version of the MAD algorithm with the use of Landsat-8 data of Beijing, China, and Gaofen-1(GF-1 data derived from South China. Finally, we analyze the difference between the two methods. Results show that the KCCA-based MAD can be satisfactorily applied to relative radiometric normalization, this algorithm can well describe the nonlinear relationship between multi-temporal images. This work is the first attempt to apply a KCCA-based MAD algorithm to relative radiometric normalization.

  7. Robust glint detection through homography normalization

    DEFF Research Database (Denmark)

    Hansen, Dan Witzner; Roholm, Lars; García Ferreiros, Iván

    2014-01-01

    A novel normalization principle for robust glint detection is presented. The method is based on geometric properties of corneal reflections and allows for simple and effective detection of glints even in the presence of several spurious and identically appearing reflections. The method is tested...

  8. Power curve report - with turbulence intensity normalization

    DEFF Research Database (Denmark)

    Gómez Arranz, Paula; Wagner, Rozenn; Vesth, Allan

    , additional shear and turbulence intensitity filters are applied on the measured data. Secondly, the method for normalization to a given reference turbulence intensity level (as described in Annex M of the draft of IEC 61400-12-1 Ed.2 [3]) is applied. The measurements have been performed using DTU...

  9. Accounting for the Benefits of Database Normalization

    Science.gov (United States)

    Wang, Ting J.; Du, Hui; Lehmann, Constance M.

    2010-01-01

    This paper proposes a teaching approach to reinforce accounting students' understanding of the concept of database normalization. Unlike a conceptual approach shown in most of the AIS textbooks, this approach involves with calculations and reconciliations with which accounting students are familiar because the methods are frequently used in…

  10. Selective attention in normal and impaired hearing.

    Science.gov (United States)

    Shinn-Cunningham, Barbara G; Best, Virginia

    2008-12-01

    A common complaint among listeners with hearing loss (HL) is that they have difficulty communicating in common social settings. This article reviews how normal-hearing listeners cope in such settings, especially how they focus attention on a source of interest. Results of experiments with normal-hearing listeners suggest that the ability to selectively attend depends on the ability to analyze the acoustic scene and to form perceptual auditory objects properly. Unfortunately, sound features important for auditory object formation may not be robustly encoded in the auditory periphery of HL listeners. In turn, impaired auditory object formation may interfere with the ability to filter out competing sound sources. Peripheral degradations are also likely to reduce the salience of higher-order auditory cues such as location, pitch, and timbre, which enable normal-hearing listeners to select a desired sound source out of a sound mixture. Degraded peripheral processing is also likely to increase the time required to form auditory objects and focus selective attention so that listeners with HL lose the ability to switch attention rapidly (a skill that is particularly important when trying to participate in a lively conversation). Finally, peripheral deficits may interfere with strategies that normal-hearing listeners employ in complex acoustic settings, including the use of memory to fill in bits of the conversation that are missed. Thus, peripheral hearing deficits are likely to cause a number of interrelated problems that challenge the ability of HL listeners to communicate in social settings requiring selective attention.

  11. Superconvergent sum rules for the normal reflectivity

    International Nuclear Information System (INIS)

    Furuya, K.; Zimerman, A.H.; Villani, A.

    1976-05-01

    Families of superconvergent relations for the normal reflectivity function are written. Sum rules connecting the difference of phases of the reflectivities of two materials are also considered. Finally superconvergence relations and sum rules for magneto-reflectivity in the Faraday and Voigt regimes are also studied

  12. Effects of pions on normal tissues

    International Nuclear Information System (INIS)

    Tokita, N.

    1981-01-01

    Verification of the uniform biological effectiveness of pion beams of various dimensions produced at LAMPF has been made using cultured mammalian cells and mouse jejunum. Normal tissue radiobiology studies at LAMPF are reviewed with regard to biological beam characterization for the therapy program and the current status of acute and late effect studies on rodents

  13. Normal equivariant forms of vector fields

    International Nuclear Information System (INIS)

    Sanchez Bringas, F.

    1992-07-01

    We prove a theorem of linearization of type Siegel and a theorem of normal forms of type Poincare-Dulac for germs of holomorphic vector fields in the origin of C 2 , Γ -equivariants, where Γ is a finite subgroup of GL (2,C). (author). 5 refs

  14. Challenging the Ideology of Normal in Schools

    Science.gov (United States)

    Annamma, Subini A.; Boelé, Amy L.; Moore, Brooke A.; Klingner, Janette

    2013-01-01

    In this article, we build on Brantlinger's work to critique the binary of normal and abnormal applied in US schools that create inequities in education. Operating from a critical perspective, we draw from Critical Race Theory, Disability Studies in Education, and Cultural/Historical Activity Theory to build a conceptual framework for…

  15. Estado nutricional de niños afectados por fisuras labiopalatinas

    Directory of Open Access Journals (Sweden)

    Carlos Evaristo Zamora Linares

    Full Text Available Objetivo: determinar la prevalencia de malnutrición en niños afectados por fisuras del labio asociadas a paladar hendido. Métodos: estudio descriptivo de tipo transversal. La muestra consistió en 86 pacientes de edad comprendida entre 1 y 15 años, que fueron atendidos en el Hospital Pediátrico "Hermanos Cordové" de Manzanillo, Cuba, entre 1995 y 2010. Resultados: predominó la desnutrición moderada, y los mayores índices se observaron en el grupo de menor edad. Conclusiones: la prevalencia de desnutrición en este grupo resultó menor que la encontrada en otras muestras tomadas de poblaciones "normales".

  16. Desempeño en funciones ejecutivas en escolares por subtipo de TDAH

    OpenAIRE

    Rodríguez Sánchez, Sandra Catalina

    2012-01-01

    El objetivo de esta investigación fue comparar el desempeño en tareas de funciones ejecutivas en niños y niñas en edad escolar según el subtipo de Trastorno por Déficit de Atención con Hiperactividad (TDAH): Hiperactivo-impulsivo (TDAH-H), inatento (TDAH-I) y combinado (TDAH-C), comparados con un grupo de niños normales. La muestra fue 40 escolares entre 7 y 12 años, estrato socioeconómico muy bajo y bajo. El diseño fue descriptivo, comparativo, transversal y el análisis fue no paramétrico. S...

  17. Vínculo entre estrés oxidativo y enfermedad por quemaduras

    OpenAIRE

    Rodríguez Rodríguez, Yoel; Beato Canfux, Abraham; García Sánchez, Maura

    2012-01-01

    Se realizó una revisión bibliográfica sobre el tema del estrés oxidativo; y se tuvieron en cuenta la fisiología normal de este mecanismo metabólico, las causas de su alteración y el daño que produce, cuando se descompensan los sistemas de defensa del organismo, con el objetivo de evidenciar el vínculo entre el daño oxidativo a las células y la fisiopatología de las lesiones producidas por quemaduras mayores, a partir del análisis de las fuentes bibliográficas nacionales e internacionales impr...

  18. Retinitis por citomegalovirus en un paciente con VIH

    Directory of Open Access Journals (Sweden)

    Alena de los Ángeles Vejerano Duany

    Full Text Available La retinitis por citomegalovirus es la infección ocular más frecuente en pacientes con un recuento de linfocitos CD4 inferior a 200 por µL. El aspecto oftalmoscópico de las lesiones se caracteriza, en la mayoría de los casos, por infiltrados retinianos resultados de la necrosis retiniana producida por citomegalovirus y el edema en asociación con hemorragias. Estas lesiones se disponen, por lo general, siguiendo las arcadas vasculares temporales con invasión hacia la mácula. Se presentó una paciente de 24 años de edad, femenina, blanca, ama de casa, con antecedentes patológicos personales oculares sin datos de interés, y antecedentes patológicos personales generales de ser diagnosticadas con VIH. Hace cuatro años que comenzó con tratamiento antirretroviral, y tuvo cambios de tratamiento en dos ocasiones. El último fue impuesto en mayo del año 2011, con el cual presentó mala adherencia terapéutica, y comenzó desde entonces a presentar disminución de su peso corporal de forma marcada en breve período de tiempo. Refiere que desde hace unos meses comenzó a presentar una disminución progresiva de la agudeza visual en el ojo derecho, acompañado de visión borrosa. Adquiere gran importancia este caso, ya que ante la supervivencia de los pacientes con sida, va a ser cada vez más frecuente la aparición de las afecciones oculares relacionadas con esta enfermedad. Dentro de ellas se encuentran las infecciones oportunistas mayores como la retinitis por citomegalovirus.

  19. Glymphatic MRI in idiopathic normal pressure hydrocephalus.

    Science.gov (United States)

    Ringstad, Geir; Vatnehol, Svein Are Sirirud; Eide, Per Kristian

    2017-10-01

    The glymphatic system has in previous studies been shown as fundamental to clearance of waste metabolites from the brain interstitial space, and is proposed to be instrumental in normal ageing and brain pathology such as Alzheimer's disease and brain trauma. Assessment of glymphatic function using magnetic resonance imaging with intrathecal contrast agent as a cerebrospinal fluid tracer has so far been limited to rodents. We aimed to image cerebrospinal fluid flow characteristics and glymphatic function in humans, and applied the methodology in a prospective study of 15 idiopathic normal pressure hydrocephalus patients (mean age 71.3 ± 8.1 years, three female and 12 male) and eight reference subjects (mean age 41.1 + 13.0 years, six female and two male) with suspected cerebrospinal fluid leakage (seven) and intracranial cyst (one). The imaging protocol included T1-weighted magnetic resonance imaging with equal sequence parameters before and at multiple time points through 24 h after intrathecal injection of the contrast agent gadobutrol at the lumbar level. All study subjects were kept in the supine position between examinations during the first day. Gadobutrol enhancement was measured at all imaging time points from regions of interest placed at predefined locations in brain parenchyma, the subarachnoid and intraventricular space, and inside the sagittal sinus. Parameters demonstrating gadobutrol enhancement and clearance in different locations were compared between idiopathic normal pressure hydrocephalus and reference subjects. A characteristic flow pattern in idiopathic normal hydrocephalus was ventricular reflux of gadobutrol from the subarachnoid space followed by transependymal gadobutrol migration. At the brain surfaces, gadobutrol propagated antegradely along large leptomeningeal arteries in all study subjects, and preceded glymphatic enhancement in adjacent brain tissue, indicating a pivotal role of intracranial pulsations for glymphatic function. In

  20. Psicofisiología del ansia por la comida y la bulimia nerviosa

    Directory of Open Access Journals (Sweden)

    Sonia Rodríguez

    2007-01-01

    Full Text Available El ansia por la comida es una experiencia normal no asociada necesariamente a conductas alimentarias patológicas. Sin embargo, en ocasiones, este deseo irresistible de consumir un determinado alimento puede convertirse en un antecedente inmediato del atracón. Los factores que tradicionalmente se han propuesto como posibles desencadenantes del atracón han sido los afectos negativos y la práctica de dietas restrictivas. No obstante, la mayoría de estudios realizados basados en medidas verbales no han podido establecer relaciones causales entre dichos factores y el atracón. Actualmente, estudios experimentales basados en medidas psicofisiológicas están permitiendo conocer cuáles son los mecanismos motivacionales implicados en el ansia por la comida, así como las complejas interacciones entre restricción, emoción, ansia y atracón. El presente trabajo resume los avances en el campo de la investigación básica que están abriendo nuevas vías para la prevención y el tratamiento psicológico de la bulimia nerviosa.

  1. Notas clínicas: un caso curioso de menstruación por el ombligo

    Directory of Open Access Journals (Sweden)

    Rafael Silva Gamboa

    1936-11-01

    Full Text Available Prudencia Lugo. 41 años. Soltera, Profesión: oficios domésticos. Hija de Domingo Lugo y Mercedes Suárez. Antecedentes hereditarios: Sin importancia, porque ignora de qué murieron los padres. Antecedentes personales: Ha padecido de sarampión, viruela y reumatismo articular; esta última novedad la redujo a la cama por el término de un mes y atacó numerosas articulaciones. La menstruación que apareció a los doce años, fue absolutamente normal hasta los veinte; de esta época en adelante sobrevinieron perturbaciones menstruales caracterizadas por dolores en la región lumbar y sensación de peso en la región hipogástrica, durante las reglas. Igualmente esta dismenorrea tenía otros caracteres como su irregularidad en la fecha de la aparición y su duración casi siempre exagerada. Da también como antecedentes la aparición de cólicos intestinales con alguna frecuencia, seguidos de la emisión de heces amarillentas y líquidas.

  2. Excreción de promastigotos de Leishmania pifanoi por Lutzomyia youngi experimentalmente infectada

    Directory of Open Access Journals (Sweden)

    Elina Rojas

    1995-12-01

    Full Text Available Se describe el desarrollo poblacional promastigótico de Leishmania pifanoi en Lutzomyia youngi experimentalmente infectada y mantenida con sacarosa al 50% bajo condiciones constantes de temperatura y humedad. Se reconocen dos etapas para la diferenciación y el crecimiento de los parásitos entre las dos y ciento veinte horas postprandiales. Hasta 48 horas tiene lugar la diferenciación pleomórfica de amastigotos en promastigotos cortos, que se multiplican por división binaria hasta las 60 horas, cuando ocurre la ruptura de la membrana peritrófica. La segunda etapa tiene lugar entre las 72 y 96 horas cuando algunos parásitos migran hacia la válvula esofágica y los demás parásitos libres son excretados en gotitas fecales como promastigotos grandes y activos. Las primeras gotitas excretadas dan reacción positiva a glucosa o contienen cristales de urato. El exceso de promastigotos de la segunda fase de desarrollo es eliminado en las últimas excretas que dan reacción positiva con las pruebas Hemoscreen y Biuret para proteínas totales y también para glucosa, y constituyen el 82% del total de gotas excretadas. La excreción de parásitos por Lu. youngi es fase normal del desarrollo de L. pifanoi en un vector.

  3. Cistitis por schistosoma haematobium, presentación de un caso

    Directory of Open Access Journals (Sweden)

    Ramón Zaragoza Durañona

    2014-08-01

    Full Text Available No es frecuente en nuestro medio la infección por Schistosoma. haematobium, pero existen todos los elementos de la triada ecológica para su transmisión. Se presenta el caso de un paciente masculino, de raza mestiza, con 46 años de edad y procedencia rural, que refiere dolores lumbares al orinar, disuria, tenesmo vesical y polaquiuria durante el último año. Al examen físico se encontró el abdomen discretamente doloroso a la palpación superficial y profunda en hipogastrio y fosas lumbares. Se trató como una infección urinaria sin mejoría. Los complementarios arrojaron discreta eosinofilia y reflujo vesicoureteral grado IV en la uretrocistografía retrógrada y miccional. La cistoscopia videoasistida reportó, a nivel del trígono, la mucosa vesical enrojecida con estructuras en forma de granos de arroz de aspecto puntiforme; la biopsia informó huevos de esquistosomas y cambios metaplásicos en el epitelio vesical. Se trató con praziquantel y desaparecieron los síntomas. A los seis meses los complementarios resultaron normales y el paciente está asintomático. Se concluye en la importancia de considerar la infección por Schistosoma haematobium entre los diagnósticos de la infección urinaria refractaria al tratamiento

  4. Excreción de promastigotos de Leishmania pifanoi por Lutzomyia youngi experimentalmente infectada

    Directory of Open Access Journals (Sweden)

    Rojas Elina

    1995-01-01

    Full Text Available Se describe el desarrollo poblacional promastigótico de Leishmania pifanoi en Lutzomyia youngi experimentalmente infectada y mantenida con sacarosa al 50% bajo condiciones constantes de temperatura y humedad. Se reconocen dos etapas para la diferenciación y el crecimiento de los parásitos entre las dos y ciento veinte horas postprandiales. Hasta 48 horas tiene lugar la diferenciación pleomórfica de amastigotos en promastigotos cortos, que se multiplican por división binaria hasta las 60 horas, cuando ocurre la ruptura de la membrana peritrófica. La segunda etapa tiene lugar entre las 72 y 96 horas cuando algunos parásitos migran hacia la válvula esofágica y los demás parásitos libres son excretados en gotitas fecales como promastigotos grandes y activos. Las primeras gotitas excretadas dan reacción positiva a glucosa o contienen cristales de urato. El exceso de promastigotos de la segunda fase de desarrollo es eliminado en las últimas excretas que dan reacción positiva con las pruebas Hemoscreen y Biuret para proteínas totales y también para glucosa, y constituyen el 82% del total de gotas excretadas. La excreción de parásitos por Lu. youngi es fase normal del desarrollo de L. pifanoi en un vector.

  5. ¿Por qué hay canciones que perduran?

    Directory of Open Access Journals (Sweden)

    Josune Albisu Barandiaran

    2015-11-01

    Full Text Available El principal objetivo de este artículo es analizar una canción, Txoria txori, para deducir cuales han sido las principales características que la han convertido en “Himno popular”, permitiéndola perdurar en el tiempo. Dentro de las principales características, dos han sido verdaderamente reseñables: por una parte, la plasticidad, y por otra, la sencillez y estructura clara de la canción.

  6. Responsabilidad civil por accidentes en espectáculos taurinos

    OpenAIRE

    Caballero Moreno, María Araceli

    2016-01-01

    El trabajo versa sobre la responsabilidad civil aplicada al campo de los espectáculos taurinos, explicando el régimen de responsabilidad aplicable, regulado en el art. 1.902 de nuestro Código Civil, centrándose especialmente en quién debe asumir la responsabilidad en caso de producirse daños a los espectadores del festejo por los propios animales, si la propia víctima por haber llevado a cabo una conducta imprudente aplicando la teoría de la asunción del riesgo o los organizadores del festejo...

  7. Mortalidad por paludismo en Colombia, 1979-2008

    OpenAIRE

    Pablo Chaparro; Julio Padilla

    2012-01-01

    Introducción. En Colombia, el paludismo representa un grave problema de salud pública. Se estima que, aproximadamente, 60 % de la población se encuentra en riesgo de enfermar o de morir por esta causa. Objetivo. Describir la tendencia de la mortalidad por paludismo en Colombia desde 1979 hasta 2008. Materiales y métodos. Se llevó a cabo un estudio descriptivo para determinar la tendencia de las tasas de mortalidad. Las fuentes de información fueron las bases de datos de las defunciones...

  8. Por qué todas las cuentas son falsas

    OpenAIRE

    Aerde, Michel van

    1994-01-01

    Los principales criterios para evaluación y decisión, en la sociedad actual, son inspirados por cálculos económicos. Mucho nos preocupamos de cuentas pero muy poco nos preguntamos de lo que es el dinero. Muy poco reflexionamos filosóficamente, ontológicamente, sobre la naturaleza misma del dinero. ¿Qué es esto que pretende ser la base de nuestra sociedad? El dinero es mentiroso por naturaleza. Es una representación de mucha vida, que no puede ser representada. El dinero es peligroso, se convi...

  9. Riesgos antrópicos generados por la actividad minera

    OpenAIRE

    Ana Violeta Argüello Mejía; Enriqueta Cantos Aguirre; Jorge Vitery Moya

    2013-01-01

    Las actividades productivas generan riesgos antrópicos [1] a mediano y largo plazo. La zona de estudio se ubica en las Parroquias de Pomasqui, San Antonio y Calacalí, donde se han producido riesgos debido a las actividades humanas, en este caso, por la explotación de las canteras para abastecer el mercado de la construcción del Distrito Metropolitano de Quito. La investigación propone determinar los riesgos antrópicos generados por la actividad minera. Los pobladores de la zona identifican qu...

  10. Elasticidad precio de la demanda por autopistas interurbanas en Chile

    OpenAIRE

    Rodrigo Sanes; German Lobos

    2013-01-01

    La efectividad de un esquema de tarificación vial para optimizar el uso de infraestructura de transporte depende de la información que se disponga respecto a la elasticidad precio de la demanda por el uso de puentes, túneles y carreteras. El objetivo de este trabajo es estimar la elasticidad precio de la demanda por el uso de autopistas interurbanas en Chile utilizando el método de regresiones aparentemente no relacionadas (SUR) y un panel de 48 datos mensuales obtenidos a partir de 21 plazas...

  11. Contractura axilar por quemadura tratada con Integra®

    OpenAIRE

    Roa G,Ricardo; Las Heras F,Rocío; Piñeros B,José L; Correa S,Gerardo; Norambuena B,Hernán; Marré N,Diego

    2011-01-01

    Las quemaduras axilares severas son un accidente infrecuente que evolucionan a la retracción generando deficiencias cosméticas y funcionales. Estas cicatrices son difíciles de tratar por las características anatómicas del área, donde la corrección de un vector de movimiento puede alterar otro. Objetivo: Mostrar nuestros resultados utilizando el sustituto cutáneo Integra® en el tratamiento de cicatrices retráctiles axilares por quemadura. Pacientes y Métodos: Se recolectaron antecedentes médic...

  12. Síndrome oculoglandular de Parinaud causada por esporotricose

    OpenAIRE

    Ribeiro,Alexandre Sampaio de Abreu; Bisol,Tiago; Menezes,Marcela Sant'Ana

    2010-01-01

    A síndrome oculoglandular de Parinaud é uma doença ocular rara causada por diferentes agentes etiológicos, entre eles bactérias, vírus e fungos. É caracterizada por uma conjuntivite granulomatosa, acompanhada de linfadenopatia pré-auricular adjacente e pode trazer sequelas caso não seja prontamente tratada. Neste artigo é relatado o caso de uma jovem técnica de enfermagem e estudante de medicina veterinária apresentando a síndrome oculoglandular de Parinaud causada pelo fungo Sporothrix schen...

  13. Mastitis bovina causada por Staphylococcus coagulasa negativos

    OpenAIRE

    Bonetto, César C.

    2014-01-01

    El presente Trabajo de Tesis se desprende como una línea de investigación del grupo de la UNRC dedicado al estudio de la problemática de la mastitis bovina tanto en aspectos básicos como aplicados con estudios genéticos, epidemiológicos y de virulencia de los principales microorganismos involucrados en la mastitis bovina. Staphylococccus coagulasa negativo (SCN) es un grupo bacteriano formado por varias especies que por lo general eran considerados flora oportunista de la piel y age...

  14. Una vuelta al mundo por la educación

    OpenAIRE

    Francisco Amat, Andrea; Molins, María

    2008-01-01

    La Barcelona World Race es una nueva regata vuelta al mundo con dos tripulantes por embarcación y sin escalas en ningún puerto. El pisto letazo de salida se dio el pasado 11 de noviem bre en el Port Olimpic de Barcelona, lugar a donde regresarán los navegantes tras recorrer 25.000 millas, es decir 47.000 kilómetros, por los océanos más hostiles y desafiantes del mundo en monocascos de última generación de la clase IMOCA Open 60. En esta primera edición, participan nueve equipos y uno de ellos...

  15. Neumonitis por hipersensibilidad en la ciudad de México

    Directory of Open Access Journals (Sweden)

    Carrillo-Rodríguez José G.

    2000-01-01

    Full Text Available OBJETIVO: Determinar la asociación entre la zona urbana de origen del paciente en la ciudad de México y la prevalencia de neumonitis por hipersensibilidad inducida por antígeno aviario. MATERIAL Y MÉTODOS: Se trata de un estudio de casos y controles realizado en el Instituto Nacional de Enfermedades Respiratorias, en la ciudad de México, en el año de 1999. Se estudiaron 109 casos con neumonitis por hipersensibilidad y 184 controles: de éstos, 39, con fibrosis pulmonar idiopática; 63, con tuberculosis pulmonar, y 82, con asma. La ciudad de México y las zonas conurbadas se dividieron en cinco zonas geográficas: centro, noreste, sureste, noroeste y el suroeste. Se calcularon las prevalencias de las diferentes enfermedades por zona urbana de los pacientes que participaron en el estudio; como medida de asociación, se estimó la razón de momios, con un intervalo de confianza al 95%. Asimismo, se realizó regresión logística múltiple ajustando por edad, sexo y estrato socioeconómico. RESULTADOS: Ochenta casos de neumonitis por hipersensibilidad se concentraron en el sur del noreste de las zonas conurbadas y la parte norte del sureste de la ciudad de México, 48 y 32, respectivamente (RM= 3.86, IC 95% 2.17-6.96. Treinta y seis controles de asma se localizaron en el suroeste de la ciudad de México, zona donde se ubica el Intituto Nacional de Enfermedades Respiratorias (p<0.05 y cuatro en la zona conurbada. Los controles de tuberculosis pulmonar y fibrosis pulmonar idiopática estuvieron dispersos en la ciudad de México y en las zonas conurbadas. CONCLUSIONES: La zona sur del noreste y el norte de la sureste están asociadas a la neumonitis por hipersensibilidad. Las causas de esta asociación no parece ser geográfica, pero existe el antecedente de que esa zona fue basurero de la ciudad, por lo que partículas orgánicas en el ambiente pudieran coadyuvar a la aparición de esta enfermedad.

  16. Laser asga effect on the normal anatomy of the temporo mandibular joint (TMJ) on the rabbit

    OpenAIRE

    Matamala V, Fernando; Cornejo U, Ricardo; Vasconcellos C, Adriana; Silva M, Héctor

    2009-01-01

    El láser blando o infrarrojo es utilizado en clínica veterinaria por sus efectos analgésicos, antiinflamatorios, bioestimulantes y curativos, a fin de tratar lesiones y mejorar el proceso de cicatrización. El presente estudio tiene como propósito evaluar el efecto del láser infrarrojo de AsGa (10miliwatt,780 nanómetros, 2joule/cm²) sobre la articulación témporo mandibular (ATM) de conejo, para determinar las alteraciones que produce este tipo de irradiación sobre los tejidos normales. Se util...

  17. Colour vision abnormality as the only manifestation of normal pressure hydrocephalus.

    Science.gov (United States)

    Asensio-Sánchez, V M; Martín-Prieto, A

    2018-01-01

    The case is presented of a 73-year-old male patient who referred to having black and white vision. Computed tomography showed normal pressure hydrocephalus (NPH). Magnetic resonance imaging was not performed because the patient refused to undergo further examinations. Achromatopsia may be the first or only NPH symptom. It may be prudent to ask patients with NPH regarding colour vision. Copyright © 2017 Sociedad Española de Oftalmología. Publicado por Elsevier España, S.L.U. All rights reserved.

  18. Las escuelas normales superiores y la feminización de la docencia en colombia

    OpenAIRE

    Montoya Palacio, Silvia Eugenia

    2013-01-01

    La feminización docente se evidencia en la presencia mayoritaria de las mujeres en el profesorado de la básica primaria, en la enseñanza de áreas específicas del conocimiento y en el imaginario social. La educación de las mujeres en Colombia, el papel de la formación normalista y la organización del trabajo docente por jornadas son factores de la feminización como proceso y realidad demográfica. Las Escuelas Normales Superiores durante los últimos diez años han reproducido el carácter femenin...

  19. Normalization for triple-target microarray experiments

    Directory of Open Access Journals (Sweden)

    Magniette Frederic

    2008-04-01

    Full Text Available Abstract Background Most microarray studies are made using labelling with one or two dyes which allows the hybridization of one or two samples on the same slide. In such experiments, the most frequently used dyes are Cy3 and Cy5. Recent improvements in the technology (dye-labelling, scanner and, image analysis allow hybridization up to four samples simultaneously. The two additional dyes are Alexa488 and Alexa494. The triple-target or four-target technology is very promising, since it allows more flexibility in the design of experiments, an increase in the statistical power when comparing gene expressions induced by different conditions and a scaled down number of slides. However, there have been few methods proposed for statistical analysis of such data. Moreover the lowess correction of the global dye effect is available for only two-color experiments, and even if its application can be derived, it does not allow simultaneous correction of the raw data. Results We propose a two-step normalization procedure for triple-target experiments. First the dye bleeding is evaluated and corrected if necessary. Then the signal in each channel is normalized using a generalized lowess procedure to correct a global dye bias. The normalization procedure is validated using triple-self experiments and by comparing the results of triple-target and two-color experiments. Although the focus is on triple-target microarrays, the proposed method can be used to normalize p differently labelled targets co-hybridized on a same array, for any value of p greater than 2. Conclusion The proposed normalization procedure is effective: the technical biases are reduced, the number of false positives is under control in the analysis of differentially expressed genes, and the triple-target experiments are more powerful than the corresponding two-color experiments. There is room for improving the microarray experiments by simultaneously hybridizing more than two samples.

  20. Fission cross-section normalization problems

    International Nuclear Information System (INIS)

    Wagemans, C.; Ghent Rijksuniversiteit; Deruytter, A.J.

    1983-01-01

    The present measurements yield σsub(f)-data in the neutron energy from 20 MeV to 30 keV directly normalized in the thermal region. In the keV-region these data are consistent with the absolute σsub(f)-measurements of Szabo and Marquette. For the secondary normalization integral I 2 values have been obtained in agreement with those of Gwin et al. and Czirr et al. which were also directly normalized in the thermal region. For the I 1 integral, however, puzzling low values have been obtained. This was also the case for σsub(f)-bar in neutron energy intervals containing strong resonances. Three additional measurements are planned to further investigate these observations: (i) maintaining the actual approx.2π-geometry but using a 10 B-foil for the neutron flux detection (ii) using a low detection geometry with a 10 B- as well as a 6 Li-flux monitor. Only after these measurements definite conclusions on the I 1 and I 2 integrals can be formulated and final σsub(f)-bar-values can be released. The present study also gives some evidence for a correlation between the integral I 2 and the neutron flux monitor used. The influence of a normalization via I 1 or I 2 on the final cross-section has been shown. The magnitude of possible normalization errors is illustrated. Finally, since 235 U is expected to be an ''easy'' nucleus (low α-activity high σsub(f)-values), there are some indications that the important discrepancies still present in 235 U(n,f) cross-section measurements might partially be due to errors in the neutron flux determination

  1. Spatial normalization of array-CGH data

    Directory of Open Access Journals (Sweden)

    Brennetot Caroline

    2006-05-01

    Full Text Available Abstract Background Array-based comparative genomic hybridization (array-CGH is a recently developed technique for analyzing changes in DNA copy number. As in all microarray analyses, normalization is required to correct for experimental artifacts while preserving the true biological signal. We investigated various sources of systematic variation in array-CGH data and identified two distinct types of spatial effect of no biological relevance as the predominant experimental artifacts: continuous spatial gradients and local spatial bias. Local spatial bias affects a large proportion of arrays, and has not previously been considered in array-CGH experiments. Results We show that existing normalization techniques do not correct these spatial effects properly. We therefore developed an automatic method for the spatial normalization of array-CGH data. This method makes it possible to delineate and to eliminate and/or correct areas affected by spatial bias. It is based on the combination of a spatial segmentation algorithm called NEM (Neighborhood Expectation Maximization and spatial trend estimation. We defined quality criteria for array-CGH data, demonstrating significant improvements in data quality with our method for three data sets coming from two different platforms (198, 175 and 26 BAC-arrays. Conclusion We have designed an automatic algorithm for the spatial normalization of BAC CGH-array data, preventing the misinterpretation of experimental artifacts as biologically relevant outliers in the genomic profile. This algorithm is implemented in the R package MANOR (Micro-Array NORmalization, which is described at http://bioinfo.curie.fr/projects/manor and available from the Bioconductor site http://www.bioconductor.org. It can also be tested on the CAPweb bioinformatics platform at http://bioinfo.curie.fr/CAPweb.

  2. Fusion and normalization to enhance anomaly detection

    Science.gov (United States)

    Mayer, R.; Atkinson, G.; Antoniades, J.; Baumback, M.; Chester, D.; Edwards, J.; Goldstein, A.; Haas, D.; Henderson, S.; Liu, L.

    2009-05-01

    This study examines normalizing the imagery and the optimization metrics to enhance anomaly and change detection, respectively. The RX algorithm, the standard anomaly detector for hyperspectral imagery, more successfully extracts bright rather than dark man-made objects when applied to visible hyperspectral imagery. However, normalizing the imagery prior to applying the anomaly detector can help detect some of the problematic dark objects, but can also miss some bright objects. This study jointly fuses images of RX applied to normalized and unnormalized imagery and has a single decision surface. The technique was tested using imagery of commercial vehicles in urban environment gathered by a hyperspectral visible/near IR sensor mounted in an airborne platform. Combining detections first requires converting the detector output to a target probability. The observed anomaly detections were fitted with a linear combination of chi square distributions and these weights were used to help compute the target probability. Receiver Operator Characteristic (ROC) quantitatively assessed the target detection performance. The target detection performance is highly variable depending on the relative number of candidate bright and dark targets and false alarms and controlled in this study by using vegetation and street line masks. The joint Boolean OR and AND operations also generate variable performance depending on the scene. The joint SUM operation provides a reasonable compromise between OR and AND operations and has good target detection performance. In addition, new transforms based on normalizing correlation coefficient and least squares generate new transforms related to canonical correlation analysis (CCA) and a normalized image regression (NIR). Transforms based on CCA and NIR performed better than the standard approaches. Only RX detection of the unnormalized of the difference imagery in change detection provides adequate change detection performance.

  3. Antibiótico antifungico produzido por um estreptomiceto da região de Araraquara

    Directory of Open Access Journals (Sweden)

    K. Ujikawa

    2009-01-01

    Full Text Available

    Normal" style="margin: 0cm 0cm 0pt; line-height: normal; text-align: justify; mso-layout-grid-align: none;"> Com o aumento significativo na incidência de infecções fúngicas invasivas durante a última década, principalmente em pacientes com câncer, AIDS, ou hospitalizados por período prolongado em unidades de terapia intensiva, há a necessidade da pesquisa de novos agentes antifúngicos com qualidade superior aos existentes. Esta pesquisa objetivou a procura de um microrganismo produtor de substâncias antibacterianas e antifúngicas. Microrganismos das amostras de solo da região de Araraquara, Brasil, foram coletados e analisados quanto ao seu potencial antimicrobiano contra microrganismos padrões (Staphylococcus aureus, Escherichia coli, Candida albicans, Aspergillus oryzae. Das 64 cepas isoladas, 34 apresentaram atividade antimicrobiana. A cepa Ar 4014 foi escolhida para dar continuidade ao trabalho por apresentar boa atividade antimicrobiana contra Candida albicans. Estudos fermentativos mostraram que os Meios 608-K e 602- B foram os melhores para produção e extração de substâncias antifúngicas de Ar 4014. Após cromatografia em coluna de sílica do extrato bruto, as frações ativas obtidas mostraram picos de absorção UV-VIS característicos de pentaenos normais. O antibiótico foi denominado provisoriamente Ara 4014-75. Palavras-chave: Antibiótico Ara 4014-75, Streptomyces, pentaenos, antifúngico, rastreamento.

  4. Correlação entre a fração inspirada de oxigênio, a pressão parcial de oxigênio materno e a pressão parcial de oxigênio fetal durante parto cesáreo em gestações normais Correlación entre la fracción inspirada de oxígeno, la presión parcial de oxígeno materno y la presión parcial de oxígeno fetal durante el parto por cesárea en embarazos normales Correlation between the inspired fraction of oxygen, maternal partial oxygen pressure, and fetal partial oxygen pressure during cesarean section of normal pregnancies

    Directory of Open Access Journals (Sweden)

    Carlos Henrique Viana de Castro

    2009-08-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Apesar das alterações na função pulmonar, a oxigenação materna se mantém nas anestesias regionais para obstetrícia. Mesmo assim, nessas situações, o fornecimento de oxigênio suplementar para a mãe é prática disseminada. A principal justificativa é a boa oxigenação fetal; entretanto, não há devida comprovação. Este estudo prospectivo e com distribuição randômica das pacientes teve o objetivo de testar a hipótese da existência ou não de correlação entre hiperóxia materna e elevação de parâmetros gasométricos fetais na cesariana eletiva. MÉTODO: Foram estudadas vinte pacientes grávidas, submetidas à raquianestesia, através de gasometrias arteriais, com diferentes frações inspiradas de oxigênio e correlacionadas com a gasometria fetal. RESULTADOS: O aumento da fração inspirada de oxigênio materno não se correlacionou com o aumento da pressão parcial de oxigênio fetal. CONCLUSÕES: A indução de hiperóxia materna através de oxigenoterapia suplementar não foi capaz de aumentar a pressão parcial de oxigênio no feto. Não houve modificação nos parâmetros gasométricos fetais, mesmo em caso de mudança desses parâmetros na parturiente, induzidos pela hiperóxia durante a cesariana sob raquianestesia.JUSTIFICATIVA Y OBJETIVOS: A pesar de las alteraciones en la función pulmonar, la oxigenación materna se mantiene en las anestesias regionales para obstetricia. Pero incluso así, en esas situaciones, el suministro de oxígeno suplementario para la madre se practica en forma diseminada. La principal justificación es la buena oxigenación fetal, sin embargo, no existe la debida comprobación al respecto. Este estudio prospectivo y con distribución randómica de las pacientes, tuvo el objetivo de comprobar la hipótesis de la existencia o no de una correlación entre la hiperoxia materna y la elevación de los parámetros gasométricos fetales en la cesárea por elecci

  5. On the transition to the normal phase for superconductors surrounded by normal conductors

    DEFF Research Database (Denmark)

    Fournais, Søren; Kachmar, Ayman

    2009-01-01

    For a cylindrical superconductor surrounded by a normal material, we discuss transition to the normal phase of stable, locally stable and critical configurations. Associated with those phase transitions, we define critical magnetic fields and we provide a sufficient condition for which those...

  6. Inheritance of Properties of Normal and Non-Normal Distributions after Transformation of Scores to Ranks

    Science.gov (United States)

    Zimmerman, Donald W.

    2011-01-01

    This study investigated how population parameters representing heterogeneity of variance, skewness, kurtosis, bimodality, and outlier-proneness, drawn from normal and eleven non-normal distributions, also characterized the ranks corresponding to independent samples of scores. When the parameters of population distributions from which samples were…

  7. Diseño de un banco de pruebas para el estudio de daños causados por fod’s - Design of a Test Bench for the Study of Damage Caused by Fod’s

    OpenAIRE

    Fabio Alejandro Merchán Rincón; David Steven Bocarejo Ibáñez; Jhoham Josué Rojas Pulido

    2017-01-01

    La industria Aeronáutica Colombiana actualmente está enfocada en la reparación de componentes, afectados por el impacto de objetos extraños durante su ciclo normal de vuelo, con el propósito de mantener una aeronavegabilidad continuada; por ello, es importante conocer los daños posibles que pueden ocurrir en la aeronave producto de su impacto con el objeto extraño (foD). por lo anterior, se diseñó un banco de pruebas que recreará los daños y afectaciones en la estructura, simulando el impacto...

  8. Normal gravity field in relativistic geodesy

    Science.gov (United States)

    Kopeikin, Sergei; Vlasov, Igor; Han, Wen-Biao

    2018-02-01

    Modern geodesy is subject to a dramatic change from the Newtonian paradigm to Einstein's theory of general relativity. This is motivated by the ongoing advance in development of quantum sensors for applications in geodesy including quantum gravimeters and gradientometers, atomic clocks and fiber optics for making ultra-precise measurements of the geoid and multipolar structure of the Earth's gravitational field. At the same time, very long baseline interferometry, satellite laser ranging, and global navigation satellite systems have achieved an unprecedented level of accuracy in measuring 3-d coordinates of the reference points of the International Terrestrial Reference Frame and the world height system. The main geodetic reference standard to which gravimetric measurements of the of Earth's gravitational field are referred is a normal gravity field represented in the Newtonian gravity by the field of a uniformly rotating, homogeneous Maclaurin ellipsoid of which mass and quadrupole momentum are equal to the total mass and (tide-free) quadrupole moment of Earth's gravitational field. The present paper extends the concept of the normal gravity field from the Newtonian theory to the realm of general relativity. We focus our attention on the calculation of the post-Newtonian approximation of the normal field that is sufficient for current and near-future practical applications. We show that in general relativity the level surface of homogeneous and uniformly rotating fluid is no longer described by the Maclaurin ellipsoid in the most general case but represents an axisymmetric spheroid of the fourth order with respect to the geodetic Cartesian coordinates. At the same time, admitting a post-Newtonian inhomogeneity of the mass density in the form of concentric elliptical shells allows one to preserve the level surface of the fluid as an exact ellipsoid of rotation. We parametrize the mass density distribution and the level surface with two parameters which are

  9. Uso das diretrizes para tratamento da úlcera por pressão por enfermeiros de um hospital geral

    Directory of Open Access Journals (Sweden)

    Elaine Maria Leite Rangel

    2009-03-01

    Full Text Available Este estudo objetivou identificar a freqüência do uso das diretrizes para o tratamento da úlcera por pressão(UP por enfermeiros de um hospital geral no interior do estado de São Paulo. É transversal de caráterdescritivo com análise quantitativa de dados. Amostra de 25 enfermeiros. Para a coleta de dados utilizou-se uminstrumento, construído a partir das diretrizes para o tratamento da UP. As questões foram relacionadas aostipos de intervenções usadas pelos enfermeiros para o tratamento da UP em estágio I, II, com necrose e comtecido de granulação. Para UP em estágio I, 24 (96% enfermeiros sempre realizavam a mudança de decúbito.Nas úlceras em estágio II a utilização de óleos vegetais na ferida era realizada sempre por 10 (40%enfermeiros e o curativo de hidrocolóide nunca era utilizado por 12 (57,1% enfermeiros. Em UP com necrose alimpeza com povidine era realizada por 4 (17,4% enfermeiros às vezes. Para o desbridamento, 16 (64% àsvezes utilizavam papaína e 15 (71,4% às vezes utilizavam colagenase. Em úlceras com tecido de granulaçãosempre era utilizado o soro fisiológico por 25 (100% enfermeiros. Houve variação nas práticas para otratamento da UP e falta de adesão às diretrizes.

  10. Deformation associated with continental normal faults

    Science.gov (United States)

    Resor, Phillip G.

    Deformation associated with normal fault earthquakes and geologic structures provide insights into the seismic cycle as it unfolds over time scales from seconds to millions of years. Improved understanding of normal faulting will lead to more accurate seismic hazard assessments and prediction of associated structures. High-precision aftershock locations for the 1995 Kozani-Grevena earthquake (Mw 6.5), Greece image a segmented master fault and antithetic faults. This three-dimensional fault geometry is typical of normal fault systems mapped from outcrop or interpreted from reflection seismic data and illustrates the importance of incorporating three-dimensional fault geometry in mechanical models. Subsurface fault slip associated with the Kozani-Grevena and 1999 Hector Mine (Mw 7.1) earthquakes is modeled using a new method for slip inversion on three-dimensional fault surfaces. Incorporation of three-dimensional fault geometry improves the fit to the geodetic data while honoring aftershock distributions and surface ruptures. GPS Surveying of deformed bedding surfaces associated with normal faulting in the western Grand Canyon reveals patterns of deformation that are similar to those observed by interferometric satellite radar interferometry (InSAR) for the Kozani Grevena earthquake with a prominent down-warp in the hanging wall and a lesser up-warp in the footwall. However, deformation associated with the Kozani-Grevena earthquake extends ˜20 km from the fault surface trace, while the folds in the western Grand Canyon only extend 500 m into the footwall and 1500 m into the hanging wall. A comparison of mechanical and kinematic models illustrates advantages of mechanical models in exploring normal faulting processes including incorporation of both deformation and causative forces, and the opportunity to incorporate more complex fault geometry and constitutive properties. Elastic models with antithetic or synthetic faults or joints in association with a master

  11. System design description for portable 1,000 CFM exhauster Skids POR-007/Skid E and POR-008/Skid F

    International Nuclear Information System (INIS)

    Nelson, O.D.

    1998-01-01

    The primary purpose of the two 1,000 CFM Exhauster Skids, POR-007-SKID E and POR-008-SKID F, is to provide backup to the waste tank primary ventilation systems for tanks 241-C-106 and 241-AY-102, and the AY-102 annulus in the event of a failure during the sluicing of tank 241-C-106 and subsequent transfer of sluiced waste to 241-AY-102. This redundancy is required since both of the tank ventilation systems have been declared as Safety Class systems

  12. Del significado responsabilidad de los socios en las compañías mercantiles por acciones y por cuotas.

    Directory of Open Access Journals (Sweden)

    Jorge Payome Suárez

    2003-01-01

    Full Text Available El comentario presentado, además de constituir una guía útil para los socios de compañías mercantiles por acciones y por cuotas, en un aspecto de indudable importancia para ellos, cual es el de su eventual responsabilidad, se erige como una herramienta provechosa para estudiantes y profesionales interesados en el tema. La experiencia académica y docente del autor del ensayo aseguran un análisis autorizado de la materia.

  13. La mortalidad por enfermedades del corazón y por reumatismo en la ciudad de bogotá

    OpenAIRE

    Bejarano, Jorge

    2012-01-01

    La alta cifra de mortalidad por enfermedades cardio-vasculares está indicando la urgencia de una campana para contener sus avances. De todas las adquisiciones sanitarias, ninguna ha tenido el alcance y los resultados admirables de los centros o dispensarios destinados al tratamiento de una enfermedad y a la educación del enfermo. Nadie podrá pues, dudar que los dispensarios o consultorios de enfermedades cardio-vasculares, sea una de las armas más eficaces en la lucha contra la mortalidad por...

  14. Signos Vitales de los CDC-Muertes por intoxicación por alcohol (Alcohol Poisoning Deaths)

    Centers for Disease Control (CDC) Podcasts

    2015-01-06

    Este podcast se basa en la edición de enero del 2015 del informe Signos Vitales de los CDC. En los Estados Unidos, mueren en promedio seis personas cada día debido a la intoxicación por alcohol. Infórmese sobre lo que puede hacer para prevenir los atracones de alcohol y las intoxicaciones por alcohol.  Created: 1/6/2015 by National Center for Chronic Disease Prevention and Health Promotion (NCCDPHP).   Date Released: 1/6/2015.

  15. Levantamiento del proceso de registros contables por causación de las cuentas por cobrar a clientes

    OpenAIRE

    Mayele-Rodríguez, Luz

    2013-01-01

    De igual forma el Proyecto de Mejora de Procesos a elaborar, desarrollar e implementar en el Área Administrativa y Financiera del Centro de Pinturas Automotriz “LMS”, es realizar el levantamiento del Proceso de Registros Contables por Causación de las cuentas por cobrar a clientes. Lo anterior se puede desarrollar a partir de un poder de negociación con proveedores que incluye entre otros los siguientes factores : El plazo alcanzado en la negociación de compras de insumos, materias primas, co...

  16. "Efecto del ingreso obtenido por el socio industrial por concepto de alimentos en la sociedad en nombre colectivo"

    OpenAIRE

    Adame Alba, Nayzeth

    2011-01-01

    Hoy en día la excesiva carga tributaria en nuestro país, nos obliga a buscar alternativas factibles y seguras, en el cumplimiento de las obligaciones fiscales, por ello, debemos aprovechar la existencia de figuras jurídicas útiles para la optimización de recursos financieros dentro del marco de ley, es el caso de la sociedad en nombre colectivo, que nos permite la existencia de socios industriales que a su vez, el ingreso que perciben por concepto de alimentos se encuentra exento de impuestos...

  17. Uso de la actividad colinesterasa para el diagnóstico de intoxicaciones por insecticidas organofosforados y carbamatos

    Directory of Open Access Journals (Sweden)

    Juan Pérez M.

    2012-08-01

    Full Text Available Objetivo. La medición de la actividad colinesterasa (ChE es una prueba rápida y económica que se emplea en el diagnóstico de intoxicaciones por insecticidas organofosforados y carbamatos. Como la interpretación por el laboratorio requiere valores de referencia para cada especie, en este estudio se establecieron las actividades de ChE normales en sangre, cerebro y retina de varias especies de animales domésticos mediante el método de Ellman. Materiales y métodos. Se obtuvieron encéfalos y globos oculares en el matadero central de Medellín, mientras que las muestras de sangre procedieron de animales remitidos al laboratorio de diagnóstico clínico de la Universidad de Antioquia. Resultados. Las medias (±D.E. de actividad ChE sanguínea, expresada en μmoles de acetiltiocolina iodada hidrolizada/min/mL, fueron de 2.4± 0.2, 1.5±0.3, 1.9±0.3 y 2.5±0.2 para caninos, felinos, equinos y bovinos, respectivamente. En el encéfalo, la actividad ChE (μmol/min/g peso fresco, fue de 4.0±0.4, 5.4 ±0.3 y 4.9±0.3, en bovinos, porcinos y caninos, respectivamente. La retina bovina mostró una actividad de 21.7±2.45 μmol/min/g. Conclusiones. Los valores obtenidos coinciden ampliamente con los reportados por laboratorios certificados por la Asociación Americana de Laboratorios de Diagnostico Veterinarios (AAVLD, corroborando la buena reproducibilidad de la técnica y validando su uso como apoyo al diagnóstico de intoxicaciones por insecticidas inhibidores de la colinesterasa.

  18. La elasticidad de la demanda por electricidad y la política energética

    Directory of Open Access Journals (Sweden)

    Alexander Galetovic

    2010-01-01

    Full Text Available En el análisis y la práctica de la política energética se suele suponer que la elasticidad de la demanda por energía eléctrica es irrelevante. Este trabajo muestra que durante episodios de escasez de energía una “pequeña” elasticidad basta para generar caídas “grandes” de la probabilidad de déficit y del costo del abastecimiento eléctrico. Esto se debe a que en la vecindad de la capacidad del sistema, la oferta de energía de corto plazo es cercana a vertical. Ilustramos nuestro punto cuantitativamente simulando la operación esperada del sistema eléctrico chileno durante los años de ajuste a la crisis causada por los cortes de gas argentinos, el periodo 2006-2010. Mostramos que el aumento de los precios causado por el retraso de las inversiones y los cortes de gas argentino, combinado con una “pequeña” elasticidad de la demanda mensual por energía (0.0548 en valor absoluto eran suficientes para reducir mucho la probabilidad de déficit mensual y retornarla a niveles normales. Más aún, si se soslaya el efecto de los mayores precios en el consumo, el costo marginal se sobreestima en 32% y el costo de operación esperado en 41 por ciento.

  19. La discapacidad entre poblaciones refugiadas y afectadas por conflictos

    OpenAIRE

    Reilly, Rachael

    2010-01-01

    La Comisión de Mujeres Refugiadas lanzó en el año 2007 un importante proyecto de investigación para evaluar la situación de las personas con discapacidad entre las poblaciones desplazadas o afectadas por conflictos.

  20. Rotura neumática de colon por aire comprimido

    OpenAIRE

    VITÓN H,REBECA; QUADROS B,PEDRO; RODRÍGUEZ M,JOSÉ ANTONIO

    2010-01-01

    La ruptura del colon causada por aire comprimido a alta presión es rara. A propósito de un caso se revisan los mecanismos de producción, tipos de roturas, clínica, diagnóstico y tratamiento de estos traumatismos.

  1. Endoftalmitis poscirugía de catarata por Sphingomonas paucimobilis

    Directory of Open Access Journals (Sweden)

    Omar Mauri Garrido

    Full Text Available Se presenta la caracterización y manejo terapéutico de un caso de endoftalmitis bacteriana posoperatoria causada por el germen Sphingomonas paucimobilis. La endoftalmitis es la inflamación de los tejidos intraoculares, considerada como la más devastadora de las complicaciones posoperatorias; posee pronóstico visual muy reservado y un elevado riesgo de secuela. Las Sphingomonas paucimobilis son bacterias gramnegativas con forma de bacilo, quimioheterótrofa y estrictamente aerobias que causan enfermedades en los seres humanos, principalmente infecciones hospitalarias que típicamente son tratadas fácilmente con antibióticos. Por sus capacidades biodegradantes y biosintéticas, son pocos los reportes hallados de infección intraocular por este germen. El pronóstico visual es favorable con un diagnóstico precoz y la aplicación del tratamiento adecuado. En este artículo se presentan un caso de endoftalmitis poscirugía de catarata por Sphingomonas paucimobilis reportado en Cuba en el mes de septiembre de 2009.

  2. Principais gestos esportivos executados por jogadores de handebol

    Directory of Open Access Journals (Sweden)

    Luiz Carlos Hespanhol Junior

    2012-09-01

    Full Text Available Este estudo teve como objetivo quantificar os principais gestos esportivos executados por jogadores profissionais de handebol. Para a mensuração quantitativa dos principais movimentos executados por cada jogador de handebol avaliado foram realizadas gravações de vídeo em todos os jogos. Foram realizados em média 1288,0 (DP = 190,7 gestos esportivos por jogo. Os armadores centrais realizaram em média 375,0 (DP = 83,7 gestos esportivos, e a posição de pivô 63,3 (DP = 21,2 gestos por jogo. As recepções e os passes foram os gestos mais executados, e a posição que mais realizou gestos esportivos na equipe de handebol avaliada foi o armador central, seguido do armador esquerdo e direito. O pivô foi a posição que menos realizou gestos esportivos.

  3. Algunos aspectos relacionados con las enfermedades tropicales transmitidas por moluscos

    Directory of Open Access Journals (Sweden)

    A. Mijail Pérez

    1999-12-01

    Full Text Available Muchas especies de moluscos son hospedantes de diversos parásitos que provocan infecciones muy serias e incluso mortales en seres humanos y ganado. La esquistosomiasis extendida por 74 países, infecta a unos 200 millones de personas y está en segundo lugar, después de la malaria, como causa de la mortalidad humana originada por parásitos. La infección es causada por un platelminto que se desarrolla en caracoles de agua dulce y que desde el agua puede penetrar en la piel de un ser humano y desarrollarse dentro de sus órganos, produciendo distintos grados de infección, hasta provocar la muerte. Distintas especies de esos caracoles están extendidas por Centro América. El cólera, otra enfermedad que también es mortal, se ha encontrado en moluscos bivalvos comestibles colectados en el Golfo de Nicoya, que bordea Nicaragua y Costa Rica Estas epidemias se pueden combatir con diversos métodos de control de los caracoles hospedantes de parásitos.

  4. Relatos cortos escritos por mujeres en el siglo XIX

    Directory of Open Access Journals (Sweden)

    Marta Giné

    2014-04-01

    Full Text Available A propósito de la obra editada por Concepción Palacios y Pedro Méndez, Femmes nouvellistes françaises du XIXesiècle(Berna, Peter Lang, coll. « Espacios literarios en contacto », vol. 4, 2013, 366 p. ISBN: 978-3-0343-1409-1.

  5. Immunogenicity of meningococcal PorA antigens in OMV vaccines

    NARCIS (Netherlands)

    Luijkx, T.A.

    2006-01-01

    For the prevention of meningococcal infection caused by group B meningococci, the Netherlands Vaccine Institute (NVI) has developed a hexavalent Porin A (PorA) based Outer Membrane Vesicle (OMV) vaccine (Hexamen). In various clinical studies with HexaMen, differences in the immune responses to the

  6. Celulitis por Microascus trigonosporus(anamorfo Scopulariopsis trigonospora

    Directory of Open Access Journals (Sweden)

    DELIA CANLE CORTIÑAS

    2013-06-01

    Full Text Available Resumen: Microascus trigonosporus ( anamorfo Scopulariopsis trigonospora es un hongo filamentoso ubicuo que se encuentra en el suelo , plumas de aves, material vegetal e insectos. Aunque Scopulariopsis spp se consideran comúnmente hongos contaminantes , pueden causar ocasionalmente infecciones en humanos, en especial onicomicosis . Excepcionalmente se han descrito infecciones de piel, abscesos cerebrales, endocarditis ,sinusitis e infecciones diseminadas por Scopulariopsis spp , casi siempre en pacientes inmunodeprimidos . En los últimos años se han publicado un mayor número de casos de infecciones oportunistas por Scopulariopsis spp y otros hialohifomicetos multiresistentes. Todavía no está establecido cuál es el mejor régimen de tratamiento para las infecciones por Scopulariopsis spp. Presentamos un caso excepcional de celulitis por Microascus trigonosporus en un paciente con tratamiento prolongado con corticoides. Abstract: Microascus trigonosporus ( Anamorph Scopulariopsis trigonospora is a cosmopolitan filamentous fungus that inhabits soil, feathers ,plant material and insects. While Scopulariopsis is commonly considered as a contaminat fungus it may cause occasionally infections in humans ,especially onychomycosis .Skin lesions, brain abscess , endocarditis, sinusitis and disseminated infections due to Scopulariopsis species have been rarely reported , usually in immunocompromised patients . Over the last few years opportunistic infections by Scopulariopsis species and others multi-resistant hyalohyphomycetes have been increasingly reported . No clear treatment regimen for Scopulariopsis species infections has been established yet. We present a exceptional case of cellulitis due to Microascus trigonosporus in a patient with prolonged steroid therapy.

  7. Analisis cualitativo asistido por computadora Computer-assisted qualitative analysis

    Directory of Open Access Journals (Sweden)

    César A. Cisneros Puebla

    2003-01-01

    Full Text Available Los objetivos de este ensayo son: por un lado, presentar una aproximación a la experiencia hispanoamericana en el Análisis Cualitativo Asistido por Computadora (ACAC al agrupar mediante un ejercicio de sistematización los trabajos realizados por diversos colegas provenientes de disciplinas afines. Aunque hubiese querido ser exhaustivo y minucioso, como cualquier intento de sistematización de experiencias, en este ejercicio son notables las ausencias y las omisiones. Introducir algunas reflexiones teóricas en torno al papel del ACAC en el desarrollo de la investigación cualitativa a partir de esa sistematización y con particular énfasis en la producción del dato es, por otro lado, objetivo central de esta primera aproximación.The aims of this article are: on the one hand, to present an approximation to the Hispano-American experience on Computer-Assisted Qualitative Data Analysis (CAQDAS, grouping as a systematization exercise the works carried out by several colleagues from related disciplines. Although attempting to be exhaustive and thorough - as in any attempt at systematizing experiences - this exercise presents clear lacks and omissions. On the other hand, to introduce some theoretical reflections about the role played by CAQDAS in the development of qualitative investigation after that systematization, with a specific focus on data generation.

  8. Muerte cerebral causada por consumo de psicofármacos

    OpenAIRE

    Iglesias Rozas, José Rafael, 1942-

    1987-01-01

    Tres imágenes de una biopsia de un cerebro en estado de muerte cerebral causada por consumo de psicofármacos. Three pictures of a biopsy of a brain that has died because of consumption of psychoactive drugs.

  9. Violência e mortes por causas externas

    Directory of Open Access Journals (Sweden)

    Graciete Oliveira Vieira

    2003-02-01

    Full Text Available Através de um estudo ecológico caracterizou-se a violência e as mortes por causas externas em Salvador e Bahia utilizando-se dados da Fundação Nacional de Saúde-Ministério da Saúde, dos registros de mortalidade e das estimativas populacionais do IBGE. O risco de morrer por homicídio no Brasil é 3 vezes o do Estados Unidos, chegando a ser 40 vezes superior ao do Japão. Homicídio foi a primeira causa de anos potenciais de vidas perdidos (13,4% no Brasil (1997, seguido por acidentes de trânsito (10,6%. Causas externas foi a segunda causa de morte em Salvador e Bahia (1996. A violência tem raízes sócio-culturais e político-ideológicas e pode ser prevenida por ações intersetoriais e multidisciplinares.

  10. The variability problem of normal human walking

    DEFF Research Database (Denmark)

    Simonsen, Erik B; Alkjær, Tine

    2012-01-01

    Previous investigations have suggested considerable inter-individual variability in the time course pattern of net joint moments during normal human walking, although the limited sample sizes precluded statistical analyses. The purpose of the present study was to obtain joint moment patterns from...... a group of normal subjects and to test whether or not the expected differences would prove to be statistically significant. Fifteen healthy male subjects were recorded on video while they walked across two force platforms. Ten kinematic and kinetic parameters were selected and input to a statistical...... cluster analysis to determine whether or not the 15 subjects could be divided into different 'families' (clusters) of walking strategy. The net joint moments showed a variability corroborating earlier reports. The cluster analysis showed that the 15 subjects could be grouped into two clusters of 5 and 10...

  11. Autobiographical Memory in Normal Ageing and Dementia

    Directory of Open Access Journals (Sweden)

    Harvey J. Sagar

    1991-01-01

    Full Text Available Autobiographical memories in young and elderly normal subjects are drawn mostly from the recent past but elderly subjects relate a second peak of memories from early adulthood. Memory for remote past public events is relatively preserved in dementia, possibly reflecting integrity of semantic relative to episodic memory. We examined recall of specific, consistent autobiographical episodes in Alzheimer's disease (AD in response to cue words. Patients and control subjects drew most memories from the recent 20 years: episode age related to anterograde memory function but not subject age or dementia. Subjects also related a secondary peak of memories from early adulthood; episode age related to subject age and severity of dementia. The results suggest that preferential recall of memories from early adulthood is based on the salience of retrieval cues, altered by age and dementia, superimposed on a temporal gradient of semantic memory. Further, AD shows behavioural similarity to normal ageing.

  12. A Proposed Arabic Handwritten Text Normalization Method

    Directory of Open Access Journals (Sweden)

    Tarik Abu-Ain

    2014-11-01

    Full Text Available Text normalization is an important technique in document image analysis and recognition. It consists of many preprocessing stages, which include slope correction, text padding, skew correction, and straight the writing line. In this side, text normalization has an important role in many procedures such as text segmentation, feature extraction and characters recognition. In the present article, a new method for text baseline detection, straightening, and slant correction for Arabic handwritten texts is proposed. The method comprises a set of sequential steps: first components segmentation is done followed by components text thinning; then, the direction features of the skeletons are extracted, and the candidate baseline regions are determined. After that, selection of the correct baseline region is done, and finally, the baselines of all components are aligned with the writing line.  The experiments are conducted on IFN/ENIT benchmark Arabic dataset. The results show that the proposed method has a promising and encouraging performance.

  13. Zero cosmological constant from normalized general relativity

    International Nuclear Information System (INIS)

    Davidson, Aharon; Rubin, Shimon

    2009-01-01

    Normalizing the Einstein-Hilbert action by the volume functional makes the theory invariant under constant shifts in the Lagrangian. The associated field equations then resemble unimodular gravity whose otherwise arbitrary cosmological constant is now determined as a Machian universal average. We prove that an empty space-time is necessarily Ricci tensor flat, and demonstrate the vanishing of the cosmological constant within the scalar field paradigm. The cosmological analysis, carried out at the mini-superspace level, reveals a vanishing cosmological constant for a universe which cannot be closed as long as gravity is attractive. Finally, we give an example of a normalized theory of gravity which does give rise to a non-zero cosmological constant.

  14. Suitable Image Intensity Normalization for Arterial Visualization

    Directory of Open Access Journals (Sweden)

    Yara Omran

    2012-12-01

    Full Text Available Ultrasonic imaging is a widely used non-invasivemedical imaging procedure since it is economical, comparativelysafe, portable and adaptable. However, one of its main weaknessesis the poor quality of images, which makes the enhancementof image quality an important issue in order to have a moreaccurate diagnose of the disease, or for the transformation of theimage through telemedicine channel and in many other imageprocessing tasks [1]. The purpose of this paper is to automaticallyenhance the image quality after the automatic detection of theartery wall. This step is essential before subsequent measurementsof arterial parameters [9]. This was performed automaticallyby applying linear normalization, where results showedthat normalization of ultra sound images is an important step inenhancing the image quality for later processing. In comparisonwith other methods, our method is automatic. The evaluationof image quality was done mathematically by comparing pixelintensities of images before and after enhancement, in additionto a visual evaluation.

  15. Normal anatomical measurements in cervical computerized tomography

    International Nuclear Information System (INIS)

    Zaunbauer, W.; Daepp, S.; Haertel, M.

    1985-01-01

    Radiodiagnostically relevant normal values and variations for measurements of the cervical region, the arithmetical average and the standard deviation were determined from adequate computer tomograms on 60 healthy women and men, aged 20 to 83 years. The sagittal diameter of the prevertebral soft tissue and the lumina of the upper respiratory tract were evaluated at exactly defined levels between the hyoid bone and the incisura jugularis sterni. - The thickness of the aryepiglottic folds, the maximal sagittal and transverse diameters of the thyroid gland and the calibre of the great cervical vessels were defined. - To assess information about laryngeal function in computerized tomography, measurements of distances between the cervical spine and anatomical fixed points of the larynx and hypopharynx were made as well as of the degree of vocal cord movement during normal respiration and phonation. (orig.) [de

  16. Broad Ligament Haematoma Following Normal Vaginal Delivery.

    Science.gov (United States)

    Ibrar, Faiza; Awan, Azra Saeed; Fatima, Touseef; Tabassum, Hina

    2017-01-01

    A 37-year-old, patient presented in emergency with history of normal vaginal delivery followed by development of abdominal distention, vomiting, constipation for last 3 days. She was para 4 and had normal vaginal delivery by traditional birth attendant at peripheral hospital 3 days back. Imaging study revealed a heterogeneous complex mass, ascites, pleural effusion, air fluid levels with dilatation gut loops. Based upon pelvic examination by senior gynaecologist in combination with ultrasound; a clinical diagnosis of broad ligament haematoma was made. However, vomiting and abdominal distention raised suspicion of intestinal obstruction. Due to worsening abdominal distention exploratory laparotomy was carried out. It was pseudo colonic obstruction and caecostomy was done. Timely intervention by multidisciplinary approach saved patient life with minimal morbidity.

  17. Sphalerons, deformed sphalerons and normal modes

    International Nuclear Information System (INIS)

    Brihaye, Y.; Kunz, J.; Oldenburg Univ.

    1992-01-01

    Topological arguments suggest that tha Weinberg-Salam model posses unstable solutions, sphalerons, representing the top of energy barriers between inequivalent vacua of the gauge theory. In the limit of vanishing Weinberg angle, such unstable solutions are known: the sphaleron of Klinkhamer and Manton and at large values of the Higgs mass in addition the deformed sphalerons. Here a systematic study of the discrete normal modes about these sphalerons for the full range Higgs mass is presented. The emergence of deformed sphalerons at critical values of the Higgs mass is seem to be related to the crossing of zero of the eigenvalue of the particular normal modes about the sphaleron. 6 figs., 1 tab., 19 refs. (author)

  18. Normalizing the causality between time series

    Science.gov (United States)

    Liang, X. San

    2015-08-01

    Recently, a rigorous yet concise formula was derived to evaluate information flow, and hence the causality in a quantitative sense, between time series. To assess the importance of a resulting causality, it needs to be normalized. The normalization is achieved through distinguishing a Lyapunov exponent-like, one-dimensional phase-space stretching rate and a noise-to-signal ratio from the rate of information flow in the balance of the marginal entropy evolution of the flow recipient. It is verified with autoregressive models and applied to a real financial analysis problem. An unusually strong one-way causality is identified from IBM (International Business Machines Corporation) to GE (General Electric Company) in their early era, revealing to us an old story, which has almost faded into oblivion, about "Seven Dwarfs" competing with a giant for the mainframe computer market.

  19. Normal modes of vibration in nickel

    Energy Technology Data Exchange (ETDEWEB)

    Birgeneau, R J [Yale Univ., New Haven, Connecticut (United States); Cordes, J [Cambridge Univ., Cambridge (United Kingdom); Dolling, G; Woods, A D B

    1964-07-01

    The frequency-wave-vector dispersion relation, {nu}(q), for the normal vibrations of a nickel single crystal at 296{sup o}K has been measured for the [{zeta}00], [{zeta}00], [{zeta}{zeta}{zeta}], and [0{zeta}1] symmetric directions using inelastic neutron scattering. The results can be described in terms of the Born-von Karman theory of lattice dynamics with interactions out to fourth-nearest neighbors. The shapes of the dispersion curves are very similar to those of copper, the normal mode frequencies in nickel being about 1.24 times the corresponding frequencies in copper. The fourth-neighbor model was used to calculate the frequency distribution function g({nu}) and related thermodynamic properties. (author)

  20. Mortalidad por envenenamiento en niños

    Directory of Open Access Journals (Sweden)

    Híjar Martha

    1998-01-01

    Full Text Available Objetivo. Conocer el panorama de las muertes por envenenamiento en niños de 0-14 años ocurridas en la República mexicana, entre 1979 y 1994. Material y métodos. Se utilizaron fuentes secundarias. Las variables analizadas fueron: edad, sexo, año, causa externa de traumatismos y envenenamientos, de la IX Clasificación Internacional de Enfermedades: E850-E858, E860-E869 y E905. Mediante un modelo de regresión Poisson se analizaron tendencias por causa específica y se obtuvieron riesgos relativos según edad, sexo y entidad federativa. Resultados. Hubo un total de 11 272 defunciones en menores de 15 años; las principales causas fueron el envenenamiento y las reacciones tóxicas causadas por plantas y animales venenosos (E905, el envenenamiento accidental por gas de uso doméstico y por monóxido de carbono (E868 y el envenenamiento accidental por otras drogas (E858. El grupo de edad que presentó los mayores riesgos, para las causas mencionadas, fue el de menores de un año con un riesgo relativo (RR de 29.6, IC95% 29.2-33.4; RR 3.47, IC95% 2.86-4.22, y RR 31.86, IC95% 24.8-40.9. El riesgo fue similar en ambos sexos, salvo para la causa E905. El estado de Aguascalientes se situó sistemáticamente entre los de mayor riesgo para todas las causas analizadas, mientras que Nuevo León siempre se ubicó entre los de riesgo más bajo. Conclusiones. El envenenamiento constituye una importante causa de muerte en los niños; el riesgo se incrementa al disminuir la edad. Considerando que esas muertes son potencialmente evitables y que la mayor parte de los envenenamientos ocurren en el hogar, para prevenirlos, se recomienda a los familiares vigilar y mantener fuera de peligro al niño. Por otra parte, la multicausalidad del fenómeno requiere que su prevención se realice desde una perspectiva multidisciplinaria que genere una cultura y un ambiente de seguridad en la sociedad.

  1. Mortalidade por leucemias relacionada à industrialização

    Directory of Open Access Journals (Sweden)

    Leal Carmen Helena Seoane

    2002-01-01

    Full Text Available OBJETIVO: Analisar a distribuição espacial da mortalidade por leucemia na população, buscando identificar agregados e estabelecer sua relação com os níveis de industrialização. MÉTODOS: O estudo foi realizado nas 43 regiões de governo do Estado de São Paulo, no qüinqüênio 1991-1995. Foi construído um "índice de industrialização relativo à leucemia" (IIRL baseado no número de indústrias e empregos industriais por 100.000 habitantes, valor adicionado fiscal, variedade de ramos industriais e indústrias com potenciais exposições de risco para a leucemia. O IIRL foi distribuído em cinco categorias. Verificaram-se os coeficientes padronizados de mortalidade por leucemia em cada uma das regiões, também distribuídos em cinco categorias e comparados ao mapa IIRL. RESULTADOS: As regiões mais industrializadas em ordem decrescente foram Campinas, Piracicaba, Jundiaí, Sorocaba e São Paulo. Não foi encontrada associação entre mortalidade, por nenhum tipo de leucemia, e industrialização. A região de Jales foi a que apresentou o mais alto coeficiente padronizado de mortalidade por leucemia. CONCLUSÕES: A distribuição da mortalidade por leucemia ocorreu de forma homogênea no Estado de São Paulo, não apresentando correlação com o nível de industrialização. Entretanto, aspectos relacionados ao método epidemiológico adotado -- estudo ecológico -- e ao uso do parâmetro "mortalidade por leucemia", doença cujo prognóstico tem mudado muito nas últimas décadas, limitaram a interpretação dos resultados.

  2. Transmisión de Anaplasma marginale por garrapatas

    Directory of Open Access Journals (Sweden)

    Kelly A. Brayton

    2012-01-01

    Full Text Available Anaplasma marginale, patógeno de distribución mundial, es transmitido por garrapatas Ixódidas. Comprender su complejo desarrollo dentro de la garrapata vector, permitirá la predicción de brotes y ofrecerá oportunidades para controlar su transmisión. En este trabajo se revisa su ciclo básico de desarrollo junto con los estudios recientes acerca de las diferencias de transmisión entre cepas, que delinean aspectos de la interacción patógeno - vector. Bacterias, virus o protozoarios transmitidos por artrópodos causan enfermedades severas, tanto en humanos como en animales. Las enfermedades infecciosas transmitidas por garrapatas, entre las que incluimos a la Anaplasmosis (A. marginale, babesiosis (Babesia bigemina, B. bovis, B. divergens y Theileriosis (Theileria annulata, T. parva, se encuentran entre las más importantes en el ámbito mundial, con pérdidas cercanas a los siete mil millones de dólares anualmente; y, a pesar de su impacto, permanecen escasamente bajo control, basado primordialmente en la aplicación de acaricidas, para interrumpir su transmisión. La aparición de garrapatas resistentes a múltiples sustancias acaricidas, representa una amenaza en este tipo de control y, como resultado, hay un resurgimiento de la investigación para el desarrollo de nuevas estrategias para su control. Nuevas opciones para prevenir la transmisión de patógenos de animales por garrapatas, será el resultado de entender las interacciones garrapata patógeno; proceso que culmina con el desarrollo de la infección y transmisión exitosa. En todos los casos de patógenos transmitidos por garrapatas, el desarrollo de la infección se realiza coordinamente a los momentos de adhesión y alimentación del vector sobre el animal. Esto sucede por la interdependencia en la señalización entre el patógeno y el vector al alimentarse y, por ello, será susceptible de intervención.

  3. Absceso mamario no puerperal por Finegoldia magna Nonpuerperal breast abscess caused by Finegoldia magna

    Directory of Open Access Journals (Sweden)

    L. Castello

    2007-06-01

    Full Text Available Finegoldia magna son cocos gram-positivos anaerobios estrictos, cuyas células se disponen en pares, tétradas y acúmulos. Forman parte de la flora normal de la piel, tractos gastrointestinal y genitourinario femeninos, y cavidad oral. La especie se caracteriza por ser asacarolítica y su principal fuente de energía la constituyen aminoácidos y peptonas. Por lo general se la aísla en cultivos polimicrobianos a partir de abscesos y otras infecciones de piel y partes blandas, huesos y articulaciones. En el caso descrito, F. magna fue recuperada en cultivo monomicrobiano, a partir de un absceso mamario no puerperal, que se agrega a los dos casos comunicados en la literatura. La identificación se realizó mediante la determinación de la sensibilidad a los discos de potencia especial, pruebas convencionales, y producción de enzimas sacarolíticas y proteol��ticas. Se efectuó la prueba de sensibilidad a los antimicrobianos por el método epsilométrico. Los agentes ensayados y los valores de CIM (µg/ml obtenidos fueron: penicilina, 0,064; cefalotina, 1; metronidazol, 0,25; minociclina, Finegoldia magna is a species of strictly anaerobic gram-positive cocci, arranged in pairs, tetrads, and clusters. These organisms are components of the normal flora of the skin, gastrointestinal and genitourinary female tracts, and oral cavity. They are asaccharolytic and their major energy sources are aminoacids and peptones. The species is usually isolated in polymicrobial cultures from abscesses, soft tissue infections, bone and joints. In the case herein presented, F. magna was recovered in pure culture from a nonpuerperal breast abscess, which adds to the two reported cases in related literature. Species identification was performed by special potency disks, standard bacteriological anaerobic tests, and production of saccharolytic and proteolytic enzymes. Antimicrobial susceptibility testing was performed by using the epsilometric test. The agents

  4. Esplenectomia subtotal por via laparoscópica em cães

    Directory of Open Access Journals (Sweden)

    Andy Petroianu

    Full Text Available OBJETIVO: O objetivo deste trabalho foi determinar a exeqüibilidade, reprodutibilidade e segurança da esplenectomia subtotal por via laparoscópica e suas repercussões morfológicas, hematológicas, imunitárias e de depuração sangüínea, comparando esses dados com os obtidos na esplenectomia laparotómica. MÉTODO: Este estudo experimental foi conduzido de acordo com os princípios éticos de pesquisa experimental, propostos pelo Comitê de Ética em Experimentação Animal da UFMG. Quatorze cães adultos mestiços de ambos os sexos foram distribuídos em dois grupos (n = 7: Grupo 1 - Esplenectomia subtotal laparoscópica, preservando o polo superior suprido exclusivamente pelos vasos esplenogástricos; a secção esplênica e hemostasia foram realizadas utilizando um grampeador linear cortante laparoscópico com carga de 45 mm de extensão. Grupo 2 - Esplenectomia total, realizada por meio de laparotomia mediana. Depois de três meses, foram analisadas as alterações nos exames hematológico, imunitário e cintilográfico em todos os animais. Secções dos remanescentes esplênicos, fígado e linfonodos foram avaliadas histologicamente. RESULTADOS: Todos os procedimentos transcorreram sem complicações, não havendo morte operatória e com perda sangüínea mínima. Todos os animais sobreviveram à operação durante os três meses de acompanhamento. Após esse período, houve redução da contagem de plaquetas (p < 0,05 no Grupo 1. O restante dos exames hematológicos permaneceu normal. Os remanescentes esplênicos apresentaram arquitetura semelhante ao baço normal. Não houve alterações histológicas nos linfonodos e fragmentos hepáticos. CONCLUSÕES: É possível e segura a realização da esplenectomia subtotal por via laparoscópica no cão.

  5. The self-normalized Donsker theorem revisited

    OpenAIRE

    Parczewski, Peter

    2016-01-01

    We extend the Poincar\\'{e}--Borel lemma to a weak approximation of a Brownian motion via simple functionals of uniform distributions on n-spheres in the Skorokhod space $D([0,1])$. This approach is used to simplify the proof of the self-normalized Donsker theorem in Cs\\"{o}rg\\H{o} et al. (2003). Some notes on spheres with respect to $\\ell_p$-norms are given.

  6. Proteoglycans in Leiomyoma and Normal Myometrium

    Science.gov (United States)

    Barker, Nichole M.; Carrino, David A.; Caplan, Arnold I.; Hurd, William W.; Liu, James H.; Tan, Huiqing; Mesiano, Sam

    2015-01-01

    Uterine leiomyoma are a common benign pelvic tumors composed of modified smooth muscle cells and a large amount of extracellular matrix (ECM). The proteoglycan composition of the leiomyoma ECM is thought to affect pathophysiology of the disease. To test this hypothesis, we examined the abundance (by immunoblotting) and expression (by quantitative real-time polymerase chain reaction) of the proteoglycans biglycan, decorin, and versican in leiomyoma and normal myometrium and determined whether expression is affected by steroid hormones and menstrual phase. Leiomyoma and normal myometrium were collected from women (n = 17) undergoing hysterectomy or myomectomy. In vitro studies were performed on immortalized leiomyoma (UtLM) and normal myometrial (hTERT-HM) cells with and without exposure to estradiol and progesterone. In leiomyoma tissue, abundance of decorin messenger RNA (mRNA) and protein were 2.6-fold and 1.4-fold lower, respectively, compared with normal myometrium. Abundance of versican mRNA was not different between matched samples, whereas versican protein was increased 1.8-fold in leiomyoma compared with myometrium. Decorin mRNA was 2.4-fold lower in secretory phase leiomyoma compared with proliferative phase tissue. In UtLM cells, progesterone decreased the abundance of decorin mRNA by 1.3-fold. Lower decorin expression in leiomyoma compared with myometrium may contribute to disease growth and progression. As decorin inhibits the activity of specific growth factors, its reduced level in the leiomyoma cell microenvironment may promote cell proliferation and ECM deposition. Our data suggest that decorin expression in leiomyoma is inhibited by progesterone, which may be a mechanism by which the ovarian steroids affect leiomyoma growth and disease progression. PMID:26423601

  7. Normal mode analysis for linear resistive magnetohydrodynamics

    International Nuclear Information System (INIS)

    Kerner, W.; Lerbinger, K.; Gruber, R.; Tsunematsu, T.

    1984-10-01

    The compressible, resistive MHD equations are linearized around an equilibrium with cylindrical symmetry and solved numerically as a complex eigenvalue problem. This normal mode code allows to solve for very small resistivity eta proportional 10 -10 . The scaling of growthrates and layer width agrees very well with analytical theory. Especially, both the influence of current and pressure on the instabilities is studied in detail; the effect of resistivity on the ideally unstable internal kink is analyzed. (orig.)

  8. On Normalized Compression Distance and Large Malware

    OpenAIRE

    Borbely, Rebecca Schuller

    2015-01-01

    Normalized Compression Distance (NCD) is a popular tool that uses compression algorithms to cluster and classify data in a wide range of applications. Existing discussions of NCD's theoretical merit rely on certain theoretical properties of compression algorithms. However, we demonstrate that many popular compression algorithms don't seem to satisfy these theoretical properties. We explore the relationship between some of these properties and file size, demonstrating that this theoretical pro...

  9. The J/$\\psi$ normal nuclear absorption

    CERN Document Server

    Alessandro, B; Arnaldi, R; Atayan, M; Beolè, S; Boldea, V; Bordalo, P; Borges, G; Castanier, C; Castor, J; Chaurand, B; Cheynis, B; Chiavassa, E; Cicalò, C; Comets, M P; Constantinescu, S; Cortese, P; De Falco, A; De Marco, N; Dellacasa, G; Devaux, A; Dita, S; Fargeix, J; Force, P; Gallio, M; Gerschel, C; Giubellino, P; Golubeva, M B; Grigorian, A A; Grigorian, S; Guber, F F; Guichard, A; kanyan, H; ldzik, M; Jouan, D; Karavicheva, T L; Kluberg, L; Kurepin, A B; Le Bornec, Y; Lourenço, C; Cormick, M M; Marzari-Chiesa, A; Masera, M; Masoni, A; Monteno, M; Musso, A; Petiau, P; Piccotti, A; Pizzi, J R; Prino, F; Puddu, G; Quintans, C; Ramello, L; Ramos, S; Riccati, L; Santos, H; Saturnini, P; Scomparin, E; Serci, S; Shahoyan, R; Sigaudo, M F; Sitta, M; Sonderegger, P; Tarrago, X; Topilskaya, N S; Usai, G L; Vercellin, E; Villatte, L; Willis, N; Wu T

    2005-01-01

    We present a new determination of the ratio of cross-sections (J/psi) /DY as expected for nucleus-nucleus reactions if J/psi would only be normally absorbed by nuclear matter. This anticipated behaviour is based on proton-nucleus data exclusively, and compared, as a function of centrality, with updated S-U results from experiment NA38 and with the most recent Pb-Pb results from experiment NA50.

  10. Research on Normal Human Plantar Pressure Test

    Directory of Open Access Journals (Sweden)

    Liu Xi Yang

    2016-01-01

    Full Text Available FSR400 pressure sensor, nRF905 wireless transceiver and MSP40 SCM are used to design the insole pressure collection system, LabVIEW is used to make HMI of data acquisition, collecting a certain amount of normal human foot pressure data, statistical analysis of pressure distribution relations about five stages of swing phase during walking, using the grid closeness degree to identify plantar pressure distribution pattern recognition, and the algorithm simulation, experimental results demonstrated this method feasible.

  11. The classification of normal screening mammograms

    Science.gov (United States)

    Ang, Zoey Z. Y.; Rawashdeh, Mohammad A.; Heard, Robert; Brennan, Patrick C.; Lee, Warwick; Lewis, Sarah J.

    2016-03-01

    Rationale and objectives: To understand how breast screen readers classify the difficulty of normal screening mammograms using common lexicon describing normal appearances. Cases were also assessed on their suitability for a single reader strategy. Materials and Methods: 15 breast readers were asked to interpret a test set of 29 normal screening mammogram cases and classify them by rating the difficulty of the case on a five-point Likert scale, identifying the salient features and assessing their suitability for single reading. Using the False Positive Fractions from a previous study, the 29 cases were classified into 10 "low", 10 "medium" and nine "high" difficulties. Data was analyzed with descriptive statistics. Spearman's correlation was used to test the strength of association between the difficulty of the cases and the readers' recommendation for single reading strategy. Results: The ratings from readers in this study corresponded to the known difficulty level of cases for the 'low' and 'high' difficulty cases. Uniform ductal pattern and density, symmetrical mammographic features and the absence of micro-calcifications were the main reasons associated with 'low' difficulty cases. The 'high' difficulty cases were described as having `dense breasts'. There was a statistically significant negative correlation between the difficulty of the cases and readers' recommendation for single reading (r = -0.475, P = 0.009). Conclusion: The findings demonstrated potential relationships between certain mammographic features and the difficulty for readers to classify mammograms as 'normal'. The standard Australian practice of double reading was deemed more suitable for most cases. There was an inverse moderate association between the difficulty of the cases and the recommendations for single reading.

  12. Geomagnetic reversal in brunhes normal polarity epoch.

    Science.gov (United States)

    Smith, J D; Foster, J H

    1969-02-07

    The magnetic stratigraphly of seven cores of deep-sea sediment established the existence of a short interval of reversed polarity in the upper part of the Brunches epoch of normal polarity. The reversed zone in the cores correlates well with paleontological boundaries and is named the Blake event. Its boundaries are estimated to be 108,000 and 114,000 years ago +/- 10 percent.

  13. Ureterocolonic anastomosis in clinically normal dogs

    International Nuclear Information System (INIS)

    Stone, E.A.; Walter, M.C.; Goldschmidt, M.H.; Biery, D.N.; Bovee, K.C.

    1988-01-01

    Ureterocolonic anastomosis was evaluated in 13 clinically normal dogs. Urinary continence was maintained after surgery, and the procedure was completed without technique errors in all but 2 dogs. Three dogs died within 5 weeks (2 of undetermined causes and 1 of aspiration pneumonia and neurologic disease), and 1 dog was euthanatized 4 months after surgery because of neurologic signs. Two healthy dogs were euthanatized 3 months after surgery for light microscopic evaluation of their kidneys. Five dogs were euthanatized 6 months after surgery for light microscopic evaluation of their kidneys. Gastrointestinal and neurologic disturbances developed in 4 dogs at various postoperative intervals. Plasma ammonia concentration measured in 2 dogs with neurologic signs was increased. Plasma ammonia concentration measured in 5 dogs without neurologic signs was within normal limits. All 5 dogs, in which metabolic acidosis was diagnosed, had high normal or above normal serum chloride concentration. Serum urea nitrogen values were increased after surgery because of colonic absorption of urea. Serum creatinine concentration was increased in 1 dog 6 months after surgery. Individual kidney glomerular filtration rate was reduced in 38% (3/8) of the kidneys from 4 other dogs at 6 months after surgery. Of 5 dogs euthanatized at 3 to 4 months after surgery, 4 had bilateral pyelitis, and 1 had unilateral pyelonephritis. Six months after surgery, pyelonephritis was diagnosed in 40% (4/10) of the kidneys from 5 dogs. The ureterocolonic anastomosis procedure is a salvage procedure that should allow complete cystectomy. However, variable degress of metabolic acidosis, hyperammonemia, and neurologic disease may result

  14. The thoracic paraspinal shadow: normal appearances.

    Science.gov (United States)

    Lien, H H; Kolbenstvedt, A

    1982-01-01

    The width of the right and left thoracic paraspinal shadows were measured at all levels in 200 presumably normal individuals. The paraspinal shadow could be identified in nearly all cases on the left side and in approximately one-third on the right. The range of variation was greater on the left side than one the right. The left paraspinal shadow was wider at the upper levels and in individuals above 40 years of age.

  15. Online Normalization Algorithm for Engine Turbofan Monitoring

    Science.gov (United States)

    2014-10-02

    Online Normalization Algorithm for Engine Turbofan Monitoring Jérôme Lacaille 1 , Anastasios Bellas 2 1 Snecma, 77550 Moissy-Cramayel, France...understand the behavior of a turbofan engine, one first needs to deal with the variety of data acquisition contexts. Each time a set of measurements is...it auto-adapts itself with piecewise linear models. 1. INTRODUCTION Turbofan engine abnormality diagnosis uses three steps: reduction of

  16. Comet Giacobini-Zinner - a normal comet?

    International Nuclear Information System (INIS)

    Cochran, A.L.; Barker, E.S.

    1987-01-01

    Observations of Comet Giacobini-Zinner were obtained during its 1985 apparition using an IDS spectrograph at McDonald Observatory. Column densities and production rates were computed. The production rates were compared to observations of other normal comets. Giacobini-Zinner is shown to be depleted in C2 and C3 relative to CN. These production rates are down by a factor of 5. 12 references

  17. Manual on environmental monitoring in normal operation

    International Nuclear Information System (INIS)

    1966-01-01

    Many establishments handling radioactive materials produce, and to some extent also discharge, radioactive waste as part of their normal operation. The radiation doses to which members of the public may be exposed during such operation must remain below the stipulated level. The purpose of this manual is to provide technical guidance for setting up programmes of routine environmental monitoring in the vicinity of nuclear establishment. The annex gives five examples of routine environmental monitoring programmes currently in use: these have been indexed separately.

  18. Normal Conducting RF Cavity for MICE

    International Nuclear Information System (INIS)

    Li, D.; DeMello, A.; Virostek, S.; Zisman, M.; Summers, D.

    2010-01-01

    Normal conducting RF cavities must be used for the cooling section of the international Muon Ionization Cooling Experiment (MICE), currently under construction at Rutherford Appleton Laboratory (RAL) in the UK. Eight 201-MHz cavities are needed for the MICE cooling section; fabrication of the first five cavities is complete. We report the cavity fabrication status including cavity design, fabrication techniques and preliminary low power RF measurements.

  19. Basic characterization of normal multifocal electroretinogram

    International Nuclear Information System (INIS)

    Fernandez Cherkasova, Lilia; Rojas Rondon, Irene; Castro Perez, Pedro Daniel; Lopez Felipe, Daniel; Santiesteban Freixas, Rosaralis; Mendoza Santiesteban, Carlos E

    2008-01-01

    A scientific literature review was made on the novel multifocal electroretinogram technique, the involved cell mechanisms and some of the factors modifying its results together with the form of presentation. The basic characteristics of this electrophysiological record obtained from several regions of the retina of normal subjects is important in order to create at a small scale a comparative database to evaluate pathological eye tracing. All this will greatly help in early less invasive electrodiagnosis of localized retinal lesions. (Author)

  20. Estimating the Heading Direction Using Normal Flow

    Science.gov (United States)

    1994-01-01

    understood (Faugeras and Maybank 1990), 3 Kinetic Stabilization under the assumption that optic flow or correspon- dence is known with some uncertainty...accelerometers can achieve very It can easily be shown (Koenderink and van Doom high accuracy, the same is not true for inexpensive 1975; Maybank 1985... Maybank . ’Motion from point matches: Multi- just don’t compute normal flow there (see Section 6). plicity of solutions". Int’l J. Computer Vision 4

  1. Normalization of oxygen and hydrogen isotope data

    Science.gov (United States)

    Coplen, T.B.

    1988-01-01

    To resolve confusion due to expression of isotopic data from different laboratories on non-corresponding scales, oxygen isotope analyses of all substances can be expressed relative to VSMOW or VPDB (Vienna Peedee belemnite) on scales normalized such that the ??18O of SLAP is -55.5% relative to VSMOW. H3+ contribution in hydrogen isotope ratio analysis can be easily determined using two gaseous reference samples that differ greatly in deuterium content. ?? 1988.

  2. Parietal podocytes in normal human glomeruli.

    Science.gov (United States)

    Bariety, Jean; Mandet, Chantal; Hill, Gary S; Bruneval, Patrick

    2006-10-01

    Although parietal podocytes along the Bowman's capsule have been described by electron microscopy in the normal human kidney, their molecular composition remains unknown. Ten human normal kidneys that were removed for cancer were assessed for the presence and the extent of parietal podocytes along the Bowman's capsule. The expression of podocyte-specific proteins (podocalyxin, glomerular epithelial protein-1, podocin, nephrin, synaptopodin, and alpha-actinin-4), podocyte synthesized proteins (vascular endothelial growth factor and novH), transcription factors (WT1 and PAX2), cyclin-dependent kinase inhibitor p57, and intermediate filaments (cytokeratins and vimentin) was tested. In addition, six normal fetal kidneys were studied to track the ontogeny of parietal podocytes. The podocyte protein labeling detected parietal podocytes in all of the kidneys, was found in 76.6% on average of Bowman's capsule sections, and was prominent at the vascular pole. WT1 and p57 were expressed in some parietal cells, whereas PAX2 was present in all or most of them, so some parietal cells coexpressed WT1 and PAX2. Furthermore, parietal podocytes coexpressed WT1 and podocyte proteins. Cytokeratin-positive cells covered a variable part of the capsule and did not express podocyte proteins. Tuft-capsular podocyte bridges were present in 15.5 +/- 3.7% of the glomerular sections. Parietal podocytes often covered the juxtaglomerular arterioles and were present within the extraglomerular mesangium. Parietal podocytes were present in fetal kidneys. Parietal podocytes that express the same epitopes as visceral podocytes do exist along Bowman's capsule in the normal adult kidney. They are a constitutive cell type of the Bowman's capsule. Therefore, their role in physiology and pathology should be investigated.

  3. Crate counter for normal operating loss

    International Nuclear Information System (INIS)

    Harlan, R.A.

    A lithium-loaded zinc sulfide scintillation counter to closely assay plutonium in waste packaged in 1.3 by 1.3 by 2.13m crates was built. In addition to assays for normal operating loss accounting, the counter will allow safeguards verification immediately before shipment of the crates for burial. The counter should detect approximately 10 g of plutonium in 1000 kg of waste

  4. ''Identical'' bands in normally-deformed nuclei

    International Nuclear Information System (INIS)

    Garrett, J.D.; Baktash, C.; Yu, C.H.

    1990-01-01

    Gamma-ray transitions energies in neighboring odd- and even-mass nuclei for normally-deformed nuclear configurations are analyzed in a manner similar to recent analyses for superdeformed states. The moment of inertia is shown to depend on pair correlations and the aligned angular momentum of the odd nucleon. The implications of this analysis for ''identical'' super-deformed bands are discussed. 26 refs., 9 figs

  5. Deconstructing Interocular Suppression: Attention and Divisive Normalization.

    Directory of Open Access Journals (Sweden)

    Hsin-Hung Li

    2015-10-01

    Full Text Available In interocular suppression, a suprathreshold monocular target can be rendered invisible by a salient competitor stimulus presented in the other eye. Despite decades of research on interocular suppression and related phenomena (e.g., binocular rivalry, flash suppression, continuous flash suppression, the neural processing underlying interocular suppression is still unknown. We developed and tested a computational model of interocular suppression. The model included two processes that contributed to the strength of interocular suppression: divisive normalization and attentional modulation. According to the model, the salient competitor induced a stimulus-driven attentional modulation selective for the location and orientation of the competitor, thereby increasing the gain of neural responses to the competitor and reducing the gain of neural responses to the target. Additional suppression was induced by divisive normalization in the model, similar to other forms of visual masking. To test the model, we conducted psychophysics experiments in which both the size and the eye-of-origin of the competitor were manipulated. For small and medium competitors, behavioral performance was consonant with a change in the response gain of neurons that responded to the target. But large competitors induced a contrast-gain change, even when the competitor was split between the two eyes. The model correctly predicted these results and outperformed an alternative model in which the attentional modulation was eye specific. We conclude that both stimulus-driven attention (selective for location and feature and divisive normalization contribute to interocular suppression.

  6. Deconstructing Interocular Suppression: Attention and Divisive Normalization.

    Science.gov (United States)

    Li, Hsin-Hung; Carrasco, Marisa; Heeger, David J

    2015-10-01

    In interocular suppression, a suprathreshold monocular target can be rendered invisible by a salient competitor stimulus presented in the other eye. Despite decades of research on interocular suppression and related phenomena (e.g., binocular rivalry, flash suppression, continuous flash suppression), the neural processing underlying interocular suppression is still unknown. We developed and tested a computational model of interocular suppression. The model included two processes that contributed to the strength of interocular suppression: divisive normalization and attentional modulation. According to the model, the salient competitor induced a stimulus-driven attentional modulation selective for the location and orientation of the competitor, thereby increasing the gain of neural responses to the competitor and reducing the gain of neural responses to the target. Additional suppression was induced by divisive normalization in the model, similar to other forms of visual masking. To test the model, we conducted psychophysics experiments in which both the size and the eye-of-origin of the competitor were manipulated. For small and medium competitors, behavioral performance was consonant with a change in the response gain of neurons that responded to the target. But large competitors induced a contrast-gain change, even when the competitor was split between the two eyes. The model correctly predicted these results and outperformed an alternative model in which the attentional modulation was eye specific. We conclude that both stimulus-driven attention (selective for location and feature) and divisive normalization contribute to interocular suppression.

  7. Hilar height ratio in normal Korea

    International Nuclear Information System (INIS)

    Yoo, Kyung Ho; Lee, Nam Joon; Seol, Hae Young; Chung, Kyoo Byung

    1979-01-01

    Hilar displacement is one of the significant sign of pulmonary volume change. The hilar height ratio (HHR) is a value that express the normal position of hilum in its hemithorax, and it is calculated by dividing the distance from the hilum to the lung apex by the distance from the hilum to the diaphragm. Displacement of one hilum is usually easy to detect but both are displaced in the same direction especially, recognition is more difficult. Knowledge of normal HHR allows evaluation of hilar positional change even when the relative hilar position are not altered. Normal chest PA views of 275 cases taken at Korea University Hospital during the period of April 1978 to Jun 1979 were analyzed. The right hilum is positioned in lower half of the right hemithorax, while the left hilum is situated in the upper half of left hemithorax. The difference of hilar ratio according to age group is slight, but there is significant difference between right-HHR and left-HHR. The value of right-HHR is 1.28 ± 0.14, the value of left-HHR is 0.88 ± 0.09.

  8. Normal CT anatomy of the spine

    International Nuclear Information System (INIS)

    Quiroga, O.; Matozzi, F.; Beranger, M.; Nazarian, S.; Salamon, G.; Gambarelli, J.

    1982-01-01

    To analyse the anatomo-radiological correlation of the spine and spinal cord, 22 formalized, frozen anatomical specimens corresponding to different regions of the spinal column (8 cervical, 5 dorsal, and 9 lumbar) were studied by CT scans on axial, sagittal and coronal planes and by contact radiography after they were cut into anatomical slices in order to clarify the normal CT anatomy of the spinal column. The results obtained from CT patient scans, performed exclusively on the axial plane, were compared with those obtained from the anatomical specimens (both CT and contrast radiography). High resolution CT programs were used, enabling us to obtain better individualization of the normal structures contained in the spinal column. Direct sagittal and coronal sections were performed on the specimens in order to get further anatomo-radiological information. Enhanced CT studies of the specimens were also available because of the air already present in the subarachnoid spaces. Excellent visualization was obtained of bone structures, soft tissue and the spinal cord. High CT resolution of the spine appeares to be an excellent neuroradiological procedure to study the spine and spinal cord. A metrizamide CT scan is, however, necessary when a normal unenhanced CT scan is insufficient for diagnosis and when the spinal cord is not clearly visible, as often happens at the cervical level. Clinical findings are certainly very useful to ascertain the exact CT level and to limit the radiation exposure. (orig.)

  9. Aerosol lung inhalation scintigraphy in normal subjects

    Energy Technology Data Exchange (ETDEWEB)

    Sui, Osamu; Shimazu, Hideki

    1985-03-01

    We previously reported basic and clinical evaluation of aerosol lung inhalation scintigraphy with /sup 99m/Tc-millimicrosphere albumin (milli MISA) and concluded aerosol inhalation scintigraphy with /sup 99m/Tc-milli MISA was useful for routine examination. But central airway deposit of aerosol particles was found in not only the patients with chronic obstructive pulmonary disease (COPD) but also normal subjects. So we performed aerosol inhalation scintigraphy in normal subjects and evaluated their scintigrams. The subjects had normal values of FEVsub(1.0)% (more than 70%) in lung function tests, no abnormal findings in chest X-ray films and no symptoms and signs. The findings of aerosol inhalation scintigrams in them were classified into 3 patterns; type I: homogeneous distribution without central airway deposit, type II: homogeneous distribution with central airway deposit, type III: inhomogeneous distribution. These patterns were compared with lung function tests. There was no significant correlation between type I and type II in lung function tests. Type III was different from type I and type II in inhomogeneous distribution. This finding showed no correlation with %VC, FEVsub(1.0)%, MMF, V radical50 and V radical50/V radical25, but good correlation with V radical25 in a maximum forced expiratory flow-volume curve. Flow-volume curve is one of the sensitive methods in early detection of COPD, so inhomogeneous distribution of type III is considered to be due to small airway dysfunction.

  10. Mast cell distribution in normal adult skin.

    Science.gov (United States)

    Janssens, A S; Heide, R; den Hollander, J C; Mulder, P G M; Tank, B; Oranje, A P

    2005-03-01

    To investigate mast cell distribution in normal adult skin to provide a reference range for comparison with mastocytosis. Mast cells (MCs) were counted in uninvolved skin adjacent to basal cell carcinomas and other dermatological disorders in adults. There was an uneven distribution of MCs in different body sites using the anti-tryptase monoclonal antibody technique. Numbers of MCs on the trunk, upper arm, and upper leg were similar, but were significantly different from those found on the lower leg and forearm. Two distinct groups were formed--proximal and distal. There were 77.0 MCs/mm2 at proximal body sites and 108.2 MCs/mm2 at distal sites. Adjusted for the adjacent diagnosis and age, this difference was consistent. The numbers of MCs in uninvolved skin adjacent to basal cell carcinomas and other dermatological disorders were not different from those in the control group. Differences in the numbers of MCs between the distal and the proximal body sites must be considered when MCs are counted for a reliable diagnosis of mastocytosis. A pilot study in patients with mastocytosis underlined the variation in the numbers of MCs in mastocytosis and normal skin, but showed a considerable overlap. The observed numbers of MCs in adults cannot be extrapolated to children. MC numbers varied significantly between proximal and distal body sites and these differences must be considered when MCs are counted for a reliable diagnosis of mastocytosis. There was a considerable overlap between the numbers of MCs in mastocytosis and normal skin.

  11. Normal form for mirror machine Hamiltonians

    International Nuclear Information System (INIS)

    Dragt, A.J.; Finn, J.M.

    1979-01-01

    A systematic algorithm is developed for performing canonical transformations on Hamiltonians which govern particle motion in magnetic mirror machines. These transformations are performed in such a way that the new Hamiltonian has a particularly simple normal form. From this form it is possible to compute analytic expressions for gyro and bounce frequencies. In addition, it is possible to obtain arbitrarily high order terms in the adiabatic magnetic moment expansion. The algorithm makes use of Lie series, is an extension of Birkhoff's normal form method, and has been explicitly implemented by a digital computer programmed to perform the required algebraic manipulations. Application is made to particle motion in a magnetic dipole field and to a simple mirror system. Bounce frequencies and locations of periodic orbits are obtained and compared with numerical computations. Both mirror systems are shown to be insoluble, i.e., trajectories are not confined to analytic hypersurfaces, there is no analytic third integral of motion, and the adiabatic magnetic moment expansion is divergent. It is expected also that the normal form procedure will prove useful in the study of island structure and separatrices associated with periodic orbits, and should facilitate studies of breakdown of adiabaticity and the onset of ''stochastic'' behavior

  12. [Quantification of acetabular coverage in normal adult].

    Science.gov (United States)

    Lin, R M; Yang, C Y; Yu, C Y; Yang, C R; Chang, G L; Chou, Y L

    1991-03-01

    Quantification of acetabular coverage is important and can be expressed by superimposition of cartilage tracings on the maximum cross-sectional area of the femoral head. A practical Autolisp program on PC AutoCAD has been developed by us to quantify the acetabular coverage through numerical expression of the images of computed tomography. Thirty adults (60 hips) with normal center-edge angle and acetabular index in plain X ray were randomly selected for serial drops. These slices were prepared with a fixed coordination and in continuous sections of 5 mm in thickness. The contours of the cartilage of each section were digitized into a PC computer and processed by AutoCAD programs to quantify and characterize the acetabular coverage of normal and dysplastic adult hips. We found that a total coverage ratio of greater than 80%, an anterior coverage ratio of greater than 75% and a posterior coverage ratio of greater than 80% can be categorized in a normal group. Polar edge distance is a good indicator for the evaluation of preoperative and postoperative coverage conditions. For standardization and evaluation of acetabular coverage, the most suitable parameters are the total coverage ratio, anterior coverage ratio, posterior coverage ratio and polar edge distance. However, medial coverage and lateral coverage ratios are indispensable in cases of dysplastic hip because variations between them are so great that acetabuloplasty may be impossible. This program can also be used to classify precisely the type of dysplastic hip.

  13. Normal and abnormal aging in bilinguals

    Directory of Open Access Journals (Sweden)

    Alfredo Ardila

    Full Text Available Abstract Bilinguals use two different language systems to mediate not only social communication, but also cognitive processes. Potential differences between bilinguals and monolinguals in task-solving strategies and patterns of cognitive decline during normal and abnormal aging have been suggested. Main contribution: A research review of the area suggests that normal aging is associated with increased interference between the two languages and tendency to retreat to a single language. General cognitive functioning has been found to be higher in demented bilingual patients if communication is carried out in L1 rather than in L2. Recent research has reported that bilingualism can have a protective effect during aging, attenuating the normal cognitive decline associated with aging, and delaying the onset of dementia. Conclusions: Regardless of the significant heterogeneity of bilingualism and the diversity of patterns in language use during life-span, current research suggests that bilingualism is associated with preserved cognitive test performance during aging, and potentially can have some protective effect in dementia.

  14. Cerebral perfusion in homogeneity in normal volunteers

    International Nuclear Information System (INIS)

    Gruenwald, S.M.; Larcos, G.

    1998-01-01

    Full text: In the interpretation of cerebral perfusion scans, it is important to know the normal variation in perfusion which may occur between the cerebral hemispheres. For this reason 24 normal volunteers with no neurological or psychiatric history, and who were on no medications, had 99m Tc-HMPAO brain SPECT studies using a single headed gamma camera computer system. Oblique, coronal and sagittal images were reviewed separately by two experienced observers and any differences were resolved by consensus. Semi-quantitation was performed by summing two adjacent oblique slices and drawing right and left mirror image ROIs corresponding to the mid section level of anterior and posterior frontal lobes, anterior and posterior parietal lobes, temporal lobes and cerebellum. From the mean counts per pixel, right: left ROI ratios and ROI: cerebellar ratios were calculated. On qualitative review 6/24 subjects had mild asymmetry in tracer distribution between right and left cerebral lobes. Semi-quantitation revealed a 5-10% difference in counts between right and left ROIs in 12/24 subjects and an additional three subjects had 10-20% difference in counts between right and left temporal lobes. This study demonstrates the presence of mild asymmetry of cerebral perfusion in a significant minority of normal subjects

  15. Morbilidad oculta por parasitismo intestinal en Lagunita, municipio Girardot, Venezuela

    Directory of Open Access Journals (Sweden)

    Yanelis Núñez Gómez

    2014-08-01

    Full Text Available Se realizó un estudio epidemiológico descriptivo de corte transversal, con el objetivo de determinar la morbilidad oculta por parasitismo intestinal en Lagunita, municipio Girardot, Venezuela; en el período de enero a octubre de 2009. El universo fue de 286 niños, lo que se corresponde con la población total del grupo de edad de menores de 15 años. De estos se seleccionaron por muestreo aleatorio simple 43 pacientes, a los que se les aplicó un cuestionario y se confeccionó una guía de observación, para describir los factores epidemiológicos que influyen en la infestación por parasitismo intestinal. Además, se les realizaron análisis de las heces fecales seriadas para el diagnóstico del parasitismo. El método estadístico fue el cálculo de las frecuencias absolutas y relativas. A través del estudio de las heces fecales seriadas se obtuvo que 27 pacientes tenían parasitosis intestinal, para una morbilidad de 62,79%, con una mayor incidencia en los niños de cinco a nueve años de edad. El sexo femenino fue el más afectado. Los factores epidemiológicos que más influyeron fueron: los malos hábitos higiénicos personales, el entorno desfavorable y el consumo de agua no potable; existió relación entre el nivel socioeconómico, los factores epidemiológicos y la morbilidad por parasitismo intestinal. Predominó la parasitosis por Entamoeba Histolytica, con 11 casos, para un 40,74%. La diarrea, las molestias abdominales y la pérdida de apetito constituyeron los principales síntomas

  16. LUCHA POR LA TIERRA EN EL NORTE DE URUGUAY

    Directory of Open Access Journals (Sweden)

    Gabriel Oyhantçabal Benelli

    2011-12-01

    Full Text Available Este artículo analiza la trayectoria de la lucha por la tierra en Bella Unión, una región característica en Uruguay por la producción de caña de azúcar, a través de los movimientos de clase de sus principales protagonistas: los cortadores de caña sindicalizados en la Unión de Trabajadores Azucareros de Artigas (UTAA. El recorrido histórico hace énfasis en dos períodos históricos diferentes: 1961-1973 y 2005-presente. El primero va desde la fundación del sindicato hasta el golpe militar. Se da en un contexto de auge de la lucha de masas en Uruguay en el cual los trabajadores rurales se organizan en la UTAA levantando, entre otras, la bandera de la Reforma Agraria. El segundo período está marcado por la llegada al gobierno nacional del Frente Amplio, una coalición social-demócrata que reactiva la producción de caña de azúcar en Bella Unión. Este cambio supone una oportunidad para las luchas sociales que la UTAA aprovecha con ocupaciones de tierra favoreciendo un proceso de colonización para los trabajadores rurales. Sin embargo el acceso a la tierra genera nuevas contradicciones, y por tanto nuevos desafíos, por los cambios en la forma de subsunción del trabajo al capital.

  17. Infección por virus papiloma humano en pacientes con citología de cuello uterino negativa

    OpenAIRE

    Toro de Méndez, Morelva; López de Sánchez, Mercedes

    2017-01-01

    Objetivo: Examinar la prevalencia de la infección por virus papiloma humano en pacientes con citologías de cuello uterino negativas, en un programa de pesquisa de cáncer de cuello de la Misión Barrio Adentro. Métodos: Se analizaron 3883 muestras citológicas convencionales de cuello uterino según el sistema Bethesda 2001, de las cuales 3651 (94,0 %) eran citologías normales. Se usó PCR/RFLP para la detección y tipificación de virus de papiloma humano. Resultados: La edad promedio de las pacien...

  18. Deformation around basin scale normal faults

    International Nuclear Information System (INIS)

    Spahic, D.

    2010-01-01

    Faults in the earth crust occur within large range of scales from microscale over mesoscopic to large basin scale faults. Frequently deformation associated with faulting is not only limited to the fault plane alone, but rather forms a combination with continuous near field deformation in the wall rock, a phenomenon that is generally called fault drag. The correct interpretation and recognition of fault drag is fundamental for the reconstruction of the fault history and determination of fault kinematics, as well as prediction in areas of limited exposure or beyond comprehensive seismic resolution. Based on fault analyses derived from 3D visualization of natural examples of fault drag, the importance of fault geometry for the deformation of marker horizons around faults is investigated. The complex 3D structural models presented here are based on a combination of geophysical datasets and geological fieldwork. On an outcrop scale example of fault drag in the hanging wall of a normal fault, located at St. Margarethen, Burgenland, Austria, data from Ground Penetrating Radar (GPR) measurements, detailed mapping and terrestrial laser scanning were used to construct a high-resolution structural model of the fault plane, the deformed marker horizons and associated secondary faults. In order to obtain geometrical information about the largely unexposed master fault surface, a standard listric balancing dip domain technique was employed. The results indicate that for this normal fault a listric shape can be excluded, as the constructed fault has a geologically meaningless shape cutting upsection into the sedimentary strata. This kinematic modeling result is additionally supported by the observation of deformed horizons in the footwall of the structure. Alternatively, a planar fault model with reverse drag of markers in the hanging wall and footwall is proposed. Deformation around basin scale normal faults. A second part of this thesis investigates a large scale normal fault

  19. Magnetic resonance imaging of normal pituitary gland

    International Nuclear Information System (INIS)

    Yamanaka, Masami; Uozumi, Tohru; Sakoda, Katsuaki; Ohta, Masahiro; Kagawa, Yoshihiro; Kajima, Toshio.

    1986-01-01

    Magnetic resonance imaging (MRI) is a suitable procedure for diagnosing such midline-positioned lesions as pituitary adenomas. To differentiate them from microadenomas fifty-seven cases (9 - 74 years old, 29 men and 28 women), including 50 patients without any sellar or parasellar diseases and seven normal volunteers, were studied in order to clarify the MR findings of the shape, height, and signal intensity of the normal pituitary gland, especially at the median sagittal section. The height of a normal pituitary gland varied from 2 to 9 mm (mean: 5.7 mm); the upper surface of the gland was convex in 19.3 %, flat in 49.1 %, and concave in 31.6 %. The mean height of the gland in women in their twenties was 7.5 mm, and the upper convex shape appeared exclusively in women of the second to fourth decades. Nine intrasellar pituitary adenomas (PRL-secreting: 4, GH-secreting: 4, ACTH-secreting: 1), all verified by surgery, were diagnosed using a resistive MR system. The heights of the gland in these cases were from 7 to 15 mm (mean: 11.3 mm); the upper surface was convex in 7 cases. A localized bulging of the upper surface of the gland and a localized depression of the sellar floor were depicted on the coronal and sagittal sections in most cases. Although the GH- and ACTH-secreting adenoma cases showed homogeneous intrasellar contents, in all the PRL-secreting adenoma cases a low-signal-intensity area was detected in the IR images. The mean T1 values of the intrasellar content of the normal volunteers, the PRL-, GH-, and ACTH-secreting adenoma cases, were 367, 416, 355, and 411 ms respectively. However, in the PRL-secreting adenoma cases, the mean T1 value of the areas showing a low signal intensity on IR images was 455 ms; this was a significant prolongation in comparison with that of a normal pituitary gland. (J.P.N.)

  20. Data-driven intensity normalization of PET group comparison studies is superior to global mean normalization

    DEFF Research Database (Denmark)

    Borghammer, Per; Aanerud, Joel; Gjedde, Albert

    2009-01-01

    BACKGROUND: Global mean (GM) normalization is one of the most commonly used methods of normalization in PET and SPECT group comparison studies of neurodegenerative disorders. It requires that no between-group GM difference is present, which may be strongly violated in neurodegenerative disorders....... Importantly, such GM differences often elude detection due to the large intrinsic variance in absolute values of cerebral blood flow or glucose consumption. Alternative methods of normalization are needed for this type of data. MATERIALS AND METHODS: Two types of simulation were performed using CBF images...