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Sample records for bloqueo angular agudo

  1. Efeito agudo do calçado de diferentes alturas sobre o comportamento angular do tornozelo Acute effect of shoes with different heights on the ankle angular behavior

    Directory of Open Access Journals (Sweden)

    Mirieli Denardi Limana

    2012-09-01

    Full Text Available Estudos descrevem que o uso de salto alto exige do corpo uma série de ajustes compensatórios, a fim de manter os seus movimentos e equilíbrio próximos à normalidade. No andar, a interferência do salto alto sobre o pé e sobre a articulação do tornozelo parece desencadear uma postura diferente da posição anatômica. O presente estudo teve como objetivos comparar a cinemática sagital do tornozelo em diferentes calçados e verificar a existência de um limite de altura de salto que possa levar a articulação do tornozelo a adaptações durante o andar. Esta pesquisa, caracterizada como experimental, foi constituída por uma análise cinemática bidimensional do tornozelo no plano sagital. A amostra foi composta por dez universitárias, com média de idade de 19,2 (±1,8 anos, que caminharam sobre uma esteira utilizando um tênis e três sandálias do tipo tamanco, com saltos de 3, 7 e 10 cm. Para cada ciclo de passada, foram identificados picos de movimento do tornozelo referentes à dorsiflexão e à flexão plantar. Os resultados mostraram que na flexão plantar, com o aumento da altura do salto, há uma tendência de acentuação do pico angular do tornozelo. Concluiu-se que saltos acima de 3 cm de altura induzem a articulação do tornozelo a realizar uma flexão plantar sustentada, mudando as características da marcha na fase de apoio e de balanço. Tais evidências sugerem alturas de saltos menores de 3 cm como limites de segurança para manutenção do padrão normal da marcha em mulheres jovens.Studies have described that using high heels requires a series of compensatory adjustments of the body to keep its movements and balance close to normality. When walking, the interference of high heels on the foot and on the ankle joint seems to initiate a different posture from the anatomical position. The present study aimed at comparing the sagittal kinematics of the ankle in different shoes and at verifying the existence of a height

  2. Terapéutica del dolor agudo

    OpenAIRE

    Alonso Babarro, Alberto

    2006-01-01

    El abordaje del dolor agudo en la práctica clínica debe empezar siempre por una correcta valoración. La evaluación debe incluir tanto la investigación sobre el probable origen del dolor, sus características y su mecanismo fisiopatológico como la determinación de la intensidad del dolor para facilitarnos el control del tratamiento propuesto. Numerosos trabajos han evaluado mediante revisiones sistemáticas la utilidad de los diferentes tratamientos en los distintos cuadros de dolor agudo. A par...

  3. Nuevos antiagregantes plaquetarios en síndrome coronario agudo

    Directory of Open Access Journals (Sweden)

    Andrés F Buitrago

    2013-06-01

    Full Text Available En la actualidad las enfermedades cardiovasculares son la principal causa de muerte en los países industrializados y para 2020, lo serán en países en vía de desarrollo. El síndrome coronario agudo se caracteriza por la ruptura o erosión de una placa aterosclerótica que trae consigo grados variables de trombosis y embolización distal, que llevan a una disminución en la perfusión miocárdica. Posterior a la disrupción vascular, empieza un proceso de agregación, activación y adhesión plaquetaria que inicia la formación del trombo mural. Dado que el primer paso en la formación del trombo coronario involucra la activación y la agregación plaquetaria, el tratamiento con medicamentos antiplaquetarios es una de las piedras angulares del síndrome coronario agudo. La antiagregación dual con ácido acetil salicílico y un inhibidor del receptor P2Y12, hacen parte del manejo actual de los pacientes con síndrome coronario agudo y de aquellos sometidos a intervención coronaria percutánea. El clopidogrel es el inhibidor del receptor P2Y12 más utilizado; sin embargo, sus beneficios clínicos se ven limitados por varios factores que interfieren con la conversión del medicamento a su metabolito activo. Es por esto que recientemente se han desarrollado nuevos inhibidores del receptor P2Y12, como prasugrel y ticagrelor, con un efecto antiplaquetario más potente y mayores beneficios clínicos. Las actualizaciones recientes de las guías de manejo basadas en la evidencia los han incluido como parte del tratamiento de esta patología con un grado de recomendación incluso mayor que el de clopidogrel.

  4. Esclerosis sistémica complicada con síncope y bloqueo AV completo

    Directory of Open Access Journals (Sweden)

    Francisco Femenía

    2010-10-01

    Full Text Available La esclerosis sistémica es una compleja enfermedad que afecta el tejido conectivo, el sistema vascular y el sistema inmunológico, y se caracteriza por fibrosis cutánea y de órganos viscerales. Los bloqueos de rama y los hemibloqueos se presentan en el 25 a 75% de los casos y constituyen predictores independientes de mortalidad. Los bloqueos auriculoventriculares de segundo o tercer grado son muy raros. Presentamos el caso de una mujer de 47 años de edad, con diagnóstico de esclerosis sistémica, quien presenta episodio sincopal secundario a bloqueo auriculoventricular completo con necesidad de implante de marcapasos definitivo.

  5. Esclerosis sistémica complicada con síncope y bloqueo AV completo

    OpenAIRE

    Francisco Femenía; Mauricio Arce; Martín Arrieta

    2010-01-01

    La esclerosis sistémica es una compleja enfermedad que afecta el tejido conectivo, el sistema vascular y el sistema inmunológico, y se caracteriza por fibrosis cutánea y de órganos viscerales. Los bloqueos de rama y los hemibloqueos se presentan en el 25 a 75% de los casos y constituyen predictores independientes de mortalidad. Los bloqueos auriculoventriculares de segundo o tercer grado son muy raros. Presentamos el caso de una mujer de 47 años de edad, con diagnóstico de esclerosis sistémic...

  6. Bloqueo y ensombrecimiento en un grupo de vertebrados filogenéticamente antiguo: los anfibios

    OpenAIRE

    Daneri, M. Florencia; Muzio, Rubén N

    2013-01-01

    En este artículo se describe el estudio de los fenómenos de bloqueo y ensombrecimiento en una tarea de aprendizaje espacial en un anfibio, el sapo terrestre Rhinella arenarum. Ambos fenómenos de aprendizaje, ampliamente observados en otras clases de vertebrados, se describen por primera vez en un grupo con un cerebro flogenéticamente antiguo, como es el caso de los anfibios. Específicamente, se observó durante el aprendizaje espacial: (1) bloqueo entre claves visuales asociadas a una meta, y ...

  7. Bloqueo y ensombrecimiento en un grupo de vertebrados filogenéticamente antiguo: los anfibios

    OpenAIRE

    M. Florencia Daneri; Rubén N. Muzio

    2013-01-01

    En este artículo se describe el estudio de los fenómenos de bloqueo y ensombrecimiento en una tarea de aprendizaje espacial en un anfibio, el sapo terrestre Rhinella arenarum. Ambos fenómenos de aprendizaje, ampliamente observados en otras clases de vertebrados, se describen por primera vez en un grupo con un cerebro filogenéticamente antiguo, como es el caso de los anfibios. Específicamente, se observó durante el aprendizaje espacial: (1) bloqueo entre claves visuales asociadas a una meta,...

  8. Edema pulmonar agudo neurogênico: relato de caso

    OpenAIRE

    Brito,José Correia De Farias; Diniz,Maria Cerly Almeida; Rosas,Roberto Ramalho; Silva,José Alberto Gonçalves Da

    1995-01-01

    Os autores apresentam um caso de edema pulmonar agudo numa paciente de 28 anos de idade acometida de hemorragia subaracnóidea secundária à rotura de aneurisma intracraniano. A sintomatologia respiratória ocorreu durante o agravamento do quadro neurológico. Alguns aspectos etiológicos e fisiopatogênicos do edema pulmonar agudo neurogênico são analisados.

  9. Infarto Miocárdico Agudo: una perspectiva desde la Atención Primaria de Salud

    Directory of Open Access Journals (Sweden)

    Lianne Ramos Marrero

    Full Text Available Introducción: las enfermedades del corazón constituyen la primera causa de muerte a nivel mundial. Durante más de cuatro décadas, Cuba comportó similar estadística hasta el año 2012, a partir del cual el cáncer se situó como la primera causa de muerte; no obstante la enfermedades cardiovasculares constituyen un problema de salud de segundo orden para Cuba y dentro de este ítem el infarto miocárdico agudo como la principal causa de muerte. Objetivo: profundizar en el conocimiento sobre los elementos diagnósticos y de la conducta ante un infarto miocárdico agudo en el nivel primario de atención. Desarrollo: se hace especial énfasis en los elementos diagnósticos y la conducta recomendada ajustada a las posibilidades del nivel primario de atención. Conclusiones: el Infarto miocárdico agudo aporta la mayor mortalidad dentro de las enfermedades cardiacas, de causa multifactorial, su diagnóstico en la atención primaria de salud se basa en el cuadro clínico y cambios electrocardiográficos. La trombólisis es piedra angular en el tratamiento temprano de reperfusión.

  10. PAPEL DEL FACTOR DE BLOQUEO INDUCIDO POR PROGESTERONA (PIBF) EN EMBARAZO Y CÁNCER

    OpenAIRE

    Gutiérrez-Rodríguez, Araceli; Camacho-Arroyo, Ignacio

    2016-01-01

    El factor de bloqueo inducido por progesterona (PIBF) es una proteína inmunomoduladora por medio de la cual la progesterona ejerce varios de sus efectos inmunológicos en diferentes células de alta proliferación, que incluyen desde células embrionarias hasta células tumorales. El PIBF ocasiona un incremento en la síntesis de anticuerpos asimétricos y de citocinas tipo Th2 como las interleucinas (IL) 4, 6 y 10, así como una disminución en la actividad citotóxica de las células NK...

  11. Angular Momentum

    Science.gov (United States)

    Shakur, Asif; Sinatra, Taylor

    2013-01-01

    The gyroscope in a smartphone was employed in a physics laboratory setting to verify the conservation of angular momentum and the nonconservation of rotational kinetic energy. As is well-known, smartphones are ubiquitous on college campuses. These devices have a panoply of built-in sensors. This creates a unique opportunity for a new paradigm in…

  12. Comunicación interventricular post infarto agudo del miocardio

    Directory of Open Access Journals (Sweden)

    Fabián A. Ruiz, MD

    2013-11-01

    En este artículo se expone el caso de un paciente con síndrome coronario agudo sin terapia de reperfusión inicial, con posterior ruptura del septum interventricular, en quien se evidenció la utilidad de la ecocardiografía en el diagnóstico de dicha entidad.

  13. Oxcarbazepina para los episodios afectivos agudos en el trastorno bipolar

    Directory of Open Access Journals (Sweden)

    Akshya Vasudev

    2012-09-01

    Se necesitan ensayos controlados con asignación aleatoria con adecuado poder estadístico y de buena calidad metodológica para informar el potencial terapéutico de la oxcarbazepina a través del espectro de episodios agudos en el trastorno bipolar.

  14. Manejo prehospitalario del síndrome coronario agudo

    OpenAIRE

    Borrego Alfaraz, Cristina

    2017-01-01

    [EN] La cardiopatía isquémica, concretamente el síndrome coronario agudo, es una de las principales causas de mortalidad a nivel mundial. Además, con el envejecimiento de la población, su incidencia aumentará en las próximas décadas. Es por ello por lo que el conocimiento sobre este tema y la mejora en su abordaje se tornan imprescindibles. De esta manera, el manejo prehospitalario del síndrome coronario agudo se caracteriza por su rápida detección a través de la interpretación de un el...

  15. Influencia del bloqueo directo y el uno contra uno en el éxito del lanzamiento en baloncesto

    Directory of Open Access Journals (Sweden)

    Verónica Muñoz Arroyave

    2015-03-01

    Full Text Available El presente estudio tiene como objetivo analizar el impacto del uno contra uno y el bloqueo directo sobre la eficacia en los lanzamientos. Se desarrolló un instrumento ad hoc denominado sistema de observación de conceptos fundamentales en baloncesto (SOCFB para estudiar las acciones ofensivas del Fútbol Club Barcelona Regal en la Copa del Rey en la temporada 2013-2014. Se analizaron un total de 643 acciones ofensivas donde se destacan los siguientes hallazgos: a el 34 % de las acciones del jugador con balón finalizaron en lanzamiento mientras que el 66 % terminaron en pases; b la principal consecuencia del uno contra uno interior fueron los lanzamientos (z = 6,2, p < 0,001; c en el uno contra uno exterior se encontraron relaciones estadísticamente significativas con el espacio exterior de la zona (z = 3,3, p < 0,001 y la lateralidad del espacio lateral izquierdo (z = 2, p <0,05; d en el bloqueo directo se observaron relaciones estadísticamente significativas con las acciones que no finalizaron. De estos resultados podemos extraer las siguientes conclusiones: a el bloqueo directo es el concepto más utilizado y fue utilizado como medio para la generación de ventajas; b el uno contra uno interior genera más lanzamientos y de mayor efectividad.

  16. Papel del factor de bloqueo inducido por Progesterona (PIBF en embarazo y cáncer

    Directory of Open Access Journals (Sweden)

    Araceli Gutiérrez-Rodríguez

    2016-01-01

    Full Text Available El factor de bloqueo inducido por progesterona (PIBF es una proteína inmunomoduladora por medio de la cual la progesterona ejerce varios de sus efectos inmunológicos en diferentes células de alta proliferación, que incluyen desde células embrionarias hasta células tumorales. El PIBF ocasiona un incremento en la síntesis de anticuerpos asimétricos y de citocinas tipo Th2 como las interleucinas (IL 4, 6 y 10, así como una disminución en la actividad citotóxica de las células NK y en la producción de citocinas tipo Th1, como el factor de necrosis tumoral alfa (TNFα e IL-12. Lo anterior provoca una reducción en la relación Th1/Th2 que es característica del embarazo sano, lo que tiene como consecuencia un aumento en la inmunidad humoral y una disminución en la inmunidad celular. Estos mecanismos inmunomoduladores tienen como resultado una evasión del sistema inmune de la madre por parte del feto para que el embarazo llegue a término. De manera interesante, diversos estudios sugieren que estos mismos mecanismos son utilizados por las células cancerosas para facilitar la progresión de tumores que presentan sobre-expresión del PIBF.

  17. El blocao (y el bloqueo de José Díaz Fernández

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    Luis Fernando Bueno Morillas

    2015-06-01

    Full Text Available El blocao (1928 fue la primera novela de José Díaz Fernández. Supuso un éxito editorial insólito hasta entonces porque reunía tres características novedosas: una actitud crítica ante la guerra de Marruecos, una integración de las novedades vanguardistas en la que su autor llamó literatura de avanzada y un posicionamiento del intelectual al lado de las reivindicaciones del pueblo. Sin embargo, aunque publicó otra novela un año después (La Venus mecánica, un libro teórico en el que definía la literatura que él propugnaba y practicaba (El nuevo romanticismo y algunas narraciones breves, Díaz Fernández se bloqueó y dejó la literatura narrativa que tan buenas expectativas levantó. Analizaremos las posibles causas de ese bloqueo.

  18. El sólido hiperbólico agudo

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    Rosa María Herrera

    2012-04-01

    Full Text Available Torricelli consideró el cálculo del volumen de sólido hiperbólico agudo como el mejor logro en sus trabajos con ‘indivisibles curvos’. Fue publicado en la Opera geometrica. Aquí se presenta como muestra del estilo de las demostraciones matemáticas (geométricas que se efectuaban en el siglo XVII, y por su valor precursor del cálculo infinitesimal. Es un ejemplo significativo para aproximarse al pensamiento torricelliano.

  19. Estado Confusional Agudo nas Unidades de Cuidados Intensivos

    OpenAIRE

    Santos, L; Alcântara, J

    1996-01-01

    As alterações do comportamento frequentemente observadas em doentes internados nas unidades de cuidados intensivos (UCI), podem ser adequadamente designadas, na maioria das vezes, por estado confusional agudo, o qual se caracteriza por: flutuação do estado de vigília, distúrbio do ciclo vigília-sono, défice de atenção e concentração, desorganização do pensamento, manifestado entre outras formas por discurso incoerente, distúrbios da percepção sob a forma de ilusões e/ou alucinações, desorient...

  20. Bloqueo facetario guiado por TC; eficacia diagnóstica, eficacia terapéutica e indicaciones radiológicas.

    OpenAIRE

    Motos Cabodevilla, Naiara

    2013-01-01

    El origen del dolor lumbar puede ser diverso pero una de las principales causa es el síndrome facetario. Este estudio tiene como objetivo determinar la eficacia diagnóstica y eficacia terapéutica de los bloqueos facetarios mediante infiltraciones guiadas por tomografía computarizada (TC). Asimismo establecer posibles indicaciones o criterios diagnósticos radiológicos del síndrome facetario El bloqueo facetario guiado por TC es un procedimiento simple, seguro y mínimamente invasivo que puede s...

  1. Tratamiento del dolor agudo en el paciente dependiente de sustancias

    Directory of Open Access Journals (Sweden)

    DR. B. Juan Pablo Acuña

    2014-07-01

    Full Text Available El manejo del dolor agudo del paciente dependiente de sustancias, es un desafío para el profesional encargado de otorgar alivio a su síntoma. La dependencia de sustancias es reconocida como una enfermedad cerebral primaria crónica y recurrente. Su neurobiología y mecanismos fisiopatológicos de adaptación a la sustancia generan cambios en la percepción del dolor, en la respuesta a analgésicos opioides y cambios conductuales que interfieren con el tratamiento del dolor. Un conocimiento básico y claro respecto de lo descrito permite diseñar estrategias seguras y eficaces de alivio del dolor, sin interferir el curso de la enfermedad adictiva. Artículos de revisión, recomendaciones y guías elaboradas por expertos coinciden en que el tratamiento más eficaz del dolor incluye un manejo multimodal, un enfoque multidisciplinario, mantención de la terapia de sustitución y una estrecha vigilancia durante el episodio agudo de dolor y su seguimiento posterior.

  2. Efeitos do exercicio agudo sobre biomarcadores sericos de ratos diabeticos

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    Fabio Milioni

    2014-01-01

    Full Text Available INTRODUÇÃO: As respostas ao exercício agudo dos biomarcadores, como a fosfatase alcalina (FA e a creatina quinase (CK séricas têm sido pouco investigadas em ratos diabéticos. OBJETIVOS: Verificar os efeitos do exercício físico aeróbio agudo sobre as concentrações de CK e FA, bem como, avaliar o estado hídrico em ratos diabéticos experimentais. MATERIAIS E MÉTODOS Foram utilizados ratos Wistar machos, adultos jovens, distribuídos em dois grupos: diabéticos (DA e controles (CA. O diabetes foi induzido por meio da administração de aloxana monoidratado Sigma(r (32 mg/kg de peso corporal. Duas semanas após confirmação do diabetes, ambos os grupos foram submetidos a uma sessão aguda de natação por 30 min, com carga aeróbia (4,5 % do peso corporal. Foram avaliados: glicose, hematócrito, CK, FA, albumina e a cinética de lactato durante o exercício por meio de coletas 25 µL de sangue da cauda dos animais, nos minutos 0, 10, 20 e 30 de exercício. RESULTADOS: ANOVA de dois fatores para medidas repetidas e o teste post hoc de Tukey apontaram diminuição significativa dos valores de glicemia após o exercício para o grupo DA, aumento significativo de CK pós-exercício para o grupo DA, aumento significativo de hematócrito para ambos os grupos após exercício e manutenção da FA após exercício para o grupo DA. CONCLUSÃO: O exercício agudo aeróbio foi eficiente no controle dos níveis glicêmicos de ratos diabéticos. Entretanto, deve ser aplicado com cautela, pois induziu altos valores de CK, sugerindo possíveis lesões teciduais.

  3. Doença periodontal e infarto agudo do miocardio

    OpenAIRE

    Coelho, Julita Maria Freitas

    2010-01-01

    p. 1-98 Dados epidemiológicos, experimentais e clínicos têm sugerido que a doença periodontal, especialmente a periodontite crônica, pode constituir um fator de risco para doenças cardiovasculares isquêmicas. A proposta deste estudo foi investigar a associação entre a doença periodontal e o infarto agudo do miocárdio (IAM) em indivíduos adultos. Uma revisão de literatura de estudos de caso-controle que estudaram essa associação foi sumarizada em uma meta-análise que demonstrou uma chance e...

  4. Efeitos agudos da corrente interferencial ganglionar em mulheres sadias

    OpenAIRE

    Nakata, Cláudio Hiroshi

    2014-01-01

    OBJETIVO: Analisar os efeitos agudos da corrente interferencial ganglionar em mulheres sadias. MATERIAIS E MÉTODOS: Estudo do tipo experimental aleatorizado e transversal. Vinte e uma mulheres militares do Exército Brasileiro divididas em dois grupos, conforme IPAQ, em ativas (média de idade de 32,80 ± 3,011 anos, massa 56,50 ± 5,523 Kg, estatura de 164,30 ± 6,993 cm e IMC de 20,90 ± 1,729 kg/m2 e 80% com conceito excelente no teste de aptidão física) e irregularmente ativas (média de idade d...

  5. Bloqueios nervosos guiados por ultra-som Bloqueos nerviosos guiados por ultrasonido Ultrasound-guided nerve blocks

    Directory of Open Access Journals (Sweden)

    Pablo Escovedo Helayel

    2007-02-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: As técnicas de bloqueios nervosos guiados por ultra-som são baseadas na visualização direta das estruturas nervosas, da agulha de bloqueio e das estruturas anatômicas adjacentes. Desta maneira, é possível depositar a solução de anestésico local precisamente em torno dos nervos e acompanhar a sua dispersão em tempo real, obtendo-se, assim, um bloqueio mais eficaz, de menor latência, menor dependência de referências anatômicas, menor volume de solução anestésica e maior segurança. CONTEÚDO: O artigo revisa os aspectos relativos aos mecanismos físicos para formação de imagens, a anatomia ultra-sonográfica do neuroeixo e dos plexos braquial e lombossacral, os equipamentos e materiais empregados nos bloqueios, os ajustes do aparelho de ultra-som para melhorar as imagens, os planos de visualização das agulhas de bloqueio e as técnicas e o treinamento em bloqueios guiados por ultra-som. CONCLUSÕES: Os passos para se obter sucesso em anestesia regional incluem a identificação exata da posição dos nervos, a localização precisa da agulha, sem lesões nas estruturas adjacentes e, finalmente, a injeção cuidadosa de anestésico local junto aos nervos. Embora a neuroestimulação forneça grande auxílio na identificação dos nervos, esta não consegue, isoladamente, preencher todas essas exigências. Por isso, acredita-se que os bloqueios guiados por ultra-som serão a técnica de eleição para anestesia regional num futuro não muito distante.JUSTIFICATIVA Y OBJETIVOS: Las técnicas de bloqueos nerviosos guiados por ultrasonido se basan en la visualización directa de las estructuras nerviosas, de la aguja de bloqueo y de las estructuras anatómicas adyacentes. De esa manera, se puede depositar la solución de anestésico local precisamente en torno de los nervios y acompañar su dispersión en tiempo real, obteniéndose así, un bloqueo más eficaz, de menor latencia, menor dependencia de

  6. Professional AngularJS

    CERN Document Server

    Karpov, Valeri

    2015-01-01

    A comprehensive guide to AngularJS, Google's open-source client-side framework for app development. Most of the existing guides to AngularJS struggle to provide simple and understandable explanations for more advanced concepts. As a result, some developers who understand all the basic concepts of AngularJS struggle when it comes to building more complex real-world applications. Professional AngularJS provides a thorough understanding of AngularJS, covering everything from basic concepts, such as directives and data binding, to more advanced concepts like transclusion, build systems, and auto

  7. Infarto agudo de miocardio inducido por heroína

    Directory of Open Access Journals (Sweden)

    Beatriz Wills

    2014-09-01

    Full Text Available El uso mundial de drogas recreativas ha alcanzado proporciones preocupantes, al punto de amenazar la estabilidad socioeconómica de los países. Se estima que en los países desarrollados una de cada 4 personas ha utilizado drogas recreativas en algún momento de su vida. Por tanto, es frecuente que los médicos se enfrenten a cuadros de intoxicación secundaria al abuso de estas drogas. Además de sus efectos en el sistema nervioso central, también producen cambios significativos a nivel cardiovascular, responsables de una cantidad no despreciable de morbimortalidad relacionada con estas. En este artículo se expone un caso de infarto agudo de miocardio secundario al consumo de heroína, se revisan los efectos sistémicos de esta droga y se examinan el manejo y los mecanismos estudiados que explican esta relación.

  8. Angular correlation methods

    International Nuclear Information System (INIS)

    Ferguson, A.J.

    1974-01-01

    An outline of the theory of angular correlations is presented, and the difference between the modern density matrix method and the traditional wave function method is stressed. Comments are offered on particular angular correlation theoretical techniques. A brief discussion is given of recent studies of gamma ray angular correlations of reaction products recoiling with high velocity into vacuum. Two methods for optimization to obtain the most accurate expansion coefficients of the correlation are discussed. (1 figure, 53 references) (U.S.)

  9. Síndrome coronario agudo con supradesnivel del ST asociado al feocromocitoma con las catecolaminas inicialmente normales

    Directory of Open Access Journals (Sweden)

    Jorge M. Pacheco

    2016-01-01

    Full Text Available Los feocromocitomas son tumores secretores de catecolaminas que cursan con paroxismos de hipertensión o hipotensión arterial y palpitaciones. Son una causa rara del síndrome coronario agudo. Presentamos el caso de una paciente con síndrome coronario agudo secundario a feocromocitoma que inicialmente tenía valores normales de catecolaminas.

  10. Síndrome coronario agudo con supradesnivel del ST asociado al feocromocitoma con las catecolaminas inicialmente normales

    OpenAIRE

    Pacheco, Jorge M.; Pérez Baztarrica, Gabriel; Díaz Bozio, Fernando; Jiménez, Andrés; Porcile, Rafael

    2016-01-01

    Los feocromocitomas son tumores secretores de catecolaminas que cursan con paroxismos de hipertensión o hipotensión arterial y palpitaciones. Son una causa rara del síndrome coronario agudo. Presentamos el caso de una paciente con síndrome coronario agudo secundario a feocromocitoma que inicialmente tenía valores normales de catecolaminas.

  11. Rotations and angular momentum

    International Nuclear Information System (INIS)

    Nyborg, P.; Froyland, J.

    1979-01-01

    This paper is devoted to the analysis of rotational invariance and the properties of angular momentum in quantum mechanics. In particular, the problem of addition of angular momenta is treated in detail, and tables of Clebsch-Gordan coefficients are included

  12. Angular Acceleration without Torque?

    Science.gov (United States)

    Kaufman, Richard D.

    2012-01-01

    Hardly. Just as Robert Johns qualitatively describes angular acceleration by an internal force in his article "Acceleration Without Force?" here we will extend the discussion to consider angular acceleration by an internal torque. As we will see, this internal torque is due to an internal force acting at a distance from an instantaneous center.

  13. Esclerosis sistémica complicada con síncope y bloqueo AV completo Systemic sclerosis complicated with syncope and complete AV block

    Directory of Open Access Journals (Sweden)

    Francisco Femenía

    2010-10-01

    Full Text Available La esclerosis sistémica es una compleja enfermedad que afecta el tejido conectivo, el sistema vascular y el sistema inmunológico, y se caracteriza por fibrosis cutánea y de órganos viscerales. Los bloqueos de rama y los hemibloqueos se presentan en el 25 a 75% de los casos y constituyen predictores independientes de mortalidad. Los bloqueos auriculoventriculares de segundo o tercer grado son muy raros. Presentamos el caso de una mujer de 47 años de edad, con diagnóstico de esclerosis sistémica, quien presenta episodio sincopal secundario a bloqueo auriculoventricular completo con necesidad de implante de marcapasos definitivo.Systemic sclerosis is a complex disease that affects the connective tissue, the vascular system and the immune system. It typically produces skin and organ fibrosis. Cardiac bundle branch blocks and fascicular blocks occur in 25-75% of the cases and were found to be independent predictors of mortality. Second and third degree atrioventricular block are very rare. We present the case of a 47 year-old female with diagnosis of systemic sclerosis, presented with syncope secondary to complete atrioventricular block requiring permanent pacemaker implantation.

  14. Abdomen agudo quirúrgico en el anciano

    Directory of Open Access Journals (Sweden)

    Jesús M Valdés Jiménez

    2002-04-01

    Full Text Available Se presenta un estudio descriptivo retrospectivo de 156 enfermos mayores de 65 años, con diagnóstico de abdomen agudo quirúrgico (AAQ, operados en el Hospital Clinicoquirúrgico «Manuel Fajardo» e ingresados en la Unidad de Cuidados Intermedios Polivalente, durante el trienio comprendido entre 1995 y 1998. Las causas más frecuentes del síndrome fueron la oclusión intestinal (58,9 %, la colecistitis aguda (13,5 % y la úlcera péptica gastroduodenal perforada (10,9 %. Las enfermedades asociadas de mayor prevalencia eran la cardiopatía isquémica (62,2 % y la hipertensión arterial (48,7 %. La mortalidad aumentó con el avance de la edad, y alcanzó el 70,4 % en los mayores de 85 años. Entre las complicaciones predominaron la infección de la herida quirúrgica (12,8 % y la bronconeumonía (5,8 %. La principal causa de muerte fue la sepsis (10,3 %A descriptive and retrospective study of 156 patients over 65 with diagnosis of acute surgical abdomen (ASA that were operated on at "Manuel Fajardo" Clinical and Surgical Hospital and admitted at the Polyvalent Intermediate Care Unit, from 1995 to 1998, was conducted. The most common causes of the syndrome were intestinal occlusion (58.9 %, acute cholecystitis (13.5 % and the gastroduodenal perforated peptic ulcer (10.9 %. The associated diseases of highest prevalence were ischemic heart disease (62.2 % and arterial hypertension (48.7 %. Mortality increased with age and amounted to 70.4 % in patients over 85. The infection of the surgical wound (12.8 % and bronchopneumonia (5.8% prevailed among the complications. Sepsis (10.3 % was the main cause of death

  15. Abdome agudo por obstrução por ileobiliar

    Directory of Open Access Journals (Sweden)

    Márcia Cristina de Alencastro

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

  16. Anticuerpos anti-HLA y rechazo agudo del injerto renal en los niños

    OpenAIRE

    Galeas, Rubén Arturo; Gomezchico-Velasco, Rebeca; Valverde, Saúl; Ramón-García, Guillermo; Velásquez-Jones, Luis; Romero-Navarro, Benjamín; Hernández, Ana María; Vargas, Arindal; Leo, Claudia de; Medeiros, Mara

    2010-01-01

    Introducción. A pesar de que las nuevas terapias inmunosupresoras han mejorado notablemente la evolución clínica de los trasplantes renales, los rechazos agudo y crónico siguen limitando la sobrevida a largo plazo del injerto. En base a lo anterior, el objetivo de este estudio fue determinar la presencia de anticuerpos séricos contra antígenos de histocompatibilidad (HLA) clase I y clase II en niños con rechazo agudo del injerto renal. Métodos. Se realizó un estudio clínico prospectivo en pac...

  17. Quark Orbital Angular Momentum

    Directory of Open Access Journals (Sweden)

    Burkardt Matthias

    2015-01-01

    Full Text Available Definitions of orbital angular momentum based on Wigner distributions are used as a framework to discuss the connection between the Ji definition of the quark orbital angular momentum and that of Jaffe and Manohar. We find that the difference between these two definitions can be interpreted as the change in the quark orbital angular momentum as it leaves the target in a DIS experiment. The mechanism responsible for that change is similar to the mechanism that causes transverse single-spin asymmetries in semi-inclusive deep-inelastic scattering.

  18. Optical Angular Momentum

    International Nuclear Information System (INIS)

    Arimondo, Ennio

    2004-01-01

    For many years the Institute of Physics has published books on hot topics based on a collection of reprints from different journals, including some remarks by the editors of each volume. The book on Optical Angular Momentum, edited by L Allen, S M Barnett and M J Padgett, is a recent addition to the series. It reproduces forty four papers originally published in different journals and in a few cases it provides direct access to works not easily accessible to a web navigator. The collection covers nearly a hundred years of progress in physics, starting from an historic 1909 paper by Poynting, and ending with a 2002 paper by Padgett, Barnett and coworkers on the measurement of the orbital angular momentum of a single photon. The field of optical angular momentum has expanded greatly, creating an interdisciplinary attraction for researchers operating in quantum optics, atomic physics, solid state physics, biophysics and quantum information theory. The development of laser optics, especially the control of single mode sources, has made possible the specific design of optical radiation modes with a high degree of control on the light angular momentum. The editors of this book are important figures in the field of angular momentum, having contributed to key progress in the area. L Allen published an historical paper in 1999, he and M J Padgett (together with M Babiker) produced few years ago a long review article which is today still the most complete basic introduction to the angular momentum of light, while S M Barnett has contributed several high quality papers to the progress of this area of physics. The editors' choice provides an excellent overview to all readers, with papers classified into eight different topics, covering the basic principles of the light and spin and orbital angular momentum, the laboratory tools for creating laser beams carrying orbital angular momentum, the optical forces and torques created by laser beams carrying angular momentum on

  19. Angular Accelerating White Light

    CSIR Research Space (South Africa)

    Dudley, Angela L

    2015-08-01

    Full Text Available wavelength dependence. By digitally simulating free-space propagation on the SLM, The authors compare the effects of real and digital propagation on the angular rotation rates of the resulting optical fields for various wavelengths. The development...

  20. Angular trap for macroparticles

    International Nuclear Information System (INIS)

    Aksyonov, D.S.

    2013-01-01

    Properties of angular macroparticle traps were investigated in this work. These properties are required to design vacuum arc plasma filters. The correlation between trap geometry parameters and its ability to absorb macroparticles were found. Calculations allow one to predict the behaviour of filtering abilities of separators which contain such traps in their design. Recommendations regarding the use of angular traps in filters of different builds are given.

  1. Abdome agudo obstrutivo pela veia porta - relato de caso

    Directory of Open Access Journals (Sweden)

    Celeste Gomes Sardinha Oshiro

    2016-10-01

    Full Text Available Introdução: A veia porta pré-duodenal é uma anomalia congênita rara, sintomática em apenas 50% dos casos, sendo que seu diagnóstico é feito por laparotomia exploradora. O tratamento de escolha é cirúrgico, com bom prognóstico. Objetivo: Relatar um caso de Abdome Agudo Obstrutivo por Veia Porta Pré Doudenal (VPPD no período neonatal no Conjunto Hospitalar de Sorocaba. Metodologia: Descrição do referido caso e revisão de literatura. Relato de Caso: Recém-nascido de F.S.S., feminino, de parto normal em 30/05/2016, cuja mãe com 21 anos, apresentou durante pré-natal Diabetes Mellitus Gestacional e polihidrâmnio; negou consanguinidade, vícios e infecções. Ao nascimento, idade gestacional 38 1/7 semanas, peso 2865g, comprimento 47 cm, Apgar 9/9. Durante rotinas de sala de parto, à aspiração gástrica, saída de 55 ml de líquido claro com grumos (LCCG. No 4o dia de vida, episódios de vômito com sangue e distensão abdominal. No 11° dia de vida, realizada Laparotomia Exploradora que identificou dilatação gástrica e duodenal, principalmente na 3° porção, onde passa anteriormente a Veia Porta, comprimindo parcialmente a borda antimesentérica duodenal, o que comprometia seu esvaziamento. Realizada anastomose duodeno-jejunal. Recebeu alimentação parenteral por 15 dias. RN apresentou infecções fúngica e bacteriana, tratadas durante internação. Recebe alta com 46 dias de vida em aleitamento materno e boa recuperação clínica. Conclusão: Existem poucos relatos sobre a formação anômala da veia porta e suas consequências. O diagnóstico pré-natal ou pré-operatório de VPPD raramente é feito. Boa evolução pós correção cirúrgica.

  2. Trombolisis en el infarto agudo del miocardio en servicio de emergencias

    Directory of Open Access Journals (Sweden)

    Alexander del Toro Cámbara

    2013-12-01

    Full Text Available Introducción: las enfermedades cardiovasculares y dentro de estas, el infarto agudo del miocardio han sido el mayor problema de salud y la principal causa de muerte en muchos países del mundo durante varias décadas. Objetivo: determinar la efectividad de la estreptoquinasa recombinante cubana en la morbilidad y mortalidad del infarto agudo del miocardio. Material y método: se realizó una investigación observacional, descriptiva y transversal en los pacientes con diagnóstico de Infarto Agudo del Miocardio, que acudieron al servicio de emergencias del Policlínico Universitario Pedro Borrás, entre septiembre 2009 y agosto 2010. El universo lo integraron 56 pacientes con síndrome coronario agudo con elevación del ST, y la muestra 42 pacientes trombolizados. Las técnicas de procesamiento y análisis fueron la distribución en frecuencias absolutas y relativas y la prueba de ji cuadrado. Resultados: predominaron los pacientes del sexo masculino y edades comprendidas entre 45 y 60 años. Prevaleció la implantación del tratamiento por debajo de las seis horas, siendo tratados un número pequeño de pacientes durante la primera hora, efectiva en todos los casos. Sobresalieron como reacciones adversas la hipotensión arterial y las contracciones auriculares y ventriculares prematuras. Preponderó la desaparición del dolor y regresión de los cambios isquémicos electrocardiográficos como criterios de reperfusión. Conclusiones: el uso de la estreptoquinasa recombinante cubana contribuyó a disminuir la mortalidad en pacientes con infarto agudo al miocardio quedando así demostrado su efectividad.

  3. Fission fragment angular momentum

    International Nuclear Information System (INIS)

    Frenne, D. De

    1991-01-01

    Most of the energy released in fission is converted into translational kinetic energy of the fragments. The remaining excitation energy will be distributed among neutrons and gammas. An important parameter characterizing the scission configuration is the primary angular momentum of the nascent fragments. Neutron emission is not expected to decrease the spin of the fragments by more than one unit of angular momentum and is as such of less importance in the determination of the initial fragment spins. Gamma emission is a suitable tool in studying initial fragment spins because the emission time, number, energy, and multipolarity of the gammas strongly depend on the value of the primary angular momentum. The main conclusions of experiments on gamma emission were that the initial angular momentum of the fragments is large compared to the ground state spin and oriented perpendicular to the fission axis. Most of the recent information concerning initial fragment spin distributions comes from the measurement of isomeric ratios for isomeric pairs produced in fission. Although in nearly every mass chain isomers are known, only a small number are suitable for initial fission fragment spin studies. Yield and half-life considerations strongly limit the number of candidates. This has the advantage that the behavior of a specific isomeric pair can be investigated for a number of fissioning systems at different excitation energies of the fragments and fissioning nuclei. Because most of the recent information on primary angular momenta comes from measurements of isomeric ratios, the global deexcitation process of the fragments and the calculation of the initial fragment spin distribution from measured isomeric ratios are discussed here. The most important results on primary angular momentum determinations are reviewed and some theoretical approaches are given. 45 refs., 7 figs., 2 tabs

  4. Transporte electrogénico en el colon de ratas privadas de sodio : bloqueo de canales epiteliales versus inhibición de la NA, K-ATPASA

    OpenAIRE

    Carra, Graciela E.; Galella, Flavia; Widenberg, Johan; Ibáñez, Jorge E.; Saraví, Fernando D.

    2014-01-01

    La privación dietaria de sodio estimula la secreción de aldosterona. En el colon de rata, la aldosterona elevada aumenta la absorción de Na+, pero además torna electrogénico el mecanismo de absorción (normalmente electroneutro). Dicho transporte electrogénico puede suprimirse mediante el bloqueo de los canales epiteliales de Na+ en la membrana apical o la inhibición de la Na, KATPasa de la membrana basolateral. La absorción electrogénica de sodio está estrechamen...

  5. EVOLUCIÓN DE FENÓMENOS BÁSICOS DE APRENDIZAJE EN TAREAS DE MEMORIA ESPACIAL: BLOQUEO, ENSOMBRECIMIENTO E INHIBICIÓN LATENTE EN ANFIBIOS

    OpenAIRE

    MARÍA FLORENCIA DANERI; RUBÉN NÉSTOR MUZIO

    2015-01-01

    En este artículo se describen desde una perspectiva comparativa los fenómenos de bloqueo, ensombrecimiento e inhibición latente, enfatizando su presencia en tareas de aprendizaje espacial. Estos fenómenos de aprendizaje, ampliamente observados en otras clases de vertebrados e invertebrados, han sido recientemente descriptos por primera vez en anfibios, un grupo de vertebrados con un cerebro filogenéticamente antiguo. Tomando como modelo al sapo terrestre Rhinella arenarum, se revisarán los tr...

  6. Patrón visual de jugadoras experimentadas de voleibol durante la acción del bloqueo

    Directory of Open Access Journals (Sweden)

    Sara Vila-Maldonado

    2015-01-01

    Full Text Available El objetivo del presente estudio fue analizar el com- portamiento visual de las jugadoras de voleibol en una situación de bloqueo basándose en la figura de la colo- cadora. La muestra quedó compuesta por 29 jugadoras de voleibol (23.10 ± 3.74 años que competían de mane- ra federada. Se analizó el comportamiento visual de las jugadoras utilizando secuencias de vídeo proyectadas a tamaño real. Las participantes visionaron el mismo número de colocaciones, realizadas por dos jugadoras distintas, de su mismo nivel competitivo. Dentro del comportamiento visual se analizó la duración, núme- ro y orden de las fijaciones visuales, y los movimientos sacádicos. El número medio de fijaciones de las parti- cipantes fue de 3.61, con una duración media de 3.56 s. Encontramos un patrón en el comportamiento visual de las participantes del estudio basado en sus fijaciones visuales. Inicialmente las participantes utilizaban la vi- sión periférica para detectar diferentes estímulos de la escena y posteriormente su tendencia fue a utilizar la visión fóvea centrándose en distintas zonas concretas. Las zonas más fijadas por las participantes, de las cua- les extraen la información para su toma de decisiones, son fondo (FD y codo-muñeca (CM en primer lugar, seguidas de cabeza (CB, balón (BA, hombro-codo (HC, balón-muñeca (BM y tronco (TR.

  7. Bloqueio seletivo dos nervos supraescapular e axilar promove analgesia satisfatória e menor grau de bloqueio motor: comparação com o bloqueio interescalênico El bloqueo selectivo de los nervios supraescapular y axilar promueve una analgesia satisfactoria y un menor grado de bloqueo motor: comparación con el bloqueo interescalénico Selective suprascapular and axillary nerve block provides adequate analgesia and minimal motor block: comparison with interscalene block

    Directory of Open Access Journals (Sweden)

    Patrícia Falcão Pitombo

    2013-02-01

    . El objetivo de este estudio fue comparar el bloqueo de los nervios supraescapular y axilar en las cirugías artroscópicas de hombro con el abordaje interescalénico del plexo braquial. MÉTODO: Sesenta y ocho pacientes fueron ubicados en dos grupos de 34, de acuerdo con la técnica utilizada: grupo Interescalénico (GI y grupo selectivo (GS, siendo ambos abordajes realizados con neuroestimulador. En el GI, y después de la respuesta motora adecuada, se inyectaron 30 mL de levopubivacaina en exceso enantiomérico de un 50% al 0,33% con adrenalina 1:200.000. En el GS, y después de la respuesta motora del nervio supraescapular y axilar, se inyectaron 15 mL de la misma sustancia en cada nervio. Enseguida se realizó la anestesia general. Las variables que se evaluaron fueron: tiempo para la realización de los bloqueos, analgesia, consumo de opioide, bloqueo motor, estabilidad cardiocirculatoria, satisfacción y aceptabilidad por parte del paciente. RESULTADOS: El tiempo para la ejecución del bloqueo interescalénico fue significativamente menor que para la realización del bloqueo selectivo. La analgesia fue significativamente mayor en el postoperatorio inmediato en el GI y en el postoperatorio tardío en el GS. El consumo de morfina fue significativamente mayor en la primera hora en el GS. El bloqueo motor fue significativamente menor en el GS. La estabilidad cardiocirculatoria, satisfacción y aceptabilidad de la técnica por el paciente no fueron diferentes entre los grupos. Ocurrió un fallo en el GI y dos en el GS. CONCLUSIONES: Ambas técnicas son seguras y eficaces con el mismo grado de satisfacción y de aceptabilidad. El bloqueo selectivo de ambos nervios presentó una analgesia satisfactoria, con la ventaja de proporcionar un bloqueo motor restringido al hombro.BACKGROUND AND OBJECTIVE: Shoulder arthroscopic surgeries evolve with intense postoperative pain. Several analgesic techniques have been advocated. The aim of this study was to compare suprascapular

  8. Complicaciones mecánicas del infarto agudo de miocardio: aunque infrecuentes, potencialmente letales

    Directory of Open Access Journals (Sweden)

    Jerson Quitian Moreno

    2017-09-01

    Full Text Available Aunque la incidencia de complicaciones mecánicas en el infarto agudo de miocardio ha descendido después de la era de la intervención coronaria percutánea, la mortalidad sigue siendo significativa. La ruptura septal ventricular, la regurgitación mitral aguda y la ruptura de la pared libre del ventrículo izquierdo conforman el espectro de complicaciones mecánicas posteriores al infarto agudo de miocardio. La reparación quirúrgica es el pilar del tratamiento; sin embargo, como puente para la cirugía, el manejo médico permite estabilizar al paciente.

  9. FRACASO RENAL AGUDO EN EL PACIENTE ONCOLOGICO. ANALISIS CLINICO Y PRONOSTICO.

    Directory of Open Access Journals (Sweden)

    Purroy A,

    2004-01-01

    Full Text Available RESUMEN: El fracaso renal agudo es un problema frecuente en el paciente oncológico, que plantea limitaciones en el pronóstico y en el planteamiento terapeútico. El desarrollo de registros de pacientes oncológicos con fracaso renal agudo permite analizar el perfil clínico y plantear aspectos a desarrollar desde el punto de vista terapeútico y sobre todo preventivo. El empleo de determinados índices pronósticos como el ISI (Liaño o el de fallo multiorgánico permite evaluar mejor este perfil clínico. En nuestra experiencia el fracaso renal agudo en el paciente oncológico es una complicación frecuente y relacionada con el proceso de base. Mediante este registro de pacientes hemos identificado un perfil clínico de alto riesgo consistente en un paciente con un fallo renal asociado a un proceso infeccioso, con insuficiencia respiratoria, oligúrico y con una puntuación elevada de esos índices pronósticos.

  10. Síndromes coronarios agudos: epidemiología y diagnóstico

    Directory of Open Access Journals (Sweden)

    Carlos A. Cassiani M.

    2009-01-01

    Full Text Available Los síndromes coronarios agudos son un problema mayor de salud pública en todo el mundo. El síndrome coronario agudo (SCA incluye infarto agudo de miocardio (IAM, con o sin elevación del ST y la angina inestable. La incidencia anual de IAM es 565.000 nuevos eventos y 300.000 ataques recurrentes cada año. Los factores de riesgo para enfermedad cardíaca isquémica (ECI incluyen: tabaquismo, niveles elevados de lípidos séricos, hipertensión arterial, diabetes mellitus, obesidad mórbida, sedentarismo, bajo consumo diario de frutas y vegetales, consumo problemático de alcohol e índice psicosocial. La evaluación inicial de un SCA debe enfocarse en el disconfort toráxico, signos y síntomas asociados y factores de riesgo para SCA. Los marcadores biológicos de lesión miocárdica hoy no son fundamentales para decidir el manejo inicial, aunque han contribuido a una mayor sensibilidad del abordaje diagnóstico y aportan datos para el pronóstico de los pacientes.

  11. Angular momentum projected semiclassics

    International Nuclear Information System (INIS)

    Hasse, R.W.

    1986-10-01

    By using angular momentum projected plane waves as wave functions, we derive semiclassical expressions for the single-particle propagator, the partition function, the nonlocal density matrix, the single-particle density and the one particle- one hole level density for fixed angular momentum and fixed z-component or summed over the z-components. Other quantities can be deduced from the propagator. In coordinate space (r, r') the relevant quantities depend on vertical stroker - r 3 vertical stroke instead of vertical stroker - r'vertical stroke and in Wigner space (R, P) they become proportional to the angular momentum constraints δ(vertical strokeRxPvertical stroke/ℎ - l) and δ((RxP) z /ℎ - m). As applications we calculate the single-particle and one particle- one hole level densities for harmonic oscillator and Hill-Wheeler box potentials and the imaginary part of the optical potential and its volume integral with an underlying harmonic oscillator potential and a zero range two-body interaction. (orig.)

  12. Optical angular momentum and atoms.

    Science.gov (United States)

    Franke-Arnold, Sonja

    2017-02-28

    Any coherent interaction of light and atoms needs to conserve energy, linear momentum and angular momentum. What happens to an atom's angular momentum if it encounters light that carries orbital angular momentum (OAM)? This is a particularly intriguing question as the angular momentum of atoms is quantized, incorporating the intrinsic spin angular momentum of the individual electrons as well as the OAM associated with their spatial distribution. In addition, a mechanical angular momentum can arise from the rotation of the entire atom, which for very cold atoms is also quantized. Atoms therefore allow us to probe and access the quantum properties of light's OAM, aiding our fundamental understanding of light-matter interactions, and moreover, allowing us to construct OAM-based applications, including quantum memories, frequency converters for shaped light and OAM-based sensors.This article is part of the themed issue 'Optical orbital angular momentum'. © 2017 The Author(s).

  13. Optical angular momentum and atoms

    Science.gov (United States)

    2017-01-01

    Any coherent interaction of light and atoms needs to conserve energy, linear momentum and angular momentum. What happens to an atom’s angular momentum if it encounters light that carries orbital angular momentum (OAM)? This is a particularly intriguing question as the angular momentum of atoms is quantized, incorporating the intrinsic spin angular momentum of the individual electrons as well as the OAM associated with their spatial distribution. In addition, a mechanical angular momentum can arise from the rotation of the entire atom, which for very cold atoms is also quantized. Atoms therefore allow us to probe and access the quantum properties of light’s OAM, aiding our fundamental understanding of light–matter interactions, and moreover, allowing us to construct OAM-based applications, including quantum memories, frequency converters for shaped light and OAM-based sensors. This article is part of the themed issue ‘Optical orbital angular momentum’. PMID:28069766

  14. AngularJS directives

    CERN Document Server

    Vanston, Alex

    2013-01-01

    This book uses a practical, step-by-step approach, starting with how to build directives from the ground up before moving on to creating web applications comprised of multiple modules all working together to provide the best user experience possible.This book is intended for intermediate JavaScript developers who are looking to enhance their understanding of single-page web application development with a focus on AngularJS and the JavaScript MVC frameworks.It is expected that readers will understand basic JavaScript patterns and idioms and can recognize JSON formatted data.

  15. Aplicación de las escalas de estratificación del riesgo en el diagnóstico de los síndromes coronarios agudos

    Directory of Open Access Journals (Sweden)

    John Jaime Sprockel Díaz

    2017-09-01

    Conclusiones: En una población de pacientes con alta probabilidad para el síndrome coronario agudo, las escalas HEART y TIMI mostraron una mayor capacidad para discriminar el diagnóstico del síndrome coronario agudo.

  16. Angular Distribution of GRBs

    Directory of Open Access Journals (Sweden)

    L. G. Balázs

    2012-01-01

    Full Text Available We studied the complete randomness of the angular distribution of BATSE gamma-ray bursts (GRBs. Based on their durations and peak fluxes, we divided the BATSE sample into 5 subsamples (short1, short2, intermediate, long1, long2 and studied the angular distributions separately. We used three methods to search for non-randomness in the subsamples: Voronoi tesselation, minimal spanning tree, and multifractal spectra. To study any non-randomness in the subsamples we defined 13 test-variables (9 from Voronoi tesselation, 3 from the minimal spanning tree and one from the multifractal spectrum. We made Monte Carlo simulations taking into account the BATSE’s sky-exposure function. We tested therandomness by introducing squared Euclidean distances in the parameter space of the test-variables. We recognized that the short1, short2 groups deviate significantly (99.90%, 99.98% from the fully random case in the distribution of the squared Euclidean distances but this is not true for the long samples. In the intermediate group, the squared Euclidean distances also give significant deviation (98.51%.

  17. Perturbed angular correlation

    International Nuclear Information System (INIS)

    Fabris, J.D.

    1977-01-01

    The electric quadrupolar interaction in some hafnium complexes, measured at the metal nucleus level is studied. For that purpose, the technique of γ-γ perturbed angular correlation is used: the frequencies of quadrupolar interaction are compared with some hafnium α-hydroxicarboxilates, namely glycolate, lactate, mandelate and benzylate; the influence of the temperature on the quadrupolar coupling on the hafnium tetramandelate is studied; finally, the effects associated with the capture of thermal neutrons by hafnium tetramandelate are examined locally at the nuclear level. The first group of results shows significant differences in a series of complexes derived from glycolic acid. On the other hand, the substitution of the protons in hafnium tetramandelate structure by some alkaline cations permits to verify a correlation between the variations in the quadrupolar coupling and the electronegativities of the substituent elements. Measurements at high temperatures show that this complex is thermally stable at 100 and 150 0 C. It is possible to see the appearance of two distinct sites for the probe nucleus, after heating the sample at 100 0 C for prolonged time. This fact is attributed to a probable interconversion among the postulated structural isomers for the octacoordinated compounds. Finally, measurements of angular correlation on the irradiated complex show that there is an effective destruction of the target molecule by neutron capture [pt

  18. Galaxy angular momentum

    International Nuclear Information System (INIS)

    Thompson, L.A.

    1974-01-01

    In order to test the theories which purport to explain the origin of galaxy angular momentum, this study presents new data for about 1000 individual galaxies in eight rich clusters. The clusters which are studied include Virgo, A 119, A 400, A 1656 (Coma), A 2147, A 2151 (Hercules), A 2197, and A 2199. Selected samples of these data are used to investigate systematic alignment effects in clusters of galaxies and to investigate the intrinsic ellipticities of E, SO, and spiral galaxies. The following new results are reported: Galaxies in the cluster A 2197 show a significant alignment effect (chi 2 probability less than 0.0002), and the preferential direction of alignment corresponds approximately to the major axis of the overall cluster elongation. None of the other seven clusters show any significant alignment trends. The spiral galaxy samples in four clusters (Virgo, A 1656, A 2151, and A 2197) were large enough to analyze the number distributions of forward and reverse winding spirals. Large and small spiral galaxies have identical ellipticity distributions. Large E and SO galaxies tend to be more spherical, and small E and SO galaxies more flattened. The intrinsic ellipticities of E, SO, and spiral galaxies are the same for galaxies in the ''field'' and for galaxies in rich clusters. Six models of galaxy formation are reviewed, and the major []mphasis is placed on how each model explains the origin of galaxy angular momentum. (Diss. Abstr. Int., B)

  19. Frecuencia de infección por VIH en pacientes con episodio agudo de herpes zoster

    Directory of Open Access Journals (Sweden)

    Susana Lazarte Heraud

    2005-01-01

    Full Text Available Objetivo: Evaluar la frecuencia de infección por VIH en pacientes que consultan por episodio agudo de herpes zoster. Material y Métodos: Se incluyeron a todos los pacientes entre 18 y 49 años, atendidos entre setiembre del 2001 y enero del 2003 en el Departamento de Enfermedades Infecciosas, Tropicales y Dermatológicas del Hospital Nacional Cayetano Heredia, por un cuadro agudo de herpes zoster, diagnosticado clínicamente. Los criterios de inclusión fueron: status VIH desconocido tanto del paciente como de su pareja; que no presentaran alguna complicación neurológica o presentación atípica de zoster y que no tuvieran signos ni síntomas compatibles con infección por VIH (muguet oral, diarrea crónica, síndrome de desgaste, etc.. Previa firma de consentimiento informado, se tomó muestra de sangre para prueba de ELISA para VIH1. A todos los pacientes con resultado positivo se les realizó western blot. Resultados: Veintiún pacientes cumplieron los criterios del estudio, 14 varones y 7 mujeres. Cinco pacientes (23,8% fueron VIH positivos. De éstos, 4 fueron varones (4/14 y 1 mujer (1/7. No se encontró diferencias significativas en cuanto a la conducta sexual de riesgo. Conclusiones: Se encuentra un porcentaje elevado de infección por VIH en adultos jóvenes que consultan en un hospital general por un cuadro agudo de herpes zoster, sin ningún otro signo ni síntoma de inmunosupresión, independientemente de conductas sexuales de riesgo. Nuestro hallazgo justifica un despistaje de VIH en adultos jóvenes con herpes zoster.

  20. Angular mining conveyor

    Energy Technology Data Exchange (ETDEWEB)

    Sender, A; Mura, A; Liduchowski, L; Zok, P; Skolik, W; Szyngiel, S; Rojek, H; Gajda, B; Major, M; Stanislawski, P; Sliwiok, H; Sikora, J

    1988-10-19

    Angular mining conveyor provided with a drag chain extending along the axis of its path of movement, and a corner member, inside which the drag chain is led in a forced way, characterized in that the drag chain, where its path curves around the corner member, is located by supporting of the vertical links of the chain along the required curved section of the conveyor path around said corner member, and the supporting line of the links is so chosen, that, within the said curved section of the conveyor path, a space is maintained between the vertical end surface of the scrapers and the outer curved surface of the radially inner side wall of a corner trough associated with the corner member, through which corner trough the scrapers pass. 10 figs.

  1. Diagnóstico por imagem do tromboembolismo pulmonar agudo Imaging of acute pulmonary thromboembolism

    Directory of Open Access Journals (Sweden)

    C. Isabela S. Silva

    2004-10-01

    Full Text Available O diagnóstico do tromboembolismo pulmonar agudo é baseado na probabilidade clínica, uso do dímero D (quando disponível e na avaliação por imagem. Os principais métodos de imagem utilizados no diagnóstico são representados por cintilografia ventilação-perfusão, angiografia pulmonar e tomografia computadorizada (TC. Na última década vários estudos têm demonstrado que a TC espiral apresenta elevada sensibilidade e especificidade no diagnóstico de tromboembolismo pulmonar agudo. Uma melhor avaliação das artérias pulmonares tornou-se possível com a recente introdução dos equipamentos de TC espirais com multidetectores. Vários pesquisadores têm sugerido que a angiografia pulmonar por TC espiral deve substituir a cintilografia na avaliação de pacientes com suspeita clinica de tromboembolismo pulmonar agudo. Os autores discutem os principais métodos de imagem utilizados no diagnóstico de tromboembolismo pulmonar agudo enfatizando o papel da TC espiral.The diagnosis of acute pulmonary thromboembolism is based on the clinical probability, use of D-dimer (when available and imaging. The main imaging modalities used in the diagnosis are ventilation-perfusion (V/Q, scintigraphy, angiography, and computed tomography (CT. In the last decade several studies have demonstrated that spiral CT has a high sensitivity and specificity in the diagnosis of acute pulmonary thromboembolism. The evaluation of the pulmonary arteries has further improved with the recent introduction of multidetector spiral CT scanners. Various investigators have suggested that spiral CT pulmonary angiography should replace scintigraphy in the assessment of patients whose symptoms are suggestive of acute PE. This article discusses the role of the various imaging modalities in the diagnosis of acute pulmonary thromboembolism with emphasis on the role of spiral CT.

  2. Agentes trombolíticos en el infarto agudo del miocardio

    OpenAIRE

    Manuel Cué Brugueras

    1995-01-01

    Se presenta un revisión bibliográfica sobre los agentes trombolíticos y su uso en el infarto agudo del miocardio con el objetivo de actualizar a los farmacéuticos y otros profesionales de la salud en la terapéutica de este importante problema de salud a nivel internacional. Se revisaron las bases de datos MEDLINE (1985-9/1994), Excerpta Medica (1985-1993), Internacional Pharmaceutical Abstracts (1970-9/1993) y Predicast (1992-11/1993). En la revisión se abordan los beneficios y riesgos de la ...

  3. El infarto agudo de miocardio, un problema de salud pública

    OpenAIRE

    Caccavo, Alberto

    2010-01-01

    El infarto agudo de miocardio (IAM) es una causa importante de muerte en la Argentina. La mortalidad intrahospitalaria del IAM en la actualidad es de aproximadamente el 10%, al menos en los centros que participan en registros. Su tratamiento está orientado a la reperfusión de la arteria ocluida con angioplastia primaria o trombolíticos. Sin embargo, sólo un pequeño número de hospitales disponen de angioplastia primaria y reciben trombolíticos muchos menos pacientes que los que los requieren. ...

  4. El infarto agudo de miocardio, un problema de salud pública

    OpenAIRE

    Alberto Caccavo

    2010-01-01

    RESUMENEl infarto agudo de miocardio (IAM) es una causa importante de muerte en la Argentina. Lamortalidad intrahospitalaria del IAM en la actualidad es de aproximadamente el 10%, almenos en los centros que participan en registros.Su tratamiento está orientado a la reperfusión de la arteria ocluida con angioplastia primariao trombolíticos. Sin embargo, sólo un pequeño número de hospitales disponen deangioplastia primaria y reciben trombolíticos muchos menos pacientes que los que los requieren...

  5. Factores relacionados con la mortalidad intrahospitalaria en el infarto agudo del miocardio

    Directory of Open Access Journals (Sweden)

    Yanier Coll Muñoz

    2012-09-01

    Full Text Available Fundamento: la identificación de los factores relacionados con la mortalidad en el infarto agudo del miocardio representa un eslabón primordial en la evaluación inicial de los pacientes. Objetivo: identificar los factores relacionados con la mortalidad intrahospitalaria de los pacientes con infarto agudo del miocardio, ingresados en la Unidad de Cuidados Intensivos Coronarios de Cienfuegos durante el año 2010. Método: se realizó un estudio de serie de casos, que incluyó 241 pacientes con diagnóstico de infarto agudo del miocardio, ingresados en la Unidad de Cuidados Intensivos Coronarios del Hospital General Universitario Dr. Gustavo Aldereguía Lima de Cienfuegos, en el año 2010. Las variables que se analizaron fueron: edad, sexo, antecedentes patológicos personales, tipo de infarto agudo del miocardio (según electrocardiograma y localización topográfica, frecuencia cardiaca y tensión arterial al ingreso, clasificación de la insuficiencia cardiaca según Killip Kimball, creatinina, glicemia, colesterol total, triglicéridos, CPK-MB, y eventos adversos cardiovasculares durante su estadía hospitalaria. Resultados: la edad media de los pacientes estudiados fue de 65,6 años, con predominio del sexo masculino. La hipertensión arterial, el tabaquismo y el infarto miocárdico previo fueron los antecedentes de mayor interés, predominan los pacientes sin insuficiencia cardiaca y fracción de eyección conservada. Los eventos adversos cardiovasculares más frecuentes fueron: la angina post-infarto, arritmias ventriculares malignas y el choque cardiogénico. Conclusiones: se encontró relación significativa con la mortalidad para la edad avanzada (>70 años, taquicardia, glicemia ≥7 mmol/l al ingreso, y la presentación de arritmias ventriculares y choque cardiogénico durante la evolución intrahospitalaria.

  6. Abdomen agudo ocasionado por apendicitis aguda de probable origen tuberculoso. Informe de un caso

    OpenAIRE

    Montiel-Jarquín, Álvaro José; Alvarado-Ortega, Iván; Romero-Figueroa, María del Socorro; Rodríguez-Pérez, Fabiola; Rodríguez-Lima, Felipe; Loria-Castellanos, Jorge

    2017-01-01

    RESUMEN Antecedentes: la apendicitis aguda tuberculosa es una enfermedad rara, constituye de 0,001 % a 0,01 % de las formas clínicas de tuberculosis. Se presenta un caso de apendicitis aguda probablemente tuberculosa como causa de abdomen agudo quirúrgico. Caso clínico: hombre de 29 años con cuadro de dolor abdominal leve a moderado que se intensificó y localizó en el hemiabdomen derecho, claudicación, febrícula, vómito, mal estado general, leucocitosis de 11 300/µL y neutrofilia de 91 %....

  7. INFARTO AGUDO DO MIOCÁRDIO: MANUAL DE ORIENTAÇÃO PARA O PACIENTE

    Directory of Open Access Journals (Sweden)

    Fernanda Carneiro Mussi

    Full Text Available Baseado em pesquisa das expectativas de 30 pacientes internados em unidade coronária, os autores apresentam um manual de orientação para o paciente com diagnóstico de Infarto Agudo do Miocárdio. O objetivo do manual é ser um complemento do tratamento dos pacientes com Infarto do Miocárdio, a principal causa de morte em nosso pais. É composto por informações sobre o que é a doença, os fatores de risco a ela associados, retorno as atividades e tratamento.

  8. Validez y confiabilidad de un instrumento de satisfacción del usuario con síndrome febril agudo

    OpenAIRE

    Tiga-Loza, Diana C; Villar-Centeno, Luis á; Güiza-Sanabria, Diana R; Martínez-Vega, Ruth A

    2010-01-01

    Objetivo Determinar la validez y la confiabilidad de un instrumento de satisfacción del paciente con Síndrome Febril Agudo en urgencias y consulta oportuna de la Red Pública de Bucaramanga. Métodos Estudio de evaluación de tecnologías diagnósticas en personas con Síndrome Febril Agudo entre el 2008 y 2009. Se diseñó un cuestionario telefónico a partir de 3 instrumentos en español. Se evaluó validez de contenido mediante sometimiento a expertos y a profesionales de salud y validez facial en un...

  9. Eficacia de la asociación paracetamol-metamizol vs. paracetamol-dexketoprofeno en manejo de dolor agudo postoperatorio

    OpenAIRE

    García Ramiro, M.; Alonso Guardo, L.; Matilla Álvarez, A.; Bartol Sevillano, R.; Vaquero Roncero, L. M.; Muriel Villoria, C.

    2013-01-01

    Objetivo: El uso de fármacos con mecanismos diferentes combinados entre sí para el tratamiento del dolor, en concreto del dolor agudo postoperatorio, forma parte fundamental de un tipo de analgesia llamada multimodal. El objetivo de este trabajo es evaluar la eficacia de la asociación de paracetamol más metamizol y compararla con la asociación de paracetamol más dexketoprofeno en dolor agudo postoperatorio. Métodos: Diseñamos un estudio prospectivo de intervención en el que se incluyeron 42 p...

  10. Hiperglucemia en el síndrome coronario agudo: informe científico multidisciplinario

    Directory of Open Access Journals (Sweden)

    Patricia Blanco

    2012-04-01

    Full Text Available La hiperglucemia con o sin diabetes preexistente es un hallazgo frecuente en pacientes que cursan un síndrome coronario agudo. Estudios previos han demostrado que la hiperglucemia es altamente prevalente y se asocia a un mayor riesgo de muerte y complicaciones hospitalarias. Los mecanismos fisiopatológicos mediante los cuales la hiperglucemia provoca resultados adversos no son claros, y se desconoce si es un marcador de eventos o su causa. Los efectos perjudiciales de la hiperglucemia en el sistema cardiovascular son múltiples, y el control de los niveles de glucosa con insulina parece mejorar el pronóstico en estos pacientes. Se han desarrollado numerosos protocolos para el control de glucemia que demostraron ser seguros y efectivos. En una iniciativa originada en el Consejo de Emergencias de la Sociedad Argentina de Cardiología, se convocó a expertos de nuestro medio con el propósito de debatir estrategias para el control de la glucemia en pacientes que cursan un síndrome coronario agudo. Este documento refleja lo discutido en este evento académico con la intención de resumir los principales aspectos del control de la glucemia y ofrecer recomendaciones generales de tratamiento en la Unidad Coronaria.

  11. Angular integrals in d dimensions

    Energy Technology Data Exchange (ETDEWEB)

    Somogyi, Gabor

    2011-01-15

    We discuss the evaluation of certain d dimensional angular integrals which arise in perturbative field theory calculations. We find that the angular integral with n denominators can be computed in terms of a certain special function, the so-called H-function of several variables. We also present several illustrative examples of the general result and briefly consider some applications. (orig.)

  12. Angular momentum in general relativity

    International Nuclear Information System (INIS)

    Cresswell, A.; Zimmerman, R.L.; Oregon Univ., Eugene

    1986-01-01

    It is argued that the correct expressions for the angular momentum flux carried by gravitational radiation should follow directly from the momentum currents. Following this approach, the authors compute the angular momentum associated with several different choices of energy-momentum prescriptions. (author)

  13. Angular integrals in d dimensions.

    OpenAIRE

    Somogyi, G.

    2011-01-01

    We discuss the evaluation of certain d dimensional angular integrals which arise in perturbative field theory calculations. We find that the angular integral with n denominators can be computed in terms of a certain special function, the so-called H-function of several variables. We also present several illustrative examples of the general result and briefly consider some applications.

  14. Angular integrals in d dimensions

    International Nuclear Information System (INIS)

    Somogyi, Gabor

    2011-01-01

    We discuss the evaluation of certain d-dimensional angular integrals which arise in perturbative field theory calculations. We find that the angular integral with n denominators can be computed in terms of a certain special function, the so-called H-function of several variables. We also present several illustrative examples of the general result and briefly consider some applications.

  15. Angular integrals in d dimensions

    Science.gov (United States)

    Somogyi, Gábor

    2011-08-01

    We discuss the evaluation of certain d-dimensional angular integrals which arise in perturbative field theory calculations. We find that the angular integral with n denominators can be computed in terms of a certain special function, the so-called H-function of several variables. We also present several illustrative examples of the general result and briefly consider some applications.

  16. Angular integrals in d dimensions

    International Nuclear Information System (INIS)

    Somogyi, Gabor

    2011-01-01

    We discuss the evaluation of certain d dimensional angular integrals which arise in perturbative field theory calculations. We find that the angular integral with n denominators can be computed in terms of a certain special function, the so-called H-function of several variables. We also present several illustrative examples of the general result and briefly consider some applications. (orig.)

  17. Angular Momentum in Dwarf Galaxies

    Directory of Open Access Journals (Sweden)

    Del Popolo A.

    2014-06-01

    Full Text Available We study the “angular momentum catastrophe” in the framework of interaction among baryons and dark matter through dynamical friction. By means of Del Popolo (2009 model we simulate 14 galaxies similar to those investigated by van den Bosch, Burkert and Swaters (2001, and calculate the distribution of their spin parameters and the angular momenta. Our model gives the angular momentum distribution which is in agreement with the van den Bosch et al. observations. Our result shows that the “angular momentum catastrophe” can be naturally solved in a model that takes into account the baryonic physics and the exchange of energy and angular momentum between the baryonic clumps and dark matter through dynamical friction.

  18. Angular momentum of dwarf galaxies

    Science.gov (United States)

    Kurapati, Sushma; Chengalur, Jayaram N.; Pustilnik, Simon; Kamphuis, Peter

    2018-05-01

    Mass and specific angular momentum are two fundamental physical parameters of galaxies. We present measurements of the baryonic mass and specific angular momentum of 11 void dwarf galaxies derived from neutral hydrogen (HI) synthesis data. Rotation curves were measured using 3D and 2D tilted ring fitting routines, and the derived curves generally overlap within the error bars, except in the central regions where, as expected, the 3D routines give steeper curves. The specific angular momentum of void dwarfs is found to be high compared to an extrapolation of the trends seen for higher mass bulge-less spirals, but comparable to that of other dwarf irregular galaxies that lie outside of voids. As such, our data show no evidence for a dependence of the specific angular momentum on the large scale environment. Combining our data with the data from the literature, we find a baryonic threshold of ˜109.1 M⊙ for this increase in specific angular momentum. Interestingly, this threshold is very similar to the mass threshold below which the galaxy discs start to become systematically thicker. This provides qualitative support to the suggestion that the thickening of the discs, as well as the increase in specific angular momentum, are both results of a common physical mechanism, such as feedback from star formation. Quantitatively, however, the amount of star formation observed in our dwarfs appears insufficient to produce the observed increase in specific angular momentum. It is hence likely that other processes, such as cold accretion of high angular momentum gas, also play a role in increasing the specific angular momentum.

  19. AngularJS testing cookbook

    CERN Document Server

    Bailey, Simon

    2015-01-01

    This book is intended for developers who have an understanding of the basic principles behind both AngularJS and test-driven development. You, as a developer, are interested in eliminating the fear related to either introducing tests to an existing codebase or starting out testing on a fresh AngularJS application. If you're a team leader or part of a QA team with the responsibility of ensuring full test coverage of an application, then this book is ideal for you to comprehend the full testing scope required by your developers. Whether you're new to or are well versed with AngularJS, this book

  20. Modelos de serviços hospitalares para casos agudos em idosos

    Directory of Open Access Journals (Sweden)

    Coelho Filho João Macedo

    2000-01-01

    Full Text Available Embora a atenção ao idoso seja uma prioridade emergente no Brasil, pouca ênfase tem sido dada a modelos de organização de serviços hospitalares para pacientes geriátricos. São revisados modelos de serviços hospitalares para admissão e manuseio de casos agudos em idosos, com ênfase na discussão sobre o papel e o posicionamento da medicina geriátrica (incluindo sua interface com especialidades e com a clínica médica no âmbito da atenção hospitalar. Foi realizada pesquisa na base de dados Medline (1989-1999, bem como nos principais livros-texto de geriatria e de gerontologia, buscando identificar descrições de serviços hospitalares para cuidado agudo de pacientes idosos. As características dos modelos identificados foram compiladas e descritas à luz de sua adequação à realidade dos serviços de saúde no Brasil. Exemplos de intervenções em geriatria, com efetividade demonstrada através de revisões sistemáticas, foram também citadas. Os modelos mais freqüentemente relatados foram cuidado prolongado, tradicional, baseado na idade cronológica, não especializado e integrado. Adaptações e variantes de alguns desses modelos foram freqüentemente relatadas, assim como seu impacto potencial na efetividade do cuidado geriátrico. Evidências sobre o melhor modelo a seguir não foram identificadas, mas aqueles modelos favorecendo a integração da geriatria com a clínica geral pareceram mais adequados à nossa realidade. Ressalta a necessidade de reestruturação de serviços de saúde para responder às novas demandas que surgem com o envelhecimento da população, bem como do delineamento de serviços hospitalares para casos agudos, importantes para a efetividade do cuidado geriátrico e que devem ser objeto de maior debate e pesquisa no Brasil.

  1. Angular momentum from tidal torques

    International Nuclear Information System (INIS)

    Barnes, J.; Efstathiou, G.; Cambridge Univ., England)

    1987-01-01

    The origin of the angular momentum of bound objects in large N-body simulations is studied using three sets of models. One model with white-noise initial conditions is analyzed as well as two in which the initial conditions have more power on large scales, as predicted in models with cold dark matter. The growth and distribution of angular momentum in individual objects is studied and it is found that the specific angular momentum distribution of bound clumps increases in a near linear fashion with radius while the orientation of the angular momentum in the inner high-density regions is often poorly correlated with that of the outer parts. It is also found that the dimensionless spin parameter is insensitive to the initial perturbation spectrum and has a median value of about 0.05. 61 references

  2. Lidar Orbital Angular Momentum Sensor

    Data.gov (United States)

    National Aeronautics and Space Administration — The recognition in recent decades that electromagnetic fields have angular momentum (AM) in the form of not only polarization (or spin AM) but also orbital (OAM) has...

  3. EVOLUCIÓN DE FENÓMENOS BÁSICOS DE APRENDIZAJE EN TAREAS DE MEMORIA ESPACIAL: BLOQUEO, ENSOMBRECIMIENTO E INHIBICIÓN LATENTE EN ANFIBIOS

    Directory of Open Access Journals (Sweden)

    MARÍA FLORENCIA DANERI

    2015-01-01

    Full Text Available En este artículo se describen desde una perspectiva comparativa los fenómenos de bloqueo, ensombrecimiento e inhibición latente, enfatizando su presencia en tareas de aprendizaje espacial. Estos fenómenos de aprendizaje, ampliamente observados en otras clases de vertebrados e invertebrados, han sido recientemente descriptos por primera vez en anfibios, un grupo de vertebrados con un cerebro filogenéticamente antiguo. Tomando como modelo al sapo terrestre Rhinella arenarum, se revisarán los tres fenómenos de aprendizaje asociativo mencionados en una situación de aprendizaje espacial: (1 bloqueo entre claves visuales asociadas a una meta, (2 ensombrecimiento de una clave visual lejana por la presencia de una clave cercana y (3 inhibición latente debida a la pre-exposición a una cla ve visual. Todos los entrenamientos se llevaron a cabo en una arena circular de color blanco, utilizando agua como recompensa. Dentro de la arena, se distribuyeron cuatro piletas de acrílico en forma de cruz contra las paredes laterales (sólo una tenía acceso a la recompensa. En las paredes interiores de la arena circular se colocaron varias señales visuales para guiar a los animales. Los resultados obtenidos en sapos indican que estos fenómenos, observados previamente en aves y mamíferos, también se encuentran en este grupo (uti lizando un paradigma de aprendizaje espacial con claves visuales cercanas y lejanas. Este primer registro en anfibios sugiere que los mecanismos biológicos de estos fenómenos de aprendizaje han surgido muy tempranamente en el curso de la evolución de los vertebrados totalmente terrestres y que los mismos han sido fuertemente conservados. El análisis comparado de estos hallazgos contribuirá a mejorar el entendimiento de los mecanismos biológicos que subyacen al aprendizaje espacial, en busca de patrones funcionales comunes con otras clases de vertebrados y potencialmente presentes en un ancestro común.

  4. Tratamiento del adulto mayor con síndrome coronario agudo

    Directory of Open Access Journals (Sweden)

    Carolina Pemberthy-López

    2016-11-01

    Full Text Available El adulto mayor se encuentra en una etapa de la vida con cambios fisiológicos importantes que posee repercusiones directas e indirectas sobre su estado clínico, es así como el enfoque diagnóstico y terapéutico de sus patologías debe ser abordado desde una perspectiva diferente, con consideraciones especiales para este grupo poblacional. Lamentablemente, este grupo no ha sido bien representado en los diferentes estudios y por tanto, es mucho lo que desconocemos; su comportamiento y la eficacia de las distintas terapias no están bien establecidos. Teniendo de referencia el síndrome coronario agudo como principal causa de mortalidad en pacientes mayores de 65 años de edad, abordaremos esta entidad desde la evidencia que nos aportan algunos de los registros más importantes al respecto en adultos mayores.

  5. Hepatocarcinoma como causa de abdome agudo em adolescente: relato de caso

    Directory of Open Access Journals (Sweden)

    João Augusto dos Santos Martines

    2012-08-01

    Full Text Available O carcinoma hepatocelular (CHC é pouco prevalente nos países ocidentais, porém é um dos tumores mais freqüentes na Ásia e a quinta causa de câncer no mundo.É relatado um caso de adolescente do sexo feminino sem fatores de risco para um tumor extremamente agressivo, internada no Hospital Universitário da Universidade de São Paulo. A apresentação clínica foi de abdome agudo secundário a sangramento para cavidade peritoneal por ruptura do tumor evidenciado através de tomografia computorizada multidetectores (TCMD confirmado por laparotomia exploradora e biópsia hepática e tratada com rafia hemostática do parênquima hepático.

  6. Variabilidad geográfica de las hospitalizaciones por infarto agudo al miocardio en Costa Rica

    Directory of Open Access Journals (Sweden)

    Melvin Morera Salas

    2014-01-01

    Full Text Available La presente investigación muestra los patrones geográficos de las hospitalizaciones por infarto agudo al miocardio en el seguro público de salud de Costa Rica en el trienio 2010-2012. Para el análisis geográfico por área de salud se utiliza un modelo bayesiano jerárquico espacial. Se estiman razones estandarizadas suavizadas y, como medida de precisión, la probabilidad de que cada área de salud registre un riesgo de hospitalización estadísticamente diferente al promedio nacional. En la determinación de presencia de autocorrelación espacial se utiliza el indicador de la I de Moran. La amplitud entre las variaciones observadas se estima mediante la razón interpercentil (percentil 95/percentil 5 y el coeficiente de variación. La tasa bruta de hospitalizaciones es de 5,8 por 10 mil habitantes en hombres y 2,6 / 10 mil en mujeres. Se registra un rango de variación de más de dos veces en las hospitalizaciones entre las áreas con mayores y menores egresos. Se presenta un patrón de bajas tasas de hospitalizaciones por infarto agudo al miocardio en áreas de salud fuera del Área Metropolitana, donde se encuentran los hospitales nacionales de mayor complejidad. Este elemento podría estar asociado a dificultades en el acceso de los servicios de hospitalización.

  7. Estreptoquinasa recombinante en pacientes con infarto agudo del miocardio. Cardiocentro de Camaguey, 2008

    Directory of Open Access Journals (Sweden)

    Héctor Mariño Cano

    2015-12-01

    Full Text Available Se realizó un estudio descriptivo longitudinal, con el objetivo de valorar la eficacia de la utilización de la Estreptoquinasa Recombinante en pacientes con Infarto Agudo de Miocardio (IMA en el Cardiocentro del Hospital Provincial Docente “Manuel Ascunce Doménech” en la provincia de Camagüey, en el período comprendido de enero a diciembre del 2008. El universo estuvo constituido por 200 pacientes, a los que se les diagnosticó Infarto Agudo de Miocardio y la muestra quedó formada por 80 pacientes que recibieron tratamiento trombolítico, las historias clínicas de los pacientes fueron la principal fuente de obtención de la información, utilizando  las  siguientes  variables: resultados criterio de perfusión, evolución clínica, criterio de reacciones adversas y la influencia que ejerce el tiempo puerta-aguja,  así como los cuidados de enfermería. Al terminar se observó que  el criterio de repercusión de mayor incidencia fue el eléctrico; la mayor cantidad de pacientes tuvieron buena evolución clínica; la hipotensión fue la reacción adversa más frecuente; el tiempo de puerta-aguja  que más incidió  fue el menor, de 3h; a todos los pacientes diagnosticados con infarto, que recibieron tratamiento trombolítico, se les  brindaron  cuidados de enfermería.

  8. Uncertainty principle for angular position and angular momentum

    International Nuclear Information System (INIS)

    Franke-Arnold, Sonja; Barnett, Stephen M; Yao, Eric; Leach, Jonathan; Courtial, Johannes; Padgett, Miles

    2004-01-01

    The uncertainty principle places fundamental limits on the accuracy with which we are able to measure the values of different physical quantities (Heisenberg 1949 The Physical Principles of the Quantum Theory (New York: Dover); Robertson 1929 Phys. Rev. 34 127). This has profound effects not only on the microscopic but also on the macroscopic level of physical systems. The most familiar form of the uncertainty principle relates the uncertainties in position and linear momentum. Other manifestations include those relating uncertainty in energy to uncertainty in time duration, phase of an electromagnetic field to photon number and angular position to angular momentum (Vaccaro and Pegg 1990 J. Mod. Opt. 37 17; Barnett and Pegg 1990 Phys. Rev. A 41 3427). In this paper, we report the first observation of the last of these uncertainty relations and derive the associated states that satisfy the equality in the uncertainty relation. We confirm the form of these states by detailed measurement of the angular momentum of a light beam after passage through an appropriate angular aperture. The angular uncertainty principle applies to all physical systems and is particularly important for systems with cylindrical symmetry

  9. Bloqueo mediático, redes sociales y malestar ciudadano. Para entender el movimiento español del 15-M

    Directory of Open Access Journals (Sweden)

    Xosé Ramón Rodríguez-Polo

    2013-01-01

    Full Text Available El movimiento del 15-M ha sido la movilización más importante que ha vivido España en los últimos años. En este trabajo proponemos analizar este fenómeno mediante el estudio de cuatro elementos que consideramos que presentan las claves para entender algunas de sus causas y el enorme respaldo social que alcanzó. Empleando el análisis secundario de datos abordamos el estudio de la situación de bloqueo del debate público, la incidencia política que facilitan los medios sociales, los colectivos activistas y el descontento de la ciudadanía española. Del análisis de la opinión pública se colige que el problema económico de la crisis derivó, por causa de su gestión, en un problema social, para transformarse finalmente en un problema político, manifestado en un clima de enorme descontento con la situación política y con el gobierno. La irrupción del 15-M hizo aflorar todo el malestar acumulado, convirtiendo un acto organizado por colectivos minoritarios en toda una marea ciudadana de repulsa.

  10. Bloqueo aurículo-ventricular de primer grado en tirotoxicosis aguda First degree atrio-ventricular block in acute thyrotoxicosis

    Directory of Open Access Journals (Sweden)

    Antonio R. Vilches

    2004-02-01

    Full Text Available El cuadro clínico de la tirotoxicosis incluye síntomas cardiovasculares variados. La taquicardia sinusal es el trastorno electrocardiográfico más frecuente y los trastornos de conducción son extremadamente raros como modo de presentación. Comunicamos un caso de bloqueo aurículo-ventricular de primer grado en una paciente con hipertiroidismo recién diagnosticado y que comenzó días antes de la consulta con un cuadro general inespecífico. Su evaluación ulterior demostró que se trataba de una tirotoxicosis aguda autoinmune, y su tratamiento con metimazol corrigió el trastorno totalmente. Se discuten los mecanismos fisiopatológicos involucrados y las implicancias clínicas desde el punto de vista del internista.Thyrotoxicosis may present with a variety of cardiovascular symptoms. Sinus tachycardia is the most frequently encountered electrocardiographic abnormality and conduction disturbances are extremely uncommon. We present a case of first degree atrio-ventricular block in a patient with newly diagnosed hyperthyroidism and discuss the underlying pathophysiological mechanisms and the clinical implications from the internist’s standpoint.

  11. La toma de decisiones en baloncesto. Una propuesta de árboles decisionales para la enseñanza del bloqueo directo

    Directory of Open Access Journals (Sweden)

    Ernesto Suárez-Cadenas

    Full Text Available Resumen El presente artículo tiene por objetivo clarificar conceptos relacionados con la toma de decisiones en el deporte y proponer su aplicación para la enseñanza-aprendizaje del bloqueo directo (BD en baloncesto. Se realiza un repaso histórico hasta llegar a las teorías modernas de mayor vigencia en el ámbito deportivo. De la misma forma, se analiza el estado del arte actual de la enseñanza y aprendizaje de la toma de decisiones, mostrando las distintas ventajas e inconvenientes del uso de las estrategias de enseñanza intencional e incidental. Posteriormente, a partir de los conceptos revisados (reglas si-entonces y las distintas estrategias de enseñanza incidental e intencional, se establece una propuesta de entrenamiento del BD en baloncesto. A través de distintos árboles decisionales y de propuestas de tareas específicas se ha intentado resolver el problema de cómo potenciar la toma de decisiones de los jugadores durante el BD atendiendo a la lógica interna y a los principios del juego, pero intentando, a la vez, que los jugadores desarrollen una toma de decisiones propia, única e individual.

  12. Instant AngularJS starter

    CERN Document Server

    Menard, Dan

    2013-01-01

    Get to grips with a new technology, understand what it is and what it can do for you, and then get to work with the most important features and tasks. This book is written in an easytoread style, with a strong emphasis on realworld, practical examples. Stepbystep explanations are provided for performing important tasks.This book is for web developers familiar with JavascriptIt doesn't cover the history of AngularJS, and it's not a pitch to convince you that AngularJS is the best framework on the entire web. It's a guide to help you learn everything you need to know about AngularJS in as few pa

  13. Inestabilidad en múltiples placas ateroescleróticas en pacientes fallecidos por infarto agudo de miocardio

    Directory of Open Access Journals (Sweden)

    Ricardo A. Sarmiento

    2011-08-01

    Full Text Available Los procesos inflamatorios en los síndromes coronarios agudos juegan un rol importante en la inestabilidad de la placa ateroesclerótica. Nuestro objetivo fue evaluar la presencia y distribución de placas vulnerables e infiltrados inflamatorios en pacientes fallecidos por infarto agudo de miocardio y su comparación con los hallazgos en pacientes fallecidos por cuadros no coronarios. Se analizaron los estudios anatomopatológicos de corazón de 68 pacientes fallecidos por infarto agudo de miocardio y 15 fallecidos por causa no coronaria. Se registró la presencia de trombo, hemorragia intraplaca, ruptura endotelial e infiltrado inflamatorio. Al evaluar los pacientes fallecidos por IAM, encontramos trombo en 73.5% de las arterias responsables del IAM y en 28.7% de las no responsables (p < 0.0001. La hemorragia intraplaca se halló en el 70.5% de las arterias responsables y en 39.7% de las no responsables, p < 0.0001; ruptura endotelial en el 29.4% de las arterias responsables y en 3.7% de las no responsables, p < 0.0001. No encontramos diferencias en la presencia de infiltrado inflamatorio (76.5% versus 68.4%. Comparando con los fallecidos por causas no coronarias, la presencia de trombo fue significativamente superior (73.5% vs. 13.3%; p < 0.0001, así como la de hemorragia intraplaca (70.5% vs. 0%; p < 0.0001 y de infiltrado inflamatorio en las placas ateroescleroticas (76.5% vs. 46.6%; p = 0.021. En los pacientes fallecidos por infarto agudo de miocardio se observa inestabilidad de placa y actividad inflamatoria, no sólo en la arteria responsable del infarto sino también en las arterias no responsables del infarto.

  14. Actividad inflamatoria en múltiples placas ateroscleróticas en pacientes fallecidos por infarto agudo de miocardio

    Directory of Open Access Journals (Sweden)

    Alejandro García Escudero

    2009-01-01

    Full Text Available IntroducciónEstudios clínicos y anatomopatológicos sugieren que los procesos inflamatorios tienen un papel importante en la inestabilidad de la placa aterosclerótica, dado que en pacientes con síndromes coronarios agudos se observan infiltrados inflamatorios difusos en las arterias coronarias.ObjetivosEvaluar y localizar la distribución de placas vulnerables e infiltrados inflamatorios en pacientes fallecidos por infarto agudo de miocardio.Material y métodosMediante microscopia óptica se estudiaron las arterias coronarias de 58 pacientes fallecidos por infarto de miocardio. En las arterias coronarias relacionadas con el infarto y en las no relacionadas se registraron las siguientes variables: presencia de trombo, rotura de placa, hemorragia intraplaca y presencia de infiltrado inflamatorio.ResultadosAl analizar las diferencias existentes entre las arterias responsables del infarto y en las no responsables se encontraron diferencias significativas con respecto a la presencia de trombo (69% versus 38%; p < 0,008 y de hemorragia intraplaca (69% versus 50%; p < 0,03. No se encontró una diferencia significativa entre la arteria responsable y la no responsable al evaluar la presencia de infiltrado inflamatorio en las placas ateroscleróticas (77% versus 71%; p = ns.ConclusiónEn el infarto agudo de miocardio se comprobó la presencia de actividad inflamatoria que afectaba a más de un vaso, con compromiso de otras arterias además de la responsable del infarto. Se detectó también accidente agudo de placa en más de una arteria coronaria.REV ARGENT CARDIOL 2009;77:81-87.

  15. Hematoma subdural agudo espontâneo e hemorragia intracerebral em paciente com microangiopatia trombótica gestacional

    Directory of Open Access Journals (Sweden)

    Sâmia Yasin Wayhs

    2013-06-01

    Full Text Available Pré-eclâmpsia, síndrome HELLP (hemólise, elevação de enzimas hepáticas e plaquetopenia e fígado gorduroso agudo da gestação são as principais causas de microangiopatia trombótica e disfunção hepática grave durante a gestação, representando um spectrum do mesmo processo patológico. Relatou-se aqui o caso de uma gestante com 35 semanas internada em unidade de terapia intensiva no pós-operatório imediato de cesariana por morte fetal, com náuseas, vômitos e icterícia. Diagnosticaram-se pré-eclâmpsia pós-parto e fígado gorduroso agudo da gestação. Houve evolução tardia com hematoma subdural agudo e hemorragia intracerebral, sendo realizado tratamento neurocirúrgico. A paciente foi a óbito por anemia hemolítica refratária, com sangramento espontâneo em múltiplos órgãos. Pré-eclâmpsia, síndrome HELLP e fígado gorduroso agudo da gestação são processos patológicos que podem se sobrepor e se associar a complicações potencialmente fatais, como a hemorragia intracraniana aqui descrita. Sua detecção e diagnóstico precoces são fundamentais para a instituição de manejo adequado e sucesso do tratamento.

  16. Automated Angular Momentum Recoupling Algebra

    Science.gov (United States)

    Williams, H. T.; Silbar, Richard R.

    1992-04-01

    We present a set of heuristic rules for algebraic solution of angular momentum recoupling problems. The general problem reduces to that of finding an optimal path from one binary tree (representing the angular momentum coupling scheme for the reduced matrix element) to another (representing the sub-integrals and spin sums to be done). The method lends itself to implementation on a microcomputer, and we have developed such an implementation using a dialect of LISP. We describe both how our code, called RACAH, works and how it appears to the user. We illustrate the use of RACAH for several transition and scattering amplitude matrix elements occurring in atomic, nuclear, and particle physics.

  17. Rotura de la pared libre del ventrículo izquierdo secundaria a infarto agudo de miocardio

    Directory of Open Access Journals (Sweden)

    Claudio Solís

    2009-01-01

    Full Text Available RESUMENAunque la terapia trombolítica y la angioplastia primaria han cambiado radicalmente elmanejo, la evolución y el pronóstico del infarto agudo de miocardio, la rotura de la paredlibre del ventrículo izquierdo todavía implica una tasa elevada de mortalidad.Si bien la mayoría de los pacientes con esta complicación presentan un cuadro agudo ycatastrófico, que se caracteriza por taponamiento cardíaco, disociación electromecánica ymuerte en pocos minutos, aproximadamente un tercio de ellos tienen una evolución subagudacon hipotensión sostenida y diversos grados de derrame pericárdico, lo que posibilita laimplementación de medidas terapéuticas necesarias como puente al tratamiento quirúrgicoresolutivo.En este trabajo se presenta una revisión actualizada de las características clínicas yecocardiográficas de los pacientes con rotura de la pared libre del ventrículo izquierdo asociadacon infarto agudo de miocardio, con el objetivo de destacar los puntos clave del diagnóstico e incrementar la sospecha clínica de una entidad grave, no siempre fatal.REV ARGENT CARDIOL 2009;77:395-404.

  18. High angular resolution at LBT

    Science.gov (United States)

    Conrad, A.; Arcidiacono, C.; Bertero, M.; Boccacci, P.; Davies, A. G.; Defrere, D.; de Kleer, K.; De Pater, I.; Hinz, P.; Hofmann, K. H.; La Camera, A.; Leisenring, J.; Kürster, M.; Rathbun, J. A.; Schertl, D.; Skemer, A.; Skrutskie, M.; Spencer, J. R.; Veillet, C.; Weigelt, G.; Woodward, C. E.

    2015-12-01

    High angular resolution from ground-based observatories stands as a key technology for advancing planetary science. In the window between the angular resolution achievable with 8-10 meter class telescopes, and the 23-to-40 meter giants of the future, LBT provides a glimpse of what the next generation of instruments providing higher angular resolution will provide. We present first ever resolved images of an Io eruption site taken from the ground, images of Io's Loki Patera taken with Fizeau imaging at the 22.8 meter LBT [Conrad, et al., AJ, 2015]. We will also present preliminary analysis of two data sets acquired during the 2015 opposition: L-band fringes at Kurdalagon and an occultation of Loki and Pele by Europa (see figure). The light curves from this occultation will yield an order of magnitude improvement in spatial resolution along the path of ingress and egress. We will conclude by providing an overview of the overall benefit of recent and future advances in angular resolution for planetary science.

  19. Angular momentum projection with Pfaffian

    International Nuclear Information System (INIS)

    Oi, M.

    2011-01-01

    Recent developments to rewrite the Onishi formula for an evaluation of the so-called norm overlap kernel necessary in angular momentum projection are to be discussed. The essential ingredients in the development, that is, the Fermion coherent states, the Grassmann numbers, and the Pfaffian, are explained. (author)

  20. Angular overlap model in actinides

    International Nuclear Information System (INIS)

    Gajek, Z.; Mulak, J.

    1991-01-01

    Quantitative foundations of the Angular Overlap Model in actinides based on ab initio calculations of the crystal field effect in the uranium (III) (IV) and (V) ions in various crystals are presented. The calculations justify some common simplifications of the model and fix up the relations between the AOM parameters. Traps and limitations of the AOM phenomenology are discussed

  1. Angular overlap model in actinides

    Energy Technology Data Exchange (ETDEWEB)

    Gajek, Z.; Mulak, J. (Polska Akademia Nauk, Wroclaw (PL). Inst. Niskich Temperatur i Badan Strukturalnych)

    1991-01-01

    Quantitative foundations of the Angular Overlap Model in actinides based on ab initio calculations of the crystal field effect in the uranium (III) (IV) and (V) ions in various crystals are presented. The calculations justify some common simplifications of the model and fix up the relations between the AOM parameters. Traps and limitations of the AOM phenomenology are discussed.

  2. Infarto agudo do miocárdio na 31ª semana de gravidez: relato de caso

    Directory of Open Access Journals (Sweden)

    Filipa Pires Duarte

    2011-04-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A ocorrência de infarto agudo do miocárdio (IAM durante a gravidez é rara. Os autores descrevem o caso de IAM numa grávida de 31 semanas e a importância da existência de uma equipe multidisciplinar para sua abordagem. RELATO DO CASO: Grávida de 31 semanas, com antecedentes de tabagismo, alcoolismo e hipertensão, internada após um episódio de síncope. Na admissão, encontrava-se consciente e assintomática, embora hipotensa. O eletrocardiograma evidenciou marcada elevação do segmento ST em DI, AVL, V1-V6. Pesquisa de enzimas cardíacas foi positiva. O ecocardiograma transtorácico demonstrou redução da contratilidade ventricular esquerda e septal e uma fração de ejeção de 30%. A angiografia revelou oclusão proximal da artéria descendente anterior. Por insucesso da angioplastia por balão, foi colocado um stent metálico. A paciente iniciou terapêutica com b-bloqueadores, aspirina e clopidogrel. Em relação ao parto, optou-se por realizar cesariana eletiva, quatro semanas após o IAM. Suspendeu-se o clopidogrel sete dias antes do parto. A função cardíaca pré-operatória foi otimizada com infusão de levosimendana iniciada no dia anterior. A cesariana decorreu sob bloqueio peridural. O período intraoperatório decorreu sem complicações, à exceção de moderada hipotensão facilmente corrigida com fenilefrina. O índice de Apgar do recém-nascido foi de 9/10. CONCLUSÕES: Este é um dos poucos casos de infarto agudo do miocárdio e angioplastia descritos durante a gravidez. Os autores discutem as decisões tomadas pela equipe multidisciplinar, constituída por anestesiologistas, obstetras, cardiologistas e neonatologistas, notadamente no que se refere à dupla antiagregação plaquetária, ao tipo de parto e à anestesia.

  3. Manejo do paciente com infarto agudo do miocárdio atendido no SUS

    Directory of Open Access Journals (Sweden)

    Emerson de Albuquerque Seixas

    2016-10-01

    Full Text Available Introdução: O Infarto Agudo do Miocárdio (IAM é causado pela interrupção do fluxo sanguíneo nas artérias coronárias que irrigam o miocárdio. Trata-se de um evento com alta prevalência, que necessita de internação hospitalar e rápido tratamento. Objetivos: Descrever um caso de IAM que recebeu terapia trombolítica incompleta e realizou angioplastia parcial; Metodologia: Relato de caso de paciente internado no Conjunto Hospitalar de Sorocaba; Relato de Caso: SSA, 74anos, masculino, hipertenso e diabético há 20 anos, procurou o Pronto-Socorro na origem no dia 01/09/2015 com quadro de dor precordial intensa, após realização de esforço físico. Ao exame físico, apresentava-se taquicárdico (FC:150bpm e hipertenso (PA:230X120mmHg.Foi realizado ECG, que evidenciou supradesnivelamento do segmento ST em parede anterior extensa (de V1 a V5,DI e aVL. Foi optado pelo tratamento com agente trombolítico, porém o local só dispunha de metade da dose recomendada. Então foi transferido para o Conjunto Hospitalar de Sorocaba, onde foi optado por não realizar o restante da medicação. Cateterismo cardíaco realizado somente 14 dias depois, evidenciando 4 lesões. Realizada uma angioplastia com implante de apenas 2 stents. Foi solicitado nova angioplastia, que foi negada. Recebeu alta e atualmente aguarda a liberação do procedimento via ambulatorial, com quadro de angina estável. Conclusões: O relato reforça a necessidade da melhoria das condições de atendimento e tratamento de pacientes vítimas de infarto agudo do miocárdio no SUS.

  4. Sindrome confusional agudo por abstinencia aguda de nicotina Delirium due to acute nicotine withdrawal

    Directory of Open Access Journals (Sweden)

    Manuel Klein

    2002-08-01

    Full Text Available El síndrome confusional agudo (SCA o delirium en pacientes hospitalizados es un problema frecuente y grave. Se caracteriza por síntomas de comienzo agudo y curso fluctuante con inatención, pensamiento desorganizado, y con distintos niveles de alteración de la conciencia.En la bibliografía consultada, el SCA como manifestación de un síndrome de abstinencia aguda nicotínica fue descripto en solo ocho casos. Presentamos el caso de un tabaquista grave que, internado por una reagudización de su enfermedad pulmonar obstructiva crónica (EPOC, presentó un cuadro de SCA al tercer día de abstinencia tabacal, cediendo los síntomas tras la administración de un parche de nicotina. Lo descripto sugiere que en pacientes internados que presentan SCA y agitación, con fuertes antecedentes de tabaquismo, un simple ensayo con un parche de nicotina puede ofrecer en pocas horas una notable respuesta terapéutica y a su vez un test confirmatorio. El reconocimiento del SCA como forma de presentación de la abstinencia nicotínica permitirá identificar casos habitualmente complejos en los que se podrá implementar una sencilla y eficaz alternativa terapéutica.Delirium or acute confusional state among hospitalized patients is a frequent and serious problem. It is characterized by acute onset symptoms, fluctuating course, impaired attention, unorganized thinking, and altered level of conciousness. Delirium, as a manifestation of acute nicotine withdrawal syndrome has been reported in the reviewed literature only in eight cases. We report the case of a heavy smoker admitted because of a reagudization of his chronic obstructive pulmonary disease. At the third day of nicotine abstinence, he developed delirium with a rapid improvement of his symptoms after treatment with a transdermal nicotine patch. This description suggests that in hospitalized heavy smokers who develop delirium with agitation, a simple trial with a nicotine patch can offer a dramatic

  5. Angular momentum in general relativity

    International Nuclear Information System (INIS)

    Prior, C.R.

    1977-01-01

    The definition of angular momentum proposed in part I of this series (Prior. Proc. R. Soc. Lond.; A354:379 (1977)) is investigated when applied to rotating black holes. It is shown how to use the formula to evaluate the angular momentum of a stationary black hole. This acts as a description of a background space on which the effect of first matter and then gravitational perturbations is considered. The latter are of most interest and the rate of change of angular momentum, dJ/dt, is found as an expression in the shear induced in the event horizon by the perturbation and in its time integral. Teukolsky's solutions (Astrophys. J.; 185:635 (1973)) for the perturbed component of the Weyl tensor are then used to find this shear and hence to give an exact answer for dJ/dt. One of the implications of the result is a direct verification of Bekenstein's formula (Phys. Rev.; 7D:949 (1973)) relating in a simple way the rate of change of angular momentum to the rate of change of mass caused by a plane wave. A more general expression is also given for dM/dt. Considering only stationary perturbations, it is shown how to generalize the definition of angular momentum so as to include information about its direction as well. Three problems are particularly discussed - a single moon, two or more moons and a ring of matter causing the perturbation - since they provide illustrations of all the main features of the black hole's behaviour. In every case it is found that the black hole realigns its axis of rotation so that the final configuration is axisymmetric if possible; otherwise is slows down completely to reach a static state. (author)

  6. Síndrome de Horner y bloqueo del plexo braquial ipsilateral en un caso de analgesia epidural para el trabajo del parto Horner´s sydrome and ipsilateral brachial plexus block during an epidural analgesia labour procedure

    OpenAIRE

    J. Avellanosa; J. Vera; P. Morillas; E. Gredilla; F. Gilsanz

    2006-01-01

    El Síndrome de Horner es una complicación de la anestesia epidural que aparece más frecuentemente en pacientes obstétricas debido a los cambios fisiológicos y anatómicos propios del embarazo; sin embargo, su incidencia es baja, y sólo se han descrito dos casos previos asociando un bloqueo del plexo braquial. Presentamos el caso de una gestante de 23 años que precisó analgesia epidural para el trabajo de parto. Tras comprobar la correcta colocación del catéter se administró una dosis inicial e...

  7. Current perspectives of acute pain treatment Perspectivas actuales de tratamiento del paciente con dolor agudo

    Directory of Open Access Journals (Sweden)

    Tiberio Alvarez Echeverri

    1993-03-01

    Full Text Available

    In the last years opioids have become of great importance in the relief of postoperative and other forms of acute pain. Reasons for this trend have been the availability of agonist opioids like phentanyl. sulphentanyl and alphentanyl and the results of research on the physlology. The pharmacology and the chemistry of drug receptors and neurotransmitters. The studies on chemicals other than opioids that contribute to pain relief when administered through different ways. specially the spinal. Have also influenced such a trend.

    En los últimos años los opiáceos han adquirido gran importancia en el alivio del dolor agudo especialmente del tipo postoperatorio. Una de las razones ha sido la disponibilidad de morfínicos agonistas como el fentanil, el sufentanil y el alfentanil; otra es la investigación de la fisiología, la farmacología y la química de los receptores y los neurotransmisores como de sustancias diferentes a los opláceos, aplicadas por diferentes vías en especial la espinal, que coadyuvan al alivio del dolor.

  8. Riscos cardiovasculares do bloqueio androgênico Riesgos cardiovasculares del bloqueo androgénico Cardiovascular risks of androgen deprivation therapy

    Directory of Open Access Journals (Sweden)

    Adriano Freitas Ribeiro

    2010-09-01

    Full Text Available O adenocarcinoma de próstata é o câncer mais comum no sexo masculino após o câncer de pele. Entre as várias formas de tratamento do câncer de próstata, a terapia de bloqueio androgênico é uma modalidade consagrada nos pacientes com doença metastática ou localmente avançada, que provavelmente resulta em aumento de sobrevida. No entanto, o bloqueio androgênico é causador de uma série de consequências adversas. Complicações como osteoporose, disfunção sexual, ginecomastia, anemia e alterações na composição corporal são bem conhecidas. Recentemente, uma série de complicações metabólicas foi descrita como aumento da circunferência abdominal, resistência à insulina, hiperglicemia, diabete, dislipidemia e síndrome metabólica com consequente aumento do risco de eventos coronarianos e mortalidade cardiovascular nessa população específica. Este artigo de atualização apresenta uma revisão bibliográfica realizada no MEDLINE de toda literatura publicada em inglês no período de 1966 até junho de 2009, com as seguintes palavras-chave: androgen deprivation therapy, androgen supression therapy, hormone treatment, prostate cancer, metabolic syndrome e cardiovascular disease, no intuito de analisar quais seriam os reais riscos cardiovasculares da terapia de deprivação androgênica, também chamada bloqueio androgênico, nos pacientes com câncer de próstata.El adenocarcinoma de próstata es el cáncer más común en el sexo masculino después del cáncer de piel. Entre las varias formas de tratamiento del cáncer de próstata, la terapia de bloqueo androgénico es una modalidad consagrada en los pacientes con enfermedad metastásica o localmente avanzada, que probablemente resulta en aumento de sobrevida. Mientras tanto, el bloqueo androgénico es causante de una serie de consecuencias adversas. Complicaciones como osteoporosis, disfunción sexual, ginecomastia, anemia y alteraciones en la composición corporal son

  9. On Dunkl angular momenta algebra

    Energy Technology Data Exchange (ETDEWEB)

    Feigin, Misha [School of Mathematics and Statistics, University of Glasgow,15 University Gardens, Glasgow G12 8QW (United Kingdom); Hakobyan, Tigran [Yerevan State University,1 Alex Manoogian, 0025 Yerevan (Armenia); Tomsk Polytechnic University,Lenin Ave. 30, 634050 Tomsk (Russian Federation)

    2015-11-17

    We consider the quantum angular momentum generators, deformed by means of the Dunkl operators. Together with the reflection operators they generate a subalgebra in the rational Cherednik algebra associated with a finite real reflection group. We find all the defining relations of the algebra, which appear to be quadratic, and we show that the algebra is of Poincaré-Birkhoff-Witt (PBW) type. We show that this algebra contains the angular part of the Calogero-Moser Hamiltonian and that together with constants it generates the centre of the algebra. We also consider the gl(N) version of the subalgebra of the rational Cherednik algebra and show that it is a non-homogeneous quadratic algebra of PBW type as well. In this case the central generator can be identified with the usual Calogero-Moser Hamiltonian associated with the Coxeter group in the harmonic confinement.

  10. Angular momentum in QGP holography

    Directory of Open Access Journals (Sweden)

    Brett McInnes

    2014-10-01

    Full Text Available The quark chemical potential is one of the fundamental parameters describing the quark–gluon plasma produced by sufficiently energetic heavy-ion collisions. It is not large at the extremely high temperatures probed by the LHC, but it plays a key role in discussions of the beam energy scan programmes at the RHIC and other facilities. On the other hand, collisions at such energies typically (that is, in peripheral collisions give rise to very high values of the angular momentum density. Here we explain that holographic estimates of the quark chemical potential of a rotating sample of plasma can be very considerably improved by taking the angular momentum into account.

  11. Angular momentum content of galaxies

    International Nuclear Information System (INIS)

    Shaya, E.J.; Tully, R.B.

    1984-01-01

    A schema of galaxy formation is developed in which the environmental influence of large-scale structure plays a dominant role. This schema was motivated by the observation that the fraction of E and S0 galaxies is much higher in clusters than in low-density regions and by an inference that those spirals that are found in clusters probably have fallen in relatively recently from the low-density regions. It is proposed that the tidal field of the Local Supercluster acts to determine the morphology of galaxies through two complementary mechanisms. In the first place, the supercluster can apply torques to protogalaxies. Galaxies which collapsed while expanding away from the central cluster decoupled from the external tidal field and conserved the angular momentum that they acquired before collapse. Galaxies which formed in the cluster while the cluster collapsed continued to feel the tidal field. In the latter case, the spin of outer collapsing layers can be halted and reversed, and tends to cancel the spin of inner layers. The result is a reduction of the total angular momentum content of the galaxy. In addition, the supercluster tidal field can regulate accretion of fresh material onto the galaxies since the field creates a Roche limit about galaxies and material beyond this limit is lost. Any material that has not collapsed onto a galaxy by the time the galaxy falls into a cluster will be tidally stripped. The angular momentum content of that part of the protogalactic cloud which has not yet collapsed . continues to grow linearly with time due to the continued torquing by the supercluster and neighbors. Galaxies at large distances from the cluster core can continue to accrete this high angular momentum material until the present, but galaxies that enter the cluster are cut off from replenishing material

  12. Angular dependence of shallow dose

    International Nuclear Information System (INIS)

    Alvarez, J.L.

    1986-01-01

    The theoretical response of a detector is discussed and compared to measurements of shallow dose with tissue and phantom response detectors. A definite energy dependent angular response of dose and measurement was observed which could not be explained by simple trigonometric arguments. The response is back scatter dependent and must be considered in detector design and dose measurements. It is not possible for standard detectors to follow this response

  13. AngularJS test-driven development

    CERN Document Server

    Chaplin, Tim

    2015-01-01

    This book is for developers who want to learn about AngularJS development by applying testing techniques. You are assumed to have a basic knowledge and understanding of HTML, JavaScript, and AngularJS.

  14. Angular-momentum transport in nuclear collisions

    International Nuclear Information System (INIS)

    Wolschin, G.; Ayik, S.; Noerenberg, W.

    1978-01-01

    Among the various relaxation processes that can be observed in heavy-ion collisions, the dissipation of relative angular momentum into intrinsic angular momentum of the fragments attracts increasing attention. Here we present a transport theoretical description of angular-momentum and mass transport that allows for a transparent interpretation of the data. (orig.) [de

  15. AngularJS web application development

    CERN Document Server

    Darwin, Peter Bacon

    2013-01-01

    The book will be a step-by-step guide showing the readers how to build a complete web app with AngularJSJavaScript developers who want to learn AngularJS for developing web apps. Knowledge of JavaScript and HTML is expected. No knowledge of AngularJS is required.

  16. Frecuencia de secuela renal pos evento agudo en síndrome urémico hemolítico

    Directory of Open Access Journals (Sweden)

    Jose Antonio Lulli-Cantoni

    2015-04-01

    Full Text Available Objetivos: Determinar la frecuencia de secuela renal después del evento agudo de Síndrome Urémico Hemolítico (SUH en niños y los factores asociados a la presencia de secuelas. Material y métodos: Estudio descriptivo y retrospectivo. Se revisaron las historias clínicas de los pacientes con SUH en el HNCH de 1997 al 2012, y se registraron datos de características clínicas, hallazgos de laboratorio y parámetros de función renal al ingreso, al alta y a los seis meses después del alta. En los casos que no contaban con control a los 6 meses, se intentó contactar a los pacientes para tomar nuevos controles. Resultados: Siete de 12 pacientes presentaron disminución en la tasa de filtración glomerular (TFG o proteinuria o hipertensión a los 6 meses o más después del episodio agudo, con un promedio de 30,75 meses de seguimiento. Tanto en los pacientes con secuelas como con recuperación renal se encontró una distribución similar de los factores asociados a secuelas como hipertensión al alta, proteinuria al alta, necesidad de diálisis, oligoanuria, leucocitosis > 20 000 cel/mm3 y síntomas neurológicos. Sin embargo algunas variables como oligoanuria y necesidad de diálisis se encontraron a niveles por debajo de los descritos en la literatura. Conclusiones: Es claro que existen pacientes con secuelas renales luego del episodio agudo de SUH que además presentan varios factores predictores de secuelas descritos en la literatura.

  17. Grupos de utilizacion de recursos en unidades de agudos y media estancia de servicios de geriatria

    Directory of Open Access Journals (Sweden)

    Solano Jaurrieta Juan José

    2001-01-01

    Full Text Available Fundamentos: En los últimos años se han implantado en nuestro país Sistemas de Clasificación de Pacientes (SCP con objeto de medir el «producto hospitalario». Sin embargo los sistemas más tradicionales resultan poco adecuados para la población anciana, en los que la incapacidad asociada a la enfermedad resulta determinante para explicar el consumo de recursos y los resultados asistenciales. Por ello, nos planteamos aplicar en servicios especializados de atención al anciano un sistema que contempla este parámetro, los Grupos de Utilización de Recursos (RUG, analizando las características y diferencias en la distribución en función de RUG en cuatro Servicios de Geriatría. Métodos: Se estudian transversalmente, mediante cortes sucesivos en períodos superiores a la estancia media en cada unidad, los pacientes ingresados en las unidades de agudos y media estancia de los Servicios de Geriatría del Hospital Monte Naranco (HMN (n=318, Hospital Central de la Cruz Roja (HCCR (n=384, Hospital General de Guadalajara (HG (n=272 y Hospital Virgen del Valle (HVV (n=390, en lo relativo a su distribución según la clasificación RUG-T18. Las posibles diferencias entre los centros se analizaron mediante el test estadístico chi-cuadrado (SPSS para windows Resultados: Para el conjunto de la muestra los pacientes se concentran en los grupos R, S y C de la clasificación, con muy escasa representación de los grupos P y B, detectándose diferencias entre los centros. Así, el HCCR es el que maneja una mayor proporción de pacientes del grupo R (47,64% vs. 23,66% en el HMN, 20,57% en el HG y 20,53% en el HVV y una menor proporción de pacientes del grupo S (3,12% vs 6,40% en el HMN, 9,92% en el HG y 9,76% en el HVV y C (48,94% vs 76,29% en el HMN, 66,89% en el HG y 68,36% en el HVV. Igualmente es posible detectar diferencias en el análisis individual para las unidades de agudos y media estancia. Conclusiones: Los grupos de utilización de recursos

  18. GRUPOS DE UTILIZACION DE RECURSOS EN UNIDADES DE AGUDOS Y MEDIA ESTANCIA DE SERVICIOS DE GERIATRIA

    Directory of Open Access Journals (Sweden)

    Juan José Solano Jaurrieta

    2001-01-01

    Full Text Available Fundamentos: En los últimos años se han implantado en nuestro país Sistemas de Clasificación de Pacientes (SCP con objeto de medir el «producto hospitalario». Sin embargo los sistemas más tradicionales resultan poco adecuados para la población anciana, en los que la incapacidad asociada a la enfermedad resulta determinante para explicar el consumo de recursos y los resultados asistenciales. Por ello, nos planteamos aplicar en servicios especializados de atención al anciano un sistema que contempla este parámetro, los Grupos de Utilización de Recursos (RUG, analizando las características y diferencias en la distribución en función de RUG en cuatro Servicios de Geriatría. Métodos: Se estudian transversalmente, mediante cortes sucesivos en períodos superiores a la estancia media en cada unidad, los pacientes ingresados en las unidades de agudos y media estancia de los Servicios de Geriatría del Hospital Monte Naranco (HMN (n=318, Hospital Central de la Cruz Roja (HCCR (n=384, Hospital General de Guadalajara (HG (n=272 y Hospital Virgen del Valle (HVV (n=390, en lo relativo a su distribución según la clasificación RUG-T18. Las posibles diferencias entre los centros se analizaron mediante el test estadístico chi-cuadrado (SPSS para windows Resultados: Para el conjunto de la muestra los pacientes se concentran en los grupos R, S y C de la clasificación, con muy escasa representación de los grupos P y B, detectándose diferencias entre los centros. Así, el HCCR es el que maneja una mayor proporción de pacientes del grupo R (47,64% vs. 23,66% en el HMN, 20,57% en el HG y 20,53% en el HVV y una menor proporción de pacientes del grupo S (3,12% vs 6,40% en el HMN, 9,92% en el HG y 9,76% en el HVV y C (48,94% vs 76,29% en el HMN, 66,89% en el HG y 68,36% en el HVV. Igualmente es posible detectar diferencias en el análisis individual para las unidades de agudos y media estancia. Conclusiones: Los grupos de utilización de recursos

  19. Morbilidad y mortalidad en pacientes con infarto agudo de miocardio ST elevado en un hospital general

    Directory of Open Access Journals (Sweden)

    Eduardo Carcausto

    2010-10-01

    Full Text Available Objetivo: Determinar la morbilidad y mortalidad de los pacientes con infarto agudo de miocardio ST elevado (IMA STE atendidos en un hospital general y describir sus características demográficas, clínicas y epidemiológicas. Material y métodos: Estudio descriptivo, serie de casos, retrospectivo, en pacientes con IMA STE en el Hospital Nacional Cayetano Heredia, del 1 de enero a 31 de diciembre del 2007. Se registraron variables clínicas y de laboratorio. Resultados: Se incluyeron 30 casos. El 86,7% fueron varones. La edad media fue de 62,8±12,6 años. El antecedente de hipertensión arterial se encontró en 57%, obesidad en 40%, tabaquismo en 40%, y de diabetes mellitus en 30%. El dolor torácico típico ocurrió en 75% de pacientes. El 50% de pacientes tuvieron hipertensión no controlada a la admisión, 33% leucocitosis, y 46% glicemia >110 mg/dl. Sólo 25% recibió terapia de reperfusión, 33,3% de casos de forma exitosa, siendo el tiempo puerta-aguja de 250 ± 114 minutos. Las complicaciones ocurrieron en 26,6% de pacientes, siendo la mortalidad de 13,3%. El 76% ingresó al hospital con un tiempo de dolor menor de 3 horas, Conclusiones: Los pacientes con IMA ST elevado fueron predominantemente varones, mayores de 60 años, ingresaron al hospital con un tiempo de dolor torácico menor de tres horas y un mínimo porcentaje recibió terapia de repercusión. Las arritmias fueron las complicaciones más frecuentes y la mortalidad post IMA alcanzó 13,3 % de los casos.(Rev Med Hered 2010;21:202-207.

  20. Adherencia al tratamiento y calidad de vida en personas con infarto agudo de miocardio

    Directory of Open Access Journals (Sweden)

    Jennifer Rojas-Reyes

    2016-01-01

    Full Text Available Objetivo: identificar la asociación entre adherencia al tratamiento y calidad de vida relacionada con la salud (CVRS en población con infarto agudo de miocardio (IAM. Materiales y método: estudio cuantitativo de diseño descriptivo correlacional de corte transversal. Se eligieron 180 participantes por muestreo de tipo probabilístico con selección aleatoria simple. Para el análisis estadístico, se utilizó estadística no paramétrica con correlación de Spearman. Resultados: la edad media fue de 63 años, el promedio de tiempo transcurrido después del infarto fue de 35 meses. Frente al nivel de adherencia al tratamiento, predominó la adherencia total (54 %, adherencia parcial (45%; en cuanto a la calidad de vida relacionada con la salud, el 27 % tuvo un bajo nivel; respecto a la correlación de Spearman, se estableció un coeficiente de -0,315 con una significancia de p=0,00, donde el número negativo es reflejo de la naturaleza de las escalas con las que fueron medidas las variables, por lo que la correlación es positiva, significativa, pero numéricamente modesta. Conclusión: la asociación entre adherencia al tratamiento y calidad de vida relacionada con la salud evidencia en una correlación estadísticamente significativa, pero catalogada como modesta, siendo estos resultados coherentes con la multidimensionalidad de los fenómenos.

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

    Directory of Open Access Journals (Sweden)

    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.

  2. Radicales libres de oxígeno y distress respiratorio agudo

    Directory of Open Access Journals (Sweden)

    Aracelis E. Dorado Lambert

    2000-09-01

    Full Text Available Se realizó una revisión acerca de la formación de radicales libres de oxígeno en el organismo, así como el aumento exagerado de su génesis durante la exposición a altas concentraciones de oxígeno y en el desarrollo de la explosión respiratoria que acompaña la fagocitosis. Se analiza además la formación de estos radicales en el pulmón durante la evolución del distress respiratorio agudo. Se abordó, posteriormente, el uso actual, sobre todo en el ámbito internacional, de los antioxidantes y bloqueadores de la lipoperoxidación para disminuir los efectos adversos de los radicales libres. A pesar de estas nuevas medidas, se corrobora que la disminución experimentada en la mortalidad por esta entidad, obedece a la optimización de los cuidados respiratorios, en especial la ventilación mecánica.The formation of free oxygen radicals in the body and the excessive increase of its genesis during exposure to high concentrations of oxygen and in the development of respiratory burst accompanying phagocytosis were reviewed. Also the formation of these radicals in lung during acute respiratory distress was analyzed. Similarly, the present use at the international level of antioxidants and lipoperoxidation blockers to diminish adverse effects of free radicals are addressed in this paper. In spite of these new measures, it was confirmed that the reduction of mortality rate from this disease was due to the improvement of respiratory care particularly the mechanical ventilation.

  3. Daño pulmonar agudo asociada a transfusión en el embarazo

    Directory of Open Access Journals (Sweden)

    Silvia María Melians Abreu

    2014-06-01

    Full Text Available Introducción: el daño pulmonar agudo asociado a la transfusión es una reacción adversa a la transfusión poco frecuente, la mortalidad se ha estimado entre 1-10 %. Su diagnóstico es clínico e infrecuentemente sospechado, su incidencia es baja. Presentación del caso: se presentaron dos transfusión-related-acute-lunginjury en dos gestantes con 28,5 y 32 semanas de embarazo respectivamente, hospitalizadas en la salas de cuidados materno perinatales con enfermedades asociadas al embarazo, a quienes se le administraron componentes sanguíneos, ambas a las 5 horas de transfundidas; presentaron el síndrome clínico con hipoxemia moderada y necesitaron ventilación; con estos hallazgos y la relación temporal con la transfusión. Se realizó el diagnóstico de síndrome de dificultad respiratoria aguda moderada asociada a transfusión. Conclusiones: el resultado fue óptimo con resolución completa del evento respiratorio. Se considera importante reportar ambos casos dado su aparición en embarazadas, causa poco frecuente informada en la literatura y la importancia de conservar la salud de la madre del niño y la niña e incentivar la notificación de esta reacción adversa a la transfusión al banco de sangre para fortalecer el sistema de hemovigilancia.

  4. Nefropatía por contraste en el síndrome coronario agudo

    Directory of Open Access Journals (Sweden)

    Mariana Carnevalini

    2011-10-01

    Full Text Available La nefropatía inducida por contraste (NIC es una de las causas más frecuentes de insuficiencia renal en pacientes internados. En el síndrome coronario agudo (SCA, la presencia de NIC aumenta la morbimortalidad. Las medidas de profilaxis y los factores de riesgo intervinientes de NIC en SCA no han sido determinados con exactitud. El objetivo de este estudio fue evaluar la incidencia de NIC y los factores asociados a su desarrollo en pacientes ingresados en unidad coronaria con requerimiento de cinecoronariografía (CCG. Se realizó un estudio de cohorte retrospectivo. Se incluyeron pacientes consecutivos cursando SCA estudiados con CCG dentro de las 72 horas de su admisión. Se definió NIC al aumento del 25% del valor de creatinina a las 48 h sobre el nivel basal de ingreso. El período de inclusión fue entre el 1° de enero de 2004 hasta el 30 de junio de 2010. Se analizaron 125 casos. La incidencia de NIC fue del 10.4% (n = 13. En el análisis multivariado, los factores asociados independientemente a su desarrollo fueron la edad [OR 1.05 (IC 95% 1.004 - 1.11 p = 0.034], la angioplastia a múltiple vaso [OR 2.2 (IC 95% 1.07 - 4.8, p = 0.03] y el volumen de contraste utilizado [OR 1.007 (IC 95% 1.001 - 1.01, p = 0.014].

  5. Descripción de un brote de enfisema y edema pulmonar agudo del bovino (EPAB) en Parral (Chile)

    OpenAIRE

    URRUTIA, H.; BREVIS, C.; QUEZADA, M.; DONOSO, S.

    1997-01-01

    Se describe un brote de enfisema y edema alveolar agudo del bovino (EPAB) ocurrido en la zona centro-sur a fines del verano de 1995. Los animales Frisón negro, de aproximadamente 2 años de edad, fueron afectados después de cambiarse de una pradera fibrosa a una suculenta de alfalfa. La mortalidad por esta causa fue de un 23%. Las principales lesiones encontradas en la necropsia fueron enfisema y edema intersticial intenso del pulmón, lo cual fue corroborado histopatológicamente, encontrándos...

  6. Fisiopatología del dolor agudo: alteraciones cardiovasculares, respiratorias y de otros sistemas y órganos

    OpenAIRE

    Pérez-Castañeda Jorge, Tania

    2012-01-01

    Introducción: El dolor agudo constituye una compleja constelación de experiencias sensoriales y emocionales, relacionadas con respuestas autónomas producidas por daño a estructuras somáticas o viscerales. Las vías del dolor transmiten la información nociceptiva a través del sistema nervioso periférico y central y están plenamente integradas con el sistema motor y simpático a nivel medular y de los centros nerviosos superiores y dan lugar a actividad motora refleja, hiperactividad simpática y ...

  7. Descripción de un brote de enfisema y edema pulmonar agudo del bovino (EPAB) en Parral (Chile)

    OpenAIRE

    H. URRUTIA; C. BREVIS; M. QUEZADA; S. DONOSO

    1997-01-01

    Se describe un brote de enfisema y edema alveolar agudo del bovino (EPAB) ocurrido en la zona centro-sur a fines del verano de 1995. Los animales Frisón negro, de aproximadamente 2 años de edad, fueron afectados después de cambiarse de una pradera fibrosa a una suculenta de alfalfa. La mortalidad por esta causa fue de un 23%. Las principales lesiones encontradas en la necropsia fueron enfisema y edema intersticial intenso del pulmón, lo cual fue corroborado histopatológicamente, encontrándose...

  8. Sistema informático para la gestión de la información hospitalaria del infarto agudo de miocardio (RHIMA)

    OpenAIRE

    Yanier Coll Muñoz; Francisco Valladares Carvajal; Jorge L. Fernández Curbelo; Ing. Luis E. Fernández Curbelo

    2015-01-01

    Introducción: La difícil recopilación de información sobre la prevalencia y desarrollo del infarto agudo de miocardio imposibilita medir la calidad del tratamiento durante la evolución de la enfermedad en un determinado grupo de pacientes.Objetivo: Desarrollar un sistema informático que permita la gestión de la información hospitalaria del infarto agudo de miocardio en el Servicio de Cardiología.Método: Se identificaron las variables necesarias para la confección del registro, divididas por b...

  9. Características clínicas y diagnósticas en infarto renal agudo en una serie clínica

    Directory of Open Access Journals (Sweden)

    C. Juan Alberto Fierro, Dr.

    2010-07-01

    Full Text Available El infarto renal agudo constituye un diagnóstico infrecuente. Ello puede deberse a que sus síntomas son similares a los de los cálculos renales o la pielonefritis aguda. Por esa razón, el síntoma cardinal de dolor de flanco debe ser investigado en forma muy acabada. Esta serie clínica revisa seis casos de infarto renal agudo vistos en esta institución durante el año 2007.

  10. Occurrence of uranium in the itabiritic iron ore of Morro Agudo on the NE border of the iron Quadrangle/Minas Gerais, Brasilien

    International Nuclear Information System (INIS)

    Guba, I.

    1982-01-01

    The precambrian itabirites and hematite ores of the Morro Agudo iron ore mine on the NE border of the Quadrilatero Ferrifero in Minas Gerais/Brazil contain uranium-bearing minerals and rare-earth elements. In association with phosphates they occupy planes of joints, fractures and cleavage in the area of amphibolitic schist which is intercalated in the s 1 -planes of the itabirites and hematite ores. Preliminary analyses of the uranium-bearing minerals were made by energy dispersive X-ray spectrometry and electron microscopy. The results are presented in connection with the lithologic and tectonic features of the Morro Agudo mine. (orig.) [de

  11. Bloqueio "3 em 1" por via anterior: bloqueio parcial, completo ou superdimensionado? Correlação entre anatomia, clínica e radio imagens Bloqueo "3 en 1" por vía anterior: bloqueo parcial, completo o superdimensionado? Correlación entre anatomía, clínica y radio imágenes Anterior "3-in-1" blockade: partial, total or overdimensioned block? Correlation between anatomy, clinic and radio images

    Directory of Open Access Journals (Sweden)

    Karl Otto Geier

    2004-08-01

    em 1" ou "2,5 em 1", sem a participação do nervo obturador. Com cateter curto (G2, o bloqueio "3 em 1" foi classificado como completo em 6,6% dos casos (um paciente. Porém, com cateter longo (G3, o resultado tende a ser mais previsível em relação aos outros grupos, especialmente quando o cateter alcança o espaço paravertebral lombossacral, resultando num bloqueio "3 em 1" completo em 20% dos casos (três pacientes ou, raramente, num bloqueio "3 em 1" superdimensionado em 13,2% dos casos (dois pacientes.JUSTIFICATIVA Y OBJETIVOS: El clásico bloqueo "3 en 1" por vía anterior ha suscitado divergencias cuanto al envolvimiento anestésico de sus tres participantes, el nervio femoral, el nervio cutáneo lateral del muslo y el nervio obturador. El objetivo de este estudio es verificar el resultado del bloqueo "3 en 1" por vía anterior, a través de las técnicas: inyección única (G1, catéteres cortos (G2 y catéteres largos (G3. Los bloqueos "3 en 1", clínicamente identificados como completos o superdimensionados fueron, adicionalmente, investigados por medio de radio imagen. MÉTODO: La identificación del espacio subfascial ilíaco en los bloqueos "3 en 1" con inyección única o con catéteres fue hecha por la pérdida de resistencia al aire. En varios eventos dolorosos, el volumen anestésico administrado varió entre 30 y 40 ml y la introducción cranial de los catéteres fue hasta 18 cm en el espacio subfascial ilíaco. Cuando la pesquisa clínica apuntaba envolvimiento del nervio obturador o de otro nervio adicional al bloqueo "3 en 1", se complementava la investigación con estudio radiográfico y tomodensiométrico con el propósito de establecer correspondencia con la anatomía pélvica. RESULTADOS: El envolvimiento de los nervios femoro cutáneo lateral y obturador no fueron constantes, al contrario del nervio femoral. En el estudio, ningún bloqueo "3 en 1" completo con inyección única (G1 se manifestó, y si un bloqueo "2 en 1", con la

  12. Electron angular distribution axial channeling

    International Nuclear Information System (INIS)

    Khokonov, A.Kh.; Khokonov, M.Kh.

    1989-01-01

    Angular distributions of ultra-relativistic electrons are calculated in the assumption about presence of statistical equilibrium. Analysis is based on numerical solution of Fokker-Planck type kinetic equation. It is shown that in contrast to case of amorphous medium, the multiple scattering at axial channeling of negative particles results in self-focusing of the initial beam particles and due to it number of electrons moving at an angles to the chain, which are smaller, than critical angle of channeling, may increase by several times as compared to the initial one

  13. Caracterización del infarto agudo del miocardio en mujeres atendidas en el hospital Ernesto Guevara

    Directory of Open Access Journals (Sweden)

    Zailit González Cruz

    2014-08-01

    Full Text Available En Las Tunas han aumentado las cifras de mujeres afectadas por infarto agudo del miocardio (IMA, con una tasa de mortalidad superior a la media nacional. A pesar de ello, no existen estudios publicados que describan el comportamiento de esta entidad en las mujeres tuneras. Se realizó un estudio transversal descriptivo en el servicio de cardiología del hospital provincial de Las Tunas, “Dr. Ernesto Guevara de la Serna”, entre los años 2009 al 2011, con el objetivo de caracterizar el infarto agudo del miocardio en el sexo femenino. La muestra estuvo constituida por 181 mujeres admitidas en el servicio por esta entidad, diagnosticadas según los criterios establecidos. Para el análisis de los resultados se utilizó la estadística descriptiva, con valores absolutos y porcientos. En la muestra de estudio prevaleció el IMA CEST, de topografía anterior y no trombolizado. La disfunción ventricular izquierda constituyó la complicación más frecuente. Predominaron como factores de riesgo asociados la hipertensión arterial, las dislipidemias, el hábito de fumar y la diabetes mellitus.

  14. COMPARTIMENTAÇÃO DE UNIDADES GEOMORFOLÓGICAS DO MUNICÍPIO DE AGUDO-RS

    Directory of Open Access Journals (Sweden)

    Gerson Jonas Schirmer

    2013-12-01

    Full Text Available Este artigo apresenta um mapeamento geomorfológico do município de Agudo-RS, onde as unidades geomorfológicas representam a integração dos elementos físicos da área de estudo, frente aos processos envolvidos na organização da paisagem local. A metodologia é fundamentada nas contribuições da ciência geográfica, utilizando como ferramenta SIGs (Sistemas de Informação Geográfica.  Através de uma representação de síntese, foram definidos cinco unidades geomorfológicas, Rampas deColúvio-Aluvio do Rio Jacuí, Rampas de Colúvio-Alúvio de Arroios, Colinas Alúvio-Coluvionar, Colinas Vulcânicas do Planalto Serra Geral e Associação de Morros e Morrotes do Rebordo do Planalto, que caracterizam a paisagem do município de Agudo.

  15. Fisiopatología, evaluación y manejo del dolor agudo en pediatría

    Directory of Open Access Journals (Sweden)

    Tatiana Pabón-Henao

    2015-12-01

    Full Text Available El manejo del dolor agudo en los niños es deficiente, como lo afirma en el 2013 un estudio de la AMA (American Medical Association: la población pediátrica recibe entre 50% y 90% menos analgésicos que los adultos, es decir, no se tiene claridad en la fisiopatología, abordaje y manejo del dolor en los niños. El dolor puede clasificarse según su tiempo de duración, intensidad y mecanismo fisiopatoló-gico que lo desencadena (nociceptivo y neuropático. Teniendo en cuenta que la fisiopatología del dolor no varía con la edad pero sí como el paciente pediátrico lo manifieste, se requiere conocer el abordaje y manejo según su intensidad. Por lo tanto, el objetivo de esta revisión se enfoca en el estado del arte y en generar claridad de los aspectos críticos como son el conocimiento de la fisiopatología, valoración adecuada y el manejo no farmacológico y farmacológico del dolor agudo en pediatría.

  16. Mapping of micro and Small branch of industrial enterprises located in the cities of Agudo and Silveira Martins – RS

    Directory of Open Access Journals (Sweden)

    Carla Hartmann Sturm

    2016-06-01

    Full Text Available In the development of a country are the companies responsible for creating jobs, pay taxes and thus cause the economic and regional development. In Brazil, most of these institutions is made up of micro enterprises and small that often struggling to survive in the market. Therefore, it is necessary investments and public incentives to encourage their development making them competitive. In this sense, this article aims to develop a mapping of micro and small enterprises in the industrial sector in the cities of Agudo and Silveira Martins – Rio Grande do Sul (RS. For this, we used a descriptive research on the purposes and literature as to the means being prepared a questionnaire for collecting data from the sample studied. As results obtained ten micro companies and three small businesses were found in Agudo – RS, and the main industries are the timber industry and the manufacture of bakery products, influenced 65.5% of the employees of micro and small companies analyzed in the municipality. Already in Silveira Martins – RS were found seven micro and small enterprises, where six are classified as micro company and only one as small business. It was found also that the main industrial branch is the timber sector (six companies, in which 96% of employees work in any activity related to wood processing.

  17. Perirectal block for out-patient anorectal surgery: A new technique Bloqueo perirrectal para cirugía anorrectal ambulatoria: una nueva técnica

    Directory of Open Access Journals (Sweden)

    Javier H. Eslava-Schmalbach

    2011-03-01

    Full Text Available Introduction. Perirectal block using four puncture places has been classically described for rectal surgery.
    Objective. This paper was aimed at showing the quality of anesthesia and postoperative analgesia using a new two-puncture-site technique.
    Materials and methods. Patients scheduled for ambulatory rectal surgery between January/2003 and December/2007 were included consecutively. The new two-puncture technique was used. Alternative anesthetic management and level of postoperative pain requirements were evaluated (rated visual analogue scale-VAS. Follow-up was done by telephone between 1st and 10th postoperative day to evaluate complications, pain (yes/no, and satisfaction level (1-5 points score.
    Results. Four hundred and nine subjects were included; 50.61% were female. Mean age was 43 (95%CI: 41-44; range: 17-85, 12.7% were aged over 60. According to the American Society of Anesthesiology (ASA, 72.6% were classified as ASA1 and 26.1% ASA2. External and internal hemorrhoidectomy was performed on 31% of patients; 61.6% had two or more procedures. Lidocaine was used on 406 subjects. Ropivacaine was added for 9.2% of them and levobupivacaine for 89.4%. 394 patients were followed-up. Median follow-up was 4 days. A response was obtained from 346 subjects (84.6%; 105 (30.3% recalled having suffered pain during the post-operative period, being most frequent in the lidocaine+ropivacaine group (17/39, 43.5% than in the lidocaine+bupivacaine group (88/307, 28.6%. Satisfaction was evaluated by 336 subjects (82.1%, 332 of them (98.8% awarding a score of 5. Two subjects (0.6% scored this 2 and 1. Subjects did not mention complications.
    Conclusions. The new peri-rectal two-puncture block technique is easy and also provides analgesia and a high degree of satisfaction.

    Introducción. El bloqueo perirrectal de cuatro punciones ha sido descrito clásicamente para cirugía rectal. El objetivo de este artículo es describir la calidad de

  18. Angular Positioning Sensor for Space Mechanisms

    Science.gov (United States)

    Steiner, Nicolas; Chapuis, Dominique

    2013-09-01

    Angular position sensors are used on various rotating mechanisms such as solar array drive mechanisms, antenna pointing mechanisms, scientific instruments, motors or actuators.Now a days, potentiometers and encoders are mainly used for angular measurement purposes. Both of them have their own pros and cons.As alternative, Ruag Space Switzerland Nyon (RSSN) is developing and qualifying two innovative technologies of angular position sensors which offer easy implementation, medium to very high lifetime and high flexibility with regards to the output signal shape/type.The Brushed angular position sensor uses space qualified processes which are already flying on RSSN's sliprings for many years. A large variety of output signal shape can be implemented to fulfill customer requirements (digital, analog, customized, etc.).The contactless angular position sensor consists in a new radiation hard Application Specific Integrated Circuit (ASIC) based on the Hall effect and providing the angular position without complex processing algorithm.

  19. Oral candidiasis and angular cheilitis.

    Science.gov (United States)

    Sharon, Victoria; Fazel, Nasim

    2010-01-01

    Candidiasis, an often encountered oral disease, has been increasing in frequency. Most commonly caused by the overgrowth of Candida albicans, oral candidiasis can be divided into several categories including acute and chronic forms, and angular cheilitis. Risk factors for the development of oral candidiasis include immunosuppression, wearing of dentures, pharmacotherapeutics, smoking, infancy and old age, endocrine dysfunction, and decreased salivation. Oral candidiasis may be asymptomatic. More frequently, however, it is physically uncomfortable, and the patient may complain of burning mouth, dysgeusia, dysphagia, anorexia, and weight loss, leading to nutritional deficiency and impaired quality of life. A plethora of antifungal treatments are available. The overall prognosis of oral candidiasis is good, and rarely is the condition life threatening with invasive or recalcitrant disease.

  20. Angular distributions as lifetime probes

    Energy Technology Data Exchange (ETDEWEB)

    Dror, Jeff Asaf; Grossman, Yuval [Department of Physics, LEPP, Cornell University,Ithaca, NY 14853 (United States)

    2014-06-27

    If new TeV scale particles are discovered, it will be important to determine their width. There is, however, a problematic region, where the width is too small to be determined directly, and too large to generate a secondary vertex. For a collection of colored, spin polarized particles, hadronization depolarizes the particles prior to their decay. The amount of depolarization can be used to probe the lifetime in the problematic region. In this paper we apply this method to a realistic scenario of a top-like particle that can be produced at the LHC. We study how depolarization affects the angular distributions of the decay products and derive an equation for the distributions that is sensitive to the lifetime.

  1. Sobrecarga en el cuidador de paciente con infarto agudo al miocardio

    Directory of Open Access Journals (Sweden)

    Norma Lizbeth Ávila Estrada

    2012-12-01

    Full Text Available Introducción: Las enfermedades cardiovasculares constituyen la primera causa de muerte en México, generando un impacto social persistente que involucra tanto a quien lo padece como a quienes lo rodean. Objetivo: Determinar el nivel de sobrecarga en el cuidador con pacientes de infarto agudo miocardio (IAM en el Hospital General de Durango. Materiales y Métodos: Estudio descriptivo no experimental, transversal; 54 familiares de pacientes hospitalizados con diagnóstico de IAM en el Hospital General Durango, no probabilístico por conveniencia. Resultados: La edad promedio en el estudio es de 18 a 25 años correspondiendo al 37%, de los cuales el 66.7% es femenino, 59.3% tiene escolaridad de medios superior, el 72.2% son de procedencia de la ciudad de Durango, con respecto al parentesco del cuidador con la persona que demanda cuidado esta es en su mayoría hijo con un porcentaje de 20.4%; también un alto porcentaje 81.5 % convive con el enfermo y un 63.0% trabaja fuera del hogar, y un 27.8% ha dejado el trabajo parcialmente; el resultado revelo que existe un nivel medio de sobrecarga del 44.2% en el cuidador primario. Discusión y Conclusiones: Son identificables los niveles de sobrecarga en cuidadores de pacientes con IAM generando una serie de variables que alteran la relación cuidador-paciente trayendo consigo una sobrecarga de tipo medio. (Rev Cuid 2012;3(3:342-8.Palabras clave: Cuidados Posteriores, Absentismo Familiar, Atención no Remunerada. (Fuente: DeCS BIREME.

  2. EJERCICIO Y LA DETECCION DEL MAL AGUDO DE MONTAÑA GRAVE

    Science.gov (United States)

    Garófoli, Adrián; Montoya, Paola; Elías, Carlos; Benzo, Roberto

    2012-01-01

    El Mal Agudo de Montaña (MAM) es un conjunto de síntomas inespecíficos padecidos por sujetos que ascienden rápidamente desde baja a alta altura sin adecuada aclimatación. Usualmente es autolimitado, pero las formas graves (edema pulmonar y cerebral) pueden causar la muerte. La hipoxemia exagerada en reposo está relacionada con el desarrollo de MAM pero su valor predictivo es limitado. Dado que el ejercicio en altura se acompaña de mayor hipoxemia y síntomas, postulamos el valor predictivo de un simple test de ejercicio para pronosticar MAM grave. Se estudió el valor predictivo de la saturación de oxígeno en reposo y ejercicio submáximo a 2 700m y 4 300m en 63 sujetos que ascendían al cerro Aconcagua (6 962m). Se consideró desaturación de oxígeno con ejercicio a una disminución >=5% respecto al reposo. Se utilizó la escala de Lake-Louise para establecer la presencia de MAM grave. 6 sujetos presentaron MAM grave (9.5%) y requirieron evacuación. La saturación de oxígeno en reposo a 2 700m no fue significativa para clasificar sujetos que luego desarrollaron MAM grave. Por el contrario, la asociación de desaturación durante el ejercicio a 2 700m más la saturación inapropiada en reposo a 4 300m fue significativa para clasificar a los sujetos que desarrollaron MAM grave con un valor predictivo positivo de 80% y un valor predictivo negativo del 97%. Nuestros resultados son relevantes para el montañismo y sugieren la adición de un simple test de ejercicio en la predicción del MAM grave. PMID:20228017

  3. EFECTO AGUDO DEL EJERCICIO FISICO EN LA INTELIGENCIA Y LA MEMORIA EN HOMBRES, SEGUN LA EDAD

    Directory of Open Access Journals (Sweden)

    Yorleny Alfaro Chavarría

    2001-12-01

    Full Text Available Con muy diversas investigaciones se han demostrado los efectos agudos del ejercicio físico en los procesos cognitivos (memoria, inteligencia, tiempo de reacción, creatividad, etc. según la edad. Sin embargo, gran cantidad de variables se ven involucradas en los diferentes tratamientos. Es, por esto, que se pretendió realizar una investigación específica y homogénea, de manera que los cambios obtenidos en la inteligencia y la memoria en las diferentes edades se deban al tratamiento en sí, y no a la influencia de otros factores. Para esto, se aplicó un tratamiento que consistió en realizar ejercicio aeróbico subiendo y bajando una grada de 27 cm. de alto x 30 cm. de ancho, durante 10 minutos, a una intensidad del 60% de la frecuencia cardíaca máxima. Los sujetos fueron 100 hombres con edades entre la niñez y la edad avanzada. Se ubicaron en 5 subgrupos que realizaron un 'pretest', el tratamiento indicado y un 'postest'. Las pruebas fueron el test de Raven para la inteligencia y el Verbal Script Digit Span para medir la memoria auditiva. Para conocer los resultados se realizó un análisis de varianza Anova 5x2x2 para grupos independientes, utilizando los puntajes obtenidos en las diferencias entre 'pretest' y 'postest', para ambas variables, con su respectivo 'post-hoc' en los casos requeridos. Y para determinar la magnitud del cambio, se obtuvo los tamaños del efecto. Se encontró que con ejercicio aeróbico submaximal, la totalidad de los grupos etarios mejoraron sus resultados en el test de memoria con mejor resultado los de edades promedio de 25.5 y 63.25 años. Para la variable de inteligencia los sujetos de 34.75 y 52.4 años en promedio lograron los mejores resultados, mientras que los jóvenes de 25.5 años y los adultos mayores no tuvieron cambio significativo en este aspecto.

  4. 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

  5. Orbital angular momentum in phase space

    International Nuclear Information System (INIS)

    Rigas, I.; Sanchez-Soto, L.L.; Klimov, A.B.; Rehacek, J.; Hradil, Z.

    2011-01-01

    Research highlights: → We propose a comprehensive Weyl-Wigner formalism for the canonical pair angle-angular momentum. → We present a simple and useful toolkit for the practitioner. → We derive simple evolution equations in terms of a star product in the semiclassical limit. - Abstract: A comprehensive theory of the Weyl-Wigner formalism for the canonical pair angle-angular momentum is presented. Special attention is paid to the problems linked to rotational periodicity and angular-momentum discreteness.

  6. Management of Angular Cheilitis in children

    Directory of Open Access Journals (Sweden)

    Fajriani Fajriani

    2017-04-01

    Full Text Available Objective : Angular cheilitis is a type of oral soft tissue disease that can occur in children and adults, the condition is characterized by cracks and inflammation on both corners of the mouth. Although this disease can not cause severe disorder, it quite disturbs one's activity and physical appearance. Mild Angular cheilitis will recover itself over times. However severe conditions can cause pain and bleeding. This paper aims to inform colleagues about management of angular cheilitis in children.

  7. Management of angular cheilitis for children

    Directory of Open Access Journals (Sweden)

    Fajriani Fajriani

    2016-06-01

    Full Text Available Angular cheilitis is one type of oral soft tissue disease that can occur in both children and adults, the condition is characterized by cracks and inflammation in both corners of the mouth. Although this disease does not cause severe disruption but quite disturbing activity and also one's physical appearance. Angular cheilitis light will disappear on their own over time.Severe conditions that can cause pain and bleading. aims to give feedback on peers about managment angular cheilitis in children.

  8. AngularJS Performance: A Survey Study

    OpenAIRE

    Ramos, Miguel; Valente, Marco Tulio; Terra, Ricardo

    2017-01-01

    AngularJS is a popular JavaScript MVC-based framework to construct single-page web applications. In this paper, we report the results of a survey with 95 professional developers about performance issues of AngularJS applications. We report common practices followed by developers to avoid performance problems (e.g., use of third-party or custom components), the general causes of performance problems in AngularJS applications (e.g., inadequate architecture decisions taken by AngularJS users), a...

  9. Manejo anestésico para la cirugía urgente traumatológica en miembro superior en una gestante de 23 semanas: rol del bloqueo ecoguiado del plexo braquial mediante abordaje infraclavicular. Reporte de caso

    OpenAIRE

    Guerrero-Domínguez, Rosana; López-Herrera-Rodríguez, Daniel; Fernández-López, Jesús; Luengo, Ángeles; Jiménez, Ignacio

    2014-01-01

    Describimos el tratamiento anestésico de una mujer de 34 años en su 23 semana de gestación con una lesión vascular y tendinosa de antebrazo que requirió una reparación quirúrgica urgente. El bloqueo nervioso del plexo braquial evita el riesgo potencial de intubación fallida y de broncoaspiración, además de reducir la exposición fetal a fármacos potencialmente teratógenos. Mientras sea posible una técnica anestésica regional, debería ser usada. Si es inevitable una anestesia general, se requie...

  10. Transverse and longitudinal angular momenta of light

    Energy Technology Data Exchange (ETDEWEB)

    Bliokh, Konstantin Y., E-mail: k.bliokh@gmail.com [Center for Emergent Matter Science, RIKEN, Wako-shi, Saitama 351-0198 (Japan); Nonlinear Physics Centre, RSPhysE, The Australian National University, Canberra, ACT 0200 (Australia); Nori, Franco [Center for Emergent Matter Science, RIKEN, Wako-shi, Saitama 351-0198 (Japan); Physics Department, University of Michigan, Ann Arbor, MI 48109-1040 (United States)

    2015-08-26

    We review basic physics and novel types of optical angular momentum. We start with a theoretical overview of momentum and angular momentum properties of generic optical fields, and discuss methods for their experimental measurements. In particular, we describe the well-known longitudinal (i.e., aligned with the mean momentum) spin and orbital angular momenta in polarized vortex beams. Then, we focus on the transverse (i.e., orthogonal to the mean momentum) spin and orbital angular momenta, which were recently actively discussed in theory and observed in experiments. First, the recently-discovered transverse spin  angular momenta appear in various structured fields: evanescent waves, interference fields, and focused beams. We show that there are several kinds of transverse spin angular momentum, which differ strongly in their origins and physical properties. We describe extraordinary features of the transverse optical spins and overview recent experiments. In particular, the helicity-independent transverse spin inherent in edge evanescent waves offers robust spin–direction coupling at optical interfaces (the quantum spin Hall effect of light). Second, we overview the transverse orbital angular momenta of light, which can be both extrinsic and intrinsic. These two types of the transverse orbital angular momentum are produced by spatial shifts of the optical beams (e.g., in the spin Hall effect of light) and their Lorentz boosts, respectively. Our review is underpinned by a unified theory of the angular momentum of light based on the canonical momentum and spin densities, which avoids complications associated with the separation of spin and orbital angular momenta in the Poynting picture. It allows us to construct a comprehensive classification of all known optical angular momenta based on their key parameters and main physical properties.

  11. Decúbito prono en pacientes con síndrome de distrés respiratorio agudo

    Directory of Open Access Journals (Sweden)

    Mariano Setten

    Full Text Available RESUMEN El síndrome de distrés respiratorio agudo ocupa gran atención en la unidad de cuidados intensivos. A pesar del amplio conocimiento alcanzado sobre la fisiopatología de éste síndrome, el enfoque en la unidad de cuidados intensivos consiste, en gran parte, en un tratamiento de soporte vital y en evitar los efectos secundarios de las terapéuticas invasivas. Si bien, durante los últimos 20 años, se generaron grandes avances en ventilación mecánica con un impacto importante sobre la mortalidad, ésta continúa siendo elevada. Una característica de los pacientes con síndrome de distrés respiratorio agudo, sobre todo los más severos, es la presencia de hipoxemia refractaria debido a la existencia de shunt, pudiendo requerir tratamientos adicionales a la ventilación mecánica, entre ellos la ventilación mecánica en decúbito prono. Este método, recomendado para mejorar la oxigenación por primera vez en 1974, puede ser implementado fácilmente en cualquier unidad de cuidados intensivos con personal entrenado. El decúbito prono tiene un sustento bibliográfico sumamente robusto. Varios ensayos clínicos randomizados han demostrado el efecto del decúbito prono sobre la oxigenación en pacientes con síndrome de distrés respiratorio agudo medida a través de la relación PaO2/FiO2 e incluso su impacto en el aumento de la sobrevida de estos pacientes. Los integrantes del Comité de Kinesiología Intensivista de la Sociedad Argentina de Terapia Intensiva realizaron una revisión narrativa con el objetivo de exponer la evidencia disponible en relación a la implementación del decúbito prono, los cambios producidos en el sistema respiratorio por la aplicación de la maniobra y su impacto sobre la mortalidad. Por último, se sugerirán lineamientos para la toma de decisiones.

  12. Diagnósticos de enfermería al alta hospitalaria en personas con Síndrome Coronario Agudo

    Directory of Open Access Journals (Sweden)

    Clara Inés Padilla García

    2017-04-01

    Full Text Available Introducción: Enfermería juega un rol fundamental en las diferentes etapas de la atención de las personas con síndrome coronario agudo, entre ellas el egreso hospitalario. Brindar cuidado acorde a las necesidades propias de estas personas, requiere de la identificación de los principales diagnósticos de enfermería. Objetivo: Determinar la prevalencia de diagnósticos de Enfermería de las personas con síndrome coronario agudo al momento del alta hospitalaria. Metodología: Estudio de corte transversal en 196 personas hospitalizadas por el evento de interés, se utilizó instrumento de valoración focalizada que evaluaba las características definitorias de los diagnósticos de enfermería: ansiedad, afrontamiento ineficaz, disposición para mejorar la religiosidad, disposición para mejorar los conocimientos, intolerancia a la actividad; los cuales fueron identificados como prioritarios según la literatura científica y por consenso de expertos. Para determinar la prevalencia de los diagnósticos se realizó análisis de definición y características definitorias. Resultados: Se evidenció como principal problema de la población de estudio los conocimientos deficientes, seguido de la intolerancia a la actividad y la ansiedad. De igual forma se logró identificar diagnósticos positivos como la disposición para mejorar los conocimientos y la religiosidad. Conclusiones: El presente trabajo nos permitió identificar necesidades reales y reconocer factores protectores al momento del alta hospitalaria en personas que han vivido un evento coronario agudo, lo cual constituye un punto de partida para el diseño de planes de cuidado y la puesta en marcha de intervenciones que conduzcan a mejorar la situación de salud de este grupo de personas.

  13. ANALISIS COSTE-EFECTIVIDAD DE DISTINTOS MÉTODOS DE DIAGNÓSTICO POR IMAGEN DEL TROMBOEMBOLISMO PULMONAR AGUDO

    Directory of Open Access Journals (Sweden)

    Stella Maris Batallés

    2009-01-01

    Full Text Available La técnica diagnóstica óptima para detectar tromboembolismo pulmonar agudo (TEP continúa en discusión. La gammagrafía pulmonar de ventilación/perfusión ha sido el examen preferido durante décadas, pero con el advenimiento de nuevas pruebas de imágenes las posibilidades diagnósticas se ampliaron, siendo necesario evaluarlas desde la perspectiva del coste y de la efectividad. El objetivo de este trabajo fue evaluar distintos métodos de diagnóstico por imagen para detectar TEP agudo para determinar el más coste-efectivo. Métodos. Análisis de coste-efectividad (CE empleando un árbol de decisiones para modelar distintas pruebas (centellograma V/Q, TC helicoidal, angiografía por tomografía computada multidetector (TCMD, resonancia magnética por imágenes (RMI y arteriografía convencional. Se obtuvieron valores de sensibilidad, especificidad, valor predictivo positivo (VPP y negativo (VPN de las pruebas diagnósticas. Resultado medido: "caso detectado de TEP". Los costes evaluados fueron los directos, expresados en euros (t, incluyendo los secundarios a las complicaciones de los métodos diagnósticos. Se realizó un análisis de sensibilidad de una vía para evaluar la robustez de las conclusiones. Resultados. No se eliminaron pruebas por dominancia extendida. La tasa cruda de CE para TCMD fue de 486 t por cada caso de TEP detectado. El coste marginal entre la TC helicoidal y el centellograma V/Q fue de 103 t para detectar 8 casos adicionales de TEP, mientras que el coste marginal entre la TCMD y la TC helicoidal fue de 229 t para detectar un caso adicional de TEP. Conclusiones. La prueba diagnóstica más coste-efectiva fue la TCMD, hallazgo que mostró robustez en el análisis de sensibilidad. Sin embargo, el análisis de C-E incremental nos mostró que la TCMD costó 229 t más respeto a la TC helicoidal para lograr una mínima mejora en la efectividad de la prueba (detección de TEP agudo. El alto valor predictivo negativo de

  14. Qualidade de vida de clientes pós-infarto agudo do miocárdio Calidad de vida de los clientes pós-infarto agudo del miocardio Client's quality of life after myocardial infarction

    Directory of Open Access Journals (Sweden)

    Joselany Afio Caetano

    2007-03-01

    Full Text Available Objetivou-se neste estudo avaliar a qualidade de vida de clientes que sofreram infarto agudo do miocárdio. A amostra constou de 30 clientes selecionados pela busca em prontuários de uma unidade cardiológica, que nos permitiu a identificação e localização desses clientes, internados no ano de 2004. Para coleta de dados utilizamos a Escala de Qualidade de Vida de Flanagan e o tratamento estatístico com desvio-padrão. Os resultados mostraram maior índice de respostas nos níveis "indiferentes" a "pouco satisfeitos" em suas qualidades de vida. A relação interpessoal apresentou o mais alto índice de satisfação, contrariando o bem-estar físico e material, com o mais baixo índice de satisfação. Concluiu-se que a avaliação da qualidade de vida de clientes que sofreram infarto agudo do miocárdio se mostra comprometida, o que vem corroborar outros estudos anteriormente realizados.El objetivo del estudio fue evaluar la calidad de vida de los clientes que han sufrido infarto agudo del miocardio. La muestra ha consistido de 30 pacientes escogidos por la búsqueda en historias clínicas de una unidad cardiológica, que nos permitió la identificación y localización de estos clientes, internados en el año 2004. Para la colecta de los datos utilizamos la Escala de Calidad de Vida de Flanagan y el tratamiento estadístico con desvío medio. Los resultados muestran mayor índice de respuestas en los niveles "indiferentes" a "poco satisfechos" en sus calidades de vida. La relación interpersonal presentó el más alto índice de satisfacción, contrariando el bienestar físico y material, con el más bajo índice de satisfacción. Ha concluído que la evaluación de la calidad de vida de clientes que sufrieron infarto agudo del miocardio muéstrase comprometida, lo que viene a confirmar otros estudios anteriormente realizados.This study evaluates the quality of life of clients who suffered myocardial infarction. The sample consisted of 30

  15. Experimental determination of high angular momentum states

    International Nuclear Information System (INIS)

    Barreto, J.L.V.

    1985-01-01

    The current knowledge of the atomic nucleus structure is summarized. A short abstract of the nuclear properties at high angular momentum and a more detailed description of the experimental methods used in the study of high angular momenta is made. (L.C.) [pt

  16. Exposing Library Services with AngularJS

    OpenAIRE

    Jakob Voß; Moritz Horn

    2014-01-01

    This article provides an introduction to the JavaScript framework AngularJS and specific AngularJS modules for accessing library services. It shows how information such as search suggestions, additional links, and availability can be embedded in any website. The ease of reuse may encourage more libraries to expose their services via standard APIs to allow usage in different contexts.

  17. Accelerated rotation with orbital angular momentum modes

    CSIR Research Space (South Africa)

    Schulze, C

    2015-04-01

    Full Text Available . As the angular acceleration takes place in a bounded space, the azimuthal degree of freedom, such fields accelerate periodically as they propagate. Notably, the amount of angular acceleration is not limited by paraxial considerations, may be tailored for large...

  18. Responsive web design with AngularJS

    CERN Document Server

    Patel, Sandeep Kumar

    2014-01-01

    If you are an AngularJS developer who wants to learn about responsive web application development, this book is ideal for you. Responsive Web Design with AngularJS is intended for web developers or designers with a basic knowledge of HTML, CSS, and JavaScript.

  19. Angular momentum projected wave-functions

    International Nuclear Information System (INIS)

    Bengtsson, R.; Haakansson, H.B.

    1978-01-01

    Angular momentum projection has become a vital link between intrinsic model-wavefunctions and the physical states one intends to describe. We discuss in general terms some aspects of angular momentum projection and present results from projection on e.g. cranking wavefunctions. Mass densities and spectroscopic factors are also presented for some cases. (author)

  20. Concepts of radial and angular kinetic energies

    DEFF Research Database (Denmark)

    Dahl, Jens Peder; Schleich, W.P.

    2002-01-01

    We consider a general central-field system in D dimensions and show that the division of the kinetic energy into radial and angular parts proceeds differently in the wave-function picture and the Weyl-Wigner phase-space picture, Thus, the radial and angular kinetic energies are different quantities...

  1. Perturbed angular correlations and distributions

    International Nuclear Information System (INIS)

    Makaryunas, K.

    1976-01-01

    The present index comprises original works and review papers on the perturbed angular correlations (PAC) and distributions (PAD). The articles published in the Soviet and foreign journals as well as the materials of conferences, monographs and collections published in the USSR and abroad, the preprints produced by various institutes and abstracts of disertations are included from 1948 up to 1973. The whole material compiled in this index is divided into three parts. Part one is a bibliographic index. All papers in this part are divided into three sections. Section one comprises the papers devoted to the theoretical works on PAC, review papers, monographs, materials of conferences. Section two deals with the works of methodical character where correlation spectrometers as well as the treatment of experimental data are described. In section three experimental works with concrete nuclei are compiled. Part two gives the characteristic of works performed with concrete nuclei. This part is presented in the form of the table in which the works are systematized according to the chemical elements and isotopes. The table shows the characteristics of the nuclear levels used in the investigations by PAC as well as brief characteristics of experiments and results obtained. Part three - appendix contains alphabetic index of the authors, the list of the used editions with the abbreviations of the titles of these editions. The lists indicating the dynamic of the quantity of works on PAC and the distribution according to the literature sources are also given

  2. Angular correlation in positron annihilation

    International Nuclear Information System (INIS)

    Arponen, J.; Pajanne, E.

    1978-01-01

    The angular correlation of the two gamma quanta emitted when a thermalized positron annihilates with metallic conduction electrons is investigated by applying the newly developed theory of electron gas as a system of interacting collective excitations. The method leads in a natural way to the appearance of high-momentum components (i.e. pair momentum p>psub(F) in the annihilation radiation already in the case of annihilation with conduction electrons only. The amount of these components is significant approximately (10 %) in a dilute electron gas (like alkali metals), but fairly irrelevant for higher densities. The momentum-dependence of the enhancement factor for a dense system (with rsub(s) approximately equal to 2) agrees well both with the earlier theories due to Kahana and others, and also with recent accurate experimental observations. As rsub(s) increases into the alkali-metal region, the enhancement factor for p< psub(F) becomes relatively more and more constant, in contrast with the trend in the Kahana theory. In this density regime the experimental results seem to vary widely, although most of them desagree with the present prediction. We discuss the possible discrepancy and try to account for the effects of the core annihilation by a simple model. (author)

  3. Efeito Agudo da Pressao Positiva Continua sobre a Pressao de Pulso na Insuficiencia Cardiaca Cronica

    Directory of Open Access Journals (Sweden)

    Monica Quintao

    2014-03-01

    Full Text Available Fundamento: Pacientes com insuficiência cardíaca (IC apresentam disfunção ventricular esquerda e redução da pressão arterial média (PAM. O aumento do estímulo adrenérgico causa vasoconstrição e resistência dos vasos, mantendo a PAM, enquanto aumenta a resistência vascular periférica e a rigidez dos vasos condutores. O aumento da pressão de pulso (PP reflete a complexa interação do coração com os sistemas arteriais e venosos. O aumento da PP é um importante marcador de risco em pacientes com insuficiência cardíaca crônica (ICC. A ventilação não invasiva (VNI tem sido utilizada para IC aguda descompensada para melhorar a congestão e a ventilação pelos efeitos respiratórios e hemodinâmicos. No entanto, nenhum desses estudos relatou o efeito da VNI na PP. Objetivo: O objetivo deste estudo foi determinar os efeitos agudos da VNI com CPAP (pressão positiva contínua nas vias aéreas sobre a PP em pacientes ambulatoriais com ICC. Métodos: Seguindo um protocolo randomizado, duplo-cego, cruzado e controlado com placebo, 23 pacientes com ICC (17 homens, 60 ± 11 anos, IMC 29 ± 5 kg/cm2, classes II e III da NYHA foram submetidos à CPAP via máscara nasal durante 30 minutos na posição reclinada. A pressão da máscara foi de 6 cmH2O, enquanto o placebo foi fixado em 0-1 cmH2O. PP e outras variáveis hemodinâmicas não invasivas foram avaliadas antes, durante e depois do placebo e do modo CPAP. Resultados: A CPAP diminuiu a frequência cardíaca de repouso (pré: 72 ± 9; pós 5 min: 67 ± 10 bpm , p < 0,01 e PAM (CPAP: 87 ± 11; controle 96 ± 11 mmHg , p < 0,05 pós 5 min. A CPAP diminuiu a PP (CPAP: 47 ± 20 pré para 38 ± 19 mmHg pós; controle: 42 ± 12 mmHg, pré para 41 ± 18 pós p < 0,05 pós 5 min. Conclusão: A VNI com CPAP diminuiu a pressão de pulso em pacientes com ICC estável. Ensaios clínicos futuros devem investigar se esse efeito está associado com melhora no desfecho clínico.

  4. EFEITO AGUDO DOS EXERCÍCIOS INTERMITENTES SOBRE A GLICEMIA DE ADOLESCENTES COM DIABETES TIPO 1

    Directory of Open Access Journals (Sweden)

    Valderi Abreu de Lima

    Full Text Available RESUMO Introdução: O exercício físico é um fator importante do tratamento do diabetes mellitus. Objetivo: Verificar o efeito agudo dos exercícios intermitentes sobre glicemia e oxidação de substratos energéticos em adolescentes com diabetes tipo 1. Métodos: Foram avaliados 10 adolescentes diabéticos com idade entre 10 e 15 anos. Foram avaliadas as medidas antropométricas, hemoglobina glicosilada (HbA1c, VO2máx e o teste de exercício intermitente. Nesse teste, os indivíduos permaneceram pedalando por 30 minutos em cicloergômetro com carga de 60% do VO2máx, intercalados com tiros de intensidades máximas de 10 segundos a cada 5 minutos. Os substratos energéticos foram avaliados durante o teste e a glicemia capilar foi medida antes, imediatamente após o exercício e 30 minutos depois. Foi observada redução média da glicemia de 39,2 ± 41,92 mg/dl, isto é, média de 21,61% da glicemia inicial. Ocorreu diferença significativa (0,0001 entre os substratos energéticos oxidados, com predominância da utilização de CHO. Há uma forte correlação direta entre a HbA1c e o escore z do IMC (r = 0,821, p = 0,004 e entre HbA1c e glicose observadas pós-exercício (r = 0,702, p = 0,024 e também há forte correlação entre os níveis de glicose pré-exercício e pós-exercício (r = 0,851, p = 0,002 e entre pós-exercício e 30 minutos depois do exercício (r = 0,874, p = 0,001. O teste de regressão linear mostrou que o escore z do IMC explica 67% dos valores de HbA1c (r² = 0,675. Resultados: De acordo com os resultados observados, 30 minutos de exercícios aeróbicos intermitentes intercalados com tiros curtos de 10 segundos promovem redução média de 21% da glicemia, com tendência de aumento na fase de recuperação. O substrato energético predominante na atividade são os carboidratos (CHO. Conclusão: Quanto melhor for o escore z do IMC do adolescente, espera-se melhor controle glicêmico em adolescentes com diabetes tipo 1.

  5. Beriberi cardiovascular agudo (Shoshin-Beriberi Acute cardiovascular beriberi (shoshin-beriberi

    Directory of Open Access Journals (Sweden)

    Osvaldo D. López Gastón

    2002-08-01

    Full Text Available El beriberi, la deficiencia de tiamina (B1, fue referido en el siglo XVII en la literatura asiática, y pue de manifestarse por síntomas neurológicos (beriberi «seco» donde la neuropatía periférica y la debilidad muscular son los más destacados y/o síntomas cardiovasculares (beriberi «húmedo», con una variante «clásica» donde es predominante la insuficiencia cardíaca derecha con índice cardíaco (IC normal o alto y otra aguda o «shoshin-beriberi», caracterizada por insuficiencia biventricular, acidosis láctica e IC variable y que sin tratamiento precoz evoluciona al colapso vascular y la muerte. Se presenta una paciente de 58 años y antecedente de enolismo, con disnea, oliguria, sígnos de fallo cardíaco biventricular con patrón hiperdinámico, acidosis metabólica, disfunción tubular renal y lactacidemia de 5.6 mEq/L. El exámen neurológico mostró una polineuropatía sensitiva, simétrica y distal en MMII y deterioro cognitivo con sígnos frontales. Horas después de la administración de 100 mg de tiamina ev. se observó una manifiesta mejoría de los valores hemodinámicos y el estado ácido-base. Se concluye que si bien el beriberi cardiovascular agudo es de presentación infrecuente hay consenso en que además es subdiagnosticado. La presencia de acidosis láctica o cuadro de insuficiencia cardíaca de alto volumen minuto sin etiología manifiesta, en pacientes con riesgo de deficiencia de B1, es suficiente para hacer la prueba terapéutica.Beriberi (BB, thiamine deficiency, has been described in the Asian literature in the 17th century and is characterized by peripheral neuropathy and muscle weakness, also called «dry» beriberi (BB to differentiate it from «wet» BB, with essentially cardiovascular manifestations. Wet can be either «classic» wet BB in which signs and symptons of right-sided heart failure with normal or high cardiac output are the presenting features or the «shoshin» BB variant with severe

  6. ESTRUTURA E VÍNCULOS DE UMA FAMÍLIA APÓS INFARTO AGUDO DO MIOCÁRDIO

    OpenAIRE

    Garcia, Raquel Pötter; Budó, Maria de Lourdes Denardin; Viegas, Aline da Costa; Cardoso, Daniela Habekost; Schwartz, Eda; Muniz, Rosani Manfrin

    2015-01-01

    Introdução: Conhecer os vínculos e a estrutura de uma família após episódio de Infarto Agudo do Miocárdio. Materiais e Métodos: Pesquisa qualitativa e exploratória que representa um estudo de caso desenvolvido com uma das famílias participantes. A coleta de dados ocorreu no período de fevereiro a maio de 2012, por meio de observação no domicílio e entrevista com construção do genograma e ecomapa. A intensidade dos vínculos foi definida pela família conforme legenda do ecomapa. Resultados e Di...

  7. Efeitos agudos do exercício resistido sobre marcadores da resposta inflamatória e imune

    OpenAIRE

    Guilherme Borges Pereira

    2012-01-01

    O objetivo dos pesquisadores do presente estudo foi examinar os efeitos agudos do Exercício Resistido (ER) sobre a apoptose (Anexina V+) e a migração (CX3CR1) de linfócitos T CD4+ e CD8+. 12 sujeitos adultos realizaram duas sessões de ER (3 séries em 9 exercícios) com 1 minuto (Hiper-1) e 3 minutos (Hiper-3) de intervalo entre as séries e exercícios. Não foi observada alteração significativa na contagem celular de linfócitos CD4+ e CD8+ após os protocolos Hiper-1 e Hiper-3 (p > 0,05). Foi obs...

  8. SÍNDROME CORONARIO AGUDO DE CAUSA NO ATEROESCLERÓTICA / Acute coronary syndrome of non-atherosclerotic origin

    Directory of Open Access Journals (Sweden)

    Yuri Medrano Plana

    2013-10-01

    Full Text Available Resumen La embolia coronaria es una causa poco frecuente de síndrome coronario agudo. Dentro de los varios tipos de material embólico se encuentra el de origen tumoral. Estos émbolos pueden ocasionar isquemia miocárdica de intensidad variable, desde angina de pecho hasta infarto agudo de miocardio o incluso, muerte súbita. Se presenta una mujer de 58 años de edad, que presentó episodios de angina inestable con cambios eléctricos sin factores de riesgo y sin antecedentes de cardiopatía isquémica, que en la coronariografía se demostró la presencia de arterias coronarias normales. El ecocardiograma transesofágico informó imagen ecogénica polilobulada y pediculada hacia la superficie septal de la aurícula izquierda (posible mixoma, sin observarse trombos en las cavidades cardíacas. La paciente fue operada (exéresis quirúrgica del tumor, evolucionó favorablemente y fue trasladada a su hospital de origen 72 horas después. / Abstract Coronary embolism is a rare cause of acute coronary syndrome. Among the various types of embolic material is that of tumoral origin. These emboli can cause myocardial ischemia of varying intensity, from angina to acute myocardial infarction or even sudden death. The case of a 58-year-old woman who presented unstable angina episodes with electrical changes with no risk factors and no history of ischemic heart disease is presented. By means of coronary angiography, the presence of normal coronary arteries was showed. Transesophageal echocardiography showed the echogenic polylobulated and pedicled image towards the septal surface of the left atrium (possible myxoma; thrombi in the cardiac chambers were not observed. The patient underwent surgery (surgical removal of the tumor, had a good progress and was transferred to her hospital of origin 72 hours later.

  9. O que todo intensivista deve saber a respeito da síndrome do desconforto respiratório agudo e dano alveolar difuso?

    Directory of Open Access Journals (Sweden)

    Fernando Rios

    2017-09-01

    Full Text Available RESUMO A síndrome do desconforto respiratório agudo é um desafio para o intensivista. A característica principal desta doença aguda é o dano alveolar difuso, presente em cerca de metade dos pacientes com a síndrome. É claro que o suporte respiratório à síndrome do desconforto respiratório agudo tem melhorado gradualmente nas últimas décadas. É também evidente que todos estes procedimentos são benéficos, já que reduzem a lesão pulmonar e mantêm o paciente vivo. Isto deve ser interpretado como uma estratégia de ganho de tempo, até que o fator desencadeante ou de risco causal melhore, assim como a tempestade inflamatória diminua e o pulmão se cure. Por outro lado, todos - exceto dois tratamentos farmacológicos (bloqueadores neuromusculares e esteroides - são incapazes de melhorar o desfecho da síndrome do desconforto respiratório agudo. A hipótese de que os resultados farmacológicos negativos podem ser explicados pela heterogeneidade histológica da síndrome do desconforto respiratório agudo tem sido apoiada pelas recentes demonstrações de que a síndrome com dano alveolar difuso tem característica clínico-patológica específica. O dano alveolar difuso é um diagnóstico patológico, e a biópsia pulmonar a céu aberto (a técnica mais comum para obtenção de tecido pulmonar tem efeitos colaterais graves, sendo necessário que se desenvolvam biomarcadores substitutos para o dano alveolar difuso. O objetivo desta revisão é discutir três tópicos relacionados à síndrome do desconforto respiratório agudo: o relacionamento entre a síndrome do desconforto respiratório agudo e o dano alveolar difuso; como o dano alveolar difuso pode ser representado no quadro clínico; e como o enriquecimento pode melhorar os resultados de estudos clínicos farmacológicos realizados com pacientes com a síndrome e com dano alveolar difuso.

  10. Angular momentum conservation for uniformly expanding flows

    International Nuclear Information System (INIS)

    Hayward, Sean A

    2007-01-01

    Angular momentum has recently been defined as a surface integral involving an axial vector and a twist 1-form, which measures the twisting around the spacetime due to a rotating mass. The axial vector is chosen to be a transverse, divergence-free, coordinate vector, which is compatible with any initial choice of axis and integral curves. Then a conservation equation expresses the rate of the change of angular momentum along a uniformly expanding flow as a surface integral of angular momentum densities, with the same form as the standard equation for an axial Killing vector, apart from the inclusion of an effective energy tensor for gravitational radiation

  11. Staggering of angular momentum distribution in fission

    Science.gov (United States)

    Tamagno, Pierre; Litaize, Olivier

    2018-03-01

    We review here the role of angular momentum distributions in the fission process. To do so the algorithm implemented in the FIFRELIN code [?] is detailed with special emphasis on the place of fission fragment angular momenta. The usual Rayleigh distribution used for angular momentum distribution is presented and the related model derivation is recalled. Arguments are given to justify why this distribution should not hold for low excitation energy of the fission fragments. An alternative ad hoc expression taking into account low-lying collectiveness is presented as has been implemented in the FIFRELIN code. Yet on observables currently provided by the code, no dramatic impact has been found. To quantify the magnitude of the impact of the low-lying staggering in the angular momentum distribution, a textbook case is considered for the decay of the 144Ba nucleus with low excitation energy.

  12. Amplitude damping channel for orbital angular momentum

    CSIR Research Space (South Africa)

    Dudley, Angela L

    2010-03-01

    Full Text Available Since the pioneering work on the entanglement of the orbital angular momentum (OAM) states of light, much attention has been devoted to the subject, with particular attention into the quantum aspects of information processing using OAM. Furthermore...

  13. Radiofrequency encoded angular-resolved light scattering

    DEFF Research Database (Denmark)

    Buckley, Brandon W.; Akbari, Najva; Diebold, Eric D.

    2015-01-01

    The sensitive, specific, and label-free classification of microscopic cells and organisms is one of the outstanding problems in biology. Today, instruments such as the flow cytometer use a combination of light scatter measurements at two distinct angles to infer the size and internal complexity...... of cells at rates of more than 10,000 per second. However, by examining the entire angular light scattering spectrum it is possible to classify cells with higher resolution and specificity. Current approaches to performing these angular spectrum measurements all have significant throughput limitations...... Encoded Angular-resolved Light Scattering (REALS), this technique multiplexes angular light scattering in the radiofrequency domain, such that a single photodetector captures the entire scattering spectrum from a particle over approximately 100 discrete incident angles on a single shot basis. As a proof...

  14. Orbital-angular-momentum entanglement in turbulence

    CSIR Research Space (South Africa)

    Hamadou Ibrahim, A

    2013-06-01

    Full Text Available The turbulence-induced decay of orbital-angular-momentum (OAM) entanglement between two photons is investigated numerically and experimentally. To compare our resultswith previouswork,we simulate the turbulent atmosphere with a single phase screen...

  15. Staggering of angular momentum distribution in fission

    Directory of Open Access Journals (Sweden)

    Tamagno Pierre

    2018-01-01

    Full Text Available We review here the role of angular momentum distributions in the fission process. To do so the algorithm implemented in the FIFRELIN code [?] is detailed with special emphasis on the place of fission fragment angular momenta. The usual Rayleigh distribution used for angular momentum distribution is presented and the related model derivation is recalled. Arguments are given to justify why this distribution should not hold for low excitation energy of the fission fragments. An alternative ad hoc expression taking into account low-lying collectiveness is presented as has been implemented in the FIFRELIN code. Yet on observables currently provided by the code, no dramatic impact has been found. To quantify the magnitude of the impact of the low-lying staggering in the angular momentum distribution, a textbook case is considered for the decay of the 144Ba nucleus with low excitation energy.

  16. QCD angular correlations for muon pair production

    International Nuclear Information System (INIS)

    Kajantie, K.; Raitio, R.; Lindfors, J.

    1978-01-01

    Angular distributions of muons are discussed in the framework of a QCD treatment of muon pair production in hadron-hadron collisions. The predicted angular effects are independent of the infrared behavior of QCD. Measuring them will permit one to determine whether the origin of the large transverse momentum of the pair is in the quark transverse momenta or in a constituent-constituent subprocess. (author)

  17. Mastering AngularJD for .NET developers

    CERN Document Server

    Majid, Mohammad Wadood

    2015-01-01

    This book is envisioned for traditional developers and programmers who want to develop client-side applications using the AngularJS framework and ASP.NET Web API 2 with Visual Studio. .NET developers who have already built web applications or web services and who have a fundamental knowledge of HTML, JavaScript, and CSS and want to explore single-page applications will also find this guide useful. Basic knowledge of AngularJS would be helpful.

  18. Angular Spectra of Polarized Galactic Foregrounds

    OpenAIRE

    Cho, Jung; Lazarian, A.

    2003-01-01

    It is believed that magnetic field lines are twisted and bend by turbulent motions in the Galaxy. Therefore, both Galactic synchrotron emission and thermal emission from dust reflects statistics of Galactic turbulence. Our simple model of Galactic turbulence, motivated by results of our simulations, predicts that Galactic disk and halo exhibit different angular power spectra. We show that observed angular spectra of synchrotron emission are compatible with our model. We also show that our mod...

  19. Beam Angular Divergence Effects in Ion Implantation

    International Nuclear Information System (INIS)

    Horsky, T. N.; Hahto, S. K.; Bilbrough, D. G.; Jacobson, D. C.; Krull, W. A.; Goldberg, R. D.; Current, M. I.; Hamamoto, N.; Umisedo, S.

    2008-01-01

    An important difference between monomer ion beams and heavy molecular beams is a significant reduction in beam angular divergence and increased on-wafer angular accuracy for molecular beams. This advantage in beam quality stems from a reduction in space-charge effects within the beam. Such improved angular accuracy has been shown to have a significant impact on the quality and yield of transistor devices [1,12]. In this study, B 18 H x + beam current and angular divergence data collected on a hybrid scanned beam line that magnetically scans the beam across the wafer is presented. Angular divergence is kept below 0.5 deg from an effective boron energy of 200 eV to 3000 eV. Under these conditions, the beam current is shown analytically to be limited by space charge below about 1 keV, but by the matching of the beam emittance to the acceptance of the beam line above 1 keV. In addition, results of a beam transport model which includes variable space charge compensation are presented, in which a drift mode B 18 H x + beam is compared to an otherwise identical boron beam after deceleration. Deceleration is shown to introduce significant space-charge blow up resulting in a large on-wafer angular divergence. The divergence effects introduced by wafer charging are also discussed.

  20. Efecto de un tratamiento intensivo con insulina sobre la reactividad plaquetaria en pacientes con hiperglucemia que ingresan con un síndrome coronario agudo

    OpenAIRE

    Vivas Balcones, Luis David

    2011-01-01

    El objetivo primario de este trabajo ha sido la valoración del efecto que produce el control estricto de la glucemia mediante un tratamiento intensivo y precoz con insulina sobre la reactividad plaquetaria durante la fase hospitalaria en pacientes que ingresan en una unidad de cuidados intensivos cardiológicos con un síndrome coronario agudo e hiperglucemia, respecto a un tratamiento convencional.

  1. Presencia y severidad de calcio coronario: su relación con la aparición de eventos coronarios agudos

    Directory of Open Access Journals (Sweden)

    Lázaro E. de la Cruz Avilés

    2012-03-01

    Full Text Available Fundamento: la detección de calcio en las arterias coronarias confirma la presencia de aterosclerosis y ha demostrado ser una herramienta útil para estratificar el riesgo cardiovascular. Objetivo: determinar la relación entre la presencia y severidad de calcio coronario con la aparición de eventos coronarios agudos. Métodos: se realizó un estudio observacional, descriptivo, prospectivo, tipo serie de casos, en el Hospital Universitario Dr. Gustavo Aldereguía Lima de Cienfuegos, entre enero y diciembre de 2008. La serie estuvo conformada por 137 pacientes, en los que se estudió: sexo, antecedentes patológicos personales, cifras de glucemia en ayunas, creatinina, colesterol total y triglicéridos. Los pacientes fueron seguidos durante dos años para evaluar la aparición de eventos coronarios agudos. Resultados: La edad media fue de 53,2±7,4 años, con predominio del sexo masculino (52,5 %. El mayor porciento de pacientes clasificados como de alto riesgo, según la cuantificación del calcio coronario (16,8 % perteneció al sexo masculino, predominando en los mayores de 70 años. La diabetes se relacionó de forma significativa con la severidad del puntaje de calcio. El infarto agudo del miocardio fue más frecuente en pacientes con puntaje de calcio mayor de 400 unidades Agatston. Conclusiones: la aparición de eventos coronarios agudos fue más frecuente en los pacientes de alto riesgo según cuantificación del calcio coronario.

  2. Diagnóstico automático del síndrome coronario agudo utilizando un sistema multiagente basado en redes neuronales

    Directory of Open Access Journals (Sweden)

    John Jaime Sprockel Díaz

    2017-05-01

    Conclusiones: Es posible desarrollar una herramienta para el diagnóstico automático del síndrome coronario agudo a partir de un sistema multiagente que ensamble la disposición tomada por un conjunto de redes neuronales artificiales, cuyo rendimiento permite su consideración para su implementación dentro de un sistema de soporte a las decisiones clínicas.

  3. Hematologia de tilápia-do-nilo alimentada com suplemento à base de algas frente a desafios de estresse agudo e crônico

    Directory of Open Access Journals (Sweden)

    F. Garcia

    2012-02-01

    Full Text Available Avaliou-se o efeito da suplementação com produto à base de algas, ergosan, em dietas para tilápias Oreochromis niloticus, submetidas ao desafio de estresse agudo e crônico sobre as características hematológicas. O ensaio foi realizado com tilápias jovens (15g em caixas de 500L de capacidade de estocagem, em sistema com recirculação da água, com fluxo constante, na densidade de 35 peixes por caixa. Os peixes foram alimentados com as dietas-teste durante 10 dias e, ao final deste período, voltaram a receber dieta isenta de ergosan, quando foram submetidos aos desafios de estresses agudo e crônico. Utilizou-se o delineamento inteiramente ao acaso (DIC, em esquema fatorial 4x2, sendo testados: quatro porcentagens do suplemento 0; 0,25; 0,5 e 1% de ergosan na ração em dois tipos de estresse, agudo e crônico. Os resultados permitem concluir que os estímulos de estresse aplicados foram capazes de provocar alterações fisiológicas nos peixes, incluindo redução no número de eritrócitos, eritroblastos e leucócitos e aumento do volume corpuscular médio dos eritrócitos. A administração oral de 1% de suplemento durante 10 dias para juvenis de tilápia-do-nilo, em condição de estresse agudo, induz o incremento de 69% no número de trombócitos circulantes.

  4. Bloqueio neuromuscular residual após o uso de rocurônio ou cisatracúrio Bloqueo neuromuscular residual después del uso de rocuronio o cisatracúrio Residual neuromuscular block after rocuronium or cisatracurium

    Directory of Open Access Journals (Sweden)

    Bruno Salomé de Morais

    2005-12-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio neuromuscular residual na sala de recuperação pós-anestésica (SRPA é um fenômeno que pode aumentar a morbidade pós-operatória, com incidência variando entre 0% e 93%. O objetivo deste estudo foi avaliar a incidência do bloqueio neuromuscular residual na SRPA. MÉTODO: Foram estudados 93 pacientes submetidos à cirurgia geral com o uso de cisatracúrio ou rocurônio. Após a admissão na SRPA foi realizada a monitorização objetiva da função neuromuscular (aceleromiografia - TOF GUARD. O bloqueio neuromuscular residual foi definido como SQE JUSTIFICATIVA Y OBJETIVOS: El bloqueo neuromuscular residual en la sala de recuperación posanestésica (SRPA es un fenómeno que puede aumentar la morbidez posoperatoria, con incidencia variando entre 0% y 93%. La finalidad de este estudio fue evaluar la incidencia del bloqueo neuromuscular residual en la SRPA. MÉTODO: Fueron estudiados 93 pacientes sometidos a cirugía general con el uso de cisatracúrio o rocuronio. Después de la admisión en la SRPA fue realizada la monitorización objetiva de la función neuromuscular (aceleromiografia - TOF-GUARD. El bloqueo neuromuscular residual fue definido como TOF BACKGROUND AND OBJECTIVES: Residual neuromuscular block in the post-anesthetic recovery unit (PACU may increase postoperative morbidity from 0% to 93%. This study aimed at evaluating the incidence of residual neuromuscular block in the PACU. METHODS: Participated in this study 93 patients submitted to general anesthesia with cisatracurium or rocuronium. After PACU admission, neuromuscular function was objectively monitored (acceleromyography - TOF GUARD. Residual neuromuscular block was defined as TOF < 0.9. RESULTS: From 93 patients, 53 received cisatracurium and 40 rocuronium. Demographics, procedure length and the use of antagonists were comparable between groups. Residual neuromuscular block was 32% in subgroup C (cisatracurium and 30% in subgroup R

  5. Modelos de serviços hospitalares para casos agudos em idosos Hospital services for acute care of elderly people

    Directory of Open Access Journals (Sweden)

    João Macedo Coelho Filho

    2000-12-01

    Full Text Available Embora a atenção ao idoso seja uma prioridade emergente no Brasil, pouca ênfase tem sido dada a modelos de organização de serviços hospitalares para pacientes geriátricos. São revisados modelos de serviços hospitalares para admissão e manuseio de casos agudos em idosos, com ênfase na discussão sobre o papel e o posicionamento da medicina geriátrica (incluindo sua interface com especialidades e com a clínica médica no âmbito da atenção hospitalar. Foi realizada pesquisa na base de dados Medline (1989-1999, bem como nos principais livros-texto de geriatria e de gerontologia, buscando identificar descrições de serviços hospitalares para cuidado agudo de pacientes idosos. As características dos modelos identificados foram compiladas e descritas à luz de sua adequação à realidade dos serviços de saúde no Brasil. Exemplos de intervenções em geriatria, com efetividade demonstrada através de revisões sistemáticas, foram também citadas. Os modelos mais freqüentemente relatados foram cuidado prolongado, tradicional, baseado na idade cronológica, não especializado e integrado. Adaptações e variantes de alguns desses modelos foram freqüentemente relatadas, assim como seu impacto potencial na efetividade do cuidado geriátrico. Evidências sobre o melhor modelo a seguir não foram identificadas, mas aqueles modelos favorecendo a integração da geriatria com a clínica geral pareceram mais adequados à nossa realidade. Ressalta a necessidade de reestruturação de serviços de saúde para responder às novas demandas que surgem com o envelhecimento da população, bem como do delineamento de serviços hospitalares para casos agudos, importantes para a efetividade do cuidado geriátrico e que devem ser objeto de maior debate e pesquisa no Brasil.Although the implementation of geriatric services is an emerging priority in Brazil, little emphasis has been put on the type of acute care that should be provided for elderly

  6. EFEITO AGUDO DO LASER DE BAIXA POTÊNCIA NA FADIGA DO BÍCEPS BRAQUIAL DE ATLETAS DE VOLEIBOL

    Directory of Open Access Journals (Sweden)

    Juliana Lôbo Froio

    Full Text Available RESUMO Introdução: A laserterapia de baixa potência tem entre seus propósitos auxiliar a recuperação de tecidos biológicos, atenuando os efeitos da fadiga muscular e contribuindo com a melhora do desempenho em atletas. Aspectos metodológicos ainda limitam as conclusões do efeito agudo da laserterapia sobre o desempenho muscular. Objetivo: Verificar o efeito agudo do laser terapêutico de baixa potência na fadiga induzida do bíceps braquial de atletas de voleibol. Métodos: Este foi um estudo randomizado e duplo-cego, aprovado pelo Comitê de Ética da UNESP de Marília. Participaram do estudo 19 atletas de voleibol de ambos os sexos. Realizou-se coleta de dados eletromiográficos do músculo bíceps braquial no exercício isométrico de flexão de cotovelo antes e após a aplicação do laser terapêutico. Um haltere com 75% do pico de força, obtido por uma célula de carga, foi utilizado para o protocolo de fadiga. Em seguida, os voluntários foram submetidos à aplicação do laser (ativo ou placebo em seis pontos do músculo bíceps braquial. Os dados eletromiográficos foram analisados no domínio da frequência, utilizando-se o software Myosystem®. Verificou-se a distribuição de normalidade dos dados pelo teste de Shapiro-Wilk, e utilizou-se Anova (split plot de medidas repetidas a fim de testar a interação entre tempo e grupo. Resultados: Para nenhuma das variáveis analisadas foi observada interação significativa entre grupo e tempo, indicando que o grupo irradiado não apresentou vantagens com relação ao grupo placebo. Conclusão: Após o protocolo de fadiga proposto, uma única aplicação de laser de baixa potência não foi suficiente para produzir efeitos positivos no desempenho de força e no sinal eletromiográfico do músculo bíceps braquial de atletas de voleibol.

  7. Prevalência de fatores de risco em pacientes com infarto agudo do miocárdio

    Directory of Open Access Journals (Sweden)

    Simone Mathioni Mertins

    2016-01-01

    Full Text Available Objetivo: Identificar a prevalência de fatores de risco em pacientes com infarto agudo do miocárdio, internados em uma Unidade de Terapia Intensiva Coronariana de um hospital da região noroeste do estado do Rio Grande do Sul ̸ Brasil. Metodologia: Estudo quantitativo, descritivo e transversal, realizado no período compreendido entre 25 de abril a 25 de junho de 2012, com 48 pacientes. As variáveis de interesse para este estudo foram as condições sociodemográficas, dados antropométricos, hábitos alimentares e fatores de risco cardiovascular. Resultados: A idade média foi de 59,9 ± 11,55 anos, com predominância do sexo masculino (81,3%, de cor branca (83,3%, casados (70,8%, ensino fundamental incompleto (72,9%, aposentados (37,5%, renda menor que três salários mínimos (58,3% e procedentes da região urbana (72,9%. A prevalência dos fatores de risco se distribuiu da seguinte forma: sedentarismo (91,7%, hipertensão arterial sistêmica (63,8%, estresse (50%, circunferência abdominal alterada (50%, história familiar (43,7%, tabagismo (41,7%, sobrepeso (35,5%, obesidade (33,4%, dislipidemia (23%, diabetes mellitus (20,8% e consumo de álcool (12,5%. Conclusão: Os dados apresentados mostram a elevada prevalência de fatores de risco em pacientes que tiveram infarto agudo do miocárdio e nos direcionam a entender o papel da educação em saúde como estratégia para reduzir as causas de morbimortalidade, além de propor ações de cuidado e autocuidado e mudanças nos hábitos de vida.  Descritores: Fatores de Risco; Infarto do Miocárdio; Educação em Saúde (Fontes: DeCS e BIREME.

  8. Troponina T vs Troponina I como Valor Predictivo para Síndrome Coronario Agudo en menores de 80 Años

    Directory of Open Access Journals (Sweden)

    PE Pla Cala

    2015-07-01

    Full Text Available Resumen – Actualmente en la injuria miocárdica, ha tenido gran relevancia clínica la utilidad de las troponinas como método diagnóstico, repercutiendo en el manejo del síndrome coronario agudo. Objetivo: Analizar la importancia de los biomarcadores troponina T e I y otros elementos adyuvantes que cumplen un papel trascendental como es el electrocardiograma y los diferentes métodos invasivos, el cual brinda una orientación para la concepción de un diagnóstico oportuno que permita tomar las acciones pertinentes en un paciente con síndrome coronario agudo. Materiales y Métodos: Estudio descriptivo comparativo en 35 pacientes, adultos mayores de 21 años y menores 80 años, que se encontraban hospitalizados en la Empresa Social del Estado Centro de Atención y Rehabilitación Integral - E.S.E CARI de Alta complejidad, en el periodo comprendido entre el año 2012 a 2014. Resultados: Los pacientes presentaron síndrome coronario agudo (infarto agudo de miocardio con o sin elevación del ST, con factores de riesgo cardiovascular tales como: sedentarismo, tabaquismo, hipertensión arterial, diabetes, valvulopatías, dislipidemia y antecedentes de cardiopatía isquémica. El punto a analizar fue la elevación de los biomarcadores troponina T y troponina I en un periodo menor y mayor a 3 horas, desde el inicio de los síntomas (dolor torácico, criodiaforesis, disnea hasta el ingreso a la institución hospitalaria. Se compararon los resultados obtenidos de cada uno de estos biomarcadores en el diagnóstico precoz y oportuno del síndrome coronario agudo. De las muestra analizada (n=35 pacientes se obtuvo que la troponina T< 3 horas se elevó un 76.4% en rangos de edad entre los 60-80 años en contraste con troponina I < 3 horas en ese mismo grupo etario que fue de 70.5%. Conclusiones: se evidenció que ambos biomarcadores son equiparables con una ligera ventaja de la troponina T con respecto a la I.

  9. Bloqueio do nervo frênico após realização de bloqueio do plexo braquial pela via interescalênica: relato de caso A bloqueo del nervio frénico después de la realización de bloqueo del plexo braquial por la vía interescalénica: relato de caso Phrenic nerve block after interscalene brachial plexus block: case report

    Directory of Open Access Journals (Sweden)

    Luis Henrique Cangiani

    2008-04-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Bloqueio do nervo frênico é um evento adverso do bloqueio do plexo braquial; entretanto, na sua maioria, sem repercussões clínicas importantes. O objetivo deste relato foi apresentar um caso em que ocorreu bloqueio do nervo frênico, com comprometimento ventilatório, em paciente com insuficiência renal crônica submetido a instalação de fístula arteriovenosa extensa, sob bloqueio do plexo braquial pela via perivascular interescalênica. RELATO DO CASO: Paciente do sexo masculino, 50 anos, tabagista, portador de insuficiência renal crônica em regime de hemodiálise, hipertensão arterial, hepatite C, diabetes mellitus, doença pulmonar obstrutiva crônica, a ser submetido à instalação de fístula arteriovenosa extensa no membro superior direito sob bloqueio de plexo braquial pela via interescalênica. O plexo braquial foi localizado com utilização do estimulador de nervo periférico. Foram injetados 35 mL de uma solução de anestésico local, constituída de uma mistura de lidocaína a 2% com epinefrina a 1:200.000 e ropivacaína a 0,75% em partes iguais. Ao final da injeção o paciente apresentava-se lúcido, porém com dispnéia e predomínio de incursão respiratória intercostal ipsilateral ao bloqueio. Não havia murmúrio vesicular na base do hemitórax direito. A SpO2 manteve-se em 95%, com cateter nasal de oxigênio. Não foi necessária instalação de métodos de auxílio ventilatório invasivo. Radiografia do tórax revelou que o hemidiafragma direito ocupava o 5° espaço intercostal. O quadro clínico foi revertido em três horas. CONCLUSÕES: O caso mostrou que houve paralisia total do nervo frênico com sintomas respiratórios. Apesar de não ter sido necessária terapêutica invasiva para o tratamento, fica o alerta para a restrição da indicação da técnica nesses casos.JUSTIFICATIVA Y OBJETIVOS: El bloqueo del nervio frénico es un evento adverso del bloqueo del plexo braquial, sin

  10. Angular distributions in quasi-fission reactions

    International Nuclear Information System (INIS)

    Luetzenkirchen, K.; Kratz, J.V.; Lucas, R.; Poitou, J.; Gregoire, C.; Wirth, G.; Bruechle, W.; Suemmerer, K.

    1985-10-01

    Angular distributions for fission-like fragments were measured in the systems 50 Ti, 56 Fe + 208 Pb by applying an off-line KX-ray activation technique. The distributions d 2 sigma/dTHETAdZ exhibit forward-backward asymmetries that are strongly Z-dependent. They result from a process (quasi-fission) which yields nearly symmetric masses in times comparable to the rotational period of the composite system. A method for obtaining the variance of the tilting angular momentum, K 0 2 , from these skewed, differential angular distributions is described. The results indicate that the tilting mode is not fully excited in quasi-fission reactions. The results are compared to the sum of the variances of all statistical spin components, measured via γ-multiplicities. Integration of the angular distributions d 2 sigma/dTHETAdZ over all values of Z yields integral angular distributions dsigma/dTHETA and dsigma/dΩ symmetric around 90 0 . The associated unusually large anisotropies do not at all provide an adequate basis for tests or modifications of the transition state theory. A deconvolution of d 2 sigma/dTHETAdZ is performed with gaussian distributions depending on rotational angles ΔTHETA extending over a range of up to 540 0 . From the mean values a time scale for the evolution of K 0 is calculated. (orig.)

  11. Angular distribution of oriented nucleus fission neutrons

    International Nuclear Information System (INIS)

    Barabanov, A.L.; Grechukhin, D.P.

    1982-01-01

    Calculations of anisotropy of angular distribution of oriented 235 U nuclei thermal fission neutrons have been carried out. the neutrons were assumed to evaporate isotropically by completely accelerated fragements in the fragment system with only its small part, i. e. fission-producing neutrons, emitted at the moment of neck break. It has been found out that at low energies of neutrons Esub(n)=1-2 MeV the sensitivity of the angular distribution anisotropy to variations of spectrum of neutron evaporation from fragments and the magnitude of a share of fission-producing neutrons reaches approximately 100%, which at high energies, Esub(n) > 5 MeV it does not exceed approximately 20%. Therefore the angular distribution of fast neutrons to a greater degree of confidence may be used for restoring the angular distribution anisotropy of fragments while the angular distribution of low energy neutrons may be used for deriving information on the fission process, but only in case 6f the experiment accuracy is better than approximately 3%

  12. Transverse angular momentum in topological photonic crystals

    Science.gov (United States)

    Deng, Wei-Min; Chen, Xiao-Dong; Zhao, Fu-Li; Dong, Jian-Wen

    2018-01-01

    Engineering local angular momentum of structured light fields in real space enables applications in many fields, in particular, the realization of unidirectional robust transport in topological photonic crystals with a non-trivial Berry vortex in momentum space. Here, we show transverse angular momentum modes in silicon topological photonic crystals when considering transverse electric polarization. Excited by a chiral external source with either transverse spin angular momentum or transverse phase vortex, robust light flow propagating along opposite directions is observed in several kinds of sharp-turn interfaces between two topologically-distinct silicon photonic crystals. A transverse orbital angular momentum mode with alternating phase vortex exists at the boundary of two such photonic crystals. In addition, unidirectional transport is robust to the working frequency even when the ring size or location of the pseudo-spin source varies in a certain range, leading to the superiority of the broadband photonic device. These findings enable one to make use of transverse angular momentum, a kind of degree of freedom, to achieve unidirectional robust transport in the telecom region and other potential applications in integrated photonic circuits, such as on-chip robust delay lines.

  13. Angular cheilitis: A clinical and microbial study

    Directory of Open Access Journals (Sweden)

    Nirima Oza

    2017-01-01

    Full Text Available Aims: The aim of the present study was to examine clinical types and microbiological flora isolated from angular chelitis. Materials and Methods: An eroded and/or erythematous, with or without fissure formation, nonvesicular lesion radiating from the angle of the mouth was considered to be angular chelitis. A sample of the present study comprised of 40 patients having unilateral or bilateral angular chelitis and 20 healthy individuals without any lip lesions. Clinical examination was done. In both test and control groups, the sample for microbial analysis was obtained from angle of the mouth. Results: Clinically, four types of angular cheilitis lesions were found, Type I, II, III, and IV. The most common type of lesion found was Type I lesion. Microorganisms isolated from the lesion were Staphylococcus aureus, Candida or Streptococci in 33 (82.5% cases either in pure culture or mixed culture. Among these 33 patients, S. aureus was found in 25 (75.5% cases, Candida in 16 (48.4% cases, and Streptococci in 5 (13.5% cases, respectively. Out of 16 cases positive for Candida, in 13 cases further isolation of Candida was possible. Candida albicans was found in 6 cases and Candida stellastodia in 7 cases. In majority of the dentulous and edentulous patients, S. aureus showed profuse growth. Conclusions: There are microorganisms associated with angular cheilitis.

  14. Terapia com células-tronco na síndrome do desconforto respiratório agudo Stem cell therapy in acute respiratory distress syndrome

    Directory of Open Access Journals (Sweden)

    Tatiana Maron-Gutierrez

    2009-03-01

    Full Text Available A síndrome do desconforto respiratório agudo é caracterizada por uma reação inflamatória difusa do parênquima pulmonar, podendo ser induzida por um insulto direto ao epitélio alveolar (síndrome do desconforto respiratório agudo pulmonar ou indireto através do endotélio vascular (síndrome do desconforto respiratório agudo extrapulmonar. Acredita-se que uma terapia eficaz para o tratamento da síndrome do desconforto respiratório agudo deva atenuar a resposta inflamatória e promover adequado reparo da lesão pulmonar. O presente artigo apresenta uma breve revisão acerca do potencial terapêutico das células-tronco na síndrome do desconforto respiratório agudo. Essa revisão bibliográfica baseou-se em uma pesquisa sistemática de artigos experimentais e clínicos sobre terapia celular na síndrome do desconforto respiratório agudo incluídos nas bases de dados MedLine e SciELO nos últimos 10 anos. O transplante de células-tronco promove melhora da lesão inflamatória pulmonar e do conseqüente processo fibrótico, induzindo adequado reparo tecidual. Dentre os mecanismos envolvidos, podemos citar: diferenciação em células do epitélio alveolar e redução na liberação de mediadores inflamatórios e sistêmicos e fatores de crescimento. A terapia com células-tronco derivadas da medula óssea pode vir a ser uma opção eficaz e segura no tratamento da síndrome do desconforto respiratório agudo por acelerar o processo de reparo e atenuar a resposta inflamatória. Entretanto, os mecanismos relacionados à atividade antiinflamatória e antifibrogênica de tais células necessitam ser mais bem elucidados, limitando, assim, o seu uso clínico imediato.Acute respiratory distress syndrome is characterized by an acute pulmonary inflammatory process induced by the presence of a direct (pulmonary insult that affects lung parenchyma, or an indirect (extrapulmonary insult that results from an acute systemic inflammatory response

  15. Data-oriented development with AngularJS

    CERN Document Server

    Waikar, Manoj

    2015-01-01

    This book helps beginner-level AngularJS developers organize AngularJS applications by discussing important AngularJS concepts and best practices. If you are an experienced AngularJS developer but haven't written directives or haven't created custom HTML controls before, then this book is ideal for you.

  16. Angular correlations and high energy evolution

    International Nuclear Information System (INIS)

    Kovner, Alex; Lublinsky, Michael

    2011-01-01

    We address the question of to what extent JIMWLK evolution is capable of taking into account angular correlations in a high energy hadronic wave function. Our conclusion is that angular (and indeed other) correlations in the wave function cannot be reliably calculated without taking into account Pomeron loops in the evolution. As an example we study numerically the energy evolution of angular correlations between dipole scattering amplitudes in the framework of the large N c approximation to JIMWLK evolution (the 'projectile dipole model'). Target correlations are introduced via averaging over an (isotropic) ensemble of anisotropic initial conditions. We find that correlations disappear very quickly with rapidity even inside the saturation radius. This is in accordance with our physical picture of JIMWLK evolution. The actual correlations inside the saturation radius in the target QCD wave function, on the other hand, should remain sizable at any rapidity.

  17. Angular distributions in pre-equilibrium reactions

    International Nuclear Information System (INIS)

    Chatterjee, A.; Gupta, S.K.; Bhabha Atomic Research Centre, Bombay

    1982-10-01

    A new model is proposed for calculating angular distributions in preequilibrium reactions. In this model, as in the model of Feshbach et al. the system consisting of target plus projectile initially branches into two sets of states with either no particle in the continuum (multistep compound states) or with at least one particle in the continuum (multistep direct states). The two chains of states are treated independently by solving two sets of master equations. The multistep compound emission is assumed to be isotropic while the angular distribution of the multistep direct emission is described using the fast particle model of Mantzouranis et al. The angular distributions for 14.6 MeV neutrons calculated using this model are found to be in better agreement with the data than the fast particle model. (author)

  18. Angular momentum alignment in molecular beam scattering

    International Nuclear Information System (INIS)

    Treffers, M.A.

    1985-01-01

    It is shown how the angular momentum alignment in a molecular beam can be determined using laser-induced fluorescence in combination with precession of the angular momenta in a magnetic field. After a general analysis of the method, some results are presented to illustrate the possibilities of the method. Experimental data are presented on the alignment production for Na 2 molecules that made a collision induced angular momentum transition. Magnitude as well as direction of the alignment have been determined for scattering with several scattering partners and for a large number of scattering angles and transitions. The last chapter deals with the total alignment production in a final J-state, i.e. without state selection of the initial rotational state. (orig.)

  19. Ghost Imaging Using Orbital Angular Momentum

    Institute of Scientific and Technical Information of China (English)

    赵生妹; 丁建; 董小亮; 郑宝玉

    2011-01-01

    We present a novel encoding scheme in a ghost-imaging system using orbital angular momentum. In the signal arm, object spatial information is encoded as a phase matrix. For an N-grey-scale object, different phase matrices, varying from 0 to K with increment n/N, are used for different greyscales, and then they are modulated to a signal beam by a spatial light modulator. According to the conservation of the orbital angular momentum in the ghost imaging system, these changes will give different coincidence rates in measurement, and hence the object information can be extracted in the idler arm. By simulations and experiments, the results show that our scheme can improve the resolution of the image effectively. Compared with another encoding method using orbital angular momentum, our scheme has a better performance for both characters and the image object.%We present a novel encoding scheme in a ghost-imaging system using orbital angular momentum.In the signal arm,object spatial information is encoded as a phase matrix.For an N-grey-scale object,different phase matrices,varying from 0 to π with increment π/N,are used for different greyscales,and then they are modulated to a signal beam by a spatial light modulator.According to the conservation of the orbital angular momentum in the ghost imaging system,these changes will give different coincidence rates in measurement,and hence the object information can be extracted in the idler arm.By simulations and experiments,the results show that our scheme can improve the resolution of the image effectively.Compared with another encoding method using orbital angular momentum,our scheme has a better performance for both characters and the image object.

  20. Vivendo o acidente vascular encefálico agudo: significados da doença para pessoas hospitalizadas

    Directory of Open Access Journals (Sweden)

    Samia Jardelle Costa de Freitas Maniva

    2013-04-01

    Full Text Available Objetivou-se compreender o significado da experiência vivenciada pela pessoa adoecida por acidente vascular encefálico agudo. Trata-se de estudo qualitativo, fundamentado nos pressupostos teóricos do interacionismo simbólico, realizado em uma unidade especializada no tratamento de acidente vascular encefálico de um hospital terciário, situado na cidade de Fortaleza, CE. Participaram do estudo 10 pacientes. A coleta de dados ocorreu por meio de entrevista aberta e os dados foram organizados e analisados segundo a técnica de enunciação. Cumpriram-se todos os aspectos éticos. O significado da experiência de adoecimento foi construído com base na percepção dos sentimentos surgidos durante a hospitalização, caracterizados por medo da morte e das sequelas da doença; tristeza pelo distanciamento do lar; alívio, ao evidenciar-se melhora do quadro clínico, e desejo de mudança dos hábitos de vida. Apreendeu-se que a experiência de adoecimento por acidente vascular encefálico é complexa, e nela os significados são elaborados com base em sentimentos, ações e comportamentos dos sujeitos.

  1. Infarto agudo de miocardio. Guía de práctica clínica

    Directory of Open Access Journals (Sweden)

    Yanier Coll Muñoz

    2011-08-01

    Full Text Available

    La elaboración de esta Guía de Práctica Clínica se justifica, en primer lugar, por la elevada frecuencia de presentación y mortalidad del infarto agudo del miocardio en la población general. Las enfermedades cardiovasculares constituyen en la actualidad la principal causa de muerte en los países industrializados, y se espera que también lo sean en los países en vías de desarrollo en el año 2020.  La presente guía se refiere a los pacientes que presentan síntomas isquémicos o sus equivalentes, y una elevación persistente del segmento ST en el electrocardiograma, o cambios del electrocardiograma de infradesnivel del ST o de la onda T, compatibles con el diagnóstico de IAM sin elevación del ST. Esta Guía no aborda los elementos relacionados directamente con los procedimientos de intervencionismo coronario percutáneo ni la revascularización miocárdica quirúrgica.

  2. Efeito agudo do método de facilitação neuromuscular proprioceptiva na flexibilidade de bailarinas

    Directory of Open Access Journals (Sweden)

    Giane Andreia Souza Siqueira

    2013-11-01

    Full Text Available Objetivo: Verificar a resposta aguda do método de Facilitação Neuromuscular Proprioceptiva (FNP na flexibilidade e a influência das variáveis idade, peso, estatura em praticantes de Ballet Clássico. Método: A amostra foi composta por 11 bailarinas, com média de idade de 10,91 ± 0,79 anos praticantes regularmente de Ballet clássico duas vezes por semana com no mínimo de 5 anos de experiência. Foi utilizado o método de FNP nas bailarinas. Para avaliação da flexibilidade foi utilizado o Banco de Wells. Para analise estatística utilizou o teste de “t” de Student para amostras dependentes e análise de regressão Stepwise Forward com p≤0,05. Resultado:A diferença média de amplitude de movimento foi 4,81 ± 1,99 cm. Já a variável estatura demonstrou-se influenciar significativamente na flexibilidade. O método FNP demonstrou efeito agudo significativo na flexão de quadril em bailarinas.

  3. Vivendo o acidente vascular encefálico agudo: significados da doença para pessoas hospitalizadas

    Directory of Open Access Journals (Sweden)

    Samia Jardelle Costa de Freitas Maniva

    Full Text Available Objetivou-se compreender o significado da experiência vivenciada pela pessoa adoecida por acidente vascular encefálico agudo. Trata-se de estudo qualitativo, fundamentado nos pressupostos teóricos do interacionismo simbólico, realizado em uma unidade especializada no tratamento de acidente vascular encefálico de um hospital terciário, situado na cidade de Fortaleza, CE. Participaram do estudo 10 pacientes. A coleta de dados ocorreu por meio de entrevista aberta e os dados foram organizados e analisados segundo a técnica de enunciação. Cumpriram-se todos os aspectos éticos. O significado da experiência de adoecimento foi construído com base na percepção dos sentimentos surgidos durante a hospitalização, caracterizados por medo da morte e das sequelas da doença; tristeza pelo distanciamento do lar; alívio, ao evidenciar-se melhora do quadro clínico, e desejo de mudança dos hábitos de vida. Apreendeu-se que a experiência de adoecimento por acidente vascular encefálico é complexa, e nela os significados são elaborados com base em sentimentos, ações e comportamentos dos sujeitos.

  4. Total angular momentum from Dirac eigenspinors

    International Nuclear Information System (INIS)

    Szabados, Laszlo B

    2008-01-01

    The eigenvalue problem for Dirac operators, constructed from two connections on the spinor bundle over closed spacelike 2-surfaces, is investigated. A class of divergence-free vector fields, built from the eigenspinors, are found, which, for the lowest eigenvalue, reproduce the rotation Killing vectors of metric spheres, and provide rotation BMS vector fields at future null infinity. This makes it possible to introduce a well-defined, gauge invariant spatial angular momentum at null infinity, which reduces to the standard expression in stationary spacetimes. The general formula for the angular momentum flux carried away by the gravitational radiation is also derived

  5. Studying AGN Jets At Extreme Angular Resolution

    Science.gov (United States)

    Bruni, Gabriele

    2016-10-01

    RadioAstron is a 10m antenna orbiting on the Russian Speckt-R spacecraft, launched in 2011. Performing radio interferometry with a global array of ground telescopes, it is providing record angular resolution. The Key Science Project on AGN polarization is exploiting it to study in great detail the configuration of magnetic fields in AGN jets, and understand their formation and collimation. To date, the project has already achieved the highest angular resolution image ever obtained in Astronomy, and detected brightness temperatures exceeding the ones predicted by theory of AGN.

  6. Factorial correlators: angular scaling within QCD jets

    International Nuclear Information System (INIS)

    Peschanski, R.

    2001-01-01

    Factorial correlators measure the amount of dynamical correlation in the multiplicity between two separated phase-space windows. We present the analytical derivation of factorial correlators for a QCD jet described at the double logarithmic (DL) accuracy. We obtain a new angular scaling property for properly normalized correlators between two solid-angle cells or two rings around the jet axis. Normalized QCD factorial correlators scale with the angular distance and are independent of the window size. Scaling violations are expected beyond the DL approximation, in particular from the subject structure. Experimental tests are feasible, and thus would be welcome. (orig.)

  7. Canonical three-body angular basis

    International Nuclear Information System (INIS)

    Matveenko, A.V.

    2001-01-01

    Three-body problems are basic for the quantum mechanics of molecular, atomic, or nuclear systems. We demonstrate that their variational solution for rotational states can be greatly simplified. A special choice of coordinates (hyperspherical) and of the kinematics (body-fixed coordinate frame) allows one to choose basis functions in a form that makes the angular coupling trivial. (author)

  8. Probabilistic calculation for angular dependence collision

    International Nuclear Information System (INIS)

    Villarino, E.A.

    1990-01-01

    This collision probabilistic method is broadly used in cylindrical geometry (in one- or two-dimensions). It constitutes a powerful tool for the heterogeneous Response Method where, the coupling current is of the cosine type, that is, without angular dependence at azimuthal angle θ and proportional to μ (cosine of the θ polar angle). (Author) [es

  9. Wigner Functions and Quark Orbital Angular Momentum

    Directory of Open Access Journals (Sweden)

    Mukherjee Asmita

    2015-01-01

    Full Text Available Wigner distributions contain combined position and momentum space information of the quark distributions and are related to both generalized parton distributions (GPDs and transverse momentum dependent parton distributions (TMDs. We report on a recent model calculation of the Wigner distributions for the quark and their relation to the orbital angular momentum.

  10. Wigner Functions and Quark Orbital Angular Momentum

    OpenAIRE

    Mukherjee, Asmita; Nair, Sreeraj; Ojha, Vikash Kumar

    2014-01-01

    Wigner distributions contain combined position and momentum space information of the quark distributions and are related to both generalized parton distributions (GPDs) and transverse momentum dependent parton distributions (TMDs). We report on a recent model calculation of the Wigner distributions for the quark and their relation to the orbital angular momentum.

  11. A Novel Permanent Magnetic Angular Acceleration Sensor

    Directory of Open Access Journals (Sweden)

    Hao Zhao

    2015-07-01

    Full Text Available Angular acceleration is an important parameter for status monitoring and fault diagnosis of rotary machinery. Therefore, we developed a novel permanent magnetic angular acceleration sensor, which is without rotation angle limitations and could directly measure the instantaneous angular acceleration of the rotating system. The sensor rotor only needs to be coaxially connected with the rotating system, which enables convenient sensor installation. For the cup structure of the sensor rotor, it has a relatively small rotational inertia. Due to the unique mechanical structure of the sensor, the output signal of the sensor can be directed without a slip ring, which avoids signal weakening effect. In this paper, the operating principle of the sensor is described, and simulated using finite element method. The sensitivity of the sensor is calibrated by torsional pendulum and angle sensor, yielding an experimental result of about 0.88 mV/(rad·s−2. Finally, the angular acceleration of the actual rotating system has been tested, using both a single-phase asynchronous motor and a step motor. Experimental result confirms the operating principle of the sensor and indicates that the sensor has good practicability.

  12. Angular-momentum-bearing modes in fission

    International Nuclear Information System (INIS)

    Moretto, L.G.; Peaslee, G.F.; Wozniak, G.J.

    1989-03-01

    The angular-momentum-bearing degrees of freedom involved in the fission process are identified and their influence on experimental observables is discussed. The excitation of these modes is treated in the ''thermal'' limit, and the resulting distributions of observables are calculated. Experiments demonstrating the role of these modes are presented and discussed. 61 refs., 12 figs

  13. Angular and linear momentum of excited ferromagnets

    NARCIS (Netherlands)

    Yan, P.; Kamra, A.; Cao, Y.; Bauer, G.E.W.

    2013-01-01

    The angular momentum vector of a Heisenberg ferromagnet with isotropic exchange interaction is conserved, while under uniaxial crystalline anisotropy the projection of the total spin along the easy axis is a constant of motion. Using Noether's theorem, we prove that these conservation laws persist

  14. Angular distribution in ternary cold fission

    International Nuclear Information System (INIS)

    Delion, D.S.; J.W. Goethe Univ., Frankfurt; Sandulescu, A.; J.W. Goethe Univ., Frankfurt; Greiner, W.

    2003-01-01

    We describe the spontaneous ternary cold fission of 252 Cf, accompanied by 4 He, 10 Be and 14 C. The light cluster decays from the first resonant eigenstate in the Coulomb potential plus a harmonic oscillator potential. We have shown that the angular distribution of the emitted light particle is strongly connected with its deformation and the equatorial distance. (author)

  15. Heteromodal conceptual processing in the angular gyrus.

    Science.gov (United States)

    Bonner, Michael F; Peelle, Jonathan E; Cook, Philip A; Grossman, Murray

    2013-05-01

    Concepts bind together the features commonly associated with objects and events to form networks in long-term semantic memory. These conceptual networks are the basis of human knowledge and underlie perception, imagination, and the ability to communicate about experiences and the contents of the environment. Although it is often assumed that this distributed semantic information is integrated in higher-level heteromodal association cortices, open questions remain about the role and anatomic basis of heteromodal representations in semantic memory. Here we used combined neuroimaging evidence from functional magnetic resonance imaging (fMRI) and diffusion tensor imaging (DTI) to characterize the cortical networks underlying concept representation. Using a lexical decision task, we examined the processing of concepts in four semantic categories that varied on their sensory-motor feature associations (sight, sound, manipulation, and abstract). We found that the angular gyrus was activated across all categories regardless of their modality-specific feature associations, consistent with a heteromodal account for the angular gyrus. Exploratory analyses suggested that categories with weighted sensory-motor features additionally recruited modality-specific association cortices. Furthermore, DTI tractography identified white matter tracts connecting these regions of modality-specific functional activation with the angular gyrus. These findings are consistent with a distributed semantic network that includes a heteromodal, integrative component in the angular gyrus in combination with sensory-motor feature representations in modality-specific association cortices. Copyright © 2013 Elsevier Inc. All rights reserved.

  16. ANGULAR MOMENTUM ACQUISITION IN GALAXY HALOS

    International Nuclear Information System (INIS)

    Stewart, Kyle R.; Brooks, Alyson M.; Bullock, James S.; Maller, Ariyeh H.; Diemand, Jürg; Wadsley, James; Moustakas, Leonidas A.

    2013-01-01

    We use high-resolution cosmological hydrodynamic simulations to study the angular momentum acquisition of gaseous halos around Milky-Way-sized galaxies. We find that cold mode accreted gas enters a galaxy halo with ∼70% more specific angular momentum than dark matter averaged over cosmic time (though with a very large dispersion). In fact, we find that all matter has a higher spin parameter when measured at accretion than when averaged over the entire halo lifetime, and is well characterized by λ ∼ 0.1, at accretion. Combined with the fact that cold flow gas spends a relatively short time (1-2 dynamical times) in the halo before sinking to the center, this naturally explains why cold flow halo gas has a specific angular momentum much higher than that of the halo and often forms ''cold flow disks.'' We demonstrate that the higher angular momentum of cold flow gas is related to the fact that it tends to be accreted along filaments.

  17. W UMa stars and angular momentum loss

    International Nuclear Information System (INIS)

    Vilhu, O.; Rahunen, T.

    1980-01-01

    The structure and evolution of W UMa stars is still unsolved although considerable progress has been achieved in recent years. The authors aim is to find out whether it is possible to obtain more extreme mass ratios, what is the angular momentum needed and what is the time scale. (Auth.)

  18. On the angular momentum in star formation

    International Nuclear Information System (INIS)

    Horedt, G.P.

    1978-01-01

    The author discusses the rotation of interstellar clouds which are in a stage immediately before star formation. Cloud collisions seem to be the principal cause of the observed rotation of interstellar clouds. The rotational motion of the clouds is strongly influenced by turbulence. Theories dealing with the resolution of the angular momentum problem in star formation are classified into five major groups. The old idea that the angular momentum of an interstellar cloud passes during star formation into the angular momentum of double star systems and/or circumstellar clouds, is developed. It is suggested that a rotating gas cloud contracts into a ring-like structure which fragments into self-gravitating subcondensations. By collisions and gas accretion these subcondensations accrete into binary systems surrounded by circumstellar clouds. Using some rough approximations the authors find analytical expressions for the semi-major axis of the binary system and for the density of the circumstellar clouds as a function of the initial density and of the initial angular velocity of an interstellar cloud. The obtained values are well within the observational limits. (Auth.)

  19. Variation in angular velocity and angular acceleration of a particle in rectilinear motion

    International Nuclear Information System (INIS)

    Mashood, K K; Singh, V A

    2012-01-01

    We discuss the angular velocity and angular acceleration associated with a particle in rectilinear motion with constant acceleration. The discussion was motivated by an observation that students and even teachers have difficulty in ascribing rotational motion concepts to a particle when the trajectory is a straight line. We present some details of our observations. A formal derivation of ω and α is presented which reveals ‘surprising’ and non-intuitive aspects, namely non-monotonic behaviour with an associated extremum. The special case of constant velocity is studied and we find that angular acceleration associated with it also has an extremum. We discuss a plausible source of difficulty. (paper)

  20. Glaucoma agudo bilateral em paciente jovem secundário ao uso de topiramato: relato de caso Bilateral acute angle closure glaucoma in a young patient receiving oral topiramate: case report

    Directory of Open Access Journals (Sweden)

    Fausto Stangler

    2007-02-01

    Full Text Available Topiramato é droga derivada das sulfas e utilizada sistemicamente como anticonvulsivante. Pode produzir efusão uveal e causar glaucoma agudo por fechamento angular pelo deslocamento da íris e do cristalino anteriormente, com miopização transitória. O processo cede com a suspensão da droga, se identificado precocemente. Os autores relatam, pela primeira vez na literatura científica nacional, um caso no qual a efusão uveal ocorreu após a administração de topiramato para tratamento de enxaqueca. Paciente branca de 40 anos foi examinada no setor de emergência do Hospital Banco de Olhos de Porto Alegre apresentando cefaléia intensa, dor ocular e diminuição da visão em ambos os olhos. Referia uso de topiramato desde dez dias antes do início dos sintomas. O exame biomicroscópico mostrava injeção conjuntival, quemose e câmara anterior rasa nos dois olhos. A pressão intra-ocular era de 40 mmHg no olho direito e 38 mmHg no olho esquerdo. Os achados fundoscópicos estavam normais nos dois olhos. A ultra-sonografia ocular mostrou efusão uveal e descolamento de coróide bilateral nos dois olhos. Foi realizado o diagnóstico de efusão uveal relacionada com o uso de topiramato. A medicação foi suspensa com melhora do quadro clínico e da acuidade visual três dias após a apresentação inicial. A efusão uveal induzida por drogas ocorre raramente. O topiramato pode causar edema do corpo ciliar e relaxamento da zônula, com conseqüente deslocamento anterior do diafragma irido-cristaliniano, causando miopização aguda e fechamento angular. Como o mecanismo de fechamento angular não envolve bloqueio pupilar, iridectomias periféricas e o uso de mióticos tópicos não são efetivos nesses casos. Houve regressão completa do quadro após a suspensão da medicação.This paper reports a clinical case of uveal effusion in both eyes causing bilateral acute angle closure glaucoma in a young patient after oral administration of topiramate

  1. Analgesia pós-operatória para procedimentos cirúrgicos ortopédicos de quadril e fêmur: comparação entre bloqueio do compartimento do psoas e bloqueio perivascular inguinal Analgesia postoperatoria para procedimientos quirúrgicos ortopédicos de cadera y fémur: comparación entre bloqueo del compartimiento del psoas y bloqueo perivascular inguinal Postoperative analgesia for orthopedic surgeries of the hip and femur: a comparison between psoas compartment and inguinal paravascular blocks

    Directory of Open Access Journals (Sweden)

    Luiz Eduardo Imbelloni

    2006-12-01

    dos cinco nervos do plexo lombar.JUSTIFICATIVA Y OBJETIVOS: Este estudio evaluó la eficacia de la inyección única de bupivacaína a 0,25% en el compartimiento del psoas o perivascular inguinal a través del estimulador de nervios periféricos para analgesia postoperatoria en pacientes sometidos a intervenciones quirúrgicas ortopédicas. MÉTODO: Cien pacientes recibieron bloqueo del plexo lumbar a través del compartimiento del psoas y fueron comparados con 100 pacientes que recibieron bloqueo del plexo lumbar vía perivascular inguinal, identificados por el estimulador de nervios periféricos con la inyección de 40 mL bupivacaína a 0,25% sin epinefrina. La analgesia en los nervios ilioinguinal, genitofemoral, cutáneo femoral lateral, femoral y obturatorio fue evaluada a las 4, 8, 12, 16, 20 y 24 horas después del final de la intervención quirúrgica. La intensidad del dolor también fue medida en el mismo período. La cantidad de opioides administrada en el postoperatorio fue anotada. En cinco pacientes de cada grupo, un estudio radiográfico con contraste no iónico se realizó para medir la dispersión de la solución anestésica. RESULTADOS: Los nervios ilioinguinal, genitofemoral, cutáneo femoral lateral, femoral y obturatorio fueron bloqueados en 92% de los pacientes en el compartimiento del psoas versus 62% en el bloqueo perivascular inguinal. El bloqueo del plexo lumbar redujo la necesidad de opioides y 42% de los pacientes sometidos al bloqueo del compartimiento del psoas y 36% de los pacientes en el bloqueo inguinal no necesitaron analgésico adicional en el postoperatorio. La duración de la analgesia fue de aproximadamente 21 horas con el bloqueo del compartimiento del psoas y 15 horas en el bloqueo perivascular inguinal. CONCLUSIONES: El bloqueo del compartimiento del psoas y perivascular inguinal es una excelente técnica para la analgesia postoperatoria en intervenciones quirúrgicas ortopédicas reduciendo la necesidad de opioides. Ese

  2. Bloqueio extraconal para facectomia com implante de lente intra-ocular: influência do fentanil associado ao anestésico local na qualidade do bloqueio e na analgesia pós-operatória Bloqueo extraconal para facectomia con implantación de lente intra-ocular: influencia del fentanil asociado al anestésico local en la calidad del bloqueo y en la analgesia pos-operatoria Extraconal block for cataract extraction surgery with implantation of intraocular lens: contribution of fentanyl associated to local anesthetics for quality of block and postoperative analgesia

    Directory of Open Access Journals (Sweden)

    Daniel Espada Lahoz

    2003-09-01

    melhorou a qualidade do bloqueio quanto à motilidade do músculo reto medial e diminuiu a necessidade de analgésicos no pós-operatório.JUSTIFICATIVA Y OBJETIVOS: La anestesia locorregional para cirugías oftalmológicas ofrece ventajas, como: mínimas alteraciones fisiológicas, anestesia completa, bloqueo de los reflejos oculares, pequeña incidencia de náuseas y vómitos, menor tiempo de recuperación y analgesia pos-operatoria. La preocupación constante con la calidad del bloqueo, así como la abordaje de la analgesia pos-operatoria debe quedar bajo la responsabilidad del anestesiologista. El objetivo de este estudio fue evaluar si el fentanil contribuye en la calidad del bloqueo extraconal y en la analgesia pos-operatoria de facectomias con implantación de lente intra-ocular. MÉTODO: Se estudió la asociación del fentanil y bupivacaína a 0,75% en la calidad del bloqueo ocular y en la analgesia pos-operatoria en 164 pacientes sometidos a facectomia con implantación de lente intra-ocular (técnica extracapsular, de ambos sexos con homogeneidad de parámetros antropométricos, ojo operado, clasificación del estado físico (ASA e índice de riesgo cardíaco de Goldman. Los pacientes fueron distribuidos en dos grupos (82 pacientes en cada grupo por sorteo de forma aleatoria, con y sin fentanil. Se evaluó la calidad del bloqueo por: aparecimiento de dolor en el per-operatorio, manutención de movimentación de los párpados o del globo ocular, persistencia del reflejo de Bell, número de bloqueos realizados para la obtención de condiciones quirúrgicas y evaluación del bloqueo por el cirujano. La analgesia pos-operatoria fue evaluada por la necesidad de complementación analgésica por el paciente. RESULTADOS: Fentanil asociado a la solución anestésica en el bloqueo extraconal aumentó significativamente el bloqueo del músculo recto medial (con fentanil - 17,1%, sin fentanil - 32,9% y diminuyó el consumo de analgésicos en el período pos-operatorio (uso

  3. Atención farmacéutica en personas que han sufrido episodios coronarios agudos (estudio TOMCOR

    Directory of Open Access Journals (Sweden)

    Álvarez de Toledo Flor

    2001-01-01

    Full Text Available Fundamento: Este estudio valora los efectos de un nuevo modelo de trabajo en las farmacias, denominado Atención Farmacéutica, frente al modelo tradicional. Se pretende conocer su factibilidad y las diferencias, potencialmente debidas a la Atención Farmacéutica, respecto de los resultados de salud de la farmacoterapia usada, en una muestra de pacientes que han sufrido episodios coronarios agudos. Métodos: Es un estudio prospectivo con un grupo de intervención (330 personas y un grupo control (405 personas, realizado en 83 farmacias de Asturias, Barcelona, Madrid y Vizcaya, en las que se hizo seguimiento durante un año del uso de medicamentos en 735 personas, de las cuales finalizaron el estudio 600. Resultados: Hubo diferencias favorables al grupo intervención, respecto de: a uso de servicios sanitarios indicativos de mayor morbilidad, tales como la frecuencia de consultas hospitalarias urgentes por paciente 1,27Interv. (IC95 %:1,10 a 1,44 y 1,63Contr.(IC95 %:1,36 a 1,90 o los días promedio de UCI por paciente hospitalizado: 2,46Interv.(IC95 %:1,56 a 3,36 y 5,87Contr.(IC95 %: 3,57 a 8,17, por causa cardiológica; b calidad de vida con diferencia de 4,7 (p < 0,05 en la dimensión de función física; c conocimiento de factores de riesgo de enfermedad coronaria, promedio de +10 % (p < 0,02 - 0,07, según dimensión; d identificación nominal de los medicamentos usados +10 % (p < 0,01; importancia subjetiva otorgada a los antiagregantes + 12 % (p < 0,009, los beta-bloqueantes, así como sus efectos +25 % (p < 0,02; y e satisfacción con la AF y percepción de la competencia profesional, promedio de + 12 % (p < 0,000 - 0,05, según dimensión. Conclusiones: Los valores menores de: demanda individual urgente coronaria, frecuencia de hospitalizaciones y número de días de Unidad de Cuidados Intensivos coronaria por hospitalización, sugerirían que los pacientes que tras un episodio coronario agudo reciben Atención Farmacéutica tienden a

  4. Atención farmacéutica en personas que han sufrido episodios coronarios agudos (estudio tomcor

    Directory of Open Access Journals (Sweden)

    Flor Álvarez de Toledo

    2001-01-01

    Full Text Available Fundamento: Este estudio valora los efectos de un nuevo modelo de trabajo en las farmacias, denominado Atención Farmacéutica, frente al modelo tradicional. Se pretende conocer su factibilidad y las diferencias, potencialmente debidas a la Atención Farmacéutica, respecto de los resultados de salud de la farmacoterapia usada, en una muestra de pacientes que han sufrido episodios coronarios agudos. Métodos: Es un estudio prospectivo con un grupo de intervención (330 personas y un grupo control (405 personas, realizado en 83 farmacias de Asturias, Barcelona, Madrid y Vizcaya, en las que se hizo seguimiento durante un año del uso de medicamentos en 735 personas, de las cuales finalizaron el estudio 600. Resultados: Hubo diferencias favorables al grupo intervención, respecto de: a uso de servicios sanitarios indicativos de mayor morbilidad, tales como la frecuencia de consultas hospitalarias urgentes por paciente 1,27Interv. (IC95 %:1,10 a 1,44 y 1,63Contr.(IC95 %:1,36 a 1,90 o los días promedio de UCI por paciente hospitalizado: 2,46Interv.(IC95 %:1,56 a 3,36 y 5,87Contr.(IC95 %: 3,57 a 8,17, por causa cardiológica; b calidad de vida con diferencia de 4,7 (p < 0,05 en la dimensión de función física; c conocimiento de factores de riesgo de enfermedad coronaria, promedio de +10 % (p < 0,02 - 0,07, según dimensión; d identificación nominal de los medicamentos usados +10 % (p < 0,01; importancia subjetiva otorgada a los antiagregantes + 12 % (p < 0,009, los beta-bloqueantes, así como sus efectos +25 % (p < 0,02; y e satisfacción con la AF y percepción de la competencia profesional, promedio de + 12 % (p < 0,000 – 0,05, según dimensión. Conclusiones: Los valores menores de: demanda individual urgente coronaria, frecuencia de hospitalizaciones y número de días de Unidad de Cuidados Intensivos coronaria por hospitalización, sugerirían que los pacientes que tras un episodio coronario agudo reciben Atención Farmacéutica tienden a

  5. Daño pulmonar agudo relacionado con la transfusión (Trali y Bartonelosis aguda

    Directory of Open Access Journals (Sweden)

    Douglas López de Guimaraes

    2006-07-01

    Full Text Available Se presenta el caso de un varón de 22 años procedente de la periferia de la ciudad de Huaraz, Perú, que acude al Hospital "Victor Ramos Guardia" de Huaraz con un tiempo de enfermedad de 14 días, febril, pálido e ictérico, en el frotis de sangre periférica se encuentran formas bacilares de Bartonella bacilliformis en 99% de la lámina; se inicia tratamiento antibiótico con ceftriaxona y ciprofloxacino. Al día siguiente se le indica transfusión de dos paquetes globulares (puesto que tenía 6,2 g/dL de Hb, dos horas después presenta dolor toráxico, tos seca exigente, vómitos, dificultad respiratoria y cianosis, en la auscultación se encuentran roncantes y crepitantes, la radiografía de tórax muestra infiltrado alveolar difuso a predominio derecho. Es trasladado a la UCI donde recibe oxígeno con máscara de reservorio, dopamina, corticoides y se inicia el monitoreo hemodinámico; responde en forma satisfactoria, sale de alta con frotis negativo a Bartonella bacilliformis. Es el primer caso de daño pulmonar agudo relacionado con la transfusión (TRALI asociado con Bartonelosis aguda con cuadro clínico - radiológico y evolución compatible, es importante distinguir entre la complicación pulmonar debido a la sepsis grave por Bartonelosis aguda, que puede producir un cuadro clínico similar y el TRALI.

  6. Terapia ocupacional en un hospital general de pacientes agudos = Occupational therapy in a general hospital for acute pacients

    Directory of Open Access Journals (Sweden)

    Ocello, M. G

    2006-09-01

    Full Text Available RESUMEN Desde su creación, el Hospital Provincial “Dr. José María Cullen” posee la característica de ser un hospital de emergencias, sostenido por la Sociedad de Beneficencia y la Hermanas de la Caridad.Su funcionamiento responde a un Modelo Clínico-Asistencial, lo cual influye en la inserción de Terapia Ocupacional debiendo adaptar sus funciones a las características de la Institución.Los marcos de referencia teóricos y programas que se implementandeber ser acordes con las necesidades surgidas de un Hospital General de Agudos y de emergencias.En el Sector de Terapia Ocupacional se desarrolla la actividad docente cumpliendo con los requisitos reglamentados por el Ministerio de Salud de la Provincia de Santa Fe.ABSTRACT Ever since its start the Provincial Hospital “Dr. José María Cullen” is characterised for being an emergency hospital under the guidance of the Benfit Society of Hermanas de la Caridad.Its function responds to a Clinical Assistential Model, which influences the insertion of Occupational Therapy, adapting its functiones to the characteristics of the Institution as and when called for.The theoretical points of reference and programmes that are used must be in accordance with tehe necessities that appear in an Acute and Emergency General Hospital.In the Occupational Therapy Sector the teaching activity is developed as required by rules and regulations of the Ministry of Health for the Province of Santa Fe.

  7. Fibrilação atrial, infarto agudo do miocárdio e oclusão arterial aguda em paciente jovem com hipertireoidismo

    Directory of Open Access Journals (Sweden)

    Fabrício Thebit Bortolon

    2009-09-01

    Full Text Available Relato de caso de paciente jovem com hipertireoidismo não diagnosticado, apresentando quadro de fibrilação atrial, infarto agudo do miocárdio e oclusão arterial aguda de perna direita. Submetido à trombólise, embolectomia e iniciado tratamento para hipertireoidismo com tapazol. A evolução foi satisfatória, com reversão da alteração eletrocardiográfica isquêmica, melhora dos sintomas de oclusão arterial, controle do ritmo cardíaco e da função tireoidiana.

  8. Sistema informático para la gestión de la información hospitalaria del infarto agudo de miocardio (RHIMA

    Directory of Open Access Journals (Sweden)

    Yanier Coll Muñoz

    2015-10-01

    Full Text Available Introducción: La difícil recopilación de información sobre la prevalencia y desarrollo del infarto agudo de miocardio imposibilita medir la calidad del tratamiento durante la evolución de la enfermedad en un determinado grupo de pacientes.Objetivo: Desarrollar un sistema informático que permita la gestión de la información hospitalaria del infarto agudo de miocardio en el Servicio de Cardiología.Método: Se identificaron las variables necesarias para la confección del registro, divididas por bloques relacionados con la atención prehospitalaria, el síndrome coronario agudo, la atención en Unidades de Cuidados Coronarios y el egreso. Se creó un sistema informático que utiliza NetBeans como IDE de programación, Apache como servidor web y la base de datos en MySQL; como lenguaje de programación se utilizó PHP con la infraestructura digital (framework Yii del lado del servidor y JavaScript con el framework ExtJs 4.1.1 del lado del cliente. Como modelador de base de datos se utilizó ER/Studio.Resultados: Se conformó el Registro Hospitalario de Infarto Agudo de Miocardio (RHIMA para su aplicación en el Hospital Gustavo Aldereguía Lima de Cienfuegos, Cuba; se lograron obtener datos estadísticos inmediatos que permitieron realizar un análisis de la atención a los pacientes con esta enfermedad.Conclusiones: Se desarrolló un sistema informático web capaz de gestionar la información del IAM. Su diseño, acorde al Sistema Nacional de Salud de Cuba, tiene en cuenta las características epidemiológicas y demográficas de la población cubana y brindan indicadores de calidad en la terapéutica para el registro de la información del IAM, ajustadas a las recomendaciones de las principales Guías de Práctica Clínica.

  9. O problema do trabalho infantil na agricultura familiar: o caso da produção de tabaco em Agudo-RS

    Directory of Open Access Journals (Sweden)

    Joel Orlando Bevilaqua Marin

    2012-12-01

    Full Text Available O objetivo do artigo é analisar a emergência do problema do trabalho infantil no cultivo de tabaco em Agudo, desencadeado pela promulgação do Decreto n. 6.481/2008, que trata das piores formas de trabalho infantil. Os procedimentos metodológicos utilizados foram a revisão bibliográfica, pesquisa documental e um estudo de caso, realizado no município de Agudo, Rio Grande do Sul. No estudo de caso, procurou-se obter dados quantitativos e qualitativos, por meio de questionários e entrevistas abertas, dirigidos para 27 agricultores familiares fumicultores, com filhos com menos de 18 anos de idade. Os resultados da pesquisa indicam a existência de um confronto entre diferentes concepções sobre o trabalho da criança no âmbito da agricultura familiar. Os dispositivos legais, os termos de compromissos e os contratos de integração na cadeia produtiva do fumo proíbem o trabalho de menores de 18 anos, fundamentando-se nos princípios internacionais da garantia do pleno desenvolvimento das crianças. Na perspectiva das famílias, o trabalho das crianças é entendido como "ajuda", forma de socialização e formação dos herdeiros. Portanto, os pais não concordam que se trata de uma forma perversa de exploração do trabalho dos próprios filhos.The aim of this paper is to analyze the emergence of the child labor problem in tobacco growing in Agudo (Rio Grande do Sul state, triggered by the promulgation of Act 6.481/2008, which addresses the worst child labor conditions. The methodological procedures used were the literature review, desk research and a case study, conducted in the municipality of Agudo. In the case study, we have tried to obtain quantitative and qualitative data through questionnaires and open interviews directed to 27 tobacco growers, and with teenagers and children under 18 years old. The survey results indicate the existence of a clash between different conceptions of child labor in small scale family farmers. The legal

  10. Impacto Pronóstico de los Síndromes Geriátricos en Pacientes Ancianos con Síndrome Coronario Agudo

    OpenAIRE

    Bonanad Lozano, Clara

    2015-01-01

    Los síndromes geriátricos pueden predecir eventos adversos en el contexto del síndrome coronario agudo más allá de la propia edad y de los clásicos factores de riesgo cardiovascular. El objetivo de la presente tesis doctoral fue cuantificar y evaluar un amplio espectro de síndromes geriátricos en pacientes supervivientes a la fase aguda de un síndrome coronario. Se incluyeron un total de 342 pacientes mayores de 65 años que ingresaron de forma consecutiva en el servicio de Cardiología de un ú...

  11. Hiperalimentação enteral em traumatismos crânio-encefálicos agudos reposição ou dietoterapia?

    Directory of Open Access Journals (Sweden)

    Arthur Schelp

    1992-06-01

    Full Text Available Os autores apresentam revisão geral sobre a fisiopatogenia do trauma, ressaltando os estados de hipereatabolismo e hipermetabolismo, suas consequências nutricionais, com as particularidades do trauma encefálico. São feitas, também, considerações sobre as vias, composição e volumes das dietas enterais a serem administradas a pacientes com trauma agudo encefálico, assim como são apontadas questões a serem melhor elucidadas.

  12. Fluidoterapia entérica versus fluidoterapia endovenosa em casos de síndrome de abdómen agudo em equinos

    OpenAIRE

    Mancha, Dora Alexandra Inácio

    2009-01-01

    Dissertação de Mestrado Integrado em Medicina Veterinária O Síndrome de Abdómen Agudo é uma patologia muito frequentemente encontrada na prática clínica de equinos. A hidratação dos cavalos com dor abdominal aguda é extremamente importante. Por este motivo, a abordagem terapêutica médica destes animais inclui quase invariavelmente a administração de fluidos. O médico veterinário pode recorrer à fluidoterapia entérica e à fluidoterapia endovenosa para o tratamento destes animais...

  13. Mortalidad por enfermedad de Chagas: A propósito de los brotes de Chagas agudo como enfermedad reemergente de transmisión alimentaria

    OpenAIRE

    Rísquez, Alejandro

    2009-01-01

    Tras la ocurrencia de los primeros brotes de Chagas agudos en la capital (diciembre 2007) y Estado Vargas (marzo 2009) por trasmisión oral, se procedió a una revisión de la mortalidad por la enfermedad registrada entre 1997 y 2006, cuyos datos se analizaron de acuerdo a la edad, sexo y forma de presentación. El número absoluto de muertes sigue siendo elevado con promedio de 796 muertes anuales, de predominio en el sexo masculino, la mayoría en después de los 60 años de edad. Llama la atención...

  14. Efectos agudos de la actividad física y los videojuegos activos sobre las funciones cognitivas en jóvenes y adultos mayores

    OpenAIRE

    López García, Jesús

    2017-01-01

    La presente tesis doctoral consiste en intentar aportar nuevas evidencias científicas que traten de ampliar y clarificar el conocimiento existente referente a los efectos agudos de la actividad física aeróbica y los videojuegos activos sobre las funciones cognitivas en dos muestras poblacionales diferentes: los jóvenes adultos y los adultos mayores. Como síntesis general, podríamos indicar que el fin de las series experimentales desarrolladas en esta tesis tratan de estudiar si la práctic...

  15. Comportamiento del infarto agudo del miocardio en personas con diabetes mellitus de la provincia Granma Situation of the acute myocardial infarction in persons with diabetes mellitus in Granma province

    OpenAIRE

    Eduardo René Valdés Ramos; Marjoris Rivera Chávez; Niurka Bencosme Rodríguez

    2012-01-01

    Antecedentes: la diabetes mellitus, además de ser un factor de riesgo para el infarto agudo del miocardio, parece conferir per se un peor pronóstico en los pacientes con esta entidad. Objetivo: evaluar el comportamiento del infarto agudo del miocardio en personas con diabetes mellitus de la provincia de Granma. Métodos: se realizó un estudio transversal y descriptivo con 159 pacientes que ingresaron en la Unidad de Cuidados Intensivos Coronarios del Hospital "Carlos Manuel de Céspedes", de Ba...

  16. Análisis de los resultados obtenidos durante la práctica clínica habitual en la reversión del bloqueo neuromuscular superficial con sugammadex : valoración de su impacto farmacoeconómico

    OpenAIRE

    Ripoll Coronado, Laura Isabel

    2014-01-01

    Introducción: Sugammadex revierte de manera rápida y eficaz el bloqueo neuromuscular (BNM) inducido por rocuronio y vecuronio. Sin embargo, la dosis requerida para la reversión del BNM superficial es aún desconocida, y se utiliza la misma dosis que para revertir el BNM moderado. Se investigó si dosis menores de sugammadex en la reversión del BNM superficial obtienen resultados no inferiores a la dosis empleada habitualmente y si sugammadex a estas dosis es superior a la neostigmina. Se valora...

  17. Análisis de los resultados obtenidos durante la práctica clínica habitual en la reversión del bloqueo neuromuscular superficial con sugammadex : valoración de su impacto farmacoeconómico

    OpenAIRE

    Ripoll Coronado, Laura Isabel

    2014-01-01

    Sugammadex revierte de manera rápida y eficaz el bloqueo neuromuscular (BNM) inducido por rocuronio y vecuronio. Sin embargo, la dosis requerida para la reversión del BNM superficial es aún desconocida, y se utiliza la misma dosis que para revertir el BNM moderado. Se investigó si dosis menores de sugammadex en la reversión del BNM superficial obtienen resultados no inferiores a la dosis empleada habitualmente y si sugammadex a estas dosis es superior a la neostigmina. Se valora el impacto fa...

  18. Multichannel system for angular distribution measurements

    International Nuclear Information System (INIS)

    Burjan, V.; Kroha, V.; Putz, K.

    A description is given of the individual blocks of the spectrometric apparatus used for measuring the angular distribution of particle spectra and excitation functions of (d,p) reactions at an electrostatic accelerator and the U-120 M cyclotron, both operating at the Nuclear Physics Institute of the Czechoslovak Academy of Sciences at Rez. Main attention was devoted to attaining maximum energy resolution at a high measurement efficiency, this by installing 8 independent spectrometric chains allowing simultaneous measurement of angular distribution in 8 points of the beam. The semiconductor detectors were cooled to -40 degC to -60 degC, which significantly reduced the level of inherent detector noise. An energy resolution of 13 keV was attained using Tesla detectors at a particle energy of 11 MeV. A brief review of data processing and software is given. (B.S.)

  19. Quantum entanglement of high angular momenta.

    Science.gov (United States)

    Fickler, Robert; Lapkiewicz, Radek; Plick, William N; Krenn, Mario; Schaeff, Christoph; Ramelow, Sven; Zeilinger, Anton

    2012-11-02

    Single photons with helical phase structures may carry a quantized amount of orbital angular momentum (OAM), and their entanglement is important for quantum information science and fundamental tests of quantum theory. Because there is no theoretical upper limit on how many quanta of OAM a single photon can carry, it is possible to create entanglement between two particles with an arbitrarily high difference in quantum number. By transferring polarization entanglement to OAM with an interferometric scheme, we generate and verify entanglement between two photons differing by 600 in quantum number. The only restrictive factors toward higher numbers are current technical limitations. We also experimentally demonstrate that the entanglement of very high OAM can improve the sensitivity of angular resolution in remote sensing.

  20. Bloqueo aurículo-ventricular congénito completo: Reporte de un caso y revisión de la literatura Congenital complete atrioventricular block: eport of one case and literature review

    Directory of Open Access Journals (Sweden)

    Alejandro Díaz D

    2008-02-01

    Full Text Available El bloqueo aurículo-ventricular completo congénito, es una entidad poco común, que presenta alta morbilidad y mortalidad con incidencia real que permanece desconocida y requiere alto índice de sospecha para su diagnóstico y, por ende, su temprana intervención. Se observa en hijos de madres con enfermedades autoinmunes del tejido conectivo, en especial, lupus eritematoso sistémico cuando su aparición es congénita. A nivel postnatal, es más frecuente que ocurra por cardiopatías congénitas. También puede manifestarse en corazones normales desde el punto de vista estructural. El hallazgo clínico característico es bradicardia persistente que se manifiesta desde la vida intrauterina y repercute en la estabilidad circulatoria del feto llegando a producir hidrops, complicación seria y letal. Después del nacimiento aparece igualmente con bradicardia que puede o no descompensar la parte hemodinámica del paciente. El diagnóstico se hace por sospecha clínica, con ecocardiografía fetal y postnatal, electrocardiograma y detección de anticuerpos maternos tipo antiRo y antiLa. La implantación de un marcapasos es el tratamiento definitivo que contribuye a mejorar la sobrevida y el pronóstico de estos pacientes. Se presenta el caso de una paciente prematura, de 31 semanas, debido a hidrops no inmune, en quien se diagnosticó bloqueo aurículo-ventricular completo congénito secundario a lupus materno confirmado por anticuerpos anti-nucleares francamente positivos y anticuerpos antiRo y antiLa positivos, quien recibió manejo con soporte inotrópico y posterior implantación de marcapasos. Presentó mejoría completa de la falla cardiaca y se remitió hacia otra institución para manejo convencional del prematuro.Complete congenital atrioventricular block is a rare entity that has a high morbidity and mortality. Its real incidence remains unknown and a high suspicion index is needed for its diagnosis and consequently for its early

  1. Behavior of nuclei at high angular momentum

    International Nuclear Information System (INIS)

    Stephens, F.S.

    1982-07-01

    The present report begins with a brief overview of nuclear shapes and level structures at high-spin values. The new spectroscopy associated with angular-momentum alignments is described, and some of the exciting possibilities of this spectroscopy are explored. Nuclear moments of inertia are discussed and a somewhat different one is defined, together with a method for measuring it and some early results. Finally a few comments on the future prospects for high-spin physics are offered

  2. Chirality and angular momentum in optical radiation

    Science.gov (United States)

    Coles, Matt M.; Andrews, David L.

    2012-06-01

    This paper develops, in precise quantum electrodynamic terms, photonic attributes of the “optical chirality density,” one of several measures long known to be conserved quantities for a vacuum electromagnetic field. The analysis lends insights into some recent interpretations of chiroptical experiments, in which this measure, and an associated chirality flux, have been treated as representing physically distinctive “superchiral” phenomena. In the fully quantized formalism the chirality density is promoted to operator status, whose exploration with reference to an arbitrary polarization basis reveals relationships to optical angular momentum and helicity operators. Analyzing multimode beams with complex wave-front structures, notably Laguerre-Gaussian modes, affords a deeper understanding of the interplay between optical chirality and optical angular momentum. By developing theory with due cognizance of the photonic character of light, it emerges that only the spin-angular momentum of light is engaged in such observations. Furthermore, it is shown that these prominent measures of the helicity of chiral electromagnetic radiation have a common basis in differences between the populations of optical modes associated with angular momenta of opposite sign. Using a calculation of the rate of circular dichroism as an example, with coherent states to model the electromagnetic field, it is discovered that two terms contribute to the differential effect. The primary contribution relates to the difference in left- and right-handed photon populations; the only other contribution, which displays a sinusoidal distance dependence corresponding to the claim of nodal enhancements, is connected with the quantum photon number-phase uncertainty relation. From the full analysis, it appears that the term “superchiral” can be considered redundant.

  3. Coherent Control of Photoelectron Wavepacket Angular Interferograms

    OpenAIRE

    Hockett, Paul; Wollenhaupt, Matthias; Baumert, Thomas

    2015-01-01

    Coherent control over photoelectron wavepackets, via the use of polarization-shaped laser pulses, can be understood as a time and polarization-multiplexed process. In this work, we investigate this multiplexing via computation of the observable photoelectron angular interferograms resulting from multi-photon atomic ionization with polarization-shaped laser pulses. We consider the polarization sensitivity of both the instantaneous and cumulative continuum wavefunction; the nature of the cohere...

  4. Adaptive Angular Sampling for SPECT Imaging

    OpenAIRE

    Li, Nan; Meng, Ling-Jian

    2011-01-01

    This paper presents an analytical approach for performing adaptive angular sampling in single photon emission computed tomography (SPECT) imaging. It allows for a rapid determination of the optimum sampling strategy that minimizes image variance in regions-of-interest (ROIs). The proposed method consists of three key components: (a) a set of close-form equations for evaluating image variance and resolution attainable with a given sampling strategy, (b) a gradient-based algor...

  5. Angular distribution of laser ablation plasma

    International Nuclear Information System (INIS)

    Kondo, K.; Kanesue, T.; Dabrowski, R.; Okamura, M.

    2010-01-01

    An expansion of a laser induced plasma is fundamental and important phenomena in a laser ion source. To understand the expanding direction, an array of Langmuir probes were employed. The chosen ion for the experiment was Ag 1+ which was created by a second harmonics of a Nd-YAG laser. The obtained angular distribution was about ±10 degree. This result also indicates a proper positioning of a solenoid magnet which enhances ion beam current.

  6. Coincident-inclusive electrofission angular correlations

    International Nuclear Information System (INIS)

    Arruda Neto, J.D.T.

    1983-08-01

    A method for the joint analysis of coincident and inclusive electrofission data, in order to minimize effects of the model dependence of data interpretation, is developed. Explicit calculations of the (e,e'f) angular correlations are presented. The potentialities of the method to the study of sub- and near-barrier properties of the fission process, and to the study of the giant resonances fission mode, are discussed. (Author) [pt

  7. Positron annihilation and perturbed angular correlation studies of radiation damage

    International Nuclear Information System (INIS)

    Zhu Jiazheng; Li Anli; Xu Yongjun; Wang Zhiqiang; Zhou Dongmei; Zheng Yongnan; Zhu Shengyun; Iwata, T.

    2002-01-01

    The positron annihilation and perturbed angular correlation techniques have been employed to study radiation damage in Si and Nb. The results obtained by the positron annihilation are consistent with those given by the perturbed angular correlation

  8. Sorting and quantifying orbital angular momentum of laser beams

    CSIR Research Space (South Africa)

    Schulze, C

    2013-10-01

    Full Text Available We present a novel tool for sorting the orbital angular momentum and to determine the orbital angular momentum density of laser beams, which is based on the use of correlation filters....

  9. High Angular Momentum Rydberg Wave Packets

    Science.gov (United States)

    Wyker, Brendan

    2011-12-01

    High angular momentum Rydberg wave packets are studied. Application of carefully tailored electric fields to low angular momentum, high- n (n ˜ 300) Rydberg atoms creates coherent superpositions of Stark states with near extreme values of angular momentum, ℓ. Wave packet components orbit the parent nucleus at rates that depend on their energy, leading to periods of localization and delocalization as the components come into and go out of phase with each other. Monitoring survival probability signals in the presence of position dependent probing leads to observation of characteristic oscillations based on the composition of the wave packet. The discrete nature of electron energy levels is observed through the measurement of quantum revivals in the wave packet localization signal. Time-domain spectroscopy of these signals allows determination of both the population and phase of individual superposition components. Precise manipulation of wave packets is achieved through further application of pulsed electric fields. Decoherence effects due to background gas collisions and electrical noise are also detailed. Quantized classical trajectory Monte-Carlo simulations are introduced and agree remarkably well with experimental results.

  10. Verification of angular dependence in MOSFET detector

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Clayton H.; Shorto, Julian M.B.; Siqueira, Paulo T.D.; Nunes, Maíra G.; Silva Junior, Iremar A.; Yoriyaz, Hélio, E-mail: chsouza@usp.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2017-07-01

    In vivo dosimetry is an essential tool for quality assurance programs, being a procedure commonly performed with thermoluminescent dosimeters (TLDs) or diodes. However, a type of dosimeter that has increasing popularity in recent years is the metal-oxide-semiconductor field effect transistor (MOSFET) detector. MOSFET dosimeters fulfill all the necessary characteristics to realize in vivo dosimetry since it has a small size, good precision and feasibility of measurement, as well as easy handling. Nevertheless, its true differential is to allow reading of the dose in real time, enabling immediate intervention in the correction of physical parameters deviations and anticipation of small anatomical changes in a patient during treatment. In order for MOSFET dosimeter to be better accepted in clinical routine, information reporting performance should be available frequently. For this reason, this work proposes to verify reproducibility and angular dependence of a standard sensitivity MOSFET dosimeter (TN-502RD-H) for Cs-137 and Co-60 sources. Experimental data were satisfactory and MOSFET dosimeter presented a reproducibility of 3.3% and 2.7% (1 SD) for Cs-137 and Co-60 sources, respectively. In addition, an angular dependence of up to 6.1% and 16.3% for both radioactive sources, respectively. It is conclusive that MOSFET dosimeter TN-502RD-H has satisfactory reproducibility and a considerable angular dependence, mainly for the Co-60 source. This means that although precise measurements, special attention must be taken for applications in certain anatomical regions in a patient. (author)

  11. Physics from angular projection of rectangular grids

    International Nuclear Information System (INIS)

    Singh, Ashmeet

    2015-01-01

    In this paper, we present a mathematical model for the angular projection of a rectangular arrangement of points in a grid. This simple yet interesting, problem has both scholarly value and applications for data extraction techniques to study the physics of various systems. Our work may help undergraduate students to understand subtle points in the angular projection of a grid and describes various quantities of interest in the projection with completeness and sufficient rigour. We show that for certain angular ranges, the projection has non-distinctness, and calculate the details of such angles, and correspondingly, the number of distinct points and the total projected length. We focus on interesting trends obtained for the projected length of the grid elements and present a simple application of the model to determine the geometry of an unknown grid whose spatial extensions are known, using measurement of the grid projection at two angles only. Towards the end, our model is shown to have potential applications in various branches of physical sciences, including crystallography, astrophysics, and bulk properties of materials. (paper)

  12. The Cosmology Large Angular Scale Surveyor (CLASS)

    Science.gov (United States)

    Harrington, Kathleen; Marriange, Tobias; Aamir, Ali; Appel, John W.; Bennett, Charles L.; Boone, Fletcher; Brewer, Michael; Chan, Manwei; Chuss, David T.; Colazo, Felipe; hide

    2016-01-01

    The Cosmology Large Angular Scale Surveyor (CLASS) is a four telescope array designed to characterize relic primordial gravitational waves from in ation and the optical depth to reionization through a measurement of the polarized cosmic microwave background (CMB) on the largest angular scales. The frequencies of the four CLASS telescopes, one at 38 GHz, two at 93 GHz, and one dichroic system at 145/217 GHz, are chosen to avoid spectral regions of high atmospheric emission and span the minimum of the polarized Galactic foregrounds: synchrotron emission at lower frequencies and dust emission at higher frequencies. Low-noise transition edge sensor detectors and a rapid front-end polarization modulator provide a unique combination of high sensitivity, stability, and control of systematics. The CLASS site, at 5200 m in the Chilean Atacama desert, allows for daily mapping of up to 70% of the sky and enables the characterization of CMB polarization at the largest angular scales. Using this combination of a broad frequency range, large sky coverage, control over systematics, and high sensitivity, CLASS will observe the reionization and recombination peaks of the CMB E- and B-mode power spectra. CLASS will make a cosmic variance limited measurement of the optical depth to reionization and will measure or place upper limits on the tensor-to-scalar ratio, r, down to a level of 0.01 (95% C.L.).

  13. The Cosmology Large Angular Scale Surveyor

    Science.gov (United States)

    Harrington, Kathleen; Marriage, Tobias; Ali, Aamir; Appel, John; Bennett, Charles; Boone, Fletcher; Brewer, Michael; Chan, Manwei; Chuss, David T.; Colazo, Felipe; hide

    2016-01-01

    The Cosmology Large Angular Scale Surveyor (CLASS) is a four telescope array designed to characterize relic primordial gravitational waves from inflation and the optical depth to reionization through a measurement of the polarized cosmic microwave background (CMB) on the largest angular scales. The frequencies of the four CLASS telescopes, one at 38 GHz, two at 93 GHz, and one dichroic system at 145217 GHz, are chosen to avoid spectral regions of high atmospheric emission and span the minimum of the polarized Galactic foregrounds: synchrotron emission at lower frequencies and dust emission at higher frequencies. Low-noise transition edge sensor detectors and a rapid front-end polarization modulator provide a unique combination of high sensitivity, stability, and control of systematics. The CLASS site, at 5200 m in the Chilean Atacama desert, allows for daily mapping of up to 70% of the sky and enables the characterization of CMB polarization at the largest angular scales. Using this combination of a broad frequency range, large sky coverage, control over systematics, and high sensitivity, CLASS will observe the reionization and recombination peaks of the CMB E- and B-mode power spectra. CLASS will make a cosmic variance limited measurement of the optical depth to reionization and will measure or place upper limits on the tensor-to-scalar ratio, r, down to a level of 0.01 (95% C.L.).

  14. A neural circuit for angular velocity computation

    Directory of Open Access Journals (Sweden)

    Samuel B Snider

    2010-12-01

    Full Text Available In one of the most remarkable feats of motor control in the animal world, some Diptera, such as the housefly, can accurately execute corrective flight maneuvers in tens of milliseconds. These reflexive movements are achieved by the halteres, gyroscopic force sensors, in conjunction with rapidly-tunable wing-steering muscles. Specifically, the mechanosensory campaniform sensilla located at the base of the halteres transduce and transform rotation-induced gyroscopic forces into information about the angular velocity of the fly's body. But how exactly does the fly's neural architecture generate the angular velocity from the lateral strain forces on the left and right halteres? To explore potential algorithms, we built a neuro-mechanical model of the rotation detection circuit. We propose a neurobiologically plausible method by which the fly could accurately separate and measure the three-dimensional components of an imposed angular velocity. Our model assumes a single sign-inverting synapse and formally resembles some models of directional selectivity by the retina. Using multidimensional error analysis, we demonstrate the robustness of our model under a variety of input conditions. Our analysis reveals the maximum information available to the fly given its physical architecture and the mathematics governing the rotation-induced forces at the haltere's end knob.

  15. Continuous particle spectra and their angular distributions

    International Nuclear Information System (INIS)

    Sastry, Ch.V.; Jain, R.K.; Rama Rao, J.; Ernst, J.; Machner, H.

    1996-01-01

    The angular distribution of continuous particle spectra in pre-equilibrium reactions is still an unsolved problem, particularly so at forward angles. In the present work, the angular distributions of alpha particles emitted in (α, α',x) reactions in the target elements gold and rhodium have been studied in detail. Alpha particle beams of energy 60 MeV from the Variable Energy Cyclotron of Calcutta were used in these experiments. The theoretical calculations were done using an extended exciton model of Kalbach incorporated into the Computer Code PRECO-D2. The formalism used in the exciton model was modified to include division of pre equilibrium cross section into multi-step direct (MSD) and multi-step compound (MSC) components. These MSD and MSC cross sections were used to calculate the angular distributions in terms of Legendre polynomials whose coefficients are given by simple phenomenological relations. Even with a reasonable set of parameters, the agreement between theory and experiment was far from satisfactory at forward angles. Similar conclusion was also drawn in the case of continuous particle spectra of deuterons in (d, d'x) reactions at 25 MeV in various targets. (author). 10 refs., 2 figs

  16. Verification of angular dependence in MOSFET detector

    International Nuclear Information System (INIS)

    Souza, Clayton H.; Shorto, Julian M.B.; Siqueira, Paulo T.D.; Nunes, Maíra G.; Silva Junior, Iremar A.; Yoriyaz, Hélio

    2017-01-01

    In vivo dosimetry is an essential tool for quality assurance programs, being a procedure commonly performed with thermoluminescent dosimeters (TLDs) or diodes. However, a type of dosimeter that has increasing popularity in recent years is the metal-oxide-semiconductor field effect transistor (MOSFET) detector. MOSFET dosimeters fulfill all the necessary characteristics to realize in vivo dosimetry since it has a small size, good precision and feasibility of measurement, as well as easy handling. Nevertheless, its true differential is to allow reading of the dose in real time, enabling immediate intervention in the correction of physical parameters deviations and anticipation of small anatomical changes in a patient during treatment. In order for MOSFET dosimeter to be better accepted in clinical routine, information reporting performance should be available frequently. For this reason, this work proposes to verify reproducibility and angular dependence of a standard sensitivity MOSFET dosimeter (TN-502RD-H) for Cs-137 and Co-60 sources. Experimental data were satisfactory and MOSFET dosimeter presented a reproducibility of 3.3% and 2.7% (1 SD) for Cs-137 and Co-60 sources, respectively. In addition, an angular dependence of up to 6.1% and 16.3% for both radioactive sources, respectively. It is conclusive that MOSFET dosimeter TN-502RD-H has satisfactory reproducibility and a considerable angular dependence, mainly for the Co-60 source. This means that although precise measurements, special attention must be taken for applications in certain anatomical regions in a patient. (author)

  17. Generación de inclusiones no metálicas y su efecto sobre el bloqueo de boquillas de colada continua en aceros ultra bajo carbono estabilizados con titanio

    Directory of Open Access Journals (Sweden)

    Vega-Becerra, O.

    2005-12-01

    Full Text Available This work presents a thermodynamic and experimental analysis of the phases that precipitate in the non metallic inclusions depending on the contents of aluminium (Al, titanium (Ti and oxygen (O in the steel, and their influence on the nozzle clogging. For the thermodynamic analysis, the program FACT WIN (Facility For The Analysis of Chemical Thermodynamics subroutine Equilib. was used. The experimental tests were carried out in an TAMMANN furnace, in an argon atmosphere. The control of the content of dissolved oxygen was carried out by means of sensors of solid electrolyte bases zirconia. The characterization of the inclusions was carried out with SEM, EDS and by means of the technique of fractional reduction with carbon. A good agreement was observed between the thermodynamic predictions and the experimental results.

    En este trabajo se presenta un análisis termodinámico y experimental de las fases que precipitan en inclusiones no metálicas en función de los contenidos de aluminio (Al, titanio (Ti y oxígeno (O en el acero y su influencia sobre el bloqueo de boquillas de colada continua. Para el análisis termodinámico se utilizó el programa FACT-WIN (Facility For The Analysis of Chemical Thermodynamics subrutina Equilib. Las pruebas experimentales se realizaron en un horno TAMMANN, en atmósfera de argón. El control del contenido de oxígeno disuelto se llevó a cabo mediante sensores de electrólito sólido base zirconia. La caracterización de las inclusiones se realizó por SEM, EDS y mediante la técnica de reducción fraccionada con carbono. Se observó una buena concordancia entre las predicciones termodinámicas y los resultados experimentales.

  18. Analgesia pós-operatória em correção cirúrgica de pé torto congênito: comparação entre bloqueio nervoso periférico e bloqueio peridural caudal Analgesia postoperatoria en corrección quirúrgica de pie jorobado congénito: comparación entre bloqueo nervioso periférico y bloqueo epidural caudal Postoperative analgesia for the surgical correction of congenital clubfoot: comparison between peripheral nerve block and caudal epidural block

    Directory of Open Access Journals (Sweden)

    Monica Rossi Rodrigues

    2009-12-01

    con dolor postoperatorio intenso. La técnica más utilizada en niños es la epidural caudal asociada a la anestesia general. Posee la limitante de una corta duración de la analgesia postoperatoria. Los bloqueos de nervios periféricos han sido indicados como procedimientos con una baja incidencia de complicaciones y un tiempo prolongado de analgesia. El objetivo del estudio actual, fue comparar el tiempo de analgesia de los bloqueos nerviosos periféricos y del bloqueo caudal y el consumo de morfina, en las primeras 24 horas después de la corrección de PJC en niños. MÉTODO: Estudio randómico doble ciego, en niños sometidos a la intervención quirúrgica para liberación posteromedial de PJC, ubicadas en cuatro grupos conforme a la técnica anestésica: caudal (ACa; bloqueos isquiático y femoral (IF; bloqueos isquiático y safeno (IS; bloqueo isquiático y anestesia local (IL, asociados a la anestesia general. En las primeras 24 horas, los pacientes recibieron dipirona y paracetamol vía oral y fueron evaluados por un anestesiólogo que no conocía la técnica usada. Conforme a las puntuaciones de la escala CHIPPS (Children's and infants postoperative pain scale, se administraba morfina vía oral (0,19 mg.kg-1 por día. RESULTADOS: Fueron estudiados 118 niños distribuidos en los grupos ACa (30, IF (32, IS (28 IL (28. El tiempo promedio entre el bloqueo y la primera dosis de morfina fue de 6,16 horas en el grupo ACa, 7,05 horas en el IF, 7,58 horas en el IS y 8,18 horas en el IL. El consumo de morfina fue de 0,3 mg.kg-1 por día en los cuatro grupos. No hubo diferencia significativa entre los grupos. CONCLUSIONES: Los bloqueos nerviosos periféricos no promovieron un tiempo más elevado de analgesia, ni tampoco una reducción en el consumo de morfina en las primeras 24 horas, en niños sometidos a la corrección de PJC cuando se les comparó con el bloqueo epidural caudal.BACKGROUND AND OBJECTIVES: Correction of congenital clubfoot (CCF is associated with

  19. Miocárdio não compactado em paciente com infarto agudo do miocárdio Miocardio no compactado en paciente con infarto agudo de miocardio Noncompaction of the myocardium in a patient with acute myocardial infarction

    Directory of Open Access Journals (Sweden)

    Emanuel Correia

    2010-05-01

    Full Text Available Miocárdio não compactado (MCNC é uma cardiopatia congênita rara, resultado da falha na compactação do miocárdio, levando à persistência de trabeculações numerosas e profundas, comunicantes com a cavidade ventricular. Tem como principais manifestações clínicas: insuficiência cardíaca, eventos arrítmicos (supraventriculares ou ventriculares e episódios de embolismo arterial. Apresenta-se o caso de um cidadão brasileiro residente em Portugal internado por infarto agudo do miocárdio, do qual resultou disfunção sistólica severa do ventrículo esquerdo. No decorrer do estudo diagnosticou-se MCNC. Descreve-se a apresentação clínica, ecocardiográfica (bidimensional e tridimensional, imagem de ressonância magnética nuclear (RMN e ventriculografia. Discutem-se os critérios diagnósticos e opções terapêuticas.El miocardio no compactado (MCNC es una cardiopatía congénita rara, resultado de la falla en la compactación del miocardio, y ocasiona la persistencia de trabeculaciones numerosas y profundas, comunicantes con la cavidad ventricular. Tiene como principales manifestaciones clínicas: insuficiencia cardiaca, eventos arrítmicos (supraventriculares o ventriculares y episodios de embolismo arterial.Left-ventricular non-compaction (LVNC is a rare congenital cardiopathy, which results from the failure of the myocardial compaction process, leading to the persistence of numerous and deep trabeculations communicating with the ventricular cavity. Its main clinical manifestations are heart failure, arrhythmias (supraventricular or ventricular and episodes of arterial embolism. The present case reports on a Brazilian patient living in Portugal, who was hospitalized due to acute myocardial infarction, which resulted in severe LV systolic dysfunction. During the patient's assessment, LVNC was diagnosed. The clinical presentation is described, as well as the echocardiographic evaluation (two-dimensional and three

  20. Edema agudo hemorrágico da infância: relato de três casos Acute hemorrhagic edema of infancy: report of three cases

    Directory of Open Access Journals (Sweden)

    Paulo Sergio Emerich

    2011-12-01

    Full Text Available O Edema Agudo Hemorrágico da Infância é uma vasculite leucocitoclástica pouco frequente, que ocorre, quase exclusivamente, em crianças entre 4 meses e 2 anos de idade. Caracteriza-se, clinicamente, pela tríade febre, lesões purpúricas na face, pavilhões auriculares e extremidades e edema. Embora os achados cutâneos sejam dramáticos e de surgimento rápido, o prognóstico é favorável, com resolução espontânea dentro de 1 a 3 semanas. Descrevem-se três casos cujos achados clínicos e histopatológicos são característicos de edema agudo hemorrágico da infância.Acute Hemorrhagic Edema of Infancy is an infrequent leukocytoclastic vasculitis which occurs almost exclusively in children between 4 months and 2 years of age. It is clinically characterized by the triad fever, purpuric lesions on the face, auricular pinna and extremities, and edema. Although the cutaneous findings are dramatic and of rapid onset, the prognosis is favorable, with spontaneous resolution within 1 to 3 weeks. Three cases are described in which clinical and histopathological findings are characteristic of acute hemorrhagic edema of infancy.

  1. Trastornos psiquiátricos frecuentes post infarto agudo al miocardio y su relación pronóstica. Revisión de la literatura.

    Directory of Open Access Journals (Sweden)

    Manuel Mallol Simmonds

    2017-07-01

    Full Text Available La enfermedad cardiovascular es la principal causa de muerte a nivel mundial. De ella, el Infarto Agudo al Miocardio (IAM y el Accidente Cerebrovascular (AVC se encuentran fuertemente asociados a los cambios ambientales y sociales del último tiempo, tales como aumento de ingesta de comida rápida, sedentarismo, tabaquismo, entre otros. Algunos trastornos psiquiátricos que aparecen a corto y largo plazo posterior al evento coronario agudo tienen una implicancia directa en la morbimortalidad cardiovascular y global. De ellos, la depresión representa el trastorno psiquiátrico más frecuente, pudiendo encontrarse en 3 de cada 10 pacientes que tuvieron un IAM. La depresión aumenta las hospitalizaciones, disminuye la adherencia terapéutica y empeora el pronóstico cardiovascular a largo plazo.  La fisiopatología en lo anterior es explicada en parte por alteraciones en el eje neuroendocrino y la respuesta al estrés, mientras que otros fenómenos permanecen aún desconocidos. Dentro de otros trastornos psiquiátricos asociados a un IAM se encuentran el delirium, ansiedad y trastornos de la personalidad. En función de lo anterior, se hace necesaria la incorporación de un sistema continuo de monitoreo y apoyo en salud mental en este grupo de pacientes para mejorar tanto su pronóstico como la calidad de vida.

  2. Efectividad del modelo de cuidado de enfermería para la familia de paciente con infarto agudo al miocardio en la unidad de cuidados intensivos

    Directory of Open Access Journals (Sweden)

    David Jahel Garcia Avendaño

    2015-05-01

    Full Text Available Introducción: Este protocolo de investigación tiene la finalidad de intervenir con la familia y determinar la efectividad del Modelo de Cuidado de Enfermería para la Familia de Paciente con Infarto Agudo al Miocardio (IAM en la Unidad de Cuidados Intensivos (UCI. Materiales y Métodos: Estudio descriptivo de intervención familiar. Resultados y Discusión: El 100% de las familias respondió afirmativamente que la enfermera familiar les informo sobre los cuidados a realizar en la familia según las necesidades detectadas, estableció un plan de intervención en la familia mismo que cumplió y se interesó para que dentro de lo posible la estancia en la familia sea agradable. Conclusiones: Los resultados de esta investigación de intervención a las familias de paciente con IAM en las UCI aporta resultados que apoyan la importancia de aplicar un Modelo de Cuidado de Enfermería Familiar en dichas unidades.Cómo citar este artículo: García DJ, Estrada MC, Gallegos M, Antuna AB. Efectividad del modelo de cuidado de enfermería para la familia de paciente con infarto agudo al miocardio en la unidad de cuidados intensivos. Rev Cuid. 2015; 6(1: 923-31. http://dx.doi.org/10.15649/cuidarte.v6i1.166

  3. Investigación de vectores y reservorios en brote de Chagas agudo por posible transmisión oral en Aguachica, Cesar, Colombia

    Directory of Open Access Journals (Sweden)

    Hugo Soto

    2014-04-01

    Full Text Available Colombia tiene un registro de 11 casos de Chagas agudo y 80 casos por contaminación oral con Trypanosoma cruzi. Este trabajo analiza los hallazgos entomológicos y parasitológicos del brote de Aguachica, Cesar, en 2010. Un grupo interdisciplinario de profesionales de la salud y de universidades regionales realizó las pruebas de laboratorio a los pacientes y el estudio del foco de transmisión. Se detectaron 11 casos agudos de enfermedad de Chagas en una sola familia con vivienda sin triatominos domiciliados y, Rhodnius pallescens, Pantrongylus geniculatus, Eratyrus cuspidatus y dos Didelphis marsupialis infectados con T. cruzi en palmas de Attalea butyracea y Elaeis oleifera del área urbana de Aguachica. Se analiza la participación del R. pallescens y el rol de las palmas en el ciclo silvestre de T. cruzi y para la transmisión oral de la enfermedad de Chagas. Incursiones esporádicas de R. pallescens, P. geniculatus y E. cuspidatus silvestres desde palmas cercanas al domicilio humano pueden provocar brotes cada vez más frecuentes de Chagas oral.

  4. Natural roller bearing fault detection by angular measurement of true instantaneous angular speed

    Science.gov (United States)

    Renaudin, L.; Bonnardot, F.; Musy, O.; Doray, J. B.; Rémond, D.

    2010-10-01

    The challenge in many production activities involving large mechanical devices like power transmissions consists in reducing the machine downtime, in managing repairs and in improving operating time. Most online monitoring systems are based on conventional vibration measurement devices for gear transmissions or bearings in mechanical components. In this paper, we propose an alternative way of bearing condition monitoring based on the instantaneous angular speed measurement. By the help of a large experimental investigation on two different applications, we prove that localized faults like pitting in bearing generate small angular speed fluctuations which are measurable with optical or magnetic encoders. We also emphasize the benefits of measuring instantaneous angular speed with the pulse timing method through an implicit angular sampling which ensures insensitivity to speed fluctuation. A wide range of operating conditions have been tested for the two applications with varying speed, load, external excitations, gear ratio, etc. The tests performed on an automotive gearbox or on actual operating vehicle wheels also establish the robustness of the proposed methodology. By the means of a conventional Fourier transform, angular frequency channels kinematically related to the fault periodicity show significant magnitude differences related to the damage severity. Sideband effects are evidently seen when the fault is located on rotating parts of the bearing due to load modulation. Additionally, slip effects are also suspected to be at the origin of enlargement of spectrum peaks in the case of double row bearings loaded in a pure radial direction.

  5. Angular dispersion and deflection function for heavy ion elastic scattering

    International Nuclear Information System (INIS)

    Bai Zhen; Han Jianlong; Hu Zhengguo; Chinese Academy of Sciences, Beijing

    2007-01-01

    The differential cross sections for elastic scattering products of 17 F on 208 Pb have been measured. The angular dispersion plots of ln(dσ/dθ) versus θ 2 are obtained from the angular distribution of the elastic scattering differential cross sections. Systematical analysis on the angular dispersion for the available experimental data indicates that there is an angular dispersion turning angle at forward angular range within the grazing angle. This turning angle can be clarified as nuclear rainbow in classical deflection function. The exotic behaviour of the nuclear rainbow angle offers a new probe to investigate the halo and skin phenomena. (authors)

  6. Calidad de la atención médica a pacientes con infarto agudo del miocardio. Cienfuegos 2011

    Directory of Open Access Journals (Sweden)

    Hilda María Delgado Acosta

    2013-09-01

    Full Text Available Fundamento: la evaluación constituye una herramienta para mejorar la calidad de la atención a los pacientes. Objetivo: evaluar la calidad de la atención médica a pacientes con infarto agudo de miocardio admitidos en el Hospital General Universitario Dr. Gustavo Aldereguía Lima de Cienfuegos en junio de 2011. Métodos: se realizó una investigación de sistemas y servicios de salud en la que se analizaron como variables: las relacionadas con estructura (recursos humanos y materiales, procesos (cumplimiento de los protocolos establecidos para la atención y resultados (impacto en la mortalidad. Se aplicó un formulario a los 22 pacientes estudiados, se utilizó una guía de observación que evaluó la existencia de recursos humanos y materiales necesarios para la atención en el hospital. Los datos se procesaron en el programa SPSS 15,0 y se expresaron en números absolutos y porcientos. Resultados: en la dimensión estructura no se encontraron carencias de recursos materiales esenciales para la atención, hubo dificultades con la cobertura de enfermería en el Servicio de Cardiología. En la atención prehospitalaria hubo demora en acudir a consulta, dificultades en la prescripción de aspirina y la no realización de trombólisis. En la posthospitalaria se centraron en la rehabilitación y trabajo en la modificación de los factores de riesgo asociados. En el hospital hubo dificultades en la realización de las pruebas ergométricas al alta y en la remisión para la rehabilitación en el Área de Salud. Conclusiones: existen dificultades en la calidad de atención a los pacientes, dificultades que se hacen más evidentes en la Atención Primaria de Salud.

  7. 123. Intervención quirúrgica urgente en paciente varón joven con angiosarcoma primario cardíaco con diagnóstico de tromboembolismo pulmonar agudo

    Directory of Open Access Journals (Sweden)

    N. Miranda

    2012-04-01

    Conclusiones: Son infrecuentes los casos de sarcoma cardíaco primario publicados en la bibliografía y muy pocos los que han cursado como tromboembolismo pulmonar agudo. Este caso ilustra la enorme dificultad que presentan para un diagnóstico y tratamiento precoz que ofrezca unas mínimas expectativas de vida a medio plazo.

  8. Prevalencia y curso clínico de la infección por dengue en adultos mayores con cuadro febril agudo en un hospital de alta complejidad en Cali, Colombia

    Directory of Open Access Journals (Sweden)

    Fernando Rosso

    2016-08-01

    Conclusión. La infección por dengue fue frecuente en adultos mayores como causa de síndrome febril agudo. Una importante proporción requirió hospitalización y presentó complicaciones, sin embargo, el manejo adecuado evitó los casos fatales.

  9. Angular Momentum and Galaxy Formation Revisited

    Science.gov (United States)

    Romanowsky, Aaron J.; Fall, S. Michael

    2012-12-01

    Motivated by a new wave of kinematical tracers in the outer regions of early-type galaxies (ellipticals and lenticulars), we re-examine the role of angular momentum in galaxies of all types. We present new methods for quantifying the specific angular momentum j, focusing mainly on the more challenging case of early-type galaxies, in order to derive firm empirical relations between stellar j sstarf and mass M sstarf (thus extending earlier work by Fall). We carry out detailed analyses of eight galaxies with kinematical data extending as far out as 10 effective radii, and find that data at two effective radii are generally sufficient to estimate total j sstarf reliably. Our results contravene suggestions that ellipticals could harbor large reservoirs of hidden j sstarf in their outer regions owing to angular momentum transport in major mergers. We then carry out a comprehensive analysis of extended kinematic data from the literature for a sample of ~100 nearby bright galaxies of all types, placing them on a diagram of j sstarf versus M sstarf. The ellipticals and spirals form two parallel j sstarf-M sstarf tracks, with log-slopes of ~0.6, which for the spirals are closely related to the Tully-Fisher relation, but for the ellipticals derives from a remarkable conspiracy between masses, sizes, and rotation velocities. The ellipticals contain less angular momentum on average than spirals of equal mass, with the quantitative disparity depending on the adopted K-band stellar mass-to-light ratios of the galaxies: it is a factor of ~3-4 if mass-to-light ratio variations are neglected for simplicity, and ~7 if they are included. We decompose the spirals into disks and bulges and find that these subcomponents follow j sstarf-M sstarf trends similar to the overall ones for spirals and ellipticals. The lenticulars have an intermediate trend, and we propose that the morphological types of galaxies reflect disk and bulge subcomponents that follow separate, fundamental j sstarf

  10. Cardiomiopatía hipertrófica y síndrome de Wolff-Parkinson-White con bloqueo aurículo-ventricular completo. Una extraña asociación: Reporte de un caso Hypertrophic cardiomyopathy and Wolff-Parkinson-White Syndrome with complete auriculoventricular block. A strange association: Report of one case

    Directory of Open Access Journals (Sweden)

    Franco J Vallejo

    2007-12-01

    Full Text Available Paciente masculino de 22 años quien ingresa por episodio de síncope. En el electrocardiograma se encuentra patrón de Wolff-Parkinson-White y signos de sobrecarga auricular e hipertrofia ventricular izquierda con bloqueo aurículo-ventricular completo. El ecocardiograma transtorácico es compatible con cardiomiopatía hipertrófica no obstructiva. Se lleva a estudio electrofisiológico donde se encuentra pre-excitación por vía accesoria y bloqueo aurículo-ventricular infrahisiano; se realiza ablación y se implanta marcapasos bicameral.A 22 years old male patient is admitted for a syncope episode. An electrocardiogram shows a Wolff-Parkinson-White pattern and signs of auricular overload with left ventricular hypertrophy and complete auriculoventricular block. The transthoracic echocardiogram is compatible with non-obstructive hypertrophic cardiomyopathy. An electrophysiological study is carried out, finding pre-excitation through an accessory way and infra-His auriculoventricular block. An ablation is performed and a bicameral pacemaker is implanted.

  11. The angular momentum of isolated white dwarfs

    Directory of Open Access Journals (Sweden)

    Brassard P.

    2013-03-01

    Full Text Available This is a very brief report on an ongoing program aimed at mapping the internal rotation profiles of stars through asteroseismology. Three years ago, we developed and applied successfully a new technique to the pulsating GW Vir white dwarf PG 1159−035, and were able to infer that it rotates very slowly and rigidly over some 99% of its mass. We applied the same approach to the three other GW Vir pulsators with available rotational splitting data, and found similar results. We discuss the implications of these findings on the question of the angular momentum of white dwarfs resulting from single star evolution.

  12. Projection of angular momentum via linear algebra

    Science.gov (United States)

    Johnson, Calvin W.; O'Mara, Kevin D.

    2017-12-01

    Projection of many-body states with good angular momentum from an initial state is usually accomplished by a three-dimensional integral. We show how projection can instead be done by solving a straightforward system of linear equations. We demonstrate the method and give sample applications to 48Cr and 60Fe in the p f shell. This new projection scheme, which is competitive against the standard numerical quadrature, should also be applicable to other quantum numbers such as isospin and particle number.

  13. Angular Position Tracking Control of a Quadcopter

    OpenAIRE

    T. V. Glazkov; A. E. Golubev

    2017-01-01

    The paper dwells on tracking the quad-copter angular position with desired quality parameters of transient processes. The aerial vehicle is considered as a rigid body with six degrees of freedom.  A full rigid body quad-copter mathematical model is considered without the assumption of smallness of the Euler angles.Among the most well known methods of non-linear stabilization are feedback linearization and backstepping. The backstepping approach allows us to have an effective solution of the s...

  14. Optical communication beyond orbital angular momentum

    CSIR Research Space (South Africa)

    Trichili, A

    2016-06-01

    Full Text Available :27674 | DOI: 10.1038/srep27674 www.nature.com/scientificreports Optical communication beyond orbital angular momentum Abderrahmen Trichili1, Carmelo Rosales-Guzmán2, Angela Dudley2,3, Bienvenu Ndagano2, Amine Ben Salem1, Mourad Zghal1,4 & Andrew Forbes2 Mode....rosalesguzman@wits.ac.za) received: 29 March 2016 Accepted: 24 May 2016 Published: 10 June 2016 OPEN www.nature.com/scientificreports/ 2Scientific RepoRts | 6:27674 | DOI: 10.1038/srep27674 Results Consider a LG mode in cylindrical coordinates, at its waist plane (z = 0), described...

  15. Angular momentum in multi-step photoionization

    International Nuclear Information System (INIS)

    Yoshida, Tadashi; Adachi, Hajime; Kuwako, Akira; Nittoh, Koichi; Araki, Yoshio; Watanabe, Takashi; Yoguchi, Itaru.

    1995-01-01

    The effect of the angular momenta on the multi-step laser-ionization efficiency was investigated numerically for cases with and without the hyperfine interactions. For either cases the ionization efficiency proved to depend appreciably on the values of J in the excitation ladder. In this respect, we elaborated a simple and efficient method of determining J, which was based on the laser polarization dependence of the excitation rate. Application of this method to a couple of real excitation ladders proved its usefulness and reliability. (author)

  16. Statistical analysis of angular correlation measurements

    International Nuclear Information System (INIS)

    Oliveira, R.A.A.M. de.

    1986-01-01

    Obtaining the multipole mixing ratio, δ, of γ transitions in angular correlation measurements is a statistical problem characterized by the small number of angles in which the observation is made and by the limited statistic of counting, α. The inexistence of a sufficient statistics for the estimator of δ, is shown. Three different estimators for δ were constructed and their properties of consistency, bias and efficiency were tested. Tests were also performed in experimental results obtained in γ-γ directional correlation measurements. (Author) [pt

  17. Time-dependent angularly averaged inverse transport

    International Nuclear Information System (INIS)

    Bal, Guillaume; Jollivet, Alexandre

    2009-01-01

    This paper concerns the reconstruction of the absorption and scattering parameters in a time-dependent linear transport equation from knowledge of angularly averaged measurements performed at the boundary of a domain of interest. Such measurement settings find applications in medical and geophysical imaging. We show that the absorption coefficient and the spatial component of the scattering coefficient are uniquely determined by such measurements. We obtain stability results on the reconstruction of the absorption and scattering parameters with respect to the measured albedo operator. The stability results are obtained by a precise decomposition of the measurements into components with different singular behavior in the time domain

  18. Angular momentum effects in subbarrier fusion

    International Nuclear Information System (INIS)

    Halbert, M.L.; Beene, J.R.; Hensley, D.C.; Honkanen, K.; Semkow, T.M.; Abenante, V.; Sarantites, D.G.; Li, Z.

    1987-01-01

    The authors discuss angular-momentum distributions σ l for the compound nucleus 164 Yb deduced from measurements of γ-ray multiplicity for all significant evaporation residues from fusion of 64 Ni and 100 Mo and 16 O + 148 Sm. At the lowest bombarding energies the σ l extend to higher l values than do predictions that include coupling of the principal inelastic channels, even if the coupling strengths are increased to match the experimental excitation function. Likewise, σ l from an energy-dependent real potential fitted to the excitation function fails to reproduce the experimental σ l distribution. No effects attributed to superdeformation were observed

  19. Energy flow in angularly dispersive optical systems

    International Nuclear Information System (INIS)

    Ware, M.; Dibble, W. E.; Glasgow, S. A.; Peatross, J.

    2001-01-01

    Light-pulse propagation in angularly dispersive systems is explored in the context of a center-of-mass definition of energy arrival time. In this context the time of travel is given by a superposition of group delays weighted by the spectral content of the pulse. With this description the time of travel from one point to the next for a pulse is found to be completely determined by the spectral content, independent of the state of chirp. The effect of sensor orientation on arrival time is also considered. [copyright] 2001 Optical Society of America

  20. Angular Speed of a Compact Disc

    Science.gov (United States)

    Sawicki, Mikolaj ``Mik''

    2006-09-01

    A spinning motion of a compact disc in a CD player offers an interesting and challenging problem in rotational kinematics with a nonconstant angular acceleration that can be incorporated into a typical introductory physics class for engineers and scientists. It can be used either as an example presented during the lecture, emphasizing application of calculus, or as a homework assignment that could be handled easily with the help of a spreadsheet, thus eliminating the calculus aspect altogether. I tried both approaches, and the spreadsheet study was favored by my students.

  1. A proposed measurement of optical orbital and spin angular momentum and its implications for photon angular momentum

    Science.gov (United States)

    Leader, Elliot

    2018-04-01

    The expression for the total angular momentum carried by a laser optical vortex beam, splits, in the paraxial approximation, into two terms which seem to represent orbital and spin angular momentum respectively. There are, however, two very different competing versions of the formula for the spin angular momentum, one based on the use of the Poynting vector, as in classical electrodynamics, the other related to the canonical expression for the angular momentum which occurs in Quantum Electrodynamics. I analyze the possibility that a sufficiently sensitive optical measurement could decide which of these corresponds to the actual physical angular momentum carried by the beam.

  2. Orbital angular momentum of general astigmatic modes

    International Nuclear Information System (INIS)

    Visser, Jorrit; Nienhuis, Gerard

    2004-01-01

    We present an operator method to obtain complete sets of astigmatic Gaussian solutions of the paraxial wave equation. In case of general astigmatism, the astigmatic intensity and phase distribution of the fundamental mode differ in orientation. As a consequence, the fundamental mode has a nonzero orbital angular momentum, which is not due to phase singularities. Analogous to the operator method for the quantum harmonic oscillator, the corresponding astigmatic higher-order modes are obtained by repeated application of raising operators on the fundamental mode. The nature of the higher-order modes is characterized by a point on a sphere, in analogy with the representation of polarization on the Poincare sphere. The north and south poles represent astigmatic Laguerre-Gaussian modes, similar to circular polarization on the Poincare sphere, while astigmatic Hermite-Gaussian modes are associated with points on the equator, analogous to linear polarization. We discuss the propagation properties of the modes and their orbital angular momentum, which depends on the degree of astigmatism and on the location of the point on the sphere

  3. [Sensitivity of four representative angular cephalometric measures].

    Science.gov (United States)

    Xü, T; Ahn, J; Baumrind, S

    2000-05-01

    Examined the sensitivity of four representative cephalometric angles to the detection of different vectors of craniofacial growth. Landmark coordinate data from a stratified random sample of 48 adolescent subjects were used to calculate conventional values for changes between the pretreatment and end-of-treatment lateral cephalograms. By modifying the end-of-treatment coordinate values appropriately, the angular changes could be recalculated reflecting three hypothetical situations: Case 1. What if there were no downward landmark displacement between timepoints? Case 2. What if there were no forward landmark displacement between timepoints? Case 3. What if there were no Nasion change? These questions were asked for four representative cephalometric angles: SNA, ANB, NAPg and UI-SN. For Case 1, the associations (r) between the baseline and the modified measure for the three angles were very highly significant (P < 0.001) with r2 values no lower than 0.94! For Case 2, however, the associations were much weaker and no r value reached significance. These angular measurements are less sensitive for measuring downward landmark displacement than they are for measuring forward landmark displacement.

  4. Electromagnetic angular positioner based on DC micromotor

    Directory of Open Access Journals (Sweden)

    Bodnicki Maciej

    2018-01-01

    Full Text Available The presented works concerned launching of an angular positioner powered by an electromagnetic actuator, designed for performing angular micromovements within a range of few microradians. The principle of operation is based on balancing the electromagnetic torque of the motor with a torque that is twisting a compliant element. As electrodynamic actuators have no distinguished controlled positions, therefore in typical positioning systems desired positions are obtained applying a closed-loop position control. Usually, such systems employ also a feedback (dumping related to velocity of the moving elements, what simplifies forming of dynamics of the system. The design of the physical model employs a DC micromotor, whose rotor is coupled with a torsional torquemeter. A feedback signal is generated by resistive strain gauges. The paper presents a mathematical model of the positioning system, results of simulation study as well as results of experimental study. The simulation study indicates that it is possible to select such design features and such type of the micoromotor that a high dynamics of positioning is ensured.

  5. Practical scaling law for photoelectron angular distributions

    International Nuclear Information System (INIS)

    Guo Dongsheng; Zhang Jingtao; Xu Zhizhan; Li Xiaofeng; Fu Panming; Freeman, R.R.

    2003-01-01

    A practical scaling law that predicts photoelectron angular distributions (PADs) is derived using angular distribution formulas which explicitly contain spontaneous emission. The scaling law is used to analyze recent PAD measurements in above-threshold ionization, and to predict results of future experiments. Our theoretical and numerical studies show that, in the non-relativistic regime and long-wavelength approximation, the shapes of PADs are determined by only three dimensionless numbers: (1) u p ≡U p /(ℎ/2π)ω, the ponderomotive number (ponderomotive energy in units of laser photon energy); (2) ε b ≡E b /(ℎ/2π)ω, the binding number (atomic binding energy in units of the laser photon energy); (3) j, the absorbed-photon number. The scaling law is shown to be useful in predictions of results from strong-field Kapitza-Dirac effect measurements; specifically, the application of this scaling law to recently reported Kapitza-Dirac diffraction is discussed. Possible experimental tests to verify the scaling law are suggested

  6. The Cosmology Large Angular Scale Surveyor (CLASS)

    Science.gov (United States)

    Cleary, Joseph

    2018-01-01

    The Cosmology Large Angular Scale Surveyor (CLASS) is an array of four telescopes designed to measure the polarization of the Cosmic Microwave Background. CLASS aims to detect the B-mode polarization from primordial gravitational waves predicted by cosmic inflation theory, as well as the imprint left by reionization upon the CMB E-mode polarization. This will be achieved through a combination of observing strategy and state-of-the-art instrumentation. CLASS is observing 70% of the sky to characterize the CMB at large angular scales, which will measure the entire CMB power spectrum from the reionization peak to the recombination peak. The four telescopes operate at frequencies of 38, 93, 145, and 217 GHz, in order to estimate Galactic synchrotron and dust foregrounds while avoiding atmospheric absorption. CLASS employs rapid polarization modulation to overcome atmospheric and instrumental noise. Polarization sensitive cryogenic detectors with low noise levels provide CLASS the sensitivity required to constrain the tensor-to-scalar ratio down to levels of r ~ 0.01 while also measuring the optical depth the reionization to sample-variance levels. These improved constraints on the optical depth to reionization are required to pin down the mass of neutrinos from complementary cosmological data. CLASS has completed a year of observations at 38 GHz and is in the process of deploying the rest of the telescope array. This poster provides an overview and update on the CLASS science, hardware and survey operations.

  7. Inefficient Angular Momentum Transport in Accretion Disk Boundary Layers: Angular Momentum Belt in the Boundary Layer

    Science.gov (United States)

    Belyaev, Mikhail A.; Quataert, Eliot

    2018-04-01

    We present unstratified 3D MHD simulations of an accretion disk with a boundary layer (BL) that have a duration ˜1000 orbital periods at the inner radius of the accretion disk. We find the surprising result that angular momentum piles up in the boundary layer, which results in a rapidly rotating belt of accreted material at the surface of the star. The angular momentum stored in this belt increases monotonically in time, which implies that angular momentum transport mechanisms in the BL are inefficient and do not couple the accretion disk to the star. This is in spite of the fact that magnetic fields are advected into the BL from the disk and supersonic shear instabilities in the BL excite acoustic waves. In our simulations, these waves only carry a small fraction (˜10%) of the angular momentum required for steady state accretion. Using analytical theory and 2D viscous simulations in the R - ϕ plane, we derive an analytical criterion for belt formation to occur in the BL in terms of the ratio of the viscosity in the accretion disk to the viscosity in the BL. Our MHD simulations have a dimensionless viscosity (α) in the BL that is at least a factor of ˜100 smaller than that in the disk. We discuss the implications of these results for BL dynamics and emission.

  8. Características clínico epidemiológicas de pacientes con infarto miocárdico agudo

    Directory of Open Access Journals (Sweden)

    Omar Lóriga García

    2013-12-01

    Full Text Available Introducción: la cardiopatía isquémica, y entre estas el Infarto Agudo del Miocardio con elevación del segmento ST, es la primera causa de muerte a nivel mundial. Objetivo: describir las características clínico epidemiológicas de pacientes con infarto agudo del miocardio de la unidad de cuidados coronarios del Hospital General Docente Abel Santamaría Cuadrado de Pinar del Río, en 2011 y 2012. Material y Método: estudio observacional, descriptivo, retrospectivo transversal; universo 644 pacientes ingresados con elevación del ST. Los datos se tomaron de las historias clínicas. Resultados: 62% tenían entre 60- 79 años. 84.5% de los pacientes entre 30 y 49 años eran hombres. 81,6% fumaba y el 45,5% era diabético. La localización topográfica del infarto fue: inferior el 70,8%, anterior el 22,9% y anterior extensa el 6,2% de los pacientes. Como complicación, la arritmia se presentó en el 34% de los pacientes, la insuficiencia cardiaca en el 14,9% y la muerte en 7,7%. El 68,5% de los pacientes con arritmias tuvo fibrilación auricular. La trombolisis se empleó en el 55,2% de los pacientes apareciendo, entre las complicaciones, la hipotensión en el 30,7%. Conclusiones: el infarto miocárdico agudo fue más frecuente en pacientes de mayor edad, siendo antes de los 50 años cinco veces más frecuente entre los hombres. Los factores de riesgo más representados fueron el hábito de fumar y la diabetes mellitus. La localización más frecuente fue la inferior y la complicación las arritmias y dentro de estas la fibrilación auricular. La trombolisis se complica principalmente con hipotensión, pudiendo ser más empleada.

  9. Perfil etiológico del síndrome febril icterohemorrágico agudo y síndrome febril ictérico agudo en los valles del Apurímac, Quillabamba, Chanchamayo y Alto Huallaga, Perú, 1999-2000.

    Directory of Open Access Journals (Sweden)

    2003-07-01

    Full Text Available Objetivos: Conocer el perfil etiológico del síndrome febril hemorrágico agudo (SFHA y del síndrome febril ictérico agudo (SFIA en los valles del Río Apurímac (Ayacucho, Quillabamba (Cusco, Chanchamayo (Junín y Alto Huallaga (Huánuco. Materiales y métodos: Estudio longitudinal descriptivo realizado entre junio de 1999 y mayo de 2000, en 146 establecimientos de salud de los cuatro valles involucrados. Fueron incluidos pacientes que cumplieron con las definiciones de caso para la vigilancia del síndrome febril hemorrágico agudo y el síndrome febril ictérico agudo. Las muestras obtenidas se procesaron por ELISA IgM de captura para fiebre amarilla; IgM anti-HBc ELISA y HBsAg ELISA para hepatitis B; Ig anti-VHD ELISA para hepatitis D; e IgM ELISA para leptospirosis. Resultados: Fueron incluidos 63 casos: 98,4% con SFIA y 1,6% con SFHA. La letalidad fue de 16% y el tiempo entre inicio de síntomas y la obtención de la muestra de 7,2 ±5,1 días. Los casos que tuvieron confirmación diagnóstica fueron 31 (49,2%, hepatitis B (23,8%, hepatitis D (15,6%, fiebre amarilla (4,8% y leptospirosis (4,8%. Cusco tuvo el mayor porcentaje de casos confirmados por laboratorio, siendo la mayoría hepatitis B y D. Conclusiones: El estudio de la etiología de SFIA y SFHA ha permitido identificar tres brotes de fiebre amarilla en Cusco, Junín y Huánuco, y conocer la importancia de la hepatitis B, D y leptospirosis en el diagnóstico diferencial de estos síndromes. Si bien las definiciones usadas apuntan a detectar enfermedades severas, la vigilancia de ambos síndromes es complementaria y totalmente compatible con los sistemas de enfermedad específica y por el laboratorio.

  10. Untangling Galaxy Components - The Angular Momentum Parameter

    Science.gov (United States)

    Tabor, Martha; Merrifield, Michael; Aragon-Salamanca, Alfonso

    2017-06-01

    We have developed a new technique to decompose Integral Field spectral data cubes into separate bulge and disk components, allowing us to study the kinematic and stellar population properties of the individual components and how they vary with position. We present here the application of this method to a sample of fast rotator early type galaxies from the MaNGA integral field survey, and demonstrate how it can be used to explore key properties of the individual components. By extracting ages, metallicities and the angular momentum parameter lambda of the bulges and disks, we show how this method can give us new insights into the underlying structure of the galaxies and discuss what this can tell us about their evolution history.

  11. Coherent control of photoelectron wavepacket angular interferograms

    International Nuclear Information System (INIS)

    Hockett, P; Wollenhaupt, M; Baumert, T

    2015-01-01

    Coherent control over photoelectron wavepackets, via the use of polarization-shaped laser pulses, can be understood as a time and polarization-multiplexed process, where the final (time-integrated) observable coherently samples all instantaneous states of the light–matter interaction. In this work, we investigate this multiplexing via computation of the observable photoelectron angular interferograms resulting from multi-photon atomic ionization with polarization-shaped laser pulses. We consider the polarization sensitivity of both the instantaneous and cumulative continuum wavefunction; the nature of the coherent control over the resultant photoelectron interferogram is thus explored in detail. Based on this understanding, the use of coherent control with polarization-shaped pulses as a methodology for a highly multiplexed coherent quantum metrology is also investigated, and defined in terms of the information content of the observable. (paper)

  12. Coherent control of photoelectron wavepacket angular interferograms

    Science.gov (United States)

    Hockett, P.; Wollenhaupt, M.; Baumert, T.

    2015-11-01

    Coherent control over photoelectron wavepackets, via the use of polarization-shaped laser pulses, can be understood as a time and polarization-multiplexed process, where the final (time-integrated) observable coherently samples all instantaneous states of the light-matter interaction. In this work, we investigate this multiplexing via computation of the observable photoelectron angular interferograms resulting from multi-photon atomic ionization with polarization-shaped laser pulses. We consider the polarization sensitivity of both the instantaneous and cumulative continuum wavefunction; the nature of the coherent control over the resultant photoelectron interferogram is thus explored in detail. Based on this understanding, the use of coherent control with polarization-shaped pulses as a methodology for a highly multiplexed coherent quantum metrology is also investigated, and defined in terms of the information content of the observable.

  13. Angular biasing in implicit Monte-Carlo

    International Nuclear Information System (INIS)

    Zimmerman, G.B.

    1994-01-01

    Calculations of indirect drive Inertial Confinement Fusion target experiments require an integrated approach in which laser irradiation and radiation transport in the hohlraum are solved simultaneously with the symmetry, implosion and burn of the fuel capsule. The Implicit Monte Carlo method has proved to be a valuable tool for the two dimensional radiation transport within the hohlraum, but the impact of statistical noise on the symmetric implosion of the small fuel capsule is difficult to overcome. We present an angular biasing technique in which an increased number of low weight photons are directed at the imploding capsule. For typical parameters this reduces the required computer time for an integrated calculation by a factor of 10. An additional factor of 5 can also be achieved by directing even smaller weight photons at the polar regions of the capsule where small mass zones are most sensitive to statistical noise

  14. Angular filter refractometry analysis using simulated annealing.

    Science.gov (United States)

    Angland, P; Haberberger, D; Ivancic, S T; Froula, D H

    2017-10-01

    Angular filter refractometry (AFR) is a novel technique used to characterize the density profiles of laser-produced, long-scale-length plasmas [Haberberger et al., Phys. Plasmas 21, 056304 (2014)]. A new method of analysis for AFR images was developed using an annealing algorithm to iteratively converge upon a solution. A synthetic AFR image is constructed by a user-defined density profile described by eight parameters, and the algorithm systematically alters the parameters until the comparison is optimized. The optimization and statistical uncertainty calculation is based on the minimization of the χ 2 test statistic. The algorithm was successfully applied to experimental data of plasma expanding from a flat, laser-irradiated target, resulting in an average uncertainty in the density profile of 5%-20% in the region of interest.

  15. Intrinsic Orbital Angular Momentum States of Neutrons

    Science.gov (United States)

    Cappelletti, Ronald L.; Jach, Terrence; Vinson, John

    2018-03-01

    It has been shown that single-particle wave functions, of both photons and electrons, can be created with a phase vortex, i.e., an intrinsic orbital angular momentum (OAM). A recent experiment has claimed similar success using neutrons [C. W. Clark et al., Nature, 525, 504 (2015), 10.1038/nature15265]. We show that their results are insufficient to unambiguously demonstrate OAM, and they can be fully explained as phase contrast interference patterns. Furthermore, given the small transverse coherence length of the neutrons in the original experiment, the probability that any neutron was placed in an OAM state is vanishingly small. We highlight the importance of the relative size of the coherence length, which presents a unique challenge for neutron experiments compared to electron or photon work, and we suggest improvements for the creation of neutron OAM states.

  16. Nuclear scissors modes and hidden angular momenta

    Energy Technology Data Exchange (ETDEWEB)

    Balbutsev, E. B., E-mail: balbuts@theor.jinr.ru; Molodtsova, I. V. [Joint Institute for Nuclear Research (Russian Federation); Schuck, P. [Université Paris-Sud, Institut de Physique Nucléaire, IN2P3–CNRS (France)

    2017-01-15

    The coupled dynamics of low-lying modes and various giant resonances are studied with the help of the Wigner Function Moments method generalized to take into account spin degrees of freedom and pair correlations simultaneously. The method is based on Time-Dependent Hartree–Fock–Bogoliubov equations. The model of the harmonic oscillator including spin–orbit potential plus quadrupole–quadrupole and spin–spin interactions is considered. New low-lying spin-dependent modes are analyzed. Special attention is paid to the scissors modes. A new source of nuclear magnetism, connected with counter-rotation of spins up and down around the symmetry axis (hidden angular momenta), is discovered. Its inclusion into the theory allows one to improve substantially the agreement with experimental data in the description of energies and transition probabilities of scissors modes.

  17. Angular Spectrum Simulation of Pulsed Ultrasound Fields

    DEFF Research Database (Denmark)

    Du, Yigang; Jensen, Henrik; Jensen, Jørgen Arendt

    2009-01-01

    frequencies must be performed. Combining it with Field II, the generation of non-linear simulation for any geometry with any excitation array transducer becomes feasible. The purpose of this paper is to make a general pulsed simulation software using the modified ASA. Linear and phased array transducers......The optimization of non-linear ultrasound imaging should in a first step be based on simulation, as this makes parameter studies considerably easier than making transducer prototypes. Such a simulation program should be capable of simulating non-linear pulsed fields for arbitrary transducer...... geometries for any kind of focusing and apodization. The Angular Spectrum Approach (ASA) is capable of simulating monochromatic non-linear acoustic wave propagation. However, for ultrasound imaging the time response of each specific point in space is required, and a pulsed ASA simulation with multi temporal...

  18. Angular momentum of dark matter black holes

    Energy Technology Data Exchange (ETDEWEB)

    Frampton, Paul H., E-mail: paul.h.frampton@gmail.com

    2017-04-10

    We provide strongly suggestive evidence that the halo constituents of dark matter are Primordial Intermediate-Mass Black Holes (PIMBHs). PIMBHs are described by a Kerr metric with two parameters, mass M and angular momentum J. There has been little discussion of J since it plays no role in the upcoming attempt at PIMBH detection by microlensing. Nevertheless J does play a central role in understanding their previous lack of detection, especially by CMB distortion. We explain why bounds previously derived from lack of CMB distortion are too strong for PIMBHs with J non-vanishing and that, provided almost no dark matter black holes originate from stellar collapse, excessive CMB distortion is avoided.

  19. Angular reduction in multiparticle matrix elements

    International Nuclear Information System (INIS)

    Lehman, D.R.; Parke, W.C.

    1989-01-01

    A general method for reduction of coupled spherical harmonic products is presented. When the total angular coupling is zero, the reduction leads to an explicitly real expression in the scalar products of the unit vector arguments of the spherical harmonics. For nonscalar couplings, the reduction gives Cartesian tensor forms for the spherical harmonic products; tensors built from the physical vectors in the original expression. The reduction for arbitrary couplings is given in closed form, making it amenable to symbolic manipulation on a computer. The final expressions do not depend on a special choice of coordinate axes, nor do they contain azimuthal quantum number summations, or do they have complex tensor terms for couplings to a scalar; consequently, they are easily interpretable from the properties of the physical vectors they contain

  20. Angular discretization errors in transport theory

    International Nuclear Information System (INIS)

    Nelson, P.; Yu, F.

    1992-01-01

    Elements of the information-based complexity theory are computed for several types of information and associated algorithms for angular approximations in the setting of a on-dimensional model problem. For point-evaluation information, the local and global radii of information are computed, a (trivial) optimal algorithm is determined, and the local and global error of a discrete ordinates algorithm are shown to be infinite. For average cone-integral information, the local and global radii of information are computed, the local and global error tends to zero as the underlying partition is indefinitely refined. A central algorithm for such information and an optimal partition (of given cardinality) are described. It is further shown that the analytic first-collision source method has zero error (for the purely absorbing model problem). Implications of the restricted problem domains suitable for the various types of information are discussed

  1. Topological photonic orbital-angular-momentum switch

    Science.gov (United States)

    Luo, Xi-Wang; Zhang, Chuanwei; Guo, Guang-Can; Zhou, Zheng-Wei

    2018-04-01

    The large number of available orbital-angular-momentum (OAM) states of photons provides a unique resource for many important applications in quantum information and optical communications. However, conventional OAM switching devices usually rely on precise parameter control and are limited by slow switching rate and low efficiency. Here we propose a robust, fast, and efficient photonic OAM switch device based on a topological process, where photons are adiabatically pumped to a target OAM state on demand. Such topological OAM pumping can be realized through manipulating photons in a few degenerate main cavities and involves only a limited number of optical elements. A large change of OAM at ˜10q can be realized with only q degenerate main cavities and at most 5 q pumping cycles. The topological photonic OAM switch may become a powerful device for broad applications in many different fields and motivate a topological design of conventional optical devices.

  2. Angular response of hot wire probes

    International Nuclear Information System (INIS)

    Di Mare, L; Jelly, T O; Day, I J

    2017-01-01

    A new equation for the convective heat loss from the sensor of a hot-wire probe is derived which accounts for both the potential and the viscous parts of the flow past the prongs. The convective heat loss from the sensor is related to the far-field velocity by an expression containing a term representing the potential flow around the prongs, and a term representing their viscous effect. This latter term is absent in the response equations available in the literature but is essential in representing some features of the observed response of miniature hot-wire probes. The response equation contains only four parameters but it can reproduce, with great accuracy, the behaviour of commonly used single-wire probes. The response equation simplifies the calibration the angular response of rotated slanted hot-wire probes: only standard King’s law parameters and a Reynolds-dependent drag coefficient need to be determined. (paper)

  3. Hematoma subdural agudo traumático: estudo de 110 pacientes Acute traumatic subdural haematomas: study of 110 cases

    Directory of Open Access Journals (Sweden)

    Nicandro de Figueiredo Neto

    1996-06-01

    Full Text Available Apresentamos uma série consecutiva de 110 pacientes com hematoma subdural agudo traumático (HSDA admitidos no serviço de emergência do HBDF no período de 1°-janeiro a 1°-dezembro-1994. Todos os pacientes foram atendidos de acordo com o mesmo protocolo. Houve predominância do sexo masculino (79%, com idade variando entre 14 e 70 anos, sendo os atropelamentos (34% e os acidentes automobilísticos (20% as causas mais comuns. A maioria dos pacientes (85,7% foi admitida muito grave, com 8 pontos ou menos na Escala de Coma Glasgow (ECG, o que influenciou diretamente na mortalidade. A tomografia computadorizada de crânio foi o exame diagnóstico de escolha que mostrou serem as contusões e o inchaço cerebral ("swelling" as lesões intracranianas associadas mais freqüentes. A cirurgia foi realizada em 45,1% dos pacientes, e, em sua maioria, através de craniotomia fronto-têmporo-parietal ampla, com drenagem do hematoma, seguida de plástica da dura-mater. Em 54,9% as condições clínicas não permitiram a realização da cirurgia; neste grupo, cerca de 69,6% estavam em coma profundo à admissão, com 3 pontos na ECG. A letalidade cirúrgica foi de 61,2% e esteve diretamente relacionada à condição clínica inicial e à idade do paciente. A letalidade, incluindo todos os pacientes cirúrgicos e não cirúrgicos com HSDA, mesmo aqueles admitidos já com sinais de falência de tronco cerebral, foi de 79,5%. Além destes pacientes que faleceram, cerca de 7% evoluíram sem seqüelas ou com seqüelas mínimas; outros 11,4% com seqüelas de moderadas a paves e 2,1 % permaneceram em estado vegetativo persistente. Nossos dados estão de acordo com os da literatura no que se refere a elevada taxa de morbidade e mortalidade dos pacientes com HSDA.We report a series of 110 patients with acute traumatic subdural hematoma (ASDH admitted at HBDF emergency within 1994 (January Is1 to December PJ.All patients were treated according to the same protocol

  4. Años de vida perdidos por infarto agudo de miocardio en la Argentina entre 1991 y 2005

    Directory of Open Access Journals (Sweden)

    Fernando Botto

    2008-01-01

    Full Text Available IntroducciónLos años potenciales de vida perdidos (APVP son uno de los indicadores utilizados para determinar las muertes tempranas. A diferencia de las tasas de mortalidad, crudas y ajustadas por edad, este indicador, que cuantifica los años que teóricamente una persona deja de vivir si la muerte se presenta en forma prematura (o sea antes de cumplir su esperanza de vida, da una visión más amplia de la importancia relativa que tienen las causas más relevantes de mortalidad prematura, por lo que su uso se justifica en la planificación y en la definición de prioridades en salud.ObjetivosDescribir la evolución de la mortalidad por infarto agudo de miocardio (IAM en términos de tasas de mortalidad (TM y de años potenciales de vida perdidos (APVP para el período 1991-2005, identificar diferencias en relación con el sexo y comparar la media de APVP por muerto (MAPVP entre los registros SAC y los de la Dirección de Estadística e Información de Salud del Ministerio de Salud y Acción Social (DEIS.Material y métodosLas defunciones por IAM, distribuidas por edad y sexo, se obtuvieron de la DEIS y de los registros SAC. Los APVP se calcularon según la fórmula de Romeder y Mc Whinnie y también sobre la base de la esperanza de vida al nacer, además de la MAPVP con su intervalo de confianza del 95%.ResultadosLa TM por IAM según la DEIS descendió de 50 en 1991 a 38 por 100.000 habitantes en 2005 (pendiente [slope] -3,7; p < 0,001. La tasa de APVP disminuyó de 516 a 314 años por 100.000 en igual período. A nivel nacional, la MAPVP fue de 11,3 (11,1-11,5, 11,4 (11,2- 11,6, 11,5 (11,3-11,7, 11,1 (10,8-11,3 para 1991, 1996, 2000 y 2005, respectivamente (pendiente 0,0. Se observaron resultados similares a los de la SAC -10,8 (8,22-13,5, 10,4 (6,86- 14,0, 7,50 (4,67-10,3, 14,0 (10,3-17,7- para los años mencionados (pendiente +0,67. En relación con el sexo tampoco hubo diferencias, excepto para el caso de las mujeres en el año 2000 (p

  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. Uso de alteplase no tratamento do acidente vascular encefálico isquêmico agudo: o que sabem os enfermeiros?

    Directory of Open Access Journals (Sweden)

    Samia Jardelle Costa de Freitas Maniva

    2012-06-01

    Full Text Available O estudo objetivou analisar o conhecimento de enfermeiros acerca do uso de alteplase no tratamento do acidente vascular encefálico (AVE isquêmico agudo. Estudo descritivo-exploratório realizado em uma unidade de AVE de um hospital público localizado na cidade de Fortaleza-CE, durante o mês de outubro de 2010. Participaram do estudo dez enfermeiros, com idade média de 25 anos. Os benefícios da medicação foram apresentados em justaposição com as limitações do uso. Estratégias para ampliar a utilização de alteplase foram apontadas pelos enfermeiros. O conhecimento da realidade investigada contribui na construção do saber de enfermagem e pode auxiliar o enfermeiro que presta assistência direta ao paciente que se submete a este tratamento.

  7. Edema agudo hemorrágico da infância: relato de três casos Acute hemorrhagic edema of infancy: report of three cases

    OpenAIRE

    Paulo Sergio Emerich; Patricia Almeida Prebianchi; Luciene Lage da Motta; Elton Almeida Lucas; Leonardo Mello Ferreira

    2011-01-01

    O Edema Agudo Hemorrágico da Infância é uma vasculite leucocitoclástica pouco frequente, que ocorre, quase exclusivamente, em crianças entre 4 meses e 2 anos de idade. Caracteriza-se, clinicamente, pela tríade febre, lesões purpúricas na face, pavilhões auriculares e extremidades e edema. Embora os achados cutâneos sejam dramáticos e de surgimento rápido, o prognóstico é favorável, com resolução espontânea dentro de 1 a 3 semanas. Descrevem-se três casos cujos achados clínicos e histopatológi...

  8. CARACTERIZACIÓN DEL SÍNDROME CORONARIO AGUDO SIN ELEVACIÓN DEL ST EN EL CENTRO DIAGNÓSTICO INTEGRAL

    Directory of Open Access Journals (Sweden)

    Rider Piñeiro López

    2012-03-01

    Full Text Available Resumen Introducción y objetivos: El síndrome coronario agudo presenta una elevada incidencia en el cuadro de morbilidad y mortalidad de los países del mundo desarrollado. El objetivo de esta investigación fue determinar la morbilidad por síndrome coronario agudo y su relación con algunas variables. Método: Se realizó un estudio epidemiológico, observacional, descriptivo, en 30 pacientes con el diagnóstico de síndrome coronario agudo sin elevación del ST, atendidos en la Unidad de Terapia Intensiva del Centro Diagnóstico Integral “José Gregorio Hernández”, municipio Ortiz, estado Guárico, República Bolivariana de Venezuela; en el período del 1 de enero al 31 de diciembre de 2007. Resultados: La angina inestable fue la enfermedad más frecuente (80,0 % en estos pacientes. Predominaron los mayores de 49 años (80 %, del sexo femenino (63,3 %, color negro de piel, procedencia urbana y escolaridad secundaria. El tabaquismo constituyó el factor de riesgo más frecuente (56,6 %, seguido de hipertensión arterial (43,3 % y obesidad (26,6 %. Las arritmias y el fallo de bomba fueron frecuentes en pacientes con infarto; el dolor precordial mantenido, en enfermos con angina inestable. Hubo un fallecido por infarto agudo de miocardio, con más de sesenta años y menos de tres días de estadía. Conclusiones: Predominó la angina inestable, y los factores de riesgo más frecuentemente asociados, fueron la hipertensión arterial y el hábito de fumar. Abstract Introduction and objectives: Acute coronary syndrome has a high impact on morbidity and mortality rates of the developed world. The objective of this research was to determine the morbidity for acute coronary syndrome and its relation to some variables. Method: An epidemiological, observational, descriptive study was performed in 30 patients with the diagnosis of acute coronary syndrome without ST elevation, treated at the Intensive Care Unit of the Integral Diagnostic Center "Jos

  9. Infarto agudo del miocardio en los centros diagnósticos integrales de Vargas, Venezuela Myocardial acute infarction in integral diagnosis centers of Vargas, Venezuela

    Directory of Open Access Journals (Sweden)

    Ana Rosa Jorna Calixto

    2010-12-01

    Full Text Available INTRODUCCIÓN: el infarto agudo del miocardio constituyó más del 12 % de los fallecimientos por cardiopatía isquémica en Venezuela en 2006, sin evidenciarse disminución en la mortalidad a pesar del mejoramiento tecnológico de los servicios de urgencias. OBJETIVO: caracterizar su comportamiento en los centros de diagnóstico integrales del Estado de Vargas, en el período comprendido de junio de 2006 a junio de 2009. MÉTODOS: se realizó un estudio descriptivo, retrospectivo para caracterizar el comportamiento del infarto agudo del miocardio en los servicios de urgencia y emergencia de los centros de diagnóstico integrales utilizando las estadísticas de la Misión Barrio Adentro. RESULTADOS: fueron atendidos 186 pacientes por infarto agudo del miocardio, predominaron los ingresos en la terapia intensiva (2,4 % sobre los servicios de hospitalización. Los fallecidos por esta causa fueron 35 personas, 17,1 % del total de fallecidos. Fueron trombolizados el 39,2 %, con el mayor número alcanzado en el 2008 con 51,2 %. La letalidad por infarto agudo del miocardio osciló entre tasas de 17,3 y 20 por cada 100 pacientes vistos. La tasa de mortalidad bruta fue de 9,58 x 100 000 habitantes. CONCLUSIONES: el número de casos atendidos por infarto tuvo un comportamiento ascendente de manera estable, representaron el 0,7 % del total de ingresos en estos centros, con predominio de los ingresos en la terapia intensiva sobre los servicios de hospitalización. Se le aplicó el tratamiento trombolítico con estreptoquinasa recombinante a un por ciento importante de enfermos. En los servicios de hospitalización fue superior la letalidad por esta causa. No disminuyó el riesgo de morir para los pacientes con esta enfermedad y la mortalidad general en el período estudiado fue de 35 pacientes para una tasa de 9,58 × 100 000 habitantes.INTRODUCTION: the acute myocardial infarction was over the 12 % of deceased from ischemic heart disease in Venezuela in

  10. Neumonía eosinofílica: presentación de dos casos, agudo y crónico

    Directory of Open Access Journals (Sweden)

    Oscar Pamo Reyna

    2007-01-01

    Full Text Available Se presenta dos casos de neumonía eosinofílica idiopática, uno crónico y otro agudo. En el caso clínico 1 se realizó una confirmación anatomopatológica de neumonía eosinofílica idiopática y en el caso clínico 2 se tuvo una neumonia eosinofílica aguda probable. Ambos presentaron tos, fiebre y disnea. El estudio radiográfico reveló lesiones alveolares bilaterales con tendencia a la consolidación. La marcada eosinofilia en sangre periférica fue un dato resaltante que facilitó el diagnóstico. Ambos casos tuvieron muy buena respuesta a la corticoterapia.(Rev Med Hered 2007;18:39-44.

  11. Correlación clínica, laparoscópica e histológica en el abdomen agudo

    Directory of Open Access Journals (Sweden)

    María Elena Trujillo Toledo

    1995-12-01

    Full Text Available Se presentan 132 pacientes con diagnóstico clínico de abdomen agudo durante 1991 a 1993, a quienes se les realizó laparoscopia de urgencia. Las afecciones más frecuentes en que se realizó laparoscopia fueron: apendicitis aguda y las enfermedades ginecológicas. La efectividad de la laparoscopia en relación con el resultado histológico fue del 97,1 %, y no coincidió en 3 pacientes con diagnóstico laparoscópico de apendicitis aguda, hematosalpinx derecho y peritonitis pélvica, sin especificar factor causal. En el 19,6 % la conclusión laparoscópica evitó una intervención quirúrgica

  12. Angular Position Tracking Control of a Quadcopter

    Directory of Open Access Journals (Sweden)

    T. V. Glazkov

    2017-01-01

    Full Text Available The paper dwells on tracking the quad-copter angular position with desired quality parameters of transient processes. The aerial vehicle is considered as a rigid body with six degrees of freedom.  A full rigid body quad-copter mathematical model is considered without the assumption of smallness of the Euler angles.Among the most well known methods of non-linear stabilization are feedback linearization and backstepping. The backstepping approach allows us to have an effective solution of the stabilization problems with uncertainties available in the system. However, in synthesis of the feedback through backstepping, there is still an urgent issue: how to ensure desirable quality of transients in the closed-loop system. The paper presents a solution of this problem using as an example the tracking a given (programmed change of the angular position of a quad-copter.The control algorithms obtained in this paper are implemented using the Rolling Spider MATLAB Toolbox (ROSMAT tool package on the Parrot Rolling Spider quad-copter. A numerical simulation and experiments have shown the efficiency of obtained control laws, with the transient processes taking into account the desired quality indicators. However, the experiments showed that lack of terms in the mathematical model to describe the aerodynamic effects, resulted in the instability of the quad-copter flight near the obstacle (the effect of the reflected airflow.Further research can be aimed at solving the control problem in question using a mathematical model of the quad-copter motion that takes into account various aerodynamic effects.One of the potential application areas for the theoretical results, obtained in the paper, is to solve the problems of automatic control of unmanned aerial vehicles.

  13. Supramolecular architectures constructed using angular bipyridyl ligands

    International Nuclear Information System (INIS)

    Barnett, Sarah Ann

    2003-01-01

    This work details the synthesis and characterization of a series of coordination frameworks that are formed using bidentate angular N-donor ligands. Pyrimidine was reacted with metal(ll) nitrate salts. Reactions using Cd(NO 3 ) 2 receive particular focus and the analogous reactions using the linear ligand, pyrazine, were studied for comparison. In all cases, two-dimensional coordination networks were prepared. Structural diversity is observed for the Cd(ll) centres including metal-nitrate bridging. In contrast, first row transition metal nitrates form isostructural one-dimensional chains with only the bridging N-donor ligands generating polymeric propagation. The angular ligand, 2,4-bis(4-pyridyl)-1,3,5-triazine (dpt), was reacted with Cd(NO 3 ) 2 and Zn(NO 3 ) 2 . Whereas Zn(NO 3 ) 2 compounds exhibit solvent mediated polymorphism, a range of structures were obtained for the reactions with Cd(NO 3 ) 2 , including the first example of a doubly parallel interpenetrated 4.8 2 net. 4,7-phenanthroline, was reacted with various metal(ll) nitrates as well as cobalt(ll) and copper(ll) halides. The ability of 4,7-phenanthroline to act as both a N-donor ligand and a hydrogen bond acceptor has been discussed. Reactions of CuSCN with pyrimidine yield an unusual three-dimensional structure in which polymeric propagation is not a result of ligand bridging. The reaction of CuSCN with dpt yielded structural supramolecular isomers. (author)

  14. Angular momentum of circularly polarized light in dielectric media

    OpenAIRE

    Mansuripur, Masud

    2014-01-01

    A circularly polarized plane-wave is known to have no angular momentum when examined through Maxwell's equations. This, however, contradicts the experimentally observed facts, where finite segments of plane waves are known to be capable of imparting angular momentum to birefringent platelets. Using a superposition of four plane-waves propagating at slightly different angles to a common direction, we derive an expression for the angular momentum density of a single plane-wave in the limit when...

  15. Abdome agudo em pós-operatório tardio de apendicite aguda: pode não ser bridas

    Directory of Open Access Journals (Sweden)

    Bruno Castro Fernandes

    2014-10-01

    Full Text Available As ressecções intestinais em países desenvolvidos ocorrem devido às malformações congênitas. Em países em desenvolvimento essas resseções ocorrem por causas potencialmente evitáveis, como invaginação intestinal irredutível, trauma abdominal fechado, volvo de jejuno-íleo, enterocolite necrosante, hérnia inguinal estrangulada e obstrução por bridas pós-operatórias. O volvo intestinal na infância é raro e geralmente de causas iatrogênicas causado, por exemplo, pela presença de grampos soltos a cavidade intestinal após apendicectomia laparoscópica. O volvo de jejuno-íleo pode ser secundário à isquemia nos casos de gastrosquise tratadas com silo ou mesmo pela colocação de banda gástrica pós-laparoscopia, ou ainda pela presença de lipoma mesentérico. Não foi identificado trabalho na literatura recente sobre volvo jejuno-íleo e isquemia e necrose de segmento de alça intestinal. O autores relatam um caso de abdome agudo obstrutivo em criança de 6 anos, em pós-operatório tardio (4 anos de apendicectomia aberta e cuja ressecção de segmento de Alça intestinal foi necessária nas duas oportunidades mas por motivos diferentes. Situações adversas em abdome agudo pós-operatório podem não ser por aderências intestinais, mas por situações mais graves e o cirurgião deve estar preparado para corrigir sua tática operatória.

  16. Etiología del síndrome febril agudo en la provincia de Jaén, Perú 2004-2005

    Directory of Open Access Journals (Sweden)

    Lucinda Troyes R

    2006-01-01

    Full Text Available Objetivo: Conocer a tiología el Síndrome febril agudo en nacientes que acudieron a tres establecimientos de salud de la provincia de Jaén entre mayo de 2004 y abril de 2005. Materiales y métodos: Estudio descriptivo prospectivo realizado en tres establecimientos de salud: Hospital General de Jaén, Hospital de Apoyo Bellavista y Centro de Salud Morro Solar. Se incluyeron pacientes entre 5 y 65 años con fiebre de menos de ocho días de evolución y sin foco infeccioso aparente. Inicialmente se les realizó gota gruesa para malaria y frotis sanguíneo para Bartonelosis; de los casos negativos se obtuvo una segunda muestra de sangre para la búsqueda de ELISA IgM y microaglutinación para el diagnóstico de leptospirosis, ELISA IgM para dengue, Mayaro, Oropuche y encefalitis equina venezolana, e inmunofluorescencia indirecta para Rickettsiosis. Resultados: De 1039 febriles incluidos, se determinó la etiología en 680 (65,4%casos, malaria por P.falciparum 312 (30,0%, leptospirosis 115 (11,1%, dengue 105 (10,1%, malaria por P. vivax 76 (7,3%,leptospirosis más dengue 30 (2,9%, Rickettsiosis 15 (1,4%,Bartonelosis 17 (1,6%,leptospirosis más Rickettsiosis 7 (0,7%, y leptospirosis, dengue más Rickettsiosis 3 (0,3%. Los serovares de Leptospira más frecuentes fueron varilla (35,7%y bratislava (32,5%. Conclusión: La malaria es la principal causa de síndrome febril agudo en Jaén, se destaca la presencia de la leptospirosis como segunda causa,por delante del dengue; es necesario considerar dentro del diagnóstico diferencial Rickettsiosis y Bartonelosis.

  17. Orbital angular momentum exchange in post-collision interaction

    International Nuclear Information System (INIS)

    van der Burgt, P.J.M.; van Eck, J.; Heideman, H.G.M.

    1985-01-01

    The authors study the exchange of orbital angular mementum between the scattered and the ejected electron. The angular distribution of electrons ejected by the He (2s 2 ) 2 S autoionizing state after its excitation via the He (2s2p 2 ) 2 D resonance is measured. Taking into accout interference with electrons from the direct ionization of helium, the authors are able to show that the measured anisotropic angular distribution is the result of an orbital angular momentum exchange during the post-collision interaction

  18. A proposed measurement of optical orbital and spin angular momentum and its implications for photon angular momentum

    Directory of Open Access Journals (Sweden)

    Elliot Leader

    2018-04-01

    Full Text Available The expression for the total angular momentum carried by a laser optical vortex beam, splits, in the paraxial approximation, into two terms which seem to represent orbital and spin angular momentum respectively. There are, however, two very different competing versions of the formula for the spin angular momentum, one based on the use of the Poynting vector, as in classical electrodynamics, the other related to the canonical expression for the angular momentum which occurs in Quantum Electrodynamics. I analyze the possibility that a sufficiently sensitive optical measurement could decide which of these corresponds to the actual physical angular momentum carried by the beam. Keywords: Photon, Angular momentum, Laser optics, Particle physics

  19. Whole-body angular momentum during stair ascent and descent.

    Science.gov (United States)

    Silverman, Anne K; Neptune, Richard R; Sinitski, Emily H; Wilken, Jason M

    2014-04-01

    The generation of whole-body angular momentum is essential in many locomotor tasks and must be regulated in order to maintain dynamic balance. However, angular momentum has not been investigated during stair walking, which is an activity that presents a biomechanical challenge for balance-impaired populations. We investigated three-dimensional whole-body angular momentum during stair ascent and descent and compared it to level walking. Three-dimensional body-segment kinematic and ground reaction force (GRF) data were collected from 30 healthy subjects. Angular momentum was calculated using a 13-segment whole-body model. GRFs, external moment arms and net joint moments were used to interpret the angular momentum results. The range of frontal plane angular momentum was greater for stair ascent relative to level walking. In the transverse and sagittal planes, the range of angular momentum was smaller in stair ascent and descent relative to level walking. Significant differences were also found in the ground reaction forces, external moment arms and net joint moments. The sagittal plane angular momentum results suggest that individuals alter angular momentum to effectively counteract potential trips during stair ascent, and reduce the range of angular momentum to avoid falling forward during stair descent. Further, significant differences in joint moments suggest potential neuromuscular mechanisms that account for the differences in angular momentum between walking conditions. These results provide a baseline for comparison to impaired populations that have difficulty maintaining dynamic balance, particularly during stair ascent and descent. Copyright © 2014 Elsevier B.V. All rights reserved.

  20. Learning web development with Bootstrap and AngularJS

    CERN Document Server

    Radford, Stephen

    2015-01-01

    Whether you know a little about Bootstrap or AngularJS, or you're a complete beginner, this book will enhance your capabilities in both frameworks and you'll build a fully functional web app. A working knowledge of HTML, CSS, and JavaScript is required to fully get to grips with Bootstrap and AngularJS.

  1. Schmidt decomposition for non-collinear biphoton angular wave functions

    International Nuclear Information System (INIS)

    Fedorov, M V

    2015-01-01

    Schmidt modes of non-collinear biphoton angular wave functions are found analytically. The experimentally realizable procedure for their separation is described. Parameters of the Schmidt decomposition are used to evaluate the degree of the biphoton's angular entanglement. (paper)

  2. Isotropic gates in large gamma detector arrays versus angular distributions

    International Nuclear Information System (INIS)

    Iacob, V.E.; Duchene, G.

    1997-01-01

    The quality of the angular distribution information extracted from high-fold gamma-gamma coincidence events is analyzed. It is shown that a correct quasi-isotropic gate setting, available at the modern large gamma-ray detector arrays, essentially preserves the quality of the angular information. (orig.)

  3. Measuring Average Angular Velocity with a Smartphone Magnetic Field Sensor

    Science.gov (United States)

    Pili, Unofre; Violanda, Renante

    2018-01-01

    The angular velocity of a spinning object is, by standard, measured using a device called a tachometer. However, by directly using it in a classroom setting, the activity is likely to appear as less instructive and less engaging. Indeed, some alternative classroom-suitable methods for measuring angular velocity have been presented. In this paper,…

  4. Angular momentum dependence of the distribution of shell model eigenenergies

    International Nuclear Information System (INIS)

    Yen, M.K.

    1974-01-01

    In the conventional shell model calculation the many-particle energy matrices are constructed and diagonalized for definite angular momentum and parity. However the resulting set of eigenvalues possess a near normal behavior and hence a simple statistical description is possible. Usually one needs only about four parameters to capture the average level densities if the size of the set is not too small. The parameters are essentially moments of the distribution. But the difficulty lies in the yet unsolved problem of calculating moments in the fixed angular momentum subspace. We have derived a formula to approximate the angular momentum projection dependence of any operator averaged in a shell model basis. This approximate formula which is a truncated series in Hermite polynomials has been proved very good numerically and justified analytically for large systems. Applying this formula to seven physical cases we have found that the fixed angular momentum projection energy centroid, width and higher central moments can be obtained accurately provided for even-even nuclei the even and odd angular momentum projections are treated separately. Using this information one can construct the energy distribution for fixed angular momentum projection assuming normal behavior. Then the fixed angular momentum level densities are deduced and spectra are extracted. Results are in reasonably good agreement with the exact values although not as good as those obtained using exact fixed angular momentum moments. (Diss. Abstr. Int., B)

  5. Rotational speedups accompanying angular deceleration of a superfluid

    International Nuclear Information System (INIS)

    Campbell, L.J.

    1979-01-01

    Exact calculations of the angular deceleration of superfluid vortex arrays show momentary speedups in the angular velocity caused by coherent, multiple vortex loss at the boundary. The existence and shape of the speedups depend on the vortex friction, the deceleration rate, and the pattern symmetry. The phenomenon resembles, in several ways, that observed in pulsars

  6. Angular correlations near the Fermi energy

    International Nuclear Information System (INIS)

    Fox, D.; Cebra, D.A.; Karn, J.

    1988-01-01

    Angular correlations between light particles have been studied to probe the extent to which a thermally equilibrated system is formed in heavy ion collisions near the Fermi energy. Single-light-particle inclusive energy spectra and two-particle large-angle correlations were measured for 40 and 50 MeV/nucleon C+C, Ag, and Au. The single-particle inclusive energy spectra are well fit by a three moving source parametrization. Two-particle large-angle correlations are shown to be consistent with emission from a thermally equilibrated source when the effects of momentum conservation are considered. Single-particle inclusive spectra and light-particle correlations at small relative momentum were measured for 35 MeV/nucleon N+Ag. Source radii were extracted from the two-particle correlation functions and were found to be consistent with previous measurements using two-particle correlations and the coalescence model. The temperature of the emitting source was extracted from the relative populations of states using the quantum statistical model and was found to be 4.8/sub -2.4//sup +2.8/ MeV, compared to the 14 MeV temperature extracted from the slopes of the kinetic energy spectra

  7. A new CMOS Hall angular position sensor

    Energy Technology Data Exchange (ETDEWEB)

    Popovic, R.S.; Drljaca, P. [Swiss Federal Inst. of Tech., Lausanne (Switzerland); Schott, C.; Racz, R. [SENTRON AG, Zug (Switzerland)

    2001-06-01

    The new angular position sensor consists of a combination of a permanent magnet attached to a shaft and of a two-axis magnetic sensor. The permanent magnet produces a magnetic field parallel with the magnetic sensor plane. As the shaft rotates, the magnetic field also rotates. The magnetic sensor is an integrated combination of a CMOS Hall integrated circuit and a thin ferromagnetic disk. The CMOS part of the system contains two or more conventional Hall devices positioned under the periphery of the disk. The ferromagnetic disk converts locally a magnetic field parallel with the chip surface into a field perpendicular to the chip surface. Therefore, a conventional Hall element can detect an external magnetic field parallel with the chip surface. As the direction of the external magnetic field rotates in the chip plane, the output voltage of the Hall element varies as the cosine of the rotation angle. By placing the Hall elements at the appropriate places under the disk periphery, we may obtain the cosine signals shifted by 90 , 120 , or by any other angle. (orig.)

  8. Nuclear structure at high angular momentum

    International Nuclear Information System (INIS)

    Stephens, F.S.

    1976-08-01

    There is considerable interest in high angular-momentum states of nuclei, and some recent progress in three areas is discussed. Part I considers transitional nuclei, where two types of rotational bands--decoupled and strongly coupled--are found to occur very frequently. These can be described by several collective models, but the required potential-energy surfaces seem to differ somewhat from those calculated microscopically. In Part II the processes that might cause backbending (irregularities in the rotational levels of certain nuclei) are discussed, and alignment of individual nucleons now seems to be the cause in most cases. The mixing of the ground band with this aligned band can be studied in some detail using Coulomb excitation with very heavy ions. Part III deals with the very high-spin states where effective moments of inertia have been obtained for spins up to 50h. Also structure has been seen in the spectra around these spin values which can be tentatively related to calculated shell effects. 74 references, 61 figures

  9. CLASS: The Cosmology Large Angular Scale Surveyor

    Science.gov (United States)

    Essinger-Hileman, Thomas; Ali, Aamir; Amiri, Mandana; Appel, John W.; Araujo, Derek; Bennett, Charles L.; Boone, Fletcher; Chan, Manwei; Cho, Hsiao-Mei; Chuss, David T.; hide

    2014-01-01

    The Cosmology Large Angular Scale Surveyor (CLASS) is an experiment to measure the signature of a gravitational wave background from inflation in the polarization of the cosmic microwave background (CMB). CLASS is a multi-frequency array of four telescopes operating from a high-altitude site in the Atacama Desert in Chile. CLASS will survey 70% of the sky in four frequency bands centered at 38, 93, 148, and 217 GHz, which are chosen to straddle the Galactic-foreground minimum while avoiding strong atmospheric emission lines. This broad frequency coverage ensures that CLASS can distinguish Galactic emission from the CMB. The sky fraction of the CLASS survey will allow the full shape of the primordial B-mode power spectrum to be characterized, including the signal from reionization at low-length. Its unique combination of large sky coverage, control of systematic errors, and high sensitivity will allow CLASS to measure or place upper limits on the tensor-to-scalar ratio at a level of r = 0:01 and make a cosmic-variance-limited measurement of the optical depth to the surface of last scattering, tau. (c) (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

  10. Angular velocity and centripetal acceleration relationship

    Science.gov (United States)

    Monteiro, Martín; Cabeza, Cecilia; Marti, Arturo C.; Vogt, Patrik; Kuhn, Jochen

    2014-05-01

    During the last few years, the growing boom of smartphones has given rise to a considerable number of applications exploiting the functionality of the sensors incorporated in these devices. A sector that has unexpectedly taken advantage of the power of these tools is physics teaching, as reflected in several recent papers. In effect, the use of smartphones has been proposed in several physics experiments spanning mechanics, electromagnetism, optics, oscillations, and waves, among other subjects. Although mechanical experiments have received considerable attention, most of them are based on the use of the accelerometer. An aspect that has received less attention is the use of rotation sensors or gyroscopes. An additional advance in the use of these devices is given by the possibility of obtaining data using the accelerometer and the gyroscope simultaneously. The aim of this paper is to consider the relation between the centripetal acceleration and the angular velocity. Instead of using a formal laboratory setup, in this experiment a smartphone is attached to the floor of a merry-go-round, found in many playgrounds. Several experiments were performed with the roundabout rotating in both directions and with the smart-phone at different distances from the center. The coherence of the measurements is shown.

  11. Angular-momentum effects in subbarrier fusion

    International Nuclear Information System (INIS)

    Halbert, M.L.; Beene, J.R.

    1993-01-01

    It has been known since about 1980 that fusion of heavy ions is greatly enhanced below the Coulomb barrier compared with normal barrier-penetration expectations. The excitation function for fusion of 64 Ni + 100 Mo measured in collaboration with a group at Washington University shows the effect clearly. The barrier energy is about 142 MeV; the lowest point is at about 90% of the barrier energy. The dotted curve is the prediction of a one-dimensional-barrier-penetration calculation of a type that reproduces the fusion of light projectiles very well. Several theoretical approaches have been successful in explaining the enhancement seen in much of the excitation-function data, but it cannot be said that a full understanding of the physics is in hand even after more than a decade of hard work. In fact, the reasonable success of several rather different models shows that the underlying phenomena are not well understood. Other types of data might be helpful in distinguishing among the many different theoretical approaches. An important kind of information not measured in most of the experiments is the dependence on ell, the angular momentum of the fusing system. We obtained such information on the cross sections, σ ell, as a function of ell for the fusion of 64 Ni and 100 Mo using the Spin Spectrometer. This paper will first review the experimental method and data and then present results from a more sophisticated analysis of the same data

  12. Cyclic transformation of orbital angular momentum modes

    International Nuclear Information System (INIS)

    Schlederer, Florian; Krenn, Mario; Fickler, Robert; Malik, Mehul; Zeilinger, Anton

    2016-01-01

    The spatial modes of photons are one realization of a QuDit, a quantum system that is described in a D-dimensional Hilbert space. In order to perform quantum information tasks with QuDits, a general class of D-dimensional unitary transformations is needed. Among these, cyclic transformations are an important special case required in many high-dimensional quantum communication protocols. In this paper, we experimentally demonstrate a cyclic transformation in the high-dimensional space of photonic orbital angular momentum (OAM). Using simple linear optical components, we show a successful four-fold cyclic transformation of OAM modes. Interestingly, our experimental setup was found by a computer algorithm. In addition to the four-cyclic transformation, the algorithm also found extensions to higher-dimensional cycles in a hybrid space of OAM and polarization. Besides being useful for quantum cryptography with QuDits, cyclic transformations are key for the experimental production of high-dimensional maximally entangled Bell-states. (paper)

  13. Angular momentum transport by tidal acoustic wave

    International Nuclear Information System (INIS)

    Sakurai, T.

    1976-01-01

    An analytical expression of the braking torque on a Jacobian ellipsoid rotating steadily in an enviromental gas is given, based on the assumption that the ellipsoid rotates around its shortest principal axis with an angular momentum slightly larger than that at the bifurcation point of the Maclaurin spheroid. This braking torque is effected by the gravitational interaction between the ellipsoid matter and a spiral density configuration in the environmental gas. This spiral configuration which is called a tidal acoustic wave, is caused by the zone of silence effect in a supersonic flow. With respect to a coordinates system rotating with the ellipsoid, a supersonic region appears outside a certain radius. In this supersonic region, the effect of the non-axisymmetric fluctuation in the ellipsoid potential propagates along the downstream branches of the Mach waves. This one-sided response of the supersonic part causes the tidal acoustic wave. The discussion is restricted to the equatorial plane, and an acoustic approximation of the basic equations is used under the assumption that the self-gravity effect of the environmental gas is negligable in comparison to the main gravity of the ellipsoid. The results are applied to the pre- and post-Main sequence phases of a rotating star, and relating astrophysical problems are discussed. (Auth.)

  14. Angular momentum transport by tidal acoustic wave

    Energy Technology Data Exchange (ETDEWEB)

    Sakurai, T [Kyoto Univ. (Japan). Faculty of Engineering

    1976-05-01

    An analytical expression of the braking torque on a Jacobian ellipsoid rotating steadily in an enviromental gas is given, based on the assumption that the ellipsoid rotates around its shortest principal axis with an angular momentum slightly larger than that at the bifurcation point of the Maclaurin spheroid. This braking torque is effected by the gravitational interaction between the ellipsoid matter and a spiral density configuration in the environmental gas. This spiral configuration which is called a tidal acoustic wave, is caused by the zone of silence effect in a supersonic flow. With respect to a coordinates system rotating with the ellipsoid, a supersonic region appears outside a certain radius. In this supersonic region, the effect of the non-axisymmetric fluctuation in the ellipsoid potential propagates along the downstream branches of the Mach waves. This one-sided response of the supersonic part causes the tidal acoustic wave. The discussion is restricted to the equatorial plane, and an acoustic approximation of the basic equations is used under the assumption that the self-gravity effect of the environmental gas is negligable in comparison to the main gravity of the ellipsoid. The results are applied to the pre- and post-Main sequence phases of a rotating star, and relating astrophysical problems are discussed.

  15. Angular distributions of sputtered particles from NiTi alloy

    International Nuclear Information System (INIS)

    Neshev, I.; Hamishkeev, V.; Chernysh, V.S.; Postnikov, S.; Mamaev, B.

    1993-01-01

    The angular distributions of sputtered Ni and Ti from a polycrystalline NiTi (50-50%) alloy are investigated by Auger electron spectroscopy and Rutherford backscattering spectroscopy. A difference in the angular distributions is observed with Ni being sputtered preferentially near the surface normal. A computer program for the calculation of the angular distributions of constituents sputtered from binary targets is created and used. The mechanisms responsible for the observed differences in the angular distributions are discussed. It is found that the collisional cascade theory is not directly applicable to the results of the constituents' angular distributions obtained in the presence of oxygen. The fitted coefficients of bombardment-induced segregation are found to be greater than the experimentally obtained ones. (author)

  16. Jet angularity measurements for single inclusive jet production

    Science.gov (United States)

    Kang, Zhong-Bo; Lee, Kyle; Ringer, Felix

    2018-04-01

    We study jet angularity measurements for single-inclusive jet production at the LHC. Jet angularities depend on a continuous parameter a allowing for a smooth interpolation between different traditional jet shape observables. We establish a factorization theorem within Soft Collinear Effective Theory (SCET) where we consistently take into account in- and out-of-jet radiation by making use of semi-inclusive jet functions. For comparison, we elaborate on the differences to jet angularities measured on an exclusive jet sample. All the necessary ingredients for the resummation at next-to-leading logarithmic (NLL) accuracy are presented within the effective field theory framework. We expect semiinclusive jet angularity measurements to be feasible at the LHC and we present theoretical predictions for the relevant kinematic range. In addition, we investigate the potential impact of jet angularities for quark-gluon discrimination.

  17. Photon beam polarization and non-dipolar angular distributions

    International Nuclear Information System (INIS)

    Peshkin, M.

    1996-01-01

    Angular distributions of ejecta from unoriented atoms and molecules depend upon the polarization state of the incident x-rays as well as upon the dynamics of the physical systems being studied. I recommend a simple geometrical way of looking at the polarization and its effects upon angular distributions. The polarization is represented as a vector in a parameter space that faithfully represents the polarization of the beam. The simple dependence of the angular dependence of the angular distributions on the polarization vector enables easy extraction of the dynamical information contained in those angular distributions. No new physical results emerge from this geometrical approach, but known consequences of the symmetries appear in an easily visualized form that I find pleasing and that has proved to be useful for planning experiments and for analyzing data

  18. Eficacia anestésica y duración analgésica de la bupivacaína al 0.25% + morfina vs bupivacaína al 0.25% en bloqueo del plexo braquial para cirugía de miembro superior en pacientes del Hospital Vicente Corral Moscoso, Cuenca 2014

    OpenAIRE

    Espinoza Bernal, Flora Judith

    2016-01-01

    Introducción: La cirugía de miembro superior es un reto para el anestesiólogo por que amerita el dominio de técnicas de anestesia regional y manejo de complicaciones y analgesia en las primeras 48 horas. Objetivo: Comparar la eficacia anestésica entre bupivacaína al 0.25% + morfina y bupivacaína al 0.25% en bloqueo del plexo braquial para cirugía de miembro superior en el H.V.C.M, Cuenca 2014. Metodología: se diseñó un estudio clínico aleatorio simple ciego, para valorar el efecto de la...

  19. Controvérsias acerca da acidose hipercápnica na síndrome do desconforto respiratório agudo Controversies involving hypercapnic acidosis in acute respiratory distress syndrome

    Directory of Open Access Journals (Sweden)

    Liliane Nardelli

    2009-12-01

    Full Text Available A síndrome do desconforto respiratório agudo é caracterizada por uma reação inflamatória difusa do parênquima pulmonar induzida por um insulto direto ao epitélio alveolar (síndrome do desconforto respiratório agudo pulmonar ou indireto por meio do endotélio vascular (síndrome do desconforto respiratório agudo extrapulmonar. A principal estratégia terapêutica da síndrome do desconforto respiratório agudo é o suporte ventilatório. Entretanto, a ventilação mecânica pode agravar a lesão pulmonar. Nesse contexto, uma estratégia ventilatória protetora com baixo volume corrente foi proposta. Tal estratégia reduziu a taxa de mortalidade dos pacientes com síndrome do desconforto respiratório agudo, porém acarretou acidose hipercápnica. O presente artigo apresenta uma revisão da literatura acerca dos efeitos da acidose hipercápnica na síndrome do desconforto respiratório agudo. Para tal, realizou-se uma revisão sistemática da literatura científica conforme critérios já estabelecidos para análise documental incluindo artigos experimentais e clínicos sobre o tema, usando-se como bases de dados MedLine, LILACS, SciElo, PubMed, Cochrane. A acidose hipercápnica é defendida por alguns autores como moduladora do processo inflamatório da síndrome do desconforto respiratório agudo. Entretanto, estudos clínicos e experimentais acerca dos efeitos da acidose hipercápnica têm demonstrado resultados controversos. Logo, é fundamental a realização de mais pesquisas para elucidar o papel da acidose hipercápnica na síndrome do desconforto respiratório agudo.Acute respiratory distress syndrome is characterized by a diffuse inflammatory reaction of lung parenchyma induced by a direct insult to the alveolar epithelium (pulmonary acute respiratory distress syndrome or an indirect lesion through the vascular endothelium (extrapulmonary acute respiratory distress syndrome. The main therapeutic strategy for acute respiratory

  20. Bloqueio do plexo braquial pela via posterior com uso de neuroestimulador e ropivacaína a 0,5% Bloqueo del plexo braquial por la vía posterior con el uso de neuroestimulador y ropivacaína a 0,5% Posterior brachial plexus block with nerve stimulator and 0.5% ropivacaine

    Directory of Open Access Journals (Sweden)

    Lúcia Beato

    2005-08-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Existem várias maneiras de abordar o plexo braquial dependendo da experiência do anestesiologista e da região a ser operada. O bloqueio do plexo braquial pela via posterior pode representar uma alternativa para cirurgias de ombro, clavícula e úmero proximal. O objetivo deste estudo foi mostrar os resultados observados em pacientes submetidos a bloqueio do plexo braquial pela via posterior com uso de neuroestimulador e ropivacaína a 0,5%. MÉTODO: Vinte e dois pacientes com idade entre 17 e 76 anos, estado físico ASA I e II, submetidos a cirurgias ortopédicas envolvendo o ombro, clavícula e úmero proximal foram anestesiados com bloqueio de plexo braquial pela via posterior utilizando neuroestimulador a partir de 1 mA. Obtida a contração desejada, a corrente foi diminuída para 0,5 mA e, permanecendo a resposta contrátil, foram injetados 40 mL de ropivacaína a 0,5%. Foram avaliados os seguintes parâmetros: latência, analgesia, duração da cirurgia, duração da analgesia e do bloqueio motor, complicações e efeitos colaterais. RESULTADOS: O bloqueio foi efetivo em 20 dos 22 pacientes; a latência média foi de 15,52 min; a duração média da cirurgia foi de 1,61 hora. A média de duração da analgesia foi de 15,85 horas e do bloqueio motor 11,16 horas. Não foram observados sinais e sintomas clínicos de toxicidade do anestésico local e nenhum paciente apresentou efeitos adversos do bloqueio. CONCLUSÕES: Nas condições deste estudo o bloqueio de plexo braquial pela via posterior com o uso do neuroestimulador e ropivacaína a 0,5% demonstrou ser uma técnica efetiva, confortável para o paciente e de fácil realização.JUSTIFICATIVA Y OBJETIVOS: Existen varios modos de abordar el plexo braquial dependiendo de la experiencia del anestesiologista y de la región que será operada. El bloqueo del plexo braquial por la vía posterior puede representar una alternativa para cirugías de hombro, clav

  1. La inmunización con productos de excreción-secreción de Trichinella spiralis unido al bloqueo de CTLA-4 produce un elevado grado de protección ante un reto con el parásito

    Directory of Open Access Journals (Sweden)

    José Lino Zumaquero-Ríos

    2017-04-01

    Full Text Available En la búsqueda de una vacuna experimental efectiva contra Trichinella spiralis se han utilizado diferentes estrategias, pero el grado de protección alcanzado en la casi totalidad de los ensayos es insuficiente para lograr un adecuado control de la enfermedad. En la literatura hay evidencias de que moléculas inhibidoras de la activación de los linfocitos T están implicadas en la regulación de la respuesta inmune contra los helmintos. El bloqueo de estas moléculas puede ser un blanco potencial para el tratamiento de las infecciones causadas por estos parásitos. Por otra parte, se ha informado que la inmunización con productos de excreción-secreción de larvas musculares de T. spiralis proporciona una inmunidad protectora parcial. La infección con el parásito induce una elevada población de linfocitos T reguladores que modulan la respuesta inmune. En este trabajo encontramos que la inmunización con antígenos de excreción-secreción de larvas musculares, más el bloqueo de la molécula inhibidora CTLA-4 en los linfocitos T, causa una significativa reducción de las larvas del parásito en un modelo experimental murino. De esta forma, queda demostrado que la eliminación del efecto supresor inducido por el helminto da por resultado una respuesta Th2 protectora más potente.

  2. Evaluación económica del stent medicado vs. convencional para pacientes con infarto agudo de miocardio con elevación del ST en Colombia

    Directory of Open Access Journals (Sweden)

    Mateo Ceballos

    2014-11-01

    Conclusiones: El stent medicado con sirolimus no es costo-efectivo para pacientes con infarto agudo de miocardio con elevación del ST en Colombia. Se recomienda mayor investigación futura sobre la probabilidad de muerte y trombosis muy tardía del stent, así como en subgrupos específicos de pacientes y stents medicados de segunda generación.

  3. Demoras en la realización de la angioplastia primaria en los pacientes trasladados con infarto agudo de miocardio: un problema médico-asistencial

    Directory of Open Access Journals (Sweden)

    Rodrigo Blanco

    2009-01-01

    Full Text Available IntroducciónEn el infarto agudo de miocardio (IAM está comprobado que cuanto más tempranamente se realice la reperfusión, mejores serán sus resultados a corto y a largo plazos, por lo que el tiempo entre el inicio de los síntomas y la reperfusión coronaria es un elemento de gran importancia en la estrategia de su tratamiento. Este lapso se encuentra conformado por dos períodos: “tiempo paciente” y “tiempo médico-asistencial”. En la angioplastia primaria, el análisis de estos tiempos y sus intervalos es el paso obligado para lograr una reducción de la demora a la reperfusión.ObjetivosAnalizar los tiempos en cada etapa del proceso traslado-realización de una angioplastia, ya sea primaria o de rescate, en pacientes con infarto agudo de miocardio con elevación del segmento ST (IAMEST que debieron ser trasladados desde un hospital derivador a un centro de referencia en el ámbito de la ciudad de Buenos Aires para someterse al procedimiento, como primer paso para un programa de optimización de los tiempos.Material y métodosEstudio prospectivo, observacional, de pacientes derivados al Hospital General de Agudos “Dr. Cosme Argerich” con diagnóstico de IAMEST e indicación de ATC. Se analizaron los tiempos parciales desde el inicio de los síntomas hasta la reperfusión coronaria, para lo cual se consideró “tiempo paciente” desde el inicio de los síntomas hasta la llegada al hospital derivador y “tiempo médico-asistencial” al comprendido entre la llegada al hospital derivador y la insuflación del balón.ResultadosSe incluyeron 313 pacientes, 225 (72% con angioplastia primaria (ATCP y 88 (28% con angioplastia de rescate (ATCR. Las medianas (cuartiles de tiempo en ATCP fueron: tiempo paciente: 90’ (40-240, llegada al hospital derivador-llamada al Equipo de Hemodinamia Cardiovascular de Urgencia (EHCU: 80’ (35-150, llamada EHCU-ingreso hemodinamia: 75’ (55-100, ingreso hemodinamia-balón: 35’ (23-52, tiempo m

  4. Control of Angular Intervals for Angle-Multiplexed Holographic Memory

    Science.gov (United States)

    Kinoshita, Nobuhiro; Muroi, Tetsuhiko; Ishii, Norihiko; Kamijo, Koji; Shimidzu, Naoki

    2009-03-01

    In angle-multiplexed holographic memory, the full width at half maximum of the Bragg selectivity curves is dependent on the angle formed between the medium and incident laser beams. This indicates the possibility of high density and high multiplexing number by varying the angular intervals between adjacent holograms. We propose an angular interval scheduling for closely stacking holograms into medium even when the angle range is limited. We obtained bit error rates of the order of 10-4 under the following conditions: medium thickness of 1 mm, laser beam wavelength of 532 nm, and angular multiplexing number of 300.

  5. Angular absorption of iridium - ICW12 needles: practical considerations

    International Nuclear Information System (INIS)

    Szymczyk, W.; Lesiak, J.

    1984-01-01

    An analysis was made of two potential sources of error in Ir 192 dosimetry: the effect of angular absorption and the differences in the ionization constants found in literature. Corrections for selfabsorption in the ICW12 iridium source were determined from measurements and calculations. It was found that the decrease in the dose caused by the angular absorption in the central therapeutic area of a typical implantation can exceed 5 percent. The need for employing the concept of ''constant exposure rate'' is stressed as well as that for using angular absorption in the form of absorption. 13 refs., 6 figs., 1 tab. (author)

  6. Nuclear spin measurement using the angular correlation method

    International Nuclear Information System (INIS)

    Schapira, J.-P.

    The double angular correlation method is defined by a semi-classical approach (Biendenharn). The equivalence formula in quantum mechanics are discussed for coherent and incoherent angular momentum mixing; the correlations are described from the density and efficiency matrices (Fano). The ambiguities in double angular correlations can be sometimes suppressed (emission of particles with a high orbital momentum l), using triple correlations between levels with well defined spin and parity. Triple correlations are applied to the case where the direction of linear polarization of γ-rays is detected [fr

  7. Measurement crankshaft angular speed of an OM403 engine

    Directory of Open Access Journals (Sweden)

    Biočanin Stojko

    2017-01-01

    Full Text Available In this paper, the methodology of the measurement of the angular speed of the crankshaft of a ten-cylinder diesel OM403 engine is presented, with regular and irregular engine operation. The angular velocity was measured under laboratory conditions, on already installed measuring equipment from the laboratory and on the break of a well known brand-Schenck, by using an optoelectronic incremental rotary encoder, a data acquisition module and the LabVIEW software for synchronization and management of the measuring equipment. The goal of this paper is to give a practical contribution to researches of measuring of crankshaft angular speed of the crankshaft engine OM 403.

  8. On Angular Sampling Methods for 3-D Spatial Channel Models

    DEFF Research Database (Denmark)

    Fan, Wei; Jämsä, Tommi; Nielsen, Jesper Ødum

    2015-01-01

    This paper discusses generating three dimensional (3D) spatial channel models with emphasis on the angular sampling methods. Three angular sampling methods, i.e. modified uniform power sampling, modified uniform angular sampling, and random pairing methods are proposed and investigated in detail....... The random pairing method, which uses only twenty sinusoids in the ray-based model for generating the channels, presents good results if the spatial channel cluster is with a small elevation angle spread. For spatial clusters with large elevation angle spreads, however, the random pairing method would fail...... and the other two methods should be considered....

  9. Notes on the quantum theory of angular momentum

    CERN Document Server

    Feenberg, Eugene

    1999-01-01

    This classic, concise text has served a generation of physicists as an exceptionally useful guide to the mysteries of angular momenta and Clebsch-Gordon Coefficients. Derived from notes originally prepared to assist graduate students in reading research papers on atomic, molecular, and nuclear structure, the text first reviews the basic elements of quantum theory. It then examines the development of the fundamental commutation relations for angular momentum components and vector operators, and the ways in which matrix elements and eigenvalues of the angular momentum operators are worked out f

  10. Implementación y resultados de un nuevo programa de ECMO para trasplante de pulmón y distrés respiratorio agudo

    Directory of Open Access Journals (Sweden)

    Eduardo San Roman

    2015-06-01

    Full Text Available RESUMEN Objetivo: El desarrollo de la membrana de oxigenación extracorpórea en América Latina representa un desafío para la especialidad. El objetivo de este artículo fue describir los resultados de un nuevo programa de membrana de oxigenación extracorpórea en una unidad de cuidados intensivos. Métodos: Estudio de cohorte retrospectivo. Incluye 22 pacientes que requirieron membrana de oxigenación extracorpórea desde Enero de 2011 hasta Junio de 2014. Se evaluaron características basales, indicaciones, duración de la corrida, días de ventilación mecánica, días de unidad de cuidados intensivos, complicaciones y mortalidad hospitalaria. Resultados: Quince pacientes requirieron membrana de oxigenación extracorpórea post-trasplante pulmonar y 7 pacientes por distrés respiratorio agudo. Todos los pacientes trasplantados fueron destetados de membrana de oxigenación extracorpórea, con una duración mediana de 3 días (Rango intercuantil - IQR: 2 - 5, de ventilación mecánica 15,5 días (IQR: 3 - 35, de estadía unidad de cuidados intensivos 31,5 días (IQR: 19 - 53 y de estadía hospitalaria 60 días (IQR: 36 - 89, con una mortalidad de 20%. Los pacientes con distrés respiratorio agudo tuvieron una mediana de duración de membrana de oxigenación extracorpórea de 9 días (IQR: 3 - 14, mediana de ventilación mecánica 25 días (IQR: 13 - 37, de estadía en terapia 31 días (IQR: 11 - 38, y hospitalaria 32 días (IQR: 11 - 41, y 57% de mortalidad. Las principales complicaciones fueron infecciones (80%, insuficiencia renal aguda (43%, sangrados en sitio quirúrgico y de inserción de cánulas (22%, plaquetopenia (60% y coagulopatía (30%. Conclusión: A pesar de encontrarnos transitando una curva de aprendizaje, consideramos la experiencia satisfactoria, con resultados y complicaciones comparables a las reportadas en la literatura.

  11. Hiperglucemia en el síndrome coronario agudo: informe científico multidisciplinario Hyperglycemia in acute coronary syndrome: multidisciplinary scientific report

    Directory of Open Access Journals (Sweden)

    Patricia Blanco

    2012-04-01

    Full Text Available La hiperglucemia con o sin diabetes preexistente es un hallazgo frecuente en pacientes que cursan un síndrome coronario agudo. Estudios previos han demostrado que la hiperglucemia es altamente prevalente y se asocia a un mayor riesgo de muerte y complicaciones hospitalarias. Los mecanismos fisiopatológicos mediante los cuales la hiperglucemia provoca resultados adversos no son claros, y se desconoce si es un marcador de eventos o su causa. Los efectos perjudiciales de la hiperglucemia en el sistema cardiovascular son múltiples, y el control de los niveles de glucosa con insulina parece mejorar el pronóstico en estos pacientes. Se han desarrollado numerosos protocolos para el control de glucemia que demostraron ser seguros y efectivos. En una iniciativa originada en el Consejo de Emergencias de la Sociedad Argentina de Cardiología, se convocó a expertos de nuestro medio con el propósito de debatir estrategias para el control de la glucemia en pacientes que cursan un síndrome coronario agudo. Este documento refleja lo discutido en este evento académico con la intención de resumir los principales aspectos del control de la glucemia y ofrecer recomendaciones generales de tratamiento en la Unidad Coronaria.Hyperglycemia with or without pre-existing diabetes mellitus, occurs frequently in the setting of acute coronary syndrome. Previous studies have demonstrated that hyperglycemia is highly prevalent and is associated with an increased risk of hospital complications and death. The underlying pathophysiology related an adverse clinical outcome to hyperglycemia is unclear, and it is uncertain whether increased serum glucose is simply a marker of adverse outcomes or their cause. Detrimental effects of hyperglycemia on the cardiovascular system are multiple. Glycemia control with insulin would prevent adverse outcomes. Numerous glucose-control protocols have been developed and tested proving to be safe and effective. In an initiative from the

  12. Efecto diurético agudo de los extractos etanólico y acuoso de Ceratopteris pteridoides (Hook en ratas normales

    Directory of Open Access Journals (Sweden)

    Antistio Aníbal Alviz

    2013-03-01

    Full Text Available Introducción. Ceratopteris pteridoides es un helecho semiacuático de la familia Parkeriacea, ampliamente utilizado en la medicina popular colombiana como diurético y colelitiásico, sobre el cual no existen reportes científicos que avalen su uso popular como diurético. Objetivo. Evaluar el efecto diurético agudo en dosis única y dosis repetidas a corto plazo, de los extractos etanólico y acuoso de C. pteridoides en un modelo in vivo. Materiales y métodos. El extracto etanólico total fue obtenido por maceración de la planta entera de C. pteridoides con etanol y el extracto acuoso fue obtenido por decocción a 60 °C por 15 minutos. Ambos extractos se sometieron a análisis fitoquímico preliminar y estudio histológico posterior a la administración de los extractos durante ocho días consecutivos (1.000 mg/kg. El efecto diurético se evaluó en ratas Wistar, tratadas con los extractos (500 mg/kg, en forma aguda y en dosis repetidas a corto plazo, cuantificando la eliminación de agua y la excreción renal de sodio y potasio por espectrofotometría de absorción atómica y, de cloruros, por titulación mercurimétrica. Resultados. En el modelo agudo, ambos extractos mostraron un significativo efecto diurético y de excreción renal de sodio y potasio en comparación con el control, mientras que con la administración en dosis repetidas a corto plazo mostraron efecto diurético sin eliminación de electrolitos. El estudio histopatológico no sugirió efectos tóxicos hepáticos o renales. Conclusión. Los resultados demuestran la actividad diurética de C. pteridoides y sustentan el uso popular dado a esta planta como diurético en la costa norte colombiana. Se requieren estudios posteriores que permitan aislar e identificar los compuestos responsables de la actividad y los mecanismos de acción involucrados.   doi: http://dx.doi.org/10.7705/biomedica.v33i1.611

  13. The angular momentum dependence of complex fragment emission

    International Nuclear Information System (INIS)

    Sobtka, L.G.; Sarantites, D.G.; Li, Z.

    1987-01-01

    Large fragment (A > 4) production at high angular momentum is studied via the reaction, 200 MeV 45 Sc + 65 Cu. Comparisons of the fragment yields from this reaction (high angular momentum) to those from 93 Nb + Be (low angular momentum) are used to verify the strong angular momentum dependence of large fragment production predicted by equilibrium models. Details of the coincident γ-ray distributions not only confirm a rigidly rotating intermediate but also indicate that the widths of the primary L-wave distributions decrease with increasing symmetry in the decay channel. These data are used to test the asymmetry and L-wave dependence of emission barriers calculated from a rotating, finite range corrected, liquid drop model. 21 refs., 10 figs

  14. Manifest rotation symmetric expressions for angular momentum eigenfunctions

    International Nuclear Information System (INIS)

    Eeg, J.O.; Wroldsen, J.

    1983-01-01

    Manifest rotation symmetric expressions for eigenfunctions for spin s, orbital angular momentum l and total angular momentum j = l+s, .... , /l-s/ in terms of (2j+1) x (2s+1) multipole transition matrices (MTM) is given. These matrices, which are irreducible tensor matrices, have an algebra together with ordinary spin matrices for spin s and spin j. Explicit expressions for MTM's and their algebra are given for angular momenta <-3. By means of some examples it is shown that within this formalism angular integrations in central field problems will be simplified considerably. Thus the formalism turns out to be very useful for instance for calculations within the MIT-bag and also within spin-spin interactions in atomic physics. (Auth.)

  15. The INCAS Project: An Innovative Contact-Less Angular Sensor

    Science.gov (United States)

    Ghislanzoni, L.; Di Cintio, A.; Solimando, M.; Parzianello, G.

    2013-09-01

    Angular Positions sensors are widely used in all spacecrafts, including re-entry vehicles and launchers, where mechanisms and pointing-scanning devices are required. The main applications are on mechanisms for TeleMeasure (TM) related to the release and deployment of devices, or on rotary mechanisms such as Solar Array Drive Mechanism (SADM) and Antenna Pointing Mechanism (APM). Longer lifetime (up to 7- 10 years) is becoming a new driver for the coming missions and contact technology sensors often incur in limitations due to the wear of the contacting parts [1].A Self-Compensating Absolute Angular Encoder was developed and tested in the frame of an ESA's ARTES 5.2 project, named INCAS (INnovative Contact-less Angular Sensor). More in particular, the INCAS sensor addresses a market need for contactless angular sensors aimed at replacing the more conventional rotary potentiometers, while featuring the same level of accuracy performances and extending the expected lifetime.

  16. Electronic orbital angular momentum and magnetism of graphene

    Energy Technology Data Exchange (ETDEWEB)

    Luo, Ji, E-mail: ji.luo@upr.edu

    2014-10-01

    Orbital angular momentum (OAM) of graphene electrons in a perpendicular magnetic field is calculated and corresponding magnetic moment is used to investigate the magnetism of perfect graphene. Variation in magnetization demonstrates its decrease with carrier-doping, plateaus in a large field, and de Haas–van Alphen oscillation. Regulation of graphene's magnetism by a parallel electric field is presented. The OAM originates from atomic-scale electronic motion in graphene lattice, and vector hopping interaction between carbon atomic orbitals is the building element. A comparison between OAM of graphene electrons, OAM of Dirac fermions, and total angular momentum of the latter demonstrates their different roles in graphene's magnetism. Applicability and relation to experiments of the results are discussed. - Highlights: • Orbital angular momentum of graphene electrons is calculated. • Orbital magnetic moment of graphene electrons is obtained. • Variation in magnetization of graphene is calculated. • Roles of different kinds of angular momentum are investigated.

  17. Efficient evaluation of angular power spectra and bispectra

    Science.gov (United States)

    Assassi, Valentin; Simonović, Marko; Zaldarriaga, Matias

    2017-11-01

    Angular statistics of cosmological observables are hard to compute. The main difficulty is due to the presence of highly-oscillatory Bessel functions which need to be integrated over. In this paper, we provide a simple and fast method to compute the angular power spectrum and bispectrum of any observable. The method is based on using an FFTlog algorithm to decompose the momentum-space statistics onto a basis of power-law functions. For each power law, the integrals over Bessel functions have a simple analytical solution. This allows us to efficiently evaluate these integrals, independently of the value of the multipole l. In particular, this method significantly speeds up the evaluation of the angular bispectrum compared to existing methods. To illustrate our algorithm, we compute the galaxy, lensing and CMB temperature angular power spectrum and bispectrum.

  18. Phase-space distributions and orbital angular momentum

    Directory of Open Access Journals (Sweden)

    Pasquini B.

    2014-06-01

    Full Text Available We review the concept of Wigner distributions to describe the phase-space distributions of quarks in the nucleon, emphasizing the information encoded in these functions about the quark orbital angular momentum.

  19. Helicons in uniform fields. II. Poynting vector and angular momenta

    Science.gov (United States)

    Stenzel, R. L.; Urrutia, J. M.

    2018-03-01

    The orbital and spin angular momenta of helicon modes have been determined quantitatively from laboratory experiments. The current density is obtained unambiguously from three dimensional magnetic field measurements. The only approximation made is to obtain the electric field from Hall Ohm's law which is usually the case for low frequency whistler modes. This allows the evaluation of the Poynting vector from which the angular momentum is obtained. Comparing two helicon modes (m = 0 and m = 1), one can separate the contribution of angular momentum of a rotating and non-rotating wave field. The orbital angular momentum is important to assess the wave-particle interaction by the transverse Doppler shift of rotating waves which has not been considered so far.

  20. Genetic characterization of angular leaf spot resistance in selected ...

    African Journals Online (AJOL)

    Mr Tryphone

    2015-10-28

    Oct 28, 2015 ... Angular leaf spot disease (ALS) caused by Pseudocercospora griseola is one ... Author(s) agree that this article remains permanently open access under the terms ... that results in shrivelled seeds of reduced size and quality.

  1. prevalence of angular leaf spot disease and sources of resistance

    African Journals Online (AJOL)

    USER

    2017-02-17

    Feb 17, 2017 ... Angular leaf spot (Pseudocercospora griseola Crous U, Brown) is one of the ..... Incidence of six foliar bean diseases in two agro ecological zones of eastern Democratic Republic of .... use of poor quality farmer-saved seed.

  2. Angular distributions of ions channeled in the Si crystals

    International Nuclear Information System (INIS)

    Petrovic, S.; Korica, S.; Kokkoris, M.; Neskovic, N.

    2002-01-01

    In this study we analyze the angular distributions of Ne 10+ ions channeled in the Si crystals. The ion energy is 60 MeV and the crystal thickness is varied from 286 to 3435 nm. This thickness range corresponds to the reduced crystal thickness range from 0.5 to 6, i.e. from the second to the twelfth rainbow cycle. The angular distributions were obtained via the numerical solution of the ion equations of motion and the computer simulation method. The analysis shows that the angular distribution has a periodic behavior. We also analyze the transmission patterns corresponding to the angular distributions. These patterns should be compared to the experimental patterns obtainable by a two-dimensional position sensitive detector. We demonstrate that, when the ion beam divergence is sufficiently large, i.e. much larger than the critical angle for channeling, the channeling star effect occurs in the transmission patterns

  3. Angular Momentum Transport in Quasi-Keplerian Accretion Disks ...

    Indian Academy of Sciences (India)

    R. Narasimhan (Krishtel eMaging) 1461 1996 Oct 15 13:05:22

    Keplerian accretion disk yield results that are inconsistent with the generally accepted model. If correct, the ideas proposed by Hayashi &. Matsuda would radically alter our understanding of the nature of the angular momentum transport in the disk, ...

  4. The mass and angular momentum of reconstructed metric perturbations

    Science.gov (United States)

    van de Meent, Maarten

    2017-06-01

    We prove a key result regarding the mass and angular momentum content of linear vacuum perturbations of the Kerr metric obtained through the formalism developed by Chrzarnowski, Cohen, and Kegeles (CCK). More precisely, we prove that the Abbott-Deser mass and angular momentum integrals of any such perturbation vanish when that perturbation was obtained from a regular Fourier mode of the Hertz potential. As a corollary we obtain a generalization of previous results on the completion of the ‘no string’ radiation gauge metric perturbation generated by a point particle. We find that for any bound orbit around a Kerr black hole, the mass and angular momentum perturbations completing the CCK metric are simply the energy and angular momentum of the particle ‘outside’ the orbit and vanish ‘inside’ the orbit.

  5. Design and Implementation of a Digital Angular Rate Sensor

    Directory of Open Access Journals (Sweden)

    Zhen Peng

    2010-10-01

    Full Text Available With the aim of detecting the attitude of a rotating carrier, the paper presents a novel, digital angular rate sensor. The sensor consists of micro-sensing elements (gyroscope and accelerometer, signal processing circuit and micro-processor (DSP2812. The sensor has the feature of detecting three angular rates of a rotating carrier at the same time. The key techniques of the sensor, including sensing construction, sensing principles, and signal processing circuit design are presented. The test results show that the sensor can sense rolling, pitch and yaw angular rate at the same time and the measurement error of yaw (or pitch angular rate and rolling rate of the rotating carrier is less than 0.5%.

  6. Large-uncertainty intelligent states for angular momentum and angle

    International Nuclear Information System (INIS)

    Goette, Joerg B; Zambrini, Roberta; Franke-Arnold, Sonja; Barnett, Stephen M

    2005-01-01

    The equality in the uncertainty principle for linear momentum and position is obtained for states which also minimize the uncertainty product. However, in the uncertainty relation for angular momentum and angular position both sides of the inequality are state dependent and therefore the intelligent states, which satisfy the equality, do not necessarily give a minimum for the uncertainty product. In this paper, we highlight the difference between intelligent states and minimum uncertainty states by investigating a class of intelligent states which obey the equality in the angular uncertainty relation while having an arbitrarily large uncertainty product. To develop an understanding for the uncertainties of angle and angular momentum for the large-uncertainty intelligent states we compare exact solutions with analytical approximations in two limiting cases

  7. Edema agudo pulmonar associado à obstrução das vias aéreas: relato de caso Edema agudo pulmonar asociado a la obstrucción de las vías aéreas: relato de caso Acute pulmonary edema associated with obstruction of the airways: case report

    Directory of Open Access Journals (Sweden)

    Flora Margarida Barra Bisinotto

    2008-04-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O edema pulmonar por pressão negativa tem sido definido como edema não-cardiogênico, com transudação de líquido para o interstício pulmonar, por aumento na pressão negativa intratorácica, ocasionado pela obstrução das vias aéreas superiores. Descreveu-se o caso de paciente hígida, submetida à anestesia geral, que apresentou edema agudo pulmonar após a extubação traqueal. RELATO DO CASO: Paciente de 23 anos, sexo feminino, estado físico ASA II, submetida à anestesia geral para videolaparoscopia ginecológica. O procedimento durou 3 horas, sem intercorrências. Após a extubação, a paciente apresentou laringoespasmo e diminuição da saturação de oxigênio. Houve melhora após colocação de cânula oral e administração de oxigênio, sob pressão positiva, com máscara facial. Estabilizado o quadro, foi encaminhada à sala de recuperação pós-anestésica, onde, logo após a admissão, apresentou edema agudo de pulmão com eliminação de secreção serossanguinolenta. O tratamento constou de elevação do dorso, oxigênio sob máscara, furosemida e restrição hídrica. A radiografia torácica mostrou imagem compatível com edema agudo pulmonar e área cardíaca normal. O eletrocardiograma (ECG, ecocardiografia e enzimas cardíacas estavam normais. A paciente apresentou boa evolução, recebendo alta hospitalar no dia seguinte, assintomática. CONCLUSÕES: O edema agudo de pulmão associado à obstrução das vias aéreas superiores é condição clínica que pode agravar procedimentos cirúrgicos de baixa morbidade e que aparece sobretudo em pacientes jovens. O tratamento deve ser instituído precocemente, pois a resolução também é rápida e, na maioria das vezes, sem seqüelas.JUSTIFICATIVA Y OBJETIVOS: El edema pulmonar por presión negativa ha sido definido como edema no cardiogénico, con transudación de líquido para el intersticio pulmonar, por aumento en la presión negativa

  8. The Effects of Isokinetic Strength Training on Strength at Different Angular Velocities: a Pilot Study

    Directory of Open Access Journals (Sweden)

    Tuğba Kocahan

    2017-09-01

    Conclusion: It was shown that angular velocity is important in isokinetic training, and that training at high angular velocities provides strength increases at lower angular velocities, but would not increase strength at angular velocities above the training level. For this reason, it is thought that in the preparation of an isokinetic strength training protocol, angular velocities need to be taken into account. For any athlete, the force at the angular velocity required in her/his sports branch needs to be considered.

  9. A Very Fast and Angular Momentum Conserving Tree Code

    International Nuclear Information System (INIS)

    Marcello, Dominic C.

    2017-01-01

    There are many methods used to compute the classical gravitational field in astrophysical simulation codes. With the exception of the typically impractical method of direct computation, none ensure conservation of angular momentum to machine precision. Under uniform time-stepping, the Cartesian fast multipole method of Dehnen (also known as the very fast tree code) conserves linear momentum to machine precision. We show that it is possible to modify this method in a way that conserves both angular and linear momenta.

  10. Existence of black holes due to concentration of angular momentum

    Energy Technology Data Exchange (ETDEWEB)

    Khuri, Marcus A. [Department of Mathematics, Stony Brook University,Stony Brook, NY 11794 (United States)

    2015-06-29

    We present a general sufficient condition for the formation of black holes due to concentration of angular momentum. This is expressed in the form of a universal inequality, relating the size and angular momentum of bodies, and is proven in the context of axisymmetric initial data sets for the Einstein equations which satisfy an appropriate energy condition. A brief comparison is also made with more traditional black hole existence criteria based on concentration of mass.

  11. Gamma-gamma angular correlation measurement in the 100 Ru

    International Nuclear Information System (INIS)

    Kenchian, G.

    1990-01-01

    An angular correlation automatic spectrometer with two Ge(Li) detectors has been developed. The spectrometer moves automatically, controlled by a microcomputer. The gamma-gamma directional angular correlations of coincidence transitions have been measured in 100 Ru nuclide, following the β + and electron capture of 100 Rh. The 100 Rh source has been produced with 100 Ru(p,n) 100 Rh reaction, using the proton beam of the Cyclotron Accelerator insiding in 100 Ru isotope. (author)

  12. A Very Fast and Angular Momentum Conserving Tree Code

    Energy Technology Data Exchange (ETDEWEB)

    Marcello, Dominic C., E-mail: dmarce504@gmail.com [Department of Physics and Astronomy, and Center for Computation and Technology Louisiana State University, Baton Rouge, LA 70803 (United States)

    2017-09-01

    There are many methods used to compute the classical gravitational field in astrophysical simulation codes. With the exception of the typically impractical method of direct computation, none ensure conservation of angular momentum to machine precision. Under uniform time-stepping, the Cartesian fast multipole method of Dehnen (also known as the very fast tree code) conserves linear momentum to machine precision. We show that it is possible to modify this method in a way that conserves both angular and linear momenta.

  13. Analytical scheme calculations of angular momentum coupling and recoupling coefficients

    Science.gov (United States)

    Deveikis, A.; Kuznecovas, A.

    2007-03-01

    We investigate the Scheme programming language opportunities to analytically calculate the Clebsch-Gordan coefficients, Wigner 6j and 9j symbols, and general recoupling coefficients that are used in the quantum theory of angular momentum. The considered coefficients are calculated by a direct evaluation of the sum formulas. The calculation results for large values of quantum angular momenta were compared with analogous calculations with FORTRAN and Java programming languages.

  14. Analytical scheme calculations of angular momentum coupling and recoupling coefficients

    International Nuclear Information System (INIS)

    Deveikis, A.; Kuznecovas, A.

    2007-01-01

    We investigate the Scheme programming language opportunities to analytically calculate the Clebsch-Gordan coefficients, Wigner 6j and 9j symbols, and general recoupling coefficients that are used in the quantum theory of angular momentum. The considered coefficients are calculated by a direct evaluation of the sum formulas. The calculation results for large values of quantum angular momenta were compared with analogous calculations with FORTRAN and Java programming languages

  15. Orbital and angular motion construction for low thrust interplanetary flight

    Science.gov (United States)

    Yelnikov, R. V.; Mashtakov, Y. V.; Ovchinnikov, M. Yu.; Tkachev, S. S.

    2016-11-01

    Low thrust interplanetary flight is considered. Firstly, the fuel-optimal control is found. Then the angular motion is synthesized. This motion provides the thruster tracking of the required by optimal control direction. And, finally, reaction wheel control law for tracking this angular motion is proposed and implemented. The numerical example is given and total operation time for thrusters is found. Disturbances from solar pressure, thrust eccentricity, inaccuracy of reaction wheels installation and errors of inertia tensor are taken into account.

  16. Spatial Angular Compounding for Elastography without the Incompressibility Assumption

    OpenAIRE

    Rao, Min; Varghese, Tomy

    2005-01-01

    Spatial-angular compounding is a new technique that enables the reduction of noise artifacts in ultrasound elastography. Previous results using spatial angular compounding, however, were based on the use of the tissue incompressibility assumption. Compounded elastograms were obtained from a spatially-weighted average of local strain estimated from radiofrequency echo signals acquired at different insonification angles. In this paper, we present a new method for reducing the noise artifacts in...

  17. Diffraction by a plane angular sector, a new derivation

    DEFF Research Database (Denmark)

    Hansen, Thokild B.

    1990-01-01

    An alternative derivation is given for the exact solution to the scattering problem in which a Hertz dipole illuminates a perfectly conducting plane angular sector. Specifically, the Ohm-Rayleigh method is used rather than that of Satterwhite (1969)......An alternative derivation is given for the exact solution to the scattering problem in which a Hertz dipole illuminates a perfectly conducting plane angular sector. Specifically, the Ohm-Rayleigh method is used rather than that of Satterwhite (1969)...

  18. Shape coexistence in 72Kr at finite angular momentum

    International Nuclear Information System (INIS)

    Almehed, Daniel; Walet, Niels R.

    2004-01-01

    We investigate shape coexistence in a rotating nucleus. We concentrate on the case of 72 Kr which exhibits an interesting interplay between prolate and oblate shaped states as a function of angular momentum. The calculation uses the local harmonic version of the method of self-consistent adiabatic large-amplitude collective motion. We analyse how the collective behaviour of the system changes with angular momentum and we focus on the role of non-axial shapes

  19. Spin and intrinsic angular momentum; application to the electromagnetic field

    International Nuclear Information System (INIS)

    Paillere, P.

    1993-05-01

    Within the framework of the field theory governed by a Lagrangian, function of the tensor quantities and their covariant first derivatives, and starting with the third order intrinsic angular momentum tensor obtained from a variational principle, the intrinsic angular momentum vector of the electromagnetic field in vacuum is determined. This expression leads to spin matrices for the electromagnetic field, with unity as eigenvalue, thus allowing to bridge the gap between continuous physics and quantum physics. 6 refs

  20. Effects of angular misalignment on optical klystron undulator radiation

    Energy Technology Data Exchange (ETDEWEB)

    Mishra, G., E-mail: gmishra_dauniv@yahoo.co.in; Prakash, Bramh; Gehlot, Mona

    2015-11-21

    In this paper ,we analyze the important effects of optical klystron undulator radiation with an angular offset of the relativistic electron beam in the second undulator section. An anlytical expression for the undulator radiation is obtained through a transparent and simple procedure.It is shown that the effects of the angular offset is more severe for longer undulator lengths and with higher dispersive field strengths.Both these effects are less pronounced for undulators with large K values.

  1. Angular momentum of circularly polarized light in dielectric media

    Science.gov (United States)

    Mansuripur, Masud

    2005-07-01

    A circularly polarized plane-wave is known to have no angular momentum when examined through Maxwell’s equations. This, however, contradicts the experimentally observed facts, where finite segments of plane waves are known to be capable of imparting angular momentum to birefringent platelets. Using a superposition of four plane-waves propagating at slightly different angles to a common direction, we derive an expression for the angular momentum density of a single plane-wave in the limit when the propagation directions of the four beams come into alignment. We proceed to use this four-beam technique to analyze the conservation of angular momentum when a plane-wave enters a dielectric slab from the free space. The angular momentum of the beam is shown to decrease upon entering the dielectric medium, by virtue of the fact that the incident beam exerts a torque on the slab surface at the point of entry. When the beam leaves the slab, it imparts an equal but opposite torque to the exit facet, thus recovering its initial angular momentum upon re-emerging into the free-space. Along the way, we derive an expression for the outward-directed force of a normally incident, finite-diameter beam on a dielectric surface; the possible relationship between this force and the experimentally observed bulging of a liquid surface under intense illumination is explored.

  2. Investigation of angular and axial smoothing of PET data

    International Nuclear Information System (INIS)

    Daube-Witherspoon, M.E.; Carson, R.E.

    1996-01-01

    Radial filtering of emission and transmission data is routinely performed in PET during reconstruction in order to reduce image noise. Angular smoothing is not typically done, due to the introduction of a non-uniform resolution loss; axial filtering is also not usually performed on data acquired in 2D mode. The goal of this paper was to assess the effects of angular and axial smoothing on noise and resolution. Angular and axial smoothing was incorporated into the reconstruction process on the Scanditronix PC2048-15B brain PET scanner. In-plane spatial resolution and noise reduction were measured for different amounts of radial and angular smoothing. For radial positions away from the center of the scanner, noise reduction and degraded tangential resolution with no loss of radial resolution were seen. Near the center, no resolution loss was observed, but there was also no reduction in noise for angular filters up to a 7 degrees FWHM. These results can be understood by considering the combined effects of smoothing projections across rows (angles) and then summing (backprojecting). Thus, angular smoothing is not optimal due to its anisotropic noise reduction and resolution degradation properties. However, uniform noise reduction comparable to that seen with radial filtering can be achieved with axial smoothing of transmission data. The axial results suggest that combined radial and axial transmission smoothing could lead to improved noise characteristics with more isotropic resolution degradation

  3. A systematic construction of microstate geometries with low angular momentum

    Science.gov (United States)

    Bena, Iosif; Heidmann, Pierre; Ramírez, Pedro F.

    2017-10-01

    We outline a systematic procedure to obtain horizonless microstate geometries that have the same charges as three-charge five-dimensional black holes with a macroscopically-large horizon area and an arbitrarily-small angular momentum. There are two routes through which such solutions can be constructed: using multi-center Gibbons-Hawking (GH) spaces or using superstratum technology. So far the only solutions corre-sponding to microstate geometries for black holes with no angular momentum have been obtained via superstrata [1], and multi-center Gibbons-Hawking spaces have been believed to give rise only to microstate geometries of BMPV black holes with a large angular mo-mentum [2]. We perform a thorough search throughout the parameter space of smooth horizonless solutions with four GH centers and find that these have an angular momentum that is generally larger than 80% of the cosmic censorship bound. However, we find that solutions with three GH centers and one supertube (which are smooth in six-dimensional supergravity) can have an arbitrarily-low angular momentum. Our construction thus gives a recipe to build large classes of microstate geometries for zero-angular-momentum black holes without resorting to superstratum technology.

  4. Effect of nutritional intake towards Angular cheilitis of orphanage children

    Directory of Open Access Journals (Sweden)

    Nurdiani Rakhmayanthie

    2016-11-01

    Full Text Available Introduction: Angular cheilitis is one of the oral manifestations of iron, vitamin B12, and folate deficiency. This manifestation frequently seen in people at first and second decade. The purpose of this study was to obtain the prevalence of angular cheilitis and its classifications related to the nutritional intake level in 6-18 years old children. Methods: This research was a descriptive study with 53 children between 6-18 years old from Muhammadiyah Orphanage Bandung as the samples. The oral cavity was examined clinically and their food consumption in a week was noted in Food Recall 24 hours and Food Frequency Questionnaire (FFQ in order to measure their nutritional intake level. Results: There are 23 children with angular cheilitis. 13% has iron and folate deficiencies, and 87% has iron, vitamin B12, and folate deficiencies. Angular cheilitis types that has been found are Type I (39%, Type II (48% and Type III (13%. Conclusion: The prevalence of angular cheilitis in 6-18 years old children in Muhammadiyah Orphanage Bandung was moderately high, most of them were having iron, vitamin B12, and folate deficiencies. Type II angular cheilitis was the most frequently seen.

  5. Detecção de Treponema denticola em casos de abscesso perirradicular agudo Detection of Treponema denticola in cases of acute periradicular abscesses

    Directory of Open Access Journals (Sweden)

    Isabela das Neves RÔÇAS

    2000-09-01

    Full Text Available Nosso objetivo foi detectar Treponema denticola em casos de abscesso perirradicular agudo. O DNA extraído das amostras de pus foi examinado pelo método da "Polymerase Chain Reaction" direcionada para o gene do RNAr (fração 16S. A amplificação usando o "primer" da espécie Treponema denticola permitiu detectá-la em 5 dos 6 casos de abscessos examinados. Apenas uma banda de tamanho esperado foi observada para as amostras positivas para esta bactéria, o que foi confirmado pela comparação com o DNA de referência do Treponema denticola (controle positivo. Até o momento, este é o primeiro relato da presença desta espiroqueta, considerada um importante patógeno periodontal em infecções endodônticas. Os resultados sugerem que Treponema denticola também pode ser um importante patógeno endodôntico.The purpose of this study was to report the detection of Treponema denticola in five out of six cases of acute periradicular abscesses. The 16S rRNA gene directed Polymerase Chain Reaction was the method utilized. This is probably the first report hitherto of the occurrence of this spirochete in acute periradicular abscesses.

  6. Precisión diagnóstica de un modelo de redes bayesianas en los síndromes coronarios agudos

    Directory of Open Access Journals (Sweden)

    John Sprockel

    2015-08-01

    Full Text Available Introducción: La caracterización diagnóstica del dolor torácico, con énfasis en los síndromes coronarios agudos (SCA es un requerimiento primordial para los médicos del área de urgencias. Objetivos: En el presente estudio se busca diseñar y evaluar el desempeño de las redes bayesianas en el apoyo al diagnóstico de los SCA. Metodología: Se trata de un estudio de pruebas diagnósticas en el cual se diseñaron dos modelos de redes bayesianas entrenadas en el framework OpenMarkov, a partir de las variables de la escala de probabilidad de Braunwald de angina en un grupo de 159 pacientes que luego se validó en una cohorte de 108 pacientes adultos hospitalizados con sospecha de un SCA en un hospital de tercer nivel de atención. Resultados: Se obtuvo una sensibilidad baja aunque con especificidad y valor predictivo positivo adecuados (62, 86 y 87% respectivamente. El rendimiento fue mejor en los casos que tuvieron electrocardiograma y biomarcadores negativos. Conclusiones: Un modelo de redes Bayesianas entrenado a partir de las variables de la escala de probabilidad de angina inestable de Braunwald, presenta un rendimiento aceptable para el diagnóstico de los SCA.

  7. Tomografia computadorizada sem contraste intravenoso no abdome agudo: quando e por que usar When and why use unenhanced computed tomography in patients with acute abdomen

    Directory of Open Access Journals (Sweden)

    Edison de Oliveira Freire Filho

    2006-02-01

    Full Text Available A tomografia computadorizada sem contraste intravenoso tem sido freqüentemente proposta na avaliação inicial de pacientes com suspeita de abdome agudo, ocupando o espaço de outros métodos diagnósticos. Os autores apresentam uma revisão bibliográfica dos principais aspectos e eficácia da tomografia computadorizada sem contraste intravenoso no diagnóstico de apendicite aguda, cólica nefrética, diverticulite, pancreatite aguda, apendicite epiplóica, pneumoperitônio e obstrução intestinal. Discutem quais as vantagens e limitações desta técnica de exame, bem como seus aspectos práticos.The use of unenhanced computed tomography has been frequently recommended for the initial assessment of patients with clinical suspicion of acute abdomen instead of other diagnostic methods. The authors present a review of the literature on the main aspects, advantages, limitations and efficacy of unenhanced computed tomography for the diagnosis of acute appendicitis, renal colic, diverticulitis, acute pancreatitis, primary epiploic appendicitis, pneumoperitoneum and small bowel obstruction. The advantages and limitations of this technique are also discussed.

  8. Acute gastric volvulus: report of a case Vólvulo gástrico agudo: etiopatogénesis, diagnóstico y tratamiento

    Directory of Open Access Journals (Sweden)

    Sergio Hoyos

    1997-03-01

    Full Text Available This paper presents a case of acute gastric volvulus related to diaphragmatic elevation due to a lung resection performed twenty eight years before, as a consequence of pulmonary tuberculosis. Gastric volvulus is rarely found; the disorder is usually chronic and originales from concurrent diaphragmatic defects or derangements. Pathogenesis and diagnosis of acute gastric volvulus as well as different treatment alternatives are discussed. Se presenta un caso de vólvulo gástrico agudo asociado a elevación del diafragma, secundaria a una neumonectomía practicada 28 años antes por tuberculosis pulmonar. El vólvulo gástrico es una entidad clínica poco frecuente que ocurre, en general, en forma crónica y secundaria a patología diafragmática. Se discuten la etiopatogénesis, el diagnóstico y las diferentes alternativas de tratamiento en pacientes con esta entidad.

  9. ANÁLISIS COMPARATIVO DE LOS EFECTOS AGUDOS DE SESIONES DE ENTRENAMIENTO DE FUERZA CON CARGAS DEL 90 Y 30% 1 RM.

    Directory of Open Access Journals (Sweden)

    Jorge Dopico Calvo

    2010-10-01

    Full Text Available En una medición inicial (Pretest se obtuvo la 1RM de 23 sujetos masculinos en el ejercicio press banca, así como la potencia y fuerza media aplicada al 90 y 30% de 1RM (PMED90, FMED90, PMED30, FMED 30. Posteriormente 11 sujetos (Gr90 llevaron a cabo 2 sesiones de entrenamiento con cargas del 90%, mientras los 12 sujetos restantes (Gr30 lo hacían con cargas del 30%. Inmediatamente finalizada cada una de las sesiones se valoraba nuevamente PMED90, FMED90, PMED30, FMED30. Una semana después de la finalización de los entrenamientos se efectuó un Postest. Los resultados mostraron una mejora estadísticamente significativa del rendimiento de Gr30 al final de cada una de las sesiones de entrenamiento, respecto a Pretest y Postest, con el 90% de 1RM, mientras que Gr90 obtuvo mejoras significativas con el 30% respecto a Pretest, pero no respecto a Postest.
    PALABRAS CLAVE: fuerza, potencia, medición, efecto agudo.

  10. Síndrome coronario agudo y enfermedad de Erdheim-Chester. Patogénesis e implicaciones terapéuticas

    Directory of Open Access Journals (Sweden)

    José Carlos Alarcón-García

    2017-05-01

    Full Text Available La enfermedad de Erdheim-Chester es una histiocitosis celular diferente a la histiocitosis de Langerhans, de origen incierto. Se caracteriza por una implicación multi-orgánica debida a la infiltración de los histiocitos CD68+/CD1a-, en forma de xantogranulomas, que afectan principal y comúnmente a la metáfisis y diáfisis de huesos largos. El diagnóstico se realiza mediante biopsia, donde se revelan histiocitos CD68+/CD1a-, carencia de proteína S, y presencia de gránulos de Birbeck. Se ha subestimado la implicación cardiovascular. Reportamos un caso de un varón de 67 años con la enfermedad de Erdheim-Chester e infarto de miocardio agudo, debido a implicación coronaria, además de enfermedad ósea, vascular, pituitaria y retroperitoneal. Revisamos la literatura relevante y describimos el tratamiento clínico de estos pacientes.

  11. The Angular Momentum of Baryons and Dark Matter Halos Revisited

    Science.gov (United States)

    Kimm, Taysun; Devriendt, Julien; Slyz, Adrianne; Pichon, Christophe; Kassin, Susan A.; Dubois, Yohan

    2011-01-01

    Recent theoretical studies have shown that galaxies at high redshift are fed by cold, dense gas filaments, suggesting angular momentum transport by gas differs from that by dark matter. Revisiting this issue using high-resolution cosmological hydrodynamics simulations with adaptive-mesh refinement (AMR), we find that at the time of accretion, gas and dark matter do carry a similar amount of specific angular momentum, but that it is systematically higher than that of the dark matter halo as a whole. At high redshift, freshly accreted gas rapidly streams into the central region of the halo, directly depositing this large amount of angular momentum within a sphere of radius r = 0.1R(sub vir). In contrast, dark matter particles pass through the central region unscathed, and a fraction of them ends up populating the outer regions of the halo (r/R(sub vir) > 0.1), redistributing angular momentum in the process. As a result, large-scale motions of the cosmic web have to be considered as the origin of gas angular momentum rather than its virialised dark matter halo host. This generic result holds for halos of all masses at all redshifts, as radiative cooling ensures that a significant fraction of baryons remain trapped at the centre of the halos. Despite this injection of angular momentum enriched gas, we predict an amount for stellar discs which is in fair agreement with observations at z=0. This arises because the total specific angular momentum of the baryons (gas and stars) remains close to that of dark matter halos. Indeed, our simulations indicate that any differential loss of angular momentum amplitude between the two components is minor even though dark matter halos continuously lose between half and two-thirds of their specific angular momentum modulus as they evolve. In light of our results, a substantial revision of the standard theory of disc formation seems to be required. We propose a new scenario where gas efficiently carries the angular momentum generated

  12. Bloqueio pleural bilateral: analgesia e funções pulmonares em pós-operatório de laparotomias medianas Bloqueo pleural bilateral: analgesia y funciones pulmonares en pós-operatorio de laparotomias medianas Bilateral pleural block: analgesia and pulmonary functions in postoperative of median laparotomies

    Directory of Open Access Journals (Sweden)

    Karl Otto Geier

    2004-08-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Não obstante o bloqueio pleural ter sido convertido quase numa panacéia analgésica, resultados contraditórios foram publicados. O objetivo deste estudo foi observar o desempenho analgésico e espirométrico das funções pulmonares no pós-operatório imediato de 21 pacientes com o bloqueio pleural bilateral em laparotomias medianas de urgência. MÉTODO: Bloqueio pleural bilateral foi realizado em decúbito dorsal horizontal em 21 pacientes com 20 ml de bupivacaína a 0,375% com adrenalina a 1:400.000 administrados por cateter em cada hemitórax durante o pós-operatório imediato. Soluções aleatórias de bupivacaína e de solução fisiológica foram administradas por residentes ou enfermeiras que desconheciam o conteúdo das seringas, e seus desfechos analgésicos avaliados de acordo com a escala de dor Prince Henry ao comparar os valores pré e pós-bloqueio pleural bilateral. Em função da dor pós-operatória, testes espirométricos das funções pulmonares também foram determinados mediante espirômetro portátil. RESULTADOS: Analgesia pós-operatória, com duração média de 247,75 ± 75 minutos foi constatada em todos os pacientes com a bupivacaína, embora tenha persistido dor residual de menor intensidade na região suprapúbica em cinco pacientes (8% e em dois pacientes na apófise xifóide (3,2%. Nenhum efeito analgésico foi obtido com solução fisiológica. Face à dor pós-operatória, as funções pulmonares, avaliadas antes e após os bloqueios, registraram melhora com a bupivacaína na CVF (p JUSTIFICATIVA Y OBJETIVOS: No obstante el bloqueo pleural haber sido convertido casi en una panacea analgésica, fueron publicados resultados contradictorios. El objetivo de este estudio fue observar el desempeño analgésico y espirométrico de las funciones pulmonares en el pós-operatorio inmediato de 21 pacientes con el bloqueo pleural bilateral en laparotomias medianas de urgencia. M

  13. Síndrome de Tako-Tsubo em decorrência de bloqueio neuromuscular residual: relato de caso Síndrome de Tako-Tsubo como consecuencia de bloqueo neuromuscular residual: relato de caso Tako-Tsubo syndrome secondary to residual neuromuscular blockade: case report

    Directory of Open Access Journals (Sweden)

    Marcos Guilherme Cunha Cruvinel

    2008-12-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A síndrome de Tako-Tsubo é uma complicação pós-operatória rara, com mortalidade em torno de 5%. O objetivo deste relato é apresentar o bloqueio neuromuscular residual como fator desencadeante da referida síndrome, discutir sobre a mesma e alertar sobre o bloqueio neuromuscular residual. RELATO DO CASO: Paciente do sexo feminino, 61 anos, estado físico ASA I, submetida à anestesia geral associada a bloqueio paravertebral cervical para reparo artroscópico de lesão de manguito rotator. Após extubação foi evidenciado bloqueio neuromuscular residual por meio do exame clínico. Na sala de recuperação pós-anestésica evoluiu com sonolência, taquicardia, hipertensão arterial e acidose respiratória grave. Após a reintubação, evoluiu com parada cardíaca em atividade elétrica sem pulso, revertida com adrenalina e massagem cardíaca externa. Apresentou no pós-operatório elevação de segmento ST, aumento de troponina e acinesia de segmento médio-apical de ventrículo esquerdo com fração de ejeção estimada em 30%. A cineangiocoronariografia mostrou coronárias isentas de ateromatose significativa e grave comprometimento da função sistólica com acinesia inferior e ântero-septo-apical com hipercontratilidade compensatória de suas porções basais. Com o tratamento instituído houve recuperação funcional completa. CONCLUSÕES: O bloqueio neuromuscular residual associado à paralisia diafragmática e possível atelectasia pulmonar levando a insuficiência respiratória, hipercapnia e descarga adrenérgica foram os fatores desencadeantes da síndrome de Tako-Tsubo com sua grave repercussão clínica.JUSTIFICATIVA Y OBJETIVOS: El Síndrome de Tako-Tsubo es una complicación postoperatoria rara con una mortalidad en torno de un 5%. El objetivo de este relato es presentar el bloqueo neuromuscular residual como factor desencadenante del referido síndrome, discutir sobre él y alertar sobre el bloqueo

  14. Initial angular momentum and flow in high energy nuclear collisions

    Science.gov (United States)

    Fries, Rainer J.; Chen, Guangyao; Somanathan, Sidharth

    2018-03-01

    We study the transfer of angular momentum in high energy nuclear collisions from the colliding nuclei to the region around midrapidity, using the classical approximation of the color glass condensate (CGC) picture. We find that the angular momentum shortly after the collision (up to times ˜1 /Qs , where Qs is the saturation scale) is carried by the "β -type" flow of the initial classical gluon field, introduced by some of us earlier. βi˜μ1∇iμ2-μ2∇iμ1 (i =1 ,2 ) describes the rapidity-odd transverse energy flow and emerges from Gauss's law for gluon fields. Here μ1 and μ2 are the averaged color charge fluctuation densities in the two nuclei, respectively. Interestingly, strong coupling calculations using anti-de Sitter/conformal field theory (AdS/CFT) techniques also find an energy flow term featuring this particular combination of nuclear densities. In classical CGC the order of magnitude of the initial angular momentum per rapidity in the reaction plane, at a time 1 /Qs , is |d L2/d η |≈ RAQs-3ɛ¯0/2 at midrapidity, where RA is the nuclear radius, and ɛ¯0 is the average initial energy density. This result emerges as a cancellation between a vortex of energy flow in the reaction plane aligned with the total angular momentum, and energy shear flow opposed to it. We discuss in detail the process of matching classical Yang-Mills results to fluid dynamics. We will argue that dissipative corrections should not be discarded to ensure that macroscopic conservation laws, e.g., for angular momentum, hold. Viscous fluid dynamics tends to dissipate the shear flow contribution that carries angular momentum in boost-invariant fluid systems. This leads to small residual angular momentum around midrapidity at late times for collisions at high energies.

  15. Isotropic gates and large gamma detector arrays versus angular distributions

    International Nuclear Information System (INIS)

    Iacob, V.E.; Duchene, G.

    1997-01-01

    Angular information extracted from in-beam γ ray measurements are of great importance for γ ray multipolarity and nuclear spin assignments. In our days large Ge detector arrays became available allowing the measurements of extremely weak γ rays in almost 4π sr solid angle (e.g., EUROGAM detector array). Given the high detector efficiency it is common for the mean suppressed coincidence multiplicity to reach values as high as 4 to 6. Thus, it is possible to gate on particular γ rays in order to enhance the relative statistics of a definite reaction channel and/or a definite decaying path in the level scheme of the selected residual nucleus. As compared to angular correlations, the conditioned angular distribution spectra exhibit larger statistics because in the latter the gate-setting γ ray may be observed by all the detectors in the array, relaxing somehow the geometrical restrictions of the angular correlations. Since the in-beam γ ray emission is anisotropic one could inquire that gate setting as mentioned above, based on anisotropic γ ray which would perturb the angular distributions in the unfolded events. As our work proved, there is no reason to worry about this if the energy gate runs over the whole solid angle in an ideal 4π sr detector, i.e., if the gate is isotropic. In real quasi 4π sr detector arrays the corresponding quasi isotropic gate preserves the angular properties of the unfolded data, too. However extraction of precise angular distribution coefficient especially a 4 , requires the consideration of the deviation of the quasi isotropic gate relative to the (ideal) isotropic gate

  16. Smoothed dissipative particle dynamics with angular momentum conservation

    Energy Technology Data Exchange (ETDEWEB)

    Müller, Kathrin, E-mail: k.mueller@fz-juelich.de; Fedosov, Dmitry A., E-mail: d.fedosov@fz-juelich.de; Gompper, Gerhard, E-mail: g.gompper@fz-juelich.de

    2015-01-15

    Smoothed dissipative particle dynamics (SDPD) combines two popular mesoscopic techniques, the smoothed particle hydrodynamics and dissipative particle dynamics (DPD) methods, and can be considered as an improved dissipative particle dynamics approach. Despite several advantages of the SDPD method over the conventional DPD model, the original formulation of SDPD by Español and Revenga (2003) [9], lacks angular momentum conservation, leading to unphysical results for problems where the conservation of angular momentum is essential. To overcome this limitation, we extend the SDPD method by introducing a particle spin variable such that local and global angular momentum conservation is restored. The new SDPD formulation (SDPD+a) is directly derived from the Navier–Stokes equation for fluids with spin, while thermal fluctuations are incorporated similarly to the DPD method. We test the new SDPD method and demonstrate that it properly reproduces fluid transport coefficients. Also, SDPD with angular momentum conservation is validated using two problems: (i) the Taylor–Couette flow with two immiscible fluids and (ii) a tank-treading vesicle in shear flow with a viscosity contrast between inner and outer fluids. For both problems, the new SDPD method leads to simulation predictions in agreement with the corresponding analytical theories, while the original SDPD method fails to capture properly physical characteristics of the systems due to violation of angular momentum conservation. In conclusion, the extended SDPD method with angular momentum conservation provides a new approach to tackle fluid problems such as multiphase flows and vesicle/cell suspensions, where the conservation of angular momentum is essential.

  17. Modeling of the angular dependence of plasma etching

    International Nuclear Information System (INIS)

    Guo Wei; Sawin, Herbert H.

    2009-01-01

    An understanding of the angular dependence of etching yield is essential to investigate the origins of sidewall roughness during plasma etching. In this article the angular dependence of polysilicon etching in Cl 2 plasma was modeled as a combination of individual angular-dependent etching yields for ion-initiated processes including physical sputtering, ion-induced etching, vacancy generation, and removal. The modeled etching yield exhibited a maximum at ∼60 degree sign off-normal ion angle at low flux ratio, indicative of physical sputtering. It transformed to the angular dependence of ion-induced etching with the increase in the neutral-to-ion flux ratio. Good agreement between the modeling and the experiments was achieved for various flux ratios and ion energies. The variation of etching yield in response to the ion angle was incorporated in the three-dimensional profile simulation and qualitative agreement was obtained. The surface composition was calculated and compared to x-ray photoelectron spectroscopy (XPS) analysis. The modeling indicated a Cl areal density of 3x10 15 atoms/cm 2 on the surface that is close to the value determined by the XPS analysis. The response of Cl fraction to ion energy and flux ratio was modeled and correlated with the etching yields. The complete mixing-layer kinetics model with the angular dependence effect will be used for quantitative surface roughening analysis using a profile simulator in future work.

  18. Bloqueio dos nervos femoral e isquiático guiados por ultrassom em paciente anticoagulado: case reports Bloqueo de los nervios femoral e isquiático guiados por ultrasonido en paciente anticoagulado Ultrasound-guided femoral and sciatic nerve blocks in an anticoagulated patient: relato de casos

    Directory of Open Access Journals (Sweden)

    Leonardo Henrique Cunha Ferraro

    2010-08-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O uso de ultrassom para guiar a punção em bloqueios de nervos periféricos tem-se tornado cada vez mais frequente. Com a menor probabilidade de promover lesões vasculares, o ultrassom torna-se uma ferramenta interessante na realização de bloqueios periféricos, especialmente nos pacientes em uso de anticoagulantes ou com distúrbios da coagulação. O objetivo foi relatar dois casos em que se realizaram os bloqueios isquiático e femoral guiados por ultrassom em pacientes anticoagulados. RELATO DOS CASOS: No primeiro caso, a cirurgia realizada consistiu na amputação de antepé esquerdo devido a necrose e sinais de infecção e, no segundo caso, em limpeza cirúrgica de joelho esquerdo. Os pacientes apr esentavam distúrbios de coagulação com atividade de protrombina e tempo de tromboplastina ativado acima dos valores da normalidade. Ambos os pacientes foram submetidos a bloqueio femoral e isquiático guiados por ultrassom, evoluindo sem alteração motora ou sensitiva nos territórios desses nervos e sem hematoma no local da punção. CONCLUSÕES: A anticoagulação impõe certas restrições à aplicação das técnicas anestésicas regionais clássicas. Com o avanço dos equipamentos e métodos de ultrassom, hoje é possível identificar com alta precisão estruturas vasculares e neurais. Isso possibilita que a punção guiada por ultrassom seja mais precisa, tanto para atingir a área de interesse como para minimizar os riscos de lesão vascular acidental. Até o presente, não se recomenda a realização de bloqueio periférico em pacientes anticoagulados ou portadores de coagulopatias. Entretanto, considerando que há poucos relatos sobre bloqueios regionais com ultrassom em situações de coagulopatias, a segurança de tal técnica nessas condições ainda não foi estabelecida.JUSTIFICATIVA Y OBJETIVOS: El uso del ultrasonido para guiar la punción en bloqueos de nervios periféricos se ha convertido

  19. Bloqueo de los nervios iliohipogástrico e ilioinguinal para analgesia posquirúrgica en cesárea tipo Pfannenstiel realizada bajo anestesia general: ¿qué concentración del anestésico local usar? Iliohypogastric and ilioinguinal block for postsurgical analgesia after pfannenstiel cesarean section performed under general anaesthesia

    Directory of Open Access Journals (Sweden)

    Héctor Iván García García

    1998-03-01

    Full Text Available El bloqueo bilateral de los nervios Iliohipogástrico e Ilioinguinal con bupivacaína al 0.5% puede proveer analgesia luego de cesárea con incisión de Pfannenstiel aunque la cantidad de droga usada está cerca de la dosis máxima segura. Diseñamos este estudio para comparar el efecto analgésico de la bupivacaína al 0.5% y diluida al 0.25%. Se incluyeron treinta pacientes aleatoriamente asignadas a un grupo de estudio (bupivacaína 0.25%, n= 15 y uno de control (bupivacaína 0.5%, n=15. Se evaluaron las pacientes con una Escala Visual Análoga (EVA a las O, 4, 8, 12 y 24 horas posoperatorias por médicos que no sabían a qué grupo pertenecían y sólo en caso de necesidad se prescribió analgesia IM con Diclofenaco. Los puntajes de analgesia y los requerimientos de anal. gesia complementaria fueron notoriamente simila. res en ambos grupos y no hubo diferencias estadísticamente significativas. Concluimos que el bloqueo de estos nervios es una técnica analgésica efectiva (el dolor siempre estuvo en promedio por debajo de 4 en la EVA, que no es afectada por la dilución del anestésico y que además es segura pues no se presentaron complicaciones. The Iliohypogastric and Ilioinguinal bilate. ral block with 0.5% bupivacaine can provide analgesia after Pfannenstiel cesarean section although the required amount of the drug is near the maximum secure dose. We designed this study in order to compare the analgesic effect of 0.5% bupivacaine and diluted 0.25% bupivacaine. Thirty patients were included in the study and asigned in aleatory form to either a study (0.25% bupivacaine n=15 or a control group (0.5% bupivacaine n=15. They were evaluated with the Visual Analogue Scale (VAS at 0,4,8,12,24 postoperative hours by physicians who did not know the group of the patient and prescribed intramuscular analgesia with Dicofenac only if required. The analgesia scores and the complementery analgesia requirements were similar in both groups and there were

  20. Time variations of the angular momentum of the sun

    International Nuclear Information System (INIS)

    Schatten, K.H.

    1977-01-01

    Time variations of density models of the Sun are investigated. This is an attempt to estimate the changing moment of inertia of the Sun in order to calculate the internal solar angular velocity based upon Newton's equation of motion. Previous estimates of dI/dt disagree with those based upon central densities in a homologously contracting model. It is shown that the homologously contracting model leads to large errors in dI/dt. Based upon an integration of Sears's solar model, dI/dt=-5.5 x 10 34 gm cm 2 s -1 . This suggests a core angular velocity of /sub thetar-italic/ = (0.15 +- 0.03) x 10 -3 s -1 , corresponding to a period of 0.5 +- 0.1 days, assuming a constant angular velocity with time. The brackets indicate a weighting which is discussed

  1. Nuclear level density variation with angular momentum induced shape transition

    International Nuclear Information System (INIS)

    Aggarwal, Mamta

    2016-01-01

    Variation of Nuclear level density (NLD) with the excitation energy and angular momentum in particular has been a topic of interest in the recent past and there have been continuous efforts in this direction on the theoretical and experimental fronts but a conclusive trend in the variation of nuclear level density parameter with angular momentum has not been achieved so far. A comprehensive investigation of N=68 isotones around the compound nucleus 119 Sb from neutron rich 112 Ru (Z=44) to neutron deficient 127 Pr (Z= 59) nuclei is presented to understand the angular momentum induced variations in inverse level density parameter and the possible influence of deformation and structural transitions on the variations on NLd

  2. Orbital Angular Momentum Multiplexing over Visible Light Communication Systems

    Science.gov (United States)

    Tripathi, Hardik Rameshchandra

    This thesis proposes and explores the possibility of using Orbital Angular Momentum multiplexing in Visible Light Communication system. Orbital Angular Momentum is mainly applied for laser and optical fiber transmissions, while Visible Light Communication is a technology using the light as a carrier for wireless communication. In this research, the study of the state of art and experiments showing some results on multiplexing based on Orbital Angular Momentum over Visible Light Communication system were done. After completion of the initial stage; research work and simulations were performed on spatial multiplexing over Li-Fi channel modeling. Simulation scenarios which allowed to evaluate the Signal-to-Noise Ratio, Received Power Distribution, Intensity and Illuminance were defined and developed.

  3. Angular Magnetoresistance of Nanowires with Alternating Cobalt and Nickel Segments

    KAUST Repository

    Mohammed, Hanan

    2017-06-22

    Magnetization reversal in segmented Co/Ni nanowires with varying number of segments was studied using angular Magnetoresistance (MR) measurements on isolated nanowires. The MR measurements offer an insight into the pinning of domain walls within the nanowires. Angular MR measurements were performed on nanowires with two and multiple segments by varying the angle between the applied magnetic field and nanowire (−90° ≤θ≤90°). The angular MR measurements reveal that at lower values of θ the switching fields are nearly identical for the multisegmented and two-segmented nanowires, whereas at higher values of θ, a decrease in the switching field is observed in the case of two segmented nanowires. The two segmented nanowires generally exhibit a single domain wall pinning event, whereas an increased number of pinning events are characteristic of the multisegmented nanowires at higher values of θ. In-situ magnetic force microscopy substantiates reversal by domain wall nucleation and propagation in multisegmented nanowires.

  4. ANGULAR LIGHT-SCATTERING STUDIES ON ISOLATED MITOCHONDRIA

    Science.gov (United States)

    Gotterer, Gerald S.; Thompson, Thomas E.; Lehninger, Albert L.

    1961-01-01

    Angular light-scattering studies have been carried out on suspensions of isolated rat liver mitochondria. The angular scatter pattern has a large forward component, typical of large particles. Changes in dissymmetry and in the intensity of light scattered at 90° have been correlated with changes in optical density during the course of mitochondrial swelling and contraction. Such changes can be measured at mitochondrial concentrations much below those required for optical density measurements. Changes in mitochondrial geometry caused by factors "leaking" from mitochondria, not detectable by optical density measurements, have been demonstrated by measuring changes in dissymmetry. Angular light-scattering measurements therefore offer the advantages of increased sensitivity and of added indices of changes in mitochondrial conformation. PMID:19866589

  5. Characteristic evolutions in numerical relativity using six angular patches

    International Nuclear Information System (INIS)

    Reisswig, Christian; Bishop, Nigel T; Lai, Chi Wai; Thornburg, Jonathan; Szilagyi, Bela

    2007-01-01

    The characteristic approach to numerical relativity is a useful tool in evolving gravitational systems. In the past this has been implemented using two patches of stereographic angular coordinates. In other applications, a six-patch angular coordinate system has proved effective. Here we investigate the use of a six-patch system in characteristic numerical relativity, by comparing an existing two-patch implementation (using second-order finite differencing throughout) with a new six-patch implementation (using either second- or fourth-order finite differencing for the angular derivatives). We compare these different codes by monitoring the Einstein constraint equations, numerically evaluated independently from the evolution. We find that, compared to the (second-order) two-patch code at equivalent resolutions, the errors of the second-order six-patch code are smaller by a factor of about 2, and the errors of the fourth-order six-patch code are smaller by a factor of nearly 50

  6. Measuring average angular velocity with a smartphone magnetic field sensor

    Science.gov (United States)

    Pili, Unofre; Violanda, Renante

    2018-02-01

    The angular velocity of a spinning object is, by standard, measured using a device called a tachometer. However, by directly using it in a classroom setting, the activity is likely to appear as less instructive and less engaging. Indeed, some alternative classroom-suitable methods for measuring angular velocity have been presented. In this paper, we present a further alternative that is smartphone-based, making use of the real-time magnetic field (simply called B-field in what follows) data gathering capability of the B-field sensor of the smartphone device as the timer for measuring average rotational period and average angular velocity. The in-built B-field sensor in smartphones has already found a number of uses in undergraduate experimental physics. For instance, in elementary electrodynamics, it has been used to explore the well-known Bio-Savart law and in a measurement of the permeability of air.

  7. Angular Momentum Transport in Turbulent Flow between Independently Rotating Cylinders

    International Nuclear Information System (INIS)

    Paoletti, M. S.; Lathrop, D. P.

    2011-01-01

    We present measurements of the angular momentum flux (torque) in Taylor-Couette flow of water between independently rotating cylinders for all regions of the (Ω 1 , Ω 2 ) parameter space at high Reynolds numbers, where Ω 1 (Ω 2 ) is the inner (outer) cylinder angular velocity. We find that the Rossby number Ro=(Ω 1 -Ω 2 )/Ω 2 fully determines the state and torque G as compared to G(Ro=∞)≡G ∞ . The ratio G/G ∞ is a linear function of Ro -1 in four sections of the parameter space. For flows with radially increasing angular momentum, our measured torques greatly exceed those of previous experiments [Ji et al., Nature (London), 444, 343 (2006)], but agree with the analysis of Richard and Zahn [Astron. Astrophys. 347, 734 (1999)].

  8. Angular Magnetoresistance of Nanowires with Alternating Cobalt and Nickel Segments

    KAUST Repository

    Mohammed, Hanan; Corte-Leon, H.; Ivanov, Yurii P.; Moreno, J. A.; Kazakova, O.; Kosel, Jü rgen

    2017-01-01

    Magnetization reversal in segmented Co/Ni nanowires with varying number of segments was studied using angular Magnetoresistance (MR) measurements on isolated nanowires. The MR measurements offer an insight into the pinning of domain walls within the nanowires. Angular MR measurements were performed on nanowires with two and multiple segments by varying the angle between the applied magnetic field and nanowire (−90° ≤θ≤90°). The angular MR measurements reveal that at lower values of θ the switching fields are nearly identical for the multisegmented and two-segmented nanowires, whereas at higher values of θ, a decrease in the switching field is observed in the case of two segmented nanowires. The two segmented nanowires generally exhibit a single domain wall pinning event, whereas an increased number of pinning events are characteristic of the multisegmented nanowires at higher values of θ. In-situ magnetic force microscopy substantiates reversal by domain wall nucleation and propagation in multisegmented nanowires.

  9. Characteristic evolutions in numerical relativity using six angular patches

    Energy Technology Data Exchange (ETDEWEB)

    Reisswig, Christian [Max-Planck-Institut fuer Gravitationsphysik, Albert-Einstein-Institut, Am Muehlenberg 1, D-14476 Golm (Germany); Bishop, Nigel T [Department of Mathematical Sciences, University of South Africa, PO Box 392, Unisa 0003, South Africa (South Africa); Lai, Chi Wai [Department of Mathematical Sciences, University of South Africa, PO Box 392, Unisa 0003, South Africa (South Africa); Thornburg, Jonathan [Max-Planck-Institut fuer Gravitationsphysik, Albert-Einstein-Institut, Am Muehlenberg 1, D-14476 Golm (Germany); Szilagyi, Bela [Max-Planck-Institut fuer Gravitationsphysik, Albert-Einstein-Institut, Am Muehlenberg 1, D-14476 Golm (Germany)

    2007-06-21

    The characteristic approach to numerical relativity is a useful tool in evolving gravitational systems. In the past this has been implemented using two patches of stereographic angular coordinates. In other applications, a six-patch angular coordinate system has proved effective. Here we investigate the use of a six-patch system in characteristic numerical relativity, by comparing an existing two-patch implementation (using second-order finite differencing throughout) with a new six-patch implementation (using either second- or fourth-order finite differencing for the angular derivatives). We compare these different codes by monitoring the Einstein constraint equations, numerically evaluated independently from the evolution. We find that, compared to the (second-order) two-patch code at equivalent resolutions, the errors of the second-order six-patch code are smaller by a factor of about 2, and the errors of the fourth-order six-patch code are smaller by a factor of nearly 50.

  10. Acute clinical events in patients with sickle cell disease: epidemiology and treatment Eventos agudos em doença falciforme: epidemiologia e tratamento

    Directory of Open Access Journals (Sweden)

    Monique M. Loureiro

    2008-04-01

    Full Text Available Sickle cell disease is a hereditary illness of high prevalence in black population, and involved patients frequently have multiple hospitalizations. Our objective was to describe and to analyze the clinical course of hospitalizations in patients with sickle cell disease. Cross-sectional study of 78 patients submitted to 230 hospital admissions due to acute complications of sickle cell disease, from 2000 to 2004 in a public teaching hospital in Rio de Janeiro city, RJ, Brazil. Outcomes variables were length of hospital stay and death. Main covariables were age, gender, chronic renal failure, causes of hospitalization and use of medicines. Proportions were compared using the chi-square or the Fischer test, and for the continuous variables, Mann-Whitney test was used. The median age in years was 20.3 (15-53 and the most frequent clinical event was acute painful episode (73.5%. Mean length of stay was significantly higher in admissions caused by different reasons than acute painful episode (p A doença falciforme é uma doença hereditária, de alta prevalência na população negra, que leva a múltiplas internações hospitalares. Nosso objetivo foi descrever e analisar o curso clínico de pacientes com doença falciforme hospitalizados.Realizou-se estudo transversal de 78 pacientes submetidos a 230 internações hospitalares devido a complicações agudas da doença falciforme, de 2000 a 2004, em um hospital universitário no Rio de Janeiro-RJ, Brasil. Os desfechos estudados foram tempo de permanência hospitalar e óbito. As principais co-variáveis foram idade, sexo, presença de insuficiência renal crônica, causas de hospitalização e uso de medicamentos. Proporções foram comparadas utilizando-se o teste qui-quadrado ou teste de Fischer, e, para as variáveis contínuas, o teste de Mann-Whitney foi utilizado. A mediana da idade foi 20,3 anos (15-23 e o evento clínico mais freqüente foi o episódio doloroso agudo (73,5%. O tempo m

  11. Depth of origin and angular spectrum of sputtered atoms

    International Nuclear Information System (INIS)

    Vicanek, M.; Jimenez Rodriguez, J.J.; Sigmund, P.

    1989-01-01

    A theoretical analysis is presented of the depth of origin of atoms sputtered from a random target. The physical model aims at high energy sputtering under linear cascade conditions and assumes a dilute source of recoil atoms. The initial distribution of the recoils is assumed isotropic, and their energy distribution is E -2 like without an upper or lower cutoff. The scattering medium is either infinite or bounded by a plane surface. Atoms scatter according to the m=0 power cross section. Electronic stopping is ignored. The sputtered flux, differential in depth of origin, ejection energy and ejection angle has been evaluated by Monte Carlo simulation and by five distinct methods of solution of the linear Boltzmann equation reaching from continuous slowing down neglecting angular scattering to the P 3 approximation and a Gram-Charlier expansion going over spatial moments. The continuous slowing down approximation used in previous work leads to results that are identical to those found from a scheme that only ignores angular scattering but allows for energy loss straggling. Moreover, these predictions match more closely with the Monte Carlo results than any of the approximate analytical schemes that take account of angular scattering. The results confirm the common assertion that the depth of origin of sputtered atoms is determined mainly by the stopping of low energy recoil atoms. The effect of angular scattering turns out to be astonishingly small. The distributions in depth of origin, energy, and angle do not depend significantly on whether the scattering medium is a halfspace or an infinite medium with a reference plane. The angular spectrum comes out only very slightly over cosine from the model as it stands, in agreement with previous experience, but comments are made on essential features that are not incorporated in the physical model but might influence the angular spectrum. (orig./WL)

  12. Síndrome de Distrés Respiratorio Agudo: Utilidad de los Corticoides Acute respiratory distress syndrome: Role of steroids

    Directory of Open Access Journals (Sweden)

    Célica L. Irrazábal

    2004-06-01

    Full Text Available En Argentina, el síndrome de distrés respiratorio agudo (SDRA representa el 7.7% de las admisiones en terapia intensiva y está asociado con una alta morbilidad y mortalidad (58%. Con frecuencia la muerte puede ser atribuida a más de una causa. La hipoxemia refractaria es una causa de muerte poco frecuente (15% y en muchos casos puede coexistir con disfunción multiorgánica, sepsis o shock séptico. La utilidad de los esteroides como parte del tratamiento es aún motivo de debate a pesar de las múltiples series de casos y estudios clínicos publicados. En el artículo se evalúa la utilidad de los esteroides en el SDRA a través de la revisión de la bibliografía disponible. Se concluye que los esteroides estarían indicados en un pequeño subgrupo de pacientes con SDRA no resuelto o tardío, después de descartar o controlar una infección activa.The acute respiratory distress syndrome (ARDS represents 7.7% of the intensive care population, and is associated with great morbidity and mortality (58%. Frequently, the mortality can be attributed to more than one cause. Refractory hypoxemia is uncommon (15% and most of the patients also have multiple organic dysfunction, sepsis or septic shock. Although there are many publications concerning series of cases and clinical trials using steroids as a part of the treatment of ARDS, this issue remains controversial. In this article the role of steroids in the ARDS is evaluated by analysis of the available literature. We conclude that steroids are useful in a subgroup of patients with unresolving ARDS, after ruling out an active infection or after treatment with antibiotics.

  13. Efeitos cardiovasculares agudos do exercício resistido em idosas hipertensas = Cute cardiovascular effects of resistence exercise on hypertensive elderly women

    Directory of Open Access Journals (Sweden)

    Kleverton Krinski

    2008-07-01

    Full Text Available O objetivo deste estudo foi avaliar os efeitos cardiovasculares agudos do exercício resistido (ER em idosas com hipertensão estágio I. Participaram 24 hipertensas (63,7 ± 3,7 anos, submetidas a uma sessão de ER, constituída por oito estações (três séries,12 repetições, 50% 1 RM. A frequência cardíaca (FC, a pressão arterial sistólica (PAS e a diastólica (PAD foram mensuradas anteriormente ao início dos exercícios (A, imediatamente após a quinta estação (B e 10 min. após a sessão de exercícios (C. Anova demedidas repetidas e post-hoc Tukey (p The aim of this study was to evaluate the effect of acute cardiovascular responses of resistance exercise (RE on stage I hypertensive elderly women. Twenty four hypertensive women (63.7 ± 3.7 years were subjected a session of RE, with eight stations(3 sets, 12 repetitions, 50% 1 RM. The heart rate (HR, systolic blood pressure (SBP and blood pressure (DBP were measured before the exercise sessions (A, immediately after the fifth station (B, and 10 minutes after the exercise sessions (C. Repeated measuresAnova and post-hoc Tukey test (p < 0.05 were performed. The results demonstrated significant increase in SBP, DBP and HR (p < 0.05 between the A and B conditions. Subsequently, SBP and DBP decreased significantly for the C condition as compared to the B condition (p < 0.05; however, only DBP decreased significantly for the A condition (p < 0.05. Although the results demonstrated that acute cardiovascular modifications are associated with RE, hypotensive effects were only verified on DBP.

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

    Directory of Open Access Journals (Sweden)

    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.

  15. Acute psychotic disorders induced by topiramate: report of two cases Episódio psicótico agudo induzido por topiramato: relato de dois casos

    Directory of Open Access Journals (Sweden)

    Florindo Stella

    2002-06-01

    Full Text Available We report on two epileptic patients who developed acute psychosis after the use of topiramate (TPM. One patient exhibited severe psychomotor agitation, heteroaggressiveness, auditory and visual hallucinations as well as severe paranoid and mystic delusions. The other patient had psychomotor agitation, depersonalization, derealization, severe anxiety and deluded that he was losing his memory. Both patients had to be taken to the casualty room. After interruption of TPM in one patient and reduction of dose in the other, a full remission of the psychotic symptoms was obtained without the need of antipsychotic drugs. Clinicians should be aware of the possibility of development of acute psychotic symptoms in patients undergoing TPM treatment.Relatamos dois pacientes epilépticos que manifestaram quadro psicótico agudo induzido por topiramato (TPM. Um paciente apresentou agitação psicomotora grave, heteroagressividade, alucinações auditivas e visuais, e delírios de conteúdo paranóide e místico. O outro paciente apresentou agitação psicomotora, despersonalização, desrealização, ansiedade intensa e delírio de que estava perdendo a memória. Ambos os pacientes foram conduzidos ao serviço de emergência e, após a interrupção do TPM em um deles e redução da droga em outro, houve remissão total dos sintomas psicóticos sem necessidade de medicação antipsicótica. Alertamos os clínicos para o risco de surgimento de sintomas psicóticos em pacientes em uso do TPM.

  16. Riesgo familiar total en salud y grado de salud familiar en las familias de los pacientes con diagnostico de síndrome coronario agudo

    Directory of Open Access Journals (Sweden)

    Ruby Elizabeth Vargas-Toloza

    2012-12-01

    Full Text Available Objetivo: identificar el riesgo familiar total en salud y grado de salud familiar en las familias de los pacientes con diagnóstico de síndrome coronario agudo de la Clínica San José de Cúcuta. Materiales y Métodos: Estudio cuantitativo, de tipo descriptivo transversal; en el que se calculó una muestra de 165 familias por muestreo no probabilístico. La recolección de la información se realizo por medio de los instrumentos RFT: 5-33 y ISF GEN-21 donde se clasifico el riesgo familiar total y se percibió el grado de salud familiar. Resultados: se evidencia que las familias están conformes con el modelo habitual de organización familiar en función de cada uno de los integrantes y del grupo como tal. Lo cual nos indica que toda la familia del paciente coronario lo ayuda a sobrellevar el proceso de salud-enfermedad y tiene claro el papel que juega dentro de ella permitiendo así la funcionalidad y la unidad que requiere este tipo de pacientes para su rehabilitación. Conclusiones: los factores de riesgo biológicos, sociales y del medio ambiente que clasifican a la población estudiada dentro de riesgo familiar bajo. Se evidenció un alto grado de organización y satisfacción asegurando en gran medida la adaptación y el éxito de las familias frente al proceso de salud- enfermedad por la que atraviesan algunos de los miembros especialmente si es un paciente coronario.

  17. Los efectos agudos de la contaminación del aire en la salud de la población: evidencias de estudios epidemiológicos

    Directory of Open Access Journals (Sweden)

    Rosales-Castillo José Alberto

    2001-01-01

    Full Text Available Objetivo. Sintetizar las evidencias de los efectos en la salud de la población por la exposición a contaminación del aire por ozono y partículas suspendidas. Material y métodos. A partir de las principales publicaciones internacionales y mexicanas, publicadas y referidas hasta junio del año 2000, se realizó un metanálisis para resumir los efectos reportados a través del empleo de modelos de efectos aleatorios. Resultados. Los resultados se expresaron como porcentajes de incremento por 10 unidades de concentración de PM10 (µg/m³ y ozono (ppb. Entre los efectos de PM10 cabe destacar el efecto agudo en la mortalidad (0.96%, hospitalizaciones (1.39%, visitas a salas de urgencias (3.11%, síntomas respiratorios (7.72%, parámetros de función pulmonar (1.42%, para capacidad vital forzada (CVF y días de actividad restringida (7.74%. Los efectos de la exposición a ozono son igualmente significativos. Conclusiones. Estos resultados muestran el gran impacto que las concentraciones de contaminantes del aire podrían tener en la salud de las poblaciones urbanas de las grandes metrópolis. El texto completo en inglés de este artículo está disponible en: http://www.insp.mx/salud/index.html

  18. Efeito agudo da imagética no desempenho de lances livres e percepção de autoeficácia em atletas

    Directory of Open Access Journals (Sweden)

    Thiago Ferreira Dias Kanthack

    2013-12-01

    Full Text Available DOI: http://dx.doi.org/10.5007/1980-0037.2014v16n1p47 O esporte cada vez mais diferencia vencedores e perdedores por mínimos detalhes. No basquetebol um fator diferenciador é o lance livre. Sessões de imagética motora (IMA vêm sendo estudada como um ergogênico sobre o desempenho de lance livre, porém, pouco se estuda o seu efeito agudo, principalmente, em atletas. O objetivo desse estudo foi verificar o efeito de uma sessão prévia de treinamento mental sobre o desempenho no lance livre e na percepção de autoeficácia de jovens atletas. Participaram do estudo 11 atletas juvenis da Federação Paulista de Basquete. Na condição IMA, foram submetidos a 1 minuto de vídeo + 3 minutos de imagética, seguidos de 10 lances livres, e no controle, 4 minutos de repouso seguidos de 10 lances livres. O questionário de autoeficácia foi preenchido antes e após a intervenção. Para análise estatística, foram utilizados os testes U de Mann-Withney, Wilcoxon e o Smallest Wothwhille Change (SWC. Não foi encontrada diferença entre a mediana dos grupos, porém, o SWC apontou uma possibilidade de 84% de efeito benéfico do treinamento mental sobre o desempenho para até 2 lances livres. Concluiu-se que a imagética motora prévia tem 84% de chance de causar um efeito benéfico sobre o desempenho de lance livre em até 2 arremessos.

  19. El estrés agudo modifica la recuperación y la extinción de la memoria espacial en función de su intensidad

    OpenAIRE

    Cuestas Diana Marcela; Troncoso Julieta

    2007-01-01

    Para evaluar los efectos del estrés agudo por restricción de movimientos sobre la recuperación y la extinción
    de la memoria espacial sin sobreentrenamiento, se utilizaron tres grupos de ratas: control, estrés una hora
    y estrés cuatro horas. Todos los animales fueron entrenados en el laberinto circular de Barnes. El protocolo
    de entrenamiento constaba de ocho ensayos de adquisición (intervalo entre ensayos, IEE; 5 min). Los animales de todos los grupos experime...

  20. Ablación miocárdica septal transluminal percutánea en pacientes con miocardiopatía hipertrófica septal obstructiva: Resultados agudos y seguimiento a 3 años

    OpenAIRE

    Llamas-Esperón,Guillermo A.; Loera Pinales,Armando; Sandoval Navarrete,Santiago; Zamora Muciño,Alberto; Ramírez Robledo,Miguel A.; Varela Ortiz,Samuel; Casas Juárez,Ulices; Fuantos Delgado,María de la Luz; Albarrán Domínguez,Javier; Muñoz Sandoval,Rocío; Sandoval Rodríguez,Eufracino; Ruiz Esparza,M. Eugenia

    2009-01-01

    Objetivo: Reportar los resultados agudos y a largo plazo de la ablación miocárdica septal transluminal percutánea (AMSTP) como tratamiento de la miocardiopatía hipertrófica septal obstructiva (MHSO). La AMSTP se considera una alternativa del tratamiento quirúrgico en pacientes con MHSO y sintomatología refractaria a otras opciones de tratamiento. La respuesta aguda suele ser satisfactoria, pero los resultados a largo plazo no se han descrito de forma suficiente. Métodos: Realizamos AMSTP en 8...

  1. Diferencias en tiempos de incapacidad según el tipo de manejo (convencional o temprano), en pacientes con dolor lumbar agudo secundario a accidentes de trabajo en una aseguradora de riesgos profesionales (ARP) de Bogotá, Colombia

    OpenAIRE

    Cortes Iza, Sandra Catalina; Espinosa Muñoz, Yiseth Andrea; Montenegro Castillo, María Juliana

    2010-01-01

    A lo largo de la historia se ha encontrado que el dolor lumbar agudo es una patología de alta prevalencia y costo, lo ha llevado a varios países a considerarlo un problema de salud pública, Sin embargo ha sido subvalorada y aun no se toman las medidas preventivas lo que aumenta los costos de atención para los servicios de salud y para las empresas es una causa importante de disminución de la producción por días de incapacidad. Con el fin de establecer si el tiempo de inicio y tipo del trat...

  2. Efectividad y seguridad de la laparotomía vs laparoscopía en abdomen agudo de origen gineco-obstétrico causado por embarazo ectópico roto y quiste de ovario roto.

    OpenAIRE

    Luna Aveiga, Cristhian

    2014-01-01

    Comparar efectividad, tiempo y sangrado operatorio, estadía y complicaciones entre laparotomía y laparoscopía en abdomen agudo (AA) por embarazo ectópico roto (EER) y quiste de ovario roto (QOR). Métodos: Estudio retrospectivo en el Hospital de Santa Elena y Clínica Granados de Enero 2010-Diciembre 2011. Se obtuvieron las causas, procedimientos, edad, hemoglobina, edad gestacional, antecedentes personales y complicaciones. Tiempo, sangrado operatorio y estadía fueron comparadas por T de stud...

  3. The angular gamma flux in an iron slab shield

    International Nuclear Information System (INIS)

    Penkuhn, H.

    1975-08-01

    The angular distribution of the photon energy and dose rate flux in a plane iron shield is investigated assuming an isotropic volume source. Near the shield axis (cos phi approximately 1, with phi=angle between shield axis and gamma direction) the angular spectrum is strongly space-dependent. For large phi, space-independent fits are given. Source energies from 0.662 to 6 MeV and penetrations from 6 to 60 cm are treated and the results are compared with a similar investigation on normal concrete. The differences iron-concrete are appreciable only for the lowest source energy

  4. AngularJS yksisivuisen web-applikaation kehitysalustana

    OpenAIRE

    Karhu, Tuomo

    2015-01-01

    Yksisivuiset web-applikaatiot (SPA-sovellukset) ovat yleistyneet viimeisten kymmenen vuoden aikana, ja näiden avulla on ollut mahdollista tuoda verkkosivuston käyttökokemus lähemmäksi aitojen ohjelmasovellusten vastaavaa. Yksisivuisten web-applikaatioitten kehitystyöhön tarkoitetuista sovelluskehyksistä AngularJS on yksi käytetyimmistä ja suosituimmista. Työn tavoitteena on selvittää miten AngularJS-sovelluskehys soveltuu SPA-sivustojen kehitykseen sovelluskehittäjän näkökulmasta, sekä mi...

  5. On angular distribution of nucleus fission fragments by fast neutrons

    International Nuclear Information System (INIS)

    Barabanov, A.L.; Grechukhin, D.P.

    1987-01-01

    Evaluation of amplitudes of quadrupole and hexadecapole components of angular distribution of nucleus fission fragments by neutrons with the energies E n < or approx. 6 MeV is conducted. Stability of this amplitude to permeability optical coefficient variations for neutrons is revealed. It is shown, that the ratio of these amplitudes as well as the character of their dependence on the target nucleus orientation degree are sensitive to the type of fission probability distribution along K projection if fissile nucleus J spin to the fragment scattering axis. This sensitivity may be used for fragment angular distribution anisotropy formation statistical model verification

  6. Gravitomagnetism and angular momenta of black-holes

    OpenAIRE

    Marcelo Samuel Berman

    2007-01-01

    We review the energy contents formulae of Kerr-Newman black-holes, where gravitomagnetic energy term comes into play (Berman 2004, 2006a,b). Then, we obtain the angular momenta formulae, which include the gravitomagnetic effect. Three theorems can be enunciated: (1) No black-hole has its energy confined to its interior; (2) Rotating black-holes do not have confined angular momenta; (3) The energy density of a black-hole is not confined to its interior. The difference between our calculation a...

  7. On the complex angular momentum theory of scattering

    International Nuclear Information System (INIS)

    Thylwe, K.-E.

    1983-01-01

    A contribution to the theory of complex angular momentum techniques in the field of atomic and molecular collisions is given. A new, flexible representation of the scattering amplitude on the basis of realistic assumptions for the behaviour of the S matrix in the complex angular momentum plane is derived. The representation has the form of a sum of steepest-descent integrals, S-matrix residue terms and a symmetry-type background integral. The flexibility is due to the presence of two integer parameters which may be chosen conveniently so as to make the residue sums sufficiently convergent and to minimise the total number of important terms. (author)

  8. Problems of angular momentum projection in nuclear physics

    Energy Technology Data Exchange (ETDEWEB)

    Sorensen, R A [Carnegie-Mellon Univ., Pittsburgh, Pa. (USA)

    1977-05-09

    In nuclear models approximate wave functions are often used which do not have sharp angular momentum as required of the exact wave functions. It seems obvious that model wave functions of this type should be improved by projection onto states of good angular momentum. It is not the purpose of this paper to discuss the technical difficulties of projection (which can be formidable for many particle systems), but rather to present in an elementary way certain fundamental ambiguities in the use of projection. An application to high spin states near the yrast line is suggested.

  9. Gamma-ray angular distribution and correlation measurement. II

    International Nuclear Information System (INIS)

    Twin, P.J.

    1975-01-01

    Angular correlations of γ-rays following nuclear reactions depend, in general, on some alignment of the γ-emitting initial state. The methods of alignment are briefly discussed and then the techniques and experimental methods associated with direct angular distributions, particle-gamma correlations, gamma-gamma correlations and linear polarization correlations are dealt with. Finally the inherent ambiguities which arise when different spin and delta values give identical correlations are discussed for the simple direct and particle-gamma correlations together with the question whether the larger information content of gamma-gamma and linear polarization correlations can resolve these ambiguities. (Auth.)

  10. Angular momentum fuctuation energy in the cranking model

    International Nuclear Information System (INIS)

    Goodman, A.L.

    1979-01-01

    Angular momentum is approximately projected from Hartree-Fock-Bogoliubov cranked (HFBC) wave functions. At each J the projected energy is Esub(proj)approximately Esub(HFBC). The spin-dependent fluctuation ΔJ includes contributions from Jsub(y) and Jsub(z) as well as Jsub(x). There are no correlations in the three angular momentum components. Projected energies are calculated for 168 170 Yb and 174 Hf. When compared to experimental energies, the projected spectra are less compressed than the HFBC spectra. At low spins the projected and experimental energies are in good agreement. (Aut.)

  11. Problems of angular momentum projection in nuclear physics

    International Nuclear Information System (INIS)

    Sorensen, R.A.

    1977-01-01

    In nuclear models approximate wave functions are often used which do not have sharp angular momentum as required of the exact wave functions. It seems obvious that model wave functions of this type should be improved by projection onto states of good angular momentum. It is not the purpose of this paper to discuss the technical difficulties of projection (which can be formidable for many particle systems), but rather to present in an elementary way certain fundamental ambiguities in the use of projection. An application to high spin states near the yrast line is suggested. (Auth.)

  12. Quantitatively measuring the orbital angular momentum density of light : Presentation

    CSIR Research Space (South Africa)

    Dudley, Angela L

    2013-08-01

    Full Text Available the orbital angular momentum density of light Angela Dudleya, Christian Schulzeb, Igor Litvina, Michael Duparréb and Andrew Forbes*a,c,d a CSIR National Laser Centre, PO Box 395, Pretoria 0001, South Africa; b Institute of Applied Optics, Friedrich...., “Generation of high-order Bessel beams by use of an axicon,” Opt. Commun. 177(1-6), 297–301 (2000). [3] Sztul, H. I. and Alfano, R. R., “The Poynting vector and angular momentum of Airy beams,” Opt. Express 16(13), 9411–9416 (2008). [4] Allen, L...

  13. Four Cases of Angular Cheilitis in Orthodontic Patients

    Directory of Open Access Journals (Sweden)

    P Kafaie

    2006-07-01

    Full Text Available Contact dermatitis is an inflammatory reaction of the skin and mucosa to either external or internal factors. It can be divided to two forms of irritant contact dermatitis and allergic contact dermatitis. Nickel is one of the most common materials that causes allergic contact dermatitis and is widely used in orthodontic appliances. The inflammatory reaction to this metal in orthodontics is usually stomatitis and angular cheilitis is very rare. We report 4 cases of angular cheilitis in orthodontic patients and discuss about their causes and treatments.

  14. Equal channel angular pressing of pure aluminium—an analysis

    Indian Academy of Sciences (India)

    Abstract. Equal channel angular pressing (ECAP) is a novel technique for producing ultra fine grain struc- tures in submicron level by introducing a large amount of shear strain into the materials without changing the billet shape or dimensions. This process is well suited for aluminium alloys and is capable of producing ultra.

  15. Gravitational Field of Ultrarelativistic Objects with Angular Momentum

    International Nuclear Information System (INIS)

    Fursaev, Dmitri V

    2006-01-01

    A brief review of recently found gyraton metrics which describe the gravitational field of objects having an angular momentum and moving with the velocity of light is given. The gyraton metrics belong to a class of exact plane wave solutions of four and higher dimensional Einstein equations in vacuum or in the presence of a negative cosmological constant

  16. Modified hydraulic braking system limits angular deceleration to safe values

    Science.gov (United States)

    Briggs, R. S.; Council, M.; Green, P. M.

    1966-01-01

    Conventional spring actuated, hydraulically released, fail-safe disk braking system is modified to control the angular deceleration of a massive antenna. The hydraulic system provides an immediate preset pressure to the spring-loaded brake shoes and holds it at this value to decelerate the antenna at the desired rate.

  17. Obtaining the Electron Angular Momentum Coupling Spectroscopic Terms, jj

    Science.gov (United States)

    Orofino, Hugo; Faria, Roberto B.

    2010-01-01

    A systematic procedure is developed to obtain the electron angular momentum coupling (jj) spectroscopic terms, which is based on building microstates in which each individual electron is placed in a different m[subscript j] "orbital". This approach is similar to that used to obtain the spectroscopic terms under the Russell-Saunders (LS) coupling…

  18. Data visualization with D3 and AngularJS

    CERN Document Server

    Körner, Christoph

    2015-01-01

    If you are a web developer with experience in AngularJS and want to implement interactive visualizations using D3.js, this book is for you. Knowledge of SVG or D3.js will give you an edge to get the most out of this book.

  19. Earth Rotation and Coupling to Changes in Atmospheric Angular Momentum

    Science.gov (United States)

    Rosen, Richard D.; Frey, H. (Technical Monitor)

    2000-01-01

    The research supported under the contract dealt primarily with: (a) the mechanisms responsible for the exchange of angular momentum between the solid Earth and atmosphere; (b) the quality of the data sets used to estimate atmospheric angular momentum; and (c) the ability of these data and of global climate models to detect low-frequency signals in the momentum and, hence, circulation of the atmosphere. Three scientific papers reporting on the results of this research were produced during the course of the contract. These papers identified the particular torques responsible for the peak in atmospheric angular momentum and length-of-day during the 1982-93 El Nino event, and, more generally, the relative roles of torques over land and ocean in explaining the broad spectrum of variability in the length-of-day. In addition, a tendency for interannual variability in atmospheric angular momentum to increase during the last several decades of the 20th century was found in both observations and a global climate model experiment.

  20. Strong eld ionization of naphthalene: angular shifts and molecular potential

    DEFF Research Database (Denmark)

    Dimitrovski, Darko; Maurer, Jochen; Christensen, Lauge

    We analyze the photoelectron momentum distributions from strong eld ionization of xed-in-space naphthalene molecules by circularly polarized laser pulses. By direct comparison between experiment and theory, we show that the angular shifts in the photoelectron momentum distributions are very...... sensitive to the exact form of the molecular potential....

  1. Angular momentum transport with twisted exciton wave packets

    Science.gov (United States)

    Zang, Xiaoning; Lusk, Mark T.

    2017-10-01

    A chain of cofacial molecules with CN or CN h symmetry supports excitonic states with a screwlike structure. These can be quantified with the combination of an axial wave number and an azimuthal winding number. Combinations of these states can be used to construct excitonic wave packets that spiral down the chain with well-determined linear and angular momenta. These twisted exciton wave packets can be created and annihilated using laser pulses, and their angular momentum can be optically modified during transit. This allows for the creation of optoexcitonic circuits in which information, encoded in the angular momentum of light, is converted into excitonic wave packets that can be manipulated, transported, and then reemitted. A tight-binding paradigm is used to demonstrate the key ideas. The approach is then extended to quantify the evolution of twisted exciton wave packets in a many-body, multilevel time-domain density functional theory setting. In both settings, numerical methods are developed that allow the site-to-site transfer of angular momentum to be quantified.

  2. A perturbed angular correlation spectrometer for material science ...

    Indian Academy of Sciences (India)

    A four-detector perturbed angular correlation (PAC) spectrometer has been developed with ultra-fast BaF2 detectors to acquire four coincidence spectra simultaneously, two at 180° and two at 90°. This spectrometer has double efficiency compared to that of a three-detector set-up. Higher efficiency is desirable for PAC ...

  3. a kinematic model for calculating the magnitude of angular ...

    African Journals Online (AJOL)

    BARTH EKWUEME

    material falling into a gravitational source at their centers. Depending ... transportation of angular momentum to outer portion of the accretion ... ∆r1 of the first body is. ∆. ∆. E ... This is the basic action of the accretion disk; energy is released as.

  4. Synchronization of colloidal rotors through angular optical binding

    Czech Academy of Sciences Publication Activity Database

    Simpson, Stephen Hugh; Chvátal, Lukáš; Zemánek, Pavel

    2016-01-01

    Roč. 93, č. 2 (2016), 023842:1-12 ISSN 2469-9926 R&D Projects: GA ČR GB14-36681G Institutional support: RVO:68081731 Keywords : hydrodynamic properties * colloidal rotors * angular optical binding Subject RIV: BH - Optics, Masers, Lasers Impact factor: 2.925, year: 2016

  5. Photofragment angular momentum distribution beyond the axial recoil approximation: Predissociation

    International Nuclear Information System (INIS)

    Kuznetsov, Vladislav V.; Vasyutinskii, Oleg S.

    2007-01-01

    We present the quantum mechanical expressions for the angular momentum distribution of the photofragments produced in slow predissociation. The paper is based on our recent theoretical treatment [J. Chem. Phys. 123, 034307 (2005)] of the recoil angle dependence of the photofragment multipole moments which explicitly treat the role of molecular axis rotation on the electronic angular momentum polarization of the fragments. The electronic wave function of the molecule was used in the adiabatic body frame representation. The rigorous expressions for the fragment state multipoles which have been explicitly derived from the scattering wave function formalism have been used for the case of slow predissociation where a molecule lives in the excited quasibound state much longer than a rotation period. Possible radial nonadiabatic interactions were taken into consideration. The optical excitation of a single rotational branch and the broadband incoherent excitation of all possible rotational branches have been analyzed in detail. The angular momentum polarization of the photofragments has been treated in the high-J limit. The polarization of the photofragment angular momenta predicted by the theory depends on photodissociation mechanism and can in many cases be significant

  6. Cosmology Large Angular Scale Surveyor (CLASS) Focal Plane Development

    Science.gov (United States)

    Chuss, D. T.; Ali, A.; Amiri, M.; Appel, J.; Bennett, C. L.; Colazo, F.; Denis, K. L.; Dunner, R.; Essinger-Hileman, T.; Eimer, J.; hide

    2015-01-01

    The Cosmology Large Angular Scale Surveyor (CLASS) will measure the polarization of the Cosmic Microwave Background to search for and characterize the polarized signature of inflation. CLASS will operate from the Atacama Desert and observe approx.70% of the sky. A variable-delay polarization modulator provides modulation of the polarization at approx.10Hz to suppress the 1/f noise of the atmosphere and enable the measurement of the large angular scale polarization modes. The measurement of the inflationary signal across angular scales that spans both the recombination and reionization features allows a test of the predicted shape of the polarized angular power spectra in addition to a measurement of the energy scale of inflation. CLASS is an array of telescopes covering frequencies of 38, 93, 148, and 217 GHz. These frequencies straddle the foreground minimum and thus allow the extraction of foregrounds from the primordial signal. Each focal plane contains feedhorn-coupled transition-edge sensors that simultaneously detect two orthogonal linear polarizations. The use of single-crystal silicon as the dielectric for the on-chip transmission lines enables both high efficiency and uniformity in fabrication. Integrated band definition has been implemented that both controls the bandpass of the single-mode transmission on the chip and prevents stray light from coupling to the detectors.

  7. Incorporation of resistance to angular leaf spot and bean common ...

    African Journals Online (AJOL)

    Luseko

    2013-07-03

    Jul 3, 2013 ... Angular leaf spot (ALS) caused by the fungus Pseudocercospora griseola and Bean common mosaic and necrosis virus (BCMV/BCMNV) are important diseases of common bean in Tanzania that can cause severe yield reduction when uncontrolled. This study was conducted to incorporate resistant genes ...

  8. THE SIMULATION OF SCATTERING OF ELECTROMAGNETIC WAVES ON ANGULAR STRUCTURES.

    Directory of Open Access Journals (Sweden)

    P. A. Preobrazhensky

    2017-02-01

    Full Text Available The paper discusses the characteristics of scattering of electromagnetic waves on the angular diffraction structures. The solution of the problem is based on the method of integral equations. A comparative analysis of the scattering characteristics of structures with different shape is carried out.

  9. The angular ordering in soft-gluon emission

    International Nuclear Information System (INIS)

    Tesima, K.

    1987-01-01

    The way to evaluate multi-parton cross-sections systematically is discussed. In the leading-double-log approximation in QCD, the successive emission of soft gluons is at successively smaller angles. The angular ordering, however, is violated in the next-to-leading order

  10. Angular anisotropy of the cosmic microwave background radiation

    International Nuclear Information System (INIS)

    Silk, J.

    1982-01-01

    The theory of fluctuations in the cosmic microwave background radiation is reviewed. Anisotropy on large-scale (dipole and quadrupole) and on small scales is discussed. The smoothing effects of secondary ionization (fractional ionization x) are found to be unimportant over an angular scale greater than approx.= 5(OMEGAx)sup(1/3) degrees. (author)

  11. Angular momentum projection of tilted axis rotating states

    Energy Technology Data Exchange (ETDEWEB)

    Oi, M; Onishi, N; Tajima, N [Tokyo Univ. (Japan); Horibata, T

    1998-03-01

    We applied an exact angular momentum projection to three dimensional cranked HFB (3d-CHFB) states. Tilted axis rotating states (TAR) and principal axis rotating states (PAR) are compared. It is shown that TAR is more adequate than PAR for description of the back bending phenomena driven by tilted rotation or wobbling motion. (author)

  12. Exact angular momentum projection based on cranked HFB solution

    Energy Technology Data Exchange (ETDEWEB)

    Enami, Kenichi; Tanabe, Kosai; Yosinaga, Naotaka [Saitama Univ., Urawa (Japan). Dept. of Physics

    1998-03-01

    Exact angular momentum projection of cranked HFB solutions is carried out. It is reconfirmed from this calculation that cranked HFB solutions reproduce the intrinsic structure of deformed nucleus. The result also indicates that the energy correction from projection is important for further investigation of nuclear structure. (author)

  13. Numerical simulation of side heating for controlling angular ...

    Indian Academy of Sciences (India)

    In the present study, a 3-D coupled transient thermal analysis model with auxiliary side heating (parallel heating) is developed to control angular distortion. During analysis, parallel heating flames are placed at several locations from weld line in cross direction. A user defined subroutine is used to apply transient heat source ...

  14. Continuous Variable Entanglement and Squeezing of Orbital Angular Momentum States

    DEFF Research Database (Denmark)

    Lassen, Mikael Østergaard; Leuchs, Gerd; Andersen, Ulrik Lund

    2009-01-01

    We report the first experimental characterization of the first-order continuous variable orbital angular momentum states. Using a spatially nondegenerate optical parametric oscillator (OPO) we produce quadrature entanglement between the two first-order Laguerre-Gauss modes. The family of orbital...

  15. Data compilation of angular distributions of sputtered atoms

    International Nuclear Information System (INIS)

    Yamamura, Yasunori; Takiguchi, Takashi; Tawara, Hiro.

    1990-01-01

    Sputtering on a surface is generally caused by the collision cascade developed near the surface. The process is in principle the same as that causing radiation damage in the bulk of solids. Sputtering has long been regarded as an undesirable dirty effect which destroys the cathodes and grids in gas discharge tubes or ion sources and contaminates plasma and the surrounding walls. However, sputtering is used today for many applications such as sputter ion sources, mass spectrometers and the deposition of thin films. Plasma contamination and the surface erosion of first walls due to sputtering are still the major problems in fusion research. The angular distribution of the particles sputtered from solid surfaces can possibly provide the detailed information on the collision cascade in the interior of targets. This report presents a compilation of the angular distribution of sputtered atoms at normal incidence and oblique incidence in the various combinations of incident ions and target atoms. The angular distribution of sputtered atoms from monatomic solids at normal incidence and oblique incidence, and the compilation of the data on the angular distribution of sputtered atoms are reported. (K.I.)

  16. Angular momentum transport and evolution of lopsided galaxies

    Science.gov (United States)

    Saha, Kanak; Jog, Chanda J.

    2014-10-01

    The surface brightness distribution in the majority of stellar galactic discs falls off exponentially. Often what lies beyond such a stellar disc is the neutral hydrogen gas whose distribution also follows a nearly exponential profile at least for a number of nearby disc galaxies. Both the stars and gas are commonly known to host lopsided asymmetry especially in the outer parts of a galaxy. The role of such asymmetry in the dynamical evolution of a galaxy has not been explored so far. Following Lindblad's original idea of kinematic density waves, we show that the outer part of an exponential disc is ideally suitable for hosting lopsided asymmetry. Further, we compute the transport of angular momentum in the combined stars and gas disc embedded in a dark matter halo. We show that in a pure star and gas disc, there is a transition point where the free precession frequency of a lopsided mode, Ω - κ, changes from retrograde to prograde and this in turn reverses the direction of angular momentum flow in the disc leading to an unphysical behaviour. We show that this problem is overcome in the presence of a dark matter halo, which sets the angular momentum flow outwards as required for disc evolution, provided the lopsidedness is leading in nature. This, plus the well-known angular momentum transport in the inner parts due to spiral arms, can facilitate an inflow of gas from outside perhaps through the cosmic filaments.

  17. Gravitational Field of Ultrarelativistic Objects with Angular Momentum

    Energy Technology Data Exchange (ETDEWEB)

    Fursaev, Dmitri V [Dubna International University and Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141 980, Dubna, Moscow Region (Russian Federation)

    2006-03-01

    A brief review of recently found gyraton metrics which describe the gravitational field of objects having an angular momentum and moving with the velocity of light is given. The gyraton metrics belong to a class of exact plane wave solutions of four and higher dimensional Einstein equations in vacuum or in the presence of a negative cosmological constant.

  18. Angular distribution of protons emitted from the hydrogen plasma focus

    Energy Technology Data Exchange (ETDEWEB)

    Antanasijevic, R.; Maric, Z.; Vukovic, J.; Grabez, B. E-mail: grabez@phy.bg.ac.yu; Djordjevic, D.; Joksimovic, D.; Udovicic, V.; Dragic, A.; Stanojevic, J.; Banjanac, R.; Jokovic, D

    2003-06-01

    Angular distribution of emitted protons was measured. The protons were detected with NTD LR-115 placed at the specially constructed semi-spherical holder, which contains 17 different pinhole cameras. The mechanism of proton acceleration and emission are studied theoretically and experimental results are compared with theoretical predictions.

  19. Angular distribution of protons emitted from the hydrogen plasma focus

    International Nuclear Information System (INIS)

    Antanasijevic, R.; Maric, Z.; Vukovic, J.; Grabez, B.; Djordjevic, D.; Joksimovic, D.; Udovicic, V.; Dragic, A.; Stanojevic, J.; Banjanac, R.; Jokovic, D.

    2003-01-01

    Angular distribution of emitted protons was measured. The protons were detected with NTD LR-115 placed at the specially constructed semi-spherical holder, which contains 17 different pinhole cameras. The mechanism of proton acceleration and emission are studied theoretically and experimental results are compared with theoretical predictions

  20. A new uncertainty relation for angular momentum and angle

    International Nuclear Information System (INIS)

    Kranold, H.U.

    1984-01-01

    An uncertainty relation of the form ΔL 2 ΔSo >=sup(h/2π)/sub(2) is derived for angular momentum and angle. The non-linear operator So measures angles and has a simple interpretation. Subject to very general conditions of rotational invariance the above relation is unique. Radial momentum is not quantized

  1. Angular dependence of EEDF in ion-beam plasma

    International Nuclear Information System (INIS)

    Dudin, S.V.

    1995-01-01

    In a previous paper the results of measurements of electron energy distribution function (EEDF) in ion-beam plasma created by low energy broad ion beam had been presented regardless of the angular dependence of the electron distribution. The present work is specifically aimed towards elucidating the spatial structure of the EEDF in the ion-beam plasma. To solve this problem combination of the techniques of cylindrical probe, large plate probe (5 x 5 mm) and two-grid enegoanalyzer was used. Directional operation of the probes makes possible measurement of angular dependence of electron distribution function which is anisotropic in high energy region. To optimize the construction of the probe-analyzer, experiments with grids were performed, which had different size, mesh, and transparency, under different potentials, and with different distances between grids. Numerical simulation of the analyzer was performed too. It is derived that optimal design for measurements in isotropic plasma is the most plate, thin two-grid probe with maximum angular covering. Investigation of angular dependence of EEDF has shown that the distribution of trapped electrons is completely isotropic, whereas in the energy range of var-epsilon > e var-phi pl (var-phi pl - plasma potential) a strong anisotropy of the EEDF is observed

  2. Search for new physics in dijet mass and angular distributions

    Indian Academy of Sciences (India)

    We present a search for physics beyond the Standard Model in proton–proton collisions at a centre-of-mass energy of s = 7 TeV, performed with the ATLAS detector at the Large Hadron Collider (LHC). No evidence for new physics is found in dijet mass and angular distributions and stringent limits are set on a variety of ...

  3. Incorporation of resistance to angular leaf spot and bean common ...

    African Journals Online (AJOL)

    Angular leaf spot (ALS) caused by the fungus Pseudocercospora griseola and Bean common mosaic and necrosis virus (BCMV/BCMNV) are important diseases of common bean in Tanzania that can cause severe yield reduction when uncontrolled. This study was conducted to incorporate resistant genes for ALS and ...

  4. Type I supernovae and angular anisotropy of the Hubble constant

    International Nuclear Information System (INIS)

    Le Denmat, Gerard; Vigier, J.-P.

    1975-01-01

    The observation of type I supernovae in distant galaxies yields an homogeneous sample of sources to evaluate their true distance. An examination of their distribution in the sky provides a significant confirmation of the angular anisotropy of the Hubble constant already observed by Rubin, Rubin and Ford [fr

  5. AngularJS : yksisivuisen web-sovelluksen käyttöliittymän toteutus AngularJS:llä

    OpenAIRE

    Suomijoki, Juha

    2015-01-01

    Opinnäytetyössä tutkittiin mikä on AngularJS-JavaScript-ohjelmistokehys ja miten se soveltuu yksisivuisen web-sovelluksen käyttöliittymän toteutukseen. AngularJS on vuonna 2012 julkaistu Googlen ylläpitämä JavaScript-ohjelmistokehys, joka on tarkoitettu ensisijaisesti yksisivuisten web-sovellusten kehittämiseen. Opinnäytetyön teoriaosuudessa tutkittiin mikä AngularJS on ja mitkä ovat AngularJS:n keskeiset konseptit ja sovelluskomponentit. Tarkastelu pohjautui AngularJS:stä kirjoitettu...

  6. Bloqueio do plexo braquial, por via infraclavicular vertical, em paciente com doença pulmonar obstrutiva crônica: relato de caso Bloqueo del plexo braquial, por vía infraclavicular vertical, en paciente con enfermedad pulmonar obstructiva crónica: relato de caso Infraclavicular vertical brachial plexus blockade in patients with chronic obstructive pulmonary disease: case report

    Directory of Open Access Journals (Sweden)

    Diogo Brüggemann da Conceição

    2006-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Os pacientes com doença pulmonar obstrutiva crônica (DPOC têm risco aumentado de complicações pós-operatórias, sobretudo quando submetidos à anestesia geral. O bloqueio do plexo braquial representa uma alternativa para estes pacientes em intervenções cirúrgicas de membros superiores. O objetivo deste relato foi apresentar um caso de bloqueio do plexo braquial, por via infraclavicular vertical em paciente com DPOC com fratura de cotovelo. RELATO DO CASO: Paciente do sexo feminino, 67 anos, 52 kg, estado físico ASA III, com indicação de osteossíntese de cotovelo, portadora de bronquiectasias desde nove anos de idade após uma pneumonia. Apresentava tosse produtiva habitualmente, e fora submetida à avaliação de seu pneumologista que a liberou para o procedimento. Após instalação de monitorização com pressão arterial não-invasiva, ECG e oxímetro de pulso, foi realizado bloqueio do plexo braquial por via infraclavicular vertical com 30 mL de ropivacaína a 0,5%. A intervenção cirúrgica foi realizada sem intercorrências. A paciente recebeu alta hospitalar no dia seguinte ao procedimento cirúrgico. CONCLUSÕES: O bloqueio do plexo braquial por via infraclavicular vertical é uma técnica alternativa para portadores de DPOC e fratura de cotovelo, por sua menor morbidade quando comparado com a anestesia geral e com a via supraclavicular.JUSTIFICATIVA Y OBJETIVOS: Los pacientes con enfermedad pulmonar obstructiva crónica (DPOC presentan riesgo mayor de complicaciones postoperatorias especialmente cuando se les someten a la anestesia general. El bloqueo del plexo braquial representa una alternativa para esos pacientes en intervenciones quirúrgicas de miembros superiores. El objetivo de este relato fue el de presentar un caso de bloqueo del plexo braquial, por vía infraclavicular vertical en paciente con DPOC con fractura de codo. RELATO DEL CASO: Paciente del sexo femenino, 67 años, 52 kg

  7. Power calculation of linear and angular incremental encoders

    Science.gov (United States)

    Prokofev, Aleksandr V.; Timofeev, Aleksandr N.; Mednikov, Sergey V.; Sycheva, Elena A.

    2016-04-01

    Automation technology is constantly expanding its role in improving the efficiency of manufacturing and testing processes in all branches of industry. More than ever before, the mechanical movements of linear slides, rotary tables, robot arms, actuators, etc. are numerically controlled. Linear and angular incremental photoelectric encoders measure mechanical motion and transmit the measured values back to the control unit. The capabilities of these systems are undergoing continual development in terms of their resolution, accuracy and reliability, their measuring ranges, and maximum speeds. This article discusses the method of power calculation of linear and angular incremental photoelectric encoders, to find the optimum parameters for its components, such as light emitters, photo-detectors, linear and angular scales, optical components etc. It analyzes methods and devices that permit high resolutions in the order of 0.001 mm or 0.001°, as well as large measuring lengths of over 100 mm. In linear and angular incremental photoelectric encoders optical beam is usually formulated by a condenser lens passes through the measuring unit changes its value depending on the movement of a scanning head or measuring raster. Past light beam is converting into an electrical signal by the photo-detecter's block for processing in the electrical block. Therefore, for calculating the energy source is a value of the desired value of the optical signal at the input of the photo-detecter's block, which reliably recorded and processed in the electronic unit of linear and angular incremental optoelectronic encoders. Automation technology is constantly expanding its role in improving the efficiency of manufacturing and testing processes in all branches of industry. More than ever before, the mechanical movements of linear slides, rotary tables, robot arms, actuators, etc. are numerically controlled. Linear and angular incremental photoelectric encoders measure mechanical motion and

  8. Helicon modes in uniform plasmas. III. Angular momentum

    International Nuclear Information System (INIS)

    Stenzel, R. L.; Urrutia, J. M.

    2015-01-01

    Helicons are electromagnetic waves with helical phase fronts propagating in the whistler mode in magnetized plasmas and solids. They have similar properties to electromagnetic waves with angular momentum in free space. Helicons are circularly polarized waves carrying spin angular momentum and orbital angular momentum due to their propagation around the ambient magnetic field B 0 . These properties have not been considered in the community of researchers working on helicon plasma sources, but are the topic of the present work. The present work focuses on the field topology of helicons in unbounded plasmas, not on helicon source physics. Helicons are excited in a large uniform laboratory plasma with a magnetic loop antenna whose dipole axis is aligned along or across B 0 . The wave fields are measured in orthogonal planes and extended to three dimensions (3D) by interpolation. Since density and B 0 are uniform, small amplitude waves from loops at different locations can be superimposed to generate complex antenna patterns. With a circular array of phase shifted loops, whistler modes with angular and axial wave propagation, i.e., helicons, are generated. Without boundaries radial propagation also arises. The azimuthal mode number m can be positive or negative while the field polarization remains right-hand circular. The conservation of energy and momentum implies that these field quantities are transferred to matter which causes damping or reflection. Wave-particle interactions with fast electrons are possible by Doppler shifted resonances. The transverse Doppler shift is demonstrated. Wave-wave interactions are also shown by showing collisions between different helicons. Whistler turbulence does not always have to be created by nonlinear wave-interactions but can also be a linear superposition of waves from random sources. In helicon collisions, the linear and/or orbital angular momenta can be canceled, which results in a great variety of field topologies. The work

  9. Continuous theta burst stimulation of angular gyrus reduces subjective recollection.

    Directory of Open Access Journals (Sweden)

    Yasemin Yazar

    Full Text Available The contribution of lateral parietal regions such as the angular gyrus to human episodic memory has been the subject of much debate following widespread observations of left parietal activity in healthy volunteers during functional neuroimaging studies of memory retrieval. Patients with lateral parietal lesions are not amnesic, but recent evidence indicates that their memory abilities may not be entirely preserved. Whereas recollection appears intact when objective measures such as source accuracy are used, patients often exhibit reduced subjective confidence in their accurate recollections. When asked to recall autobiographical memories, they may produce spontaneous narratives that lack richness and specificity, but can remember specific details when prompted. Two distinct theoretical accounts have been proposed to explain these results: that the patients have a deficit in the bottom-up capturing of attention by retrieval output, or that they have an impairment in the subjective experience of recollection. The present study aimed to differentiate between these accounts using continuous theta burst stimulation (cTBS in healthy participants to disrupt function of specific left parietal subregions, including angular gyrus. Inconsistent with predictions of the attentional theory, angular gyrus cTBS did not result in greater impairment of free recall than cued recall. Supporting predictions of the subjective recollection account, temporary disruption of angular gyrus was associated with highly accurate source recollection accuracy but a selective reduction in participants' rated source confidence. The findings are consistent with a role for angular gyrus in the integration of memory features into a conscious representation that enables the subjective experience of remembering.

  10. The role of angular momentum conservation law in statistical mechanics

    Directory of Open Access Journals (Sweden)

    I.M. Dubrovskii

    2008-12-01

    Full Text Available Within the limits of Khinchin ideas [A.Y. Khinchin, Mathematical Foundation of Statistical Mechanics. NY, Ed. Dover, 1949] the importance of momentum and angular momentum conservation laws was analyzed for two cases: for uniform magnetic field and when magnetic field is absent. The law of momentum conservation does not change the density of probability distribution in both cases, just as it is assumed in the conventional theory. It is shown that in systems where the kinetic energy depends only on particle momenta canonically conjugated with Cartesian coordinates being their diagonal quadric form,the angular momentum conservation law changes the density of distribution of the system only in case the full angular momentum of a system is not equal to zero. In the gas of charged particles in a uniform magnetic field the density of distribution also varies if the angular momentum is zero [see Dubrovskii I.M., Condensed Matter Physics, 2206, 9, 23]. Two-dimensional gas of charged particles located within a section of an endless strip filled with gas in magnetic field is considered. Under such conditions the angular momentum is not conserved. Directional particle flows take place close to the strip boundaries, and, as a consequence, the phase trajectory of the considered set of particles does not remain within the limited volume of the phase space. In order to apply a statistical thermodynamics method, it was suggested to consider near-boundary trajectories relative to a reference system that moves uniformly. It was shown that if the diameter of an orbit having average thermal energy is much smaller than a strip width, the corrections to thermodynamic functions are small depending on magnetic field. Only the average velocity of near-boundary particles that form near-boundary electric currents creating the paramagnetic moment turn out to be essential.

  11. Cardiomiopatia de Takotsubo: uma causa rara de choque cardiogênico simulando infarto agudo do miocárdio Takotsubo cardiomiopathy: a rare cause of cardiogenic shock simulating acute myocardial infarction

    Directory of Open Access Journals (Sweden)

    Jayro Thadeu Paiva de Vasconcelos

    2005-08-01

    Full Text Available Cardiomiopatia de Takotsubo é uma causa rara de aneurisma ventricular esquerdo agudo, na ausência de coronariopatia, só recentemente descrita na literatura mundial. Os sintomas podem assemelhar-se aos do infarto agudo do miocárdio com dor torácica típica. A imagem do balonamento ventricular sugestivo de haltere ou "Takotsubo" (dispositivo utilizado no Japão para prender Octopus é característico desta nova síndrome e usualmente há desaparecimento do movimento discinético até o 18º dia do início dos sintomas, em média.Takotsubo Cardiomiopathy is a rare cause of acute left ventricular aneurysm, in the absence of coronariopathy, only recently described in world literature. Symptoms may be similar to those from acute myocardial infarction with typical thoracic pain. The image of dumbbell or Takotsubo (a device used in Japan to capture octopus suggestive ventricular ballooning is characteristic of that new syndrome and there is usually the disappearing of dyskinetic movement up to the 18th day from the beginning of the symptoms, in average.

  12. Apendicitis epiploica. Causa poco común de abdomen agudo en niños. Presentación de un caso y revisión de la literatura

    Directory of Open Access Journals (Sweden)

    SA Solórzano-Morales

    2016-04-01

    requiere tratamiento con analgésicos. La mayoría de los casos han sido descritos en pacientes adultos; sin embargo, el caso que presentamos es el segundo diagnosticado en el Instituto Nacional de Pediatría.   CASO CLÍNICO: niño de 9 años con diagnóstico clínico presuntivo de apendicitis, se diagnosticó por ultrasonido y tomografía computada como apendicitis epiploica, lo que se corroboró en la pieza anatomopatológica.   CONCLUSIONES: nuestro propósito es describir la apendicitis epiploica en niños como causa de abdomen agudo, así como los hallazgos clínicos, ultrasonográficos, de tomografía computada e histopatológicos de esta patología como causa rara de abdomen agudo. Es importante que se conozca el valor de los estudios de imagen de esta entidad a fin de evitar tratamientos invasivos innecesarios.

  13. Escore TIMI no infarto agudo do miocárdio conforme níveis de estratificação de prognóstico Score TIMI en el infarto agudo de miocardio según niveles de estratificación de pronóstico TIMI risk score for acute myocardial infarction according to prognostic stratification

    Directory of Open Access Journals (Sweden)

    Jaqueline Locks Pereira

    2009-08-01

    Full Text Available FUNDAMENTO: O escore de risco TIMI (thrombolysis in myocardial infarction é derivado de ensaio clínico envolvendo pacientes elegíveis para fibrinólise. Como o perfil de risco desses casos difere do encontrado em populações não selecionadas, é importante que se analise a aplicabilidade do escore em condições clínicas habituais. OBJETIVO: Avaliar o manejo e a evolução hospitalar de pacientes internados com infarto agudo do miocárdio conforme estratificação de risco pelo escore TIMI. MÉTODOS: Foram avaliados, retrospectivamente, 103 casos de infarto agudo do miocárdio com supradesnivelamento do segmento ST, admitidos no Hospital Nossa Senhora da Conceição, em Tubarão, nos anos de 2004 e 2005. Os casos foram analisados em três grupos de risco de acordo com o escore TIMI. RESULTADOS: A mortalidade hospitalar pós-infarto foi de 17,5%. No grupo de baixo risco não houve óbito. A mortalidade foi de 8,1% no grupo de médio risco e de 55,6% no de alto risco. O risco de morte para casos de alto risco foi 14,1 vezes maior em relação aos casos de médio e baixo risco (IC95% = 4,4 a 44,1 e pFUNDAMENTO: El score de riesgo TIMI (thrombolysis in myocardial infarction se derivó de ensayo clínico que implicó a pacientes elegibles para fibrinólisis. Como el perfil de riesgo de esos casos difiere del encontrado en poblaciones no seleccionadas, es importante que se analice la aplicabilidad del score en condiciones clínicas habituales. OBJETIVO: Evaluar el manejo y la evolución hospitalaria de pacientes internados con infarto agudo de miocardio de acuerdo con la estratificación de riesgo mediante la puntuación TIMI. MÉTODOS: Se evaluaron, retrospectivamente, 103 casos de infarto agudo de miocardio con supradesnivelamiento del segmento ST, ingresados en el Hospital Nossa Senhora da Conceição, en Tubarão, en los años de 2004 y 2005. Se analizaron los casos en tres grupos de riesgo según el score TIMI. RESULTADOS: La mortalidad

  14. Bloqueio bilateral do nervo pudendo para hemorroidectomia em paciente acondroplásico: relato de caso Bloqueo bilateral del nervio pudendo para hemorroidectomía en paciente acondroplásico: relato de caso Bilateral blockade of the pudend nerve to hemorrhoidectomy in achondroplasic patient: case report

    Directory of Open Access Journals (Sweden)

    Bruno Salomé de Morais

    2006-04-01

    ética espontánea. La anestesia de esos pacientes presenta varias particularidades. El objetivo del presente relato fue el de describir un caso de paciente acondroplásico, con previo historial de intervención quirúrgica de la columna para descompresión medular, sometido a Hemorroidectomía a través de bloqueo bilateral de los nervios pudendos. RELATO DEL CASO: Paciente del sexo masculino, 47 años, acondroplásico, que fue ingresado para la realización de hemorroidectomía.Al hacérsele el examen físico presentaba el cuello acortado con extensión limitada de la cabeza, Mallampati clase IV, distancia tireomentoniana de 6 cm y abertura de la boca de 3,5 cm. La columna vertebral presentaba cifosis torácica y lordosis lumbar acentuada, además de cicatriz quirúrgica en la región lumbar. Fue realizado el bloqueo bilateral de los nervios pudendos con ropivacaina a 1%, por vía transperineal, con una aguja aislada de 0,8 mm x 100 mm 21G (Stimuplex A100 BBraun, Melsungen, Germany conectada al estimulador de nervios periféricos (Stimuplex-DIG, BBraun.El paciente fue colocado en decúbito ventral y la cirugía iniciada después de 15 minutos da administración del anestésico. Durante todo el procedimiento, el paciente permaneció consciente y no relató ningún dolor o incomodidad. Hasta el momento del alta hospitalaria (22h después de la realización del bloqueo, el paciente no refirió dolor, incomodidad, náusea, vómito, bloqueo motor, retención o incontinencia urinaria. Después del alta, evolucionó bien presentando evacuación después de 31 horas de efectuada la cirugía. CONCLUSIONES: El caso mostró el uso del bloqueo bilateral de los nervios pudendos, con el auxilio del neuroestimulador como técnica anestésica aislada para la hemorroidectomía.BACKGROUND AND OBJECTIVES: The achondroplasic dwarfism or achondroplasia is the most common form of dwarfism and occurs, in most of the cases, as a result of spontaneous genetic alteration. The anesthesia in these

  15. Frame dependence of spin-one angular conditions in light front dynamics

    International Nuclear Information System (INIS)

    Bakker, Bernard L. G.; Ji Chuengryong

    2002-01-01

    We elaborate the frame dependence of the angular conditions for spin-1 form factors. An extra angular condition is found in addition to the usual angular condition relating the four helicity amplitudes. Investigating the frame dependence of angular conditions, we find that the extra angular condition is in general as complicated as the usual one, although it becomes very simple in the q + =0 frame involving only two helicity amplitudes. It is confirmed that the angular conditions are identical in frames that are connected by kinematical transformations. The high-Q 2 behavior of the physical form factors and the limiting behavior in special reference frames are also discussed

  16. A diferenciação da dor do infarto agudo do miocárdio entre pacientes diabéticos e não-diabéticos Diferenciación del dolor del infarto agudo de miocardio entre pacientes diabéticos y no diabéticos The difference in acute myocardial infarction pain between diabetic and non diabetic patients

    Directory of Open Access Journals (Sweden)

    Leandra de Gouveia Pacheco Gondim

    2003-12-01

    Full Text Available O estudo teve como objetivo comparar a dor do infarto agudo do miocárdio (IAM entre pacientes diabéticos e não-diabéticos. Uma amostra de 80 pacientes com IAM, divididos em 2 grupos com e sem diabetes mellitus (DM, sendo 29% diabéticos e 71% não-diabéticos. Os pacientes com DM referiram ausência de dor (pEl objetivo de este estudio fue comparar el dolor del infarto agudo de miocardio (IAM entre pacientes diabéticos y no diabéticos. La muestra la conformaron 80 pacientes con IAM divididos en dos grupos: con y sin diabetes mellitus (DM, siendo el 29% diabéticos y el 71% no diabéticos. Los pacientes con DM manifestaron ausencia de dolor (pThe goal of this study was to compare the acute myocardial infarction (AMI pain between diabetic and non diabetic patients. A sample of 80 AMI patients was divided in two groups, with and without diabetes mellitus (DM, being 29% diabetic and 71% non diabetic patients. The patients with DM said they had no pain (p<0.05 and gave lower scores for pain when compared with patients without DM. There was a significant difference between average scores for pain among diabetic and non diabetic patients (p<0.001. In conclusion, the diabetic patients presented no pain or diminished pain when compared with patients without diabetes.

  17. EL ESTRÉS AGUDO INTERFIERE CON LA EVOCACIÓN Y PROMUEVE LA EXTINCIÓN DE LA MEMORIA ESPACIAL EN EL LABERINTO DE BARNES

    Directory of Open Access Journals (Sweden)

    Julieta Troncoso

    2010-01-01

    Full Text Available Para evaluar los efectos del estrés agudo sobre la recuperación y la extinción de la memoria espacial, se utilizaron ratas entrenadas en el laberinto circular de Barnes. El entrenamiento consistió de 8 ensayos de adquisición (intervalo entre ensayos, IEE, de 5 min en donde los animales debían aprender a encontrar una caja meta ubicada en uno de los 18 agujeros del laberinto. Todos los animales adquirieron el aprendizaje espacial, ya que invirtieron menos tiempo en encontrar la caja meta y cometieron menos errores a medida que se sucedían los ensayos de entrenamiento. Veinticuatro horas después del entrenamiento se evaluó la retención y extinción del aprendizaje espacial mediante una prueba con caja meta (PCC seguida de siete pruebas sin caja (PSC, con un IEE de 5 min. Una hora y media antes de la sesión de evaluación de la memoria un grupo de animales fue sometido a estrés por restricción de movimientos durante una hora, permitiéndoles un período de recuperación de 30 min y otro grupo permaneció en su caja hogar sin manipulación (control. Los resultados indican que el estrés deteriora el proceso de evocación de la memoria espacial, ya que los animales estresados cometieron un mayor número de errores y demoraron más tiempo en encontrar la caja meta durante la PCC, respecto de los controles. Además, el estrés facilita el proceso de extinción, ya que, durante las PSCs los animales estresados no mostraron una persistencia en la exploración del agujero que, en el entrenamiento, conducía a la caja meta.

  18. Efeitos agudos de diferentes métodos de treinamento com pesos sobre o gasto energético em homens treinados

    Directory of Open Access Journals (Sweden)

    Rodrigo Ramalho Aniceto

    2013-06-01

    Full Text Available INTRODUÇÃO: O treinamento com pesos vem sendo amplamente utilizado como estratégia de controle e redução ponderal, assim o gasto energético (GE contribui de forma significativa para este processo. OBJETIVO: Comparar os efeitos agudos do método circuito (MC com o método tradicional (MT sobre o GE. MÉTODOS: Trata-se de uma pesquisa com delineamento crossover e aleatorizado, a amostra foi composta por 10 homens adultos treinados com idade entre 18 e 29 anos. Foram realizadas duas sessões experimentais com wash out de sete dias: no MC os exercícios foram realizados alternados por segmento em forma de estações, durante o MT os exercícios foram realizados em séries consecutivas. Ambos os métodos seguiram a mesma sequência de oito exercícios com o mesmo trabalho total: 60% de 1RM, 24 séries/estações e 10 repetições. O lactato sanguíneo foi coletado em repouso e a cada três séries/estações. O ar expirado foi coletado por 30 minutos antes e ~31 minutos durante todas as sessões de treinamento. O GE aeróbio de exercício (GEAE, kj e do intervalo de recuperação (GEAIR, kj foram estimados pela calorimetria indireta através da medida do consumo de oxigênio e o GE anaeróbio (GEA, kj pela concentração de lactato sanguíneo ([La]. O GE total (GET, kj foi registrado pelo somatório do GEA, GEAE e GEAIR. RESULTADOS: Os dados demonstraram que o GEA foi maior no MT do que o MC, no entanto, o GEAE, GEAIR e o GET não foram diferentes significativamente entre os métodos. O MT apresentou maior [La] do que o MC. CONCLUSÃO: Conclui-se que o MC e o MT produzem similar GET, contudo, percebe-se que o MT utiliza mais a via anaeróbia do que o MC.

  19. Modelo experimental de trauma medular agudo produzido por aparelho estereotáxico modificado Experimental model of acute spinal cord injury produced by modified steriotaxic equipment

    Directory of Open Access Journals (Sweden)

    B.B.J. Torres

    2010-02-01

    Full Text Available Foram utilizados 55 ratos machos da espécie Rattus novergicus, variedade Wistar, com o objetivo de propor um modelo experimental de trauma medular produzido por aparelho estereotáxico modificado, capaz de reproduzir clinicamente lesões medulares padronizadas. Após realização de laminectomia dorsal de T13, utilizou-se peso compressivo de 50,5g (25 animais - grupo I ou 70,5g (30 animais - grupo II, durante cinco minutos, comprimindo a medula espinhal. Os animais foram assistidos durante oito dias, por meio de testes comportamentais para avaliar a sensibilidade dolorosa, a capacidade motora, o posicionamento tátil e proprioceptivo e a capacidade de manter-se em plano inclinado. No grupo I, observaram-se déficits neurológicos moderados e transitórios, que variaram entre os animais. No grupo II, foi possível obter um trauma padronizado, caracterizado por paraplegia bilateral e simétrica dos membros posteriores, perda de propriocepção e da sensibilidade dolorosa de todos os animais. A utilização do aparelho estereotáxico desenvolvido permite reproduzir clinicamente trauma medular padronizado em ratos, de maneira simples, econômica e satisfatória, o que poderá proporcionar avanços nas investigações terapêuticas, abrangendo doenças neurodegenerativas, como é o caso do trauma medular agudo.Fifty-five male rats (Rattus novergicus, Wistar variety, were used with the purpose of suggesting an experimental model of spinal cord trauma performed by using a modified stereotaxic equipment capable to reproduce clinically (standardized pattern spinal cord injury. After dorsal laminectomy of T13, a compression was performed with 50.5g (25 animals - group I or 70.5g (30 animals - group II during five minutes on spinal cord. The animals were assisted during eight days by behavioral tests to evaluate painful sensibility, motor capacity, proprioceptive and tactil placing, and stability on inclined plan. In the group I, moderate and transitory

  20. ANESTESIA PARA AMPUTACIÓN SUPRACONDÍLEA EN PACIENTE CON SÍNDROME CORONARIO AGUDO / Anesthesia for supracondylar amputation in patient with acute coronary syndrome

    Directory of Open Access Journals (Sweden)

    Marilyn Ramírez Méndez

    2012-03-01

    Full Text Available Resumen La insuficiencia arterial periférica es una enfermedad que se asocia a factores de riesgo aterogénico reconocidos, y es más frecuente en personas con hiperlipidemia, diabetes mellitus y hábito de fumar. Se presenta el caso de una mujer de 67 años de edad, con antecedentes de hipertensión arterial, diabetes mellitus e infarto de miocardio antiguo, que ingresa por signos de inflamación aguda del miembro inferior derecho como consecuencia de una insuficiencia arterial periférica. A los 8 días del ingreso presentó un síndrome coronario agudo sin elevación del segmento ST, con fallo de bomba Killip II, y una vez compensada fue anunciada para amputación supracondílea de urgencia, debido a una gangrena isquémica. Se decidió utilizar anestesia espinal subaracnoidea selectiva del miembro inferior derecho, a cual se aplicó sin complicaciones y favoreció el adecuado desarrollo de la cirugía planificada. A las 72 horas la paciente fue egresada de la UCI, sin síntomas cardiovasculares y compensación metabólica. / Abstract Peripheral arterial insufficiency is a disease that is associated with known atherogenic risk factors, and is more common in people with hyperlipidemia, diabetes mellitus and smoking habit. A case of a 67-year-old woman with a history of hypertension, diabetes mellitus and old myocardial infarction is presented. She was admitted for signs of acute inflammation of the right leg due to peripheral arterial insufficiency. 8 days after admission she presented an acute coronary syndrome without ST segment elevation with pump failure (Killip class II, and once compensated she was scheduled for emergency supracondylar amputation due to ischemic gangrene. It was decided to use selective spinal subarachnoid from the right leg, which was applied without complications and favored the proper development of the planned surgery. At 72 hours, the patient was discharged from the ICU, with metabolic compensation and without

  1. Efeito agudo dos extensores do joelho unilateral na cadeira extensora com e sem estímulos na plataforma vibratória

    Directory of Open Access Journals (Sweden)

    Fernando Roberto Ferreira

    2013-10-01

    Full Text Available INTRODUÇÃO: Nos últimos anos muitos estudos foram feitos com o objetivo de avaliar a utilização da vibração mecânica como parte de treinamento para melhora do condicionamento físico. Entretanto, a maioria avaliou os efeitos dos exercícios em conjunto com o treinamento vibratório para determinar se havia melhora após o treinamento, sem avaliar os efeitos dos exercícios realizados na plataforma com e sem vibração. OBJETIVO: Avaliar o efeito agudo do exercício nos extensores do joelho, com e sem o estímulo da plataforma vibratória. MÉTODOS: Trinta indivíduos ativos, do sexo masculino, com idades entre 18 e 45 anos, realizaram, de forma randomizada, três protocolos: grupo plataforma ligada (GPL, grupo plataforma desligada (GPD e grupo controle (GC. Cada protocolo começava com aquecimento de cinco minutos em bicicleta ergométrica, com carga entre 75 e 100 watts e 70 rotações por minuto, seguido por seis séries de 10 movimentos de agachamento unilateral com intervalo de um minuto entre elas, com ou sem vibração mecânica, e terminava com o Work Test, realizado apenas no membro inferior dominante para determinação das valências físicas: trabalho, força, potência e velocidade. O grupo controle realizou apenas o Work Test após o aquecimento. RESULTADOS: Apenas a variável velocidade apresentou diferença estatisticamente significante (p < 0,05 quando comparado o GPL ao GC. CONCLUSÃO: O estímulo na plataforma vibratória não exerceu influência nas variáveis trabalho e potência dos extensores do joelho unilateral, mas, na velocidade do movimento, exerceu influência negativa causando fadiga.

  2. Implantação da linha de cuidado do infarto agudo do miocárdio no município de Belo Horizonte

    Directory of Open Access Journals (Sweden)

    Milena Soriano Marcolino

    2013-04-01

    Full Text Available FUNDAMENTO: A criação de sistemas ou linhas de cuidado ao infarto agudo do miocárdio (IAM tem o objetivo de otimizar o atendimento ao paciente, desde o diagnóstico precoce até o tratamento adequado e em tempo hábil. OBJETIVO: Avaliar a implantação da linha de cuidado do IAM, em Belo Horizonte, Minas Gerais, e seu impacto na mortalidade hospitalar por IAM. MÉTODOS: A linha de cuidado do IAM foi implantada em Belo Horizonte entre 2010 e 2011 com intuito de ampliar o acesso dos pacientes do sistema público de saúde ao tratamento preconizado pelas diretrizes vigentes. As equipes das unidades de pronto atendimento foram treinadas e foi implantado sistema de tele-eletrocardiografia nessas unidades. Os desfechos primários deste estudo observacional retrospectivo foram o número de internações e a mortalidade hospitalar por IAM, de 2009 a 2011. RESULTADOS: No período avaliado, 294 profissionais foram treinados e 563 ECGs foram transmitidos das unidades de pronto atendimento para as unidades coronarianas. Houve redução importante da taxa de mortalidade hospitalar (12,3% em 2009 versus 7,1% em 2011, p < 0,001, enquanto o número de internações por IAM permaneceu estável. Ocorreu aumento do custo médio de internação (média R$ 2.480,00 versus R$ 3.501,00, p < 0,001, aumento da proporção de internações contemplando diárias de terapia intensiva (32,4% em 2009 versus 66,1% em 2011, p < 0,001 e de pacientes internados em hospitais de alta complexidade (47,0% versus 69,6%, p < 0,001. CONCLUSÃO: A implantação da linha de cuidado do IAM permitiu maior acesso da população ao tratamento adequado e, consequentemente, redução na mortalidade hospitalar por IAM.

  3. Efeitos agudos no desempenho do salto vertical após o agachamento com banda elástica de joelho

    Directory of Open Access Journals (Sweden)

    Willy Andrade Gomes

    2015-08-01

    Full Text Available INTRODUÇÃO: A banda elástica pode afetar o desempenho durante exercícios de alta intensidade, reduzindo a ativação muscular, o que pode influenciar o efeito de potencialização pós-ativação, que depende de alta intensidade para o exercício subsequente que visa potência. Objetivo: Verificar os efeitos agudos no desempenho do salto com contramovimento (SCM após o agachamento em alta intensidade com e sem o uso da banda elástica de joelhos em sujeitos treinados em força.MÉTODOS: Participaram do estudo 14 homens (idade: 24 ± 4 anos, estatura: 176 ± 6 cm, massa corporal: 81 ± 11 kg, 1RM: 107 ± 30 kgf, treinados em força (>3 anos. Foram realizados três SCM antes e após três meio-agachamentos a 90% de 1RM nas condições com e sem a banda elástica de joelhos. Durante o SCM foram avaliados ativação muscular (IEMG do vasto lateral (VL, glúteo máximo (GM, tempo de salto (TS e impulso (IMP por meio da força vertical de reação do solo (FRSv.RESULTADOS: Os resultados mostraram que para o TS foi verificada diferença significante entre as condições pós-meio-agachamento (com e sem banda (P= 0,044, TE = 1,02, sendo que os maiores valores foram observados para a condição sem banda. Para a IEMG de VL foi verificada diferença significante entre as condições pré e pós o meio-agachamento (com banda (P= 0,029, TE = 1,68, sendo que os maiores valores foram observados para a IEMG com banda. Para a IEMG de GM e para o IMP não foram verificadas diferenças significantes entre as condições.CONCLUSÃO: Após a utilização da banda elástica de joelhos durante o exercício agachamento, ocorreu uma redução na participação do vasto lateral durante o salto com contramovimento, afetando o tempo de contato, mas não a produção de impulso, e consequente desempenho.

  4. Tratamiento del episodio agudo de asma bronquial en los servicios de urgencias pediátricos: Guía clínica práctica Treatment of the acute episode of bronchial asthma at the pediatric emergency services: Practical clinical guide

    Directory of Open Access Journals (Sweden)

    Roberto Razón Behar

    2005-12-01

    Full Text Available Por lo general, no existe una sistematización para clasificar y tratar el episodio agudo de asma bronquial ni para evaluar la evolución de los pacientes. Se realizó un estudio en 142 pacientes de 6 a 15 años de edad, que presentaron episodios agudos de asma bronquial y acudieron a los servicios de urgencias de los Hospitales Pediátricos «William Soler» y «Leonor Pérez», y del Policlínico «Federico Capdevila». A estos pacientes se les aplicó una guía clínica práctica, que incluyó la clasificación de la severidad del episodio agudo y un esquema de tratamiento, basado en la utilización de oxígeno, broncodilatadores inhalados y esteroides orales. Durante el tratamiento, los pacientes se evaluaron con periodicidad. La respuesta al tratamiento fue buena en la mayoría de los casos y el resultado final fue el egreso domiciliario. Ocho de los pacientes requirieron ingreso hospitalario por respuestas al tratamiento incompletas o pobres. La atención del episodio agudo de asma bronquial puede mejorarse con el uso de guías clínicas prácticas de diagnóstico y tratamiento.

  5. Angular evolution of peripheral heavy ion reactions at intermediate energies

    International Nuclear Information System (INIS)

    Blumenfeld, Y.; Chomaz, P.; Frascaria, N.; Garron, J.P.; Jacmart, J.C; Roynette, J.C

    1985-01-01

    Energy spectra and angular distributions of projectile-like fragments have been measured in the vicinity of the grazing angle for the 40 Ar+ 40 Ca and 40 Ar+ 208 Pb reactions at 44MeV/nucleon. Measurements of the 40 Ar+ 40 Ca system at 27MeV/nucleon and 20 Ne+ 208 Pb reaction at 44MeV/nucleon at one angle have also been performed. For fragments with charge and mass close to the projectile numerous deviations from the standard fragmentation model have been observed including rapidly changing shapes of the angular distributions with the fragment mass. Moreover the isotopic distributions and mean fragment velocities are strongly dependent on detection angle. A surface transfer reaction component dominant at the grazing angle can be separated from a second component which cannot be entirely accounted for by a simple fragmentation mechanism

  6. Angular dependence of the exchange bias for the bistable state

    Energy Technology Data Exchange (ETDEWEB)

    Bai, Yuhao [College of Physics and Electronic Information, Shanxi Normal University, Linfen 041004 (China); Research College of materials science, Shanxi Normal University, Linfen 041004 (China); Xu, Xiaohong, E-mail: xuxh@dns.sxnu.edu.cn [Research College of materials science, Shanxi Normal University, Linfen 041004 (China); Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, Shanxi Normal University, Linfen 041004 (China)

    2017-06-15

    The angular dependence of the exchange bias (ADEB) has been investigated in detail when the exchange-coupled ferromagnetic (FM)/antiferromagnetic (AFM) bilayer is in the bistable state. Complete and incomplete jump phenomena were found at the intrinsic easy and hard axes, when they pass through two special positions making the angular deviation of 58.2826° and 121.7174° from the easy axis of the uniaxial anisotropy, respectively. The combination of these different types of the jump phenomena at the intrinsic easy and hard axes yields five distinct types of the ADEB. The physical condition for each type of ADEB is established. Additionally, the extreme value problem of the exchange bias field and coercivity are also discussed, which is an important technological issue in the design of the magnetoresistive and spintronic devices. These results enable us to make a comprehensive understanding of the experimental ADEB curves.

  7. Angular diameters of Magellanic Cloud plantary nebulae. I. Speckle interferometry

    International Nuclear Information System (INIS)

    Wood, P.R.; Bessell, M.S.; Dopita, M.A.

    1986-01-01

    Speckle interferometric angular diameters of Magellanic Cloud planetary nebulae are presented. The mass of ionized gas in each nebula has been derived from the angular diameter and published H-beta line fluxes; the derives masses range from less than 0.006 to more than 0.19 solar mass. The planetary nebulae observed were the brightest in the Magellanic Clouds; consequently, they are all relatively small, young, bright, and dense. They are almost certainly only partially ionized, so that the masses derived for the ionized parts of the nebula are lower limits to the total nebula mass. The properties of the Magellanic Cloud nebulae are compared with those of planetary nebulae at the galactic center. 27 references

  8. Angular distribution in proton-hydrogen charge-transfer collisions

    International Nuclear Information System (INIS)

    Glembocki, O.; Halpern, A.M.

    1977-01-01

    Theoretical angular distributions for p-H charge transfer to the 1s state for energies of 1 keV and above have been examined and compared for three approximation schemes: the plane-wave Born approximation of Jackson and Schiff (JS), the Coulomb projected Born approximation of Geltman (G), and the distorted-wave eikonal approximation of one of the authors (D). The sharp dip in the forward distribution characteristic of JS is found to exist in G and D as well. As expected, G and D give identical results for all but the lowest energies. In the cases of G and D the dip, which is located close to that of JS, disappears and then reappears as the energy rises. Analytic high-energy limits for the angular dependence in both the JS and G cases have been found and are discussed

  9. On the observability of the quark orbital angular momentum distribution

    Energy Technology Data Exchange (ETDEWEB)

    Courtoy, Aurore, E-mail: aurore.courtoy@ulg.be [IFPA, AGO Department, Université de Liège, Bât. B5, Sart Tilman, B-4000 Liège (Belgium); Laboratori Nazionali di Frascati, INFN, Frascati (Italy); Goldstein, Gary R., E-mail: gary.goldstein@tufts.edu [Department of Physics and Astronomy, Tufts University, Medford, MA 02155 (United States); Osvaldo Gonzalez Hernandez, J., E-mail: jog4m@virginia.edu [Istituto Nazionale di Fisica Nucleare (INFN) – Sezione di Torino, via P. Giuria, 1, 10125 Torino (Italy); Liuti, Simonetta, E-mail: sl4y@virginia.edu [University of Virginia – Physics Department, 382 McCormick Rd., Charlottesville, VA 22904 (United States); Laboratori Nazionali di Frascati, INFN, Frascati (Italy); Rajan, Abha, E-mail: ar5xc@virginia.edu [University of Virginia – Physics Department, 382 McCormick Rd., Charlottesville, VA 22904 (United States)

    2014-04-04

    We argue that due to parity constraints, the helicity combination of the purely momentum space counterparts of the Wigner distributions – the generalized transverse momentum distributions – that describes the configuration of an unpolarized quark in a longitudinally polarized nucleon can enter the deeply virtual Compton scattering amplitude only through matrix elements involving a final state interaction. The relevant matrix elements in turn involve light-cone operators projections in the transverse direction, or they appear in the deeply virtual Compton scattering amplitude at twist three. Orbital angular momentum or the spin structure of the nucleon was a major reason for these various distributions and amplitudes to have been introduced. We show that the twist three contributions associated with orbital angular momentum are related to the target-spin asymmetry in deeply virtual Compton scattering, already measured at HERMES.

  10. Angular resolution of the gaseous micro-pixel detector Gossip

    Science.gov (United States)

    Bilevych, Y.; Blanco Carballo, V.; van Dijk, M.; Fransen, M.; van der Graaf, H.; Hartjes, F.; Hessey, N.; Koppert, W.; Nauta, S.; Rogers, M.; Romaniouk, A.; Veenhof, R.

    2011-06-01

    Gossip is a gaseous micro-pixel detector with a very thin drift gap intended for a high rate environment like at the pixel layers of ATLAS at the sLHC. The detector outputs not only the crossing point of a traversing MIP, but also the angle of the track, thus greatly simplifying track reconstruction. In this paper we describe a testbeam experiment to examine the angular resolution of the reconstructed track segments in Gossip. We used here the low diffusion gas mixture DME/CO 2 50/50. An angular resolution of 20 mrad for perpendicular tracks could be obtained from a 1.5 mm thin drift volume. However, for the prototype detector used at the testbeam experiment, the resolution of slanting tracks was worsened by poor time resolution of the pixel chip used.

  11. Angular resolution of the gaseous micro-pixel detector Gossip

    Energy Technology Data Exchange (ETDEWEB)

    Bilevych, Y.; Blanco Carballo, V.; Dijk, M. van; Fransen, M.; Graaf, H. van der; Hartjes, F.; Hessey, N.; Koppert, W.; Nauta, S. [Nikhef, P.O. Box 41882, 1009 DB Amsterdam (Netherlands); Rogers, M. [Radboud University, P.O. Box 9102, 6500HC Nijmegen (Netherlands); Romaniouk, A.; Veenhof, R. [CERN, CH-1211, Geneve 23 (Switzerland)

    2011-06-15

    Gossip is a gaseous micro-pixel detector with a very thin drift gap intended for a high rate environment like at the pixel layers of ATLAS at the sLHC. The detector outputs not only the crossing point of a traversing MIP, but also the angle of the track, thus greatly simplifying track reconstruction. In this paper we describe a testbeam experiment to examine the angular resolution of the reconstructed track segments in Gossip. We used here the low diffusion gas mixture DME/CO{sub 2} 50/50. An angular resolution of 20 mrad for perpendicular tracks could be obtained from a 1.5 mm thin drift volume. However, for the prototype detector used at the testbeam experiment, the resolution of slanting tracks was worsened by poor time resolution of the pixel chip used.

  12. Angular resolution of the gaseous micro-pixel detector Gossip

    International Nuclear Information System (INIS)

    Bilevych, Y.; Blanco Carballo, V.; Dijk, M. van; Fransen, M.; Graaf, H. van der; Hartjes, F.; Hessey, N.; Koppert, W.; Nauta, S.; Rogers, M.; Romaniouk, A.; Veenhof, R.

    2011-01-01

    Gossip is a gaseous micro-pixel detector with a very thin drift gap intended for a high rate environment like at the pixel layers of ATLAS at the sLHC. The detector outputs not only the crossing point of a traversing MIP, but also the angle of the track, thus greatly simplifying track reconstruction. In this paper we describe a testbeam experiment to examine the angular resolution of the reconstructed track segments in Gossip. We used here the low diffusion gas mixture DME/CO 2 50/50. An angular resolution of 20 mrad for perpendicular tracks could be obtained from a 1.5 mm thin drift volume. However, for the prototype detector used at the testbeam experiment, the resolution of slanting tracks was worsened by poor time resolution of the pixel chip used.

  13. Cosmological forecasts from photometric measurements of the angular correlation function

    International Nuclear Information System (INIS)

    Sobreira, F.; Rosenfeld, R.; Simoni, F. de; Costa, L. A. N. da; Maia, M. A. G.; Makler, M.

    2011-01-01

    We study forecasts for the accuracy of the determination of cosmological parameters from future large-scale photometric surveys obtained using the full shape of the 2-point galaxy angular correlation function. The effects of linear redshift-space distortion, photometric redshift Gaussian errors, galaxy bias and nonlinearities in the power spectrum are included on our analysis. The Fisher information matrix is constructed with the full covariance matrix, including the correlation between nearby redshift shells arising from the photometric redshift error. We show that under some reasonable assumptions, a survey such as the imminent Dark Energy Survey should be able to constrain the dark energy equation of state parameter w and the cold dark matter density Ω cdm with a precision of the order of 20% and 13%, respectively, from the full shape of the angular correlation function alone. When combined with priors from other observations the precision in the determination of these parameters improve to 8% and 4%, respectively.

  14. Resolution of potential ambiguities through farside angular structure: Semiclassical analysis

    International Nuclear Information System (INIS)

    Fricke, S.H.; Brandan, M.E.; McVoy, K.W.

    1988-01-01

    The optical potential fits summarized in the preceding paper are subjected to a semiclassical analysis of the Ford-Wheeler--Knoll-Schaeffer type. The important broad dips in their farside cross sections, which are essential in greatly reducing potential ambiguities, are found (in partial agreement with a suggestion of Goldberg's) to be mainly weak ''Airy'' or rainbow minima, that serve to identify deeply penetrating trajectories. The semiclassical analysis also permits the identification and understanding of a new category of discrete and continuous potential ambiguities, and suggests the manner in which specific features of the angular distributions (such as spacings and depths of various angular minima) determine the Woods-Saxon parameters found by a chi-squared search

  15. Relativistic correction to the deuteron magnetic moment and angular condition

    International Nuclear Information System (INIS)

    Kondratyuk, L.A.; Strikman, M.I.

    1983-01-01

    The relativistic correction (RC) to the deuteron magnetic moment μsub(d) is investigated using the light-cone dynamics. The restrictions imposed by the angular condition on the electromagnetic current operator of deuteron are discussed in detail. It is shown that the additive model for the current operator of interacting consistuencies is consistent with the angular condition only for the two first terms of expansion of the ''good'' electromagnetic current component jsub(+) in powers of the momentum transfer q. The RC into μsub(d) is calculated using the mattix element of the ''good'' component. The account of RC decreases essentially the discrepancy between the theoretical and experimental values. The value of Δsub(μ) is determined for the Hamada-Johnston potential hard core potential (0.93x10 -2 ) for the Reid soft core potential (0.71x10 -2 ) and for the Paris potential (0.63x10 -2 )

  16. Analogies between optical and quantum mechanical angular momentum.

    Science.gov (United States)

    Nienhuis, Gerard

    2017-02-28

    The insight that a beam of light can carry orbital angular momentum (AM) in its propagation direction came up in 1992 as a surprise. Nevertheless, the existence of momentum and AM of an electromagnetic field has been well known since the days of Maxwell. We compare the expressions for densities of AM in general three-dimensional modes and in paraxial modes. Despite their classical nature, these expressions have a suggestive quantum mechanical appearance, in terms of linear operators acting on mode functions. In addition, paraxial wave optics has several analogies with real quantum mechanics, both with the wave function of a free quantum particle and with a quantum harmonic oscillator. We discuss how these analogies can be applied.This article is part of the themed issue 'Optical orbital angular momentum'. © 2017 The Author(s).

  17. Angular correlations in top quark decays in standard model extensions

    International Nuclear Information System (INIS)

    Batebi, S.; Etesami, S. M.; Mohammadi-Najafabadi, M.

    2011-01-01

    The CMS Collaboration at the CERN LHC has searched for the t-channel single top quark production using the spin correlation of the t-channel. The signal extraction and cross section measurement rely on the angular distribution of the charged lepton in the top quark decays, the angle between the charged lepton momentum and top spin in the top rest frame. The behavior of the angular distribution is a distinct slope for the t-channel single top (signal) while it is flat for the backgrounds. In this Brief Report, we investigate the contributions which this spin correlation may receive from a two-Higgs doublet model, a top-color assisted technicolor (TC2) and the noncommutative extension of the standard model.

  18. Angular distribution and atomic effects in condensed phase photoelectron spectroscopy

    International Nuclear Information System (INIS)

    Davis, R.F.

    1981-11-01

    A general concept of condensed phase photoelectron spectroscopy is that angular distribution and atomic effects in the photoemission intensity are determined by different mechanisms, the former being determined largely by ordering phenomena such as crystal momentum conservation and photoelectron diffraction while the latter are manifested in the total (angle-integrated) cross section. In this work, the physics of the photoemission process is investigated in several very different experiments to elucidate the mechanisms of, and correlation between, atomic and angular distribution effects. Theoretical models are discussed and the connection betweeen the two effects is clearly established. The remainder of this thesis, which describes experiments utilizing both angle-resolved and angle-integrated photoemission in conjunction with synchrotron radiation in the energy range 6 eV less than or equal to h ν less than or equal to 360 eV and laboratory sources, is divided into three parts

  19. Angular momentum projection of cranked PNC wave function

    International Nuclear Information System (INIS)

    Han Yong

    2000-01-01

    In studying the properties of nuclear higher-spin states, not only the K-mixture needed to be taken into account, but also the Coriolis interaction (the cranking term) should be introduced. The cranking term breaks the time reversal symmetry, and the projection of the single-particle angular momentum on the intrinsic symmetric axis is no longer a good quantum number. This makes the theoretical calculation somewhat complicated. However, considering some intrinsic symmetry in a nucleus, it is not very difficult to apply the angular momentum projection technique to the PNC wave functions including the cranking components (the cranked PNC wave functions). The fundamental expressions for calculating the nuclear energy spectra and the electromagnetic properties are deduced and evaluated in theory, consequently the feasibility of actualizing the present scheme is made clear

  20. Report on the ESO Workshop ''Astronomy at High Angular Resolution''

    Science.gov (United States)

    Boffin, H.; Schmidtobreick, L.; Hussain, G.; Berger, J.-Ph.

    2015-03-01

    A workshop took place in Brussels in 2000 on astrotomography, a generic term for indirect mapping techniques that can be applied to a huge variety of astrophysical systems, ranging from planets, single stars and binaries to active galactic nuclei. It appeared to be timely to revisit the topic given the many past, recent and forthcoming improvements in telescopes and instrumentation. We therefore decided to repeat the astrotomography workshop, but to put it into the much broader context of high angular resolution astronomy. Many techniques, from lucky and speckle imaging, adaptive optics to interferometry, are now widely employed to achieve high angular resolution and they have led to an amazing number of new discoveries. A summary of the workshop themes is presented.