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Sample records for intervalo puerta-droga factor

  1. FACTORES QUE AFECTAN EL INTERVALO PARTO PRIMER SERVICIO EN VACAS LECHERAS DE CRIANZA INTENSIVA

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    Evaristo R., Roberto; Práctica privada; Echevarría C., Luisa; Laboratorio de Reproducción, Facultad de Medicina Veterinaria, Universidad Nacional Mayor de San Marcos, Lima.

    2014-01-01

    Se estudiaron 128 vacas lecheras pertenecientes a 5 establos de Lima con un sistema de manejo intensivo. Se determinó los siguientes parámetros reproductivos: Intervalo Parto Primer Servicio (IPPS) e Intervalo Parto Primera Ovulación (IPPO). El IPPO fue obtenido por niveles de progesterona de leche descremada mediante la técnica del Radio Inmuno Análisis (RIA). La frecuencia del muestreo se hizo dos veces por semana desde el quinceavo día postparto hasta la primera inseminación Artificial (IA...

  2. FACTORES AMBIENTALES QUE AFECTAN LA EDAD AL PRIMER PARTO Y PRIMER INTERVALO DE PARTOS EN VACAS DEL SISTEMA DOBLE PROPOSITO

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    Caty Martínez B

    2009-04-01

    Full Text Available Objetivo. Determinar los factores que influyen en la edad al primer parto (AFC y primer intervalo de parto (PIDP en hembras bovinas bajo el sistema de doble propósito, en la finca “El Rodeo”, municipio de Magangué, Bolívar - Colombia. Materiales y métodos. Se analizaron 379 datos provenientes de los registros productivos entre los años 1993 hasta 2002, usando el programa estadístico GLM del Statistical Analysis System, donde se obtuvieron la media y el error estándar de cada fuente de variación. En el análisis se consideraron los efectos de año de parto, época de parto, edad al primer parto (no se consideró para EPP, sexo de la cría, grupo racial y peso a los 24 meses. Resultados. La media para la EPP y PIDP fue de 38.9 ± 3.9 meses y 469.2 ± 9 días, respectivamente, donde el efecto época de parto, fue significativo para la duración del PIDP. Los efectos sexo de la cría, peso a los 24 meses y época, no fueron significativos sobre la EPP. Los efectos año de parto, edad al primer parto, sexo de la cría, peso a los 24 meses no fueron significativos sobre el PIDP. Conclusiones. La EPP y PIDP fueron afectados por el año y la época de parto, respectivamente.

  3. FACTORES QUE AFECTAN EL INTERVALO PARTO-PRIMER SERVICIO Y PRIMER SERVICIO-CONCEPCIÓN EN VACAS LECHERAS DEL VALLE DEL MANTARO DURANTE LA ÉPOCA LLUVIOSA.

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    Arana D., Carlos; Estación Experimental IVITA-El Mantaro, Facultad de Medicina Veterinaria, Universidad Nacional Mayor de San Marcos, Lima Perú.; Echevarría C., Luisa; Laboratorio de Reproducción Animal, Facultad de Medicina Veterinaria, Universidad Nacional Mayor de San Marcos, Lima Perú.; Segura C., Julia; Facultad de Veterinaria y Zootecnia, Universidad Peruana Cayetano Heredia

    2012-01-01

    Se realizó un seguimiento reproductivo en 40 vacas lecheras del valle delMantaro (Junín, Perú), pertenecientes a 6 establos, durante la época lluviosa. Se determinó el intervalo parto-primera ovulación (IPPO), el intervalo parto-primer servicio (IPPS), y el intervalo parto-concepción (IPC), midiendo el efecto de raza, número de parto, producción de leche, establo y nivel tecnológico. El IPPO se determinó a través de niveles de progesterona mediante radioinmunoensayo en muestras de leche descr...

  4. Fatores genéticos e de ambiente sobre o intervalo de partos de cabras leiteiras no semi-árido nordestino Genetic and environmental factors affecting the kidding interval of dairy goats in the semi-arid Northeastern

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    José Lindenberg Rocha Sarmento

    2003-08-01

    Full Text Available Objetivou-se estudar a influência de efeitos genéticos e ambientais sobre o intervalo de partos, utilizando-se 486 registros de parição de cabras leiteiras mestiças criadas entre 1988 e 1996, no Estado da Paraíba. Os efeitos ambientais foram analisados pelo procedimento GLM do SAS por meio de um modelo que incluiu os efeitos fixos de grupo contemporâneo e tipo de parto, as covariáveis idade da cabra ao parto e duração da lactação e os efeitos aleatórios de bode e cabra dentro de bode e erro. O programa MTDFREML foi usado para estimar os parâmetros genéticos sob modelo animal, que incluía os mesmos efeitos fixos e covariáveis do modelo anterior. Como aleatórios foram considerados os efeitos genético aditivo, permanente de meio e erro. O intervalo de parto médio obtido foi 275,55 ± 60,96 dias. Os efeitos de grupo contemporâneo e duração da lactação influenciaram o intervalo de partos. As estimativas de herdabilidade e repetibilidade foram de baixa magnitude, 0,09 e 0,09, respectivamente, indicando que reduções mais rápidas nessa característica seriam obtidas por meio de melhorias no manejo.The aims of this study were evaluate influence of the environmental and genetic effects on the kidding interval, using 486 records of kidding crossbred dairy goats obtained from 1988 to 1996 in Paraiba State. The environmental effects were analyzed by means of the procedure GLM of the SAS with a model that included as fixed factors the contemporary group and kidding type, and covariates age of goat at kidding and lactation length. Buck, goat inside of the buck and error were included as random effects. MTDFREML program was used in the analysis with an animal model containing the contemporary group and kidding type, the linear and quadratic effects of age of kidding and lactation length as fixed effects. Animal and permanent environmental and error were included as random effects. The least-square means of kidding interval was 275

  5. Intervalos entre tratamentos inseticidas Interval between insecticide treatments

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    Luiz O. T. Mendes

    1959-01-01

    Full Text Available Admitindo que as populações de insetos crescem segundo a lei logística, o autor, partindo de uma equação que a descreve, apresenta uma fórmula que permite estabelecer o intervalo de tempo que deve decorrer entre os tratamentos inseticidas, para que a infestação por uma praga não exceda um limite pré-estabelecido. O valor de t (intervalo, expresso em número de gerações do inseto depende do potencial biótico da espécie, da eficiência do inseticida e do nível de infestação que se estabelecer como máximo permissível. Os resultados teóricos são discutidos e mostram a possibilidade de sua comprovação por meio de populações de insetos mantidas em laboratório, como fase preliminar à sua aplicação no campo.Based on the assumption that the growth of insect populations follows the logistic law, the author developed an equation for the determination of the time interval between insecticide treatments: t= {lpg [100-Po (1-E / (1 - E (100 -Po]} / log p where t = time interval between treatments expressed in number of generations of the species; Po = maximum percentage of infestation, that must not be surpassed (from 0,00 to 100,00; E = efficiency of the insecticide (from 0,00 to 1,00; p = reproduction potential of the species. The theoretical results are discussed.

  6. Medicamentos que podem induzir prolongamento do intervalo QT utilizados por idosos em domicílio

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    Josiane Macêdo Martins

    2015-10-01

    Full Text Available O intervalo QT (iQT, parâmetro eletrocardiográfico, é um biomarcador não invasivo da repolarização ventricular. O aumento do iQT é uma alteração que pode ser de considerável importância clínica, pois predispõe a torsade de pointes e morte cardíaca súbita. O objetivo do presente trabalho é identificar os medicamentos utilizados em domicílio por idosos, que podem induzir o prolongamento do iQT. Trata-se de um estudo quantitativo descritivo exploratório e retrospectivo, realizado em um hospital público de ensino. Foram incluídos 190 idosos com informação sobre uso domiciliar de medicamentos registrada em prontuário. A mediana da idade foi de 69,5 anos, sendo 99 (52,1% mulheres. O número de medicamentos utilizados por paciente em domicílio apresentou mediana de 4,0. Foram identificados 159 fármacos, sendo que 23 (14,5% apresentavam capacidade de induzir prolongamento do iQT. Entre os idosos, 39 (20,5% usavam estes fármacos, sendo os mais prevalentes a amiodarona, amitriptilina, nortriptilina, citalopram e fluoxetina. A hipertensão arterial foi o fator de risco mais frequente dentre aqueles que predispõem a prolongamento do iQT. As utilizações de medicamentos que induzem prolongamento do iQT e a presença de fatores de risco predisponentes mostram que os idosos estão expostos ao risco de desenvolvimento de torsade de pointes. A identificação dos fármacos que induzem prolongamento do iQT, das interações medicamentosas e das condições clínicas que predispõem a esse prolongamento são importantes para garantia da segurança da farmacoterapia de idosos e para evitar eventos adversos graves.Palavras-chave: Prolongamento do intervalo QT. Medicamentos. Idosos. Torsades de pointes. ABSTRACT The QT interval (QTi, an electrocardiographic parameter, is a noninvasive biomarker of ventricular repolarization. Increased QTi is a change that may have clinical importance because predisposes to torsade de pointes and sudden

  7. COMPARACION DE 13 INTERVALOS DE CONFIANZA PARA LOS PARAMETROS DE LA DISTRIBUCION MULTINOMIAL

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    Difariney González-Gómez

    2015-07-01

    Full Text Available La distribución multinomial es fundamental para la descripción de fenómenos en los que pueden ocurrir k > 2 eventos excluyentes, cada uno con probabilidad π = (π1, π2, . . . , πk. Algunos ejemplos de esta distribución incluyen la calidad de un producto o encuestas de selección múltiple. Un problema de gran interés en inferencia estadística es la construcción de intervalos de confianza los parámetros para π. En este trabajo se comparan, a través de un estudio de simulación, 13 metodologías para la construcción de intervalos de confianza para dicha distribución. Utilizando como criterios de comparación el nivel de confianza nominal, la longitud del intervalo y una combinación de estos, se encuentra que los intervalos de confianza basados en el Teorema del Límite Central no presentan el mejor desempeño. Finalmente se recomiendan los métodos basados en la distribución F (Leemis, 1996, seguido del método de verosimilitud relativa (Kalbfleish, 1985 y Quesenberry & Hurst (1964.

  8. Intervalo de partos em rebanho Nelore na Amazônia Oriental

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    Cavalcante Francisco Aloísio

    2000-01-01

    Full Text Available O estudo foi conduzido para avaliar intervalo de partos (IDP na raça Nelore, utilizando 578 dados de intervalo de partos de animais criados em regime de pasto, no período de 1988 a 1996. Para as análises estatísticas dos dados, foi usado o Programa SAS (Statistical Analysis System. Foram incluídos no modelo o efeito aleatório do pai da vaca, os efeitos fixos de grupo genético da cria anterior, de ano do parto anterior e do mês do parto anterior e as interações entre grupo genético anterior e mês do parto anterior, grupo genético anterior e ano do parto anterior, além da idade da vaca ao parto como covariável. O IDP foi influenciado pelo pai da vaca e pelo ano do parto anterior. A média estimada por quadrado mínimo e seu respectivo erro-padrão (EP e coeficiente de variação (CV foram 431,83 ± 142,76 dias e 33,06%, respectivamente. O intervalo de partos, além do efeito de pai, sofreu influência de ambiente. O desempenho reprodutivo do rebanho estudado, para as condições de clima tropical, pode ser considerado como satisfatório, estando de acordo com os parâmetros obtidos por outros autores em diferentes regiões.

  9. Inclusión del Intervalo Interestral (IIE) como elemento diagnóstico de la fertilidad del rebaño bovino

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    M.Sc José A Betancourt Betancourt.

    2005-01-01

    ResumenA partir de los registros de 1404 bovinos lecheros de la raza Siboney de 6 empresas ganaderas de la provincia de Camaguey se realizó un análisis estadístico para determinar que variable de las estudiadas influyeron sobre el intervalo interestral (IIE). Se determinó que todos los factores que influyeron sobre el IIE pueden ser corregidos con acciones de manejo y organización del trabajo, y corrobora que el IIE es un valioso elemento diagnóstico de la fertilidad del rebaño bovino que ref...

  10. Intervalo QT corto intermitente en un paciente con muerte súbita cardiaca

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    Dorantes-Sánchez,Margarita; López-Delgado,Amarily; Castro-Hevia,Jesús; Méndez-Rosabal,Annerys

    2011-01-01

    Se presenta el caso de un hombre de 21 años de edad, sin cardiopatía estructural demostrable por los métodos convencionales, reanimado de un episodio de muerte súbita cardiaca. Su historia familiar incluye dos hermanos muertos súbitamente en el primer año de vida. El paciente tuvo diez episodios de taquicardia ventricular (varios de ellos registrados), uno de ellos lo llevó al evento de muerte del cual fue reanimado. Las anormalidades electrocardiográficas fueron un intervalo QT corto intermi...

  11. ESTIMACIÓN DE LA HEREDABILIDAD DEL INTERVALO DE PARTOS EN BOVINOS CRUZADOS

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    Oscar Vergara G

    2008-04-01

    Full Text Available Objetivo. Estimar la heredabilidad del intervalo de partos en bovinos cruzados. Materiales y métodos. Se utilizó información de la base de datos de la hacienda La Leyenda, ubicada en el municipio de Caucasia (Antioquia. Se realizó un análisis uni-característico empleando el modelo animal. En el modelo se consideraron los efectos fijos del grupo genético, año de nacimiento, época de nacimiento y el número de partos y como efectos aleatorios, el efecto aditivo directo, de ambiente permanente y residual. Resultados. Se obtuvo una heredabilidad de 0.15 ± 0.07 y una media fenotípica de 544 ± 97 días. Conclusión. La heredabilidad para el intervalo de partos fue baja, por lo que se puede lograr poco progreso genético seleccionando para esta característica.

  12. La actividad física, el entrenamiento continuo e intervalo: una solución para la salud

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    Ricardo Ortiz-Pulido

    2017-01-01

    Full Text Available El propósito de este documento fue reportar los beneficios de la actividad física, entrenamientointervalo y entrenamiento continuo moderado en adultos sedentarios y físicamente activos.La actividad física involucra cualquier movimiento corporal que produce un aumento en elgasto energético en el metabolismo, mientras que el entrenamiento intervalo y entrenamientocontinuo moderado puede ser utilizado para controlar el programa de cargas de entrenamiento(intensidad, volumen y pausa. Los beneficios que se han reportado cuando se realiza actividadfísica son: el incremento o mantenimiento de la condición física muscular, funciones cognitivas,cardiorespiratoria, equilibrio, peso corporal, control de la obesidad; todos ellos disminuyen losriesgos de enfermedades cardiovasculares, enfernedades crónicorrespiratorias, diabetes, presiónalterial alta, sindrome metabolico, cáncer de colon, depresión y todas las causas de mortalidad.En contraste, la falta de actividad fisica ha ha sido identificada como factor de riesgo y estáasociada a diversas enfemedades no transmisibles a nivel mundial. En este documento puntua-lizamos dos tipos de entrenamiento que han tenido aplicaciones para la salud en adultos. Estetrabajo podría ayudar a promover la salud calidad de vida de la población adulta y eliminar elsedentarismo mediante la prescripción de la actividad física para la salud.

  13. Tamaños de muestra para estimar prevalencia animal que aseguran cortos intervalos de confianza

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    Osval Antonio Montesinos López

    2011-01-01

    Full Text Available El cálculo del tamaño de las muestras juega un rol importante en el diseño óptimo de experimentos veterinarios y agrícolas para la estimación de proporciones de una población, incluyendo la prevalencia de enfermedades. Esta investigación propone un método de tres pasos para determinar el tamaño de muestra exacto para datos binomiales que asegura precisión en la estimación de la proporción, y muestra numéricamente el grado de subestimación que produce el uso de la fórmula tradicional (aproximación normal para el cálculo del tamaño de la muestra. El paso 1 obtiene un tamaño de muestra que garantiza que la anchura relativa completa del intervalo de confianza ( r w es más estrecha que la amplitud deseada (re, el paso 2 incrementa iterativamente el tamaño de muestra hasta que r w es mas pequeño que la amplitud deseada (re con un grado de certeza especificado (w y el paso 3 obtiene el número de conglomerados requeridos. Datos simulados fueron creados para ilustrar el método propuesto, además se presenta un cuadro con escenarios útiles para los investigadores. Un programa en el paquete estadístico R es dado y explicado, de tal manera que reproduce los resultados de una manera sencilla.

  14. La actividad física, el entrenamiento continuo e intervalo: una solución para la salud

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    Ricardo Ortiz-Pulido; Julio A. Gómez-Figueroa

    2017-01-01

    El propósito de este documento fue reportar los beneficios de la actividad física, entrenamientointervalo y entrenamiento continuo moderado en adultos sedentarios y físicamente activos.La actividad física involucra cualquier movimiento corporal que produce un aumento en elgasto energético en el metabolismo, mientras que el entrenamiento intervalo y entrenamientocontinuo moderado puede ser utilizado para controlar el programa de cargas de entrenamiento(intensidad, volumen y pausa). Los benefic...

  15. Música para matar o tempo intervalo, suspensão e imersão

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    Rose Satiko Gitirana Hikiji

    2006-04-01

    Full Text Available Discuto neste artigo algumas relações da música com o tempo, em especial a relação entre as temporalidades dos grupos de crianças e jovens que pesquisei e certas propriedades do tempo da prática musical. Na pesquisa com alunos de um projeto governamental de ensino musical (Projeto Guri/ São Paulo, ouvi como principal justificativa para a procura pela música, a necessidade de "matar o tempo". Na perspectiva do senso comum, o tempo "ocioso" é um tempo perigoso. Para pais e proponentes, é preciso "ocupar o tempo" das crianças e jovens, é preciso "tirá-los da rua". Analiso aqui o processo de atribuição de valor negativo ao tempo livre e a especificidade do tempo do fazer musical. Aproximo o tempo musical do tempo do jogo, caracterizado pela imersão e pela suspensão do cotidiano. Analiso, finalmente, como o tempo para a música, inicialmente um intervalo, transborda para o resto da vida cotidiana, determinando ritmos, preenchendo vazios, construindo sentidos.This article discusses some of the relations between music and time, in particular the temporalities of groups of children and youths I have researched, and certain properties of music making time. In my research with students from a government musical education project (Guri Project/ São Paulo, the main reason given for studying music was their need to ‘kill time.’ From a common sense point of view, ‘idle’ time is dangerous time. Parents and project organizers stress the need ‘to occupy the time’ of children and youths, ‘to take them off of the streets.’ Here I analyze the negative evaluation of free time and the specificity of music making time. Musical time is compared with play time, characterized by an immersion in the activity and by the suspension of daily life. Finally, I ask how the time for music, initially an interval, overflows into the rest of the daily life, determining rhythms, filling empty spaces and building meanings.

  16. Efeito da composição genética e de fatores de meio sobre a produção de leite, a duração da lactação e a produção de leite por dia de intervalo de partos de vacas mestiças Holandês-Gir Effects of genetic composition and environmental factors on milk production, lactation length and milk production per day of calving interval in crossbred Holstein-Gyr cows

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    J.R. Glória

    2006-12-01

    Full Text Available Utilizou-se o método dos quadrados mínimos para avaliar os efeitos da composição genética (CG e dos fatores de meio sobre a produção total de leite (PL, duração da lactação (DL e produção de leite por dia de intervalo de partos (P/I (n=2.016 de 822 vacas mestiças (1/2, 3/4 e 7/8 Holandês-Gir, criadas no oeste de Minas Gerais. O efeito da capacidade prevista de transmissão (PTA dos touros da raça Holandesa sobre a PL de suas filhas cruzadas também foi avaliado. O efeito da CG sobre as três características foi importante fonte de variação, sendo que a PL, a DL e a P/I aumentaram com o incremento da contribuição da raça Holandesa. As médias para PL foram 3549,3±39,3kg, 4331,7±56,2kg e 4515,7±115,9kg; para DL, 306,5±1,9 dias, 328,2±2,5 dias e 337,0±4,6 dias; e para P/I, 9,0±0,1kg, 10,6±0,2kg e 11,0±0,3kg por dia, respectivamente, para vacas 1/2, 3/4 e 7/8 Holandês-Gir. Estação de parição foi importante fonte de variação da PL das vacas 3/4 e da DL de vacas 3/4 e 1/2 Holandês-Gir. Maiores PL e DL foram observadas nas lactações iniciadas no final do período chuvoso. O efeito da idade da vaca ao parto sobre a PL foi linear ascendente para vacas 1/2 e 3/4 Holandês-Gir e curvilíneo para vacas 7/8 Holandês-Gir, com produção máxima (4733,5 kg na segunda lactação. Para DL esse efeito foi curvilíneo para vacas 1/2 e 3/4 Holandês-Gir, com mínimos de 284,7 e 309,2 dias aos 7,3 e 5,7 anos de idade, respectivamente; e linear descendente para vacas 7/8 Holandês-Gir. Já o efeito da idade da vaca sobre P/I foi linear ascendente para o conjunto 3/4 e 7/8, e curvilíneo para as 1/2 Holandês-Gir, com o máximo de 9,5kg/dia de intervalo de partos aos 6,4 anos de idade. O efeito do PTA de touros sobre a PL de suas filhas não foi diferente de zero. As estimativas de repetibilidade para PL foram 0,72, 0,69 e 0,63, respectivamente, para vacas 1/2, 3/4 e 7/8 Holandês-Gir.The effects of genetic composition (GC and

  17. Ajuste digital del cero y el intervalo de medida en un transmisor con salida analógica

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    Jorge Ramírez Beltrán

    2010-11-01

    Full Text Available Normal 0 21 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Normal 0 21 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Por lo general, los transmisores de presión se fabrican para ser utilizados en un intervalo fijo de medición. Contar con un transmisor de rango variable representa una ventaja notable para muchos usuarios interesados en trabajar en diferentes intervalos de medición. Con la realización de este trabajo se obtuvo un transmisor de presión con salida analógica que permite ser ajustado digitalmente en cero e intervalo de medida según las necesidades de cada usuario. Para ello fue necesario partir de un algoritmo básico de compensación y calibración, y desarrollar e implementar un procedimiento matemático a fin de lograr el ajuste digital del intervalo deseado utilizando un microprocesador. También se diseñaron y analizaron las principales funciones que debe realizar un programa de obtención de coeficientes básicos y un programa de usuario. Este último es el que permite entre otras opciones conectarse al transmisor desde una PC y cambiar el rango de medición del

  18. Interpretando correctamente en salud pública estimaciones puntuales, intervalos de confianza y contrastes de hipótesis

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    Scotto Manuel G

    2003-01-01

    Full Text Available El presente ensayo trata de aclarar algunos conceptos utilizados habitualmente en el campo de investigación de la salud pública, que en numerosas situaciones son interpretados de manera incorrecta. Entre ellos encontramos la estimación puntual, los intervalos de confianza, y los contrastes de hipótesis. Estableciendo un paralelismo entre estos tres conceptos, podemos observar cuáles son sus diferencias más importantes a la hora de ser interpretados, tanto desde el punto de vista del enfoque clásico como desde la óptica bayesiana.

  19. Intervalos de referencia de minerales en cerdos confinados de diferentes genéticas y categorías

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    LUNA ML

    2017-08-01

    Full Text Available En Argentina, no existen datos regionales de intervalos de referencia de minerales en cerdos según las líneas genéticas actuales y distintas categorías de producción en sistema intensivo. Por ello, el objetivo del presente estudio fue determinar intervalos de minerales: calcio, fósforo, magnesio, sodio, potasio, hierro, cobre y cinc, en suero de cerdos en establecimientos del centro de Santa Fe y de Entre Ríos. Se trabajó con 300 muestras de sangre de cerdos sanos de dos líneas genéticas diferentes en las categorías de lechones recién nacidos, lechones destetados, hembras nulíparas gestantes seleccionadas fenotípicamente para la reposición del plantel, y hembras multíparas gestantes. Se determinaron las concentraciones séricas de los minerales por espectrofotometría de absorción atómica (FAAS con un equipo Perkin Elmer modelo Analys 200, con métodos oficiales de AOAC. Se analizaron también muestras de agua. Los intervalos de referencia se calcularon utilizando parámetros paramétricos o no paramétricos dependiendo de la distribución de los datos. Los valores medios, medianas, valores mínimo y máximo e intervalos de referencia, para los distintos minerales en cada categoría productiva, se presentan en tablas. Los intervalos de referencia calculados serán útiles para el diagnóstico de deficiencias mineral y la vigilancia nutricional en cerdo de producción de carne. SUMMARY. Mineral reference intervals in confined swine with different genetic background and categories. In Argentina, there is no regional data on mineral reference intervals in swine, according to the genetic lines, categories of production in intensive systems. The objective of this study was to establish ranges of the following serum minerals: calcium, phosphorus, magnesium, sodium, potassium, iron, copper and zinc, in swine farmed in Santa Fe and Entre Ríos. Blood samples were collected from 300 healthy pigs of two different genetic lines belonging

  20. Determination of conversion factors of kerma and fluence to ambient dose equivalent for X-rays generated between 50 kV{sub p} to 125 kV{sub p}; Determinacao dos fatores de conversao de kerma no ar e de fluencia para o equivalente de dose ambiental para raios-X gerados no intervalo de 50 kV{sub p} a 125 kV{sub p}

    Energy Technology Data Exchange (ETDEWEB)

    Nogueira, Maria do Socorro

    1997-12-31

    The ambient dose equivalent was determined experimentally on the interval of energy of X ray applied in diagnostic radiology. A PMMA sphere was used to simulate the trunk human (phantom), based on the definition of the report ICRU 39. The absorbed dose in different positions in the phantom was determined using LiF-TLD 100. The X ray spectra were measured with a high-purity germanium detector (HP Ge). It was also determined the HVL and the effective energy in this energy range. The conversion coefficient of the K{sub air} and {Phi} to H{sup *}(d) were determined to 10, 50 and 60 mm deep in the PMMA sphere. The obtained values were compared with data of the literature. The maximum uncertainty obtained for the coefficients was 7.2%. All parameters were also determined to the X ray quality of the incident and transmitted beam by the patient, according to the recommendation of the standard DIN 6872. The conversion factor was calculated for those situations where the X-ray beam is transmitted by a layer and Pb and it is necessary to estimate the effective dose, as in the case of shielding project of radiology diagnosis room. (author) 51 refs., 35 figs., 15 tabs.

  1. Estimación de la Heterosis para Producción de Leche Vendible, Intervalo entre Partos y Duración de la Lactancia en Ganado Cruzado

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    Montoya S. Camilo

    1998-12-01

    Full Text Available En la presente investigación se revisaron 4948 datos referentes a lactancias de vacas en razas B taurus y B indicus, los cuales se obtuvieron entre los años 1986 y 1994 en las Ganaderías La Unión y La K, localizadas en los municipios Plato y Santa Ana en el departamento de Magdalena; San Fernando Pinillos y Magangué en el departamento de Bolívar; y Playones de Sucre y Buenavista en el departamento de Sucre. Para determinar la influencia de los diferentes efectos tanto genéticos como no genéticos sobre las características a estudiar, se utilizó el programa de mínimos cuadrados de Harvey (1988. Los efectos tenidos en cuenta en los modelos para las características leche vendible, días de lactancia e intervalo entre partos fueron: El grupo genético materno, la época y año de parto, número de parto, y hato. Como cavariables se tuvieron en cuenta el peso al destete, la producción de leche duración de la lactancia y el intervalo entre partos según el modelo a estudiar. De los factores 110 genéticos la gran mayoría dieron efecto significativo a los niveles del (P~0.05; no presentaron significancia la época para la duració1l de la lactancia y el grupo genético para el intervalo entre partos; y las covariables intervalo entre partos para la producción de leche y producción de leche en el modelo para el intervalo entre partos. La estimación de la heterosis se hizo una vez realizados los contrastes ortogonales entre los grupos genéticos para las características en las cuales el grupo racial presentó significancia en los ANAVAS. La heterosis obtenida para la producción de leche teniendo como base el promedio de las raza Criolla y el promedio entre el Criollo y el Cebú fue respectivamente: ½ Taurus-1/2 Criollo (17.95% y 22.5%; ½ Taurus - ½ Cebú (9% y 14%; Trihíbrido (7.7% y 11. 7%; ¼ Taurus- ¾ Cebú (5% y 9%; ½ Cebú- ½ Criollo (1.05% y 4.8%; y el ¾ Cebú- ½ Criollo (-7.88% y -4.46%; todas altamente

  2. Intervalos de referencia para concentraciones séricas de T3 y T4. Estudio preliminar

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    Cecilia Miranda Pantoja

    2013-12-01

    Full Text Available Fundamento: la determinación cuantitativa de las hormonas tiroideas T3 y T4 reviste gran importancia en el diagnóstico y la evaluación del hipertiroidismo, en especial del hipertiroidismo aislado causado por T3.Objetivo: establecer los intervalos de referencia de T3 y T4 en el laboratorio de medicina nuclear del Hospital General Universitario Dr. Gustavo Aldereguía Lima de Cienfuegos. Métodos: estudio descriptivo y prospectivo realizado mediante el método de radioinmunoanálisis, competencia que se establece entre la T3 y T4 sin marcar, y la marcada por un número limitado de los sitios de unión del anticuerpo específico. Al hacer reaccionar una cantidad fija de trazador y anticuerpo con diferentes cantidades del ligando sin marcar, la cantidad de trazador unido por el anticuerpo será inversamente proporcional a la concentración del ligando sin marcar. Resultados: los valores obtenidos se describen según una distribución gaussiana (media aritmética = 117, desviación estándar =31 para T4; media aritmética = 2,64, desviación estándar = 0,64 para T3, comprobado mediante un test de Chi cuadrado. Los rangos de valores normales obtenidos fueron de de 55 – 178 nmol/L y 1,4 – 3,9 nmol/L para T4 y T3 respectivamente. Conclusiones: los intervalos de referencia obtenidos resultaron más amplios que los propuestos por el productor, sobre todo en el caso de T4.

  3. Efeito do Exercício com 1 e 3 Minutos de Intervalo de Descanso Entre as Séries na Atividade Sérica das Transaminases

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    Ramon Martins Alves

    2011-12-01

    Full Text Available O treinamento de força (TF intenso ocasiona danos na estrutura muscular, que podem ser detectados por meio de marcadores indiretos. OBJETIVO. Verificar se há alterações na atividade da creatina quinase (CK, da aspartato transaminase (AST e alanina transaminase (ALT com o TF em diferentes intervalos entre séries e exercícios. MÉTODOS. Treze voluntários (± 21,8 anos; ±173,6 cm; ±68,3 kg realizaram o teste de uma repetição máxima (1RM nos exercícios: supino reto, puxada (pulley, desenvolvimento sentado, tríceps (pulley e rosca bíceps. Após sete dias, todos foram submetidos a uma coleta de sangue (PRE e realizaram 4 séries máximas até a falha concêntrica com intensidade de 85% de 1RM e intervalos de 1 ou 3 minutos entre as séries e exercícios. Todos retornaram ao mesmo local 24, 48 e 72 horas após a sessão para mais uma coleta de sangue. Repetindo os procedimentos após uma semana, porém os voluntários que realizaram o teste com intervalo de 1 minuto na semana seguinte manteriam intervalos de 3 minutos e vice-versa. Realizou-se ANOVA mantendo como significância p<0,05. RESULTADOS. Houve redução significativa do número de repetições a cada série de todos os exercícios com 1 e 3 minutos de intervalo. Observou-se um aumento significativo da atividade sérica de CK e de AST 24, 48 e 72 horas utilizando ambos os intervalos. ALT não se alterou. CONCLUSÃO. O TF causou aumento na atividade de CK e AST, mas sem apresentar diferenças com os intervalos utilizados. Porém, pequenos intervalos reduzem o volume total de repetições.

  4. Una aplicación de las funciones débilmente contractivas a problemas de valor en la frontera de funciones con valores en intervalos

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    Vladimir Angulo-Castillo

    2014-01-01

    Full Text Available Se estudia la existencia y unicidad de soluciones para problemas de valor en la frontera asociadas a ecuaciones diferenciales de funciones con valores en intervalos, usando la derivada de Hukuhara y algunos teoremas de punto fijo de funciones débilmente contractivas definidas en conjuntos par- cialmente ordenados.

  5. Reevaluación del paciente periodontal: intervalo de tiempo adecuado para reevaluar sus parámetros

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    Berenice Flores Díaz

    2017-07-01

    Full Text Available La reevaluación es uno de los pasos del tratamiento periodontal enfocados en determinar los resultados de la terapia inicial y la necesidad de terapias de soporte adicionales. El objetivo del artículo es revisar la información relacionada al intervalo de tiempo para la reevaluación los signos de progresión de la enfermedad periodontal apropiado para medir los efectos de la terapia inicial. Después de este período de tiempo, la estabilidad del periodonto debe ser evaluada en lugar de los efectos de la terapia. Conclusión: En síntesis el establecimiento de la nueva unión dento-epitelial se realiza de manera rutinaria por lo que se sugiere la reevaluación después de 2 semanas. Luego del raspado y alisado radicular hay restablecimiento del epitelio de unión al diente la super cie en 1 a 2 semanas el tejido conjuntivo continúa durante 4 a 8 semanas pero más de 2 meses puede ser demasiado tiempo porque las bacterias patógenas ya han repoblado las bolsas periodontales.

  6. ESTRATEGIA PARA REDUCIR INTERVALOS DE INCERTIDUMBRE APLICADA EN LOCALIZACIÓN DE FALLAS EN SISTEMAS DE DISTRIBUCIÓN

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    César Augusto Orozco Henao

    2012-01-01

    Full Text Available El método de localización propuesto en este artículo se basa en una estrategia iterativa que determina el valor mínimo de la reactancia de falla, utilizando la técnica de reducción de intervalos de incertidumbre de Fibonacci. Esta técnica mejora el método de localización de fallas debido a que aumenta su precisión, mediante la aplicación de un tamaño de paso variable para determinar el valor absoluto de la reactancia de falla. La estrategia utiliza las mediciones de tensión y corriente en la subestación, por lo tanto, considera las variaciones en los estados de pre-falla y falla. El método se valida en el sistema de prueba IEEE 34 nodos conformado por laterales monofásicos, bifásicos y trifásicos, para todos los tipos de fallas y considerando resistencias de falla entre 0 y 40ohms. Los resultados obtenidos muestran errores de estimación inferiores al 1,8%, lo cual confirma la validez de la propuesta.

  7. Efecto de las consecuencias diferenciales e intervalo de retención en la recuperación de información en niños

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    Berenice Chávez

    2007-07-01

    Full Text Available Se examinó el efecto del intervalo de retención y del procedimiento de consecuencias diferenciales (PCD en la recuperación de la información en una tarea de discriminación inversa en niños, en tres experimentos. El primer experimento estudió el efecto de un intervalo de retención de 48 h en una tarea de igualación a la muestra que involucró el aprendizaje de relaciones de formas coloreadas a través de una fase de adquisición, una fase de inversión, y después de diferentes demoras, una fase final de prueba. El segundo experimento estudió el efecto del PCD en las dos fases de una discriminación inversa. En el tercer experimento se exploró el efecto de un intervalo de retención de 48h y el PCD en la recuperación espontánea de la discriminación original. Los resultados del experimento 1 demostraron la recuperación espontánea de la discriminación original cuando se presentó un intervalo de retención de 48 h. El experimento 2 demostró que el PCD no tiene efectos en las dos fases de una tarea de discriminación inversa. En el experimento 3 se observó una interacción entre el intervalo de retención y el PCD, en la que el PCD (grupo CD1-48h puede mejorar la recuperación de la respuesta de la primera fase (i. e. aumento de la recuperación espontánea mientras el PCD en la fase 2 (grupo CD2-48h mejoró la persistencia de la fase de inversión (i. e. disminución de la recuperación espontánea. Se sugiere que la presencia del PCD genera expectativas condicionadas acerca del reforzador que pueden funcionar como señal contextual que interactúan con el intervalo de retención para modular la recuperación de la información demorada.

  8. Prevalencia y comportamiento de los factores de riesgo del síndrome metabólico según los diferentes intervalos de edad, en una población femenina del área de influencia de la Clínica Las Américas, en Medellín - Colombia Prevalence and behaviour of risk factors in metabolic syndrome according to different age intervals, in a female cohort of the area of influence of the Clínica de las Américas in Medellín, Colombia

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    Fabio Sánchez

    2008-06-01

    Full Text Available Antecedentes: el síndrome metabólico es una entidad de alto impacto epidemiológico, compuesto por elementos que tienen como sustrato común la resistencia a la insulina y son factores de riesgo para desarrollar enfermedad cardiovascular y diabetes. Objetivos: determinar la prevalencia del síndrome metabólico y describir el comportamiento de sus componentes en las diferentes etapas de la vida femenina, según la clasificación del National Cholesterol Education Program and Adult Treatment Panel III (ATP III y la definición del consenso mundial de la International Diabetes Federation (IDF 2005. Diseño y Métodos: estudio descriptivo de corte transversal, en el cual se incluyeron 271 voluntarias divididas en tres grupos etáreos (menores de 40, entre 40 y 64 y mayores de 65 años quienes tuvieron evaluación clínica y por laboratorio con el fin de determinar la prevalencia de los factores de riesgo que constituyen el síndrome metabólico según las clasificaciones descritas. Resultados: la prevalencia del síndrome metabólico fue mayor al aplicar la definición de la IDF y significativamente superior en quienes superaban los 65 años para las dos clasificaciones, en comparación con las menores de 40 años. En las mujeres con diagnóstico de síndrome metabólico, el número de factores de riesgo incrementó con la edad al aplicar los criterios del ATP III. Conclusiones: el síndrome metabólico en la mujer, es una manifestación multifactorial en la cual la edad y el estado menopáusico son importantes factores que predisponen a padecerlo. Los resultados son aplicables a poblaciones de estrato socioeconómico medio y medio-alto de la ciudad y se asemejan a hallazgos publicados por otros autores.Background: metabolic syndrome is a high impact epidemiologic entity made up of elements with a common substrate that is insulin resistance which is a risk factor for developing cardiovascular disease and diabetes. Objectives: to determine the

  9. Crescimento de alface hidropônica sob diferentes intervalos de irrigação Hydroponic lettuce growth under differents irrigation intervals

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    Fábio Zanella

    2008-04-01

    Full Text Available O intervalo entre irrigações é um importante critério a ser observado durante o cultivo hidropônico de hortaliças. Nesse contexto, objetivou-se com este trabalho avaliar a produtividade de duas cultivares de alface (Lactuca sativa L., Regina 2000 e Lucy Brown sob três intervalos de irrigação. O experimento foi conduzido no Centro Universitário Luterano de Ji-Paraná (CEULJI/ULBRA, entre setembro e dezembro de 2006. Foram testados três intevalos entre irrigações: 5; 15 e 30 minutos. Cada tratamento constou de quatro repetições de cada cultivar, em delineamento inteiramente casualisado. Analisou-se o número de folhas.planta-1, a massa fresca e massa seca total de cada planta. O aumento no intervalo entre irrigações levou a uma menor produção da alface. Assim, o intervalo de 5 minutos entre irrigações promoveu o maior ganho de massa para as duas cultivares avaliadas.The interval among irrigations is an important criterion taken into account during the hidroponic cultivation of vegetables. Thus, the present work aimed to evaluate the productivity of two lettuce (Lactuca sativa L. cultivars, Regina 2000 and Lucy Brown, in three irrigations intervals. The experiment was carried out at the Centro Universitário Luterano de Ji-Paraná (CEULJ/ULBRA, from September to December 2006. Three intervals between irrigations were used: 5; 15 and 30 minutes. Each treatment had four replications of both cultivars, in a complete randomized outline. The number of leaves.plant-1, total fresh mass and total dry mass were analyzed. There was an increase of the lettuce production according to the increase of the irrigation interval. Thus, 5 minutes among irrigations promoted the greater gain of mass for both cultivars evaluated.

  10. INTERVALOS DE INTEGRACIÓN UNIFICADOS PARA LA CARACTERIZACIÓN ESTRUCTURAL DE PETRÓLEOS, CARBONES O SUS FRACCIONES POR RMN 1H Y RMN 13C

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    Avella Eliseo

    2010-09-01

    Full Text Available Con base en la revisión de publicaciones, hechas entre 1972 y 2006, se evidenció que hay imprecisiones en los límites de los intervalos de integración que los autores asignan a las señales en resonancia magnética nuclear (RMN para hacer la caracterización estructural de petróleos, carbones o sus fracciones derivadas, a partir de sus espectros de hidrógeno (RMN 1H o de carbono (RMN 13C. En consecuencia, se determinaron límites unificados para la integración de los espectros RMN 1H y RMN 13C de tales muestras mediante un tratamiento estadístico aplicado a los límites de los intervalos de integración ya publicados. Con esos límites unificados se elaboraron cartas de correlación en RMN útiles para la asignación de la integral en esos intervalos, y aun en otros de menor extensión definidos en función de la intersección entre asignaciones diferentes. Además se plantearon ecuaciones necesarias para establecer la integral atribuible a fragmentos más específicos en un intento por hacer una caracterización estructural más exacta a partir de los espectros RMN de petróleos, carbones o sus fracciones derivadas.

  11. Efeito do ensacamento de cachos de banana 'Nanicão' na produção e no intervalo entre inflorescência e colheita

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    Costa José Nilton Medeiros

    2002-01-01

    Full Text Available O objetivo deste trabalho foi avaliar o efeito do ensacamento de cachos de bananas (Musa sp. AAA, cultivar Nanicão, em diferentes épocas, na produção e no intervalo entre inflorescência e colheita. O experimento foi realizado no Município de Tietê, SP, em blocos ao acaso, em esquema fatorial 2x3, com quatro repetições. O ensacamento foi efetuado com sacos de polietileno em três épocas: 21/5/96, 17/12/96 e 26/2/97. Foram avaliados o intervalo entre emergência da inflorescência e colheita, a massa do cacho e o comprimento, diâmetro e densidade do fruto. A interação ensacamento x épocas não foi significativa em relação a nenhuma das variáveis. O ensacamento diminuiu o intervalo entre a emergência da inflorescência e a colheita na primeira (21/5/96 e segunda época (17/12/96.

  12. Perfil lipídico: intervalos de referência em escolares de 2 a 9 anos de idade da cidade de Maracaí (SP

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    Seki Mario

    2003-01-01

    Full Text Available INTRODUÇÃO: As recentes publicações disponíveis em nosso meio sobre dislipidemias na infância indicam progressão de uma silenciosa epidemia, que pode agravar as taxas de morbidade e mortalidade por doenças cardiovasculares nos próximos anos. Na falta de padronização dos intervalos de referência para população brasileira, muitos autores utilizam valores procedentes de outros países, em particular os recomendados pelas III Diretrizes Brasileiras Sobre Dislipidemias (III DBSD, 2001, que foram transcritos do National Cholesterol Education Program-NCEP (EUA, 1992. OBJETIVO: Estabelecer intervalos de referência para triglicerídeos (TG, colesterol total (CT e frações em escolares de 2 a 9 anos de idade da cidade de Maracaí, SP. MÉTODOS: delineamento transversal. Foram avaliados perfis lipídicos de 1.202 alunos de seis escolas (cinco públicas e uma privada, de 2 a 9 anos de idade, no período de 25 de março a 8 de outubro de 2002. Empregaram-se reações enzimáticas para determinações de TG e CT, kits Johnson & Johnson, metodologia de química seca e auto-analisador Vitros 750. Utilizaram-se reagentes magnéticos (sulfato de dextran e cloreto de magnésio, Johnson & Johnson para precipitação de LDL-c e VLDL-c e subseqüente determinação enzimática de HDL-c. O LDL-c foi obtido através de cálculo de Friedewald para TG abaixo de 400mg/dl; valores superiores a este foram determinados com kits Merck CHOD-PAP e leitura fotométrica. RESULTADOS: As exclusões totalizaram 266 casos e os analisados, 936. Os valores obtidos na amostra estudada diferem dos intervalos de referência recomendados pelas III DBSD. As maiores variações dos resultados de Maracaí, em relação às III DBSD, foram do percentil 95 de TG: 130mg/dl (+ 30%; percentil 75 de LDL-c: 101,1mg/dl (-8,1%; percentil 5 de HDL-c: 34mg/dl (-15%. DISCUSSÃO: os intervalos de referência transcritos de outros países desconsideram diferenças étnicas, socioecon

  13. Una aplicación de las funciones débilmente contractivas a problemas de valor en la frontera de funciones con valores en intervalos

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    Vladimir Angulo-Castillo

    2014-06-01

    Full Text Available Se estudia la existencia y unicidad de soluciones para problemas de valor en la frontera asociadas a ecuaciones diferenciales de funciones con valores en intervalos, usando la derivada de Hukuhara y algunos teoremas de punto fijo de funciones débilmente contractivas definidas en conjuntos parcialmente ordenados. Abstract. We study the existence and uniqueness of solutions for boundary value problems associated to differential equations of interval-valued functions, by using the derivative of Hukuhara and some fixed point theorems for weakly contractive mappings defined on partially ordered sets.

  14. EFECTO DEL INTERVALO DE PODA SOBRE LA BIOMASA FOLIAR Y RADICAL EN ÁRBOLES FORRAJEROS EN MONOCULTIVO Y ASOCIADOS

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    Fernando Casanova Lugo

    2010-06-01

    Full Text Available   El objetivo del presente trabajo fue evaluar el efecto de la poda a intervalos de 3 y 6 meses sobre el rendimiento de forraje, la relación hoja:tallo y la densidad de raíces finas en un banco de forraje de especies arbóreas. Se utilizaron 24 parcelas de 10 x 10 m de Leucaena leucocephala (Lam. de Wit (8 parcelas, Guazuma ulmifolia Lam. (8 parcelas y la asociación de ambas especies (8 parcelas. La poda a 3 meses incrementó hasta 3 veces el rendimiento de forraje acumulado (P

  15. Intervalo hídrico ótimo num nitossolo vermelho distroférrico irrigado Least limiting water range of an irrigated dystroferric red nitosol

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    Everton Blainski

    2009-04-01

    Full Text Available O manejo da irrigação tem-se baseado no controle do potencial da água no solo (Ψ como fator limitante do crescimento das plantas. Entretanto, outras variáveis podem influenciar a cultura mesmo que o Ψ não seja limitante. O Intervalo Hídrico Ótimo (IHO é um conceito de disponibilidade de água no solo que leva em consideração a porosidade de aeração e a resistência do solo à penetração em adição ao Ψ. O objetivo deste estudo foi quantificar o IHO num Nitossolo Vermelho distroférrico irrigado e utilizá-lo no estabelecimento de critérios para o manejo de água e do solo em áreas irrigadas. A resistência do solo à penetração foi a variável que limitou o IHO com maior frequência, diminuindo sua magnitude com o aumento da densidade do solo (Ds. Com o aumento da Ds, ocorreu redução na frequência com que θ manteve-se dentro dos limites do IHO. A Ds crítica (Dsc foi de 1,40 Mg m-3, indicando severa degradação física do solo para Ds > Dsc. Para Ds 2,0 MPa; para 1,28 -800 hPa visando ao controle da RP. Para áreas em que Ds > Dsc, medidas que visem a redução da Ds poderiam ser tomadas em função da severa degradação física do solo.The establishment of irrigation management has been based on the soil water potential (Ψ as a limiting factor for plant growth. However, other variables can affect crop growth even when Ψ is not limiting. The least limiting water range (LLWR is a concept of available water that take account the influence of aeration and soil resistance to penetration (SR in addition to Ψ. The objective of this study was to quantify the LLWR in an irrigated Dystroferric Red Nitosol and to use it to determine the soil and water management for irrigated areas. Soil penetration resistance limited LLRW most often, reducing its magnitude with the increase of soil bulk density (Bd. Therefore, the higher Bd, the less often θ was inside the limits of LLWR. The critical Bd (Bdc was 1.40 Mg m-3, indicating

  16. Intervalo hídrico óptimo en suelos argiudoles plantados con Eucalyptus dunnii Maiden Least limiting water range in argiudoll soils under eucalyptus dunnii maiden

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    Francisco Damiano

    2011-07-01

    Full Text Available El Intervalo Hídrico Óptimo (IHO es el rango de agua del suelo dentro del cual el crecimiento de la planta está menos limitado por el potencial de agua, la aireación y la resistencia del suelo a la penetración de raíces. El IHO es a menudo determinado en cultivos, pero su aplicación en estudios de plantaciones forestales son escasos. Los objetivos fueron: a estimar el IHO del suelo en plantaciones de Eucalyptus dunnii joven y adulto usando funciones de edafo-transferencia; b relacionar funcionalmente la frecuencia de humedad observada localizada fuera del IHO (p fuera con el IHO y determinar si la relación es influenciada por el tipo de suelo y las condiciones meteorológicas del período de crecimiento. Se estimó el IHO en suelos Argiudoles Típico y Abrúptico, usando funciones de edafo-transferencia (FT de retención hídrica y resistencia del suelo. La frecuencia de humedad observada fuera del rango del IHO (p fuera fue evaluada estadísticamente usando el modelo PROC CATMOD. El IHO aumentó de 0,009 cm³ cm-³ (horizonte Bt arcillo limoso a 0,207 cm³ cm-3 (horizonte C franco limoso. El modelo de regresión logística muestra que pfuera se relacionó negativamente con el IHO (R² = 0,83***. La pendiente del modelo (b1 = -30,5475 no varió por condiciones climáticas pero la ordenada al origen resultó influenciada por este parámetro (b o seco = 5,0083; b o húmedo = 3,5207. El modelo fundamental-empírico sostuvo al IHO como un indicador de calidad física del suelo apto para evaluar factores climáticos que inciden sobre el consumo de agua en eucaliptos.The Least Limiting Water Range (LLWR integrates water potential, aeration and mechanical resistance conditions that can be limiting to plant growth. The LLWR was often determined in field crops, but studies performed under tree plantations are scarce. In this study, soil LLWR was determined in young and mature Eucalyptus dunnii plantations using pedo-transfer functions. Frequency

  17. Avaliação da idade materna, paterna, ordem de paridade e intervalo interpartal para fissura lábio-palatina Maternal and paternal age, birth order and interpregnancy interval evaluation for cleft lip-palate

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    Daniella Reis Barbosa Martelli

    2010-02-01

    Full Text Available Fissuras do lábio e/ou palato representam as anomalias congênitas craniofaciais mais comuns. OBJETIVO: Avaliar fatores de risco ambientais em pacientes com fissuras lábio-palatinas não-sindrômicas, em um Serviço de Minas Gerais. CASUÍSTICA E MÉTODO: Realizou-se estudo caso-controle, avaliando 100 crianças com fissuras e 100 crianças sem alterações clínicas. As dimensões de análise (idade, cor de pele, sexo, classificação das fissuras, idade materna e paterna, ordem de paridade e intervalo interpartal foram obtidas a partir de um questionário, sendo posteriormente construído banco de dados e as análises realizadas pelo programa SPSS 17.0. Os resultados foram analisados com risco relativo para cada variável, para estimar odds ratios com intervalo de confiança de 95% seguido de análise bivariada e multivariada. RESULTADOS: Entre as 200 crianças, 54% foram do sexo masculino e 46% do feminino. Com relação à cor da pele, houve predomínio de parda, branca e preta, respectivamente. Entre os tipos de fissuras, as mais comuns foram as fissuras lábio-palatinas (54%, seguidas pela fissura labial (30% e fissura palatina (16%. CONCLUSÃO: Embora com uma população limitada, verificou-se associação entre idade materna e risco aumentado para fissuras lábio-palatinas, porém idade paterna, ordem de paridade e intervalo interpartal não foram significantes.Cleft lip and palate (CL/P are the most common congenital craniofacial anomalies. AIM: To evaluate environmental risk factors for non-syndromic CL/P in a reference care center in Minas Gerais. MATERIALS AND METHODS: we carried out a case-controlled study, assessing 100 children with clefts and 100 children without clinical alterations. The analysis dimensions (age, skin color, gender, fissure classification, maternal and paternal age, birth order and interpregnancy interval, obtained from a questionnaire; and later we build a data base and the analyses were carried out by the

  18. Intervalo hídrico ótimo e densidade crítica de um Latossolo Amarelo coeso sob diferentes usos no ecossistema Tabuleiro Costeiro

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    Camila Brasil Dias

    Full Text Available RESUMO Os impactos do uso e do manejo na qualidade física do solo têm sido quantificados, utilizando-se o intervalo hídrico ótimo e a densidade crítica do solo. O objetivo deste trabalho foi determinar o intervalo hídrico ótimo (IHO e a densidade crítica de um Latossolo Amarelo coeso, dos Tabuleiros Costeiros do Recôncavo da Bahia, submetido a diferentes usos e manejo do solo. Foram selecionadas três áreas, sobre solo coeso típico, submetidas aos seguintes usos e manejos: mata nativa (Mata Atlântica; pastagem de Brachiaria decumbens Stapf, em estado de degradação, e cana-de-açúcar, com subsolagem no sulco de plantio. Foram retiradas em cada área 40 amostras com estrutura indeformada, na porção central de cada horizonte (A e AB. Foram determinados nessas amostras, após serem submetidas a dez valores de tensão e pressão, a umidade, a resistência à penetração e a densidade do solo. Na área cultivada com cana, a coleta das amostras foi feita nas linhas de plantio, onde foi realizada a subsolagem. O intervalo hídrico ótimo do horizonte A, da mata, e do Ap, da cana-de-açúcar foram semelhantes e, ambos, maiores que na pastagem. Já no horizonte AB, o IHO da cana-de-açúcar foi maior que o da mata e, o desta, maior que o da pastagem. Os horizontes A e Ap apresentaram valores de densidade crítica maiores que os de AB para todos os usos avaliados. O uso que apresentou maior frequência de valores de densidade do solo acima da densidade crítica foi a pastagem.

  19. Intervalo hídrico ótimo utilizado como indicador da qualidade física em perímetro irrigado.

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    Thiago Lima da Silva

    2016-12-01

    Full Text Available Um dos principais parâmetros para se avaliar as condições físicas do solo é o Intervalo Hídrico Ótimo (IHO que tem como conceito a incorporação de uma faixa de quantidade de água, as limitações ao desenvolvimento das plantas por aeração, água disponível e resistência do solo à penetração das raízes. O objetivo neste trabalho foi avaliar o intervalo hídrico ótimo de um Latossolo amarelo distrófico com diferentes usos e manejos no perímetro irrigado Piauí, município de Lagarto-SE. Foram selecionados 4 (quatro  diferentes tipos de usos do solo que tivessem diferentes manejos agrícolas no perímetro irrigado Piauí e três profundidades 0-0,15 m; 0,15-0,30 m e 0,30-0,45 m avaliadas nesses sistemas. Os usos distintos consistiram em: a área sob cultivo de pimenteira malagueta (Capsicum frutensens L; b área sob cultivo de maracujazeiro amarelo (Passiflora edulis sims; c área sob cultivo de maracujazeiro em consórcio com pimenteira malagueta; d área sob pastagem (Brachiaria decumbens. O intervalo hídrico ótimo foi determinado por meio da curva de resistência à penetração e da curva de retenção da água no solo e mostrou-se importante indicador para avaliação da qualidade física do solo avaliado sob diferentes usos no perímetro irrigado Piauí, onde o manejo empregado no solo afetou a qualidade física deste, já que, em profundidades maiores todos os usos apresentam restrições ao desenvolvimento do sistema radicular, sendo que, a pastagem e o consórcio maracujá e a pimenteira apresentam essa restrição já na profundidade superficial 0-0-15m.

  20. Aceitação sensorial de híbridos de milho doce e híbridos de milho verde em intervalos de colheita

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    Jéssica da Silva Camilo; Vitor Hugo Barbosa Barbieri; Ramon Macedo Rangel; Deborah Santesso Bonnas; José Magno Queiróz Luz; Roberta Camargos de Oliveira

    2015-01-01

    A composição química e a textura dos grãos do milho doce estão, diretamente, relacionadas com as classes de endosperma que interferem na aceitação do produto pelos consumidores. Por isso, este trabalho teve por objetivo avaliar as características sensoriais de híbridos de milho doce e de híbridos de milho verde, em função de intervalos de colheita. O experimento foi instalado na Estação Experimental de Pesquisa da Syngenta Seeds Ltda, no município de Uberlândia-MG. O delineamento experimental...

  1. Impacto econômico do intervalo de partos em rebanhos bovinos leiteiros Economic impact of calving interval on dairy cattle herds

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    Marcos Aurélio Lopes

    2009-01-01

    Full Text Available Conduziu-se esta pesquisa com o objetivo de avaliar e quantificar o impacto econômico do intervalo de partos em rebanhos de gado de leite. Foram simulados, no software Dimensionamento e Evolução de Rebanhos Bovinos, três rebanhos bovinos leiteiros, de um sistema de produção hipotético composto por 25 fêmeas, da raça holandesa, com média de produção diária de 15 kg, com idade ao primeiro parto de 30 meses, mantidas em 200 ha cultivados com pastagem de Brachiaria decumbens Stapf. com capacidade de suporte de 1UA/ha/ano. A equivalência entre as categorias animais utilizadas foram: matrizes 1,30; fêmeas de 0 - 1 ano 0,30; fêmea de 1-2 anos 0,71; fêmeas de 2-3 anos 1,01 UA/ha. Os três rebanhos possuiam as mesmas taxas de descarte (20% e mortalidade (3% de 0 a 1 ano; 2% de a 1 a 2 anos e 1% de 2 a 3 anos diferindo apenas as taxas de natalidade, quais sejam 100; 80 e 60%, para os casos 1; 2 e 3, respectivamente refletindo em intervalos de partos de 365, 510 e 657 dias. A simulação do impacto econômico foi realizada no aplicativo MS Excel®. O intervalo de partos, afetou diretamente a composição e a evolução do rebanho e influenciou a rentabilidade da atividade leiteira, sendo mais eficiente o índice de natalidade 100%, ou seja, intervalo de partos de 12 meses.The aim of this study was to quantify and evaluate the economic impact of calving interval on dairy herd. A simulation using a Dimensioning and Evolution of Bovine Herd software was conducted on three dairy herds from a hypothetical production system composed by 25 females of Holstein breed, having an average of 15 kg daily milk production, at an age of 30 months after the first calving, kept in a 200 ha Brachiaria decumbens Stapf. pasture presenting an 1AU/ha/year support capacity. The equivalence among the tested animal categories were: dam cows 1.30; females of 0-1 year 0.30; females of 1-2 years 0.71; females of 2-3 years 1.01n AU/ha. The three herds showed the same

  2. Critérios para seleção do intervalo RR no eletrocardiograma para quantificação da arritmia sinusal respiratória

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    Renata Rodrigues Teixeira de Castro

    2000-02-01

    Full Text Available O sistema nervoso autônomo (SNA sofre importantes adaptações ao treinamento físico aeróbico e alterações na sua função estão relacionadas à gênese e prognóstico de várias doenças. A variação da freqüência cardíaca em função da respiração constitui fenômeno natural no qual se baseia o teste da arritmia sinusal respiratória (ASR, utilizado para avaliar o funcionamento do ramo parassimpático do SNA sobre o sistema cardiovascular. Calcula-se a ASR através da razão entre o maior intervalo R-R do eletrocardiograma (ECG durante a expiração (E e o menor R-R na inspiração (I. Não existe, na literatura, padronização para escolha destes intervalos quando o ECG é registrado durante dois ciclos respiratórios consecutivos. O objetivo deste trabalho é comparar os métodos de escolha desses intervalos, indicando qual o critério que permite melhor avaliação da magnitude da ASR. Cinqüenta e cinco voluntários jovens foram submetidos a dois testes de ASR, sendo cada teste composto por dois ciclos respiratórios consecutivos. Foram então comparados os dois maiores índices E/I obtidos das seguintes maneiras: 1 E e I retirados do mesmo ciclo respiratório (intraciclo; 2 E e I retirados de qualquer um dos ciclos respiratórios (ciclo independente. Os índices E/I ciclo-independentes (1º teste = 1,49 ± 0,03; 2º teste = 1,44 ± 0,03 foram maiores do que os índices E/I obtidos intraciclo [1º teste = 1,44 ± 0,03; 2º teste = 1,41 ± 0,03 (P < 0,001]. Os índices E/I ciclo-independentes do 1º teste foram maiores do que os do 2º teste (P = 0,04. A utilização de intervalos E e I escolhidos de forma independente do ciclo respiratório onde ocorreram permitiu observação da máxima variação da atividade parassimpática, mostrando a máxima magnitude da ASR. Em adendo, os resultados sugerem uma acomodação do reflexo no 2º teste, tornando desnecessária a realização deste quando o 1º prosseguir sem intercorr

  3. CARACTERÍSTICAS MORFOGÉNICAS Y SU INFLUENCIA EN EL RENDIMIENTO DEL PASTO MOMBAZA, COSECHADO A DIFERENTES INTERVALOS DE CORTE

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    Omar Ramírez Reynoso

    2009-11-01

    Full Text Available El objetivo del estudio fue determinar el flujo de tejidos y rendimiento por corte del pasto Mombaza (Panicum maximum Jacq., cosechado a tres intervalos de corte (IC: 3, 5 y 7 semanas, durante un año, en las épocas de sequía (10-nov-2006 a 09-jun-2007 y lluvias (10-jun a 06-nov-2007. Los tratamientos (IC se distribuyeron en 12 parcelas de 17.5 m2, mediante un diseño de bloques completos al azar, con cuatro repeticiones. El IC de 3 semanas promedió mayor tasa de aparición de hojas (0.185 hojas tallo-1 d-1 durante el estudio (P

  4. Comportamiento del Intervalo QT corregido prolongado en el síndrome coronario agudo, sin elevación del segmento ST

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    Amauris Modesto Valera Sales

    2015-12-01

    Full Text Available Se realizó un estudio descriptivo transversal prospectivo, para determinar el comportamiento del intervalo QT corregido prolongado, en pacientes con síndrome coronario agudo sin elevación del segmento ST, en el Centro Diagnóstico Integral “Los Arales”, San Diego, año 2009. El universo fue de 48 pacientes y la muestra incluyó a 29 pacientes con ECG normal o sin nuevos cambios isquémicos. Al ingreso se determinaron los valores del intervalo QT corregido, las variables demográficas, antecedentes personales, niveles enzimáticos de CK-MB y el score TIMI. Estos resultados se correlacionaron con la aparición de eventos clínicos (muerte, infarto no fatal y revascularización un mes después del ingreso. De los 29 pacientes analizados sólo 11 (38% presentaron eventos clínicos, mientras que los restantes 18 (62% no los tuvieron. Los pacientes con eventos presentaron valores del iQTc más prolongados por encima del punto de corte. En ambos grupos predominó el sexo masculino y el grupo de edad más frecuente fue el de 60 a 69 años. El tabaquismo, la hipertensión y la hipercolesterolemia fueron los más prevalentes para ambos grupos, así como el uso previo de aspirina. La estratificación de riesgo TIMI y los parámetros basales en los pacientes estudiados fueron mayores y revelan un mayor porcentaje en el grupo con eventos clínicos. Los resultados demuestran que el iQTc predice eventos adversos cardiovasculares hasta 30 días después del ingreso.

  5. Measuring quality indicators in the operating room: cleaning and turnover time Mensuración de indicadores de calidad en un centro quirúrgico: tiempo de limpieza e intervalo entre cirugías Mensuração de indicadores de qualidade em centro cirúrgico: tempo de limpeza e intervalo entre cirurgias

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    Marli de Carvalho Jericó

    2011-10-01

    Full Text Available This exploratory-descriptive study was carried out in the Surgical Center Unit of a university hospital aiming to measure time spent with concurrent cleaning performed by the cleaning service and turnover time and also investigated potential associations between cleaning time and the surgery's magnitude and specialty, period of the day and the room's size. The sample consisted of 101 surgeries, computing cleaning time and 60 surgeries, computing turnover time. The Kaplan-Meier method was used to analyze time and Pearson's correlation to study potential correlations. The time spent in concurrent cleaning was 7.1 minutes and turnover time was 35.6 minutes. No association between cleaning time and the other variables was found. These findings can support nurses in the efficient use of resources thereby speeding up the work process in the operating room.Este estudio exploratorio y descriptivo fue conducido en la Unidad de Centro Quirúrgico de un hospital de enseñanza teniendo por objetivos mensurar el tiempo utilizado para limpieza concurrente en sala de operación (por el Servicio de Higiene y Limpieza y el intervalo entre las cirugías; e, investigar las asociaciones entre: tiempo de limpieza, porte de la cirugía, especialidad de la cirugía, período de ocurrencia y tamaño de la sala. El estudio fue constituido de 101 casos de limpieza (estudio de tiempo de limpieza y 60 cirugías (estudio de intervalo entre cirugías. El método de Kaplan-Meier fue utilizado para el análisis del tiempo y la correlación de Pearson para el estudio de las asociaciones. El tiempo promedio de limpieza concurrente de la sala fue de 7,1 minutos y el del intervalo entre cirugías de 35,6 minutos. No fue encontrada correlación entre el tiempo de limpieza y las demás variables. Estos hallazgos instrumentalizan a los enfermeros en el uso eficiente de recursos, agilizando el proceso de trabajo en el Centro Quirúrgico.Este estudo exploratório-descritivo foi

  6. Materiales basados en aluminosilicatos de litio con coeficiente de expansión térmica negativos en un amplio intervalo de temperatura, procedimiento de preparación y uso

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    Torrecillas, Ramón; Fernández, Adolfo; García Moreno, Olga

    2008-01-01

    Materiales basados en aluminosilicatos de litio con coeficiente de expansión térmica negativos en un amplio intervalo de temperatura, procedimiento de preparación y uso. Nuevo procedimiento para la obtención de materiales cerámicos basados en aluminosilicatos de litio (LAS) con coeficiente de expansión térmica próximos a cero y negativos en el intervalo de temperatura (-150ºC a 450ºC). Estos materiales tienen su aplicación en la fabricación de componentes que requie...

  7. Intervalo de tempo para semeadura de milho pós-dessecação da cobertura de aveia-preta com herbicidas Establishment of corn seeding time interval after desiccation of oats with herbicides

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    Rodrigo Neves

    1999-12-01

    Full Text Available Com o objetivo de investigar o intervalo de tempo para semeadura de milho cultivado em sucessão à aveia-preta dessecada com herbicidas não-seletivos, realizou-se experimento fatorial na Estação Experimental Agronômica da UFRGS, em Eldorado do Sul, RS, em 1997/98. Um fator constou de quatro épocas de dessecação da aveia-preta (13, 9, 5 e 1 dia antes da semeadura do milho. O outro fator consistiu de quatro sistemas utilizados em pré-semeadura da cultura (aplicação do herbicida glyphosate "540gha-1 e.a." sobre plantas de aveia-preta ou sobre o solo sem sua presença; aplicação do herbicida paraquat "400gha-1 i.a." + diuron "200gha-1 i.a." sobre plantas de aveia-preta; e testemunha cuja semeadura do milho ocorreu na ausência de aveia-preta e de aplicação de herbicidas. Não se constatou interação entre os fatores testados. Com relação aos sistemas de pré-semeadura do milho, observou-se aumento na estatura acompanhado de decréscimo na massa seca de planta, tanto aos 20 como aos 40 dias após a emergência, quando o milho foi semeado na presença de resteva de aveia-preta em relação aquele semeado na sua ausência. Para intervalos de semeadura do milho pós-dessecação da aveia-preta, não ocorreram diferenças significativas tanto no desenvolvimento inicial das plantas, na estatura final, quanto no rendimento de grãos.With the purpose of evaluating time intervals for corn seeding after forage oats desiccation with non-selective herbicides, it was conducted a factorial trial in Agronomic Experimental Station of UFRGS, in Eldorado do Sul, RS, Brazil, in the 1997/98 growing season. One factor consisted of four times of oats desiccation (13, 9, 5 and 1 day before corn seeding. The other factor was four corn pre-seeding systems (glyphosate "540gha-1 e.a." herbicide applied on oat plants or on soil surface without oats; paraquat "400gha-1 i.a." + diuron "200gha-1 i.a." herbicide applied on oat plants; and a control in which corn

  8. Modelagem multicritério para seleção de intervalos de manutenção preventiva baseada na teoria da utilidade multiatributo

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    Adiel Teixeira de Almeida

    2005-04-01

    Full Text Available O problema de seleção de intervalos ou periodicidade para manutenção preventiva foi analisado através de um modelo de decisão multicritério. Este modelo de decisão apóia decisores na escolha da melhor combinação das conseqüências custo e confiabilidade, analisando um contexto de sistema de produção de serviços. O modelo de decisão é baseado na Teoria da Utilidade Multiatributo (MAUT. O artigo apresenta os principais aspectos teóricos e os elementos básicos utilizados para construção do modelo. Uma aplicação numérica é apresentada para ilustrar o uso do modelo de decisão.The problem of interval selection for preventive maintenance has been analysed through a multicriteria decision model. This decision model supports decision makers in choosing the best combination of consequences cost and reliability, analysing a context of service production systems. The decision model is based on the multiattribute utility theory (MAUT. The paper presents the main theoretical and practical aspects related to model building. A numerical application is presented in order to illustrate the use of the decision model.

  9. Estimativa do intervalo pós-morte em um canino (Canis lupus familiaris Linnaeus 1758 pela entomologia forense em Cabedelo-PB, Brasil: relato de caso

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    G. Martins

    2013-08-01

    Full Text Available O intervalo pós-morte (IPM é um instrumento importante de diagnóstico relacionado à prática forense. O uso de insetos tem sido relatado como um modo eficiente para estimá-lo, quando o cadáver encontra-se em estágio avançado de decomposição. Objetivou-se com este trabalho estimar o IPM com base em evidências entomológicas em um canino. Foram coletadas larvas de moscas no cadáver e encaminhadas ao laboratório de entomologia, onde foram criadas e eclodiram adultos da espécie Chrysomya albiceps (Wiedemann, 1819. Somando-se os dados abióticos de temperatura e umidade relativa do local de coleta e do local de criação, estimou-se um IPM mínimo de 3,34 dias do momento da postura dos ovos pelas moscas até a coleta das larvas. Com base nos resultados obtidos, conclui-se que a entomologia forense, como ferramenta para estimativa do IPM, mostrou-se eficaz e determinante na elucidação do caso em questão.

  10. Entomología forense: el ciclo de vida de la mosca verde Phaenicia eximia (Wiedemann (Diptera: Calliphoridae, como herramienta para estimar el intervalo post-mortem

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    Enio B. Cano

    2017-03-01

    Full Text Available Se estudió el ciclo de vida de la mosca verde Phaenicia eximia (Wiedemann en condiciones controladas de laboratorio a 26 o C, con una humedad relativa de 75% y un período de iluminación de 12 h de luz y 12 h de oscuridad. El tiempo promedio de desarrollo estimado desde la oviposición hasta la salida de los adultos fue de 306 h (una media de casi 13 días. Bajo estas condiciones de temperatura y humedad, los huevos duran cerca de 19 h (0.8 días, las larvas duran unas 170 h (7.1 días y las pupas unas 116 h (4.8 días. En los meses secos y fríos de noviembre y diciembre en condiciones naturales, el ciclo de vida empírico fue de 25 días, implicando que las bajas temperaturas ralentizan el crecimiento y las altas lo aceleran. Se discute acerca de la importancia del ciclo de vida en la estimación del intervalo post-mortem en casos de muertes violentas en Guatemala.

  11. Efeito da escopolamina sobre o desenvolvimento de Chrysomya putoria (Diptera: Calliphoridae e sua importância para a estimativa do intervalo pós-morte

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    Patricia Jacqueline Thyssen

    2011-09-01

    Full Text Available A presença de drogas nos tecidos de um corpo pode afetar o desenvolvimento de larvas de moscas necrófagas que são encontradas alimentando-se neste substrato. Essa observação já foi constatada para várias drogas tais como heroína, cocaína, certos analgésicos, e compostos anfetamínicos e benzodiazepínicos, entre outras. Assim, neste estudo investigamos o efeito da escopolamina – uma droga amplamente usada como analgésico – sobre a taxa de desenvolvimento de larvas de Chrysomya putoria (Diptera: Calliphoridae, visando também avaliar e quantificar as conseqüências de tal interferência para a estimativa do intervalo pós-morte (IPM. Os resultados aqui obtidos mostram claramente que a escopolamina afetou significativamente a taxa de desenvolvimento de imaturos de C. putoria, quando presente em seu substrato alimentar. Tendo em vista que o IPM em muitos casos é calculado levando em consideração o peso ou a idade dos imaturos coletados em um corpo, a não consideração deste fator de interferência negativa pode conseqüentemente levar a uma subestimativa do tempo de morte em até 48 horas, em certos casos.

  12. Intervalo entre o Nascimento de Gêmeos: Morbidade e Mortalidade do Segundo Gemelar Time Interval between Twin Delivery: Morbidity and Mortality in the Second Twin

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    Jair Luiz Fava

    2001-08-01

    Full Text Available Objetivo: avaliar o efeito do intervalo de tempo entre o nascimento de gêmeos sobre a morbidade e a mortalidade neonatal do segundo gemelar. Métodos: realizamos um estudo retrospectivo em 50 gemelíparas atendidas na Maternidade Pró-Matre de Vitória que pariram 100 recém-natos vivos, por via vaginal, com peso superior a 500 g e sem malformações maiores. Separamos os recém-natos em G1 (primeiro gêmeo e G2 (segundo gêmeo. Foram considerados como indicativos de morbidade neonatal: asfixia ao nascimento, caracterizada pelo índice de Apgar inferior a 7, no 1º minuto de vida; síndrome do desconforto respiratório, apurada à luz de dados clínicos e radiológicos, e tempo de internação hospitalar superior a 4 dias. Foi analisada também a mortalidade intra-hospitalar. Quanto ao estudo do intervalo de tempo de parturição entre os gêmeos (deltat, realizamos pontos de corte de 5 em 5 minutos, até 35 minutos. Fizemos, também, análise por faixas de tempo: deltat até 5 minutos, de 6 a 10, de 11 a 15, de 16 a 20 e de 21 a 150 minutos. Resultados: não houve diferença estatisticamente significante (pPurpose: to evaluate the impact of birth time interval between twins in relation to the morbidity and mortality of the second newborn twin. Methods: this is a retrospective study of 50 women with twin pregnancy at the `Maternidade Pró-Matre de Vitória' who gave birth to 100 alive newborns through the vaginal canal, weighing each over 500 g and not having any major malformations. The newborns were separated into two groups: G1 (first twin and G2 (second twin. The following criteria were considered to be indicative of newborn morbidity: asphyxia at birth, characterized by Apgar index lower than 7 in the first minute of life; respiratory distress syndrome detected by clinical and radiological findings, and hospitalization period longer than 4 days. In-hospital mortality was analyzed as well. Cut off was at every 5 minutes, up to 35 minutes

  13. Intervalo hídrico ótimo e produtividade de cultivares de soja Optimal water interval and yield of soybean cultivars

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    Amauri N. Beutler

    2006-09-01

    Full Text Available Determinar o intervalo hídrico ótimo e sua relação com a produtividade de soja, foi o que se objetivou com o presente estudo, razão por que se conduziu um experimento em Jaboticabal, SP, em Latossolo Vermelho de textura média. O delineamento experimental foi inteiramente casualizado, em parcelas subdivididas (seis níveis de compactação e quatro cultivares, com quatro repetições. Os níveis de compactação, foram: T0 = 0; T1* = 1; T1 = 1; T2 = 2; T4 = 4 e T6 = 6 passadas, no mesmo local, de um trator de 11 toneladas, perfazendo toda a superfície do solo. No tratamento T1* a compactação ocorreu quando o solo estava mais seco. Em dezembro de 2003 foram semeadas as cultivares de soja (Glycine max IAC Foscarin 31, MG/BR 46 (Conquista, BRS/MG 68 (Vencedora e IAC 8 - 2. Após a semeadura, coletaram-se amostras indeformadas de solo nas camadas de 0,03-0,06; 0,08-0,11; 0,15-0,18; e 0,22-0,25 m, para determinação da curva de retenção de água, de resistência do solo à penetração e do intervalo hídrico ótimo (IHO. Segundo o modelo do IHO, a densidade do solo crítica (Dsc à produtividade de soja varia entre as cultivares nos valores de 1,56 a 1,64 Mg m-3. A densidade do solo, a partir da qual a produtividade das cultivares de soja decresceu, foi superior à Dsc.The objective of this study was to determine the optimal water interval and its relationship with soybean yield. For this study, an experiment was carried out in Jaboticabal, São Paulo State, Brazil, in a Haplustox medium textured soil. The experimental design consisted of a completely randomized with subdivided plots (six compaction levels and four soybean cultivars, with four replications. The soil compaction levels were: T0 = 0, T1* = 1, T1 = 1, T2 = 2, T4 = 4 and T6 = 6 strides of a 11 ton tractor, on the same place, side by side on soil surface. In T1* the compaction occurred when the soil was dry. In December, 2003 the soybean (Glycine max, cultivars IAC Foscarin 31

  14. Efeito do tempo de intervalo da amostra ventilatória na variabilidade do consumo máximo de oxigênio (VO2 máx em jogadores de futebol profissional

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    Paulo Roberto Santos Silva

    1999-04-01

    Full Text Available O propósito deste estudo foi verificar, em futebolistas profissionais, o impacto de sete intervalos de tempo sobre a variável fisiológica consumo máximo de oxigênio (VO2 máx. Dezoito jogadores de futebol com média de idade de 24 ± 4 anos (18-31, peso de 72,5 ± 5,9kg (62-83 e estatura de 176,5 ± 7,0cm (164-188 foram submetidos a teste ergométrico máximo em esteira rolante, utilizando-se protocolo escalonado contínuo. A resposta de freqüência cardíaca (FC foi registrada por meio de um eletrocardiógrafo computadorizado de 12 derivações simultâneas. A ventilação pulmonar (V E, o consumo de oxigênio (VO2, a produção de dióxido de carbono (VCO2 e a razão de troca respiratória (RER foram calculadas a partir de valores medidos por um sistema espirométrico computadorizado. Os resultados deste estudo demonstraram que houve variabilidade significante do VO2 máx (p < 0,05 somente quando se comparou a resposta instantânea respiração-a-respiração (breath-by-breath em relação aos outros intervalos de tempos analisados (10, 20, 30, 40, 50 e 60 segundos, respectivamente. Concluindo, durante o exercício de intensidade progressiva, observou-se que o aumento do VO2 foi proporcional à diminuição do intervalo de tempo da coleta ventilatória. O tempo de intervalo maior subestimou esse aumento. Assim, sugere-se que o avaliador utilize intervalos médios na faixa de tempo entre 10 e 60 segundos, pois não foi verificada diferença estatística significante entre esses intervalos.

  15. Qualidade física e intervalo hídrico ótimo em latossolo e cambissolo, cultivados com cafeeiro, sob manejo conservacionista do solo

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    Milson Evaldo Serafim

    2013-06-01

    Full Text Available Cafeicultores da região fisiográfica do Alto São Francisco, MG, Brasil, vêm adotando novo sistema de cultivo, considerado conservacionista do solo, cujos efeitos na qualidade física do solo precisam ser avaliados. Este trabalho foi realizado com o objetivo de estudar a qualidade física de um Latossolo e um Cambissolo, localizados em áreas contíguas, sob cultivo comercial de café. A área localizada no topo da paisagem é recoberta por Cambissolo Háplico Tb distrófico latossólico; a outra, no terço médio, é recoberta por Latossolo Vermelho distrófico. Em cada área foram amostradas as profundidades de 0-0,05 e 0,75-0,80 m, nas posições linha e entrelinha do cafeeiro, totalizando quatro situações em cada solo. Para cada situação, foram coletadas 21 amostras com estrutura preservada destinadas à determinação do intervalo hídrico ótimo (IHO, que foram distribuídas em sete potenciais matriciais, com três repetições. Em todas as situações, o sistema de manejo conservacionista assegurou boa qualidade física, principalmente na linha da cultura, para as duas classes de solos estudadas, pois o IHO teve como limite superior e inferior a capacidade de campo e o ponto de murcha permanente, respectivamente. A boa qualidade física foi confirmada pelos valores de macro e microporosidade, volume total de poros, densidade do solo e resistência do solo à penetração e produtividades acima da média do Estado de Minas Gerais.

  16. Uso dos diptera na análise entomotoxicológica e na estimativa do intervalo pós-morte (IPM - doi: 10.5102/ucs.v13i1.2846

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    Diogo Barth Pacini

    2015-07-01

    Full Text Available A entomologia forense é o estudo de insetos que são encontrados em locais de crimes, e são utilizados como vestígios, aumentando a possibilidade de encontrar a causa da morte e a estimar o intervalo pós-morte (IPM. Com base nessas análises os entomólogos e os peritos observaram que os componentes químicos utilizados pelo individuo, tais como medicamentos ou drogas, ou até mesmo o uso de venenos alterava o que já se conhecia da estimativa do IPM, surgindo, desse modo uma nova vertente nesta ciência, que é a entomotoxicologia forense. O presente trabalho bibliográfico descreve os princípios básicos da entomotoxicologia abordando principalmente a interferência na estimativa do intervalo pós-morte.

  17. Interferência do intervalo de administração da droga sobre a nefrotoxicidade da gentamicina em ratos Influence of the dose regimen on the gentamicin nephrotoxicity in rats

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    Verônica Cunha Rodrigues Oliveira

    2001-06-01

    Full Text Available A insuficiência renal aguda (IRA que apresenta índice de mortalidade em torno de 50%, pode ser definida como um abrupto declínio da filtração glomerular, resultante de isquemia ou toxicidade. A nefrotoxicidade por drogas é uma das etiologias mais freqüentes (27% e sugere-se que o intervalo de administração da droga pode interferir neste efeito colateral, entretanto o melhor regime de administração ainda não está bem estabelecido. Este conhecimento proporcionaria uma atuação mais direcionada de enfermagem na prevenção desta IRA hospitalar. Os resultados obtidos nesta pesquisa, indicam que a infusão única de gentamicina determina menor nefrotoxicidade, provavelmente devido à redução da sua concentração plasmática nas 24hs, diminuindo o acúmulo intracelular deste fármaco, um dos principais mecanismos celulares deste tipo de lesão. Este regime de tratamento mostra portanto vantagens quanto ao custo, efeito nefrotóxico e segurança quanto à eficácia terapêutica.The acute renal failure (ARF, that still presents a righ mortality rate (50% can be defined as an abrupt decline of the glomerular filtration, resultant of isquemic or toxicity event. The drugs nephrotoxicity is one of the most frequent cause (27% of ARF and it is suggested that the interval of administration of the drug can interfere in this side effect, however the best administration regimen is not very well established. This study evaluated the renal function of rats that received gentamicin (100mg/kg in one dose or in two doses (2x 50mg/kg,by intraperitoneal infusion. The results obtained in this research, indicated that the single infusion of gentamicin determined smaller nephrotoxicity by the reduction of serum concentration of this drug in 24 hours, decreasing the intracelular accumulation of this gentamicin, which is one of the main cellular mechanisms of this renal injury. The single dose treatment regime, otherwise, showes advantages not only related

  18. Intervalo hídrico ótimo e compactação do solo com cultivo consorciado de milho e braquiária

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    Juliano Carlos Calonego

    2011-12-01

    Full Text Available O cultivo consorciado entre a espécie forrageira e a cultura produtora de grãos garante a produção de forragem no outono-inverno, além de palha para cobertura do solo em sistema semeadura direta. O aporte de matéria seca radicular no perfil do solo possibilita a melhoria da qualidade estrutural do solo. Objetivou-se com este experimento verificar as alterações nos atributos físicos e físico-hídricos do solo com o cultivo de milho solteiro e consorciado com Brachiaria brizantha. O experimento foi conduzido na Fazenda Experimental Lageado (UNESP, Botucatu-SP, entre os anos agrícolas de 2002/2003 e 2003/2004. Foram coletadas amostras com estrutura preservada de solo, por meio de anéis volumétricos, nas camadas de 0 a 20 e 20 a 40 cm de profundidade, em trincheiras abertas em parcelas cultivadas com milho e mantidas em pousio na entressafra, bem como em parcelas cultivadas com milho consorciado com B. brizantha na linha de semeadura, mantendo a forrageira para pastagem após a colheita do milho. A partir dessas amostras, foi avaliado o Intervalo Hídrico Ótimo (IHO, por meio de curvas de resistência à penetração e de retenção de água, em amostras com diferentes densidades do solo. O cultivo solteiro de milho na safra de verão é suficiente para melhorar as características físicas e estruturais do solo na camada de 0 a 20 cm. O cultivo de braquiária em consórcio com o milho por dois anos consecutivos melhora as condições físicas e estruturais do solo na camada de 20 a 40 cm, com redução da resistência mecânica à penetração e aumento da densidade crítica do solo.

  19. Intervalos de referência longitudinais de parâmetros doplervelocimétricos materno-fetais Longitudinal reference intervals of maternal-fetal Doppler parameters

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    Nelsilene Mota Carvalho Tavares

    2013-01-01

    Full Text Available OBJETIVO: Criar intervalos de referência longitudinais para os valores de índices de pulsatilidade (IP dos fluxos nas artérias umbilicais (AU, cerebral média (ACM e uterinas (AUt e IP venoso do fluxo no ducto venoso (DV com uma amostra da população brasileira. MÉTODOS: Estudo observacional longitudinal realizado de fevereiro de 2010 a maio de 2012. Gestantes de baixo risco foram submetidas a exames ultrassonográficos quinzenais da 18ª a 40ª semana para obtenção dos IP das AU, AUt, ACM e IP venoso do DV. Modelos lineares mistos foram usados para elaboração de intervalos de referência longitudinais (percentis 5, 50 e 95 dos IP dos vasos mencionados. Os IP das porções placentária e abdominal do cordão umbilical foram comparados por meio do teste t de amostras independentes. Valores de p bilaterais menores do que 0,05 foram considerados significativos. RESULTADOS: Cento e sessenta e quatro gestantes foram submetidas a 1.242 exames ultrassonográficos. Houve redução significativa nos valores de todos esses parâmetros com o avançar da IG. Entre a 18ª e a 40ª semana de gravidez, as medianas de IP da AU (porções abdominal e placentária do cordão, da ACM, do DV e do IP médio das AUt variaram de 1,19 a 0,74; 1,33 a 0,78; 1,56 a 1,39; 0,58 a 0,41; e 0,98 a 0,66, respectivamente. As equações obtidas para predição das medianas foram: IP-AU=1,5602786 - (0,020623 x IG; Logaritmo do IP-ACM=0,8149111 - (0,004168 x IG - [0,002543 x (IG - 28,7756²]; Logaritmo do IP-DV=-0,26691- (0,015414 x IG; IP-AUt=1,2362403 - (0,014392 x IG. Houve diferença significativa entre os IP-AU obtidos nas extremidades placentária e abdominal fetal (pPURPOSE: To create longitudinal reference intervals for pulsatility index (PI of the umbilical (UA, middle cerebral (MCA, uterine (UtA arteries and ductus venosus (DV in a Brazilian cohort. METHODS: A longitudinal observational study performed from February 2010 to May 2012. Low risk pregnancies were

  20. Aveia preta e azevém anual colhidos por interceptação de luz ou intervalo fixo de tempo em sistemas integrados de agricultura e pecuária no Estado de São Paulo

    OpenAIRE

    TONATO, F.; PEDREIRA, B. C. e; PEDREIRA, C. G. S.; PEQUENO, D. N. L.

    2014-01-01

    Objetivou-se caracterizar o potencial produtivo, a distribuição mensal, a composição morfológica e botânica da forragem de aveia preta e de azevém anual submetidos a estratégias de manejo de corte no estado de São Paulo. O delineamento experimental foi inteiramente casualizado, com tratamentos correspondendo a combinações entre formas de cultivo (aveia e azevém exclusivos ou combinados) e estratégias de colheita (cortes com 95% de interceptação de luz (IL) ou intervalo FIXO de 30 dias de rebr...

  1. Intervalo hídrico ótimo em um latossolo vermelho distroférrico sob diferentes sistemas de produção Least limiting water range in a distroferric red latossol under different growing systems

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    Milson E. Serafim

    2008-12-01

    Full Text Available Este trabalho teve o objetivo de caracterizar sistemas de cultivo quanto à qualidade estrutural do solo para o desenvolvimento de plantas por meio da determinação do Intervalo Hídrico Ótimo (IHO. O estudo foi realizado com amostras indeformadas de um Latossolo Vermelho distroférrico, sob os sistemas de cultivo convencional, direto e integração lavoura-pecuária, no município de Dourados - MS. Em cada sistema de cultivo, foram amostrados 28 pontos, nas camadas de 0-0,05 m, 0,05-0,10 m, e 0,10-0,20 m, totalizando 84 amostras por sistema, que foram utilizadas para a determinação da curva de retenção de água no solo, da curva de resistência do solo à penetração e da porosidade. No sistema de cultivo convencional e no direto, a menor limitação ao desenvolvimento radicular foi na camada de 0-0,05 m, e na integração, a limitação foi menor na camada de 0,10-0,20 m. Na camada de 0-0,05 m do convencional, o IHO foi igual à capacidade de água disponível. Nos sistemas direto e integração, a resistência à penetração foi limitante. A resistência à penetração foi o principal fator limitante do IHO na maioria das situações estudadas.The objective of this work was to characterize the growing systems related to the structural soil quality for plants development by the Least Limiting Water Range (LLWR. The study was developed using soil samples with preserved structure of a Distroferric Red Latossol under the conventional, no tillage and integrated growing systems in de county of Dourados-MS, Brazil. In each system 28 points were sampled, in 0-0.05, 0.05-0.10 and 0.10-0.20 m deep layers, ending up with 84 samples by system which was used to adjust the water retention curve in the soil, soil resistance to penetration curve and porosity determination, all of them necessary to the LLWR determination. In the conventional and no-tillage systems the smallest restriction to de roots development was in the 0-0.05 m layer, while in

  2. ARRITMIAS VENTRICULARES Y NUEVO SÍNDROME CORONARIO AGUDO EN PACIENTES CON INFARTO Y DISPERSIÓN DEL INTERVALO QT PROLONGADO / Ventricular arrhythmias and new acute coronary syndrome in patients with infarction and prolonged QT dispersion

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    Luis M. Reyes Hernández

    2013-01-01

    Full Text Available Resumen Introducción y objetivos: La isquemia miocárdica aumenta la dispersión del intervalo QT del electrocardiograma, ya que en estas circunstancias la duración del potencial de acción disminuye en la zona del insulto isquémico, al crear una dispersión de la repolarización. La rápida sucesión de alteraciones iónicas y metabólicas locales crea situaciones favorecedoras en la génesis de arritmias ventriculares durante la isquemia. El objetivo fue determinar la asociación de la dispersión del intervalo QT corregido prolongado, en el síndrome coronario agudo, con las arritmias ventriculares y la ocurrencia de un nuevo episodio agudo de enfermedad coronaria. Método: Se estudiaron 194 pacientes con infarto miocárdico agudo, a los cuales se les midió la duración del intervalo QT en un electrocardiograma de 12 derivaciones y se corrigió por la frecuencia cardíaca en cada una de esas derivaciones; asimismo se calculó la dispersión de dicho intervalo. Se tomó en cuenta la evolución electrocardiográfica de estos pacientes relacionada con la aparición de arritmias ventriculares y de un nuevo síndrome coronario agudo a los 30 días de seguimiento. Resultados: Entre los pacientes que presentaron una dispersión prolongada del intervalo QT, prevalecieron los fallecidos con fibrilación ventricular (7 casos para un 7,5 % y sólo 2 enfermos (2,2 %, que presentaron esta arritmia, egresaron vivos. Se observó un nuevo síndrome coronario agudo en 17 pacientes con dispersión del QT prolongado, contra 8 con dispersión del QT normal. Conclusiones: Las extrasístoles ventriculares constituyeron la arritmia más observada en los pacientes con dispersión del intervalo QT normal y la fibrilación ventricular, la más observada en los pacientes con dispersión del intervalo QT prolongado. La mayor cantidad de pacientes que presentaron un nuevo síndrome coronario agudo tenían un intervalo QT corregido prolongado. / Abstract Introduction

  3. Produtividade da biomassa de melissa em função de intervalo de cortes e doses de nitrogênio Biomass production of Lemon balm as a result of cutting interval and nitrogen levels

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    André May

    2008-09-01

    Full Text Available A espécie Melissa officinalis tem crescido em importância econômica no setor produtivo de plantas medicinais, contudo o nível de informações agronômicas a cerca da espécie é limitado. Dessa forma, foi instalado um experimento visando avaliar a influência do intervalo de cortes e de doses de nitrogênio sobre a produção de biomassa dessa espécie. O delineamento experimental utilizado foi o de blocos ao acaso, com três repetições, em esquema fatorial 4 x 4, sendo os fatores estudados o intervalo de cortes (30; 42; 54 e 66 dias e dose de nitrogênio (0; 60; 120 e 180 kg ha-1 de N. Foram avaliadas a altura da planta e massa seca da parte aérea. Observou-se maior altura da planta para maior intervalo entre corte. Maiores rendimentos de massa seca foram observados com a aplicação de 180 kg ha-1 de N, havendo uma resposta linear para a produção de massa seca com a aplicação de N.Cultivation of Melissa officinalis is increasing in economic importance in the market of medicinal plants, although the level of agronomic information concerning the specie is limited. To achieve those objectives, a trial was carried out to study the influence of cutting intervals and nitrogen levels in biomass production. The experimental design was in blocks with three replications in a 4 x 4 factorial cheme: cutting intervals (30; 42; 54 and 66 days and nitrogen (0; 60; 120 and 180 kg ha-1 of N. The characteristics of plant height and aerial part and accumulated dry mater were evaluated. Increasing the cutting intervals resulted in higher plants. The highest dry matter value was observed using 180 kg ha-1 of N, having a linear reply for the production of dry mass with the application of N.

  4. Intervals between observations for ingestive behavior evaluation of young bulls in feedlot/ Intervalo de tempo entre observações para avaliação do comportamento ingestivo de tourinhos em confinamento

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    Willian Gonçalves do Nascimento

    2008-08-01

    Full Text Available The objective of this experiment was to study the intervals of time for observing the ingestive behavior of 36 young crossbred bulls in feedlot. The animals were housed in individual stalls, in a completely randomized design, with three treatments (sorghum silage with 1.0 % concentrate, sugar cane with 1.0 % concentrate and sugar cane with 1.2 % concentrate. Five different intervals between observations were studied. The evaluated parameters were: feeding, rumination and idle, time and frequency, dry matter and neutral detergent fiber intake, total chewing time, feeding and rumination efficiency of dry matter and neutral detergent fiber, as well as, the percentage of the time in that the animals were laying during rumination or idle. The intervals of time did not differ (P > 0.05 for analyzed variable of the time and efficiency. The percentage of time in that the animals were laid while ruminating, was 91 %. The frequencies of feeding, rumination and idle, differed (P Objetivou-se com o experimento estudar intervalos de tempo para avaliação do comportamento ingestivo de tourinhos confinados. Foram utilizados 36 animais, alojados em baias individuais, em delineamento inteiramente casualizado, com três tratamentos (silagem de sorgo com 1,0 % de concentrado, cana-deaçúcar com 1,0 % de concentrado e com 1,2 % de concentrado. Foram comparadas cinco escalas de intervalos de observações. Avaliou-se o tempo e freqüência de alimentação, ruminação e ócio, sendo que destes dois últimos itens calculou-se a percentagem do tempo que os animais permaneciam deitados, ingestão de matéria seca e de fibra em detergente neutro, tempo de mastigação total e eficiência de alimentação e de ruminação da matéria seca e da fibra em detergente neutro. Não se observou diferença significativa (p > 0,05 entre as escalas de tempo analisadas para as variáveis relacionadas a tempo e eficiência. A percentagem de tempo que os animais permaneceram

  5. Taxas e intervalos de alimentação na produção de Tilápia em tanque-rede com dispensador automático de ração

    OpenAIRE

    Oliveira, Fernando Alcântara de [UNESP

    2007-01-01

    Nas diversas atividades agropecuárias o objetivo principal é alcançar o melhor desempenho, com baixo custo e menor tempo de produção. Com o avanço tecnológico na alimentação de peixes, novos equipamentos estão sendo desenvolvidos para acelerar a produção. O objetivo deste trabalho foi avaliar o manejo alimentar, utilizando dispensadores automáticos de ração, com diferentes taxas e intervalos de alimentação em alta freqüência para tilápias na fase de engorda. Foram instalados dezoito tanques-r...

  6. Influência do intervalo de tempo entre as sessões de alongamento no ganho de flexibilidade dos isquiotibiais Influence of the time interval between stretching sessions on increased hamstring flexibility

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    Zenewton André da Silva Gama

    2009-04-01

    Full Text Available CONTEXTO: A otimização do treino de flexibilidade está relacionada com o uso de parâmetros adequados de alongamento. Entretanto, o intervalo de tempo adequado entre as sessões de alongamento tem sido pouco investigado. OBJETIVO: Verificar se a variação no intervalo de tempo entre sessões de alongamento influencia no ganho de flexibilidade. MÉTODOS: 28 mulheres, com idade de 22,5 ± 1,8 anos, foram distribuídas aleatoriamente em três grupos. Aplicaram-se 10 sessões de alongamento nos isquiotibiais do membro direito. O grupo 0X (n = 8 foi o controle e não recebeu alongamento. O grupo 3X (n = 10 alongou três vezes por semana (intervalo de 48 horas e o grupo 5X (n = 10, cinco vezes (intervalo de 24 horas. Aplicaram-se 10 sessões de alongamento (sustentar-relaxar nos isquiotibiais direitos. As medidas foram tomadas por análise fotométrica no programa AutoCad® 2000. A análise estatística foi realizada com ANOVA e teste post hoc de Newman-Keuls adotando um p-valor referencial de 0,05. RESULTADOS: Após 10 sessões, identificou-se aumento da flexibilidade nos grupos experimentais, porém sem diferença entre estes. O grupo 3X aumentou significativamente a partir do 10º dia do programa (quinta sessão e o grupo 5X, a partir do terceiro (terceira sessão. CONCLUSÕES: O alongamento aumenta a flexibilidade dos isquiotibiais, independente do tempo entre as sessões (24 ou 48 horas; e a variável tempo não influencia o ganho de flexibilidade total. Porém, com cinco sessões semanais, ganha-se flexibilidade mais rapidamente. Isso sugere que o ganho de flexibilidade é sessão-dependente.CONTEXT: The optimization of flexibility training is related to the use of ideal stretching parameters. However, the time interval between sessions has been little investigated. OBJECTIVE: To verify if the variation in time interval between stretching sessions influences in flexibility gain. METHODOLOGY: Twenty-eight women, average age of 22.5 ± 1

  7. Interpretando correctamente en salud pública estimaciones puntuales, intervalos de confianza y contrastes de hipótesis Accurate interpretation of point estimates, confidence intervals, and hypothesis tests in public health

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    Manuel G Scotto

    2003-12-01

    Full Text Available El presente ensayo trata de aclarar algunos conceptos utilizados habitualmente en el campo de investigación de la salud pública, que en numerosas situaciones son interpretados de manera incorrecta. Entre ellos encontramos la estimación puntual, los intervalos de confianza, y los contrastes de hipótesis. Estableciendo un paralelismo entre estos tres conceptos, podemos observar cuáles son sus diferencias más importantes a la hora de ser interpretados, tanto desde el punto de vista del enfoque clásico como desde la óptica bayesiana.This essay reviews some statistical concepts frequently used in public health research that are commonly misinterpreted. These include point estimates, confidence intervals, and hypothesis tests. By comparing them using the classical and the Bayesian perspectives, their interpretation becomes clearer.

  8. Intervalos de integración unificados para la caracterización estructural de petróleos, carbones o sus fracciones por rmn 1h y rmn 13c

    OpenAIRE

    Eliseo, Avella; Fierro, Ricardo

    2010-01-01

    Con base en la revisión de publicaciones, hechas entre 1972 y 2006, se evidenció que hay imprecisiones en los límites de los intervalos de integración que los autores asignan a las señales en resonancia magnética nuclear (RMN) para hacer la caracterización estructural de petróleos, carbones o sus fracciones derivadas, a partir de sus espectros de hidrógeno (RMN 1H) o de carbono (RMN 13C). En consecuencia, se determinaron límites unificados para la integración de los espectros RMN 1H y RMN 13C...

  9. INTERVALO ÓTIMO DE POTENCIAL DA ÁGUA NO SOLO: UM CONCEITO PARA AVALIAÇÃO DA QUALIDADE FÍSICA DO SOLO E MANEJO DA ÁGUA NA AGRICULTURA IRRIGADA

    OpenAIRE

    Tormena,Cássio Antônio; Silva,Álvaro Pires da; Gonçalves,Antônio Carlos Andrade; Folegatti,Marcos Vinícius

    1999-01-01

    RESUMO O manejo de irrigação tem sido estabelecido considerando-se apenas o potencial da água no solo, como fator limitante para o crescimento das plantas. O conteúdo de água do solo entre a capacidade de campo e o ponto de murcha permanente, foi definido como água disponível para as plantas; entretanto, a resistência à penetração e a aeração do solo também podem limitar o crescimento de plantas, mesmo com o potencial da água no solo estando dentro do intervalo correspondente à água disponíve...

  10. Avaliação dos intervalos e números de observações no comportamento ingestivo de novilhas leiteiras confinadas Evaluation of the intervals and numbers of observations on the ingestive behavior of dairy heifers confined

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    Lucas Nascimento de Oliveira

    2011-06-01

    Full Text Available Objetivou-se verificar o efeito dos intervalos e números de observações no comportamento ingestivo de novilhas leiteiras confinadas. Foram utilizadas 20 novilhas mestiças Holandês x Zebu, com peso corporal médio inicial de 165,5kg e idade média de 13 meses. As novilhas foram distribuídas em quatro grupos, compostos por níveis de inclusão de farelo de cacau com base na matéria seca das dietas (0; 7; 14 e 21%. Os tratamentos do presente estudo foram os intervalos (cinco; 10; 15; 20 e 30 minutos, números de repetições (quatro, três, duas e uma, e turnos (quatro, três, dois e um de observação durante o comportamento ingestivo. A avaliação ocorreu no fim de cada período de 21 dias de coleta de dados, durante 24 horas, sendo as atividades registradas em cinco escalas diferentes: cinco; 10; 15; 20 e 30 minutos de intervalo. Os aspectos do comportamento ingestivo foram observados em quatro, três, duas e uma repetições e turnos. Não houve efeito significativo das escalas de registro sobre o tempo de alimentação, ruminação e ócio, nem sobre as eficiências de alimentação e ruminação. Para as variáveis relacionadas com a atividade de ruminação, não houve diferença entre os diferentes números de observações, nem para os diferentes turnos de observação. A determinação dos tempos totais das atividades de alimentação, ruminação e ócio, e as eficiências de alimentação e ruminação dos diferentes nutrientes podem ser realizadas com intervalo de observação de até 30 minutos.The objective of this study was to assess the effect of the intervals and numbers of observations on the ingestive behavior of confined dairy heifers. We used 20 heifers Holstein x Zebu, with initial body weight of 165.5kg and mean age of 13 months. The heifers were divided into four feeding groups, composed of inclusions of cocoa meal based diets (0; 7; 14 and 21%. The treatments were the intervals (five; 10; 15; 20 and 30 minutes

  11. Intervalos de observações com diferentes escalas de tempo no comportamento ingestivo de vacas leiteiras confinadas Intervals between observations at different time scales in the feeding behavior of dairy confined cows

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    Fabrício Bacelar Lima Mendes

    2011-09-01

    Full Text Available Objetivou-se analisar as diferentes escalas de tempo para determinar qual o intervalo mais adequado no estudo do comportamento ingestivo de vacas leiteiras confinadas. O experimento foi conduzido na fazenda Água Azul, Município de Macarani-Bahia, no período de outubro a novembro de 2005. Foram utilizadas 12 vacas mestiças Holandês, apresentando, em média, 478,5  15,89kg de peso corporal. Os tratamentos do presente estudo foram os intervalos (cinco, 10; 15; 20 e 30 minutos, observados durante o comportamento ingestivo. A observação do comportamento ocorreu no penúltimo dia de cada período de 12 dias durante 24 horas. Procedeu-se a análise de variância e a aplicação do teste de Dunnett, adotando-se 0,05 como nível crítico de probabilidade. Não houve efeito significativo das escalas de registro do tempo de alimentação, ruminação, ócio e para as eficiências de alimentação e ruminação. Para as variáveis dos números de períodos de alimentação, ruminação e ócio e os tempos por período de alimentação, ruminação e ócio, as escalas de 10, 15, 20 e 30 minutos foram diferentes quando comparadas com o intervalo de observação de cinco minutos. As coletas totais dos tempos de alimentação ruminação e ócio, e as eficiências de alimentação e ruminação nos diferentes nutrientes podem ser realizadas com intervalo de observação de até 30 minutos. Para a discretização das séries temporais do comportamento ingestivo recomenda-se a escala de cinco minutos entre as observações.This study aimed to analyze different time scales to determine the most appropriate interval in the study of ingestive behavior of confined dairy cows. The experiment was conducted at the farm Blue Water, city of Macarani-Bahia, in the period from October to November 2005. 12 crossbred Holstein cows were used, with an average body weight of 478.5  15.89kg. The treatments of this study were the intervals (five; 10; 15; 20 and 30

  12. Comparação quantitativa da comunidade de aves de um fragmento de floresta semidecidual do interior do Estado de São Paulo em intervalo de 30 anos

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    Vagner Cavarzere

    2012-12-01

    Full Text Available Poucos estudos avaliaram em longo prazo a variação no tamanho populacional das espécies de aves em fragmentos florestais. Para avaliar a riqueza e a abundância específica da comunidade de aves de um remanescente de mata semidecidual do interior do Estado de São Paulo, sudeste do Brasil, foi conduzido o censo da avifauna florestal utilizando-se a metodologia de contagem em transecção. Estes resultados foram comparados com levantamento realizado na mesma localidade 30 anos antes, e as aves foram classificadas de acordo com suas categorias alimentares com a finalidade de associá-las à tendência ao aumento/diminuição de suas abundâncias após este intervalo de tempo. Embora tenha havido predominância de espécies com diminuição populacional, todas as categorias tróficas analisadas apresentaram também espécies com aumento em suas abundâncias. A maioria das espécies com propensão a deslocarem-se entre fragmentos apresentou diminuição em suas abundâncias. Sugerimos que, em relação a suas abundâncias específicas, as categorias tróficas são igualmente afetadas pelos processos da fragmentação, e que a regeneração florestal sofrida pelo remanescente pode ter resultado na perda de espécies de bordas. Espécies cujas abundâncias tenham reduzido neste intervalo de tempo podem sofrer extinção local futuramente.

  13. Intoxicação de ovinos que receberam duas aplicações de closantel, na dosagem terapêutica (7,5mg/kg, com intervalo de 28 dias

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    Welber Daniel Zanetti Lopes

    2014-12-01

    Full Text Available O presente estudo notifica a intoxicação de ovinos que receberam duas aplicações de closantel, na dosagem terapêutica (7,5mg/kg, com intervalo de 28 dias pré-estabelecido pela eficácia da formulação. Referente aos resultados de eficácia foi possível observar elevado percentual após o primeiro e o segundo tratamento. Cerca de 72 horas após a administração do segundo tratamento (D+30, três animais que receberam closantel demonstraram leve apatia, anorexia, diarréia e cegueira bilateral com ausência de reflexo e midríase bilateral. Estes três ovinos foram observados por cerca de 250 dias após o segundo tratamento, e a cegueira bilateral não regrediu. Os inúmeros casos de animais intoxicados por closantel descritos na literatura enfatizam que a sobredosagem e/ou qualidade nutricional dos animais, são fatores determinantes para que ocorra intoxicação destes animais pelo closantel. Entretanto, no presente trabalho, os sinais de intoxicação (leve apatia, anorexia, diarréia e a alteração oftálmica observada nos três ovinos clinicamente sadios, ocorreram quando estes receberam duas aplicações de closantel (7,5mg/kg com o intervalo de 28 dias, evidenciando que o possível efeito residual cumulativo de closantel no organismo animal, desencadeado por duas aplicações consecutivas, também pode ser um fator predisponente para que ovinos demonstrem sinais irreversíveis de intoxicação pelo princípio ativo em questão.

  14. Cálcio ionizado no soro: estimativa do intervalo de referência e condições de coleta Serum ionized calcium: reference interval estimation and blood collection condictions

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    Adagmar Andriolo

    2004-04-01

    Full Text Available INTRODUÇÃO: A dosagem de cálcio ionizado, em nosso meio, tem se tornado freqüente em substituição à de cálcio total, com vantagens, por ser a fração fisiologicamente ativa e pelo desenvolvimento de metodologia robusta e com relação custo/benefício adequada. Seu uso implica a necessidade de definição de intervalos de referência. OBJETIVO: Estimar o intervalo de referência para o cálcio ionizado sérico e avaliar interferências do tempo de permanência do torniquete e do resfriamento da amostra. MATERIAL E MÉTODO: Para a estimativa do intervalo de referência, foram incluídos os resultados de 11.320 dosagens consecutivas de cálcio ionizado realizadas de janeiro de 2000 a novembro de 2002; para avaliar o efeito da refrigeração foram realizadas 16 coletas em duplicata, sendo que um dos tubos foi colocado em banho de gelo imediatamente após a coleta e o outro foi mantido à temperatura ambiente; para avaliar o efeito do tempo de garroteamento, em seis voluntários foi realizada a coleta em um dos braços imediatamente após a aplicação do torniquete e, no outro braço, após 3 minutos de garroteamento. O sangue foi colhido em tubos sem ar, contendo gel separador, e centrifugado em até 30 minutos após a coleta. Todas as dosagens foram realizadas em até 4 horas após a centrifugação por eletrodo íon-seletivo. RESULTADOS: Considerando-se os 95% centrais dos dados, os limites inferior e superior foram 1,11mmol/l (intervalo de confiança de 90%: 1,1 a 1,11mmol/l e 1,4mmol/l (intervalo de confiança de 90%: 1,39 a 1,41mmol/l, respectivamente. Não foram detectadas diferenças significativas nos resultados das amostras com e sem refrigeração e entre as amostras coletadas com menos de um minuto e com três minutos de garroteamento.INTRODUCTION: The ionized serum calcium determination has become frequent replacing the total calcium with advantages: it is the physiologically active fraction, and the availability of robust

  15. Determinação dos intervalos de referência para lipídeos e lipoproteínas em escolares de 10 a 19 anos de idade de Maracaí (SP

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    Seki Mario

    2003-01-01

    Full Text Available INTRODUÇÃO: Os estudos epidemiológicos do perfil lipídico em jovens fornecem subsídios para a prevenção da aterosclerose e a redução das elevadas taxas de mortalidade provocadas por doenças do aparelho circulatório. Observa-se, entretanto, que os autores nacionais utilizam intervalos de referência procedentes de outros países, geralmente os norte-americanos. As III Diretrizes Brasileiras Sobre Dislipidemias (III DBSD, 2001 também adotam este recurso, recomendando valores do National Cholesterol Education Program (NCEP (EUA, 1992. Esta prática, que desconsidera diferenças raciais, condições socioeconômicas, constituição física e hábitos alimentares da população brasileira, pode induzir potenciais vieses, prejudicando o dimensionamento das dislipidemias em nosso meio. OBJETIVO: Estabelecer intervalos de referência para triglicerídeos (TG, colesterol total (CT, LDL-colesterol (LDL-c, HDL-colesterol (HDL-c e não-HDL-colesterol (não-HDL-c em escolares de Maracaí (SP, de ambos sexos e faixa etária de 10 a 19 anos. MÉTODOS: Delineamento transversal. No período de 25 de março a 8 de outubro de 2002, foram avaliados 1.371 alunos de ambos os sexos, de 10 a 19 anos de idade, matriculados em oito escolas públicas e uma privada. Foram utilizadas reações enzimáticas para determinações de CT e TG, kits Johnson & Johnson (Ortho Clinical Diagnostics, metodologia de química seca e auto-analisador Vitros 750. A dosagem enzimática de HDL-c foi precedida pela precipitação de LDL-c e VLDL-c presentes nos soros mediante uso de reagentes responsivos à separação magnética, contendo sulfato de dextran e cloreto de magnésio (Johnson & Johnson. Valores de LDL-c para TG sérico abaixo de 400mg/dl foram obtidos pelo cálculo de Friedewald: LDL-c = CT - HDL-c - TG/5; para valores superiores a este, os soros foram precipitados com sulfato de polivinil dissolvido em polietilenoglicol a 25%, pH 6,7 e posterior determinação com

  16. Criteria to determine the depth of the production interval in wells of the Cerro Prieto geothermal field, Mexico; Criterios para determinar la profundidad del intervalo productor en pozos del campo geotermico de Cerro Prieto, Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Leon Vivar, Jesus Saul de [Comision Federal de Electricidad, Residencia General de Cerro Prieto, Mexicali, B.C. (Mexico)]. E-mail: jesus.deleon@cfe.gob.mx

    2006-07-15

    Ways to select the depth of the production interval or to complete wells in the Cerro Prieto geothermal field have changed during the development of the field. From 1961 when drilling began to the middle of 2005, a total of 325 wells were drilled. The paper compares the approaches used in the past with those of the last ten years. The Cerro Prieto system has been classified as being of liquid-dominated and high-temperature. Today, after 33 years of commercial exploitation, it has experienced a series of thermal and geochemical fluid changes making it necessary to modify the ways to select the depth of the well production intervals, according to the observed behavior of the reservoir. The new criteria include the thermal approach, the geological approach, the geochemical approach and a comparative approach with neighboring wells. If most of these criteria are interpreted correctly, the success of a well is ensured. [Spanish] Los criterios para seleccionar la profundidad del intervalo productor o la terminacion de los pozos en el campo geotermico de Cerro Prieto han cambiado durante el desarrollo del mismo. De 1961, cuando se perforaron los primeros pozos, hasta mediados del 2005 se han perforado un total de 325 pozos. En el presente articulo se hara una breve revision de cuales han sido los criterios usados en el pasado y los que se han venido empleando en los ultimos diez anos. El yacimiento de Cerro Prieto ha sido clasificado como de liquido dominante, de alta temperatura, pero actualmente, despues de 33 anos de explotacion comercial, ha sufrido una serie de cambios termicos y geoquimicos en sus fluidos, por lo que ha sido necesario modificar los criterios para seleccionar la profundidad del intervalo productor de los pozos de acuerdo al comportamiento observado en el yacimiento. Los criterios actuales se dividen en cuatro: 1. Criterio termico, 2. Criterio geologico, 3. Criterio geoquimico y 4. Criterio comparativo de los pozos vecinos. Cuando la mayoria de estos

  17. INTERVALO ÓTIMO DE POTENCIAL DA ÁGUA NO SOLO: UM CONCEITO PARA AVALIAÇÃO DA QUALIDADE FÍSICA DO SOLO E MANEJO DA ÁGUA NA AGRICULTURA IRRIGADA

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    Cássio Antônio Tormena

    1999-12-01

    Full Text Available RESUMO O manejo de irrigação tem sido estabelecido considerando-se apenas o potencial da água no solo, como fator limitante para o crescimento das plantas. O conteúdo de água do solo entre a capacidade de campo e o ponto de murcha permanente, foi definido como água disponível para as plantas; entretanto, a resistência à penetração e a aeração do solo também podem limitar o crescimento de plantas, mesmo com o potencial da água no solo estando dentro do intervalo correspondente à água disponível. O Intervalo Ótimo do Potencial da Água no Solo (IOP é um conceito que incorpora os potenciais da água do solo associados à água disponível e, também, os potenciais da água do solo, nos quais há uma limitação para o crescimento de plantas associada a resistência à penetração e à aeração do solo. O objetivo deste trabalho foi caracterizar o IOP em um Latossolo Roxo argiloso, em Guaíra, SP, irrigado com um sistema de pivô de central. O IOP foi determinado usando-se a curva de retenção de água e a curva de resistência do solo à penetração, as quais foram obtidas a partir de oitenta e oito amostras indeformadas. O IOP variou de 0 a 1,49 MPa e foi negativamente correlacionado à densidade do solo (Ds. Para Ds > 1,09 Mg m-3, a resistência à penetração foi o limite superior do IOP, enquanto a aeração do solo definiu o limite superior para Db > 1,28 Mg m-3. Os limites de potencial correspondentes à água disponível foram iguais ao IOP, mas somente para Db < 1,09 Mg m-3.

  18. Parâmetros citológicos e bioquímicos do líquido cefalorraquidiano coletado de bovinos sadios em dois momentos, com intervalo de 96 horas

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    P.H.J. Cunha

    Full Text Available RESUMO A análise do líquido cefalorraquidiano (LCR é uma importante ferramenta no diagnóstico das doenças neurológicas dos bovinos. A coleta do LCR em diferentes momentos facilita o monitoramento do quadro clínico e/ou a avaliação da eficácia de tratamentos estabelecidos. Todavia, os efeitos de coletas consecutivas sobre os parâmetros citológicos e bioquímicos do LCR de bovinos saudáveis ainda não foram analisados. Dessa forma, o objetivo do presente estudo foi avaliar potenciais diferenças citológicas e bioquímicas no LCR de bovinos sadios, obtidos em dois momentos, com intervalo de 96 horas. O LCR foi submetido à análise citológica e à determinação do teor de proteína total. Na segunda coleta, verificou-se aumento significativo da celularidade, porém ainda dentro do intervalo de referência para a espécie, diminuição de linfócitos e elevação de células mononucleares em relação à primeira coleta. No entanto, os números de hemácias (/µL, células nucleadas (/µL, neutrófilos (%, eosinófilos (% e a concentração da proteína total (mg/dL continuaram dentro dos valores de referência 96 horas após a realização da primeira punção. Conclui-se que os procedimentos de coleta de LCR consecutivos não provocaram inflamação local detectável 96 horas após a primeira punção, o que sugere que, quando necessário, coletas de LCR seriadas, por si só, não interfeririam nos resultados do exame.

  19. Influência do intervalo entre a colheita e a aplicação do 1-metilciclopropeno no controle do amadurecimento de mamão Influence of the interval between harvest and 1-methylcyclopropene application on papaya ripening

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    Angelo Pedro Jacomino

    2007-01-01

    Full Text Available Este trabalho teve como objetivo determinar a influência do intervalo entre a colheita e a aplicação do 1-MCP na sua eficiência como retardador do amadurecimento de mamões 'Golden'. Os frutos foram colhidos em pomares comerciais da região de Linhares-ES, no estádio 2 de maturação, armazenados a 11±1ºC e submetidos à aplicação de 1-MCP (100nL.L-1 após 0; 1; 2 e 3 dias da colheita. Frutos tratados e não-tratados permaneceram durante 6 dias a 11±1ºC e, em seguida, foram armazenados a 22±1,5ºC e 80-90%UR, até completo amadurecimento. O 1-MCP retardou a perda de firmeza e a mudança da cor da casca dos frutos. Os frutos sem 1-MCP atingiram firmeza ideal para consumo entre o 2º e o 4º dia a 22ºC. Os frutos que receberam 1-MCP no 2º ou no 3º dia após a colheita, atingiram ponto de consumo entre o 8º e o 10º dia a 22ºC. Aqueles tratados no 1º dia após a colheita atingiram firmeza de consumo no 12º dia a 22ºC, e aqueles que receberam 1-MCP no dia da colheita, não amoleceram. A coloração da casca teve comportamento similar ao da firmeza, porém em menor intensidade. Houve pequeno aumento no teor de sólidos solúveis dos frutos em função do amadurecimento. Quanto menor o intervalo entre a colheita e a aplicação do 1-MCP maior sua eficiência como retardador do amadurecimento de mamões 'Golden'. Essa informação é fundamental na definição da tecnologia de aplicação desse regulador vegetal.The purpose of this work was to determine the influence of the interval between harvest and 1-MCP application on 1-MCP efficiency in delaying ripening in Golden papaya. Fruits were harvested from commercial orchards located in Linhares, ES, in a second stage of maturation, stored at 11±1ºC and treated with 1-MCP (100 nL.L-1 0, 1, 2 and 3 days after harvest. Treated and non-treated fruits were kept at 11±1ºC for 6 days and, then, were stored at 22±1.5ºC and 80-90%RH until complete ripening. 1-MCP delayed loss of

  20. Os efeitos da metformina sobre a dispersão do intervalo QT e QTc de ratos diabéticos Effects of metformin on QT and QTc interval dispersion of diabetic rats

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    Eunice Cristina da Silva Costa

    2008-04-01

    Full Text Available FUNDAMENTO: Diversos fármacos podem causar aumento do intervalo QT, bem como da sua dispersão (QTd em registros eletrocardiográficos (ECG. O QTd pode ser um marcador potencialmente sensível ao aumento do risco de arritmias cardíacas e morte súbita cardíaca. Metformina é uma substância de eficácia anti-hiperglicêmica utilizada no tratamento do diabete. Entretanto, estudos têm relacionado efeitos dose-dependentes da metformina sobre a glicemia e marcadores de riscos cardiovasculares. OBJETIVO: Avaliar os efeitos dose-resposta da metformina sobre o QT e QTd de ratos diabéticos. MÉTODOS: Ratos Wistar machos foram distribuídos em cinco grupos: controle não-tratado (C, diabético não-tratado (D, diabéticos tratados com metformina nas doses 3,5, 30 e 74 µg/kg/pc (DM 3,5, DM 30 e DM 74. O diabete foi induzido por uma injeção de aloxana (40 mg/kg, i.v.. O ECG foi registrado (1º, 15º e 30º dias através de quatro eletrodos inseridos na camada subcutânea das patas. Ambos os intervalos, RR e QT, foram medidos, e então os valores do QT corrigido e da dispersão de QT foram calculados. RESULTADOS: Os grupos DM 3,5 e DM 30 mostraram significativa redução da glicemia (pBACKGROUND: Several drugs can cause prolonged QT interval, as well as prolonged QT dispersion (QTd in electrocardiographic (EKG recordings. QTd may be a potentially sensitive marker of increased risk of cardiac arrhythmias and sudden cardiac death. Metformin is an effective antihyperglycemic agent used in the treatment of diabetes. However, studies have correlated dose-dependent effects of metformin on glycemia and cardiovascular risk markers. OBJECTIVE: To evaluate the dose-response effects of metformin on QT and QTd of diabetic rats. METHODS: Male Wistar rats were distributed in five groups: non-treated control (C, non-treated diabetics (D, diabetics treated with metmorfin at the doses of 3.5, 30 and 74 µg/kg/bw (DM 3.5, DM 30 and DM 74. Diabetes was induced by an

  1. Influência do intervalo entre cortes sobre a produção de biomassa de duas espécies de capim limão Influence of the interval between cuts on biomass yield of two lemon grass species

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    André May

    2008-09-01

    Full Text Available Foi estudada a influência do intervalo entre cortes na produção de massa seca da parte aérea de duas espécies de capim limão. O experimento foi realizado no Instituto Agronômico, em Campinas-SP, 04 de junho/05 a 28 de agosto/06. O delineamento experimental utilizado foi em blocos ao acaso, com três repetições, com os tratamentos em esquema fatorial 2 x 4, sendo duas espécies (C. citratus e C. flexuosus e quatro intervalos entre cortes (40; 60; 80 e 100 dias. Para C. flexuosus, maiores intervalos entre cortes proporcionaram maior massa seca acumulada ao longo do ciclo de cultivo, partindo de 329,04 para 704,16 g planta-1 de massa seca acumulada da parte aérea, para intervalos entre cortes de 40 e 100 dias, respectivamente. A espécie C. citratus apresentou resposta linear decrescente da massa seca acumulada da parte aérea quanto maior o intervalo entre cortes utilizado, produzindo 238,68 g planta-1 utilizando intervalo entre cortes de 40 dias.The aim of this study was to analyze the influence of the interval between cuts on the dry mass yield of the aerial part of two lemon grass species. The experiment was conducted at Agronomical Institute (IAC, in Campinas - SP, from June 4th, 2005 through August 28th, 2006. The experiment was carried out in a completely randomized block design, with three replications, and the treatments in a 2 x 4 factorial design, corresponding two species (C. citratus and C. flexuosus and four intervals between cuts (40; 60; 80 and 100 days. For C. flexuosus, longer intervals between cuts generated more dry mass accumulated throughout the cultivation cycle, beginning on 329,04 to 704,16 g plant-1 of accumulated dry mass of the aerial part, for intervals between cuts of 40 and 100 days, respectively. The C. citratus species showed a decrease in its linear response for the accumulated dry mass of the aerial part the longer the interval between cuts was, yielding 238,68 g plant-1 for a 40 day interval between

  2. Aveia preta e azevém anual colhidos por interceptação de luz ou intervalo fixo de tempo em sistemas integrados de agricultura e pecuária no Estado de São Paulo

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    Felipe Tonato

    2014-01-01

    Full Text Available Objetivou-se caracterizar o potencial produtivo, a distribuição mensal, a composição morfológica e botânica da forragem de aveia preta e de azevém anual submetidos a estratégias de manejo de corte no estado de São Paulo. O delineamento experimental foi inteiramente casualizado, com tratamentos correspondendo a combinações entre formas de cultivo (aveia e azevém exclusivos ou combinados e estratégias de colheita (cortes com 95% de interceptação de luz (IL ou intervalo FIXO de 30 dias de rebrotação, em arranjo fatorial com três repetições. Os estandes colhidos por IL acumularam 1580kg MS ha-1 corte-1, e os por FIXO 2020kg de MS ha-1 corte-1. A proporção de folhas foi maior no azevém (70%, seguido do cultivo combinado (64% e depois pela aveia (52%. Entre os manejos, a IL resultou em maiores proporções de folha e menor proporção de colmos que o FIXO. A proporção de azevém foi de 64%, sob o manejo por IL, e 70% no manejo por descanso FIXO. Ao longo do tempo, ocorreu a substituição da aveia pelo azevém na composição do dossel combinado. Ambas as estratégias de manejo podem ser adotadas para essas forrageiras de inverno em sistemas de integração agricultura e pecuária, com vantagem para o azevém.

  3. Productive fluid intervals in wells H-35 and H-39, Los Humeros geothermal field, Puebla (Mexico); Intervalos productores de fluidos en los pozos H-35 y H-39 del campo geotermico Los Humeros, Puebla, Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Medina Martinez, Moises [Comision Federal de Electridad, Perote, Veracruz (Mexico)

    2000-12-01

    This paper presents the results of log interpretations using the percentage method to define the productive fluid intervals in wells H-35 and H-39. These were identified with pressure, temperature and flow rate (PTS) electronic logs, used for the first time in this field. The test were carried out with the well integrated to the electrical generation units. Well H-35 fed steam to Units 1, 4, 5 and 7 through a plate with a restriction orifice diameter of 50.8 mm (2 inches), a well head pressure of 45 bars and a mass flow rate of 40 t/h. Well H-39 fed steam to Unit 3 through plate with a restriction orifice diameter of 50.8 mm (2 inches), a well head pressure of 27 bars and a mass flow rate of 30 t/h. [Spanish] Se presenta la intervencion realizada por el metodo de porcentajes para definir los intervalos productores de fluidos en los pozos H-35 y H-39. El estudio se hizo a partir de datos obtenidos con una sonda electronica de presion, temperatura y velocidad de flujo (PTS), utilizada por primera vez en este campo. En ambos casos se realizaron las pruebas con el pozo integrado a las unidades de generacion electrica, el primero suministra vapor para las Unidades 1, 4, 5 y 7 a traves de una placa de orificio de restriccion de 50.8 mm (2 pulgadas) de diametro, con presion de cabezal de 45 bar manometricos y un gasto de mezcla de 40 t/h. El segundo alimenta a la Unidad 3, fluye por orificio de 50.8 mm (2 pulgadas) de diametro y produce 30 t/h de mezcla con una presion en la cabeza de 27 bar.

  4. Teoría de la incertidumbre aplicada al valor del cliente en situaciones contractuales con intervalos de confianza = The Uncertainty Theory assignment in the Customer Lifetime Valuation (CLV for contractual settings with security intervals

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    Merigó, José M.

    2007-01-01

    Full Text Available El valor del consumidor ha sido un concepto muy estudiado desde hace tiempo por investigadores en las áreas de marketing. La mayoría de estas investigaciones están basadas en supuestos deterministas o aleatorios, al medir magnitudes o eventos que intervienen en el cálculo del valor del cliente. En muchas ocasiones, los modelos del valor del consumidor en los que se involucran magnitudes que hacen referencia al futuro, por el entorno regido por su mutabilidad y por la incertidumbre, resultan excesivamente precisos para poder reflejar la realidad. Kaufmann y Gil Aluja (1986, que son dos de los precursores e investigadores más notables en Europa en las técnicas operativas de gestión, sostenían que “lo impreciso, lo borroso, no tiene por qué ser inexacto”. Podemos trabajar con modelos en los que tradicionalmente se utilizan cifras precisas pero no son necesariamente exactos. En la investigación que nos ocupa, proponemos las aportaciones necesarias para utilizar cifras inciertas, borrosas, pero más adecuadas a la realidad. Vamos a presentar, para ello, dos modelos del valor del cliente (CLV con la herramienta menos estructurada de la teoría de la incertidumbre: los intervalos de confianza, con la finalidad de ayudar a trabajar magnitudes inciertas involucradas en el cálculo del CLV. = The Customer Lifetime Value (CLV concept has been highly purposed in many researches in the marketing area since long time ago. Almost all of them tend to be based on determinist or stochastic assumptions when measuring magnitudes or events which have to do with CLV estimates. Often, the Customer Lifetime Valuation (CLV involves magnitudes that link to the future by the running environment, its mutability and uncertainty, and this turn out the results to be too accurate. Kaufman and Gil Aluja (1986, who are the two most well known European investigators, have carried out researches into several operative management techniques, stood by the following

  5. Avaliação do efeito da cintilação ionosférica e de diferentes intervalos de tempo de coleta de dados no posicionamento por ponto preciso na sua forma on-line

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    Rodrigo Santos Mendes da Rocha

    2017-06-01

    Full Text Available O PPP é um método de posicionamento por GNSS que utiliza efemérides precisas, correções dos relógios dos satélites e possíveis modelagens de erros. As possibilidades de aplicações do PPP têm aumentado nos últimos anos, especialmente devido aos serviços on-line, destacando-se entre estes IBGE-PPP, GAPS, APPS e RT_PPP. Esses serviços têm sido utilizados em várias pesquisas e aplicações, porém são poucos os experimentos que consideram ocorrência de cintilação ionosférica. Portanto, no estudo realizado foram selecionados dados de duas estações da RBMC em regiões de alta e baixa atividade ionosférica. Utilizou-se dados de duas épocas do ano, com fraca e forte influência da cintilação ionosfera, buscando-se avaliar o desempenho dos serviços de PPP ­on-line em diferentes intervalos de tempo de coleta de dados GNSS e sob a influência da cintilação ionosférica no posicionamento PPP utilizando o software RT_PPP. Com os dados disponíveis o IBGE-PPP obteve melhores resultados que os demais softwares e o aumento de tempo de coleta de dados melhorou a acurácia do posicionamento. A estação na região sob menor cintilação ionosférica no período de maior atividade ionosférica alcançou resultados mais acurados, entretanto, não se pôde concluir que o motivo foi a cintilação ionosférica.

  6. Efeitos de diferentes intervalos de recuperação no desempenho muscular isocinético em idosos Effects of different rest intervals on isokinetic muscle performance among older adults

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    C Ernesto

    2009-02-01

    Full Text Available OBJETIVO: Comparar os efeitos de diferentes intervalos de recuperação (IR entre séries de contração isocinética no desempenho muscular em idosos. MÉTODOS: Vinte idosos voluntários (66,9±3,9 anos, 76,1±13,4kg, 169±5,2cm foram submetidos a três sessões de exercício resistido isocinético unilateral da musculatura extensora do joelho com diferentes IR (1 minuto, 2 minutos, e 3 minutos na velocidade de 60°•s-1. Cada sessão consistia em três séries de 10 repetições durante as quais foram avaliados o pico de torque (PT, trabalho total (TT e índice de fadiga (IF. ANOVA fatorial para medidas repetidas, com a análise de Post hoc por Bonferroni, foi utilizada para identificar possíveis diferenças entre os IR. O nível de significância estatístico utilizado foi de p0,05. Apesar de ter sido observado menor desempenho muscular na 3ª série em todos os IR, maiores quedas no PT, TT e IF foram observadas quando adotado o IR de 1minuto (pOBJECTIVE: To compare the effects of different rest intervals (RI between sets of isokinetic contractions on muscle performance in older adults. METHODS: Twenty older participants (66.9±3.9 years; 76.1±13.4kg; 169±5.2cm underwent three sessions of unilateral isokinetic training for the knee extensor muscles, with different RI (1 minute, 2 minutes and 3 minutes at an angular velocity of 60°•s-1. Each session consisted of three sets of 10 repetitions, during which the peak torque (PT, total work (TW and fatigue index (FI were evaluated. Factorial ANOVA for repeated measurements, with Bonferroni post-hoc analysis, was used to identify possible differences between the RI. The statistical significance level was set at p0.05. Although muscle performance was lower during the third sets with all RI, the greatest decreases in PT, TW and FI occurred with the 1 minute RI (p<0.05. CONCLUSIONS: The results showed that the RI variable has an important influence on isokinetic muscle performance in older

  7. Resistance exercise-induced microinjuries do not depend on 1or 3 minutes rest time interval between series. (Las microlesiones inducidas por el entrenamiento con cargas no dependen de los intervalos de descanso entre series de 1 o 3 minutos.

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    Rafael Pereira

    2008-10-01

    Full Text Available AbstractIn order to examine the effects of different rest intervals between sets on the muscle fiber integrity, 14 male subjects volunteered to participate in randomized crossover design methodology. All subjects completed 2 experimental training sessions. Both sessions consisted of 3 sets of 10 repetitions with 10 repetition maximum resistance bench press, cable pulldowns, military press, biceps curl, triceps curl, leg press, leg extension, and lying leg curls. The 2 experimental sessions differed only in the length of the rest period between sets and exercises: 1 session with a 1-minute and the other with a 3-minute rest period. the mechanical stress caused by the proposed training session cause similar damage in the muscle fibers do not depend of the 1 or 3 minutes of rest interval between series. ResumenEl propósito de ese estudio fue comparar los efectos de 2 diferentes períodos de descanso durante una sesión de entrenamiento con cargas en la integridad de la fibra muscular. Participaron de forma voluntaria 14 hombres en un estudio con diseño cruzado aleatorio. Todos los sujetos realizaron 2 sesiones de entrenamiento con cargas. Durante cada sesión, los sujetos completaban 3 series de 10 repeticiones máximas de press de banca, jalón en polea alta para dorsal, press militar, curl de bíceps con barra, extensión de tríceps trasnuca con mancuerna, prensa de piernas en máquina, extensión de rodillas en máquina, y flexión de rodillas en máquina. Las 2 sesiones experimentales diferían sólo en la longitud del período de descanso entre las series y los ejercicios: una sesión con 1 minuto y la otra con 3 minutos en los períodos de descanso. La tensión mecánica causada por las sesiones puede causar daños similares en las fibras musculares y no dependen de hacer 1 o 3 minutos de intervalo de descanso entre las series.

  8. Efeito de diferentes intervalos de recuperação entre as séries sobre o desempenho muscular no exercício leg-press em idosas não treinadas

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    José Claudio Jambassi Filho

    2012-08-01

    Full Text Available OBJETIVO: Verificar a influência de dois diferentes intervalos de recuperação (IR entre as séries no exercício leg-press sobre o número e sustentabilidade das repetições e no volume total, em idosas não treinadas. MÉTODOS: Onze idosas (66,5 ± 5,0 anos; 59,2 ± 9,1kg; 146,4 ± 34,9cm foram submetidas a duas sessões experimentais de exercícios com pesos com intensidade de 15 repetições máximas. Cada sessão experimental foi composta por três séries realizadas até a fadiga muscular utilizando IR de um (IR-1 ou três minutos (IR-3. As sessões experimentais foram separadas por, no mínimo, 48 horas. Todas as participantes realizaram ambos os protocolos e um delineamento cross-over balanceado foi utilizado para determinar a ordem das sessões experimentais. RESULTADOS: Para ambos os IR entre as séries, reduções significativas (P < 0,05 no número e na sustentabilidade das repetições foram observadas da primeira para a segunda e terceira séries e da segunda para a terceira séries. Diferenças significativas (P < 0,05 entre os IR foram observadas nas duas séries finais. O volume total da sessão realizada com IR-3 foi estatisticamente superior (20,4%; P < 0,05 quando comparada a sessão IR-1. CONCLUSÃO: O número e a sustentabilidade das repetições e o volume total de treino de idosas não treinadas são influenciados pelo IR empregado entre as séries. Maiores IR devem ser utilizados quando a finalidade for otimizar o volume de treino por meio da sustentabilidade das repetições. Em contrapartida, menores IR devem ser utilizados quando a meta for obter maiores níveis de fadiga muscular.

  9. Composição química e atividade antimicrobiana in vitro do óleo essencial de Eucalyptus cinerea F. Mull. ex Benth., Myrtaceae, extraído em diferentes intervalos de tempo

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    J. Franco

    Full Text Available Eucalyptus cinerea é uma espécie aromática da família Myrtaceae, sendo utilizada como ornamental e que apresenta rendimento em óleo essencial considerável. O objetivo deste trabalho foi à avaliação da composição química e da atividade antimicrobiana deste óleo, e das frações coletadas em diferentes intervalos de tempo. A metodologia empregada para a extração do óleo essencial foi a hidrodestilação com arraste de vapor d'água, em aparelho de Clevenger. A análise da composição química foi procedida por CG/EM e para a determinação da atividade antimicrobiana foi utilizado o método de difusão em ágar frente aos microrganismos Staphylococcus aureus ATCC 6.538, Escherichia coli ATCC 8.739, Staphylococcus epidermidis ATCC 12.228 e Pseudomonas aeruginosa ATCC 9.027 e Candida albicans ATCC 10.231. O rendimento do óleo essencial foi de 6,07 % (v/m, do qual grande parte foi extraída na primeira hora de hidrodestilação. Também foi observada maior concentração de 1,8-cineol nas frações coletadas em quinze minutos e uma hora. Os principais componentes identificados no óleo essencial de E. cinerea por CG/EM foram: 1,8-cineol, a-pineno, limoneno e a-terpineol. A avaliação de atividade antimicrobiana pelo método de difusão em disco indicou qualitativamente o potencial antimicrobiano do óleo essencial da espécie em questão frente a bactérias Gram-positivas, bactérias Gram-negativas e levedura.

  10. Perfil de progesterona e intervalo ao estro de receptoras bovinas sincronizadas com doses reduzidas de cloprostenol Profile of progesterone and interval to estrus in bovine embryo recipients synchronized with reduced cloprostenol doses

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    Marilú Martins Gioso

    2005-08-01

    Full Text Available Objetivou-se comparar os efeitos da aplicação de diferentes doses de cloprostenol sódico (doses equivalentes a 50% da convencional, nas vias intramuscular (IM ou intra-vulvosubmucosa (IVSM, sobre as taxas de sincronização, o intervalo da aplicação ao estro e a queda das concentrações séricas de progesterona (P4. Foram utilizadas 199 femêas - 103 fêmeas com histórico de estro e 96 sem histórico (apenas avaliadas pela palpação transretal, para se verificar presença de corpo lúteo característico - divididas ao acaso em três tratamentos: 1 - 68 animais (38 com histórico de estro receberam 1mL de cloprostenol via IVSM; 2 - 66 animais (33 com histórico de estro receberam 1 mL via IM; 3 - 65 animais (32 com histórico de estro receberam 2 mL via IM. Foram considerados os animais em estro até 96 horas após a aplicação. As concentrações séricas de progesterona foram analisadas por RIA às 0 e 48 horas após a administração do luteolítico. Não houve diferença entre os tratamentos nas taxas de sincronização (72,1; 53,0 e 64,6% respectivamente, nos intervalos da aplicação ao estro (69,3 ± 15,2; 67,9 ± 16,7; 68,3 ± 16,9 horas, respectivamente e na queda percentual de P4 (79; 68 e 83%, respectivamente. Porém, quando os dados dos animais pertencentes aos dias 11 a 16 do ciclo estral foram agrupados e comparados com os animais dos dias 7 a 10 do ciclo, as taxas de sincronização foram diferentes (76,1 vs 55,5%. Concluiu-se que o cloprostenol sódico administrado em doses reduzidas em 50%, nas vias IM ou IVSM, apresentou efeito semelhante à dose convencional. Animais em fases medianas e tardias do diestro (dias 11 a 16 do ciclo estral respondem melhor à sincronização com cloprostenol que animais em fase luteal inicial (dias 7 a 10 do ciclo.The objective of this research was to compare the effects of different doses of application of sodic cloprostenol (doses equivalent to 50% the conventional, in the intramuscular

  11. Least limiting water range and physical quality of soil under groundcover management systems in citrus Intervalo hídrico ótimo e qualidade física do solo em sistemas de manejo nas entrelinhas de citros

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    Jonez Fidalski

    2010-08-01

    Full Text Available Machinery-based farming operations used for perennial fruit crops often damage soils, particularly if the soil is wet and prone to compaction. We hypothesized that perennial vegetation growing in the interrows of orange orchards can mitigate the soil physical degradation from machinery traffic. The objective of this study was to investigate the effects of different groundcover management systems on the soil physical quality indicators including the least limiting water range (LLWR. An experiment was started in 1993 in a Typic Paleudult to evaluate three groundcover management systems: Bahia grass (Paspalum notatum with mowing, perennial peanut (Arachis pintoi, and natural regrowth in which weeds were controlled by herbicide. The experimental design was randomized complete block with three replications. In May 2003, 216 undisturbed soil samples were collected at 0-0.15-m depths under and between wheel tracks in the orchard interrows. The soil bulk density, soil organic carbon content, resistance to penetration, soil water retention curve and soil resistance to penetration curve were determined in order to estimate the LLWR. The higher LLWR under wheel tracks in Bahia grass compared to perennial peanut or natural regrowth suggest that a better soil physical quality was achieved with Bahia grass.Operações motomecanizadas utilizadas no manejo das entrelinhas dos pomares de frutas com freqüência causam a degradação física do solo, especialmente quando realizadas com o solo úmido e suscetível à compactação. A hipótese desse estudo é que a manutenção da vegetação permanente nas entrelinhas do pomar pode mitigar a degradação física do solo causada pelo tráfego de máquinas. O objetivo desse estudo é verificar o efeito de diferentes sistemas de manejo da cobertura permanente das entrelinhas sobre o intervalo hídrico ótimo (IHO e a qualidade física do solo. Um experimento foi iniciado em 1993 num Argissolo Vermelho distr

  12. Idade ao primeiro parto e intervalo de partos de cinco grupos genéticos Holandês x Gir no Brasil Age at first calving and calving interval of five Holstein x Gir genetic groups in Brazil

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    Olivardo Facó

    2005-12-01

    Full Text Available Tendo em vista a grande importância dos bovinos mestiços Holandês x Gir (H x G nos sistemas de produção de leite no Brasil e a íntima relação entre a reprodução e a produtividade destes sistemas, foram obtidos registros de partos e datas de nascimento junto à Associação Brasileira dos Criadores de Girolando, no intuito de avaliar o desempenho reprodutivo de vários grupos genéticos HxG. Os dados, num total de 2.600 registros de idade ao primeiro parto (IPP e 3.763 de intervalos de partos (IDP, foram analisados por meio do procedimento GLM do pacote estatístico SAS (1999. As comparações do desempenho dos grupos genéticos foram feitas por meio de modelos classificatórios incluindo o efeito de grupo genético. Foram feitas estimativas dos efeitos genéticos, isto é, da diferença aditiva entre Holandês e Gir, do efeito de dominância e do efeito epistático aditivo x aditivo, utilizando-se modelos de regressão. O grupo meio-sangue apresentou desempenho superior, ou seja, menores IPP e IDP. Foi observada tendência de elevação do IDP com o aumento da proporção de genes da raça Holandesa. O efeito de dominância influenciou significativamente as duas características estudadas, enquanto o efeito de interação epistática do tipo aditivo x aditivo influenciou significativamente apenas a IPP. Os resultados indicaram que a perda de interações epistáticas favoráveis contribuiu para a alta IPP no grupo 5/8 Holandês.Reproduction efficiency of Holstein x Gir crossbred animals in Brazilian dairy farms were evaluated using data provided by the Brazilian Association of Girolando. A total of 2,600 records of age at first calving (IPP and 3,763 records of calving intervals (IDP were analyzed using the SAS® GLM procedure. Estimates of genetics effects: additive difference between Holstein and Gir breeds, dominance and additive x additive epistatic effects were obtained by regression models including genetic groups to model the

  13. O efeito do intervalo da estimulação elétrica no músculo desnervado de rato The effect of time interval between electrical stimulation on the denervated rat muscle

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    QM Caierão

    2008-04-01

    Full Text Available OBJETIVO: Comparar o efeito da estimulação elétrica (EE aplicada diariamente e em dias alternados na densidade de área do tecido conjuntivo (TC e na área de secção transversa (AST das fibras do músculo desnervado. MATERIAIS E MÉTODOS: Trinta e cinco ratos foram divididos em grupos controle (C, desnervado (D, desnervado + eletroestimulado diariamente (EED e desnervado + eletroestimulado em dias alternados (EEA. A aplicação da EE no músculo gastrocnêmio teve início 24 horas após lesão nervosa do tipo axoniotmese, sendo a mesma aplicada durante 20 e 30 dias. Cortes transversais foram corados com HE para mensurações da AST e densidade de área de TC. Análise estatística: teste Shapiro Wilk, seguido pela análise de variância (ANOVA F (one-way e teste de Tukey (5%. RESULTADOS: Na análise da densidade de área do TC, observou-se que somente o Grupo EED apresentou valores similares ao Grupo C nos dois períodos analisados. No Grupo 20 dias, não houve diferença na AST quando comparados os grupos submetidos à EE com o Grupo D (p> 0,05, e após 30 dias todos os grupos experimentais alcançaram valores similares ao Grupo C. CONCLUSÕES: A EE não foi eficiente para minimizar a atrofia das fibras musculares. Entretanto, o TC foi responsivo à EE, sendo a aplicação diária mais benéfica ao músculo do que a aplicação em dias alternados, sugerindo que o intervalo de aplicação da EE em músculo desnervado é variável importante para as adaptações do TC.OBJECTIVE: To compare the effect of electrical stimulation (ES applied daily and on alternate days, on the area density of the connective tissue (CT and on the cross-sectional area (CSA of the denervated muscle fibers. METHODS: Thirty-five rats were divided into the following groups: control (C, denervated (D, denervated + daily electrical stimulation (D+DES and denervated + alternate-day electrical stimulation (D+ES. The application of ES on the gastrocnemius was started 24

  14. Actualización de los límites críticos del intervalo hídrico óptimo Review of the critical limits of the optimal hydric interval

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    Miguel Angel PIlatti

    2012-07-01

    Full Text Available El Intervalo Hídrico Óptimo (IHO es la fracción de agua edáfica fácilmente utilizable por los cultivos, durante la cual el suelo puede ser penetrado por las raíces sin mayor resistencia y la aeración no limita la respiración radical. En este trabajo se discuten los límites superior e inferior del IHO. El primero es èCC -agua retenida en capacidad de campo- si garantiza una aceptable capacidad de aire (èa; de lo contrario, el límite se alcanza cuando èa no restringe la respiración radical. El límite inferior queda determinado por la variable de mayor valor entre èRP (contenido hídrico edáfico por debajo del cual las raíces restringen su crecimiento, y èFU (agua fácilmente utilizable por debajo del cual comienza el estrés hídrico. Se analiza y discute la validez de los límites, y las dificultades metodológicas que implican sus determinaciones. Se comparan valores del IHO obtenidos por otros autores, que utilizaron diferentes límites, con los calculados con los límites críticos aquí propuestos. Cada situación agronómica (combinación de suelos, clima, cultivo requiere valores particulares de IHO que deberán ser determinados para cada región. Para el norte de la Región Pampeana (Argentina y sus cultivos habituales proponemos los siguientes valores críticos: èCC = contenido hídrico a -10 kPa; èa = 15%; èRP = 2,5 a 6 MPa (según el porcentaje de arcilla y èFU = -0,17 MPa.The Optimal Hydric Interval (IHO is the interval of easily available soil water for the crops, during which soil resistance and aeration do not limit root growth. In this paper, the upper and lower limits of the IHO are discussed. The upper limit is èCC (soil water content at field capacity when air capacity (èa is not restrictive for root respiration; otherwise, the limit is èa. The lower limit is determined by the variable of greater value between èRP (soil water content at which soil resistance reduces root elongation and èFU (soil water

  15. ESTUDO PILOTO: O USO DO INTERVALO DE DECANSO DE 2 MINUTOS ENTRE AS SÉRIES NO EXERCÍCIO DE SUPINO HORIZONTAL (SMITH) INDUZ A REDUÇÃO DO NÚMERO DE REPETIÇÕES MÁXIMAS E A VELOCIDADE DE MOVIMENTO

    OpenAIRE

    MACIEL, V.S.; MANHÃES, F.S.; SILVA NETO, E.A.; PESSANHA, N.F.S.B.; RIBEIRO, R.M.; MORALES, A.P.1

    2015-01-01

    O número de repetições executadas no treinamento de força com base no percentual de 1-RM (1 Repetição Máxima) ou nas 10-RMs (10 Repetições Máximas) tem sido discutido em vários trabalhos, uma vez que fatores tais como o tamanho do grupamento muscular envolvido e membro utilizado, podem influenciar na capacidade de executar RMs em um determinado exercício. Outro fator que pode afetar o número de RMs executadas a partir de um percentual de 1-RM ou 10-RMs é o intervalo empregado entr...

  16. Temporal variation of the phytoplankton community at short sampling intervals in the Mundaú reservoir, Northeastern Brazil Variação temporal da comunidade fitoplanctônica em curtos intervalos amostrais no reservatório de Mundaú, Nordeste brasileiro

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    Ênio Wocyli Dantas

    2008-12-01

    Full Text Available The aim of this study was to determine how abiotic factors drive the phytoplankton community in a water supply reservoir within short sampling intervals. Samples were collected at the subsurface (0.1 m and bottom of limnetic (8 m and littoral (2 m zones in both the dry and rainy seasons. The following abiotic variables were analyzed: water temperature, dissolved oxygen, electrical conductivity, total dissolved solids, turbidity, pH, total nitrogen, nitrite, nitrate, total phosphorus, total dissolved phosphorus and orthophosphate. Phytoplankton biomass was determined from biovolume values. The role abiotic variables play in the dynamics of phytoplankton species was determined by means of Canonical Correspondence Analysis. Algae biomass ranged from 1.17×10(4 to 9.21×10(4 µg.L-1; cyanobacteria had biomass values ranging from 1.07×10(4 to 8.21×10(4 µg.L-1. High availability of phosphorous, nitrogen limitation, alkaline pH and thermal stability all favored cyanobacteria blooms, particularly during the dry season. Temperature, pH, total phosphorous and turbidity were key factors in characterizing the phytoplankton community between sampling times and stations. Of the species studied, Cylindrospermopsis raciborskii populations were dominant in the phytoplankton in both the dry and rainy seasons. We conclude that the phytoplankton was strongly influenced by abiotic variables, particularly in relation to seasonal distribution patterns.O objetivo deste estudo foi detectar a influência dos fatores abióticos sobre a comunidade fitoplanctônica em um reservatório de abastecimento, em curtos intervalos amostrais. As amostras foram coletadas na subsuperfície (0,1 m e fundo das regiões pelágica (8 m e litorânea (2 m, durante dois períodos sazonais, estações seca e chuvosa. As variáveis abióticas analisadas foram: temperatura da água, oxigênio dissolvido, condutividade elétrica, sólidos totais dissolvidos, turbidez, pH, nitrogênio total

  17. Características Demográficas e Intervalo para Atendimento em Mulheres Vítimas de Violência Sexual Demographic Characteristics and the Interval between Occurrence and the Search for Attendance by Women Victims of Sexual Abuse

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    Rosires Pereira Andrade

    2001-10-01

    Full Text Available Objetivos: analisar as características sociodemográficas das mulheres vítimas de violência sexual, avaliar a experiência sexual prévia, pesquisar a utilização de métodos anticoncepcionais por ocasião da violência e observar o período de tempo desde a agressão até o atendimento hospitalar. Métodos: foram analisados os dados de 117 fichas pré-codificadas, de um total de 134 atendimentos. As fichas foram utilizadas no atendimento de mulheres vítimas de violência sexual na Maternidade do Hospital de Clínicas de Curitiba no período de agosto de 1998 até junho de 2000. Resultados: a idade das mulheres variou de 5 a 49 anos, sendo que a metade era de jovens, com até 19 anos. A maioria tinha segundo grau completo ou incompleto, 41 (41,0% eram estudantes e 82 (82,0% eram solteiras. Na análise da experiência sexual prévia, constatou-se que cerca de um terço (32,4% era virgem. Das mulheres que referiam ter vida sexual prévia, 35 (47,9% usavam algum método anticoncepcional quando da agressão. Houve variação de 2 horas a 2 meses em relação ao tempo decorrido desde a violência sexual até a procura por atendimento. Conclusões: o número de mulheres vítimas de violência sexual evidencia a importância de um atendimento especializado a estas pacientes. Há também necessidade de este atendimento ser multidisciplinar, já que dentre as vítimas existem grupos que necessitam de atenção diferenciada, como por exemplo as crianças. O intervalo entre a violência sexual e a procura do serviço pode ser considerado como indício de que a população deve ter acesso a mais informações em relação à prevenção de gravidez e doenças sexualmente transmissíveis, inclusive a infecção pelo HIV.Purpose: to investigate the social and demographic characteristics of women victims of sexual abuse; to evaluate their sexual experience before the abuse; to investigate the use of contraceptive methods at the time of the violence, and

  18. Asociación de la neuropatía autonómica cardiovascular y el intervalo QT prolongado con la morbimortalidad cardiovascular en pacientes con diabetes mellitus tipo 2 Association of cardiovascular autonomic neuropathy and prolonged QT interval with cardiovascular morbidity and mortality in patients with type 2 diabetes mellitus

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    Ray Ticse Aguirre

    2011-03-01

    Full Text Available Con el objetivo de evaluar la relación entre la neuropatía autonómica cardiovascular (NACV y el intervalo QT corregido (QTc con la morbimortalidad cardiovascular en pacientes con diabetes mellitus tipo 2, se realizó el seguimiento a 5 años de 67 pacientes que acudieron a consulta externa del Servicio de Endocrinología. Se presentaron eventos cardiovasculares en 16 pacientes; el 82% completó el seguimiento y se encontró que el intervalo QTc prolongado fue la única variable que se asoció de forma significativa a morbimortalidad cardiovascular en el análisis de regresión logística múltiple (RR: 13,56; IC 95%: 2,01-91,36 (p=0,0074.In order to evaluate the relationship between cardiovascular autonomic neuropathy and corrected QT interval (QTc with cardiovascular morbidity and mortality in patients with type 2 diabetes mellitus, we followed up for 5 years 67 patients attending the outpatient Endocrinology Service. 82% completed follow-up and cardiovascular events occurred in 16 patients. We found that long QTc interval was the only variable significantly associated with cardiovascular morbidity and mortality in the multiple logistic regression analysis (RR: 13.56, 95% CI: 2.01-91.36 (p = 0.0074.

  19. Elaboração e validação de intervalos de referência longitudinais de peso fetal com uma amostra da população brasileira Elaboration and validation of longitudinal reference intervals of fetal weight with a sample of the Brazilian population

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    Érica Luciana de Paula Furlan

    2012-10-01

    Full Text Available OBJETIVOS: Elaborar modelos de predição de peso fetal e de percentis longitudinais de peso fetal estimado (PFE com uma amostra da população brasileira. MÉTODOS: Estudo observacional prospectivo. Dois grupos de gestantes foram recrutados: Grupo EPF (estimativa de peso fetal: pacientes para elaboração (EPF-El e validação (EPF-Val de um modelo de predição de peso fetal; Grupo IRL (intervalos de referência longitudinais: gestantes para elaboração (IRL-El e validação (IRL-Val de intervalos de referência longitudinais de PFE. Regressão polinomial foi utilizada com os dados do subgrupo EPF-El para gerar o modelo de predição de peso fetal. O desempenho deste modelo foi comparado com os de outros disponíveis na literatura. Modelos lineares mistos foram usados para elaboração de intervalos longitudinais de PFE com os dados do subgrupo IRL-El. Os dados do subgrupo IRL-Val foram usados para validação destes intervalos. RESULTADOS: Quatrocentos e cinqüenta e oito pacientes compuseram o Grupo EPF (EPF-El: 367; EPF-Val: 91 e 315 o Grupo IRL (IRL-El: 265; IRL-Val: 50. A fórmula para cálculo do PFE foi: PFE=-8,277+2,146xDBPxCAxCF-2,449xCFxDBP². Os desempenhos de outras fórmulas para estimativa de peso fetal em nossa amostra foram significativamente piores do que os do modelo gerado neste estudo. Equações para predição de percentis condicionais de PFE foram derivadas das avaliações longitudinais do subgrupo IRL-El e validadas com os dados do subgrupo IRL-Val. CONCLUSÕES: descrevemos um método para adaptação de intervalos de referência longitudinais de PFE, sendo este obtido por meio de fórmulas geradas em uma amostra da população brasileira.PURPOSES: To elaborate models for the estimation of fetal weight and longitudinal reference intervals of estimated fetal weight (EFW using a sample of the Brazilian population. METHODS: Prospective observational study. Two groups of patients were evaluated: Group EFW (estimation of

  20. Effects of different sampling intervals on apparent protein and energy digestibility of common feed ingredients by juvenile oscar fish (Astronotus ocellatus=Diferentes intervalos de coleta na determinação da digestibilidade aparente da proteína e da energia de ingredientes comuns para o apaiari (Astronotus ocellatus

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    João Batista Kochenborger Fernandes

    2012-04-01

    Full Text Available This study evaluated the apparent protein and energy digestibility of common feed ingredients (soybean meal, fish meal, wheat meal and corn by juvenile oscars using two different sampling intervals (30 min. and 12h. The 160 juvenile oscar fish tested (22.37 ± 3.06 g BW were divided into four cylindrical plastic net cages, each one placed in a 1000 L feeding tank. The experiment was completely randomized in a 2 x 4 factorial design (2 feces collection intervals and 4 feed ingredients with four replications. The statistical tests did not detect an interaction effect of sampling interval and type of ingredient on digestibility coefficients. Sampling interval did not affect protein and energy digestibility. The physical characteristics of juvenile oscar feces likely make them less susceptible to nutrient loss by leaching and can therefore be collected at longer intervals. Protein digestibility of the different ingredients was similar, showing that apparent digestibility of both animal and plant ingredients by juvenile oscars was efficient. Energy digestibility coefficients of fish meal and soybean meal were higher than those of wheat meal and corn. Carbohydrate-rich ingredients (wheat meal and corn had the worst energy digestibility coefficients and are therefore not used efficiently by juvenile oscars.O presente estudo avaliou a digestibilidade aparente da proteína e da energia de ingredientes (farelo de soja, farinha de peixe, farelo de trigo e milho por juvenis de apaiari (Astronotus ocellatus usando dois diferentes intervalos de coleta (30 min. e 12h. Os 160 juvenis de apaiari utilizados (22,37 ± 3,06 g de peso corporal foram divididos em quatro tanques rede plásticos e cilíndricos, cada um colocado em um tanque de alimentação de 1.000 L. O experimento foi inteiramente casualizado em esquema fatorial 2 x 4 (2 intervalos de coleta de fezes e 4 ingredientes foram com quatro repetições. Os testes estatísticos não detectaram efeito da

  1. Características morfogênicas e estruturais do capim-marandu submetido a combinações de alturas e intervalos de corte Morphogenetic and structural characteristics of marandu palisadegrass subjected to combinations of cutting heights and cutting intervals

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    Gelson dos Santos Difante

    2011-05-01

    Full Text Available Desenvolveu-se este estudo com o objetivo de avaliar o acúmulo de forragem e as características morfogênicas e estruturais do capim-marandu submetido a combinações de alturas e intervalos de corte. O experimento foi realizado no período de agosto de 2003 a abril de 2004. Os tratamentos corresponderam a combinações entre duas alturas (15 e 30 cm e três intervalos de corte (tempo correspondente para o aparecimento de três, quatro e cinco folhas por perfilho e foram alocados às unidades experimentais em arranjo fatorial 2 × 3 e delineamento de blocos completos casualizados com três repetições. Foram avaliados o acúmulo total de forragem, o acúmulo de lâminas foliares, colmos e material morto, as variáveis morfogênicas e as estruturais, assim como a altura do dossel no pré-corte e a duração do período de rebrotação. O corte a 15 cm resultou em menor período de rebrotação, altura pré-corte, alongamento de colmo e tamanho final da folha e maior densidade populacional de perfilhos em comparação ao corte a 30 cm. O intervalo de corte correspondente ao aparecimento de cinco folhas por perfilho resultou em maiores alturas pré-corte, taxas de alongamento de folhas, tamanho final das folhas e acúmulo de colmos e em menor densidade populacional de perfilhos em comparação aos intervalos correspondentes a três e quatro folhas surgidas por perfilho. A maior eficiência de utilização dos pastos de capim-marandu foi alcançada com cortes a 15 cm. Pastos manejados com intervalo de corte correspondente a três folhas surgidas por perfilho, independentemente da altura de corte avaliada, acumulam elevada quantidade de folhas, componente altamente desejável para alimentação animal.The objective of this study was to evaluate forage accumulation and morphogenetic and structural characteristics of marandu palisadegrass subjected to combinations of cutting heights and cutting intervals. The experiment was carried out from August

  2. Determinações e relações dos parâmetros anaeróbios do RAST, do limiar anaeróbio e da resposta lactacidemica obtida no início, no intervalo e ao final de uma partida oficial de handebol

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    Roseguini,Alex Zelanti; Silva,Adelino Sanchez Ramos da; Gobatto,Claudio Alexandre

    2008-01-01

    O principal objetivo do presente estudo foi determinar os parâmetros anaeróbios obtidos através do RAST (Running-based Anaerobic Sprint Test) e o limiar anaeróbio de 12 atletas filiados a Federação Paulista de Handebol. Além disso, também procuramos verificar as correlações entre as variáveis do RAST, o limiar anaeróbio e a resposta lactacidemica obtida no início, no intervalo e ao final de uma partida oficial de handebol. As avaliações foram conduzidas em 2 dias. No primeiro dia, os atletas ...

  3. Intervalo e intensidade de desfolhação nas taxas de crescimento, senescência e desfolhação e no equilíbrio de gramíneas em associação Interval and intensity of defoliation on the growth, senescence and defoliation fluxes and equilibrium of associated grasses

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    Andréa Machado Groff

    2002-09-01

    Full Text Available O experimento foi realizado no INRA (Institut National de la Recherche Agronomique em Theix, França. Duas gramíneas (azevém perene e festucaforam semeadas em caixas (0,13 m² e submetidas a três intervalos (3,5, 7 e 14 dias e três intensidades (160, 320 e 640 bocados.m-2 a cada desfolhação de desfolhação, com quatro repetições por tratamento. Quatro meses após a semeadura, a cada data de desfolhação, as caixas foram oferecidas, individualmente, a quatro ovelhas secas e retiradas após a realização de um determinado número de bocados. Para cada gramínea foram estudadas as taxas de crescimento, senescência e desfolhação. Os resultados mostraram que o intervalo e a intensidade de desfolhação tiveram efeitos diferenciados nas taxas de crescimento, senescência e desfolhação e no equilíbrio da associação.The experiment was carried in INRA (Institut National de la Recherche Agronomique at Theix, France. Two grasses (perennial ryegrass and tall fescue were grown in sward boxes (0,13 m² and submitted to three defoliation intervals (3,5, 7 and 14 days between two successive defoliation and three defoliation intensities (160, 320 and 640 bites.m-2 at each defoliation. Four months after sowing, at defoliation date, sward boxes were offered to four individual dry ewes and removed after a given number of bites had been taken. For each grass species, the growth, senescence and defoliation fluxes were studied. The results showed that the interval and the intensity of grazing had distinct effects on the growth, senescence and defoliation fluxes as well as on the equilibrium of grass mixtures.

  4. Intervalo hídrico ótimo no perfil explorado pelas raízes de feijoeiro em um latossolo sob diferentes níveis de compactação Least limiting water range in an oxisol profile penetrated by common bean roots under different compaction levels

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    Douglas Rodrigo Kaiser

    2009-08-01

    Full Text Available O intervalo hídrico ótimo (IHO é integrador dos fatores de crescimento das plantas, e a densidade crítica obtida é um indicativo da qualidade estrutural do solo. O objetivo deste trabalho foi determinar o IHO em um Latossolo argiloso. Amostras de solo com estrutura preservada foram coletadas num experimento com três níveis de compactação: PD - plantio direto continuado por seis anos, PDc - plantio direto com compactação adicional e Esc - escarificação. Para a curva de resistência, coletaram-se 107 amostras na camada de 0 a 0,20 m em diferentes condições de umidade. Para a curva de retenção de água, coletaram-se amostras nas camadas de 0 a 0,05; 0,05 a 0,10; 0,10 a 0,15; 0,20 a 0,25; e 0,30 a 0,35 m. O modelo de resistência à penetração ajustado, com base na densidade e umidade, explicou 33 % da variação obtida na resistência do solo à penetração, sendo todos os parâmetros de ajuste significativos. A densidade crítica do IHO é dependente do valor de resistência à penetração considerado limitante, sendo de 1,36; 1,40; 1,45; e 1,49 Mg m-3 para valores de RP de 1,5; 2,0; 2,5; e 3,0 MPa, respectivamente. A aeração do solo passa a ser limitante com densidades acima de 1,32 Mg m-3. A compactação do solo reduziu o seu IHO na camada próxima a 0,10 m de profundidade. Quando se adotou a resistência crítica de 2 MPa, o IHO foi nulo nas camadas de 0,05 a 0,12 m no PD, de 0,05 a 0,17 m no Esc e de 0,03 a 0,22 m no PDc. Com a utilização de 3 MPa como resistência crítica, ocorreu ampliação, em que o IHO tem valor positivo, no perfil do solo; o IHO foi nulo apenas na camada de 0,05 a 0,15 m do PDc. As raízes do feijoeiro não cresceram na camada de solo onde o IHO foi nulo com resistência crítica de 3 MPa.The least limiting water range (LLWR integrates the plant growth factors and the critical bulk density is an indicator of the soil structural quality. The objective of this study was to determine the LLWR of a

  5. Efeitos do local de deposição do sêmen e do intervalo inseminação/ ovulação sobre a fertilidade de éguas inseminadas com sêmen fresco diluído Effects of semen deposition site and the insemination/ovulation interval on fertility of mares inseminated with fresh diluted semen

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    Ivis Luiz Gomes de Sena Xavier

    2010-03-01

    Full Text Available Estudou-se o efeito do intervalo da inseminação artificial à ovulação sobre a fertilidade de éguas, considerando principalmente o local de deposição do sêmen. Os intervalos foram de 48 horas e 24 horas antes da ovulação e de 48 horas e 72 horas entre as duas últimas inseminações. As inseminações foram realizadas no ápice do corno uterino, por via intravaginal profunda, com 1/5 da dose inseminante utilizada para o corpo do útero (15 mL-GI. As éguas foram rufiadas diariamente e inseminadas às segundas, quartas e sextas-feiras, a partir de um folículo de 3,0 a 3,5 cm de diâmetro, com sêmen fresco diluído em diluidor de leite desnatado-glicose. Não houve diferença nas taxas de concepção/ciclo entre as inseminações realizadas no corpo (42,86% e no ápice (45,95% com concentrações médias de 489 e 102 milhões de espermatozoides móveis. Não foram observadas diferenças entre os grupos experimentais no mesmo intervalo inseminação artificial/ovulação, no entanto, quando as taxas de concepção foram comparadas entre intervalos em mesmo local de deposição do sêmen, taxas de concepção inferiores estiveram relacionadas às inseminações realizadas antes da ovulação. Por outro lado, as inseminações realizadas antes e após a ovulação, independentemente dos intervalos inseminação/ovulação, resultaram em melhores taxas de concepção. As concentrações espermáticas/dose inseminante podem ser significativamente reduzidas, sem prejuízo à fertilidade, quando o sêmen é depositado próximo à papila tubárica. Entretanto, há necessidade de inseminações antes e depois da ovulação para que se obtenham melhores taxas de fertilidade quando se utiliza sêmen de baixa viabilidade no trato genital da égua, visando ao estabelecimento de um reservatório espermático adequado no momento da ovulação.The effect of the interval from artificial insemination to ovulation on mare fertility rates was studied

  6. Efeitos de esmolol, lidocaína e fentanil nos intervalos dispersão da onda P, QT, QTc e respostas hemodinâmicas à intubação endotraqueal durante indução com propofol: um estudo comparativo

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    Volkan Hancı

    2013-06-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Investigar o efeito de esmolol, lidocaína e fentanil na dispersão da onda P (DP, durações dos intervalos QT e QT corrigido (QTc e as respostas hemodinâmicas à intubação endotraqueal durante a indução com propofol. MÉTODOS: Foram incluídos 80 pacientes adultos, estado físico ASA I ou II, idade entre 18 e 60 anos, neste estudo prospectivo, randômico e duplo-cego. Todos os pacientes foram submetidos a exame eletrocardiográfico (ECG antes da indução da anestesia. Os pacientes foram randomicamente alocados em quatro grupos iguais. O grupo controle (Grupo C recebeu 5 mL de solução salina; o grupo esmolol (Grupo E recebeu 0,5 mg.kg-1 de esmolol; o grupo fentanil (Grupo F recebeu 2 µg.kg-1 de fentanil e o grupo lidocaína (Grupo L recebeu 1,5 mg.kg-1 de lidocaína antes da indução anestésica. A anestesia foi induzida com propofol. ECG foi feito em todos os pacientes durante o primeiro e o terceiro minutos de indução, 3 minutos após a administração de relaxante muscular e 5 e 10 minutos após intubação. A DP e intervalos QT foram medidos em todos os ECGs. Os intervalos QTc foram determinados com o uso da fórmula de Bazett. Frequência cardíaca (FC e pressão arterial média (PAM foram registradas antes e depois da indução anestésica, imediatamente após a intubação e em 1, 3, 5, 7 e 10 minutos após a intubação. RESULTADOS: Após a intubação, a FC aumentou significativamente nos Grupos C, L e F em comparação com o grupo controle. Porém, não houve diferença significativa nos valores da FC após a intubação entre os grupos E e controle. Nos Grupos C e L, a PAM aumentou significativamente após a intubação em comparação com o grupo controle. No entanto, nos Grupos L, F e E não houve diferença significativa entre os valores da PAM após a intubação em comparação com o grupo controle. A DP foi significativamente mais longa no Grupo C após a intubação em comparação com o

  7. Intervalo para o alojamento e níveis de lisina, em dietas baseadas no conceito de proteína ideal, sobre o desenvolvimento muscular e rendimento de carcaça de frangos de corte Delayed placement and dietary lysine levels, on diets based in the ideal protein concept, on muscular development and carcass yield of broiler chickens

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    José Rodrigo Galli Franco

    2012-09-01

    Full Text Available Este trabalho objetivou estudar os efeitos do intervalo para o alojamento (IA e de níveis de lisina digestível (LD nas dietas iniciais sobre o desenvolvimento do músculo do peito e rendimento de carcaça de frangos de corte. Para tanto, 1.760 pintos de corte, machos, Cobb500, foram distribuídos aleatoriamente em oito grupos experimentais em arranjo fatorial 2x4 de 4 IAs (12, 24, 36 e 48h e dois níveis de LD (1,143 e 1,267%, com quatro repetições e 55 aves por unidade experimental. Met+Cys, Thr e Trp foram balanceados no conceito de proteína ideal. Não houve interação significativa entre LD e IA sobre as variáveis avaliadas. Os maiores pesos do peito desossado e filé de peito aos 21 dias de idade e peso corporal aos 43 dias foram obtidos no nível de 1,143% de LD. O peso do peito desossado, peso do filé, diâmetro das fibras musculares aos 21 dias, peso vivo, peso da carcaça e peso das pernas aos 43 dias de idade decresceram linearmente de acordo com o aumento no intervalo para alojamento. Os resultados deste estudo sugerem que o nível de 1,143% de LD favorece aumento no músculo peitoral aos 21dias e o peso vivo dos frangos aos 43 dias, e que o menor intervalo para o alojamento melhora o desenvolvimento dos músculos peitorais durante a fase inicial, e maior rendimento da carcaça inteira e das pernas no abate.This study aimed to study the effects of delayed placement (IA and dietary lysine levels (LD in initial diets on breast muscle development and carcass yield of broiler chickens. For this, 1,760 male Cobb500 chicks were allocated randomly to eight experimental groups according to a 2x4 factorial arrangement for 4 IAs (12, 24, 36 and 48h and 2 levels of LD (1.143 and 1.267% with four replicates and 55 chicks per experimental unit. Met+Cys, Thr and Trp were balanced according to the ideal protein concept. There were no significant interactions between LD and IA on variables evaluated. The highest breast weight and breast

  8. Efeito do intervalo das duas últimas inseminações sobre a fertilidade de éguas inseminadas com sêmen fresco diluído Effect of interval between the two last artificial inseminations on mares fertility inseminated with diluted fresh semen

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    Helton Mattana Saturnino

    2002-06-01

    Full Text Available Sessenta e duas fêmeas eqüinas foram distribuídas ao acaso em dois grupos experimentais de acordo com o intervalo da penúltima à última inseminação artificial de cada ciclo (48h ou 72h. As éguas foram rufiadas e inseminadas às segundas, quartas e sextas-feiras, a partir do momento em que apresentavam um folículo de 3,0 a 3,5 cm de diâmetro, com sêmen de apenas um garanhão de fertilidade comprovada, diluído para um volume inseminante de 10 mL com diluidor de mínima contaminação. As taxas de concepção referentes ao primeiro ciclo, para os intervalos de 48h e 72h foram de 66,67% (24/36 e 65,22% (15/23, respectivamente, sendo as taxas de concepção/ciclo de 53,45% (31/58 e 56,76% (21/37, na mesma ordem anterior. Com base nos resultados obtidos, recomendam-se inseminações às segundas, quartas e sextas-feiras, sem perda da fertilidade.Sixty two mares were randomly assigned to two experimental group, according to two intervals between the penultimate and the ultimate artificial insemination (48 or 72h. The mares were teased and inseminated on monday, wednesday and friday, when a follicle size was equal or greater than 3.0 cm in diameter, with semen from a stallion of proven fertility diluted with minimum contamination extender. The conception rates for the first cycle for the 48h and 72h intervals were 66.67% (24/36 and 65.22% (15/23 respectively, and the conception/cicle were 53.45% (31/58 and 56.76% (21/37, in the same order. Based on these results, one should consider recommending inseminations on monday, wednesday and friday, without fertility loss.

  9. Ritmo circadiano e doença vascular encefálica: um estudo de correlação com fatores de risco Circadian rhythm and encephalic vascular disease: a correlative study with risk factors

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    Helio Araújo Oliveira

    2004-06-01

    Full Text Available Os mecanismos biológicos humanos exibem variabilidade clínica previsível no tempo, o que tem permitido reavaliação das práticas médicas atuais, do estudo mais aprofundado do ritmo circadiano (RC e dos mecanismos que geram as oscilações sustentadas em todos os níveis biológicos. Fizemos um estudo procurando relacionar o RC e o momento do aparecimento do quadro clínico neurológico decorrente da lesão vascular do encéfalo com os fatores de risco modificáveis identificados no momento da internação. Foram estudados 53 pacientes, sendo 50,94% (n =27 do sexo feminino e 49,50%(n =26 do masculino, com média de idade de 66,4 anos. Quatro intervalos de 6 horas (0-6; 6-12; 12-18; 18-24 foram usados para análise da freqüência do ictus e da incidência em cada intervalo. Os resultados mostraram 6 (11,32% pacientes no intervalo 0-6 hs; 21 (39,62% no intervalo 6-12 hs; 10 (18,86% no intervalo 12-18 hs; 16 (30,18% no intervalo 18-24 hs. Estudo de correlação com os fatores de risco, baseado nos dados clínicos no momento da internação, mostrou que a hipertensão arterial [(81,25%] e o tabagismo[ (56,25%] predominaram no intervalo 18-24 hs, enquanto o sedentarismo[11; (52,38%] o estresse[11 (52,38%] o diabetes [(47,61%] a hiperlipidemia [8 (38,09%] e o alcoolismo[8 (38,09%] predominaram no intervalo 6-12 hs; as cardiopatias [(50,00%] predominaram no intervalo de 12-18 hs.The human biological mechanisms show a predictable clinical variability in time, which has allowed a deeper reevaluation of present-day medical practices, regarding the circadian rhythm (CR and the mechanisms that produce the supported variations in all biological levels. We have made a study aiming to relate the CR and onset of the neurological clinic situation due to the encephalic vascular lesion, correlating with modifying risk factors. Fifty three patients were studied, 50,94% female (n=27 and 49,50% male (n=26, at average age 66.4 years old. Four intervals of six

  10. Iconologia dos intervalos, limiares cartográficos

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    Daniel Melo Ribeiro

    2017-07-01

    Full Text Available Este artigo resgata a relevância do pensamento de Aby Warburg para a compreensão das imagens no campo da comunicação. São discutidos os conceitos de “pós-vida” (nachleben e de “fórmula de pathos” (pathosformel, centrais na constituição da “iconologia dos intervalos” desse pensador alemão. Partindo das conexões abertas por Warburg em seu Atlas Mnemosyne, esta investigação procura se aprofundar nas aplicações dessa metodologia para o estudo de mapas. Levantamos a hipótese de que a distorção da linguagem cartográfica nos abre a possibilidade de potencializar as funções heurísticas dos mapas, despertando um saber imaginativo sobre a heterogeneidade do espaço. Para demonstrar esses dois conceitos, será analisada uma obra de arte chamada “A Longa Marcha” do artista Qin Ga, que explora a linguagem cartográfica no contexto das artes contemporâneas. As discussões serão amparadas por autores como Agamben e Didi-Huberman.

  11. Risk factors for low birth weight according to the multiple logistic regression model. A retrospective cohort study in José María Morelos municipality, Quintana Roo, Mexico

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    José Franco Monsrea

    2018-01-01

    Full Text Available Resumen INTRODUCCIÓN El bajo peso al nacer ha constituido un enigma para la ciencia a través de los tiempos. Múltiples han sido los trabajos de investigación realizados con respecto a las causas que lo producen y los efectos que provoca. El bajo peso al nacer es un indicador que permite predecir la probabilidad de sobrevivencia de un niño. De hecho, existe una relación exponencial entre el déficit de peso, la edad gestacional y la mortalidad perinatal. La regresión logística múltiple es uno de los instrumentos estadísticos más expresivos y versátiles de que se dispone para el análisis de datos tanto en clínica y en epidemiología como en salud pública. OBJETIVO Evaluar de forma multivariada la importancia de 17 variables independientes en el bajo peso al nacer (variable dependiente, de niños nacidos en el municipio maya de José María Morelos, Quintana Roo, México. MÉTODOS Estudio epidemiológico observacional analítico de cohortes, con temporalidad retrospectiva. Se registraron todos los nacimientos que cumplieron con los criterios de inclusión, ocurridos en el Hospital Integral José María Morelos de la Secretaría de Salud, correspondientes al municipio maya de José María Morelos, durante el período comprendido del 1 de agosto de 2014 al 31 de julio de 2015. El número total de recién nacidos registrados fue de 1147; 84 de estos (7,32% tenían bajo peso al nacer. Para evaluar la asociación independiente entre las variables explicativas o factores de riesgo y la variable respuesta, se realizó un análisis de regresión logística múltiple utilizando el software IBM SPSS Statistics 22. RESULTADOS En orden numérico ascendente de valores de odds ratios > 1 señalaron la contribución positiva de las variables explicativas o factores de riesgo: estado civil no–casada (1,08, intervalo de confianza del 95%: 0,55 a 2,10; edad a la menarca ≤ 12 años (1,08, intervalo de confianza del 95%: 0,64 a 1,84; antecedentes de

  12. Comparação quantitativa da comunidade de aves de um fragmento de floresta semidecidual do interior do Estado de São Paulo em intervalo de 30 anos A 30-year quantitative comparison of the bird community of a semideciduous forest remnant in the state of São Paulo

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    Vagner Cavarzere

    2012-12-01

    Full Text Available Poucos estudos avaliaram em longo prazo a variação no tamanho populacional das espécies de aves em fragmentos florestais. Para avaliar a riqueza e a abundância específica da comunidade de aves de um remanescente de mata semidecidual do interior do Estado de São Paulo, sudeste do Brasil, foi conduzido o censo da avifauna florestal utilizando-se a metodologia de contagem em transecção. Estes resultados foram comparados com levantamento realizado na mesma localidade 30 anos antes, e as aves foram classificadas de acordo com suas categorias alimentares com a finalidade de associá-las à tendência ao aumento/diminuição de suas abundâncias após este intervalo de tempo. Embora tenha havido predominância de espécies com diminuição populacional, todas as categorias tróficas analisadas apresentaram também espécies com aumento em suas abundâncias. A maioria das espécies com propensão a deslocarem-se entre fragmentos apresentou diminuição em suas abundâncias. Sugerimos que, em relação a suas abundâncias específicas, as categorias tróficas são igualmente afetadas pelos processos da fragmentação, e que a regeneração florestal sofrida pelo remanescente pode ter resultado na perda de espécies de bordas. Espécies cujas abundâncias tenham reduzido neste intervalo de tempo podem sofrer extinção local futuramente.Few studies have evaluated long-term changes in avian abundance in forest remnants. To compare both species richness and abundance of the bird community in a forest fragment located in the municipality of Gália, state of São Paulo, southeastern Brazil, we surveyed forest birds using transect counts. We compared our results with a survey conducted 30 years earlier at the same locality and further classified bird species according to their food habits to eventually predict fluctuations of specific abundance. Although species with population declines predominated in the community, all trophic categories had species

  13. La técnica de escalamiento lineal por intervalos: una propuesta de estandarización aplicada a la medición de niveles de bienestar social || Interval Linear Scaling Technique: Proposal for Standardization Applied to the Measurement of Social Well-Being Levels

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    Actis di Pasquale, Eugenio

    2017-06-01

    Full Text Available En el presente estudio realizamos una propuesta de estandarización de indicadores basada en la técnica de escalameniento lineal (LST por sus siglas en inglés que denominamos "LST por intervalos". Los métodos tradicionales poseen ciertas limitaciones diferenciales en cuanto a invariancia, robustez, posibilidad de analizar series temporales, pérdida de la variabilidad original de los datos y capacidad de generar escalas ordinales que representen niveles - bajo, medio, alto - del fenómeno social estudiado. La LST por intervalos consigue superar esas limitaciones a través de dos etapas: 1 la fijación de niveles de correspondencia intermedios a través de un consenso intersubjetivo entre especialistas, y 2 la estandarización lineal entre los valores de referencia. El método propuesto representa un doble avance. Por un lado, permite construir índices parciales (correspondientes a cada dimensión de un concepto que satisfacen todas las condiciones deseadas. Por otro lado, generar una escala ordinal equiparable entre los distintos componentes que están listos para ser agregados por algún método particular que no elimine esa condición. Para ilustrar estas ventajas se presenta un ejercicio de transformación aplicado a tres indicadores de bienestar social con datos de Argentina. No obstante, el método puede ser aplicado para la estandarización de otros conceptos teóricos. || In the present study, we propose a standardization of indicators based on the Linear Scaling Technique (LST that is called "interval LST". Traditional methods have certain limitations in terms of robustness, capability to analyze time series, loss of original variability for data and capability to generate ordinal scales for representing levels - low, medium, and high - of the social phenomenon to be studied. This technique manages to overcome these limitations through two stages: 1 establishing intermediate levels of correspondence through an inter

  14. Atributos físicos do solo e intervalo hídrico ótimo de um Latossolo Vermelho distrófico sob controle de tráfego agrícola Soil physical attributes and least limiting water range of a Distrofic Red Latossol under agricultural traffic control

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    Antoniane Arantes de Oliveira Roque

    2011-09-01

    Full Text Available Com a adoção da colheita mecanizada no sistema de manejo da cana-de-açúcar, surge a preocupação da compactação do solo e seus efeitos danosos na disponibilidade de água às plantas. Uma recente técnica de manejo da mecanização agrícola denominada controle de tráfego representa uma alternativa para o cultivo de cana-de-açúcar, pois separa as zonas de tráfego das zonas em que há crescimento das plantas, concentrando a passagem de pneus em linhas delimitadas. O presente estudo teve por objetivo avaliar o efeito do controle de tráfego em áreas cultivadas com cana-de-açúcar, sobre a qualidade física do solo, no sistema de cana colhida mecanicamente sem queima (cana-crua. A pesquisa foi desenvolvida em área cultivada com cana-de-açúcar com os seguintes tratamentos: com colheita mecanizada tradicional; com controle de tráfego - aumento de bitola; com controle de tráfego - aumento de bitola e piloto automático. Foi avaliada a densidade do solo, a macro e a microporosidade do solo nas camadas de 0,00-0,10, 0,10-0,20 e 0,20-0,30m de profundidade, na linha de plantio, no entrerrodado e sob o rodado da cultura da cana-de-açúcar, bem como, o intervalo hídrico ótimo na camada de 0,00-0,20m de profundidade. O trabalho foi realizado dentro de um experimento trifatorial, com parcelas subsubdivididas no delineamento em blocos ao acaso. O intervalo hídrico ótimo permitiu verificar que os manejos com controle de tráfego apresentaram uma maior disponibilidade de água às culturas.The adoption of mechanized harvesting associated to the sugarcane handling system generates ground compaction which affects the water availability to the plants. The recent handling technique named traffic control is viewed as an alternative for sugarcane mechanization, in which traffic space is separated from plant growing spaces, concentrating the tires path in delimited lines. This study aimed to evaluate the effect of traffic control in areas

  15. ANÁLISIS ELECTROCARDIOGRÁFICO DE LA DISPERSIÓN DEL INTERVALO TPICO-TFINAL EN EL INFARTO AGUDO DE MIOCARDIO CON ELEVACIÓN DEL ST / Electrocardiographic analysis of the T peak-T end interval dispersion in acute myocardial infarction with ST-segment elevation

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    Raimundo Carmona Puerta

    2010-09-01

    Full Text Available Resumen Introducción y objetivos: La dispersión del intervalo TPICO-TFINAL (Tpeak-Tend constituye una novedosa variable electrocardiográfica asociada recientemente, al riesgo de arritmias ventriculares malignas en el síndrome de Brugada, pero apenas se ha estudiado en el infarto agudo de miocardio con elevación del segmento ST, por lo que se decidió analizarlo en este contexto. Métodos: Se realizó un estudio de corte transversal donde se compararon los electrocardiogramas de 37 pacientes con infarto con elevación del segmento ST y otros 37, supuestamente sanos con respecto a las variables electrocardiográficas que evalúan la repolarización ventricular. Resultados: Se encontraron diferencias altamente significativas (p<0,001 al comparar a los pacientes infartados (QT 416,9 ± 42,3; QTc 431,4 ± 36,2 con los sanos (QT 441,2 ± 57,4 y QTc 477,6 ± 58,5, y significativas (p < 0,05 en la TPICO-TFINAL (37.2 ms vs. 21,6 ms. Existió correlación significativa entre el QT y la TPICO-TFINAL en el IMACEST inferior y ántero-septal, la que fue doblemente intensa en la localización ántero-septal (r = 0,34 vs. r = 0,80. Conclusiones: La dispersión del intervalo TPICO-TFINAL fue significativamente mayor en pacientes con infarto agudo de miocardio con elevación del segmento ST, independientemente de la localización del infarto. / Abstract Introduction and objectives: Tpeak-Tend interval dispersion is a new electrocardiographic variable recently associated to the risk of malignant ventricular arrhythmias in Brugada syndrome but it has hardly been studied in the acute myocardial infarction with ST-segment elevation. That is why it was analyzed in this context. Methods: A cross-sectional study was carried out in which the electrocardiograms of 37 patients with ST-segment elevation myocardial infarctions and other 37 apparently healthy patients (regarding electrocardiographic variables that assess ventricular repolarization were compared. Results

  16. Factors associated to inpatient mortality rates in type-2-diabetic patients: a cross-sectional analytical study in three Peruvian hospitals

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    Noé Atamari-Anahui

    2017-12-01

    Full Text Available Resumen INTRODUCCIÓN La mortalidad por diabetes se ha incrementado en los últimos años. En Perú, existen escasos estudios acerca de la mortalidad intrahospitalaria por diabetes en provincias. OBJETIVOS Determinar los factores asociados a mortalidad intrahospitalaria en pacientes con diabetes mellitus tipo 2 en tres hospitales de la sierra sur del Perú. MÉTODOS Se realizó un estudio de corte transversal analítico. Se incluyó a todos los pacientes con diabetes mellitus tipo 2 hospitalizados en la ciudad del Cusco durante el año 2016. Se evaluó las características socioeducativas y clínicas, teniendo a la “defunción” como variable de interés. Se calculó las razones de prevalencias crudas y ajustadas, mediante los modelos lineales generalizados, con familia Poisson y función de enlace log, con sus respectivos intervalos de confianza al 95%. Se consideró significativos los valores p < 0,05. RESULTADOS De los 153 pacientes, el 33,3% (51 murió en la hospitalización. Incrementó la frecuencia de mortalidad: por cada año de edad del paciente (razón de prevalencias ajustada 1,02; intervalo de confianza 95%: 1,01 a 1,03; valor p < 0,001, por haber ingresado por el servicio de emergencia (razón de prevalencias ajustada 1,93; intervalo de confianza 95%: 1,34 a 2,77; valor p < 0,001, por ser un paciente que reingresa al hospital (razón de prevalencias ajustada 2,01; intervalo de confianza 95%: 1,36 a 2,98; valor p < 0,001 y por haber tenido una complicación hospitalaria metabólica (razón de prevalencias ajustada 1,61; intervalo de confianza 95%: 1,07 a 2,43; valor p = 0,024 o renal (razón de prevalencias ajustada 1,47; intervalo de confianza 95%: 1,30 a 1,67; valor p < 0,001. En cambio, disminuyó la frecuencia mortalidad el que su causa de hospitalización haya sido por una infección del tracto urinario (razón de prevalencia ajustada 0,50; intervalo de confianza 95%: 0,35 a 0,72; valor p < 0,001; ajustado por siete variables

  17. Intervalo hídrico ótimo e porosidade de solos cultivados em área de proteção ambiental do sul de Minas Gerais Least limiting water range and porosity of cultivated soils in an environmental protection area in the south of Minas Gerais

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    Vico Mendes Pereira Lima

    2009-10-01

    Full Text Available Condições físicas restritivas ao adequado desenvolvimento das plantas reduzem a capacidade produtiva dos solos e a sustentabilidade ambiental. Um importante parâmetro para expressar essas restrições é o intervalo hídrico ótimo (IHO, por representar, conjuntamente, atributos físicos do solo que influenciam o desenvolvimento de plantas. Com o objetivo de avaliar o IHO e a porosidade de solos cultivados com café e pastagem na microbacia do ribeirão Capituvas, local representativo da APA Coqueiral, coletaram-se amostras indeformadas no Latossolo Vermelho distrófico típico (LVd, no Argissolo Vermelho eutrófico típico (PVe e no Cambissolo Háplico distrófico típico (CXbd, nas camadas de 0-5, 20-25 e 40-45 cm, respectivamente. Os poros com diâmetro > 145 µm foram os mais afetados pelo manejo. Apesar de não haver diferenças entre os microporos (poros com diâmetro CXbd > PVe. Conclui-se que o IHO é um parâmetro que pode ser utilizado com segurança na quantificação das alterações que ocorrem na disponibilidade de água dos solos submetidos a diferentes usos e manejos.Restrictive physical conditions for an adequate plant development reduce the productive capacity of soils and environmental sustainability. An important parameter to express these restrictions is the least limiting water range (LLWR, which is used in combination with soil physical properties that influence plant development. To evaluate the LLWR and porosity of soils under coffee and pasture in the Capituvas River microbasin, a representative area of the Coqueiral Resereve was chosen. Undisturbed samples of a typical Dystrophic Red Latosol (LVd- Oxisol, typical Eutrophic Red Argisol (PVe-Ultisol and typical Dystrophic Haplic Cambisol (CXbd- Inceptisol were collected from the layers 0-5, 20-25 and 40-45 cm. Pores with a diameter of > 145 µm were most affected by the management. Although no statistical differences were verified among the micropores (pores CXbd

  18. Efeitos de esmolol, lidocaína e fentanil nos intervalos dispersão da onda P, QT, QTc e respostas hemodinâmicas à intubação endotraqueal durante indução com propofol: um estudo comparativo Efectos del esmolol, de la lidocaína y del fentanilo en los intervalos dispersión de la onda, QT, QTc y respuestas hemodinámicas a la intubación endotraqueal durante inducción con propofol: un estudio comparativo Effects of esmolol, lidocaine and fentanyl on P wave dispersion, QT, QTc intervals and hemodynamic responses to endotracheal intubation during propofol induction: a comparative study

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    Volkan Hancı

    2013-06-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Investigar o efeito de esmolol, lidocaína e fentanil na dispersão da onda P (DP, durações dos intervalos QT e QT corrigido (QTc e as respostas hemodinâmicas à intubação endotraqueal durante a indução com propofol. MÉTODOS: Foram incluídos 80 pacientes adultos, estado físico ASA I ou II, idade entre 18 e 60 anos, neste estudo prospectivo, randômico e duplo-cego. Todos os pacientes foram submetidos a exame eletrocardiográfico (ECG antes da indução da anestesia. Os pacientes foram randomicamente alocados em quatro grupos iguais. O grupo controle (Grupo C recebeu 5 mL de solução salina; o grupo esmolol (Grupo E recebeu 0,5 mg.kg-1 de esmolol; o grupo fentanil (Grupo F recebeu 2 µg.kg-1 de fentanil e o grupo lidocaína (Grupo L recebeu 1,5 mg.kg-1 de lidocaína antes da indução anestésica. A anestesia foi induzida com propofol. ECG foi feito em todos os pacientes durante o primeiro e o terceiro minutos de indução, 3 minutos após a administração de relaxante muscular e 5 e 10 minutos após intubação. A DP e intervalos QT foram medidos em todos os ECGs. Os intervalos QTc foram determinados com o uso da fórmula de Bazett. Frequência cardíaca (FC e pressão arterial média (PAM foram registradas antes e depois da indução anestésica, imediatamente após a intubação e em 1, 3, 5, 7 e 10 minutos após a intubação. RESULTADOS: Após a intubação, a FC aumentou significativamente nos Grupos C, L e F em comparação com o grupo controle. Porém, não houve diferença significativa nos valores da FC após a intubação entre os grupos E e controle. Nos Grupos C e L, a PAM aumentou significativamente após a intubação em comparação com o grupo controle. No entanto, nos Grupos L, F e E não houve diferença significativa entre os valores da PAM após a intubação em comparação com o grupo controle. A DP foi significativamente mais longa no Grupo C após a intubação em comparação com o

  19. Terapia trombolítica en pacientes con infarto agudo de miocardio en Cienfuegos

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    Lázaro Abilio Hernández Rodríguez

    2014-03-01

    Full Text Available Fundamento: el tratamiento trombolítico practicado a menos de dos horas, tras el inicio del infarto tiene resultados similares a la reperfusión mecánica. Objetivo: describir aspectos relevantes de la terapia trombolítica en pacientes con infarto agudo de miocardio con elevación del segmento ST en Cienfuegos. Métodos: estudio descriptivo, prospectivo, en 225 pacientes egresados (vivos y fallecidos desde el 1o de abril de 2012 al 31 marzo de 2013, de la Unidad de Cuidados Integrales del Corazón y la Unidad de Cuidados Intensivos Polivalentes, del Hospital Dr. Gustavo Aldereguía Lima. Las variables estudiadas se obtuvieron de la revisión de las historias clínicas e incluyeron: variables demográficas y clínicas, tiempos de demora, sitio, motivo de exclusión y nivel de prioridad para la trombolisis. Resultados: la media de edad superó los 60 años. Predominaron los hombres, hipertensos y de alto riesgo según la escala GRACE. El 29,7 % de los pacientes no recibió terapia trombolítica, debido mayormente al factor tiempo y la mayoría (82,3 % se trató en el Hospital. Las medianas de los tiempos de demora: síntomas-puerta, puerta-droga y síntomas-droga fueron 90, 35 y 140 minutos respectivamente. Conclusiones: la trombolisis extrahospitalaria acorta el tiempo total de isquemia, pero pocos pacientes se beneficiaron de ella. Los retrasos para la terapia trombolítica en Cienfuegos continúan por encima de los estándares requeridos.

  20. Intervalo hídrico ótimo de um latossolo vermelho distrófico, após o primeiro período de pastejo contínuo de brachiaria ruziziensis, em sistema integração lavoura-pecuária

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    Jonez Fidalski

    2013-06-01

    Full Text Available O intervalo hídrico ótimo (IHO destaca-se como um dos melhores indicadores da qualidade física do solo, sob sistemas intensivos de produção. O objetivo deste trabalho foi avaliar a qualidade física de um Latossolo Vermelho distrófico típico por meio do IHO, após três safras agrícolas de lavoura e o primeiro ano de sistema integração lavoura-pecuária, em Xambrê, noroeste do Paraná. O experimento foi implantado em blocos casualizados, com três repetições. Os tratamentos consistiram de quatro alturas de pastejo (0,10; 0,20; 0,30; e 0,40 m e um tratamento testemunha sem pastejo. A braquiária (BRACHIARIA RUZIZIENSIS foi semeada em março de 2010 e o pastejo contínuo de bovinos foi realizado durante 110 dias (março-setembro. Em outubro desse ano, coletaram-se 90 amostras de solo com cilindros metálicos (0,05 m de altura e 0,05 m de diâmetro no centro das camadas de 0-0,10; 0,10-0,20; e 0,20-0,30 m. Essas amostras foram utilizadas para obter a curva de retenção de água, a curva de resistência do solo à penetração e a densidade do solo (Ds; a partir dessas, foi calculado o IHO e obtida a densidade crítica do solo (Dsc. Utilizaram-se os limites críticos de -80 hPa, para a capacidade de campo (θcc; -15.000 hPa, para o ponto de murcha permanente (θpmp; 2,5 MPa, para a resistência do solo à penetração (θrp; e 0,10 m³ m-3, para a porosidade de aeração (θpa. O IHO foi maior a 0-0,10 m e a RP foi o fator de maior limitação do IHO em todas as camadas, especialmente a 0,10-0,20 e 0,20-0,30 m. As Dsc decresceram em profundidade de 1,66; 1,64; e 1,62 Mg m-3, respectivamente, para as camadas de 0-0,10; 0,10-0,20; e 0,20-0,30 m. O manejo desse solo sob sistema integração lavoura-pecuária com altura de pastejo de 0,10 m apresentou a maior frequência de amostras de solo com Ds ≥ Dsc.

  1. Prevalencia y factores asociados al síndrome de sobrecarga del cuidador primario de ancianos*

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    Doris Cardona A

    2013-03-01

    Full Text Available El síndrome de sobrecarga del cuidador de los adultos mayores es un estado de angustia que amenaza la salud física y mental por la dificultad persistente de cuidar a un familiar. Objetivo: identificar la prevalencia y factores asociados a sobrecarga en el cuidador primario de ancianos. Metodología: estudio descriptivo transversal, con 310 cuidadores principales de adultos mayores de 65 años y más de edad, seleccionados por muestreo aleatorio simple y entrevistados telefónicamente. Se calculó la prevalencia, Odds Ratio e intervalos de confianza del 95%. El procesamiento se realizó en stata 10.0, se calculó la prevalencia en el análisis univariado y se relacionó con características socio-demográficas y de salud del acompañado de la razón de disparidad con su intervalo de confianza, ajustados con regresión logística binaria. Resultados: la prevalencia de sobrecarga del cuidador en la ciudad de Medellín, fue de 12,17%, IC 95% [8,39-15,96] y sí se encontraron diferencias significativas en el número de horas diarias dedicadas al cuidado, entre los que presentaron síndrome y los que no. Conclusiones: como factores asociados se encontraron: edad y parentesco con el adulto mayor, número de hijos, horas diarias dedicadas al cuidado, estado de salud, abandono o disminución de actividad por el cuidado, las razones, necesidades y ayuda recibida de su familia; como factores de protección se identificó: independencia y el bueno o regular estado de salud del adulto mayor.

  2. FACTORES AMBIENTALES QUE AFECTAN LOS COMPONENTES DE PRODUCCION Y PRODUCTIVIDAD DURANTE LA VIDA DE LAS CERDAS

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    Jesús Enrique Ek Mex

    2014-12-01

    Full Text Available El objetivo de esta revisión fue describir algunos factores ambientales que influyen sobre los componentes de producción y productividad durante la estancia de las cerdas en el hato. La productividad de la cerda puede ser medida como el número o kilogramos de cerdos nacidos vivos o destetados por camada, por año o durante la estancia en el hato. El efecto de año y granja son importantes fuentes de variación, se deben principalmente a los cambios climatológicos y diferencias en el manejo. El efecto de época en las regiones tropicales es debido al estrés calórico y la alta humedad en la época de calor. Las cerdas de primer parto tienen intervalo entre partos e intervalo destete a la concepción mayor y camadas pequeñas en comparación con las cerdas multíparas. La productividad durante la vida productiva es afectada por el manejo particular de cada unidad de producción, la edad y el número de lechones nacidos al primer parto y la causa de desecho. La mayoría de los estudios son en zonas templadas. En conclusión, la productividad de las cerdas es afectada por las diferentes condiciones climáticas de cada región y a diferencias de manejo entre granjas en diferentes años y épocas, así como por el número de parto, por lo que es importante realizar la caracterización de las condiciones específicas de cada granja o región.

  3. Factores asociados a la aceptación de salpingoclasia posparto entre mujeres infectadas por el VIH

    Directory of Open Access Journals (Sweden)

    Figueroa-Damián Ricardo

    2001-01-01

    Full Text Available OBJETIVO: Identificar los factores asociados a la aceptación de salpingoclasia entre mujeres infectadas por el virus de inmunodeficiencia humana (VIH, después de finalizar su embarazo. MATERIAL Y MÉTODOS: Se realizó un estudio de casos y controles con 72 pacientes embarazadas seropositivas al VIH, en el Instituto Nacional de Perinatología (INPer, entre marzo de 1988 y febrero de 1999. Se consideraron casos a 49 mujeres que al finalizar el embarazo aceptaron la realización de salpingoclasia, 23 pacientes que rechazaron este procedimiento conformaron los controles. En cada paciente se investigaron antecedentes demográficos, historia sexual y reproductiva y condiciones relacionadas con la infección por el VIH. Se realizó estadística descriptiva, las variables categóricas se compararon con ji² o prueba exacta de Fisher y las continuas con t de Student, se hizo cálculo de razón de momios (RM, con intervalo de confianza al 95% y se realizó análisis estratificado mediante ji² de Mantel Haenszel para variables potencialmente confusoras. RESULTADOS: La edad promedio de las pacientes seropositivas fue de 25.5 ± 5.5 años. Estas ingresaron al hospital con una mediana de 27 semanas de gestación (intervalo de 7 a 40 semanas; 16 (22.2% no tuvieron control prenatal en el INPer. La mediana de tiempo de conocerse infectadas fue de nueve meses (intervalo 1 a 108. Las variables que se asociaron con la aceptación de salpingoclasia fueron: el antecedente de hijos previos, con una RM de 11.1 (IC 95% 3.4 a 36; la atención a partir del año de 1995, con una RM de 4.7 (IC 95% 1.7 a 13.3 y el tener cuando menos un hijo previo infectado, con una RM de 4.6 (IC 95% 1.1 a 23.1. El análisis estratificado no mostró modificación en la fuerza de asociación de estas variables con la aceptación de salpingoclasia. CONCLUSIONES: El tener hijos previos fue el factor que más influyó en la aceptación de salpingoclasia. El texto completo en inglés de este

  4. Factores pronósticos del cáncer de mama Prognostic factors of breast cancer

    Directory of Open Access Journals (Sweden)

    José María González Ortega

    2011-03-01

    Full Text Available Los factores pronósticos se deben diferenciar de los factores predictivos. Un factor pronóstico es cualquier medición utilizable en el momento de la cirugía que correlaciona con el intervalo libre de enfermedad o supervivencia global en ausencia de tratamiento adyuvante sistémico y como resultado es capaz de correlacionar con la historia natural de la enfermedad. En contraste, un factor predictivo es cualquier medición asociada con respuesta a un tratamiento dado. Entre los factores pronósticos del cáncer de mama existen factores clínicos, histológicos, biológicos, genéticos y psicosociales. En esta revisión de los factores pronósticos psicosociales ha quedado demostrado que el estrés y la depresión son factores pronósticos negativos en las pacientes con cáncer de mama. Se debe recordar que la evaluación de un solo parámetro pronóstico ayuda, pero no es útil para la gestión clínica y terapéutica de la paciente.The prognostic factors must to be differentiated of the predictive ones. A prognostic factor is any measurement used at moment of the surgery correlated with the free interval of disease or global survival in the absence of the systemic adjuvant treatment and as result is able to correlate with the natural history of the disease. In contrast, a predictive factor is any measurement associated with the response to a given treatment. Among the prognostic factors of the breast cancer are included the clinical, histological, biological, genetic and psychosocial factors. In present review of psychosocial prognostic factors has been demonstrated that the stress and the depression are negative prognostic factors in patients presenting with breast cancer. It is essential to remember that the assessment of just one prognostic parameter is a help but it is not useful to clinical and therapeutic management of the patient.

  5. Corruption Factors

    OpenAIRE

    Polterovich, Victor

    1998-01-01

    Among the factors that give rise to corruption, it is suggested that three groups be distinguished: fundamental factors rooted in the imperfection of economic institutions and economic policy, organizational factors ("weakness of the government"), and societal factors that depend on the prehistory and are connected with the mass culture and norms of bureaucratic behavior. A model in which corruption equilibrium is supported by non-optimum tax policy or by slow technical progress is compared w...

  6. Risk factors for acute kidney injury in a pediatric intensive care unit: a retrospective cohort study

    Directory of Open Access Journals (Sweden)

    Lina María Serna-Higuita

    2017-04-01

    Full Text Available Resumen ANTECEDENTES La incidencia de la lesión renal aguda en la población pediátrica, al igual que los factores de riesgo asociados a esta complicación, no se conocen con certeza. OBJETIVOS Este estudio tuvo como objetivo determinar la incidencia de lesión renal aguda en la población pediátrica críticamente enferma del Hospital Pablo Tobón Uribe en el período 2010-2014, e identificar factores de riesgo para su aparición. MÉTODOS Cohorte retrospectiva en la que se evaluaron los pacientes menores de 14 años, admitidos en las unidades de cuidados intensivos y de cuidados intermedios pediátricos. La lesión renal aguda se definió según la clasificación Kidney Disease Improving Global Outcomes, KDIGO. RESULTADOS En total 382 pacientes fueron evaluados, de los cuales 11,5% presentaron lesión renal aguda (tasa de incidencia 0,99 persona por día. En el análisis de regresión logística multivariada, los valores de plaquetas (Odds ratio: 2,947; intervalo de confianza 95%: 1,276-6,805 y el uso de vasopresores (Odds ratio: 4,601; intervalo de confianza 95%: 1,665-2,710 fueron identificados como factores de riesgo para lesión renal aguda. La estancia hospitalaria, al igual que la mortalidad en los pacientes con lesión renal aguda, fue significativamente mayor al compararla con el grupo sin esta patología (19 días versus 5 días y 3,7 días-persona versus 0,32 días-persona respectivamente. CONCLUSIONES La lesión renal aguda en los pacientes pediátricos que ingresan a los servicios de cuidados intensivos e intermedios pediátricos, se presenta en un porcentaje significativo. A su vez, esta complicación aumenta la estancia hospitalaria y la mortalidad. Los valores bajos de plaquetas y el uso de soporte vasopresor, fueron factores de riesgo independientes para el desarrollo de lesión renal aguda.

  7. Evaluation of the cell death mechanisms activated by the radiopharmaceutical {sup 177}Lu-DOTA-anti-CD20 in a dose range of 1 to 5 Gy; Evaluacion de los mecanismos de muerte celular activados por el radiofarmaco {sup 177}Lu-DOTA-anti-CD20 en un intervalo de dosis de 1 a 5 Gy

    Energy Technology Data Exchange (ETDEWEB)

    Azorin V, E.P.; Rojas C, E. L.; Martinez V, B. E.; Ramos B, J. C.; Jimenez M, N. P.; Ferro F, G., E-mail: erica.azorin@inin.gob.mx [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico)

    2016-10-15

    The radio immunotherapy with anti-CD20 antibodies significantly increases the remission rate of patients with B-cell lymphomas over expressing the CD20. The radiolabeled antibodies directed to surface antigens allow delivering scaled doses of radiation to specific targets thus limiting the dose to healthy tissue. The anti-CD20 causes cell death by two major pathways; activating the immune system to destroy malignant cells and inducing the activation of cell death pathways. The {sup 177}Lu is a beta particle emitter (max. 0.497 MeV) with a maximum reach on soft tissue of 0.7 mm and a half-life of 6.7 days. Several clinical studies have established a maximum tolerated dose (45 m Ci/m{sup 2}) for {sup 177}Lu-DOTA-rituximab, which shows a favorable clinical response without hematological toxicity. However, the molecular mechanisms of action by synergistic effect of anti-CD20 and radionuclide have not been studied. In this work was evaluated; by flow cytometry, the activation kinetics of the cell death mechanisms induced by the treatment with {sup 177}Lu-DOTA-Anti-CD20 in non-Hodgkin (Raji) lymphoma cells. The absorbed radiation dose delivered to the cell nucleus was calculated by Monte Carlo simulation, considering the contribution of the beta emissions of the radiopharmaceutical present in the cell membrane and surrounding environment, as well as crossfire. This work shows that the application of radiation doses of 1 to 5 Gy of the radiopharmaceutical {sup 177}Lu-DOTA-anti-CD20, are sufficient to induce cell death by apoptosis and arrest of the cell cycle. The combination of these factors (continuous delivery of radiation, activation of repair mechanisms and increased radio sensitivity) causes the acute activation of the apoptotic program resulting in significant cell death after 96 h of treatment. The temporal analysis of cell death suggests the early activation of apoptosis that is counteracted by the activation of repair processes caused by sustained irradiation

  8. El factoring

    Directory of Open Access Journals (Sweden)

    Alberto Rosenthal

    1988-04-01

    Full Text Available RESUMEN El artículo  presenta, una conceptualización general de lo que es el factoring, el origen del mismo, su evolución y hace una clasificación de los distintos tipos de factoring.

  9. Organizational factors

    International Nuclear Information System (INIS)

    Holy, J.

    1999-12-01

    The following organizational factors are considered with respect to the human factor and operating safety of nuclear power plants: external influences; objectives and strategy; positions and ways of management; allocation of resources; working with human resources; operators' training; coordination of work; knowledge of organization and management; proceduralization of the topic; labour organizing culture; self-improvement system; and communication. (P.A.)

  10. Incidencia y prevalencia de los factores de riesgo en el desarrollo

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    María Luisa Poch Olivé

    2013-05-01

    Full Text Available El objetivo de este estudio es conocer la incidencia y prevalencia de los factores de riesgo en el desarrollo en La Rioja con el fin de compararlos con otros estudios realizados y llegar a establecer las necesidades de intervención temprana en esta Comunidad. Se han recopilado y analizado los datos correspondientes a la totalidad de los nacimientos ocurridos durante los años 1998 a 2003 (inclusive en La Rioja. Se ha extraído, mediante el programa SPSS, la incidencia y prevalencia de los factores de riesgo (pre, peri y postnatal, comparativamente entre ellos, así como el momento de detección. Los resultados muestran: a una tendencia al alza de la tasa de natalidad; b prevalencia del riesgo situada en el intervalo entre el 3’51% y 4’73%; c entre los factores de riesgo, la prematuridad es la de mayor prevalencia e incidencia; y, d la detección del riesgo se realiza en edad temprana, predominantemente durante los primeros seis meses de vida, con un porcentaje medio de detección neonatal del 71’52% diferencial interanualmente. Conocer las situaciones de riesgo y su detección temprana permiten establecer programas de prevención e intervención infantil y familiar para optimizar el desarrollo.

  11. Discriminación de fuentes de control temporal en programas de reforzamiento de intervalo

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    Óscar García-Leal

    2009-01-01

    activo. Se utilizaron ocho ratas distribuidas en dos grupos con diferente razón y se compararon dos fases, una con discriminativo y otra sin este. Se encontró que la inclusión de la señal alteró la tasa de respuestas en los componentes de menor duración.

  12. Pacientes Cirróticos com Escore Child-Pugh C Apresentam Intervalos QT mais Longos

    OpenAIRE

    Lanzieri, Pedro Gemal; Gismondi, Ronaldo Altenburg; Chimelli, Matheus de Castro Abi-Ramia; Cysne, Raíssa Pereira; Guaraná, Thais; Mesquita, Cláudio Tinoco; Mocarzel, Luís Otávio

    2017-01-01

    Abstract Background and aims: Cirrhotic cardiomyopathy has been used to describe chronic cardiac dysfunction in cirrhotic patients with no previous structural heart disease. Additionally, QT prolongation is one of the most important cardiac alterations related to cirrhosis. Previous studies suggest that QT prolongation is associated with a higher mortality rate among cirrhotic patients. The aim of this study was to analyze QT intervals according to cirrhosis severity as measured by the Child...

  13. Competitiveness factors

    OpenAIRE

    Popa Liliana-Viorica

    2012-01-01

    Porter's theory supports the idea that, despite the globalization of production and trade, the competitive advantage is created in a national framework, nations, through their institutional, natural, cultural, economic characteristics ultimately determining the development of certain economic activities. The factors considered by Porter as determinants for the competitive advantage are grouped in four categories, the linkages between them being important as well

  14. Análisis multifactorial de los factores de riesgo de bajo peso al nacer en Salvador, Bahia

    Directory of Open Access Journals (Sweden)

    Solla Jorge José Santos Pereira

    1997-01-01

    Full Text Available El presente estudio constituye un análisis multifactorial de los factores de riesgo de bajo peso al nacer en un grupo de recién nacidos en una zona urbana del Brasil. Se incluyeron en el estudio un total de 1 023 nacidos vivos, dados a luz en cuatro maternidades de Salvador, Bahia, entre julio de 1987 y febrero de 1988. Las fuentes de información fueron las historias clínicas y las entrevistas con las madres en la maternidad. El análisis se realizó mediante regresión logística. En el modelo final los factores de riesgo incluidos fueron los siguientes: edad materna menos de 21 años o más de 35; edad gestacional menos de 38 semanas; resultado desfavorable del embarazo anterior; intervalo intergenésico previo de 12 meses o menos; tabaquismo; e hipertensión. Se presentan los valores del riesgo atribuible poblacional para los factores de riesgo incluidos en el modelo final. Esos factores deben emplearse para detectar a las gestantes con alto riesgo de dar a luz un niño de bajo peso, a las que debe brindarse mayor atención prenatal.

  15. Risk factors

    International Nuclear Information System (INIS)

    Dennery, M.; Dupont, M.A.

    2007-01-01

    This article deals with the development of risk management in the gas sector business: why a risk factor legal mention must precede any published financial information? Do gas companies have to face new risks? Is there specific risks bound to gas activities? Why companies want to master their risks? Is it mandatory or just a new habit? Do they expect a real benefit in return? These are the risk management questions that are analyzed in this article which is based on the public communication of 15 gas companies randomly selected over the world. The information comes from their annual reports or from documents available on their web sites. The intention of this document is not to be exhaustive or to make statistics but only to shade light on the risk factors of the gas sector. (J.S.)

  16. Análisis de posibles factores determinantes de la proporción sexual secundaria en una población Toba

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    Lanza, Norberto

    2005-01-01

    Full Text Available En mamíferos, una de las posibles estrategias para maximizar el éxito reproductivo de las hembras, es ajustar la proporción sexual de sus descendientes. Como Trivers y Willard propusieron en 1973 si la varianza en el éxito reproductivo es mayor en un sexo que en el otro y este éxito está determinado por la condición física de la madre, aquellas que se encuentren en buenas condiciones favorecerían el sexo que mayor varianza tenga en el éxito reproductivo. El objetivo de este trabajo fue evaluar esta hipótesis en una población rural Toba de la provincia de Formosa. Se relevaron 154 historias reproductivas, comprendiendo 635 nacimientos. Se analizó la variación de la proporción sexual secundaria con relación a la edad de madre, el orden de parición y el intervalo intergenésico. Nuestros resultados muestran que la proporción de varones al nacimiento aumenta con la edad de la madre, el orden de parición y el intervalo intergenésico. Sin embargo, es posible que estos factores no sean buenos predictores de la condición física materna. Esto plantea un marco de análisis más complejo y la necesidad de considerar otros parámetros que detallen mejor la historia de vida de los individuos.

  17. Factores de riesgo para malaria por Plasmodium vivax en una población rural de Trujillo, Perú

    Directory of Open Access Journals (Sweden)

    Claudia Rodríguez U

    2007-01-01

    Full Text Available Objetivo: Identificar los factores de riesgo asociados a malaria por Plasmodium vivax en una población rural de la cost norte del Perú (Laredo, Trujillo, entre marzo y octubre del 2004. Material y Métodos: Se aplicó un cuestionario a los casos de malaria y a sus respectivos controles; los casos fueron identificados por la presencia de cuadro clínico y examen microscópico positivo al parásito, y los controles fueron personas que no tuvieron la enfermedad, pareados por edad, sexo y localidad con respecto al caso. Se calculó el OR y el intervalo de confianza al 95% (IC95 con la regresión logística. Resultados: Se incluyeron 101 pares de casos y controles. Se identificó como factores de riesgo al antecedente familiar de malaria en el último año (OR: 4,62; IC95: 1,90 - 11,26, la presencia de una acequia a 100 metros o menos de vivienda (OR 4,61; IC95: 2,15 - 9,89 o de un pozo artesanal (OR: 10,93; IC95: 3,45 - 34,58. Conclusión: Los antecedentes familiares y la cercanía de la vivienda a potenciales criaderos son factores de riesgo para el desarrollo de malaria por P.vivax en la zona rural de Laredo.

  18. Factores asociados a la infestación intradomiciliaria por Aedes aegypti en el distrito de Tambogrande, Piura 2004

    Directory of Open Access Journals (Sweden)

    Edwar J. Pozo

    2007-04-01

    Full Text Available Objetivos: Determinar los factores asociados para la infestación de las viviendas por Aedes aegypti en el distrito de Tambogrande, Piura. Materiales y métodos: Realizamos un estudio de casos y controles en la capital del distrito de Tambogrande, en diciembre de 2004. Consideramos como vivienda-caso (Vc a la vivienda positiva a la infestación por Ae. aegypti, y vivienda-control (Vo a la vivienda negativa a la infestación por Ae. aegypti en por lo menos un año, de acuerdo a los registros de las actividades de control larvario. Por cada caso consideramos dos controles. La encuesta incluyó factores ambientales, sociales y culturales, y se aplicó a la persona encargada del cuidado de la vivienda. Los factores asociados con un valor de p<0,10 en el análisis bivariado, fueron ingresados a un modelo de regresión logística para estimar los OR ajustados y los intervalos de confianza al 95% (IC. Resultados: Encuestamos 60 Vc y 124 Vo. Los factores asociados encontrados en modelo logístico múltiple fueron la presencia de botellas dentro de la vivienda (OR: 7,66; IC: 2,95-19,84, vivienda ubicada a menos de 200 m de una llantería (OR: 2,90; IC: 1,13-7,48, vivienda ubicada a menos de 200 m. de una maderera (OR: 2,76; IC: 1,14-6,66 y tener un jardín en el interior de la vivienda (OR: 2.31; IC: 0,98-7,48. Tener una trabajadora del hogar en la vivienda fue un factor protector (OR: 0,07; IC: 0,014- 0,37. Conclusiones: Los factores identificados deben ser tomados en cuenta para el desarrollo de programas de control vectorial en Tambogrande.

  19. Factores de riesgo para la enteropatía parasitaria en niños del municipio Las Tunas

    Directory of Open Access Journals (Sweden)

    Arley Fajardo Ochoa

    2015-11-01

    Full Text Available Se realizó un estudio analítico de tipo caso control, con el objetivo de determinar los factores de riesgo para la enteropatía parasitaria, como principal causa del síndrome de malabsorción intestinal en niños del municipio de Las Tunas durante el año 2011. El mismo fue realizado en el Hospital Pediátrico Provincial “Mártires de Las Tunas”, con una muestra de 87 pacientes que formaron parte del grupo de estudio, cuyos datos se recolectaron de la consulta médica de gastroenterología en el policlínico de consulta externa de dicha unidad asistencial y 174 en el grupo control, tomados de pacientes que acudieron a la consulta de urología, paralela en tiempo y contigua a la de gastroenterología. A cada grupo se le realizó un interrogatorio y examen físico exhaustivo, que permitió recoger todos los posibles factores de riesgo existentes. Para la determinación de los factores de riesgo se utilizaron los paquetes de programas estadísticos Epinfo versión 6, en el que se realizaron análisis univariados y se evaluó el ODDS RATIO, intervalo de confianza y probabilidad. El procesamiento de los datos se realizó con un 95% de confiabilidad. Los factores de riesgo asociados a la enteropatía parasitaria fueron: pertenecer al sexo masculino, los hábitos higiénicos inadecuados, estado nutricional inadecuado, la ingestión de agua sin hervir y la evacuación de excretas no sanitarias. Se recomienda realizar estudios analíticos para determinar la asociación de otros factores de riesgo, con vistas a establecer programas de intervención en estos pacientes.

  20. Heart disease - risk factors

    Science.gov (United States)

    ... prevention; CVD - risk factors; Cardiovascular disease - risk factors; Coronary artery disease - risk factors; CAD - risk factors ... do smoke, quit. Controlling your cholesterol through diet, exercise, and medicines . Controlling high blood pressure through diet, ...

  1. Factores condicionantes de depresión en trabajadores metalúrgicos

    Directory of Open Access Journals (Sweden)

    Cecilia Díaz

    2004-03-01

    Full Text Available Objetivos: Buscar factores determinantes en el desarrollo del cuadro clínico de depresión. Material y Métodos: Estudio de 153 trabajadores ferroviarios y operadores de grúa-puente en una empresa minero metalúrgica de cobre, evaluados con la Escala de Hamilton. Se detecta 25 casos probables de depresión, quienes son examinados por el médico psiquiatra. En 13 se confirma el diagnóstico y para fines comparativos constituyen el grupo "casos". El resto de la población, 140, integran el grupo "control". Se compara los grupos estadísticamente por regresión logística. Usamos el Programa SPSS / 6,1 y el intervalo de confianza se calcula para el 95% de certeza. Resultados: Se encuentra una prevalencia de depresión de 8,49%. El sentimiento de pérdida actual, disfunción familiar severa, condiciones de trabajo inadecuadas y desempeño laboral presentan razón de probabilidad con valor de p altamente significativo (59,3; 11,4; 10,0 y 11,2, respectivamente. Edad, estado civil, nivel de instrucción, consumo de alcohol o tabaco, antecedentes personales o familiares de trastorno psiquiátrico y dolencia orgánica crónica no son significativos. Conclusiones: La depresión en la población estudiada está fuertemente asociada a sentimiento de pérdida actual, disfunción familiar severa, desempeño laboral y condiciones de trabajo inadecuadas, que constituyen los factores de riesgo.

  2. Factores de riesgo de neumonía nosocomial en terapia intensiva. Hospital “Dr. Ernesto Guevara”

    Directory of Open Access Journals (Sweden)

    Yadira Santiesteban Escalona

    2015-11-01

    Full Text Available Se realizó un estudio analítico, de tipo caso control pareados 1:2, para determinar los factores de riesgo de neumonía nosocomial en pacientes ingresados en terapia intensiva del Hospital “Dr. Ernesto Guevara de la Serna” de Las Tunas, en el período de enero de 2010 a diciembre de 2011. El universo fue de 1035 pacientes ingresados en terapia intensiva (UCI, en dicho período, de ellos constituyeron la muestra, denominada “casos”, 56 pacientes que desarrollaron Neumonía Nosocomial durante su estadía en UCI. Para el “control” de los factores de confusión, por cada caso, se parearon dos pacientes sin diagnóstico de neumonía. La información se obtuvo de fuentes secundarias (historias clínicas. A los casos y a los controles se les llenó una planilla de vaciamiento de datos con las variables analizadas. Los datos se procesaron utilizando el paquete de programas estadísticos Epinfo, versión 6. Para el estudio de los factores de riesgo se realizaron análisis univariados, evaluándose: ODDS RATIO, intervalo de confianza y probabilidad. Resultaron ser factores de riesgo para presentar neumonía nosocomial: la intubación endotraqueal, los trastornos de conciencia, el aislamiento de bacilos no fermentadores, citrobacter diversus y/o klebsiella ssp., haber requerido neurocirugía, el uso de tratamiento antibiótico previo, antiácidos anti H2, nutrición parenteral y la estadía en UCI mayor de siete días.

  3. Risk Factors for Scleroderma

    Science.gov (United States)

    ... are here: Home For Patients Risk Factors Risk Factors for Scleroderma The cause of scleroderma is still ... Scientists are working diligently to understand what biological factors contribute to scleroderma pathogenesis. Genetic Risk Scleroderma does ...

  4. Factores de riesgo del recién nacido macrosómico

    Directory of Open Access Journals (Sweden)

    Irka Ballesté López

    2004-03-01

    Full Text Available Para reconocer algunos factores asociados a la macrosomía, se realizó un estudio tipo caso control. Los casos estaban formados por 170 neonatos con 4 000 g y más y los controles por 260 recién nacidos con peso entre 3 000 y 3 999 g. Se evaluó un grupo de factores de riesgo materno, antecedentes obstétricos, relacionados con el parto y con el recién nacido. Se estimó el riesgo relativo de cada factor de asociarse con la macrosomía mediante la razón de productos cruzados (OR y se evaluó la significación estadística mediante el intervalo de confianza del 95 % (IC-95 % y mediante la prueba de chi-cuadrado (X2 o la prueba de Fisher según conviniera en cada caso.Se halló asociado con la macrosomía, la edad materna mayor de 30 años (OR = 4, la edad gestacional mayor de 42 semanas (OR = 5,8, la talla materna mayor de 1,70 cm (OR= 6,6, antecedente de hijo macrosómico anterior (OR = 5,7, la diabetes familiar (OR = 3,6 y el sexo masculino (OR = 2,8. No aumentó el riesgo de cesáreas ni de Apgar bajo.A case-control study was conducted to recognize some factors associated with macrosomia. The cases were 170 neonates with 4 000 g and over, whereas the controls were 260 newborn infants with a weight that ranged between 3 000 and 3 999 g. A group of maternal risk factors, obstetric history, related to delivery and to the newborn infant were evaluated. The relative risk of each factor for associating with macrosomy was estimated by the cross product ratio (OR. The statistical significance was evaluated by the confidence interval of 95 % (CI-95 % and by the Chi square test (X2 or the Fisher test according to each case. Maternal age over 30 (OR=4, gestational age over 42 weeks (OR=5.8, maternal height over 1.70 cm (R=6.6, history of previous macrosomic children (OR=5.7, family diabetes (OR=3.6 and the male sex (OR=2.8 were associated with macrosomia. No increase was observed in the risk of cesarean section, or low Apgar score.

  5. Edad avanzada y factores de riesgo para infarto agudo de miocardio Risk factors for acute myocardial infarction in the elderly

    Directory of Open Access Journals (Sweden)

    M. A. Ciruzzi

    2002-12-01

    Full Text Available Este estudio caso-control analizó en los sujetos añosos el rol de los factores de riesgo coronario en el desarrollo del infarto agudo de miocardio (IAM, estableció la naturaleza de esta asociación y el grado de riesgo. Los datos fueron obtenidos en una investigación que incluyó 1060 casos y 1071 controles, realizada en 35 unidades coronarias de centros médicos de Argentina entre noviembre de 1991 y agosto de 1994. Nuestro análisis se basó en la información de los sujetos mayores de 65 años. Los casos fueron 427 pacientes con un primer IAM. Los controles fueron 396 sujetos sin evidencias clinicas de enfermedad cardiovascular, seleccionados en los mismos centros que los casos. Los Odds Ratios (OR y su intervalo de confianza del 95% (IC 95% se obtuvieron mediante un análisis de regresión logística, incluyendo variables como la edad, educación, clase social, tabaquismo, antecedente de diabetes o hipertensión arterial, índice de masa corporal e historia familiar de enfermedad coronaria. Los factores de riesgo relacionados independientemente con IAM fueron los siguientes: hipercolesterolemia (colesterol sérico > 240 mg/dl: OR=1.76 (IC 95%: 1.25-2.49, tabaquismo: OR=1.6 (IC 95%: 1.06-2.4, hipertensión arterial: OR=2.05 (IC 95%: 1.51-2.73, diabetes OR=1.71 (IC 95%: 1.12-2.70, historia de un familiar con enfermedad coronaria: OR=1.36 (IC 95%: 0.93-1.97 y de dos o más familiares: OR=2.63 (IC 95%: 1.21-5.71. Este estudio, confirma en los sujetos de edad avanzada la importancia de la hipercolesterolemia, del tabaquismo, la hipertesión arterial, la diabetes y la historia familiar de enfermedad coronaria como factores de riesgo de IAMThis case-control study, analized the role of coronary risk factors in acute myocardial infarction (AMI in the elderly, and established the nature of this association and the degree of risk. Data were derived from an investigation (1060 cases and 1071 controls conducted in 35 coronary care units from clinical

  6. Risk factors for prolonged length of stay after colorectal surgery

    Directory of Open Access Journals (Sweden)

    Luiz Felipe de Campos Lobato

    2013-01-01

    Full Text Available Objective: Colorectal surgeons often struggle to explain to administrators/payers reasons for prolonged length of stay (LOS. This study aim was to identify factors associated with increased LOS after colorectal surgery. Design: The study population included patients from the 2007 American-College-of-Sur- geons-National-Surgical-Quality-Improvement-Program (ACS-NSQIP database undergoing ileocolic resection, segmental colectomy, or anterior resection. The study population was divided into normal (below 75th percentile and prolonged LOS (above the 75th percentile. A multivariate analysis was performed using prolonged LOS as dependent variable and ACS- NSQIP variables as predictive variables. P-value < 0.01 was considered significant. Results: 12,269 patients with a median LOS of 6 (inter-quartile range 4-9 days were includ- ed. There were 2,617 (21.3% patients with prolonged LOS (median 15 days, inter-quartile range 13-22. 1,308 (50% were female, and the median age was 69 (inter-quartile range 57-79 years. Risk factors for prolonged LOS were male gender, congestive heart failure, weight loss, Crohn's disease, preoperative albumin < 3.5 g/dL and hematocrit < 47%, base- line sepsis, ASA class ≥ 3, open surgery, surgical time ≥ 190 min, postoperative pneumonia, failure to wean from mechanical ventilation, deep venous thrombosis, urinary-tract in- fection, systemic sepsis, surgical site infection and reoperation within 30-days from the primary surgery. Conclusion: Multiple factors are associated with increased LOS after colorectal surgery. Our results are useful for surgeons to explain prolonged LOS to administrators/payers who are critical of this metric. Resumo: Objetivo: Os cirurgiões proctologistas muitas vezes enfrentam dificuldades para explicar aos administradores/contribuintes as razões para o prolongamento do tempo de interna- ção hospitalar (TIH. O objetivo deste estudo foi identificar os fatores associados ao aumen- to do TIH ap

  7. Risk factors for cervical cancer among HPV positive women in Mexico Factores de riesgo de cáncer cervical en mujeres VPH positivas en México

    Directory of Open Access Journals (Sweden)

    Yvonne N Flores

    2008-02-01

    Full Text Available OBJECTIVE: To identify factors that are associated with an increased risk of developing high-grade cervical intraepithelial neoplasia (CIN or cancer among human papillomavirus (HPV-positive women in Mexico. MATERIAL AND METHODS: A case-control study design was used. A total of 94 cases and 501 controls who met the study inclusion criteria were selected from the 7 732 women who participated in the Morelos HPV Study from May 1999 to June 2000. Risk factor information was obtained from interviews and from HPV viral load results. Odds ratios and 95 percent confidence intervals were estimated using unconditional multivariate regression. RESULTS: Increasing age, high viral load, a young age at first sexual intercourse, and a low socio-economic status are associated with an increased risk of disease among HPV-positive women. CONCLUSIONS: These results could have important implications for future screening activities in Mexico and other low resource countries.OBJETIVO: Identificar factores asociados con un mayor riesgo de desarrollar neoplasia intraepitelial cervical (NIC de alto grado o cáncer en mujeres con virus de papiloma humano (VPH, en México. MATERIAL Y MÉTODOS: Se utilizó un diseño de casos y controles. Un total de 94 casos y 501 controles fueron seleccionados de las 7 732 mujeres que participaron en el Estudio de VPH en Morelos, de mayo de 1999 a junio de 2000. La información sobre factores de riesgo se obtuvo de entrevistas y de los resultados de carga virales de VPH. Se estimaron razones de momios e intervalos de confianza de 95% con modelos multivariados de regresión no condicionada. RESULTADOS: El incremento de edad, la carga viral elevada, la edad temprana al inicio de la vida sexual y el nivel socioeconómico bajo se asocian con un mayor riesgo de enfermedad en mujeres VPH positivas. CONCLUSIONES: Estos resultados podrían tener implicaciones importantes a futuro para las actividades de tamizaje en México y en otros países de

  8. Factors and factorizations of graphs proof techniques in factor theory

    CERN Document Server

    Akiyama, Jin

    2011-01-01

    This book chronicles the development of graph factors and factorizations. It pursues a comprehensive approach, addressing most of the important results from hundreds of findings over the last century. One of the main themes is the observation that many theorems can be proved using only a few standard proof techniques. This stands in marked contrast to the seemingly countless, complex proof techniques offered by the extant body of papers and books. In addition to covering the history and development of this area, the book offers conjectures and discusses open problems. It also includes numerous explanatory figures that enable readers to progressively and intuitively understand the most important notions and proofs in the area of factors and factorization.

  9. Factores de riesgo de bajo peso al nacer Risk factors for low birthweight

    Directory of Open Access Journals (Sweden)

    Marcelo Bortman

    1998-05-01

    Full Text Available El bajo peso al nacer (BPN es el principal factor determinante conocido de la mortalidad infantil. Pese a la notable reducción de las tasas de mortalidad infantil y al aumento de las tasas de supervivencia de niños con BPN, en Neuquén, Argentina, no se han observado descensos notables de las tasas de BPN. El propósito de este estudio fue conocer los factores de riesgo de BPN, su frecuencia en la población y el papel de la atención prenatal en su prevención, y desarrollar una escala de riesgo que permita identificar a las mujeres en mayor riesgo de dar a luz un niño de bajo peso. Con tal propósito se realizó un estudio transversal en el cual se utilizó 50% de los datos del Sistema Informático Perinatal correspondientes al período 1988­1995 y procedentes de los 29 hospitales de la provincia de Neuquén (46 171 nacimientos. Se analizaron la distribución del peso y la frecuencia de los posibles factores de riesgo de BPN. La asociación entre estos factores y el BPN se analizó mediante un modelo de regresión logística. Con los resultados obtenidos se desarrolló una escala aditiva, que fue validada con el 50% restante de los registros de nacimientos. La razón de posibilidades (RP más elevada correspondió a la falta de atención prenatal (RP = 8,78; IC95%: 6,7 a 11,4. Las RP asociadas con una atención prenatal inadecuada, una primera consulta prenatal tardía, preeclampsia o eclampsia, hemorragia o anomalías de la placenta o sus membranas e historia de un hijo previo con BPN fueron mayores de 2,0. El riesgo de tener hijos con BPN también fue más alto en las mujeres mayores de 40 años, las menores de 20, las solteras, las fumadoras, aquellas cuyo intervalo intergenésico fue menor de 18 meses y las que tenían un índice de masa corporal menor de 20. Por último, se encontró una relación lineal directa entre el puntaje en la escala y el riesgo de tener un hijo con BPN.Low birthweight (LBW is the main known determinant of

  10. Amplification factor variable amplifier

    NARCIS (Netherlands)

    Akitsugu, Oshita; Nauta, Bram

    2007-01-01

    PROBLEM TO BE SOLVED: To provide an amplification factor variable amplifier capable of achieving temperature compensation of an amplification factor over a wide variable amplification factor range. ; SOLUTION: A Gilbert type amplification factor variable amplifier 11 amplifies an input signal and

  11. Amplification factor variable amplifier

    NARCIS (Netherlands)

    Akitsugu, Oshita; Nauta, Bram

    2010-01-01

    PROBLEM TO BE SOLVED: To provide an amplification factor variable amplifier capable of achieving temperature compensation of an amplification factor over a wide variable amplification factor range. ;SOLUTION: A Gilbert type amplification factor variable amplifier 11 amplifies an input signal and can

  12. Stochastic Matrix Factorization

    OpenAIRE

    Adams, Christopher

    2016-01-01

    This paper considers a restriction to non-negative matrix factorization in which at least one matrix factor is stochastic. That is, the elements of the matrix factors are non-negative and the columns of one matrix factor sum to 1. This restriction includes topic models, a popular method for analyzing unstructured data. It also includes a method for storing and finding pictures. The paper presents necessary and sufficient conditions on the observed data such that the factorization is unique. I...

  13. ISS Payload Human Factors

    Science.gov (United States)

    Ellenberger, Richard; Duvall, Laura; Dory, Jonathan

    2016-01-01

    The ISS Payload Human Factors Implementation Team (HFIT) is the Payload Developer's resource for Human Factors. HFIT is the interface between Payload Developers and ISS Payload Human Factors requirements in SSP 57000. ? HFIT provides recommendations on how to meet the Human Factors requirements and guidelines early in the design process. HFIT coordinates with the Payload Developer and Astronaut Office to find low cost solutions to Human Factors challenges for hardware operability issues.

  14. Factors affecting construction performance: exploratory factor analysis

    Science.gov (United States)

    Soewin, E.; Chinda, T.

    2018-04-01

    The present work attempts to develop a multidimensional performance evaluation framework for a construction company by considering all relevant measures of performance. Based on the previous studies, this study hypothesizes nine key factors, with a total of 57 associated items. The hypothesized factors, with their associated items, are then used to develop questionnaire survey to gather data. The exploratory factor analysis (EFA) was applied to the collected data which gave rise 10 factors with 57 items affecting construction performance. The findings further reveal that the items constituting ten key performance factors (KPIs) namely; 1) Time, 2) Cost, 3) Quality, 4) Safety & Health, 5) Internal Stakeholder, 6) External Stakeholder, 7) Client Satisfaction, 8) Financial Performance, 9) Environment, and 10) Information, Technology & Innovation. The analysis helps to develop multi-dimensional performance evaluation framework for an effective measurement of the construction performance. The 10 key performance factors can be broadly categorized into economic aspect, social aspect, environmental aspect, and technology aspects. It is important to understand a multi-dimension performance evaluation framework by including all key factors affecting the construction performance of a company, so that the management level can effectively plan to implement an effective performance development plan to match with the mission and vision of the company.

  15. Factorization of the Ising model form factors

    International Nuclear Information System (INIS)

    Assis, M; McCoy, B M; Maillard, J-M

    2011-01-01

    We present a general method for analytically factorizing the n-fold form factor integrals f (n) N,N (t) for the correlation functions of the Ising model on the diagonal in terms of the hypergeometric functions 2 F 1 ([1/2, N + 1/2]; [N + 1]; t) which appear in the form factor f (1) N,N (t). New quadratic recursion and quartic identities are obtained for the form factors for n = 2, 3. For n = 2, 3, 4 explicit results are given for the form factors. These factorizations are proved for all N for n = 2, 3. These results yield the emergence of palindromic polynomials canonically associated with elliptic curves. As a consequence, understanding the form factors amounts to describing and understanding an infinite set of palindromic polynomials, canonically associated with elliptic curves. From an analytical viewpoint the relation of these palindromic polynomials with hypergeometric functions associated with elliptic curves is made very explicitly, and from a differential algebra viewpoint this corresponds to the emergence of direct sums of differential operators homomorphic to symmetric powers of a second order operator associated with elliptic curve.

  16. Prediction of inspection intervals using the Markov analysis; Prediccion de intervalos de inspeccion utilizando analisis de Markov

    Energy Technology Data Exchange (ETDEWEB)

    Rea, R.; Arellano, J. [IIE, Calle Reforma 113, Col. Palmira, Cuernavaca, Morelos (Mexico)]. e-mail: rrea@iie.org.mx

    2005-07-01

    To solve the unmanageable number of states of Markov of systems that have a great number of components, it is intends a modification to the method of Markov, denominated Markov truncated analysis, in which is assumed that it is worthless the dependence among faults of components. With it the number of states is increased in a lineal way (not exponential) with the number of components of the system, simplifying the analysis vastly. As example, the proposed method was applied to the system HPCS of the CLV considering its 18 main components. It thinks about that each component can take three states: operational, with hidden fault and with revealed fault. Additionally, it takes into account the configuration of the system HPCS by means of a block diagram of dependability to estimate their unavailability at level system. The results of the model here proposed are compared with other methods and approaches used to simplify the Markov analysis. It also intends the modification of the intervals of inspection of three components of the system HPCS. This finishes with base in the developed Markov model and in the maximum time allowed by the code ASME (NUREG-1482) to inspect components of systems that are in reservation in nuclear power plants. (Author)

  17. O intervalo Escola-Universidade: mais do que uma questão genérica

    Directory of Open Access Journals (Sweden)

    Cristina Becker Lopes Perna

    2017-12-01

    Full Text Available O presente artigo almeja trazer à agenda das discussões sobre letramento na universidade a lacuna existente entre o ensino e a aprendizagem de gêneros escolares e de gêneros acadêmicos. Nossa inquietação é fruto de uma preocupação com os alunos ingressantes em instituições de ensino superior que não tiveram uma experiência escolar com vistas a uma prática social de letramento acadêmico. A partir do tema proposto, refletimos sobre como a teoria dos gêneros discursivos, bem como sua aplicabilidade, auxilia no desenvolvimento do letramento acadêmico desses alunos universitários. A proficiência, ou inserção, na esfera discursiva acadêmica está muito relacionada com a competência genérica que o aluno deve possuir para assegurar sua comunicação de forma a alcançar seu status de sujeito discursivo e transformador. Portanto, defendemos que, aliada à análise de gêneros discursivos acadêmicos, a metodologia de ensino de Português para Fins Acadêmicos, aos moldes da consagrada área de Inglês para Fins Acadêmicos (English for Academic Purposes, pode, em muito, contribuir para se criar uma tradição de letramento acadêmico que propicie ao estudante uma experiência mais significativa não somente na sua esfera acadêmica, mas também no domínio discursivo do qual ele venha a participar, uma vez egresso da universidade e apto para atuar na sua profissão.

  18. Intervalos de Confianza para el coeficiente alfa de Cronbach: aportes a la investigación pediátrica

    Directory of Open Access Journals (Sweden)

    Tomás Caycho-Rodríguez

    2017-06-01

    Full Text Available En la actualidad, es cada vez más común encontrar estudios que brinden evidencias de la confiabilidad de las puntuaciones obtenidas, por instrumentos de medida utilizadas en investigaciones en ciencias de la salud. Este es el caso de la valiosa contribución de Aguilar-Navarro et al, quienes adaptaron la Escala de Actitudes hacia la Alimentación Infantil de Iowa (IIFAS en México, reportando la confiabilidad a través del alfa de Cronbach.

  19. Shadowing para Aproximar la Solución de problemas Parabólicos Semilineales para intervalos de Tiempo Grandes.

    OpenAIRE

    Zavaleta Calderón, Ulices; Aragonéz Salazar, Nelson; Rodríguez, Roxana

    2015-01-01

    Se presenta un resultado de shadowing para un problema de evolucion parabolico no autonomo. Utilizando el metodo de Euler hacia atras se demuestra que bajo ciertas hipótesis de regularidad se puede aproximar usando shadowing la solucion de un problema de la forma                               u'(t) = A(t)u(t) + f(t);donde A(t) es el generador de un semigrupo analítico sobre un espacio de Banach.

  20. Bayesian Exploratory Factor Analysis

    DEFF Research Database (Denmark)

    Conti, Gabriella; Frühwirth-Schnatter, Sylvia; Heckman, James J.

    2014-01-01

    This paper develops and applies a Bayesian approach to Exploratory Factor Analysis that improves on ad hoc classical approaches. Our framework relies on dedicated factor models and simultaneously determines the number of factors, the allocation of each measurement to a unique factor, and the corr......This paper develops and applies a Bayesian approach to Exploratory Factor Analysis that improves on ad hoc classical approaches. Our framework relies on dedicated factor models and simultaneously determines the number of factors, the allocation of each measurement to a unique factor......, and the corresponding factor loadings. Classical identification criteria are applied and integrated into our Bayesian procedure to generate models that are stable and clearly interpretable. A Monte Carlo study confirms the validity of the approach. The method is used to produce interpretable low dimensional aggregates...

  1. Prevalencia y factores de riesgo de las lesiones de la mucosa oral en la población urbana del Uruguay

    Directory of Open Access Journals (Sweden)

    Beatriz Casnati

    Full Text Available Objetivo: El objetivo de este estudio fue determinar la prevalencia de las lesiones de la mucosa bucal e identificar los factores de riesgo en el desarrollo de las mismas en una muestra representativa de la población adulta urbana del Uruguay. Metodología: Se trata de un estudio transversal que registró 922 personas (537 F/385M, edades de 15-24, 35-44 y 65-74 años basado en un diseño muestral estratificado por conglomerado polietápico. A partir de los datos de la muestra se estimaron las prevalencias de cada entidad así como los intervalos de confianza al 95%. Resultados: La candidosis y las lesiones proliferativas se observaron en 26% y en 17% de las personas y se presentaron significativamente asociadas al género femenino. La prevalencia de la leucoplasia fue del 7% y en el análisis multivariado presentó una asociación significativa con el consumo de mate. Conclusiones: Las lesiones orales se presentan de manera prevalente en los adultos mayores en el Uruguay, lo que sugiere que se deberían implementar programas de prevención, diagnóstico y tratamiento adecuado de las mismas

  2. Factores asociados al ejercicio de la sexualidad de las y los adolescentes escolarizados de Cartagena – Colombia 2008

    Directory of Open Access Journals (Sweden)

    Carmen Elena Díaz Montes

    2014-03-01

    Full Text Available Title: Associated factors in the sexual practices of school adolescents of Cartagena- Colombia 2008Objetivo: Establecer las prácticas sexuales y los factores asociados al ejercicio de la sexualidad de las y los adolescentes escolarizados en Cartagena. Metodología: Estudio transversal, población 104.088 adolescentes estudiantes de secundaria en colegios oficiales y privados de Cartagena. Muestra 1.035 adolescentes, intervalo de confianza 95%, error 2%. Muestreo; multietapico. Se utilizaron una escala de conocimientos y actitudes y la escala Francis para valorar religiosidad. Resultados: La edad promedio de inicio de relaciones sexuales fue de 14.1 años, el 17% de los adolescentes ha tenido relaciones sexuales. Tener relaciones sexuales se asocia con ser varón, mayor grado de escolaridad, consumir cigarrillo, pertenecer a un grupo social, desigualdad de género, tener pareja y considerarla estable. Tener relaciones sexuales es más frecuente, en adolescentes de colegios públicos que privados. Conclusión: de los veintidós factores estudiados, ocho factores se mantuvieron fuertemente asociados al inicio de relaciones sexuales.AbstractObjective: To establish the sexual practices and the associated factors of the sexual behavior of school adolescents of Cartagena. Methodology: Transversal study, population 104.088 adolescent students of Secondary School of Public and private schools of Cartagena. Sample 1.035 adolescents, confidence level 95 %, and error 2 %. Sampling: multistage. Two scales of knowledge and attitudes were used, and the Francis scale. Results: The average age to start sexual relations was 14.1, 17% of the adolescents have had sexual relationships. To have sexual relations is associated significantly with the fact of being male, being in a higher grade, cigarette consumption, belonging to a social group, gender inequality, having a partner and considering him/her stable. Sexual relations are more common in public

  3. Heart Disease Risk Factors

    Science.gov (United States)

    ... risk factors are unique to women. These include: Menopause Use of hormonal birth control (certain types of combination pills, patches, ... risk factors are unique to women. These include: Menopause Use of hormonal birth control (certain types of combination pills, patches, ...

  4. Stroke - risk factors

    Science.gov (United States)

    ... Brain cells can die, causing lasting damage. Risk factors are things that increase your chance of getting ... disease or condition. This article discusses the risk factors for stroke and things you can do to ...

  5. Annual Adjustment Factors

    Data.gov (United States)

    Department of Housing and Urban Development — The Department of Housing and Urban Development establishes the rent adjustment factors - called Annual Adjustment Factors (AAFs) - on the basis of Consumer Price...

  6. Human factors in training

    International Nuclear Information System (INIS)

    Dutton, J.W.; Brown, W.R.

    1981-01-01

    The Human Factors concept is a focused effort directed at those activities which require human involvement. Training is, by its nature, an activity totally dependent on the Human Factor. This paper identifies several concerns significant to training situations and discusses how Human Factor awareness can increase the quality of learning. Psychology in the training arena is applied Human Factors. Training is a method of communication represented by sender, medium, and receiver. Two-thirds of this communications model involves the human element directly

  7. Mesonic Form Factors

    International Nuclear Information System (INIS)

    Bonnet, Frederic D.R.; Edwards, Robert G.; Felming, George T.; Randal Lewis; David Richards

    2003-01-01

    We have started a program to compute the electromagnetic form factors of mesons. We discuss the techniques used to compute the pion form factor and present preliminary results computed with domain wall valence fermions on MILC asqtad lattices, as well as Wilson fermions on quenched lattices. These methods can easily be extended to rho-to-gamma-pi transition form factors

  8. Bayesian Exploratory Factor Analysis

    Science.gov (United States)

    Conti, Gabriella; Frühwirth-Schnatter, Sylvia; Heckman, James J.; Piatek, Rémi

    2014-01-01

    This paper develops and applies a Bayesian approach to Exploratory Factor Analysis that improves on ad hoc classical approaches. Our framework relies on dedicated factor models and simultaneously determines the number of factors, the allocation of each measurement to a unique factor, and the corresponding factor loadings. Classical identification criteria are applied and integrated into our Bayesian procedure to generate models that are stable and clearly interpretable. A Monte Carlo study confirms the validity of the approach. The method is used to produce interpretable low dimensional aggregates from a high dimensional set of psychological measurements. PMID:25431517

  9. Algunos factores de riesgo asociados al recién nacido con bajo peso Some risk factors associated with the low birth weight infant

    Directory of Open Access Journals (Sweden)

    Nora María Pérez Guirado

    2005-08-01

    Full Text Available Se realizó un estudio observacional, analítico y con un modelo de diseño del tipo de casos y controles de toda las mujeres pertenecientes al área de salud del Policlínico Docente "Bernardo Posse", en el municipio San Miguel del Padrón, que tuvieron un recién nacido con un peso inferior a los 2 500 g en el período comprendido entre los años 1995 y 2004, conformada así la muestra estudio. De forma aleatoria se conformó un grupo control de mujeres con recién nacidos con peso superior o igual a los 2 500 g. Se aplicaron test estadísticos para la determinación del riesgo relativo, el Chi cuadrado y el intervalo de confianza del riesgo relativo de cada factor. En esta investigación quedó demostrado que la edad mayor de 35 años, la anemia, la urosepsis, la hipertensión arterial y las modificaciones cervicales son, entre otros, los antecedentes y riesgos que con más frecuencia aportaron a este indicador en nuestra área de salud. Se observó también la incidencia de los problemas nutricionales relacionados con la ganancia total de peso menor de 8 kg, la valoración nutricional de bajo peso, y el antecedente de recién nacido bajo peso al nacer.An observational analytical case and control study was conducted among all women from the health area of "Bernardo Posse" Teaching Polyclinic, in the municipality of San Miguel del Padrón, that had children with a weight under 2 500 g between 1995 and 2004 (study group. A control group composed of women with newborns with a weight equal to or over 2 500 g was selected at random. Statistical tests, such as Chi square test and the confidence interval of the relative risk of every factor, were applied to determine the relative risk. It was proved in this research that age over 35, anemia, urosepsis, arterial hypertension and the cervical modifications are, among others, the antecedents and risks that influenced the most on this indicator in our health area. It was also observed the incidence of

  10. Embarazo en la adolescencia y factores sociodemográficos en Guantánamo en 1998 Pregnancy in adolescence and sociodemographic factors in Guantánamo

    Directory of Open Access Journals (Sweden)

    Oscar Soto Martínez

    2004-02-01

    Full Text Available Se realizó un estudio de casos y controles con el objetivo de identificar factores de riesgo del embarazo en la adolescencia. Se estudiaron a todas las pacientes (37 con edades entre 12 y 19 años, pertenecientes al Policlínico "Emilio Daudinot", embarazadas en el año 1998 (casos y 37 adolescentes (controles que nunca han estado embarazadas, de igual área de salud y edades que los casos. Se aplicó un cuestionario a cada una de las adolescentes. Los datos se procesaron en SPSS 9.0. Estos se presentan en tablas y figuras donde se utilizan las medidas de resumen del nivel analítico. Se obtuvo la significación de la asociación mediante la prueba X2 de Mantell- Haenszel, en el que se prefijó el 95 % para el intervalo de confianza. A las variables significativas se les determinó el grado de asociación mediante el odds ratio. Resultaron significativas de forma bivariada el número de casamientos (OR 6,48 [2,39;15,56], la ocupación (OR 6,13 [2,05;14,23], el estado civil (OR 2,13 [1,26;3,86].A case-control study was conducted aimed at identifying the risk factors of pregnancy in adolescence. All the patients aged 12-19 (37 from "Emilio Daudinot" Polyclinic that got pregnant in 1998 and 37 adolescents (controls who have never been pregnant with the same age and from the same area were studied. Every adolescent answered a questionnaire. Ddata were processed in SPSS 9.0 and they were shown in tables and figures where the summary measures of the analytical level were used. The association significance was obtained by Mantell-Haenszel X2 test, in which 95 % was prefixed as the confidence interval. The association degree was determined in the significant variables by the odds ratio. The number of marriages (OR 6,48 [2,39;15,56], the occupation (OR 6,13 [2,05;14,23], and the marital status (OR 2,13 [1,26;3,86] proved to be significant in a bivariated way.

  11. demographic factors associated factors associated with malaria ...

    African Journals Online (AJOL)

    userpc

    .8%) than those in other nce of 35.4% which was actors can predispose alence of malaria in a study were significantly eveloping guidelines and more effective disease endemic areas (Bashar et therefore attempts to rmation on possible demographic factors d out in four selected geria; Major Ibrahim B. Hospital Zaria, Hajiya.

  12. Prevalencia y factores asociados a macrosomía en Perú, 2013

    Directory of Open Access Journals (Sweden)

    Antonio José Ledo Alves da Cunha

    Full Text Available Objetivos. Determinar la prevalencia de macrosomía y factores asociados en Perú, y describir la ocurrencia de complicaciones durante el parto y posparto. Materiales y métodos. Los pesos al nacer de los niños menores de cinco años fueron analizados usando datos de la Encuesta Demográfica y de Salud Familiar (ENDES 2013, llevada a cabo por el Instituto Nacional de Estadística e Informática. Los niños con un peso mayor a 4000 g al nacer fueron considerados como macrosómicos. Se empleó un análisis de regresión logística para establecer la asociación independiente de factores sociodemográficos con la macrosomía. Resultados. La muestra estuvo constituida por 6121 niños. La prevalencia de macrosomía fue 5,3% (intervalo de confianza al 95%: 4,8 a 5,9. El sexo masculino, un orden de nacimiento mayor, la obesidad materna y una mayor estatura materna estuvieron independientemente asociados con la macrosomía. Los partos por cesárea fueron más frecuentes en niños macrosómicos (43,9% vs 26,9%. Las complicaciones durante el parto y posparto fueron frecuentes, pero no estadísticamente asociadas con la macrosomía. Conclusiones. La prevalencia de macrosomía en Perú es relativamente baja comparada con otros países de ingresos bajos o medios. Los factores asociados con la macrosomía fueron principalmente no modificables, con excepción de la obesidad materna. Los niños macrosómicos nacieron más frecuentemente por cesárea. La reducción del peso y la prevención de la obesidad en mujeres en edad fértil en Perú podrían potencialmente reducir la macrosomía y las tasas de cesáreas.

  13. Edad avanzada y factores de riesgo para infarto agudo de miocardio

    Directory of Open Access Journals (Sweden)

    M. A. Ciruzzi

    2002-12-01

    Full Text Available Este estudio caso-control analizó en los sujetos añosos el rol de los factores de riesgo coronario en el desarrollo del infarto agudo de miocardio (IAM, estableció la naturaleza de esta asociación y el grado de riesgo. Los datos fueron obtenidos en una investigación que incluyó 1060 casos y 1071 controles, realizada en 35 unidades coronarias de centros médicos de Argentina entre noviembre de 1991 y agosto de 1994. Nuestro análisis se basó en la información de los sujetos mayores de 65 años. Los casos fueron 427 pacientes con un primer IAM. Los controles fueron 396 sujetos sin evidencias clinicas de enfermedad cardiovascular, seleccionados en los mismos centros que los casos. Los Odds Ratios (OR y su intervalo de confianza del 95% (IC 95% se obtuvieron mediante un análisis de regresión logística, incluyendo variables como la edad, educación, clase social, tabaquismo, antecedente de diabetes o hipertensión arterial, índice de masa corporal e historia familiar de enfermedad coronaria. Los factores de riesgo relacionados independientemente con IAM fueron los siguientes: hipercolesterolemia (colesterol sérico > 240 mg/dl: OR=1.76 (IC 95%: 1.25-2.49, tabaquismo: OR=1.6 (IC 95%: 1.06-2.4, hipertensión arterial: OR=2.05 (IC 95%: 1.51-2.73, diabetes OR=1.71 (IC 95%: 1.12-2.70, historia de un familiar con enfermedad coronaria: OR=1.36 (IC 95%: 0.93-1.97 y de dos o más familiares: OR=2.63 (IC 95%: 1.21-5.71. Este estudio, confirma en los sujetos de edad avanzada la importancia de la hipercolesterolemia, del tabaquismo, la hipertesión arterial, la diabetes y la historia familiar de enfermedad coronaria como factores de riesgo de IAM

  14. Sparse Exploratory Factor Analysis.

    Science.gov (United States)

    Trendafilov, Nickolay T; Fontanella, Sara; Adachi, Kohei

    2017-07-13

    Sparse principal component analysis is a very active research area in the last decade. It produces component loadings with many zero entries which facilitates their interpretation and helps avoid redundant variables. The classic factor analysis is another popular dimension reduction technique which shares similar interpretation problems and could greatly benefit from sparse solutions. Unfortunately, there are very few works considering sparse versions of the classic factor analysis. Our goal is to contribute further in this direction. We revisit the most popular procedures for exploratory factor analysis, maximum likelihood and least squares. Sparse factor loadings are obtained for them by, first, adopting a special reparameterization and, second, by introducing additional [Formula: see text]-norm penalties into the standard factor analysis problems. As a result, we propose sparse versions of the major factor analysis procedures. We illustrate the developed algorithms on well-known psychometric problems. Our sparse solutions are critically compared to ones obtained by other existing methods.

  15. Factores de riesgo de mortalidad en personas mayores de 65 años internadas en un hospital universitario, São Paulo, Brasil

    Directory of Open Access Journals (Sweden)

    Sandro J. Martins

    1999-06-01

    Full Text Available Diversos estudios muestran que la edad en sí no es un factor independiente predictor de la supervivencia de las personas mayores gravemente enfermas, pero el grupo mayor de 65 años de edad no suele tener acceso a los recursos diagnósticos y terapéuticos más complejos. Con el continuo envejecimiento de la población se hace cada vez más importante poder determinar los factores de riesgo de mortalidad que afectan a las posibilidades de supervivencia de la gente mayor hospitalizada, especialmente en condiciones de urgencia. El objetivo de este trabajo fue analizar los factores de riesgo asociados con la mortalidad de personas mayores de 65 años internadas en el Servicio de Urgencia del hospital Santa Casa de São Paulo, institución académica de nivel terciario. El estudio se basó en un análisis por regresión logística no condicional de los datos personales recogidos en el hospital en las historias clínicas respectivas y otros documentos pertenecientes a los pacientes hospitalizados durante el período de julio de 1993 a marzo de 1994, inclusive. Durante dicho período se hospitalizó a 599 pacientes -326 hombres (54,4% y 273 mujeres (45,6%- con una mediana de edad de 73,3 años. Las razones principales de internamiento fueron neumonía (14,4%, enfermedad cerebrovascular (11,5% e insuficiencia cardíaca (8,2%. El total de defunciones ascendió a 160. Los pacientes que fallecieron tuvieron una estadía mediana en el hospital de 4 días (intervalo de 1 a 72, semejante a la de los que sobrevivieron (3 días; intervalo de 0 a 35 días; P = 0,29. Según el análisis multivariado, independientemente del sexo, la edad, la raza, la observancia del tratamiento, el diagnóstico inicial y otros estados patológicos presentes, la hipertensión arterial (razón de posibilidades, RP u odds ratio en inglés = 0,39, IC95%: 0,23 a 0,68, la enfermedad pulmonar obstructiva crónica (RP = 0,45; IC95%: 0,22 a 0,95 y la diabetes mellitus (RP = 0,50; IC95

  16. New thrombopoietic growth factors

    OpenAIRE

    Kuter, David J.

    2007-01-01

    Although development of first-generation thrombopoietic growth factors (recombinant human thrombopoietin [TPO] and pegylated recombinant human megakaryocyte growth and development factor [PEG-rHuMGDF]) was stopped due to development of antibodies to PEG-rHuMGDF, nonimmunogenic second-generation thrombopoietic growth factors with unique pharmacologic properties have been developed. TPO peptide mimetics contain TPO receptor-activating peptides inserted into complementarity-determining regions o...

  17. Factores asociados con la aparición de disfunciones sexuales en una población femenina

    Directory of Open Access Journals (Sweden)

    Wilfredo Guibert Reyes

    1998-02-01

    Full Text Available Se realiza un estudio explicativo para determinar la frecuencia de las disfunciones sexuales y algunos de los factores biológicos, psicosociales, culturales y ambientales asociados con la aparición de éstas en el período de 1 año, a partir de agosto de 1993 en Alamar. Se expresa que la muestra está compuesta por 48 mujeres mayores de 15 años, un grupo de estudio de 24, e igual cantidad de controles. Se les aplica una encuesta de 30 preguntas, cuyos resultados se muestran en 5 tablas y se utiliza el cálculo porcentual para estimar la frecuencia y odds ratio con intervalo de confianza al 95 %, para valorar fuerza de asociación entre las variables. Se encuentra que las difunciones sexuales femeninas de mayor frecuencia son el deseo sexual inhibido y la anorgasmia, que las variables ingestión de fármacos, ausencia de salud física, poco deseo sexual, comunicación deficiente de pareja y no recibir educación sexual, son factores de riesgo que están fuertemente asociados con la aparición de disfunciones sexuales en nuestras mujeres y tienen relación causal con ellas. Se señala que los factores ambientales no se asocian con la aparición de disfunciones sexualesAn explanatory study was conducted to determine the frequency of sexual dysfunctions and some of the biological, psychosocial, cultural and environmental factors associated with the appearance of these disorders from August, 1993, to August, 1994, in Alamar. The sample was composed of 48 women over 15, a case-base study consisting of 24 women, and the same number of controls. A survey with 30 questions was applied and the results were shown in 5 tables. Percentage was calculated to estimate the frequency and odds ratio with a confidence interval at 95 % so as to assess the force of association among the variables. It was found that the most frequent female sexual dysfunctions are the inhibited sexual desire and the anorgasmy, and that drug taking, the absence of physical health

  18. Factores individuales y familiares asociados con sintomatología depresiva en adolescentes de escuelas públicas de México

    Directory of Open Access Journals (Sweden)

    Leonor Rivera-Rivera

    2015-05-01

    Full Text Available Objetivo. Estimar la prevalencia de sintomatología depresiva y explorar su asociación con factores individuales y familiares en estudiantes de escuelas públicas de nivel medio superior en México. Material y métodos. Estudio transversal con muestra representativa de 9 982 estudiantes de 14 a 19 años. Se estimaron modelos de regresión logística para obtener razones de momios (RM, con intervalos de confianza a 95% (IC95%. Resultados. El 27% de los estudiantes presentó sintomatología depresiva; la proporción fue mayor en mujeres (34% que en hombres (18%. Factores asociados: sexo femenino (RM=2.25 IC95% 1.86-2.71; baja autoestima (RM=2.77 IC95% 2.41-3.19; consumo de alcohol (RM=1.72 IC95% 1.46-2.02; consumo de tabaco (RM=1.57 IC95% 1.31-1.88; consumo de drogas (RM=1.63 IC95% 1.29-2.05; violencia intrafamiliar (RM=2.05 IC95% 1.77-2.39; baja comunicación padres e hijos (RM=1.78 IC95% 1.59-2.00. Conclusiones. La sintomatología depresiva en estudiantes de nivel medio superior es un problema de salud pública en México. Se requiere la implementación de programas de intervención enfocados en el manejo de factores de riesgo asociados.

  19. The Transcription Factor Encyclopedia

    NARCIS (Netherlands)

    Yusuf, Dimas; Butland, Stefanie L.; Swanson, Magdalena I.; Bolotin, Eugene; Ticoll, Amy; Cheung, Warren A.; Zhang, Xiao Yu Cindy; Dickman, Christopher T. D.; Fulton, Debra L.; Lim, Jonathan S.; Schnabl, Jake M.; Ramos, Oscar H. P.; Vasseur-Cognet, Mireille; de Leeuw, Charles N.; Simpson, Elizabeth M.; Ryffel, Gerhart U.; Lam, Eric W.-F.; Kist, Ralf; Wilson, Miranda S. C.; Marco-Ferreres, Raquel; Brosens, Jan J.; Beccari, Leonardo L.; Bovolenta, Paola; Benayoun, Bérénice A.; Monteiro, Lara J.; Schwenen, Helma D. C.; Grontved, Lars; Wederell, Elizabeth; Mandrup, Susanne; Veitia, Reiner A.; Chakravarthy, Harini; Hoodless, Pamela A.; Mancarelli, M. Michela; Torbett, Bruce E.; Banham, Alison H.; Reddy, Sekhar P.; Cullum, Rebecca L.; Liedtke, Michaela; Tschan, Mario P.; Vaz, Michelle; Rizzino, Angie; Zannini, Mariastella; Frietze, Seth; Farnham, Peggy J.; Eijkelenboom, Astrid; Brown, Philip J.; Laperrière, David; Leprince, Dominique; de Cristofaro, Tiziana; Prince, Kelly L.; Putker, Marrit; del Peso, Luis; Camenisch, Gieri; Wenger, Roland H.; Mikula, Michal; Rozendaal, Marieke; Mader, Sylvie; Ostrowski, Jerzy; Rhodes, Simon J.; van Rechem, Capucine; Boulay, Gaylor; Olechnowicz, Sam W. Z.; Breslin, Mary B.; Lan, Michael S.; Nanan, Kyster K.; Wegner, Michael; Hou, Juan; Mullen, Rachel D.; Colvin, Stephanie C.; Noy, Peter John; Webb, Carol F.; Witek, Matthew E.; Ferrell, Scott; Daniel, Juliet M.; Park, Jason; Waldman, Scott A.; Peet, Daniel J.; Taggart, Michael; Jayaraman, Padma-Sheela; Karrich, Julien J.; Blom, Bianca; Vesuna, Farhad; O'Geen, Henriette; Sun, Yunfu; Gronostajski, Richard M.; Woodcroft, Mark W.; Hough, Margaret R.; Chen, Edwin; Europe-Finner, G. Nicholas; Karolczak-Bayatti, Magdalena; Bailey, Jarrod; Hankinson, Oliver; Raman, Venu; Lebrun, David P.; Biswal, Shyam; Harvey, Christopher J.; Debruyne, Jason P.; Hogenesch, John B.; Hevner, Robert F.; Héligon, Christophe; Luo, Xin M.; Blank, Marissa Cathleen; Millen, Kathleen Joyce; Sharlin, David S.; Forrest, Douglas; Dahlman-Wright, Karin; Zhao, Chunyan; Mishima, Yuriko; Sinha, Satrajit; Chakrabarti, Rumela; Portales-Casamar, Elodie; Sladek, Frances M.; Bradley, Philip H.; Wasserman, Wyeth W.

    2012-01-01

    Here we present the Transcription Factor Encyclopedia (TFe), a new web-based compendium of mini review articles on transcription factors (TFs) that is founded on the principles of open access and collaboration. Our consortium of over 100 researchers has collectively contributed over 130 mini review

  20. Factors affecting nuclear development

    International Nuclear Information System (INIS)

    Stevens, G.H.; Girouard, P.

    1995-01-01

    Among the factors affecting nuclear development, some depend more or less on public authorities, but many are out of public authorities control (foreign policies, market and deregulation, socials and environmental impacts, public opinion). As far as possible, the following study tries to identify those factors. (D.L.). 2 photos

  1. [Vulnerability factors to depression].

    Science.gov (United States)

    Bugán, Antal; Margitics, Ferenc; Pauwlik, Zsuzsa

    2006-01-01

    The objective of this study is to reveal in their complexity the biological and cognitive vulnerability factors, as well as the environmental and socialisation predisposing factors playing a role in the development of depression in non-clinical sample of subjects (college students). Biological vulnerability was examined through temperament and character features, cognitive vulnerability was examined through dysfunctional attitudes, attributional style and coping strategies, and environmental, socialization predisposing factors were observed through certain family socialisation effects (type of family atmosphere, educational objectives, educational and rearing attitudes and style) and parental rearing behaviour. 681 college students were involved in this study (465 females, 216 males). Students were assigned to the study group if they fell in the fourth quartile of the sample based on the results obtained by the Beck's Depression Inventory: 170 persons (128 females, 42 males). Students who fell in the first quartile of the sample on the basis of their results obtained by the mentioned Inventory formed the control group: 204 persons (118 females, 86 males). The results of our study have demonstrated that in a sub-clinical sample the lack of parental care was observed to be a socialization predisposing factor in the development of depression, while certain dysfunctional attitudes and pessimistic interpretation styles were detected to be cognitive vulnerability factors, and harm avoidance proved to be a biological vulnerability factor. We also managed to reveal the effects of certain background factors, which produce their influence indirectly through mediating factors.

  2. Rh Factor Blood Test

    Science.gov (United States)

    Rh factor blood test Overview Rhesus (Rh) factor is an inherited protein found on the surface of red blood cells. If your ... Rh negative, you might need to have another blood test — an antibody screen — during your first trimester and ...

  3. Respirator field performance factors

    International Nuclear Information System (INIS)

    Skaggs, B.J.; DeField, J.D.; Strandberg, S.W.; Sutcliffe, C.R.

    1985-01-01

    The Industrial Hygiene Group assisted OSHA and the NRC in measurements of respirator performance under field conditions. They reviewed problems associated with sampling aerosols within the respirator in order to determine fit factors (FFs) or field performance factor (FPF). In addition, they designed an environmental chamber study to determine the effects of temperature and humidity on a respirator wearer

  4. Factores asociados a la aceptación de salpingoclasia posparto entre mujeres infectadas por el VIH Factors associated with acceptance of postpartum tubal ligation among HIV infected women

    Directory of Open Access Journals (Sweden)

    Ricardo Figueroa-Damián

    2001-04-01

    Full Text Available OBJETIVO: Identificar los factores asociados a la aceptación de salpingoclasia entre mujeres infectadas por el virus de inmunodeficiencia humana (VIH, después de finalizar su embarazo. MATERIAL Y MÉTODOS: Se realizó un estudio de casos y controles con 72 pacientes embarazadas seropositivas al VIH, en el Instituto Nacional de Perinatología (INPer, entre marzo de 1988 y febrero de 1999. Se consideraron casos a 49 mujeres que al finalizar el embarazo aceptaron la realización de salpingoclasia, 23 pacientes que rechazaron este procedimiento conformaron los controles. En cada paciente se investigaron antecedentes demográficos, historia sexual y reproductiva y condiciones relacionadas con la infección por el VIH. Se realizó estadística descriptiva, las variables categóricas se compararon con ji² o prueba exacta de Fisher y las continuas con t de Student, se hizo cálculo de razón de momios (RM, con intervalo de confianza al 95% y se realizó análisis estratificado mediante ji² de Mantel Haenszel para variables potencialmente confusoras. RESULTADOS: La edad promedio de las pacientes seropositivas fue de 25.5 ± 5.5 años. Estas ingresaron al hospital con una mediana de 27 semanas de gestación (intervalo de 7 a 40 semanas; 16 (22.2% no tuvieron control prenatal en el INPer. La mediana de tiempo de conocerse infectadas fue de nueve meses (intervalo 1 a 108. Las variables que se asociaron con la aceptación de salpingoclasia fueron: el antecedente de hijos previos, con una RM de 11.1 (IC 95% 3.4 a 36; la atención a partir del año de 1995, con una RM de 4.7 (IC 95% 1.7 a 13.3 y el tener cuando menos un hijo previo infectado, con una RM de 4.6 (IC 95% 1.1 a 23.1. El análisis estratificado no mostró modificación en la fuerza de asociación de estas variables con la aceptación de salpingoclasia. CONCLUSIONES: El tener hijos previos fue el factor que más influyó en la aceptación de salpingoclasia. El texto completo en inglés de este

  5. Exploratory Bi-Factor Analysis

    Science.gov (United States)

    Jennrich, Robert I.; Bentler, Peter M.

    2011-01-01

    Bi-factor analysis is a form of confirmatory factor analysis originally introduced by Holzinger. The bi-factor model has a general factor and a number of group factors. The purpose of this article is to introduce an exploratory form of bi-factor analysis. An advantage of using exploratory bi-factor analysis is that one need not provide a specific…

  6. Alteraciones osteomusculares asociadas a factores físicos y ambientales en estudiantes de odontología Musculoskeletal alterations associated factors physical and environmental in dental students

    Directory of Open Access Journals (Sweden)

    Juntzo Fals Martínez

    2012-12-01

    Full Text Available OBJETIVO: Describir las alteraciones osteomusculares y su asociación con factores físicos y ambientales en estudiantes de odontología. MÉTODOS: Estudio analítico de corte transversal. Se realizó muestreo aleatorio simple por fijación proporcional de acuerdo al ciclo académico cursado, seleccionado una muestra de 182 estudiantes. La recolección de la información de las exposiciones físicas, ambientales relacionadas con la práctica clínica odontológica y diferentes a estas fueron valoradas mediante un cuestionario validado tipo encuesta estructurada. La valoración muscular se realizó mediante un análisis visual con el Scan-test. Para los factores relacionados con la posición de trabajo, se utilizó el instrumento RULA. Para el análisis bivariable se utilizaron las razones de disparidad con intervalos de confianza del 95%. Para el análisis multivariable se utilizó la regresión logística nominal. RESULTADOS: El 58,2% de los estudiantes presentaron dolor a la palpación en trapecio superior y el 45,6% en zona cervical. En los movimientos de lateralidad cervical se encontró dolor en un 35,7%, junto con el de flexión cervical en 35,1%. La prevalencia de dolor estuvo relacionada con factores propios de la práctica clínica odontológica y no hubo relación con otros factores externos. CONCLUSIONES: La aparición de dolor muscular en esta población está influida por múltiples variables, la mayoría de éstas, relacionadas con la práctica odontológica de los estudiantes, las cuales al interactuar entre sí pueden desencadenar sintomatología a nivel de espalda y cuello.OBJECTIVE: To describe the musculoskeletal disorders and association with physical and environmental in students of Dentistry. METHODS: Cross sectional study. Simple random sampling was conducted obtaining a proportional sample of 182 students per semester. Collecting information from physical and environmental exposures related to different clinical practice

  7. Violencia física marital en Barranquilla (Colombia: prevalencia y factores de riesgo

    Directory of Open Access Journals (Sweden)

    Tuesca R.

    2003-01-01

    Full Text Available Objetivos: Determinar la prevalencia de maltrato físico marital en mujeres en edad fértil que viven con su pareja, así como identificar factores personales, socioeconómicos y de función familiar que se relacionen con el maltrato. Métodos: Estudio transversal sobre una muestra aleatoria de 275 mujeres en edad fértil del barrio Carlos Meissel, de la ciudad de Barranquilla, Colombia. La información se obtuvo mediante entrevista personal en el hogar a partir de un cuestionario estructurado y siguiendo las recomendaciones éticas y de seguridad para la investigación sobre violencia doméstica contra mujeres de la Organización Mundial de la Salud. En el cuestionario se recogen datos sobre características personales, consumo habitual de alcohol y drogas, función familiar (según test de Apgar Familiar, características socioeconómicas y antecedentes de maltrato físico durante los 12 meses previos a la entrevista. Resultados: La prevalencia de maltrato marital fue del 22,9%, y el grupo de 25-29 años es el más afectado (33,3%. Se asociaron con el maltrato físico el consumo habitual de alcohol en las mujeres (odds ratio, OR = 6,02; intervalo de confianza del 95%, IC del 95%, 1,7-22,2 y en el cónyuge (OR = 10,11; IC del 95%, 5,1-20,1 y el consumo de sustancias psicoactivas en el cónyuge (OR = 11.01; IC del 95%, 4,2-29,5. Los ingresos mensuales por debajo de 300.000 pesos colombianos (140 euros también se asociaron con maltrato, así como presencia de disfunción familiar moderada o grave (OR = 16,9; IC del 95%, 4,8-59,0; OR = 81,6; IC del 95%, 18,8-35,5, respectivamente. Conclusiones: La naturaleza transversal del estudio limita la interpretación de los resultados. Sin embargo, se ha observado que en las mujeres de la muestra estudiada en este estudio el maltrato físico de la mujer por parte de su pareja se asocia con factores potencialmente modificables.

  8. Risk factors associated to hospital mortality in patients with acute kidney injury on hemodialysis

    Directory of Open Access Journals (Sweden)

    Mariela Alejandra Linares-Linares

    2017-03-01

    Full Text Available Resumen INTRODUCCIÓN La incidencia de insuficiencia renal aguda a nivel mundial es 18% y la mortalidad intrahospitalaria puede alcanzar más del 50%. En Perú, existen escasos estudios acerca de la mortalidad en pacientes con insuficiencia renal aguda en hemodiálisis. OBJETIVOS Identificar los factores de riesgo asociados a mortalidad intrahospitalaria en pacientes con insuficiencia renal aguda en hemodiálisis. MÉTODOS Es una cohorte retrospectiva, en la cual se estudió a los pacientes con insuficiencia renal aguda en hemodiálisis en el Hospital Nacional Edgardo Rebagliati Martins entre enero de 2013 y diciembre de 2015. Se halló un tamaño de muestra de 154 pacientes con una potencia de 80%, y un intervalo de confianza de 95%. Se utilizaron los códigos de la Clasificación Internacional de Enfermedades-10 para identificar las historias clínicas de pacientes con insuficiencia renal aguda (N.17 y hemodiálisis (Z.49. La variable independiente fue oliguria y la variable dependiente fue mortalidad intrahospitalaria. Para el análisis multivariado, se utilizó regresión de Poisson. RESULTADOS El universo fue de 285 pacientes. Se revisaron 212 historias clínicas y se excluyeron 44. De las 168 historias clínicas estudiadas, 129 pertenecían a pacientes vivos y 39 a fallecidos. La incidencia de mortalidad fue de 17,2%. Las principales causas de insuficiencia renal aguda en hemodiálisis fueron sepsis (39,2% y deshidratación severa (10,8%. En el modelo ajustado, los factores de riesgo asociados a mortalidad intrahospitalaria de insuficiencia renal aguda en hemodiálisis fueron lactato (riesgo relativo 1,09, potasio (riesgo relativo 0,93, y presión arterial media (riesgo relativo 0,97. CONCLUSIONES El lactato es un parámetro objetivo que permite predecir el pronóstico y contribuye a un mejor manejo de los pacientes con insuficiencia renal aguda en hemodiálisis.

  9. Intervening factors for the initiation of treatment of patients with stomach and colorectal cancer.

    Science.gov (United States)

    Valle, Thaína Dalla; Turrini, Ruth Natalia Teresa; Poveda, Vanessa de Brito

    2017-05-15

    to identify the time between symptoms, the request for care and the beginning of treatment in patients with stomach and colorectal cancer as well as the factors that interfere in these processes. correlational descriptive study, including 101 patients diagnosed with stomach or colorectal cancer, treated in a hospital specialized in oncology. the 101 patients investigated there was predominance of males, mean age of 61.7 years. The search for medical care occurred within 30 days after the onset of symptoms, in most cases. The mean total time between the onset of symptoms and the beginning of treatment ranged from 15 to 16 months, and the mean time between the search for medical care and the diagnosis was 4.78 months. The family history of cancer (p=0.008) and the implementation of preventive follow-up (pel tiempo entre los síntomas, la búsqueda de asistencia y el inicio del tratamiento en pacientes con cáncer gástrico y colorrectal y los factores que interfieren en estos procesos. estudio descriptivo correlacional, incluyendo 101 pacientes con diagnostico de cáncer gástrico o colorrectal, atendidos en un hospital especializado en oncología. de 101 pacientes investigados la mayoria eran hombres, con edad media de 61,7 años. La búsqueda de la atención médica se produjo dentro de los 30 días después de la aparición de los síntomas, en la mayoría de los casos. El promedio de tiempo total entre el inicio de los síntomas y el inicio del tratamiento fue de 15,16 meses y el tiempo medio entre la búsqueda de la atención médica y el diagnóstico fue de 4,78 meses. La historia familiar de cáncer (p=0,008) y la realización de seguimiento preventivo (pel tratamiento temprano. Náuseas, vómitos, hematoquecia, pérdida de peso y dolor se asociaron con la búsqueda más rápida de la asistencia. el intervalo más largo entre la búsqueda de la atención médica y el diagnóstico se produjo posiblemente por asociación negativa entre los síntomas que se

  10. Fatores de risco para peritonites e internações Risk factors for peritonitis and hospitalizations

    Directory of Open Access Journals (Sweden)

    Sarah Silva Abrahão

    2010-03-01

    Full Text Available INTRODUÇÃO: Investigou-se um universo de 30 crianças e adolescentes portadores de doença renal crônica em tratamento dialítico, assistidos pelo Hospital das Clínicas da UFMG, a fim de determinar fatores de risco para a frequência de peritonites e de internações. MÉTODO: Estudo descritivo em que para a obtenção dos resultados utilizou-se o software SPSS (Statistical Package for Social Science versão 13.0. Testaram-se as variáveis: baixa escolaridade, baixa renda familiar, nível de informação inadequado, inadequação da antissepsia das mãos para a realização da diálise, ausência de pia no quarto da diálise como fator de risco para maior frequência de peritonites e internações. RESULTADOS: Os valores de Odds Ratio estiveram dentro dos limites dos intervalos de confiança (95% e em alguns casos foram INTRODUCTION: This study assessed 30 children and adolescents with chronic kidney disease on dialysis, cared for at the Hospital das Clínicas of UFMG, aiming at determining the risk factors for the frequency of peritonitis and hospitalizations. METHOD: Descriptive study using the SPSS (Statistical Package for Social Science software, version 13.0. The following variables were assessed as risk factors for a higher frequency of peritonitis and hospitalizations: low educational level; low family income; inadequate level of information; inadequate hand antisepsis during PD; and lack of a sink in the dialysis room. RESULTS: The odds ratio values were within the 95% confidence intervals, and, in some cases, were smaller than 1, indicating the possibility of a negative association between some independent variables and the variables studied, but with no statistically significant difference. CONCLUSION: No statistical significance was observed for the variables studied, despite the tendency towards that.

  11. Factor V Leiden thrombophilia.

    Science.gov (United States)

    Kujovich, Jody Lynn

    2011-01-01

    Factor V Leiden is a genetic disorder characterized by a poor anticoagulant response to activated Protein C and an increased risk for venous thromboembolism. Deep venous thrombosis and pulmonary embolism are the most common manifestations, but thrombosis in unusual locations also occurs. The current evidence suggests that the mutation has at most a modest effect on recurrence risk after initial treatment of a first venous thromboembolism. Factor V Leiden is also associated with a 2- to 3-fold increased relative risk for pregnancy loss and possibly other obstetric complications, although the probability of a successful pregnancy outcome is high. The clinical expression of Factor V Leiden is influenced by the number of Factor V Leiden alleles, coexisting genetic and acquired thrombophilic disorders, and circumstantial risk factors. Diagnosis requires the activated Protein C resistance assay (a coagulation screening test) or DNA analysis of the F5 gene, which encodes the Factor V protein. The first acute thrombosis is treated according to standard guidelines. Decisions regarding the optimal duration of anticoagulation are based on an individualized assessment of the risks for venous thromboembolism recurrence and anticoagulant-related bleeding. In the absence of a history of thrombosis, long-term anticoagulation is not routinely recommended for asymptomatic Factor V Leiden heterozygotes, although prophylactic anticoagulation may be considered in high-risk clinical settings. In the absence of evidence that early diagnosis reduces morbidity or mortality, decisions regarding testing at-risk family members should be made on an individual basis.

  12. Recombinant clotting factors.

    Science.gov (United States)

    Pipe, Steven W

    2008-05-01

    The recombinant era for haemophilia began in the early 1980s with the cloning and subsequent expression of functional proteins for both factors VIII and IX. Efficient production of recombinant clotting factors in mammalian cell culture systems required overcoming significant challenges due to the complex post-translational modifications that were integral to their pro-coagulant function. The quick development and commercialization of recombinant clotting factors was, in part, facilitated by the catastrophic impact of viral contamination of plasma-derived clotting factor concentrates at the time. Since their transition into the clinic, the recombinant versions of both factor VIII and IX have proven to be remarkable facsimiles of their plasma-derived counterparts. The broad adoption of recombinant therapy throughout the developed world has significantly increased the supply of clotting factor concentrates and helped advance aggressive therapeutic interventions such as prophylaxis. The development of recombinant VIIa was a further advance bringing a recombinant option to haemophilia patients with inhibitors. Recombinant DNA technology remains the platform to address ongoing challenges in haemophilia care such as reducing the costs of therapy, increasing the availability to the developing world, and improving the functional properties of these proteins. In turn, the ongoing development of new recombinant clotting factor concentrates is providing alternatives for patients with other inherited bleeding disorders.

  13. Factorized Graph Matching.

    Science.gov (United States)

    Zhou, Feng; de la Torre, Fernando

    2015-11-19

    Graph matching (GM) is a fundamental problem in computer science, and it plays a central role to solve correspondence problems in computer vision. GM problems that incorporate pairwise constraints can be formulated as a quadratic assignment problem (QAP). Although widely used, solving the correspondence problem through GM has two main limitations: (1) the QAP is NP-hard and difficult to approximate; (2) GM algorithms do not incorporate geometric constraints between nodes that are natural in computer vision problems. To address aforementioned problems, this paper proposes factorized graph matching (FGM). FGM factorizes the large pairwise affinity matrix into smaller matrices that encode the local structure of each graph and the pairwise affinity between edges. Four are the benefits that follow from this factorization: (1) There is no need to compute the costly (in space and time) pairwise affinity matrix; (2) The factorization allows the use of a path-following optimization algorithm, that leads to improved optimization strategies and matching performance; (3) Given the factorization, it becomes straight-forward to incorporate geometric transformations (rigid and non-rigid) to the GM problem. (4) Using a matrix formulation for the GM problem and the factorization, it is easy to reveal commonalities and differences between different GM methods. The factorization also provides a clean connection with other matching algorithms such as iterative closest point; Experimental results on synthetic and real databases illustrate how FGM outperforms state-of-the-art algorithms for GM. The code is available at http://humansensing.cs.cmu.edu/fgm.

  14. [Human factors in medicine].

    Science.gov (United States)

    Lazarovici, M; Trentzsch, H; Prückner, S

    2017-01-01

    The concept of human factors is commonly used in the context of patient safety and medical errors, all too often ambiguously. In actual fact, the term comprises a wide range of meanings from human-machine interfaces through human performance and limitations up to the point of working process design; however, human factors prevail as a substantial cause of error in complex systems. This article presents the full range of the term human factors from the (emergency) medical perspective. Based on the so-called Swiss cheese model by Reason, we explain the different types of error, what promotes their emergence and on which level of the model error prevention can be initiated.

  15. Two-factor authentication

    CERN Document Server

    Stanislav, Mark

    2015-01-01

    During the book, readers will learn about the various technical methods by which two-factor authentication is implemented, security concerns with each type of implementation, and contextual details to frame why and when these technologies should be used. Readers will also be provided with insight about the reasons that two-factor authentication is a critical security control, events in history that have been important to prove why organization and individual would want to use two factor, and core milestones in the progress of growing the market.

  16. Rh Factor Blood Test

    Science.gov (United States)

    ... June 3, 2015. Rh factor blood test About Advertisement Mayo Clinic does not endorse companies or products. ... a Job Site Map About This Site Twitter Facebook Google YouTube Pinterest Mayo Clinic is a not- ...

  17. Shell Buckling Knockdown Factors

    Data.gov (United States)

    National Aeronautics and Space Administration — The Shell Buckling Knockdown Factor (SBKF) Project, NASA Engineering and Safety Center (NESC) Assessment #: 07-010-E, was established in March of 2007 by the NESC in...

  18. Risk factors for neoplasms

    International Nuclear Information System (INIS)

    Brachner, A.; Grosche, B.

    1991-06-01

    A broad survey is given of risk factors for neoplasms. The main carcinogenic substances (including also ionizing radiation and air pollution) are listed, and are correlated with the risk factors for various cancers most frequently explained and discussed in the literature. The study is intended to serve as a basis for a general assessment of the incidence of neoplasms in children, and of cancer mortality in the entire population of Bavaria in the years 1983-1989, or 1979-1988, respectively, with the principal idea of drawing up an environment-related health survey. The study therefore takes into account not only ionizing radiation as a main risk factor, but also other risk factors detectable within the ecologic context, as e.g. industrial installations and their effects, refuse incineration plants or waste dumps, or the social status. (orig./MG) [de

  19. [Risk factors of schizophrenia].

    Science.gov (United States)

    Suvisaari, Jaana

    2010-01-01

    Schizophrenia is a multifactorial, neurodevelopmental disorder caused by a combination of genetic and environmental risk factors. Disturbances of brain development begin prenatally, while different environmental insults further affect postnatal brain maturation during childhood and adolescence. Genome-wide association studies (GWAS) have succeeded in identifying hundreds of new risk variants for common, multifactorial diseases. In schizophrenia research, GWAS have found several rare copy number variants that considerably increase the risk of schizophrenia, and have shown an association between schizophrenia and the major histocompatibility complex. Research on environmental risk factors in recent years has provided new information particularly on risk factors related to pregnancy and childhood rearing environment. Gene-environment interactions have become a central research topic. There is evidence that genetically susceptible children are more vulnerable to the effects of unstable childhood rearing environment and other environmental risk factors.

  20. Human Factors Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — Purpose: The purpose of the Human Factors Laboratory is to further the understanding of highway user needs so that those needs can be incorporated in roadway design,...

  1. Trespass event risk factors.

    Science.gov (United States)

    2014-11-12

    The Volpe Center has used three sources of datathe Federal Railroad Administrations required accident reports, locomotive video, and U.S. Census datato investigate common risk factors for railroad trespassing incidents, the leading cause of ...

  2. Human factors in aviation

    National Research Council Canada - National Science Library

    Salas, Eduardo; Maurino, Daniel E

    2010-01-01

    .... HFA offers a comprehensive overview of the topic, taking readers from the general to the specific, first covering broad issues, then the more specific topics of pilot performance, human factors...

  3. Factors Affecting Wound Healing

    Science.gov (United States)

    Guo, S.; DiPietro, L.A.

    2010-01-01

    Wound healing, as a normal biological process in the human body, is achieved through four precisely and highly programmed phases: hemostasis, inflammation, proliferation, and remodeling. For a wound to heal successfully, all four phases must occur in the proper sequence and time frame. Many factors can interfere with one or more phases of this process, thus causing improper or impaired wound healing. This article reviews the recent literature on the most significant factors that affect cutaneous wound healing and the potential cellular and/or molecular mechanisms involved. The factors discussed include oxygenation, infection, age and sex hormones, stress, diabetes, obesity, medications, alcoholism, smoking, and nutrition. A better understanding of the influence of these factors on repair may lead to therapeutics that improve wound healing and resolve impaired wounds. PMID:20139336

  4. Business Intelligence Success Factors

    DEFF Research Database (Denmark)

    Gaardboe, Rikke; Jonasen, Tanja Svarre

    2018-01-01

    Business intelligence (BI) is a strategically important practice in many organizations. Several studies have investigated the factors that contribute to BI success; however, an overview of the critical success factors (CSFs) involved is lacking in the extant literature. We have integrated...... culture. In addition, we contribute to the extant research by extending the framework of information system success and identifying gaps in the extant literature. Furthermore, we contribute to practical implementation through an enhanced understanding of the CSFs related to BI success....

  5. Factors Affecting Wound Healing

    OpenAIRE

    Guo, S.; DiPietro, L.A.

    2010-01-01

    Wound healing, as a normal biological process in the human body, is achieved through four precisely and highly programmed phases: hemostasis, inflammation, proliferation, and remodeling. For a wound to heal successfully, all four phases must occur in the proper sequence and time frame. Many factors can interfere with one or more phases of this process, thus causing improper or impaired wound healing. This article reviews the recent literature on the most significant factors that affect cutane...

  6. Brain derived neurotrophic factor

    DEFF Research Database (Denmark)

    Mitchelmore, Cathy; Gede, Lene

    2014-01-01

    Brain Derived Neurotrophic Factor (BDNF) is a neurotrophin with important functions in neuronal development and neuroplasticity. Accumulating evidence suggests that alterations in BDNF expression levels underlie a variety of psychiatric and neurological disorders. Indeed, BDNF therapies are curre......Brain Derived Neurotrophic Factor (BDNF) is a neurotrophin with important functions in neuronal development and neuroplasticity. Accumulating evidence suggests that alterations in BDNF expression levels underlie a variety of psychiatric and neurological disorders. Indeed, BDNF therapies...

  7. Impact factor distribution revisited

    Science.gov (United States)

    Huang, Ding-wei

    2017-09-01

    We explore the consistency of a new type of frequency distribution, where the corresponding rank distribution is Lavalette distribution. Empirical data of journal impact factors can be well described. This distribution is distinct from Poisson distribution and negative binomial distribution, which were suggested by previous study. By a log transformation, we obtain a bell-shaped distribution, which is then compared to Gaussian and catenary curves. Possible mechanisms behind the shape of impact factor distribution are suggested.

  8. Los factores de riesgo

    Directory of Open Access Journals (Sweden)

    Justo Senado Dumoy

    1999-01-01

    Full Text Available Sobre el fundamento filosófico de los conceptos de la Dialéctica Materialista, se presenta un análisis en relación con el concepto e interpretación de los Factores de Riesgo.A analysis on the concept and interpretation of risk factors is presented based on the philosophical foundation of the concepts of materialist dialectics.

  9. FGF growth factor analogs

    Energy Technology Data Exchange (ETDEWEB)

    Zamora, Paul O [Gaithersburg, MD; Pena, Louis A [Poquott, NY; Lin, Xinhua [Plainview, NY; Takahashi, Kazuyuki [Germantown, MD

    2012-07-24

    The present invention provides a fibroblast growth factor heparin-binding analog of the formula: ##STR00001## where R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, X, Y and Z are as defined, pharmaceutical compositions, coating compositions and medical devices including the fibroblast growth factor heparin-binding analog of the foregoing formula, and methods and uses thereof.

  10. The stem factor challenge

    International Nuclear Information System (INIS)

    Russell, M.J.; Steele, R. Jr.; DeWall, K.G.; Watkins, J.C.; Bramwell, D.

    1994-01-01

    One of the most important challenges that still needs to be met in the effort to understand the operation of motor-operated, rising-stem valves is the ability to determine stem factor throughout the valve's load range. The stem factor represents the conversion of operator torque to stem thrust. Determining the stem factor is important because some motor-operated valves (MOVs) cannot be tested in the plant at design basis conditions. The ability of these valves to perform their design basis function (typically, to operate against specified flow and pressure loads) must be ensured by analytical methods or by extrapolating from the results of tests conducted at lower loads. Because the stem factor tends to vary in response to friction and lubrication phenomena that occur during loading and wedging, analytical methods and extrapolation methods have been difficult to develop and implement. Early investigations into variability in the stem factor tended to look only at the tip of the iceberg; they focused on what was happening at torque switch trip, which usually occurs at full wedging. In most stems, the stem factor is better (lower) in the wedging transient than before wedging, so working with torque switch trip data alone led many early researchers to false conclusions about the relationship between stem factor and load. However, research at the Idaho National Engineering Laboratory (INEL) has taken a closer look at what happens during the running portion of the closing stroke along with the wedging portion. This shift in focus is important, because functional failure of a valve typically consists of a failure to isolate flow, not a failure to achieve full wedging. Thus, the stem factor that must be determined for a valve's design basis closing requirements is the one that corresponds with the running load before wedging

  11. Síntomas depresivos en personas mayores: Prevalencia y factores asociados Depressive symptoms in the elderly: Prevalence and associated factors

    Directory of Open Access Journals (Sweden)

    Juan Román Urbina Torija

    2007-02-01

    Full Text Available Objetivos: Estimar la prevalencia de los síntomas depresivos en personas mayores de 64 años y analizar su asociación con variables sociodemográficas, marcadores de fragilidad y enfermedades incapacitantes. Métodos: Estudio descriptivo transversal mediante encuesta. La muestra estuvo constituida por 417 personas mayores de 64 años del área sanitaria de Guadalajara, seleccionados a partir de la tarjeta sanitaria. Para estimar los síntomas depresivos se utilizó el test de Yesavage, con un punto de corte de 6 o superior. El cuestionario contenía variables sociodemográficas, clínicas y escalas evaluativas sobre deterioro cognitivo, discapacidad y riesgo social. Los criterios de fragilidad estudiados fueron: edad mayor de 80 años, ser mujer, deterioro cognitivo, discapacidad, polifarmacia, comorbilidad y riesgo social. Resultados: La prevalencia de síntomas depresivos fue del 19,7% (intervalo de confianza &(IC& del 95%, 15,9-23,4 y tenían diagnóstico de depresión clínica el 5% (IC del 95%, 2,3-7,7. Los síntomas eran más frecuentes en el medio rural (p Objectives: To estimate the prevalence of depressive symptoms in people older than 64 and to analyze their association with sociodemographic factors, frailty markers, and disabling diseases. Methods: A survey-based, cross-sectional descriptive study was carried out. The sample was composed of 417 elderly people living in Guadalajara (Spain, selected on the basis of health cards. Depressive symptoms were assessed using Yesavage's test (cut-off: 6 or more items. The questionnaire contained sociodemographic and clinical items and evaluation scales for cognitive impairment, disability, and social risk. The frailty markers studied were age over 80 years old, female sex, cognitive impairment, disability, polypharmacy, comorbidity, and social risk. Results: The prevalence of depressive symptoms was 19.7% (95% CI, 15.9-23.4 and clinical depression was diagnosed in 5% (95% CI, 2

  12. Hipertensión arterial como factor predictivo en pacientes con cáncer renal tratados con antiangiogénicos Hypertension as predictive factor in renal cell cancer treated with antiangiogenic therapy

    Directory of Open Access Journals (Sweden)

    Luciana Gennari

    2011-06-01

    Full Text Available El conocimiento de las diversas vías de oncogénesis ha llevado al desarrollo en los últimos cinco años de nuevas terapias para el tratamiento del cáncer renal avanzado, las que poseen como blanco al factor derivado del endotelio vascular (VEGF y sus receptores (antiangiogénicos y al blanco mamífero de la rapamicina (mTOR. Los antiangiogénicos constituyen un grupo de moléculas activas con un espectro de toxicidad peculiar que comprende el desarrollo de hipertensión arterial, disfunción tiroidea y síndrome de mano-pie. La identificación de factores predictivos clínicos y moleculares lograría identificar aquellos pacientes que se beneficiarían con dicho tratamiento, evitando exposición y toxicidad innecesaria al resto. La aparición de hipertensión arterial se ha correlacionado con respuesta al tratamiento y eficacia clínica. En nuestra serie retrospectiva, los pacientes tratados con antiangiogénicos que desarrollaron hipertensión arterial tuvieron aumento de la tasa de respuestas e intervalo libre de enfermedad en comparación con aquellos que, tratados de la misma manera, no manifestaron hipertensión. La hipertensión arterial debería considerarse como un factor predictor clínico en su tratamiento. Dichos hallazgos deberían ser corroborados en forma prospectiva y con un mayor número de pacientes.Knowledge of several pathways of oncogenesis has led to the development of novel therapies in the treatment of advanced kidney cancer in the last five years. These have targeted the vascular endothelium-derived factor (VEGF (angiogenesis and mammalian target of rapamycin (mTOR. Antiangiogenics are a group of active molecules with a peculiar spectrum of toxicity including the development of hypertension, thyroid dysfunction and hand-foot syndrome. The identification of molecular and clinical predictors would allow to identify those patients who would benefit from such treatment and saveguarding the rest from toxic exposure. The

  13. Factores de riesgo asociados con el intento suicida y criterios sobre lo ocurrido en adolescentes Risk factors associated with the suicide attempt and the criteria on it happened in the adolescents

    Directory of Open Access Journals (Sweden)

    Alba Cortés Alfaro

    2011-03-01

    Full Text Available Introducción: las tentativas de suicidio se han incrementado considerablemente antes de los 20 años en las últimas décadas. Objetivos: identificar los factores de riesgo asociados con los intentos suicidas en adolescentes de 10 a 19 años. Métodos: se realizó un estudio analítico (casos controles pareados de los adolescentes que tuvieron intento de suicidio en la provincia de Cienfuegos durante el segundo semestre de 2007. Se calcularon porcentajes y medias aritméticas, para identificar asociación se utilizó la prueba chi cuadrado de Mantel y Haenszel y cálculo de odds ratio, sus intervalos de confianza y significación para a= 0,05. Resultados: se identificó asociación con el intento de suicidio de las variables siguientes: deseos de hacerse daño, elaboración de planes anteriores para cometer dicho acto, presencia de desesperanza, maltrato físico, disputa, desconfianza y malas relaciones con los padres, antecedentes familiares de suicidio y enfermedad psiquiátrica, sentirse atormentado, y problemas con la pareja, entre otros. Se encontró que un 9,0 % de los adolescentes estudiados manifestaron no arrepentimiento o sin crítica de lo ocurrido. Conclusiones: existieron factores personales y familiares asociados con los intentos de suicidio, así como un alto porcentaje de adolescentes que intentaron suicidarse con crítica o arrepentimiento de lo ocurrido.Introduction: suicide attempts have increased before the twenties in past decades. Objectives: to identify the risk factors associated with the suicide attempts in adolescents aged 10-19. Methods: an analytical study (matched case-controls was conducted in adolescents with a suicide attempt in the Cienfuegos province during the second semester of 2007. The percentages and arithmetic means were estimated to identify the association we used the Mantel-Haenszel Chi2 test and the odds-ratio calculus, its confidence and signification interval (IC for a= 0,05. Results: the

  14. Factores de riesgo que influyen en el retardo del brote de la dentición temporal.: Policlínico "Turcios Lima", 2000-2003 Risk factors influencing the primary dentition eruption retardation. "Turcios Lima" polyclinics, 2000-2003

    Directory of Open Access Journals (Sweden)

    Zoila Rosa Podadera Valdés

    2004-04-01

    Full Text Available Se realizó un estudio analítico de casos y controles en el área de salud del Policlínico "Turcios Lima" en el período comprendido entre julio de 2000 y julio de 2003, con el objetivo de identificar los factores de riesgo que influyen en el retardo del brote de la dentición temporal. El universo estuvo constituido por 1454 niños, de los cuales se obtuvo una muestra aleatoria de 93 niños. El análisis estadístico se realizó mediante porcentajes, la prueba Chi cuadrado y el cálculo de los odds ratio con sus intervalos de confianza. Se observó que el estado nutricional anormal al inicio del embarazo, las enfermedades asociadas con este, la inadecuada ganancia de peso de la madre y el desarrollo físico del niño, constituyeron los factores que más influyeron en la problemática estudiada. Se concluye que existe una significativa influencia del estado nutricional de la madre y del niño en el retardo del brote de su dentición temporal.An analytical case-control study was carried out in "Turcios Lima" polyclinics from July, 2000 to July, 2003, to identify the risk factors influencing primary dentition eruption retardation. The universe was formed by 1 454 children from whom a random sample of 93 children was taken. The statistical analysis was based on Chi-square test and calculation of percentages and odds ratios with confidence intervals. It was observed that poor nutritional status at the beginning of pregnancy, pregnancy-related diseases, inadequate weight gain by the mother and the physical development of the infant were the most influential factors. It was concluded that there is significant influence of the nutritional status of the child and the mother on primary dentition eruption retardation.

  15. [Pathological gambling: risk factors].

    Science.gov (United States)

    Bouju, G; Grall-Bronnec, M; Landreat-Guillou, M; Venisse, J-L

    2011-09-01

    In France, consumption of gambling games increased by 148% between 1960 and 2005. In 2004, gamblers lost approximately 0.9% of household income, compared to 0.4% in 1960. This represents approximately 134 Euros per year and per head. In spite of this important increase, the level remains lower than the European average (1%). However, gambling practices may continue to escalate in France in the next few years, particularly with the recent announce of the legalisation of online games and sports betting. With the spread of legalised gambling, pathological gambling rates may increase in France in the next years, in response to more widely available and more attractive gambling opportunities. In this context, there is a need for better understanding of the risk factors that are implicated in the development and maintenance of pathological gambling. This paper briefly describes the major risk factors for pathological gambling by examining the recent published literature available during the first quarter of 2008. This documentary basis was collected by Inserm for the collective expert report procedure on Gambling (contexts and addictions). Seventy-two articles focusing on risk factors for pathological gambling were considered in this review. Only 47 of them were taken into account for analysis. The selection of these 47 publications was based on the guide on literature analysis established by the French National Agency for Accreditation and Assessment in Health (ANAES, 2000). Some publications from more recent literature have also been added, mostly about Internet gambling. We identify three major types of risk factors implicated in gambling problems: some of them are related to the subject (individual factors), others are related to the object of the addiction, here the gambling activity by itself (structural factors), and the last are related to environment (contextual or situational factors). Thus, the development and maintenance of pathological gambling seems to be

  16. OPTIMAL SELECTION OF THE CA-CFAR ADJUSTMENT FACTOR FOR K POWER SEA CLUTTER WITH STATISTICAL VARIATIONS

    Directory of Open Access Journals (Sweden)

    José Raúl Machado Fernández

    2017-01-01

    Full Text Available La presencia de la señal interferente de clutter marino establece limitaciones en la calidad de la detección de radar en ambientes costeros y de alta mar. El procesador CA-CFAR es la solución clásica para detectar blancos de radar. Usualmente mantiene su factor de ajuste constante todo el período de operación. Como consecuencia, el esquema no toma en consideración las variaciones estadísticas de la señal de fondo cuando realiza la discriminación del clutter . Para resolver este problema, los autores realizaron un procesamiento intensivo de 40 millones de muestras de clutter de intensidad, generadas en computadora a través de MATLAB. Como resultado, encontraron los valores óptimos del factor de ajuste a ser aplicados para 40 posibles estados estadísticos del clutter , sugiriendo el uso de la arquitectura CA-CFAR con un factor de ajuste variable. Adicionalmente, fue llevado a cabo un ajuste de curvas, obteniéndose expresiones matemáticas que generalizan los resultados en todo el intervalo de considerado de estados estadísticos del clutter . Los experimentos se ejecutaron con un CA-CFAR de 64 celdas y apuntaron a encontrar los valores del factor de ajuste para tres probabilidades de falsa alarma comunes. La distribución K fue elegida como el modelo usado para el clutter , gracias a su amplia popularidad. Este artículo facilita el manejo de la distribución K de intensidad, evitando el uso de funciones Gamma y Bessel, comúnmente encontradas en desarrollos relacionados con el modelo K. Además, fueron cumplidos los requerimientos necesarios para construir un detector adaptativo en clutter de potencia K con conocimiento previo del parámetro de forma. Al mismo tiempo, fueron dadas varias recomendaciones para continuar el desarrollo de una solución más general que también incluirá la estimación del parámetro de forma.

  17. Factores asociados a la no adherencia al tratamiento antirretroviral de gran actividad en adultos infectados con el VIH-sida

    Directory of Open Access Journals (Sweden)

    Óscar Alvis

    2009-12-01

    Full Text Available Introducción: La no adherencia al tratamiento antirretroviral de gran actividad (Targa es la principal causa de fracaso terapéutico. Objetivos: Determinar la prevalencia y los factores asociados a la no adherencia al Targa en adultos infectados con el VIH-sida. Diseño: Estudio transversal. Institución: Servicio de Infectología, Hospital Nacional Arzobispo Loayza. Participantes: Pacientes infectados con el VIH que se encontraban recibiendo tratamiento antirretroviral. Intervenciones: A pacientes infectados con el VIH que se encontraban recibiendo tratamiento antirretroviral en el hospital, se aplicó un cuestionario estructurado, elaborado en función a instrumentos que evalúan la adherencia y factores asociados. Para determinar la asociación, se empleó las pruebas de chi cuadrado y t de student, se estableció un nivel de significación estadística p<0,05, y para calcular el riesgo se utilizó el OR, con intervalos de confianza de 95%. Se realizó análisis de regresión logística. Principales medidas de resultados: No adherencia al tratamiento antirretroviral de gran actividad. Resultados: Se encuestó 465 personas; la edad promedio fue 36,8±9,1 años; 64,1% era varón. El 35,9% de los encuestados resultó ser no adherente. Los factores independientemente asociados a la no adherencia fueron: ser homosexual/bisexual (OR: 3,85, IC95% 1,98 a 7,51, tener una baja calidad de vida relacionada a la salud (OR: 6,22, IC95% 3,47 a 11,13, poco apoyo social (OR: 5,41, IC95% 3,17 a 9,22, no tener domicilio fijo (OR 3,34, IC95% 1,93 a 5,79, tener morbilidad psíquica (OR 2,93, IC95% 1,78 a 4,82 y tener mayor tiempo en tratamiento (OR 1,04, IC95% 1,02 a 1,07. Conclusiones: La prevalencia de no adherencia fue mayor a la reportada previamente en este mismo hospital, pero similar a la encontrada en diferentes estudios, pese a la heterogeneidad de los mismos. Los factores de tipo psicosocial fueron los que influyeron de forma más importante en la

  18. Building-transmission factors

    International Nuclear Information System (INIS)

    Woolson, W.A.; Marcum, J.; Scott, W.H.; Staggs, V.E.

    1982-01-01

    Parametric representations (called the nine-parameter formula) of the measurements of the radiation transmission through Japanese house models at the BREN reactor and 60 Co experiments are used to correct the free-in-air (FIA) T65 dose values for buildings shielding in the built-up residential areas at Hiroshima and Nagasaki. The accuracy of transmission factors derived from the nine-parameter formula impact the accuracy of the final-exposure dose estimates in the same manner as the accuracy of weapon yield and FIA radiation transport. A preliminary investigation of the accuracy of these transmission factors, sponsored by the Defense Nuclear Agency, has focused primarily on the adequacy of the Bare Reactor Experiment, Nevada (BREN) radiation environments for producing transmission factor data relevant to the situations at Hiroshima and Nagasaki. In addition, the radiation equivalency of house models used at BREN to Japanese house models and the physical basis for the nine-parameter formula have been studied. This investigation has concluded that the average gamma-ray transmission factors based on the nine-parameter formula are probably too high by about a factor of 2. The large discrepancy between the nine-parameter formula and recent estimates results from the apparent failure to properly account for the large gamma-ray dose component caused by capture gamma rays produced in the house walls by the large neutron flux present at BREN

  19. Risk Factors for Dementia

    Directory of Open Access Journals (Sweden)

    Jen-Hau Chen

    2009-10-01

    Full Text Available Dementia is a complex human disease. The incidence of dementia among the elderly population is rising rapidly worldwide. In the United States, Alzheimer's disease (AD is the leading type of dementia and was the fifth and eighth leading cause of death in women and men aged ≥ 65 years, respectively, in 2003. In Taiwan and many other counties, dementia is a hidden health issue because of its underestimation in the elderly population. In Western countries, the prevalence of AD increases from 1–3% among people aged 60–64 years to 35% among those aged > 85 years. In Taiwan, the prevalence of dementia for people aged ≥ 65 years was 2–4% by 2000. Therefore, it is important to identify protective and risk factors for dementia to prevent this disease at an early stage. Several factors are related to dementia, e.g. age, ethnicity, sex, genetic factors, physical activity, smoking, drug use, education level, alcohol consumption, body mass index, comorbidity, and environmental factors. In this review, we focus on studies that have evaluated the association between these factors and the risk of dementia, especially AD and vascular dementia. We also suggest future research directions for researchers in dementia-related fields.

  20. CATTELL AND EYSENCK FACTOR SCORES RELATED TO COMREY PERSONALITY FACTORS.

    Science.gov (United States)

    Comrey, A L; Duffy, K E

    1968-10-01

    The Eysenck Personality Inventory, the Cattell 16 PF Inventory, and the Comrey Personality Inventory were administered to 272 volunteers. Eysenck and Cattell factor scores were correlated with scores over homogeneous item groups (FHIDs) which define the Comrey test factors. This matrix was factor analyzed to relate the Eysenck and Cattell factor scores to the factor structure underlying the Comrey test. The Eysenck Neuroticism, Comrey Neuroticism, and Cattell second-order Anxiety factors appeared to match. The Eysenck Introversion and the Comrey Shyness factors also matched. The 16 Cattell primary factors overlapped but did not match with the Comrey factors.

  1. Business Intelligence Success Factors

    DEFF Research Database (Denmark)

    Gaardboe, Rikke; Jonasen, Tanja Svarre

    2018-01-01

    Business intelligence (BI) is a strategically important practice in many organizations. Several studies have investi-gated the factors that contribute to BI success; however, an overview of the critical success factors (CSFs) involved is lacking in the extant literature. We have integrated...... the findings of 43 studies after conducting a building block search strategy, refer-ence and citation search, and critical assessment of the identified papers. A framework of information system success was used to identify the CSFs and analyze how researchers identify information system success. We discovered...... 34 CSFs related to BI success. The distinct CSFs identified in the extant literature relate to project management skills (13 papers), management support (20 papers), and user involvement (11 papers). In the articles with operationalized BI success, we found several dis-tinct factors: system quality...

  2. Amblyopia risk factor prevalence.

    Science.gov (United States)

    Arnold, Robert W

    2013-01-01

    In 2003, the American Association for Pediatric Ophthalmology and Strabismus (AAPOS) published a set of risk factors for amblyopia. The intent was to promote uniformity of reporting and development in screening. Because this prevalence is not yet known, this meta-analysis is an attempt to estimate it. Major community preschool eye examination studies were reviewed and AAPOS cut-offs estimated. The approximate prevalence of anisometropia is 1.2%, hyperopia is 6%, astigmatism is 15%, myopia is 0.6%, strabismus is 2.5%, and visual acuity less than 20/40 is 6%. The mean combined prevalence is 21% ± 2% compared to a prevalence of amblyopia 20/40 and worse of 2.5%. Knowing risk factor prevalence simplifies validation efforts. Amblyopia screening with a risk factor sensitivity less than 100% is expected and desirable. Copyright 2013, SLACK Incorporated.

  3. factores psicosociales asociados

    Directory of Open Access Journals (Sweden)

    María Teresa Varela Arévalo

    2007-01-01

    Full Text Available El objetivo de este trabajo fue describir el consumo de sustancias psicoactivas [SPA] ilegales en jóvenes y los factores psicosociales de riesgo y de protección asociados. Participaron 763 estudiantes (46,5% hombres y 52,4% mujeres de una universidad privada de Cali, quienes diligenciaron el cuestionario de factores de riesgo y protección para el consumo de drogas. Los resultados muestran que la marihuana fue la droga de mayor consumo; y que existe una fuerte asociación entre el consumo de las cuatro SPA ilegales (marihuana, opiáceos, cocaína y éxtasis y los factores psicosociales de riesgo y/o protección, principalmente, las habilidades de autocontrol, los preconceptos y valoración de las SPA, la relación con personas consumidoras y los comportamientos perturbadores.

  4. Human factors guides

    International Nuclear Information System (INIS)

    Penington, J.

    1995-10-01

    This document presents human factors guides, which have been developed in order to provide licensees of the AECB with advice as to how to address human factors issues within the design and assessment process. This documents presents the results of a three part study undertaken to develop three guides which are enclosed in this document as Parts B, C and D. As part of the study human factors standards, guidelines, handbooks and other texts were researched, to define those which would be most useful to the users of the guides and for the production of the guides themselves. Detailed specifications were then produced to outline the proposed contents and format of the three guides. (author). 100 refs., 3 tabs., 11 figs

  5. Multi-factor authentication

    Science.gov (United States)

    Hamlet, Jason R; Pierson, Lyndon G

    2014-10-21

    Detection and deterrence of spoofing of user authentication may be achieved by including a cryptographic fingerprint unit within a hardware device for authenticating a user of the hardware device. The cryptographic fingerprint unit includes an internal physically unclonable function ("PUF") circuit disposed in or on the hardware device, which generates a PUF value. Combining logic is coupled to receive the PUF value, combines the PUF value with one or more other authentication factors to generate a multi-factor authentication value. A key generator is coupled to generate a private key and a public key based on the multi-factor authentication value while a decryptor is coupled to receive an authentication challenge posed to the hardware device and encrypted with the public key and coupled to output a response to the authentication challenge decrypted with the private key.

  6. Model Correction Factor Method

    DEFF Research Database (Denmark)

    Christensen, Claus; Randrup-Thomsen, Søren; Morsing Johannesen, Johannes

    1997-01-01

    The model correction factor method is proposed as an alternative to traditional polynomial based response surface techniques in structural reliability considering a computationally time consuming limit state procedure as a 'black box'. The class of polynomial functions is replaced by a limit...... statebased on an idealized mechanical model to be adapted to the original limit state by the model correction factor. Reliable approximations are obtained by iterative use of gradient information on the original limit state function analogously to previous response surface approaches. However, the strength...... of the model correction factor method, is that in simpler form not using gradient information on the original limit state function or only using this information once, a drastic reduction of the number of limit state evaluation is obtained together with good approximations on the reliability. Methods...

  7. Geothermal Plant Capacity Factors

    Energy Technology Data Exchange (ETDEWEB)

    Greg Mines; Jay Nathwani; Christopher Richard; Hillary Hanson; Rachel Wood

    2015-01-01

    The capacity factors recently provided by the Energy Information Administration (EIA) indicated this plant performance metric had declined for geothermal power plants since 2008. Though capacity factor is a term commonly used by geothermal stakeholders to express the ability of a plant to produce power, it is a term frequently misunderstood and in some instances incorrectly used. In this paper we discuss how this capacity factor is defined and utilized by the EIA, including discussion on the information that the EIA requests from operations in their 923 and 860 forms that are submitted both monthly and annually by geothermal operators. A discussion is also provided regarding the entities utilizing the information in the EIA reports, and how those entities can misinterpret the data being supplied by the operators. The intent of the paper is to inform the facility operators as the importance of the accuracy of the data that they provide, and the implications of not providing the correct information.

  8. Factor XI deficiency

    Directory of Open Access Journals (Sweden)

    Jayme Diamant

    2004-06-01

    Full Text Available We describe a patient with a prolonged aPTT who was diagnosedas having factor XI deficiency after a rather large hematoma wasformed after angiography. Factor XI deficiency affects 1 in 1 millionpeople, but it is more common in Ashkenazim with a gene frequencyof 5% to 11%, being 0.3% homozygotes. These individuals usuallydo not present hemorrhagic events, except in cases of trauma orsurgery. These patients should be identified by routine coagulationscreening; bleeding could be prevented by use of fresh humanplasma or plasma concentrates.

  9. The Transcription Factor Encyclopedia

    DEFF Research Database (Denmark)

    Yusuf, Dimas; Butland, Stefanie L; Swanson, Magdalena I

    2012-01-01

    mini review articles on pertinent human, mouse and rat TFs. Notable features of the TFe website include a high-quality PDF generator and web API for programmatic data retrieval. TFe aims to rapidly educate scientists about the TFs they encounter through the delivery of succinct summaries written......ABSTRACT: Here we present the Transcription Factor Encyclopedia (TFe), a new web-based compendium of mini review articles on transcription factors (TFs) that is founded on the principles of open access and collaboration. Our consortium of over 100 researchers has collectively contributed over 130...... and vetted by experts in the field. TFe is available at http://www.cisreg.ca/tfe....

  10. Factores de riesgo : prevalencia

    OpenAIRE

    Banegas, José Ramón

    2005-01-01

    Casi la mitad de la población adulta española presenta al menos un factor de riesgo cardiovascular importante: hipertensión, tabaquismo, colesterol alto, sobrepeso, sedentarismo o diabetes, y muchos de estos individuos no lo saben, o no están tratados o no están bien controlados. Por lo tanto, mejorar el grado de conocimiento, tratamiento y control de estos factores de riesgo podría contribuir sustancialmente a reducir la magnitud de la enfermedad cardiovascular como problema de salud pública...

  11. The transcription factor encyclopedia.

    Science.gov (United States)

    Yusuf, Dimas; Butland, Stefanie L; Swanson, Magdalena I; Bolotin, Eugene; Ticoll, Amy; Cheung, Warren A; Zhang, Xiao Yu Cindy; Dickman, Christopher T D; Fulton, Debra L; Lim, Jonathan S; Schnabl, Jake M; Ramos, Oscar H P; Vasseur-Cognet, Mireille; de Leeuw, Charles N; Simpson, Elizabeth M; Ryffel, Gerhart U; Lam, Eric W-F; Kist, Ralf; Wilson, Miranda S C; Marco-Ferreres, Raquel; Brosens, Jan J; Beccari, Leonardo L; Bovolenta, Paola; Benayoun, Bérénice A; Monteiro, Lara J; Schwenen, Helma D C; Grontved, Lars; Wederell, Elizabeth; Mandrup, Susanne; Veitia, Reiner A; Chakravarthy, Harini; Hoodless, Pamela A; Mancarelli, M Michela; Torbett, Bruce E; Banham, Alison H; Reddy, Sekhar P; Cullum, Rebecca L; Liedtke, Michaela; Tschan, Mario P; Vaz, Michelle; Rizzino, Angie; Zannini, Mariastella; Frietze, Seth; Farnham, Peggy J; Eijkelenboom, Astrid; Brown, Philip J; Laperrière, David; Leprince, Dominique; de Cristofaro, Tiziana; Prince, Kelly L; Putker, Marrit; del Peso, Luis; Camenisch, Gieri; Wenger, Roland H; Mikula, Michal; Rozendaal, Marieke; Mader, Sylvie; Ostrowski, Jerzy; Rhodes, Simon J; Van Rechem, Capucine; Boulay, Gaylor; Olechnowicz, Sam W Z; Breslin, Mary B; Lan, Michael S; Nanan, Kyster K; Wegner, Michael; Hou, Juan; Mullen, Rachel D; Colvin, Stephanie C; Noy, Peter John; Webb, Carol F; Witek, Matthew E; Ferrell, Scott; Daniel, Juliet M; Park, Jason; Waldman, Scott A; Peet, Daniel J; Taggart, Michael; Jayaraman, Padma-Sheela; Karrich, Julien J; Blom, Bianca; Vesuna, Farhad; O'Geen, Henriette; Sun, Yunfu; Gronostajski, Richard M; Woodcroft, Mark W; Hough, Margaret R; Chen, Edwin; Europe-Finner, G Nicholas; Karolczak-Bayatti, Magdalena; Bailey, Jarrod; Hankinson, Oliver; Raman, Venu; LeBrun, David P; Biswal, Shyam; Harvey, Christopher J; DeBruyne, Jason P; Hogenesch, John B; Hevner, Robert F; Héligon, Christophe; Luo, Xin M; Blank, Marissa Cathleen; Millen, Kathleen Joyce; Sharlin, David S; Forrest, Douglas; Dahlman-Wright, Karin; Zhao, Chunyan; Mishima, Yuriko; Sinha, Satrajit; Chakrabarti, Rumela; Portales-Casamar, Elodie; Sladek, Frances M; Bradley, Philip H; Wasserman, Wyeth W

    2012-01-01

    Here we present the Transcription Factor Encyclopedia (TFe), a new web-based compendium of mini review articles on transcription factors (TFs) that is founded on the principles of open access and collaboration. Our consortium of over 100 researchers has collectively contributed over 130 mini review articles on pertinent human, mouse and rat TFs. Notable features of the TFe website include a high-quality PDF generator and web API for programmatic data retrieval. TFe aims to rapidly educate scientists about the TFs they encounter through the delivery of succinct summaries written and vetted by experts in the field. TFe is available at http://www.cisreg.ca/tfe.

  12. Graph factors modulo k

    DEFF Research Database (Denmark)

    Thomassen, Carsten

    2014-01-01

    We prove a general result on graph factors modulo k . A special case says that, for each natural number k , every (12k−7)-edge-connected graph with an even number of vertices contains a spanning subgraph in which each vertex has degree congruent to k modulo 2k.......We prove a general result on graph factors modulo k . A special case says that, for each natural number k , every (12k−7)-edge-connected graph with an even number of vertices contains a spanning subgraph in which each vertex has degree congruent to k modulo 2k....

  13. Factoring humans into procedures

    International Nuclear Information System (INIS)

    Luna, S.F.; Sturdivant, M.H.; McKay, R.C.

    1988-01-01

    INPO statistics on reported events in nuclear power plants rank deficient procedures as the largest single cause of human performance errors. Human factors principles used to improve the effectiveness of the control room operator can also improve the usability of written procedures. This human factors approach treats each page or complement of pages as a display. Four techniques for applying this approach are reviewed in this paper: (1) presenting information in small blocks (or fields), (2) presenting information consistently, (3) using the mental templates of the performer, and (4) matching the physical features of the plant. A final section offers examples in which combinations of these techniques are used

  14. Factor analysis and scintigraphy

    International Nuclear Information System (INIS)

    Di Paola, R.; Penel, C.; Bazin, J.P.; Berche, C.

    1976-01-01

    The goal of factor analysis is usually to achieve reduction of a large set of data, extracting essential features without previous hypothesis. Due to the development of computerized systems, the use of largest sampling, the possibility of sequential data acquisition and the increase of dynamic studies, the problem of data compression can be encountered now in routine. Thus, results obtained for compression of scintigraphic images were first presented. Then possibilities given by factor analysis for scan processing were discussed. At last, use of this analysis for multidimensional studies and specially dynamic studies were considered for compression and processing [fr

  15. STEREOTYPICAL FACTORS IN TOURISM

    Directory of Open Access Journals (Sweden)

    Cristina-Elena ALBU

    2013-06-01

    Full Text Available International tourism has grown rapidly nowdays, contributing to the growth of the global economy. The purpose of this essay is to identify and analyze stereotypical factors in the development of strategies concerning the offer for the tourism industry: the image of a tourist destination, brand, country of origin and customer behaviour. Documentary study was the research method used: representative articles were analysed, as recent as possible, to determine the factors mentioned above. Professionals in the industry of tourism need to understand cultural differences between tourists, as well as those of the host country, to be able to create tourist reception offers that live up to the standards expected by clients.

  16. Factors stimulating content marketing

    Directory of Open Access Journals (Sweden)

    Naser Azad

    2016-02-01

    Full Text Available This paper presents an empirical investigation to determine factors influencing on content marketing in banking industry. The study designs a questionnaire consists of 40 questions in Likert scale and distributes it among 550 randomly selected regular customers of Bank Mellat in city of Tehran, Iran and 400 properly filled questionnaires are collected. Cronbach alphas for all components of the survey are well above desirable level. Using principle component analysis with Varimax rotation, the study has determined six factors influencing the most on content marketing including organization, details, having new ideas, quality, sensitivity and power while the last component contains only two subcomponents and is removed from the study.

  17. Factores sociales del emprendimiento

    OpenAIRE

    Torres Martín, Francisco José

    2017-01-01

    Podemos definir el emprendimiento social como todo aquel emprendimiento que se ha creado con un fin social, con el objetivo prioritario de crear un impacto positivo en la sociedad, mediante una actividad económica. Es importante analizar los aspectos sociales que llevan a la persona adentrase al mundo empresarial, así como las consecuencias que estos les ocasionan. En el trabajo vamos estudiar en profundidad los factores sociales más importantes a la hora de emprender. Los factores sociale...

  18. Frecuentación del servicio de urgencias y factores sociodemográficos

    Directory of Open Access Journals (Sweden)

    Braun T.

    2002-01-01

    Full Text Available Objetivos: La utilización por parte de la población de los recursos sanitarios se encuentra relacionada con los niveles de salud y con factores socioeconómicos. Los grupos de población con menor nivel socioeconómico tienen una mayor utilización de determinados recursos sanitarios; los servicios de urgencia podrían presentar un uso diferencial entre los distintos grupos de población. El presente estudio pretende identificar diferencias en el uso de los recursos de atención urgente entre grupos con diferentes características socioeconómicas. Material y métodos: Se realiza un estudio poblacional, en el que mediante el agrupamiento de las secciones censales de la ciudad de Santander, según variables sociodemográficas (edad, nivel de formación y nivel de empleo, se establecen áreas de la ciudad con similares características, mediante análisis de clusters. Se identifica el origen de los pacientes que consultan en el Servicio de Urgencias Hospitalarias (SUH del Hospital Marqués de Valdecilla, y se calcula la tasa de demanda para cada una de las áreas sociodemográficas. Resultados: El análisis de clusters es capaz de identificar cuatro agrupaciones de diferentes características socioeconómicas que se ajustan a barrios de la ciudad de Santander. Se aprecia una mayor utilización del SUH en los grupos sociales más desfavorecidos y de mayor edad media (odds ratio [OR] = 1,91; intervalo de confianza [IC] del 95% 1,73-2,1 de la agrupación 1 con respecto a la 4. La proporción de ingresos es superior en las agrupaciones más favorecidas, mientras que el número de usuarios que realizan visitas repetidas proceden de agrupaciones con menor nivel socioeconómico. Conclusión: La utilización del SUH está condicionada por las características sociodemográficas del área de residencia, identificándose mayor uso entre los grupos de más bajo nivel socioeconómico.

  19. Prevalencia de vaginosis bacteriana y factores asociados en veinte ciudades del Perú

    Directory of Open Access Journals (Sweden)

    Lorena López-Torres

    Full Text Available Objetivos. Determinar la prevalencia de vaginosis bacteriana (VB y factores asociados en mujeres peruanas de 18 a 29 años de edad en 20 ciudades a partir de datos del proyecto PREVEN. Materiales y métodos. Estudio de tipo transversal, la definición de VB se realizó previa selección de una muestra de secreción vaginal en una lámina portaobjetos. Las láminas fueron teñidas usando la tinción Gram para ser observadas al microscopio usando el puntaje de Nugent, el diagnóstico de VB se aplicó a los puntajes 7-10. Se estimaron razones de prevalencias (RP y sus intervalos de confianza al 95% (IC 95% mediante el uso de modelos lineales generalizados. Resultados. Un total de 6322 mujeres contestaron la encuesta epidemiológica y proporcionaron muestras vaginales. La prevalencia de VB fue de 23,7% (IC95%: 22,6-24,7 y se asoció con tener un mayor número de parejas sexuales en los últimos 12 meses (RP: 1,22, IC 95%: 1,03-1,44, p=0,020; para dos parejas y RP: 1,46, IC 95%: 1,23-1,74, p<0,001 para tres o más parejas, no usar condón en la última relación sexual (RP: 1,16, IC 95%: 1,01-1,34, p=0,034, ser residente de la sierra (RP: 1,18, IC 95%: 1,05-1,31, p=0,004 y tener flujo vaginal anormal o con mal olor (RP: 1,20, IC 95%: 1,09-1,33, p<0,001. Conclusiones. La alta prevalencia de VB encontrada remarca la necesidad de fortalecer los servicios de salud para la detección y tratamiento de esta condición.

  20. Prevalence of fatigue and associated factors in chronic low back pain patients Prevalencia y factores asociados con la fatiga en pacientes con dolor lumbar crónico Prevalência de fadiga e fatores relacionados em pacientes com dor lombar crônica

    Directory of Open Access Journals (Sweden)

    Marina de Góes Salvetti

    2013-02-01

    Full Text Available OBJECTIVES: to determine the prevalence and key factors associated with fatigue in chronic low back pain patients. METHODS: cross-sectional study of 215 chronic low back pain patients from three health care centers and two industrial corporations. The crude prevalence of fatigue and its 95% confidence interval (CI were calculated. Associations between fatigue and the independent variables were measured. RESULTS: the prevalence of fatigue among the participants was 26.0% [95% CI: 20.3 - 32.5]. Fatigue was independently associated with depression and self-efficacy. An increase of one unit in the score of depression increased the risk of fatigue by 9%; an increase of one unit in the score of self-efficacy reduced the risk of fatigue by 2%. CONCLUSIONS: fatigue was prevalent in chronic low back pain patients and associated with depression and self-efficacy. Knowing these factors can direct strategies for prevention and control of fatigue in chronic low back pain patients.OBJETIVOS: Determinar la prevalencia y factores asociados con la fatiga en pacientes con dolor lumbar crónico. MÉTODOS: Estudio transversal con 215 pacientes con dolor lumbar crónico en tres servicios de salud y dos industrias. La prevalencia de la fatiga y su intervalo de confianza (IC se calcularon. Las asociaciones entre variables independientes y la fatiga se calcularon. RESULTADOS: La prevalencia de la fatiga en los pacientes con dolor lumbar crónico fue del 26% [20,3 a 32,5, IC 95%]. La fatiga se asocia con la depresión y la autoeficacia. El aumento de un punto en la puntuación de depresión aumentó un 9% el riesgo de fatiga y un aumento de un punto en la auto-eficacia reduce el riesgo de la fatiga en el 2%. CONCLUSIONES: La fatiga es frecuente en pacientes con dolor lumbar crónico y se asocia con la depresión y la autoeficacia. Conocer estos factores puede dirigir las estrategias de prevención y control de la fatiga en pacientes con dolor lumbar cr

  1. Risk factors for hypospadias.

    NARCIS (Netherlands)

    Brouwers, M.M.; Feitz, W.F.J.; Roelofs, L.A.J.; Kiemeney, L.A.L.M.; Gier, R.P.E. de; Roeleveld, N.

    2007-01-01

    Despite being one of the most common congenital defects in boys, the etiology of hypospadias remains largely unknown. In this case-referent study, we evaluated a wide spectrum of potential risk factors for hypospadias. Cases were identified from the hospital information system, and referents were

  2. Human factors information system

    International Nuclear Information System (INIS)

    Goodman, P.C.; DiPalo, C.A.

    1991-01-01

    Nuclear power plant safety is dependent upon human performance related to plant operations. To provide improvements in human performance, data collection and assessment play key roles. This paper reports on the Human factors Information System (HFIS) which is designed to meet the needs of the human factors specialists of the United States Nuclear Regulatory Commission. These specialists identify personnel errors and provide guidance designed to prevent such errors. HFIS is a simple and modular system designed for use on a personal computer. It is designed to contain four separate modules that provide information indicative of program or function effectiveness as well as safety-related human performance based on programmatic and performance data. These modules include the Human Factors Status module; the Regulatory Programs module; the Licensee Event Report module; and the Operator Requalification Performance module. Information form these modules can either be used separately or can be combined due to the integrated nature of the system. HFIS has the capability, therefore, to provide insights into those areas of human factors that can reduce the probability of events caused by personnel error at nuclear power plants and promote the health and safety of the public. This information system concept can be applied to other industries as well as the nuclear industry

  3. Fano factor estimation

    Czech Academy of Sciences Publication Activity Database

    Rajdl, Kamil; Lánský, Petr

    2014-01-01

    Roč. 11, č. 1 (2014), s. 105-123 ISSN 1547-1063 R&D Projects: GA ČR(CZ) GAP103/11/0282; GA ČR(CZ) GBP304/12/G069 Institutional support: RVO:67985823 Keywords : variability * neuronal activity * information Subject RIV: JD - Computer Applications, Robotics Impact factor: 0.840, year: 2014

  4. A Formula for Factoring.

    Science.gov (United States)

    Roebuck, Kay I. Meeks

    1997-01-01

    Suggests use of the quadratic formula to build understanding that connections between factors and solutions to equations work both ways. Making use of natural connections among concepts allows students to work more efficiently. Presents four sample problems showing the roots of equations. Messy quadratic equations with rational roots can be solved…

  5. Factoring Fermat Numbers

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 1; Issue 1. Factoring Fermat Numbers. C E Veni Madhavan. Research News Volume 1 Issue 1 January 1996 pp 108-108. Fulltext. Click here to view fulltext PDF. Permanent link: http://www.ias.ac.in/article/fulltext/reso/001/01/0108-0108. Author Affiliations.

  6. Factors affecting mining costs

    International Nuclear Information System (INIS)

    Lowell, A.F.

    1977-01-01

    The subject is discussed under the following headings: investment decision-making, unit cost factors (declining ore grade, low-price contracts, ore grade/output relationship, above average cost increases). Economic, environmental, sociological and political aspects are considered. (U.K.)

  7. Introduction to human factors

    International Nuclear Information System (INIS)

    Winters, J.M.

    1988-03-01

    Some background is given on the field of human factors. The nature of problems with current human/computer interfaces is discussed, some costs are identified, ideal attributes of graceful system interfaces are outlined, and some reasons are indicated why it's not easy to fix the problems

  8. Irrational factor races

    Indian Academy of Sciences (India)

    We investigate the behavior of the sum of the irrational factor function over arithmetic progressions. We first establish a general asymptotic formula for such a sum, and then obtain some further results in the case of arithmetic progressions 3 ± 1.

  9. Factors Impacting Knowledge Sharing

    DEFF Research Database (Denmark)

    Schulzmann, David; Slepniov, Dmitrij

    The purpose of this paper is to examine various factors affecting knowledge sharing at the R&D center of a Western MNE in China. The paper employs qualitative methodology and is based on the action research and case study research techniques. The findings of the paper advance our understanding ab...

  10. Factoring Fermat Numbers

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 1; Issue 1. Factoring Fermat Numbers. C E Veni Madhavan. Research News Volume 1 Issue 1 January 1996 pp 108-108. Fulltext. Click here to view fulltext PDF. Permanent link: https://www.ias.ac.in/article/fulltext/reso/001/01/0108-0108 ...

  11. Assessment of Human Factors

    Science.gov (United States)

    Mount, Frances; Foley, Tico

    1999-01-01

    Human Factors Engineering, often referred to as Ergonomics, is a science that applies a detailed understanding of human characteristics, capabilities, and limitations to the design, evaluation, and operation of environments, tools, and systems for work and daily living. Human Factors is the investigation, design, and evaluation of equipment, techniques, procedures, facilities, and human interfaces, and encompasses all aspects of human activity from manual labor to mental processing and leisure time enjoyments. In spaceflight applications, human factors engineering seeks to: (1) ensure that a task can be accomplished, (2) maintain productivity during spaceflight, and (3) ensure the habitability of the pressurized living areas. DSO 904 served as a vehicle for the verification and elucidation of human factors principles and tools in the microgravity environment. Over six flights, twelve topics were investigated. This study documented the strengths and limitations of human operators in a complex, multifaceted, and unique environment. By focusing on the man-machine interface in space flight activities, it was determined which designs allow astronauts to be optimally productive during valuable and costly space flights. Among the most promising areas of inquiry were procedures, tools, habitat, environmental conditions, tasking, work load, flexibility, and individual control over work.

  12. PATTERNS AND FACTORS INVOLVED

    African Journals Online (AJOL)

    Between 1*' of July 1996 and 30'h of June 2000 a total of 3583 patients were registered at the accident and emergency unit of Nnamdi. Azikiwe ... The case files of these were reviewed with a view to ascertaining the causes and factors involved in the deaths of these patients. The .... H.I.V/AIDS related complications 23 6.8.

  13. Functional Maximum Autocorrelation Factors

    DEFF Research Database (Denmark)

    Larsen, Rasmus; Nielsen, Allan Aasbjerg

    2005-01-01

    \\verb+~+\\$\\backslash\\$cite{ramsay97} to functional maximum autocorrelation factors (MAF)\\verb+~+\\$\\backslash\\$cite{switzer85,larsen2001d}. We apply the method to biological shapes as well as reflectance spectra. {\\$\\backslash\\$bf Methods}. MAF seeks linear combination of the original variables that maximize autocorrelation between...

  14. Human factors in network security

    OpenAIRE

    Jones, Francis B.

    1991-01-01

    Human factors, such as ethics and education, are important factors in network information security. This thesis determines which human factors have significant influence on network security. Those factors are examined in relation to current security devices and procedures. Methods are introduced to evaluate security effectiveness by incorporating the appropriate human factors into network security controls

  15. Is tumor necrosis factor - 376a promoter polymorphism associated with susceptibility to multiple sclerosis? ¿El polimorfismo-376A del promotor del gen del factor de necrosis tumoral se asocia con una mayor susceptibilidad a padecer esclerosis múltiple?

    Directory of Open Access Journals (Sweden)

    Marcelo A. Kauffman

    2007-10-01

    Full Text Available A single nucleotide polymorphism (SNP at position -376 of the tumor necrosis factor á gene (TNFA has been associated with susceptibility to multiple sclerosis (MS in Spain. However, no association was found in populations from the USA and The Netherlands. Here we investigate the association between the TNFA - 376A SNP and MS susceptibility in Argentinean patients with MS. The A/G genotype was found in 4.4% of patients (n=90 and in 4.8% of healthy individuals (n=84; p=0.92; odds ratio=0.93; confidence interval: 0.23- 3.84. Thus, no significant differences in genotype and allele frequencies were found between healthy individuals and patients with MS in Argentina.Un polimorfismo de nucleótido único (SNP, por sus iniciales en inglés en la posición -376 del gen codificante del factor de necrosis tumoral á (TNFA ha sido asociado en España con un mayor riesgo a padecer esclerosis múltiple (EM. Sin embargo, esta asociación no fue encontrada en estudios hechos en poblaciones provenientes de los EE.UU. y Holanda. Aquí investigamos la asociación entre el SNP TNFA -376A y el desarrollo de EM en una población de pacientes argentinos con EM. El genotipo A/G fue encontrado en 4.4% de los pacientes (n=90 y en 4.8% de los controles sanos (n=84; p=0.92; odds ratio=0.93; intervalo de confianza: 0.23-3.84. En consecuencia, no encontramos diferencias en las frecuencias alélicas y genotípicas entre los sujetos enfermos y los controles sanos en Argentina.

  16. Risk factors for syphilis in women: case-control study.

    Science.gov (United States)

    Macêdo, Vilma Costa de; Lira, Pedro Israel Cabral de; Frias, Paulo Germano de; Romaguera, Luciana Maria Delgado; Caires, Silvana de Fátima Ferreira; Ximenes, Ricardo Arraes de Alencar

    2017-08-17

    To determine the sociodemographic, behavioral, and health care factors related to the occurrence of syphilis in women treated at public maternity hospitals. This is a case-control study (239 cases and 322 controls) with women admitted to seven maternity hospitals in the municipality of Recife, Brazil, from July 2013 to July 2014. Eligible women were recruited after the result of the VDRL (Venereal Disease Research Laboratory) under any titration. The selection of cases and controls was based on the result of the serology for syphilis using ELISA (enzyme-linked immunosorbent assay). The independent variables were grouped into: sociodemographic, behavioral, clinical and obstetric history, and health care in prenatal care and maternity hospital. Information was obtained by interview, during hospitalization, with the application of a questionnaire. Odds ratios and 95% confidence intervals were estimated using logistic regression to identify the predicting factors of the variable to be explained. The logistic regression analysis identified as determinant factors for gestational syphilis: education level of incomplete basic education or illiterate (OR = 2.02), lack of access to telephone (OR = 2.4), catholic religion (OR = 1.70 ), four or more pregnancies (OR = 2.2), three or more sexual partners in the last year (OR = 3.1), use of illicit drugs before the age of 18 (OR = 3.0), and use of illicit drugs by the current partner (OR = 1.7). Only one to three prenatal appointments (OR = 3.5) and a previous history of sexually transmitted infection (OR = 9.7) were also identified as determinant factors. Sociodemographic, behavioral, and health care factors are associated with the occurrence of syphilis in women and should be taken into account in the elaboration of universal strategies aimed at the prevention and control of syphilis, but with a focus on situations of greater vulnerability. Determinar os fatores sociodemográficos, comportamentais e de assistência à sa

  17. Factors in Agile Methods Adoption

    Directory of Open Access Journals (Sweden)

    Samia Abdalhamid

    2017-05-01

    Full Text Available There are many factors that can affect the process of adopting Agile methods during software developing. This paper illustrates the critical factors in Agile methods adoption in software organizations. To present the success and failure factors, an exploratory study is carried out among the critical factors of success and failure from existing studies. Dimensions and Factors are introduced utilizing success and failure dimensions. The mind map was used to clarify these factors.

  18. On braid monodromy factorizations

    Energy Technology Data Exchange (ETDEWEB)

    Kharlamov, V M [Institut de Recherche Matematique Avanee Universite Louis Pasteur et CNRS 7 rue Rene Descartes (France); Kulikov, Vik S [Steklov Mathematical Institute, Russian Academy of Sciences (Russian Federation)

    2003-06-30

    We introduce and develop a language of semigroups over the braid groups to study the braid monodromy factorizations (bmf's) of plane algebraic curves and other related objects. As an application, we give a new proof of Orevkov's theorem on the realization of bmf's over a disc by algebraic curves and show that the complexity of such a realization cannot be bounded in terms of the types of factors of the bmf. We also prove that the type of a bmf distinguishes Hurwitz curves with singularities of inseparable type up to H-isotopy and J-holomorphic cuspidal curves in CP{sup 2} up to symplectic isotopy.

  19. Prevalencia y factores asociados a la ideación e intento suicida en adolescentes de educación media superior de la República Mexicana

    Directory of Open Access Journals (Sweden)

    Berenice Pérez- Amezcua

    2010-08-01

    Full Text Available Objetivo. Identificar prevalencias y factores asociados a la ideación e intento suicida en estudiantes adolescentes de México. Material y métodos. Estudio transversal en 12424 adolescentes de escuelas públicas en 2007. Se utilizaron modelos de regresión logística para obtener razones de momios (RM con intervalos de confianza de 95% (IC 95%. Resultados. 47% reportó al menos un síntoma de ideación; 9% refirieron antecedente de intento. Los factores asociados a la conducta suicida fueron: poca confianza en la comunicación hacia los padres (RM=1.30, RM=1.54; abuso sexual (RM=1.92, RM=1.57, sintomatología depresiva (RM=5.36, RM=1.51, consumo de tabaco (RM=1.30, RM=2.57, alcohol (RM=1.60, RM=1.31 y, para las mujeres, haber tenido relaciones sexuales (RM=1.28, RM=1.65. Conclusión. Casi la mitad de los(as estudiantes del nivel medio superior presentaron al menos un síntoma de ideación. Para disminuir esta problemática se deben considerar los factores asociados: el consumo de sustancias adictivas, género, antecedentes de abuso sexual y depresión.Objective. To identify the prevalence of and factors associated with suicidal ideation and intent in adolescent students in Mexico. Material and Methods. A cross-sectional study was conducted with a sample of 12 424 students from public schools in 2007. We used logistic regression to obtain odds ratios (OR with 95% confidence intervals. Results. A total of 47% of the students reported at least one suicidal ideation symptom and 9% reported an antecedent of suicidal intent. Factors associated with suicide ideation and intent include low confidence in communication with parents (OR=1.30; OR=1.54, sexual abuse (OR=1.92; OR=1.57, depressive symptoms (OR=5.36; OR=1.51, tobacco use (OR=1.30; OR=2.57, alcohol use (OR=1.60; OR=1.31 and, for women, having had sexual relations (OR=1.28; OR=1.65. Conclusions. Roughly 50% of high school students had at least one symptom of suicidal ideation. To lessen this

  20. Molecular factors in migraine

    OpenAIRE

    Kowalska, Marta; Prendecki, Micha?; Kozubski, Wojciech; Lianeri, Margarita; Dorszewska, Jolanta

    2016-01-01

    Migraine is a common neurological disorder that affects 11% of adults worldwide. This disease most likely has a neurovascular origin. Migraine with aura (MA) and more common form - migraine without aura (MO) ? are the two main clinical subtypes of disease. The exact pathomechanism of migraine is still unknown, but it is thought that both genetic and environmental factors are involved in this pathological process. The first genetic studies of migraine were focused on the rare subtype of MA: fa...

  1. Factors Influencing Army Maintenance

    Science.gov (United States)

    1989-01-01

    Harz (1981), reports the results of questioning largc- numbers of Subject Matter Experts (SMEs) involved in the maintenance process. The second type of...identified maintenance problems (e.g., Kokenes, 1987; Harz , 1981). The second step was the identificatl i of demand factors that affect the actual...Kokenes, 1987; Harz , 1981). Second, if any of the data on which allocations are based are faulty, or budgetary decisions require a cutback in

  2. Power factor controllers

    International Nuclear Information System (INIS)

    1982-01-01

    The power factor controller (PFC) is a solid state electronic device that reduces excessive energy waste in ac induction motors. The significance of the PFC lies in the fact that nearly a billion induction motors are used daily. The PFC is applicable to both single phase and three phase induction motors. Since it is connected to the power lines of the motor and requires no modification to the motor itself, it may be applied to existing motors as well as to new installations

  3. Factors of academic procrastination

    OpenAIRE

    Kranjec, Eva; Košir, Katja; Komidar, Luka

    2017-01-01

    This study investigated dimensions of perfectionism, anxiety, and depression as factors of academic procrastination. Our main research interest was to examine the role of specific dimensions of perfectionism as moderators in the relationship between anxiety and depression and academic procrastination. Four scales were administered on the sample of 403 students: perfectionism scale FMPS, academic procrastination scale APS-SI, depression scale CESD and anxiety scale STAI-X2. The results showed ...

  4. Bayesian Factor Analysis.

    Science.gov (United States)

    1985-03-23

    Fundamantal Factors of Comprehension in...8217’"" . " *. . . . • * • "• "". . . . " . . . . • . . # • • • . .° - -.... . ... .. . . . . . . . . ................. 1 ,,.,..,*, University of Iowa/Novick 8 March 1985 Dr. James McBride Program Manager for Manpower, Psychological...Princeton, NJ 08541 Dr. Vern W. Urry Dr. Peter Stoloff Personnel R&D Center Center for Naval Analysis Office of Personnel Management 200 North

  5. Prognostic factors for medulloblastoma

    International Nuclear Information System (INIS)

    Jenkin, Derek; Al Shabanah, Mohamed; Al Shail, Essam; Gray, Alan; Hassounah, Maher; Khafaga, Yasser; Kofide, Amani; Mustafa, Mahmoud; Schultz, Henrik

    2000-01-01

    Purpose: To evaluate prognostic factors for medulloblastoma. Methods and Materials: One hundred and seventy-three consecutive patients with medulloblastoma, treated at King Faisal Specialist Hospital (KFSH) from 1988-1997, were reviewed. Eighty-four percent were children less than 15 years old. From 1988-1994, treatment was at the discretion of the investigator. From 1994-1998, patients entered a single-arm best practice protocol in which, in staged patients, the surgical intent was total resection, standard radiation treatment was defined, and adjuvant chemotherapy was given to a 'high-risk' subset. Results: For 150 patients who completed surgical and radiation treatment, the 5-year survival rate was 58%, compared with 0% for 16 patients who were unable to start or complete radiation treatment. For staged patients, the 5-year survival was M0 + M1, 78% and M2 + M3, 21% (p 14 years and gross cystic/necrotic features in the primary tumor. The size of the primary tumor, the degree of hydrocephalus at diagnosis, the presence of residual tumor in the post-operative CT/MRI, and the functional status of the patient prior to radiation treatment were not significant factors. Conclusions: Stage M0 + M1 was the most powerful favorable prognostic factor. In Saudi Arabia more patients present with advanced disseminated disease, 41% M2 + M3, than in the West, and this impacts adversely on overall survival. Total resection and standard radiation treatment were not sensitive prognostic factors in a treatment environment in which 78% of patients underwent at least 90% tumor resection and 60% received standard radiation treatment. In order to improve the proportion of patients able to complete radiation treatment, consideration should be given to limiting resection when the attainment of total resection is likely to be morbid, and to delaying rather than omitting radiation treatment in the patient severely compromised postoperatively

  6. Eukaryotic transcription factors

    DEFF Research Database (Denmark)

    Staby, Lasse; O'Shea, Charlotte; Willemoës, Martin

    2017-01-01

    Gene-specific transcription factors (TFs) are key regulatory components of signaling pathways, controlling, for example, cell growth, development, and stress responses. Their biological functions are determined by their molecular structures, as exemplified by their structured DNA-binding domains...... them to participate in large interactomes, how they use only a few hydrophobic residues, short sequence motifs, prestructured motifs, and coupled folding and binding for their interactions with co-activators, and how their accessibility to post-translational modification affects their interactions...

  7. Power Factor Controller

    Science.gov (United States)

    1997-01-01

    Frank Nola invented the Power Factor Controller (PFC) at Marshall Space Flight Center more than a decade ago. Nola came up with a way to curb power wastage in AC induction motors. The PFC matches voltage with the motor's actual need by continuously sensing shifts between voltage and current. When it senses a light load it cuts the voltage to the minimum needed. Potential energy savings range from 8 to 65 percent.

  8. Risk factors for cancer

    International Nuclear Information System (INIS)

    Lyman, G.H.

    1992-01-01

    It is no longer reasonable to divide cancers into those that are genetic in origin and those that are environmental in origin. With rare exception, carcinogenesis involves environmental factors that directly or indirectly exert a change in the cell's genome. Virtually all causes of cancer are multifactorial, sometimes involving an inherited predisposition to the carcinogenic effects of environmental factors, which include chemicals, ionizing radiation, and oncogenic virus. Carcinogenesis is a multistep process including induction, promotion, and progression. Initiation requires an irreversible change in the cellular genome, whereas promotion is commonly associated with prolonged and reversible exposure. Tumor progression results in genotypic and phenotypic changes associated with tumor growth, invasion, and metastasis. Most information on human cancer risk is based on epidemiologic studies involving both exposed and unexposed individuals. The quality of such studies depends on their ability to assess the strength of any association of exposure and disease and careful attention to any potential bias. Few cancers are inherited in a Mendelian fashion. Several preneoplastic conditions, however, are clearly inherited and several malignancies demonstrate weak familial patterns. Environmental factors may exert their effect on DNA in a random fashion, but certain consistent changes, including specific translocations of genetic information, are often found. Currently, there is great interest in the close proximity of certain oncogenes governing growth control to the consistent chromosomal changes observed. Such changes may represent a final common pathway of action for environmental carcinogens. Sufficient laboratory and epidemiologic evidence exists to establish a causal association of several chemical agents with cancer

  9. Human Factors Review Plan

    International Nuclear Information System (INIS)

    Paramore, B.; Peterson, L.R.

    1985-12-01

    ''Human Factors'' is concerned with the incorporation of human user considerations into a system in order to maximize human reliability and reduce errors. This Review Plan is intended to assist in the assessment of human factors conditions in existing DOE facilities. In addition to specifying assessment methodologies, the plan describes techniques for improving conditions which are found to not adequately support reliable human performance. The following topics are addressed: (1) selection of areas for review describes techniques for needs assessment to assist in selecting and prioritizing areas for review; (2) human factors engineering review is concerned with optimizing the interfaces between people and equipment and people and their work environment; (3) procedures review evaluates completeness and accuracy of procedures, as well as their usability and management; (4) organizational interface review is concerned with communication and coordination between all levels of an organization; and (5) training review evaluates training program criteria such as those involving: trainee selection, qualification of training staff, content and conduct of training, requalification training, and program management

  10. Human Factors Review Plan

    Energy Technology Data Exchange (ETDEWEB)

    Paramore, B.; Peterson, L.R. (eds.)

    1985-12-01

    ''Human Factors'' is concerned with the incorporation of human user considerations into a system in order to maximize human reliability and reduce errors. This Review Plan is intended to assist in the assessment of human factors conditions in existing DOE facilities. In addition to specifying assessment methodologies, the plan describes techniques for improving conditions which are found to not adequately support reliable human performance. The following topics are addressed: (1) selection of areas for review describes techniques for needs assessment to assist in selecting and prioritizing areas for review; (2) human factors engineering review is concerned with optimizing the interfaces between people and equipment and people and their work environment; (3) procedures review evaluates completeness and accuracy of procedures, as well as their usability and management; (4) organizational interface review is concerned with communication and coordination between all levels of an organization; and (5) training review evaluates training program criteria such as those involving: trainee selection, qualification of training staff, content and conduct of training, requalification training, and program management.

  11. Molecular factors in migraine

    Science.gov (United States)

    Kowalska, Marta; Prendecki, Michał; Kozubski, Wojciech; Lianeri, Margarita; Dorszewska, Jolanta

    2016-01-01

    Migraine is a common neurological disorder that affects 11% of adults worldwide. This disease most likely has a neurovascular origin. Migraine with aura (MA) and more common form - migraine without aura (MO) – are the two main clinical subtypes of disease. The exact pathomechanism of migraine is still unknown, but it is thought that both genetic and environmental factors are involved in this pathological process. The first genetic studies of migraine were focused on the rare subtype of MA: familial hemiplegic migraine (FHM). The genes analysed in familial and sporadic migraine are: MTHFR, KCNK18, HCRTR1, SLC6A4, STX1A, GRIA1 and GRIA3. It is possible that migraine is a multifactorial disease with polygenic influence. Recent studies have shown that the pathomechanisms of migraine involves both factors responsible for immune response and oxidative stress such as: cytokines, tyrosine metabolism, homocysteine; and factors associated with pain transmission and emotions e.g.: serotonin, hypocretin-1, calcitonin gene-related peptide, glutamate. The correlations between genetic variants of the HCRTR1 gene, the polymorphism 5-HTTLPR and hypocretin-1, and serotonin were observed. It is known that serotonin inhibits the activity of hypocretin neurons and may affect the appearance of the aura during migraine attack. The understanding of the molecular mechanisms of migraine, including genotype-phenotype correlations, may contribute to finding markers important for the diagnosis and treatment of this disease. PMID:27191890

  12. Human and Organizational Factors

    International Nuclear Information System (INIS)

    Eshiett, P.B.S.

    2016-01-01

    The Human and Organizational Factors Approach to Industrial Safety (HOFS) consists of identifying and putting in place conditions which encourage a positive contribution from operators (individually and in a team) with regards to industrial safety. The knowledge offered by the HOFS approach makes it possible better to understand what conditions human activity and to act on the design of occupational situations and the organization, in the aim of creating the conditions for safe work. Efforts made in this area can also lead to an improvement in results in terms of the quality of production or occupational safety (incidence and seriousness rates) (Daniellou, F., et al., 2011). Research on industrial accidents shows that they rarely happen as a result of a single event, but rather emerge from the accumulation of several, often seemingly trivial, malfunctions, misunderstandings, incorrect assumptions and other issues. The nuclear community has established rigorous international safety standards and concepts to ensure the protection of people and the environment from harmful effects of ionizing radiation (IAEA, 2014). A review of major human induced disasters in a number of countries and in different industries yields insights into several of the human and organizational factors involved in their occurrence. Some of these factors relate to failures in: • Design or technology; • Training; • Decision making; • Communication; • Preparation for the unexpected; • Understanding of organizational interdependencies

  13. Human factoring administrative procedures

    International Nuclear Information System (INIS)

    Grider, D.A.; Sturdivant, M.H.

    1991-01-01

    In nonnuclear business, administrative procedures bring to mind such mundane topics as filing correspondence and scheduling vacation time. In the nuclear industry, on the other hand, administrative procedures play a vital role in assuring the safe operation of a facility. For some time now, industry focus has been on improving technical procedures. Significant efforts are under way to produce technical procedure requires that a validated technical, regulatory, and administrative basis be developed and that the technical process be established for each procedure. Producing usable technical procedures requires that procedure presentation be engineered to the same human factors principles used in control room design. The vital safety role of administrative procedures requires that they be just as sound, just a rigorously formulated, and documented as technical procedures. Procedure programs at the Tennessee Valley Authority and at Boston Edison's Pilgrim Station demonstrate that human factors engineering techniques can be applied effectively to technical procedures. With a few modifications, those same techniques can be used to produce more effective administrative procedures. Efforts are under way at the US Department of Energy Nuclear Weapons Complex and at some utilities (Boston Edison, for instance) to apply human factors engineering to administrative procedures: The techniques being adapted include the following

  14. The focus factor

    DEFF Research Database (Denmark)

    Nicolaisen, Jeppe; Frandsen, Tove Faber

    2015-01-01

    Introduction. We present a new bibliometric indicator to measure journal specialisation over time, named the focus factor. This new indicator is based on bibliographic coupling and counts the percentage of re-citations given in subsequent years. Method. The applicability of the new indicator is d...... on either simple citation analysis or bibliographic coupling are found to be close relatives. Measures based on journal self-citation are found to be only weakly correlated with the focus factor. Measures based on co-citation analysis remain to be studied and compared.......Introduction. We present a new bibliometric indicator to measure journal specialisation over time, named the focus factor. This new indicator is based on bibliographic coupling and counts the percentage of re-citations given in subsequent years. Method. The applicability of the new indicator...... is demonstrated on a selection of general science journals and on a selection of medical journals. The reference lists of each journal are compared year by year, and the percentage of re-citations is calculated by dividing the number of re-citations with the total number of citations each year. Analysis...

  15. Prevalência de dor crônica e fatores associados na população de Salvador, Bahia Prevalencia de dolor crónico y factores asociados en la población de Salvador, Bahia Prevalence of chronic pain and associated factors in the population of Salvador, Bahia

    Directory of Open Access Journals (Sweden)

    Katia Sá

    2009-08-01

    Full Text Available OBJETIVO: Estimar a prevalência de dor crônica, identificando os fatores associados. MÉTODOS: Estudo transversal realizado em amostra populacional de 2.297 indivíduos com idade igual ou superior a 20 anos, em Salvador (BA, em 1999 e 2000. Aplicou-se em domicílio questionário padronizado para coleta de dados sobre dor e características sociodemográficas e a medida da circunferência abdominal. O critério para classificação de dor crônica foi duração superior a seis meses. Foram estimadas as prevalências de dor por razão de prevalência ajustada com intervalo com 95% de confiança e valor de pOBJETIVO: Estimar la prevalencia de dolor crónico, identificando los factores asociados. MÉTODOS: Estudio transversal realizado en muestra poblacional de 2.297 individuos con edad igual o superior a 20 años, en Salvador (Noreste de Brasil, en 1999 y 2000. Se aplicó en domicilio cuestionario estandarizado para colectar datos sobre dolor y características sociodemográficas y la medida de la circunferencia abdominal. El criterio para clasificación de dolor crónico fue duración superior a seis meses. Fueron estimadas las prevalencias de dolor por razón de prevalencia ajustada con intervalo con 95% de confianza y valor de pOBJECTIVE: To estimate the prevalence of chronic pain, identifying the associated factors. METHODS: A cross-sectional study was conducted in a population sample of 2,297 individuals aged 20 years or more, in Salvador, Northeastern Brazil, in 1999 and 2000. A standardized questionnaire was administered at the individuals' home to collect data about pain, sociodemographic characteristics, and abdominal circumference measurement. The criterion for chronic pain classification was duration above six months. Prevalence of pain was estimated by adjusted prevalence ratio with confidence interval of 95% and p<0.05 for the univariate analyses and logistic regression. RESULTS: The presence of chronic pain was found in 41.4% of the

  16. -Bioactive factors in milk-.

    Science.gov (United States)

    Buts, J P

    1998-03-01

    Human milk as well as the milk of several mammalian species contains, beside major nutrients and anti-infectious and immunocompetent substances, a group of biologically active substances called "milk-borne trophic factors" or "growth modulators". Milk-borne trophic can be classified into three groups: hormones and trophic peptides; nucleotides, nucleosides and derived substances; and polyamines, especially spermine and spermidine. Certain hormones and peptides such as growth hormone, insulin, insulin like-growth factor I (IGF-I), epidermal growth factor (EGF), prolactin and growth hormone releasing factor (GHRF) can influence directly newborn's metabolism after intestinal absorption and promote growth and differentiation of several organs and target tissues. They could exert a cytoprotective effect against toxins and toxic substances and reduce the potential risk of necrotizing enterocolitis. Nucleotides are present in human milk at high levels, and are precursors of nucleic acids, which implies that they can enhance growth and differentiation of several organs and tissues, especially the liver. Nucleotides from milk enhance lipid metabolism, lipoprotein synthesis and liver cell function and regeneration. In addition, they have a determinant action on the development of the gut associated lymphoid tissue (GALT). Lastly, polyamines, mainly spermine and spermidine, are polycationic substances virtually present in all cells, whose concentration in human milk is about ten times higher than in infant formulae. In addition, spermine and spermidine levels increase markedly during the first 3 days of lactation reaching, after 1 week, plateau levels which are respectively 12 and eight times higher than the levels measured at day 0. Although several experimental studies have shown that polyamines from the milk of lactating mammals determine important mitogenic, metabolic and immunological effects promoting growth and differentiation of the immature gastrointestinal tract of

  17. Cross-culturally recurrent personality factors : Analyses of three factors

    NARCIS (Netherlands)

    De Raad, B.; Peabody, D

    This study proceeds from an earlier one that examined the 'Big Five' factors (Peabody & De Raad, 2002). That study considered the substantive nature of five factors from six European psycholexical studies. The results supported Big Five Factor III (Conscientiousness), but Factors I (Extraversion)

  18. Factores socioacadémicos, estilo de aprendizaje, nivel intelectual y su relación con el rendimiento académico previo de médicos internos de pregrado

    Directory of Open Access Journals (Sweden)

    J.L. Padierna-Luna

    Full Text Available Introducción. El aprendizaje es una actividad compleja, en la que intervienen factores individuales, sociales-culturales y académicos. Objetivo. Describir factores socioacadémicos, estilos de aprendizaje, nivel intelectual y su relación con el rendimiento académico previo (promedio de los médicos internos de pregrado (MIP. Sujetos y métodos. Se realizó una encuesta transversal analítica a MIP aplicando tres cuestionarios: datos socioacadémicos, cuestionario CHAEA (estilos de aprendizaje y test de Raven para adultos (nivel intelectual. La muestra incluyó 174 alumnos procedentes de nueve universidades, tres privadas (n = 43; 24,7% y seis públicas (n = 131; 75,29%. Se utilizó estadística descriptiva y regresión múltiple para establecer asociaciones entre variables. Resultados y conclusiones. Predominó el género femenino, con el 59,2% (n = 103, frente al masculino, con el 40,8% (n = 71. El promedio de edad fue de 23,63 años, con un rango de 21 a 33. No hubo diferencias significativas de género en el rendimiento previo (8,21 frente a 8,25. Se midió la relación entre los factores socioacadémicos, estilos de aprendizaje y nivel intelectual con el rendimiento académico, con un intervalo de confianza del 95%. De los datos socioacadémicos, sólo la edad se relaciona inversamente con el rendimiento, con r = 0,2 y p < 0,001. El estilo de aprendizaje no guarda ninguna relación con el rendimiento. El nivel intelectual se relaciona significativamente con el rendimiento (p < 0,001.

  19. Fatores de risco para doença diarréica no lactente: um estudo caso-controle Risk factors for diarrheal disease in infants: a case-control study

    Directory of Open Access Journals (Sweden)

    Gisélia Alves Pontes da Silva

    2004-04-01

    Full Text Available O objetivo deste estudo foi identificar os fatores de risco associados à presença de episódios diarréicos em lactentes menores de seis meses, residentes na Zona da Mata Meridional do Estado de Pernambuco, Brasil. O desenho do estudo foi do tipo caso-controle, aninhado numa coorte. Foi estudado um total de 397 crianças, sendo 239 casos e 158 controles (1,5:1. Foi calculado o odds ratio(OR, intervalo de confiança (IC de 95%, e realizada análise de regressão logística para identificar fatores preditores da variável a ser explicada. Na análise multivariada, a ausência de água canalizada (OR = 3,60; IC95% 1,49-8,74 e aleitamento materno por menos de 6 meses (OR = 2,06; IC95% 1,26-3,38 foram os fatores significantemente associados com a ocorrência de diarréia, após o ajuste pelas demais variáveis.This study aims to identify risk factors associated with episodes of diarrhea among infants under six months from the Southern Zona da Mata region in the State of Pernambuco, Brazil. This was a case-control study nested in a cohort. A total of 397 infants were studied, with 239 infants classified as cases and 158 as controls (1.5:1. Odds ratios (OR and 95% confidence intervals were calculated. Logistic regression analysis was conducted to identify predictive factors for the outcome, showing that lack of piped water in the house (OR = 3.60; 95% CI 1.49-8.74 and duration of breastfeeding less than six months (OR = 2.06; 95% CI 1.26-3.38 were the significant risk factors associated with occurrence of diarrhea, after adjusting for other variables.

  20. Milestones and Impact Factors

    Directory of Open Access Journals (Sweden)

    Grandjean Philippe

    2010-07-01

    Full Text Available Abstract Environmental Health has just received its first Impact Factor by Thomson ISI. At a level of 2.48, this achievement is quite satisfactory and places Environmental Health in the top 25% of environmental science journals. When the journal was launched in 2002, it was still unclear whether the Open Access publishing model could be made into a viable commercial enterprise within the biomedical field. During the past eight years, Open Access journals have become widely available, although still covering only about 15% of journal titles. Major funding agencies and institutions, including prominent US universities, now require that researchers publish in Open Access journals. Because of the profound role of scientific journals for the sharing of results and communication between researchers, the advent of Open Access may be of as much significance as the transition from handwriting to printing via moveable type. As Environmental Health is an electronic Open Access journal, the numbers of downloads at the journal website can be retrieved. The top-20 list of articles most frequently accessed shows that all of them have been downloaded over 10,000 times. Back in 2002, the first article published was accessed only 49 times during the following month. A year later, the server had over 1,000 downloads per month, and now the total number of monthly downloads approaches 50,000. These statistics complement the Impact Factor and confirm the viability of Open Access in our field of research. The advent of digital media and its decentralized mode of distribution - the internet - have dramatically changed the control and financing of scientific information dissemination, while facilitating peer review, accelerating editorial handling, and supporting much needed transparency. Both the meaning and means of "having an impact" are therefore changing, as will the degree and way in which scientific journals remain "factors" in that impact.

  1. Factor 4 planning

    International Nuclear Information System (INIS)

    Bariol-Mathais, Brigitte; Lavoillotte, Philippine; Gall-Sorrentino, Florence; Malez, Marianne; Sanna, Daniela; Marsauche, Maud; Marquet, Sarah; Debergue, Sophie; Aminu, Olufunmi; Bernard, Helene; Marchand, Jean-Michel; Blin, Frederic; Grange, Jerome; Caillierez, Sophie; Muller, Dania; Clement, Bob; Desire, Jean-Charles; Metais, Benedicte; Lannuzel, Philippe; Pezet-Kuhn, Murielle; Pons, Anne; Rivoire-Meley, Benedicte; Tissot, Heloise

    2015-07-01

    Factor 4 is the goal of cutting our greenhouse gas emissions by 75% by 2050. Achieving this objective will necessitate radical changes in our practices, in particular concerning transport and housing; the measures currently implemented, such as positive-energy buildings, low-impact mobility and eco-neighbourhoods, will not be enough to meet this goal. These measures must be conceived in the framework of broad territorial planning that integrates environmental and energy objectives far upstream. To this end, the French Environment and Energy Management Agency (ADEME) and the French network of Urban Planning Agencies (FNAU), pursuing their missions in their respective areas of competence, have joined forces to make infrastructure and land use planning an integral part of the environmental and energy transition process. In 2013, the two organisations signed a partnership agreement and compiled an inventory of practices that are relevant to Factor 4 planning. This work was led by Epures, Saint-etienne urban planning agency, along with FNAU, drawing upon the expertise of a dozen urban planning agencies in precursor territories. This inventory describes the stakes, resources and strengths for each territory, which have led to cross-sectoral territorial planning exercises with ambitious environmental and energy objectives; the importance of evaluation in attaining these goals is emphasised. Current experience, questions and available methodological tools are summarised in this document, to encourage territories and help them design their planning policies along a trajectory to achieve Factor 4 goals. The compilation also aims to be a contribution to the COP21 climate conference

  2. Improved Balanced Incomplete Factorization

    Czech Academy of Sciences Publication Activity Database

    Bru, R.; Marín, J.; Mas, J.; Tůma, Miroslav

    2010-01-01

    Roč. 31, č. 5 (2010), s. 2431-2452 ISSN 0895-4798 R&D Projects: GA AV ČR IAA100300802 Grant - others:GA AV ČR(CZ) M100300902 Institutional research plan: CEZ:AV0Z10300504 Source of funding: I - inštitucionálna podpora na rozvoj VO Keywords : preconditioned iterative methods * sparse matrices * incomplete decompositions * approximate inverses * Sherman-Morrison formula * nonsymmetric matrices Subject RIV: BA - General Mathematics Impact factor: 1.725, year: 2010

  3. Accidents and human factors

    International Nuclear Information System (INIS)

    Nishiwaki, Y.; Kawai, H.; Morishima, H.; Terano, T.; Sugeno, M.

    1984-01-01

    When the TMI accident occurred it was 4 a.m., an hour when the error potential of the operators would have been very high. The frequency of car and train accidents in Japan is also highest between 4 a.m. and 6 a.m. The error potential may be classified into five phases corresponding to the electroencephalogramic pattern (EEG). At phase 0, when the delta wave appears, a person is unconscious and in deep sleep; at phase I, when the theta wave appears, he is very tired, sleepy and subnormal; at phase II, when the alpha wave appears, he is normal, relaxed and passive; at phase III, when the beta wave appears, he is normal, clear-minded and active; at phase IV, when the strong beta or epileptic wave appears, he is hypernormal, excited and incapable of normal judgement. Should an accident occur at phase II, the brain condition may jump to phase IV. At this phase the error or accident potential is maximum. The response of the human brain to different types of noises and signals may vary somewhat for different individuals and for different groups of people. Therefore, the possibility that such differences in brain functions may influence the mental structure would be worthy of consideration in human factors and in the design of man-machine systems. Human reliability and performance would be affected by many factors: medical, physiological and psychological, etc. The uncertainty involved in human factors may not necessarily be probabilistic, but fuzzy. Therefore, it would be important to develop a theory by which both non-probabilistic uncertainties, or fuzziness, of human factors and the probabilistic properties of machines can be treated consistently. From the mathematical point of view, probabilistic measure is considered a special case of fuzzy measure. Therefore, fuzzy set theory seems to be an effective tool for analysing man-machine systems. To minimize human error and the possibility of accidents, new safety systems should not only back up man and make up for his

  4. Perinatal risk factors for strabismus

    DEFF Research Database (Denmark)

    Torp-Pedersen, Tobias; Boyd, Heather A; Poulsen, Gry

    2010-01-01

    Little is known about the aetiological factors underlying strabismus. We undertook a large cohort study to investigate perinatal risk factors for strabismus, overall and by subtype.......Little is known about the aetiological factors underlying strabismus. We undertook a large cohort study to investigate perinatal risk factors for strabismus, overall and by subtype....

  5. Risk Factors for Eating Disorders

    Science.gov (United States)

    Striegel-Moore, Ruth H.; Bulik, Cynthia M.

    2007-01-01

    The authors review research on risk factors for eating disorders, restricting their focus to studies in which clear precedence of the hypothesized risk factor over onset of the disorder is established. They illustrate how studies of sociocultural risk factors and biological factors have progressed on parallel tracks and propose that major advances…

  6. Conhecimento dos clientes com tuberculose pulmonar e seus familiares sobre adesão ao tratamento e fatores associados, no município do Rio Grande (RS Knowledge of clients who suffer of pulmonary tuberculosis and their family members concerning the adherence of the treatment and associated factors in Rio Grande, Rio Grande do Sul State

    Directory of Open Access Journals (Sweden)

    Silvana Monteiro Costa

    2011-01-01

    Full Text Available Este estudo transversal objetivou determinar a prevalência de conhecimento sobre adesão ao tratamento da tuberculose que os clientes com tuberculose pulmonar e seus familiares possuem acerca desta doença e fatores associados. Foram entrevistados os portadores de tuberculose atendidos no Programa de Controle da Tuberculose do Rio Grande (RS e seus familiares, totalizando 150 clientes, sendo 68 portadores e 82 familiares dos mesmos. A prevalência de conhecimento foi de 60%. A análise multivariada mostrou que o conhecimento sobre adesão esteve associado com a condição de ser portador (razão de prevalência: 1,64; intervalo de confiança de 95%:1,25-2,15 e com o fato de já ter existido um caso da doença na família (razão de prevalência: 1,33; intervalo de confiança de 95%:1,04-1,70. Constata-se que o conhecimento sobre adesão é baixo, evidenciando-se assim a necessidade de ações educativas aos enfermos, familiares e comunidade.This cross sectional study aimed at the determination of the prevalence of the knowledge about the adherence to the tuberculosis treatment that clients suffering of pulmonary tuberculosis and their families have concerning this disease and associated factors. A total of 68 tuberculosis clients who attended the Tuberculosis Control Program in Rio Grande, Rio Grande do Sul State, and 82 of their family members were interviewed, totalizing 150 clients. The prevalence of the knowledge was 60%. The multivariate analysis has showed a meaningful association between the adherence knowledge and the condition of being a tuberculosis client (prevalence ratio: 1.64, confidence intervals 95%: 1.25-2.15 and with the fact of the existence of one case in the family (prevalence ratio: 1.33; confidence intervals 95%: 1.04-1.70. It is observed that the adherence knowledge is low, making it clear the need for educational actions for sick people, family members and the community.

  7. Activation of human factor V by factor Xa and thrombin

    International Nuclear Information System (INIS)

    Monkovic, D.D.; Tracy, P.B.

    1990-01-01

    The activation of human factor V by factor Xa and thrombin was studied by functional assessment of cofactor activity and sodium dodecyl sulfate-polycarylamide gel electrophoresis followed by either autoradiography of 125 I-labeled factor V activation products or Western blot analyses of unlabeled factor V activation products. Cofactor activity was measured by the ability of the factor V/Va peptides to support the activation of prothrombin. The factor Xa catalyzed cleavage of factor V was observed to be time, phospholipid, and calcium ion dependent, yielding a cofactor with activity equal to that of thrombin-activated factor V (factor Va). The cleavage pattern differed markedly from the one observed in the bovine system. The factor Xa activated factor V subunits expressing cofactor activity were isolated and found to consist of peptides of M r 220,000 and 105,000. Although thrombin cleaved the M r 220,000 peptide to yield peptides previously shown to be products of thrombin activation, cofactor activity did not increase. N-Terminal sequence analysis confirmed that both factor Xa and thrombin cleave factor V at the same bond to generate the M r 220,000 peptide. The factor Xa dependent functional assessment of 125 I-labeled factor V coupled with densitometric analyses of the cleavage products indicated that the cofactor activity of factor Xa activated factor V closely paralleled the appearance of the M r 220,000 peptide. The data indicate that factor Xa is as efficient an enzyme toward factor V as thrombin

  8. FACTORES ASOCIADOS A SÍNDROME DE ASPIRACIÓN MECONIAL EN EL HOSPITAL JOSÉ CAYETANO HEREDIA PIURA-PERÚ

    Directory of Open Access Journals (Sweden)

    Nelson David Purizaca Rosillo

    2011-01-01

    Full Text Available Objetivo: Determinar los principales factores de riesgo en recién nacidos asociados a la presencia de síndrome de aspiración meconial (SAM. Métodos: Estudio de casos y controles realizado en el Hospital José Cayetano Heredia EsSALUD - Piura. La población estuvo conformada por el registro de las historias clínicas de los años 2009-2011. Se definió como caso a los recién nacidos con diagnóstico de SAM y como controles a los 3 recién nacidos siguientes inmediatos al caso que hayan presentado líquido amniótico meconial en el parto. Las variables consideradas fueron las características del líquido meconial, datos del recién nacido (género, peso al nacer, edad gestacional, apgar al minuto y frecuencia cardiaca, datos del parto(tipo de parto, presencia de patología obstétrica y datos de la madre(edad, paridad y grado de instrucción. Se utilizó el OR con un intervalo de confianza del 95% para la medición de riesgo, se aplicó la prueba de chi cuadrado. Para el análisis estadístico se utilizó el software SPSS 18.0. Resultados: Las variables con significancia estadística asociados a SAM fueron: presencia de líquido amniótico meconial espeso (OR=12, IC95% 3.91 - 36.83, Apgar 4 (OR=6.18, IC95% 1.34-28.48. Conclusión: Los factores de riesgo asociados a la presencia de SAM fueron: líquido meconial espeso, Apgar 4. Se recomienda un mayor registro de todos los datos no sólo del recién nacido, sino también del parto y la madre.

  9. Estrés psicosocial y baja resiliencia, un factor de riesgo de hipertensión arterial

    Directory of Open Access Journals (Sweden)

    Lucas Almada

    2010-01-01

    Full Text Available IntroducciónEl estrés psicosocial crónico (EPC fue propuesto como un factor de riesgo cardiovascular (FRC; sin embargo, la complejidad y la falta de medidas objetivas para evaluarlo, unidas al hecho de que no todas las personas reaccionan ante él de igual manera, determinaron que en la actualidad no se cuente con estudios concluyentes al respecto.ObjetivosDeterminar si la baja resiliencia (BR frente al EPC se asocia con hipertensión arterial y daño de órgano blanco en pacientes ambulatorios libres de tratamiento que concurren a realizarse un examen periódico de salud y comprobar si esta asociación tiene relación con el patrón de activación neurohormonal.Material y métodosSe realizó un estudio preliminar, observacional transversal, en el que se enrolaron en forma consecutiva 53 individuos, 32 varones y 21 mujeres. Los pacientes completaron dos cuestionarios: uno para medir EPC y el otro, la Escala de Resiliencia de Connor-Davidson. Quedaron divididos en cuatro grupos: 1, sin EPC y con resiliencia normal (RN; 2, sin EPC y con baja resiliencia (BR; 3, con EPC y RN; 4, con EPC y BR.ResultadosEl porcentaje de hipertensos fue superior en el grupo 4 (p < 0,001, como también el de individuos con incremento de la circunferencia de la cintura (ICC (p = 0,05. Si bien los niveles de noradrenalina, cortisol y ácido vanililmandélico fueron ligeramente superiores en el grupo 4, las diferencias no alcanzaron significación estadística. Para determinar si el EPC unido a BR es un factor de riesgo para el desarrollo de hipertensión arterial se empleó un modelo de regresión logística, controlado por confundidores; el odds ratio fue de 10,9 con intervalos de confianza del 95%, inferior de 1,8 y superior de 65,2.ConclusionesDatos preliminares sugieren que individuos con EPC unido a BR tienen un riesgo alto para el desarrollo de hipertensión arterial.

  10. FACTORES ASOCIADOS AL SOBREPESO Y LA OBESIDAD EN ESCOLARES DE 8 A 9 AÑOS DE BARCELONA

    Directory of Open Access Journals (Sweden)

    Francesca Sánchez-Martínez

    2016-01-01

    Full Text Available Fundamentos: El sobrepeso y la obesidad infantil han aumentado progresivamente en las últimas décadas, especialmente en países del sur de Europa. El objetivo del estudio fue identificar la prevalencia de sobrepeso, obesidad y sus determinantes en escolares de 8-9 años de Barcelona. Métodos: Estudio transversal descriptivo de una muestra representativa de 3.262 escolares en 2011. Se calculó el Índice de Masa Corporal (IMC siguiendo los criterios establecidos por la Organización Mundial de la Salud (z-scores. Se estudiaron variables sobre conducta alimentaria, actividad física y uso de nuevas tecnologías mediante 2 cuestionarios. Se ajustaron modelos de regresión logística, obteniendo odds ratio ajustadas e intervalos de confianza (95%. Resultados: La prevalencia de sobrepeso fue del 24,0% y de obesidad del 12,7%. La obesidad fue significativamente mayor en niños que en niñas (14,8% vs. 10,8%. No se observaron diferencias estadísticamente significativas según IMC en el cumplimiento de las recomendaciones de práctica de actividad física ni uso de nuevas tecnologías. Los factores asociados a la obesidad en niños fueron asistir a escuela situada en barrios de nivel socioeconómico desfavorable [ORa=1,88 (1,35-2,63], pertenecer a familia inmigrante [ORa=1,57 (1,12- 2,20], no comer en el colegio [ORa=1,76 (1,20-2,59] y hacer alguna comida solo [ORa=1,95 (1,27-3,00]. En niñas fueron pertenecer a familia monoparental [ORa=1,58 (1,06-2,34] y familia inmigrante [ORa=1,53 (1,07-2,18]. Conclusiones: La prevalencia de obesidad infantil en Barcelona es alta. Es más frecuente en niños, siendo los determinantes sociales los factores asociados de mayor relevancia.

  11. Organizational factors in Korean NPPs

    International Nuclear Information System (INIS)

    Jang, D. J.; Kim, Y. I.; Jeong, C. H.; Kim, J. W.

    2003-01-01

    Organizational factors are referred to as the factors that influence the achievement of a goal of an organization. Latent problems of an organization could contribute to causing human errors in such stages as design, operation and maintenance, and furthermore, leading to an severe accident. In order to evaluate an organization from the safety viewpoint, it is necessary to identify the organizational factors in a systematic fashion. In this paper, some efforts to identify the organizational factors in Korean NPPs are presented. The study was performed in the following steps: 1) Reviewing the definitions and range of the organizational factors used by the previous 13 researches, 2) Structuring the organizational factors by screening and collating factors, 3) Analysing the organizational factors that is considered to have contributed to the trip events based on the trip report of Korean NPPs, 4) Suggesting a more reliable taxonomy of organizational factors for event analysis by applying the Onion Structure Model to the selected factors

  12. Factores de riesgo para el neonato pequeño para la edad gestacional en un hospital de Lima, Perú

    Directory of Open Access Journals (Sweden)

    J. Eduardo Tejeda-Mariaca

    Full Text Available Objetivos. Identificar factores de riesgo para neonatos a término pequeños para la edad gestacional. Materiales y métodos. Cohorte retrospectiva que utilizó datos del Sistema Informático Materno Perinatal del Hospital María Auxiliadora de Lima, del período 2000 a 2010. Se evaluó la edad materna, paridad, nivel educativo, estado civil, índice de masa corporal pregestacional, número de controles prenatales, presencia de patologías como preeclampsia, eclampsia, infección urinaria y diabetes gestacional como factores de riesgo en pequeños para edad gestacional. El peso para la edad gestacional fue calculado sobre la base de percentiles peruanos. Se calcularon los riesgos relativos crudos (RR y ajustados (RRa con sus intervalos de confianza al 95% usando modelos lineales generalizados log binomial. Resultados. Se incluyeron 64 670 gestantes. La incidencia de pequeños para la edad gestacional fue 7,2%. La preeclampsia (RRa 2,0; IC 95%: 1,86-2,15, eclampsia (RRa 3,22; IC 95%: 2,38-4,35, bajo peso materno (RRa 1,38; IC 95%: 1,23-1,54, nuliparidad (RRa 1,32; IC 95%: 1,23-1,42, edad ≥35 años (RRa 1,16; IC 95%: 1,04-1,29, tener controles prenatales de 0 a 2 (RRa 1,43; IC 95%: 1,32-1,55 y 3 a 5 (RRa 1,22; IC 95%: 1,14-1,32 fueron factores de riesgo para ser pequeños para la edad gestacional. Conclusiones. Es necesario identificar a las gestantes con factores de riesgo como los encontrados para disminuir la condición de pequeños para la edad gestacional. Se debe actuar poniendo énfasis en factores modificables, tales como la frecuencia de sus controles prenatales

  13. Risk Factors in Pemphigus

    Directory of Open Access Journals (Sweden)

    Gülşen Tükenmez Demirc

    2011-09-01

    Full Text Available Background and Design: There have been reports suggesting the involvement of environmental factors in the disease process of pemphigus. In this study, we aimed to find out the risk factors which could play role in the etiopathogenesis in our pemphigus patients.Material and method: A total of 42 patients (15 male and 27 female who were diagnosed as pemphigus with histopathological and direct immunoflurosence examinations in our clinic between the years 1998-2004, were interviewed for assessment of regarding with the subjects of the demographic properties, occupational groups, educational level, the number of pregnancies, stressfull life events, diet habits, smoking and alcohol consumption before the onset of the disease and the results were compared to 42 age and gender-matched controls with similar socioeconomic circumstances. Results: Working in agriculture and livestock, multi-parity, absence of smoking and stressfull life events were found to be statistically significant in pemphigus patients than in controls. Conclusion: Working in agriculture and livestock, multi-parity, absence of smoking and stressfull life events were assumed to play role in the etiopathogenesis and course of pemphigus.

  14. Eclipse telescope design factors

    Science.gov (United States)

    Hull, Tony; Trauger, John T.; Macenka, Steven A.; Moody, Dwight; Olarte, Guillermo; Sepulveda, Cesar; Tsuha, Walter; Cohen, David

    2003-02-01

    Very high contrast imagery, required for exoplanet image acquisition, imposes significantly different criteria upon telescope architecture than do the requirements imposed upon most spaceborne telescopes. For the Eclipse Mission, the fundamental figure-of-merit is a stellar contrast, or brightness reduction ratio, reaching a factor of 10-9 or better at star-planet distances as close as the 4th Airy ring. Factors necessary to achieve such contrast ratios are both irrelevant and largely ignored in contemporary telescope design. Although contemporary telescoeps now meet Hubble Space Telescope performance at substantially lower mass and cost than HST, control of mid-spatial-frequency (MSF) errors, crucial to coronagraphy, has not been emphasized. Accordingly, roughness at MSF has advanced little since HST. Fortunately, HST primary mirror smoothness would nearly satisfy Eclipse requirements, although other aspects of HST are undesirable for stellar coronagraphy. Conversely, the narrow field required for Eclipse eases other drivers of traditional telescope design. A systematic approach to telescope definition, with primary and sub-tier figures-of-merit, will be discussed in the context of the Eclipse Mission.

  15. Alteração vocal auto-referida em professores: prevalência e fatores associados Alteración vocal auto-referida en profesores: prevalencia y factores asociados Self-reported voice problems among teachers: prevalence and associated factors

    Directory of Open Access Journals (Sweden)

    Cláudia Cossentino Bruck Marçal

    2011-06-01

    Full Text Available OBJETIVO: Estimar a prevalência de alteração vocal auto-referida em professores e identificar fatores associados. MÉTODOS: Estudo transversal com amostra de 393 professores do ensino fundamental de Florianópolis, SC, por meio de questionário autoaplicado em 2009. Foi realizada análise multivariável de regressão de Poisson estimando-se as razões de prevalência e intervalos de 95% de confiança. RESULTADOS: A prevalência de alteração vocal foi de 47,6% (IC95% 42,6;52,5. Após o ajuste, permaneceram associados à maior prevalência de alteração vocal ser do sexo feminino e a presença de rinite/sinusite e faringite. CONCLUSÕES: Foi observada elevada prevalência de alteração vocal auto-referida entre os professores estudados.OBJETIVO: Estimar la prevalencia de alteración vocal auto-referida en profesores e identificar factores asociados. MÉTODOS: Estudio transversal con muestra de 393 profesores de enseñanza fundamental de Florianópolis, Sur de Brasil, por medio de cuestionario auto-aplicado en 2009. Se realizó análisis multivariable de regresión de Poisson, estimándose las tasas de prevalencia e intervalos de 95% de confianza. RESULTADOS: La prevalencia de alteración vocal fue de 47,6% (IC95% 42,6;52,5. Posterior al ajuste, permanecieron asociados a la mayor prevalencia de alteración vocal ser del sexo femenino y la presencia de rinitis/sinusitis y faringitis. CONCLUSIONES: Se observó elevada prevalencia de alteración vocal auto-referida entre los profesores estudiados.OBJECTIVE: To estimate the prevalence of self-reported voice problems and to identify associated factors. METHODS: A cross-sectional study was carried out in a sample of 393 public elementary and middle school teachers in Florianópolis, Southern Brazil, in 2009. A self-administered questionnaire was used. A multivariable Poisson regression model was performed to estimate prevalence ratios and their related 95% confidence intervals. RESULTS: The

  16. Prática de futebol e fatores sociodemográficos associados em adolescentes La práctica de fútbol y factores sociodemográficos asociados en adolescentes Soccer practice and associated sociodemographic factors in adolescents

    Directory of Open Access Journals (Sweden)

    Diego Augusto Santos Silva

    2013-03-01

    Full Text Available Objetivou-se verificar a associação entre a prática de futebol com fatores sociodemográficos em escolares. A amostra foi composta por 906 estudantes de escolas públicas de Aracaju, Sergipe, Brasil, com média de 15,11 (DP=2,19 anos de idade. Utilizou-se a regressão de Poisson para o cálculo da razão de prevalência (RP e intervalos de confiança de 95% (IC95%. Dos estudantes investigados, 49,1% não praticavam futebol. Os escolares com maiores probabilidades de não praticar futebol foram os do sexo feminino (RP: 3,28; IC95%: 2,59-4,15 e do ensino médio (RP: 1,45; IC95%: 1,10-1,92. Quase metade dos estudantes não pratica futebol e, independente da faixa etária e nível econômico, em estudantes do sexo feminino e do ensino médio a probabilidade de prática na modalidade é ainda menor.Este estudio evaluó la asociación entre la práctica de fútbol con factores sociodemográficos en los escolares. La muestra está compuesta por 906 estudiantes de escuelas públicas en Aracaju, Sergipe, Brasil, con una media de 15,11 (SD = 2,19 años de edad. Se utilizó la regresión de Poisson para el cálculo de la tasa de prevalencia (RP y los intervalos de confianza del 95% (IC95%. De los estudiantes encuestados, el 49,1% no practica el fútbol. Los niños con más probabilidades de no jugar al fútbol eran mujeres (RP: 3,28, IC95%: 2,59 a 4,15 y de la escuela secundaria (RP: 1,45, IC95%: 1,10 - 1,92. Casi la mitad de los estudiantes no practican el fútbol y sin importar la edad y el nivel económico, las alumnas y los alumnos de la escuela secundaria probablemente a la práctica en el deporte es aún menor.The objective of this study was to evaluate the association between soccer practice and sociodemographic factors in adolescents. The sample consisted of 906 public school students from Aracaju, Sergipe, Brazil, with a mean age of 15.11 (SD=2.19 years. Poisson regression was used to calculate the prevalence ratio (PR and 95% confidence

  17. Pion form factor

    Energy Technology Data Exchange (ETDEWEB)

    Ryong Ji, C.; Pang, A.; Szczepaniak, A. [North Carolina State Univ., Raleigh, NC (United States)

    1994-04-01

    It is pointed out that the correct criterion to define the legal PQCD contribution to the exclusive processes in the lightcone perturbative expansion should be based on the large off-shellness of the lightcone energy in the intermediate states. In the lightcone perturbative QCD calculation of the pion form factor, the authors find that the legal PQCD contribution defined by the lightcone energy cut saturates in the smaller Q{sup 2} region compared to that defined by the gluon four-momentum square cut. This is due to the contribution by the highly off-energy-shell gluons in the end point regions of the phase space, indicating that the gluon four-momentum-square cut may have cut too much to define the legal PQCD.

  18. Psychosomatic factors in pruritus.

    Science.gov (United States)

    Tey, Hong Liang; Wallengren, Joanna; Yosipovitch, Gil

    2013-01-01

    Pruritus and psyche are intricately and reciprocally related, with psychophysiological evidence and psychopathological explanations helping us to understand their complex association. Their interaction may be conceptualized and classified into 3 groups: pruritic diseases with psychiatric sequelae, pruritic diseases aggravated by psychosocial factors, and psychiatric disorders causing pruritus. Management of chronic pruritus is directed at treating the underlying causes and adopting a multidisciplinary approach to address the dermatologic, somatosensory, cognitive, and emotional aspects. Pharmcotherapeutic agents that are useful for chronic pruritus with comorbid depression and/or anxiety comprise selective serotonin reuptake inhibitors, mirtazapine, tricyclic antidepressants (amitriptyline and doxepin), and anticonvulsants (gabapentin, pregabalin); the role of neurokinin receptor-1 antagonists awaits verification. Antipsychotics are required for treating itch and formication associated with schizophrenia and delusion of parasitosis (including Morgellons disease). Copyright © 2013 Elsevier Inc. All rights reserved.

  19. Factorization of Observables

    Science.gov (United States)

    Eliaš, Peter; Frič, Roman

    2017-12-01

    Categorical approach to probability leads to better understanding of basic notions and constructions in generalized (fuzzy, operational, quantum) probability, where observables—dual notions to generalized random variables (statistical maps)—play a major role. First, to avoid inconsistencies, we introduce three categories L, S, and P, the objects and morphisms of which correspond to basic notions of fuzzy probability theory and operational probability theory, and describe their relationships. To illustrate the advantages of categorical approach, we show that two categorical constructions involving observables (related to the representation of generalized random variables via products, or smearing of sharp observables, respectively) can be described as factorizing a morphism into composition of two morphisms having desired properties. We close with a remark concerning products.

  20. Perioperative allergy: risk factors.

    Science.gov (United States)

    Caffarelli, C; Stringari, G; Pajno, G B; Peroni, D G; Franceschini, F; Dello Iacono, I; Bernardini, R

    2011-01-01

    Perioperative anaphylactic as well as anaphylactoid reactions can be elicited by drugs, diagnostic agents, antiseptics, disinfectants and latex. In some individuals, allergic reactions occur in the absence of any evident risk factor. Previous history of specific safe exposure to a product does not permit to exclude the risk of having a reaction. We have systematically reviewed characteristics in the patient's history or clinical parameters that affect the risk of developing reactions during anesthesia. Evidence shows that patients with previous unexplained reaction during anesthesia are at risk for perioperative allergic reactions. An allergic reaction to an agent is associated with previous reaction to a product that is related with the culprit agent. Multiple surgery procedures, professional exposure to latex and allergy to fruit are associated with an increased frequency of latex allergy. It has been shown that in some instances, allergic perioperative reactions may be more common in atopic patients and in females.

  1. Unity power factor converter

    Science.gov (United States)

    Wester, Gene W. (Inventor)

    1980-01-01

    A unity power factor converter capable of effecting either inversion (dc-to-dc) or rectification (ac-to-dc), and capable of providing bilateral power control from a DC source (or load) through an AC transmission line to a DC load (or source) for power flow in either direction, is comprised of comparators for comparing the AC current i with an AC signal i.sub.ref (or its phase inversion) derived from the AC ports to generate control signals to operate a switch control circuit for high speed switching to shape the AC current waveform to a sine waveform, and synchronize it in phase and frequency with the AC voltage at the AC ports, by selectively switching the connections to a series inductor as required to increase or decrease the current i.

  2. Nucleon Electromagnetic Form Factors

    Energy Technology Data Exchange (ETDEWEB)

    Marc Vanderhaeghen; Charles Perdrisat; Vina Punjabi

    2007-10-01

    There has been much activity in the measurement of the elastic electromagnetic proton and neutron form factors in the last decade, and the quality of the data has greatly improved by performing double polarization experiments, in comparison with previous unpolarized data. Here we review the experimental data base in view of the new results for the proton, and neutron, obtained at JLab, MAMI, and MIT-Bates. The rapid evolution of phenomenological models triggered by these high-precision experiments will be discussed, including the recent progress in the determination of the valence quark generalized parton distributions of the nucleon, as well as the steady rate of improvements made in the lattice QCD calculations.

  3. Factores que influyen en la emesis postaturdimiento en bovinos

    Directory of Open Access Journals (Sweden)

    Francisco Gerardo Ríos Rincón

    2012-01-01

    Full Text Available Para determinar el efecto del tiempo de espera pre-sacrificio, la efectividad del aturdimiento, el tipo de categoría comercial y la consistencia del contenido ruminal en la emesis durante el intervalo entre aturdimiento y desangrado en ganado bovino, se seleccionaron 9,446 canales en cuatro plantas procesadoras (P1, P2, P3, P4. El tiempo de espera pre-sacrificio se clasificó en: 1 menor a 3 h (T1; 2 de 3 a 12 h (T2; 3 mayor a 12 h (T3. El aturdimiento se registró como efectivo y no efectivo. La consistencia del contenido ruminal, se clasificó en: acuosa, semi-acuosa y espesa. En P1, se registró el número de cabezas y pulmones contaminados por emesis, y el análisis se realizó mediante X2. Cuando la espera pre-sacrificio fue mayor a 10 h y el aturdimiento no fue efectivo, el riesgo fue 1.73 veces mayor para observar contaminación de la canal. Al aumentar el tiempo de espera pre-sacrificio se incrementó (P<0.05 la emesis, cuando el contenido ruminal era acuoso (62.9 vs 12.5 y 24.6 %. La emesis fue similar (P=0.10; 10.07 % entre machos y hembras. El tiempo de espera pre-sacrificio y la categoría comercial del ganado no influyeron en la emesis post-aturdimiento. Se concluye que el efecto combinado de mayor tiempo de espera pre-sacrificio, aturdimiento no efectivo y consistencia acuosa del contenido ruminal, favorecen la emesis en bovinos durante el intervalo del aturdimiento al desangrado.

  4. Neutron quality factor

    International Nuclear Information System (INIS)

    1995-06-01

    Both the International Commission on Radiological Protection (ICRP) and the National Council on Radiation Protection and Measurements (NCRP) have recommended that the radiation quality weighting factor for neutrons (Q n , or the corresponding new modifying factor, w R ) be increased by a value of two for most radiation protection practices. This means an increase in the recommended value for Q n from a nominal value of 10 to a nominal value of 20. This increase may be interpreted to mean that the biological effectiveness of neutrons is two times greater than previously thought. A decision to increase the value of Q n will have a major impact on the regulations and radiation protection programs of Federal agencies responsible for the protection of radiation workers. Therefore, the purposes of this report are: (1) to examine the general concept of open-quotes quality factorclose quotes (Q) in radiation protection and the rationale for the selection of specific values of Q n ; and (2) to make such recommendations to the Federal agencies, as appropriate. This report is not intended to be an exhaustive review of the scientific literature on the biological effects of neutrons, with the aim of defending a particular value for Q n . Rather, the working group examined the technical issues surrounding the current recommendations of scientific advisory bodies on this matter, with the aim of determining if these recommendations should be adopted by the Federal agencies. Ultimately, the group concluded that there was no compelling basis for a change in Q n . The report was prepared by Federal scientists working under the auspices of the Science Panel of the Committee on Interagency Radiation Research and Policy Coordination (CIRRPC)

  5. Factorization with Gauss sums: scaling properties of ghost factors

    International Nuclear Information System (INIS)

    Stefanak, M; Merkel, W; Schleich, W P; Haase, D; Maier, H

    2007-01-01

    Recent experiments have shown that truncated Gauss sums allow us to find the factors of an integer N. This method relies on the fact that for a factor the absolute value of the Gauss sum is unity. However, for every integer N there exist integers which are not factors, but where the Gauss sum reaches a value which is arbitrarily close to unity. In order to distinguish such ghost factors from real factors we need to amplify this difference. We show that a proper choice of the truncation parameter of the Gauss sum suppresses the ghost factors below a threshold value. We derive the scaling law of the truncation parameter on the number to be factored. Moreover, we show that this scaling law is also necessary for the success of our factorization scheme, even if we relax the threshold or allow limited error tolerance

  6. Depressive symptoms among poor older adults in Mexico: prevalence and associated factors Síntomas depresivos en adultos mayores pobres de México: prevalencia y factores asociados

    Directory of Open Access Journals (Sweden)

    Ietza Bojorquez-Chapela

    2009-07-01

    Full Text Available OBJECTIVE: To describe the presence of depressive symptoms (DS and factors associated with them among poor Mexican older male and female adults (OA. METHODS: A survey was conducted among OA enrolled in a governmental poverty relief program (Oportunidades in Mexico. Participants completed a short version of the Center for Epidemiologic Studies Depression Scale and answered questions about health and life conditions. RESULTS: The prevalence of DS over the cutoff point was 43% (confidence interval (CI 39.5-46.4. DS were associated with different variables among male and female participants. For men, difficulties in performing daily life activities were associated with DS over the cutoff point (odds ratio (OR 2.62, CI 1.58-4.34 and literacy was associated with less DS (OR 0.46, CI 0.31-0.68. For women, difficulties with daily life activities were associated with more DS (OR 2.50, CI 1.57-3.97, and being head of the family was also positively associated (OR 1.81, CI 1.11-2.93. CONCLUSIONS: DS were frequent among this sample of poor OA. The differences between men and women in variables associated with DS highlight the importance of considering the gendered aspects of growing old.OBJETIVO: Describir la presencia de síntomas depresivos (SD y los factores asociados con ellos en adultos y adultas mayores pobres de México. MÉTODOS: Se realizó una encuesta a adultos y adultas mayores registrados en un programa gubernamental de alivio de la pobreza (Oportunidades en México. Los participantes completaron una versión abreviada de la Escala de Depresión del Centro de Estudios Epidemiológicos y respondieron preguntas sobre su salud y condiciones de vida. RESULTADOS: La prevalencia de SD por encima del nivel de corte fue de 43% (intervalo de confianza de 95% [IC95%]: 39,5 a 46,4. Los SD se asociaron con diversas variables en los hombres y mujeres participantes. En hombres, la dificultad para realizar actividades de la vida diaria se asoció con la

  7. Fatores associados à cobertura vacinal em adolescentes Factores asociados a la cobertura por vacunas en adolescentes Factors associated to the vaccination covering in adolescents

    Directory of Open Access Journals (Sweden)

    Ayla Maria Calixto de Carvalho

    2010-01-01

    Full Text Available OBJETIVO: Analisar os fatores associados à condição de estar vacinado entre adolescentes de uma área da Estratégia Saúde da Família de Teresina - PI. MÉTODOS: Estudo de natureza quantitativa e do tipo seccional. A amostra foi constituída por 261 adolescentes e a análise foi realizada por meio da estatística descritiva. RESULTADOS: A cobertura vacinal contra rubéola, sarampo e caxumba foi de 5,4%; para a vacina contra difteria e tétano, foi de 22,9%; para a vacina contra hepatite-B: foi 27,2% e 35,2% para a vacina contra febre amarela. CONCLUSÃO: A baixa cobertura vacinal encontrada neste estudo está relacionada: às oportunidades perdidas de vacinação (65,5%; à deficiência de conhecimento sobre as vacinas, a faixa etária maior de 15 anos (Razão da Prevalência (RP = 2,85; Índice de Confiança (IC 95% = 1,63-4,99; o sexo masculino (RP = 2,04; IC95% =1,15-3,62.OBJETIVO: Analizar los factores asociados a la condición de estar vacunado entre adolescentes, en un área de la Estrategia Salud de la Familia, en la ciudad de Teresina, en el estado de Piauí. MÉTODOS: Estudio de naturaleza cuantitativa y de tipo seccional. La muestra fue constituida por 261 adolescentes y el análisis fue realizado por medio de la estadística descriptiva. RESULTADOS: La cobertura por vacuna contra rubéola, sarampión e caxumba fue de 5,4%; para la vacuna contra la difteria y tétano, fue de 22,9%; para la vacuna contra hepatitis-B, fue 27,2% y de 35,2% para la vacuna contra la fiebre amarilla. CONCLUSIÓN: La baja cobertura por vacunación encontrada en este estudio está relacionada a: 1 las oportunidades perdidas de vacunación (65,5%; a la deficiencia de conocimiento sobre las vacunas, al intervalo de edad mayor de 15 años [Razón de la Prevalencia (RP = 2,85; Índice de Confianza (IC 95% = 1,63-4,99]; al sexo masculino (RP = 2,04; IC95% =1,15-3,62.OBJECTIVE: To analyze the factors associated to the condition of to be vaccinated among

  8. Frecuentación del servicio de urgencias y factores sociodemográficos Use of emergency medical service and sociodemographic factors

    Directory of Open Access Journals (Sweden)

    T. Braun

    2002-04-01

    Full Text Available Objetivos: La utilización por parte de la población de los recursos sanitarios se encuentra relacionada con los niveles de salud y con factores socioeconómicos. Los grupos de población con menor nivel socioeconómico tienen una mayor utilización de determinados recursos sanitarios; los servicios de urgencia podrían presentar un uso diferencial entre los distintos grupos de población. El presente estudio pretende identificar diferencias en el uso de los recursos de atención urgente entre grupos con diferentes características socioeconómicas. Material y métodos: Se realiza un estudio poblacional, en el que mediante el agrupamiento de las secciones censales de la ciudad de Santander, según variables sociodemográficas (edad, nivel de formación y nivel de empleo, se establecen áreas de la ciudad con similares características, mediante análisis de clusters. Se identifica el origen de los pacientes que consultan en el Servicio de Urgencias Hospitalarias (SUH del Hospital Marqués de Valdecilla, y se calcula la tasa de demanda para cada una de las áreas sociodemográficas. Resultados: El análisis de clusters es capaz de identificar cuatro agrupaciones de diferentes características socioeconómicas que se ajustan a barrios de la ciudad de Santander. Se aprecia una mayor utilización del SUH en los grupos sociales más desfavorecidos y de mayor edad media (odds ratio [OR] = 1,91; intervalo de confianza [IC] del 95% 1,73-2,1 de la agrupación 1 con respecto a la 4. La proporción de ingresos es superior en las agrupaciones más favorecidas, mientras que el número de usuarios que realizan visitas repetidas proceden de agrupaciones con menor nivel socioeconómico. Conclusión: La utilización del SUH está condicionada por las características sociodemográficas del área de residencia, identificándose mayor uso entre los grupos de más bajo nivel socioeconómico.Objectives: Health resources utilization is related to health conditions

  9. Factores pronósticos del abandono del tratamiento antituberculoso en una región endémica del Perú Predictive factors for noncompliance with tuberculosis treatment in an endemic region of Peru

    Directory of Open Access Journals (Sweden)

    Dante Roger Culqui

    2005-07-01

    Full Text Available OBJETIVO: Identificar factores de pronóstico del abandono del tratamiento antituberculoso en la provincia de Ica, Perú. MÉTODOS: Entre 1998 y 2000 se llevó a cabo un estudio de casos y testigos (razón numérica de 1:1 en la provincia de Ica. Se identificaron 55 casos de abandono del tratamiento antituberculoso. Los factores evaluados se seleccionaron a partir del modelo del campo de la salud de Lalonde. Las respectivas razones de posibilidades se calcularon por medio de análisis unifactorial y multifactorial. RESULTADOS: Se identificaron como factores pronósticos del abandono del tratamiento anti-tuberculoso los siguientes: considerar insuficiente la información proporcionada por el personal de salud sobre el tratamiento (razón de posibilidades [odds ratio, OR]: 4,20; intervalo de confianza de 95% [IC95%]: 1,77 a 10,02, considerar inadecuados los horarios para recibir el tratamiento (OR: 9,95; IC95%: 1,97 a 50,21 y consumir drogas ilícitas (OR: 7,15; IC95%: 1,69 a 30,23. CONCLUSIONES: Para mejorar el cumplimiento del régimen antituberculoso es necesario brindar a los pacientes información personalizada sobre la enfermedad y su tratamiento, además de ofrecerles horarios flexibles y apropiados para recibirlo. El consumo de drogas es el factor de riesgo más alto de abandono, por lo que resultan cruciales su identificación y seguimiento.OBJECTIVE: To identify factors that predict noncompliance with tuberculosis treatment in the province of Ica, Peru. METHODS: Between 1998 and 2000 a case-control study (1:1 ratio was conducted in the province of Ica, with 55 cases (persons who dropped out of treatment being identified. The factors evaluated were chosen from Lalonde's model of the field of health. The respective odds ratios were calculated by means of univariate analysis and multivariate analysis. RESULTS: The following factors were identified as being predictive of noncompliance with tuberculosis treatment: thinking that the

  10. Identifying the important factors in simulation models with many factors

    NARCIS (Netherlands)

    Bettonvil, B.; Kleijnen, J.P.C.

    1994-01-01

    Simulation models may have many parameters and input variables (together called factors), while only a few factors are really important (parsimony principle). For such models this paper presents an effective and efficient screening technique to identify and estimate those important factors. The

  11. Conditions for factor (in)determinacy in factor analysis

    NARCIS (Netherlands)

    Krijnen, W.P.; Dijkstra, T.K.; Gill, R.D.

    1998-01-01

    The subject of factor indeterminacy has a vast history in factor analysis Wilson Lederman Guttman It has lead to strong dierences in opinion Steiger The current paper gives necessary and sucient conditions for observability of factors in terms of the parameter matrices and a nite number of

  12. Conditions for factor (in)determinacy in factor analysis

    NARCIS (Netherlands)

    Krijnen, W.P.; Dijkstra, T.K.; Gill, R.D.

    1998-01-01

    The subject of factor indeterminacy has a vast history in factor analysis (Guttman, 1955; Lederman, 1938; Wilson, 1928). It has lead to strong differences in opinion (Steiger, 1979). The current paper gives necessary and sufficient conditions for observability of factors in terms of the parameter

  13. Factor Rotation and Standard Errors in Exploratory Factor Analysis

    Science.gov (United States)

    Zhang, Guangjian; Preacher, Kristopher J.

    2015-01-01

    In this article, we report a surprising phenomenon: Oblique CF-varimax and oblique CF-quartimax rotation produced similar point estimates for rotated factor loadings and factor correlations but different standard error estimates in an empirical example. Influences of factor rotation on asymptotic standard errors are investigated using a numerical…

  14. External Factors, Internal Factors and Self-Directed Learning Readiness

    Science.gov (United States)

    Ramli, Nurjannah; Muljono, Pudji; Afendi, Farit M.

    2018-01-01

    There are many factors which affect the level of self-directed learning readiness. This study aims to investigate the relationship between external factors, internal factors and self-directed learning readiness. This study was carried out by using a census method for fourth year students of medical program of Tadulako University. Data were…

  15. Factores de riesgo asociados a la depresión en pacientes de la consulta dermatológica en los hospitales de la ciudad de Barranquilla (Colombia

    Directory of Open Access Journals (Sweden)

    Martha Peñuela

    2004-01-01

    Full Text Available Objetivos: Analizar los factores personales y familiares asociados a la depresión en los pacientes dela consulta externa dermatológica del Hospital Universidad del Norte y del Hospital Nazareth de la ciudad de Barranquilla (Colombia.Materiales y métodos: Se diseñó un estudio transversal (cross sectional en una población de 339 pacientes de la consulta dermatológica. La muestra se seleccionó por muestreo sistemático. Los casos fueron los pacientes a quienes se les detectó algún grado de depresión por medio del Test de Hamiltonpara depresión y los controles, aquellos que resultaron negativos. Entre los factores personales se estudiaron las variables: sexo, estado civil, tiempo de evolución de la enfermedad dermatológica,antecedentes de depresión, presencia de comorbilidad y ocurrencia de pérdidas laborales o afectivas.Los factores familiares analizados fueron los antecedentes de enfermedad psiquiátrica, antecedentes de depresión, funcionalidad familiar. El análisis de los datos se hizo de manera computarizada, y se utilizócomo medidas de asociación la razón de disparidad de prevalencia (POR con su intervalo de confianzay como prueba de significancia el Chi-cuadrado de Mantel Haenszel y la prueba de Fisher.Resultados: Se encontró una fuerte asociación entre la presencia de depresión y los antecedentes personales y familiares de la enfermedad, la evolución prolongada de la enfermedad dermatológica, laspérdidas laborales y afectivas, la presencia de enfermedad concomitante y la disfuncionalidad familiar.Conclusión: Los resultados sugieren que la depresión en los pacientes con trastornos dermatológicos está asociada a la influencia de factores similares a los encontrados en la población general, a lo cual se añade el tiempo de evolución de la enfermedad dermatológica y la disfuncionalidad familiar.

  16. Air Emissions Factors and Quantification

    Science.gov (United States)

    Emissions factors are used in developing air emissions inventories for air quality management decisions and in developing emissions control strategies. This area provides technical information on and support for the use of emissions factors.

  17. What Are the Risk Factors?

    Science.gov (United States)

    ... Stay Informed Cancer Home What Are the Risk Factors for Lung Cancer? Language: English (US) Español (Spanish) ... your cell phone Research has found several risk factors that may increase your chances of getting lung ...

  18. R-Factor for Alaska

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The rainfall-runoff erosivity factor (R-Factor) quantifies the effects of raindrop impacts and reflects the amount and rate of runoff associated with the rain. The...

  19. Factores contribuyentes al desarrollo de infecciones adquiridas en la comunidad en diabéticos tipo 2 admitidos en salas de medicina del Hospital Nacional Cayetano Heredia Factors contributing to the development of community-acquired infections in type-2 diabetics admitted to the Cayetano Heredia National Hospital

    Directory of Open Access Journals (Sweden)

    Gino Guillermo Tapia-Zegarra

    2001-12-01

    Full Text Available El propósito del estudio es identificar factores contribuyentes al desarrollo de infecciones adquiridas en la comunidad en diabéticos tipo 2 hospitalizados. De tal forma, se siguió el diseño de un estudio de casos y controles no apareado. Consecuentemente, se eligieron en forma aleatoria 105 diabéticos con infección adquirida en la comunidad y 105 diabéticos con patología no infecciosa, obtenidos de los Servicios de Medicina de un hospital universitario, entre 1991 y 1998. Mediante el análisis bivariado y multivariado, se obtuvo la estimación ajustada del valor de odds ratio. Los resultados permitieron, según análisis estratificado por edad y sexo, obtener a neuropatía autonómica como factor contribuyente de infecciones urinarias (OR = 4,07. En el modelo multivariado se aisló a vasculopatía periférica (R²: 0,24 como contribuyente de infección de piel y partes blandas (OR = 6,79. Los intervalos de confianza fueron significativos y de 95% de confiabilidad. En conclusión, vasculopatía periférica y vejiga neurogénica contribuyen al desarrollo de infecciones adquiridas en la comunidad en diabéticos tipo 2 hospitalizados.This study aims to identify factors contributing to the development of community-acquired infections in hospitalized type-2 diabetics, using an unmatched case-control design. A total of 105 pairs of diabetic patients with community-acquired infections as compared to non-infectious diseases, respectively, were chosen randomly from the discharge registry of the clinical wards of a teaching hospital from 1991 to 1998. Bivariate and multivariate analysis was conducted with estimation of the adjusted odds ratio. According to stratified analysis controlling for age and sex, autonomic neuropathy proved to be a contributing factor to development of urinary tract infections (OR = 4.07. In the multivariate model, peripheral vasculopathy was isolated (R²: 0.24 as a contributing factor in the development of soft

  20. Self-shielding factors

    International Nuclear Information System (INIS)

    Kaul, D.C.

    1982-01-01

    Throughout the last two decades many efforts have been made to estimate the effect of body self-shielding on organ doses from externally incident neutrons and gamma rays. These began with the use of simple geometry phantoms and have culminated in the use of detailed anthropomorphic phantoms. In a recent effort, adjoint Monte Carlo analysis techniques have been used to determine dose and dose equivalent to the active marrow as a function of energy and angle of neutron fluence externally incident on an anthropomorphic phantom. When combined with fluences from actual nuclear devices, these dose-to-fluence factors result in marrow dose values that demonstrate great sensitivity to variations in device type, range, and body orientation. Under a state-of-the-art radiation transport analysis demonstration program for the Japanese cities, sponsored by the Defense Nuclear Agency at the request of the National Council on Radiation Protection and Measurements, the marrow dose study referred to above is being repeated to obtain spectral distributions within the marrow for externally incident neutrons and gamma rays of arbitrary energy and angle. This is intended to allow radiobiologists and epidemiologists to select and to modify numbers of merit for correlation with health effects and to permit a greater understanding of the relationship between human and laboratory subject dosimetry

  1. Factor XII Contact Activation.

    Science.gov (United States)

    Naudin, Clément; Burillo, Elena; Blankenberg, Stefan; Butler, Lynn; Renné, Thomas

    2017-11-01

    Contact activation is the surface-induced conversion of factor XII (FXII) zymogen to the serine protease FXIIa. Blood-circulating FXII binds to negatively charged surfaces and this contact to surfaces triggers a conformational change in the zymogen inducing autoactivation. Several surfaces that have the capacity for initiating FXII contact activation have been identified, including misfolded protein aggregates, collagen, nucleic acids, and platelet and microbial polyphosphate. Activated FXII initiates the proinflammatory kallikrein-kinin system and the intrinsic coagulation pathway, leading to formation of bradykinin and thrombin, respectively. FXII contact activation is well characterized in vitro and provides the mechanistic basis for the diagnostic clotting assay, activated partial thromboplastin time. However, only in the past decade has the critical role of FXII contact activation in pathological thrombosis been appreciated. While defective FXII contact activation provides thromboprotection, excess activation underlies the swelling disorder hereditary angioedema type III. This review provides an overview of the molecular basis of FXII contact activation and FXII contact activation-associated disease states. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

  2. Research organizational factors

    International Nuclear Information System (INIS)

    Coffman, F.D. Jr.

    1990-01-01

    Organizational processes at nuclear power plants should be sufficient to prevent accidents and to protect public health and safety upon the occurrence of an accident. The role of regulatory research is to confirm that agency assessments of organization processes are on a firm technical basis and provide for improvements in the NRC [Nuclear Regulatory Commission] programs. A firm technical basis is achieved by reducing uncertainties associated with methods and measures used to assess organization processes. The general objective for regulatory research is to confirm that the agency has a coherent understanding of the organizational processes that are individually necessary and are collectively sufficient for safe operations, methods are available to reliably characterize organizational processes, and measures exist to monitor changes in the key organizational processes. The first specific objective was to develop a method to translate organizational processes into PRAs. The discussion provides feedback and insights from experience with the past and the ongoing organizational factors research. That experience suggests a set of ingredients that appear proper for performing regulatory research on organizational processes. By keeping focused upon these proper ingredients, the research will contribute to the regulatory assessments of utility management through the use of improved methods and measures in investigations, inspections, diagnostics, performance indicators, and PRA insights

  3. Factores asociados con la actividad física en mujeres mexicanas en edad reproductiva

    Directory of Open Access Journals (Sweden)

    Bernardo Hernández

    2003-10-01

    Full Text Available OBJETIVO: Documentar la práctica de actividades físicas ligeras y pesadas, particularmente de deportes y ejercicios, en mujeres de 12 a 49 años en México, y evaluar su asociación con algunas características sociodemográficas. MÉTODOS: Se estudió una muestra de 2 367 mujeres de 12 a 49 años de edad residentes en México en 1999 mediante el análisis secundario de los datos de la Encuesta Nacional de Nutrición de México, 1999 (ENN-99. En esta encuesta se utilizó un esquema de muestreo polietápico, estratificado, por conglomerados que conformó una muestra final de 21 000 hogares de todo el país. Mediante un cuestionario se evaluó el tiempo dedicado a las distintas formas de actividad física y se midió la actividad en equivalentes metabólicos (MET según una escala puntual. Las variables dependientes del estudio fueron el tiempo dedicado a actividades físicas pesadas (las que exigen un gasto de energía equivalente a 5 MET/hora y el dedicado a actividades ligeras o sedentarias (tales como estar sentada en el trabajo o fuera de él, ver televisión, video, cine o teatro y dormir. Las variables independientes fueron la edad, escolaridad, paridad, región del país y área de residencia (urbana o rural, nivel socioeconómico (medido mediante un índice elaborado a partir de las condiciones de la vivienda y la posesión de enseres domésticos y estado marital. Se evaluó la asociación entre las variables independientes y la práctica de deportes y se calcularon las razones de posibilidades brutas con intervalos de confianza de 95%. Para identificar la asociación entre la práctica de deportes y las variables independientes se utilizó un modelo de regresión logística ajustado según el efecto de posibles variables de confusión. Se ajustó también mediante un factor de ponderación la probabilidad de que una mujer fuese seleccionada para la muestra, y para controlar el efecto de diseño producido por la agrupación de

  4. Fatores familiares associados à obesidade abdominal entre adolescentes Family factors associated with abdominal obesity in adolescents

    Directory of Open Access Journals (Sweden)

    Rômulo Araújo Fernandes

    2009-12-01

    Full Text Available OBJETIVOS: analisar a associação entre fatores de risco familiares e a presença de obesidade abdominal entre adolescentes. MÉTODOS: a amostra foi composta por 691 jovens de ambos os gêneros (11 a 17 anos, residentes em Presidente Prudente-SP no ano de 2007. A identificação da obesidade abdominal foi baseada no valor da circunferência de cintura, e os fatores de risco familiares (escolaridade e excesso de peso dos pais, condição socioeconômica, número de irmãos e quantidade de televisores na residência foram analisados por meio de questionários. A análise estatística utilizou o teste qui-quadrado e regressão logística (razão de chance [RC] e intervalos de confiança [IC95%]. RESULTADOS: a prevalência de obesidade abdominal foi igual a 14,8% na amostra avaliada e não foi diferente entre os gêneros (masculino: 17,7% e feminino: 12,9%; p=0,111. A obesidade abdominal associou-se com a rede privada de ensino (3,75 [1,27-11,00], sobrepeso/obesidade da mãe (3,82 [1,14-12,73] e de ambos os pais (6,21 [2,07-18,63]. CONCLUSÕES: os achados do presente estudo indicam que estudar na rede privada de ensino e o excesso de peso dos pais caracterizam importantes fatores de risco associados à presença da obesidade abdominal entre adolescentes.OBJECTIVES: to investigate the association between family risk factors and abdominal obesity in adolescents. METHODS: the sample comprised 691 young people of both sexes (aged between 11 and 17 years, residing in the municipality of Presidente Prudente, in the State of São Paulo, in 2007. Identification of abdominal obesity was based on the waist circumference and family risk factors (level of schooling and overweight in the parents, socio-economic conditions, number of siblings and number of televisions in the household. These variables were collected using questionnaires. Statistical analysis involved application of the chi-squared test and logistic regression (odds ratio [OR] and confidence

  5. Prevalence of self-medication in Brazil and associated factors.

    Science.gov (United States)

    Arrais, Paulo Sérgio Dourado; Fernandes, Maria Eneida Porto; Pizzol, Tatiane da Silva Dal; Ramos, Luiz Roberto; Mengue, Sotero Serrate; Luiza, Vera Lucia; Tavares, Noemia Urruth Leão; Farias, Mareni Rocha; Oliveira, Maria Auxiliadora; Bertoldi, Andréa Dâmaso

    2016-12-01

    To analyze the prevalence and associated factors regarding the use of medicines by self-medication in Brazil. This cross-sectional population-based study was conducted using data from the PNAUM (National Survey on Access, Use and Promotion of Rational Use of Medicines), collected between September 2013 and February 2014 by interviews at the homes of the respondents. All people who reported using any medicines not prescribed by a doctor or dentist were classified as self-medication practitioners. Crude and adjusted prevalence ratios (Poisson regression) and their respective 95% confidence intervals were calculated in order to investigate the factors associated with the use of self-medication by medicines. The independent variables were: sociodemographic characteristics, health conditions and access to and use of health services. In addition, the most commonly consumed medicines by self-medication were individually identified. The self-medication prevalence in Brazil was 16.1% (95%CI 15.0-17.5), with it being highest in the Northeast region (23.8%; 95%CI 21.6-26.2). Following the adjusted analysis, self-medication was observed to be associated with females, inhabitants from the North, Northeast and Midwest regions and individuals that have had one, or two or more chronic diseases. Analgesics and muscle relaxants were the therapeutic groups most used for self-medication, with dipyrone being the most consumed medicines. In general, most of the medicines used for self-medication were classified as non-prescriptive (65.5%). Self-medication is common practice in Brazil and mainly involves the use of non-prescription medicines; therefore, the users of such should be made aware of the possible risks. Analisar a prevalência e os fatores associados à utilização de medicamentos por automedicação no Brasil. Este estudo transversal de base populacional foi realizado com dados da Pesquisa Nacional de Acesso, Utilização e Promoção do Uso Racional de medicamentos (PNAUM

  6. Investing in systematic factor premiums

    NARCIS (Netherlands)

    Koedijk, C.G.; Slager, A.M.H.; Stork, P.A.

    2016-01-01

    In this paper we investigate and evaluate factor investing in the US and Europe for equities and bonds. We show that factor-based portfolios generally produce comparable or better portfolios than market indices. We expand the analysis to other asset classes and factors, work with other optimisation

  7. Human Factors in Marine Casualties

    Directory of Open Access Journals (Sweden)

    Jelenko Švetak

    2002-05-01

    Full Text Available Human factors play an important role in the origin of accidents,and it is commonly claimed that between seventy andninety-five percent of industrial and transport accidents involvehuman factors, see Figure 1.Some authorities, however, claim that ultimately, all accidentsinvolve human factors.

  8. Investing in systematic factor premiums

    NARCIS (Netherlands)

    Koedijk, Kees G.; Slager, Alfred M. H.; Stork, P.A.

    In this paper we investigate and evaluate factor investing in the US and Europe for equities and bonds. We show that factor-based portfolios generally produce comparable or better portfolios than market indices. We expand the analysis to other asset classes and factors, work with other optimisation

  9. Factor Analysis of Intern Effectiveness

    Science.gov (United States)

    Womack, Sid T.; Hannah, Shellie Louise; Bell, Columbus David

    2012-01-01

    Four factors in teaching intern effectiveness, as measured by a Praxis III-similar instrument, were found among observational data of teaching interns during the 2010 spring semester. Those factors were lesson planning, teacher/student reflection, fairness & safe environment, and professionalism/efficacy. This factor analysis was as much of a…

  10. Factor analysis and missing data

    NARCIS (Netherlands)

    Kamakura, WA; Wedel, M

    2000-01-01

    The authors study the estimation of factor models and the imputation of missing data and propose an approach that provides direct estimates of factor weights without the replacement of missing data with imputed values. First, the approach is useful in applications of factor analysis in the presence

  11. Factor Analysis via Components Analysis

    Science.gov (United States)

    Bentler, Peter M.; de Leeuw, Jan

    2011-01-01

    When the factor analysis model holds, component loadings are linear combinations of factor loadings, and vice versa. This interrelation permits us to define new optimization criteria and estimation methods for exploratory factor analysis. Although this article is primarily conceptual in nature, an illustrative example and a small simulation show…

  12. Robust and Sparse Factor Modelling

    DEFF Research Database (Denmark)

    Croux, Christophe; Exterkate, Peter

    nonzero factor loadings. Compared to the traditional factor construction method, we find that this procedure leads to a favorable forecasting performance in the presence of outliers and to better interpretable factors. We investigate the performance of the method in a Monte Carlo experiment...

  13. Geriatic Disability Related Factors

    Directory of Open Access Journals (Sweden)

    Mohsen Adib Hajbagheri

    2008-07-01

    Full Text Available Objectives: Reports are indicating of increasing trend of aging and disability in the developing countries while such disabilities are decreasing within the developed countries. This study designed to evaluate the disability and some of its related factors among the elderly population (65 and older in Kashan, Iran. Methods & Materials: A cross-sectional analytical study was conducted on a multi-stage random sample of 350 elderly people (65 year and older in Kashan. The WHO-DAS-II was used as the generic disability measure. The questionnair had 48 questions. The range of score could be between 0-144. Chi-square, t-test analysis and ANOVA were utilized to check significant differences between subgroups. Results: 61% were men and 12% were living lonely. One fourth had some type of addiction, the majority were ilitrate and two thired had not regular phisycal activity.Twenty percent of the old people had a modereate disability and 4.3% were extremely disabled. A significant relationship was found between the disability and variables such as sex, age, living style, needing help, marriage status, living location, addiction, job, level of physical activity, education, and having multiple diseases. Conclusion: In conclusion, geriatric population in Iran, has a lower levels of disability in compare to those of other developed countries. Need of geriatric cares must be be increasing, since the populationpattern of elderly people is increasing in Iran. Female and ilitrate elders were sufering of more disability. These findings indicated the nessesity to more attention to these voulnarable subgroups of population.

  14. Gut transfer factors

    International Nuclear Information System (INIS)

    1990-01-01

    A Nuclear Energy Agency (NEA) Expert Group has proposed values for the absorbed fractions (f 1 values) of radionuclides ingested in food and drinking water by members of the public. The f 1 values for adults, which are also taken to apply to children from 1 year of age, are increased from those given in ICRP Publication 30 for occupationally exposed adults for 7 elements out of the 31 considered. Since the publication of the NEA report, further information has become available that is relevant to the choice of f 1 values for polonium and thorium. These data suggest that for the present the f 1 value for polonium currently recommended by ICRP (0.1) should be retained, and that for thorium a reasonable f 1 value is 0.0005. With these exceptions, the NRPB endorses the revisions in f 1 values proposed by the NEA Expert Group for adults and children from 1 year of age. Higher f 1 values are proposed by the NEA expert Group for absorption in the first year of life. For adult values of between 0.01 and 0.5, an increase by a factor of two is assumed, and for adult values of 0.001 or less, absorption by infants is taken to be ten times greater. This approach is consistent with, and extends, that applied to the actinides in ICRP Publication 48 and represents a reasonable interpretation of current evidence. The NRPB therefore endorses the approach proposed by the NEA Expert Group for the calculation of doses to infants. (author)

  15. Factores de riesgo de caídas en ancianos: revisión sistemática Fatores de risco de quedas em idosos Risk factors for falls in the elderly: systematic review

    Directory of Open Access Journals (Sweden)

    Zenewton André da Silva Gama

    2008-10-01

    Full Text Available OBJETIVO: Sistematizar los hallazgos de los estudios de cohorte prospectivos sobre los múltiples factores de riesgo de caídas en ancianos y valorar la calidad metodológica de los mismos. MÉTODOS: Revisión sistemática de estudios epidemiológicos en las bases de datos Medline, SciELO y Lilacs. Fueron incluidos estudios con número de sujetos >100, con edad >64 años, de ambos sexos, residentes en la comunidad o en instituciones para ancianos. RESULTADOS: De 726 publicaciones encontradas, 15 estudios cumplieron con los criterios de inclusión, habiendo sido publicados entre 1988 y 2005. Los estudios presentaron heterogeneidad metodológica. Los principales factores asociados a un aumento del riesgo de caída son: antecedente de caída, alteración de la marcha, incapacidad funcional, deterioro cognitivo, consumo de medicación psicotrópica y exceso de actividad física. A pesar de hallazgos contradictorios, ser del sexo femenino y tener edad avanzada, también pueden ser predictores de caída. CONCLUSIONES: Se identifican algunas carencias metodológicas de los estudios de cohorte prospectivo sobre caídas: carencia de estudios sobre determinantes extrínsecos, necesidad de enmascaramiento del evaluador durante el seguimiento y de un mejor control del seguimiento con menores intervalos entres las recogidas de datos.OBJETIVO: Sistematizar os achados dos estudos de coorte prospectivos sobre os múltiplos fatores de risco de quedas em idosos e avaliar a qualidade metodológica desses estudos. MÉTODOS: Revisão sistemática de estudos nas bases de dados Medline, SciELO e Lilacs. Foram incluídos estudos com número de sujeitos >100, com idade >64 anos, de ambos os sexos, residentes na comunidade ou em instituições para idosos. RESULTADOS: Das 726 publicações encontradas, 15 estudos cumpriram os critérios de inclusão, tendo sido publicados entre 1988 e 2005. Os estudos apresentaram heterogeneidade metodológica. Os principais fatores

  16. [Recurrent diverticulitis - risk factors].

    Science.gov (United States)

    Adamová, Z; Slováček, R; Sankot, J

    2013-10-01

    Colonic diverticular disease is a common illness, especially in the elderly population. It may be asymptomatic and cause chronic intestinal problems, colonic diverticular bleeding or inflammatory complications with considerable morbidity and mortality. We have attempted at finding factors that would help us identify patients with a higher risk of diverticulitis recurrence as well as patients with a higher likelihood of perforated diverticulitis. This retrospective study included all patients admitted to our surgical ward for inflammatory complications of diverticular disease between 2000 and 2012: 278 patients, 88 men and 190 women. We looked up the first attack of diverticulitis in our documentation as well as the relapses, if any, their number and course, and the time from the first attack to the relapse. We analyzed the influence of age, gender, comorbidities (diabetes mellitus, overweight, ischemic heart disease, chronic renal failure, gastroduodenal disease), nicotine abuse and medication (glucocorticoids and other immunosuppressive drugs, acetylsalicylic acid) on diverticulitis recurrence and its complicated course. We compared the results of conservative and surgical therapy. Statistical analysis was performed using Fishers exact test and Man-Whitney U tests. We did not demonstrate any statistically significant dependence of diverticulitis recurrence on age or gender. Colectomy (both acute and elective surgery) clearly decreases the likelihood of recurrence (p=0.00007). Comorbidities, nicotine abuse and medication were not associated with an increased risk of recurrence. Steroid and immunosuppressive drugs use was significantly associated with higher perforation rates, without impacting on the likelihood of recurrence. Regular smoking of cigarettes had no impact on recurrence or on its severity. We did not find any reliable indicator of recurrent diverticulitis. Age, gender, comorbidities, smoking and medication are not significant. Immunocompromised

  17. The population factor.

    Science.gov (United States)

    Kats, G

    1983-01-01

    Reducing population growth is essentil to Egypt's broader efforts to improve facilities, services, and the phsycial quality of life. Although a family planning program has existed since the mid-1950s, the 2.7% annual rate of population growth has not changed in 30 years. Nasser and the other "free officers" who seized power in 1952 became concerned about the adverse effects of the rapidly growing population, but perhaps out of concern with a possible religious backlash, they confined themselves to launching studies and subsidizing several dozen private family planning clinics. From 1962-72, the number of private clinics grew from 28 to 480, and family planning was introduced in government healthclinics in 1965. Such clinics are mainly located in rural areas and are staffed by doctors and other personnel who are not members of the local community and are not very effective at promoting family planning. Local girls and women called Rayadet were recruited to promote the idea to birth control in local communities. By 1970, 12.6% of Egyptians were using reliable contraception. A national survey 12 years later found 34% using contraception, buth the figure seems high. Approximately 60-65% of eligible couples would need to practice birth control for Egypt to reach a less than 1% annuel increase. The Egyptian government hopes to slow population growth to 1% by the year 2000, but major problems of motivation remain especially among the rural poor. Several factors may lead to success of the family planning effort: 1) financial and technical support from international family planning sources has grown rapidley and is likely to remain high; 2) the mortality rate has dropped from 17.8/1000 in 1952 to about half that level, while the rate of natural increase is about the same, suggesting that future reductions in the birth rate will translate to a reduced rate of natural increase, and that parents will be less reluctant to practice faimly planning if there is a greater chance

  18. A factor analysis to detect factors influencing building national brand

    Directory of Open Access Journals (Sweden)

    Naser Azad

    Full Text Available Developing a national brand is one of the most important issues for development of a brand. In this study, we present factor analysis to detect the most important factors in building a national brand. The proposed study uses factor analysis to extract the most influencing factors and the sample size has been chosen from two major auto makers in Iran called Iran Khodro and Saipa. The questionnaire was designed in Likert scale and distributed among 235 experts. Cronbach alpha is calculated as 84%, which is well above the minimum desirable limit of 0.70. The implementation of factor analysis provides six factors including “cultural image of customers”, “exciting characteristics”, “competitive pricing strategies”, “perception image” and “previous perceptions”.

  19. Risk factor based investing:case: MSCI risk factor indices

    OpenAIRE

    Pieskä, J. (Jukka)

    2016-01-01

    Abstract The aim of this thesis is to study risk factor based investing and test how well MSCI constructs their risk factor based indices. Risk factor based investing has gained a lot of media exposure in the recent years and “Smart Beta” products are becoming more popular. Blackrock estimated that there are more than 700 exchange traded products available and they have over $ 529 billion in assets under management. Risk fa...

  20. Identificação de fatores de risco de desnutrição em pacientes internados Identification of malnutrition risk factors in hospitalized patients

    Directory of Open Access Journals (Sweden)

    Rita de Cássia de Aquino

    2011-12-01

    Full Text Available OBJETIVO: Identificar fatores associados ao risco de desnutrição em pacientes internados. MÉTODOS: Estudo transversal, realizado em um hospital geral de São Paulo, em uma amostra de conveniência de 300 pacientes adultos, com idade entre 18 e 64 anos. Foi aplicado um questionário estruturado, constituído por informações antropométricas, clínicas e dietéticas, e os pacientes foram classificados e dicotomizados em desnutridos e não desnutridos. Para a identificação dos fatores associados à desnutrição foi conduzida uma regressão logística múltipla e foram selecionadas as variáveis preditivas. As variáveis foram organizadas segundo o valor de oddsratio (OR, intervalo de confiança (IC 95%, coeficiente de regressão (β e nível descritivo do teste (p. RESULTADOS: A desnutrição ocorreu em 60,7% da amostra, e as variáveis encontradas associadas à desnutrição foram a presença de: perda de peso recente e involuntária, ossatura aparente, redução de apetite, diarreia, ingestão energética inadequada e gênero masculino. CONCLUSÃO: Os fatores associados à desnutrição podem ser levantados no momento da internação e conduzirem a uma avaliação que permita uma adequada terapia de intervenção e recuperação nutricional.OBJECTIVE: To identify factors associated with the risk of malnutrition in hospitalized patients. METHODS: Cross-sectional study, performed in a general hospital located in São Paulo, in a convenience sample of 300 adult individuals, aged 18 to 64 years. A structured questionnaire was applied consisting of anthropometric, clinical and dietary data, and the patients were evaluated and dichotomized into malnourished and non-malnourished. A multiple logistic regression was performed to identify the factors associated with malnutrition. The variables were organized according to the values of odds ratio (OR, confidence interval (95% CI, regression coefficient (β and descriptive level of significance (p

  1. Risk factors on the treatment of cecum injuries with primary suture in rats

    OpenAIRE

    Fraga, Gustavo Pereira; Mantovani, Mario; Morandin, Rosana Celestina; Gomes, Cristiane Pereira; Magna, Luís Alberto; Avelar, Wagner Mauad; Freire, Lucas Marcelo Dias

    2004-01-01

    Objetivo: O presente trabalho teve como objetivo avaliar os resultados da sutura primária no tratamento das lesões traumáticas de ceco em ratos, após exposição a intervalos de tempo crescentes entre o trauma e a cirurgia, e com diferentes graus de peritonite. Métodos: Em estudo randomizado, duplo-cego, 96 ratos Wistar, machos, com peso variando de 200 a 250 gramas, foram submetidos a laparotomia, em que se realizava lesão de 5 milímetros de diâmetro na borda contramesentérica do ceco. Em 12 a...

  2. Sociodemographic and health factors associated with mortality in community-dwelling elderly.

    Science.gov (United States)

    Borim, Flávia Silva Arbex; Francisco, Priscila Maria Stolses Bergamo; Neri, Anita Liberalesso

    2017-05-04

    The objective of this study is to identify factors associated with mortality, with emphasis on gender and age differences. This is a cross-sectional study, which uses data from the FIBRA-2008-2009 network in Campinas, State of São Paulo, Brazil, with information on non-institutionalized residents of the urban area and the Mortality Information System. The dependent variable has been death, in 2013. The associations have been tested by odds ratio (OR) and their 95% confidence intervals, and the analyses have been conducted using the program Stata 12.0. Average age has been 72.3 years, 69.3% have been women, and 8.9% have died. We have found greater OR for mortality in individuals aged ≥ 75 years, classified as pre-frail or frail, and in those who have reported heart disease. In this study, the analysis of specific subgroups has allowed us to better understand the relationship between the factors associated with death in the elderly. With the exception of age, strategies based on primary and secondary care, focused on priority groups, can have a positive impact on the reduction of mortality among the elderly. Identificar fatores associados à mortalidade, com ênfase nas diferenças de gênero e idade. Trata-se de estudo transversal, utilizando dados provenientes da rede FIBRA-2008-2009 em Campinas, SP, com informações de pessoas não institucionalizadas residentes na área urbana e pelo Sistema de Informações de Mortalidade. A variável dependente foi a ocorrência de óbito, verificada em 2013. As associações foram testadas pelas razões de chances (OR) e respectivos intervalos de confiança de 95%, e as análises conduzidas no programa Stata 12.0. A média de idade foi 72,3 anos, 69,3% eram mulheres e 8,9% foram a óbito. Encontrou-se maior OR para mortalidade nos indivíduos com idade ≥ 75 anos, nos classificados como pré-frágil ou frágil e naqueles que referiram doença do coração. Neste estudo, a análise para os subgrupos específicos permitiu

  3. Harmony of super form factors

    Science.gov (United States)

    Brandhuber, A.; Gürdoğan, Ö.; Mooney, R.; Travaglini, G.; Yang, G.

    2011-10-01

    In this paper we continue our systematic study of form factors of half-BPS operators in mathcal{N} = 4 super Yang-Mills. In particular, we extend various on-shell techniques known for amplitudes to the case of form factors, including MHV rules, recursion relations, unitarity and dual MHV rules. As an application, we present the solution of the recursion relation for split-helicity form factors. We then consider form factors of the stress-tensor multiplet operator and of its chiral truncation, and write down supersymmetric Ward identities using chiral as well as non-chiral superspace formalisms. This allows us to obtain compact formulae for families of form factors, such as the maximally non-MHV case. Finally we generalise dual MHV rules in dual momentum space to form factors.

  4. Cobertura e fatores associados à não realização do exame preventivo de Papanicolaou em São Luís, Maranhão Coverage and factors associated with not performing Pap smear screening tests in São Luís, Maranhão, Brazil

    Directory of Open Access Journals (Sweden)

    Márcia Maria Hiluy Nicolau de Oliveira

    2006-09-01

    Full Text Available Com o objetivo de estimar a cobertura, a periodicidade, e identificar fatores associados à não realização do exame preventivo de Papanicolau, 465 mulheres de 25 a 49 anos residentes no município de São Luís foram entrevistadas em 1998. Foi realizado inquérito domiciliar pelo método de amostragem por conglomerados em três estágios. Na análise estatística foram calculados intervalos de confiança de 95% corrigidos pelo desenho do estudo, e os "odds ratio" brutos e ajustados por regressão logística. A cobertura do Papanicolaou pelo menos uma vez na vida foi de 82,4% (Intervalo de Confiança 95%, 76,6 - 87,0%, praticamente atingindo a cobertura mínima necessária de 85% para causar impacto epidemiológico na incidência e mortalidade por câncer cérvico-uterino. O intervalo entre a realização dos exames foi curto, pois 65,8% das mulheres repetiram o exame com até um ano. Após o ajuste para fatores de confundimento foram associados à não realização do Papanicolaou: não ter companheiro, ter cinco a oito anos de escolaridade, não ter realizado consulta médica nos três últimos meses e morar em domicílio cujo chefe de família tem ocupação manual não especializada. Ter tido de dois a quatro parceiros sexuais nos três últimos meses foi associado a menor risco de não realização do preventivo. Em capital do Nordeste, a cobertura do exame preventivo de Papanicolaou foi semelhante à relatada em outros estudos nacionais. Entretanto, algumas mulheres realizaram citologias desnecessárias a intervalos curtos, implicando em desperdício de recursos e dificultando o acesso aos grupos mais vulneráveis que apresentaram maiores riscos de não testagem.In 1998, 465 women from 25 to 49 years of age, inhabitants of the municipality of São Luís, Maranhão, Brazil were interviewed to estimate Pap smear coverage, interval between tests and to identify factors associated with not performing Pap smears. A three-stage household

  5. Investing in Systematic Factor Premiums

    OpenAIRE

    Koedijk, Kees; Slager, Alfred; Stork, Philip

    2015-01-01

    In this paper we investigate and evaluate factor investing in the United States and Europe for equities and bonds. We show that factor-based portfolios generally produce comparable or better portfolios than market indices. We expand the analysis to other asset classes and factors, work with other optimization methods and add a basic liability structure. The results remain robust when we add real estate and commodities to equities and bonds. Also, the results are not dependent to the removal o...

  6. Risk factors in school shootings.

    Science.gov (United States)

    Verlinden, S; Hersen, M; Thomas, J

    2000-01-01

    Nine incidents of multiple-victim homicide in American secondary schools are examined and common risk factors are identified. The literature dealing with individual, family, social, societal, and situational risk factors for youth violence and aggression is reviewed along with existing risk assessment methods. Checklists of risk factors for serious youth violence and school violence are used in reviewing each school shooting case. Commonalties among the cases and implications for psychologists practicing in clinical and school settings are discussed.

  7. Factor structure, internal consistency and reliability of the Posttraumatic Stress Disorder Checklist (PCL: an exploratory study Estrutura fatorial, consistência interna e confiabilidade do Posttraumatic Stress Disorder Checklist (PCL: um estudo exploratório

    Directory of Open Access Journals (Sweden)

    Eduardo de Paula Lima

    2012-01-01

    Full Text Available INTRODUCTION: Posttraumatic stress disorder (PTSD is an anxiety disorder resulting from exposure to traumatic events. The Posttraumatic Stress Disorder Checklist (PCL is a self-report measure largely used to evaluate the presence of PTSD. OBJECTIVE: To investigate the internal consistency, temporal reliability and factor validity of the Portuguese language version of the PCL used in Brazil. METHODS: A total of 186 participants were recruited. The sample was heterogeneous with regard to occupation, sociodemographic data, mental health history, and exposure to traumatic events. Subjects answered the PCL at two occasions within a 15 days’ interval (range: 5-15 days. RESULTS: Cronbach’s alpha coefficients indicated high internal consistency for the total scale (0.91 and for the theoretical dimensions of the Diagnostic and Statistical Manual of Mental Disorders, 4th edition (DSM-IV (0.83, 0.81, and 0.80. Temporal reliability (test-retest was high and consistent for different cutoffs. Maximum likelihood exploratory factor analysis (EFA was conducted and oblique rotation (Promax was applied. The Kaiser-Meyer-Olkin (KMO index (0.911 and Bartlett’s test of sphericity (χ² = 1,381.34, p INTRODUÇÃO: O transtorno do estresse pós-traumático (TEPT é um transtorno de ansiedade decorrente da exposição a eventos traumáticos. Entre as medidas de avaliação dos sintomas, destaca-se o Posttraumatic Stress Disorder Checklist (PCL. OBJETIVO: Investigar a consistência interna, a confiabilidade temporal e a validade fatorial da versão do PCL em português, utilizada no Brasil. MÉTODOS: Participaram do estudo 186 indivíduos heterogêneos em relação a ocupação, características sociodemográficas, histórico de saúde mental e exposição a eventos traumáticos. O PCL foi aplicado em dois momentos considerando um intervalo máximo de 15 dias (intervalo: 5-15 dias. RESULTADOS: A consistência interna (alfa de Cronbach foi adequada para a escala

  8. Social networks and factor markets

    DEFF Research Database (Denmark)

    Abay, Kibrom Araya; Kahsay, Goytom Abraha; Berhane, Guush

    In the absence of well-established factor markets, the role of indigenous institutions and social networks can be substantial for mobilizing factors for agricultural production. We investigate the role of an indigenous social network in Ethiopia, the iddir, in facilitating factor market...... transactions among smallholder farmers. Using detailed longitudinal household survey data and employing a difference-in-differences approach, we find that iddir membership improves households’ access to factor markets. Specifically, we find that joining an iddir network improves households’ access to land...... sources. These results point out the roles non-market arrangements, such as social networks, can play in mitigating market inefficiencies in poor rural markets....

  9. Strange nucleon form-factors

    Science.gov (United States)

    Maas, F. E.; Paschke, K. D.

    2017-07-01

    A broad program measuring parity-violation in electron-nuclear scattering has now provided a large set of precision data on the weak-neutral-current form-factors of the proton. Under comparison with well-measured electromagnetic nucleon form-factors, these measurements reveal the role of the strange quark sea on the low-energy interactions of the proton through the strange-quark-flavor vector form-factors. This review will describe the experimental program and the implications of the global data for the strange-quark vector form-factors. We present here a new fit to the world data.

  10. Factorization method of quadratic template

    Science.gov (United States)

    Kotyrba, Martin

    2017-07-01

    Multiplication of two numbers is a one-way function in mathematics. Any attempt to distribute the outcome to its roots is called factorization. There are many methods such as Fermat's factorization, Dixońs method or quadratic sieve and GNFS, which use sophisticated techniques fast factorization. All the above methods use the same basic formula differing only in its use. This article discusses a newly designed factorization method. Effective implementation of this method in programs is not important, it only represents and clearly defines its properties.

  11. Gene regulation by growth factors

    International Nuclear Information System (INIS)

    Metz, R.; Gorham, J.; Siegfried, Z.; Leonard, D.; Gizang-Ginsberg, E.; Thompson, M.A.; Lawe, D.; Kouzarides, T.; Vosatka, R.; MacGregor, D.; Jamal, S.; Greenberg, M.E.; Ziff, E.B.

    1988-01-01

    To coordinate the proliferation and differentiation of diverse cell types, cells of higher eukaryotes communicate through the release of growth factors. These peptides interact with specific transmembrane receptors of other cells and thereby generate intracellular messengers. The many changes in cellular physiology and activity that can be induced by growth factors imply that growth factor-induced signals can reach the nucleus and control gene activity. Moreover, current evidence also suggests that unregulated signaling along such pathways can induce aberrant proliferation and the formation of tumors. This paper reviews investigations of growth factor regulation of gene expression conducted by the authors' laboratory

  12. Summable series and convergence factors

    CERN Document Server

    Moore, Charles N

    1938-01-01

    Fairly early in the development of the theory of summability of divergent series, the concept of convergence factors was recognized as of fundamental importance in the subject. One of the pioneers in this field was C. N. Moore, the author of the book under review.... Moore classifies convergence factors into two types. In type I he places the factors which have only the property that they preserve convergence for a convergent series or produce convergence for a summable series. In type II he places the factors which not only maintain or produce convergence but have the additional property that

  13. First course in factor analysis

    CERN Document Server

    Comrey, Andrew L

    2013-01-01

    The goal of this book is to foster a basic understanding of factor analytic techniques so that readers can use them in their own research and critically evaluate their use by other researchers. Both the underlying theory and correct application are emphasized. The theory is presented through the mathematical basis of the most common factor analytic models and several methods used in factor analysis. On the application side, considerable attention is given to the extraction problem, the rotation problem, and the interpretation of factor analytic results. Hence, readers are given a background of

  14. FACTORING- CREDIT OPPORTUNITIES IN ROMANIA

    Directory of Open Access Journals (Sweden)

    ADELA IONESCU

    2013-05-01

    Full Text Available Capital is the main factor of production, business development becomes virtually impossible without taking into account the financial market and the resources it provides to businesses. Any business, regardless of its degree of development, is involving direct contact with financial markets, namely the institutions that mediate mobilization of capital and the services they provide. Understanding the functioning of the financial system, the specific financial mechanisms through which savings are allocated to support capital investments and the costs and risks involved is essential for the development of a solid base for business. In this context, factoring operations can support economic agents, allowing a transfer of commercial receivables from their holder to a factor who commits to their recovery and guarantee such operations even if temporary or permanent insolvency of the debtor . Thus, factoring is a complex technique in at least two aspects, of the debt and the transfer of credit. . Factoring is a means of financing business, especially export-import transactions, less known in Romania. Maybe because of poor business environment popularize the term is as little known as it was a few years ago the leasing. Present in Romanian legislation since 2002, factoring appears as a contract between one party (called adherent, providing goods or service and a banking company or a financial institution specialized (called factor, which the last one shall finance debts pursuing and preservation against credit risks and adherent gives factor by way of sale, debts arising from the sale of goods or services to third parties. The article is divided into three parts. In the first part we defined the concept of factoring and international factoring, then I presented the advantages and development of factoring in Romania, and the last part conclusions.

  15. Paleomorphology of the upper part of the Macae formation, Namorado field, Campos basin; Paleomorfologia do intervalo superior da formacao Macae, Campo de Namorado, Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Barboza, Eduardo Guimaraes [Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS (Brazil). Inst. de Geociencias. Programa de Pos-Graduacao em Geociencias; Tomazelli, Luiz Jose; Ayup-Zouain, Ricardo Norberto [Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS (Brazil). Inst. de Geociencias. Centro de Estudos de Geologia Costeira e Oceanica; Viana, Adriano Roessler [PETROBRAS, Rio de Janeiro, RJ (Brazil). Exploracao e Producao. Edificio Sede

    2004-07-01

    The Macae Formation (Late Albian-Turonian of the Campos Basin) is represented by a thick column of carbonate sediments whose deposition began soon after the evaporitic phase that marks the beginning of the marine occupation of the basin. The top of this interval is represented by an unconformity (Type I), indicative of a variation in the base level of the basin, on which the turbidities of the basal sequence of the Namorado Field were deposited. For a better understanding of the depositional geometry of these turbidities, the paleogeomorphology analysis demonstrated to be quite efficient. The method of work used for so was a combination among the seismic 3D visualization (VoxelGeo{sup R}), from the characterization of different physical attributes of the seismic signal, and the facies analysis of wells profiles of the referred field. The developed analysis allowed the individualization and the three-dimensional visualization of a sinuous paleochannel in the top of the interval, until then not described in previous interpretations of this depositional system. With the information coming from this study, a better understanding of the genesis of this accumulation can be reached, especially in the part regarding to the units of important economic character, represented by the turbidities deposits and whose occurrences are related with stages of relative lowering of the sea level. (author)

  16. O PAPEL DE DUAS SESSÕES EXTENUANTES COM DIFERENTES INTERVALOS ENTRE AS SESSÕES – 24 e 48 HORAS – E O EFEITO PROTETOR DA CARGA

    Directory of Open Access Journals (Sweden)

    Rodrigo Bergome Muniz

    2014-02-01

    Full Text Available It is reported that a single session of resistance exercise provides to our bodies with an adaptation of shape subsequent exercises do not have the same effect stressful. Objective: To evaluate the repeated bout effect in exercise sessions with different intervals after a week of the first session. Materials and Methods: 14 men (18 to 30 years engaged in strength training for a minimum of 6 months were divided into two groups A and B. The participants performed five sets, maximum repetitions with two minutes of rest between sets at 85% 1RM in biceps curl exercise unilateral Scott on the bench with the non-dominant arm. The second training session was performed 24 h later, for group A, and 48 hours later for group B. Blood samples were collected in pre measures, 24h, 48h, 72h and 96h, arm girth measurements, range of motion in flexion and extension, and measures of subjective perception of pain on palpation and by extension, before and after exercise every day of the tests. Results: When the first two exercise sessions were performed with shorter rest intervals (24 hours due to increased pain sensation, maintaining range of motion and reduced activity for longer serum CK higher. Conclusion: Exercises with short intervals (24 hours may modulate the repeated bout effect increasing the values of physiological variables and significant reductions in joint range of motion.

  17. Tamaño del efecto y su intervalo de confianza y meta-análisis en Psicología

    OpenAIRE

    Badenes Ribera, Laura

    2016-01-01

    La Práctica Basada en la Evidencia (PBE) se define como “la integración de la mejor evidencia disponible con la experiencia clínica en el contexto de las características, cultura y preferencias del paciente” (American Psychological Association (APA), Presidencial Grupo de Trabajo sobre la Práctica Basada en la Evidencia, 2006, p. 273). Por definición, la PBE se basa en la utilización de la investigación científica en la toma de decisiones en un esfuerzo por producir los mejores servicios pos...

  18. Memoria de trabajo en niños escolarizados: efecto de intervalos de presentación y distractores en la prueba computarizada Memonum

    Directory of Open Access Journals (Sweden)

    Carlos Arturo Conde Cotes

    2013-06-01

    Full Text Available La presente investigación evaluó la memoria de trabajo visual a través de la prueba computarizada Memonum en niños escolarizados. Se evaluaron los efectos de tres tiempos de exposición (1, 4 y 8 segundos y de la presentación de un distractor sobre el desempeño mnemónico en la prueba Memonum en 72 niños pertenecientes a un colegio del área metropolitana de Bucaramanga, Colombia, con edades entre 8 y 11 años de los grados tercero, cuarto y quinto de primaria. Se encontró una diferencia significativa entre los tiempos de exposición en las variables número de aciertos y aciertos acumulados, demostrandoun mejor desempeño mnemónico en los participantes que presentaron la prueba en el tiempo de 8 segundos en comparación con los niños pertenecientes al grupo de 1 segundo; además, la presencia del distractor demostró una diferencia significativa en los aciertos y aciertos acumulados, considerándose como un estímulo generador de interferencia que perturba la capacidad de almacenamiento de la memoria de trabajo en niños. Adicionalmente, se halló una diferencia significativa en cuanto al uso de la estrategia de repetición mental, indicando que los participantes de los grupos de 4 y 8 segundos leasignaron mayor puntaje que los niños del grupo de 1 segundo. Un amplio tiempo de exposición de estímulos en la prueba Memonum aumenta la capacidad de retención; asimismo, el empleo de un distractor afecta en los participantes la capacidad de almacenamiento y esta, a suvez, aumenta de acuerdo a la progresión escolar, debidoal uso de las estrategias mnemónicas que los niños utilizan para garantizar el recuerdo de las series numéricas.

  19. Pineal factors other than melatonin

    NARCIS (Netherlands)

    Ebels, I.

    Some sheep pineal factors other than melatonin are described. A “nonmelatonin” antigonadotropic activity has been detected by application of the inhibition of compensatory ovarian hypertrophy (COH) in unilaterally ovariectomized adult Charles River CD-1 mice. The factor has been extracted from

  20. Kadison-Kastler stable factors

    DEFF Research Database (Denmark)

    Cameron, Jan; Christensen, Erik; Sinclair, Allan M.

    2014-01-01

    It is proven that a pair of continuous finite von Neumann algebra factors are unitarily equivalent if sufficiently close and one satisfies a certain cohomological condition.......It is proven that a pair of continuous finite von Neumann algebra factors are unitarily equivalent if sufficiently close and one satisfies a certain cohomological condition....

  1. Quadratic prediction of factor scores

    NARCIS (Netherlands)

    Wansbeek, T

    1999-01-01

    Factor scores are naturally predicted by means of their conditional expectation given the indicators y. Under normality this expectation is linear in y but in general it is an unknown function of y. II is discussed that under nonnormality factor scores can be more precisely predicted by a quadratic

  2. Prevalence and obstetric risk factors

    African Journals Online (AJOL)

    suggest that obstetric factors increase the risk of damage to the anal sphincter and subsequent development of AI.[4-6] These ... variations may impact on obstetric risk factors and AI prevalence. We therefore performed a study in our population, which .... Regulatory approvals. Institutional and hospital ethical approval were ...

  3. Factors That Shape Design Thinking

    Science.gov (United States)

    Gray, Colin M.

    2013-01-01

    A wide range of design literature discusses the role of the studio and its related pedagogy in the development of design thinking. Scholars in a variety of design disciplines pose a number of factors that potentially affect this development process, but a full understanding of these factors as experienced from a critical pedagogy or student…

  4. Factor analysis of multivariate data

    Digital Repository Service at National Institute of Oceanography (India)

    Fernandes, A.A.; Mahadevan, R

    A brief introduction to factor analysis is presented. A FORTRAN program, which can perform the Q-mode and R-mode factor analysis and the singular value decomposition of a given data matrix is presented in Appendix B. This computer program, uses...

  5. Human factors influencing decision making

    OpenAIRE

    Jacobs, Patricia A.

    1998-01-01

    This report supplies references and comments on literature that identifies human factors influencing decision making, particularly military decision making. The literature has been classified as follows (the classes are not mutually exclusive): features of human information processing; decision making models which are not mathematical models but rather are descriptive; non- personality factors influencing decision making; national characteristics influencing decision makin...

  6. The nucleon's strange form factors

    International Nuclear Information System (INIS)

    Pitt, Mark L.

    2000-01-01

    Knowledge of the nucleon's strange form factors will provide valuable insight into low energy hadron structure. Measurement of the vector strange form factor of the nucleon is accomplished through parity-violating electron scattering. This paper reviews the current status of this class of experiments

  7. Factors of trade in Europe

    Czech Academy of Sciences Publication Activity Database

    Hanousek, Jan; Kočenda, Evžen

    2014-01-01

    Roč. 38, č. 4 (2014), s. 518-535 ISSN 0939-3625 R&D Projects: GA ČR(CZ) GAP403/12/0080 Grant - others:UK(CZ) UNCE 204005/2012 Institutional support: PRVOUK-P23 Keywords : bilateral trade * factors of trade * panel data Subject RIV: AH - Economics Impact factor: 0.649, year: 2014

  8. Twisting formula of epsilon factors

    Indian Academy of Sciences (India)

    For characters of a non-Archimedean local field we have explicit formula for epsilon factors. But in general, we do not have any generalized twisting formula of epsilon factors. In this paper, we give a generalized twisting formula of epsilon factorsvia local Jacobi sums.

  9. Mitotic bookmarking by transcription factors.

    Science.gov (United States)

    Kadauke, Stephan; Blobel, Gerd A

    2013-04-02

    Mitosis is accompanied by dramatic changes in chromatin organization and nuclear architecture. Transcription halts globally and most sequence-specific transcription factors and co-factors are ejected from mitotic chromatin. How then does the cell maintain its transcriptional identity throughout the cell division cycle? It has become clear that not all traces of active transcription and gene repression are erased within mitotic chromatin. Many histone modifications are stable or only partially diminished throughout mitosis. In addition, some sequence-specific DNA binding factors have emerged that remain bound to select sites within mitotic chromatin, raising the possibility that they function to transmit regulatory information through the transcriptionally silent mitotic phase, a concept that has been termed "mitotic bookmarking." Here we review recent approaches to studying potential bookmarking factors with regards to their mitotic partitioning, and summarize emerging ideas concerning the in vivo functions of mitotically bound nuclear factors.

  10. Factores ambientales y genéticos asociados a la esquizofrenia paranoide en el área de salud "28 de septiembre"

    Directory of Open Access Journals (Sweden)

    Antonio César Núñez Copo

    Full Text Available Introducción: la esquizofrenia es una enfermedad con una marcada expresividad variable, que sugiere la existencia de factores etiológicos y procesos fisiopatológicos heterogéneos y donde se considera cada vez más la hipótesis de la interacción gen-ambiente como su principal modo de transmisión. Objetivo: determinar los posibles factores ambientales y genéticos asociados con en el debut de la esquizofrenia. Método: se realizó un estudio analítico observacional de casos y controles en el área de salud "28 de Septiembre" del municipio Santiago de Cuba, durante el cuatrimestre enero-abril de 2011, que incluyó 40 casos con diagnóstico de esquizofrenia paranoide seleccionados mediante muestreo aleatorio estratificado por sexo y a 80 controles sin este diagnóstico. Se aplicó la prueba de chi cuadrado, se calculó la oportunidad relativa (odds ratio y el intervalo de confianza. Resultados: el estado civil soltero resultó significativo al debut y en tres cuartas partes de los casos se constató algún acontecimiento estresante al inicio de la misma. Hubo asociación de los antecedentes familiares de la afección en los casos; se registró un mayor número de familiares de primer grado afectados en ambos grupos, más significativo en el grupo de los casos, lo que explica la agregación familiar de la afección más frecuentemente en las personas que padecen la enfermedad. Conclusiones: existió asociación de los antecedentes familiares de la enfermedad en los pacientes con esquizofrenia paranoide; hubo mayor porcentaje de personas afectadas en familiares de primer grado en ambos grupos; se observó agregación familiar de la enfermedad; los antecedentes prenatales aumentaron el riesgo de la enfermedad y los patrones premórbidos desde la niñez resultaron altamente significativos.

  11. Factores asociados a síndrome de aspiracion meconial en el hospital José Cayetano Heredia. Piura-Perú

    Directory of Open Access Journals (Sweden)

    Nelson David Purizaca Rosillo

    2012-09-01

    Full Text Available Objetivo: Determinar los principales factores de riesgo en recién nacidos asociados a la presencia de síndrome de aspiración meconial (SAM. Métodos: Estudio de casos y controles realizado en el Hospital José Cayetano Heredia EsSALUD – Piura. La población estuvo conformada por el registro de las historias clínicas de los años 2009-2011. Se definió como caso a los recién nacidos con diagnóstico de SAM y como controles a los 3 recién nacidos siguientes inmediatos al caso que hayan presentado líquido amniótico meconial en el parto. Las variables consideradas fueron las características del líquido meconial, datos del recién nacido (género, peso al nacer, edad gestacional, apgar al minuto y frecuencia cardiaca, datos del parto(tipo de parto, presencia de patología obstétrica y datos de la madre(edad, paridad y grado de instrucción. Se utilizó el OR con un intervalo de confianza del 95% para la medición de riesgo, se aplicó la prueba de chi cuadrado. Para el análisis estadístico se utilizó el software SPSS 18.0. Resultados: Las variables con significancia estadística asociados a SAM fueron: presencia de líquido amniótico meconial espeso (OR=12, IC95% 3.91 - 36.83, Apgar  7 (OR=22.48, IC95% 6.62 - 76.31 y número de partos > 4 (OR=6.18, IC95% 1.34-28.48. Conclusión: Los factores de riesgo asociados a la presencia de SAM fueron: líquido meconial espeso, Apgar 4. Se recomienda un mayor registro de todos los datos no sólo del recién nacido, sino también del parto y la madre.

  12. Publicación y factores asociados en docentes universitarios de investigación científica de escuelas de medicina del Perú

    Directory of Open Access Journals (Sweden)

    Reneé Pereyra-Elías

    Full Text Available Objetivos. Evaluar la frecuencia de publicación y sus factores asociados en docentes universitarios de investigación científica de escuelas de Medicina del Perú. Materiales y métodos. Estudio de corte transversal analítico. Se incluyó a todos los docentes universitarios de los cursos de investigación de las 32 escuelas de medicina del Perú en el año 2011. La búsqueda de publicaciones se realizó mediante Google Scholar, SCOPUS y Medline. Se calculó las razones de prevalencias crudas y ajustadas (RPa con intervalos de confianza al 95% mediante regresión de Poisson simple y múltiple con varianza robusta. Resultados. De los 201 docentes universitarios, 43,8% nunca ha publicado un artículo en una revista, 26,9% publicó un artículo original en una revista indizada en Medline y 16,4% lo hizo en los últimos dos años. Solo 3,0% han sido autores corresponsales en alguna revista indizada no peruana. Los factores asociados con haber publicado un artículo original en Medline durante los dos últimos años es ser menor de 40 años de edad (RPa: 2,97; IC 95%:1,21-7,32, ser profesor en una universidad donde se requiere tesis obligatoria para graduarse (RPa: 8,84; IC 95%: 2,60-30,12 y trabajar para una universidad altamente productiva (RPa: 3,24; IC 95%: 1,03-10,20. Conclusiones. La frecuencia de publicación de los docentes en investigación de las escuelas de medicina del Perú es baja. Los docentes universitarios jóvenes y los que trabajan para universidades científicamente productivas presentaron más probabilidades de publicar en una revista indizada en Medline

  13. Physiological enhancement of factors in factor analysis of dynamic studies

    International Nuclear Information System (INIS)

    Samal, M.; Surova, H.; Marikova, E.; Michalova, K.; Karny, M.; Dienstbier, Z.

    1986-01-01

    Factor analysis of dynamic radionuclide studies provides their decomposition into the images and time-activity curves corresponding to the underlying dynamic structures. The method is based on the analysis of study variance and on the subsequent differential imaging of its principal components into a simplified factor space. By changing the amount and the composition of the variance processed in the analysis it is possible to enhance the factors that are important for diagnosis while the less important factors can be suppressed. In our report, a short theoretical review of the problem is given and illustrated by the analysis of dynamic cholescintigraphy. It is shown that a suitable choice of region and/or the temporal interval of interest enables the differential evaluation of such intrahepatic compartments, which could not be observed without enhancement. (orig.)

  14. Factores de riesgo de síntomas de rinitis alérgica en adolescentes de Castellón, España Risk factors for symptoms of allergic rhinitis in adolescents in Castellón, Spain

    Directory of Open Access Journals (Sweden)

    María Rosario Pac-Sa

    2008-05-01

    Full Text Available OBJETIVOS: Estimar factores de riesgo de síntomas de rinitis alérgica en adolescentes de Castellón, España. MÉTODOS: Estudio transversal de base poblacional a partir de la fase III del ISAAC (International Study of Asthma and Allergies in Childhood llevado a cabo en 2002 entre adolescentes de 13 a 14 años. Se utilizó el cuestionario ISAAC para definir los casos de rinitis alérgica. Se estimaron razones de posibilidades (RP y sus intervalos de confianza de 95% (IC95% mediante modelos de regresión logística. RESULTADOS: La participación fue de 66,8% (3 995 adolescentes de un total de 5 981. La prevalencia de síntomas de rinoconjuntivitis en los últimos 12 meses fue de 16,5%, y la prevalencia de alergia nasal alguna vez, de 7,4%. Con la regresión logística, la rinoconjuntivitis se asoció a la mujer (RP=1,63; IC95%:1,33-2,00; fumar la madre en casa (RP=1,32; IC95%:1,08-1,63; historia de sinusitis (RP=2,02; IC95%:1,51-2,70, y circulación constante de camiones por la calle de residencia (RP=1,58; IC95%:1,02-2,44. De igual manera, la alergia nasal se asoció con la historia familiar de rinitis alérgica (RP=2,62; IC95%:1,90-3,63; historia de sinusitis (RP=2,65; IC95%:1,77-3,96, historia de bronquitis (RP=1,68; IC95%:1,19-2,36, y clase social, con descensos progresivos al comparar las clases superiores e inferiores. CONCLUSIONES: Diferentes factores de riesgo medioambientales se asociaron con el hecho de sufrir síntomas de alergia nasal; se sugiere la importancia de adecuar medidas preventivas específicas.OBJECTIVES: To estimate the risk factor for symptoms of allergic rhinitis in adolescents in Castellón, Spain. METHODS: A cross-sectional population based study of Phase III of the International Study of Asthma and Allergies in Childhood (ISAAC conducted in 2002 among adolescents from 13-14 years of age. The ISAAC questionnaire was used to define cases of allergic rhinitis. Logistic regression models were used to estimate odds ratio

  15. Reacções cutâneas adversas aos inibidores do receptor do factor de crescimento epidérmico: estudo de 14 doentes Adverse cutaneous reactions to epidermal growth factor receptor inhibitors: a study of 14 patients

    Directory of Open Access Journals (Sweden)

    Felicidade Santiago

    2011-06-01

    Full Text Available FUNDAMENTOS: O cetuximab e o erlotinib, inibidores do receptor do factor de crescimento epidérmico, provocam frequentemente reacções cutâneas adversas peculiares. OBJETIVOS: Caracterizar do ponto de vista clínico-evolutivo as reacções cutâneas adversas e avaliar a sua abordagem terapêutica. METODOLOGIA: Entre março/2005 e setembro/2009 foram seguidos 14 doentes com idade média de 59,6 anos, em tratamento com cetuximab (7 ou erlotinib (7, por neoplasia pulmonar (10 ou colorrectal (4. Retrospectivamente foi avaliado o padrão clínico evolutivo de reacção cutânea, o intervalo entre a introdução do fármaco e o início dos sintomas e a resposta ao tratamento. RESULTADOS: Doze doentes apresentaram erupção papulopustulosa predominantemente na face, decote e dorso, em média 13,5 dias após o início do fármaco. Efectuaram tratamento oral com minociclina ou doxiciclina e tópico com metronidazol, peróxido de benzoílo e/ou corticoide. Ocorreu melhoria das lesões em todos os doentes. Cinco doentes, em média oito semanas após o início da terapia, apresentaram granulomas piogénicos periungueais, em quatro casos associados a paroníquia, melhorados com tratamento tópico (antibióticos, corticoides e antissépticos. Observou-se xerose em alguns doentes e, de forma isolada, outros efeitos adversos, como telangiectasias e angiomas, alterações dos cabelos e cílios e nevos melanocíticos eruptivos. Na maioria dos doentes, a terapêutica com o inibidor do receptor do factor de crescimento epidérmico foi mantida. CONCLUSÃO: Com o crescente uso destas terapêuticas-alvo, torna-se obrigatório reconhecer e tratar os seus efeitos cutâneos adversos, assegurando uma intervenção atempada de forma a permitir a manutenção desta terapêuticaBACKGROUND: Cetuximab and erlotinib, epidermal growth factor receptor inhibitors, often cause peculiar adverse cutaneous reactions. OBJECTIVES: Our aim was to evaluate adverse cutaneous reactions

  16. Reproducibilidad de un cuestionario telefónico sobre factores de riesgo asociados al comportamiento y las prácticas preventivas Reproducibility of a telephone questionnaire on risk factors associated with behavior and preventive practices

    Directory of Open Access Journals (Sweden)

    Iñaki Galán

    2004-04-01

    Full Text Available Objetivo: Se evalúa la reproducibilidad del cuestionario utilizado en un sistema de vigilancia de factores de riesgo de enfermedades no transmisibles (SIVFRENT, basado en encuestas continuas con entrevista telefónica. Métodos: El mismo cuestionario fue aplicado telefónicamente en 2 ocasiones a una muestra de 586 personas de 18-64 años representativas de la Comunidad de Madrid, con un intervalo de 13-32 días. Se analizan 27 variables relacionadas con la percepción del estado de salud, antropometría, actividad física, consumo de tabaco y alcohol, prácticas preventivas, accidentalidad y seguridad vial. Para valorar la estabilidad de las respuestas se analizó la concordancia absoluta, los valores del índice kappa sin ponderar y ponderado, y el coeficiente de correlación intraclase (CCI, en las variables categóricas nominales, ordinales y cuantitativas, respectivamente. Resultados: La tasa de respuesta a la segunda entrevista fue del 78,7%, y participaron 461 personas. La comparación de las prevalencias y promedios en las 2 entrevistas refleja que en 19 de los 27 indicadores analizados la desviación relativa fue inferior al 5%, y sólo 2 superaron el 20%. La concordancia absoluta excedió del 85% en 13 de las 20 variables categóricas, y los coeficientes kappa y CCI superaron el valor de 0,8 en 10 variables, en 13 oscilaron entre 0,6 y 0,8, en 3 entre 0,4 y 0,6, y sólo una fue inferior a 0,4. No se observó un patrón uniforme de variables sociodemográficas asociadas a la discordancia. Conclusiones: Los resultados sugieren que el cuestionario telefónico utilizado en el SIVFRENT sobre factores de riesgo asociados al comportamiento y las prácticas preventivas es reproducible en una amplia muestra representativa de la población adulta de la Comunidad de Madrid.Objective: To assess the reproducibility of a questionnaire used in a surveillance system for risk factors of non-communicable diseases (SIVFRENT, based on continuous surveys

  17. Corrosion effects on friction factors

    International Nuclear Information System (INIS)

    Magleby, H.L.; Shaffer, S.J.

    1996-01-01

    This paper presents the results of NRC-sponsored material specimen tests that were performed to determine if corrosion increases the friction factors of sliding surfaces of motor-operated gate valves, which could require higher forces to close and open safety-related valves when subjected to their design basis differential pressures. Friction tests were performed with uncorroded specimens and specimens subjected to accelerated corrosion. Preliminary tests at ambient conditions showed that corrosion increased the friction factors, indicating the need for additional tests duplicating valve operating parameters at hot conditions. The additional tests showed friction factors of corroded specimens were 0.1 to 0.2 higher than for uncorroded specimens, and that the friction factors of the corroded specimens were not very dependent on contact stress or corrosion film thickness. The measured values of friction factors for the three corrosion films tested (simulating three operating times) were in the range of 0.3 to 0.4. The friction factor for even the shortest simulated operating time was essentially the same as the others, indicating that the friction factors appear to reach a plateau and that the plateau is reached quickly

  18. Conversion factors and oil statistics

    International Nuclear Information System (INIS)

    Karbuz, Sohbet

    2004-01-01

    World oil statistics, in scope and accuracy, are often far from perfect. They can easily lead to misguided conclusions regarding the state of market fundamentals. Without proper attention directed at statistic caveats, the ensuing interpretation of oil market data opens the door to unnecessary volatility, and can distort perception of market fundamentals. Among the numerous caveats associated with the compilation of oil statistics, conversion factors, used to produce aggregated data, play a significant role. Interestingly enough, little attention is paid to conversion factors, i.e. to the relation between different units of measurement for oil. Additionally, the underlying information regarding the choice of a specific factor when trying to produce measurements of aggregated data remains scant. The aim of this paper is to shed some light on the impact of conversion factors for two commonly encountered issues, mass to volume equivalencies (barrels to tonnes) and for broad energy measures encountered in world oil statistics. This paper will seek to demonstrate how inappropriate and misused conversion factors can yield wildly varying results and ultimately distort oil statistics. Examples will show that while discrepancies in commonly used conversion factors may seem trivial, their impact on the assessment of a world oil balance is far from negligible. A unified and harmonised convention for conversion factors is necessary to achieve accurate comparisons and aggregate oil statistics for the benefit of both end-users and policy makers

  19. Sequence Factorization with Multiple References.

    Science.gov (United States)

    Wandelt, Sebastian; Leser, Ulf

    2015-01-01

    The success of high-throughput sequencing has lead to an increasing number of projects which sequence large populations of a species. Storage and analysis of sequence data is a key challenge in these projects, because of the sheer size of the datasets. Compression is one simple technology to deal with this challenge. Referential factorization and compression schemes, which store only the differences between input sequence and a reference sequence, gained lots of interest in this field. Highly-similar sequences, e.g., Human genomes, can be compressed with a compression ratio of 1,000:1 and more, up to two orders of magnitude better than with standard compression techniques. Recently, it was shown that the compression against multiple references from the same species can boost the compression ratio up to 4,000:1. However, a detailed analysis of using multiple references is lacking, e.g., for main memory consumption and optimality. In this paper, we describe one key technique for the referential compression against multiple references: The factorization of sequences. Based on the notion of an optimal factorization, we propose optimization heuristics and identify parameter settings which greatly influence 1) the size of the factorization, 2) the time for factorization, and 3) the required amount of main memory. We evaluate a total of 30 setups with a varying number of references on data from three different species. Our results show a wide range of factorization sizes (optimal to an overhead of up to 300%), factorization speed (0.01 MB/s to more than 600 MB/s), and main memory usage (few dozen MB to dozens of GB). Based on our evaluation, we identify the best configurations for common use cases. Our evaluation shows that multi-reference factorization is much better than single-reference factorization.

  20. Sequence Factorization with Multiple References.

    Directory of Open Access Journals (Sweden)

    Sebastian Wandelt

    Full Text Available The success of high-throughput sequencing has lead to an increasing number of projects which sequence large populations of a species. Storage and analysis of sequence data is a key challenge in these projects, because of the sheer size of the datasets. Compression is one simple technology to deal with this challenge. Referential factorization and compression schemes, which store only the differences between input sequence and a reference sequence, gained lots of interest in this field. Highly-similar sequences, e.g., Human genomes, can be compressed with a compression ratio of 1,000:1 and more, up to two orders of magnitude better than with standard compression techniques. Recently, it was shown that the compression against multiple references from the same species can boost the compression ratio up to 4,000:1. However, a detailed analysis of using multiple references is lacking, e.g., for main memory consumption and optimality. In this paper, we describe one key technique for the referential compression against multiple references: The factorization of sequences. Based on the notion of an optimal factorization, we propose optimization heuristics and identify parameter settings which greatly influence 1 the size of the factorization, 2 the time for factorization, and 3 the required amount of main memory. We evaluate a total of 30 setups with a varying number of references on data from three different species. Our results show a wide range of factorization sizes (optimal to an overhead of up to 300%, factorization speed (0.01 MB/s to more than 600 MB/s, and main memory usage (few dozen MB to dozens of GB. Based on our evaluation, we identify the best configurations for common use cases. Our evaluation shows that multi-reference factorization is much better than single-reference factorization.

  1. Factores condicionantes de las operaciones documentales en medios de comunicación

    Directory of Open Access Journals (Sweden)

    Benito Amat, Carlos

    1996-06-01

    Full Text Available Some empirical evidences attribute to news information certain characteristics relevant for its treatment by archives and reference departments of the media. The fact of simultaneous treatment of the same events by almost all media is quoted as «Episodic coincidence». «Ciclyc redundancy» expresses the repeated treatment of various topics at regular time intervals. As in scientific fields, «Matthew effect» points out the existence of concentration-scattering phenomena of news on most public people and some topics. There is also redundancy in physical support, splitting of the messages and a preeminence of compound documents. Some phenomena of «latency», as opposed to the typical obsolescence of scientific documents have also been detected. Use of news information is characterized by a principle of least effort, although this characteristic is dependent of the type of users served. Finally, news documents can change their meaning according to user profiles, user context and appearance of related messages.

    Algunas evidencias empíricas permiten atribuir a la información de actualidad ciertas características que condicionan su tratamiento documental: el tratamiento simultáneo de los mismos hechos informativos por la práctica totalidad de los medios de comunicación en un ámbito determinado; la repetición del tratamiento informativo de hechos similares a intervalos regulares de tiempo; los fenómenos de concentración-dispersión de la información centrada en determinados protagonistas o temas; la existencia de un mismo mensaje en diferentes formatos o soportes físicos; la fragmentación de los mensajes, que implica el tratamiento de un hecho informativo en diversas entregas, que sólo de forma combinada dan cuenta del acontecimiento en cuestión; la existencia de silencios informativos que se interponen durante períodos variables de tiempo a la producción de noticias sobre individuos, grupos e incluso temas; la abundancia

  2. Associated factors with mammographic changes in women undergoing breast cancer screening.

    Science.gov (United States)

    Sant'Ana, Ricardo Soares de; Mattos, Jacó Saraiva de Castro; Silva, Anderson Soares da; Mello, Luanes Marques de; Nunes, Altacílio Aparecido

    2016-01-01

    To evaluate association of sociodemographic, anthropometric, and epidemiological factors with result of mammogram in women undergoing breast cancer screening. This is a cross-sectional study with data obtained through interviews, anthropometric measurements, and mammography of 600 women aged 40 to 69 years at the Preventive Medicine Department of Hospital de Câncer de Barretos, Brazil, in 2014. The results of these examinations in the BI-RADS categories 1 and 2 were grouped and classified in this study as normal mammogram outcome, and those of BI-RADS categories 3, 4A, 4B, 4C, and 5 were grouped and classified as altered mammogram outcome. The statistical analysis included the Student's t-test to compare means, as well as odds ratios (OR), with their corresponding 95% confidence intervals (95%CI), to verify an association by means of the multivariate analysis. Of 600 women evaluated, 45% belonged to the age group of 40-49 years-old and 60.2% were classified as BI-RADS category 2. The multivariate analysis showed that women with blood hypertension (OR: 2.64; 95%CI: 1.07-6.49; pde fatores sociodemográficos, antropométricos e epidemiológicos com o resultado das mamografias de mulheres submetidas ao rastreamento. Trata-se de um estudo transversal com dados obtidos por meio de entrevistas, avaliação antropométrica e mamografia de 600 mulheres entre 40 a 69 anos, atendidas no Departamento de Prevenção do Hospital de Câncer de Barretos, em 2014. Os resultados de tais exames nas categorias BI-RADS 1 e 2 foram agrupados e classificados neste estudo como achado mamográfico normal, e aqueles das categorias BI-RADS 3, 4A, 4B, 4C e 5 como achado mamográfico alterado. Na análise estatística, utilizou-se o teste t de Student para comparar as médias, bem como odds ratio (OR), com seus respectivos intervalos de confiança de 95% (IC95%), na verificação de associação por análise multivariada. Das 600 mulheres avaliadas, 45% pertenciam à faixa etária dos 40 a 49

  3. Timomas y miastenia gravis: Supervivencia y factores pronósticos, catorce años de experiencia

    Directory of Open Access Journals (Sweden)

    Carlos A Martínez Blanco

    2003-09-01

    Full Text Available Se reporta un estudio de cohorte analítico para evaluar factores pronósticos en 34 pacientes con timoma y miastenia gravis, a los cuales se les realizó timectomía, entre enero de 1984 y diciembre de 1998, 22 femeninos y 12 masculinos, con un promedio de edad de 49,7 años. De acuerdo con la clasificación clínica de Masaoka, 14 pertenecieron al estadio I, 2 al II, 12 al III y 6 al IV. Histológicamente 17 fueron mixtos, 9 corticales, 5 medulares y 3 carcinomas tímicos bien diferenciados. Según la clasificación de Osserman 5 enfermos se encontraban en el grupo IIa, 23 en el IIb y 6 en el IV. La vía de acceso fue la esternotomía media. Los pacientes con tumores invasivos recibieron radioterapia y poliquimioterapia adyuvante. El índice de remisión de los síntomas miasténicos al año fue de 53,1%. Hubo 3 fallecidos en el período posoperatorio y 7 tardíamente. El timoma cortical y, en general, los tumores invasivos fueron los de peores resultados. Los factores que más se relacionaron con el pronóstico por su influencia sobre el intervalo libre de enfermedad y la supervivencia a largo plazo, fueron el estadio clínico del tumor, el tipo hístico y el tipo de miasteniaThis paper presents an analytical cohort study to evaluate prognostic factors in 34 patients with thymona and myasthemia gravis whom thymectomy from January 1984 to December 1998. Twenty two were females and 12 males aged 49,7 years of age as average. According to Masaoka´s clinical classification, 14 patients were at stage I; two at stage II, 12 at stage III and 6 at stage IV. From the histological viewpoint, 17 were mixed thymona, 9 cortical thymonas, 5 medullar thymonas and 3 well-differentiated thymic carcinomas. According to Osswerman´s classification, 5 patients were included in group IIa, 23 in group IIb and 6 in group IV. The access pathway was median sternotomy. Remission index of myasthemic symptoms after a year was 53.1%. there were 3 deaths in the

  4. Matrix Factorization for Evolution Data

    Directory of Open Access Journals (Sweden)

    Xiao-Yu Huang

    2014-01-01

    Full Text Available We study a matrix factorization problem, that is, to find two factor matrices U and V such that R≈UT×V, where R is a matrix composed of the values of the objects O1,O2,…,On at consecutive time points T1,T2,…,Tt. We first present MAFED, a constrained optimization model for this problem, which straightforwardly performs factorization on R. Then based on the interplay of the data in U, V, and R, a probabilistic graphical model using the same optimization objects is constructed, in which structural dependencies of the data in these matrices are revealed. Finally, we present a fitting algorithm to solve the proposed MAFED model, which produces the desired factorization. Empirical studies on real-world datasets demonstrate that our approach outperforms the state-of-the-art comparison algorithms.

  5. Crash Data Safety Factors Evaluation

    Science.gov (United States)

    2017-11-30

    The purpose of this project was to identify annual trends and contributory factors of crashes involving mature drivers, vulnerable road users, fatal and injury crashes involving guiderail, and collisions resulting from vehicle failures. Three years o...

  6. Disadvantage factor for anisotropic scattering

    International Nuclear Information System (INIS)

    Saad, E.A.; Abdel Krim, M.S.; EL-Dimerdash, A.A.

    1990-01-01

    The invariant embedding method is used to solve the problem for a two region reactor with anisotropic scattering and to compute the disadvantage factor necessary for calculating some reactor parameters

  7. Factorization properties of finite spaces

    Energy Technology Data Exchange (ETDEWEB)

    Simkhovich, B; Mann, A; Zak, J, E-mail: boriskas@tx.technion.ac.i, E-mail: ady@physics.technion.ac.i, E-mail: zak@physics.technion.ac.i [Department of Physics, Technion-Israel Institute of Technology, Haifa 32000 (Israel)

    2010-01-29

    In 1960 Schwinger (J Schwinger 1960 Proc. Natl Acad. Sci. 46 570-9) proposed the algorithm for factorization of unitary operators in the finite M-dimensional Hilbert space according to a coprime decomposition of M. Using a special permutation operator A we generalize the Schwinger factorization to every decomposition of M. We obtain the factorized pairs of unitary operators and show that they obey the same commutation relations as Schwinger's. We apply the new factorization to two problems. First, we show how to generate two kq-like mutually unbiased bases for any composite dimension. Then, using a Harper-like Hamiltonian model in the finite dimension M = M{sub 1}M{sub 2}, we show how to design a physical system with M{sub 1} energy levels, each having degeneracy M{sub 2}.

  8. Lithuanian Population Aging Factors Analysis

    Directory of Open Access Journals (Sweden)

    Agnė Garlauskaitė

    2015-05-01

    Full Text Available The aim of this article is to identify the factors that determine aging of Lithuania’s population and to assess the influence of these factors. The article shows Lithuanian population aging factors analysis, which consists of two main parts: the first describes the aging of the population and its characteristics in theoretical terms. Second part is dedicated to the assessment of trends that influence the aging population and demographic factors and also to analyse the determinants of the aging of the population of Lithuania. After analysis it is concluded in the article that the decline in the birth rate and increase in the number of emigrants compared to immigrants have the greatest impact on aging of the population, so in order to show the aging of the population, a lot of attention should be paid to management of these demographic processes.

  9. Nutritional factors in gallbladder diseases

    Directory of Open Access Journals (Sweden)

    Thaiane Prolo

    2018-01-01

    Full Text Available Biliary system disorders are all diseases that affect the gallbladder and the ducts. They may be originated from various etiologies. Inadequate living habits, being female and smoking are risk factors for the development of these diseases, as well as poor nutrition, nutritional deficiencies, obesity and metabolic syndrome. However, the adequate consumption of fruits and vegetables and the regular practice of physical activity act as protective factors for these diseases.

  10. Environmental risk factors and pressures

    International Nuclear Information System (INIS)

    Klinda, J.; Lieskovska, Z.

    1998-01-01

    In this chapter the physical risk factors (as radiation [air contamination, contamination of the environment components and food contamination], radon and its radioactive decay products, radioactive wastes, noise), chemical risk factors [chemical substances, xenobiotics in the food chain the ozone depletion], wastes (waste generation, waste management, municipal waste management, import, export and transit of waste) and natural an technological hazards (water quality deterioration as a result of various accidents and fire risk) in the Slovak Republic in 1997 are reviewed

  11. Factors Influencing Healthcare Service Quality

    OpenAIRE

    Ali Mohammad Mosadeghrad

    2014-01-01

    Background The main purpose of this study was to identify factors that influence healthcare quality in the Iranian context. Methods Exploratory in-depth individual and focus group interviews were conducted with 222 healthcare stakeholders including healthcare providers, managers, policy-makers, and payers to identify factors affecting the quality of healthcare services provided in Iranian healthcare organisations. Results Quality in healthcare is a production o...

  12. Growth factors and new periodontology

    Directory of Open Access Journals (Sweden)

    Paknejad M

    1999-06-01

    Full Text Available Growth factors are biological mediators that have a key roll in proliferation, chemotaxy and"ndifferentiation by acting on specific receptors on the surface of cells and regulating events in wound"nhealing.They can be considered hormones that are not released in to the blood stream but have one a"nlocal action. Some of these factors can regulate premature change in GO to Gl phase in cell devesion"ncycle and even may stimulate synthesis of DNA in suitable cells, Growth substances, primarily secreted"nby fibroblasts, endothelia! cells, macrophages and platelet, include platelet derived growth factor"n(PDGF, insulin like growth factor (IGF transforming growth factor (TGFa and (3 and bone"nmorphogenetic proteins BMPs that approximately are the most important of them. (BMPs could be"nused to control events during periodontal, craniofacial and implant wound healing through favoring bone"nformation"nAccording toLynch, combination of PGDF and IGF1 would be effective in promoting growth of all the"ncomponents of the periodontium."nThe aim of this study was to characterize growth factor and review the literature to determine the"nmechanism of their function, classification and application in implant and periodontal treatment.

  13. Prevalência, fatores de risco e genótipos da hepatite C entre usuários de drogas Prevalencia, factores de riesgo y genotipos de la hepatitis C entre usuarios de drogas Prevalence, risk factors and genotypes of hepatitis C virus infection among drug users, Central-Western Brazil

    Directory of Open Access Journals (Sweden)

    Carmen L R Lopes

    2009-08-01

    Full Text Available OBJETIVO: Estimar a prevalência e fatores associados à infecção pelo vírus da hepatite C em usuários de drogas e identificar os genótipos e subtipos virais circulantes. MÉTODOS: Estudo realizado com 691 usuários de drogas de 26 centros de tratamento de uso de drogas filantrópicos, particulares e públicos de Goiânia (GO e Campo Grande (MS, entre 2005 e 2006. Dados sociodemográficos e fatores de risco para infecção pelo HCV foram obtidos por meio de entrevistas. Amostras sangüíneas foram testadas para a detecção de anticorpos para o HCV. As amostras positivas foram submetidas à detecção do RNA-HCV pela reação em cadeia da polimerase com iniciadores complementares às regiões 5' NC e NS5B do genoma viral e genotipadas pelo line probe assay (LiPA e por seqüenciamento direto, seguido de análise filogenética. Prevalência e odds ratio foram calculados com intervalo de 95% de confiança. Os fatores de risco com pOBJETIVO: Estimar la prevalencia y factores asociados a la infección por el virus de la hepatitis C en usuarios de drogas e identificar los genotipos y subtipos virales circulantes. MÉTODOS: Estudio realizado con 691 usuarios de drogas de 26 centros de tratamiento de uso de drogas filantrópicos, particulares y públicos de Goiania y Campo Grande (Centro-Oeste, entre 2005 y 2006. Datos sociodemográficos y factores de riesgo para infección por el HCV fueron obtenidos por medio de entrevistas. Muestras sanguíneas fueron evaluadas para la detección de anticuerpos para el HCV. Las muestras positivas fueron sometidas a la detección de RNA-HCV por la reacción en cadena de polimerasa con iniciadores complementarios a las regiones 5' NC y NS5B del genoma viral y genotipadas por el line probe assay (LiPA y por secuenciación directa, seguido del análisis filogenético. Prevalencia y odds ratio fueron calculados con intervalo de 95% de confianza. Los factores de riesgo con pOBJECTIVE: To estimate prevalence of

  14. Variabilidade espacial de fatores de erosão em Latossolo Vermelho eutroférrico sob cultivo de cana-de-açúcar Spatial variability of the erosion factors in eutrudox Red Latosol under sugarcane crop

    Directory of Open Access Journals (Sweden)

    Zigomar M. de Souza

    2005-04-01

    Full Text Available Visando a avaliar a variabilidade espacial de fatores de erosão em Latossolo Vermelho eutroférrico, foram obtidas amostras do solo em intervalos regulares de 50 m, em forma de grid, totalizando 206 pontos de amostragem. Foram coletadas amostras nas profundidades de 0,0-0,2 m para a determinação da composição granulométrica e do conteúdo de matéria orgânica. Os fatores de erosão locais, como erosividade (R, erodibilidade (K, relevo (LS, perda de solo (A, potencial natural de erosão (PNE, risco de erosão (RE e expectativa de erosão (EE, foram avaliados. A variabilidade do solo medida pelo coeficiente de variação registrou-se média para K, alta para o RE e EE e muito alta para A, LS e PNE. As variáveis estudadas apresentaram estrutura de dependência espacial com grau moderado para as variáveis K, A, PNE e RE, e forte para o LS e EE. Mapas obtidos por krigagem foram apresentados para descrição dos padrões de distribuição dos fatores de erosão na paisagem.The objective of this work was to evaluate the spatial variability of soil erosion factors on a Dark Red Oxisol under sugarcane conventional tillage. Soil samples were collected in 206 points, in a depth of 0.0-0.2 m, located in a 50 m regular grid for obtaining the soil texture and organic matter content. The local erosion factors were determined: erosivity (R, erodibility (K, relief (LS, soil erosion (A, natural potential of erosion (PNE, erosion risk (RE and erosion expectation (EE. Geostatistical analysis was performed to measure and model the spatial variability of soil erosion factors. The soil variability was moderate with K, A, and PNE while the soil variability was higher with LS, RE, and EE. K, A, and PNE exhibited moderate spatial dependence, but spatial dependence of LS, RE and EE was strong. Kriging maps were presented for understanding of soil erosion factors distribution patterns within the landscape.

  15. Prevalência e fatores associados à obesidade abdominal em adolescentes Prevalencia y factores asociados a la obesidad abdominal en adolescentes Prevalence of abdominal obesity and associated factors in adolescents

    Directory of Open Access Journals (Sweden)

    Marcelo Romanzini

    2011-12-01

    Full Text Available OBJETIVO: Verificar a prevalência de obesidade abdominal e sua associação com fatores demográficos, econômicos e estilo de vida em adolescentes. MÉTODOS: Estudo transversal conduzido em 644 adolescentes (397 do sexo feminino e 247 do masculino, de 15 a 19 anos. Foram coletadas informações demográficas (sexo e idade, econômicas (nível econômico e comportamentais (atividade física, alimentação, tabagismo e etilismo. A obesidade abdominal (desfecho foi determinada com base em pontos de corte para a circunferência de cintura, específicos ao sexo e à idade. A análise multivariada foi realizada por meio de regressão logística, estimando-se Odds Ratios (OR brutas e ajustadas, com intervalo de confiança de 95%. RESULTADOS: A prevalência de obesidade abdominal foi de 7,5%. Adolescentes do sexo masculino (OR 2,34; IC95% 1,27-4,32, de nível econômico intermediário (OR 2,89; IC95% 1,35-6,19 e alto (OR 2,98; IC95% 1,31-6,77 e que consumiam bebida alcoólica de forma abusiva (OR 2,12; IC95% 1,10-4,09 apresentaram maior chance de possuírem obesidade abdominal. CONCLUSÕES: A prevalência de obesidade abdominal foi baixa em comparação aos estudos internacionais. Ademais, encontrou-se que o sexo, o nível econômico e o consumo abusivo de álcool se associaram à obesidade abdominal.OBJETIVO: Verificar la prevalencia de obesidad abdominal y su asociación con factores demográficos, económicos y estilo de vida en adolescentes. MÉTODOS: Estudio transversal conducido en 644 adolescentes (397 del sexo masculino y 247 del femenino de 15 a 18 años. Se recogieron informaciones demográficas (sexo, edad, económicas (nivel económico y comportamentales (actividad física, alimentación, tabaquismo, alcoholismo. La obesidad abdominal (desfecho fue determinada con base en puntos de corte para la circunferencia de la cintura, específicos al sexo y la edad. El análisis multivariado se realizó mediante regresión logística, estimando

  16. Multi-factor authentication using quantum communication

    Science.gov (United States)

    Hughes, Richard John; Peterson, Charles Glen; Thrasher, James T.; Nordholt, Jane E.; Yard, Jon T.; Newell, Raymond Thorson; Somma, Rolando D.

    2018-02-06

    Multi-factor authentication using quantum communication ("QC") includes stages for enrollment and identification. For example, a user enrolls for multi-factor authentication that uses QC with a trusted authority. The trusted authority transmits device factor information associated with a user device (such as a hash function) and user factor information associated with the user (such as an encrypted version of a user password). The user device receives and stores the device factor information and user factor information. For multi-factor authentication that uses QC, the user device retrieves its stored device factor information and user factor information, then transmits the user factor information to the trusted authority, which also retrieves its stored device factor information. The user device and trusted authority use the device factor information and user factor information (more specifically, information such as a user password that is the basis of the user factor information) in multi-factor authentication that uses QC.

  17. Fatores de risco para diárreia persistente em lactentes Risk factors to persistent diarrhea in infants

    Directory of Open Access Journals (Sweden)

    Maria das Graças Moura Lins

    2003-12-01

    Full Text Available RACIONAL: A diarréia persistente é uma doença multicausal. A análise do risco para o prolongamento do quadro diarréico envolve variáveis ambientais, biológicas e do manejo clínico. OBJETIVO: Identificar fatores de risco para a diarréia persistente em crianças hospitalizadas na fase aguda do quadro diarréico. PACIENTES E MÉTODOS: O estudo foi do tipo caso-controle. A amostra consistiu de 216 crianças menores de 24 meses hospitalizadas por diarréia de início abrupto, no Instituto Materno-Infantil de Pernambuco, Recife, PE. O grupo de casos incluiu as crianças com diarréia persistente e o de controles aquelas com diarréia aguda. Foram analisadas variáveis socioeconômicas, biológicas, de morbidade anterior, clínicas e do manejo terapêutico prévio à admissão. Utilizou-se o odds ratio não ajustado e ajustado, com seus respectivos intervalos de confiança de 95%, observando-se o nível de significância de 5%. A análise multivariada foi feita através de regressão logística. RESULTADOS: O risco de persistência da diarréia foi maior nas crianças com: disenteria, febre no início do quadro, dieta suspensa e uso de antibiótico à admissão hospitalar. O risco de diarréia persistente foi cerca de três vezes maior para crianças sem geladeira no domicílio e que apresentavam hiperemia perianal ao exame físico na admissão hospitalar, sendo estas as variáveis que apresentaram significância estatística após o ajuste para fatores de confusão. CONCLUSÕES: A melhoria das condições ambientais e o manejo adequado e individualizado da criança hospitalizada por diarréia pode contribuir para a redução da morbidade da doença.BACKGROUND: Persistent diarrhea is a multicausal disease. The analysis of risk factors for persistent diarrhea includes environmental and biological variables as well as therapeutical management. AIM: To identify risk factors for persistent diarrhea among children hospitalized with acute diarrhea

  18. Fatores associados à pneumonia nosocomial em indivíduos hospitalizados Factors associated with nosocomial pneumonia in hospitalized individuals

    Directory of Open Access Journals (Sweden)

    Thaís Feitosa Leitão de Oliveira

    2011-12-01

    Full Text Available OBJETIVO: Identificar os fatores associados à pneumonia nosocomial em hospital público de Feira de Santana, Bahia. MÉTODOS: Este estudo caso-controle foi realizado em 211 indivíduos adultos (46 casos e 165 controles, com idade média de 41 anos, atendidos na Clínica Médica, Clínica Cirúrgica ou na Unidade de Terapia Intensiva Adulta do Hospital Geral Clériston Andrade, em Feira de Santana. Os casos foram constituídos por indivíduos que desenvolveram infecção do trato respiratório (pneumonia nosocomial após admissão hospitalar. Os controles foram formados por não portadores de pneumonia nosocomial. Informações socioeconómicas, história médica, estilo de vida e hábitos de higiene bucal foram obtidos por meio de entrevistas. Os prontuários foram checados para registro da condição de saúde do indivíduo e diagnóstico de pneumonia. Exame clínico bucal foi realizado por cirurgião-dentista treinado. Na análise bivariada, foi estimado o odds ratio (OR como medida de associação e seus respectivos intervalos de confiança de 95% (IC 95% com uso do método de Mantel-Haenzel. RESULTADOS: A frequência de pneumonia nosocomial na amostra foi de 21,8%. A ocorrência de hipertensão e o tempo de internamento foram maiores nos casos do que nos controles (p 5 dias e ausência do fio dental e enxaguatório bucal como fatores possivelmente associados à pneumonia nosocomial, apontando-os como alvos efetivos de prevençãoOBJECTIVE: To identify factors associated with nosocomial pneumonia in individuals admitted to apublic hospital in Feira de Santana, Bahia. METHODS: This case control study was carried out in 211 adult individuals (46 cases and 165 controls, of a mean age of 41 years, treated at clinical wards, surgical wards or the adult intensive care unit of Cleriston Andrade General Hospital in Feira de Santana. The cases comprised individuals who developed respiratory tract infections (nosocomial pneumonia after hospital

  19. Factors Influencing Heart Rate Variability

    Directory of Open Access Journals (Sweden)

    Stefan Sammito

    2016-01-01

    Full Text Available The measurement and analysis of heart rate variability (HRV, which is based on the variation between consecutive NN intervals, has become an established procedure over the past two decades. A decrease in HRV has been shown to correlate with an increase in mortality. HRV is influenced by a number of physiological factors such as various diseases. Awareness of these mediators or confounders is of great importance in the analysis and assessment of HRV both in scientific studies and in clinical practice. This document, which is based on a selective survey of references and supplemented by information from national and international guidelines, presents the main endogenous, exogenous and constitutional factors. A decrease in HRV has been observed not only in connection with non-influenceable physiological factors such as age, gender and ethnic origin, but also in conjunction with a large number of acute and chronic diseases. Numerous lifestyle factors have both a positive and a negative influence on HRV. There are also physical influences that affect HRV. They must on no account be disregarded. Although the list of the factors is long and not all of them have yet been fully studied, awareness of them is of crucial importance in the measurement of HRV (both under laboratory conditions and during medical practice, its analysis and its assessment. More research also needs to be carried out to close knowledge gaps.

  20. Factors Influencing Healthcare Service Quality

    Directory of Open Access Journals (Sweden)

    Ali Mohammad Mosadeghrad

    2014-07-01

    Full Text Available Background The main purpose of this study was to identify factors that influence healthcare quality in the Iranian context. Methods Exploratory in-depth individual and focus group interviews were conducted with 222 healthcare stakeholders including healthcare providers, managers, policy-makers, and payers to identify factors affecting the quality of healthcare services provided in Iranian healthcare organisations. Results Quality in healthcare is a production of cooperation between the patient and the healthcare provider in a supportive environment. Personal factors of the provider and the patient, and factors pertaining to the healthcare organisation, healthcare system, and the broader environment affect healthcare service quality. Healthcare quality can be improved by supportive visionary leadership, proper planning, education and training, availability of resources, effective management of resources, employees and processes, and collaboration and cooperation among providers. Conclusion This article contributes to healthcare theory and practice by developing a conceptual framework that provides policy-makers and managers a practical understanding of factors that affect healthcare service quality.

  1. Study of angiogenic factors: Vascular endothelia growth factor ...

    African Journals Online (AJOL)

    The pre-therapeutic serum levels of the angiogenic factors VEGF and bFGF were detected in the sera of HCC patients to find new markers to be used for diagnosis of HCC, and were compared with the routinely used tumor markers used for diagnosis of HCC as AFP, CEA, and CA19.9. The relation between the serum levels ...

  2. Which shape factor(s) best describe granules?

    NARCIS (Netherlands)

    Bouwman, Anneke M.; Bosma, Jaap C.; Vonk, Pieter; Wesselingh, J.A.; Frijlink, Henderik W.

    2004-01-01

    This study evaluates methods used for granule shape characterization. The aim is to identify an optimal combination of shape factors to measure granule shape and roughness. Granules were prepared from microcrystalline cellulose (MCC), alpha-lactose, microfine cellulose (MFC), and dextrin, using a

  3. General Factors of the Korean Exposure Factors Handbook

    Science.gov (United States)

    Kim, So-Yeon; Kim, Sun-Ja; Lee, Kyung-Eun; Cheong, Hae-Kwan; Kim, Eun-Hye; Choi, Kyung-Ho; Kim, Young-Hee

    2014-01-01

    Risk assessment considers the situations and characteristics of the exposure environment and host. Various physiological variables of the human body reflects the characteristics of the population that can directly influence risk exposure. Therefore, identification of exposure factors based on the Korean population is required for appropriate risk assessment. It is expected that a handbook about general exposure factors will be used by professionals in many fields as well as the risk assessors of the health department. The process of developing the exposure factors handbook for the Korean population will be introduced in this article, with a specific focus on the general exposure factors including life expectancy, body weight, surface area, inhalation rates, amount of water intake, and soil ingestion targeting the Korean population. The researchers used national databases including the Life Table and the 2005 Time Use Survey from the National Statistical Office. The anthropometric study of size in Korea used the resources provided by the Korean Agency for Technology and Standards. In addition, direct measurement and questionnaire surveys of representative samples were performed to calculate the inhalation rate, drinking water intake, and soil ingestion. PMID:24570802

  4. Violencia física marital en Barranquilla (Colombia: prevalencia y factores de riesgo Marital violence in Barranquilla (Colombia: prevalence and risk factors

    Directory of Open Access Journals (Sweden)

    R. Tuesca

    2003-07-01

    Full Text Available Objetivos: Determinar la prevalencia de maltrato físico marital en mujeres en edad fértil que viven con su pareja, así como identificar factores personales, socioeconómicos y de función familiar que se relacionen con el maltrato. Métodos: Estudio transversal sobre una muestra aleatoria de 275 mujeres en edad fértil del barrio Carlos Meissel, de la ciudad de Barranquilla, Colombia. La información se obtuvo mediante entrevista personal en el hogar a partir de un cuestionario estructurado y siguiendo las recomendaciones éticas y de seguridad para la investigación sobre violencia doméstica contra mujeres de la Organización Mundial de la Salud. En el cuestionario se recogen datos sobre características personales, consumo habitual de alcohol y drogas, función familiar (según test de Apgar Familiar, características socioeconómicas y antecedentes de maltrato físico durante los 12 meses previos a la entrevista. Resultados: La prevalencia de maltrato marital fue del 22,9%, y el grupo de 25-29 años es el más afectado (33,3%. Se asociaron con el maltrato físico el consumo habitual de alcohol en las mujeres (odds ratio, OR = 6,02; intervalo de confianza del 95%, IC del 95%, 1,7-22,2 y en el cónyuge (OR = 10,11; IC del 95%, 5,1-20,1 y el consumo de sustancias psicoactivas en el cónyuge (OR = 11.01; IC del 95%, 4,2-29,5. Los ingresos mensuales por debajo de 300.000 pesos colombianos (140 euros también se asociaron con maltrato, así como presencia de disfunción familiar moderada o grave (OR = 16,9; IC del 95%, 4,8-59,0; OR = 81,6; IC del 95%, 18,8-35,5, respectivamente. Conclusiones: La naturaleza transversal del estudio limita la interpretación de los resultados. Sin embargo, se ha observado que en las mujeres de la muestra estudiada en este estudio el maltrato físico de la mujer por parte de su pareja se asocia con factores potencialmente modificables.Objective: To determine the prevalence of violence against women of fertile age

  5. Prevalencia de depresión y factores asociados con ella en la población colombiana The prevalence of and factors associated with depression in Colombia

    Directory of Open Access Journals (Sweden)

    Carlos Gómez-Restrepo

    2004-12-01

    Full Text Available OBJETIVOS: Analizar la prevalencia del síndrome depresivo y los factores asociados con la depresión en Colombia entre los años 2000 y 2001. MÉTODOS: Para este estudio descriptivo de corte transversal se aplicó una encuesta entre noviembre de 2000 y enero de 2001 a 1 116 adultos de 18 años de edad o más de uno u otro sexo que residían en viviendas particulares seleccionadas mediante un muestreo representativo nacional polietápico, estratificado según el grado de urbanización del área incluida en el muestreo. La depresión se clasificó en breve, subclínica o clínica (leve, moderada o grave en los 30 días y los 12 meses previos a la entrevista. Se calcularon las frecuencias simples y estratificadas por la edad y el sexo, y los intervalos de confianza de 95% (IC95% de más de 500 variables. La asociación de las variables seleccionadas con episodios depresivos se evaluó mediante un modelo de regresión logística con múltiples variables. RESULTADOS: De las personas estudiadas, 10,0% (IC95%: 9,2 a 10,7 presentaron algún episodio depresivo en los 12 meses previos a la encuesta y 8,5% (IC95%: 7,8 a 9,2 sufrieron alguno durante el último mes. Hubo una mayor proporción de mujeres con depresión en ambos períodos. Más de 50% de los episodios fueron moderados, tanto en hombres como en mujeres, y las mayores prevalencias se encontraron en las personas mayores de 45 años. Los factores asociados con la depresión en el último mes fueron ser mujer, considerar el estado de salud propio como regular o malo, sufrir de dolores o molestias, tener dificultades en las relaciones interpersonales, consumir marihuana o sustancias adictivas, medicamentos estimulantes o calmantes, tener dependencia del alcohol, o estar desempleado con discapacidad. CONCLUSIÓN: La depresión es una afección frecuente en Colombia. Se deben poner en marcha medidas dirigidas a reducir el riesgo de depresión, especialmente en mujeres y en personas mayores de 45 a

  6. Factors Driving Business Intelligence Culture

    Directory of Open Access Journals (Sweden)

    Rimvydas Skyrius

    2016-05-01

    Full Text Available The field of business intelligence (BI, despite rapid technology advances, continues to feature inadequate levels of adoption. The attention of researchers is shifting towards hu-man factors of BI adoption. The wide set of human factors influencing BI adoption con-tains elements of what we call BI culture – an overarching concept covering key managerial issues that come up in BI implementation. Research sources provide different sets of features pertaining to BI culture or related concepts – decision-making culture, analytical culture and others. The goal of this paper is to perform the review of research and practical sources to examine driving forces of BI – data-driven approaches, BI agility, maturity and acceptance – to point out culture-related issues that support BI adoption and to suggest an emerging set of factors influencing BI culture.

  7. Critical factors for EIA implementation

    DEFF Research Database (Denmark)

    Zhang, Jasmine; Kørnøv, Lone; Christensen, Per

    2013-01-01

    After decades of development, the gap between expectations of Environment Impact Assessments (EIA) and their practical performance remains significant. Research has been done to identify the critical factors for an effective implementation of EIA. However, this research, to a large extent, has...... not been cumulated and analysed comprehensively according to the stages of the EIA process. This paper contributes to the critical review of the literature on EIA implementation and effectiveness by cumulating mainly empirical findings in an implementation theoretical perspective. It focuses on the links...... between different critical factors and how they relate to different stages in the EIA and thus influence the decision making process. After reviewing 33 refereed journal articles published between 1999 and 2011, we identified 203 notions of critical factors. Of these, 102 related to different stages...

  8. Success factors in technology development

    Science.gov (United States)

    Preston, John T.

    1995-01-01

    Universities in the U.S. have a significant impact on business through the transfer of technology. This paper describes goals and philosophy of the Technology Licensing Office at the Massachusetts Institute of Technology. This paper also relates the critical factors for susscessful technology transfer, particularly relating to new business formation. These critical factors include the quality of the technology, the quality of the management, the quality of the investor, the passion for success, and the image of the company. Descriptions of three different levels of investment are also given and the most successful level of investment for starting a new company is reviewed. Licensing to large companies is also briefly reviewed, as this type of licensing requires some different strategies than that of licensing to start-up companies. High quality critical factors and intelligent investment create rewards for the parties and successful ventures.

  9. Perinatal risk factors including malformation

    International Nuclear Information System (INIS)

    Brachner, A.; Grosche, B.

    1991-10-01

    The study gives a survey of the factors most frequently mentioned in the literature as factors likely to adversely affect a pregnancy. One essential aspect is the discussion of those factors that can be counted among the causes of malformations, as among others, prenatal radiation exposure. The study prepared within the framework of the research project 'Radiobiological environmental monitoring in Bavaria' is intended to serve as a basis for a retrospective and prospective evaluation of infant mortality, perinatal conditions and occurrence of malformations in Bavaria, with the principal idea of drawing up an environment - related health survey. The study therefore, in addition to ionizing radiation also takes into account other detectable risks within the ecologic context, as e.g. industrial installations, refuse incineration plants or waste dumps, or urbanity. (orig./MG) [de

  10. An unsymmetrized multifrontal LU factorization

    Energy Technology Data Exchange (ETDEWEB)

    Amestoy, Patrick R.; Puglisi, Chiara

    2000-07-17

    A well-known approach to compute the LU factorization of a general unsymmetric matrix bf A is to build the elimination tree associated with the pattern of the symmetric matrix A + A{sup T} and use it as a computational graph to drive the numerical factorization. This approach, although very efficient on a large range of unsymmetric matrices, does not capture the unsymmetric structure of the matrices. We introduce a new algorithm which detects and exploits the structural unsymmetry of the submatrices involved during the process of the elimination tree. We show that with the new algorithm significant gains both in memory and in time to perform the factorization can be obtained.

  11. The selection of occupancy factors

    International Nuclear Information System (INIS)

    Lakey, J.R.A.

    1977-01-01

    An estimate of the proportion of time that an area is occupied by radiation workers is often used in radiological protection to permit relaxation of exposure rate limits above those for continuous occupation. This proportion is known as an occupancy factor and is used most frequently in X-ray facilities. The strategy for controlling the external exposure of radiation workers must be decided before occupancy factors are selected for the design of the radiation protection facilities. When shielding has to be designed the occupancy factor effects the design objectives and permits increased exposure rates at the shield surface. It is useful to note that the selection of occupancy factors with due regard to the expected spatial variation of the exposure rate can help to reduce the range of the worker's radiation exposure because field gradients are usually steeper close to the shield. When other hazards, such as internal exposure, and other constraints, such as cost of the space consumed, are added, the selection of the optimum set of occupancy factors is more difficult. Two zone occupancy factors are discussed in this paper and proposals are made for a strategy to be used when there is more than one hazard and the designer has to meet constraints imposed by limitations of the facilities available. An important feature of the strategy is the avoidance of high radiation exposure to small groups of workers. The errors involved in assessment of the actual dose received by the radiation worker must be taken into account and in particular the selection of the higher exposure rate limits must be made with attention to the accident potential

  12. Theoretical difference between impact factor and influence factor

    Directory of Open Access Journals (Sweden)

    Đilda Pečarić

    2010-06-01

    Full Text Available Bibliometric constructions of "knowledge maps" and "cognitive structures of science" do not differentiate between impact and influence factors. The difference can be constructedaccording to different meaning and interpretation of the terms reference and citation. Reference is "acknowledgment which one author gives to another", whereas citation is "acknowledgment which one document receives from another". Development of Information Science according to period and subject area is analyzed on the corpus of citation literature retrieved from doctoral dissertations in Information Science from 1978 to 2007 at Croatian universities. The research aim is to indicate the difference between document impact factor and author's influence factor (i.e. reference ability to produce effects on actions, behavior, and opinions of authors of doctoral theses. The influence factor serves to distinguish the key role of cited authors in time and according to the duration of the influence (the average age for cited papers of dominant authors in different periods is between eight and ten years. The difference between linear and interactive communication seems vital for the interpretation of cited half-life, i.e. the attitude of one science community towards used information resources and cognitive heritage. The analyzed corpus of 22,210 citations can be divided into three communication phases according to influence factor criteria: in the phase of dialogue and interactive communication 25% of bibliographic units are cited in the first four years; in the second phase another 25% of units are cited from the fifth to the ninth year; after ten years, in the dominant linear communication phase, approximately 30% of units are cited.

  13. Factores de riesgo del peso al nacer desfavorable en áreas periféricas de Guadalajara, México

    Directory of Open Access Journals (Sweden)

    González-Pérez Guillermo J.

    1995-01-01

    Full Text Available Este estudio busca identificar la incidencia del peso al nacer desfavorable (PND - < 3000 gramos -,los factores asociados a esta condición, y la probabilidad que tiene un niño de nacer con un peso inferior a 3000 gramos en presencia o ausencia de los factores de riesgo identificados, en áreas periféricas de la Zona Metropolitana de Guadalajara (ZMG, México. Para ello, se seleccionó una muestra de nacidos vivos en 1991, hijos de madres derechohabientes del Instituto Mexicano del Seguro Social (IMSS residentes en Tlaquepaque y Tonalá (municipios conurbados a la ZMG; el diseño de la muestra fue probabilístico y polietápico, siendo representativo de la población estudiada. Se seleccionaron aleatoriamente, en primer lugar, Unidades de Medicina Familiar de las zonas estudiadas, y posteriormente, consultorios en cada una de las Unidades elegidas. De estos consultorios fueron estudiados todos los nacidos vivos: el total de recién nacidos en la muestra fue 141. A las madres de los infantes seleccionados se les aplicó un cuestionario con diferentes módulos, por parte de trabajadoras sociales especialmente capacitadas para ello. A través del empleo de la regresión logística, se estimaron "odds ratios" (OR, con intervalos de confianza (IC del 95%, para establecer la posible asociación entre los factores analizados y el peso al nacer inferior a 3000 gramos. También se calculó la probabilidad de que un niño tuviera PND en presencia o ausencia de los factores de riesgo identificados. Los resultados ponen de manifiesto que el 22% de los infantes estudiados nacieran con un peso inferior a 3000 gramos; como factores de riesgo del PND fueron identificados la edad de la madre igual o superior a 35 años (OR 18.47, IC 1.8683.54, el trabajo materno fuera del hogar (OR 3.14, IC 1.15-8.59, el bajo peso materno (OR 5.04, IC 1.04-24.47, y la captación tardía del embarazo (OR 2.64, IC 1.02-6.84. En presencia de todos los factores de riesgo

  14. Effectiveness of human factors simulator

    International Nuclear Information System (INIS)

    Moragas, F.

    2015-01-01

    En 2011, ANAV started the exploitation of the Human Factors Simulator installed in TECNATOM Training Center located in L'Hospital de L'Infant Tarragona. AVAN's Strategic Plan includes the Action Plan for the improvement of human behavior. The plan includes improving the efficiency of the efficiency of the human factors simulator. It is proposed to improve the efficiency into two different terms: winning effectiveness in modeling behaviors, and interweaving the activities in the simulator with the actual strategy of promoting Safety culture and human behaviour. (Author)

  15. The gamma contamination food factor

    International Nuclear Information System (INIS)

    Kukoc, A.H.; Anicin, I.V.; Adzic, P.R.

    1992-01-01

    We suggest that radioactive food contamination, as determined solely by a quantitative gamma-ray spectroscopic measurement, may, apart from the total activity per unit mass, be for quick reference conveniently characterized by another single figure which we call the ''Gamma Contamination Food Factor'' (GCFF). This factor may be defined as the ratio of the total specific activity of gamma-ray-emitting radionuclides in the food sample (except that of 40 K) to the specific activity of 40 K either in the sample itself or in an ''average man''. We discuss briefly the meaning and advantages of these definitions. (author)

  16. Determining Factors of Subsidiary Development

    DEFF Research Database (Denmark)

    Pedersen, Torben

    (the depth of activities) and level of integration in the internal MNC-network. Birkinshaw and Hood (1998a) have in their seminal paper proposed a model where subsidiary development is determined by three factors: Headquarter assignment, dynamism of local business environment and subsidiary initiatives....... This paper is the first to conduct a statistical test of this model on a large-sample data set including data of more than 2.100 subsidiaries located in seven different countries in Europe. The effect of the three determining factors on subsidiary development is tested simultaneously in a LISREL model....

  17. Factores de crecimiento III: factores transformadores del crecimiento (TGF Growth factors III part: transforming growth factors (TGF

    Directory of Open Access Journals (Sweden)

    Hilda Norha Jaramillo Londoño

    1996-04-01

    Full Text Available Se presenta una revisión de los conceptos básicos sobre los factores transformadores del crecimiento, tanto alfa como beta, incluyendo los siguientes aspectos: consideraciones generales, estructura bioquímica, concentraciones, proteínas transportadoras, receptores, mecanismos de acción y efectos biológicos. A review is presented on the basic concepts of Transforming Growth Factors both a and p; it includes general considerations, biochemical structure, concentrations, binding proteins, receptors, mechanisms of action, and biological effects.

  18. Efficiency factors in Mie scattering

    International Nuclear Information System (INIS)

    Nussenzveig, H.M.

    1980-04-01

    Asymptotic approximation to the Mie efficiency factors for extinction, absorption and radiation pressure, derived from complex angular momentum theory and averaged over Δβ approximately π (β = size parameter), are given and compared with the exact results. For complex refractive indices N = n + i kappa with 1.1 -2 - 10 -3 % between β = 10 and β = 1000, and computing time is reduced by a factor of order β, so that the Mie formulae can advantageously by replaced by the asymptotic ones in most applications. (Author) [pt

  19. Factores de riesgo de la enfermedad periodontal: factores genéticos Risks factors in periodontal diseases: genetic factors

    OpenAIRE

    M. Rioboo Crespo; A. Bascones

    2005-01-01

    Hoy en día y tras numerosos estudios epidemiológicos, se acepta el concepto de la existencia de determinados factores de riesgo que van a modular la susceptibilidad o resistencia del hospedador a padecer enfermedad periodontal, por lo tanto, en el desarrollo van a intervenir varias causas considerándose dicha patología de etiología multifactorial. De este modo, las enfermedades periodontales son producidas por una interacción de un agente microbiano único o múltiple considerado como el factor...

  20. General introduction and recovery factors

    Science.gov (United States)

    Verma, Mahendra K.

    2017-07-17

    IntroductionThe U.S. Geological Survey (USGS) compared methods for estimating an incremental recovery factor (RF) for the carbon dioxide enhanced oil recovery (CO2-EOR) process involving the injection of CO2 into oil reservoirs. This chapter first provides some basic information on the RF, including its dependence on various reservoir and operational parameters, and then discusses the three development phases of oil recovery—primary, second­ary, and tertiary (EOR). It ends with a brief discussion of the three approaches for estimating recovery factors, which are detailed in subsequent chapters.

  1. Prognostic Factors in Hodgkin's Disease

    DEFF Research Database (Denmark)

    Specht

    1996-01-01

    regions and the tumor mass in each region are important, and an estimate of the total tumor burden has proved significant. B symptoms, histological subtype, age, and gender are also generally significant but less important. Prognostic factors for laparotomy findings in clinical stages I and II are: number...... of involved regions, disease confined to upper cervical nodes, B symptoms, gender, histology, age, and mediastinal disease (variable influence). In clinical stages I and II, the same prognostic factors apply as for pathological stages I and II and for laparotomy findings, and also some indirect indicators...

  2. Absorption factor for cylindrical samples

    International Nuclear Information System (INIS)

    Sears, V.F.

    1984-01-01

    The absorption factor for the scattering of X-rays or neutrons in cylindrical samples is calculated by numerical integration for the case in which the absorption coefficients of the incident and scattered beams are not equal. An extensive table of values having an absolute accuracy of 10 -4 is given in a companion report [Sears (1983). Atomic Energy of Canada Limited, Report No. AECL-8176]. In the present paper an asymptotic expression is derived for the absorption factor which can be used with an error of less than 10 -3 for most cases of interest in both neutron inelastic scattering and neutron diffraction in crystals. (Auth.)

  3. Risk factors and diabetic retinopathy

    Directory of Open Access Journals (Sweden)

    Vahid Jusufović

    2012-02-01

    Full Text Available The aim of the study was to determine the correlation between risk factors and diabetic retinopathy, which is the leading cause of blindness in developed countries for patients aged 20 to 65.We compared risk factors between patients without retinopathy, with non-proliferate and with proliferate retinopathy (p< 0.05. Duration of diabetes is most important for the development of retinopathy. Hyperglycaemia and high blood pressure are important for progression. Better control of blood sugar and elevated blood pressure can reduce progression of retinopathy and riskof vision loss.

  4. Social networks and factor markets

    DEFF Research Database (Denmark)

    Abay, Kibrom Araya; Kahsay, Goytom Abraha; Berhane, Guush

    2018-01-01

    We investigate the role of an indigenous social network in Ethiopia, the iddir, in facilitating factor market transactions among smallholder farmers. We use a detailed longitudinal household survey data and employ a fixed effects estimation to identify the effect of iddir membership on factor...... market transactions among farmers. We find that joining an iddir network improves households’ access to land, labour and credit transactions. Our findings also hint that iddir networks may crowd-out borrowing from local moneylenders (locally referred as ‘Arata Abedari’), a relatively expensive credit...... source. These results suggest that non-market institutions can play crucial roles in facilitating market transactions....

  5. Factores de risco em implantologia

    OpenAIRE

    Sousa, Inês Silveira e Luz Nunes de

    2015-01-01

    A Implantologia tem ganho popularidade na medicina dentária pelos resultados previsíveis em reabilitações de áreas edêntulas, permitindo minimizar as consequências funcionais, fonéticas e estéticas que advém da perda de dentes através de uma solução fixa que satizfaz os pacientes. Esta é uma revisão da literatura existente sobre factores de risco, fracassos e complicações inerentes ao tratamento com implantes dentários. Categorizam-se os factores de risco em implantologia co...

  6. $K_{13}$ transition form factors

    CERN Document Server

    Chueng Ryong Ji

    2001-01-01

    The rainbow truncation of the quark Dyson-Schwinger equation is combined with the ladder Bethe-Salpeter equation for the meson bound state amplitudes and the dressed quark-W vertex in a manifestly covariant calculation of the K/sub l3/ transition form factors and decay width in the impulse approximation. With model gluon parameters previously fixed by the chiral condensate, the pion mass and decay constant, and the kaon mass, our results for the K/sub l3/ form factors and the kaon semileptonic decay width are in good agreement with the experimental data. (37 refs).

  7. Age factors in biometric processing

    CERN Document Server

    Fairhurst, Michael

    2013-01-01

    As biometrics-based identification and identity authentication become increasingly widespread in their deployment, it becomes correspondingly important to consider more carefully issues relating to reliability, usability and inclusion. One factor which is particularly important in this context is that of the relationship between the nature of the measurements extracted from a particular biometric modality and the age of the sample donor, and the effect which age has on physiological and behavioural characteristics invoked in a biometric transaction. In Age Factors in Biometric Processing an in

  8. Prevalencia de hipotiroidismo y su asociación con factores de riesgo cardiometabólicos en mujeres adultas argentinas

    Directory of Open Access Journals (Sweden)

    Lorena Rosalía Belén

    2015-10-01

    Full Text Available Introducción: El hipotiroidismo se asocia con factores de riesgo cardiometabólicos (FRC además de la edad y del sexo femenino. El principal objetivo fue conocer la prevalencia de hipotiroidismo y su asociación con FRC en mujeres adultas concurrentes a un Centro de Endocrinología de la Ciudad Autónoma de Buenos Aires, Argentina.Material y Métodos: Diseño transversal y observacional en muestra no probabilística de 316 mujeres adultas (40 a 65 años, categorizadas en hipotiroideas controladas con tratamiento farmacológico y eutiroideas. Variables: Se estudiaron los siguientes FRC: Índice Masa Corporal (IMC, <25kg/m2 y ≥25,0Kg/m2; circunferencia cintura (CC ≤88cm y >88cm; etapa biológica (premenopausia y posmenopausia, tabaquismo, sedentarismo; perfil lipídico alterado (ColT>200mg/dl; LDL-c>130mg/dl; Tg>150mg/dl; HDL-c<40mg/dl; HTA≥120/80mmHg y glucemia basal aumentada >100mg/dl. Estadística con SPSS 15.0 estableciendo medidas de tendencia central, ANOVA y OR con intervalos de confianza 95% (IC y diferencia de proporciones con valor p<0,05.Resultados: 46,2% hipotiroideas controladas y 53,8% eutiroideas; 64,2% posmenopáusicas; 68% con sobrepeso u obesidad y 45,2% con CC aumentada. La edad fue similar en ambos grupos: 53,3 (DS=6,4 años hipotiroideas y 53,9 (DS=6,6 años eutiroideas. Sedentarismo fue el FRC más prevalente en ambos grupos. Las hipotiroideas presentaron más riesgo de IMC aumentado (OR=0,36 IC95%=0,21-0,59; p=0,0001 y CC alterada (OR=0,53 IC95%=0,34-0,84; p=0,006 que las eutiroideas.Conclusiones: La prevalencia de hipotiroidismo se presentó aproximadamente en la mitad de la muestra. El estado nutricional alterado fue el único FRC asociado significativamente con el hipotiroidismo.

  9. Número ideal de filhos como fator de risco para laqueadura tubária Ideal number of children as a risk factor for tubal ligation

    Directory of Open Access Journals (Sweden)

    Luiz Eduardo Campos de Carvalho

    2004-12-01

    Full Text Available O objetivo deste artigo é avaliar a associação entre o número ideal de filhos (NIF e a realização da laqueadura. Foi feito um estudo de caso-controle aninhado, com base em uma análise secundária de dados obtidos em um estudo de coorte sobre a saúde reprodutiva de mulheres em Campinas, São Paulo, Brasil, que teve como sujeitos 3.878 mulheres, das quais 1.012 eram laqueadas (casos. A relação entre NIF e o número de nascidos vivos (NV foi dividida em duas categorias (NIF > NV e NIF ¾ NV. Foram calculados os riscos relativos estimados (odds ratio para a realização de laqueadura e seus respectivos intervalos de confiança (IC 95% para a relação NIF/NV, estratificando-se para outras dez variáveis. Todas as variáveis preditoras foram incluídas em um modelo de regressão logística para identificar os fatores independentemente associados à esterilização definitiva. Observou-se que o risco de laqueadura foi maior entre as mulheres com NIF The purpose of this paper was to evaluate the association between ideal number of children (INC and female sterilization. A nested case-control study was performed through a secondary analysis of data from a cohort study on the reproductive health of women in Campinas, São Paulo, Brazil. A total of 3,878 women were included, 1,012 being sterilized (cases. The relationship between INC and number of live births (LB was divided in two categories (INC > LB and INC ¾ LB. The relative risks of performing tubal ligation were calculated (odds ratio with their respective 95% confidence intervals for the relation INC/LB and all control variables. All predictor variables were included in a logistic regression model in order to identify the factors independently associated with female sterilization. The results showed that the risks of tubal ligation were higher among women with INC < LB, higher age, with partners, higher family income, more than two previous pregnancies, more deliveries, fewer abortions

  10. Tissue factor-dependent activation of tritium-labeled factor IX and factor X in human plasma

    International Nuclear Information System (INIS)

    Morrison, S.A.; Jesty, J.

    1984-01-01

    A comparism was made of the tissue factor-dependent activation of tritium-labeled factor IX and factor X in a human plasma system and a study was made of the role of proteases known to stimulate factor VII activity. Plasma was defibrinated by heating and depleted of its factors IX and X by passing it through antibody columns. Addition of human brain thromboplastin, Ca2+, and purified 3H-labeled factor X to the plasma resulted, after a short lag, in burst-like activation of the factor X, measured as the release of radiolabeled activation peptide. The progress of activation was slowed by both heparin and a specific inhibitor of factor Xa but factor X activation could not be completely abolished by such inhibitors. In the case of 3H-factor IX activation, the rate also increased for approximately 3 min after addition of thromboplastin, but was not subsequently curtailed. A survey of proteases implicated as activators of factor VII in other settings showed that both factor Xa and factor IXa could accelerate the activation of factor IX. However, factor Xa was unique in obliterating activation when present at concentrations greater than approximately 1 nM. Heparin inhibited the tissue factor-dependent activation of factor IX almost completely, apparently through the effect of antithrombin on the feedback reactions of factors Xa and IXa on factor VII. These results suggest that a very tight, biphasic control of factor VII activity exists in human plasma, which is modulated mainly by factor Xa. At saturation of factor VIIa/tissue factor, factor IX activation was significantly more rapid than was previously found in bovine plasma under similar conditions. The activation of factor X at saturation was slightly more rapid than in bovine plasma, despite the presence of heparin

  11. Factors in Dubbing Television Comedy.

    Science.gov (United States)

    Zabalbeascoa, Patrick

    1994-01-01

    Advocates a greater awareness of the factors involved with dubbing television comedies. Considers the translation of jokes and provides an outline of the various kinds of jokes in television shows. Calls for more research on comedy dubbing and television translation in general. (HB)

  12. Five Describing Factors of Dyslexia

    Science.gov (United States)

    Tamboer, Peter; Vorst, Harrie C. M.; Oort, Frans J.

    2016-01-01

    Two subtypes of dyslexia (phonological, visual) have been under debate in various studies. However, the number of symptoms of dyslexia described in the literature exceeds the number of subtypes, and underlying relations remain unclear. We investigated underlying cognitive features of dyslexia with exploratory and confirmatory factor analyses. A…

  13. [Virulence factors of Candida albicans].

    Science.gov (United States)

    Staniszewska, Monika; Bondaryk, Małgorzata; Piłat, Joanna; Siennicka, Katarzyna; Magda, Urszula; Kurzatkowski, Wiesław

    2012-01-01

    Candida albicans is the most common etiological factor of opportunistic human fungal infections. In this review, we focus on the major virulence factors that mediate the pathogenesis of C. albicans. Among these virulence factors, secreted aspartyl proteases, adherence, pleomorphism are the most important features of C. albicans infections. Ability to exist as different pleomorphic forms is defined as pleomorphism. A number of quorum sensing (QS) molecules have been described which affect morphogenesis process in C. albicans. Furthermore, the morphological transition of C. albicans in response to changing environmental conditions represent a means by which the strain adapts to different biological niches. Furthermore, every morphotype has own virulence profile and each pleomorphic form provide critical functions required for pathogenesis. Candida albicans is a producer of extracellular hydrolytic enzymes. Among them lipases, phospholipases and secreted aspartyl proteinases (Sap) are most significant in virulence. Sap proteins contribute to pathogenesis by digestion of host cell membranes and molecules of the host immune system to avoid antimicrobial attack by the host. One of the key features in the development of candidiasis is adhesion ofC. albicans to buccal and vaginal epithelial cells. The adhesion to host cells represents the first step in the internalization process which involves adhesins. Knowledge of the role of the various C. albicans' virulence factors during in vivo infections is still incomplete, therefore further studies including quantification of genes expression and histopathological examination of tissues damage are required to fully understand pathogenesis of this opportunistic pathogen.

  14. Cardiovascular risk factors in men

    DEFF Research Database (Denmark)

    Gyllenborg, J; Rasmussen, S L; Borch-Johnsen, Knut

    2001-01-01

    Males have higher risk of cardiovascular disease (CVD) than premenopausal females. Gonadal steroids are probably involved in the gender difference in CVD, but previous results have been conflicting. We investigated the associations between CVD risk factors and sex hormones in a cross...

  15. Psychological Risk Factors in Headache

    Science.gov (United States)

    Nicholson, Robert A.; Houle, Timothy T.; Rhudy, Jamie L.; Norton, Peter J.

    2008-01-01

    Headache is a chronic disease that occurs with varying frequency and results in varying levels of disability. To date, the majority of research and clinical focus has been on the role of biological factors in headache and headache-related disability. However, reliance on a purely biomedical model of headache does not account for all aspects of headache and associated disability. Using a biopsychosocial framework, the current manuscript expands the view of what factors influence headache by considering the role psychological (i.e., cognitive and affective) factors have in the development, course, and consequences of headache. The manuscript initially reviews evidence showing that neural circuits responsible for cognitive–affective phenomena are highly interconnected with the circuitry responsible for headache pain. The manuscript then reviews the influence cognitions (locus of control and self-efficacy) and negative affect (depression, anxiety, and anger) have on the development of headache attacks, perception of headache pain, adherence to prescribed treatment, headache treatment outcome, and headache-related disability. The manuscript concludes with a discussion of the clinical implications of considering psychological factors when treating headache. PMID:17371358

  16. NAC transcription factors in senescence

    DEFF Research Database (Denmark)

    Podzimska-Sroka, Dagmara; O'Shea, Charlotte; Gregersen, Per L.

    2015-01-01

    Within the last decade, NAC transcription factors have been shown to play essential roles in senescence, which is the focus of this review. Transcriptome analyses associate approximately one third of Arabidopsis NAC genes and many crop NAC genes with senescence, thereby implicating NAC genes as i...

  17. Introduction to human factors engineering

    International Nuclear Information System (INIS)

    Derfuss, Ch.

    2010-01-01

    Some of the main aspects of human factors engineering are discussed. The following topics are considered: Integration into the design process; Identification and application of human-centered design requirements; Design of error-tolerant systems; Iterative process consisting of evaluations and feedback loops; Participation of operators/users; Utilization of an interdisciplinary design/ evaluation team; Documentation of the complete HFE-process: traceability

  18. Factors in Infectious Disease Emergence

    Indian Academy of Sciences (India)

    Factors: Societal events: Population growth and migration (movement from rural areas to cities); war or civil conflict; urban decay; sexual behavior; intravenous drug use; use of high-density facilities. Disease examples: Introduction of HIV; spread of dengue; spread of HIV and other sexually transmitted diseases.

  19. Transcription factor-based biosensor

    Science.gov (United States)

    Dietrich, Jeffrey A; Keasling, Jay D

    2013-10-08

    The present invention provides for a system comprising a BmoR transcription factor, a .sigma..sup.54-RNA polymerase, and a pBMO promoter operatively linked to a reporter gene, wherein the pBMO promoter is capable of expression of the reporter gene with an activated form of the BmoR and the .sigma..sup.54-RNA polymerase.

  20. The factorization method and supersymmetry

    International Nuclear Information System (INIS)

    Alves, N.A.; Drigo Filho, E.

    1988-01-01

    Applying the factorization method, we generalize the harmonic - oscillator and the Coulomb potentials, both in arbitrary dimensions. We also show that this method allows the determination of the superpotentials and the supersymmetric partners associated with each of those systems. (author) [pt

  1. Factors driving aquaculture technology adoption

    Science.gov (United States)

    Technology adoption has played a key role in the global development and increase in agricultural productivity. However, the decision to adopt a new technology on farms is complex. While the factors that drive the adoption of new technologies have been well studied in agriculture, less attention has ...

  2. Logistical Factors in Teachers' Motivation

    Science.gov (United States)

    Daniels, Erika

    2016-01-01

    Research in education and psychology contributes to an understanding of how educators create contexts for learning that encourage intrinsic motivation and increase academic achievement. In this article, the researcher investigated how teachers themselves define effectiveness and identified what factors influence their motivation, both positively…

  3. Cognitive Factors in Academic Achievement.

    Science.gov (United States)

    Cuasay, Peter

    1992-01-01

    This review explores the factors of cognitive processing, style, and metacognitive organization as they contribute to academic success. Specific discussions consider aspects of short- and long-term memory, including how these affect learning and academic performance, and the keys to attaining long-term memory capability by involving redundancy,…

  4. Detecting Risk Factor of Diseases

    Czech Academy of Sciences Publication Activity Database

    Zvárová, Jana

    1995-01-01

    Roč. 15, 1/2 (1995), s. 203-212 ISSN 0208-5216. [Seminar on Statistics and Clinical Practice. Warsaw, 20.06.1994-23.06.1994] Keywords : risk factors * genetics * association * epidemilogy * measures of association * screening * genetics

  5. HDG1 transcription factor targets

    NARCIS (Netherlands)

    Horstman, A.; Boutilier, K.A.; Sanchez Perez, Gabino

    2015-01-01

    The AIL transcription factor BABY BOOM (BBM) is required together with the related PLETHORA proteins for embryo and root meristem development and its expression is sufficient to confer pluripotency and totipotency to somatic tissues. We show that BBM and other AIL proteins interact with multiple

  6. Factors influencing bone scan quality

    International Nuclear Information System (INIS)

    Adams, F.G.; Shirley, A.W.

    1983-01-01

    A reliable subjective method of assessing bone scan quality is described. A large number of variables which theoretically could influence scan quality were submitted to regression and factor analysis. Obesity, age, sex and abnormality of scan were found to be significant but weak variables. (orig.)

  7. Landscape genetics and limiting factors

    Science.gov (United States)

    Samuel A. Cushman; Andrew J. Shirk; Erin L. Landguth

    2013-01-01

    Population connectivity is mediated by the movement of organisms or propagules through landscapes. However, little is known about how variation in the pattern of landscape mosaics affects the detectability of landscape genetic relationships. The goal of this paper is to explore the impacts of limiting factors on landscape genetic processes using simulation...

  8. Bioactive factors in human milk.

    Science.gov (United States)

    Hamosh, M

    2001-02-01

    This article reviews the bioactive components of human milk. Special emphasis is given to immune and nonimmune protective function of major and minor nutrients in human milk. Immune modulating components, such as cytokines, nucleotides, hormones, and growth factors, are discussed. Milk enzymes with digestive function in the newborn are reviewed.

  9. Field factors for asymmetric collimators

    International Nuclear Information System (INIS)

    Turner, J.R.; Butler, A.P.H.

    1996-01-01

    In recent years manufacturers have been supplying linear accelerators with either a single pair or a dual pair of collimators. The use of a model to relate off-axis field factors to on-axis field factors obviates the need for repeat measurements whenever the asymmetric collimators are employed. We have investigated the variation of collimator scatter Sc, with distance of the central ray x from the central axis for a variety of non square field sizes. Collimator scatter was measured by in-air measurements with a build-up cap. The Primaty-Off-Centre-Ratio (POCR) was measured in-air by scanning orthogonally across the beam with an ionization chamber. The result of the investigation is the useful prediction of off-axis field factors for a range of rectangular asymmetric fields using the simple product of the on-axis field factor and the POCR in air. The effect of asymmetry on the quality of the beam and hence the percent depth dose will be discussed. (author)

  10. Shot-noise Fano factor

    Czech Academy of Sciences Publication Activity Database

    Rajdl, K.; Lánský, Petr

    2015-01-01

    Roč. 92, č. 5 (2015), č. článku 052135. ISSN 2470-0045 Institutional support: RVO:67985823 Keywords : response function s * limit-theorems * spike trains * variability Subject RIV: BD - Theory of Information Impact factor: 2.252, year: 2015

  11. An innovation resistance factor model

    Directory of Open Access Journals (Sweden)

    Siti Salwa Mohd Ishak

    2016-09-01

    Full Text Available The process and implementation strategy of information technology in construction is generally considered through the limiting prism of theoretical contexts generated from innovation diffusion and acceptance. This research argues that more attention should be given to understanding the positive effects of resistance. The study develops a theoretical framing for the Integrated Resistance Factor Model (IRFM. The framing uses a combination of diffusion of innovation theory, technology acceptance model and social network perspective. The model is tested to identify the most significant resistance factors using Partial Least Square (PLS technique. All constructs proposed in the model are found to be significant, valid and consistent with the theoretical framework. IRFM is shown to be an effective and appropriate model of user resistance factors. The most critical factors to influence technology resistance in the online project information management system (OPIMS context are: support from leaders and peers, complexity of the technology, compatibility with key work practices; and pre-trial of the technology before it is actually deployed. The study provides a new model for further research in technology innovation specific to the construction industry.

  12. Seasonality of cardiovascular risk factors

    DEFF Research Database (Denmark)

    Marti-Soler, Helena; Gubelmann, Cédric; Aeschbacher, Stefanie

    2014-01-01

    OBJECTIVE: To assess the seasonality of cardiovascular risk factors (CVRF) in a large set of population-based studies. METHODS: Cross-sectional data from 24 population-based studies from 15 countries, with a total sample size of 237 979 subjects. CVRFs included Body Mass Index (BMI) and waist...

  13. Transforming Rubrics Using Factor Analysis

    Science.gov (United States)

    Baryla, Ed; Shelley, Gary; Trainor, William

    2012-01-01

    Student learning and program effectiveness is often assessed using rubrics. While much time and effort may go into their creation, it is equally important to assess how effective and efficient the rubrics actually are in terms of measuring competencies over a number of criteria. This study demonstrates the use of common factor analysis to identify…

  14. Factors Influencing Donor Partnership Effectiveness

    International Development Research Centre (IDRC) Digital Library (Canada)

    (UN Global Compact Office, 2007); and “an alliance between organizations from two or more ... programs related to the environment, global health, and ..... partnering process and the factors of influence, drawing on an example of a flagship initiative with a bilateral donor for an environment-focused program. As in most joint ...

  15. Decomposition using Maximum Autocorrelation Factors

    DEFF Research Database (Denmark)

    Larsen, Rasmus

    2002-01-01

    , normally we have an ordering of landmarks (variables) along the contour of the objects. For the case with observation ordering the maximum autocorrelation factor (MAF) transform was proposed for multivariate imagery in\\verb+~+\\$\\backslash\\$cite{switzer85}. This corresponds to a R-mode analyse of the data...

  16. Risk factors for undescended testis.

    NARCIS (Netherlands)

    Brouwers, M.M.; Bruijne, L.M. de; Gier, R.P.E. de; Zielhuis, G.A.; Feitz, W.F.J.; Roeleveld, N.

    2012-01-01

    OBJECTIVE: To contribute to the understanding of the etiology of undescended testis (UDT), by exploring a wide range of potential risk factors in a case-referent study. PATIENTS AND METHODS: Cases and referents were recruited at five hospitals and included 200 boys with surgically corrected UDT and

  17. Three phase power factor controller

    Science.gov (United States)

    Nola, F. J. (Inventor)

    1984-01-01

    A power control circuit for a three phase induction motor is described. Power factors for the three phases are summed to provide a control signal, and this control signal is particularly filtered and then employed to control the duty cycle of each phase of input power to the motor.

  18. Human factors in software development

    Energy Technology Data Exchange (ETDEWEB)

    Curtis, B.

    1986-01-01

    This book presents an overview of ergonomics/human factors in software development, recent research, and classic papers. Articles are drawn from the following areas of psychological research on programming: cognitive ergonomics, cognitive psychology, and psycholinguistics. Topics examined include: theoretical models of how programmers solve technical problems, the characteristics of programming languages, specification formats in behavioral research and psychological aspects of fault diagnosis.

  19. HUMAN PROSTATE CANCER RISK FACTORS

    Science.gov (United States)

    Prostate cancer has the highest prevalence of any non-skin cancer in the human body, with similar likelihood of neoplastic foci found within the prostates of men around the world regardless of diet, occupation, lifestyle, or other factors. Essentially all men with circulating an...

  20. EAMJ Factors Aug.indd

    African Journals Online (AJOL)

    2009-08-01

    Aug 1, 2009 ... those who are LTFU We studied factors associated with LTFU in a cohort of HIV sero- negative and sera-positive mothers in .... proportions, many studies have been instituted to learn more about the epidemiology ... Drop out due to lack of interest versus moving to a new geographical area: From a social ...

  1. Fatores prognósticos para o parto transvaginal em pacientes com cesárea anterior Prognostic factors for vaginal delivery after cesarian section

    Directory of Open Access Journals (Sweden)

    Luiz Carlos Santos

    1998-07-01

    Full Text Available O objetivo deste estudo foi determinar os fatores prognósticos para a ultimação do parto por via transpélvica em gestantes com cesárea anterior admitidas em trabalho de parto no CAM-IMIP. Foi realizado um estudo tipo caso-controle, analisando os partos de pacientes com cesárea prévia assistidos no CAM-IMIP no período de janeiro/1991 a dezembro/1994. Foram considerados casos as pacientes com cesárea anterior (n=156 e controles as que tiveram parto transvaginal (n=338. Os critérios de inclusão foram: idade gestacional > 36 semanas, cesárea anterior há pelo menos 1 ano, concepto vivo, trabalho de parto espontâneo e apresentação cefálica fletida. Foram excluídas as gestações de alto risco, os casos de sofrimento fetal anteparto e pacientes com história de parto transpélvico anterior depois da cesárea. A análise estatística foi realizada em Epi-Info 6.0 e Epi-Soft, utilizando-se os testes chi² de associação, teste exato de Fisher e "t" de Student, bem como a odds ratio e seu intervalo de confiança a 95%. Análise de regressão logística múltipla foi efetuada para controle das variáveis confundidoras. O percentual de cesáreas no grupo estudado foi de 31,6%. Os fatores maternos que apresentaram associação significativa com o parto transvaginal foram a idade materna 35 anos (OR = 0,54, IC a 95% = 0,36-0,82, a história de parto vaginal anterior (OR = 1,6, IC a 95% = 1,01-2,55 e a indicação da cesárea anterior por doenças da gestação (OR = 3,67, IC a 95% = 1,19-12,02. Fatores como intervalo entre a cesárea anterior e o parto atual, outras indicações de cesárea e o tipo de histerorrafia não apresentaram associação significativa com o parto transpélvico. No modelo de regressão logística múltipla, persistiram como variáveis associadas significativamente ao parto vaginal a idade materna e a história de parto vaginal anterior. Os autores concluíram que sendo a idade materna Objectives: to determine

  2. Extension Procedures for Confirmatory Factor Analysis

    Science.gov (United States)

    Nagy, Gabriel; Brunner, Martin; Lüdtke, Oliver; Greiff, Samuel

    2017-01-01

    We present factor extension procedures for confirmatory factor analysis that provide estimates of the relations of common and unique factors with external variables that do not undergo factor analysis. We present identification strategies that build upon restrictions of the pattern of correlations between unique factors and external variables. The…

  3. The risk factor of thyroid

    International Nuclear Information System (INIS)

    Kusama, Tomoko

    1979-01-01

    For the purposes of radiation protection, the noteworthy risk of thyroid is carcinogenesis. The risk factor which ICRP presented in the publication-26 is 5 x 10 - 6 rem - 1 . This numerical value is based upon the estimated likelihood of inducing fatal thyroid cancer. On the other hand, the risk factor presented by the BEIR report is 4 x 10 - 6 yr - 1 . This value was decided after consideration of the risks of both fatal and non-fatal cancer of thyroid. The following features distinguished thyroid cancer from malignancy of other tissue from medical point of view. 1) A large difference between incidence and mortality in case of thyroid cancer is recognized, because the thyroid cancer could be successfully treated by surgical or radiological treatment. 2) The high prevalence of clinically silent tumor in thyroid gland has been reported. The incidence of thyroid cancer, therefore, is very dependent on methods of medical inspection. The prevalence of radiation induced thyroid cancer is modified by various factors such as age, sex, latency, dose and dose rate. The latent period is very important factors such as ave, sex, latency, dose and dose rate. The latent period is a very important factor in the estimation of accumulated total risk of thyroid malignancy. What is included in the risk caused by thyroid irradiation must be investigated. The risk of non-fatal cancer should be considered in the same way as that of fatal cancer. The dose-equivalent limit of thyroid in non-uniform irradiation caused by radioactive iodine is decided by the limit for non-stochastic effects. Therefore the further consideration of non-stochastic effects of thyroid is necessary. (author)

  4. Estudio del factor de crecimiento del endotelio vascular (VEGF) y del factor de crecimiento fibroblástico básico (bFGF) en la patología benigna y maligna de la próstata.

    OpenAIRE

    Rodrigo Guanter, Vicente

    2005-01-01

    RESUMEN INTRODUCCION El PSA es el mejor marcador tumoral disponible y utilizado en la actualidad para el diagnóstico y seguimiento del tratamiento del cáncer de próstata. La discriminación entre la patología benigna y maligna de la próstata, en especial entre la hiperplasia benigna de próstata y el cáncer de próstata es crucial. Desafortunadamente, el PSA no siempre puede distinguir eficientemente entre enfermedad maligna y benigna de la próstata, especialmente en el intervalo de ...

  5. Qualidade do ambiente e fatores associados: um estudo em crianças de Pelotas, Rio Grande do Sul, Brasil Quality of the environment and associated factors: a pediatric study in Pelotas, Rio Grande do Sul, Brazil

    Directory of Open Access Journals (Sweden)

    Maria de Fátima Duarte Martins

    2004-06-01

    Full Text Available Descrever e identificar fatores que possam estar associados à qualidade do ambiente e características das crianças expostas, em Pelotas, Rio Grande do Sul, Brasil. Trata-se de um estudo prospectivo de caráter populacional, incluindo 630 crianças da coorte de nascimentos de 1993. No ano de 1998 avaliou-se, entre outras informações, a qualidade do ambiente, medida através do Home Observation for the Measurement of the Environment. Os dados foram analisados por meio de análise univariada. A associação entre as variáveis e o desfecho foi avaliada por meio das razões de prevalência, dos intervalos de confiança em 95% e do qui-quadrado. Realizou-se a regressão logística seguindo modelo hierarquizado. Constatou-se que 97 crianças (15% viviam em ambiente negativo. Encontraram-se oito fatores de risco associados à qualidade do ambiente: baixa renda familiar mensal, baixa escolaridade materna, sexo masculino, casas com mais de sete residentes, número de irmãos maior ou igual a quatro, uso de tabaco na gestação, crianças que dormem na cama dos pais aos 4 anos e mães com presença de transtornos psiquiátricos.This study aims to describe and identify factors associated with environmental quality and characteristics of children exposed to environmental risk factors in Pelotas, Rio Grande do Sul, Brazil. This was a prospective, population-based study, including 630 children from the 1993 birth cohort. During the year 1998, environmental quality and other information were assessed using the Home Observation for the Measurement of the Environment. Data were submitted to univariate analysis. The association between the variables and the outcome was evaluated through prevalence ratios, 95% confidence intervals, and chi-square. Logistic regression was performed according to a hierarchical model. Some 97 children (15% were living in negative environments. Eight risk factors were associated with environmental quality: low monthly family

  6. Prevalencia y factores asociados al VIH en habitante de calle de la ciudad de Medellín Colombia / Prevalence and factors associated with hiv among the street dwellers of Medellin, Colombia

    Directory of Open Access Journals (Sweden)

    Dedsy Berbesí

    2015-09-01

    Full Text Available RESUMEN Objetivo: determinar la prevalencia de VIH y explorar su relación con características sociales y demográficas de habitantes de calle de la ciudad de Medellín en el año 2014. Metodología: se realizó un estudio descriptivo-transversal para determinar la seroprevalencia de VIH y se exploraron factores sociales y demográficos asociados a la infección por VIH en habitantes de calle de la ciudad de Medellín en el año 2014. El procesamiento de datos fue realizado en el software SPSS 21.0. Los análisis incluyeron descripción univariada y bivariada, se utilizó la prueba estadística de Chi cuadrado; razón de prevalencia (RP intervalos de confianza del 95% asumiendo un nivel de significación estadística menor del 5%. Resultados: se encuestaron 184 habitantes de calle, el 80% eran hombres, con un promedio de edad de 40 (DE 11,4 años. Se identificó una prevalencia de VIH del 8,2%; para los hombres esta prevalencia fue de 6,1% y para las mujeres fue de 16,2%. Las mujeres tuvieron tres veces el riesgo de VIH comparado con los hombres y las personas casadas y en unión libre cinco veces el riesgo de tener VIH comparado con los solteros, separados y divorciados. Conclusión: la prevalencia mayor del 5% en la población habitante de calle, muestra que la infección por VIH en Colombia está concentrada en poblaciones clave (alta prevalencia y vulnerables y se requieren acciones focalizadas hacia grupos específicos. / ABSTRACT Objective: To determine the prevalence of HIV and describe the social and demographic characteristics of street dwellers Medellin in 2014. Methodology: A descriptive cross-sectional study where the authors determined the seroprevalence of HIV and explored the social and demographic factors associated with HIV infection among street dwellers of the city of Medellin in 2014. The data were processed using the SPSS 21.0 software. Analyses included univariate and bivariate descriptions, and the statistical Chi

  7. Factors related to dental health in 12-year-old children: a cross-sectional study in pupils Factors related to dental health in 12-year-old children: a cross-sectional study in pupils

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    Ernesto Smyth

    2005-04-01

    Full Text Available Objective: The aim of this study was to identify factors related to the prevalence of caries in 12-year-old schoolchildren. Methods: A cross-sectional study was carried out using a representative sample (n = 1217 of the population of 12-year-old schoolchildren in Galiza (northwest Spain. Independent variables were measured through a questionnaire, and dependent variables were determined through oral examination. Multiple and logistic regression were applied. Results: The decayed, missing and filled permanent teeth/decayed, filled primary teeth (DMFT-dft value in the sample was 1.83 (95% confidence interval [CI], 1.67-1.98, the DMFT value was 1.53 (95% CI, 1.37-1.67, and the prevalence of caries was 61% (95% CI, 57.7-64.5. The prevalence of caries was directly related to a low frequency of brushing, greater use of toothpaste, and a higher consumption of sweets. The prevalence of caries was higher in rural than in urban areas. In contrast, the higher the mother's level of education and the greater the subject's knowledge of dental health, the lower the prevalence of caries. Conclusions: The main goals of dental health programmes should be to achieve quality brushing every day in children, to reduce the consumption of sweets, and to increase knowledge of dental health.Objetivo: Identificar los factores asociados a la prevalencia de caries en escolares de 12 años. Métodos: Estudio transversal sobre una muestra (n = 1.217 de escolares de 12 años de Galicia. Las variables independientes se midieron mediante un cuestionario y las dependientes, a través de exploración bucal. En el análisis estadístico se aplicaron regresión logística y regresión lineal múltiple. Resultados: El índice CAO-co en la muestra fue 1,83 (intervalo de confianza [IC] del 95%, 1,67-1,98, el índice CAO 1,53 (IC del 95%, 1,37-1,67, mientras que la prevalencia de caries se situó en el 61% (IC del 95%, 57,7-64,5. La prevalencia de caries estuvo directamente asociada a

  8. Eigenstates of coupling factor and loss factor of piezoelectric ceramics

    International Nuclear Information System (INIS)

    Smits, J.G.

    1978-01-01

    A short history of piezoelectricity is given and its occurence in nature described. The physical background of piezoelectric loss is discussed together with how material coefficients like susceptibilities can be used to describe the relation between canonical variables and to determine the dissipation of energy. The piezoelectric coupling factor, the applications of the eigencoupling state, elastic and piezoelectric digenstates are dealt with. The composition of the measurement system is described and experimental values of ceramics given. (C.F.)

  9. Activated human neutrophils release hepatocyte growth factor/scatter factor.

    LENUS (Irish Health Repository)

    McCourt, M

    2012-02-03

    BACKGROUND: Hepatocyte growth factor or scatter factor (HGF\\/SF) is a pleiotropic cytokine that has potent angiogenic properties. We have previously demonstrated that neutrophils (PMN) are directly angiogenic by releasing vascular endothelial growth factor (VEGF). We hypothesized that the acute inflammatory response can stimulate PMN to release HGF. AIMS: To examine the effects of inflammatory mediators on PMN HGF release and the effect of recombinant human HGF (rhHGF) on PMN adhesion receptor expression and PMN VEGF release. METHODS: In the first experiment, PMN were isolated from healthy volunteers and stimulated with tumour necrosis factor-alpha (TNF-alpha), lipopolysaccharide (LPS), interleukin-8 (IL-8), and formyl methionyl-leucyl-phenylalanine (fMLP). Culture supernatants were assayed for HGF using ELISA. In the second experiment, PMN were lysed to measure total HGF release and HGF expression in the PMN was detected by Western immunoblotting. Finally, PMN were stimulated with rhHGF. PMN CD 11a, CD 11b, and CD 18 receptor expression and VEGF release was measured using flow cytometry and ELISA respectively. RESULTS: TNF-alpha, LPS and fMLP stimulation resulted in significantly increased release of PMN HGF (755+\\/-216, 484+\\/-221 and 565+\\/-278 pg\\/ml, respectively) compared to controls (118+\\/-42 pg\\/ml). IL-8 had no effect. Total HGF release following cell lysis and Western blot suggests that HGF is released from intracellular stores. Recombinant human HGF did not alter PMN adhesion receptor expression and had no effect on PMN VEGF release. CONCLUSIONS: This study demonstrates that pro-inflammatory mediators can stimulate HGF release from a PMN intracellular store and that activated PMN in addition to secreting VEGF have further angiogenic potential by releasing HGF.

  10. Food Ingestion Factors of the Korean Exposure Factors Handbook

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    Jae-Yeon Jang

    2014-01-01

    Full Text Available The purpose of this study was to establish food ingestion factors needed to assess exposure to contaminants through food ingestion. The study reclassified the raw data of the Korean National Health and Nutrition Examination Survey in 2001 into 12 subcategories including grain products, meat products, fish and shellfish, and vegetables for international comparability of exposure evaluation. The criteria for food intake calculation were unified according to the characteristics of food groups, and recommended values for food ingestion factors were calculated through moisture correction and recategorization of cooked, processed, and mixed foods for each group. The average intake rate for grain and grain products was 6.25 g/kg-d per capita and the men's intake rate was approximately 8% higher than that of the women. The average intake rate of meat and meat products was 1.62 g/kg-d per capita and the men's intake rate was 30% higher than that of the women, on average. The average intake rate of fish and shellfish was 1.53 g/kg-d per capita, and the age groups of 1 to 2 and 3 to 6 recorded higher capita intake rates than other age groups, 2.62 g/kg-d and 2.25 g/kg-d, respectively. The average intake rate of vegetables was 6.47 g/kg-d per capita, with the age group of 1 to 2 recording the highest per capita intake rate of 9.79 g/kg-d and that of 13 to 19 recording the lowest mean. The study also offers recommended values for food ingestion factors of other food groups by gender, age, and region. The food ingestion exposure factors will need future updates in consideration of ongoing changes in food consumption behavior.

  11. Food ingestion factors of the Korean exposure factors handbook.

    Science.gov (United States)

    Jang, Jae-Yeon; Jo, Soo-Nam; Kim, Sun-Ja; Myung, Hyung-Nam; Kim, Cho-Il

    2014-01-01

    The purpose of this study was to establish food ingestion factors needed to assess exposure to contaminants through food ingestion. The study reclassified the raw data of the Korean National Health and Nutrition Examination Survey in 2001 into 12 subcategories including grain products, meat products, fish and shellfish, and vegetables for international comparability of exposure evaluation. The criteria for food intake calculation were unified according to the characteristics of food groups, and recommended values for food ingestion factors were calculated through moisture correction and recategorization of cooked, processed, and mixed foods for each group. The average intake rate for grain and grain products was 6.25 g/kg-d per capita and the men's intake rate was approximately 8% higher than that of the women. The average intake rate of meat and meat products was 1.62 g/kg-d per capita and the men's intake rate was 30% higher than that of the women, on average. The average intake rate of fish and shellfish was 1.53 g/kg-d per capita, and the age groups of 1 to 2 and 3 to 6 recorded higher capita intake rates than other age groups, 2.62 g/kg-d and 2.25 g/kg-d, respectively. The average intake rate of vegetables was 6.47 g/kg-d per capita, with the age group of 1 to 2 recording the highest per capita intake rate of 9.79 g/kg-d and that of 13 to 19 recording the lowest mean. The study also offers recommended values for food ingestion factors of other food groups by gender, age, and region. The food ingestion exposure factors will need future updates in consideration of ongoing changes in food consumption behavior.

  12. Factores socioacadémicos, estilo de aprendizaje, nivel intelectual y su relación con el rendimiento académico previo de médicos internos de pregrado Socioacademic factors, style of learning, intellectual level and their relationship with the previous academic yield of medical students

    Directory of Open Access Journals (Sweden)

    J.L. Padierna-Luna

    2009-06-01

    Full Text Available Introducción. El aprendizaje es una actividad compleja, en la que intervienen factores individuales, sociales-culturales y académicos. Objetivo. Describir factores socioacadémicos, estilos de aprendizaje, nivel intelectual y su relación con el rendimiento académico previo (promedio de los médicos internos de pregrado (MIP. Sujetos y métodos. Se realizó una encuesta transversal analítica a MIP aplicando tres cuestionarios: datos socioacadémicos, cuestionario CHAEA (estilos de aprendizaje y test de Raven para adultos (nivel intelectual. La muestra incluyó 174 alumnos procedentes de nueve universidades, tres privadas (n = 43; 24,7% y seis públicas (n = 131; 75,29%. Se utilizó estadística descriptiva y regresión múltiple para establecer asociaciones entre variables. Resultados y conclusiones. Predominó el género femenino, con el 59,2% (n = 103, frente al masculino, con el 40,8% (n = 71. El promedio de edad fue de 23,63 años, con un rango de 21 a 33. No hubo diferencias significativas de género en el rendimiento previo (8,21 frente a 8,25. Se midió la relación entre los factores socioacadémicos, estilos de aprendizaje y nivel intelectual con el rendimiento académico, con un intervalo de confianza del 95%. De los datos socioacadémicos, sólo la edad se relaciona inversamente con el rendimiento, con r = 0,2 y p Introduction. The learning is a complex activity, in that takes part individual factors, social and academic factors, among others. Aim. To describe socioacademic factors, styles of learning (SL, intellectual level (IL and its relation with previous academic yield (academic average of the Pre-degree interns (PDI. Subjects and methods. A cross-sectional and analytic survey to PDI was applied with three questionnaires: socioacademic data, adult questionnaire CHAEA (SL and test Raven (IL. The sample included 174 students coming from nine universities, three private (n = 43; 24.7% and six public (n = 131; 75.29%. It was used

  13. Pion transition form factor in k{sub T} factorization

    Energy Technology Data Exchange (ETDEWEB)

    Li, Hsiang-nan [Academica Sinica, Taipei, Taiwan (China). Inst. of Physics; Tsing-Hua Univ., Hsinchu, Taiwan (China). Dept. of Phyiscs; National Cheng-Kung Univ., Tainan, Taiwan (China). Dept. of Physics; National Cheng-Chi Univ, Taipei, Taiwan (China). Inst. of Applied Physics; Mishima, Satoshi [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

    2009-07-15

    It has been pointed out that the recent BaBar data on the {pi}{gamma}{sup *} {yields} {gamma} transition form factor F{sub {pi}}{sub {gamma}}(Q{sup 2}) at low (high) momentum transfer squared Q{sup 2} indicate an asymptotic (flat) pion distribution amplitude. These seemingly contradictory observations can be reconciled in the k{sub T} factorization theorem: the increase of the measured Q{sup 2}FF{sub {pi}}{sub {gamma}}(Q{sup 2}) for Q{sup 2} > 10 GeV{sup 2} is explained by convoluting a k{sub T} dependent hard kernel with a flat pion distribution amplitude, k{sub T} being a parton transverse momentum. The low Q{sup 2} data are accommodated by including the resummation of {alpha}{sub s} ln{sup 2}x, x being a parton momentum fraction, which provides a stronger suppression at the endpoints of x. The next-to-leading-order correction to the pion transition form factor is found to be less than 20% in the considered range of Q{sup 2}. (orig.)

  14. Factores predictores del inicio y consolidación del consumo de tabaco en adolescentes Analysis of factors related to smoking initiation and continued smoking in young adolescents

    Directory of Open Access Journals (Sweden)

    Araceli Caballero-Hidalgo

    2005-12-01

    Full Text Available Objetivo: Analizar los factores que determinan la adquisición y posterior consolidación del consumo de tabaco en los jóvenes adolescentes. Material y método: Estudio longitudinal de 3 años de duración (2000-2002 sobre jóvenes estudiantes de enseñanza obligatoria, con una edad al inicio del estudio de 13-14 años. Los datos fueron recogidos mediante encuesta individual, cuyo ámbito de estudio era la isla de Gran Canaria, con una muestra final de 745 individuos. Se estimaron modelos de elección binaria condicional de efectos fijos para datos longitudinales, para determinar la probabilidad de probar por primera vez el tabaco («modelo de inicio», así como sobre la probabilidad de ser fumador ocasional o habitual («modelo de experimentación». Resultados: En el último año, el 57% de los adolescentes encuestados ha tenido contacto con el tabaco alguna vez, un 25% más que en el primer año, algunos de ellos (el 9% de forma diaria. En el «modelo de inicio» los determinantes del consumo de tabaco son el interés por el colegio (odds ratio [OR] = 0,27; intervalo de confianza [IC] del 95%, 0,08-0,87, y OR = 0,14; IC del 95%, 0,03-0,58 para los que manifestaron bastante y mucho interés por el colegio, respectivamente, el consumo de tabaco por parte del mejor amigo (OR = 7,44; IC del 95%, 2,59-21,4, el consumo de alcohol (OR = 11,82; IC del 95%, 4,96-28,2, y OR = 15,42; IC del 95%, 4,68-50,7 para los que beben alcohol de manera ocasional o frecuente, respectivamente, y el dinero disponible (euros semanales (OR = 1,13; IC del 95%, 1,07-1,19. Para el «modelo de experimentación», el consumo de tabaco por parte del mejor amigo (OR = 7,01; IC del 95%, 2,96-16,5, el consumo de alcohol (OR = 5,71; IC del 95%, 1,98-16,4, y OR = 5,22; IC del 95%, 1,56-17,5 para los que beben alcohol de manera ocasional o frecuente, respectivamente y los años que lleva como fumador (OR = 1,44; IC del 95%, 1,11-1,86. Conclusiones: El estudio destaca

  15. Factors associated with vaginal birth after previous cesarean section in Brazilian women Factores relacionados con el parto vaginal en mujeres brasileñas con cesárea anterior

    Directory of Open Access Journals (Sweden)

    José Guilherme Cecatti

    2005-08-01

    que tuvieron su primer hijo en 1985 en la ciudad de Campinas, São Paulo, Brasil, y que fueron entrevistadas 10 años más tarde, en 1995. La población estudiada se compuso de 1 352 mujeres cuyo primer hijo había nacido por cesárea y que también habían tenido como mínimo un parto posterior. El grupo de los casos (150 mujeres, o alrededor de 11% de la muestra estuvo integrado por mujeres que tuvieron su segundo parto por la vía vaginal, y el grupo testigo se compuso de 1 202 mujeres que tuvieron su segundo parto por cesárea. Para cada uno de los posibles factores asociados se calcularon la razón de posibilidades y el intervalo de confianza de 95%. Se aplicó la prueba de tendencias de ji al cuadrado para analizar las variables categóricas. Se usó una regresión multifactorial incondicionada para estimar las razones de posibilidades ajustadas correspondientes a cada factor asociado. RESULTADOS: Los factores que mostraron una asociación estadísticamente significativa con el parto vaginal fueron un ingreso familiar mensual menor de cinco veces el salario mínimo mensual en el Brasil; depender del sistema nacional de salud brasileño para obtener atención sanitaria; poca edad materna; y una primera cesárea efectuada por presentación de nalgas o transversal, o por embarazo gemelar. Del grupo de mujeres que también tuvieron un segundo parto por cesárea, solamente 11% habían hecho un esfuerzo por tener un parto vaginal. CONCLUSIONES: El principal factor que determina el parto vaginal en mujeres que ya habían tenido una cesárea fue la presencia de factores sociales y económicos adversos.

  16. Growth factors: first part Factores de crecimiento I

    Directory of Open Access Journals (Sweden)

    Hilda Norha Jaramillo Londoño

    1996-02-01

    Full Text Available

    Los factores de crecimiento tienen como función activar o inhibir la transcripción génica; es así como la cascada enzimática que se inicia con la activación de los receptores de la membrana citoplasmática, ya sean de tipo segundo mensajero o catalíticos, tiene como efecto final la fosforilación de proteínas, las cuales pueden ser: 1 enzimas que intervienen en las vías metabólicas; 2 proteínas promotoras de la transcripción de genes o, por el contrario, represoras de los mismos (31,32; en algunos casos el efecto final consiste en la transcripción de protooncogenes (33 cuyos productos pueden ser otro factor de crecimiento o receptores para éstos (16; 3 algunos factores de crecimiento ejercen sus efectos sobre los eventos postranscripcionales y postraslacionales (23.

    Los Factores de Crecimiento, incluyendo las citoquinas, representan un número muy grande de polipéptidos, glucoproteínas y otras moléculas relacionadas. Todos ellos promueven la proliferación, la diferenciación y las funciones especializadas de casi cualquier tipo de célula. Juegan un papel importante mediando los modos paracrino, autocrino y endocrino de comunicación. En esta primera parte de una serie se definen y clasifican los factores de crecimiento; para la clasificación se proponen diversos sistemas basados en el período de desarrollo del individuo en que actúan, en el punto crítico del ciclo celular sobre el que ejercen su acción y en los efectos fisiológicos que producen; se discuten, además, someramente, la composición química, los mecanismos de acción y las funciones de estas sustancias.

  17. Enfermedad periodontal: ¿es factor de riesgo para parto pretérmino, bajo peso al nacer o preeclampsia?

    Directory of Open Access Journals (Sweden)

    José Luis Castaldi

    2006-04-01

    Full Text Available OBJETIVOS: Evaluar si la enfermedad periodontal (EP constituye un factor de riesgo de parto pretérmino, bajo peso al nacer o preeclampsia y si hay alguna relación entre las formas clínicas de la EP y los resultados obstétricos mencionados. MÉTODOS: Estudio analítico, transversal y prospectivo de todas las mujeres que tuvieron su parto en el Hospital Dr. José Penna, de la ciudad de Bahía Blanca, Argentina, entre el 1.º de febrero y el 18 de julio de 2003 y entre el 1.º de marzo y el 31 de mayo de 2004. A las mujeres que cumplieron los criterios de inclusión (ser mayor de 18 años, tener al menos 18 dientes, no ser diabética y que los hijos hubieran sobrevivido al parto se les practicó un examen odontológico en busca de hemorragia al sondaje, movilidad dentaria o inflamación gingival y se realizaron mediciones clínicas de la pérdida de inserción. Se calcularon las razones de posibilidades (odds ratios, RP con sus intervalos de confianza del 95% (IC95% y se ajustaron los resultados por las variables "ser fumadora" y "tener anemia". RESULTADOS: Se registraron 2 003 nacimientos, correspondientes a 1 982 partos. Se excluyeron 420 (21,2% mujeres por no cumplir los criterios de inclusión o por no poder realizárseles el diagnóstico odontológico previsto. De las 1 562 mujeres evaluadas, 809 (51,8% presentaban alguna de las afecciones buscadas; de ellas, 274 (17,5% padecían EP grave y 535 (34,3% tenían gingivitis. En total, 149 (9,5% partos fueron pretérmino, en 161 (10,3% nacieron niños con bajo peso y en 157 (10,0% se presentaron casos de preeclampsia. No se observó asociación alguna entre la EP y el parto pretérmino (RP = 1,06; IC95%: 0,74 a 1,50, el bajo peso al nacer (RP = 1,05; IC95%: 0,74 a 1,47 y la preeclampsia (RP = 0,99; IC95%: 0,70 a 1,40. El riesgo de dar a luz un niño con bajo peso al nacer en el subgrupo de fumadoras de más de 10 cigarrillos diarios fue mayor en las que tenían enfermedad periodontal grave que

  18. Genetics Home Reference: factor V Leiden thrombophilia

    Science.gov (United States)

    ... Twitter Home Health Conditions Factor V Leiden thrombophilia Factor V Leiden thrombophilia Printable PDF Open All Close All Enable Javascript to view the expand/collapse boxes. Description Factor V Leiden thrombophilia is an inherited disorder of blood clotting . ...

  19. Noncompliance with drug therapy of glaucoma: a review about intervening factors

    Directory of Open Access Journals (Sweden)

    Aldemar Nemésio Brandão Vilela de Castro

    2009-09-01

    better evaluation of these 12 raised factors.O glaucoma é definido como uma neuropatia óptica, caracterizada por perda de campo visual e lesão do nervo óptico, sendo considerado como a segunda causa de cegueira no mundo, podendo ser evitada pelo uso de colírios antiglaucomatosos. A falta de adesão ao tratamento medicamentoso pode culminar com perda da visão. O objetivo do trabalho foi revisar dados da literatura a respeito de possíveis fatores intervenientes para a não adesão à terapêutica medicamentosa e relatar taxas de não adesão estimadas. Foi realizada uma revisão sistematizada sobre o assunto, abrangendo o período de janeiro a junho de 2006. Foram pesquisados artigos em dois bancos de dados, o da National Library of Medicine (PUBMED e o de Literatura Latino Americana e do Caribe em Ciências da Saúde (LILACS, utilizando-se as seguintes palavras-chave: glaucoma, adesão do paciente, não adesão do paciente, tratamento e colírios. Foram levantados 199 artigos no PUBMED, nas línguas inglesa e francesa. Não foram encontrados artigos no LILACS. A partir dos critérios de inclusão e exclusão, foram selecionados 27 artigos, sendo 25 originais e duas revisões. Foram averiguados 12 possíveis fatores intervenientes para não adesão, bem como estimativas de taxas de não cooperação ao tratamento. As taxas de não adesão variaram de 4,6% a 59%. Dois fatores, 'esquecimento' e 'intervalo inadequado entre as doses', foram associados ao não-cumprimento da terapêutica medicamentosa. Raça, custo do tratamento, efeitos adversos, número de doses instiladas, doenças coexistentes e número de colírios utilizados tiveram resultados contraditórios, não podendo afirmar-se que os mesmos contribuíram para a não adesão. Idade, sexo, nível de escolaridade e perda de campo visual não foram associados à não adesão. Os pacientes glaucomatosos tenderam a descumprir o tratamento medicamentoso. A ampla variação nas taxas de não adesão pode ter sido

  20. Borderline Personality Disorder: Therapeutic Factors.

    Science.gov (United States)

    Stone, Michael H

    2016-01-01

    Proponents of the now half-dozen major psychotherapeutic approaches tend to claim the superiority of their different approaches-known widely by their acronyms: CBT for Cognitive Behavioral Therapy, DBT for Dialectic Behavioral Therapy, MBT for Mentalization-Based Therapy, TFP for Transference- Focused Psychotherapy, and so on. The data thus far support the utility of each method, but do not show clear-cut superiority of any one method. A large percentage of BPD patients eventually improve or even recover, but these favorable results appear to derive from a multiplicity of factors. These include the personality traits of both patient and therapist, the unpredictable life events over time, the socioeconomic and cultural background of the patient, and the placebo effect of simply being in treatment. These latter factors constitute the contextual model, which operates alongside the medical model, each playing a role in eventual outcome. The contextual model will be discussed extensively in a separate article.

  1. Human Factors and Medical Devices

    International Nuclear Information System (INIS)

    Dick Sawyer

    1998-01-01

    Medical device hardware- and software-driven user interfaces should be designed to minimize the likelihood of use-related errors and their consequences. The role of design-induced errors in medical device incidents is attracting widespread attention. The U.S. Food and Drug Administration (FDA) is fully cognizant that human factors engineering is critical to the design of safe medical devices, and user interface design is receiving substantial attention by the agency. Companies are paying more attention to the impact of device design, including user instructions, upon the performance of those health professionals and lay users who operate medical devices. Concurrently, the FDA is monitoring human factors issues in its site inspections, premarket device approvals, and postmarket incident evaluations. Overall, the outlook for improved designs and safer device operation is bright

  2. Significance evaluation in factor graphs

    DEFF Research Database (Denmark)

    Madsen, Tobias; Hobolth, Asger; Jensen, Jens Ledet

    2017-01-01

    in genomics and the multiple-testing issues accompanying them, accurate significance evaluation is of great importance. We here address the problem of evaluating statistical significance of observations from factor graph models. Results Two novel numerical approximations for evaluation of statistical...... significance are presented. First a method using importance sampling. Second a saddlepoint approximation based method. We develop algorithms to efficiently compute the approximations and compare them to naive sampling and the normal approximation. The individual merits of the methods are analysed both from....... Conclusions The applicability of saddlepoint approximation and importance sampling is demonstrated on known models in the factor graph framework. Using the two methods we can substantially improve computational cost without compromising accuracy. This contribution allows analyses of large datasets...

  3. Strange mesonic transition form factor

    International Nuclear Information System (INIS)

    Goity, J.L.; Musolf, M.J.

    1996-01-01

    The strange-quark vector current ρ-to-π meson transition form factor is computed at one-loop order using strange meson intermediate states. A comparison is made with a φ-meson dominance model estimate. We find that one-loop contributions are comparable in magnitude to those predicted by φ-meson dominance. It is possible that the one-loop contribution can make the matrix element as large as those of the electromagnetic current mediating vector meson radiative decays. However, due to the quadratic dependence of the one-loop results on the hadronic form factor cutoff mass, a large uncertainty in the estimate of the loops is unavoidable. These results indicate that non-nucleonic strange quarks could contribute appreciable in moderate-parallel Q 2 parallel parity-violating electron-nucleus scattering measurements aimed at probing the strange-quark content of the nucleon. copyright 1996 The American Physical Society

  4. Campylobacter virulence and survival factors.

    Science.gov (United States)

    Bolton, Declan J

    2015-06-01

    Despite over 30 years of research, campylobacteriosis is the most prevalent foodborne bacterial infection in many countries including in the European Union and the United States of America. However, relatively little is known about the virulence factors in Campylobacter or how an apparently fragile organism can survive in the food chain, often with enhanced pathogenicity. This review collates information on the virulence and survival determinants including motility, chemotaxis, adhesion, invasion, multidrug resistance, bile resistance and stress response factors. It discusses their function in transition through the food processing environment and human infection. In doing so it provides a fundamental understanding of Campylobacter, critical for improved diagnosis, surveillance and control. Copyright © 2014 Elsevier Ltd. All rights reserved.

  5. Prevalência de sobrepeso e obesidade e fatores associados em escolares de área urbana de Chilpancingo, Guerrero, México, 2004 Prevalence of overweight and obesity, and associated factors in school children from urban area in Chilpancingo, Guerrero, Mexico, 2004

    Directory of Open Access Journals (Sweden)

    Suzana Alves de Moraes

    2006-06-01

    Full Text Available Investigou-se a prevalência de sobrepeso e obesidade e respectivos fatores associados em escolares mexicanos. O estudo teve delineamento transversal e amostra composta por 700 escolares. As prevalências de sobrepeso e obesidade foram calculadas segundo sexo e idade, e as medidas de associação (odds ratios estimadas por pontos e por intervalos, utilizando-se a regressão logística multivariada. Para o conjunto de escolares, as prevalências de sobrepeso e obesidade foram 28,1% e 13,7%, respectivamente. Os fatores de risco para o sobrepeso foram: "número de anos de escolaridade da mãe"; "hábito de comer enquanto estuda ou assiste à TV"; "escores de freqüência de consumo de alimentos de risco > 12 pontos"; "atividades sedentárias > 1,6 horas/dia" e "peso ao nascer > 2.890 gramas". Os fatores de risco para a obesidade foram semelhantes àqueles detectados para o sobrepeso. Maior freqüência de atividades esportivas foi identificada como fator de proteção para ambos os desfechos. A detecção dos principais fatores associados ao sobrepeso e à obesidade indica o direcionamento de intervenções para a prevenção de doenças crônicas nessa população, cujos fatores de risco já podem ser identificados a partir da infância.This study aimed to investigate the prevalence rates for overweight and obesity among Mexican schoolchildren, identifying factors associated with the outcomes. A cross-sectional study was conducted in a sample consisting of 700 schoolchildren. Prevalence rates were calculated according to age and gender, and odds ratios were estimated by point and intervals, using multivariate logistic regression. Overweight and obesity prevalence were 28.1% and 13.7%, respectively. Risk factors for overweight were: mother's schooling (in years; eating while studying or watching TV; scores for risk food items > 12 points; sedentary activities > 1.6 hours/day, and birth weight > 2,890 grams. Obesity risk factors were similar to

  6. Human Factors in Space Exploration

    Science.gov (United States)

    Jones, Patricia M.; Fiedler, Edna

    2010-01-01

    The exploration of space is one of the most fascinating domains to study from a human factors perspective. Like other complex work domains such as aviation (Pritchett and Kim, 2008), air traffic management (Durso and Manning, 2008), health care (Morrow, North, and Wickens, 2006), homeland security (Cooke and Winner, 2008), and vehicle control (Lee, 2006), space exploration is a large-scale sociotechnical work domain characterized by complexity, dynamism, uncertainty, and risk in real-time operational contexts (Perrow, 1999; Woods et ai, 1994). Nearly the entire gamut of human factors issues - for example, human-automation interaction (Sheridan and Parasuraman, 2006), telerobotics, display and control design (Smith, Bennett, and Stone, 2006), usability, anthropometry (Chaffin, 2008), biomechanics (Marras and Radwin, 2006), safety engineering, emergency operations, maintenance human factors, situation awareness (Tenney and Pew, 2006), crew resource management (Salas et aI., 2006), methods for cognitive work analysis (Bisantz and Roth, 2008) and the like -- are applicable to astronauts, mission control, operational medicine, Space Shuttle manufacturing and assembly operations, and space suit designers as they are in other work domains (e.g., Bloomberg, 2003; Bos et al, 2006; Brooks and Ince, 1992; Casler and Cook, 1999; Jones, 1994; McCurdy et ai, 2006; Neerincx et aI., 2006; Olofinboba and Dorneich, 2005; Patterson, Watts-Perotti and Woods, 1999; Patterson and Woods, 2001; Seagull et ai, 2007; Sierhuis, Clancey and Sims, 2002). The human exploration of space also has unique challenges of particular interest to human factors research and practice. This chapter provides an overview of those issues and reports on sorne of the latest research results as well as the latest challenges still facing the field.

  7. Congenital deficiency of factor VII.

    Science.gov (United States)

    Sikka, M; Gomber, S; Madan, N; Rusia, U; Sharma, S

    1996-01-01

    A case of congenital factor VII deficiency in a five-year-old child is reported. The patient, born of a non-consanguineous marriage, presented with repeated bouts of epistaxis since childhood. The prothrombin time (PT) was markedly prolonged with a normal bleeding time (BT), partial thromboplastin time with Kaolin (PTTK) and platelet count. The patient has been on follow up for the last four years and is doing apparently well.

  8. Factoría Eternit

    Directory of Open Access Journals (Sweden)

    Waltenspuhl, Paul

    1959-10-01

    Full Text Available A pesar de las sucesivas ampliaciones que ha venido realizando la firma comercial de productos de amianto-cemento Eternit en su factoría de Niederurnen, y como consecuencia del natural aumento de su producción, había llegado un momento en que sus instalaciones resultaron insuficientes para poder atender las demandas de sus usuarios, seis veces superiores a las del año 1939.

  9. HIV: Social and Environmental Factors

    Centers for Disease Control (CDC) Podcasts

    2012-02-01

    Dr. Kevin Fenton, Director of CDC’s National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, discusses how social and environmental factors may put African Americans at greater risk for HIV.  Created: 2/1/2012 by National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention (NCHHSTP).   Date Released: 2/1/2012.

  10. Islamic factor in contemporary Russia

    OpenAIRE

    N. M. Shalenna

    2014-01-01

    Russian Federation, a Eurasian multinational state, has a significant number of indigenous Muslim population (about 10%) that continues to increase not only due to natural growth and conversion of non-Muslims to Islam, but also as a result of intensive immigration from the Central Asian countries and Azerbaijan. Islamic factor significantly predetermined policy of Russia during its historical development. The importance of Islam in contemporary political life has been underlined by many gover...

  11. Asma bronquial: factores de riesgo de las crisis y factores preventivos Bronchial asthma: risk factors of crises and preventive factors

    Directory of Open Access Journals (Sweden)

    Anselmo Abdo Rodríguez

    2007-09-01

    Full Text Available En los últimos años, y con motivo de los avances que se realizan en el campo de la investigación del asma bronquial, los conceptos en su prevención han ido cambiando entre los especialistas que lo tratan. Este trabajo tiene como objetivo llevar el conocimiento básico necesario a los profesionales de la medicina, para que a cada paciente asmático, atendido por primera vez, se le determinen los alergenos desencadenantes, los factores agravantes y socioculturales que le rodean y que pueden estar afectándolo. Se aborda la sensibilización a alergenos desde la etapa embrionaria y lactancia en el niño atópico, cuándo debemos considerar a un niño con alto riesgo alérgico, los factores de riesgo más importantes, con experiencias prácticas en el Hospital Universitario “Calixto García”, y las recomendaciones para la prevención de las enfermedades alérgicas en lactantes e infantes de alto riesgo alérgico.En recent years and advances in research field of bronchial asthma, features in its prevention has been changing among specialists treating it. Aim of this paper is to transmit the basic and necessary knowledge to medicine professionals for that in each asthmatic patient treated for the first time, the triggering allergens, aggravating factors, and the surrounded sociocultural ones, affecting him be determined. Authors approach sensitivity to allergens from embryonic stage and the lactation in atopic child, when we must to consider the case of an allergic and in high risk child, the more significant risk factors, with practical experiences in “Calixto García” University Hospital, and recommendations for preventions of allergic diseases in infants and breast-fed child in high risk of allergy.

  12. Insomnia: prevalence and associated factors

    OpenAIRE

    Lopes, Cátia; Lopes, Daniela; Ferreira, Sofia; Correia, Teresa; Pinto, Isabel C.

    2014-01-01

    Nowadays sleep disorders are very common and affect most of the population, the most common may be insomnia. Insomnia is defined as the difficulty of initiating or maintaining sleep it, may also be reflected in an early wake up and by the presence of a non-restful sleep and it is associated with impairment in social and occupational functioning of the individual. Knowing the prevalence and the associated factors of insomnia. This is a cross-sectional epidemiological study. The pop...

  13. Human factors in waste management

    Energy Technology Data Exchange (ETDEWEB)

    Moray, N. [Univ. of Illinois, Urbana, IL (United States)

    1994-10-01

    This article examines the role of human factors in radioactive waste management. Although few problems and ergonomics are special to radioactive waste management, some problems are unique especially with long term storage. The entire sociotechnical system must be looked at in order to see where improvement can take place because operator errors, as seen in Chernobyl and Bhopal, are ultimately the result of management errors.

  14. Performance conditional factors in rowing

    OpenAIRE

    Penichet-Tomás, Alfonso; Pueo, Basilio

    2017-01-01

    Literature has established strong relationships between some anthropometric and strength measures with rowing performance. However these studies have not correlated rower’s success with absolute (watt average) and relative weight values (watts per unit weight). The aim of this study was to correlate performance and efficiency in rowing with anthropometric and strength factors. Twenty-two elite rowers (11 male and 11 female) volunteered to participate in this study. Anthropometric measurements...

  15. Psychological factors affecting equine performance

    OpenAIRE

    McBride, Sebastian D; Mills, Daniel S

    2012-01-01

    Abstract For optimal individual performance within any equestrian discipline horses must be in peak physical condition and have the correct psychological state. This review discusses the psychological factors that affect the performance of the horse and, in turn, identifies areas within the competition horse industry where current behavioral research and established behavioral modification techniques could be applied to further enhance the performance of animals. In particular, the role of af...

  16. Factorizing the time evolution operator

    International Nuclear Information System (INIS)

    Garcia Quijas, P C; Arevalo Aguilar, L M

    2007-01-01

    There is a widespread belief in the quantum physical community, and textbooks used to teach quantum mechanics, that it is a difficult task to apply the time evolution operator e itH-hat/h on an initial wavefunction. Because the Hamiltonian operator is, generally, the sum of two operators, then it is not possible to apply the time evolution operator on an initial wavefunction ψ(x, 0), for it implies using terms like (a-hat + b-hat). A possible solution is to factorize the time evolution operator and then apply successively the individual exponential operator on the initial wavefunction. However, the exponential operator does not directly factorize, i.e. e a-hat+b-hat ≠ e a-hat e b-hat . In this study we present a useful procedure for factorizing the time evolution operator when the argument of the exponential is a sum of two operators, which obey specific commutation relations. Then, we apply the exponential operator as an evolution operator for the case of elementary unidimensional potentials, like a particle subject to a constant force and a harmonic oscillator. Also, we discuss an apparent paradox concerning the time evolution operator and non-spreading wave packets addressed previously in the literature

  17. Tissue Factor Structure and Function

    Directory of Open Access Journals (Sweden)

    Saulius Butenas

    2012-01-01

    Full Text Available Tissue factor (TF is an integral membrane protein that is essential to life. It is a component of the factor VIIa-TF complex enzyme and plays a primary role in both normal hemostasis and thrombosis. With a vascular injury, TF becomes exposed to blood and binds plasma factor VIIa, and the resulting complex initiates a series of enzymatic reactions leading to clot formation and vascular sealing. Many cells, both healthy, and tumor cells, produce detectable amounts of TF, especially when they are stimulated by various agents. Despite the relative simplicity and small size of TF, there are numerous contradictory reports about the synthesis and presentation of TF on blood cells and circulation in normal blood either on microparticles or as a soluble protein. Another subject of controversy is related to the structure/function of TF. It has been almost commonly accepted that cell-surface-associated TF has low (if any activity, that is, is “encrypted” and requires specific conditions/reagents to become active, that is, “decrypted.” However there is a lack of agreement related to the mechanism and processes leading to alterations in TF function. In this paper TF structure, presentation, and function, and controversies concerning these features are discussed.

  18. Human Factors in Financial Trading

    Science.gov (United States)

    Leaver, Meghan; Reader, Tom W.

    2016-01-01

    Objective This study tests the reliability of a system (FINANS) to collect and analyze incident reports in the financial trading domain and is guided by a human factors taxonomy used to describe error in the trading domain. Background Research indicates the utility of applying human factors theory to understand error in finance, yet empirical research is lacking. We report on the development of the first system for capturing and analyzing human factors–related issues in operational trading incidents. Method In the first study, 20 incidents are analyzed by an expert user group against a referent standard to establish the reliability of FINANS. In the second study, 750 incidents are analyzed using distribution, mean, pathway, and associative analysis to describe the data. Results Kappa scores indicate that categories within FINANS can be reliably used to identify and extract data on human factors–related problems underlying trading incidents. Approximately 1% of trades (n = 750) lead to an incident. Slip/lapse (61%), situation awareness (51%), and teamwork (40%) were found to be the most common problems underlying incidents. For the most serious incidents, problems in situation awareness and teamwork were most common. Conclusion We show that (a) experts in the trading domain can reliably and accurately code human factors in incidents, (b) 1% of trades incur error, and (c) poor teamwork skills and situation awareness underpin the most critical incidents. Application This research provides data crucial for ameliorating risk within financial trading organizations, with implications for regulation and policy. PMID:27142394

  19. College factors that influence drinking.

    Science.gov (United States)

    Presley, Cheryl A; Meilman, Philip W; Leichliter, Jami S

    2002-03-01

    The purpose of this article is to examine the aspects of collegiate environments, rather than student characteristics, that influence drinking. Unfortunately, the existing literature is scant on this topic. A literature review of articles primarily published within the last 10 years, along with some earlier "landmark" studies of collegiate drinking in the United States, was conducted to determine institutional factors that influence the consumption of alcohol. In addition, a demonstration analysis of Core Alcohol and Drug Survey research findings was conducted to further elucidate the issues. Several factors have been shown to relate to drinking: (1) organizational property variables of campuses, including affiliations (historically black institutions, women's institutions), presence of a Greek system, athletics and 2- or 4-year designation; (2) physical and behavioral property variables of campuses, including type of residence, institution size, location and quantity of heavy episodic drinking; and (3) campus community property variables, including pricing and availability and outlet density. Studies, however, tend to look at individual variables one at a time rather than in combination (multivariate analyses). Some new analyses, using Core Alcohol and Drug Survey data sets, are presented as examples of promising approaches to future research. Given the complexities of campus environments, it continues to be a challenge to the field to firmly establish the most compelling institutional and environmental factors relating to high-risk collegiate drinking.

  20. Factors Influencing Learner Permit Duration

    Directory of Open Access Journals (Sweden)

    Johnathon P. Ehsani

    2016-12-01

    Full Text Available An increasing number of countries are requiring an extended learner permit prior to independent driving. The question of when drivers begin the learner permit period, and how long they hold the permit before advancing to independent licensure has received little research attention. Licensure timing is likely to be related to “push” and “pull” factors which may encourage or inhibit the process. To examine this question, we recruited a sample of 90 novice drivers (49 females and 41 males, average age of 15.6 years soon after they obtained a learner permit and instrumented their vehicles to collect a range of driving data. Participants completed a series of surveys at recruitment related to factors that may influence licensure timing. Two distinct findings emerged from the time-to-event analysis that tested these push and pull factors in relation to licensure timing. The first can be conceptualized as teens’ motivation to drive (push, reflected in a younger age when obtaining a learner permit and extensive pre-permit driving experience. The second finding was teens’ perceptions of their parents’ knowledge of their activities (pull; a proxy for a parents’ attentiveness to their teens’ lives. Teens who reported higher levels of their parents’ knowledge of their activities took longer to advance to independent driving. These findings suggest time-to-licensure may be related to teens’ internal motivation to drive, and the ability of parents to facilitate or impede early licensure.