Sample records for madsa matriz para

  1. Matriz de contabilidad social extendida ambientalmente para análisis económico de la región del Bio Bio

    Microsoft Academic Search

    Cristian Mardones P; Jorge Saavedra E

    2011-01-01

    Se construye una Matriz de Contabilidad Social Extendida Ambientalmente para la Región del Bío Bío. Para ello aplicamos el método indirecto conocido como Cross Entropy para actualizar una Matriz de Contabilidad Social de esta región desde el año 1996 al 2006. Esta matriz sirve de base para un análisis de multiplicadores, cuyo fin es identificar los sectores productivos de la

  2. Cartilha para Legalizao de Casas Religiosas

    E-print Network

    Cartilha para Legalização de Casas Religiosas de Matriz Africana #12;2 Rio de Janeiro, 30 de maio Secretaria Estadual de Assistência Social e Direitos Humanos do Rio de Janeiro. NIREMA: Núcleo Social e Direitos Humanos do Rio de Janeiro Coordenador Geral Prof. Adriano Pilatti Centro de Ciências

  3. Variabilidade genética e estimativas de herdabilidade para o caráter germinação em matrizes de Hevea brasiliensis

    Microsoft Academic Search

    Reginaldo Brito da Costa; Paulo de Souza Gonçalves; Lincoln Carlos; Silva de Oliveira; Eduardo José de Arruda; Wagner José Martins

    2005-01-01

    The present study was carried out to evaluate the genetic variability and genetic parameters of Hevea brasiliensis parent trees for the germination trait. Seeds from thirty parent trees were collected at the Experimental Station, in Votuporanga, SP. The germination tests were carried out at the COMFLORA nursery in Ponta Porã city, following the randomized block design, four replications and ten

  4. Aplicación del Teorema de Nekhorochev para tiempos de estabilidad en Mecánica Celeste

    Microsoft Academic Search

    O. Miloni; J. Núñez; A. Brunini

    1999-01-01

    En Mecánica Celeste, uno de los problemas centrales consiste en la determinación de los tiempos de estabilidad. El teorema de Nekhorochev proporciona un método para dicho estudio, para un sistema determinado por un hamiltoniano descripto en las variables acción-ángulo. El trabajo consiste en la acotación tanto del potencial perturbador y de la matriz hessiana del hamiltoniano integrable para determinar luego

  5. MATRIZANT APPROACH TO ACOUSTIC ANALYSIS OF PERFORATED MULTIPLE PIPE MUFFLERS CARRYING MEAN FLOW

    Microsoft Academic Search

    E. Dokumaci

    1996-01-01

    A new method based on the matrizant theory is developed for acoustic analysis of perforated pipe muffler components. The analysis is presented in a generality encompassing any number of parallel pipes that communicate along a common length. The utility and potential of the method is demonstrated on a plug muffler and a reverse flow muffler. The analysis shows, for the

  6. Compósitos Bioativos Obtidos a Partir da Inserção de Vidro Bioativo em Matriz de Poli(Metacrilato de Metila)

    Microsoft Academic Search

    Paulo E. Silva Junior; Rodrigo L. Oréfice

    2001-01-01

    Resumo: Várias biocerâmicas são capazes de se ligarem a tecidos vivos (bioatividade), no entanto apresen- tam propriedades mecânicas muito diferentes daquelas exibidas por tecidos naturais. Tal fato acaba por restringir o uso desses materiais em um mais extenso número de aplicações biomédicas. Compósitos de matriz polimérica reforçada com uma fase bioativa podem combinar o comportamento bioativo caracterís- tico de algumas

  7. BIOCOMBUSTÍVEIS E COMÉRCIO INTERNACIONAL: OPORTUNIDADES E DESAFIOS PARA AMÉRICA LATINA E CARIBE

    Microsoft Academic Search

    André Luiz Marques Kós; Mario Miguel Amin Garcia Herreros; Heriberto Wagner Amanajás Pena

    2011-01-01

    O grande desafio do mundo nos próximos anos será convergir desenvolvimento econômico com sustentabilidade. Nesse sentido a busca para ampliar a participação de energias sustentáveis nas matrizes energéticas tanto países de desenvolvidos como de países em desenvolvimento deverá cada vez sofrer mais pressão da comunidade internacional. Nesse ambiente alguns países da America Latina e Caribe podem beneficiar-se, já que possuem

  8. Application of the matrizant method to calculate the third-order aberration coefficients for a sector magnetic field including fringing-field effects

    Microsoft Academic Search

    S. N. Mordik; A. G. Ponomarev

    2001-01-01

    The matrizant method is used to study the nonlinear dynamics of charged particles in magnetic sector analyzers. The calculations\\u000a of matrizants (transfer matrices) allow for both fringing-field effects due to the stray field and higher harmonics of the\\u000a sector magnetic field (up to the third order). For the rectangular distribution of the field components along the optical\\u000a axis, analytical expressions

  9. Aplicación del Teorema de Nekhorochev para tiempos de estabilidad en Mecánica Celeste

    NASA Astrophysics Data System (ADS)

    Miloni, O.; Núñez, J.; Brunini, A.

    En Mecánica Celeste, uno de los problemas centrales consiste en la determinación de los tiempos de estabilidad. El teorema de Nekhorochev proporciona un método para dicho estudio, para un sistema determinado por un hamiltoniano descripto en las variables acción-ángulo. El trabajo consiste en la acotación tanto del potencial perturbador y de la matriz hessiana del hamiltoniano integrable para determinar luego el tiempo de estabilidad de dicho sistema, donde por estabilidad se entiende la separación en norma infinito en el espacio de las acciones.

  10. Características físicas e nutricionais da matriz de encapsulamento na produção de sementes sintéticas de pimenta-longa (Piper hispidinervum C. DC.)

    Microsoft Academic Search

    Rodrigo da Silva Guedes; Frederico Henrique da Silva Costa; Jonny Everson Scherwinski Pereira

    2007-01-01

    RESUMO - A pimenta-longa (Piper hispidinervum C. DC.) é um arbusto da família Piperaceae, nativa da região amazônica, que vem despertando o interesse das indústrias de cosméticos e bioinseticidas pelo alto teor de safrol, óleo essencial extraído das folhas e talos. O objetivo do trabalho foi avaliar a influência de características físicas e nutricionais da matriz de encapsulamento durante a

  11. VARIA?'ES GEN…TICAS PARA CARACTER?STICAS DO SISTEMA RADICULAR DE MUDAS DE BARU (Dipteryx alata Vog.)1

    Microsoft Academic Search

    Adelson Nascimento Oliveira; Ana Carolina da Silva; Carlos da Silva Rosado; Crespo Rodrigues

    2006-01-01

    RESUMO ñ Este estudo objetivou estimar os par‚metros genØticos relativos ‡ qualidade do sistema radicular de mudas de baru. Para isso, foram utilizadas mudas provenientes de sementes colhidas em 21 Ærvores-matriz de polinizaÁªo livre no MunicÌpio de CapinÛpolis, Minas Gerais. Quarenta e cinco dias apÛs a germinaÁªo, as imagens das raÌzes de 20 mudas de cada progŒnie foram obtidas por

  12. Métodos de selección para la extracción de señales débiles

    Microsoft Academic Search

    Cristèle Roux

    2009-01-01

    Presentaremos un método de extracción de las señales débiles basado en el análisis evolutivo y estructural de los campos semánticos. Este método hace intervenir las siguientes herramientas:\\u000a\\u000a•\\u0009Matriz de cruces de los términos semánticos con el tiempo,\\u000a•\\u0009Extracción de los términos emergentes (por normalización posterior, son elecciones de la última columna),\\u000a•\\u0009Matriz de concurrencia cruzando los términos

  13. ParaSITE

    E-print Network

    Rakowitz, Michael

    1998-01-01

    paraSITE proposes the appropriation of exterior ventilation systems on existing architecture to inflate pneumatic shelters that are designed for homeless people. This project involves the production of a series of inflatable ...

  14. TESIS DOCTORAL NEGACION CONSTRUCTIVA PARA

    E-print Network

    Alpuente, María

    TESIS DOCTORAL NEGACION CONSTRUCTIVA PARA PROGRAMACION LOGICA-ECUACIONAL Memoria presentada por Mar CONSTRUCTIVA PARA PROGRAMACION LOGICA-ECUACIONAL Tesis Doctoral en Inform#19;atica presentada por Mar#19;#16;a

  15. AYUDA PARA INVIDENTES UTILIZANDO TELEFONOS

    E-print Network

    Autonoma de Madrid, Universidad

    ´on, aplicaci´on para m´oviles, c´odigo, base de da- tos,dpi (puntos por pulgada, dots per inch),layout,GPS. III la UAM. #12;Resumen Resumen El proyecto desarrolla aplicaciones para ayuda a invidentes utlizando tel´efonos inteligentes. La aplicaci´on principal est´a desarrollada para aparatos Android. Tiene como objetivo ayudar

  16. Tomografía computarizada (TC) y exploraciones para cáncer

    Cancer.gov

    Hoja informativa que describe el procedimiento y la tecnología de exploraciones con tomografía computarizada así como sus usos para el diagnóstico, para exámenes de detección y para tratamiento del cáncer.

  17. Pruebas genéticas para síndromes hereditarios de cáncer

    Cancer.gov

    Hoja informativa sobre pruebas genéticas para riesgos heredados de cáncer; incluye tipos de pruebas, para quién están indicadas y explicación y confidencialidad de los resultados. Ofrece información de pruebas genéticas a domicilio o pruebas para el consumidor.

  18. Separating para and ortho water.

    PubMed

    Horke, Daniel A; Chang, Yuan-Pin; D?ugo??cki, Karol; Küpper, Jochen

    2014-10-27

    Water exists as two nuclear-spin isomers, para and ortho, determined by the overall spin of its two hydrogen nuclei. For isolated water molecules, the conversion between these isomers is forbidden and they act as different molecular species. Yet, these species are not readily separated, and no pure para sample has been produced. Accordingly, little is known about their specific physical and chemical properties, conversion mechanisms, or interactions. The production of isolated samples of both spin isomers is demonstrated in pure beams of para and ortho water in their respective absolute ground state. These single-quantum-state samples are ideal targets for unraveling spin-conversion mechanisms, for precision spectroscopy and fundamental symmetry-breaking studies, and for spin-enhanced applications, for example laboratory astrophysics and astrochemistry or hypersensitized NMR experiments. PMID:25196938

  19. SEGURIDAD ENERGETICASEGURIDAD ENERGETICA UN DESAFIO PARA CHILEUN DESAFIO PARA CHILE

    E-print Network

    Catholic University of Chile (Universidad Católica de Chile)

    Universidad Católica de Chile Departamento de Ingeniería Eléctrica Hugh Rudnick 24 Noviembre 2006 #12;2 Tabla Producto Geográfico Bruto versus Consumo Energético (Fuente: CNE y Banco Central) Desarrollo económico y con petróleo a EEUU en relación a Israel el año 1970 ·Venezuela utilizando energía para influir en

  20. Compatibilidad con audfonos para sordos

    E-print Network

    Greenberg, Albert

    Compatibilidad con audífonos para sordos Hearing Aid Compatibility Q&A Q. What does hearing aid the different features of the phone thoroughly and in different locations, using your hearing aid or cochlear implant, to determine if you hear any interfering noise. Consult a sales representative about phone return

  1. Prmio para trs novas aplicaes

    E-print Network

    Instituto de Sistemas e Robotica

    Prémio para três novas aplicações Tecnologia. A "wiride" venceu o "Lisbon Big Apps", concurso de Instituto Superior Técnico que desenvolveu o projeto, citada pelo/dAT, a "wiride" é uma nova forma de andar

  2. Estudios ALCHEMIST para el cáncer de pulmón

    Cancer.gov

    Conjunto de información sobre los estudios ALCHEMIST para el cáncer de pulmón, los cuales examinarán los tejidos de tumores de pacientes con cáncer de pulmón en estadio inicial para detectar mutaciones genéticas en genes EGFR y ALK.

  3. Presidncia da Repblica Subchefia para Assuntos Jurdicos

    E-print Network

    Paraná, Universidade Federal do

    credenciamento e recredenciamento de instituições de educação superior; II - homologar os instrumentos de necessárias; III - propor ao CNE diretrizes para a elaboração, pelo INEP, dos instrumentos de avaliação para credenciamento de instituições; IV - estabelecer diretrizes para a elaboração, pelo INEP, dos instrumentos de

  4. Tutorial para rellenar el formulario de expediente de personal y cargos TUTORIAL PARA RELLENAR EL

    E-print Network

    Escolano, Francisco

    Tutorial para rellenar el formulario de expediente de personal y cargos TUTORIAL PARA RELLENAR EL EXPEDIENTE ESPACIAL DE PERSONAS Y CARGOS Objetivo del tutorial: Explicar paso a paso el procedimiento para ubicadas. En este tutorial aprenderá a: ­ Seleccionar mapas de los edificios para imprimir ­ Comprobar los

  5. Fundo Global para o Meio Ambiente

    E-print Network

    #12;#12;Fundo Global para o Meio Ambiente Global Environment Facility Avaliação dos Recursos de Climáticos Center for Weather Forecasts and Climate Studies Programa das Nações Unidas para o Meio Ambiente Fernando Ramos Martins Samuel Luna de Abreu Ricardo Rüther Realização Divisão de Clima e Meio Ambiente

  6. Ciudades inteligentes: beneficios para la inclusin social

    E-print Network

    Escolano, Francisco

    Ciudades inteligentes: beneficios para la inclusión social http://www.iuii.ua.es/CatedraTelefonicaUA/smart-cities Universidad de Alicante Inscripción gratuita a través del formulario http://www.iuii.ua.es/smart-cities trasladar los conceptos de Smart City al ámbito de la Universidad para lograr el objetivo de mejora de la

  7. PROGRAMA JOVENS TALENTOS PARA A CINCIA

    E-print Network

    Lucero, Jorge Carlos

    Relações Exteriores para estrangeiros; a Carteira de Trabalho e Previdência Social; o Certificado de: máquinas calculadoras, agendas eletrônicas ou similares, telefones celulares, smartphones, tablets, ipod

  8. Consejos para pacientes que reciben quimioterapia

    Cancer.gov

    Serie de dieciocho (18) hojas sobre los efectos secundarios de la quimioterapia. Cada hoja contiene recomendaciones y sugerencias prácticas para ayudarle a controlar los efectos secundarios durante la quimioterapia, y a que se sienta mejor durante el tratamiento.

  9. Consejos para pacientes que reciben radioterapia

    Cancer.gov

    Serie de nueve (9) hojas sobre los efectos secundarios de la radioterapia. Cada hoja contiene recomendaciones y sugerencias prácticas para ayudarle a controlar los efectos secundarios durante la radioterapia, y a que se sienta mejor durante el tratamiento.

  10. Software Libre para ensear o aprender Matemtica

    E-print Network

    De Nápoli, Pablo Luis

    Software Libre para enseñar o aprender Matemática Porqué y Cómo Pablo De Nápoli pdenapo@dm.uba.ar #12;Introducción · En esta charla, presentaremos algunos de los pogramas que son software libre, que ventajas de utilizar software libre para la docencia y la investigación en matemática. #12;¿Por qué

  11. Tecnologa para todos Sistema Inalmbrico de Rice

    E-print Network

    Tecnología para todos Sistema Inalámbrico de Rice Andrea Trevino Rice University http://www.techforall.org/tfa_wireless.html http://tfa.rice.edu #12;Por qué en Pecan Park? La Misión de TFA: Proporcionar conocimientos a la comunidad. El propósito de Rice: Usar este programa para explorar la siguiente generación del sistema

  12. The ParaScope parallel programming environment

    NASA Technical Reports Server (NTRS)

    Cooper, Keith D.; Hall, Mary W.; Hood, Robert T.; Kennedy, Ken; Mckinley, Kathryn S.; Mellor-Crummey, John M.; Torczon, Linda; Warren, Scott K.

    1993-01-01

    The ParaScope parallel programming environment, developed to support scientific programming of shared-memory multiprocessors, includes a collection of tools that use global program analysis to help users develop and debug parallel programs. This paper focuses on ParaScope's compilation system, its parallel program editor, and its parallel debugging system. The compilation system extends the traditional single-procedure compiler by providing a mechanism for managing the compilation of complete programs. Thus, ParaScope can support both traditional single-procedure optimization and optimization across procedure boundaries. The ParaScope editor brings both compiler analysis and user expertise to bear on program parallelization. It assists the knowledgeable user by displaying and managing analysis and by providing a variety of interactive program transformations that are effective in exposing parallelism. The debugging system detects and reports timing-dependent errors, called data races, in execution of parallel programs. The system combines static analysis, program instrumentation, and run-time reporting to provide a mechanical system for isolating errors in parallel program executions. Finally, we describe a new project to extend ParaScope to support programming in FORTRAN D, a machine-independent parallel programming language intended for use with both distributed-memory and shared-memory parallel computers.

  13. PREPARE UN EQUIPO PORTTIL PARA EMERGENCIAS Prepare un equipo portatil para emergencias de modo que pueda

    E-print Network

    libre) 2. Equipos medicos caseros (ejemplos: medidor de glucosa, monitor de presion arterial, bastonPREPARE UN EQUIPO PORTÁTIL PARA EMERGENCIAS Prepare un equipo portatil para emergencias de modo que llevar el equipo. Incluya los siguientes artículos en el equipo: 1. Medicamentos (recetados y de venta

  14. MÉTODOS PARA DETERMINAÇÃO DA DENSIDADE BÁSICA DE CAVACOS PARA CONÍFERAS E FOLHOSAS

    Microsoft Academic Search

    Celso Edmundo; Bochetti Foelkel; Maria Aparecida Mourão Brasil; Luiz Ernesto; George Barrichelo

    1 - INTRODUÇÃO A densidade da madeira é uma característica complexa resultante da combinação de diversos fatôres. Existem inúmeros trabalhos mostrando sua relação com as dimensões das fibras, particularmente espessura da parede, volume dos vasos e parênquimas, proporção entre madeira primaveril e outonal, e arranjo dos elementos anatômicos. Êste assunto tem sido intensivamente estudado para as coníferas, porém para as

  15. DMA IMECC UNICAMP MT402: Matrizes 1o Sem 2009

    E-print Network

    Andreani, Roberto

    . xk+1 = xk + kdk com k = rT k rk dT k Adk . k - k + 1 ir ao passo 2. M´etodo dos Gradientes conjugados k = rT k rk dT k Adk . dk+1 = rk+1 + kdk com k = rT k+1rk+1 rT k rk . k - k + 1 ir ao passo 2. 12

  16. PROJECTO LEXNET OLHA PARA AS REDES WIRELESS

    E-print Network

    Instituto de Sistemas e Robotica

    PROJECTO LEXNET OLHA PARA AS REDES WIRELESS As radiações provocadas pelas redes sem fios estão. PAG. 6 #12;Radiações das redes wireless debaixo de olho O projecto europeu Lexnet tem como objectivo redes de comunicações móveis, GSM, Wi-Fi, rá- dio, sem comprometer a qualidade dos ser- viços. Tendo

  17. Smartphones para cegos Uma inveno portuguesa

    E-print Network

    Instituto de Sistemas e Robotica

    Smartphones para cegos Uma invenção portuguesa Usar um ecrã tátil de forma discreta, sem recurso ao mentores do projeto. O Holi�raille é uma espécie de capa, acoplável à parte de trás de um smartphone e que

  18. Semntica Operacional para la Programacin en Lgica

    E-print Network

    Simari, Guillermo R.

    sustitución tal que (A) = A Def: Sean ={ [U1, s1], ..., [Um, sm] } y = { [V1, t1], ..., [Vn, tn] } sendas sustituciones, tales que Ui Vj y Ui no aparece en tj, para todo par i, j tal que 1 i m y 1 j n. Entonces(S) ], [Y, a], [Z, T] }{ [S,W], [T, b]}= {[X, f(W)], [Y, a], [Z, b], [S,W], [T, b]} Def: Sean ={ [U1, s1

  19. Semntica Operacional para la Programacin en Lgica

    E-print Network

    Simari, Guillermo R.

    (A) = A Def: Sean ={ [U1, s1], ..., [Um, sm] } y = { [V1, t1], ..., [Vn, tn] } sendas sustituciones, tales que Ui Vj y Ui no aparece en tj, para todo par i, j tal que 1 i m y 1 j n. Entonces, definimos la, T] }{ [S,W], [T, b]}= {[X, f(W)], [Y, a], [Z, b], [S,W], [T, b]} Def: Sean ={ [U1, s1], ..., [Um

  20. Ortho-Para Hydrogen Ratiometer Design

    Microsoft Academic Search

    D. Zhou; N. S. Sullivan

    2006-01-01

    The design and performance of a thermal conductivity gauge to measure the ratio of ortho- to para-hydrogen content is reported. The gauge employs an ultra-thin film as heater and sensor. This ratiometer has a nearly pressure-independent thermal conductivity response over a broad pressure range. The thermal conductivity of hydrogen gas and nitrogen gas have been measured and found qualitatively correct.

  1. Para-hydrogen perspectives in hyperpolarized NMR.

    PubMed

    Glöggler, Stefan; Colell, Johannes; Appelt, Stephan

    2013-10-01

    The first instance of para-hydrogen induced polarization (PHIP) in an NMR experiment was serendipitously observed in the 1980s while investigating a hydrogenation reaction (Seldler et al., 1983; Bowers and Weitekamp, 1986, 1987; Eisenschmid et al., 1987) [1-4]. Remarkably a theoretical investigation of the applicability of para-hydrogen as a hyperpolarization agent was being performed in the 1980's thereby quickly providing a theoretical basis for the PHIP-effect (Bowers and Weitekamp, 1986) [2]. The discovery of signal amplification by a non-hydrogenating interaction with para-hydrogen has recently extended the interest to exploit the PHIP effect, as it enables investigation of compounds without structural alteration while retaining the advantages of spectroscopy with hyperpolarized compounds [5]. In this article we will place more emphasis of the future applications of the method while only briefly discussing the efforts that have been made in the understanding of the phenomenon and the development of the method so far. PMID:23932399

  2. TELEMEDICINA: UN DESAFÍO PARA AMÉRICA LATINA

    PubMed Central

    Litewka, Sergio

    2011-01-01

    La telemedicina es una tendencia creciente en la prestación de los servicios médicos. Aunque la eficacia de esta práctica no ha estado bien establecida, es probable que los países en desarrollo compartirán este nuevo paradigma con los desarrollados. Los defensores de la telemedicina en América Latina sostienen que será una herramienta útil para reducir las disparidades y mejorar la accesibilidad de atención de salud. Aunque América Latina quizá se convierta en un lugar para la investigación e investigación de estos procedimientos, no está claro cómo la telemedicina podría contribuir a mejorar la accesibilidad para las poblaciones desfavorecidas, o coexistir con sistemas de atención de salud públicos crónicamente enfermos. Telemedicine is a growing trend in the provision of medical services. Although the effectiveness of this practice has not been well established, it is likely that developing countries will share this new paradigm with developed ones. Supporters of telemedicine in Latin America maintain that it will be a useful tool for reducing disparities and improving health care accessibility. Although Latin America might become a place for research and investigation of these procedures, it is not clear how telemedicine could contribute to improving accessibility for disadvantaged populations, or coexist with chronically ill-funded public healthcare systems. PMID:21625326

  3. BECAS DE MASTER PARA DESARROLLAR TRABAJOS DE INVESTIGACIN EN EL

    E-print Network

    Fraguela, Basilio B.

    10 becas para realizar masters para estudiantes de cualquier nacionalidad que sean admitidos en las.alvarez@co.ieo.es Biodiversidad y Actividad Microbiana del Ecosistema Pelágico Profundo en el Atlántico Norte Marta M. Varela

  4. Centro para la Salud Mundial (CGH) del NCI

    Cancer.gov

    El Centro para la Salud Mundial (CGH) del Instituto Nacional del Cáncer coordina actividades de investigación y trabaja con socios nacionales e internacionales para comprender y enfrentar la carga que representa el cáncer a nivel mundial.

  5. Planificación para la etapa final de la vida

    Cancer.gov

    Información para pacientes, sus familiares y amigos sobre el cuidado del paciente terminal, la planificación para el final de la vida, y la aflicción, el duelo y manejo de la pérdida de un ser querido.

  6. Gua para la Evaluacin de Riesgo Ambiental de Organismos

    E-print Network

    Parrott, Wayne

    Guía para la Evaluación de Riesgo Ambiental de Organismos Genéticamente Modificados #12;#12;Guía para la Evaluación de Riesgo Ambiental de Organismos Genéticamente Modificados #12;APOYO: © 2012 ILSI) Guia para la evaluación de riesgo ambiental de organismos genéticamente midificados / [editores] Paulo

  7. Guia para a Avaliao do Risco Ambiental de Organismos

    E-print Network

    Parrott, Wayne

    Guia para a Avaliação do Risco Ambiental de Organismos Geneticamente Modificados 1ª Edição, São Paulo - ILSI Brasil 2012 #12;#12;Guia para a Avaliação do Risco Ambiental de Organismos Geneticamente para a Avaliação do Risco Ambiental de Organismos Geneticamente Modificados / [editores] Paulo Paes de

  8. Protocolo de Espacios. Tutorial de estancias TUTORIAL PARA RELLENAR EL

    E-print Network

    Escolano, Francisco

    Protocolo de Espacios. Tutorial de estancias TUTORIAL PARA RELLENAR EL EXPEDIENTE ESPACIAL DE ESTANCIAS Objetivo del tutorial: Explicar paso a paso el procedimiento para realizar el expediente de estancias En este tutorial aprenderá a: ­ Seleccionar mapas de los edificios para imprimir ­ Comprobar los

  9. Technological Foresight - Um instrumento para política científica e tecnológica1

    Microsoft Academic Search

    MAURO ZACKIEWICZ; SÉRGIO SALLES-FILHO

    Este texto tem por objetivo apresentar a abordagem de technological foresight2, crescentemente utilizada em vários países como instrumento para a alocação de fundos públicos de C&T, para definição de priorida- des de pesquisa e para melhorar a articulação das organizações de pes- quisa com as redes de inovação e o setor produtivo. São discutidas suas bases teóricas, suas principais características

  10. Control del dolor: Apoyo para las personas con cáncer

    Cancer.gov

    Contiene información sobre las medicinas contra el dolor para pacientes con cáncer, los planes para controlarlo, cómo hablar con su equipo de atención médica sobre el dolor que usted siente y qué hacer para controlar los efectos físicos y emocionales del mismo.

  11. A perspective on applications of ligand-field analysis: inspiration from electron paramagnetic resonance spectroscopy of coordination complexes of transition metal ions

    Microsoft Academic Search

    Joshua Telser

    2006-01-01

    Este artigo descreve de maneira um tanto pessoal, o uso da espectroscopia de ressonância paramagnética eletrônica (EPR), incluindo EPR de alta freqüência e alto campo (HFEPR) para investigar a estrutura eletrônica de complexos de íons de metal de transição. Os parâmetros Hamiltonianos de spin, obtidos a partir de experimentos EPR, matriz g para sistemas com S =1\\/2 e matrizes g

  12. Publicaciones IFMBE - Instrucciones para los Autores en la Preparación de Artículos para el IV Congreso Latinoamericano de Ingeniería Biomédica

    Microsoft Academic Search

    A. B. Firstauthor; C. Coauthor

    Este modelo presenta las instrucciones para la preparación de artículos para el CLAIB2007, basado en la serie de publicaciones del IFMBE. El mismo pretende guiar a los autores en la preparación de la versión electrónica de sus artículos. Solamente los artículos que respeten este modelo serán considerados para aceptación y publicación en los Ana- les del evento. El Abstract debe

  13. Semana nacional de preparacin para clima severo 2 al 8 de marzo de Manual para las redes sociales

    E-print Network

    clima severo en las redes sociales. Prepararse para clima severo va más allá de proteger a su familiaSemana nacional de preparación para clima severo ­ 2 al 8 de marzo de 2014 Manual para las redes sociales Usted, también, puede ser como una fuerza de la naturaleza en su comunidad ayudando a la Agencia

  14. Producing and quantifying enriched para-H2

    NASA Astrophysics Data System (ADS)

    Tom, Brian A.; Bhasker, Siddhartha; Miyamoto, Yuki; Momose, Takamasa; McCall, Benjamin J.

    2009-01-01

    The production of enriched para-H2 is useful for many scientific applications, but the technology for producing and measuring para-H2 is not yet widespread. In this note and in the accompanying auxiliary material, we describe the design, construction, and use of a versatile standalone converter that is capable of producing para-H2 enrichments of up to ?99.99% at continuous flow rates of up to 0.4 SLM. We also discuss para-H2 storage and back conversion rates, and improvements to three techniques (thermal conductance, NMR, and solid hydrogen impurity spectroscopy) used to quantify the para-H2 enrichment.

  15. Allergic contact dermatitis to para-phenylenediamine.

    PubMed

    Jenkins, David; Chow, Elizabeth T

    2015-02-01

    Exposure to hair dye is the most frequent route of sensitisation to para-phenylenediamine (PPD), a common contact allergen. International studies have examined the profile of PPD, but Australian-sourced information is lacking. Patients are often dissatisfied with advice to stop dyeing their hair. This study examines patients' characteristics, patch test results and outcomes of PPD allergy from a single Australian centre, through a retrospective analysis of patch test data from 2006 to 2013 at the Liverpool Hospital Dermatology Department. It reviews the science of hair dye allergy, examines alternative hair dyes and investigates strategies for hair dyeing. Of 584 patients, 11 were allergic to PPD. Our PPD allergy prevalence rate of 2% is at the lower end of international reported rates. About half these patients also react to para-toluenediamine (PTD). Affected patients experience a significant lifestyle disturbance. In all, 78% tried alternative hair dyes after the patch test diagnosis and more than half continued to dye their hair. Alternative non-PPD hair dyes are available but the marketplace can be confusing. Although some patients are able to tolerate alternative hair dyes, caution is needed as the risk of developing an allergy to other hair dye ingredients, especially PTD, is high. PMID:25302475

  16. Programas del NCI: Análisis molecular para la elección de tratamientos (MATCH) y MATCH para pacientes infantiles

    Cancer.gov

    Información sobre el Programa de análisis molecular para la elección de tratamientos (MATCH) del NCI, el cual asignará pacientes con tumores sólidos y linfomas avanzados que hayan dejado de responder al tratamiento convencional a estudios clínicos de acuerdo con las anomalías genéticas de sus tumores.

  17. Semana Nacional de Preparacin para Clima Severo 2014 Pgina 1 Plantilla para artculos de blog

    E-print Network

    amenaza de clima severo. El tornado categoría EF-5 que azotó a Moore, Oklahoma el 20 de mayo fue el supervivencia. Esto es especialmente importante ante la amenaza de clima severo. Se estima que el tornado. Visite weather.gov para obtener la información más actualizada sobre las amenazas meteorológicas. Tome

  18. Chapter 4: PARAS Microkernel at a Glance 1 PARAS Microkernel at a Glance

    E-print Network

    Melbourne, University of

    current ones) to manage its resources. To meet this requirement, we have developed an OS kernel called-of-the-art microkernel technology. It supports most essential services such as process, memory, and interprocess communication management. In the design of the PARAS microkernel, we have adopted the philosophy of migrating

  19. Controlling External Parasites CeCarter\\FactSheets\\ExParas.indd ExParas.pdf

    E-print Network

    New Hampshire, University of

    , or manure ­ or in wet areas such as a muddy area around a water tub. Good stable management practices canParas.pdf Revised 2009-11 by removing places where larva can grow. Drain any muddy areas; clean up any spilled feed is important. Make sure the shelter is kept clean, and consider adding a walk through barrier such as hanging

  20. Más para ellas - Sugerencias para cerrar la brecha entre géneros en las regiones en desarrollo

    Microsoft Academic Search

    Alessandro Magnoli

    2005-01-01

    Según el pensamiento convencional, la salud y la educación son factores esenciales para el desarrollo económico y social: permiten mejorar la distribución del ingreso y la productividad, y además, los más beneficiados son los pobres. Sin embargo, en muchas regiones del mundo no todos los miembros de la sociedad reciben estos servicios equitativamente. En muchos casos las mujeres están excluidas

  1. Potencial de las comarcas aragonesas para la localización industrial. Implicaciones para las autoridades públicas

    Microsoft Academic Search

    Lucía Isabel García Cebrián; Antonio Muñoz Porcar

    2010-01-01

    RESUMEN Para que las empresas puedan desarrollar favorablemente sus actividades manufactureras, logísticas o de cualquier otra índole, es necesario que el espacio físico en el que se van a desarrollar disponga, de la infraestructura básica que las organizaciones demandan y que afectan no sólo al suelo industrial sino a las instalaciones que los propios polígonos les facilitan. El objetivo de

  2. PLAN ARGENTINA INNOVADORA 2020 Temas estratgicos para convocatorias 2014

    E-print Network

    Santos, Juan

    abiótico. Producción de germoplasma de calidad para diferentes usos/servicios ambientales. Productos por capa. Control bacteriano en fondo de pozo para la reducción de la producción de sulfhídrico componentes electrónicos y microelectrónicos. Sistemas de automatización y control para procesos industriales

  3. Ortho and Para Molecules of Water in Electric Field

    E-print Network

    S. N. Andreev; V. P. Makarov; V. I. Tikhonov; A. A. Volkov

    2007-03-04

    Stark effect is calculated by the perturbation theory method separately for the ortho and para water molecules. At room temperature, a 30%-difference in the energy change is found for the two species put in electric field. This implies a sorting of the ortho and para water molecules in non-uniform electric fields. The ortho/para water separation is suggested to occur in the course of steam sorption on a solid surface and of large-scale atmospheric processes.

  4. On Lightlike Geometry of Para-Sasakian Manifolds

    PubMed Central

    Acet, Bilal Eftal; K?l?ç, Erol

    2014-01-01

    We study lightlike hypersurfaces of para-Sasakian manifolds tangent to the characteristic vector field. In particular, we define invariant lightlike hypersurfaces and screen semi-invariant lightlike hypersurfaces, respectively, and give examples. Integrability conditions for the distributions on a screen semi-invariant lightlike hypersurface of para-Sasakian manifolds are investigated. We obtain a para-Sasakian structure on the leaves of an integrable distribution of a screen semi-invariant lightlike hypersurface. PMID:24892072

  5. Algoritmo genetico para la Descomposicion de Minkowski de poligonos convexos

    E-print Network

    Llanos, Diego R.

    Algoritmo gen´etico para la Descomposici´on de Minkowski de pol´igonos convexos Edilma O´i presentamos un algoritmo gen´etico para el problema. 1 Introducci´on En diversas disciplinas actuales como rob´i presentamos una propuesta usando Algoritmos Gen´eticos, para resolver el problema de la de- scomposici´on de

  6. Estrategias cognitivo-conductuales para el manejo del craving

    Microsoft Academic Search

    Iván González Salazar

    2004-01-01

    En el presente trabajo se revisaron los aspectos genera- les del craving y se destacó su importancia para la adhe- rencia al tratamiento en adicciones. De igual manera se revisaron las diferentes estrategias cognitivo-conductua- les para el manejo del craving, las cuales incluían: detención del pensamiento, técnicas de distracción, con- trol y programación de actividades, entrenamiento en relajación, técnicas de

  7. Elementos para una estrategia de desarrollo industrial en el Perú

    Microsoft Academic Search

    Rodolfo Cermeño

    1989-01-01

    El objetivo de este trabajo es discutir las propuestas de desarrollo industrial existentes para el caso peruano. Esta discusión se ha1la a la luz de las experiencias de industrialización seguidas por los países en desarrollo, a fin de identificar los elementos cruciales para el diseño de una estrategia de desarrollo industrial de largo plazo.

  8. JavaLog: Un Lenguaje para la Programacion de Agentes

    Microsoft Academic Search

    Alejandro Zunino; Luis Berdún; Analía Amandi

    2001-01-01

    Resumen La programación de sistemas multi-agentes ha sido generalmente soportada por le nguajes orientados a objetos o lenguajes lógicos. Ambos paradigmas muestran poseer características para soportar parcialmente el desarrollo de agentes. Sin embargo, si ambos paradigmas son integrados, una solución a la programación de agentes aparece en forma evidente. En este artículo, un lenguaje multi-paradigma para la programación de agentes

  9. Identificador : 987811692 IMPRESO SOLICITUD PARA VERIFICACIN DE TITULOS OFICIALES

    E-print Network

    Fraguela, Basilio B.

    UNIVERSIDAD SOLICITANTE CENTRO CÓDIGO CENTRO Universidad de A Coruña Escuela Universitaria de Arquitectura A Coruña RAMA DE CONOCIMIENTO Ingeniería y Arquitectura CONJUNTO CONVENIO No HABILITA PARA EL EJERCICIO DE ISCED 2 Ingeniería y Arquitectura Construcción e ingeniería civil Arquitectura y urbanismo HABILITA PARA

  10. Sistemas de Informao para a Web: Arquitecturas Aplicacionais

    E-print Network

    da Silva, Alberto Rodrigues

    1 Sistemas de Informação para a Web: Arquitecturas Aplicacionais Alberto Silva IST/INESC Rua Alves arquitecturas de sistemas de informação para a Web, designadamente baseadas em actividades computacionais (1. 1.1 Palavras-chave Web, Arquitecturas de Sistemas de Informação, SIW, CGI, SSI, Java, ORB. 2

  11. Uma Proposta de Modelo para Objetos de Aprendizagem

    Microsoft Academic Search

    Santos Rosa; Rogério Avellar Cordeiro; Darcy Ribeiro

    Resumo. Algumas políticas públicas têm impulsionado o desenvolvimento de material digital para uso como recurso no processo de ensino e aprendizagem, incentivando o surgimento de várias equipes, cujos produtos desenvolvidos tendem a se concentrar em repositórios para que sejam acessíveis ao públicoalvo. Muitas vezes o entendim ento de quais elementos devem estar presentes num objeto varia entre as equipes, dificultando

  12. Mundos Virtuales para la Enseñanza a través de Internet

    Microsoft Academic Search

    Inmaculada Remolar; Miguel Chover; Óscar Belmonte; Cristina Rebollo; Celso Campos

    Resumen— La aplicación de los mundos virtuales para la docencia a través de Internet hacen que el alumno pueda sumergirse en ambientes amigables que hacen más ameno el aprendizaje. Este artículo presenta tres aplicaciones docentes desarrolladas en estos entornos. La primera de ellas, para la enseñanza del vocabulario, muestra un conjunto de mundos virtuales diseñados en VRML en los que

  13. Evolucin de Funciones de Densidad de Probabilidad para Optimizacin Continua

    E-print Network

    Casillas Barranquero, Jorge

    Evolución de Funciones de Densidad de Probabilidad para Optimización Continua Jorge Casillas y algoritmo está basado en la evolución de funciones de densidad de probabilidad para adaptarse a las zonas. Palabras clave -- optimización continua, funciones de densidad de probabilidad, estimación de

  14. Gua rpida para la solicitud de una accin Marie Curie

    E-print Network

    Escolano, Francisco

    Guía rápida para la solicitud de una acción Marie Curie Fellowship Subdirección General de ser considerado elegible para la solicitud de una Marie Curie Fellowship existen tres tipos de el proyecto Marie Curie a iniciar el doctorado. #12;¿Existen requisitos según mi nacionalidad? Las

  15. Reitor da Universidade de Lisboa reclama "medidas urgentes" para

    E-print Network

    Instituto de Sistemas e Robotica

    Reitor da Universidade de Lisboa reclama "medidas urgentes" para ensino superior António Cruz Serra pública, para que as universidades ganhem "mais autonomia administrativa e financeira" O novo reitor da Universidade de Lisboa (UL), resultante da fusão entre a Clássica e a Técnica, falou hoje na necessidade de

  16. Creciendo Juntos Plan de la Universidad de Columbia para

    E-print Network

    Hone, James

    reubicación y reconstrucción de utilidades para sustituir alcantarillado y tuberías de agua y otros servicios a un ya existente regulador del alcantarillado en la avenida 12th. Columbia adjudicó este contrato para

  17. Astronaut Walter Schirra during water egress para-drop training

    NASA Technical Reports Server (NTRS)

    1965-01-01

    Astronaut Walter M. Schirra Jr., the Gemini-Titan 3 backup crew command pilot, is shown during water egress para-drop training activity in nearby Galveston Bay (10171); Schirra is shown in the water with his parachute crumpling during water egress para-drop training (10172); Schirra is retrieved from Galveston Bay by divers during water egress training (10173).

  18. Cooling by Para-to-Ortho-Hydrogen Conversion

    NASA Technical Reports Server (NTRS)

    Sherman, A.; Nast, T.

    1983-01-01

    Catalyst speeds conversion, increasing capacity of solid hydrogen cooling system. In radial-flow catalytic converter, para-hydrogen is converted to equilibrium mixture of para-hydrogen and ortho-hydrogen as it passes through porous cylinder of catalyst. Addition of catalyst increases capacity of hydrogen sublimation cooling systems for radiation detectors.

  19. LA LECTURA PARA LOS PROFESIONALES UNIVERSITARIOS. REFLEXIONES METODOLÓGICAS

    Microsoft Academic Search

    Maritza Batista Batista

    2011-01-01

    La enseñanza de las matemáticas es actualmente de gran interés para los actores responsables del acto educativo, ya que los propósitos se entienden diferente para alumnos y profesores. Tal situación ha llevado a los matemáticos educativos y otros investigadores a indagar sobre las creencias y actitudes de estudiantes y docentes de matemáticas y su influencia en el logro académico. Las

  20. Towards a double field theory on para-Hermitian manifolds

    SciTech Connect

    Vaisman, Izu [Department of Mathematics, University of Haifa, Haifa (Israel)] [Department of Mathematics, University of Haifa, Haifa (Israel)

    2013-12-15

    In a previous paper, we have shown that the geometry of double field theory has a natural interpretation on flat para-Kähler manifolds. In this paper, we show that the same geometric constructions can be made on any para-Hermitian manifold. The field is interpreted as a compatible (pseudo-)Riemannian metric. The tangent bundle of the manifold has a natural, metric-compatible bracket that extends the C-bracket of double field theory. In the para-Kähler case, this bracket is equal to the sum of the Courant brackets of the two Lagrangian foliations of the manifold. Then, we define a canonical connection and an action of the field that correspond to similar objects of double field theory. Another section is devoted to the Marsden-Weinstein reduction in double field theory on para-Hermitian manifolds. Finally, we give examples of fields on some well-known para-Hermitian manifolds.

  1. Towards a double field theory on para-Hermitian manifolds

    NASA Astrophysics Data System (ADS)

    Vaisman, Izu

    2013-12-01

    In a previous paper, we have shown that the geometry of double field theory has a natural interpretation on flat para-Kähler manifolds. In this paper, we show that the same geometric constructions can be made on any para-Hermitian manifold. The field is interpreted as a compatible (pseudo-)Riemannian metric. The tangent bundle of the manifold has a natural, metric-compatible bracket that extends the C-bracket of double field theory. In the para-Kähler case, this bracket is equal to the sum of the Courant brackets of the two Lagrangian foliations of the manifold. Then, we define a canonical connection and an action of the field that correspond to similar objects of double field theory. Another section is devoted to the Marsden-Weinstein reduction in double field theory on para-Hermitian manifolds. Finally, we give examples of fields on some well-known para-Hermitian manifolds.

  2. ¿Son las políticas locales una buena estrategia para dinamizar el mercado de trabajo? Algunos elementos para el caso colombiano

    Microsoft Academic Search

    Diana Galvis G; Mauricio López Gonzalez

    2010-01-01

    Resumen: En períodos de bajo crecimiento económico, tiempos de recesión o crisis económica, implementar una política fiscal contra-cíclica puede ser una herramienta fundamental para crear empleo y dinamizar la economía. En Colombia, específicamente en las principales ciudades del país existe una posibilidad concreta para que los gobiernos locales, a través de incrementos del gasto de inversión, impacten positivamente en la

  3. Dissociative recombination of highly enriched para-H3+

    NASA Astrophysics Data System (ADS)

    Tom, Brian A.; Zhaunerchyk, Vitali; Wiczer, Michael B.; Mills, Andrew A.; Crabtree, Kyle N.; Kaminska, Magdalena; Geppert, Wolf D.; Hamberg, Mathias; af Ugglas, Magnus; Vigren, Erik; van der Zande, Wim J.; Larsson, Mats; Thomas, Richard D.; McCall, Benjamin J.

    2009-01-01

    The determination of the dissociative recombination rate coefficient of H3+ has had a turbulent history, but both experiment and theory have recently converged to a common value. Despite this convergence, it has not been clear if there should be a difference between the rate coefficients for ortho-H3+ and para-H3+. A difference has been predicted theoretically and could conceivably impact the ortho:para ratio of H3+ in the diffuse interstellar medium, where H3+ has been widely observed. We present the results of an experiment at the CRYRING ion storage ring in which we investigated the dissociative recombination of highly enriched (˜83.6%) para-H3+ using a supersonic expansion source that produced ions with Trot˜60-100 K. We observed an increase in the low energy recombination rate coefficient of the enriched para-H3+ by a factor of ˜1.25 in comparison to H3+ produced from normal H2 (ortho:para=3:1). The ratio of the rate coefficients of pure para-H3+ to that of pure ortho-H3+ is inferred to be ˜2 at low collision energies; the corresponding ratio of the thermal rate coefficients is ˜1.5 at electron temperatures from 60 to 1000 K. We conclude that this difference is unlikely to have an impact on the interstellar ortho:para ratio of H3+.

  4. Construction of a Para-Ortho Hydrogen Test Cryostat

    NASA Astrophysics Data System (ADS)

    Essler, J.; Haberstroh, Ch.

    2010-04-01

    In a prospective hydrogen economy it is necessary to verify the para concentration of the employed hydrogen. In case of a short storage time of about a few days only it has been shown that a partial conversion into para-hydrogen gives an optimized overall efficiency. Hence, an easy and reliable method of measuring the para-hydrogen concentration is needed. In this paper, the concept and construction of a small test cryostat are described and first results are presented. The measuring principle is based on a catalytic induced adiabatic ortho-para conversion of a hydrogen gas flow starting from a known temperature. The operation of the system only requires a certain amount of liquid nitrogen as coolant. To determine the concentration of para-hydrogen it is only necessary to measure the temperature of the gas before and after the adiabatic catalyst cell. The measuring cryostat is used for further investigation of the spontaneous para-ortho conversion in the supercritical state. In addition, the design of the cryostat allows the investigation of different catalyst materials regarding the catalytic activity and possible degradation by using a known para concentration for the measurement.

  5. Influence of size effects on para-dichlorobenzene lattice dynamics

    NASA Astrophysics Data System (ADS)

    Korshunov, M. A.

    2010-05-01

    We have obtained experimental low-frequency Raman spectra for light scattering by nanoparticles of para-dichlorobenzene of size ˜300-70 nm. As their sizes decrease, the line frequencies decrease. The size of the nanoparticles was determined using an electron microscope. We found that in the lattice vibrational spectrum of nanoparticles of size 300-70 nm, a summed spectrum appears from ?- para-dichlorobenzene and ?- para-ichlorobenzene. This is consistent with molecular dynamics calculations of the structure of the nanoparticle and calculations of the histograms for the lattice vibrational spectra by the Dean method.

  6. Kinetics and mechanism of benzyl para -chlorophenyl ketone oxidation

    Microsoft Academic Search

    O. A. Revkov; S. G. Voronina; A. L. Perkel’

    2007-01-01

    The oxidation of benzyl para-chlorophenyl ketone in chlorobenzene at 100C occurs through the formation of short chains. Non-peroxide reaction products\\u000a (1-(4-chlorophenyl)-2-hydroxy-2-phenyl-1-ethanone, para-chlorobenzyl, benzaldehyde, and para-chlorobenzoic acid) are formed not only by the transformation of hydroperoxide (1-(4-chlorophenyl)-2-hydroxy-2-phenyl-1-ethanone)\\u000a but also (or solely) through the recombination of ?-ketoperoxyl radicals with or without chain termination. ?-Hydroperoxide\\u000a decomposes predominantly through a heterolytic route to form

  7. Vibronic Spectroscopy of a Nitrile/Isonitrile Isoelectronic Pair: para-Diisocyanobenzene and para-Isocyanobenzonitrile.

    PubMed

    Mehta-Hurt, Deepali N; Korn, Joseph A; Gutberlet, Anna K; Zwier, Timothy S

    2015-03-26

    The ultraviolet spectroscopy of isoelectronic pair para-diisocyanobenzene (pDIB) and para-isocyanobenzonitrile (pIBN) has been studied under gas-phase, jet-cooled conditions. These molecules complete a sequence of mono and disubstituted nitrile/isonitrile benzene derivatives, enabling a comparison of the electronic effects of such substitution. Utilizing laser-induced fluorescence (LIF) and resonant two-photon ionization (R2PI) spectroscopy, the S0-S1 electronic origins of pDIB and pIBN have been identified at 35?566 and 35?443 cm(-1), respectively. In pDIB, the S0-S1 origin is very weak, with b3g fundamentals induced by vibronic coupling to the S2 state dominating the spectrum at 501 cm(-1) (?17, isocyano bend) and 650 cm(-1) (?16, ring distortion). The spectrum extends over 5000 cm(-1), remaining sharp and relatively uncongested over much of this range. Dispersed fluorescence (DFL) spectra confirm the dominating role played by vibronic coupling and identify Franck-Condon active ring modes built off the vibronically-induced bands. In pDIB, the S2 state has been tentatively observed at about 6100 cm(-1) above the S0-S1 origin. In pIBN, the S0-S1 origin is considerably stronger, but vibronic coupling still plays an important role, involving fundamentals of b2 symmetry. The bending mode of the nitrile group dominates the vibronically-induced activity. Calculations carried out at the TD-DFT B3LYP/6-31+G(d) level of theory account for the extremely weak S0-S1 oscillator strength of pDIB and the larger intensity of the S0-S1 origins of pIBN and pDCB (para-dicyanobenzene) as nitrile groups are substituted for isonitrile groups. In pDIB, a nearly perfect cancellation of transition dipoles occurs due to two one-electron transitions that contribute nearly equally to the S0-S1 transition. The spectra of both molecules show no clear evidence of charge-transfer interactions that play such an important role in some cyanobenzene derivatives. PMID:25699407

  8. Preguntas para hacerle al doctor acerca del cáncer

    Cancer.gov

    Serie de preguntas, organizadas por tema, que los pacientes con cáncer pueden hacerle al médico o a otros miembros de su equipo de atención médica para conocer más acerca de su tipo de cáncer y lo que pueden esperar.

  9. DIANA: Anlisis del discurso para la comprensin del conocimiento

    E-print Network

    Rosso, Paolo

    DIANA: Análisis del discurso para la comprensión del conocimiento DIANA: DIscourse ANAlysis by the Spanish Ministry of Economy and Competitiveness. Paolo Rosso coordinates the DIANA project and leads

  10. Inmunoterapia: Uso del sistema inmunitario para tratar el cáncer

    Cancer.gov

    Resumen de los métodos de inmunoterapia utilizados para tratar el cáncer, tales como el uso de anticuerpos monoclonales, transferencia celular adoptiva, vacunas de tratamiento contra el cáncer y sustancias modificadoras de la respuesta inmunitaria.

  11. Control del dolor: Apoyo para las personas con cáncer

    Cancer.gov

    Libro sobre el control del dolor en pacientes con cáncer. Cubre los métodos y medicinas, así como los efectos físicos y emocionales del dolor. Es una adaptación cultural para el público de habla hispana del libro en inglés Pain Control.

  12. La terapia hormonal para la menopausia y el cáncer

    Cancer.gov

    Hoja informativa acerca de los resultados de los estudios sobre el uso de la terapia hormonal para la menopausia. Incluye información sobre el efecto de esta terapia en el cuerpo y explica los riesgos y beneficios del uso de hormonas.

  13. DEPARTAMENTO DE INGENIERIA INFORMATICA Normativas para el Programa Doctorado del

    E-print Network

    Autonoma de Madrid, Universidad

    DEPARTAMENTO DE INGENIERIA INFORMATICA Normativas para el Programa Doctorado del Departamento de Valiente, 11. Madrid, 28049. Teléfono: 914972230 #12;DEPARTAMENTO DE INGENIERIA INFORMATICA 4. Una vez

  14. MANUAL PARA EL ANLISIS ECONMICO DE REAS NATURALES PROTEGIDAS EN

    E-print Network

    Enríquez Andrade, Roberto Ramón

    VOLUMEN 3 INSTRUMENTOS, ESTRATEGIAS E INCENTIVOS ECONÓMICOS PARA LA CONSERVACIÓN EN LAS ÁREAS NATURALES.3. ¿Regulación directa o instrumentos económicos?......................................... 4 1.4. El contexto goce o aprovechamiento...................................... 19 5. Instrumentos financieros

  15. Mensaje para alumnos y padres - Duration: 3:01.

    NASA Video Gallery

    El astronauta de la NASA José Hernández alienta a los estudiantes a que sigan sus sueños. Hernández también habla acerca del papel que juegan los padres para ayudar a que sus hijos hagan realidad s...

  16. Preguntas para el doctor si tiene un cáncer avanzado

    Cancer.gov

    Serie de preguntas que los pacientes con cáncer pueden hacerle al médico sobre las opciones de tratamiento si el cáncer es avanzado, las formas de controlar los síntomas y cómo prepararse para la etapa final de la vida.

  17. 40 CFR 721.9520 - Methylated-para-rosaniline salt of a trisulfonated triarylmethane dye (generic).

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... false Methylated-para-rosaniline salt of a trisulfonated triarylmethane dye...9520 Methylated-para-rosaniline salt of a trisulfonated triarylmethane dye...generically as methylated-para-rosaniline salt of a trisulfonated triarylmethane...

  18. 40 CFR 721.9520 - Methylated-para-rosaniline salt of a trisulfonated triarylmethane dye (generic).

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... false Methylated-para-rosaniline salt of a trisulfonated triarylmethane dye...9520 Methylated-para-rosaniline salt of a trisulfonated triarylmethane dye...generically as methylated-para-rosaniline salt of a trisulfonated triarylmethane...

  19. Cooling by conversion of para to ortho-hydrogen

    NASA Technical Reports Server (NTRS)

    Sherman, A. (inventor)

    1983-01-01

    The cooling capacity of a solid hydrogen cooling system is significantly increased by exposing vapor created during evaporation of a solid hydrogen mass to a catalyst and thereby accelerating the endothermic para-to-ortho transition of the vapor to equilibrium hydrogen. Catalyst such as nickel, copper, iron or metal hydride gels of films in a low pressure drop catalytic reactor are suitable for accelerating the endothermic para-to-ortho conversion.

  20. Pasanta en TICs para el Carlos Rey Moreno

    E-print Network

    Autonoma de Madrid, Universidad

    EHAS 3 en Perú con GTR-PUCP Objetivo Madrid: Desarrollo software para la mejora de la metodología de1 Pasantía en TICs para el desarrollo Carlos Rey Moreno I.T.T Sistemas de Telecomunicación UC3M MSc Relaciones Internacionales y Desarrollo AAU Investigador Fundación EHAS Actividades académicas en Cooperación

  1. Para hydrogen equilibration in the atmospheres of the outer planets

    NASA Technical Reports Server (NTRS)

    Conrath, Barney J.

    1986-01-01

    The thermodynamic behavior of the atmospheres of the Jovian planets is strongly dependent on the extent to which local thermal equilibration of the ortho and para states of molecular hydrogen is achieved. Voyager IRIS data from Jupiter imply substantial departures of the para hydrogen fraction from equilibrium in the upper troposphere at low latitudes, but with values approaching equilibrium at higher latitudes. Data from Saturn are less sensitive to the orth-para ratio, but suggest para hydrogen fractions near the equilibrium value. Above approximately the 200 K temperature level, para hydrogen conversion can enhance the efficiency of convection, resulting in a substantial increase in overturning times on all of the outer planets. Currently available data cannot definitively establish the ortho-para ratios in the atmospheres of Uranus and Neptune, but suggest values closer to local equilibrium than to the 3.1 normal ratio. Modeling of sub-millimeter wavelength measurements of these planets suggest thermal structures with frozen equilibrium lapse rates in their convective regions.

  2. ParaText : scalable text modeling and analysis.

    SciTech Connect

    Dunlavy, Daniel M.; Stanton, Eric T.; Shead, Timothy M.

    2010-06-01

    Automated processing, modeling, and analysis of unstructured text (news documents, web content, journal articles, etc.) is a key task in many data analysis and decision making applications. As data sizes grow, scalability is essential for deep analysis. In many cases, documents are modeled as term or feature vectors and latent semantic analysis (LSA) is used to model latent, or hidden, relationships between documents and terms appearing in those documents. LSA supplies conceptual organization and analysis of document collections by modeling high-dimension feature vectors in many fewer dimensions. While past work on the scalability of LSA modeling has focused on the SVD, the goal of our work is to investigate the use of distributed memory architectures for the entire text analysis process, from data ingestion to semantic modeling and analysis. ParaText is a set of software components for distributed processing, modeling, and analysis of unstructured text. The ParaText source code is available under a BSD license, as an integral part of the Titan toolkit. ParaText components are chained-together into data-parallel pipelines that are replicated across processes on distributed-memory architectures. Individual components can be replaced or rewired to explore different computational strategies and implement new functionality. ParaText functionality can be embedded in applications on any platform using the native C++ API, Python, or Java. The ParaText MPI Process provides a 'generic' text analysis pipeline in a command-line executable that can be used for many serial and parallel analysis tasks. ParaText can also be deployed as a web service accessible via a RESTful (HTTP) API. In the web service configuration, any client can access the functionality provided by ParaText using commodity protocols ... from standard web browsers to custom clients written in any language.

  3. Sistemas Correctores de Campo Para EL Telescopio Cassegrain IAC80

    NASA Astrophysics Data System (ADS)

    Galan, M. J.; Cobos, F. J.

    1987-05-01

    El proyecto de instrumentación de mayor importancia que ha tenido el Instituto de Astrofisica de Canarias en los últimos afios ha sido el diseflo y construcción del te1escopio IAC8O. Este requería del esfuerzo con junto en mec´nica, óptica y electrónica, lo que facilitó la estructuración y el crecimiento de los respectivos grupos de trabajo, que posteriormente se integraron en departamentos En su origen (1977), el telescopio IAC80 fue concebido como un sistema clásico tipo Cassegrain, con una razón focal F/i 1.3 para el sistema Casse grain y una razón focal F/20 para el sistema Coudé. Posteriormente, aunque se mantuvo la filosofia de que el sistema básico fuera el F/11.3, se consideró conveniente el diseño de secundarios para razones focales F/16 y F/32, y se eliminó el de F/20. Sin embargo, dada la importancia relativa que un foco estrictamente fotográfico tiene en un telescopio moderno, diseñado básicamente para fotometría fotoeléctrica y con un campo util mínimamente de 40 minutos de arco, se decídió Ilevar a cabo el diseño de un secundario F/8 con un sistema corrector de campo, pero que estuviera formado únicamente por lentes con superficies esféricas para que asl su construcción fuera posible en España ó en México. La creciente utilización de detectores bidimensionales para fines de investigación astron6mica y la viabilidad de que en un futuro cercano éstos tengan un área sensible cada vez mayor, hicieron atractiva la idea de tener diseñado un sistema corrector de campo para el foco primario (F/3), con un campo útil mínimo de un grado, y también con la limitante de que sus componentes tuvieron sólamente supérficies esféricas. Ambos diseños de los sis-temas correctores de campo se llevaron a cabo, en gran medida, como parte de un proyecto de colaboración e intercambio en el área de diseño y evaluación de sistemas ópticos.

  4. Evolution of invertebrate deuterostomes and Hox/ParaHox genes.

    PubMed

    Ikuta, Tetsuro

    2011-06-01

    Transcription factors encoded by Antennapedia-class homeobox genes play crucial roles in controlling development of animals, and are often found clustered in animal genomes. The Hox and ParaHox gene clusters have been regarded as evolutionary sisters and evolved from a putative common ancestral gene complex, the ProtoHox cluster, prior to the divergence of the Cnidaria and Bilateria (bilaterally symmetrical animals). The Deuterostomia is a monophyletic group of animals that belongs to the Bilateria, and a sister group to the Protostomia. The deuterostomes include the vertebrates (to which we belong), invertebrate chordates, hemichordates, echinoderms and possibly xenoturbellids, as well as acoelomorphs. The studies of Hox and ParaHox genes provide insights into the origin and subsequent evolution of the bilaterian animals. Recently, it becomes apparent that among the Hox and ParaHox genes, there are significant variations in organization on the chromosome, expression pattern, and function. In this review, focusing on invertebrate deuterostomes, I first summarize recent findings about Hox and ParaHox genes. Next, citing unsolved issues, I try to provide clues that might allow us to reconstruct the common ancestor of deuterostomes, as well as understand the roles of Hox and ParaHox genes in the development and evolution of deuterostomes. PMID:21802045

  5. Study on cross-reactivity to the para group.

    PubMed

    Picardo, M; Cannistraci, C; Cristaudo, A; De Luca, C; Santucci, B

    1990-01-01

    In 80 patients, positive to at least one hapten of the para group (para-phenylenediamine, diaminodiphenylmethane, benzocaine, PPD mix), patch tests were carried out with freshly prepared solutions of para-phenylenediamine (PPD) and of 3 selected aromatic compounds related structurally to PPD (para-aminophenol, ortho-aminophenol, hydroquinone). The number of positive reactions correlated with the rate of decomposition of the substances as evaluated by high-pressure liquid chromatography. PPD, which was almost decomposed after 24 h, gave the highest number of positive reactions, followed by ortho-aminophenol and by para-aminophenol, while hydroquinone, which was oxidized to the extent of 35%, did not give any reactions. To evaluate if a different rate of oxidation can modify the patch test response, in the same patients and in 10 normal volunteers, tests were carried out with PPD solutions containing the oxidizing agent silver oxide (0.1%). By this procedure a significant increase in the number of positive responses was observed. The results suggest that the rate of decomposition and therefore the amount of quinone(s) generated, might be the key to eliciting patch test responses to oxidizable aromatic haptens. PMID:2242776

  6. El uso de la neuromodulación para el tratamiento del temblor

    PubMed Central

    Bendersky, Damián; Ajler, Pablo; Yampolsky, Claudio

    2014-01-01

    Introducción: El temblor puede ser un desorden incapacitante y el tratamiento de primera línea para estos pacientes es farmacológico. Sin embargo, este tratamiento puede llevar a una reducción satisfactoria del temblor en sólo el 50% de los pacientes con temblor esencial. La talamotomía era el tratamiento de elección para el temblor refractario al tratamiento médico hasta que comenzó a utilizarse la estimulación cerebral profunda (ECP) del núcleo ventral intermedio (Vim) del tálamo. En la actualidad, raramente se realiza la talamotomía. Métodos: Este artículo es una revisión no sistemática de las indicaciones, resultados, parámetros de programación y técnica quirúrgica de la ECP del Vim para el tratamiento del temblor. Resultados: Aunque los resultados clínicos son similares usando la talamotomía o la ECP del Vim, la primera causa más efectos adversos que la última. Además, la ECP puede ser usada bilateralmente, mientras que la talamotomía tiene un alto riesgo de causar disartria cuando se realiza de ambos lados. La ECP del Vim logró una adecuada mejoría del temblor en varias series de pacientes con temblor causado por temblor esencial, enfermedad de Parkinson o esclerosis múltiple. Además del Vim, hay otros blancos que están siendo usados por varios autores, tales como la zona incerta y las radiaciones prelemniscales. Conclusión: La ECP del Vim es un tratamiento útil para el temblor incapacitante refractario al tratamiento médico. Es esencial realizar una precisa selección de pacientes, así como utilizar una técnica quirúrgica correcta. Aún se desconoce el mejor blanco estereotáctico para el temblor, aunque el Vim es el más usado. PMID:25165613

  7. Hox and ParaHox genes: a review on molluscs.

    PubMed

    Biscotti, Maria Assunta; Canapa, Adriana; Forconi, Mariko; Barucca, Marco

    2014-12-01

    Hox and ParaHox genes are involved in patterning the anterior-posterior body axis in metazoans during embryo development. Body plan evolution and diversification are affected by variations in the number and sequence of Hox and ParaHox genes, as well as by their expression patterns. For this reason Hox and ParaHox gene investigation in the phylum Mollusca is of great interest, as this is one of the most important taxa of protostomes, characterized by a high morphological diversity. The comparison of the works reviewed here indicates that species of molluscs, belonging to different classes, share a similar composition of Hox and ParaHox genes. Therefore evidence suggests that the wide morphological diversity of this taxon could be ascribed to differences in Hox gene interactions and expressions and changes in the Hox downstream genes rather than to Hox cluster composition. Moreover the data available on Hox and ParaHox genes in molluscs compared with those of other Lophotrochozoa shed light on the complex and controversial evolutionary histories that these genes have undergone within protostomes. PMID:25394269

  8. Un algoritmo para la deteccion de horizonte en dispositivos voladores radiocontrolados

    Microsoft Academic Search

    Pablo Odorico; Claudio Delrieux

    Presentamos un algoritmo para la deteccion no supervisada en tiempo real del hori- zonte en imagenes de video. El mismo estad isenado para ser implementado en dispositivos autonomos de bajo costo y capacidad de computo (microcontroladores), como para ser incorporados en veh´õculos voladores no tripulados (UAVs). Esto permitiral a obtencion de informacion indispensable para la orientacion, navegacion, georeferenciamiento y la

  9. Usina de ciências: um espaço pedagógico para aprendizagens múltiplas

    NASA Astrophysics Data System (ADS)

    Martin, V. A. F.; Poppe, P. C. R.; Orrico, A. C. P.; Pereira, M. G.

    2003-08-01

    Entendemos que o Ensino de Astronomia é especialmente apropriado para motivar os alunos e aprofundar conteúdos em diversas áreas do conhecimento, pois envolve temas ligados à Física, Matemática, Química, Computação, Tratamento de Imagens e Instrumentação de Alta Precisão, além daqueles pertinentes as áreas de Geografia, História e Antropologia. Contudo, apesar do caráter interdisciplinar que esta ciência possui, a realidade atual é que a maioria dos professores em sala de aula não foram devidamente capacitados, durante o período de formação acadêmica, para ministrar conteúdos de Astronomia nos atuais Ensinos Fundamental e Médio. Neste trabalho, discutiremos de maneira ampla, num primeiro momento, a realidade do atual ensino de ciências praticado no Estado da Bahia, apontando por dependência administrativa, o crescimento e a redução do número de escolas, da taxa de analfabetismo por faixa etária, da escolarização, do atendimento, da aprovação, reprovação e abandono, de equipamentos e laboratórios e o grau de formação dos nossos atuais professores em pleno exercício de atividade docente. Num segundo momento, discutiremos o papel do Observatório Astronômico Antares/UEFS dentro desse contexto, ou seja, suas ações implementadas ao longo dos últimos anos e em particular, o recente projeto de extensão Ensino e Difusão de Astronomia, financiado pela Fundação Vitae, que procura traduzir no lúdico, no brincar de ciências, um espaço pedagógico para aprendizagens múltiplas. Neste, o papel do professor multiplicador associado ao laboratório de kits didáticos, de fácil construção e manipulação (alguns dos quais serão mostrados), perfazem os principais veículos para o desenvolvimento de conhecimentos, atitudes, habilidades e valores que preparam os nossos alunos para a carreira técnico-científica e para sua participação crítica e criativa na Sociedade.

  10. Estudiar las redes sociales: Aportes y perspectivas para las

    E-print Network

    Paris-Sud XI, Université de

    Estudiar las redes sociales: Aportes y perspectivas para las ciencias sociales Claire Bidart LEST muchas razones en interesarse en las redes socia- les. Estos sistemas relacionales construyen lazos entre estructuracio- nes, sus dinámicas. Transversales a los grupos y a las estructuras sociales glo- bales, las redes

  11. Reconocimiento robusto de marcadores artificiales para la navegacion de robots

    E-print Network

    Escolano, Francisco

    cambios de escala. Los experimentos demuestran que nuestra soluci´on es r´apida y muy robusta incluso en Introducci´on Dentro del campo de investigaci´on dedicado a la navegaci´on de robots, son mu- chos los experimentos. 2 Histogramas polares Los histogramas polares son definidos como un medio para comparar s

  12. actuar en el Sur y para el Sur

    E-print Network

    Páginas 06-07 Recursos para la investigación El IRD en 2013 Investigaciones de excelencia La Agencia desarrollo. Así, las investigaciones sobre el cambio climático, la gestión de los recursos, la biodiversidad lado, de una progresión cuanti- tativa y cualitativa de las publicaciones del IRD y la tasa de copu

  13. CHAMADA PARA APRESENTAO DE PROPOSTAS Programa Santander TOP USA MASSACHUSETSS

    E-print Network

    Chaimowicz, Luiz

    CHAMADA PARA APRESENTAÇÃO DE PROPOSTAS Programa Santander TOP USA MASSACHUSETSS O Diretor de Relações Internacionais da Universidade Federal de Minas Gerais, Prof. Eduardo Viana Vargas, no uso de suas EUA, no âmbito do Programa Santander TOP USA MASSACHUSSETSS, gerenciado UNICAMP conforme

  14. Acerca del Centro para la Salud Mundial del NCI

    Cancer.gov

    El Centro para la Salud Mundial (CGH) coordina y fija las prioridades en las actividades que lleva a cabo el Instituto Nacional del Cáncer a nivel mundial. Su objetivo es avanzar la investigación mundial del cáncer y reducir las muertes causadas por esta enfermedad.

  15. Sistemas de ayuda inteligente para entornos informáticos complejos

    Microsoft Academic Search

    Baltasar Fernández Manjón

    2001-01-01

    Los sistemas de ayuda inteligente (SAI) o asistentes inteligentes son una propuesta para mejorar el aprendizaje y el rendimiento en la utilización de entornos informáticos complejos. Habitualmente la ayuda tiene como único fin la mejora del rendimiento del usuario, pero nosotros creemos que dicha asistencia debe tener también un propósito educativo. Si el usuario mejora su conocimiento sobre la aplicación

  16. Propuestas para la formación de conceptos en informática

    Microsoft Academic Search

    Dora Mercedes Pérez Mok; Idalmis Urgellés Castillo

    2011-01-01

    Las tecnologías de la informática (TI) imponen poner en práctica estrategias comunicativas y educativas para establecer nuevas formas de enseñanza y aprendizaje. La enseñanza-aprendizaje de la Informática es una problemática actual. En que es necesario estudiarla, no son muchos los que se disgregan; pero en qué y cómo enseñar, si existen grandes divergencias de criterios y enfoques. En este trabajo

  17. ELABORACION DE ALGORITMOS DE PRUEBA PARA RELES DE PROTECCION

    E-print Network

    Boyer, Edmond

    protección de naturaleza electrónica digital; estos mismos, para su control periódico requieren de pruebas nature; these same ones, for their periodic control require of tests with the object of corroborating with the equipment PULSAR. 1. INTRODUCCION La continuidad y la calidad del servicio son dos requisitos íntimamente

  18. Para-acetabular periarthritis calcarea: Its radiographic manifestations

    Microsoft Academic Search

    Akira Kawashima; Sadayuki Murayama; Toshiyuki Ohuchida; Walter J. Russell

    1988-01-01

    On retrospective reviews of radiographs, periarthritis calcarea was distinguished from os acetabula by interval radiographic progression and regression. Among 59 men and 51 women, there were 137 instances of para-acetabular calcifications and ossifications, which were morphologically classified as 58 discrete, 58 amorphous, and 21 segmented types. Correlations with other radiographic abnormalities, symptoms, signs, and laboratory abnormalities were sought, but not

  19. Una Arquitectura para una Herramienta de Patrones de Diseo

    E-print Network

    Molina, Jesús García

    Una Arquitectura para una Herramienta de Patrones de Diseño José Sáez Martínez1 , Jesús García herramientas es necesario disponer de una arquitectura flexible que permita manipularlos eficientemente. Este trabajo presenta una arquitectura, basada a su vez en patrones, diseñada con este fin y describe una

  20. Para-[18F]-fluorohippurate [ [18F]-PFH

    E-print Network

    Levin, Judith G.

    are evaluating the use of dynamic SPECT or positron emission tomography (PET) to assess kidney function to evaluate kidney function and perform renography with PET, para-18F-fluorohippurate ([18F]-PFH), a renal emission tomography (PET) Source of signal / contrast: 18F Activation: No Studies: · In vitro · Rodents

  1. IMAGEN TRIDIMENSIONAL DE SUSTRATOS BIODEGRADABLES PARA SOPORTE CELULAR

    Microsoft Academic Search

    Leoncio Garrido

    En la última década se ha despertado un gran interés en investigar y desarr ollar biomateriales con propiedades óptimas para la reparación y regeneración de tejidos 1. Idealmente, el objetivo es obtener una estructura extracelular que, después de proporcionar soporte inicial a las células, se reabsorba durante la regeneración del t ejido y finalmente sea remplazada completamente sin perjuicio o

  2. Recursos financieros Familias confan en varios recursos para pagar costos

    E-print Network

    Recursos financieros Familias confían en varios recursos para pagar costos universitarios. Cuando Recursos personales que ya tienen Recursos financieros que pueden buscar Las fechas de vencimiento de la contribuido tu familia ha este fondo? Recursos financieros que tú puedes buscar Llenar la solicitud por ayuda

  3. Ambiente para la Captura y Administración de Versiones de Modelos

    Microsoft Academic Search

    Diego Sánchez Schenone; Silvio Gonnet; Horacio Leone

    El proceso de desarrollo de modelos para la gestión, investigación, producción, etc., en general involucra actividades creativas, que frecuentemente son poco estructuradas, es decir, no existe un flujo de trabajo definido previamente. Durante este proceso se genera un gran número de modelos de distinto nivel de abstracción del objeto que se desarrolla, el cual puede consistir en un sistema de

  4. Analyzing and Visualizing Cosmological Simulations with ParaView

    SciTech Connect

    Woodring, Jonathan [Los Alamos National Laboratory (LANL); Heitmann, Katrin [ORNL; Ahrens, James P [ORNL; Fasel, Patricia [Los Alamos National Laboratory (LANL); Hsu, Chung-Hsing [ORNL; Habib, Salman [ORNL; Pope, Adrian [Los Alamos National Laboratory (LANL)

    2011-01-01

    The advent of large cosmological sky surveys - ushering in the era of precision cosmology - has been accompanied by ever larger cosmological simulations. The analysis of these simulations, which currently encompass tens of billions of particles and up to a trillion particles in the near future, is often as daunting as carrying out the simulations in the first place. Therefore, the development of very efficient analysis tools combining qualitative and quantitative capabilities is a matter of some urgency. In this paper, we introduce new analysis features implemented within ParaView, a fully parallel, open-source visualization toolkit, to analyze large N-body simulations. A major aspect of ParaView is that it can live and operate on the same machines and utilize the same parallel power as the simulation codes themselves. In addition, data movement is in a serious bottleneck now and will become even more of an issue in the future; an interactive visualization and analysis tool that can handle data in situ is fast becoming essential. The new features in ParaView include particle readers and a very efficient halo finder that identifies friends-of-friends halos and determines common halo properties, including spherical overdensity properties. In combination with many other functionalities already existing within ParaView, such as histogram routines or interfaces to programming languages like Python, this enhanced version enables fast, interactive, and convenient analyses of large cosmological simulations. In addition, development paths are available for future extensions.

  5. Modelo para la Integración de Tecnologías en Educación Superior

    Microsoft Academic Search

    Pedro A. Willging; Norma I. Scagnoli

    Abstract En este trabajo se discute un modelo para la incorporaciónde tecnologías en educación superior. Este modelo surge a partir de un proyecto de investigaciónque está siendo desarrollado en conjunto por investigadores de la Universidad Nacional de La Pampa (Argentina) y de la Universidad de Illinois (USA). La colaboración interdisciplinaria de docentes e investigadorescon experiencia en las áreas de e-learning

  6. EL APORTE DE LA NEUROCIENCIA PARA LA FORMACIÓN DOCENTE

    Microsoft Academic Search

    Susan Francis Salazar

    2005-01-01

    Resumen: El siguiente artículo se propone, a partir del análisis de un proceso de investigación sobre el área pedagógica en los planes de formación docente, realizar una invitación a la incorporación del estudio del cerebro humano, como eje dentro de la formación profesional para el ejercicio docente. La capacidad de educabilidad propia de los seres humanos tiene su explicación sobre

  7. Terapias adyuvantes y neoadyuvantes para el cáncer de seno

    Cancer.gov

    Hoja informativa que explica las terapias adyuvantes (tratamiento que se administra además de la terapia primaria para aumentar la posibilidad de supervivencia a largo plazo) y las neoadyuvantes (terapia que se administra antes de la terapia principal). Contiene información sobre los efectos secundarios y sobre los riesgos y beneficios de estas terapias.

  8. Marvin, robô construtor para competição em robótica móvel

    Microsoft Academic Search

    André Martin Narciso; Carlos Augusto; Bentes da Silva; Jackson Paul Matsuura

    renatohsp@gmail .com Resumo: Este artigo é sobre a construção do robô autônomo Marvin o Construtor, que foi construído para participar da IV Competição IEEE Brasileira de Robô. A tarefa consiste em empilhar blocos em uma área predeterminada em um menor tempo possível, ganha a torre mais alta. O robô, construído por alunos do Instituto Tecnológico de Aeronáutica (ITA), foi construído

  9. O JORNAL ESCOLAR: INSTRUMENTO PARA A FORMAÇÃO CRÍTICA E CIDADÃ

    Microsoft Academic Search

    Rosana Cristina DA CUNHA

    RESUMO: Neste relato de pesquisa, pretendo analisar a viabilidade de se trabalhar, na escola, com a produção do jornal escolar como recurso para mobilizar uma série de ações visando à promoção, no aluno, da consciência crítica dos usos da linguagem no mundo e da sua formação enquanto ser participativo e agente em questões que lhe dizem respeito dentro e fora

  10. Algoritmo genetico para o problema de rotas de cobertura multiveiculo

    E-print Network

    Gomes, Francisco A. M.

    Algoritmo gen´etico para o problema de rotas de cobertura multive´iculo Washington Alves de¸c~oes sub´otimas s~ao obtidas aplicando-se duas propostas de algoritmo gen´etico (AG), os quais geram rotas de tamanho menor poss´ivel. Palavras-chave: Programa¸c~ao inteira e combinat´oria, algoritmo gen´etico

  11. Creciendo Juntos Plan de la Universidad de Columbia para

    E-print Network

    Hone, James

    proyecto de reubicación y reconstrucción de utilidades para sustituir alcantarillado y tuberías de agua y calles 129th y 125th a un ya existente regulador del alcantarillado en la avenida 12th. Columbia adjudicó

  12. Anise oil as para-methoxyamphetamine (PMA) precursor

    Microsoft Academic Search

    Dieter Waumans; Noël Bruneel; Jan Tytgat

    2003-01-01

    These days, MDMA is one of the most popular drugs of abuse. Due to its illegality, MDMA and its chemical precursors are watched by governmental organizations in many countries. To avoid conflicts with legal instances, underground chemists have tried to market several new unregulated amphetamine analogues, such as 4-MTA. Para-methoxyamphetamine (PMA), on the other hand, is regulated by law but

  13. ACUTE TOXICITY OF PARA-NONYLPHENOL TO SALTWATER ANIMALS

    EPA Science Inventory

    ?para-Nonylphenol (PNP), a mixture of alkylphenols used in producing nonionic surfactants, is distributed widely in surface waters and aquatic sediments, where it can affect saltwater species. This article describes a database for acute toxicity of PNP derived for calculating a n...

  14. UN ESQUEMA ADAPTATIVO PARA LA COMPRESION DE IMAGENES

    E-print Network

    Amat, Sergio

    art´iculo de Amat, Ar`andiga, Cohen, Donat, Garc´ia y von Oehsen titulado "Data compresion with ENOUN ESQUEMA ADAPTATIVO PARA LA COMPRESION DE IMAGENES En la era de la comunicaci´on en la que la compresi´on de im´agenes. Con compresi´on nos referimos a tener una versi´on de la foto original

  15. Subastando la Energía para Clientes Regulados: Un Análisis de Equilibrio

    Microsoft Academic Search

    Francisco Caravia; Eduardo Saavedra

    2005-01-01

    La reciente liberalización del mercado de generación eléctrica para clientes regulados autoriza a las empresas distribuidoras a contratar energía a precios que pueden ser superiores al precio nudo fijado por el regulador, traspasándolos íntegramente a sus consumidores. Motivado en esta reforma legal, este artículo analiza el equilibrio que resulta de una subasta hipotética en que una empresa distribuidora contrataría su

  16. Para lle l Support Vector Mach ines: The Cascade SVM

    E-print Network

    Bottou, Léon

    Para lle l Support Vector Mach ines: The Cascade SVM Hans Peter Graf, Eric Cosatto, Leon Bottou, leonb, igord, vlad}@nec­labs.com Abstract We describe an algorithm for support vector machines (SVM in a `Cascade' of SVMs, until the global optimum is reached. The Cascade SVM can be spread over multiple

  17. LIMITAÇÕES LOGÍSTICAS PARA EXPORTAÇÃO: O CASO DOS PRODUTOS LÁCTEOS BRASILEIROS

    Microsoft Academic Search

    Adriano Abreu Rezende; Antonio Carlos dos Santos

    2008-01-01

    O propósito desta pesquisa é avaliar a estrutura do agribusiness do leite no Brasil, identificando as principais limitações logísticas para exportação. Especificamente pretende identificar as principais empresas exportadoras de produtos lácteos, os produtos mais exportados e os países de destino; relatar as maneiras mais freqüentes de inserção dos produtos no mercado externo; e mencionar as estruturas físicas utilizadas pelas empresas

  18. Mtricas de Funcionalidad: una taxonoma para sistemas Web

    E-print Network

    Guerrero, Luis

    Muy poco de lo aprendido en ingeniería de software, se aplica en el desarrollo de sistemas Web. Esto, métricas para aplicaciones Web, aplicaciones/sitios Web. 1. Introducción El desarrollo y crecimiento del desarrollo de sitios y aplicaciones Web está caracterizado por cuatro importantes factores: (1) las

  19. Técnicas grupales para identificación de valores en estudiantes de estomatología

    Microsoft Academic Search

    Nivia Ernestina Sánchez Fernández

    2011-01-01

    Se realizó un estudio descriptivo transversal en el Centro Universitario Municipal Julio A. Mella de Guantánamo, curso escolar 2010-2011, con el objetivo de identificar los valores en los estudiantes de primer año de la carrera de Estomatología a través de técnicas grupales. El universo de estudio 19 estudiantes. Se utilizaron tres técnicas grupales. La primera para aumentar el entendimiento y

  20. NCI Anuncia Contribuciones para Incrementar Acceso de Minorías a Información sobre el Cáncer

    Cancer.gov

    El Instituto Nacional del Cáncer (NCI) anunció este mes una variedad de contribuciones que totalizan casi 1 millón de dólares para ayudar a desarrollar la investigación y programas para comprender y finalmente romper la División Digital que existe en muchas poblaciones minoritarias para el acceso y uso de la información sobre el cáncer disponible en la Internet. Las contribuciones son un esfuerzo del Servicio de Información sobre el Cáncer (CIS), dependiente de la NCI, para trabajar con grupos y organizaciones regionales para el control del cáncer para probar estrategias destinadas a aumentar las comunicaciones sobre el cáncer en comunidades deficientemente atendidas

  1. Zoneamento de riscos climáticos para a cultura de milho na Região Centro-Oeste do Brasil e para o estado de Minas Gerais Climatic risks zoning for maize production in West-Center Region and in Minas Gerais state, Brazil

    Microsoft Academic Search

    Luiz Marcelo Aguiar Sans; Eduardo Delgado Assad; Daniel Pereira Guimarães; Gisela Avellar

    2001-01-01

    Resumo - Para a cultura de milho, a água é um fator limitante, principalmente, na fase de germinação e nos períodos de floração e enchimento de grãos. Desta forma, conhecer os elementos climáticos é uma estratégia para definir manejos que possibilitem minimizar riscos climáticos, contribuindo para melhorar a política de alocação de recursos para crédito agrícola e para o aumento

  2. Um satélite brasileiro para observação do diâmetro solar

    NASA Astrophysics Data System (ADS)

    Emilio, M.; Leister, N. V.; Benevides Soares, P.; Teixeira, R.; Kuhn, J.

    2003-08-01

    Propomos uma missão espacial para medir a forma e o diâmetro solar com o objetivo de ajudar a determinar o potencial gravitacional do Sol e a sua rotação com precisão, testar modelos teóricos de variação de energia e pela primeira vez medir os modos g de oscilação. As observações serão obtidas através do instrumento denominado APT (Astrometric and Photometric Telescope) descrito por Kuhn(1983). A sensibilidade do instrumento é de 0,2 mas em 27 dias para as observações do diâmetro solar feitas a cada minuto. Esta é uma missão de três anos de duração e pode complementar as medidas que serão feitas pelo satélite PICARD (a ser lançado em 2007). Outros parâmetros físicos podem ser obtidos com as mesmas imagens o que certamente interessará à comunidade de física solar. Um primeiro contato foi realizado com a agência espacial brasileira que pretende lançar um satélite científico a cada dois anos.

  3. Para-Sasakian geometry in thermodynamic fluctuation theory

    NASA Astrophysics Data System (ADS)

    Bravetti, A.; Lopez-Monsalvo, C. S.

    2015-03-01

    In this work we tie concepts derived from statistical mechanics, information theory and contact Riemannian geometry within a single consistent formalism for thermodynamic fluctuation theory. We derive the concrete relations characterizing the geometry of the thermodynamic phase space stemming from the relative entropy and the Fisher–Rao information matrix. In particular, we show that the thermodynamic phase space is endowed with a natural para-contact pseudo-Riemannian structure derived from a statistical moment expansion which is para-Sasaki and ?-Einstein. Moreover, we prove that such manifold is locally isomorphic to the hyperbolic Heisenberg group. In this way we show that the hyperbolic geometry and the Heisenberg commutation relations on the phase space naturally emerge from classical statistical mechanics. Finally, we argue on the possible implications of our results.

  4. ANEXO DELIBERAO 01/2010 AUTORIZAO PARA PUBLICAO DE

    E-print Network

    Rodriguez, Noemi

    a publicar na rede mundial de computadores (Internet), na Biblioteca virtual da PUC-Rio, entendendo-se os certificação da obra. 2 [ ] AUTORIZO a disponibilização completa a partir de 01 (um) ano após a data da, agradecimentos, resumo, sumário. Entendo que uma nova extensão por mais 01 (um) ano para a publicação digital só

  5. The rotational excitation of methanol by para-hydrogen

    Microsoft Academic Search

    J. T. Pottage; D. R. Flower; Stephen L. Davis

    2004-01-01

    In this paper, we present the results of calculations of cross-sections and rate coefficients for rotationally inelastic transitions in methanol (CH3OH), in its ground torsional state, induced by collisions with para-H2 in its ground rotational state. The interaction potential was calculated by means of many-body perturbation theory, and the corresponding cross-sections computed using the coupled states approximation to the Schrödinger

  6. Ultrafast photogeneration mechanisms of triplet states in para-hexaphenyl

    Microsoft Academic Search

    C. Zenz; G. Cerullo; G. Lanzani; W. Graupner; F. Meghdadi; G. Leising; S. de Silvestri

    1999-01-01

    We present femtosecond pump-probe measurements, both conventional and electric field-assisted, on organic light-emitting devices based on para-hexaphenyl. The dominant triplet exciton generation mechanism is assigned to nongeminate bimolecular recombination of photogenerated, spin-12 polarons. This process is active within a few hundred femtoseconds after photoexcitation and involves about 20% of the initially excited states. At higher photoexcitation densities, we observe an

  7. arquivo Proposta de regras e tabela para progresso funcional

    E-print Network

    Floeter, Sergio Ricardo

    reconhecidos publicamente (arxiv.org, por exemplo). Livros - Pontuam-se livros e capítulos de livros por artigos e livros pontuam por obra. Nesse caso, aceita-se o comprovante de emissão de parecer emitido pelo editor do jornal, revista ou livro. Assessoria ad-hoc para órgãos de fomento pontuam por emissão de

  8. Linguagens para Programac~ao Paralela October 26, 2010

    E-print Network

    Rodriguez, Noemi

    estruturas de dados Linguagens para Programa¸c~ao Paralela #12;flat data-parallelism: HPF/Fortran90 opera 1.0 to each element of A A = SQRT(A) ! Computes square root of each element of A L = A .EQ. B ! Sets¸c~ao Paralela #12;Exemplo F77 C diferen¸cas finitas program f77_finite_diff real X(100,100), New(100,100) do i

  9. Linguagens para Programac~ao Paralela November 26, 2009

    E-print Network

    Rodriguez, Noemi

    estruturas de dados Linguagens para Programa¸c~ao Paralela #12;flat data-parallelism: HPF/Fortran90 opera 1.0 to each element of A A = SQRT(A) ! Computes square root of each element of A L = A .EQ. B ! Sets¸c~ao Paralela #12;Exemplo F77 C diferen¸cas finitas program f77_finite_diff real X(100,100), New(100,100) do i

  10. Relativistic treatment of ortho-para-H2 transitions

    NASA Astrophysics Data System (ADS)

    Dodelson, Scott

    1986-09-01

    The rate for radiative decay from ortho- to para-H2 is calculated using the quantum electrodynamical method of Feinberg and Sucher (1971). The calculation is greatly simplified by switching to the dipole length form while the fields are still second quantized. The rate, about 10 to the -12th/a, differs only slightly from that calculated by Raich and Good (1964) and is small enough to be neglected even in interstellar space.

  11. ACOR hibrido con multiples colonias para problemas de optimizacion continua

    E-print Network

    Granada, Universidad de

    tiempo. Este tipo de algo- ritmo se conoce com´unmente como un m´etodo multi- colonia. El objetivo de la este tipo de algoritmos hacia un m´etodo multi-colonia para incrementar la capacidad de ex- ploraci, y los m´etodos de BL utilizados, SW y Simplex. En la Secci´on IV se ex- plica como se hace la

  12. Uma simulao do QuicktimeVR para mundos poligonais

    E-print Network

    a tecnologia de image-based rendering para realidade virtual. Essa abordagem consiste em se obter um número de ressaltar que a tecnologia de image-based rendering se propõe a reconstruir visões do ambiente e não o ambiente propriamente dito. #12;3 Essa tecnologia no entanto é relativamente nova e muito ainda há que ser

  13. Nuclear Quadrupole Resonance Zeeman Study of paraChlorophenol

    Microsoft Academic Search

    G. E. Peterson; P. M. Bridenbaugh

    1967-01-01

    The major field gradient directions for Cl in para-chlorophenol as determined by NQR and x-ray diffraction are compared quantitatively, and found to agree. The minor field gradient directions are examined qualitatively, and are consistent with those predicted on the basis of Cl&sngbnd;C partial double bonding. From a measurement of the field gradient asymmetry parameter &eegr;, the degree of chlorine—carbon double

  14. Un API para el desarrollo de aplicaciones paralelas 100% Java

    E-print Network

    Giménez, Domingo

    Un API para el desarrollo de aplicaciones paralelas 100% Java Antonio Talón Toledo 5º curso de://www.cs.rit.edu/~ark/pj.shtml) · PJ es software libre que se distribuye bajo los términos de la GNU General Public License (http sobre un cluster #12;· Web del autor: http://www.cs.rit.edu/~ark/pj.shtml · Descargas: binario y fuentes

  15. Edukalibre: una herramienta para la creacion colaborativa de material didactico

    Microsoft Academic Search

    Diego Chaparro; Teofllo Romera

    El Software Libre, con sus caracter¶‡sticas y su particular modelo de desarrollo, ha permitido la creacion de un conjunto de metodolog¶‡as de trabajo en grupo que han resultado satisfactorias en gran cantidad diferentesambitos. En este sentido, el proyecto Edukalibre importa y adapta estas metodolog¶‡as para ser aplicadas en la creacion y man- tenimiento de documentacion en elambito de la educacion.

  16. Consistent Assignment of the Vibrations of Para Disubstituted Benzene Molecules

    NASA Astrophysics Data System (ADS)

    Andrejeva, Anna; Lee, Alison Jasmin; Wright, Tim

    2014-06-01

    When disubstituted benzene molecules are considered the relative position of the substituents must be defined. The three possible forms are ortho-, meta-, and para- where the latter is investigated in this work by consideration of the effect para positioned substituents will have on the vibrational modes. The consistency of the labelling and assignment of the vibrational frequencies of the para disubstituted benzene molecules is investigated in their ground states (S0) and first electronically excited states (S1). The work extends a previously published nomenclature where ring-localised vibrations are compared straightforwardly across different monosubstituted benzene species and given the label Mi. The assignments of the frequencies include previous work but also the calculated wavenumbers for both hydrogenated disubstituted benzenes (-h4) and the deuterated isotopologues (-d4) employing density functional theory (DFT) and time-dependent density functional theory (TDDFT). A. M. Gardner and T. G. Wright, J. Chem. Phys., 135, 114305 (2011) A. M. Gardner, A. M. Green, V. M. Tame-Reyes, V. H. K. Wilton and T. G. Wright, 138, 134303 (2013) A. M. Gardner, A. M. Green, V. M. Tame-Reyes, K. L. Reid, J. A. Davies, V. H. K. Wilton and T. G. Wright, manuscript accepted

  17. Determination of the Ratio of Ortho Hydrogen and Para Hydrogen

    NASA Astrophysics Data System (ADS)

    Zhou, D.; Ihas, G. G.; Sullivan, N. S.

    2003-03-01

    The two different quantum states of hydrogen, ortho-hydrogen and para-hydrogen, possess different properties. The accurate determination of the ortho/para ratio in gaseous, liquid and solid state is important both for research needs and for applications in cryogenic engineering, such as H2 production, transport and storage. NMR can determine the ratio1 accurately, but it is cumbersome and often not practical. Cryogenic applications need a simple and reliable method. We report on the development of a thermal conductivity gauge employing a pure metal thin film that serves as both heater and thermometer for the detection of ortho-para hydrogen ratios in the gaseous state. This ratio-meter has been tested and found to have a nearly pressure-independent voltage response over a broad pressure range with a constant current. The thermal conductivity of hydrogen and nitrogen was measured and found to agree quantitatively with published data. The new development will be presented. *Thanks to Larry Phelps, Bill Malphurs, Stephen Wood, David Hernandez. # Supported by NASA Contract NAG3-2750 Ref. 1. D. Zhou, C. M. Edwards, and N. S. Sullivan, Phys. Rev. Lett. 62, 1528 (1989)

  18. Consejos para los efectos de la quimioterapia: Cambios en la memoria

    Cancer.gov

    Provee consejos prácticos para las personas que están reflejando cambios en la memoria durante la quimioterapia. Enumera síntomas que requieren que se comuniquen con su médico o enfermera e incluye preguntas para su médico o enfermera.

  19. Taller de Ciencia para J ovenes CIMAT, 20-31 julio, 1998

    E-print Network

    Bor, Gil

    ~nar los cursos de \\Ciencia para J#19;ovenes'' para alumnos de escuelas preparatorias en los a~nos 1997 of Numbers", por L. E. Dickson (The Uni- versity of Chicago Press, 1947). Un cl#19;asico del tema. Todos

  20. 1/4 CBEB 2008 SISTEMA PARA ESTIMAO DE INTENO DE MOVIMENTO EM

    E-print Network

    Carvalho, João Luiz

    2008 para a prótese, a coordenação entre os micro-controladores escravos para fazer medições de diferentes variáveis, e a geração de trajetórias de juntas. Os micro-controladores escravos utilizados são d

  1. Pitones Birmanas en Florida del Sur: Soporte Cientfico para el Manejo de Especies Invasoras1

    E-print Network

    Mazzotti, Frank

    clasificada por la Unión Internacional para la Conservación como "casi amenazada" en su rango nativo en el Sureste de Asia, debido a su exportación para el comercio como mascota y a la cacería por su piel. Miles

  2. El Centro para la Salud Mundial del NCI anuncia las primeras becas de investigación para apoyar las tecnologías portátiles

    Cancer.gov

    El Centro para la Salud Mundial del NCI (CGH) anunció el otorgamiento de subvenciones que apoyarán el desarrollo y la validación de tecnologías portátiles y de bajo costo. Estas tecnologías tienen el potencial de mejorar la detección temprana, el diagnóstico y los tratamientos no invasivos o mínimamente invasivos de varios tipos de cáncer con una prevalencia particularmente alta en ciertos países con economías de ingreso bajo y mediano.

  3. A study of the valence shell electronic structure and photoionisation dynamics of para-dichlorobenzene and para-bromochlorobenzene

    NASA Astrophysics Data System (ADS)

    Powis, I.; Trofimov, A. B.; Bodzuk, I. L.; Holland, D. M. P.; Potts, A. W.; Karlsson, L.

    2013-03-01

    The valence shell electronic structure and photoionisation dynamics of para-dichlorobenzene and para-bromochlorobenzene have been investigated both experimentally and theoretically. High resolution photoelectron spectra of the outer valence orbitals have been recorded with HeI radiation and the observed structure has been interpreted using calculated ionisation energies and spectral intensities. The theoretical predictions for the single-hole ionic states due to outer valence ionisation agree satisfactorily with the experimental results. Ionisation from the inner valence orbitals is strongly influenced by many-body effects and the with a particular orbital is spread amongst numerous satellites. Some of the photoelectron bands exhibit vibrational progressions and tentative assignments have been proposed. The photoionisation dynamics of the outer valence orbitals of para-dichlorobenzene have been investigated theoretically by using the continuum multiple scattering approach to calculate photoionisation partial cross-sections and photoelectron anisotropy parameters. The results show that ionisation from some of the orbitals is affected by the Cooper minimum associated with the chlorine atom. Synchrotron radiation has been used to record angle resolved photoelectron spectra of the entire valence shell, for photon energies between threshold and ˜100 eV, and these have allowed the corresponding experimental data to be derived. A comparison between the predicted and measured anisotropy parameters confirms the influence of the Cooper minimum in those orbitals related to the chlorine lone-pairs.

  4. Zeeman Effect of the Nuclear Quadrupole Resonance of 81Br in para-Bromophenol and 35Cl in paraChlorophenol

    Microsoft Academic Search

    P. Bucci; P. Cecchi; A. Colligiani

    1969-01-01

    The Zeeman effect of the 81Br and 35Cl nuclear quadrupole resonance has been studied with high precision on single crystals of para-bromophenol and para-chlorophenol, respectively. The results substantially agree with previous x-ray and NQR studies of para-chlorophenol (x-ray studies are known only for this substance). In p-bromophenol, four physically inequivalent sites were found, instead of two, as reported by other

  5. Um Framework para a Simulao de Redes Mveis Ad hoc Alexandre Mele & Markus Endler

    E-print Network

    Endler, Markus

    Um Framework para a Simulação de Redes Móveis Ad hoc Alexandre Mele & Markus Endler Departamento de, um framework flexível para a prototipação e simulação de protocolos para redes móveis ad hoc. Depois.11. Palavras-chave Redes Móveis Ad hoc, Framework, Simulação, Roteamento, Prototipação de Protocolos #12;Um

  6. Fondos del SBIR para el desarrollo de tecnologías de imágenes más avanzadas

    Cancer.gov

    El Programa de Investigación de la Innovación de la Pequeña Empresa (SBIR), junto con el Programa de Transferencia Tecnológica para la Pequeña Empresa (STTR), son los motores del NCI para la creación y comercialización de nuevas tecnologías para prevenir, diagnosticar y tratar el cáncer.

  7. Notas para un curso de introduccion a la Teoria de Numeros

    E-print Network

    Bor, Gil

    ´i inicialmente para acompa~nar los cursos de "Ciencia para J´ovenes" para alumnos de escuelas preparatorias en traducido al espa~nol. "Modern Elementry Theory of Numbers", por L. E. Dickson (The Univer- sity of Chicago

  8. Un Sistema de Control de Acceso para la Distribucin de Contenidos Multimedia

    E-print Network

    Sánchez Cuenca, Manuel

    para aplicar una calidad de servicio (QoS) adecuada. Aunque el control de acceso es una característicaUn Sistema de Control de Acceso para la Distribución de Contenidos Multimedia M. Sánchez1 , G que se intercambie la información necesaria para realizar las tareas de control de acceso, así como

  9. Propuesta de autorizacin para entornos Grid basada en la arquitectura NAS-SAML

    E-print Network

    Sánchez Cuenca, Manuel

    Propuesta de autorización para entornos Grid basada en la arquitectura NAS-SAML Manuel Sánchez1 que acceden a sus recursos. Se han propuesto varias arquitecturas de autorización para este tipo de como un recurso más. La arquitectura AAA fue diseñada para resolver este problema usando diferentes

  10. PLANIFICACIÓN COLABORATIVA Y UBICUA PARA EL APRENDIZAJE DEL DISEÑO EN EL SISTEMA DOMOSIM-TPC

    Microsoft Academic Search

    Miguel A. Redondo; Ana I. Molina; Crescencio Bravo; José Bravo; Manuel Ortega

    Resumen En este artículo, como punto de partida, describimos parte de nuestra experiencia en un caso de estudio particular y sobre un e scenario real en el que se trabaja para resolver una cierta problemática asociada al aprendizaje del diseño domótico. Para este caso de estudio desarrollamos un sistema para el aprendizaje colaborativo basado en los paradigmas de interacción asistida

  11. Accesibilidad para personas con debilidad auditiva Mac OS X Snow Leopard

    E-print Network

    Fernández de Córdoba, Pedro

    Accesibilidad para personas con debilidad auditiva Mac OS X Snow Leopard ASIC ­ 18 de noviembre de LEOPARD MAC OS X Snow Leopard ofrece algunas ayudas para personas sordas o con problemas para escuchar Snow Leopard ASIC ­ 18 de noviembre de 2010 Pág. 2 de 14 1. Recomendaciones previas frente al uso del

  12. Accesibilidad para personas con debilidad motriz Mac Os X Snow Leopard

    E-print Network

    Fernández de Córdoba, Pedro

    Accesibilidad para personas con debilidad motriz Mac Os X Snow Leopard ASIC ­ 18 de noviembre de LEOPARD Si usted tiene problemas para utilizar el teclado, el ratón o el trackpad de su portátil, puede para personas con debilidad motriz Mac Os X Snow Leopard ASIC ­ 18 de noviembre de 2010 Pág. 2 de 9

  13. ParA resolvase catalyzes site-specific excision of DNA from the Arabidopsis genome

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The small serine resolvase ParA from bacterial plasmids RK2 and RP4 catalyzes the recombination of two identical 133 bp recombination sites known as MRS. Previously, we reported that ParA is active in the fission yeast Schizosaccharomyces pombe. In this work, the parA recombinase gene was placed un...

  14. Females prefer carotenoid colored males as mates in the pentamorphic livebearing fish, Poecilia parae

    Microsoft Academic Search

    Godfrey R. Bourne; Felix Breden; Teresa C. Allen

    2003-01-01

    The first results of female preference and chosen male mating success in a new model organism, the pentamorphic livebearing fish, Poecilia parae, are presented. Poecilia parae is a relative of the guppy, P. reticulata, and is assumed to have similar reproductive behavior. We tested the hypothesis that P. parae females, like female guppies, prefer caretenoid colored males as mates. Here

  15. REDES TRANSACIONALES: APORTES PARA LA LECTURA SOBRE EL CASO AMERICANO DE LA ALIANZA SOCIAL CONTINENTAL

    E-print Network

    Paris-Sud XI, Université de

    del Área de Libre Comercio para las Américas (ALCA) desarrollada por un novedoso actor transnacional y recomposición sindical a nivel internacional. Estas cuestiones resultan cardinales para comprender el relieve al proyecto del Área de Libre Comercio para las Américas (ALCA) en el continente americano. Con este

  16. ANÁLISIS DE ÁRBOL DE FALLAS DEL SISTEMA DE UNA LLAVE PARA AGUA

    Microsoft Academic Search

    Rosalva Martínez Aguilar; José Francisco Rodríguez Silva

    2007-01-01

    La competitividad en las organizaciones es un factor primordial para su permanencia y desarrollo en el mercado. Para ello, los procesos de fabricación y los productos se monitorean constantemente incluso cuando están en su fase de diseño para asegurar la calidad que los clientes exigen. Los costos generados por reparaciones en las instalaciones del cliente o por la salida de

  17. Buenas prcticas para la digitalizacin de documentos destinados al repositorio Digital.CSIC

    E-print Network

    prácticas para la digitalización de documentos en el repositorio institucional Digital.CSIC: digitalización1 Buenas prácticas para la digitalización de documentos destinados al repositorio Digital instituciones culturales disponen de escáneres de mesa para uso interno del personal o de autoservicio, como

  18. Cómo cuidarse mientras usted cuida a su ser querido: Apoyo para personas que cuidan a un ser querido con cáncer

    Cancer.gov

    Un folleto para las personas responsables del cuidado de un ser querido que recibe tratamiento para el cáncer. Ofrece información práctica y apoyo para ayudarlas a sobrellevar este período difícil y estresante.

  19. Amazon Land Wars in the South of Para

    NASA Technical Reports Server (NTRS)

    Simmons, Cynthia S.; Walker, Robert T.; Arima, Eugenio Y.; Aldrich, Stephen P.; Caldas, Marcellus M.

    2007-01-01

    The South of Para, located in the heart of the Brazilian Amazon, has become notorious for violent land struggle. Although land conflict has a long history in Brazil, and today impacts many parts of the country, violence is most severe and persistent here. The purpose of this article is to examine why. Specifically, we consider how a particular Amazonian place, the so-called South of Para has come to be known as Brazil's most dangerous badland. We begin by considering the predominant literature, which attributes land conflict to the frontier expansion process with intensified struggle emerging in the face of rising property values and demand for private property associated with capitalist development. From this discussion, we distill a concept of the frontier, based on notions of property rights evolution and locational rents. We then empirically test the persistence of place-based violence in the region, and assess the frontier movement through an analysis of transportation costs. The findings from the analyses indicate that the prevalent theorization of frontier violence in Amazonia does little to explain its persistent and pervasive nature in the South of Para. To fill this gap in understanding, we develop an explanation based the geographic conception of place, and we use contentious politics theory heuristically to elucidate the ways in which general processes interact with place specific history to engender a landscape of violence. In so doing, we focus on environmental, cognitive, and relational mechanisms (and implicated structures), and attempt to deploy them in an explanatory framework that allows direct observation of the accumulating layers of the region's tragic history. We end by placing our discussion within a political ecological context, and consider the implications of the Amazon Land War for the environment.

  20. ORTHO-PARA SELECTION RULES IN THE GAS-PHASE CHEMISTRY OF INTERSTELLAR AMMONIA

    SciTech Connect

    Faure, A.; Hily-Blant, P.; Le Gal, R.; Rist, C. [UJF-Grenoble 1/CNRS-INSU, Institut de Planetologie et d'Astrophysique de Grenoble (IPAG) UMR 5274, Grenoble F-38041 (France); Pineau des Forets, G., E-mail: afaure@obs.ujf-grenoble.fr [Institut d'Astrophysique Spatiale, Universite Paris-Orsay and CNRS, Orsay (France)

    2013-06-10

    The ortho-para chemistry of ammonia in the cold interstellar medium is investigated using a gas-phase chemical network. Branching ratios for the primary reaction chain involved in the formation and destruction of ortho- and para-NH{sub 3} were derived using angular momentum rules based on the conservation of the nuclear spin. We show that the 'anomalous' ortho-to-para ratio of ammonia ({approx}0.7) observed in various interstellar regions is in fact consistent with nuclear spin selection rules in a para-enriched H{sub 2} gas. This ratio is found to be independent of temperature in the range 5-30 K. We also predict an ortho-to-para ratio of {approx}2.3 for NH{sub 2}. We conclude that a low ortho-to-para ratio of H{sub 2} naturally drives the ortho-to-para ratios of nitrogen hydrides below the statistical values.

  1. Do Well, Be Well with Diabetes 2013 1 Formulario de Conclusin para Personas con Diabetes Formulario de Conclusin para Personas con Diabetes 201

    E-print Network

    Do Well, Be Well with Diabetes ­ 2013 1 Formulario de Conclusión para Personas con Diabetes Formulario de Conclusión para Personas con Diabetes ­ 201 Si usted NO TIENE diabetes, por favor NO LLENE este últimos cuatro números de mi número telefónico son __ __ __ __. C. Marque todas las clases sobre diabetes

  2. Do Well, Be Well with Diabetes 2013 1 Formulario de Registro para Personas con Diabetes Formulario de Registro para Personas con Diabetes 2013

    E-print Network

    Do Well, Be Well with Diabetes ­ 2013 1 Formulario de Registro para Personas con Diabetes Formulario de Registro para Personas con Diabetes ­ 2013 Si usted NO TIENE diabetes, por favor NO LLENE este sobre diabetes en el Condado de _______________. D. El código postal en mi casa es __ __ __ __ __. E

  3. Una propuesta para el dise~no de m'etodos de Jacobi unilaterales por bloques para el Problema Sim'etrico de Valores Propios \\Lambda

    E-print Network

    Giménez, Domingo

    los tiempos de ejecuci'on te'oricos con los de un m'etodo bilateral por bloques. Palabras clave: m'etodosUna propuesta para el dise~no de m'etodos de Jacobi unilaterales por bloques para el Problema Sim'etrico de Valores Propios. Se estudian dos m'etodos secuenciales y sus versiones paralelas, y se comparan

  4. The infrared dielectric function of solid para-hydrogen

    E-print Network

    Kettwich, Cassie; Walker, Mark; Tuntsov, Artem

    2015-01-01

    We report laboratory measurements of the absorption coefficient of solid para-H2, within the wavelength range from 1 to 16.7 micron, at high spectral resolution. In addition to the narrow rovibrational lines of H2 which are familiar from gas phase spectroscopy, the data manifest double transitions and broad phonon branches that are characteristic specifically of hydrogen in the solid phase. These transitions are of interest because they provide a spectral signature which is independent of the impurity content of the matrix. We have used our data, in combination with a model of the ultraviolet absorptions of the H2 molecule, to construct the dielectric function of solid para-H2 over a broad range of frequencies. Our results will be useful in determining the electromagnetic response of small particles of solid hydrogen. The dielectric function makes it clear that pure H2 dust would contribute to IR extinction predominantly by scattering starlight, rather than absorbing it, and the characteristic IR absorption s...

  5. Para-Sexiphenyl Layers Grown On Light Sensitive Polymer Substrates

    NASA Astrophysics Data System (ADS)

    Hernandez-Sosa, G.; Simbrunner, C.; Höfler, T.; Moser, A.; Werzer, O.; Kunert, B.; Trimmel, G.; Kern, W.; Resel, R.; Sitter, H.

    In this contribution the deposition of Para-sexiphenyl (PSP) layers on poly (diphenyl bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylate) (PPNB) by Hot Wall Epitaxy (HWE) is reported. It is demonstrated that pre-treating the substrate by UV-illumination induces a clear change in the morphology of the grown PSP films due to the polarity modification of the substrate surface. PPNB surface polarity increases when illuminated by UV via photo-Fries rearrangement. By detailed atomic force microscopy analysis the influence on the growth kinetics by the substrate temperature, deposition time and particularly by the UVtreatment of the substrate was investigated. A high crystalline order of the films is underlined by the observation of growth spirals and terraced islands, providing mono-layer step heights of standing PSP-molecules.

  6. Photophysics of Isolated Nanostructured Poly(para-phenylenevinylene)

    NASA Astrophysics Data System (ADS)

    List, Emil J. W.; Partee, Jonathan; Shinar, Joseph; Zojer, Egbert; Markart, P.; Gadermaier, Christoph; Leising, Guenther; Smith, R.; Gin, D.; Graupner, Wilhelm

    2000-03-01

    The photophysics of bulk poly(para-phenylenevinylene) (PPV) films are compared to those of isolated PPV chains incorporated into a self-assembled lyotropic liquid-crystalline matrix ordered at the nanometer scale (nano-PPV). As expected, the optical spectra and the spectral dependence of the photoluminescence (PL)-detected magnetic resonance (PLDMR) show that the nano-PPV structure largely eliminates the interchain charge transfer excitons, allowing only intrachain migration of singlet excitons (SE´s). The observed unusual sublinear dependence of the PL on the excitation density in nano-PPV indicates that these SE´s are strongly nonradiatively quenched at trapped polarons. A rate-equation model based on this quenching mechanism provides strong evidence that this quenching process is responsible for the polaron PLDMR. *Operated by ISU for the USDOE under Contract W-7405-Eng-82.

  7. Technique to match mantle and para-aortic fields

    SciTech Connect

    Lutz, W.R.; Larsen, R.D.

    1983-11-01

    A technique is described to match the mantle and para-aortic fields used in treatment of Hodgkin's disease, when the patient is treated alternately in supine and prone position. The approach is based on referencing the field edges to a point close to the vertebral column, where uncontrolled motion is minimal and where accurate matching is particularly important. Fiducial surface points are established in the simulation process to accomplish the objective. Dose distributions have been measured to study the combined effect of divergence differences, changes in body angulation and setup errors. Even with the most careful technique, the use of small cord blocks of 50% transmission is an advisable precaution for the posterior fields.

  8. ParaText : scalable text analysis and visualization.

    SciTech Connect

    Dunlavy, Daniel M.; Stanton, Eric T.; Shead, Timothy M.

    2010-07-01

    Automated analysis of unstructured text documents (e.g., web pages, newswire articles, research publications, business reports) is a key capability for solving important problems in areas including decision making, risk assessment, social network analysis, intelligence analysis, scholarly research and others. However, as data sizes continue to grow in these areas, scalable processing, modeling, and semantic analysis of text collections becomes essential. In this paper, we present the ParaText text analysis engine, a distributed memory software framework for processing, modeling, and analyzing collections of unstructured text documents. Results on several document collections using hundreds of processors are presented to illustrate the exibility, extensibility, and scalability of the the entire process of text modeling from raw data ingestion to application analysis.

  9. Nuevos sistemas de frecuencia intermedia para el IAR

    NASA Astrophysics Data System (ADS)

    Olalde, J. C.; Perilli, D.; Larrarte, J. J.

    Se presenta el diagrama en bloques de los nuevos sistemas de Frecuencia Intermedia para los dos radiómetros instalados en el IAR. Entre las características más importantes del sistema podemos mencionar la posibilidad de conectar cualquiera de las dos antenas a los ``backend" disponibles: analizador espectral de alta resolución (META II) de 0,05 Hz, autocorrelador de 1008 canales y contínuo. Se incorporan al sistema nuevos sintetizadores de frecuencia implementados con PLL y la moderna técnica de síntesis digital directa. Por último, el conjunto del sistema es susceptible de ser configurado por las computadoras de adquisición de datos, supervisadas por otra, que entrega el estado de funcionamiento actual y evita la selección de configuraciones incorrectas por parte del usuario.

  10. Procedimento para utilizar a assinatura do IB no Webmail 1) Acesse a sua conta no webmail;

    E-print Network

    Morandini, Andre C.

    1/5 Procedimento para utilizar a assinatura do IB no Webmail 1) Acesse a sua conta no webmail; 2 clique no ícone imagem; 8) Na tela seguinte, digite a seguinte URL da imagem: www.ib.usp.br/webmail/assinatura.jpg A imagem da assinatura do IB será exibida. Clique em OK para voltar para a tela de configuração e salve

  11. The existence of all three ParaHox genes in the clitellate annelid, Perionyx excavatus

    Microsoft Academic Search

    Bum Joon Park; Sung-Jin Cho; Eun Sik Tak; Bo Eun Lee; Soon Cheol Park

    2006-01-01

    A ParaHox gene cluster is composed of three genes (Gsx, Xlox, and Cdx). It has been proposed that all three ParaHox genes were present in the last common ancestor to the lophotrochozoan protostomes and the deuterostomes and that gene loss event has occurred in the ecdysozoan lineage. In this paper, we report the existence of all three ParaHox genes in

  12. Nueva opción de tratamiento para mujeres jóvenes con cáncer de seno sensible a las hormonas

    Cancer.gov

    Un fármaco usado para el tratamiento del cáncer de seno (mama), conocido como exemestano, es más eficaz que tamoxifeno, un fármaco preventivo de uso común para el cáncer de seno, en la prevención de la recidiva del cáncer de seno en mujeres jóvenes que también reciben tratamiento posoperativo para suprimir el funcionamiento ovárico. Los resultados de este estudio se presentaron en mujeres que tenían un tipo de cáncer de seno en estadio inicial sensible al tratamiento hormonal.

  13. Tcnicas de Investigacin y Manejo para la Conservacin de las Tortugas Marinas 199 Tcnicas de Investigacin y Manejo para la Conservacin de las Tortugas Marinas

    E-print Network

    Prestwich, Ken

    instalaciones y que se dispone de suficientes recursos financieros para el mantenimiento. Además deberán considerarse las siguientes advertencias: 1. Los viveros son muy costosos tanto en recursos financieros como

  14. Features of the ancestral bilaterian inferred from Platynereis dumerilii ParaHox genes

    PubMed Central

    Hui, Jerome HL; Raible, Florian; Korchagina, Natalia; Dray, Nicolas; Samain, Sylvie; Magdelenat, Ghislaine; Jubin, Claire; Segurens, Béatrice; Balavoine, Guillaume; Arendt, Detlev; Ferrier, David EK

    2009-01-01

    Background The ParaHox gene cluster is the evolutionary sister to the Hox cluster. Whilst the role of the Hox cluster in patterning the anterior-posterior axis of bilaterian animals is well established, and the organisation of vertebrate Hox clusters is intimately linked to gene regulation, much less is known about the more recently discovered ParaHox cluster. ParaHox gene clustering, and its relationship to expression, has only been described in deuterostomes. Conventional protostome models (Drosophila melanogaster and Caenorhabditis elegans) are secondarily derived with respect to ParaHox genes, suffering gene loss and cluster break-up. Results We provide the first evidence for ParaHox gene clustering from a less-derived protostome animal, the annelid Platynereis dumerilii. Clustering of these genes is thus not a sole preserve of the deuterostome lineage within Bilateria. This protostome ParaHox cluster is not entirely intact however, with Pdu-Cdx being on the opposite end of the same chromosome arm from Pdu-Gsx and Pdu-Xlox. From the genomic sequence around the P. dumerilii ParaHox genes the neighbouring genes are identified, compared with other taxa, and the ancestral arrangement deduced. Conclusion We relate the organisation of the ParaHox genes to their expression, and from comparisons with other taxa hypothesise that a relatively complex pattern of ParaHox gene expression existed in the protostome-deuterostome ancestor, which was secondarily simplified along several invertebrate lineages. Detailed comparisons of the gene content around the ParaHox genes enables the reconstruction of the genome surrounding the ParaHox cluster of the protostome-deuterostome ancestor, which existed over 550 million years ago. PMID:19627570

  15. DYNA3D/ParaDyn Regression Test Suite Inventory

    SciTech Connect

    Lin, J I

    2011-01-25

    The following table constitutes an initial assessment of feature coverage across the regression test suite used for DYNA3D and ParaDyn. It documents the regression test suite at the time of production release 10.1 in September 2010. The columns of the table represent groupings of functionalities, e.g., material models. Each problem in the test suite is represented by a row in the table. All features exercised by the problem are denoted by a check mark in the corresponding column. The definition of ''feature'' has not been subdivided to its smallest unit of user input, e.g., algorithmic parameters specific to a particular type of contact surface. This represents a judgment to provide code developers and users a reasonable impression of feature coverage without expanding the width of the table by several multiples. All regression testing is run in parallel, typically with eight processors. Many are strictly regression tests acting as a check that the codes continue to produce adequately repeatable results as development unfolds, compilers change and platforms are replaced. A subset of the tests represents true verification problems that have been checked against analytical or other benchmark solutions. Users are welcomed to submit documented problems for inclusion in the test suite, especially if they are heavily exercising, and dependent upon, features that are currently underrepresented.

  16. Ab initio dynamics study of poly-para-phenylene vinylene

    NASA Astrophysics Data System (ADS)

    Zheng, Guang; Clark, S. J.; Tulip, P. R.; Brand, S.; Abram, R. A.

    2005-07-01

    We present an ab initio dynamics investigation within a density-functional perturbation theory framework of the properties of the conjugated polymer poly-para-phenylene vinylene (PPV) in both the isolated chain and crystalline states. The calculated results show that for an isolated chain, most of the vibrational modes correspond to experimentally observed modes in crystalline PPV. However, additional hitherto unidentified modes have been observed in experiment and our calculations on crystalline material have allowed us to assign these. We also present the results of calculations of the polarizability and permittivity tensors of the material, which are in reasonable agreement with the typical values for conjugated polymers. Dynamical Born effective charges [S. Baroni, S. de Gironcoli, A. Dal Corso, and P. Giannozzi, Rev. Mod. Phys. 73, 515 (2001)] are calculated and compared with atomic charges obtained from Mulliken population analysis [M. D. Segall, C. J. Pickard, R. Shah, and M. C. Payne, Mol. Phys. 89, 571 (1996)] and we conclude that effective charges are more appropriate for use in the study of the dynamics of the system. Notable differences are found in the infrared-absorption spectra obtained for the isolated chain and crystalline states, which can be attributed to the differences in the crystalline packing effects, which clearly play a key role in influencing the lattice dynamics of PPV.

  17. Para-hydrogen induced polarization in heterogeneous hydrogenationreactions

    SciTech Connect

    Koptyug, Igor V.; Kovtunov, Kirill; Burt, Scott R.; Anwar, M.Sabieh; Hilty, Christian; Han, Song-I; Pines, Alexander; Sagdeev, Renad Z.

    2007-01-31

    We demonstrate the creation and observation ofpara-hydrogen-induced polarization in heterogeneous hydrogenationreactions. Wilkinson's catalyst, RhCl(PPh3)3, supported on eithermodified silica gel or a polymer, is shown to hydrogenate styrene intoethylbenzene and to produce enhanced spin polarizations, observed throughNMR, when the reaction was performed with H2 gas enriched in the paraspinisomer. Furthermore, gaseous phase para-hydrogenation of propylene topropane with two catalysts, the Wilkinson's catalyst supported onmodified silica gel and Rh(cod)(sulfos) (cod = cycloocta-1,5-diene;sulfos) - O3S(C6H4)CH2C(CH2PPh2)3) supported on silica gel, demonstratesheterogeneous catalytic conversion resulting in large spin polarizations.These experiments serve as a direct verification of the mechanism ofheterogeneous hydrogenation reactions involving immobilized metalcomplexes and can be potentially developed into a practical tool forproducing catalyst-free fluids with highly polarized nuclear spins for abroad range of hyperpolarized NMR and MRI applications.

  18. Quadrupole Approximation for Para-Positronium in Relativistic Schrödinger Theory

    E-print Network

    M. Mattes; M. Sorg

    2011-09-11

    The non-relativistic energy levels of para-positronium are calculated in the quadrupole approximation of the interaction potential. This approximation technique takes into account the anisotropy of the electrostatic electron-positron interaction in the lowest order. The states due to different values of the quantum number $(l_z)$ of angular momentum are found to be no longer degenerate as is the case in the conventional theory. The physical origin of this elimination of the conventional degeneracy may intuitively be attributed to the state-dependent inertial \\emph{broadening} of the rotating charge clouds; the corresponding \\emph{anisotropic} deformation (in the quadrupole approximation) lowers then the negative electrostatic interaction energy. The result of this influence of anisotropy is that the states with $l_z=0$ adopt smaller binding energy whereas the states with maximal value of $|l_z|$ (for fixed principal quantum number $n$) have the largest binding energy within the angular momentum multiplet $(-|l_{z,\\mathrm{max}}| \\le l_z \\le |l_{z,\\mathrm{max}}|)$. This yields a certain kind of electric fine-structure splitting with the splitted RST levels being placed in a relatively narrow band around the (highly degenerated) conventional levels.

  19. Vibrational relaxation in jet-cooled para-alkylanilines

    NASA Astrophysics Data System (ADS)

    Powers, D. E.; Hopkins, J. B.; Smalley, R. E.

    1980-05-01

    Absorption and fluorescence spectra have been obtained for the 1B2(??*)?1A1 transition of a series of para-alkylanilines cooled in a supersonic free jet. The series consists of all p-n-alkylanilines through n-butyl- as well as p-isopropylaniline and aniline itself. For those members of the series having an alkyl chain length of three or greater, two distinct molecular conformations are found to be populated in the jet with roughly equal likelihood. Spectra of both the extended chain conformation [p-n-(t)-alkylanilines] and the coiled chain conformation [p-n-(g)-alkylanilines] show that two optically active aniline vibrations are largely unaffected by changes in the length and nature of the n-alkyl chain. One of these vibrations (the inversion motion of the -NH2 group) would be expected to be particularly weakly coupled to the torsions and bends of p-alkyl chain. Nonetheless, fluorescence spectra obtained when this vibration is excited in the 1B2 state show that intramolecular vibrational relaxation occurs into the chain modes within a nanosecond.

  20. Para-dichlorobenzene toxicity – a review of potential neurotoxic manifestations

    PubMed Central

    Dubey, Divyanshu; Sharma, Vibhash D.; Pass, Steven E.; Sawhney, Anshudha

    2014-01-01

    Background: Para-dichlorobenzene (PDCB) is an active ingredient of mothballs, deodorizers and fumigants. Due to the easy availability of this chemical, there is a considerable risk for accidental or intentional toxic exposure. Recently, multiple cases of PDCB toxicity due to mothball ingestion were reported. PDCB toxicity can affect multiple organ systems including liver, kidneys, skin, lung and the central nervous system (CNS). CNS toxicity often results in leukoencephalopathy and heterogeneous neurological manifestations. Objectives: The objective of this study was to illustrate the clinical presentation, imaging findings, diagnosis and management of PDCB toxicity. Methods: We carried out a literature review of the pharmacological and toxicological properties of PDCB. Conclusions: PDCB and other aromatic hydrocarbons are capable of CNS tissue damage and in promoting functional neurological decline. While very little is currently known about prevalence of PDCB addiction, it cannot be ruled out that its illicit use among young people is under-recognized. The number of cases of PDCB toxicity might also rise due to the increasing industrial and domestic use of this chemical. PMID:24790648

  1. Analise de Mecanismos de CAC para Redes ATM Michel Ferreira Abdalla

    E-print Network

    Abdalla, Michel Ferreira

    An´alise de Mecanismos de CAC para Redes ATM Michel Ferreira Abdalla Department of Computer Science~ao em redes ATM. Uma classifica¸c~ao destes mecanismos baseada no princ´ipio impl´icito neles utilizado encontrar em redes ATM, estes mecanismos apre- sentam resultados bastante superestimados para a capaci- dade

  2. MiCCS4Mobile Middleware para Comunicao e Coordenao Segura em Redes Ad-hoc

    E-print Network

    Neves, Nuno

    MiCCS4Mobile Middleware para Comunicação e Coordenação Segura em Redes Ad-hoc com Participantes desenvolvimento de aplicações móveis. Algumas aplicações exploram protocolos de redes sem fios e a mobilidade dos dispositivos para aumentar as suas funciona- lidades. A classe de protocolos de redes sem fios com dispositivos

  3. Uma Implementac~ao Concorrente de Redes Neurais PCA para Compress~ao de Imagens

    E-print Network

    Pereira, Marcone Corrêa

    Uma Implementac¸~ao Concorrente de Redes Neurais PCA para Compress~ao de Imagens Willian Y. Honda1 dados. Considerando uma rede neural que aproxima os resultados da PCA cl´assica, a principal contribuic¸~ao deste trabalho consiste em apresentar um modelo de implementac¸~ao concorrente para essa rede. Um estudo

  4. Opciones de cirugía para mujeres con CDIS o con cáncer de seno

    Cancer.gov

    Contiene información sobre los tipos de cirugía de seno, como la operación para conservar el seno y la mastectomía, y ayuda a las mujeres diagnosticadas con CDIS o con cáncer de seno a decidir cuál cirugía es la más conveniente para ellas.

  5. MEDIDA DE LA CSF CROMTICA Y ACROMTICA CON MONITORES ORDINARIOS PARA PRCTICAS DE LABORATORIO

    E-print Network

    Escolano, Francisco

    comerciales, de prestaciones inferiores, que presentan problemas para generar estímulos para experimentos distinguir la red de un campo uniforme. La CSF se obtiene como la inversa del contraste global en el espacio imposibilita su uso durante un experimento, por lo que trabajamos con estímulos pre-calculados. MEDIDA El

  6. TRIBUNAL REGIONAL FEDERAL DA 1 REGIO XIV CONCURSO PBLICO PARA PROVIMENTO DE CARGO DE

    E-print Network

    Maier, Rudolf Richard

    TRIBUNAL REGIONAL FEDERAL DA 1ª REGIÃO XIV CONCURSO PÚBLICO PARA PROVIMENTO DE CARGO DE JUIZ FEDERAL SUBSTITUTO ­ 1ª REGIÃO Edital de Retificação O Desembargador Federal Presidente da Comissão de Concurso do XIV Concurso Público para provimento de cargo de Juiz Federal Substituto do Tribunal Regional

  7. CAPACITACIÓN A LIDERES DE LAS COMUNIDADES RURALES PARA LLEGAR CON EL MENSAJE

    Microsoft Academic Search

    Jorge Alfredo González Pérez

    2010-01-01

    Para lograr introducir en nuestras comunidades rurales cualquiera información técnica o participativa debemos de pensar en forma de desarrollo futuro buscando alternativas que propicien una buena capacitación en este caso para la introducción de nuevas técnicas, cultivos, utilización de los recursos racionales e introducción de otros de mejor resultados y hasta hacer de los diferentes productores de comunidades una escuela

  8. Evaluación de dos esquemas de inmunización para la Evaluación de dos esquemas de inmunización para la Evaluación de dos esquemas de inmunización para la Evaluación de dos esquemas de inmunización para la producción de sueros producción de sueros producción de sueros producción de sueros hiperinmunes contra hiperinmunes contra hiperinmunes contra hiperinmunes contra Leptospira Leptospira Leptospira Leptospira interrogans interrogans interrogans interrogans

    Microsoft Academic Search

    Andrés González; Niurka Batista; Manuel Ortíz; Vismark Torres; Juan F. Infante; Marta González

    2002-01-01

    Los antisueros policlonales utilizados para el serotipaje de cepas de Leptospira deben caracterizarse por un alto nivel de aglutininas específicas a un serogrupo o serovar determinado y una baja reactividad cruzada frente al resto de las serovariedades. El presente trabajo se desarrolló con el objetivo de evaluar y comparar dos de los esquemas de inmunización reportados para la obtención de

  9. Planificación y Lenguaje para la Iniciación a la Programación Orientada a Objetos

    Microsoft Academic Search

    Luis Fernández Muñoz; Rosalía Peña Ros; J. Ángel Velázquez-Iturbide

    Resumen— La programación orientada a objetos suele enseñarse después de la procedimental en los planes de estudio actuales. La parte práctica de una asignatura de programación suele consistir en la realización de programas. Elegir un lenguaje para cada paradigma, uno orientado a objetos para ambos o un lenguaje híbrido, presenta diferentes problemas de aprendizaje. Además, muchos lenguajes comerciales orientados a

  10. Extensi'on del c'alculo para la Modelizaci'on de Procesos Concurrentes

    E-print Network

    Alpuente, María

    casos como para pensar en 'el como recurso expresi­ vo adecuado para la programaci'on, vamos a definir un lenguaje de m'as alto nivel, ALEPH, que posee los recursos expresivos deseables en programaci'on y

  11. Notas de Aula: Fisica para Biologia: PRELIMINAR Nestor Caticha e Osame Kinouchi

    E-print Network

    Caticha, Nestor

    Notas de Aula: F´isica para Biologia: PRELIMINAR Nestor Caticha e Osame Kinouchi 27 de junho de´ificas nem discutir a biologia por tr´as destas aplica¸c~oes. Esperamos que isso seja estudado em outras problema maior para estudantes de biologia pode ser o tratamento matem´atico. Usaremos novamente o

  12. Arquitectura Multiagente para la Gestin de Informacin de Awareness en Entornos CSCL

    E-print Network

    Guerrero, Luis

    Arquitectura Multiagente para la Gestión de Información de Awareness en Entornos CSCL Iván D razón, este artículo presenta una Arquitectura Multiagentes como alternativa para la gestión de usuario mediante una Arquitectura Multiagente que permite gestionar la información de Conciencia Grupal o

  13. Uso del conocimiento de la arquitectura Fermi para mejorar el rendimiento en aplicaciones

    E-print Network

    Llanos, Diego R.

    Uso del conocimiento de la arquitectura Fermi para mejorar el rendimiento en aplicaciones CUDA Yuri arquitectura Fermi de NVIDIA introduce nuevos criterios a la hora de selec- cionar los tama~nos y la geometr arquitectura para aplicar adecua- damente t´ecnicas de optimizaci´on de c´odigo. Fermi [2] [3] [4] es la

  14. Desarrollo y Aplicacin de un ndice de Calidad de Agua para ros en Puerto Rico

    E-print Network

    Gilbes, Fernando

    Desarrollo y Aplicación de un Índice de Calidad de Agua para ríos en Puerto Rico por Francisco J en INGENIERÍA CIVIL UNIVERSIDAD DE PUERTO RICO RECINTO UNIVERSITARIO DE MAYAGÜEZ 2009 Aprobado por trabajo presenta la elaboración de un Índice de Calidad de Agua (ICA) para los ríos en Puerto Rico. Dicho

  15. SELEÇÃO PRECOCE DE CLONES DE BATATA PARA CARACTERES DO TUBÉRCULO1

    Microsoft Academic Search

    GEOVANI BERNARDO AMARO; CÉSAR AUGUSTO; BRASIL PEREIRA; EDUARDO DE SOUZA LAMBERT; LEITE MARTINS

    RESUMO - Nos últimos anos, foi despertado um grande interesse para o pr ocessamento da batata na forma de fritura no Brasil. Visando à obtenção de culti- vares nacionais que atendam aos padrões de qualidade culinária exigidos pelas indústrias de processamento, os programas de melhoramento de batata têm estabelecido estratégias para a redução de custos e de tempo. Reali- zou-se

  16. Un test adaptativo informatizado para evaluar el conocimiento de inglés escrito: diseño y comprobaciones psicométricas

    Microsoft Academic Search

    Julio Olea; Francisco José Abad; Vicente Ponsoda; M. Carmen Ximénez

    2004-01-01

    El presente artículo muestra el trabajo desarrollado para diseñar un test adaptativo informatizado que evalúa el nivel de conocimientos de inglés escrito en castellano-parlantes. Se describe el proceso se- guido para la elaboración del banco de ítems, la comprobación de sus propiedades psicométricas, el ajuste obtenido al modelo logístico de tres parámetros y las principales características del algoritmo adaptativo. Se

  17. Interpoladores Espaciais para Gerao de Superfcies de Densidade Populacional na Amaznia Brasileira: problemas e perspectivas.

    E-print Network

    Camara, Gilberto

    Interpoladores Espaciais para Geração de Superfícies de Densidade Populacional na Amazônia de superfícies de densidade populacional na Amazônia Brasileira. Os principais problemas de mais utilizados para gerar superfícies de densidade populacional. Discute-se a aplicabilidade destes

  18. Bases morfofisiológicas para maior tolerância dos híbridos modernos de milho a altas densidades de plantas

    Microsoft Academic Search

    Luís Sangoi; Milton Luiz de Almeida; Paulo Regis Ferreira da Silva; Gilber Argenta

    2002-01-01

    RESUMO O lançamento de híbridos de milho tolerantes ao aumento da densidade de plantas contribuiu para o incremento do potencial produtivo da cultura na segunda metade do século XX. Objetiva-se com esta revisão de literatura discutir características morfológicas, fisiológicas, fenológicas e alométricas que contribuíram para maior adaptação do milho a elevadas densidades de plantas. Os processos de seleção utilizados pelos

  19. Escalamiento en la Densidad de Im agenes para una Reconstrucci on Tridimensional

    E-print Network

    Fraga, Luis Gerardo de la

    Escalamiento en la Densidad de Im#19;agenes para una Reconstrucci#19;on Tridimensional Luis Gerardo microscopio electr#19;onico de transmisi#19;on. El escalamiento en la densidad es un paso previo para usar semejante, a una densidad cero y una varianza arbitraria de valor 100. Roseman et al [6] simplemente

  20. Metodología para el Análisis y Diseño de Sistemas Multi Agente Robóticos: MAD-Smart

    Microsoft Academic Search

    Marcela Vallejo Valencia; John Fredy; Ochoa Gómez; Términos Generales

    RESUMEN En este artículo se describe la metodología para el desarrollo de Sistemas Multi-Agente Robóticos MAD-Smart y se desarrollan algunos ejemplos para visualizar algunas de sus car acterísticas. La metodología buscar dar cobertura en la fase de con ceptuación, análisis y diseño mediante la definición de un conj unto de actividades que ayudan al desarrollador a entender mejor el problema

  1. The effects of para-chlorophenylalanine on brain serotonin, food intake, and U-Maze behavior

    Microsoft Academic Search

    Robert A. McFarlain; J. M. Bloom

    1972-01-01

    The effects of the serotonin depleting drug dl para-chlorophenylalanine on conditioned alternation in the U-Maze were examined. Rats given para-chlorophenylalanine and nondrugged rats received reward contingent upon alternating choices between the left and right maze arms.

  2. Livro de actividades em ToonTalk para o pré-escolar

    Microsoft Academic Search

    Leonel Morgado; Maria Gabriel Bulas Cruz; Ana Teresa Tavares; Christophe Moura

    Como orientação para os educadores, foi desenvolvido um conjunto de actividades adequadas a contextos de educação pré-escolar (crianças dos 3 aos 5 anos, na presença de educadores), que se apoiam no videojogo - ou videobrinquedo - ToonTalk. Para permitir uma fácil compreensão e acompanhamento por parte de crianças e educadores, foi então desenvolvida uma forma gráfica de transmitir essas actividades,

  3. Plastic debris ingestion by sea turtle in Para??ba, Brazil

    Microsoft Academic Search

    Rita Mascarenhas; Robson Santos; Douglas Zeppelini

    2004-01-01

    Coastal gill net entanglement and debris intake are important threats to the survival of sea turtles. Two sea turtles (Lepidochelys olivacea and Chelonia mydas) were found stranded along the coast of Para??ba. After necropsy, plastic debris were found in the stomach. The debris is described. This is the first record of this sort of problem for the Para??ba littoral.

  4. Accesibilidad para personas con debilidad visual Mac OS X Snow Leopard

    E-print Network

    Fernández de Córdoba, Pedro

    Accesibilidad para personas con debilidad visual Mac OS X Snow Leopard ASIC ­ 18 de noviembre de LEOPARD Al igual que otros sistemas operativos, MAC OS X Snow Leopard ofrece algunas ayudas para que las debilidad visual Mac OS X Snow Leopard ASIC ­ 18 de noviembre de 2010 Pág. 2 de 25 1. Recomendaciones

  5. PROPUESTAS PARA EL PERFECCIONAMIENTO DEL CÁLCULO DE LOS COSTOS EN LA EMPRESA FORESTAL INTEGRAL GUANTÁNAMO

    Microsoft Academic Search

    Rebeca Judith Gabriel Pellicier; María del Pilar Garzón Wilson

    2011-01-01

    El trabajo se desarrollo en la Empresa Forestal Integral Guantánamo. Para la realización de la propuesta se analizó el sistema de costo que se utiliza y su aplicación en las 3 Unidades Básicas de Producción Industrial con que cuentan. Estas unidades para realizar su actividad productiva tienen como punto de partida la demanda que existe por parte de los organismos

  6. Corynebacterium diphtheriae diphtheriae diphtheriae diphtheriae, empleados en la , empleados en la , empleados en la , empleados en la producción de vacunas para uso humano producción de vacunas para uso humano producción de vacunas para uso humano producción de vacunas para uso humano

    Microsoft Academic Search

    Elsie Iglesias; Yilian Plasencia; Teresita Morales; Luis Izquierdo

    2000-01-01

    En el presente estudio se evaluó el método de congelación a -70ºC para la preservación de Bordetella pertussis y Corynebacterium diphtheriae. Para verificar el sustento de los cultivos se realizó un adecuado control de calidad, que incluyó comprobación de pureza, viabilidad y estabilidad de las propiedades de interés. En este trabajo se probaron diferentes formulaciones. Se seleccionó la que arrojó

  7. AMIR-ST: Propuesta de una Aproximación Metodológica para la Ingeniería de Requisitos de Sistemas Telemáticos

    Microsoft Academic Search

    Mario Fernando; Solarte Sarasty

    Resumen En el presente artículo se propone a AMIR-ST (Aproximación Metodológica para la Ingeniería de Requisitos de Sistemas Telemáticos), como un conjunto articulado y bien balanceado de métodos para el flujo de trabajo de Ingeniería de Requisitos, que constituye un proceso de desarrollo fundamentado en la interacción continua con los usuarios, la obtención del Modelo de Negocio, el desarrollo de

  8. Seguimiento de Objetos para la reconstrucción de Ambientes en 3D

    Microsoft Academic Search

    Alvarez Tirado

    Este documento presenta el estado del arte en el seguimiento de objetos por medio de visión artificial para generar ambientes reconstruidos en tres dimensiones. El proceso en general, es la consecución o el flujo cíclico de los procesos para llegar a los módulos de seguimiento y reconstrucción. Partiendo desde los dispositivos de visión que son quienes proporcionan al sistema la

  9. Montaje de INTEGRAL -1 -Manual de Montaje para los Astrnomos de Soporte

    E-print Network

    montado. No obstante, hay que tener en cuenta que esta sala se utiliza también para otros instrumentos, y explica el montaje del instrumento. Este documento complementa el "Instrument Change Checklist" del WHT utili- zación para las observaciones de esa noche con otros instrumentos. Los distintos pasos a ejecutar

  10. MAEB 2012 Albacete, 8-10 de Febrero de 2012 Tecnicas de pruebas automaticas para

    E-print Network

    Granada, Universidad de

    . Para demostar el uso estas estrategias, se aplican a un algoritmo gen´etico estacionario, comprobando c algoritmo gen´etico con codificaci´on real [11], aun- que el enfoque planteado puede extenderse a otros AEsMAEB 2012 Albacete, 8-10 de Febrero de 2012 T´ecnicas de pruebas autom´aticas para algoritmos

  11. Modelo de desarrollo de aplicaciones móviles basadas en videojuegos para la navegación de personas ciegas

    Microsoft Academic Search

    Jaime Sánchez; Luis Guerrero; Mauricio Sáenz; Héctor Flores

    Existe una necesidad real de contar con sistemas para que personas con discapacidad visual mejoren las habilidades de movilidad y orientación, es especial para que los niños puedan mejorar su autonomía en el futuro. Sin embargo, estos sistemas deben ser diseñados acorde a los objetivos, metodologías y recursos disponibles, así como también considerando los intereses y formas de interacción de

  12. EVALUACIÓN DEL POTENCIAL AGROECOLÓGICO DE CAÑA DE AZÚCAR EN ARGENTINA PARA LA PRODUCCIÓN DE BIOCOMBUSTIBLES

    Microsoft Academic Search

    Renée Alicia Anschau; Noelia Flores Marco; Stella Maris Carballo; Jorge Hilbert

    2010-01-01

    En el presente trabajo se muestran los resultados obtenidos a partir de la evaluación del cultivo de Caña de Azúcar; La puesta en vigencia de las leyes argentinas, que fija incentivos específicos para este cultivo, reabren las posibilidades de retomar la producción de bioetanol anhidro para uso como combustible. El objetivo final del presente estudio es entonces, contribuir al uso

  13. Para-nitrobenzyl esterases with enhanced activity in aqueous and nonaqueous media

    DOEpatents

    Arnold, Frances H. (Pasadena, CA); Moore, Jeffrey C. (Pasadena, CA)

    1998-01-01

    A method for isolating and identifying modified para-nitrobenzyl esterases which exhibit improved stability and/or esterase hydrolysis activity toward selected substrates and under selected reaction conditions relative to the unmodified para-nitrobenzyl esterase. The method involves preparing a library of modified para-nitrobenzyl esterase nucleic acid segments (genes) which have nucleotide sequences that differ from the nucleic acid segment which encodes for unmodified para-nitrobenzyl esterase. The library of modified para-nitrobenzyl nucleic acid segments is expressed to provide a plurality of modified enzymes. The clones expressing modified enzymes are then screened to identify which enzymes have improved esterase activity by measuring the ability of the enzymes to hydrolyze the selected substrate under the selected reaction conditions. Specific modified para-nitrobenzyl esterases are disclosed which have improved stability and/or ester hydrolysis activity in aqueous or aqueous-organic media relative to the stability and/or ester hydrolysis activity of unmodified naturally occurring para-nitrobenzyl esterase.

  14. Para-nitrobenzyl esterases with enhanced activity in aqueous and nonaqueous media

    DOEpatents

    Arnold, Frances H. (Pasadena, CA); Moore, Jeffrey C. (Pasadena, CA)

    1999-01-01

    A method for isolating and identifying modified para-nitrobenzyl esterases which exhibit improved stability and/or esterase hydrolysis activity toward selected substrates and under selected reaction conditions relative to the unmodified para-nitrobenzyl esterase. The method involves preparing a library of modified para-nitrobenzyl esterase nucleic acid segments (genes) which have nucleotide sequences that differ from the nucleic acid segment which encodes for unmodified para-nitrobenzyl esterase. The library of modified para-nitrobenzyl nucleic acid segments is expressed to provide a plurality of modified enzymes. The clones expressing modified enzymes are then screened to identify which enzymes have improved esterase activity by measuring the ability of the enzymes to hydrolyze the selected substrate under the selected reaction conditions. Specific modified para-nitrobenzyl esterases are disclosed which have improved stability and/or ester hydrolysis activity in aqueous or aqueous-organic media relative to the stability and/or ester hydrolysis activity of unmodified naturally occurring para-nitrobenzyl esterase.

  15. Para-nitrobenzyl esterases with enhanced activity in aqueous and nonaqueous media

    DOEpatents

    Arnold, F.H.; Moore, J.C.

    1998-04-21

    A method is disclosed for isolating and identifying modified para-nitrobenzyl esterases. These enzymes exhibit improved stability and/or esterase hydrolysis activity toward selected substrates and under selected reaction conditions relative to the unmodified para-nitrobenzyl esterase. The method involves preparing a library of modified para-nitrobenzyl esterase nucleic acid segments (genes) which have nucleotide sequences that differ from the nucleic acid segment which encodes for unmodified para-nitrobenzyl esterase. The library of modified para-nitrobenzyl nucleic acid segments is expressed to provide a plurality of modified enzymes. The clones expressing modified enzymes are then screened to identify which enzymes have improved esterase activity by measuring the ability of the enzymes to hydrolyze the selected substrate under the selected reaction conditions. Specific modified para-nitrobenzyl esterases are disclosed which have improved stability and/or ester hydrolysis activity in aqueous or aqueous-organic media relative to the stability and/or ester hydrolysis activity of unmodified naturally occurring para-nitrobenzyl esterase. 43 figs.

  16. Para-nitrobenzyl esterases with enhanced activity in aqueous and nonaqueous media

    DOEpatents

    Arnold, F.H.; Moore, J.C.

    1999-05-25

    A method is disclosed for isolating and identifying modified para-nitrobenzyl esterases which exhibit improved stability and/or esterase hydrolysis activity toward selected substrates and under selected reaction conditions relative to the unmodified para-nitrobenzyl esterase. The method involves preparing a library of modified para-nitrobenzyl esterase nucleic acid segments (genes) which have nucleotide sequences that differ from the nucleic acid segment which encodes for unmodified para-nitrobenzyl esterase. The library of modified para-nitrobenzyl nucleic acid segments is expressed to provide a plurality of modified enzymes. The clones expressing modified enzymes are then screened to identify which enzymes have improved esterase activity by measuring the ability of the enzymes to hydrolyze the selected substrate under the selected reaction conditions. Specific modified para-nitrobenzyl esterases are disclosed which have improved stability and/or ester hydrolysis activity in aqueous or aqueous-organic media relative to the stability and/or ester hydrolysis activity of unmodified naturally occurring para-nitrobenzyl esterase. 43 figs.

  17. Um enfoque antropológico para o ensino de astronomia no nível médio

    NASA Astrophysics Data System (ADS)

    Costa, G. B.; Jafelice, L. C.

    2003-08-01

    Há uma enorme carência de materiais didático-pedagógicos em astronomia para professores do ensino médio, sobretudo materiais que explorem também aspectos humanísticos. A origem do Universo é um bom exemplo desta constatação central. Embora tal origem teve explicações culturais diversas, os professores não têm informações sobre isso e muito menos material que trabalhe diferentes visões de mundo e treinamento que os capacite a abordá-las devidamente. Conseqüentemente o ensino de astronomia costuma ser tecnicista e dissociado do aspecto humano que alimenta o grande interesse e curiosidade que esses temas despertam. Aqui apresentamos propostas visando contribuir para reverter esse quadro e trabalhamos distintas visões de Universo: espontâneas, autóctones e científicas. Desenvolvemos práticas, materiais instrucionais e textos para viabilizar a adoção de um enfoque antropológico para o ensino de astronomia no nível médio, no qual as culturas humanística e científica sejam integradas de uma maneira contextualizada e eficaz para aquele ensino. Estas propostas foram aplicadas em um curso de treinamento para professores da rede pública de diferentes disciplinas. A receptividade dos professores à abordagem proposta e os resultados alcançados foram muito estimulantes. Destes, destacamos: produção de roteiros de atividades; desenvolvimento de práticas didático-pedagógicas específicas (e.g., encenação de mitos; dança primordial guarani; "criação" de constelações e interpretações pluriculturais; etc.); e sugestões concretas para a efetiva realização de um ensino interdisciplinar contextualizado, onde questões cosmogônicas servem de mote para iniciar tal ensino. Discutimos estes resultados e como o enfoque adotado pode instrumentalizar os professores para leituras de mundo que incluem naturalmente aspectos culturais, sociais e históricos associados aos temas estudados. (PPGECNM/UFRN; PRONEX/FINEP; NUPA/USP; Temáticos/FAPESP)

  18. Construção de um catálogo de aglomerados abertos para estudo da dinâmica da estrutura espiral da Galáxia

    NASA Astrophysics Data System (ADS)

    Carlos, I. M.; Lépine, J. R. D.

    2003-08-01

    Os aglomerados abertos são objetos de grande valor para o estudo da dinâmica da Galáxia devido esses objetos terem uma faixa de idade relativamente ampla. O trabalho visa estudar a dinâmica da estrutura espiral da Galáxia principalmente através do uso desses aglomerados, uma vez que o estudo da cinemática desses objetos é fundamental para esse objetivo. Nosso grupo trabalha no sentido de construir uma base de dados de aglomerados abertos contendo coordenadas, distância, idade, movimentos próprios e velocidades radiais e já disponibiliza uma nova versão do catálogo de aglomerados abertos o qual é uma compilação de edições anteriores, principalmente Lynga (1987), Mermilliod (1995) e ESO-B (Lauberts 1982). Nossa amostra possui cerca de 1630 aglomerados, mas nem todos os parâmetros acima citados foram determinados em sua totalidade. Para determinarmos esses parâmetros, derivamos as cores intrínsecas das estrelas membro de cada aglomerado a partir de seus tipos espectrais (busca feita no SIMBAD) obtendo assim o excesso de cor individual. A distribuição dos excessos de cor foi então utilizada para derivarmos o avermelhamento médio para cada aglomerado. De maneira similar, os tipos espectrais foram usados para estimar as magnitudes absolutas, e com as magnitudes absolutas e aparentes determinamos a respectiva distribuição do módulo de distância e finalmente a distância. Para determinar as idades foram confeccionados os diagramas cor-magnitude das estrelas de cada aglomerado onde foram superpostas a Seqüência Principal de Idade Zero (ZAMS). Superpomos a ZAMS de Schmidt-Kaler e isócronas de composição solar. Essas isócronas foram usadas para determinação das idades dos aglomerados. Uma vez que não temos ainda resultados finais, apresentamos então alguns diagramas cor-magnitude os quais foram usados para determinação, principalmente, da distância e idade dos aglomerados.

  19. COD, para-chlorophenol and toxicity removal from para-chlorophenol containing synthetic wastewater in an activated sludge unit.

    PubMed

    Kargi, Fikret; Konya, Isil

    2006-05-20

    Chlorinated phenolic compounds present in some chemical industry wastewaters cause severe toxic effects on the organisms and often are resistant to biological degradation. Synthetic wastewater containing different concentrations of para-chlorophenol (4-chlorophenol, 4-CP) was biologically treated in an activated sludge unit for COD, 4-CP and toxicity removal. Effects of feed 4-CP concentration on COD, 4-CP, toxicity removals and on sludge volume index were investigated at a constant sludge age of 20 days and hydraulic residence time (HRT) of 25 h. Resazurin method based on dehydrogenase activity was used for determination of the toxicity of the feed and effluent wastewater. COD and 4-CP removals were not affected by the presence of 4-CP in the wastewater up to feed 4-CP concentration of 925 mg l(-1) because of almost complete degradation of 4-CP yielding lower than 50 mg l(-1) 4-CP in the aeration tank. Percent COD, 4-CP and toxicity removals decreased and the effluent COD, 4-CP and toxicity levels increased with further increases in the feed 4-CP concentrations above 925 mg l(-1) because of inhibitory concentrations of 4-CP in the reactor. Biomass concentration in the aeration tank decreased and the sludge volume index (SVI) increased with feed 4-CP concentrations above 925 mg l(-1) resulting in lower COD and 4-CP removal rates. The rates of COD and 4-CP removals indicated substrate (4-CP) inhibition for the feed 4-CP concentrations above 925 mg l(-1) corresponding to the reactor 4-CP of above 200 mg l(-1). The system should be operated at the feed 4-CP concentrations of less than 900 mg l(-1) (4-CP(R) < 200 mg l(-1)) in order to obtain high rates and extents of COD, 4-CP and toxicity removals at a sludge age of 20 days and HRT of 25 h. PMID:16257114

  20. 75 FR 34943 - Defense Federal Acquisition Regulation Supplement; Para-Aramid Fibers and Yarns Manufactured in a...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-21

    ...Domestic Para-Aramid Sewing Thread May Be of Lower Quality...specification to use para-aramid thread that was heavier and weaker than the commercial thread that was used in the commercial...Regulatory Flexibility Analysis One respondent...

  1. Colonization of wheat para-nodules by N2-fixing cyanobacterium Nostoc 2S9

    SciTech Connect

    Gantar, Miroslav; Elhai, Jeff

    1999-03-01

    The treatment of wheat roots with 2,4-Dichlorophenoxyacetic acid led to the formation of tumor-like structures, para-nodules, which were readily colonized by cyanobacteria. The amount of cyanobacteria found on 2,4-D treated roots was 3.6 times higher than that found on untreated roots. Cyanobacteria penetrated the para-nodules by migrating in between loosely arranged cells that covered their surfaces or by penetrating the space at the junction of root and para-nodule. In plants treated with 2,4-D and co-cultivated with cyanobacteria, the rate of acetylene reduction was three times higher than in control plants.

  2. Endovascular Treatment of a Ruptured Para-Anastomotic Aneurysm of the Abdominal Aorta

    SciTech Connect

    Sfyroeras, Giorgos S.; Lioupis, Christos, E-mail: lioupisC@vodafone.net.gr; Bessias, Nikolaos; Maras, Dimitris [Red Cross Hospital of Athens, Department of Vascular Surgery (Greece); Pomoni, Maria [Red Cross Hospital of Athens, Department of Radiology (Greece); Andrikopoulos, Vassilios [Red Cross Hospital of Athens, Department of Vascular Surgery (Greece)

    2008-07-15

    We report a case of a ruptured para-anastomotic aortic aneurysm treated with implantation of a bifurcated stent-graft. A 72-year-old patient, who had undergone aortobifemoral bypass for aortoiliac occlusive disease 16 years ago, presented with a ruptured para-anastomotic aortic aneurysm. A bifurcated stent-graft was successfully deployed into the old bifurcated graft. This is the first report of a bifurcated stent-graft being placed through an 'end-to-side' anastomosed old aortobifemoral graft. Endovascular treatment of ruptured para-anastomotic aortic aneurysms can be accomplished successfully, avoiding open surgery which is associated with increased mortality and morbidity.

  3. Modelos Teoricos de Linhas de Recombinacao EM Radio Frequencias Para Regioes H II

    NASA Astrophysics Data System (ADS)

    Abraham, Z.; Cancoro, A. C. O.

    1987-05-01

    Foram feitos modelos de linhas de recombinção provenientes de regiões HII nas frequências de rádio para distintos números quãnticos. Estes modelos consideram regrões H II esfericamente simétricas com variações radiais na densidade e temperatura eletrônica, efeitos de colisoes inelásticas dos eletrons (alargarnento por pressão), e afastarnento do equiliíbrio termodinâmico local. 0 bojetivo é construir o perfil da linha para cada ponto da nuvern e obter o valor médio resultante da sua convoluçã com o feixe da antena de tarnanho comparável corn o tarnanho angular da nuvern para posterIor cornpara o corn

  4. All the three ParaHox genes are present in Nuttallochiton mirandus (Mollusca: polyplacophora): evolutionary considerations.

    PubMed

    Barucca, Marco; Biscotti, Maria A; Olmo, Ettore; Canapa, Adriana

    2006-03-15

    The ParaHox gene cluster contains three homeobox genes, Gsx, Xlox and Cdx and has been demonstrated to be an evolutionary sister of the Hox gene cluster. Among deuterostomes the three genes are found in the majority of taxa, whereas among protostomes they have so far been isolated only in the phylum Sipuncula. We report the partial sequences of all three ParaHox genes in the polyplacophoran Nuttallochiton mirandus, the first species of the phylum Mollusca where all ParaHox genes have been isolated. This finding has phylogenetic implications for the phylum Mollusca and for its relationships with the other lophotrochozoan taxa. PMID:16331637

  5. Measurement of the formaldehyde ortho to para ratio in three molecular clouds

    NASA Technical Reports Server (NTRS)

    Kahane, C.; Lucas, R.; Frerking, M. A.; Langer, W. D.; Encrenaz, P.

    1984-01-01

    Observations of ortho and para H2CO in two types of clouds, a warm cloud (Orion A) and two cold clouds (L183 and TMC1), are presented. The ortho to para ratio in Orion deduced from the H2(C-13)O data is about three, while that for TMC1 is about one and that for L183 is 1-2. The former value is in agreement with the value calculated from chemical models of ortho and para H2CO production. The values for the cold clouds are consistent with thermal equilibrium at a temperature slightly smaller than 10 K.

  6. Descripción de la zona de alta difusión en un modelo bidimensional para hojas de corriente

    NASA Astrophysics Data System (ADS)

    Montero, M. F.; Paola, C. A.; Platzeck, A. M.

    Los modelos bidimensionales para describir hojas de corriente de alta simetría no suministran una descripción detallada de las regiones donde la difusión es considerablemente importante. Tal es el caso de los modelos desarrollados en la década del '60 por Sweet, Parker, Petschek y Sonnerup. En esta comunicación presentamos una solución de las ecuaciones MHD en el entorno del origen, construyendo series bidimensionales para todas las magnitudes físicas involucradas. Valiéndonos de la alta simetría y de las características del problema, logramos reducir el número de coeficientes a calcular. Utilizamos un programa autoconsistente para extender el cálculo a regiones vecinas con difusión moderada o despreciable.

  7. Algoritmos genéticos para la resolución de problemas de Programación por Metas Entera. Aplicación a la Economía de la Educación

    Microsoft Academic Search

    Rafael Caballero; Julián Molina Luque; Angel Torrico González; Trinidad Gómez Nuñez

    En este trabajo se presenta un algoritmo genético para la resolución de problemas de Programación por Metas Entera. Este tipo de problemas presentan en general un gran número de dificultades para su resolución utilizando algoritmos tradicionales de Programación Entera, siendo en la mayoría de los casos de problemas reales demasiado costosa computacionalmente para afrontarla con garantías. Sin embargo, se mostrará

  8. Evaluación de la facilitación del comercio y el transporte: Una herramienta práctica para su implementación en los países

    Microsoft Academic Search

    Banco Interamericano de Desarrollo

    2010-01-01

    En este documento se presenta una herramienta para evaluar los obstáculos en las cadenas de abastecimiento internacional y las medidas necesarias para superarlos. Esta herramienta se ha diseñado para los grupos interesados en la facilitación del comercio y la logística en los países en vías de desarrollo, tales como los oficiales de los gobiernos responsables de formular políticas, los especialistas

  9. Reglas y Estrategias de Transformaci'on para Programas L'ogico--Funcionales

    E-print Network

    Alpuente, María

    Alba U.P. Valencia Mayo de 2000 #12; #12; Resumen El problema de la integraci'on de la programaci'on l programaci'on declarativa. Para que los lenguajes declarativos sean ' utiles y puedan utilizarse en apli

  10. Successful Mnemonics for "por"/"para" and Affirmative Commands with Pronouns.

    ERIC Educational Resources Information Center

    Mason, Keith

    1992-01-01

    Two mnemonic devices, "4A Rule" and "PERFECT," are described to simplify the learning of two grammar points: the placement of object pronouns with respect to commands and the distinction between "por" and "para." (five references) (LB)

  11. Communications: Development and characterization of a source of rotationally cold, enriched para-H3+

    NASA Astrophysics Data System (ADS)

    Tom, Brian A.; Mills, Andrew A.; Wiczer, Michael B.; Crabtree, Kyle N.; McCall, Benjamin J.

    2010-02-01

    In an effort to develop a source of H3+ that is almost entirely in a single quantum state (J =K=1), we have successfully generated a plasma that is enriched to ˜83% in para-H3+ at a rotational temperature of 80 K. This enrichment is a result of the nuclear spin selection rules at work in hydrogenic plasmas, which dictate that only para-H3+ will form from para-H2, and that para-H3+ can be converted to ortho-H3+ by subsequent reaction with H2. This is the first experimental study in which the H2 and H3+ nuclear spin selection rules have been observed at cold temperatures. The ions were produced from a pulsed solenoid valve source, cooled by supersonic expansion, and interrogated via continuous-wave cavity ringdown spectroscopy.

  12. Lo que usted debe saber antes de dar sus tejidos para investigación médica

    Cancer.gov

    Contiene información sobre las cosas que usted debe saber y tener en cuenta al tomar una decisión de donar sus tejidos para investigación. El tejido puede incluir materiales de su cuerpo tales como piel, cabello, uñas, sangre y orina.

  13. revised January 2009 Formulario de Inscripcin para Voluntario de 4-H

    E-print Network

    Tullos, Desiree

    ,000 Sexo: ( ) Nativo Hawaiano o Islas del Pacifico ( ) Suburbio mas de 50,000 ( ) Masculino ( ) Blanco o para todos sin tener en cuenta raza, color, religión, sexo, orientación sexual, nacionalidad, edad

  14. The design and synthesis of linear and macrocyclic Poly(para-arylene)s

    E-print Network

    Batson, Joel Marcus

    2013-01-01

    Poly(para-phenylene) (PPP) has generated sustained scientific interest due to its potential as a blue-emitting material for use in Organic Light Emitting Devices (OLEDs). However, due to its highly unfavorable solubility, ...

  15. ParaLearn: a massively parallel, scalable system for learning interaction networks on FPGAs

    Microsoft Academic Search

    Narges Bani Asadi; Christopher W. Fletcher; Greg Gibeling; John Wawrzynek; Wing H. Wong; Garry P. Nolan; Zoey Zhou

    2010-01-01

    ParaLearn is a scalable, parallel FPGA-based system for learning interaction networks using Bayesian statistics. ParaLearn includes problem specific parallel\\/scalable algorithms, system software and hardware architecture to address this complex problem. Learning interaction networks from data uncovers causal relationships and allows scientists to predict and explain a system's behavior. Interaction networks have applications in many fields, though we will discuss them

  16. v*i*d*a lab: repensar los objetos para la vida cotidiana

    Microsoft Academic Search

    Alejandro Tamayo

    2009-01-01

    v*i*d*a lab (2005-2008) fue un taller experimental para estudiantes de diseño industrial de la Pontificia Universidad Javeriana de Bogotá (Colombia ) el cual exploró la concepción de nuevos objetos para la vida cotidiana tomando como punto de partida acercamientos de distintas disciplinas sobre el fenómeno de la vida. El presente texto expone las principales re flexiones del taller, sus ejercicios

  17. Vers de nouvelles molécules antibactériennes. Intérêt du  para-guanidinoéthylcalix[4]arène

    Microsoft Academic Search

    M. Grare; M. Mourer; J.-B. Regnouf de Vains; R.-E. Duval

    2006-01-01

    We present here the results concerning the antibacterial properties evaluation of para-guanidinoethylcalix[4]arene, compared with its constitutive monomer, the para-guanidinoethylphenol, and hexamidine (Hexomédine®), an antiseptic from the diamidine family widely used in therapeutic, chosen as a reference in this study for its resemblance in terms of functional groups. Antibacterial activities of those three compounds were evaluated by microdilution methods, in Mueller

  18. Una alternativa terapéutica para micosis superficiales An alternative therapy to superficial mycosis

    Microsoft Academic Search

    RESUMEN: se realizaron ensayos in-vivo e in-vitro de una solución saturada de sacarosa, eugenol (0.4%v\\/v) y polietilenglicol 400 (0.4%v\\/v) para determinar su acción fungicida sobre cepas productoras de micosis superficiales y su genotoxicidad. A suspensiones de Microsporum canis, Trichophyton rubrum, Trichophyton mentagrophytes y Epidermophyton flocosum, se les agregó la solución de ensayo y se hicieron cultivos en agar Sabouraud para

  19. Desenvolvimento de um data logger portátil para sinais de movimento utilizando cartões MMC

    Microsoft Academic Search

    R. E. M. Farias; J. P. J Conti; E. F. Manffra; P. Nohama

    Resumo - Neste artigo descreve-se o desenvolvimento de um data logger portátil para armazenagem de sinais relacionados ao movimento humano. O sistema utiliza cartões MultiMediaCard™ como dispositivo de armazenamento de alta capacidade e um microcontrolador com oito canais de conversão A\\/D para entrada dos sinais analógicos provenientes de sensores de movimento ou eletrodos de eletromiografia. A taxa de amostragem pode

  20. Curing of some epoxy-acrylate glycidyl ethers based on para-alkyl substituted phenols

    Microsoft Academic Search

    C. N. Ca?caval; D. Ro?u; A. Stoleriu

    1997-01-01

    Curing of epoxy-acrylate glycidyl ethers based on phenol and para-alkyl [?CH3, ?C(CH3)3, ?C9H19] substituted phenols in the presence of benzoyl peroxide was examined by differential scanning calorimetry at different heating rates. The tested monomers polymerize first as acrylic monomers and the reaction continues by the curing process only in the case of the epoxy-acrylate glycidyl ethers of para-alkyl substituted phenols,

  1. Hibridacion entre Filtros de Particulas y Meta-heuristicas para resolver problemas dinamicos

    E-print Network

    Pantrigo Fernández, Juan José

    optimizaci´on en los cuales la descripci´on del problema y/o los datos relevantes cambian en el tiempo. Para de adaptaci´on a cambios. Los m´etodos metaheur´isticos son procedimientos para explorar de forma´es de la hibridaci´on de los m´etodos anteriores. 1. Introducci´on Muchos problemas de optimizaci´on con

  2. Un Algoritmo Genetico para Aprendizaje de un Sistema Basado en Reglas Difusas tipo

    E-print Network

    Granada, Universidad de

    Un Algoritmo Gen´etico para Aprendizaje de un Sistema Basado en Reglas Difusas tipo Takagi Sugeno F´atico, sistemas basados en reglas difusas TS, algoritmos gen´eticos, I. INTRODUCCI ´ON El modelado difuso ling´on por m´inimos cuadrados. Para la definici´on de la BD se emplear´a un Algoritmo Gen´etico que incluye

  3. REPERTORIO DIDÁCTICO ESPAÑOL EN EL MARCO DE LA ENSEÑANZA PARA CUERDA EN EL CONSERVATORIO DE MADRID EN EL SIGLO XIX: OBRAS PARA VIOLÍN, VIOLONCELLO Y VIOLA

    Microsoft Academic Search

    Mónica García Velasco

    2005-01-01

    El análisis del conjunto de aportaciones al repertorio didáctico para violín, viola y violoncello, realizadas por autores vinculados al Conservatorio de Madrid durante el siglo XIX, pone de manifiesto la conexión de la enseñanza de cuerda con modelos europeos, al tiempo que representa un capítulo imprescindible dentro del estudio de la música instrumental española en esa centuria. El Método Elemental

  4. ALCHEMIST (Estudios sobre la Secuenciación e Identificación de Marcadores para el Mejoramiento de la Terapia Adjuvante para el Cáncer de Pulmón): Preguntas y respuestas

    Cancer.gov

    ALCHEMIST comprende tres estudios clínicos integrados de medicina de precisión diseñados para identificar a personas con cáncer de pulmón en estadio inicial cuyos tumores tienen ciertos cambios genéticos poco comunes. También buscan evaluar si los tratamientos con medicamentos que combaten esos cambios moleculares pueden mejorar la supervivencia

  5. CONSTRUIR SIGNIFICADOS AL EMPLEAR MAPAS CONCEPTUALES SOPORTADOS EN LAS TECNOLOGÍAS (To construct to meaning when using sopported conceptual maps in the technologies)

    Microsoft Academic Search

    Anny Castillo Rojas

    2009-01-01

    La propuesta expone implicaciones del empleo de mapas conceptuales para la elaboración de significados aplicando herramientas tecnológicas. El mapa conceptual es un instrumento para la organización y elaboración de significados en la matriz cognoscitiva. Hernández (2005), afirma que permite seleccionar estrategias, identificar concepciones y elaborar constructos. Asimismo, se muestra una reflexión a partir de experiencias con estudiantes universitarios en dos

  6. Competing ParA structures space bacterial plasmids equally over the nucleoid.

    PubMed

    Ietswaart, Robert; Szardenings, Florian; Gerdes, Kenn; Howard, Martin

    2014-12-01

    Low copy number plasmids in bacteria require segregation for stable inheritance through cell division. This is often achieved by a parABC locus, comprising an ATPase ParA, DNA-binding protein ParB and a parC region, encoding ParB-binding sites. These minimal components space plasmids equally over the nucleoid, yet the underlying mechanism is not understood. Here we investigate a model where ParA-ATP can dynamically associate to the nucleoid and is hydrolyzed by plasmid-associated ParB, thereby creating nucleoid-bound, self-organizing ParA concentration gradients. We show mathematically that differences between competing ParA concentrations on either side of a plasmid can specify regular plasmid positioning. Such positioning can be achieved regardless of the exact mechanism of plasmid movement, including plasmid diffusion with ParA-mediated immobilization or directed plasmid motion induced by ParB/parC-stimulated ParA structure disassembly. However, we find experimentally that parABC from Escherichia coli plasmid pB171 increases plasmid mobility, inconsistent with diffusion/immobilization. Instead our observations favor directed plasmid motion. Our model predicts less oscillatory ParA dynamics than previously believed, a prediction we verify experimentally. We also show that ParA localization and plasmid positioning depend on the underlying nucleoid morphology, indicating that the chromosomal architecture constrains ParA structure formation. Our directed motion model unifies previously contradictory models for plasmid segregation and provides a robust mechanistic basis for self-organized plasmid spacing that may be widely applicable. PMID:25521716

  7. Spontaneous Emission Between - and Para-Levels of Water-Ion H_2O^+

    NASA Astrophysics Data System (ADS)

    Tanaka, Keiichi; Harada, Kensuke; Nanbu, Shinkoh; Oka, Takeshi

    2012-06-01

    Nuclear spin conversion interaction of water ion, H_2O^+, has been studied to derive spontaneous emission lifetime between ortho- and para-levels. H_2O^+ is a radical ion with the ^2B_1 electronic ground state. Its off-diagonal electron spin-nuclear spin interaction term, Tab(S_a? I_b + S_b? I_a), connects para and ortho levels, because ? I = I_1 - I_2 has nonvanishing matrix elements between I = 0 and 1. The mixing by this term with Tab = 72 MHz predicted by ab initio theory in the MRD-CI/Bk level, is many orders of magnitude larger than for closed shell molecules because of the large magnetic interaction due to the un-paired electron. Using the molecular constants reported by Mürtz et al. by FIR-LMR, we searched for ortho and para coupling channels below 1000 cm-1 with accidental near degeneracy between para and ortho levels. For example, hyperfine components of the 42,2(ortho) and 33,0(para) levels mix by 1.2 × 10-3 due to their near degeneracy (? E = 0.417 cm-1), and give the ortho-para spontaneous emission lifetime of about 0.63 year. The most significant low lying 10,1(para) and 11,1(ortho) levels, on the contrary, mix only by 8.7 × 10-5 because of their large separation (? E = 16.267 cm-1) and give the spontaneous emission lifetime from 10,1(para) to 00,0(ortho) of about 100 year.These results qualitatively help to understand the observed high ortho- to para- H_2O^+ ratio of 4.8 ± 0.5 toward Sgr B2 but they are too slow to compete with the conversion by collision unless the number density of the region is very low (n ˜1 cm-3) or radiative temperature is very high (T_r > 100 K). M. Staikova, B. Engels, M. Peric, and S.D. Peyerimhoff, Mol. Phys. 80, 1485 (1993) P. Mürtz, L.R. Zink, K.M. Evenson, and J.M. Brown J. Chem. Phys. 109, 9744 (1998). LP. Schilke, et al., A&A 521, L11 (2010).

  8. On the Ortho:Para Ratio of H+ 3 in Diffuse Molecular Clouds

    NASA Astrophysics Data System (ADS)

    Crabtree, Kyle N.; Indriolo, Nick; Kreckel, Holger; Tom, Brian A.; McCall, Benjamin J.

    2011-03-01

    The excitation temperature T 01 derived from the relative intensities of the J = 0 (para) and J = 1 (ortho) rotational levels of H2 has been assumed to be an accurate measure of the kinetic temperature in interstellar environments. In diffuse molecular clouds, the average value of T 01 is ~70 K. However, the excitation temperature T(H+ 3) derived from the (J, K) = (1, 1) (para) and (1, 0) (ortho) rotational levels of H+ 3 has been observed to be ~30 K in the same types of environments. In this work, we present observations of H+ 3 in three additional diffuse cloud sight lines for which H2 measurements are available, showing that in four of five cases T 01 and T(H+ 3) are discrepant. We then examine the thermalization mechanisms for the ortho:para ratios of H+ 3 and H2, concluding that indeed T 01 is an accurate measure of the cloud kinetic temperature, while the ortho:para ratio of H+ 3 need not be thermal. By constructing a steady-state chemical model taking into account the nuclear spin dependence of reactions involving H+ 3, we show that the ortho:para ratio of H+ 3 in diffuse molecular clouds is likely governed by a competition between dissociative recombination with electrons and thermalization via reactive collisions with H2. Based in part on observations made with ESO Telescopes at the La Silla or Paranal Observatories under program ID 384.C-0618.

  9. ParaPep: a web resource for experimentally validated antiparasitic peptide sequences and their structures

    PubMed Central

    Mehta, Divya; Anand, Priya; Kumar, Vineet; Joshi, Anshika; Mathur, Deepika; Singh, Sandeep; Tuknait, Abhishek; Chaudhary, Kumardeep; Gautam, Shailendra K.; Gautam, Ankur; Varshney, Grish C.; Raghava, Gajendra P.S.

    2014-01-01

    ParaPep is a repository of antiparasitic peptides, which provides comprehensive information related to experimentally validated antiparasitic peptide sequences and their structures. The data were collected and compiled from published research papers, patents and from various databases. The current release of ParaPep holds 863 entries among which 519 are unique peptides. In addition to peptides having natural amino acids, ParaPep also consists of peptides having d-amino acids and chemically modified residues. In ParaPep, most of the peptides have been evaluated for growth inhibition of various species of Plasmodium, Leishmania and Trypanosoma. We have provided comprehensive information about these peptides that include peptide sequence, chemical modifications, stereochemistry, antiparasitic activity, origin, nature of peptide, assay types, type of parasite, mode of action and hemolytic activity. Structures of peptides consisting of natural, as well as modified amino acids have been determined using state-of-the-art software, PEPstr. To facilitate users, various user-friendly web tools, for data fetching, analysis and browsing, have been integrated. We hope that ParaPep will be advantageous in designing therapeutic peptides against parasitic diseases. Database URL: http://crdd.osdd.net/raghava/parapep/ PMID:24923818

  10. The formaldehyde ortho/para ratio as a probe of dark cloud chemistry and evolution

    NASA Technical Reports Server (NTRS)

    Dickens, J. E.; Irvine, W. M.

    1999-01-01

    We present measurements of the H2CO ortho/para ratio toward four star-forming cores, L723, L1228, L1527, and L43, and one quiescent core, L1498. Combining these data with earlier results by Minh et al., three quiescent cores are found to have ortho/para ratios near 3, the ratio of statistical weights expected for gas-phase formation processes. In contrast, ortho/para ratios are 1.5-2.1 in five star-forming cores, suggesting thermalization at a kinetic temperature of 10 K. We attribute modification of the ortho/para ratio in the latter cores to formation and/or equilibration of H2CO on grains with sub-sequent release back into the gas phase due to the increased energy inputs from the forming star and outflow. We see accompanying enhancements in the H2CO abundance relative to H, to support this idea. The results suggest that the formaldehyde ortho/para ratio can differentiate between quiescent cores and those in which low-mass star formation has occurred.

  11. Davis o ambiente ideal para estudantes internacionais estudarem, desenvolverem-se como cidados mundiais e fazerem amigos para toda a vida. Davis tem uma populao

    E-print Network

    California at Davis, University of

    a sociedade e o 10º lugar em termos de gastos com pesquisas. Todos os anos, mais de 30 000 alunos estudam informações Para baixar um folheto com informações sobre todos os nossos cursos, visite nosso website ou entre o ano todo, é um dos cursos de inglês intensivo mais antigos e respeitados dos EUA. Com uma carga

  12. Comparison of Divalent Transition Metal Ion ParaCEST MRI Contrast Agents

    PubMed Central

    Dorazio, Sarina J.; Olatunde, Abiola O.; Tsitovich, Pavel B.

    2013-01-01

    Transition metal ion-based paraCEST agents (TM-CEST) are a promising new class of compounds for MRI contrast. Members in this class of compounds include paramagnetic complexes of FeII, CoII and NiII. The development of the coordination chemistry for these paraCEST agents is presented with an emphasis on the choice of azamacrocycle backbone and pendent groups with the goals of controlling oxidation state, spin state and stability of the complexes. CEST spectra and images are compared for different macrocyclic complexes containing amide or heterocyclic pendent groups. The potential of paraCEST agents that function as pH and redox-activated MRI probes is discussed. PMID:24253281

  13. Irritant contact dermatitis from a black henna tattoo without sensitization to para-phenylendiamine.

    PubMed

    Kind, Fabiola; Hofmeier, Kathrin Scherer; Bircher, Andreas J

    2013-06-01

    Allergic contact dermatitis from nonpermanent black henna tattoos has been frequently reported, particularly in children. Contamination or adulteration of the dyes with para-phenylendiamine has been identified as major cause of active sensitization and elicitation of severe allergic contact dermatitis. Sequelae include permanent sensitization, hyper- or hypopigmentation, scarring, keloids, and hypertrichosis. We report a rare case of irritant dermatitis to an unknown ingredient in a black henna tattoo with consecutive hypopigmentation. Sensitization to para-phenylendiamine and other para-compounds was excluded by patch test evaluation. This is relevant for future exposure to consumer products such as hair dyes or in occupational settings. Generally, black henna tattoos, particularly if done with dyes of unknown composition, should be strongly discouraged. PMID:23690526

  14. Allergic contact dermatitis to para-phenylenediamine in a tattoo: a case report.

    PubMed

    Turan, Hakan; Okur, Mesut; Kaya, Ertugrul; Gun, Emrah; Aliagaoglu, Cihangir

    2013-06-01

    It is highly popular among children and young adults to have temporary henna tattoos on their bodies in different colors and figures. Henna is a greenish natural powder obtained from the flowers and dry leaves of Lawsonia alba plant and its allergenicity is very low. Henna is also used in combination with other coloring substances such as para-phenylenediamine in order to darken the color and create a permanent tattoo effect. Para-phenylenediamine is a substance with high allergenicity potential and may cause serious allergic reactions. Here, we aimed to draw attention to the potential harms of para-phenylenediamine containing temporary tattoos by presenting a child patient who developed allergic contact dermatitis after having a scorpion-shaped temporary tattoo on his forearm. PMID:22909181

  15. Animaciones en 3D en tiempo real para las clases de ciencias e ingeniería: Ejemplos desarrollados con el módulo de programación VPython

    Microsoft Academic Search

    Eduardo E. Rodríguez

    RESUMEN: Se describe el uso del módulo de programación VPython para desarrollar animaciones en 3D por computadora para ilustrar temas de interés para las clases. Mostramos la utilidad del uso de animaciones para reforzar las presentaciones de materias como física y matemática, entre otras. Con tales presentaciones se puede innovar en el desarrollo de las clases de ciencias e ingeniería

  16. Quantum rotation of ortho and para-water encapsulated in a fullerene cage

    PubMed Central

    Beduz, Carlo; Carravetta, Marina; Chen, Judy Y.-C.; Concistrè, Maria; Denning, Mark; Frunzi, Michael; Horsewill, Anthony J.; Johannessen, Ole G.; Lawler, Ronald; Lei, Xuegong; Levitt, Malcolm H.; Li, Yongjun; Mamone, Salvatore; Murata, Yasujiro; Nagel, Urmas; Nishida, Tomoko; Ollivier, Jacques; Rols, Stéphane; Rõõm, Toomas; Sarkar, Riddhiman; Turro, Nicholas J.; Yang, Yifeng

    2012-01-01

    Inelastic neutron scattering, far-infrared spectroscopy, and cryogenic nuclear magnetic resonance are used to investigate the quantized rotation and ortho–para conversion of single water molecules trapped inside closed fullerene cages. The existence of metastable ortho-water molecules is demonstrated, and the interconversion of ortho-and para-water spin isomers is tracked in real time. Our investigation reveals that the ground state of encapsulated ortho water has a lifted degeneracy, associated with symmetry-breaking of the water environment. PMID:22837402

  17. Técnicas de Minería de Datos para la Detección de Lavado de Activos

    Microsoft Academic Search

    Wilfredy Santamaria Ruiz

    Abstract—La tarea de detección de lavado,de activos no es un tema fácil de resolver, teniendo en cuenta las múltiples modalidades,y la evolución rápida que,este tema,ha,tenido. En la actualidad muchas entidades financieras a nivel mundial, utilizan técnicas de,minería de,datos,y modelos,estadísticos para reconocer,patrones,de comportamiento,de las transacciones fraudulentas,o de la utilización” normal”,de los clientes para detectar operaciones” sospechosas”’. Este documento,realiza una introducción,al tema

  18. Large scale visualization on the Cray XT3 using ParaView.

    SciTech Connect

    Rogers, David; Geveci, Berk (Kitware, Inc.); Eschenbert, Kent (Pittsburgh Supercomputing Center); Neundorf, Alexander (Technical University of Kaiserslautern); Marion, Patrick (Kitware, Inc.); Moreland, Kenneth D.; Greenfield, John

    2008-05-01

    Post-processing and visualization are key components to understanding any simulation. Porting ParaView, a scalable visualization tool, to the Cray XT3 allows our analysts to leverage the same supercomputer they use for simulation to perform post-processing. Visualization tools traditionally rely on a variety of rendering, scripting, and networking resources; the challenge of running ParaView on the Lightweight Kernel is to provide and use the visualization and post-processing features in the absence of many OS resources. We have successfully accomplished this at Sandia National Laboratories and the Pittsburgh Supercomputing Center.

  19. Natural bond orbital analysis of some para -substituted N -nitrosoacetanilide biological molecules

    Microsoft Academic Search

    Xiao-Hong Li; Rui-Zhou Zhang; Xian-Zhou Zhang

    2009-01-01

    Theoretical study of several para-substituted N-nitrosoacetanilide biological molecules has been performed using density functional B3LYP method with 6-31G(d,p) basis set.\\u000a Geometries obtained from DFT calculation were used to perform natural bond orbital analysis. The p characters of two nitrogen\\u000a natural hybrid orbital (NHO) ?\\u000a N3–N2 bond orbitals increase with increasing ?\\u000a p values of the para substituent group on the

  20. LIVROS DIDTICOS E SUAS FUNES PARA O PROFESSOR DE MATEMTICA NO BRASIL E NA FRANA.

    E-print Network

    Paris-Sud XI, Université de

    LIVROS DIDÁTICOS E SUAS FUN��ES PARA O PROFESSOR DE MATEMÁTICA NO BRASIL E NA FRAN�A. Clovis Gomes-Claude.Regnier@univ-lyon2.fr RESUMO Esse texto aborda as funções do livro didático de matemática em dois n que visa pôr em evidência o livro didático de matemática como «vetor de formação continuada» para os

  1. REDES-Revista hispana para el anlisis de redes sociales Vol.17,#13, Diciembre 2009

    E-print Network

    Boyer, Edmond

    REDES- Revista hispana para el análisis de redes sociales Vol.17,#13, Diciembre 2009 http://revista-redes - Universidad de Sevilla Resumen Este artículo resume una parte de nuestro trabajo sobre las redes de apoyo clasificación de los tipos de redes de apoyo de los inmigrantes con menos de diez años de residencia en España

  2. ABORDAGEM MULTIOBJETIVO PARA OTIMIZAO DE REDES DE FILAS F. R. B. Cruz

    E-print Network

    Cruz, Frederico

    1 ABORDAGEM MULTIOBJETIVO PARA OTIMIZAÇÃO DE REDES DE FILAS FINITAS F. R. B. Cruz Departamento de uma rede de filas finitas com serviço geral. Como tais objetivos são conflitantes, utiliza-se uma sistemas estocásticos. Palavras-Chaves: Redes de filas; algoritmos genéticos; otimização multiobjetivo

  3. REDES-Revista hispana para el anlisis de redes sociales Vol.15, #4, Diciembre 2008

    E-print Network

    Brandes, Ulrik

    REDES- Revista hispana para el análisis de redes sociales Vol.15, #4, Diciembre 2008 http://revista-redes.rediris.es Patrones de cambio de las redes personales de inmigrantes en Cataluña José Luis Molina1 (UAB), Jürgen Lerner2 (UK) y Sílvia Gómez Mestres3 (UAB) Resumen A través del análisis de las redes personales de

  4. Aplicao de Tcnicas de Redes Sociais para o Sucesso Alexandre Baro

    E-print Network

    da Silva, Alberto Rodrigues

    Aplicação de Técnicas de Redes Sociais para o Sucesso Educativo Alexandre Barão alexandrebarao combate ao insucesso escolar. A análise de redes sociais concentra-se nas relações existentes entre informação electrónicos, a aplicação da análise de redes sociais pode proporcionar um conjunto de inferências

  5. REDES-Revista hispana para el anlisis de redes sociales Vol.6,#7, Junio 2009

    E-print Network

    Boyer, Edmond

    REDES- Revista hispana para el análisis de redes sociales Vol.6,#7, Junio 2009 http://revista-redes propone devolverle a la relación social su importancia como unidad básica de las redes sociales, y explorar lo que constituye su "sustancia" considerada aquí como el "motivo" de las relaciones. Las redes

  6. REDES-Revista hispana para el anlisis de redes sociales Vol.19,#10, Diciembre 2010

    E-print Network

    Boyer, Edmond

    REDES- Revista hispana para el análisis de redes sociales Vol.19,#10, Diciembre 2010 http://revista-redes.rediris.es Redes de consejo en la industria biotecnológica en Francia1 Alvaro Piña-Stranger2 ­ IRISSO (CNRS artículo exploramos las redes de consejo inter-organizacionales, apoyándonos en la idea de que la

  7. Um Framework para Proviso de QoS em Redes Mveis Sem Fio1

    E-print Network

    Colcher, Sérgio

    Um Framework para Provisão de QoS em Redes Móveis Sem Fio1 Luciana dos Santos Lima, Antônio Tadeu A provisão de QoS em redes móveis sem fio integrando soluções isoladas encontradas na literatura. Esses descrita através de um cenário simulado em que serviços integrados são oferecidos sobre uma rede IP Móvel

  8. REDES-Revista hispana para el anlisis de redes sociales Vol.6,#7, Junio 2009

    E-print Network

    Paris-Sud XI, Université de

    REDES- Revista hispana para el análisis de redes sociales Vol.6,#7, Junio 2009 http://revista-redes.rediris.es En busca del contenido de las redes sociales: los "motivos" de las relaciones1 Claire Bidart2 , CNRS devolverle a la relación social su importancia como unidad básica de las redes sociales, y explorar lo que

  9. REDES-Revista hispana para el anlisis de redes sociales Vol.9,#6, Diciembre 2005

    E-print Network

    Brandes, Ulrik

    REDES- Revista hispana para el análisis de redes sociales Vol.9,#6, Diciembre 2005 http://revista-redes.rediris.es La explicación a través de la visualización de redes1 Ulrik Brandes, Universidad de Konstanz. Tercero, valoramos algunos ejemplos específicos de la visualización de redes basada en estos principios

  10. Submetido revista Pesquisa Naval Abordagem Multiobjetivo para Otimizao de Redes de Filas Finitas

    E-print Network

    Cruz, Frederico

    Submetido à revista Pesquisa Naval Abordagem Multiobjetivo para Otimização de Redes de Filas atendimento global de uma rede de filas finitas com serviço geral. Como tais objetivos são conflitantes of these important stochastic systems. Palavras-chave: Redes de filas. Algoritmos genéticos. Otimização multiobjetivo

  11. DEPENDÊNCIA DE MICORRIZAS PARA A NODULAÇÃO DE LEGUMINOSAS ARBÓREAS TROPICAIS1

    Microsoft Academic Search

    Ederson da Conceição Jesus; Jolimar Antônio Schiavo; Sérgio Miana de Faria

    RESUMO - As espécies de leguminosas Piptadenia gonoacantha e Piptadenia paniculata apresentam dificuldade para nodular e crescer em substratos esterilizados, o que dificulta a seleção de estirpes de rizóbio eficientes dessas espécies. As plantas que apresentam nódulos no campo estão micorrizadas. Assim, a boa resposta das plantas no campo pode ser devida à presença de FMAs. O objetivo deste trabalho

  12. Planejamento Hierrquico Para Enxames Robticos Baseado na Explorao do Espao de Configuraes

    E-print Network

    Chaimowicz, Luiz

    independente do número de robôs. Experimentos foram realizados em simulação e ambientes reais e os resultados espaço de configurações individual, ou definir campos vetoriais globais para con- trolar o enxame como um

  13. Montagem e Resultados Preliminares de Aparato Experimental para Estudo Térmico de Materiais Ablativos

    Microsoft Academic Search

    Gabriel Antônio de Souza Júnior; Lucas Mello de Campos Arruda; Walber Ferreira Braga; Márcia Barbosa; Henriques Mantelli

    O estudo do fenômeno físico de ablação, que ocorre em determinados materiais usados em sistemas de proteção térmica de satélites, bem como a caracterização das propriedades térmicas dos mesmos são considerados de grande importância, por representar um ponto estratégico para a tecnologia espacial. No Brasil, os estudos de materiais ablativos têm sido realizados dentro da perspectiva do Programa Nacional de

  14. Interrupting Commemoration: Thinking with Art, Thinking through the Strictures of Argentina's "Espacio para la memoria"

    ERIC Educational Resources Information Center

    Paolantonio, Mario Di

    2011-01-01

    Recently, a few buildings within the "Espacio para la memoria" in Buenos Aires have been designated as a UNESCO Centre where, amongst other educational activities, evidentiary materials of the past repression are to be stored and displayed. Another building in the complex houses a Community Centre operated by the Mothers of the Plaza de Mayo,…

  15. SELECCIN DE ACACIAS PARA LA CONSTRUCCIN DE NIDOS DE AVES: UN BENEFICIO INDIRECTO DEL MUTULISMO

    E-print Network

    Cuervo, Andrés

    SELECCI�N DE ACACIAS PARA LA CONSTRUCCI�N DE NIDOS DE AVES: UN BENEFICIO INDIRECTO DEL MUTULISMO caducifolio centroamericano, y comúnmente construyen sus nidos en acacias, principalmente en Acacia collinsii alimenta de las secreciones de los nectarios y los cuerpos de Belt de la de la acacia. Por su parte, la

  16. Creación de guía ergonómica para el diseño de interfaz de supervisión

    Microsoft Academic Search

    Pere Ponsa; Marta Díaz; Andreu Català

    En tareas de supervisión humana de sala de control industrial se aplican de forma genérica disciplinas como la ingeniería del software y la ergonomía física para el diseño de la interfaz computerizada y el diseño de la sala de control. Desde el punto de vista de la interacción persona ordenador, a estas disciplinas hay que añadir la ingeniería de la

  17. Significado de los cambios en el cuello uterino: Guía para la salud de la mujer

    Cancer.gov

    Explica los pasos que deben seguirse después de un resultado anormal en una prueba de Pap o del VPH, así como las formas de diagnosticar y tratar las afecciones en el cuello uterino. También contiene información sobre las pautas para los exámenes de detección y las vacunas contra el VPH.

  18. Estructuras de comunicación para la resolución de problemas de manera distribuida en la ingeniería concurrente

    Microsoft Academic Search

    Leonid B. Sheremetov

    Se presenta el problema de la comunicación en la resolución de problemas distribuidos. Se analizan las siguientes tecnologías de la comunicación: actores, pizarrones, las comunicaciones homogéneas y heterogéneas en un ambiente de multiagentes. Se ilustra la discusión con ejemplos del ambiente para el Diseño de Objetos Estructurados (Design of Structured Objects - DESO). El prototipo actual integra algunos sistemas preexistentes

  19. INSTRUMENTACIÓN DE GRANDES CALDERAS DE POTENCIA PARA LA APLICACIÓN DE MODELOS AVANZADOS DE INGENIERÍA

    Microsoft Academic Search

    Luis Ignacio Díez; Cristóbal Cortés; Inmaculada Arauzo

    RESUMEN La implementación de modelos de monitorización del funcionamiento de calderas de potencia requiere de gran cantidad de datos para su validación, que además deben cumplir unos mínimos requi- sitos de precisión y completitud. La importancia de estos modelos es cada día mayor, pues se aplican en el control de procesos complejos que suceden en este tipo de instalaciones. Frente

  20. 1/5 CBEB 2008 NOVO MTODO PARA COMPRESSO DE SINAIS DE EMG USANDO

    E-print Network

    Carvalho, João Luiz

    1/5 CBEB 2008 NOVO MÉTODO PARA COMPRESSÃO DE SINAIS DE EMG USANDO JPEG2000 M. V. C. Costa*, P. A for two-dimensional compression of EMG signals, namely correlation sorting. We also present an algorithm for compression of electromyographic (EMG) signals based on the JPEG2000 coding system. Originally designed

  1. Michael Faraday e o manuscrito Matter: uma solução metafísica para o problema da ação a distância

    Microsoft Academic Search

    Sonia Maria Dion

    2006-01-01

    O texto aqui traduzido, intitulado simplesmente Matéria, revela um Faraday muito pouco conhecido. É notório que Michael Faraday (1791-1867) fez grandes contribuições para a ciência do eletromagnetismo; dentre elas, duas merecem destaque: a descoberta ex- perimental da indução eletromagnética e a elaboração teórica do conceito de linhas de força, alternativa à explicação (de perspectiva newtoniana) baseada na ação a distân-

  2. Para presentar una queja en la Oficina de Equidad y Diversidad (OED), por favor incluya

    E-print Network

    Sheridan, Jennifer

    de Oportunidades de Empleo de los EE.UU. (U.S. Equal Employment Opportunity Commission) o del Estado para la Igualdad de Oportunidades en el Empleo de los Estados Unidos (U.S. Equal Employment Opportunity Commission) Reuss Federal Plaza 310 West Wisconsin Avenue, Suite 800 Milwaukee, WI 53203-2292 Teléfono: 414

  3. NOTAS TAXONÓMICAS SOBRE EL GÉNERO VALERIANELLA MILL. (VALERIANACEAE) PARA LA FLORA IBÉRICA

    Microsoft Academic Search

    Juan Antonio DEVESA; Josefa LÓPEZ; Raúl GONZALO

    2005-01-01

    RESUMEN. Notas taxonómicas sobre el género Valerianella Mill. (Valerianaceae) para la Flora Ibérica. Sobre la base de estudios experimentales que han puesto de manifiesto que Valerianella coronata y V. pumila no son sino dos morfotipos de una misma especie, que difieren fundamentalmente en caracteres carpológicos, se plantea la hipótesis de que igual sucede en el caso de V. locusta V.

  4. Factor Structure of the "Escala de Autoeficacia para la Depresion en Adolescentes" (EADA)

    ERIC Educational Resources Information Center

    Diaz-Santos, Mirella; Cumba-Aviles, Eduardo; Bernal, Guillermo; Rivera-Medina, Carmen

    2011-01-01

    The current concept and measures of self-efficacy for depression in adolescents do not consider developmental and cultural aspects essential to understand and assess this construct in Latino youth. We examined the factor structure of the "Escala de Autoeficacia para la Depresion en Adolescentes" (EADA), a Spanish instrument designed to assess this…

  5. UN ENFOQUE CONSTRUCTIVISTA PARA USO DE MAPAS CONCEPTUALES EN EDUCACIÓN A DISTANCIA DE PROFESORES

    Microsoft Academic Search

    Lea Fagundes; Alberto J. Cañas

    Resumen. Este trabajo presenta una propuesta de utilización de los mapas conceptuales en la formación de profesores a distancia usando el software CmapTools del Institute for Human and Machine Cognition, dentro de un paradigma constructivista. Nuestra propuesta utiliza como base teórica la Epistemología Genética de Jean Piaget y, en especial, la teoría de las Implicaciones Significantes para la construcción de

  6. BIBLIOTECA GRAPHICALSPRITEKERNEL (GSK): IMPLEMENTACIÓN DE UNA ARQUITECTURA DE TRES MODELOS PARA CREAR MULTIMEDIA EDUCATIVA

    Microsoft Academic Search

    Vicente Arturo Romero Zaldivar

    Resumen En este trabajo se presenta una arquitectura de tres modelos para desarrollar multimedia educativa, a través de una implementación particular de ésta, la biblioteca GraphicalSpriteKernel. Esta arquitectura está constituida por tres modelos diferentes, a emplear en tres fases fundamentales del desarrollo de una aplicación multimedia: diseño, implementación y prueba. Esta especialización permite que cada modelo incluya sólo la lógica

  7. LA PREPARACIÓN DEL PROFESOR PARA EL DESARROLLO DE HABILIDADES BÁSICAS EN EDUCACIÓN LABORAL

    Microsoft Academic Search

    Alfredo Puig Batista

    2010-01-01

    El modelo educativo de Secundaria Básica exige de un profesional que por su nivel de preparación, sea capaz de garantizar la formación integral de las presentes y futuras generaciones. En tal sentido, la presente investigación incursiona en una de las problemáticas acuciantes de esta educación “la preparación de los profesores de Secundaria Básica, para favorecer el desarrollo de habilidades prácticas

  8. SIGACLE: SIMULADOR GRÁFICO ASISTIDO POR COMPUTADOR PARA LA ENSEÑANZA DE PROGRAMACIÓN DE LENGUAJES ESTRUCTURADOS

    Microsoft Academic Search

    George Franco Cendales; María Paula Díaz; Rafael J. Barros

    Se plantea la importancia que brinda el desarrollo de herramientas asistidas por computador como apoyo al proceso de enseñanza. SIGACLE (Simulador Gráfico Asistido por Computador Para la Enseñanza de Programación de Lenguajes Estructurados), tiene como principal objetivo el desarrollo de habilidades cognoscitivas en estudiantes de pregrado en las materias de programación de computadores. Este documento define específicamente los conceptos necesarios

  9. The Combined Ortho / Para Hydrogen Assignments in H_2 Metal Chlorides

    NASA Astrophysics Data System (ADS)

    Obenchain, Daniel A.; Grubbs, G. S., II; Frank, Derek S.; Pickett, Herbert M.; Novick, Stewart E.

    2014-06-01

    The rotational spectra of H_2-AgCl and H_2-AuCl have been measured using a cavity FTMW spectrometer equipped with a laser ablation source. A combination of isotopic substitution, including HD and D_2 substitutions, and the spin-spin interaction of ortho hydrogen were used to determine the structures of these species. Trends in these structures and the strengths of the H_2 interaction will be discussed. Previous work with hydrogen containing complexes have shown that separate spectra are observed for the both the ortho and para hydrogen species. In this work, ortho and para hydrogen are assigned together. The a-axis in the present species is coincident with internal rotation axis of hydrogen. This symmetry, along with a covalent interaction of the H_2 with the metal chlorides, allows for a straightforward global assignment of the ortho and para species. The differences in the present study from the previous works will be discussed, as well as the assignment of the combined ortho and para fits. Y. Zhenhong, K. J. Higgins, W. Klemperer, M. C. McCarthy and P. Thaddeus, J. Chem. Phys., 123(2005) 221106. J. M. Michaug, W. C. Topic, W. Jäger, J. Phys. Chem. A., 115(2011) 9456 M. Ishiguro, K Harada, K. Tanaka, Y. Sumiyoshi, Y. Endo, Chem. Phys. Lett., 554(2012) 33.

  10. Notas de Aula: Fisica para Biologia: PRELIMINAR Nestor Caticha e Osame Kinouchi

    E-print Network

    Caticha, Nestor

    Notas de Aula: F´isica para Biologia: PRELIMINAR Nestor Caticha e Osame Kinouchi 17 de abril de´oxima d´ecada. H´a vezes em que a escolha de carreira dos estudantes de biologia ´e descrita usando exemplos de simbiose entre biologia e f´isica que demostram alguns dos pontos altos da

  11. Algoritmos Basados en Nubes de Particulas y Evolucion Diferencial para el Problema de

    E-print Network

    Granada, Universidad de

    Algoritmos Basados en Nubes de Part´iculas y Evoluci´on Diferencial para el Problema de Optimizaci con variables reales pode- mos destacar a los algoritmos basados en nubes de part´iculas y evoluci propuestas en la literatura. Este estu- dio permite analizar las distintas t´ecnicas en funci´on de sus

  12. Problemática de Seguridad para el Comercio Electrónico en el Sector Turístico

    Microsoft Academic Search

    Javier López; Javier Areitio; Felipe Roselló

    Resumen: Uno d e los s ervicios que c ada día cobra más importancia y que promete un cambio radical para las empresas es el comercio electrónico en Internet, pero tradicionalmente las empresas r elacionadas con el t urismo sólo han empleado la red pa ra darse a conocer y ofertar s us productos. La razón esencial es la d

  13. EL COMERCIO ELECTRÓNICO EN PAÍSES EN DESARROLLO: LA PLANEACIÓN PARA EL ÉXITO DEL NEGOCIO

    Microsoft Academic Search

    L. P. Carrillo

    2010-01-01

    Desde un enfoque que identifica al conocimiento como una fuente de capacidad de competencia en el contexto social, organizacional e individual se explica al Comercio electrónico como un proceso estratégico de las organizaciones de negocio, en el ámbito económico actual. En particular se enfatiza la trascendencia del proceso específico de planeación para el éxito del negocio a través de la

  14. The nongenotoxic carcinogens naphthalene and para-dichlorobenzene suppress apoptosis in Caenorhabditis elegans

    Microsoft Academic Search

    David Kokel; Yehua Li; Jun Qin; Ding Xue

    2006-01-01

    Naphthalene (1) and para-dichlorobenzene (PDCB, 2), which are widely used as moth repellents and air fresheners, cause cancer in rodents and are potential human carcinogens. However, their mechanisms of action remain unclear. Here we describe a novel method for delivering and screening hydrophobic chemicals in C. elegans and apply this technique to investigate the ways in which naphthalene and PDCB

  15. Arquitectura del Sistema de Gestin del ancho de Banda y Proteccin (SGBP) para entornos de redes

    E-print Network

    Ortega, Eusebi Calle

    Arquitectura del Sistema de Gestión del ancho de Banda y Protección (SGBP) para entornos de redes}@eia.udg.es Resumen. En el presente artículo se describe la arquitectura de un sistema inte- gral de gestión del ancho 4 detalla la arquitectura propuesta del sistema. Por último, se presentan las conclusiones y futuros

  16. El proyecto InterAct: Una arquitectura de pizarra para la implementacin de Entornos Activos*

    E-print Network

    Autonoma de Madrid, Universidad

    El proyecto InterAct: Una arquitectura de pizarra para la implementación de Entornos Activos en una arquitectura en la que se distinguen tres capas: la capa de contexto, la capa de interacción columna vertebral de la arquitectura de InterAct. Se ha optado por una arquitectura basada en una

  17. SÍNTESE DE POLIÉSTER PARA APLICAÇÃO EM CÉLULAS A COMBUSTÍVEL DO TIPO PEM

    Microsoft Academic Search

    R. P. Fiuza; D. R. de Souza; R. A. Fiuza; N. M. José; J. S. Boaventura

    RESUMO Dos diversos tipos de celulas a combustíveis (CaC), a PEMFC (Proton Exchange Membrane Fuel Cell) se destaca pela versatilidade de aplicações, tanto para uso estacionário como móvel. Entretanto a PEMFC apresenta alto custo de fabricação, com reflexos diretos no custo da energia produzida. Este trabalho propõem a sulfonação do ácido ftalico e polimerização deste com o glicerol, usando como

  18. Anniversary VetTech Training Hawai`i's First Para-Professionals

    E-print Network

    Olsen, Stephen L.

    facilities, and private veterinary practice (there are over 80 veterinary clinics in Hawai`i). The new a tremendous success, placing more than 70 percent of graduates in the veterinary industry. Building40th Anniversary VetTech Training Hawai`i's First Para-Professionals Veterinary Technology is among

  19. SISTEMA REMOTO DE ADQUISICIÓN PARA EL CONTROL DEL RUIDO AMBIENTAL CON FPGA Y FPAA

    Microsoft Academic Search

    A. Castillo Atoche; J. Vázquez Castillo; V. Sanchez Huerta; P. Del Río Dawn

    RESUMEN Este artículo propone el diseño de un sistema de adquisición de datos con componentes digitales y analógicos microelectrónicos reconfigurables, como son el FPGA (Field Programmable Gate Array) y el FPAA (Field Programmable Analog Array), para monitorear y analizar la contaminación por ruido ambiental. Este prototipo obtiene los datos del ruido de una zona vial (zona centro de una ciudad)

  20. UNA EXPERIENCIA DE TRABAJO PARA EL DESARROLLO LOCAL EN UNA COMUNIDAD URBANA DE CUBA

    Microsoft Academic Search

    Milena Gómez Navarro

    2008-01-01

    La presente monografía titulada: Una experiencia de trabajo para el desarrollo local en una comunidad urbana de Cuba es fruto de una investigación realizada hace algún tiempo ya, en el cual se ha contado con el apoyo del CITMA por ser el órgano rector en cuestión del medio ambiente en Cuba, específicamente en este caso se obtuvo la ayuda de

  1. Estudio para la Detección de Plomo en Alimentos de Origen Vegetal por Análisis Infrarrojo

    Microsoft Academic Search

    Daniel Octavio García Romero; Leopoldo Félix; Yabar Escribanel

    Resumen— El objetivo del estudio es determinar un método no invasivo, basado en espectroscopia infrarroja, que sirva como herramienta para la detección de plomo en alimentos de origen vegetal. Teniendo presente que los vegetales son una parte importante de nuestra dieta, resulta necesario realizar investigaciones referentes a la presencia de metales pesados en los vegetales, en este caso plomo. El

  2. Taller: Enfoque Multisectorial para la Seguridad Alimentaria y Nutricin 7-8 Marzo 2013

    E-print Network

    Liu, X. Shirley

    desarrollo del sector agrícola más sostenible ambientalmente? ¿Cuál es el rol de los gobiernos y demás Multilaterales de la Agencia Colombiana de Cooperación Internacional para el Desarrollo. Colombia. Con recursos. Coordinador de la Alianza Panamericana de Nutrición y Desarrollo. Moderador: Pablo Mandeville. Coordinador

  3. Indicadores de gestión urbana. Los observatorios urbano-territoriales para el desarrollo sostenible. Manizales, Colombia

    Microsoft Academic Search

    Luz Stella Velásquez

    2001-01-01

    Los Observatorios para el Desarrollo Sostenible del Municipio de Manizales en Colombia, hacen parte del Sistema de Monitoreo diseñado por el Municipio como apoyo a la gestión urbana local. A partir de los resultados de indicadores económicos, sociales y ambientales, los ciudadanos podrán evaluar de forma permanente el desempeño de programas y proyectos del Plan de Desarrollo Municipal y participar

  4. O e-learning como etapa da universidade para o virtual

    Microsoft Academic Search

    Resumo. A adopção de práticas de ensino a distância ou presencial de suporte electrónico, normalmente designadas por e-learning, tem sido vistas como a direcção a seguir para um ensino superior, moderno e adequado à realidade da Sociedade da Informação. Tendo em linha de conta a realidade específica da Universidade Fernando Pessoa, é traçado pelos autores uma reflexão que sustenta que

  5. EL “WIKI” COMO RECURSO PARA DESARROLLAR COMPETENCIAS EN EL PROCESO DE ENSEÑANZA-APRENDIZAJE

    Microsoft Academic Search

    Mabel López García; José María Souvirón Morenilla

    2010-01-01

    En el presente trabajo se analiza la utilidad de las tecnologías de la información y la comunicación (TIC), y específicamente del “Wiki”, como herramienta para el modelo de enseñanza-aprendizaje derivado del Espacio Europeo de Educación Superior (EEES). Se realiza una aproximación al significado del EEES y al modelo de enseñanza que propone, en el que lo relevante no es tanto

  6. On the Ortho:Para Ratio of H3+ in Diffuse Molecular Clouds

    E-print Network

    Crabtree, Kyle N; Kreckel, Holger; Tom, Brian A; McCall, Benjamin J

    2011-01-01

    The excitation temperature T_01 derived from the relative intensities of the J = 0 (para) and J = 1 (ortho) rotational levels of H2 has been assumed to be an accurate measure of the kinetic temperature in interstellar environments. In diffuse molecular clouds, the average value of T_01 is ~70 K. However, the excitation temperature T(H3+) derived from the (J,K) = (1,1) (para) and (1,0) (ortho) rotational levels of H3+ has been observed to be ~30 K in the same types of environments. In this work, we present observations of H3+ in three additional diffuse cloud sight lines for which H2 measurements are available, showing that in 4 of 5 cases T_01 and T(H3+) are discrepant. We then examine the thermalization mechanisms for the ortho:para ratios of H3+ and H2, concluding that indeed T_01 is an accurate measure of the cloud kinetic temperature, while the ortho:para ratio of H3+ need not be thermal. By constructing a steady-state chemical model taking into account the nuclear-spindependence of reactions involving H3...

  7. ConPor: um modelo de gerao conceitual para o Lucia Specia, Lucia Helena Machado Rino

    E-print Network

    Specia, Lucia

    ConPor: um modelo de geração conceitual para o português Lucia Specia, Lucia Helena Machado Rino ­ 13565-905 ­ São Carlos ­ SP ­ Brasil {lspecia,lucia}@dc.ufscar.br Abstract. This paper describes Con

  8. REVISION DE MARCOS TEORICOS EDUCATIVOS PARA EL DISEÑO Y USO DE PROGRAMAS DIDÁCTICOS

    Microsoft Academic Search

    Z. Cataldi; F. Lage; R. Pessacq; García Martínez

    RESUMEN Se desea presentar la aparición del software educativo y su evolución a la luz de algunas de las teorías educati- vas más representativas. En este paralelismo, sólo se mencionan aquellas teorías y\\/o autores que darán los marcos con- ceptuales para los desarrollos de los programas didácticos en función de las aplicaciones deseadas. Partiendo del con- ductismo skinneriano1, se pasa

  9. EMPLEO DE FRACCIONES CELULARES DE LA LEVADURA Saccharomyces cerevisiae COMO ADITIVO ALIMENTARIO PARA Artemia franciscana

    Microsoft Academic Search

    Yamilé Comabella; Tsai García-Galano; Olimpia Carrillo; Yadir Mauri

    RESUMEN En el presente estudio se evalúa la levadura Saccharomyces cerevisiae de forma desintegrada (LD) y tres fracciones celulares obtenidas de ella: complejo pared-membrana (FP), núcleo-proteínas (FN) y citoplasma (FC) como aditivo alimentario utilizando al crustáceo Artemia franciscana como modelo de experimentación. Se realizaron dos bioensayos para determinar el efecto que ejercían dichos aditivos en el crecimiento, biomasa seca, supervivencia

  10. ELEMENTOS DE CONTEXTO DE LA POLÍTICA MIGRATORIA PARA TRABAJADORES EXTRANJEROS NO COMUNITARIOS EN ESPAÑA

    Microsoft Academic Search

    ROCÍO BEDOYA

    2010-01-01

    La política migratoria es considerada un objetivo primordial en España, por eso el análisis las directrices en trabajadores extranjeros no comunitarios es el tema de este artículo. Objetivo: identificar los elementos de contexto de la política migratoria. Metodología: Se trata de la revisión analítica de las políticas y sistematización de la literatura sobre el tema de la política migratoria para

  11. Se necesitan 50 000 fumadores y exfumadores para el Estudio Nacional de Exámenes de Pulmón (NLST)

    Cancer.gov

    El Instituto Nacional del Cáncer (NCI) lanzó hoy un nuevo estudio para determinar si el examinar a las personas ya sea con una tomografía computarizada espiral o con una radiografía de pecho antes de que tengan síntomas puede reducir las muertes por cáncer de pulmón.

  12. ACADEMIA DE POLCIA CIVIL CONCURSO PBLICO PARA PROVIMENTO DE VAGAS E FORMAO DE CADASTRO DE RESERVA

    E-print Network

    Maier, Rudolf Richard

    ACADEMIA DE POLÍCIA CIVIL CONCURSO P�BLICO PARA PROVIMENTO DE VAGAS E FORMA��O DE CADASTRO DE ACADEMIA DE POLÍCIA CIVIL DO DISTRITO FEDERAL (APCDF), no uso de suas atribuições legais, torna pública Diretor da Academia de Polícia Civil do Distrito Federal #12;

  13. Long-range excitons in conjugated polymers with ring torsions: poly(para-phenylene) and polyaniline

    E-print Network

    Harigaya, Kikuo

    Long-range excitons in conjugated polymers with ring torsions: poly(para-phenylene) and polyaniline (Running head: Long-range excitons in conjugated polymers) Kikuo Harigaya Physical Science Division formalism. Long-range excitons are charac- terized, and the long-range component of the oscillator strengths

  14. Antimicrobial effect of para-alkoxyphenylcarbamic acid esters containing substituted N-phenylpiperazine moiety

    PubMed Central

    Malík, Ivan; Bukovský, Marián; Andriamainty, Fils; Gališinová, Jana

    2013-01-01

    In current research, nine basic esters of para-alkoxyphenylcarbamic acid with incorporated 4-(4-fluoro-/3-trifluoromethylphenyl)piperazin-1-yl fragment, 6i–6m and 8f–8i, were screened for their in vitro antimicrobial activity against Candida albicans, Staphylococcus aureus and Escherichia coli, respectively. Taking into account the minimum inhibitory concentration assay (MIC), as the most active against given yeast was evaluated 8i (MIC = 0.20 mg/mL), the most lipophilic structure containing para-butoxy and trifluoromethyl substituents. Investigating the efficiency of the compounds bearing only a single atom of fluorine and appropriate para-alkoxy side chain against Candida albicans, the cut-off effect was observed. From evaluated homological series, the maximum of the effectiveness was noticed for the stucture 6 k (MIC = 0.39 mg/mL), containing para-propoxy group attached to phenylcarbamoyloxy fragment, beyond which the compounds ceased to be active. On the contrary, all the tested molecules were against Staphylococcus aureus and Escherichia coli (MICs > 1.00 mg/mL) practically inactive. PMID:24294237

  15. Estados Unidos y cuatro países de América Latina se unen para combatir el cáncer

    Cancer.gov

    El Instituto Nacional del Cáncer (NCI) de Estados Unidos formalizó esta semana alianzas bilaterales con los gobiernos de Argentina, Brasil, México y Uruguay, para acelerar el avance contra el cáncer en la población hispana de Estados Unidos y de América Latina y mejorar la investigación del cáncer.

  16. Métodos de depuración HW-SW para sistemas on chip reconfigurables

    Microsoft Academic Search

    Guillermo Talavera; Vincent Nollet; Jean-Yves Mignolet; Diederick Verkest; Rudy Lauwereins; Jordi Carrabina

    El dinamismo de las aplicaciones en sistemas on chip reconfigurables re- quiere un eficiente uso de los recursos disponibles. Para permitir la asignación en tiempo real de los recursos, el sistema operativo y la plataforma SoC reconfigurable han de estar diseñadas en paralelo. En este contexto, el desarrollo del hardware y software encastado presenta los inconvenientes individuales de cada uno,

  17. Sensores CMOS para robotica e industria: Sensor ret nico espacio variante y vision activa

    E-print Network

    Valencia, Universidad de

    Sensores CMOS para robotica e industria: Sensor ret nico espacio variante y vision activa Fernando Pardo, Francisco Vegara, Jose A. Boluda, Santiago Felici Instituto de Robotica Universidad de Valencia C venido estudiando especialmente en el terreno de aplicaciones en robotica 2]. Sin em- bargo, en el

  18. AstroFácil: Sistema Computacional Embarcado para Automatização de Telescópios de Pequeno Porte

    Microsoft Academic Search

    Marcos Roberto Silva; Maicon Carlos Pereira; Caroline Farias Salvador; Rafael Luiz Cancian; Roberto Miguel Torres; Cesar Albenes Zeferino

    2006-01-01

    O uso de telescópios de pequeno porte na observação astronômica amadora é muitas vezes restringido pela dificuldade que astrônomos amadores enfrentam para localizar um astro desejado e acompanhá-lo no céu. Este artigo apresenta o desenvolvimento de um sistema embarcado a ser utilizado na automação de telescópios de pequeno porte visando facilitar a operação desses equipamentos por amadores. O sistema é

  19. Mdulo II.-Amenazas para la biodiversidad l La sexta gran extincin

    E-print Network

    Rey Benayas, José María

    Módulo II.- Amenazas para la biodiversidad l La sexta gran extinción l Cambio global l Causas y ejemplos de extinción y amenaza Fecha actualización: 14-11-13 #12;n La diversidad de especies en la Tierra riesgo de extinción global desde 1980 #12;Geografía de las amenazas a la seguridad del agua y la

  20. Tutorial sobre o uso de Geotecnologias no estudo de Bacias Hidrogrficas para professores da Educao Bsica

    E-print Network

    Tutorial sobre o uso de Geotecnologias no estudo de Bacias Hidrográficas para professores da of hydrographic basing degradation, a tutorial was developed for secondary school teachers to use in environmental education and other environmentally-based subjects. This tutorial gives them the possibility of performing

  1. Regulamenta os procedimentos para a alocao de vagas docentes de Magistrio Superior da

    E-print Network

    Liu, I-Shih

    Universidade Federal do Rio de Janeiro. O Conselho de Ensino de Graduação (CEG) e o Conselho de Ensino para 2006; Considerando: a. que a admissão de professores na Universidade Federal do Rio de Janeiro é um Universidade Federal do Rio de Janeiro; d. que o banco de professores-equivalente corresponderá à soma dos

  2. Para-Professionals in Further Education: Changing Roles in Vocational Delivery

    ERIC Educational Resources Information Center

    Scott, Gill

    2005-01-01

    Roles and structures within further education colleges seem to be in constant change and development; roles are becoming blurred, and lecturers are taking on more management tasks. Alongside this has been the development of para-professional roles, using non-lecturers to undertake teaching tasks. This can allow for the greater involvement of…

  3. Involvement of mitochondrial ferredoxin and para-aminobenzoic acid in yeast coenzyme Q biosynthesis

    E-print Network

    Boyer, Edmond

    1 Involvement of mitochondrial ferredoxin and para-aminobenzoic acid in yeast coenzyme QABA is a precursor of yeast coenzyme Q *Manuscript Click here to view linked References #12;2 Summary Yeast ubiquinone or coenzyme Q6 (Q6) is a redox active lipid with a crucial role in the mitochondrial electron

  4. Computer-controlled radiation therapy machine for pelvic and para-aortic nodal areas

    Microsoft Academic Search

    Lee M. Chin; Peter K. Kijewski; Göran K. Svensson; John T. Chaffey; Martin B. Levene; B. E. Bjaerngard

    1981-01-01

    A computer-controlled radiation therapy technique has been developed to treat cancer of the uterine cervix that has extended to the pelvic and para-aortic lymph nodes. During five longitudinal scans with a 4 cm wide 8 MV X ray beam, conformation of the high dose region to the target volume was achieved primarily by varying the other field dimensions. Treatment planning

  5. Hacia un framework Orientado a Objetos para Bills of Materials Complejos

    Microsoft Academic Search

    Marcela Vegetti; Gabriela Henning; Horacio Leone

    Las empresas de producción industrial se enfrentan por un lado, a los cambios constantes de las condiciones del mercado, como po r ejemplo, los patrones de demanda, ciclo de vida de los productos mucho más cortos, etc. Por otro, a un mercado global, que requiere que la cadena de suministros, alcance muy altos niveles de eficiencia. Para mantener la competitividad

  6. Um Instrumento para a Avaliação de Estressores Psicossociais no Contexto de Emprego

    Microsoft Academic Search

    Nora Leibovich de Figueroa; Marta Schufer; Roberto Muiños; Claudia Marro; Elizabeth Aranda Coria

    2001-01-01

    Resumo Os contextos onde se desenvolvem as atividades humanas apresentam características diferentes que têm importantes implicações no momento da elaboração e aplicação de procedimentos de avaliação. O contexto de emprego é muito importante para importantes setores de nossa população. Moos desenvolveu um marco conceitual sócio-ecológico no qual a relação, entre os acontecimentos vitais estressantes e as condutas adaptativas, encontra-se influenciada

  7. Metaheurística algoritmo genético para solução de problemas de planejamento florestal com restrições de integridade

    Microsoft Academic Search

    Flávio Lopes Rodrigues; Helio Garcia Leite; Heleno do Nascimentos Santos; Agostinho Lopes de Souza; Gilson Fernandes da Silva

    2004-01-01

    2 RESUMO - Os objetivos deste trabalho foram desenvolver e testar um algoritmo genético (AG) para a solução de problemas de gerenciamento florestal com restrições de integridade. O AG foi testado em quatro problemas, contendo entre 93 e 423 variáveis de decisão, sujeitos às restrições de singularidade, produção mínima e produção máxima, periodicamente. Todos os problemas tiveram como objetivo a

  8. Diseño y evaluación de una interfaz móvil para lectura de medidores de energía

    Microsoft Academic Search

    Víctor Álvarez-Cortés; Benjamín Zayas-Pérez

    2005-01-01

    El Instituto de Investigaciones Eléctricas (IIE) havenido trabajando durante varios años en el área deAMR (Lectura Automática de Medidores, por sus siglas eninglés) así como en la deteccón del robo deenergía eléctrica como líneasestratégicas para el desarrollo de infraestructura interna ytambién como respuesta a las demandas deautomatización de la Comisión Federal de Electricidad(CFE) y de la Compañía de Luz y

  9. Desarrollo de un servidor HTTP para dispositivos moviles en J2ME

    Microsoft Academic Search

    Guillermo Diez-Andino Sancho; Rosa Ma Garc; Celeste Campo

    El protocolo HTTP viene siendo ampliamente utilizado desde el nacimiento de la web, en donde es indispensable para la creacion de aplicaciones que hacen uso deesta. Con la llegada de las tecnolog´ias moviles pueden darse diversas situaciones en las que la creacion de un servidor HTTP en dispositivos limitados pueda resultar de gran utilidad. Un ejemplo, es la comparticion de

  10. Reconocimiento de Palabras Aisladas Utilizando LPC Y DTW, para control de navegación de un

    Microsoft Academic Search

    Y. Baquero; Z. Alezones

    Resumen—La utilización de herramientas computacionales, hardware y software con capacidades de desarrollo en torno al manejo de modelos bioinspirados generó la construcción de un minirobot móvil aplicando la caracterización de comandos de voz y el aprovechamiento de las capacidades de procesamiento paralelo ofrecidas por el gene digital para gobernar la correspondiente navegación. A nivel general en la etapa de software

  11. Esquema Adaptativo de Reserva para el Control de Admisión Jerárquico en Redes Móviles Celulares

    Microsoft Academic Search

    David García Roger; Jorge Martínez

    Se propone un esquema adaptativo de reserva diseñado para trabajar en cooperación con la política de con- trol de admisión Multiple Guard Channel (MGC). El esquema ajusta los parámetros de configuración de MGC mediante un seguimiento continuo de la calidad de servicio (QoS) percibida por el usuario y permite adaptar la política a cualquier combi- nación de tráfico entrante, permitiendo

  12. Irradiation of para-aortic lymph node metastases from carcinoma of the cervix or endometrium

    SciTech Connect

    Komaki, R.; Mattingly, R.F.; Hoffman, R.G.; Barber, S.W.; Satre, R.; Greenberg, M.

    1983-04-01

    Twenty-two patients with biopsy-proved para-aortic lymph node metastases from carcinoma of the cervix (15 patients) or endometrium (7 patients) received a median dose of 5,000 rad/25 fractions. Para-aortic nodal metastases were controlled in 77% of cases. Control was significantly lower following radical retroperitoneal lymph node dissection than less extensive sampling procedures. Obstruction of the small bowel developed in 3 patients with tumor recurrence in the para-aortic region. Eight of the 10 patients who were disease-free at 2 years received >5,000 rad. Three patients were still alive without disease at 129, 63, and 60 months, respectively. The 5-year disease-free survival rate was 40% for cervical cancer and 60% for endometrial cancer: in the former group, it was significantly different depending on whether the para-aortic nodes were irradiated (40%) or not (0%). The authors suggest that 5,000-5,500 rad in 5-5.5 weeks is well tolerated and can control aortic nodal metastases in cervical and possibly endometrial cancer.

  13. Control mioeléctrico para movimientos en 2D de un manipulador robótico industrial

    Microsoft Academic Search

    Natalia López; Carlos Soria; Eugenio Orosco; Fernando di Sciascio; Máximo Valentinuzzi

    Resumen —En este trabajo se describe un sistema de control mioeléctrico de un manipulador robótico para la ejecución de tareas sobre el plano x-y. Las señales mioeléctricas provinieron de voluntarios sanos y especialmente de amputados de miembro superior conectadas mediante placas de acondicionamiento de señal y adquisición digital al entorno MATLAB ®. Se comparó el desempeño de parámetros descriptivos de

  14. Effect of the site of infusion of para-aminohippuric acid (PAH) on portal blood flow

    E-print Network

    Paris-Sud XI, Université de

    Effect of the site of infusion of para-aminohippuric acid (PAH) on portal blood flow LM Zeoula C requirements of animals. In this context, the determination of portal blood flow is critical. When dilution techniques are used for such measurements, eg using PAH, a homogeneous mixing of the marker in the blood

  15. ADS -Accelerator Driven System -Uma tecnologia do futuro para a produo de energia nuclear

    E-print Network

    Ribas, Roberto Vicençotto

    ADS - Accelerator Driven System - Uma tecnologia do futuro para a produção de energia nuclear 1980, quando as restrições ligadas principalmente a possíveis catástrofes relacionadas à tecnologia nessa tecnologia, que poderá ser de grande importância num futuro não muito distante. 2 #12;

  16. MINISTRIO DA CINCIA, TECNOLOGIA E INOVAO (MCTI) CONCURSO PBLICO PARA PROVIMENTO DE VAGAS EM CARGOS

    E-print Network

    1 MINISTÉRIO DA CIÊNCIA, TECNOLOGIA E INOVAÇÃO (MCTI) CONCURSO PÚBLICO PARA PROVIMENTO DE VAGAS EM DA CIÊNCIA, TECNOLOGIA E INOVAÇÃO, tendo em vista o disposto na Portaria nº 553, de 8 de dezembro de, Planejamento e Infraestrutura em Ciência e Tecnologia e da Carreira de Desenvolvimento Tecnológico de que trata

  17. LA ENERGÍA EN LA FORMACIÓN DE LOS SUELOS: ASPECTOS TEÓRICOS Y METODOLÓGICOS PARA SU EVALUACIÓN

    Microsoft Academic Search

    AMÉRICO DEGIOANNI; ESTELA BRICCHI; EUGENIO HAMPP

    2008-01-01

    RESUMEN El suelo es un sistema abierto que tiende hacia un equilibrio dinámico acumulando y reciclando materia y energía a través del tiempo. Mediante un balance energético es posible evaluar la energía acumulada o la que circula a través de su masa. Esta miscelánea tiene por objetivo presentar aspectos teóricos y metodológicos para cuantificar la energía dinamizada durante la formación

  18. SISTEMA PARA GESTIONAR LA ACTIVIDAD CIENTÍFICA DEL DEPARTAMENTO DE INFORMÁTICA DE LA UNIVERSIDAD DE GUANTÁNAMO

    Microsoft Academic Search

    Denis Boizan Romero

    2012-01-01

    El sistema para gestionar la actividad científica del Departamento de Informática de la Universidad de Guantánamo surge debido a la necesidad de gestionar de manera más rápida, segura y eficaz los procesos que se desarrollan actualmente en dicho centro. Fue desarrollado utilizando los lenguajes PHP del lado del servidor con CodeIgniter como framework y JavaScript del lado del cliente. Se

  19. ALTERNATIVAS PARA A GERAÇÃO DE ENERGIA RENOVÁVEL NO BRASIL: A OPÇÃO PELA BIOMASSA

    Microsoft Academic Search

    Mariane Silva Marconato; Giuliana Aparecida Santini

    2008-01-01

    Durante muito tempo, os recursos fósseis e hídricos foram os grandes propulsores da civilização e da economia. O Brasil também se apoiou nessas fontes energéticas para o desenvolvimento de atividades industriais, agrícolas, de serviços e da própria sociedade. Entretanto, vive-se hoje uma crise no abastecimento energético, em função da problemática geopolítica, econômica e ambiental em torno da extração e comercialização

  20. Modelo para la reduccin del ciclo de desarrollo de software basado en CMM. Francisco J. ALVAREZ.

    E-print Network

    Weitzenfeld, Alfredo

    alto costo de implementación de modelos y la disminución de productividad en el período de aprendizaje: Calidad de Software, Procesos de desarrollo, CMM (Capability Maturity Model), KPA's (Key Process Areas desarrollo lograrían el estandarizar procesos e incrementar la calidad de los productos. Para adoptar el CMM

  1. PROCEDIMIENTO PARA EL DIAGNÓSTICO DE LA LOGÍSTICA INTERNA APLICADO EN UNA EMPRESA DE SERVICIOS EXTRAHOTELEROS

    Microsoft Academic Search

    Damaris Valdés Ferrer

    2012-01-01

    En este trabajo se presenta un procedimiento para realizar el diagnóstico de la logística interna, el cual fue aplicado en una empresa de servicios extrahoteleros. A partir de su aplicación se determinó un banco de problemas teniendo en cuenta las principales dificultades encontradas, así como un conjunto de acciones que le permitieron a la entidad mejorar los niveles de eficiencia

  2. PROCEDIMIENTO PARA LA PLANEACIÓN INTEGRAL DEL CAPITAL HUMANO EN ENTIDADES LOGÍSTICAS

    Microsoft Academic Search

    Daniel Machado Labrada; Margarita de Miguel Guzmán; Clara Marrero Fornaris

    2011-01-01

    Este trabajo tiene como objetivo proponer un procedimiento para la planeación integral del capital humano aplicado a Empresas Logísticas, en el mismo se tienen en cuenta los principales enfoques modernos sobre el tema, integra las actividades relacionadas con el capital humano, aborda la perspectiva cuantitativa y cualitativa, los diferentes plazos de tiempo: corto, mediano y largo, con un enfoque estratégico;

  3. Sistema informtico para gestionar la Garanta de Calidad de centros y titulaciones

    E-print Network

    Grimaldo, Francisco

    componentes de software libre Francisco Grimaldo, Jesús Santiago Aupi, Ricardo Ferrís, Vicente Cerverón desarrollo de un Sistema de Garantia Interna de Calidad (SGIC) para los centros y las titulaciones de laSQL. · Arquitectura web: J2EE, Spring, Hibernate, JavaMail... Figura 2. Proceso de orientación al estudiante en XPDL

  4. AOWE : una Metodolog¶‡a Orientada a Aspectos para Desarrollo de Aplicaciones Web

    Microsoft Academic Search

    Hernan Casalanguida; Juan Eduardo Duran

    Un enfoque para la separacion de intereses que ha cobrado cada vez mas importancia en la ¶ ultima decada es la orientacion a aspec- tos, debido a que permite evitar que un mismo interes este re?ejado en el dise~no en varios modulos o clases y que un mismo modulo o clase con- temple distintos intereses. Existe una carencia de metodos

  5. Desarrollo de Técnicas Ultrasónicas para Seguimiento y Interacción de la Marcha

    Microsoft Academic Search

    Anselmo Frizera; Rafael Raya; Juan C. Moreno; Ramón Ceres; Leopoldo Calderón

    En este trabajo se expone un sistema ultrasónico en desarrollo de captación y seguimiento de la marcha que es empleado como entrada a un sistema de control en el que eventualmente los patrones de movimientos y posiciones constituyen realmente un medio de comunicación ya sea de tipo general o bien para control natural de dispositivos de ayuda a la movilidad.

  6. Limnological variables and macrophyte infestation in Tucuruı´ reservoir - Para´ - Brazil

    Microsoft Academic Search

    PEREIRA FILHO; E. M. Lde. M. Novo

    2002-01-01

    This paper identified the relationship between aquatic macrophyte infestation and some limnological variables in Tucuruı´ reservoir, a hydroelectric power facility in Para´ State, northern Brazil. The spread of macrophyte stands jeopardizes environmental quality in many aspects since it is a natural habitat for the malaria vector; it is also an area of increased methane emission. On top of that, macrophyte

  7. International Collaboration and Capacity Building at the Federal University of Para, Brazil: the Geoscience Cyberinfrastructure Journey

    Microsoft Academic Search

    E. M. Cutrim; T. C. Yoksas; D. Nechet; J. Cohen

    2006-01-01

    For over three decades, the Federal University of Para (UFPA) has been committed to building faculty and student capacity through national and international collaboration. Since the early 1980s, the Meteorology Department has actively participated in a large number of international scientific experiments in the Amazon region. One difficulty in the continuation of research after the field phase was data sharing

  8. Intact cluster and chordate-like expression of ParaHox genes in a sea star

    PubMed Central

    2013-01-01

    Background The ParaHox genes are thought to be major players in patterning the gut of several bilaterian taxa. Though this is a fundamental role that these transcription factors play, their activities are not limited to the endoderm and extend to both ectodermal and mesodermal tissues. Three genes compose the ParaHox group: Gsx, Xlox and Cdx. In some taxa (mostly chordates but to some degree also in protostomes) the three genes are arranged into a genomic cluster, in a similar fashion to what has been shown for the better-known Hox genes. Sea urchins possess the full complement of ParaHox genes but they are all dispersed throughout the genome, an arrangement that, perhaps, represented the primitive condition for all echinoderms. In order to understand the evolutionary history of this group of genes we cloned and characterized all ParaHox genes, studied their expression patterns and identified their genomic loci in a member of an earlier branching group of echinoderms, the asteroid Patiria miniata. Results We identified the three ParaHox orthologs in the genome of P. miniata. While one of them, PmGsx is provided as maternal message, with no zygotic activation afterwards, the other two, PmLox and PmCdx are expressed during embryogenesis, within restricted domains of both endoderm and ectoderm. Screening of a Patiria bacterial artificial chromosome (BAC) library led to the identification of a clone containing the three genes. The transcriptional directions of PmGsx and PmLox are opposed to that of the PmCdx gene within the cluster. Conclusions The identification of P. miniata ParaHox genes has revealed the fact that these genes are clustered in the genome, in contrast to what has been reported for echinoids. Since the presence of an intact cluster, or at least a partial cluster, has been reported in chordates and polychaetes respectively, it becomes clear that within echinoderms, sea urchins have modified the original bilaterian arrangement. Moreover, the sea star ParaHox domains of expression show chordate-like features not found in the sea urchin, confirming that the dynamics of gene expression for the respective genes and their putative regulatory interactions have clearly changed over evolutionary time within the echinoid lineage. PMID:23803323

  9. La Importancia De Las Ayudas Informáticas Para Los Análisis Ergonómicos En El Diseño Industrial. Caso: la implementación de la silla sit-stand para las cajeras de supermercado en el estado de Quebec - Canadá

    Microsoft Academic Search

    Alvaro Enrique Diaz

    El diseño industrial está estrechamente relacionado con las necesidades de los diferentes utilizadores (clientes) y con el desarrollo de nuevos productos; en este proceso para llegar a los resultados esperados, el diseñador debe establecer las soluciones que deben satisfacer las necesidades encontradas. Para llegar a los objetivos, el producto debe ser pasado por diversas validaciones y verificaciones. Los análisis ergonómicos

  10. MECANISMOS PARA LA CREACIÓN DE HÉROES Y ANTI HÉROES PARA LA OPINIÓN PÚBLICA INTERNACIONAL EN PERIODOS DE GUERRA HOW MEDIA CREATES HEROS AND ANTIHEROS FOR THE INTERNATIONAL PUBLIC OPINION IN WAR PERIODS

    Microsoft Academic Search

    García Gordillo

    La intención principal de esta investigación es encontrar las claves que se utilizan a diario en los medios de comunicación para crear, de cara a la opinión pública, héroes y anti -héroes en periodos de crisis internacional como los que se vienen viendo desde el pasado 11 de septiembre. Para plantear esta investigación partimos de dos ideas. La primera de

  11. Ancient origins of axial patterning genes: Hox genes and ParaHox genes in the Cnidaria.

    PubMed

    Finnerty, J R; Martindale, M Q

    1999-01-01

    Among the bilaterally symmetrical, triploblastic animals (the Bilateria), a conserved set of developmental regulatory genes are known to function in patterning the anterior-posterior (AP) axis. This set includes the well-studied Hox cluster genes, and the recently described genes of the ParaHox cluster, which is believed to be the evolutionary sister of the Hox cluster (Brooke et al. 1998). The conserved role of these axial patterning genes in animals as diverse as frogs and flies is believed to reflect an underlying homology (i.e., all bilaterians derive from a common ancestor which possessed an AP axis and the developmental mechanisms responsible for patterning the axis). However, the origin and early evolution of Hox genes and ParaHox genes remain obscure. Repeated attempts have been made to reconstruct the early evolution of Hox genes by analyzing data from the triphoblastic animals, the Bilateria (Schubert et al. 1993; Zhang and Nei 1996). A more precise dating of Hox origins has been elusive due to a lack of sufficient information from outgroup taxa such as the phylum Cnidaria (corals, hydras, jellyfishes, and sea anemones). In combination with outgroup taxa, another potential source of information about Hox origins is outgroup genes (e.g., the genes of the ParaHox cluster). In this article, we present cDNA sequences of two Hox-like genes (anthox2 and anthox6) from the sea anemone, Nematostella vectensis. Phylogenetic analysis indicates that anthox2 (= Cnox2) is homologous to the GSX class of ParaHox genes, and anthox6 is homologous to the anterior class of Hox genes. Therefore, the origin of Hox genes and ParaHox genes occurred prior to the evolutionary split between the Cnidaria and the Bilateria and predated the evolution of the anterior-posterior axis of bilaterian animals. Our analysis also suggests that the central Hox class was invented in the bilaterian lineage, subsequent to their split from the Cnidaria. PMID:11324016

  12. LA TERAPIA FACILITADA POR ANIMALES DE COMPAÑÍA COMO PROGRAMA DE REHABILITACIÓN ADJUNTO PARA PERSONAS CON DIAGNÓSTICO DE ESQUIZOFRENIA CRÓNICA

    Microsoft Academic Search

    Victoria Villalta Gil; Susana Ochoa Güerre

    2007-01-01

    Coincidiendo con el surgimiento de la psiquiatría comunitaria, ha habido un progresivo proceso de desinstitucionalización de los pacientes psiquiátricos; seleccionando a los menos discapacitados para los recursos comunitarios y dejando los pacientes con más discapacidad al cuidado de las instituciones. La rehabilitación pretende afrontar la discapacidad para realizar actividades, con la finalidad de mejorar la desventaja social consecuencia del deterioro

  13. BUSCA LOCAL PARA POS-PROCESSAMENTO EM RESULTADOS DE OTIMIZAC~AO MULTI-OBJETIVO EM REDES DE FILAS

    E-print Network

    Cruz, Frederico

    BUSCA LOCAL PARA P´OS-PROCESSAMENTO EM RESULTADOS DE OTIMIZA¸C~AO MULTI-OBJETIVO EM REDES DE FILAS otimiza¸c~ao de redes de filas finitas, a capacidade total do sistema em ´areas de espera deve ser a menor algoritmo simulated annealing foi desenvolvido, especialmente para redes de filas finitas, produzindo solu

  14. Bacillus subtilis Soj (ParA): The involvement of DNA binding and dynamic localization in plasmid partitioning

    E-print Network

    Hester, Christina Marie

    2008-05-08

    The ParA family of ATPases encompasses proteins with a wide variety of functions. The prototype of this family is the ParA ATPase from the P1 prophage plasmid, which, along with ParB and the parS binding site, is required for the faithful...

  15. La UA dirige un programa para prevenir conductas adictivas en los ms jvenes a travs del deporte

    E-print Network

    Escolano, Francisco

    La UA dirige un programa para prevenir conductas adictivas en los más jóvenes a través del deporte la Diputación de Alicante, han puesto en marcha un programa para prevenir conductas adictivas y impacto y cambios de conducta en los jóvenes", explica Carreres. Juan M. Cortell, vicedecano de Ciencias

  16. Thouless theorem for one and two degrees of freedom (Teorema de Thouless para um e dois graus de liberdade)

    Microsoft Academic Search

    A. R. Bosco de Magalhaes; Avila Fonseca; M. C. Nemes

    Realizamos uma demonstracao acess´ ivel do teorema de Thouless para um ou dois graus de liberdade, usando somente mecanica quantica elementar. Este teoremae especialmenteutil para encontrar o vacuo relativo au m conjunto de operadores bosonicos transformados. Outra motivacaoe a existencia de experimentos envolvendo ´ ions capturados ou campos em eletrodinamica quantica de cavidades, usualmente modelados por osciladores harmonicos interagindo linearmente.

  17. TRIBUNAL REGIONAL FEDERAL DA 1 REGIO Edital de divulgao de Sesso Pblica para julgamento dos recursos interpostos da 1

    E-print Network

    Maier, Rudolf Richard

    TRIBUNAL REGIONAL FEDERAL DA 1ª REGIÃO Edital de divulgação de Sessão Pública para julgamento dos de Juiz Federal Substituto da 1ª Região O Presidente da Comissão do XIV Concurso Público para Provimento de Cargo de Juiz Federal Substituto da 1ª Região, no uso de suas atribuições, comunica que

  18. Characterization of the axon initial segment (AIS) of motor neurons and identification of a para-AIS

    E-print Network

    Paris-Sud XI, Université de

    Characterization of the axon initial segment (AIS) of motor neurons and identification of a para-AIS and a juxtapara-AIS, organized by protein 4.1B Duflocq et al. Duflocq et al. BMC Biology 2011, 9:66 http initial segment (AIS) of motor neurons and identification of a para-AIS and a juxtapara-AIS, organized

  19. EVALUATION OF PARA-DICHLOROBENZENE EMISSIONS FROM SOLID MOTH REPELLANT AS A SOURCE OF INDOOR AIR POLLUTION

    EPA Science Inventory

    Mothcakes made of para-dichlorobenzene have been widely available for the general population to be used as a moth repellant to protect garments from insect damage. Usually, a mothcake is expected to last for weeks or even months during which the para-dichlorobenzene emits slowly ...

  20. Diseño y desarrollo del subsistema de detección y reacción de una plataforma para la prevención de ataques coordinados

    Microsoft Academic Search

    Sergio Castillo; Joaquín García; Joan Borrell

    Resumen. Uno de los requisitos imprescindibles para el éxito en el comercio electrónico es el de proporcionar confianza y seguridad. A pesar del gran avance en este ámbito, tales como sistemas cortafuegos, mecanismos de autenticación y sistemas para la detección de intrusos, la mayoría de las infraestructuras que respaldan el comercio electrónico son actualmente vulnerables a sufrir un gran número

  1. Entornos Operativos para la Gestin de Recursos...Dept. d'Arquitectura de Computadors Execution Environments for

    E-print Network

    Corbalan, Julita

    Entornos Operativos para la Gestión de Recursos...Dept. d'Arquitectura de Computadors UPC Execution Environments for Parallel Applications Master CANS 2007/2008 Departament d'Arquitectura de Computadors Universitat Politècnica de Catalunya #12;Dept. d'Arquitectura de Computadors Entornos Operativos para la

  2. Lmite de prazas para o curso 2014-2015 Consello de Goberno da UDC 27 de marzo de 2014

    E-print Network

    Fraguela, Basilio B.

    Dirección de Empresas 180 180 Grao en Arquitectura 200 200 Grao en Arquitectura Técnica 190 160(1) Grao en Arquitectura Técnica 301 Simultaneidade de estudos dos Graos en CC. Empresariais e Turismo 30 30 DILIXENCIA e Arquitectura Técnica. Ofértanse 30 prazas para a simultaneidade e mantéñense 90 prazas para o grao

  3. Directrices de consenso en el campo de las microfinanzas: Definición de términos, coeficientes y ajustes financieros para las microfinanzas

    Microsoft Academic Search

    Damian von Stauffenberg; Frank Abate; Tillman Bruett; Isabelle Barres; Robert Peck Christen; Richard Rosenberg; Dana de Kanter; Tor Jansson; Barry Lennon; Alice Negre; Sanjay Singha

    2003-01-01

    El propósito de este documento es proponer una definición estándar para cada uno de los términos financieros seleccionados y plantear un método común de cálculo para determinados coeficientes financieros. Fue producido en colaboración entre el Banco Interamericano de Desarrollo (BID) y el Grupo Consultivo de Ayuda a la Población más Pobre (CGAP) del Banco Mundial, con los aportes de varias

  4. Método de Prueba GAED: Tiempo Óptimo para el Reemplazo de CAG en Plantas de Tratamiento de Agua Potable

    Microsoft Academic Search

    Por Henry Nowicki; H. George Nowicki; Wayne Schuliger; Barbara Sherman

    l carbón activado granular (CAG) no dura para siempre en una planta de tratamiento de agua (PTA), su rendimiento no necesita ser monitoreado periódicamente, y deberá ser reemplazado con CAG fresco, no usado o reactivado. El CAG usado, que se remueve, puede ser reactivado en plantas dedicadas a carbones de agua potable para ser retornado a la planta. Los reactivadores

  5. COMPARACIÓN DE VARIOS MÉTODOS PARA LA REPRESENTACIÓN CARTOGRÁFICA DE INFORMACIÓN CLIMÁTICA EN ZONAS ALTAS DEL ESTADO LARA

    Microsoft Academic Search

    Jorge López Márquez; Rigoberto Andressen

    2001-01-01

    Se compararon tres métodos cartográficos diferentes para la representación de aspectos climáticos (temperatura y precipitación) en zonas altas del estado Lara. Se usó conjuntamente A) Representación analógica (en papel), B) Mapas digitalizados de coberturas mediante el software para Sistema de Información Geográfica (SIG) ArcInfo y C) Modelos numéricos interpolados mediante software de aplicación geoestadística (SURFER), empleando el modelo de interpolación

  6. STRATIFIED\\/PCA: UN MÉTODO DE PROCESAMIENTO DE DATOS Y VARIABLES PARA LA CONSTRUCCIÓN DE MODELOS DE REDES NEURONALES

    Microsoft Academic Search

    Resumen. Este artículo describe un método para reducir observaciones y variables contenidas en grandes archivos de datos a nuevos conjuntos de datos cuyo tamaño es mucho más reducido. Estos nuevos conjuntos son confiables para mejorar tanto en calidad como en tiempo, la construcción de los modelos de redes neuronales. El método, Stratified\\/PCA utiliza la técnica de muestreo estratificado y análisis

  7. O recurso a veculos areos tripulados remotamente para realizar vrias tarefas, da investigao cientfica ao controlo de fronteiras,

    E-print Network

    Instituto de Sistemas e Robotica

    TECNOLOGIA DRONES PARA TODO O SERVI�O O recurso a veículos aéreos tripulados remotamente para privacidade aumentam TEXTOS DE ALEXANDRA SIM�ES DE ABREU FOTOGRAFIAS DE NUNO BOTELHO UAV, VANT, RPA, drones falar mais dos drones (zangões em portu- guês), nomeadamente com fins mi- litares -- podem realizar

  8. Comienza la construcción de instalación patrocinada por el NCI en Puerto Rico para realizar estudios clínicos sobre el cáncer

    Cancer.gov

    El gobierno de Puerto Rico ha destinado $196 millones de dólares para construir un hospital oncológico de 287 000 pies cuadrados en San Juan, que contará con 96 camas. El nuevo hospital es el primero en su clase en la región caribeña y en él se llevarán a cabo tratamientos para el cáncer y estudios clínicos.

  9. Instrumentos para la conservacin de la Diversidad Biolgica y los HbitatsDiversidad Biolgica y los Hbitats

    E-print Network

    Rodríguez, Miguel Ángel

    Instrumentos para la conservación de la Diversidad Biológica y los HábitatsDiversidad Biológica y. 5 de Biología. 2011-12 Jesús Ángel Cuevas MorenoJesús Ángel Cuevas Moreno #12;Instrumentos para la. Principales impulsores de la pérdida de Diversidad Biológica y los hábitats Instrumentos de conservación

  10. Zoneamento agrícola e época de semeadura para trigo no Brasil Agricultural zoning and sowing dates for wheat in Brazil

    Microsoft Academic Search

    Gilberto Rocca da Cunha; João Carlos Haas; Jaime Ricardo; Tavares Maluf; Paulo Henrique Caramori; Eduardo Delgado Assad; Hugo José Braga; Jurandir Zullo Jr; Cláudio Lazzarotto; Sérgio Gonçalves; Marcos Wrege; Dionísio Brunetta; Sérgio Roberto Dotto; Hilton Silveira Pinto; Orivaldo Brunini; Vera Magali; Radtke Thomé; Sérgio Luiz Zampieri; Aldemir Pasinato; Márcia Barrocas Moreira Pimentel; Cristina Pandolfo

    2001-01-01

    Resumo - Um Programa de Zoneamento Agrícola para o Brasil, subsidiando a política de crédito e securidade rural, começou a ser posto em prática pelo Ministério da Agricultura, Pecuária e Abastecimento (MAPA) a partir da safra de inverno de 1996, com a cultura de trigo no sul do Brasil. Este artigo apresenta uma síntese dos trabalhos sobre zoneamento agrícola para

  11. Ambulacrarian prototypical Hox and ParaHox gene complements of the indirect-developing hemichordate Balanoglossus simodensis.

    PubMed

    Ikuta, Tetsuro; Miyamoto, Norio; Saito, Yasunori; Wada, Hiroshi; Satoh, Nori; Saiga, Hidetoshi

    2009-07-01

    The Hox genes and its evolutionary sister, the ParaHox genes, are widely distributed among animals. Although it has been expected that hemichordates and echinoderms have a single set of Hox genes and most likely a single set of ParaHox genes, it is not known whether the ortholog of Hox8 is absent in hemichordates, and in turn, consensus view about Hox/ParaHox gene complements in hemichordates has not been established. In this study, we isolated either complete or nearly complete coding sequences of 12 Hox genes, including the ortholog of the Hox8 that has not been reported in the previous studies, and three ParaHox genes from the recently discovered indirect-developing acorn worm, Balanoglossus simodensis. Our data suggest that the ancestral hemichordate had intact complements of ambulacrarian prototypical Hox and ParaHox genes, consisting of 12 and three members, respectively. PMID:19669790

  12. Saturn’s Tropospheric Temperatures and Para-Hydrogen Distribution from Ten Years of Cassini Observations

    NASA Astrophysics Data System (ADS)

    Fletcher, Leigh N.; Irwin, Patrick G.; Sinclair, James; Giles, Rohini; Barstow, Joanna; Achterberg, Richard K.; Orton, Glenn S.

    2014-11-01

    Cassini/CIRS observations of Saturn’s 10-1400 cm-1 spectrum have been inverted to construct a global record of tropospheric temperature and para-hydrogen variability over the ten-year span of the Cassini mission. The data record the slow reversal of seasonal asymmetries in tropospheric conditions from northern winter (2004, Ls=293), through northern spring equinox (2009, Ls=0) to the present day (2014, Ls=60). Mid-latitude tropospheric temperatures have cooled by approximately 4-6 K in the south and warmed by 2-4 K in the north, with the seasonal contrast decreasing with depth. CIRS detected the north polar minimum 100-mbar temperatures 6-8 years after winter solstice, whereas the south polar maximum occurred 1-2 years after summer solstice, consistent with the lag times predicted by radiative equilibrium models. Warm polar cyclones and the northern hexagon persist throughout the mission, suggesting that they are permanent features of Saturn’s tropospheric circulation. The 200-mbar thermal enhancement (“knee”) that was strongest in the summer but weak or absent in winter in 2004-2006 (Fletcher et al., 2007, Icarus 189, p.457-478) has now shifted northward and is present globally in 2014, suggestive of radiative heating in Saturn’s tropospheric haze layer. Saturn’s para-H2 fraction, which serves as a tracer of both tropospheric mixing and the efficiency of re-equilibration between the ortho- and para-hydrogen states, is slowly altering: super-equilibrium conditions (para-H2 fraction exceeding equilibrium expectations and suggestive of subsiding airmasses) that dominated the southern summer hemisphere are now weakening, whereas the sub-equilibrium conditions (suggestive of uplift) of the northern winter are being replaced by equilibrium or super-equilibrium conditions in spring. The thermal ‘knee’ and the para-H2 distribution are tracking both the increased spring illumination and the increasing tropospheric haze opacity of the springtime hemisphere observed via colour changes in visible light, suggesting a close connection between the tropospheric temperatures, para-H2 and haze characteristics.

  13. A nanoparticle catalyst for heterogeneous phase para-hydrogen-induced polarization in water.

    PubMed

    Glöggler, Stefan; Grunfeld, Alexander M; Ertas, Yavuz N; McCormick, Jeffrey; Wagner, Shawn; Schleker, P Philipp M; Bouchard, Louis-S

    2015-02-16

    Para-hydrogen-induced polarization (PHIP) is a technique capable of producing spin polarization at a magnitude far greater than state-of-the-art magnets. A significant application of PHIP is to generate contrast agents for biomedical imaging. Clinically viable and effective contrast agents not only require high levels of polarization but heterogeneous catalysts that can be used in water to eliminate the toxicity impact. Herein, we demonstrate the use of Pt?nanoparticles capped with glutathione to induce heterogeneous PHIP in water. The ligand-inhibited surface diffusion on the nanoparticles resulted in a (1) H?polarization of P=0.25?% for hydroxyethyl propionate, a known contrast agent for magnetic resonance angiography. Transferring the (1) H?polarization to a (13) C?nucleus using a para-hydrogen polarizer yielded a polarization of 0.013?%. The nuclear-spin polarizations achieved in these experiments are the first reported to date involving heterogeneous reactions in water. PMID:25565403

  14. Renormalization-group approach for para-hydrogen adsorbed on exfoliated graphite

    NASA Astrophysics Data System (ADS)

    Mello, E. V. L.; Carneiro, G. M.

    1986-04-01

    Heat-capacity measurements of para-hydrogen adsorbed on graphite were performed recently and revealed an interesting phase diagram similar to 4He. We report a renormalization-group study based on a three-state Potts model with vacancies which approximates the experimental situation. The resulting global phase diagram is in a three parameter space of pair-interaction constants and chemical potential as studied by Berker, Ostlund and Putnam. The Lennard-Jones or other effective potential between the para-H 2 adsorbed molecules determines the subspace relevant to this adsorbate. A method to calculate thermodynamic densities is discussed and the resulting temperature versus density diagram agrees well with the experiment.

  15. High dose para-aortic lymph node irradiation for gynecologic cancer: technique, toxicity, and results

    SciTech Connect

    Russell, A.H.; Jones, D.C.; Russell, K.J.; Gerdes, A.J.; Figge, D.C.; Greer, B.E.; Tamimi, H.K.; Cain, J.M.

    1987-02-01

    A technique for high dose (5600-6100 cGy) extended field irradiation to the para-aortic lymph nodes is described. Fourteen patients have been treated with this technique, of whom 10 have had histologic confirmation of para-aortic node metastases. With follow-up ranging from 11 to 78 months, 7 of 14 patients are alive and clinically cancer-free. Acute effects of extended field treatment on patient weight and circulating blood counts are analyzed, and late treatment morbidity assessed. The findings suggest that such treatment, executed with modern equipment and appropriate technique, is not significantly more hazardous than pelvic irradiation, and can result in a substantial probability of disease-free survival.

  16. Incentivos para atraer y retener personal de salud de zonas rurales del Perú: un estudio cualitativo

    PubMed Central

    Huicho, Luis; Canseco, Francisco Díez; Lema, Claudia; Miranda, J. Jaime; Lescano, Andrés G.

    2014-01-01

    El objetivo fue identificar incentivos de atracción y retención en zonas rurales y distantes de Ayacucho, Perú. Fueron realizadas entrevistas en profundidad con 80 médicos, enfermeras, obstetras y técnicos (20 por grupo) de las zonas más pobres y con 11 funcionarios. No existen políticas sistemáticas de atracción y retención de personal de salud en Ayacucho. Los principales incentivos, en orden de importancia, fueron mejoras salariales, oportunidades de formación y capacitación, estabilidad laboral y nombramiento, mejoras en infraestructura y equipos, e incremento del personal. Se mencionaron también mejoras en la vivienda y alimentación, mayor cercanía con la familia y reconocimiento por el sistema de salud. Existen coincidencias y singularidades entre los distintos grupos sobre los incentivos clave para estimular el trabajo rural, que deben considerarse al diseñar políticas públicas. Las iniciativas del Estado deben comprender procesos rigurosos de monitoreo y evaluación, para asegurar que las mismas tengan el impacto deseado. PMID:22488318

  17. H2CS abundances and ortho-to-para ratios in interstellar clouds

    NASA Technical Reports Server (NTRS)

    Minh, Y. C.; Irvine, W. M.; Brewer, M. K.

    1991-01-01

    Several H2CS ortho and para transitions have been observed toward interstellar molecular clouds, including cold, dark clouds and star-forming regions. H2CS fractional abundances f(H2CS) about 1-2 10 to the -9th relative to molecular hydrogen toward TMC-1, Orion A, and NGC 7538, and about 5 10 to the -10th for L134N are derived. The H2CS ortho-to-para ratios in TMC-1 are about 1.8 toward the cyanopolyyne peak and the ammonia peak, which may indicate the thermalization of H2CS on 10 K grains. A ratio of about 3, the statistical value, for Orion (3N, 1E) and NGC 7538 is derived, while a value of about 2 for Orion (KL) is found.

  18. Molecular Characterization of Neurally Expressing Genes in the Para Sodium Channel Gene Cluster of Drosophila

    PubMed Central

    Hong, C. S.; Ganetzky, B.

    1996-01-01

    To elucidate the mechanisms regulating expression of para, which encodes the major class of sodium channels in the Drosophila nervous system, we have tried to locate upstream cis-acting regulatory elements by mapping the transcriptional start site and analyzing the region immediately upstream of para in region 14D of the polytene chromosomes. From these studies, we have discovered that the region contains a cluster of neurally expressing genes. Here we report the molecular characterization of the genomic organization of the 14D region and the genes within this region, which are: calnexin (Cnx), actin related protein 14D (Arp14D), calcineurin A 14D (CnnA14D), and chromosome associated protein (Cap). The tight clustering of these genes, their neuronal expression patterns, and their potential functions related to expression, modulation, or regulation of sodium channels raise the possibility that these genes represent a functionally related group sharing some coordinate regulatory mechanism. PMID:8849894

  19. Development of an integrated remote monitoring technique and its application to para-stressing bridge system

    NASA Astrophysics Data System (ADS)

    Miyamoto, Ayaho; Motoshita, Minoru; Casas, Joan R.

    2013-12-01

    Bridge monitoring system via information technology is capable of providing more accurate knowledge of bridge performance characteristics than traditional strategies. This paper describes not only an integrated Internet monitoring system that consists of a stand-alone monitoring system (SMS) and a Web-based Internet monitoring system (IMS) for bridge maintenance but also its application to para-stressing bridge system as an intelligent structure. IMS, as a Web-based system, is capable of addressing the remote monitoring by introducing measuring information derived from SMS into the system through Internet or intranet connected by either PHS or LAN. Moreover, the key functions of IMS such as data management system, condition assessment, and decision making with the proposed system are also introduced in this paper. Another goal of this study is to establish the framework of a para-stressing bridge system which is an intelligent bridge by integrating the bridge monitoring information into the system to control the bridge performance automatically.

  20. EL PROGRAMA CITI: UNA ALTERNATIVA PARA LA CAPACITACIÓN EN ÉTICA DE LA INVESTIGACIÓN EN AMÉRICA LATINA

    PubMed Central

    Litewka, Sergio; Goodman, Kenneth; Braunschweiger, y Paul

    2011-01-01

    El Programa CITI (Collaborative Institutional Training Initiative) es un curso basado en Internet y desarrollado por voluntarios, que brinda material educacional sobre protección de sujetos humanos en investigaciones biomédicas y de conducta, buenas prácticas clínicas, conducta responsable de la investigación y trato humanitario a animales de laboratorio. Es un esfuerzo conjunto del Fred Hutchinson Cancer Research Center y la Universidad de Miami. Con la colaboración de expertos locales, gran parte del contenido se ha adaptado para América Latina, se ha traducido al español y portugués y se han establecido acuerdos de colaboración con instituciones especializadas en bioética en Chile, Brasil, Costa Rica y Perú. Los autores presentan una metodología accesible para la capacitación en ética de la investigación y una justificación de su uso y difusión en América Latina PMID:21687817

  1. Desarrollo de un receptor polarimétrico en banda S para aplicación en estudios radioastronómicos

    NASA Astrophysics Data System (ADS)

    Barberis, C. M.; Bava, J. A.; Sanz, A. J.

    Desde el punto de vista tecnológico, el objetivo principal de este proyecto es desarrollar un cabezal de receptor en la frecuencia de 3.3 GHz, con una temperatura del sistema de 60 K y un ancho de banda de 140 MHz. El mismo será instalado en el foco primario de un reflector parabólico de 30 metros de diámetro que funcionará como radiómetro en el IAR. El receptor es del tipo polarimétrico, con lo cual permite la posibilidad de obtener las componentes de polarización lineal y circular. Para tal fin el cabezal constará de dos ramas receptoras que amplificarán la señal y la trasladarán a una frecuencia menor, (frecuencia intermedia), permitiendo de esa forma un mejor transporte de la señal a la sala de control para su posterior procesamiento. El receptor, además de tener características polarimétricas, podrá ser usado en el contínuo y en la línea, utilizando las ventajas observacionales y de procesamiento de señal que actualmente posee el IAR.

  2. Modelizacion, control e implementacion de un procesador energetico paralelo para aplicacion en sistemas multisalida

    NASA Astrophysics Data System (ADS)

    Ferreres Sabater, Agustin

    Cualquier sistema electronico que incluya un procesado o tratamiento de la senal, y ademas, algun tipo de actuador mecanico generalmente necesita, como minimo, dos tensiones diferentes de alimentacion. Excluyendo los sistemas de alimentacion distribuida, la solucion tecnica mas utilizada para proporcionar dos o mas tensiones consiste en las fuentes de alimentacion multisalida. En una fuente de alimentacion multisalida los diferentes circuitos que conforman cada salida comparten un mismo transformador de potencia optimizando coste, masa, y volumen. Las ventajas obtenidas con este procedimiento tienen en su contra el efecto que sobre cada salida individual provocan las demas en su conjunto debido, principalmente, a los efectos de los elementos parasitos de los componentes. Un cambio de carga en una de las salidas produce un transitorio que es visto por todas las demas como un efecto de impedancia cruzada, y al final del transitorio, la tension de cada salida es diferente respecto a la que tenian antes del transitorio. Este ultimo resultado se conoce como regulacion cruzada. La disminucion de los efectos de la regulacion cruzada ha sido objeto de estudio durante los ultimos anos. El objetivo ha sido el desarrollo de distintas estrategias que permiten, desde disminuir los efectos de la regulacion cruzada hasta los niveles deseables, a eliminarla completamente. El resultado final suele suponer una penalizacion sobre el diseno del sistema directamente proporcional al grado de regulacion a conseguir en las distintas salidas. Entre las soluciones propuestas para eliminar la regulacion cruzada las tecnicas de post-regulacion se han consolidado como la opcion mas aceptada ya que, pueden aplicarse a cualquier convertidor y no suponen ninguna complejidad adicional a la hora de plantear el diseno. En esta Tesis Doctoral se abordara el estudio de la tecnica conocida como postregulacion mediante transformador controlado, que si bien se ha empleado en convertidores resonantes, su modelizacion, y aplicacion en convertidores PWM, esta aun por estudiar y valorar. El primer Capitulo consiste en una breve introduccion al problema de la regulacion cruzada y la impedancia cruzada para posteriormente describir las tecnicas de post-regulacion actualmente mas empleadas, con especial atencion al post-regulador con transformador controlado. El Capitulo segundo trata del estudio de las caracteristicas estaticas del postregulador con transformador controlado. Partiendo de los estudios disponibles sobre el postregulador se plantean mejoras en su modo de actuacion y se discuten tres alternativas diferentes para controlar el transformador. Las dos primeras consisten en emplear un convertidor auxiliar Boost en sus dos modos de funcionamiento, continuo y discontinuo. La tercera consiste en controlar el transformador con una tension PWM directamente, sin filtrado. Finalmente se comprueba experimentalmente, para el estado estacionario, el funcionamiento del post-regulador para cada uno de los tres metodos de control. El Capitulo tercero trata de la dinamica de la salida controlada con el post-regulador cuando este emplea un convertidor auxiliar tipo Boost. Mediante la tecnica de promediado de variables de estado se propone el modelo de pequena senal, tanto para el modo continuo como para el modo discontinuo de funcionamiento del convertidor auxiliar. Los resultados mas significativos de esta seccion son las expresiones analiticas de las impedancias cruzadas y de la impedancia de la salida post-regulada. Como complemento al modelo de pequena senal se plantea un modelo de gran senal implementado sobre el simulador Pspice. Con este nuevo modelo se reproducen los resultados obtenidos con el modelo de pequena senal y ademas es posible simular los transitorios en las tensiones de salida ante cambios de carga. La modelizacion del convertidor cuando el transformador se controla con una tension PWM sin filtrar es el objetivo del Capitulo 4. En las secciones siguientes del Capitulo se plantea el correspondiente modelo de gran senal aplicado a un nuevo prototipo exper

  3. Kinetic energy of solid and liquid para-hydrogen: a path integral Monte Carlo simulation

    NASA Astrophysics Data System (ADS)

    Zoppi, Marco; Neumann, Martin

    1992-06-01

    The translational (center of mass) kinetic energy of solid and liquid para-hydrogen have been recently measured by means of Deep Inelastic Neutron Scattering. We have evaluated the same quantity, in similar thermodynamic conditions, by means of Path Integral Monte Carlo computer simulation, modelling the system as composed of a set of spherical molecules interacting through a pairwise additive Lennard-Jones potential. In spite of the crude approximations on the interaction potential, the agreement is excellent. The pressure was also computed by means of the same simulations. This quantity, compared with the equation of state for solid para-hydrogen given by Driessen and Silvera, gives an agreement of a lesser quality and a negative value for the liquid state. We attribute this discrepancy to the limitations of the Lennard-Jones potential.

  4. Improvement of some pharmaceutical properties of mycophenolate mofetil (MMF) by para sulphonatocalix[4]resorcinarene inclusion complex

    Microsoft Academic Search

    Shobhana K. Menon; Nishith R. Modi; Bhoomika Mistry; Kuldeep Joshi

    2011-01-01

    As a part of our investigations to unfold the chemistry of calixresorcinarene, we have focused on the formation of inclusion\\u000a complex of a poorly soluble (43 ?g ml?1 at pH 7) drug mycophenolate mofetil (MMF) an immunosuppressive agent and an inosine monophosphate dehydrogenase (IMPDH) inhibitor\\u000a with para sulphonatocalix[4]resorcinarene (PSC4R). The complete complexation of the drug was achieved after 48 h of stirring\\u000a with

  5. Programao 1 Encontro para Estudos em Polticas e Prticas de Educao Ambiental

    E-print Network

    Souza, Max O.

    Programação 1º Encontro para Estudos em Políticas e Práticas de Educação Ambiental 14:00 às 14:20 - A unidade curricular Políticas de Educação Ambiental no contexto da proposta interdisciplinar do Projeto Pedagógico do Curso de Bacharelado em Ciência Ambiental do Instituto de Geociências - Profa. Patricia Almeida

  6. NMR Imaging of Catalytic Hydrogenation in Microreactors with the Use of paraHydrogen

    Microsoft Academic Search

    Louis-S. Bouchard; Scott R. Burt; M. Sabieh Anwar; Kirill V. Kovtunov; Igor V. Koptyug; Alexander Pines

    2008-01-01

    Catalysis is vital to industrial chemistry, and the optimization of catalytic reactors attracts considerable resources. It has proven challenging to correlate the active regions in heterogeneous catalyst beds with morphology and to monitor multistep reactions within the bed. We demonstrate techniques, using magnetic resonance imaging and para-hydrogen (p-H2) polarization, that allow direct visualization of gas-phase flow and the density of

  7. Injection Molding Poly(Para-phenylene) with a Rapidly Heated Mold

    Microsoft Academic Search

    Thomas E. Kimerling; Donggang Yao; Byung H. Kim

    2009-01-01

    Poly(para-phenylene), a self-reinforced rigid-chain polymer, has superb mechanical properties. Its use as a thermoplastic polymer in injection molding, however, is prohibited because of its extremely high viscosity. In this study, an injection molding process with a rapidly heated mold was used to enhance the moldability. The mold can be heated from room temperature to 250°C in 5 s and thermally cycled

  8. Projeto do sistema anti-ressonante da fiação dos transdutores para o detector Mario Schenberg

    NASA Astrophysics Data System (ADS)

    Vieira, S. J.., Jr.; Melo, J. L.

    2003-08-01

    O detector de ondas gravitacionais Mario Schenberg está sendo projetado e construído pelo grupo Gráviton. Sua construção está ocorrendo no Laboratório de Estado Sólido e Baixas Temperaturas (LESBT) da Universidade de São Paulo, na cidade de São Paulo. Esse detector possui uma massa ressonante esférica de cobre-alumínio, com 65 cm de diâmetro, pesando aproximadamente 1150 Kg, suspensa por um sistema de isolamento vibracional, que se encontra em fase de testes preliminares. A real eficácia desse sistema, entretanto, só poderá ser comprovada quando o detector estiver aparelhado com, pelo menos, um transdutor eletromecânico de altíssima sensibilidade acoplado à massa ressonante. Neste momento, não só este sistema de isolamento vibracional será posto em teste, como o do projeto da fiação que transporta os sinais de microondas até os transdutores e destes para a pré-amplificação. Apesar dessa fiação ter sido projetada para não apresentar nenhum contato com a superfície esférica da antena, de maneira a não haver nenhuma transmissão de ruído vibracional do laboratório para esta, deve-se minimizar o ruído microfônico produzido nessa fiação por oscilações mecânicas, uma vez que ela não utiliza nenhum sistema de isolamento vibracional. Com o intuito de resolver este problema, projetamos uma estrutura, formada por pequenos cilindros conectados por barras, a qual não terá nenhuma ressonância mecânica na faixa de freqüências de interesse para detecção (3000 - 3400 Hz). Desta forma, as vibrações nessa faixa não serão amplificadas. O projeto foi feito usando iterativamente, de maneira a otimizar os resultados obtidos, o programa de elementos finitos Msc/Nastran. Através de simulações feitas neste programa, determinamos os parâmetros geométricos ideais a serem utilizados, os quais proporcionam a maior região espectral de interesse livre de ressonâncias.

  9. Modelos auxiliares para problemas de programacion lineal con coeficientes imprecisos en las restricciones

    Microsoft Academic Search

    L. Campos; J. L. Verdegay

    1989-01-01

    Resumen  En este artículo se considera un problema de Programación Lineal en el que los coeficientes del sistema de inecuaciones lineales,\\u000a que definen el conjunto de restricciones, están dados de forma imprecisa o vaga. Se supone entonces que tales coeficientes\\u000a pueden ser definidos mediante números difusos. Se propone un enfoque de resolución basado en las distintas versiones existentes\\u000a para la comparación

  10. Un Marco No-Monotonico para Representar Intenciones Bajo un Modelo BDI

    E-print Network

    Guerra Hernández, Alejandro

    - vas, est´an ´intimamente relacionadas con las creencias y los planes, al tiempo que proveen elementos posibilidades l´ogicas leg´itimas. As´i, resulta ilustrativo notar que aunque el cambio de creencias sobre la,8,12,16], llevando a teor´ias de revisi´on de creencias y l´ogicas no-monot´onicas para creencias, los #12;2 procesos

  11. Calendrio escolar para o ano lectivo 2006/2007 1 SEMESTRE

    E-print Network

    Ribeiro,Isabel

    de Curso) Período de Aulas do 1º Ano: Segunda-feira, dia 25 de Setembro de 2006, a Sexta-feira, dia, a Quinta-feira, dia 14 de Setembro de 2006 �poca Especial de Exames referente ao ano de 2006/2007 SegundaCalendário escolar para o ano lectivo 2006/2007 1º SEMESTRE Período de Aulas (excepto 1ºano

  12. SAGISc: Sistema Colaborativo para Recolha de Dados Paula Andr Pedro Antunes

    E-print Network

    Antunes, Pedro

    , etc. A segunda etapa processa-se no campo, onde se efectua o levantamento da geologia da área. Este deslocações ao local de estudo. � de salientar que actualmente este processo pode demorar alguns anos. Este verificar as situações de dúvida ou para dar uma segunda opinião sobre determinado elemento geológico. O

  13. Lanzamiento del estudio de tratamiento personalizado para el cáncer de seno

    Cancer.gov

    Hoy se inició el Estudio de Asignación de Opciones Individualizadas de Tratamiento (Trial Assigning IndividuaLized Options for Treatment (Rx), o TAILORx, el cual evaluará si los genes que están frecuentemente asociados con el riesgo de recurrencia entre las mujeres con cáncer de seno en etapa inicial pueden ser utilizados para asignar a las pacientes el tratamiento más adecuado y efectivo. Preguntas y respuestas

  14. Aplicando Metodos de Aprendizaje Sensible al Coste para Mejorar Problemas de Big Data

    E-print Network

    Granada, Universidad de

    ´ecnicas de miner´ia de datos no est´an bien preparadas para afrontar los requerim- ientos de tiempo y espacio datos y las tecnolog´ias de miner´ia de datos han quedado desbordados por no poder hacer frente a dichas,vlopez,j.m.benitez,herrera}@decsai.ugr.es Abstract. Debido a la explosi´on y proliferaci´on de datos en los ´ultimos a~nos, surge la necesidad de

  15. Propuesta de Diseño para la Gestión Colaborativa del Conocimiento Mediante Información Semántica

    Microsoft Academic Search

    Jaime Moreno Llorena; Xavier Alamán Roldán; Ruth Cobos Pérez

    ABSTRACT Uno,de los ,efectos indeseables ,de la ,introducción de las tecnologías de la información y las comunicaciones, Internet y la Web ha sido ,la sobrecarga ,de información. Se están buscando soluciones,a este ,problema ,desde ,distintos campos ,de investigación, Gestión del Conocimiento, Minería de Información, Web Semántica, etc. Una hipótesis interesante para buscar soluciones a este problema,en el ámbito de los

  16. Solvatochromism and preferential solvation of para -derivatives of guaiacol in water-N,N-dimethylformamide mixtures

    Microsoft Academic Search

    D. S. Kosyakov; N. S. Gorbova; K. G. Bogolitsyn; L. V. Gusakov

    2007-01-01

    The influence of the composition of the water-N,N-dimethylformamide mixed solvent on the position of the B absorption band\\u000a in UV spectra of 2-methoxyphenol, its para-substituted derivatives, and corresponding phenolate anions simulating base units of natural lignin is investigated. The\\u000a data obtained are interpreted in terms of the model of preferential solvation. The preferential solvation parameters and compositions\\u000a of the solvation

  17. Exito para el XVI Festival Internacional de Teatro Hispano del Teatro Avante

    E-print Network

    Marrero, Marí a Teresa

    2002-04-01

    Nueva York del 20 al 30 de junio 2001 en el New 42nd Street Studios logró traer maravillosos representantes del teatro latinoamericano y español contemporáneo. En Miami el programa incluyó: Cenizas sobre el mar (Colombia/Miami), La ciudad sitiada...) y Melodrama (Brasil). Y hubo tres obras de teatrodanza: Jacinta-todas las plegarias (Ecuador/EEUU), Seque volverás (Colombia) y Materia (Brasil). Por último el Teatro Taller de Colombia presentó Los cíngaros, obra para espacios abiertos públicos...

  18. ltima Hora Seminario Orientacin para Mayores de 25 Aos NOTICIAS Y EVENTOS

    E-print Network

    Escolano, Francisco

    Alumnos/as para las sesiones del 14 al 28 de marzo (Publicada 10/03/2014) Importante: El aula común de la Primer Apellido y Aula del Aulario II de 16 a 19 horas: Aula Desde Hasta C02 A L C03 M Z 19.30 - 21.00 : Los alumnos que deseen asistir a la clase sobre el manejo del Campus Virtual deberán acudir a las

  19. Mitotic Haploidization by Treatment of Aspergillus niger Diploids with para-Fluorophenylalanine

    Microsoft Academic Search

    Pol Lhoas

    1961-01-01

    IN genetic analysis based on mitotic segregation1-4 an important step is the recovery of haploid segregants from heterozygous diploids. This has been done until recently by laborious or complicated techniques4,5. I am indebted to Dr. G. Morpurgo, of the Istituto Superiore di Sanità, Rome, for informing me and permitting me to make use of his discovery that treatment with para-fluoro-phenylalanine

  20. Natural bond orbital (NBO) population analysis of para-substituted S-Nitroso-thiophenols

    Microsoft Academic Search

    Li Xiao-Hong; Tang Zheng-Xin; Zhang Xian-Zhou

    2009-01-01

    Theoretical study of several para-substituted S-Nitroso-thiophenols has been performed using quantum computational ab initio RHF and density functional B3LYP and B3PW91 methods with 6-31G(d,p) basis set. Geometries obtained from DFT calculations were used to perform NBO analysis. It is noted that the weakness in the SN sigma bond is due to nO1??S3N2? delocalisation and is responsible for the longer SN

  1. An Unusual Case of Bilateral Maxillary and Mandibular Para Premolar: A Case Report

    PubMed Central

    Chanagay, Sunil Kumar Vishwanath; Singh, Vikram; Bantwal, Sunil Rao; Muniyappa, Manjunatha

    2013-01-01

    The presence of supernumerary teeth is not uncommon in the general population. They occur more frequently in patients with a family history of such teeth. It is rare to find multiple supernumeraries in individuals with no other associated disease or syndrome. There have been very few documented cases of bilateral maxillary and mandibular supernumeraries in the premolar region. An unusual case of a 35-year-old man with six para premolars and complete dentition is presented. PMID:24396358

  2. ACADEMIA DE POLCIA CIVIL CONCURSO PBLICO PARA PROVIMENTO DE VAGAS E FORMAO DE CADASTRO DE RESERVA

    E-print Network

    Maier, Rudolf Richard

    ACADEMIA DE POLÍCIA CIVIL CONCURSO P�BLICO PARA PROVIMENTO DE VAGAS E FORMA��O DE CADASTRO DE ACADEMIA DE POLÍCIA CIVIL DO DISTRITO FEDERAL (APCDF), no uso de suas atribuições legais, torna pública inalterados os demais itens e subitens do referido edital. SANDRA GOMES MELO Diretora da Academia de Polícia

  3. Oficinas aprovadas OF1 Ensino de portugus como segunda lngua: uma abordagem bilngue para surdos

    E-print Network

    (HQ's): análise de livros didáticos de ensino de Espanhol/LE Carolina Parrini Ferreira e Camila no ensino de E/LE; ii) analisar o uso do gênero HQ em livros didáticos para o ensino de E/LE; iii) propor tem o potencial de dar vida ao livro didático, através da criação de personagens e contações. Propomos

  4. Contribuição dos fatores de risco psicossociais para o transtorno de déficit de atenção\\/hiperatividade

    Microsoft Academic Search

    Marcio M. Vasconcelos; Ana Flávia de A. Malheiros; Jairo Werner Jr.; Adriana R. Brito; Jane Bardawil Barbosa; Ítalo S. Oliveira Santos; Daniel Fampa N. Lima

    2005-01-01

    RESUMO - Objetivo: Analisar a contribuição dos fatores psicossociais para a ocorrência do transtorno de déficit de atenção\\/hiperatividade (TDAH).M é t o d o:Este é um estudo retrospectivo de casos-controles que analisou 403 alunos de uma escola pública primária. Preencheram-se o questionário de sintomas do DSM- IV e um questionário psicossocial específico e realizaram-se anamnese e exames físico e neurológico

  5. Stable self-trapping and ring formation in polydiacetylene para-toluene sulfonate

    NASA Astrophysics Data System (ADS)

    Wright, Ewan M.; Lawrence, Brian L.; Torruellas, William; Stegeman, George

    1995-12-01

    Numerical simulations of two-dimensional beam propagation in polydiacetylene para-toluene sulfonate measured values for n2>0 and n3<0 , where Delta n=n2I+n 3I2 , predict stable self-trapping and a new phenomenon in which a spatial ring evolves from a Gaussian input beam. We interpret the numerical results theoretically, using the variational model of nonlinear Gaussian beam propagation.

  6. RETROANLISE NEURAL PARA A IDENTIFICAO DOS PARMETROS ELSTICOS DA BARRAGEM CASCA DE FUNIL.

    E-print Network

    Coutinho, Alvaro L. G. A.

    1 RETROANÁLISE NEURAL PARA A IDENTIFICA��O DOS PAR�METROS ELÁSTICOS DA BARRAGEM CASCA DE FUNIL trabalho utiliza­se uma rede neural na identificação dos parâmetros elásticos dos materiais da casca e do maciço de fundação da barragem de Funil, a partir das medições efetuadas em cinco pontos instrumentados

  7. Reitor da Universidade de Lisboa reclama "medidas urgentes" para ensino superior

    E-print Network

    Instituto de Sistemas e Robotica

    Reitor da Universidade de Lisboa reclama "medidas urgentes" para ensino superior António Cruz Serra tomou posse como reitor da nova universidade que resulta da fusão da Clássica com a Técnica. Cruz Serra reitor da Universidade de Lisboa (UL), resultante da fusão entre a Clássica e a Técnica, falou nesta

  8. Design, synthesis and structure of novel para-quinones and their antibacterial activity.

    PubMed

    Pandurangan, Komala; Murnaghan, Kevin D; Walshe, Aurora; Müller-Bunz, Helge; Paradisi, Francesca; Morgan, Grace G

    2011-11-01

    Eight new para-quinones and one known analogue have been synthesized from p-chloranil. Five have been structurally characterized by single crystal diffraction, and a range of ligand folding is observed. All nine have been tested for their potency towards Gram(+) S. aureus and Gram(-) E. coli. Quinones 3, 6, 7 and 8 have shown activity towards S. aureus and quinones 3 and 8 also show good activity towards E. coli. PMID:21756289

  9. UM MODELO PARA RECOMENDAÇÃO DE ARTIGOS ACADÊMICOS BASEADO EM FILTRAGEM COLABORATIVA APLICADO À AMBIENTES MÓVEIS

    Microsoft Academic Search

    Sílvio César Cazella

    Resumo. Sistemas de Recomendação (SR) são hoje amplamente utilizados, principalmente na área de e-commerce como, por exemplo, Amazon.com e Submarino.com. Neste trabalho, propõe-se a utilização destes sistemas na educação, especificamente para a recomendação de conteúdo em dispositivos móveis. A vantagem de se utilizar sistemas de recomendação em dispositivos móveis está na facilidade da entrega da recomendação aos usuários. Com base

  10. 4-Amino-12-methyl­sulfon­yloxy-[2.2]para­cyclo­phane

    PubMed Central

    Meng, Xiangchao; Duan, Wenzeng; Han, Yinfeng

    2014-01-01

    The title compound, C17H19NO3S, was synthesized from 4-benzhydryl­idene­amino-12-hy­droxy-[2.2]para­cyclo­phane and methane­sulfonyl chloride. In the mol­ecule, the distance between the centroids of two aromatic rings is 2.960?(5)?Å. In the crystal, weak N—H?O and C—H?O hydrogen bonds link the mol­ecules into layers parallel to the ac plane. PMID:24526969

  11. Spontaneous rearrangement of para-sexiphenyl crystallites into nano-fibers

    Microsoft Academic Search

    C. Teichert; G. Hlawacek; A. Yu. Andreev; H. Sitter; P. Frank; A. Winkler; N. S. Sariciftci

    2006-01-01

    In the growth of para-sexiphenyl films on mica(001), an interesting phenomenon was observed where small individual crystallites\\u000a spontaneously arrange into parallel running high-aspect ratio chains with a length in the micrometer range. A statistical\\u000a analysis of the chain dimensions reveals a very narrow length distribution and the existence of a threshold length. The observation\\u000a of denuded zones around the chains

  12. El Grupo Actoral 80: Una alternativa para la integración latinoamericana en el teatro

    E-print Network

    Herná ndez, Alex

    1988-04-01

    Adjunto y uno de sus ideólogos principales) y reconocido oficialmente como grupo de teatro de la institución. EL GA '80: EL ACTOR Y LA INTEGRACIÓN LATINOAMERICANA Pero el hecho de que actores de distintas nacionalidades latino americanas (boliviana... sesiones de reflexión teórica (conducidas por Gene), decidió convertir la integración latino americana en uno de los ejes orientadores para su actividad, en su alternativa frente al Teatro, en su ideología. Notó también que la reunión de distintas...

  13. Quantum chemical and experimental study of 1,2,4-trihydroxy-para-menthane

    NASA Astrophysics Data System (ADS)

    Rottmannová, Lenka; Lukeš, Vladimír; Il?in, Michal; Fodran, Peter; Herich, Peter; Kožíšek, Jozef; Liptaj, Tibor; Klein, Erik

    2013-10-01

    The conformational analysis of the para-menthane (PM) and 1,2,4-trihydroxy-para-menthane (TPM) is performed using the quantum chemical density functional theory (DFT) and ab initio Møller-Plesset perturbation theory up to the second order (MP2). In TPM, three hydroxyl groups generate eight stereoisomers comparing to the four para-menthane stereoisomers. From the thermodynamics point of view, the most preferred conformations show the chair-shaped configuration of the cyclohexane ring. The obtained energy barriers for the isopropyl group rotation in the chair-shaped stereoisomers are between 35 and 45 kJ mol-1. The crystal structure as well as the solvated TPM stereoisomer isolated from the Tea tree oil, Melaleuca alternifolia (Maiden & Betche) Cheel, were investigated experimentally. Isolated stereoisomer corresponds to the most energetically preferred conformation and the calculated structural data agree very well with the results from the X-ray and nuclear magnetic resonance measurements. Finally, the influence of the conformation and the presence of the intramolecular hydrogen bonds on the homolytic Osbnd H bond dissociation enthalpies and proton affinities were also discussed with respect to the simple alcohols (methanol, iso-propanol, iso-pentanol, tert-butanol, cyclohexanol) and phenol.

  14. Atlas de aves: Un metodo para documentar distribucion y seguir poblaciones

    USGS Publications Warehouse

    Robbins, C.S.; Dowell, B.A.; Dawson, D.K.

    1988-01-01

    Los Atlas de Aves son proyectos nacionales o regionalies para trazar en mapas la distribucion en reproduccion de cada especie de ave. Ese procedimiento se esta usando en Europa, Australia, Nueva Zelanda, Norteamerica, y partes de Africa. El tama?o de los cuadrados varia de medio grado de latitud y Iongitud hasta 5 x 5 km. El trabajo de campo de cada proyecto exige aproxlmadamente cinco a?os, pero los aficionados pueden llevar a cabo la mayor parte del trabajo. Es posible almacenar los resultados en un computador personal. Hay muchos beneficios: (I) se presenta la distribucion corriente de las aves de la nacion, del estado, o de la Iocalidad; (2) se desarrolla nueva informacion especialmente sobre especies raras o en peligro; (3) se descubren areas que tienen una avlfauna sobresaliente o habitats raros y ayuda a su proteccion, (4) se documentan cambios de dlstribucion; (5) se pueden usar para documentar cambios de poblacion, especialmente en los tropicos donde otros metodos son mas dificiles de usar porque hay muchas especies y no hay muchos observadores calificados en la identificacion de sonidos de las aves; (6) son proyectos buenos de investigacion para estudiantes graduados; (7) los turistas y los jefes de excursiones de historia natural pueden contribuir con muchas informaciones

  15. Para-GMRF: parallel algorithm for anomaly detection of hyperspectral image

    NASA Astrophysics Data System (ADS)

    Dong, Chao; Zhao, Huijie; Li, Na; Wang, Wei

    2007-12-01

    The hyperspectral imager is capable of collecting hundreds of images corresponding to different wavelength channels for the observed area simultaneously, which make it possible to discriminate man-made objects from natural background. However, the price paid for the wealthy information is the enormous amounts of data, usually hundreds of Gigabytes per day. Turning the huge volume data into useful information and knowledge in real time is critical for geoscientists. In this paper, the proposed parallel Gaussian-Markov random field (Para-GMRF) anomaly detection algorithm is an attempt of applying parallel computing technology to solve the problem. Based on the locality of GMRF algorithm, we partition the 3-D hyperspectral image cube in spatial domain and distribute data blocks to multiple computers for concurrent detection. Meanwhile, to achieve load balance, a work pool scheduler is designed for task assignment. The Para-GMRF algorithm is organized in master-slave architecture, coded in C programming language using message passing interface (MPI) library and tested on a Beowulf cluster. Experimental results show that Para-GMRF algorithm successfully conquers the challenge and can be used in time sensitive areas, such as environmental monitoring and battlefield reconnaissance.

  16. Madres para la Salud: Design of a Theory-based Intervention for Postpartum Latinas

    PubMed Central

    Keller, Colleen; Records, Kathie; Ainsworth, Barbara; Belyea, Michael; Permana, Paska; Coonrod, Dean; Vega-López, Sonia; Nagle-Williams, Allison

    2011-01-01

    Background Weight gain in young women suggests that childbearing may be an important contributor to the development of obesity in women. Depressive symptoms can interfere with resumption of normal activity levels following childbirth or with the initiation of or adherence to physical activity programs essential for losing pregnancy weight. Depression symptoms may function directly to promote weight gain through a physiologic mechanism. Obesity and its related insulin resistance may contribute to depressed mood physiologically. Although physical activity has well-established beneficial effects on weight management and depression, women tend to under participate in physical activity during childbearing years. Further, the mechanisms underpinning the interplay of overweight, obesity, physical activity, depression, and inflammatory processes are not clearly explained. Objectives This report describes the theoretical rationale, design considerations, and cultural relevance for “Madres para la Salud” [Mothers for Health]. Design and Methods Madres para la Salud is a 12 month prospective, randomized controlled trial exploring the effectiveness of a culturally specific intervention using “bouts” of physical activity to effect changes in body fat, systemic and fat tissue inflammation, and postpartum depression symptoms in sedentary postpartum Latinas. Summary The significance and innovation of Madres para la Salud includes use of a theory-driven approach to intervention, specification and cultural relevance of a social support intervention, use of a Promotora model to incorporate cultural approaches, use of objective measures of physical activity in post partum Latinas women, and the examination of biomarkers indicative of cardiovascular risk related to physical activity behaviors in postpartum Latinas. PMID:21238614

  17. Interstellar processes: Ortho/para conversion, radiative association, and dissociative recombination

    NASA Astrophysics Data System (ADS)

    Herbst, Eric

    2015-01-01

    The study of the ortho-to-para ratio of assorted gas-phase interstellar molecules such as H2, H2O, NH3, and H2O+ has gained interest in recent years, based partially on new spectral observations of light hydrides by the Herschel Space Observatory. Although these ratios can yield valuable information about the thermal history of the interstellar cloud where the molecules are found, an understanding of how the ratios are determined involves a number of often poorly studied processes, which can include both gas-phase and grain-surface reactions. In this article, we consider the processes that determine the ortho-to-para ratio of the molecular ion H2O+ in diffuse interstellar clouds and attempt to reproduce an unusual observed ratio for this ion. In addition to the study of ortho-to-para ratios, we look carefully at current uncertainties in the gas-phase formation of large neutral molecules in cold dense interstellar clouds via ion-neutral radiative association and dissociative recombination, among other processes.

  18. The ortho:para ratio of H3+ in laboratory and astrophysical plasmas

    NASA Astrophysics Data System (ADS)

    Crabtree, Kyle N.; Indriolo, Nick; Kreckel, Holger; McCall, Benjamin J.

    2015-01-01

    The discovery of H3+ in the diffuse interstellar medium has dramatically changed our view of the cosmic-ray ionization rate in diffuse molecular clouds. However, another surprise has been that the ortho:para ratio of H3+ in these clouds is inconsistent with the temperature derived from the excitation of H2, the dominant species in these clouds. In an effort to understand this discrepancy, we have embarked on an experimental program to measure the nuclear spin dependence of the dissociative electron recombination rate of H3+ using the CRYRING and TSR ion storage rings. We have also performed the first measurements of the reaction H3++ H2? H2+ H3+ below room temperature. This reaction is likely the most common bimolecular reaction in the universe, and plays an important role in interconverting ortho- and para-H3+. Finally, we have constructed a steady-state chemical model for diffuse clouds, which takes into account the spin-dependence of the formation of H3+, its electron recombination, and its reaction with H2. We find that the ortho:para ratio of H3+ in diffuse clouds is likely governed by a competition between dissociative recombination and thermalization by reactive collisions.

  19. Conserved Alternative Splicing Patterns and Splicing Signals in the Drosophila Sodium Channel Gene Para

    PubMed Central

    Thackeray, J. R.; Ganetzky, B.

    1995-01-01

    We cloned genomic DNA corresponding to the Drosophila virilis homologue of para, a gene encoding a sodium channel ?-subunit, and obtained many partial cDNA clones from embryos and adults. Para protein has been well conserved, and the optional elements at six different sites of alternative splicing in D. melanogaster are present in D. virilis, in addition to one new optional exon. Among 31 different splice-types observed in D. virilis, the stage-specific pattern of alternative splicing seen in D. melanogaster is also conserved. Comparison of genomic DNA sequence revealed three aspects that vary between alternatively and constitutively used exon sequences. Sixteen short blocks (10-75 bp), the only recognizably conserved intron sequence, were disproportionately associated with alternatively used splice sites. Silent site substitutions were found much less frequently in alternative than constitutive exon elements, and the degree of match to the Drosophila splice site consensus tended to be lower at less frequently selected alternative splice junctions. This study shows that the developmentally regulated variability of para products is highly conserved and therefore likely to be of functional significance and suggests that a variety of different sequence-dependent mechanisms may regulate this pattern of alternative splicing. PMID:8536968

  20. Theoretical study of the design of a catalyst for para to ortho hydrogen conversion

    NASA Technical Reports Server (NTRS)

    Coffman, Robert E.

    1992-01-01

    The theory of Petzinger and Scalapino (1973) was thoroughly reviewed, and all of the basic equations for paramagnetic para to ortho hydrogen catalysis re-derived. There are only a few minor phase errors and errors of omission in the description of the theory. Three models (described by Petzinger and Scalapino) for the rate of para to ortho H2 catalysis were worked out, and uniform agreement obtained to within a constant factor of 2 pi. The analytical methods developed in the course of this study were then extended to two new models, which more adequately describe the process of surface catalysis including transfer of hydrogen molecules onto and off of the surface. All five equations for the para to ortho catalytic rate of conversion are described. The two new equations describe the catalytic rate for these models: H2 on the surface is a 2-D gas with lifetime tau; and H2 on the surface is a 2-D liquid undergoing Brownian motion (diffusion) with surface lifetime tau.

  1. Estudio de terapias dirigidas para el cáncer de seno estableció un modelo de estudios clínicos a nivel mundial

    Cancer.gov

    Dos medicamentos de acción dirigida, diseñados para tratar una forma agresiva de cáncer de seno (mama), se pusieron a prueba en un estudio que incluyó a 8 000 participantes en 44 países. Si bien la finalidad del estudio fue ayudar a que los investigadores determinaran si el tratamiento combinado con trastuzumab y lapatinib para el tratamiento del cáncer de seno HER2 positivo en estado inicial era mejor que la terapia solo con trastuzumab, los resultados del estudio no indicaron que existan ventajas para las mujeres al recibir la combinación de fármacos de trastuzumab o lapatinib.

  2. ParaDyn Implementation in the US Navy's DYSMAS Simulation System: FY08 Progress Report

    SciTech Connect

    Ferencz, R M; DeGroot, A J; Lin, J I; Zywicz, E; Durrenberger, J K; Sherwood, R J; Corey, I R

    2008-07-29

    The goal of this project is to increase the computational efficiency and capacity of the Navy's DYSMAS simulation system for full ship shock response to underwater explosion. Specifically, this project initiates migration to a parallel processing capability for the structural portion of the overall fluid-structure interaction model. The capstone objective for the first phase is to demonstrate operation of the DYSMAS simulation engine with a production model on a Naval Surface Warfare Center (IHD) parallel platform using the ParaDyn code for parallel processing of the structural dynamics. This year saw a successful launch to integrate ParaDyn, the high-parallel structural dynamics code from Lawrence Livermore National Laboratory (LLNL), into the DYSMAS system for simulating the response of ship structures to underwater explosion (UNDEX). The current LLNL version of DYNA3D, representing ten years of general development beyond the source branch used to initiate DYNA-N customization for DYSMAS, was first connected to the GEMINI flow code through DYSMAS Standard Coupler Interface (SCI). This permitted an early 'sanity check' by Naval Surface Warfare Center, Indian Head Division (NSWC-IHD) personnel that equivalent results were generated for their standard UNDEX test problems, thus ensuring the Verification & Validation pedigree they have developed remains intact. The ParaDyn code was then joined to the SCI in a manner requiring no changes to GEMINI. Three NSWC-IHD engineers were twice hosted at LLNL to become familiar with LLNL computer systems, the execution of the prototype software system, and to begin assessment of its accuracy and performance. Scaling data for the flow solver GEMINI was attained up to a one billion cell, 1000 processor run. The NSWC-IHD engineers were granted privileges to continue their evaluations through remote connections to LLNL's Open Computing Facility. Finally, the prototype changes were integrated into the mainline ParaDyn source repository and issued as part of its Version 8.1 beta release. This source was transmitted to NSWC-IHD and in collaboration with LLNL personnel the entire ParaDyn software suite successfully installed and demonstrated on its new SGI Altix machine. The ability of even minor numbers of processors for the structural dynamics to impact overall time-to-solution for DYSMAS has been demonstrated. Assessments of combined parallel efficiencies are beginning to highlight areas for further DYSMAS optimizations.

  3. Experiencia en la Construcción de un Objeto de Aprendizaje sobre el Ciclo de Krebs para favorecer el proceso de Enseñanza Aprendizaje en Bioquímica

    Microsoft Academic Search

    Vanessa Miguel; María Gertrudis López; Lisbeth Ramos; Omar Villarroel; Nora Montaño; Yosly Hernandez

    2007-01-01

    Se describe el proceso de diseño y construcción de un Objeto de Aprendizaje (OA) sobre el Ciclo de Krebs, utilizando la metodología ISD- MeLO (Instructional Systems Development Methodology based on e-Learning Objects). Para el desarrollo del OA se utilizaron las herramientas de software SWiSHMax para elaborar las animaciones, Adobe Photoshop para crear las imágenes del OA y Dreamweaver para el

  4. A single amino acid change in the para sodium channel protein is associated with knockdown-resistance ( kdr) to pyrethroid insecticides in German cockroach

    Microsoft Academic Search

    Ke Dong

    1997-01-01

    Previous genetic and pharmacological studies suggest that knockdown-resistance (kdr) to pyrethroid insecticides likely results from a mutation(s) in the para sodium channel gene. In this study, para sodium channel genes from an insecticide-susceptible German cockroach strain, CSMA, and a kdr-type German cockroach strain, Ectiban-R, were cloned and sequenced. Comparison of the nucleotide sequences of paraCSMA and paraEctiban-R revealed two nucleotide

  5. -REDES Y TELECOMUNICACIONES PARA PASES EN DESARROLLO No es previsible que sea necesaria una adaptacin de alumnos del Mster Oficial en

    E-print Network

    Rey Juan Carlos, Universidad

    - REDES Y TELECOMUNICACIONES PARA PAÍSES EN DESARROLLO No es previsible que sea necesaria una adaptación de alumnos del Máster Oficial en Redes de Telecomunicación para Países en Desarrollo hacia el nuevo título de Máster Universitario en Redes de Telecomunicación para Países en Desarrollo. Las razones

  6. El embarazo en la mujer con enfermedad cardiaca congénita: enfoque para el cardiólogo Congenital heart disease in the pregnant woman: a guide for the cardiologist

    Microsoft Academic Search

    Edgardo Vanegas; Juan K. Urrea

    La enfermedad cardiaca congénita es la forma más común de alteración estructural cardiaca que afecta a la mujer en edad reproductiva en los países en vía de desarrollo. En estas pacientes el embarazo se asocia con mayor riesgo tanto para la madre como para el feto. Se recomienda la consejería y una evaluación prenatal adecuada, para evaluar los riesgos e

  7. E S P A O L V A L E N C I E N G L I S H Mster Universitario en Desarrollo de Software para Dispositivos

    E-print Network

    Escolano, Francisco

    la página web del nuevo Máster Universitario en Desarrollo de Software para Dispositivos Móviles, queE S P A Ñ O L V A L E N C I À E N G L I S H Máster Universitario en Desarrollo de Software para a impartirse el Máster Universitario en Desarrollo de Software para Dispositivos Móviles de la Universidad de

  8. Instrucciones para la Preparacin de Manuscritos en Espaol Manuscritos sometidos a consideracin deben reportar resultados de investigaciones

    E-print Network

    Behmer, Spencer T.

    geográfica. Manuscritos que reporten resultados de trabajos rutinarios de laboratorio o de campo cuyo experimentos con insecticidas, acaricidas e insecticidas microbiales son aceptables para su publicación

  9. IMPLEMENTAC ~AO PARALELA DA LOCALIZAC ~AO DE MONTE CARLO PARA ROB^OS MOVEIS EM GPUS COMERCIAIS

    E-print Network

    Chaimowicz, Luiz

    Andr´e Lima Gaspar Ruas , Mario Montenegro Campos , Luiz Chaimowicz Emails: algruas@gmail.com, mario sensores laser em ambientes internos. Experimentos foram conduzidos para grandes quantidades de part

  10. Ensayo Ensayo Ensayo Ensayo in vivo in vivo in vivo in vivo para determinar agentes extraños en para determinar agentes extraños en para determinar agentes extraños en para determinar agentes extraños en células BHK-21 empleadas en la obtención de biológicos células BHK-21 empleadas en la obtención de biológicos células BHK-21 empleadas en la obtención de biológicos células BHK-21 empleadas en la obtención de biológicos

    Microsoft Academic Search

    Georgina Pardo; Ernesto Almora; Odalys Fidalgo; Arelys Zamora; Niurka Rodríguez; Ela María Pérez

    La controversia sobre los parámetros de calidad de las células de línea como substrato para la obtención de productos farmacéuticos ha sido un tema de interés desde 1987. Las pruebas realizadas a las células, generalmente siguen las recomendaciones de los \\

  11. IN VITRO EMBRYOTOXICITY OF A SERIES OF PARA-SUBSTITUTED PHENOLS: STRUCTURE, ACTIVITY AND CORRELATION WITH IN VIVO DATA

    EPA Science Inventory

    The embryotoxicity of phenol and twelve para-substituted congeners on mid-gestation rat embryos was evaluated in vitro. hrough application of correlative procedures and stepwise regression, equation describing the relationship between physical-chemical properties and various meas...

  12. Resultados de estudio para cáncer de pulmón indican beneficio en mortalidad con el uso de tomografía computarizada de baja dosis

    Cancer.gov

    El Instituto Nacional del Cáncer (NCI) da a conocer hoy resultados iniciales de un estudio de gran envergadura sobre métodos de detección para reducir el número de muertes por cáncer de pulmón al detectar cánceres en estadios relativamente iniciales.

  13. Desarrollo de Recursos para el Analisis Sintactico Automatico del Espa~nol: AVALON, una gramatica formal y CSA, un corpus

    E-print Network

    Escolano, Francisco

    Desarrollo de Recursos para el An´alisis Sint´actico Autom´atico del Espa~nol: AVALON, una gram, Desarrollo de Re- cursos para el An´alisis Sint´actico del Es- pa~nol: AVALON, una gram´atica formal, y CSA por una secci´on del grupo de investigaci´on Gram´atica del espa~nol perteneciente a la Universidad de

  14. Aceleraci'on de la convergencia en m'etodos de Jacobi para el Problema Sim'etrico de Valores

    E-print Network

    Giménez, Domingo

    puede resolver por m'etodos de Jacobi. Para reducir el tiempo de ejecuci'on de estos m'etodos se puede posibilidad de reducci'on del tiempo de ejecuci'on con­ siste en usar m'etodos por bloques [3] con los que seAceleraci'on de la convergencia en m'etodos de Jacobi para el Problema Sim'etrico de Valores

  15. INSTITUTO SUPERIOR DE AGRONOMIA ESTATSTICA E DELINEAMENTO 2011/12

    E-print Network

    Lisboa, Universidade Técnica de

    , 34, 62) > y raiz objecto acabado de criar, escrevemos o seu nome: > raiz x y 1 1 5 2 7 10 3 13 12 4 20 29 5 27 36 6 34 83 7 à utilizada para objectos de tipo matriz: > raiz[,1] [1] 1 7 13 20 27 34 62 > raiz[,2] [1] 5 10 12

  16. Toxicología Postmortem: estudio analítico de cocaína en cerebro

    Microsoft Academic Search

    Mora A; Arroyo A; Sánchez M

    2008-01-01

    Resumen: El screening de drogas de abuso postmortem en casos de presunta causa de muerte por sobredosis es un análisis habitual en todos los laboratorios toxicológicos. La matriz más utilizada y común para el estudio es la sangre debido a su relación temporal con los efectos en el individuo y su estado en el momento de la muerte. Otras matrices

  17. Monografía del sector de electricidad y gas colombiano. Condiciones actuales y retos futuros

    Microsoft Academic Search

    Ana María SANDOVAL

    2004-01-01

    Durante los últimos años, el sector de Energía y Gas ha venido ganando cada vez más importancia tanto a nivel nacional como internacional. En Colombia, la creciente conciencia de la necesidad por contar con una matriz energética eficiente ha motivado diversas reformas estructurales y regulatorias, que se han reflejado en el desarrollo de programas y planes nacionales para la racionalización

  18. A Introdução de Astronomia Básica para Estudantes de 5 e 6 Séries do Ensino Fundamental

    NASA Astrophysics Data System (ADS)

    Gonzaga, E. P.; Voelzke, M. R.

    2008-09-01

    Com intuito de despertar o interesse pelo estudo da astronomia, desenvolveu-se entre 2003 e 2006 no Centro Educacional do Serviço Social da Indústria situado no município de Mauá, São Paulo, um trabalho com duração de 12 meses para turmas de 11 e 12 anos, sendo três turmas por período (2003 / 2004, 2004 / 2005 e 2005 / 2006). O trabalho realizado, objetivando a introdução da astronomia básica com observações de constelações e das fases da Lua, permitindo estender-se a outros corpos celestes, iniciou-se com visita ao planetário Mundo Estelar, localizado no Ipiranga, São Paulo levantou-se a questão da importância do estudo da astronomia e foi lançado aos estudantes um trabalho de observação, com a proposta de localizar as constelações e compreender as fases da Lua, para o registro de tais observações, foram distribuídos mapas celestes, pastas, planilhas de anotações com lacunas para, constelações, fases da Lua e relatos, onde os estudantes acrescentaram pesquisas e relatórios. Os resultados dos 346 estudantes foram que 86,7% (300) concluíram a etapa de observação, destes 300 estudantes 43,3% (130) pesquisaram sobre as constelações e 19,0% (57) localizaram até quatro constelações. Dos 346 estudantes, 44,2% (153) registraram as fases da Lua equivocadamente e 10,4% (36) anexaram reportagens sobre astronomia. Conclui-se que os estudantes se dividiram em pesquisadores, sendo os estudantes que registraram e anexaram informações e, os observadores que preencheram as planilhas de observações, além de desenvolverem habilidades e competências relacionadas ao estudo da astronomia.

  19. Supported transition metal catalysts for para- to ortho-hydrogen conversion

    NASA Technical Reports Server (NTRS)

    Brooks, Christopher J.; Wang, Wei; Eyman, Darrell P.

    1994-01-01

    The main goal of this study was to develop and improve on existing catalysts for the conversion of ortho- to para-hydrogen. Starting with a commercially available Air Products nickel silicate, which had a beta value of 20, we were trying to synthesize catalysts that would be an improvement to AP. This was accomplished by preparing silicates with various metals as well as different preparation methods. We also prepared supported ruthenium catalysts by various techniques using several metal precursors to improve present technology. What was also found was that the activation conditions prior to catalytic testing was highly important for both the silicates and the supported ruthenium catalysts. While not the initial focus of the research, we made some interesting observations into the adsorption of H2 on ruthenium. This helped us to get a better understanding of how ortho- to para-H2 conversion takes place, and what features in a catalyst are important to optimize activity. Reactor design was the final area in which some interesting conclusions were drawn. As discussed earlier, the reactor catalyst bed must be constructed using straight 1/8 feet OD stainless steel tubing. It was determined that the use of 1/4 feet OD tubing caused two problems. First, the radius from the center of the bed to the wall was too great for thermal equilibrium. Since the reaction of ortho- to para-H2 is exothermic, the catalyst bed center was warmer than the edges. Second, the catalyst bed was too shallow using a 1/4 feet tube. This caused reactant blow-by which was thought to decrease the measured activity when the flow rate was increased. The 1/8 feet tube corrected both of these concerns.

  20. Un diverticule géant para urétéral chez l’enfant révélé par une masse pelvienne

    PubMed Central

    Kassogué, Amadou; Diarra, Alkadri; Benzekri, Younes; Doumbia, Aliou; Bouabdallah, Youssef; Traoré, Zacharia; Tizniti, Siham; Mellas, Soufiane; Tazi, Mohammed Fald; Ammari, Jalal Eddine El; Khallouk, Abdelhak; Fassi, Mohammed Jamal El; Farih, My Hassan

    2014-01-01

    Résumé Nous rapportons un cas de diverticule géant para-urétéral chez un enfant de 18 mois, du point de vue des aspects cliniques, diagnostiques et thérapeutiques. Aucune anomalie associée n’a été relevée. Le patient était un enfant de sexe masculin, et la symptomatologie était dominée par la rétention aiguë d’urine et la présence d’une infection urinaire. La chirurgie a consisté en une diverticulectomie laparoscopique avec réimplantation urétéro-vésicale. L’évolution a été favorable avec disparition des signes urinaires. PMID:24940473

  1. Abnormal expansion during the ferro- to para-magnetic transition in pure iron

    NASA Astrophysics Data System (ADS)

    Park, Jihye; Jung, Minsu; Lee, Young-Kook

    2015-03-01

    The strain change near the Curie temperature was investigated during continuous heating of pure iron using two different types of dilatometers with and without a radio frequency (RF) field. Contrary to the well-known fact that the ferro- to para-magnetic transition accompanies volumetric contraction, abnormal expansion was observed near the Curie temperature only when the quench dilatometer employing the RF field for heating was used. The abnormal expansion was caused primarily by the change in electron-phonon interaction under the RF field.

  2. Three-dimensional treatment planning for para-aortic node irradiation in patients with cervical cancer

    SciTech Connect

    Munzenrider, J.E.; Doppke, K.P.; Brown, A.P.; Burman, C.; Cheng, E.; Chu, J.; Chui, C.; Drzymala, R.E.; Goitein, M.; Manolis, J.M. (Massachusetts General Hospital, Boston, MA (USA))

    1991-05-15

    Three-dimensional treatment planning has been used by four cooperating centers to prepare and analyze multiple treatment plans on two cervix cancer patients. One patient had biopsy-proven and CT-demonstrable metastasis to the para-aortic nodes, while the other was at high risk for metastatic involvement of para-aortic nodes. Volume dose distributions were analyzed, and an attempt was made to define the role of 3-D treatment planning to the para-aortic region, where moderate to high doses (50-66 Gy) are required to sterilize microscopic and gross metastasis. Plans were prepared using the 3-D capabilities for tailoring fields to the target volumes, but using standard field arrangements (3-D standard), and with full utilization of the 3-D capabilities (3-D unconstrained). In some but not all 3-D unconstrained plans, higher doses were delivered to the large nodal volume and to the volume containing gross nodal disease than in plans analyzed but not prepared with full 3-D capability (3-D standard). The small bowel was the major dose limiting organ. Its tolerance would have been exceeded in all plans which prescribed 66 Gy to the gross nodal mass, although some reduction in small bowel near-maximum dose was achieved in the 3-D unconstrained plans. All plans were able to limit doses to other normal organs to tolerance levels or less, with significant reductions seen in doses to spinal cord, kidneys, and large bowel in the 3-D unconstrained plans, as compared to the 3-D standard plans. A high probability of small bowel injury was detected in one of four 3-D standard plans prescribed to receive 50 Gy to the large para-aortic nodal volume; the small bowel dose was reduced to an acceptable level in the corresponding 3-D unconstrained plan. An optimum beam energy for treating this site was not identified, with plans using 4, 6, 10, 15, 18, and 25 MV photons all being equally acceptable. (Abstract Truncated)

  3. Photochemical transformation of nitrate in the presence of para-halogenated phenols in frozen solutions

    NASA Astrophysics Data System (ADS)

    Abida, O.; Osthoff, H. D.; Sutherland, T. C.

    2010-12-01

    Photochemical reactions leading to the chemical transformation of trace compounds in the atmosphere do not only occur in the atmospheric gas and liquid phases, but also in the tropospheric ice phase. The photochemical reactions of trace compounds embedded in ice have important implications for the composition of the atmospheric boundary layer in ice and snow covered regions and for interpretation of concentration profiles in snow and ice in the context of the composition of the past atmosphere. One of the prominent reactions is the photolysis of nitrate. This reaction is well established in natural waters, and is of interest since formation of highly mutagenic/carcinogenic nitro-compounds is possible. In contrast, the photochemical behaviour of nitrate in ice and snow is more complex. The photolysis of nitrate embedded in ice has been shown to generate OH radical, NO2(g) and NO(g) as primary photoproducts, but little is known how this photochemistry is affected by the presence of organic impurities embedded in the ice surface. In this work, we studied the effect of the presence of para-halogenated phenols on the photo-transformation of frozen nitrate solutions by Diffuse Reflective Infrared Fourier Transform Spectroscopy (DRIFTS). Moreover, the evolution of volatile nitrogen oxides to the gas phase was monitored by a commercial chemiluminescence NO/NOy monitor, chemical ionization mass spectrometry (CIMS), and thermal-dissociation cavity ring-down spectroscopy (TD-CRDS). In addition, some of the organic intermediate products were characterized by GC/MS and HPLC/PDA. We show that DRIFTS can provide a qualitative picture of the chemical transformations that take place at the ice surface and kinetic data on the phototransformation of nitrate. The photochemistry of frozen solutions of nitrate in the presence of various para-halogenated phenols was found to be dependent on the ice temperature, pH, the light intensity, and the concentration and nature of para-halogenated phenols added. The release of NOy species to the gas-phase was dramatically accelerated by low pH values as well as the nature of para-halogen, in the order Cl>Br>F. The major species released were identified as NO2 and HONO.

  4. The Ortho:Para Ratio of H3+ in Diffuse Molecular Clouds

    NASA Astrophysics Data System (ADS)

    Crabtree, Kyle N.; Indriolo, Nick; Kreckel, Holder; Tom, Brian A.; McCall, Benjamin J.

    2010-11-01

    Since its first interstellar detection in the mid 1990s, H3+ has proved to be a powerful probe of astrophysical conditions. In cold molecular clouds, only the lowest two rotational energy levels of H3+ are populated: the (J,K) = (1,1) para state and the (1,0) ortho state. The relative populations of these levels can be used to calculate an excitation temperature, Tex. In dense molecular clouds, Tex agrees well with the estimated cloud kinetic temperature. However, in diffuse molecular clouds, Tex is found to be 30 K, while the kinetic temperature, as determined from the excitation temperature T01 (given by the relative populations of the J = 0 and J = 1 rotational levels of H2) is on average 60-70 K in these environments. Because the (1,1) state of H3+ is the lower-energy state, this indicates that there is more para-H3+ in diffuse molecular clouds than would be expected based on the cloud kinetic temperature. To understand the excess para-H3+ (or the lower-than-expected Tex), we have constructed a chemical model that takes into account the nuclear spin dependence of H3+ formation, proton scrambling via collisions with H2, and dissociative recombination with electrons. At the heart of this model is the reaction H3+ + H2 ? H2 + H3+ , which can proceed by one of three pathways: the identity, proton hop, and hydrogen exchange. The branching fractions for the three pathways, Sid, Shop, and Sexch, influence the nature and extent of the proton scrambling. We use the microcanonical statistical model of Park and Light (J. Chem. Phys. 126, 044305, 1997) to calculate nuclear-spin-dependent rate coefficients that describe the extent of proton scrambling as a function of temperature and the aforementioned branching fractions. As a result, our model predicts, based on these parameters, what the observed Tex should be for a certain cloud kinetic temperature. Our model suggests that on its own, the H3+ + H2 reaction would effectively thermalize the ortho:para H3+ ratio (i.e., Tex = T01). However, dissociative recombination is taken into account, this thermalization is incomplete, and the resultant competition between thermalization and dissociative recombination seems to reproduce the astronomical observations for Sid ~ 0.8-0.9. However, the details of the spin-dependence of H3+ dissociative recombination are important, and at present, experimentally uncertain. More information about this process is needed to determine the validity of our modeling results.

  5. Natural bond orbital population analysis of para-substituted O -nitrosyl carboxylate compounds

    Microsoft Academic Search

    Li Xiao-Hong; Chen Qing-Dong; Zhang Xian-Zhou

    2009-01-01

    Theoretical study of several para-substituted O-nitrosyl carboxylate compounds has been performed using density functional B3LYP method with 6-31G(d,p) basis set. Geometries\\u000a obtained from DFT calculation were used to perform natural bond orbital analysis. It is noted that weakness in the O3–N2 sigma bond is due to $$ n_{{{\\\\text{O}}_{1} }} \\\\to \\\\sigma_{{{\\\\text{O}}_{3} - {\\\\text{N}}_{2} }}^{*} $$ delocalization and is responsible for

  6. A centroid molecular dynamics study of liquid para-hydrogen and ortho-deuterium.

    PubMed

    Hone, Tyler D; Voth, Gregory A

    2004-10-01

    Centroid molecular dynamics (CMD) is applied to the study of collective and single-particle dynamics in liquid para-hydrogen at two state points and liquid ortho-deuterium at one state point. The CMD results are compared with the results of classical molecular dynamics, quantum mode coupling theory, a maximum entropy analytic continuation approach, pair-product forward- backward semiclassical dynamics, and available experimental results. The self-diffusion constants are in excellent agreement with the experimental measurements for all systems studied. Furthermore, it is shown that the method is able to adequately describe both the single-particle and collective dynamics of quantum liquids. PMID:15446940

  7. Semantics-based distributed I/O with the ParaMEDIC framework.

    SciTech Connect

    Balaji, P.; Feng, W.; Lin, H.; Mathematics and Computer Science; Virginia Tech; North Carolina State Univ.

    2008-01-01

    Many large-scale applications simultaneously rely on multiple resources for efficient execution. For example, such applications may require both large compute and storage resources; however, very few supercomputing centers can provide large quantities of both. Thus, data generated at the compute site oftentimes has to be moved to a remote storage site for either storage or visualization and analysis. Clearly, this is not an efficient model, especially when the two sites are distributed over a wide-area network. Thus, we present a framework called 'ParaMEDIC: Parallel Metadata Environment for Distributed I/O and Computing' which uses application-specific semantic information to convert the generated data to orders-of-magnitude smaller metadata at the compute site, transfer the metadata to the storage site, and re-process the metadata at the storage site to regenerate the output. Specifically, ParaMEDIC trades a small amount of additional computation (in the form of data post-processing) for a potentially significant reduction in data that needs to be transferred in distributed environments.

  8. The new ParaDIgm: IgM from bench to clinic

    PubMed Central

    Hanala, Sherif

    2012-01-01

    The inaugural IgM event entitled “The new ParaDIgm: IgM from bench to clinic” brought together the increasingly active and growing IgM antibody community to discuss recent advances and challenges facing the discovery and development of IgM antibody therapies and technologies. Researchers, clinicians and biomanufacturing experts delivered 21 talks on the basic science and isolation of IgM, upstream and downstream development, and formulation and clinical development of the molecules. Participants networked around topics aimed at exploring the full potential of IgM antibodies. The meeting was held at DECHEMA Gesellschaft für Chemische Technik und Biotechnologie e. V. (Society for Chemical Engineering and Biotechnology), a non-profit scientific and technical society based in Frankfurt am Main, Germany. The meeting was sponsored by Patrys, Laureate Biopharma, Bio-Rad Laboratories, BIA Separations, Percivia and the Bio Affinity Company (BAC). The second New ParaDIgm: IgM from bench to clinic meeting, will be held on April 23–24, 2013 in Frankfurt, Germany. PMID:22864407

  9. Comportamiento Sexual y Autoeficacia para la Negociación de Sexo Más Seguro en Personas Heterosexuales

    PubMed Central

    Pérez-Jiménez, David; Santiago-Rivas, Marimer; Serrano-García, Irma

    2012-01-01

    La autoeficacia se le ha identificado como uno de los factores que puede facilitar o dificultar llevar a cabo sexo más seguro. Estudios revelan que las personas que están el relaciones estables usan métodos de protección menos frecuente que quienes tienen parejas casuales. Realizamos un estudio con 447 personas heterosexuales activas sexualmente. Les administramos un cuestionario dirigido a medir el comportamiento sexual, el uso del condón masculino y la práctica de la masturbación mutua, y la autoeficacia para llevar a cabo estas conductas. Los resultados reflejan que los hombres están más activos sexualmente y que el uso del condón y la práctica de la masturbación mutua como alternativa de sexo más seguro es muy baja. En los casos donde se usa el condón esta práctica es realizada en su mayoría por las personas que se encuentran en una relación de pareja casual. No obstante, los/las participantes tienen altos niveles de autoeficacia hacia ambas prácticas. Aunque la autoeficacia es uno de los factores que incide en decidir llevar a cabo sexo más seguro, ésta no es suficiente para que esta meta se logre. PMID:22837585

  10. The Ortho-to-Para Ratio of Ammonia in the L1157 Outflow

    NASA Astrophysics Data System (ADS)

    Umemoto, Tomofumi; Mikami, Hitomi; Yamamoto, Satoshi; Hirano, Naomi

    1999-11-01

    We have measured the ortho-to-para ratio of ammonia in the blueshifted gas of the L1157 outflow by observing the six metastable inversion lines from (J,K)=(1,1) to (6, 6). The highly excited (5, 5) and (6, 6) lines were first detected in the low-mass star-forming regions. The rotational temperature derived from the ratio of four transition lines from (3, 3) to (6, 6) is 130-140 K, suggesting that the blueshifted gas is heated by a factor of ~10 as compared to the quiescent gas. The ortho-to-para ratio of the NH3 molecules in the blueshifted gas is estimated to be 1.3-1.7, which is higher than the statistical equilibrium value. This ratio provides us with evidence that the NH3 molecules have been evaporated from dust grains with the formation temperature between 18 and 25 K. It is most likely that the NH3 molecules on dust grains have been released into the gas phase through the passage of strong shock waves produced by the outflow. Such a scenario is supported by the fact that the ammonia abundance in the blueshifted gas is enhanced by a factor of ~5 with respect to the dense quiescent gas. Based on observations made at the Nobeyama Radio Observatory (NRO). NRO is a branch of the National Astronomical Observatory, an interuniversity research institute operated by the Ministry of Education, Science, Sport, and Culture, Japan.

  11. Rotational relaxation of CS by collision with ortho- and para-H{sub 2} molecules

    SciTech Connect

    Denis-Alpizar, Otoniel [Université de Bordeaux, ISM, UMR CNRS 5255, 33405 Talence (France) [Université de Bordeaux, ISM, UMR CNRS 5255, 33405 Talence (France); Departamento de Física, Universidad de Matanzas, Matanzas 40100 (Cuba); Stoecklin, Thierry, E-mail: t.stoecklin@ism.u-bordeaux1.fr; Halvick, Philippe [Université de Bordeaux, ISM, UMR CNRS 5255, 33405 Talence (France)] [Université de Bordeaux, ISM, UMR CNRS 5255, 33405 Talence (France); Dubernet, Marie-Lise [Université Pierre et Marie Curie, LPMAA, UMR CNRS 7092, 75252 Paris, France and Observatoire de Paris, LUTH, UMR CNRS 8102, 92195 Meudon (France)] [Université Pierre et Marie Curie, LPMAA, UMR CNRS 7092, 75252 Paris, France and Observatoire de Paris, LUTH, UMR CNRS 8102, 92195 Meudon (France)

    2013-11-28

    Quantum mechanical investigation of the rotationally inelastic collisions of CS with ortho- and para-H{sub 2} molecules is reported. The new global four-dimensional potential energy surface presented in our recent work is used. Close coupling scattering calculations are performed in the rigid rotor approximation for ortho- and para-H{sub 2} colliding with CS in the j = 0–15 rotational levels and for collision energies ranging from 10{sup ?2} to 10{sup 3} cm{sup ?1}. The cross sections and rate coefficients for selected rotational transitions of CS are compared with the ones previously reported for the collision of CS with He. The largest discrepancies are observed at low collision energy, below 1 cm{sup ?1}. Above 10 cm{sup ?1}, the approximation using the square root of the relative mass of the colliders to calculate the cross sections between a molecule and H{sub 2} from the data available with {sup 4}He is found to be a good qualitative approximation. The rate coefficients calculated with the electron gas model for the He-CS system show more discrepancy with our accurate results. However, scaling up these rates by a factor of 2 gives a qualitative agreement.

  12. A non-equilibrium ortho-to-para ratio of water in the Orion PDR

    NASA Astrophysics Data System (ADS)

    Choi, Y.; van der Tak, F. F. S.; Bergin, E. A.; Plume, R.

    2014-12-01

    Context. The ortho-to-para ratio (OPR) of H2O is thought to be sensitive to the temperature of water formation. The OPR of H2O is thus useful for studying the formation mechanism of water. Aims: We investigate the OPR of water in the Orion PDR (photon-dominated region), at the Orion Bar and Orion S positions, using data from Herschel/HIFI. Methods: We detect the ground-state lines of ortho- and para-H218O in the Orion Bar and Orion S and estimate the column densities using local thermodynamical equilibrium (LTE) and non-LTE methods. Results: Based on our calculations, the OPR in the Orion Bar is 0.1-0.5, which is unexpectedly low given the gas temperature of ~85 K, and also lower than the values measured for other interstellar clouds and protoplanetary disks. Toward Orion S, our OPR estimate is below 2. Conclusions: This low OPR at 2 positions in the Orion PDR is inconsistent with gas phase formation and with thermal evaporation from dust grains, but it may be explained by photodesorption. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.Appendices are available in electronic form at http://www.aanda.org

  13. ParaHox gene expression in larval and postlarval development of the polychaete Nereis virens (Annelida, Lophotrochozoa)

    PubMed Central

    Kulakova, Milana A; Cook, Charles E; Andreeva, Tatiana F

    2008-01-01

    Background Transcription factors that encode ANTP-class homeobox genes play crucial roles in determining the body plan organization and specification of different organs and tissues in bilaterian animals. The three-gene ParaHox family descends from an ancestral gene cluster that existed before the evolution of the Bilateria. All three ParaHox genes are reported from deuterostomes and lophotrochozoans, but not to date from any ecdysozoan taxa, and there is evidence that the ParaHox genes, like the related Hox genes, were ancestrally a single chromosomal cluster. However, unlike the Hox genes, there is as yet no strong evidence that the ParaHox genes are expressed in spatial and temporal order during embryogenesis. Results We isolated fragments of the three Nereis virens ParaHox genes, then used these as probes for whole-mount in situ hybridization in larval and postlarval worms. In Nereis virens the ParaHox genes participate in antero-posterior patterning of ectodermal and endodermal regions of the digestive tract and are expressed in some cells in the segment ganglia. The expression of these genes occurs in larval development in accordance with the position of these cells along the main body axis and in postlarval development in accordance with the position of cells in ganglia along the antero-posterior axis of each segment. In none of these tissues does expression of the three ParaHox genes follow the rule of temporal collinearity. Conclusion In Nereis virens the ParaHox genes are expressed during antero-posterior patterning of the digestive system (ectodermal foregut and hindgut, and endodermal midgut) of Nereis virens. These genes are also expressed during axial specification of ventral neuroectodermal cell domains, where the expression domains of each gene are re-iterated in each neuromere except for the first parapodial segment. These expression domains are probably predetermined and may be directed on the antero-posterior axis by the Hox genes, whose expression starts much earlier during embryogenesis. Our results support the hypothesis that the ParaHox genes are involved in antero-posterior patterning of the developing embryo, but they do not support the notion that these genes function only in the patterning of endodermal tissues. PMID:18510732

  14. ORTHO-TO-PARA ABUNDANCE RATIO OF WATER ION IN COMET C/2001 Q4 (NEAT): IMPLICATION FOR ORTHO-TO-PARA ABUNDANCE RATIO OF WATER

    SciTech Connect

    Shinnaka, Yoshiharu; Kawakita, Hideyo; Kobayashi, Hitomi [Koyama Astronomical Observatory, Kyoto Sangyo University, Motoyama, Kamigamo, Kita-ku, Kyoto 603-8555 (Japan); Boice, Daniel C.; Martinez, Susan E. [Southwest Research Institute, 6220 Culebra Road, San Antonio, TX 78238 (United States)

    2012-04-20

    The ortho-to-para abundance ratio (OPR) of cometary molecules is considered to be one of the primordial characteristics of cometary ices, and contains information concerning their formation. Water is the most abundant species in cometary ices, and OPRs of water in comets have been determined from infrared spectroscopic observations of H{sub 2}O rovibrational transitions so far. In this paper, we present a new method to derive OPR of water in comets from the high-dispersion spectrum of the rovibronic emission of H{sub 2}O{sup +} in the optical wavelength region. The rovibronic emission lines of H{sub 2}O{sup +} are sometimes contaminated by other molecular emission lines but they are not affected seriously by telluric absorption compared with near-infrared observations. Since H{sub 2}O{sup +} ions are mainly produced from H{sub 2}O by photoionization in the coma, the OPR of H{sub 2}O{sup +} is considered to be equal to that of water based on the nuclear spin conservation through the reaction. We have developed a fluorescence excitation model of H{sub 2}O{sup +} and applied it to the spectrum of comet C/2001 Q4 (NEAT). The derived OPR of water is 2.54{sup +0.32}{sub -0.25}, which corresponds to a nuclear spin temperature (T{sub spin}) of 30{sup +10}{sub -4} K. This is consistent with the previous value determined in the near-infrared for the same comet (OPR = 2.6 {+-} 0.3, T{sub spin} = 31{sup +11}{sub -5} K).

  15. Millimeter-Wave Spectroscopy of S_2Cl_2: a Candidate Molecule for the Detection of Ortho-Para Transition

    NASA Astrophysics Data System (ADS)

    Dehghani, Zeinab Tafti; Mizoguchi, Asao; Kanamori, Hideto

    2014-06-01

    S_2Cl_2 is a candidate molecule for the detection of ortho-para transition, because the Cl atoms on the skewed position from the rotational principle axes give large off-diagonal terms in the quadrupole interaction, which can mix ortho and para states. In order to estimate the ortho-para mixing in a hyperfine-resolved rotational state, pure rotational transitions were measured by millimeter-wave spectroscopy using two different experimental set-ups. The transitions from the term value around 20 K was measured with a supersonic jet and those around 200 K were measured with a dry ice cooled gas cell. Hundreds of peaks were assigned for the naturally abundant S235Cl2 and S235Cl37Cl isotopic species, and the rotational molecular constants including the fourth-order and sixth-order centrifugal distortion constants were determined. The hyperfine structures were partly resolved in some Q-branch transitions and those spectral patterns were well reproduced with the hyperfine constants determined by the previous FTMW spectroscopy in the cm-wave region. With the new molecular constants determined in this study and the previous hyperfine constants, it becomes possible to predict a more reliable ortho-para mixing ratio and to narrow down the possible candidate transitions in the mm-wave region for the detection of ortho-para transition. Mizoguchi et al., J. Mol. Spectrosc. 250,86-97(2008)

  16. Para-axillary subcutaneous endoscopic approach in torticollis: tips and tricks in the surgical technique.

    PubMed

    Tokar, Baran; Karacay, Safak; Arda, Surhan; Alici, Umut

    2015-04-01

    Aim?An obvious scar on the neck may appear following the open surgery for congenital muscular torticollis (CMT). The cosmetic result may displease the patient and the family. In this study, we describe a minimally invasive technique, para-axillary subcutaneous endoscopic approach (PASEA) in CMT. Patients and Methods?A total of 11 children (seven girls and four boys with the age range between 1 and 15 years) were operated for torticollis by PASEA. All patients had facial asymmetry and head and neck postural abnormality. Following an incision at the ipsilateral para-axillary region, a subcutaneous cavernous working space is formed toward sternocleidomastoid (SCM) muscle. The muscle and fascia are cut by cautery under endoscopic vision. The patients had postoperative 2nd-week and 3rd-month visits. The incision scar, inspection, and palpation findings of the region, head posture, and shoulder position of the affected side were considered in evaluation of the cosmetic outcome. Preoperative and postoperative range of motion of the head and neck were compared for functional outcome. Results?We preferred single incision surgery in our last two patients; the rest had double para-axillary incision for port insertion. Incomplete transection of the muscle was not observed. There was no serious complication. Postoperatively, head posture and shoulder elevation were corrected significantly. Range of motion of the head was improved. Postoperatively, all the patients had rotation capacity with more than 30 degrees. The range of postoperative flexion and extension movements was between 45 and 60 degrees. Conclusions?The open surgery techniques of CMT causes visible lifelong incision scar on the neck. PASEA leaves a cosmetically hidden scar in the axillary region. A single incision surgery is also possible. A well-formed cavernous working space is needed. External manual palpation, delicate dissection, and cutting of SCM muscle with cautery are the important components of the procedure. Surgeons having experience in pediatric minimal invasive surgery may consider PASEA as an alternative to the open approach in CMT. The surgeon should be familiar with surgical anatomy of the neck and must be highly competent in management of possible complications in the region. PMID:24347289

  17. Infrared and electronic spectra of microhydrated para-dichlorobenzene cluster cations

    NASA Astrophysics Data System (ADS)

    Chakraborty, Shamik; Patzer, Alexander; Lagutschenkov, Anita; Langer, Judith; Dopfer, Otto

    2010-01-01

    Microhydrated para-dichlorobenzene cation clusters, pDCB +sbnd (H 2O) n with n = 1 and 2, were characterised in the electronic ground state by infrared photodissociation spectroscopy in the O-H and C-H stretch ranges and B3LYP/6-311++G?? calculations. The intermolecular pDCB +sbnd H 2O potential features at least two nonequivalent minima with charge-dipole configuration and comparable binding energies. The pDCB +sbnd (H 2O) 2 spectrum reveals the presence of two types of isomers, in which either a (H 2O) 2 dimer or two single H 2O ligands are attached to pDCB +. The detected pDCB +sbnd (H 2O) 1,2 complexes are unreactive with respect to nucleophilic substitution. This conclusion is supported for pDCB +sbnd H 2O by the electronic spectrum of its B ? X transition.

  18. Cholecystocutaneous fistula: an unusual complication of a para-umbilical hernia repair.

    PubMed

    Dixon, Steven; Sharma, Mitesh; Holtham, Stephen

    2014-01-01

    This case describes a 94-year-old woman who presented 2?years postsutured para-umbilical hernia repair with a painful black lump protruding through her scar with blood stained discharge. This was initially thought to be either ischaemic bowel secondary to strangulated incisional hernia or a large organised haematoma. An urgent CT scan was performed following which the patient passed two large calculi and bile-stained fluid spontaneously through the wound, making the diagnosis somewhat clearer. The scan revealed an incisional hernia containing the gallbladder and two large calculi at the skin surface and an incidental large caecal cancer with surrounding lymphadenopathy. Frail health and the incidental finding of a colon cancer rendered invasive surgical management inappropriate. Therefore, she was managed conservatively with antibiotics. A catheter was inserted into the fistula tract to allow free drainage and alleviate pressure-related symptoms. The patient was discharged following a multidisciplinary team discussion. PMID:24862413

  19. El Proyecto Sismico "LARSE" - Trabajando Hacia un Futuro con Mas Seguridad para Los Angeles

    USGS Publications Warehouse

    Henyey, Thomas L.; Fuis, Gary S.; Benthien, Mark L.; Burdette, Thomas R.; Christofferson, Shari A.; Clayton, Robert W.; Criley, Edward E.; Davis, Paul M.; Hendley, James W., II; Kohler, Monica D.; Lutter, William J.; McRaney, John K.; Murphy, Janice M.; Okaya, David A.; Ryberg, Trond; Simila, Gerald W.; Stauffer, Peter H.

    1999-01-01

    La region de Los Angeles contiene una red de fallas activas, incluyendo muchas fallas por empuje que son profundas y no rompen la superficie de la tierra. Estas fallas ocultas incluyen la falla anteriormente desconocida que fue responsable por la devastacion que ocurrio durante el terremoto de Northridge en enero de 1994, el terremoto mas costoso en la historia de los Estados Unidos. El Experimento Sismico en la Region de Los Angeles (Los Angeles Region Seismic Experiment, LARSE), esta localizando los peligros ocultos de los terremotos debajo de la region de Los Angeles para mejorar la construccion de las estructuras que pueden apoyar terremotos que son inevitables en el futuro, y que ayudaran a los cientificos determinar donde occurira el sacudimento mas fuerte y poderoso.

  20. Phonon-assisted ortho-para conversion in solid H 2 under pressure

    NASA Astrophysics Data System (ADS)

    Feodosyev, S. B.; Gospodarev, I. A.; Strzhemechny, M. A.; Hemley, R. J.

    2001-07-01

    A version of the Jacobi matrix method is employed to calculate, in the harmonic approximation, certain spectral densities which are involved in the evaluation of conversion rates in solid hydrogen at elevated pressures. The elements of the dynamical matrix used in spectral density calculations were reconstructed from measured (acoustic and Brillouin scattering) and calculated elastic moduli cij. Double conversion (i.e., the process when both interacting ortho molecules become para) is shown to bring an appreciable contribution (comparable to that of single conversion) at pressures above 250 MPa ( 2.5 kbar). Other factors that are important at high pressures have been taken into account, in particular, the compression-related decrease in conversion energy caused by the increasing negative offset due to the electrostatic quadrupole-quadrupole interaction between ortho molecules. The conversion rates calculated as a function of pressure are in good agreement with experiment at moderate pressures.

  1. Food for Life / Comida para la Vida: creating a food festival to raise diabetes awareness.

    PubMed

    Lancaster, Kristie; Walker, Willie; Vance, Thomas; Kaskel, Phyllis; Arniella, Guedy; Horowitz, Carol

    2009-01-01

    African and Latino Americans have higher rates of diabetes and its complications than White Americans. Identifying people with undiagnosed diabetes and helping them obtain care can help to prevent complications and mortality. To kick off a screening initiative, our community-academic partnership created the "Food for Life Festival," or "Festival Comida para la Vida." This article will describe the community's perspective on the Festival, which was designed to screen residents, and demonstrate that eating healthy can be fun, tasty, and affordable in a community-centered, culturally consonant setting. More than 1,000 residents attended the event; 382 adults were screened for diabetes, and 181 scored as high risk. Fifteen restaurants distributed free samples of healthy versions of their popular dishes. Community residents, restaurateurs, and clinicians commented that the event transformed many of their preconceived ideas about healthy foods and patient care. PMID:20097997

  2. Rational extensions of the trigonometric Darboux-Pöschl-Teller potential based on para-Jacobi polynomials

    E-print Network

    B. Bagchi; Y. Grandati; C. Quesne

    2014-11-28

    The possibility for the Jacobi equation to admit in some cases general solutions that are polynomials has been recently highlighted by Calogero and Yi, who termed them para-Jacobi polynomials. Such polynomials are used here to build seed functions of a Darboux-B\\"acklund transformation for the trigonometric Darboux-P\\"oschl-Teller potential. As a result, one-step regular rational extensions of the latter depending both on an integer index $n$ and on a continuously varying parameter $\\lambda$ are constructed. For each $n$ value, the eigenstates of these extended potentials are associated with a novel family of $\\lambda$-dependent polynomials, which are orthogonal on $\\left] -1,1\\right[ $.

  3. Observation of crystallization slowdown in supercooled para-hydrogen and ortho-deuterium quantum liquid mixtures

    E-print Network

    Matthias Kühnel; José M. Fernández; Filippo Tramonto; Guzmán Tejeda; Elena Moreno; Anton Kalinin; Marco Nava; Davide E. Galli; Salvador Montero; Robert E. Grisenti

    2014-10-10

    We report a quantitative experimental study of the crystallization kinetics of supercooled quantum liquid mixtures of para-hydrogen (pH$_2$) and ortho-deuterium (oD$_2$) by high spatial resolution Raman spectroscopy of liquid microjets. We show that in a wide range of compositions the crystallization rate of the isotopic mixtures is significantly reduced with respect to that of the pure substances. To clarify this behavior we have performed path-integral simulations of the non-equilibrium pH$_2$-oD$_2$ liquid mixtures, revealing that differences in quantum delocalization between the two isotopic species translate into different effective particle sizes. Our results provide first experimental evidence for crystallization slowdown of quantum origin, offering a benchmark for theoretical studies of quantum behavior in supercooled liquids.

  4. La Observación Sistemática de Vecindarios: El caso de Chile y sus perspectivas para Trabajo Social

    PubMed Central

    Sanhueza, Guillermo E.; Delva, Jorge; Andrade, Fernando H.; Grogan-Kaylor, Andrew; Bares, Cristina; Castillo, Marcela

    2012-01-01

    El estudio acerca de las características de los vecindarios y sus efectos sobre las personas ha llegado a ser un área de creciente atención por parte de investigadores de diversas disciplinas en países desarrollados. Aunque actualmente existen diversas metodologías para estudiar efectos del vecindario, una de las más utilizadas es la Observación Sistemática de Vecindarios –Systematic Social Observation SSO, en inglés—porque permite recolectar información acerca de diversas características del entorno físico, social, ambiental y económico de los vecindarios donde se aplica. El objetivo de este artículo es (i) dar a conocer sumariamente algunas investigaciones influyentes sobre efectos del vecindario en Estados Unidos, ii) describir cómo se diseñó e implementó la Observación Sistemática de Vecindarios en la ciudad de Santiago de Chile, iii) señalar algunos facilitadores y obstaculizadores de la implementación del proyecto y, finalmente iv) enunciar posibles contribuciones y limitaciones que esta metodología ofrecería al trabajo social en Chile. PMID:24791060

  5. Analysis of the thermal reaction products of para polyphenylene by combined gas chromatography-mass spectrometry

    NASA Technical Reports Server (NTRS)

    Fewell, L. L.

    1976-01-01

    Analysis of the volatiles and sublimate produced when para-polyphenylene is pyrolyzed to constant weight under vacuum in the temperature range from 380 to 1000 C indicates that the polymer undergoes thermal degradation in two stages. The first stage involved dehydrohalogenation, which is essentially a curing reaction that produces crosslinking between polyphenylene chains resulting from the loss of chlorine from the polymer in the form of hydrogen chloride. The second stage of the thermal degradation is dehydrogenation because hydrogen is the major volatile species. Increasing amounts of polycyclic aromatic hydrocarbons (phenanthrene and 9, 10 benzphenanthrene) in the sublimate, concomitant with increasing C/H ratios of the polymeric residue with pyrolysis temperature, is consistent with the buildup of polynuclear structures in the polymer matrix.

  6. Surface treatment of para-aramid fiber by argon dielectric barrier discharge plasma at atmospheric pressure

    NASA Astrophysics Data System (ADS)

    Gu, Ruxi; Yu, Junrong; Hu, Chengcheng; Chen, Lei; Zhu, Jing; Hu, Zuming

    2012-10-01

    This paper is focused on influence of argon dielectric barrier discharge (DBD) plasma on the adhesive performance and wettability of para-aramid fibers and three parameters including treated power, exposure time and argon flux were detected. The interfacial shear strength (IFSS) was greatly increased by 28% with 300 W, 60 s, 2 L min-1 argon flux plasma treatment. The content of oxygen atom and oxygen-containing polar functional groups were enhanced after the argon plasma treated, so as the surface roughness, which contributed to the improvement of surface wettability and the decrease of contact angle with water. However, long-time exposure, exorbitant power or overlarge argon flux could partly destroy the prior effects of the treatment and damage the mechanical properties of fibers to some degree.

  7. A method to obtain a well-defined fraction of respirable para-aramid fibers.

    PubMed

    Schins, R P; Gaudichet, A; Jaurand, M C

    1993-10-01

    We developed a preparation method to obtain respirable-sized fractions of para-aramid fibers. The procedure, based on floatability, consists of stirring and subsequent settling of p-aramid pulp in distilled water. Two distinct phases are obtained, with small fibers in the upper part of the suspension, which represents about 33% of the total volume. Optimal results were obtained when 2.0 g pulp was stirred for 15 hr in 800 ml distilled water containing 0.125% ethanol and settled for 5 hr. The mass yield ranged between 0.4 and 0.6%, more than 90% of the particles had an aspect ratio > or = 3:1. The mean fiber length was about 6 microns, and the mean fiber diameter was about 0.4 microns as determined by transmission and scanning electron microscopy. The number of fibers obtained was 4 x 10(6) fibers/micrograms under our standard conditions. PMID:8119251

  8. Transient effects and pump depletion in stimulated Raman scattering. [Para-hydrogen

    SciTech Connect

    Carlsten, J.L.; Wenzel, R.G.; Druehl, K.

    1983-01-01

    Stimulated rotational Raman scattering in a 300-K multipass cell filled with para-H/sub 2/ with a single-mode CO/sub 2/-pumped laser is studied using a frequency-narrowed optical parametric oscillator (OPO) as a probe laser at the Stokes frequency for the S/sub 0/(O) transition. Amplification and pump depletion are examined as a function of incident pump energy. The pump depletion shows clear evidence of transient behavior. A theoretical treatment of transient stimulated Raman scattering, including effects of both pump depletion and medium saturation is presented. In a first approximation, diffraction effects are neglected, and only plane-wave interactions are considered. The theoretical results are compared to the experimental pulse shapes.

  9. Development of a para-orthohydrogen catalytic converter for a solid hydrogen cooler

    NASA Technical Reports Server (NTRS)

    Nast, T. C.; Hsu, I. C.

    1984-01-01

    Design features of a tested catalytic converter for altering vented cryogenic parahydrogen used as a coolant on spacecraft into a para-ortho equilibrium for channeling to other cooling functions are described. The hydrogen is expected to be stored in either liquid or solid form. A high surface area Ni-on-Si catalyst was selected for tests at an operating pressure of 2 torr at a ratio of 1000 gr catalyst for a gr/sec hydrogen flow. Cylindrical and radial flow geometries were tried and measurements centered on the converter efficiencies at different operating temperatures when the converter was placed in the vent line of the H2 cooler. Efficiencies ranging from 10-100 percent were obtained for varying flow rates. Further testing is necessary to characterize the converter performance under a wider range of operating temperatures and environments.

  10. Torsion- of para-ovarian cyst resulting in secondary torsion of the fallopian tube: a cause of acute abdomen.

    PubMed

    Gedam, Jaya Kundan; Rajput, Disha Andhiwal; Bhalerao, Minal V

    2014-05-01

    A 32-year-old woman presented with abdominal pain in the left lower quadrant, of one day's duration. Ultrasonography of the abdomen revealed a cystic structure in the right adnexa, probably with torsion. Computerized tomography of abdomen and pelvis showed a large pelvic cyst which arose most likely from the left ovary. An urgent laparotomy was done, which however showed a twisted para-ovarian cyst with a twisted fallopian tube on the left side. The para-ovarian cyst was removed along with left sided fallopian tube and the patient made an uneventful recovery. Torsion of a para-ovarian cyst and fallopian tube is rare, but it should be considered in the differential diagnosis of acute abdomen in women who are in the reproductive age group. PMID:24995222

  11. Uso de modelos mecânicos em curso informal de astronomia para deficientes visuais. Resgate de uma experiência

    NASA Astrophysics Data System (ADS)

    Tavares, E. T., Jr.; Klafke, J. C.

    2003-08-01

    O presente trabalho propõe-se a resgatar uma experiência que teve lugar no Planetário de São Paulo nos anos 60. Em 1962, o Sr. Acácio, então com 37 anos, deficiente visual desde os 27, passou a assistir às aulas ministradas pelo Prof. Aristóteles Orsini aos integrantes do corpo de servidores do Planetário. O Sr. Acácio era o único deficiente da turma e, embora possuísse conhecimentos básicos e relativamente avançados de matemática, enfrentava dificuldades na compreensão e acompanhamento da exposição, como também em estudos posteriores. Com o intuito de auxiliá-lo na superação desses problemas, o Prof. Orsini solicitou a construção de modelos mecânicos que, através do sentido do tato, permitissem o acompanhamento das aulas e a transposição do modelo para o "constructo" mental. Essa prática mostrou-se tão eficaz que facilitou sobejamente o aprendizado da matéria pelo sujeito. O Sr. Acácio passou a integrar o corpo de professores do Planetário/Escola Municipal de Astrofísica, tendo ficado responsável pelo curso de "Introdução à Astronomia" por vários anos. Além disso, a experiência foi tão bem sucedida que alguns dos modelos tiveram seus elementos constitutivos pintados diferencialmente para serem utilizados em cursos regulares do Planetário, tornando-se parte integrante do conjunto de recursos didáticos da instituição. É pensando nessa eficácia, tanto em seu objetivo original permitir o aprendizado de um deficiente visual quanto no subsidiário recurso didático sistemático da instituição que decidimos resgatar essa experiência. Estribados nela, acreditamos ser extremamente produtivo, em termos educacionais, o aperfeiçoamento dos modelos originais, agora resgatados e restaurados, e a criação de outros que pudessem ser utilizados no ensino dessa ciência a deficientes visuais.

  12. The analysis of para-cresol production and tolerance in Clostridium difficile 027 and 012 strains

    PubMed Central

    2011-01-01

    Background Clostridium difficile is the major cause of antibiotic associated diarrhoea and in recent years its increased prevalence has been linked to the emergence of hypervirulent clones such as the PCR-ribotype 027. Characteristically, C. difficile infection (CDI) occurs after treatment with broad-spectrum antibiotics, which disrupt the normal gut microflora and allow C. difficile to flourish. One of the relatively unique features of C. difficile is its ability to ferment tyrosine to para-cresol via the intermediate para-hydroxyphenylacetate (p-HPA). P-cresol is a phenolic compound with bacteriostatic properties which C. difficile can tolerate and may provide the organism with a competitive advantage over other gut microflora, enabling it to proliferate and cause CDI. It has been proposed that the hpdBCA operon, rarely found in other gut microflora, encodes the enzymes responsible for the conversion of p-HPA to p-cresol. Results We show that the PCR-ribotype 027 strain R20291 quantitatively produced more p-cresol in-vitro and was significantly more tolerant to p-cresol than the sequenced strain 630 (PCR-ribotype 012). Tyrosine conversion to p-HPA was only observed under certain conditions. We constructed gene inactivation mutants in the hpdBCA operon in strains R20291 and 630?erm which curtails their ability to produce p-cresol, confirming the role of these genes in p-cresol production. The mutants were equally able to tolerate p-cresol compared to the respective parent strains, suggesting that tolerance to p-cresol is not linked to its production. Conclusions C. difficile converts tyrosine to p-cresol, utilising the hpdBCA operon in C. difficile strains 630 and R20291. The hypervirulent strain R20291 exhibits increased production of and tolerance to p-cresol, which may be a contributory factor to the virulence of this strain and other hypervirulent PCR-ribotype 027 strains. PMID:21527013

  13. PREVENCION DE VIH PARA MUJERES HISPANAS DE 50 AÑOS Y MÁS

    PubMed Central

    Villegas, N.; Cianelli, R.; Ferrer, L.; Kaelber, L.; Peragallo, N.; Yaya, Alexandra O.

    2012-01-01

    Introducción Las mujeres Hispanas de 50 años y más (MHC) son una minoría en Estados Unidos que está a elevado riesgo de adquirir VIH y son el grupo menos estudiado en lo que respecta a salud, características sociales y de comportamiento sexual. Objetivo Investigar los factores que incrementan el riesgo de VIH en las MHC con el propósito de desarrollar o adaptar una intervención apropiada para la “edad y la cultura "de este grupo de mujeres. Metodología Estudio descriptivo de corte transversal con una muestra de 50 MHC, sexualmente activas y que residían en Miami, Florida, Estados Unidos. Se utilizó un cuestionario estructurado administrado por entrevistadores entrenados y bilingües (inglés/español). Las participantes fueron reclutadas en diferentes lugares en el Sur de Florida. Para el análisis de los datos se utilizó estadística descriptiva, tanto medidas de tendencia central como medidas de dispersión. Resultados La edad promedio de las MHC fue de 55,7 ± 6 años (rango 50–76 años). Todas las MHC estaban en la menopausia. Prevención del VIH Las MHC reportaron niveles medios de conocimientos sobre VIH y comunicación con la pareja. En la muestra se reportó la presencia de síntomas depresivos, violencia en la pareja, actitudes negativas hacia las personas viviendo con VIH y baja percepción de riesgo de adquirir VIH. Las MHC mencionaron necesidades de aprendizaje en tópicos relacionados con prevención de VIH y cambios de la edad. Conclusión Las MHC están a riesgo de adquirir VIH y tienen necesidades especiales en términos de educación sobre prevención de VIH. PMID:25242862

  14. Computational studies of the regioselectivities of COMT-catalyzed meta-/para-O methylations of luteolin and quercetin.

    PubMed

    Cao, Yang; Chen, Zhong-Jian; Jiang, Hui-Di; Chen, Jian-Zhong

    2014-01-16

    Catechol-O-methyltransferase (COMT, EC 2.1.1.6) plays a central role in the inactivation of neurotransmitters sharing a catecholic motif by transferring a methyl group from AdoMet. Methylation of the meta-hydroxyl is much more common than that of the para-hydroxyl in many COMT substrates, such as dopamine and norepinephrine. Our experimental data showed that quercetin preferred meta-methylation but luteolin favored a para-methylation. To elucidate the mechanism for different preferences of methylations of quercetin and luteolin, we performed a theoretical investigation on the different regioseletivities of COMT-catalyzed methylations for quercetin and luteolin by a combined approach of MD simulations, ab initio calculations, and QM/MM computations. The ab initio calculation results showed that both quercetin and luteolin have more negative charge distributions on the meta-O atom than the para-O atom, which indicated that meta-O preferred SN2 reaction for their methylation. Our QM/MM computations also confirmed that these two flavonoids have lower reaction energetic barriers for COMT-catalyzed meta-O-methylation than para-O-methylation. On the other hand, our binding free energy computation results indicated that quercetin has a more stable binding mode for meta-O-methylation than para-O-methylation but luteolin has a more stable binding mode for para-O-methylation than meta-O-methylation. We gave a comprehensive explanation considering both thermodynamics and reaction kinetics aspects and discussed the protein-inhibitor interactions as well as the O-methylation mechanism in our present work. PMID:24354565

  15. APORTES AL DESARROLLO DE UN BLANCO DE PRODUCCIÓN DE NEUTRONES PARA LA TERAPIA POR CAPTURA NEUTRÓNICA EN BORO (BNCT) CON ACELERADORES

    Microsoft Academic Search

    M. S. Herrera; D. H. Ziella; X. Doligez; A. J. Kreiner; A. A. Burlon; A. A. Valda

    En este trabajo se presentan los estudios realizados para el diseño de un blanco de producción de neutrones que utiliza la reacción 7Li(p,n)7Be para la terapia por captura neutrónica en boro, BNCT, basada en aceleradores. En particular el interés estuvo centrado en la discusión y evaluación de algunas de las dificultades técnicas para la fabricación y operación de un blanco,

  16. APLICAO DE AGENTES MVEIS EM REDES DE SENSORES SEM FIO PARA LOCALIZAO E SEGUIMENTO DE OBJETOS ALVOS MVEIS

    E-print Network

    Wagner, Flávio Rech

    APLICAÇÃO DE AGENTES MÓVEIS EM REDES DE SENSORES SEM FIO PARA LOCALIZAÇÃO E SEGUIMENTO DE OBJETOS sistema embarcado baseada em uma aplicação de localização e seguimento de objeto alvo utilizando redes de sensores sem fio (RSSF). Sendo os nós da rede fixos, realiza-se o seguimento do alvo utilizando agentes

  17. Mecanismo de encaminamiento y asignacin de longitud de onda Basado en Prediccin para Redes de Transporte ptico

    E-print Network

    Politècnica de Catalunya, Universitat

    Mecanismo de encaminamiento y asignación de longitud de onda Basado en Predicción para Redes de, pareta, jordid} @ac.upc.es Resumen En redes de transporte óptico los algoritmos de encaminamiento y estado de la red. Debido a diferentes factores, en redes altamente dinámicas esta información de estado

  18. Suporte para vistas em ambientes de gesto de rede Palavras chave: Vistas, Gesto de Rede, CRC2000.

    E-print Network

    Rodrigues, Luís E.T.

    1 Suporte para vistas em ambientes de gestão de rede Palavras chave: Vistas, Gestão de Rede, CRC2000. Resumo Em sistemas de gestão de redes, uma vista representa uma perspectiva parcelar do universo sistema Scotty, uma conhecida plataforma de gestão de rede de domínio público. I. Introdução A grande

  19. Limitaciones en los protocolos de redes Ethernet - TCP\\/IP para su utilización como buses de campo industriales

    Microsoft Academic Search

    Fabiana Ferreira; Pablo Capotondo

    Resumen— La utilización de redes Ethernet TCP- IP como buses de campo en las aplicaciones de control industrial se está difundiendo rápidamente. Sin embargo las Ethernet industriales disponibles en el mercado proponen diversas modificaciones a los protocolos para poder aplicarse. Los motivos por los que estos protocolos deben modificarse todavía no están bien delimitados, ni tampoco si estas modificaciones son

  20. Informacin de Aplicacin de estudia cia de ExxonMobil Bernard Harris (EMBHSSC) en el verano es organizado para

    E-print Network

    Wang, Hai

    : El campamento de cien proporcionar actividades, experimentos, proyectos, y experiencias de campo para de campo. Maestros certificados y la facultad universitarios enseñarán las clases. El campamento será aguantado el campo de la Universidad del Sur de California en Los Angeles, Estudiantes estarán ubicados en