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1

Demanda por fundos de investimento RF e DI: um modelo de escolha discreta  

Microsoft Academic Search

Resumo : Neste artigo usamos a teoria da organização industrial para analisar os determinantes da demanda de fundos de investimento de renda fixa e DI no Brasil. Utilizamos um Modelo de Escolha Discreta conhecido como Logit Aninhado, dividindo os fundos de investimento em grupos de acordo com a similaridade das instituições que os administram. Dessa forma, evitamos os problemas relacionados

Thiago Rodrigues; Ricardo Buscariolli Pereira; Juliana Inhasz

2008-01-01

2

ESTUDO DOS PARÂMETROS DO MODELO DE VAZAMENTOS DE UM SETOR DA REDE DE DISTRIBUIÇÃO DE ÁGUA DE PIRACICABA-SP  

Microsoft Academic Search

Resumo - O presente estudo visa avaliar as perdas por vazamento para um setor da rede de distribuição de água da cidade de Piracicaba, SP, Brasil. Para tanto, utiliza-se um procedimento iterativo de avaliação hidráulica que considera as perdas por vazamento e a dependência das demandas com a pressão, acoplado ao simulador hidráulico EPANET 2 (Rossman, 2000), com vistas à

Alexandre Kepler Soares; Luisa Fernanda; Ribeiro Reis

3

Vínculos sobre um modelo de quartessência de Chaplygin usando observações do satélite chandra da fração de massa de gás em aglomerados de galáxias  

NASA Astrophysics Data System (ADS)

Observações de Supernovas do tipo Ia mostram que a expansão do Universo está acelerando. Segundo as equações de Einstein uma componente com pressão negativa (energia escura) é necessária para explicar a aceleração cósmica. Além da energia escura é usualmente admitido que no Universo há também uma matéria exótica com pressão zero, que é chamada de matéria escura. Essa componente possui um papel fundamental na formação de estruturas no Universo. Recentemente tem se explorado a possibilidade de que matéria e energia escura poderiam ser unificadas através de uma única componente, que tem sido denominada de quartessência. Um exemplo de fluido com essas características é o Gás de Chaplygin Generalizado, que possui uma equação de estado da forma p = -A/ra. Inicialmente consideramos o caso especial a = 1 (gás de Chaplygin) e vinculamos parâmetros do modelo utilizando observações em raios-X do satélite Chandra da fração de massa de gás em aglomerados de galáxias. Uma comparação dos vínculos obtidos com esse teste com outros testes, tais como supernovas e idade do Universo, mostra que esse teste é bastante restritivo. Exibiremos ainda resultados para o caso em que a curvatura é nula e o parâmetro a está compreendido no intervalo -1 < a 1.

de Souza, R. S.

2003-08-01

4

Modelo de galaxia disco  

NASA Astrophysics Data System (ADS)

El objetivo de este trabajo es estudiar la formación de galaxias anillo, a través de simulaciones numéricas. En el estudio numérico es necesario construir el modelo de una galaxia disco normal, en condición de equilibrio estable, que se ajuste a los parámetros observacionales disponibles de estos objetos. En dicho modelo se considera la galaxia constituída por un halo de materia oscura, un bulge y el disco propiamente dicho. A partir de perfiles de densidad obtenidos de las observaciones, se lleva a cabo la distribución espacial de las partículas, a través del ``Método del rechazo". La asignación de velocidades se realiza considerando que las partículas del disco están aproximadamente en equilibrio rotacional, y se agregan dispersiones de velocidad de acuerdo con el parámetro de Toomre Q=1.5.

Ledesma, M.; Mosconi, M.

5

UM Weather  

NSDL National Science Digital Library

Sponsored by The Weather Underground at the University of Michigan at Ann Arbor, UM Weather bills itself as the "Internet's premier source of weather information." The site offers several general audience tools such as the Fast Forecast for any city in the US, ski weather, and weather cams. But, it also provides access to over two dozen weather software packages, a new computer model forecasts page, and most impressively a list of close to 400 other weather related Web sites. Professionals and researchers will appreciate the non-technical feel of the site and the valuable information they can procure from it.

1994-01-01

6

Cyclops Worko w Server: Uma Proposta para um modelo de um servidor de uxo de atividades mØdico-hospitalar  

Microsoft Academic Search

Our initial motivation to study concerning this domain application was consolidated through difculty lived for health care institutes. The main hospital difculties are in treatment of informations and work ow management. The implementation of process management systems requires the use of sustai- nable technologies. In processes management scene in workow management information system, the workow engine is a very important

Aldo von Wangenheim; Rafael Andrade

7

Comparação de modelos para o cálculo de perturbações orbitais devidas à maré terrestre  

NASA Astrophysics Data System (ADS)

Aplicações recentes de satélites artificiais com finalidades geodinâmicas requerem órbitas determinadas com bastante precisão. Em particular marés terrestres influenciam o potencial terrestre causando perturbações adicionais no movimento de satélites artificiais, as quais tem sido medidas por diversos processos. A atração exercida pela lua e pelo sol sobre a terra produz deslocamentos elásticos em seu interior e uma protuberância em sua superfície. O resultado é uma pequena variação na distribuição da massa na terra, consequentemente no geopotencial. As perturbações nos elementos orbitais de satélites artificiais terrestres devidas a maré terrestre podem ser estudadas a partir das equações de Lagrange, considerando-se um conveniente potencial. Por outro lado, como tem sido feito pelo IERS, as mudanças induzidas pela maré terrestre no geopotencial podem ser convenientemente modeladas como variações nos coeficientes Cnm e Snm do geopotencial. As duas teorias ainda não foram comparados para um mesmo satélite. Neste trabalho são apresentadas e comparadas as variações de longo período e seculares nas perturbações orbitais devidas à maré terrestre, calculadas por um modelo simples, o de Kozai, e pelo modelo do IERS. Resultados preliminares mostram, para os satélites SCD2 e CBERS1, e para a Lua em movimento elíptico e precessionando, as perturbações seculares no argumento do perigeu e na longitude do nodo ascendente.

Vieira Pinto, J.; Vilhena de Moraes, R.

2003-08-01

8

TESTES F PARA MODELOS MISTOS DE GRUPOS DE EXPERIMENTOS COM CULTIVARES AVALIADAS EM DIFERENTES FASES DA LUA, MESES E ANOS1  

Microsoft Academic Search

RESUMO - Com este estudo objetivou -se determinar as expressões que justifiquem a aplicação dos testes F em grupos de experimentos com cultivares, avaliadas em diferentes fases da lua, épocas de semeadura e anos. Para efetuar a análise conjunta, adotou -se um modelo linear misto, no qual os efeitos de cultivares (C), fases da lua (L), épocas (E) e suas

AQUILES JÚNIOR DA CUNHA; AUGUSTO RAMALHO DE MORAIS; ROVILSON JOSÉ DE SOUZA; CRISTIANE R. B. AGUIRRE RAMOS

9

Um-1 Lubricating Grease.  

National Technical Information Service (NTIS)

In order to increase the low temperature properties of thick lubricating grease (UM-1) based on mineral oil and ceresine, vinylcyclohexene is added, and diphenylamine as antioxidant. The proposed grease can be used up to 120C. Low temperature grease compo...

M. Y. Berkovich V. S. Gulerman L. M. Levinson P. N. Matyushin V. A. Popov

1966-01-01

10

UM NOVO MODELO MATEM´ ATICO PARA OTIMIZAC ¸ ˜ AO DA CONFIABILIDADE EM ALIMENTADORES  

Microsoft Academic Search

An eletric utility must install protection and sectionaliz ing devices in key points of its distribution network to serve its customers with a relia ble power supply. Utility boards or similar commissions define measures (reliability indices) to quantify, analize, and regulate the eletric utility services. This work presents a nonlinear bi nary programming optimization mo- del that generalizes the already

Debora Z. Bossois; Eduardo Zambon; Berilhes B. Garcia; Elias F. Azeredo

11

Um modelo de suporte à avaliação formativa para ambientes de EaD  

Microsoft Academic Search

This technical report presents a Formative Assessment Support Model for Learning Management Systems. This model is based on Hadji' (2001) recommendations to a more formative assessment. The proposed model aims to support the mapping of these recommendations to the distance education domain, considering the formative assessment of collaborative and constructionist learning activities. The model explores computational technologies to provide a

Joice Lee Otsuka; Heloísa Vieira da Rocha

2001-01-01

12

Um modelo do sistema termorregulador do corpo humano: exposição a ambientes quentes  

Microsoft Academic Search

A transient mathematical model for the human heat transfer system has been developed. It is based on a single cylinder, representing the body, with four concentric annular layers: core, muscle, fat and skin. It includes metabolic heat generation, conduction of heat in tissue, convection of heat by flowing blood, heat transfer by radiation, convection and evaporation at the surface and

M. S. Ferreira; J. I. Yanagihara

13

12 PASSOS PARA IMPLEMENTAÇÃO DE UM MODELO DE GESTÃO ESTRATÉGICA DO CONHECIMENTO EM UMA EMPRESA INDUSTRIAL  

Microsoft Academic Search

In the last years, as a result of the economy globalization, the companies were forced to get better or to change the way of administering in order to keep competitive advantage. In this scene, intangible assets such as organizational learning and knowledge creation appeared or emerged as the main factors defining the organization's competitivity structured under the concept of Intellectual

Carlos Augusto de Sous; Luiz Martello de Souza; Marcos Damião de Azevedo

14

ColonizaÁªo e biologia reprodutiva de mamangavas (Xylocopa frontalis) em um modelo de ninho racional  

Microsoft Academic Search

Carpenter bees (Xylocopa spp.) are important pollinators, but rearing them for introduction in agricultural areas has been difficult because of their nesting behavior. Models of rational nesting boxes, which allow observing their interior, manipulating the nests and transporting them to the orchards, have not been accepted by the bees. The present work tested colonization and reproductive biology of carpenter bees

Hugo de Oliveira Filho; Breno Magalh

15

Transferências orbitais dentro do modelo quase bicircular no sistema Terra-Lua-Sol  

NASA Astrophysics Data System (ADS)

O problema quase bicircular planar consiste na determinação da dinâmica de um corpo, de massa desprezível, que se move sob o campo gravitacional de três corpos. No caso estudado, o quarto corpo é considerado um satélite artificial e os demais são a Terra, a Lua e o Sol, formando o sistema de três corpos. Este modelo permite a construção de uma hamiltoniana similar a do problema restrito de três corpos (PRTC), incluindo termos periódicos não autônomos, provenientes da presença do Sol, portanto pode ser entendido como uma perturbação ao PRTC. Suas órbitas periódicas aparecem isoladas e possuem o mesmo período solar. Os pontos de equilíbrio colineares possuem o mesmo caráter de estabilidade linear dos pontos lagrangianos (L1, L2 e L3) do PRTC, sendo do tipo sela x centro x centro, instável na direção x e estáveis nas direções y e z. As órbitas periódicas tridimensionais ao redor do ponto colinear é chamada órbita Halo. O objetivo deste trabalho é determinar órbitas de transferências de baixo consumo de combustível para um veículo espacial partindo de uma órbita de estacionamento ao redor da Terra em direção a uma órbita Halo do ponto L1, situado entre a Terra e Lua. Esta tarefa pode ser transformada no problema de valor de contorno: dado um ponto inicial na órbita de estacionamento, um ponto final na órbita halo e o tempo de transferência, deseja-se obter a trajetória que liga estes dois pontos e que minimize os incrementos de velocidade do veículo. Essas transferências são realizadas baseadas no método de Lambert e analisadas de modo a fornecer um baixo consumo. Posteriormente, é feita uma comparação de consumo com as órbitas de transferência equivalentes do PRTC.

Corrêa, A. A.; de Almeida Prado, A. F. B.; Stuchi, T. J.; Beaugé, C.

2003-08-01

16

Espectro de radiación derivado de un modelo de colapso protoestelar  

NASA Astrophysics Data System (ADS)

El exceso de emisión infrarroja en objetos protoestelares es atribuido usualmente a un disco de material en torno al cuerpo central. A pesar del avance alcanzado en la elaboración de modelos, aún existen dificultades para explicar la ley de temperatura del disco necesaria para reproducir las luminosidades y perfiles de energía observados. Nuestra propuesta consiste en determinar la distribución espectral de la radiación derivada de un particular modelo de colapso protoestelar, y estudiar la evolución del espectro desde estadíos tempranos de la contracción gravitatoria. Este plan es orientado a evaluar las propiedades del modelo (distribuciones de masa y temperatura del material circunestelar) por comparación con datos observacionales, a fin de inferir de ello los posibles ajustes requeridos en la teoría actualmente empleada.

Coca, S.; Rohrmann, R.

17

Discos de acreción circumplanares: Modelo de Co-acreción  

NASA Astrophysics Data System (ADS)

Los discos de acreción circumplanetarios precursores de los satélites regulares de los planetas gigantes, se pueden formar por cuatro mecanismos (Pollack y otros, 1991, In Uranus, Bergtralh, Miner y Mattews, Eds., p. 469, Univ. de Arizona Press, Tucson). En este trabajo estudiamos uno de tales mecanismos: el Modelo de Co-acreción. En dicho modelo, el disco circumplanetario se forma a partir de las colisiones mutuas entre planetesimales dentro de la esfera de Hill del planeta durante el proceso de formación planetaria. Realizamos un modelo semi-analítico para calcular la masa del disco y compararla con la masa requerida para formar los satélites regulares de los planetas gigantes. Hemos obtenido una cota superior para la masa del disco que resulta inferior a la masa de los satélites más grandes de los planetas gigantes. En principio, estos resultados permitirían descartar el modelo de co-acreción como uno de los procesos que podrían dar lugar a la formación de los satélites regulares. Estos resultados permiten obtener restricciones en el escenario de formación planetaria y en los mecanismos de formación de sistemas de satélites.

Parisi, M. G.; de Elía, G.

18

Simulacao de aprendizado em teoria dos jogos aplicando modelos  

Microsoft Academic Search

Nos jogos repetidos com dois jogadores, pode- se escolher as chamadas estrategias mistas. Pesquisadores tem estudado os processos de aprendizado neste tipo de jogos, a saber, Fuden- berg, Quaegheber e de Cooman, entre outros. Serao apresentadas simulacoes de duas aborda- gens de aprendizado para jogos repetidos de dois jogadores: uma com modelo preciso de Dirich- let (MPD) e outra com

Lu ´ õs; H. de Santana; Francisco Ramos

19

TRIBUTO A HERMES - UM ESTUDO EMPÍRICO SOBRE O CONTEÚDO DAS MISSÕES DAS EMPRESAS COM BASE NO MODELO DE GESTÃO ECONÔMICA  

Microsoft Academic Search

The objective of this research is to empirically ve rify how companies show their strategic objectives through the mission statements. The cont ent analysis tool has been used in order to study the mission statements of 22 corporate govern ance differentiated companies. The results of this paper indicate that, as in literature, ther e is no consensus about what should

CECÍLIA MORAES SANTOSTASO; GUILLERMO OSCAR BRAUNBECK

20

Modelos estocásticos de aprendizaje en ensayos de respuesta dicotómica y un número finito de estados absorbentes  

Microsoft Academic Search

En este trabajo se construye un modelo probabilístico para representar un proceso de aprendizaje en el contexto de los modelos de estado en la denominada teoría matemática del aprendizaje. El modelo in- cluye tanto el proceso de adquisición como el de olvido, así como el supuesto de que el proceso pue - de terminar en uno cualquiera de r estados.

Carmen Santisteban Requena

2000-01-01

21

Un modelo general de eyección de materia estelar  

NASA Astrophysics Data System (ADS)

Posiblemente, la más directa y dramática evidencia de la pérdida de masa por parte de diferentes objetos astrofísicos la constituye el fenómeno de eyección persistente de materia. En el caso particular de las estrellas, las características y los mecanismos que impulsan a sus atmósferas externas hacia el medio interestelar varían a lo largo del diagrama evolutivo. En parte por este motivo, en parte por las dificultades matemáticas involucradas, es muy difícil elaborar un modelo que pueda dar cuenta de los diferentes mecanismos que originan e impulsan el viento estelar. Cabe entonces preguntarse si es posible desarrollar un único modelo en el que estos mecanismos puedan ser considerados (y variados) como parámetros externos que responden a las características de cada región de la secuencia evolutiva. La respuesta es que, en función de la geometría del campo electromagnético involucrado, todo depende de la simetría del problema. En este trabajo se presenta el análisis detallado de una de tales simetrías, discutiendo en particular los resultados obtenidos a la luz de las observaciones disponibles.

Rotstein, N. O.

22

Análisis de la dificultad de un test de matemáticas mediante un modelo componencial1  

Microsoft Academic Search

En este trabajo se delimitan los componentes de dificultad que intervienen en la resolución de los ítems de un test de matemáticas que incluye 66 ítems de operaciones con números enteros positivos y negativos. Se estudia el ajuste al modelo de Rasch y se estiman los parámetros de dificultad de los componentes mediante el modelo LLTM de Fischer. Se retuvieron

Eulogio Real; Julio Ole; Vicente Ponsoda; Javier Revuelta; Francisco J. Abad

1999-01-01

23

Contrastación del modelo de in versión de Rusbult en una muestra de casados y divorciados  

Microsoft Academic Search

Este estudio examina la capacidad del modelo de in versión propuesto por Rusbult para diferenciar en - tre individuos en relaciones estables e individuos en relaciones inestables, así como la capacidad de las variables del modelo (satisfacción matrimonial, in versión y relaciones alternati vas) para predecir el compromiso y la estabilidad de las relaciones matrimoniales. Los datos sobre las varia

David Martínez-Íñigo

2000-01-01

24

Tumores experimentais do sistema nervoso central: padronização de modelo em roedores utilizando a linhagem 9L  

Microsoft Academic Search

RESUMO - Grande variedade de modelos experimentais foram estabelecidos em neuro-oncologia durante as últimas décadas, a fim de estudar a biologia tumoral e a eficiciência de novas drogas e novos tratamentos em gliomas malignos humanos. Embora estes modelos estejam bem caracterizados e sejam facilmente reproduzíveis e aplicáveis, há limitações quanto ao seu uso e à resposta obtida, principalmente quando utilizados

Custódio Michailowsky; Flavio Key Niura; Ângela C. do Valle; Shigueko Sonohara; Thales D'Alessandro Meneguin; Ana Maria C. Tsanaclis

2003-01-01

25

Um Projeto de Intervenção nos Espaços de Exposições do Planetário do Parque do Ibirapuera  

NASA Astrophysics Data System (ADS)

Cada vez mais a humanidade, em sua imensa maioria, está alheia às próprias conquistas. A insatisfação com esta realidade tem levado muitos pesquisadores, instituições, empresas e governos a procurar formas alternativas de acompanhar e transmitir todo este acervo científico cultural à sociedade, buscando a melhoria da qualidade da divulgação científica e contribuindo para o processo de cultura e alfabetização científica. Não há tempo nem espaço nos limitados planos curriculares do ensino médio e mesmo nos programas de ensino que propiciem a cultura científica e o acompanhamento do vertiginoso progresso científico e tecnológico atual. Neste sentido, a educação formal escolar precisa ser complementada ou acrescida de uma educação informal, extra-escolar, que possa oferecer à sociedade o que a escola não pode oferecer. A interação do público com museus, feiras de ciências, planetários, exposições científicas e/ou culturais é de grande importância para a aquisição e difusão de conhecimentos relacionados ao mundo científico. Reconhecidamente como um modelo de alfabetização científica esses ambientes promovem uma interação social capaz de propiciar de forma efetiva uma melhor relação ensino-aprendizagem com o público. Partindo desta realidade a Universidade Cruzeiro do Sul e a Escola Municipal de Astronomia (EMA) vêm desenvolvendo um projeto de intervenção no espaço em torno do Planetário do Parque do Ibirapuera com o objetivo de se implantar um ambiente de aprendizagem motivador e desafiador que promova a popularização de conteúdos relacionados à astronomia, astrofísica e cosmologia. Busca-se, também, a aproximação e interação do público com exposições que estão sendo implementadas no planetário. Considerando que se trata de um projeto de mestrado em fase inicial o objetivo do presente trabalho é apresentar a concepção básica e os critérios que estão sendo utilizados do ponto de vista pedagógico para as indicações dos objetos e experimentos que serão expostos, procurando formas de construir, expor e apresen! tá-los d e maneira mais eficiente em termos de uma aprendizagem significativa. (Apoio: Fundação Vitae, CNPq)

Elias, D. S.; Amaral, L. H.; de Araújo, C. F., Jr.; Matsuura, O. T.; Voelzke, M. R.

2005-08-01

26

Caxingo - um modelo promissor para integracao de acampamentos de obras hidreletricas as comunidades locais. (Caxingo - a promising model for integrating the hydroelectric work camps to the site communities).  

National Technical Information Service (NTIS)

The social and economical impacts caused by the hydroelectric work camps in the sites where the hydroelectric will be constructed are studied, analysing the great supply of works when the hydroelectric is been constructed face to the reduction one when th...

A. M. Luna A. A. Falcao

1989-01-01

27

A Baroclinic Model of Two Layers for Use in Numerical Weather Forecasting Um Modelo Baroclinico de Duas Camdas Para USO Em Previsao Numerica de Tempo.  

National Technical Information Service (NTIS)

A primitive equation limited area baroclinic model is discussed. The primitive equations, in the flux form, are written in sigma coordinate form for a two layer atmospheric model. This is to be the first multilevel model to be tested systematically in ord...

R. P. Dossantos Y. Yamazaki M. A. M. Lemes P. Satyamurty S. H. Franchito

1982-01-01

28

TVI: Um Modelo Numerico Para Estimativa Global DA Fitomassa DOS Cerrados Brasileiros (TVI: A Mathematical Model for Global Estimation of Brazilian Cerrado Phytomass).  

National Technical Information Service (NTIS)

The main objective is to discuss the Transformed Vegetation Index (TVI) potentialities to estimate the cerrado phytomass. The ground and remote sensing data (thematic mapper/LANDSAT-5) were gathered on three selected areas: Roncador Ecological Reserve (IB...

J. R. Dossantos

1989-01-01

29

Condições econômicas e institucionais do processo de inovação: proposta de um modelo sistêmico de investigação do progresso tecnológico e o desenvolvimento de inovações na indústria  

Microsoft Academic Search

This paper analyzes the dynamics of innovation in the economy. Thus, it examines the economic and social conditions involved in the technological progress and promotion of innovations. The economic structure is seen in front of the company's innovative features and the accumulation of capabilities dedicated to the innovation. The social conditions are considered in respect of the role of institutions

Ronivaldo Steingraber; Flávio Gonçalves

2009-01-01

30

The Application of Remote Sensors to a Model for Fish Mapping O Sensoriamento Remoto Aplicado a Um Modelo de Cartas de Pesca.  

National Technical Information Service (NTIS)

A methodology for the determination of the best potential fishing zones, for sardines, in the Brazilian coastal area of the southwestern tropical Atlantic Ocean, between latitudes 21 deg 45'S and 25 deg 00'S and longitudes 40 deg 50'W and 47 deg 00'W is p...

S. Maluf

1978-01-01

31

Efeito tópico de iodo-povidona 0,5% comparado com natamicina 5% em ceratites fúngicas causadas por Fusarium solani em um modelo animal de coelhos: estudo piloto  

Microsoft Academic Search

Purpose: To evaluate the efficacy of topical administration of 0.5% povidone-iodine in experimental Fusarium solani keratitis in rabbits. Methods: Fungal keratitis caused by Fusarium solani was induced in the right eye of 24 New Zealand rabbits. The rabbits were randomly divided into 3 different treatment groups: Group I (povidone-iodine) - treated with topical 0.5% povidone-iodine; Group II (natamycin) - treated

Lauro Augusto de Oliveira; Thales Takeo Takata; Olga Fischman Gompertz; Luciene Barbosa de Sous; Mark J. Mannis

32

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

NASA Astrophysics Data System (ADS)

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

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

1987-05-01

33

Selección de características usando modelo híbrido Selección de características usando modelo híbrido basado en algoritmos genéticos basado en algoritmos genéticos Feature selection using a genetic algorithm-based hybrid approach  

Microsoft Academic Search

RESUMEN En el artículo se propone un modelo híbrido de selección de características con el objeto de reducir la dimensión del espacio de entrenamiento, sin comprometer la precisión de clasificación. El modelo incluye la inducción de un árbol de decisión que genera subconjuntos de características, para las cuales seguidamente se evalúa su relevancia mediante el criterio del mínimo error de

Luis Felipe Giraldo; Edilson Delgado Trejos; Juan Carlos Riaño; Germán Castellanos Domínguez

34

El mobbing como modelo de relaciones laborales en la Banca japonesa en España  

Microsoft Academic Search

Este artículo analiza cómo ciertos modelos empresariales de culturas tradicionales y fuertemente jerarquizadas como la japonesa, junto a factores de globalización, competitividad, fusiones o crisis económica, son el caldo de cultivo para que el acoso psicológico se institucionalice y forme parte de la cultura de empresa y de las relaciones laborales. El análisis se ha realizado en uno de los

Martínez García

35

La relación intrafamiliar en entornos empresariales. Incursión a un modelo de diagnóstico  

Microsoft Academic Search

La presente investigación tomó como base la información de 17 empresas familiares, con el Þ n de plantear un modelo que valora la relación intrafamiliar en familias propietarias de empresas, con el propósito de diagnosticar cuáles son las variables que más afectan las relaciones entre los miembros que componen el grupo familiar en entornos empresariales y, de acuerdo con ello,

MELQUICEDEC LOZANO POSSO

2006-01-01

36

Modelización participativa para la evaluación integrada de la sostenibilidad de los recursos hídricos: el Modelo del Mundo Celular y el Proyecto Matisse  

Microsoft Academic Search

El presente trabajo describe el proceso participativo vinculado al desarrollo y la implementación del prototipo de un modelo que tiene como principal objetivo servir de soporte durante el procesos de Evaluación Integrada de la Sostenibilidad (EIS) de diferentes opciones políticas de gestión de los recursos hídricos a diferentes niveles de acción. El modelo – llamado el Modelo\\u000adel Mundo Celular

J. David Tàbara; Bodil Elmqvist; Ilhan Akgun; Cristina Madrid; Lennart Olson; Michel Schilperoord; Pieter Valkering; Patrick Wallman; Paul Weaver

1970-01-01

37

Estudio de la formación de galaxias espirales en un modelo de agregación jerárquica  

NASA Astrophysics Data System (ADS)

El estudio de formación de galaxias espirales ha llevado al desarrollo de numerosos modelos teóricos (e.g. White & Rees 1978). En la actualidad, el modelo más aceptado predice la formación de una galaxia espiral a partir del colapso disipativo del gas en el pozo de potencial de un halo oscuro, conservando su momento angular específco (Fall & Efstathiou 1980). En los últimos años, ha sido posible realizar simulaciones numéricas hidrodinámicas, las cuales describen la evolución conjunta de la materia oscura y los bariones. Estos experimentos han señalado la dificultad de formar estructuras discoidales con propiedades consistentes con las observaciones, en modelos de agregación jerárquica. El problema principal se origina en la pérdida catastrófica de momento angular de la componente disipativa, durante el proceso de ensamblaje de los objetos, a través de la fusión de subestructura (Navarro & Steinmetz 1997). Estos experimentos no incluían procesos de formación estelar. En este trabajo, se expondrán resultados de simulaciones hidrodinámicas cosmológicas, incluyendo formación estelar (Tissera et al 1997), donde ha sido posible reproducir objetos discoidales con contrapartida observacional. El elemento fundamental ha sido la formación de bulbos estelares, los cuales han evitado la pérdida catastrófica de momento angular de los bariones. Se encontró que los discos exponenciales puramente gaseosos son altamente inestables y suceptibles de generar barras, responsables de la pérdida de momento angular y la caída violenta del gas hacia la región central. Estas inestabilidades son fácilmente inducidas durante interacciones y fusiones con objetos vecinos (Barnes & Hernquist 1996). Un bulbo estelar (o un objeto masivo y compacto) estabiliza el disco ante perturbaciones externas, asegurándole un potencial simétrico (Sellwood & Moore 1998, Van der Bosch 1998). En este caso, el gas en el disco no pierde completamente su momento angular intrínseco durante las fusiones, sino que, las sobrevive aportando una contribución distinta de cero, a partir de la cual el disco se regenera acretando en una segunda etapa, gas del halo de acuerdo al modelo tradicional de Fall & Efstathiou.

Tissera, P.; Saiz, A.; Dominguez-Tenreiro, R.

38

Configurable multi-layer CNN-UM emulator on FPGA  

Microsoft Academic Search

A new emulated digital multi-layer CNN-UM chip architecture called Falcon has been developed. In this paper the main steps of the FPGA implementation are introduced. Main results are as follows: CNN-UM architecture emulated on Xilinx Virtex series FPGA, 3D non-linear spatio-temporal dynamics can be implemented on this architecture. The critical parameters of the implementation in single layer configuration are 55

ZOLTAN NAGY; PETER SZOLGAY

2002-01-01

39

Configurable multilayer CNN-UM emulator on FPGA  

Microsoft Academic Search

A new emulated digital multilayer cellular neural network (universal machine (CNN-UM) chip architecture called Falcon has been developed. In this brief, the main steps of the field-programmable gate array (FPGA) implementation are introduced. The main results are as follows. The CNN-UM architecture emulated on Xilinx Virtex series FPGA, three-dimensional nonlinear spatio-temporal dynamics can be implemented on this architecture. The critical

Zoltán Nagy; Péter Szolgay

2003-01-01

40

Investigações Matemáticas na Sala de Aula: Um Projecto Colaborativo1  

Microsoft Academic Search

Este artigo apresenta o trabalho levado a cabo por um grupo colaborativo envolvendo professores de Matemática e investigadores com o objectivo de (i) desenvolver tarefas susceptíveis de desafiar os alunos a fazerem investigações matemáticas e (ii) estudar os problemas que a realização desse tipo de aulas coloca aos professores. Dá-se uma perspectiva geral do trabal ho realizado e apresenta -se

Hélia Oliveira; Irene Segurado; João Pedro da Ponte; Maria Helena Cunha

41

BLAST sources at 250, 350 and 500um (Devlin+, 2009)  

NASA Astrophysics Data System (ADS)

Submillimetre surveys during the past decade have discovered a population of luminous, high-redshift, dusty starburst galaxies. In the redshift range 1 less than or equal to z less than or equal to 4, these massive submillimetre galaxies go through a phase characterized by optically obscured star formation at rates several hundred times that in the local Universe. Half of the starlight from this highly energetic process is absorbed and thermally re-radiated by clouds of dust at temperatures near 30K with spectral energy distributions peaking at 100um in the rest frame. At 1 less than or equal to z less than or equal to 4, the peak is redshifted to wavelengths between 200 and 500um. The cumulative effect of these galaxies is to yield extragalactic optical and far-infrared backgrounds with approximately equal energy densities. Since the initial detection of the far-infrared background (FIRB), higher-resolution experiments have sought to decompose this integrated radiation into the contributions from individual galaxies. Here we report the results of an extragalactic survey at 250, 350 and 500um. Combining our results at 500 mum with those at 24um, we determine that all of the FIRB comes from individual galaxies, with galaxies at z greater than or equal to 1.2 accounting for 70% of it. As expected, at the longest wavelengths the signal is dominated by ultraluminous galaxies at z>1. (3 data files).

Devlin, M. J.; Ade, P. A. R.; Aretxaga, I.; Bock, J. J.; Chapin, E. L.; Griffin, M.; Gundersen, J. O.; Halpern, M.; Hargrave, P. C.; Martin, P. G.; Mauskopf, P.; Moncelsi, L.; Netterfield, C. B.; Ngo, H.; Olmi, L.; Pascale, E.; Patanchon, G.; Rex, M.; Scott, D.; Semisch, C.; Thomas, N.; Truch, M. D. P.; Tucker, C.; Tucker, G. S.; Viero, M. P.; Wiebe, D.

2011-11-01

42

An automatic tool to design CNN-UM programs  

Microsoft Academic Search

Programs for the Cellular Neural Network - Universal Machine are usually designed explicitly, and there is no method to create them automatically. In this paper we present a tool, based on a genetic approach, capable of determining what CNN templates compose a CNN-UM program performing a given image processing task, and in which order they must be applied to the

Giovanni Egidio Pazienza; K. Karacs

2007-01-01

43

Orígen del deterioro del medio ambiente en Taiwan: Desajuste entre el modelo de desarrollo y la dotación de recursos naturales  

Microsoft Academic Search

De igual modo que el análisis de los llamados nuevos países industriales asiáticos (NPIAs) abre interesantes matices en el campo de las teorías del desarrollo, poniendo en duda la capacidad explicativa de los enfoques tanto dependentista como neoclásico, el estudio del medio ambiente en esos países aporta visiones nuevas y enriquecidas en lo referente a sus modelos de desarrollo. En

Antonio Rodríguez Carmona

1994-01-01

44

Un nuevo estudio de terapias dirigidas para cáncer de mama establece un modelo de estudios clínicos a nivel mundial  

Cancer.gov

Dos medicamentos dirigidos, diseñados para tratar una forma agresiva de cáncer de seno o mama, están siendo probados en un estudio nuevo que incluye a 8 000 participantes en 50 países de seis continentes. Éste será un estudio clínico que los investigadores esperan proporcionará un nuevo modelo para la investigación del cáncer a nivel mundial. Preguntas y respuestas

45

Samuel Huntingtons demokratische Wellen — viel Lärm um Gischt?  

Microsoft Academic Search

Zusammenfassung  In Vorausschau auf den DVPW-Kongress zum Thema, Politik — Wissenschaft — Öffentlichkeit‘ stellt sich die Frage nach der Beziehung\\u000a zwischen wissenschaftlichem und öffentlichem Erfolg politologischer Arbeit. Samuel Huntingtons im Fach vielzitiertes, aber\\u000a auch bei einem breiteren Publikum höchst erfolgreiches Werk über die so genannte, Dritte Welle‘ der Demokratisierung wird\\u000a hier exemplarisch analysiert, um seinen Erfolgsbedingungen nachzuspüren. Die Analyse erweist, dass

Ruth Zimmerling

2003-01-01

46

A 1.29 um2 full CMOS ultra-low power SRAM cell with 0.12 um spacer-on-stopper (SOS) CMOS technology  

Microsoft Academic Search

We have developed a 1.29 um2 full CMOS SRAM cell for low power applications, which is the world-smallest one by using 0.12 um single gate CMOS technology and optical enhancement techniques for extending use of 248 nm KrF lithography. It includes (1) 0.28 um pitch contacts formed by aerial image controlled patterns on phase shift mask (PSM) and photo resist

Sung-Bong Kim; Do-Hyung Kim; Kwang-Ok Koh; Yong Park; Han-Shin Lee; Jai-Kyun Park; Joon-Yong Joo; Jin-Ho Kim; Byung-Joon Hwang; Moo-Sung Kim; Ji-Young Lee; Suk-Joo Lee; Seung-Hyun Park; Jung-In Hong; Moon-Yong Lee

2001-01-01

47

Efetividade no Ensino Superior Brasileiro: Aplicacao de Modelos Multin´õvel ` A Analise dos Resultados do Exame Nacional de Cursos  

Microsoft Academic Search

Este estudo tem por objetivo analisar o impacto de caracter´õsticas institucionais sobre o desempenho dos alunos no Exame Nacional de Cursos (Provao). Uma amostra de mais de 74.000 alunos dasareas de Administracao, Direito e Engenharia Civil que realizaram os exames no ano de 2000 foi analisada. Foram estimados modelos multin´õvel, pois estes dados apresentam uma n´õtida estrutura hierarquica. Relativamente aos

Maria Dolores Montoya Diaz

2007-01-01

48

Um estudo espectrofotométrico da variável cataclísmica V3885 Sgr  

NASA Astrophysics Data System (ADS)

Variáveis Cataclísmicas são sistemas binários cerrados compostos de uma anã vermelha que transfere matéria para uma anã branca, em sistemas não magnéticos ocorre a formação de um disco de acresção em torno da anã branca. V3885 Sgr é uma variável cataclísmica classificada como sendo do tipo nova-like. É apresentado um estudo espectrofotométrico de V3885 Sgr de alta resolução temporal feito na região do visível. A região observada é centrada em Ha e abrange também a linha de HeI 6678. O primeiro resultado obtido neste estudo é a determinação do período orbital a partir de medidas da velocidade radial da linha de Ha como sendo 0,20716071(22) dias, resolvendo inconsistências quanto a esse valor na literatura e definindo uma efeméride a longo prazo para o sistema. Com este período e as medidas de velocidade radial do perfil de linha de Ha foi construído um diagrama de massas, através do qual restringimos as massas das componentes estelares do sistema e limitamos a inclinação orbital do sistema. Foram construídos diagramas de Greenstein para as linhas de Ha e HeI, onde os espectros médios em cada intervalo de fase são representados lado a lado em escala de cinza, indicando a existência de uma emissão intensa proveniente da parte posterior do disco. A partir da tomografia Doppler obtivemos perfis de emissividade radial para o disco tanto para a linha de Ha como para HeI. Os resultados obtidos são comparados com os de outros sistemas estudados com a mesma técnica. Serão apresentados também resultados da tomografia de flickering para o sistema.

Ribeiro, F. M. A.; Diaz, M. P.

2003-08-01

49

XMM survey of 12um selected galaxies (Brightman+, 2011)  

NASA Astrophysics Data System (ADS)

We present an X-ray spectral analysis of 126 galaxies of the 12um galaxy sample (Rush et al. 1993, Cat. VII/157). By studying this sample at X-ray wavelengths, we aim to determine the intrinsic power, continuum shape and obscuration level in these sources. We improve upon previous works by the use of superior data in the form of higher signal-to-noise ratio spectra, finer spectral resolution and a broader bandpass from XMM-Newton. We pay particular attention to Compton thick active galactic nucleus (AGN) with the help of new spectral fitting models that we have produced, which are based on Monte Carlo simulations of X-ray radiative transfer, using both a spherical and torus geometry, and taking into account Compton scattering and iron fluorescence. (8 data files).

Brightman, M.; Nandra, K.

2011-11-01

50

Um modelo computacional para determinacao de alternativas de expansao de custo minimo em planejamento de sistemas de transmissao. (A computational model for determining the minimal cost expansion alternatives in transmission systems planning).  

National Technical Information Service (NTIS)

A computational model for determining an economical transmission expansion plan, based in the decomposition techniques is presented. The algorithm was used in the Brazilian South System and was able to find an optimal solution, with a low computational re...

L. M. V. Pinto M. V. F. Pereira A. Nunes

1989-01-01

51

EDUCAÇÃO FÍSICA ESCOLAR E INTERDISCIPLINARIDADE NO ENSINO: REFLEXÕES E UM MODELO APLICÁVEL NAS ESCOLAS PHYSICAL EDUCATION IN SCHOOLS AND INTERDISCIPLINARITY IN TEACHING-APPRENTICESHIP PROCESS: REFLECTIONS AND AN ACCOMPLISHABLE MODEL TO BE FOLLOWED BY SCHOOLS  

Microsoft Academic Search

This work had as its main objective identify aspects related to the interdisciplinary process focused on the Physical Education in the schools through a bibliographical review and evaluate its participation in the educational pedagogy constitution, reflecting the real needs of this area, the role of the interdisciplinarity and its contribution to teaching-apprenticeship process, that uses this strategy as a base

JOAQUIM ROBERTO PICCIGUELLI; ROSINEIDE MARQUES RIBAS; MARINA FERREIRA DE SOUZA ANTUNES

52

Immunosuppressive and remodelling properties of mesenchymal stem cells in a model of chronic kidney disease Papel imunossupressor e remodelador das células-tronco mesenquimais em um modelo experimental de doença renal crônica  

Microsoft Academic Search

Objective: To investigate the role of mesenchymal stem cells in fibrogenesis using a model of chronic renal insufficiency. Methods: Mesenchymal stem cells were obtained from tibias and femurs of Wistar-EPM rats. After three to five passages, the cells were submitted to phenotypic analyses and differentiation. Wistar rats were submitted to the 5\\/6 nephrectomy model, and 2.10 5 mesenchymal stem cells

Patricia Semedo; Matheus Corrêa-Costa; Marcos Antonio Cenedeze; Denise Maria; Avancini Costa Malheiros; Maria Heloisa Massola Shimizu; Antonio Carlos Seguro; Alvaro Pacheco-Silva; Niels Olsen; Saraiva Câmara

2009-01-01

53

Calibracao de um fotometro de chama micronal modelo B-260. Intercomparacao de resultados analiticos de potassio. (Calibration of a Micronal flame photometer model B-260. Intercomparison of the analytical results for potassium).  

National Technical Information Service (NTIS)

In its environmental monitoring program, NUCLEBRAS analyzes systematically environmental samples in order to determine the total alpha and beta activities. In most of these samples, (sup 40) K is present in measurable quantities and can therefore be used ...

L. M. L. Alencar R. C. R. Dalston

1983-01-01

54

SWATCHP: Um Modelo para a Simulacao Continua de Processos Hidrologicos num Sistema Vegetacao-Solo-Aquifero-Rio (SWATCHP: A Model for the Continuous Simulation of the Hydrologic Processes in a Vegetation-Soil-Aquifer-Stream System).  

National Technical Information Service (NTIS)

A mathematical model (SWATCHP) for the continuous simulation of hydrologic processes is presented. The model is classified as a deterministic, physically based, distributed and a continuous one. The model simulates many of the hydrologic processes at the ...

P. G. M. de Melo Matias

1992-01-01

55

Genotyping of 73 UM-SCC head and neck squamous cell carcinoma cell lines  

PubMed Central

Background We established multiple UM-SCC (University of Michigan Squamous Cell Carcinoma) cell lines. With time, these have been distributed to other labs all over the world. Recent scientific discussions have noted the need to confirm the origin and identity of cell lines in grant proposals and journal articles. We genotyped the UM-SCC cell lines in our collection to confirm their unique identity. Design Early passage UM-SCC cell lines were genotyped and photographed. Results Thus far, 73 unique head and neck UM-SCC cell lines (from 65 donors including 21 lines from 17 females) were genotyped. In 7 cases separate cell lines were established from the same donor. Conclusions These results will be posted on the U of M Head and Neck SPORE Tissue Core website for other investigators to confirm that the UM-SCC cells used in their laboratories have the correct features. Publications using UM-SCC cell lines should confirm the genotype.

Brenner, J. Chad; Graham, Martin P.; Kumar, Bhavna; Saunders, Lindsay M.; Kupfer, Robbi; Lyons, Robert H.; Bradford, Carol R.; Carey, Thomas E.

2011-01-01

56

A high performance active pixel sensor with 0.18um CMOS color imager technology  

Microsoft Academic Search

A high performance 0.18 um CMOS image sensor technology has been successfully developed and fully characterized. 3T active pixel sensor (APS) with non-silicide source\\/drain process is provided to reduce dark current and increase photoresponse. By optimizing photodiode junction profile with the appropriate thermal cycle, the dark current can be drastically reduced. Small pixel pitch 2.8um~4.0um demonstrates the low dark current

Shou-Gwo Wuu; Ho-Ching Chien; Dun-Nian Yaung; Chien-Hsien Tseng; C. S. Wang; Chin-Kung Chang; Yu-Kung Hsaio

2001-01-01

57

The UM/CTIO Magellanic Cloud Emission-line Survey  

NASA Astrophysics Data System (ADS)

The interstellar medium (ISM) is no longer thought to be a quiescent distribution of gas, but rather a dynamic and complex interaction of the ambient gas and dust with stellar winds, HII regions, planetary nebulae (PNe), supernovae (SNe), supernova remnants (SNRs), superbubbles, and gigantic supershells. Nowhere is this more apparent than in images of the ionized gas in the Magellanic Clouds. Their relative proximity and low extinction make them the ideal laboratories in which to study the ionized component of the ISM, its constituents, its energetics, and its interaction with the underlying stellar populations. We have begun an optical emission-line survey of these two nearby galaxies, the UM/CTIO Magellanic Cloud Emission-line Survey (MCELS). Together with parallel surveys at other wavelengths, it will provide the foundation upon which to build a deeper understanding of the ISM in the Clouds (and other galaxies), from small scales (~ 1 pc) to global scales. Taking advantage of the wide field of view of the UM/CTIO Curtis Schmidt telescope coupled to the sensitivity and large area of a STIS 2K CCD, we will obtain H alpha, [S II], and [O III] images of the central 8x8 degrees of the Large Magellanic Cloud and of the central 3.5 x 4.5 degrees of the Small Magellanic Cloud, covering most of the gaseous extent of both Clouds with a resolution of ~ 4". Survey observations began in November 1995, and we have completed approximately 75% of the imaging as of the end of the 1997/1998 Cloud season. The survey will provide definitive samples of wind-blown bubbles, PNe, and SNRs, as well as detailed and calibrated emission-line observations of HII regions, superbubbles, and supergiant shells. We will discuss the scientific objectives of the survey, describe the survey parameters and strategies, and present some of the recent results from analysis of preliminary datasets. Furthermore, we will describe the plans for making the digital Emission-line Atlas of the Magellanic Clouds publically available, providing a rich, homogeneous dataset to serve as the groundwork for further investigations into all aspects of the ISM, well beyond the scope of our own work.

Smith, R. C.; MCELS Team

58

Desempenho de um trator operando em solo com diferentes tipos de cobertura vegetal  

Microsoft Academic Search

RESUMO: A eficiência de um trator para desenvolver esforço tratório depende da interação entre o rodado e o solo, envolvendo um complexo conjunto de fatores: característica do rodado, patinagem, transferência de peso do trator, tipo de solo, umidade, estado de compactação, tipo de cobertura do solo, entre outros, que proporcionam diferentes condições de trabalho e interferem no desempenho do trator.

Antonio Gabriel Filho; Suedêmio de L. Silva; Alcir J. Modolo; João C. M. da Silveira

2004-01-01

59

EFICIÊNCIA DO MODELO CERES-MAIZE NA PREDIÇÃO DA PRODUTIVIDADE DE MILHO EM ÁREAS COM PRESENÇA DE VARIABILIDADE ESPACIAL Ceres-Maize model efficiency in corn yield prediction within spatial variable areas  

Microsoft Academic Search

RESUMO Modelos são utilizados para a simulação do crescimento de plantas como ferramentas na otimização das práticas de manejo, bem como para estimar produtividades. Com este estudo objetivou-se testar a eficiência do modelo CERES-maize na estimação da produtividade de milho, em função da variabilidade espacial presente na área. Foram instaladas no Campus da UFLA parcelas experimentais em áreas variáveis segundo

Sandro Manuel Carmelino Hurtado; Carlos Maurício Paglis; Renzo Garcia Von Pinho

60

The UM/CTIO Magellanic Cloud Emission-line Survey  

NASA Astrophysics Data System (ADS)

The interstellar medium (ISM) is no longer thought to be a quiescent distribution of gas, but rather a dynamic and complex interaction of the ambient gas and dust with stellar winds, H ii regions, planetary nebulae (PNe), supernovae (SNe), supernova remnants (SNRs), superbubbles, and gigantic supershells. Nowhere is this more apparent than in the Magellanic Clouds. Their relative proximity and low extinction make them the ideal laboratories in which to study the ISM, its constituents, its energetics, and its interaction with the underlying stellar populations. We have begun an optical emission-line survey of these two nearby galaxies which, together with parallel surveys at other wavelengths, will provide the foundation upon which to build a deeper understanding of the ISM in the Clouds (and other galaxies), from small scales ( ~ 1 pc) to global scales. Taking advantage of the wide field of view of the UM/CTIO Curtis Schmidt telescope coupled to the sensitivity and large area of the newly available STIS 2K CCD, we will obtain H alpha, [S ii], and [O iii] images of the central 8(deg) x 8(deg) of the Large Magellanic Cloud and of the central 3.5(deg) x 4.5(deg) of the Small Magellanic Cloud, covering most of the gaseous extent of both Clouds. Survey observations began in November 1995, and we completed almost 30% of the imaging in the 1995-96 Cloud season. The survey will provide definitive samples of wind-blown bubbles, PNe, and SNRs, as well as detailed and calibrated emission-line observations of HII regions, superbubbles, and supergiant shells. We will discuss the scientific objectives of the survey, describe the survey parameters and strategies, and present some of the first images from the survey. Furthermore, we will describe the plans for making the digital Emission-line Atlas of the Magellanic Clouds publically available, providing a rich, homogeneous dataset to serve as the groundwork for further investigations into all aspects of the ISM, well beyond the scope of our own work.

Smith, R. C.; Bregman, J.; Chu, Y.-H.; Ciardullo, R.; Jacoby, G. H.; Kennicutt, R.; Oey, M. S.; Winkler, P. F.; Zaritsky, D.

1996-09-01

61

A Study of the Dynamics of Droughts in Northern Brazil: Observations, Theory, and Numerical Experiments with a Global Atmospheric Circulation Model Um Estudo Sobre a Dinamica das Secas Do Nordes Te Do Brasil: Observacoes, Teoria E Experimentos Numericos COM Um Modelo Global de Circulacao Atmosferica.  

National Technical Information Service (NTIS)

The monthly mean sea surface temperature anomalies over tropical Altantic and rainfall anomalies over two selected stations for 25 years (1948-1972) were examined. It is found that the most severe drought events are associated with the simultaneous occurr...

A. D. Moura J. Shukla

1980-01-01

62

Confusion-Limited 70um Imaging of the GOODS Hubble Deep Field North  

NASA Astrophysics Data System (ADS)

We propose confusion-limited MIPS 70um imaging of the GOODS Hubble Deep Field North (HDF-N). The goal of these observations is to determine the infrared properties of the highest redshift sources detectable by the MIPS on Spitzer. In particular, we will derive source counts at the faintest possible depths and measure the infrared luminosity function out to z~1.5. We will also measure the 70um/24um flux density ratios to constrain what fraction of the infrared background arises from infrared-cool, starburst dominated luminous infrared galaxies versus infrared-warm AGN. Ultraluminous infrared galaxies contribute significantly to the total star-formation at high-redshift and are expected to be detected at flux levels near the confusion limit of the MIPS-70 band. Due to the much lower than expected in-flight performance of the 70um detectors and the loss of over half the array due to cabling issues, the planned observations of the HDF-N by the MIPS-GTO team will not reach the confusion level or the depth required to detect high-redshift sources at 70um. We propose to observe the HDF-N field to the ultimate depth at 70um. These observations are motivated by the GOODS philosophy of obtaining the deepest possible images from NASA's Great Observatories (HST, Chandra, and Spitzer) and will greatly build upon our knowledge of the high-redshift universe by probing the far-infrared band to unprecedented depths.

Frayer, David; Chary, Ranga-Ram; Dickinson, Mark; Elbaz, David; Fadda, Dario; Henderson, David; Mobasher, Bahram; Surace, Jason; Teplitz, Harry; Yan, Lin

2004-09-01

63

Aspectos qualitativos das águas da bacia hidrográfica do rio de Contas no município de Jussiape - Bahia  

Microsoft Academic Search

This research is resulted of the qualitative classifications of the spring water of the municipal district of Jussiape, basin of the river of Bills, in the State of Bahia. The surface water of this basin drain in the sense NNW-SSE, middling distributed, the inundation is smaller in relation to the distribution of the drainage and of the smaller tributaries of

Sérgio Luiz; T. Nunes; M. J. M. Cruz; S. A. Nascimento

2007-01-01

64

Characterization of Human Laryngeal Primary and Metastatic Squamous Cell Carcinoma Cell Lines UM-SCC-17A and UM-SCC-17B1  

Microsoft Academic Search

The squamous cell carcinoma (SCC) cell lines UM-SCC-17A and -17B were derived, respectively, from the primary laryngeal cancer and a mctastatic neck tumor of a patient who failed to respond to radiation therapy but achieved long-term remission after surgery. The karyotypes of both cell lines and a subline of 17A were pseudodiploid and stable in multiple in vitro passages. Several

Thomas E. Carey; Daniel L. Van Dyke; Maria J. Worsham; Carol R. Bradford; V. Ramesh Babu; Donald R. Schwartz; Sandra Hsu; Shan R. Baker

1989-01-01

65

The evolution of type 1 AGN at 15um from the ELAIS  

Microsoft Academic Search

We present the first preliminary estimate of the evolution of type 1 AGNs at\\u000a15 um. A new sample of sources selected from the ELAIS-S1 survey has been used\\u000atogether with the RMS sample. The ELAIS-S1 survey covers an effective area of\\u000a2.2 deg^2 (total: 4 deg^2) down to 1.2 mJy at 15 um. Spectroscopic\\u000aidentifications have been carried out

F. La Franca; I. Matute; C. Gruppioni; D. Alexander

2000-01-01

66

High performance 0.25-um CMOS color imager technology with non-silicide source\\/drain pixel  

Microsoft Academic Search

A high performance 0.25 um CMOS image sensor technology has been developed to overcome device scaling and process issues. Non-silicide source\\/drain pixel (3 transistors, 3.3 um×3.3 um, fill factor: 28%) is provided to reduce dark current and increase photoresponse. By optimizing thermal oxide in STI structure, double ion implanted source\\/drain junction and using H2 annealing, the dark current can be

Shou-Gwo Wuu; Dun-Nian Yaung; Chien-Hsien Tseng; Ho-Ching Chien; Chung S. Wang; Yean-Kuen Hsiao; Chin-Kung Chang; B. J. Chang

2000-01-01

67

Manutenção da independência em idosos saudáveis: fórmula para um envelhecimento bem sucedido  

Microsoft Academic Search

1 realizou um interessante estudo na cidade de São Paulo que avaliou a expectativa de vida de homens e mulheres e os anos vividos com e sem incapacidade funcional. Ele chegou à conclusão que apesar da expectativa de vida das mulheres ser superior ao dos homens, elas apresentam maior proporção de anos vividos com incapacidade funcional. Chegar aos 90 anos,

Camargos MCS

68

Use of "um" in the Deceptive Speech of a Convicted Murderer  

ERIC Educational Resources Information Center

Previous studies have demonstrated a link between language behaviors and deception; however, questions remain about the role of specific linguistic cues, especially in real-life high-stakes lies. This study investigated use of the so-called filler, "um," in externally verifiable truthful versus deceptive speech of a convicted murderer. The data…

Villar, Gina; Arciuli, Joanne; Mallard, David

2012-01-01

69

COLONIZADOR E COLONOS: NA FRONTEIRA DA TERRA O LIMITE DOS SONHOS DE UM FUTURO PROMISSOR  

Microsoft Academic Search

RESUMO - O município de Alta Floresta- MT situado na Amazônia norte Mato- grossense foi colonizado na década de 70. Neste local, a colonizadora INDECO, encontrou as condições ideais para instalar um projeto que deveria assentar pequenos agricultores da região sul (colonos) que estavam enfrentando problemas nas suas terras de origem. Esse projeto foi construído sobre o tripé Educação \\/

ROSANE DUARTE ROSA; CLAILTON LIRA PERIN; ROSALVO DUARTE ROSA

70

Lensed QSO UM673/Q0142-100 VRi light curves (Ricci+, 2013)  

NASA Astrophysics Data System (ADS)

The Table contains the light curves, in the V, R, and i bands, of the two lensed components of the quasar UM673. The Table also contains the light curve of the "B+G" component, obtained by superposing the flux of the fainter B component and the flux of the lens galaxy. (1 data file).

Ricci, D.; Elyiv, A.; Finet, F.; Wertz, O.; Alsubai, K.; Anguita, T.; Bozza, V.; Browne, P.; Burgdorf, M.; Calchi Novati, S.; Dodds, P.; Dominik, M.; Dreizler, S.; Gerner, T.; Glitrup, M.; Grundahl, F.; Hardis, S.; Harpsoe, K.; Hinse, T. C.; Hornstrup, A.; Hundertmark, M.; Jorgensen, U. G.; Kains, N.; Kerins, E.; Liebig, C.; Maier, G.; Mancini, L.; Masi, G.; Mathiasen, M.; Penny, M.; Proft, S.; Rahvar, S.; Scarpetta, G.; Sahu, K.; Schaefer, S.; Schoenebeck, F.; Schmidt, R.; Skottfelt, J.; Snodgrass, C.; Southworth, J.; Thoene, C. C.; Wambsganss, J.; Zimmer, F.; Zub, M.; Surdej, J.

2013-02-01

71

Avaliação de Processo de um Programa de Manejo de Estresse Ocupacional The Process Evaluation of an Occupational Stress Management Program  

Microsoft Academic Search

Resumo Este artigo descreve metas intermediárias alcançadas e atitudes dos participantes frente a um programa de manejo de estresse ocupacional. Participaram 74 funcionários de uma universidade, dos quais 42 foram designados para uma intervenção multimodal de manejo de estresse e 32 para um treinamento em habilidades sociais. Os resultados, coletados por medidas observacionais, evidenciaram que as metas intermediárias foram alcançadas

Sheila Giardini Murta

72

On the Compact H II Galaxy UM 408 as Seen by GMOS-IFU: Physical Conditions  

Microsoft Academic Search

We present Integral Field Unit GMOS-IFU data of the compact H II galaxy UM 408, obtained at the Gemini South telescope, in order to derive the spatial distribution of emission lines and line ratios, kinematics, plasma parameters, and oxygen abundances as well the integrated properties over an area of 3''×4farcs4 equivalent with ~750 pc × 1100 pc located in the

Patricio Lagos; Eduardo Telles; Casiana Muñoz-Tuñón; Eleazar R. Carrasco; François Cuisinier; Guillermo Tenorio-Tagle; Guillermo

2009-01-01

73

Isoalantolactone Inhibits UM-SCC-10A Cell Growth via Cell Cycle Arrest and Apoptosis Induction  

PubMed Central

Isoalantolactone is a sesquiterpene lactone compound isolated from the roots of Inula helenium L. Previous studies have demonstrated that isoalantolactone possesses antifungal, anti-bacterial, anti-helminthic and anti-proliferative properties in a variety of cells, but there are no studies concerning its effects on head and neck squamous cell carcinoma (HNSCC). In the present study, an MTT assay demonstrated that isoalantolactone has anti-proliferative activity against the HNSCC cell line (UM-SCC-10A). Immunostaining identified that this compound induced UM-SCC-10A cell apoptosis but not necrosis. To explain the molecular mechanisms underlying its effects, flow cytometry and western blot analysis showed that the apoptosis was associated with cell cycle arrest during the G1 phase, up-regulation of p53 and p21, and down-regulation of cyclin D. Furthermore, our results revealed that induction of apoptosis through a mitochondrial pathway led to up-regulation of pro-apoptotic protein expression (Bax), down-regulation of anti-apoptotic protein expression (Bcl-2), mitochondrial release of cytochrome c (Cyto c), reduction of mitochondrial membrane potential (MMP) and activation of caspase-3 (Casp-3). Involvement of the caspase apoptosis pathway was confirmed using caspase inhibitor Z-VAD-FMK pretreatment. Together, our findings suggest that isoalantolactone induced caspase-dependent apoptosis via a mitochondrial pathway and was associated with cell cycle arrest in the G1 phase in UM-SCC-10A cells. Therefore, isoalantolactone may become a potential drug for treating HNSCC.

Wu, Minjun; Zhang, Hua; Hu, Jiehua; Weng, Zhiyong; Li, Chenyuan; Li, Hong; Zhao, Yan; Mei, Xifan; Ren, Fu; Li, Lihua

2013-01-01

74

Simultaneous Retrieval of Kinetic Temperature and CO2 Volume Mixing Ratio in the Mesosphere and Lower Thermosphere From Measurements of 15um and 4.3um Earth Limb Emission Under Non-LTE Conditions  

Microsoft Academic Search

The SABER instrument on TIMED will measure CO2 15um limb emission to approximately 120 km in altitude for the purpose of determining kinetic temperature (Tk). Because CO2 volume mixing ratio (vmr) departs from its well-mixed value in the mesosphere and lower thermosphere (MLT), CO2 vmr must be retrieved simultaneously with Tk. SABER will measure CO2 4.3um limb emission to 130

C. J. Mertens; M. G. Mlynczak; M. Lopez-Puertas; P. P. Wintersteiner; R. H. Picard; J. R. Winick; L. L. Gordley; J. M. Russell

2002-01-01

75

Spectral reflectance of carbonate minerals in the visible and near infrared (0.35-2.55 um): Anhydrous carbonate minerals  

Microsoft Academic Search

Reflectance spectroscopy in the visible and near infrared (0.35-2.55 um) offers a rapid, inexpensive, nondestructive technique for determining the mineralogy and gaining information on the minor element chemistry of carbonate minerals and rocks. Spectra of all commonly occurring anhydrous end-member carbonate minerals contain seven strong absorption bands at wavelengths >1.6 um due to vibrations of the carbonate radical. Positions, widths,

Susan J. Gaffey

1987-01-01

76

UM-EC-1, a New Hypodiploid Human Cell Line Derived from a Poorly Differentiated Endometrial Cancer1  

Microsoft Academic Search

The University of Michigan endomctrial carcinoma cell line UM-EC- 1 was derived from a poorly differentiated endometrial adenocarcinoma of a 66-yr-old white female. Cell cultures were started using both tumor expiants and a cell suspension obtained from collagenase-treated tumor tissue. The collagenase-derived cell suspension gave rise to monolayer cultures which grew rapidly from the outset. This subline of UM-EC-1 has

Seija E. Grenman; Daniel L. Van Dyke; Maria J. Worsham; Fernando del Rosario; James A. Roberts; Kenneth D. McClatchey; Donald R. Schwartz; V. Ramesh Babu; Thomas E. Carey

1988-01-01

77

A questionnaire-based (UM-PDHQ) study of hallucinations in Parkinson's disease  

PubMed Central

Background Hallucinations occur in 20–40% of PD patients and have been associated with unfavorable clinical outcomes (i.e., nursing home placement, increased mortality). Hallucinations, like other non-motor features of PD, are not well recognized in routine primary/secondary clinical practice. So far, there has been no instrument for uniform characterization of hallucinations in PD. To this end, we developed the University of Miami Parkinson's disease Hallucinations Questionnaire (UM-PDHQ) that allows comprehensive assessment of hallucinations in clinical or research settings. Methods The UM-PDHQ is composed of 6 quantitative and 14 qualitative items. For our study PD patients of all ages and in all stages of the disease were recruited over an 18-month period. The UPDRS, MMSE, and Beck Depression and Anxiety Inventories were used for comparisons. Results and Discussion Seventy consecutive PD patients were included in the analyses. Thirty-one (44.3%) were classified as hallucinators and 39 as non-hallucinators. No significant group differences were observed in terms of demographics, disease characteristics, stage, education, depressive/anxiety scores or cognitive functioning (MMSE) between hallucinators and non-hallucinators. Single mode hallucinations were reported in 20/31 (visual/14, auditory/4, olfactory/2) whereas multiple modalities were reported in 11/31 patients. The most common hallucinatory experience was a whole person followed by small animals, insects and reptiles. Conclusion Using the UM-PDHQ, we were able to define the key characteristics of hallucinations in PD in our cohort. Future directions include the validation of the quantitative part of the questionnaire than will serve as a rating scale for severity of hallucinations.

Papapetropoulos, Spiridon; Katzen, Heather; Schrag, Anette; Singer, Carlos; Scanlon, Blake K; Nation, Daniel; Guevara, Alexandra; Levin, Bonnie

2008-01-01

78

Uma Visão do Universo Segundo um Grupo de Alunos do Ensino Médio de São Paulo  

NASA Astrophysics Data System (ADS)

A astronomia, embora seja uma ciência popular, com inúmeras descobertas de interesse público, ainda é apresentada desconsiderando-se os aspectos históricos e científicos relacionados ao seu desenvolvimento, sendo geralmente veiculada nos meios de comunicação de maneira pouco esclarecedora e não raro com imprecisões. Neste trabalho analisou-se a concepção de um grupo de estudantes de Ensino Médio sobre conceitos de astronomia, visando identificar sua visão de mundo a respeito do Universo, envolvendo idéias sobre espaço e tempo. Para issso, foi aplicado um questionário em três escolas da grande São Paulo em um espaço amostral de 270 alunos. Constatou-se que, embora o ensino de astronomia esteja previsto nos PCNEM, os resultados obtidos na pesquisa mostram que há grande deficiência no conhecimento dos temas investigados. Nesse sentido, verificou-se que apenas 20% dos alunos eram capazes de relacionar a sucessão das semanas com as fases da lua, enquanto 28% associaram as estações do ano à inclinação do eixo de rotação da Terra. Por outro lado, somente 23% dos alunos tinham noções das distâncias entre os objetos celestes próximos da Terra e 56% conseguiram relacionar o Big Bang com a origem do Universo. Finalmente, constatou-se que 37% reconheciam o ano-luz como uma unidade de distância e 60% reconheciam o Sol como sendo uma estrela. Apesar de 60% dos alunos indicarem que a escola é a principal fonte para aquisição dos conhecimentos de astronomia, conclui-se que seus conceitos nessa área ainda são inadequados, havendo necessidade de ampliação e aprimoramento da abordagem desses conteúdos nos ambientes escolares.

Elias, D. S.; Araújo, M.; Amaral, L. H.; Voelzke, M. R.; Araújo, M.

2005-08-01

79

University AlbUM: A Digital Collection of University of Maryland Images  

NSDL National Science Digital Library

The Old Line State has long been home to a number of fine institutions of higher education, and the flagship public university is the University of Maryland in College Park. Their library system has been involved in creating a number of digital collections, and the impetus for this particular offering was the University's 150th anniversary celebration. Drawing on their broad archive of historical photographs, they have created the University AlbUM website to intrigue and entice those who might wish to learn a bit more about the University's past. Visitors to the site can browse the photographs via a set of themes, including "Sports", "Agriculture", "Campus + Buildings", "Events", and "People". Those persons with a temporal bent may wish to browse the photographs by decade to find documents such as minutes from the campus literary society and illustrations from various campus publications.

80

Um supressor de fundo térmico para a câmara infravermelha CamIV  

NASA Astrophysics Data System (ADS)

O ângulo sólido subtendido pelos pixels na câmara infravermelha do NexGal (CamIV) que operamos no OPD/LNA contém contribuições provenientes do sistema de coleta de fluxo propriamente dito - sendo esta a parte que interessa para as medidas astronômicas - e contribuições da obstrução central, sistema de suporte do espelho secundário e região exterior à pupila de entrada do telescópio. Estas últimas contribuições são devi-das à emissão de corpo negro à temperatura ambiente e aumentam exponencialmente para comprimentos de onda maiores que 2 micra (banda K, no infravermelho próximo). Embora a resultante pode ser quantificada e subtraída dos sinais relevantes, sua variância se adiciona à variância do sinal, e pode ser facilmente a contribuição domi-nante para a incerteza final das medidas, tornando ineficiente o processo de extração de informação e degradando a sensibilidade da câmara. A maneira clássica de resolver esse problema em sistemas ópticos que operam no infravermelho, onde os efeitos da emissão térmica do ambiente são importantes, é restringir o ângulo sólido subtendido pelos pixels individuais exclusivamente aos raios provenientes do sistema óptico. Para tanto, projeta-se uma imagem real, bastante reduzida, da pupila de entrada do sistema óptico num anteparo que transmita para o sistema de imageamento só o que interessa, bloqueando as contribuições das bordas externas à pupila de entrada, obstrução central do telescópio e sistema de suporte. Como a projeção é realizada em ambiente criogênico, a contribuição térmica espúria é efetivamente eliminada. Nós optamos por um sistema do tipo Offner para implementar na prática esta função. Trata-se de um sistema baseado em espelhos esféricos, bastante compacto e ajustado por construção. A opção por espelhos do mesmo material que o sistema de suporte (Alumínio) minimiza a dilatação diferencial, crítica nesse tipo de aplicação. Apresentamos as soluções detalhadas do projeto óptico-mecânico, bem como uma análise de flexões e desempenho em termos de qualidade de imagem.

Jablonski, F.; Laporte, R.

2003-08-01

81

Origin and characteristics of yardangs in the Um Al-Rimam depressions (N Kuwait)  

NASA Astrophysics Data System (ADS)

Although Arabia hosts one of the largest deserts in the world, studies regarding aeolian erosional features in general and yardangs in particular are rare. The principal aim of this study is to delineate and investigate the various forms of yardangs in the Um Al-Rimam depressions in the northern part of Kuwait. The study area consists of two main depressions connected by neck area made up of continental sediments. Both depressions are surrounded by a dissected escarpment and their floors host muddy playas. On lithological bases, three main types of yardang have been identified: 7 yardangs are sculptured in sandstones of Lower Fars Formation (Lower to Middle Miocene), 23 are carved in calcretic rocks of Ghar Formation (Oligocene to Lower Miocene), and 11 yardangs are developed in Quaternary sediments. Their mean orientation NW (297°) coincides with the prevailing direction of the strong local northwesterly wind called the shamal. The average length/width ratio is 1.5:1. The wide geographic distribution of yardangs around the margins of the northern depression is due to sand blasting. This is explained by the annual sand accumulation measured in the study area where the northern depression shows 143 times higher accumulation than the southern depression, the neck area and the platform above the depressions. Also, the field measurements for annual erosional rates show that the sides of the yardangs are more affected by erosion compared to their middle parts. Remarkably slight mineralogical variations were detected within the surface sediments of Um Al-Rimam depressions and the Quaternary muddy yardangs which indicate a common origin. The age of yardangs is unknown but annual erosional rates on a small Quaternary muddy yardang suggest that they range in age between 44 and 1500 years depending on yardang size. It is believed, as indicated from field observation and interpretation of aerial photos, that the majority of yardangs are pre-existing bedrock forms. These forms were developed by paleo-surface hydrological processes which were modified by wind action in latter phase.

Al-Dousari, Ali. M.; Al-Elaj, Maraheb; Al-Enezi, Eqbal; Al-Shareeda, Abdulaziz

2009-03-01

82

"Um, I Can Tell You're Lying": Linguistic Markers of Deception versus Truth-Telling in Speech  

ERIC Educational Resources Information Center

Lying is a deliberate attempt to transmit messages that mislead others. Analysis of language behaviors holds great promise as an objective method of detecting deception. The current study reports on the frequency of use and acoustic nature of "um" and "like" during laboratory-elicited lying versus truth-telling. Results obtained using a…

Arciuli, Joanne; Mallard, David; Villar, Gina

2010-01-01

83

"Um, I Can Tell You're Lying": Linguistic Markers of Deception versus Truth-Telling in Speech  

ERIC Educational Resources Information Center

|Lying is a deliberate attempt to transmit messages that mislead others. Analysis of language behaviors holds great promise as an objective method of detecting deception. The current study reports on the frequency of use and acoustic nature of "um" and "like" during laboratory-elicited lying versus truth-telling. Results obtained using a…

Arciuli, Joanne; Mallard, David; Villar, Gina

2010-01-01

84

Determinação da massa de júpiter a partir das órbitas de seus satélites: um experimento didático  

NASA Astrophysics Data System (ADS)

Este trabalho apresenta o roteiro piloto de uma prática observacional em astronomia, junto com os primeiros resultados obtidos nesta fase de implementacão. O projeto, que será executado em duas etapas, visa introduzir noções de Astronomia a alunos do Ensino Médio e iniciantes nos cursos de Física. O experimento consiste em medir as órbitas dos satélites Galileanos e, a partir da análise dos dados coletados, verificar a validade da Lei das órbitas de Kepler, determinando a massa do planeta Júpiter. Em uma primeira etapa, as observações serão feitas utilizando um telescópio Meade LX200 10" e câmera CCD para obter uma seqüência de imagens do planeta, que possibilitará medir o movimento de seus satélites. A segunda etapa terá início a partir do funcionamento do telescópio em modo robótico, com a possibilidade de observações via internet por instituições de ensino. Para o desenvolvimento deste experimento foram inicialmente coletadas várias imagens de Júpiter obtidas com os instrumentos citados acima. Estas imagens serviram como base para confecção dos roteiros para a experiência no nível médio e superior. Os roteiros serão inicialmente apresentados em uma home-page. Nela também se buscará uma contextualização histórica da experiência bem como o estabelecimento de relações com professores e alunos, propostas metodológicas e a disponibilização dos programas computacionais necessários para a utilização "on-line" pelos usuários. O projeto conta com apoio da Fundação VITAE.

Schlickmann, M. S.; Saito, R. K.; Becker, D. A.; Rezende, M. F., Jr.; Cid Fernandes, R.

2003-08-01

85

Design of a Monolithic Active Pixel Sensor in ST 0.13UM Technology  

NASA Astrophysics Data System (ADS)

This paper presents the architecture of a new Monolithic Active Pixel Sensor chip designed in ST Microelectronics 0.13um CMOS technology at the Roma Tre University INFN Section. The two goals of the chip are: technology characterization and test of data sparsification architecture, implemented to fulfil requirements of the future high energy physics experiments. In the intended applications the commonly used 'off-line' and 'off-chip' signal processing is not possible due to a huge bandwidth needed to read out all pixels at a satisfactory speed. The authors propose a new approach for the on-line data sparsification which consists in implementation of the full on-pixel signal processing. The difficulties that had to be overcame are: limited on-pixel silicon area for fitting all the necessary electronic circuitry, forced use of only NMOS transistors in the sensing area, current and threshold mismatch typical for CMOS submicron technologies. Finally special care had to be taken to avoid crosstalk from digital to analog signals.

Mlynarczyk, Janusz; Spirit, Eleuterio; Bulgheroni, Antonio

2008-06-01

86

OV-Wav: um novo pacote para análise multiescalar em astronomia  

NASA Astrophysics Data System (ADS)

Wavelets e outras formas de análise multiescalar têm sido amplamente empregadas em diversas áreas do conhecimento, sendo reconhecidamente superiores a técnicas mais tradicionais, como as análises de Fourier e de Gabor, em certas aplicações. Embora a teoria dos wavelets tenha começado a ser elaborada há quase trinta anos, seu impacto no estudo de imagens astronômicas tem sido pequeno até bem recentemente. Apresentamos um conjunto de programas desenvolvidos ao longo dos últimos três anos no Observatório do Valongo/UFRJ que possibilitam aplicar essa poderosa ferramenta a problemas comuns em astronomia, como a remoção de ruído, a detecção hierárquica de fontes e a modelagem de objetos com perfis de brilho arbitrários em condições não ideais. Este pacote, desenvolvido para execução em plataforma IDL, teve sua primeira versão concluída recentemente e está sendo disponibilizado à comunidade científica de forma aberta. Mostramos também resultados de testes controlados ao quais submetemos os programas, com a sua aplicação a imagens artificiais, com resultados satisfatórios. Algumas aplicações astrofísicas foram estudadas com o uso do pacote, em caráter experimental, incluindo a análise da componente de luz difusa em grupos compactos de galáxias de Hickson e o estudo de subestruturas de nebulosas planetárias no espaço multiescalar.

Pereira, D. N. E.; Rabaça, C. R.

2003-08-01

87

Flux and color variations of the doubly imaged quasar UM673?  

NASA Astrophysics Data System (ADS)

Aims: With the aim of characterizing the flux and color variations of the multiple components of the gravitationally lensed quasar UM673 as a function of time, we have performed multiepoch and multiband photometric observations with the Danish telescope at the La Silla Observatory. Methods: The observations were carried out in the VRi spectral bands during four seasons (2008-2011). We reduced the data using the point spread function photometric technique as well as aperture photometry. Results: Our results show for the brightest lensed component some significant decrease in flux between the first two seasons (+ 0.09/+ 0.11/+ 0.05 mag) and a subsequent increase during the following ones (- 0.11/- 0.11/- 0.10 mag) in the V/R/i spectral bands, respectively. Comparing our results with previous studies, we find smaller color variations between these seasons as compared with previous ones. We also separate the contribution of the lensing galaxy from that of the fainter and close lensed component. Based on data collected by MiNDSTEp with the Danish 1.54 m telescope at the ESO La Silla ObservatoryLight curves are only available in electronic from at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/551/A104

Ricci, D.; Elyiv, A.; Finet, F.; Wertz, O.; Alsubai, K.; Anguita, T.; Bozza, V.; Browne, P.; Burgdorf, M.; Calchi Novati, S.; Dodds, P.; Dominik, M.; Dreizler, S.; Gerner, T.; Glitrup, M.; Grundahl, F.; Hardis, S.; Harpsøe, K.; Hinse, T. C.; Hornstrup, A.; Hundertmark, M.; Jørgensen, U. G.; Kains, N.; Kerins, E.; Liebig, C.; Maier, G.; Mancini, L.; Masi, G.; Mathiasen, M.; Penny, M.; Proft, S.; Rahvar, S.; Scarpetta, G.; Sahu, K.; Schäfer, S.; Schönebeck, F.; Schmidt, R.; Skottfelt, J.; Snodgrass, C.; Southworth, J.; Thöne, C. C.; Wambsganss, J.; Zimmer, F.; Zub, M.; Surdej, J.

2013-03-01

88

BUDDA (Bulge/Disk Decomposition Analysis) - um novo programa para análise estrutural de galáxias  

NASA Astrophysics Data System (ADS)

Tem sido prática comum nos últimos anos estudar a distribuição de luminosidade em galáxias fazendo uso da informação contida em toda a imagem da galáxia, já que esta técnica tem se mostrado muito mais confiável do que o simples ajuste de perfis radiais de luminosidade. Através destes estudos bidimensionais, melhores resultados tem sido obtidos na análise e.g. do Plano Fundamental, de correlações entre os parâmetros estruturais de galáxias, de sub-estruturas como barras e anéis nucleares etc. Apresentamos um novo código bidimensional, o BUDDA, de análise estrutural de galáxias, que será disponibilizado para a comunidade. Desenvolvido por nós, o código determina os parâmetros estruturais de galáxias de forma prática e robusta, e pode ser aplicado genericamente em qualquer estudo sobre a formação, evolução e estrutura de galáxias. O programa ainda permite a avaliação direta de sub-estruturas, através de imagens residuais que são obtidas ao se subtrair, das imagens originais, bojo e disco sintéticos que melhor representam essas componentes da galáxia sob consideração. Será apresentada a forma de utilização do código, bem como séries de testes que atestam a sua funcionalidade. Além disso, os resultados da aplicação do código em uma amostra de 51 galáxias serão expostos como exemplo prático, e do seu enorme potencial de uso.

Gadotti, D. A.; de Souza, R. E.; Dos Anjos, S.

2003-08-01

89

AVALIAÇÃO DE ASPECTOS POLÍTICO-INSTITUCIONAIS E ECONÔMICO- FINANCEIROS DO SETOR DE SANEAMENTO NO BRASIL COM VISTAS À DEFINIÇÃO DE ELEMENTOS PARA UM MODELO CONCEITUAL EVALUATION OF POLITICAL, INSTITUCIONAL, ECONOMIC AND FINANCIAL ASPECTS OF THE SANITARY SECTOR IN BRAZIL IN ORDER TO DEFINE ELEMENTS FOR A CONCEPTUAL MODEL  

Microsoft Academic Search

The main objective of this paper is the definition of water supply and sanitation determinant elements to be included in a conceptual model. Because political and institutional arrangements and economic and financial conditions of the water sector have a great influence on planning and actions implementation, those aspects were considered as elements to compose and construct parts of this model.

SÉRGIO R. AYRIMORAES SOARES; OSCAR DE M. CORDEIRO; RICARDO S. BERNARDES

90

Perspectivas de Estimativa DOS Balancos Anuais Hidrico E de Carbono Em Ecossistemas Florestais a Partir de Um Modelo Biogeoquimico Florestal Associado a Tecnicas de Sensoriamento Remoto Orbital (Computation of Carbon and Water Cycles in Forest Ecosystems Using a Biogeochemical Model and Remotely Sensed Data).  

National Technical Information Service (NTIS)

This work is intended to test and evaluate how well a regional biogeochemical model is able to represent the major processes of the hydrologic and carbon cycles of forest ecosystems of conifers, growing in three different climatic areas in Brazil. The mod...

M. Deavilachaves

1992-01-01

91

Amiloidose sistêmica do tipo AA em um canino Shar-pei Chinês Systemic Amyloidosis type AA in a dog Chinese Shar-Pei  

Microsoft Academic Search

A deposição sistêmica do amilóide pode ocorrer de forma hereditária, a predisposição ocorre principalmente em gatos Abissínios e cães da raça Shar-pei Chinês. Um canino da raça Shar-pei Chinês foi encaminhado para necropsia no Setor de Patologia Veterinária da UFRGS. O canino apresentava aumento de volume dos membros posteriores e nos seus exames bioquímicos havia um aumento significativo de creatinina

Luciana Sonne; Eduardo Conceição de Oliveira; Adriana da Silva Santos; Saulo Petinatti Pavarini; Pedro Soares Bezerra Júnior; Nadia Aline; Bobbi Antoniassi; Jardel Pereira Tessari; David Driemeier

92

Estudo-piloto com clozapina em hospital público: resultados de um ano de acompanhamento Clozapine pilot study in a public hospital: one-year follow-up results  

Microsoft Academic Search

Objetivos: Estudo-piloto prospectivo e naturalístico para avaliação da efetividade e segurança do uso da clozapina em pacientes esquizofrênicos crônicos resistentes, em tratamento num hospital psiquiátrico público - Instituto Municipal Nise da Silveira, localizado no Rio de Janeiro, RJ. Método: Foram tratados com clozapina, por um período de um ano, monitorados com hemogramas semanais nas 18 primeiras semanas e mensais nas

Carlos Eduardo da Rocha

93

UM-SCC-104: a new human papillomavirus-16 containing head and neck squamous cell carcinoma cell line  

PubMed Central

BACKGROUND Few human papillomavirus (HPV)-positive head and neck squamous cell carcinoma (HNSCC) cell lines exist. We established UM-SCC-104, a new HPV(+) HNSCC cell linefrom a recurrent oral cavity tumor, and characterized it for the presence of cancer stem cells (CSC). METHODS Tumor cells were tested for biomarker expression by immunohistology and the presence of HPV was assessed by several methods. RESULTS UM-SCC-104 has a unique genotype, contains HPV-16 and expresses E6/E7. Inoculation of (Aldehyde Dehydrogenase) ALDH(+) and ALDH(?) cells in an immunocompromised mouse resulted in tumor growth from the ALDH(+) cells after 6 weeks that recapitulated the histology of the primary, while ALDH(?) cells did not produce tumors. CONCLUSIONS UM-SCC-104, a new HPV-16, CSC-containing HNSCC cell line will aid in studying recurrent HPV(+) tumors. The aggressive nature of this tumor is consistent with high uniform expression of EGFR and a functionally significant proportion of ALDH(+) CSC.

Tang, Alice L.; Davis, Samantha J.; Owen, John H.; Graham, Martin P.; Czerwinski, Michael J.; Park, Jung Je; Walline, Heather; Stoerker, Jay; McHugh, Jonathan B.; Chepeha, Douglas; Bradford, Carol R.; Carey, Thomas E.; Prince, Mark E.

2012-01-01

94

Spectral reflectance of carbonate minerals in the visible and near infrared (0.35-2.55 um): Anhydrous carbonate minerals  

NASA Astrophysics Data System (ADS)

Reflectance spectroscopy in the visible and near infrared (0.35-2.55 um) offers a rapid, inexpensive, nondestructive technique for determining the mineralogy and gaining information on the minor element chemistry of carbonate minerals and rocks. Spectra of all commonly occurring anhydrous end-member carbonate minerals contain seven strong absorption bands at wavelengths >1.6 um due to vibrations of the carbonate radical. Positions, widths, and spacing between carbonate bands are diagnostic of mineralogy. Differences in positions of carbonate bands between spectra of different minerals are primarily due to differences in mass of the major cation, with cation electronegativity playing a secondary role. Spectra of calcite group minerals may contain absorption features due to transition metal cations such as Fe and Mn, which can also aid in mineral identification. Spectra confirm the occurrence of both cations in the divalent state. Fe2+ produces a broad feature near 1.1 um whose position and degree of doubling are related to the size and degree of distortion of the octahedral site, as predicted by crystal field theory. Mn2+ and Fe2+ produce very strong absorption bands in the minerals for which they are the major cation (rhodochrosite and siderite, respectively), making it easy to distinguish these from other carbonate minerals, even when presence of water bands may make it difficult to determine accurately carbonate band positions.

Gaffey, Susan J.

1987-02-01

95

NE VIII lambda 774 and time variable associated absorption in the QSO UM 675  

NASA Astrophysics Data System (ADS)

We discuss measurements of Ne VIII lambda 774 absorption and the time variability of other lines in the za approximately equal ze absorption system of the ze = 2.15 QSO UM 675 (0150-203). The C IV lambda 1549 and N V 1240 doublets at za = 2.1340 (shifted approximately 1500 km/s from ze strengthened by a factor of approximately 3 between observations by Sargent, Boksenberg and Steidel (1981 November) and our earliest measurements (1990 November and December). We have no information on changes in other za approximately equal ze absorption lines. Continued monitoring since 1990 November shows no clear changes in any of the absorptions between approximately 1100 and 1640 A rest. The short timescale of the variability (less than or approximately equal to 2.9 yr rest) strongly suggests that the clouds are dense, compact, close to the QSO, and photoionized by the QSO continuum. If the line variability is caused by changes in the ionization, the timescale requires densities greater than approximately 4000/cu cm. Photoionization calculations place the absorbing clouds within approximately 200 pc of the continuum source. The full range of line ionizations (from Ne VIII lambda 774 to C III lambda 977) in optically thin gas (no Lyman limit) implies that the absorbing regions span a factor of more than approximately 10 in distance or approximately 100 in density. Across these regions, the total hydrogen (H I + H II) column ranges from a few times 1018/sq cm in the low-ionization gas to approximately 1020/sq cm where the Ne VIII doublet forms. The metallicity is roughly solar or higher, with nitrogen possibly more enhanced by factors of a few. The clouds might contribute significant line emission if they nearly envelop the QSO. The presence of highly ionized Ne VIII lambda 774 absorption near the QSO supports recent studies that link za approximately equal to ze systems with X-ray 'wamr absorbers. We show that the Ne VIII absorbing gas would itself produce measurable warm absorption -- characterized by bound-free O VII or O VIII edegs near 0.8 keV -- if the column densities were NH greater than or approximately equal to 1021/sq cm (for solar abundances).

Hamann, Fred; Barlow, Thomas A.; Beaver, E. A.; Burbidge, E. M.; Cohen, Ross D.; Junkkarinen, Vesa; Lyons, R.

1995-04-01

96

Microwave window breakdown experiments and simulations on the UM/L-3 relativistic magnetron  

NASA Astrophysics Data System (ADS)

Experiments have been performed on the UM/L-3 (6-vane, L-band) relativistic magnetron to test a new microwave window configuration designed to limit vacuum side breakdown. In the baseline case, acrylic microwave windows were mounted between three of the waveguide coupling cavities in the anode block vacuum housing and the output waveguides. Each of the six 3 cm deep coupling cavities is separated from its corresponding anode cavity by a 1.75 cm wide aperture. In the baseline case, vacuum side window breakdown was observed to initiate at single waveguide output powers close to 20 MW. In the new window configuration, three Air Force Research Laboratory-designed, vacuum-rated directional coupler waveguide segments were mounted between the coupling cavities and the microwave windows. The inclusion of the vacuum side power couplers moved the microwave windows an additional 30 cm away from the anode apertures. Additionally, the Lucite microwave windows were replaced with polycarbonate windows and the microwave window mounts were redesigned to better maintain waveguide continuity in the region around the microwave windows. No vacuum side window breakdown was observed in the new window configuration at single waveguide output powers of 120+MW (a factor of 3 increase in measured microwave pulse duration and factor of 3 increase in measured peak power over the baseline case). Simulations were performed to investigate likely causes for the window breakdown in the original configuration. Results from these simulations have shown that in the original configuration, at typical operating voltage and magnetic field ranges, electrons emitted from the anode block microwave apertures strike the windows with a mean kinetic energy of 33 keV with a standard deviation of 14 keV. Calculations performed using electron impact angle and energy data predict a first generation secondary electron yield of 65% of the primary electron population. The effects of the primary aperture electron impacts, combined with multiplication of the secondary populations, were determined to be the likely causes of the poor microwave window performance in the original configuration.

Hoff, B. W.; Mardahl, P. J.; Gilgenbach, R. M.; Haworth, M. D.; French, D. M.; Lau, Y. Y.; Franzi, M.

2009-09-01

97

Microwave window breakdown experiments and simulations on the UM/L-3 relativistic magnetron.  

PubMed

Experiments have been performed on the UM/L-3 (6-vane, L-band) relativistic magnetron to test a new microwave window configuration designed to limit vacuum side breakdown. In the baseline case, acrylic microwave windows were mounted between three of the waveguide coupling cavities in the anode block vacuum housing and the output waveguides. Each of the six 3 cm deep coupling cavities is separated from its corresponding anode cavity by a 1.75 cm wide aperture. In the baseline case, vacuum side window breakdown was observed to initiate at single waveguide output powers close to 20 MW. In the new window configuration, three Air Force Research Laboratory-designed, vacuum-rated directional coupler waveguide segments were mounted between the coupling cavities and the microwave windows. The inclusion of the vacuum side power couplers moved the microwave windows an additional 30 cm away from the anode apertures. Additionally, the Lucite microwave windows were replaced with polycarbonate windows and the microwave window mounts were redesigned to better maintain waveguide continuity in the region around the microwave windows. No vacuum side window breakdown was observed in the new window configuration at single waveguide output powers of 120+MW (a factor of 3 increase in measured microwave pulse duration and factor of 3 increase in measured peak power over the baseline case). Simulations were performed to investigate likely causes for the window breakdown in the original configuration. Results from these simulations have shown that in the original configuration, at typical operating voltage and magnetic field ranges, electrons emitted from the anode block microwave apertures strike the windows with a mean kinetic energy of 33 keV with a standard deviation of 14 keV. Calculations performed using electron impact angle and energy data predict a first generation secondary electron yield of 65% of the primary electron population. The effects of the primary aperture electron impacts, combined with multiplication of the secondary populations, were determined to be the likely causes of the poor microwave window performance in the original configuration. PMID:19791954

Hoff, B W; Mardahl, P J; Gilgenbach, R M; Haworth, M D; French, D M; Lau, Y Y; Franzi, M

2009-09-01

98

On the Compact H II Galaxy UM 408 as Seen by GMOS-IFU: Physical Conditions  

NASA Astrophysics Data System (ADS)

We present Integral Field Unit GMOS-IFU data of the compact H II galaxy UM 408, obtained at the Gemini South telescope, in order to derive the spatial distribution of emission lines and line ratios, kinematics, plasma parameters, and oxygen abundances as well the integrated properties over an area of 3''×4farcs4 equivalent with ~750 pc × 1100 pc located in the central part of the galaxy. The starburst in this area is resolved into two giant regions of about 1farcs5 and 1'' (~375 and ~250 pc) diameter, respectively and separated 1.5-2'' (~500 pc). The extinction distribution concentrate its highest values close but not coincident with the maxima of H? emission around each one of the detected regions. This indicates that the dust has been displaced from the exciting clusters by the action of their stellar winds. The ages of these two regions, estimated using H? equivalent widths, suggest that they are coeval events of ~5 Myr with stellar masses of ~104 M sun. We have also used [O III]/H? and [S II]/H? ratio maps to explore the excitation mechanisms in this galaxy. Comparing the data points with theoretical diagnostic models, we found that all of them are consistent with excitation by photoionization by massive stars. The H? emission line was used to measure the radial velocity and velocity dispersion. The heliocentric radial velocity shows an apparent systemic motion where the east part of the galaxy is blueshifted, while the west part is redshifted, with a relative motion of ~10 km s-1. The velocity dispersion map shows supersonic values typical for extragalactic H II regions. We derived an integrated oxygen abundance of 12+log(O/H) = 7.87 summing over all spaxels in our field of view. An average value of 12+log(O/H) = 7.77 and a difference of ?(O/H) = 0.47 between the minimum and maximum values (7.58 ± 0.06-8.05 ± 0.04) were found, considering all data points where the oxygen abundance was measured. The spatial distribution of oxygen abundance does not show any significant gradient across the galaxy. On the other hand, the bulk of data points are lying in a region of ±2? dispersion (with ? = 0.1 dex) around the average value, confirming that this compact H II galaxy, like other previously studied dwarf irregular galaxies, is chemically homogeneous. Therefore, the new metals processed and injected by the current star formation episode are possibly not observed and reside in the hot gas phase, whereas the metals from previous events are well mixed and homogeneously distributed through the whole extent of the galaxy.

Lagos, Patricio; Telles, Eduardo; Muñoz-Tuñón, Casiana; Carrasco, Eleazar R.; Cuisinier, François; Tenorio-Tagle, Guillermo

2009-06-01

99

ON THE COMPACT H II GALAXY UM 408 AS SEEN BY GMOS-IFU: PHYSICAL CONDITIONS  

SciTech Connect

We present Integral Field Unit GMOS-IFU data of the compact H II galaxy UM 408, obtained at the Gemini South telescope, in order to derive the spatial distribution of emission lines and line ratios, kinematics, plasma parameters, and oxygen abundances as well the integrated properties over an area of 3''x4.''4 equivalent with {approx}750 pc x 1100 pc located in the central part of the galaxy. The starburst in this area is resolved into two giant regions of about 1.''5 and 1'' ({approx}375 and {approx}250 pc) diameter, respectively and separated 1.5-2'' ({approx}500 pc). The extinction distribution concentrate its highest values close but not coincident with the maxima of H{alpha} emission around each one of the detected regions. This indicates that the dust has been displaced from the exciting clusters by the action of their stellar winds. The ages of these two regions, estimated using H{beta} equivalent widths, suggest that they are coeval events of {approx}5 Myr with stellar masses of {approx}10{sup 4} M {sub sun}. We have also used [O III]/H{beta} and [S II]/H{alpha} ratio maps to explore the excitation mechanisms in this galaxy. Comparing the data points with theoretical diagnostic models, we found that all of them are consistent with excitation by photoionization by massive stars. The H{alpha} emission line was used to measure the radial velocity and velocity dispersion. The heliocentric radial velocity shows an apparent systemic motion where the east part of the galaxy is blueshifted, while the west part is redshifted, with a relative motion of {approx}10 km s{sup -1}. The velocity dispersion map shows supersonic values typical for extragalactic H II regions. We derived an integrated oxygen abundance of 12+log(O/H) = 7.87 summing over all spaxels in our field of view. An average value of 12+log(O/H) = 7.77 and a difference of {delta}(O/H) = 0.47 between the minimum and maximum values (7.58 {+-} 0.06-8.05 {+-} 0.04) were found, considering all data points where the oxygen abundance was measured. The spatial distribution of oxygen abundance does not show any significant gradient across the galaxy. On the other hand, the bulk of data points are lying in a region of {+-}2{sigma} dispersion (with {sigma} = 0.1 dex) around the average value, confirming that this compact H II galaxy, like other previously studied dwarf irregular galaxies, is chemically homogeneous. Therefore, the new metals processed and injected by the current star formation episode are possibly not observed and reside in the hot gas phase, whereas the metals from previous events are well mixed and homogeneously distributed through the whole extent of the galaxy.

Lagos, Patricio; Telles, Eduardo [Observatorio Nacional, Rua Jose Cristino, 77, Rio de Janeiro, 20921-400 (Brazil); Munoz-Tunon, Casiana [Instituto de Astrofisica de Canarias, Via Lactea s/n, 38200 La Laguna (Spain); Carrasco, Eleazar R. [Gemini Observatory/AURA, Southern Operations Center, Casilla 603, La Serena (Chile); Cuisinier, Francois [Observatorio do Valongo UFRJ, Ladeira do Pedro Antonio 43, Rio de Janeiro 20080-090 (Brazil); Tenorio-Tagle, Guillermo [Instituto Nacional de Astrofisica Optica y Electronica, AP 51, 72000 Puebla (Mexico)], E-mail: plagos@iac.es, E-mail: etelles@on.br, E-mail: cmt@iac.es, E-mail: rcarrasco@gemini.edu, E-mail: francois@ov.ufrj.br, E-mail: gtt@inaoep.mx

2009-06-15

100

User's manual (UM) for the enhanced logistics intratheater support tool (ELIST) database utility segment version 8.1.0.0 for solaris 7.  

SciTech Connect

This document is the User's Manual (UM) for the Enhanced Logistics Intratheater Support Tool (ELIST) Database Utility Segment. It tells how to use its features to administer ELIST database user accounts.

Dritz, K.

2002-03-06

101

UM4D4+ (CDw60) T Cells Are Compartmentalized into Psoriatic Skin and Release Lymphokines That Induce a Keratinocyte Phenotype Expressed in Psoriatic Lesions  

Microsoft Academic Search

UM4D4 (CDw60), the surface molecule of a novel antigen- independent T-cell activation pathway, was found to be highly expressed on lesional psoriatic T cells. To examine whether UM4D4 represents a T-cell activation pathway for psoriatic T cells, a T-cell line was initiated from an acute skin lesion and cloned by limiting dilution. Clonality was verified by analysis of T-cell receptor

Ole Baadsgaard; Peggy Tong; James T. Elder; Erik R. Hansen; Vincent Ho; Craig Hammerberg; Gunhild Lange-Vejlsgaard; David A. Fox; Gary Fisher; Lawrence S. Chan; John J. Voorhees; Kevin D. Cooper

1990-01-01

102

Imagens do céu ontem e hoje - um multimídia interativo de astronomia e uma nova exposição no MAST  

NASA Astrophysics Data System (ADS)

"Imagens do Céu Ontem e Hoje" é o título de uma nova exposição que está sendo inaugurada no Museu de Astronomia e Ciências Afins (MCT), que inclui experimentos interativos, maquetes, réplicas e 8 terminais de computador com um multimídia interativo sobre Astronomia para consulta dos visitantes. O multimídia apresenta um conteúdo bastante extenso, que engloba quase todos os temas em Astronomia, consistindo numa fonte de divulgação e pesquisa para um público que vai das crianças até estudantes universitários. O conteúdo está distribuído em mais de 500 páginas de texto divididas em 4 módulos: "O Universo", "Espectroscopia", "Telescópios" e "Observando o Céu". Cada módulo é subdividido em 5 seções, em média, cada uma iniciada por uma animação que ilustra os temas a serem abordados na seção. Ao final da animação, uma lista de temas é apresentada sob o título "Saiba Mais". Para exemplificar, o módulo "O Universo" contém as seguintes seções: "O Universo visto pelo homem", "Conhecendo o Sistema Solar", "Indo além do Sistema Solar", "Nossa Galáxia, a Via-Láctea" e "Indo mais além, a imensidão do Universo". A seção "Conhecendo o Sistema Solar", por sua vez, tem os seguintes temas: "A origem do Sistema Solar", "O Sol", "Os planetas", "Satélites, asteróides, cometas e outros bichos..." e "O Sistema Solar em números". Cada texto é repleto de imagens, quadros, desenhos, esquemas, etc, além de passatempos ao final de cada seção, incluindo jogos interativos, quadrinhos e curiosidades, que auxiliam o aprendizado de forma divertida. Apresentamos neste trabalho as idéias gerais que permearam a produção da exposição, e uma viagem pelo multimídia para exemplificar sua estrutura e conteúdo. O multimídia será posteriormente disponibilizado para o público externo pela página eletrônica do MAst e/ou por intermédio de uma publicação comercial.

Caretta, C. A.; Lima, F. P.; Requeijo, F.; Vieira, G. G.; Alves, F.; Valente, M. E. A.; de Almeida, R.; de Garcia, G. C.; Quixadá, A. C.

2003-08-01

103

Implementation of the Fast-JX Photolysis scheme into the UKCA component of the MetUM chemistry climate model  

NASA Astrophysics Data System (ADS)

Atmospheric chemistry is driven by photolytic reactions, making their modelling a crucial component of atmospheric models. We describe the implementation and validation of Fast-JX, a state of the art model of interactive photolysis, into the MetUM chemistry climate model. This allows for interactive photolysis frequencies to be calculated in the troposphere and augments the calculation of the frequencies in the stratosphere by accounting for clouds and aerosols in addition to ozone. In order to demonstrate the effectiveness of this new photolysis scheme we employ new methods of validating the model, including techniques for sampling the model to compare to flight track and satellite data.

Telford, P. J.; Abraham, N. L.; Archibald, A. T.; Braesicke, P.; Dalvi, M.; Morgenstern, O.; O'Connor, F. M.; Richards, N. A. D.; Pyle, J. A.

2012-10-01

104

The U. S. Geological Survey, Digital Spectral Library: Version 1 (0.2 to 3.0um)  

USGS Publications Warehouse

We have developed a digital reflectance spectral library, with management and spectral analysis software. The library includes 498 spectra of 444 samples (some samples include a series of grain sizes) measured from approximately 0.2 to 3.0 um . The spectral resolution (Full Width Half Maximum) of the reflectance data is <= 4 nm in the visible (0.2-0.8 um) and <= 10 nm in the NIR (0.8-2.35 um). All spectra were corrected to absolute reflectance using an NIST Halon standard. Library management software lets users search on parameters (e.g. chemical formulae, chemical analyses, purity of samples, mineral groups, etc.) as well as spectral features. Minerals from borate, carbonate, chloride, element, halide, hydroxide, nitrate, oxide, phosphate, sulfate, sulfide, sulfosalt, and the silicate (cyclosilicate, inosilicate, nesosilicate, phyllosilicate, sorosilicate, and tectosilicate) classes are represented. X-Ray and chemical analyses are tabulated for many of the entries, and all samples have been evaluated for spectral purity. The library also contains end and intermediate members for the olivine, garnet, scapolite, montmorillonite, muscovite, jarosite, and alunite solid-solution series. We have included representative spectra of H2O ice, kerogen, ammonium-bearing minerals, rare-earth oxides, desert varnish coatings, kaolinite crystallinity series, kaolinite-smectite series, zeolite series, and an extensive evaporite series. Because of the importance of vegetation to climate-change studies we have include 17 spectra of tree leaves, bushes, and grasses. The library and software are available as a series of U.S.G.S. Open File reports. PC user software is available to convert the binary data to ascii files (a separate U.S.G.S. open file report). Additionally, a binary data files are on line at the U.S.G.S. in Denver for anonymous ftp to users on the Internet. The library search software enables a user to search on documentation parameters as well as spectral features. The analysis system includes general spectral analysis routines, plotting packages, radiative transfer software for computing intimate mixtures, routines to derive optical constants from reflectance spectra, tools to analyze spectral features, and the capability to access imaging spectrometer data cubes for spectral analysis. Users may build customized libraries (at specific wavelengths and spectral resolution) for their own instruments using the library software. We are currently extending spectral coverage to 150 um. The libraries (original and convolved) will be made available in the future on a CD-ROM.

Clark, Roger N.; Swayze, Gregg A.; Gallagher, Andrea J.; King, Trude V. V.; Calvin, Wendy M.

1993-01-01

105

Silver and silver-bearing minerals at the Um Samiuki volcanogenic massive sulphide deposit, Eastern Desert, Egypt  

NASA Astrophysics Data System (ADS)

The Um Samiuki Zn Cu Pb Ag mineralisation, south Eastern Desert, Egypt is hosted by felsic volcanic rocks which form part of the 712-Ma-old, east-west-trending Shadli Volcanic Belt. Two major occurrences of massive sulphides are present at the top of rhyolitic breccia in the Western and Eastern mine areas. In each occurrence, a bornite-bearing zone is overlain by a pyrite-chalcopyrite-bearing zone and underlain by a disseminated, Cu-depleted zone. In the massive sulphide ore, sphalerite, chalcopyrite, pyrite, galena, bornite and tetrahedrite tennantite are major minerals, whereas arsenopyrite, pyrrhotite, molybdenite and magnetite are accessory phases. Covellite and digenite are common secondary minerals. Bornite, tetrahedrite tennantite and covellite contain high amounts of silver (averages of 1.97, 1.39 and 1.82 wt% respectively). Based on mineralogical balance calculations, bornite and covellite accommodate 80% of silver in the Um Samiuki deposit. Ag was incorporated in the crystal structure of the early-crystallised copper sulphides and sulphosalts and silver minerals. The temperature, sequential precipitation of the fluids and the structure of the crystallising phases control the distribution of silver. Post-depositional deformation and metamorphic processes caused liberation, remobilisation and redeposition of silver within the massive sulphides.

Shalaby, Ibrahim M.; Stumpfl, Eugen; Helmy, Hassan M.; El Mahallawi, Mahmoud M.; Kamel, Omar A.

2004-10-01

106

A Visão do Universo Segundo a Concepção de um Grupo de Alunos do Ensino Médio de São Paulo  

NASA Astrophysics Data System (ADS)

Nesse trabalho foi identificada por meio de um questionário a visão de mundo sobre o Universo espaço e tempo entre 270 estudantes de Ensino Médio de três escolas de São Paulo. Constatou-se pouco conhecimento dos temas investigados sendo que apenas 20% dos alunos relacionaram as semanas com as fases da lua enquanto 28% associaram as estações do ano à inclinação do eixo de rotação da Terra e 23% tinham noções das distâncias entre objetos celestes próximos da Terra. Enquanto 56% conseguiram relacionar o Big Bang com a origem do Universo verificou-se que 37% reconheciam ano-luz como unidade de distância e 60% reconheciam o Sol como uma estrela. Apesar de 60% dos alunos indicarem a escola como principal fonte dos conhecimentos de astronomia seus conceitos ainda são inadequados havendo necessidade de aprimoramento da abordagem desses conteúdos pois apesar de popular a astronomia é veiculada de maneira pouco esclarecedora e com imprecissões.

Araújo, M. A. A.; Elias, D. C. N.; Amaral, L. H.; Araújo, M. S. T.; Voelzke, M. R.

2005-12-01

107

The yfhQ gene of Escherichia coli encodes a tRNA:Cm32/Um32 methyltransferase  

PubMed Central

Background Naturally occurring tRNAs contain numerous modified nucleosides. They are formed by enzymatic modification of the primary transcripts during the complex RNA maturation process. In model organisms Escherichia coli and Saccharomyces cerevisiae most enzymes involved in this process have been identified. Interestingly, it was found that tRNA methylation, one of the most common modifications, can be introduced by S-adenosyl-L-methionine (AdoMet)-dependent methyltransferases (MTases) that belong to two structurally and phylogenetically unrelated protein superfamilies: RFM and SPOUT. Results As a part of a large-scale project aiming at characterization of a complete set of RNA modification enzymes of model organisms, we have studied the Escherichia coli proteins YibK, LasT, YfhQ, and YbeA for their ability to introduce the last unassigned methylations of ribose at positions 32 and 34 of the tRNA anticodon loop. We found that YfhQ catalyzes the AdoMet-dependent formation of Cm32 or Um32 in tRNASer1 and tRNAGln2 and that an E. coli strain with a disrupted yfhQ gene lacks the tRNA:Cm32/Um32 methyltransferase activity. Thus, we propose to rename YfhQ as TrMet(Xm32) according to the recently proposed, uniform nomenclature for all RNA modification enzymes, or TrmJ, according to the traditional nomenclature for bacterial tRNA MTases. Conclusion Our results reveal that methylation at position 32 is carried out by completely unrelated TrMet(Xm32) enzymes in eukaryota and prokaryota (RFM superfamily member Trm7 and SPOUT superfamily member TrmJ, respectively), mirroring the scenario observed in the case of the m1G37 modification (introduced by the RFM member Trm5 in eukaryota and archaea, and by the SPOUT member TrmD in bacteria).

Purta, Elzbieta; van Vliet, Francoise; Tkaczuk, Karolina L; Dunin-Horkawicz, Stanislaw; Mori, Hirotada; Droogmans, Louis; Bujnicki, Janusz M

2006-01-01

108

Geochemical and K Ar age constraints on the Late Neoproterozoic (?) gneisses at Um Tenassib area, north Eastern Desert, Egypt  

NASA Astrophysics Data System (ADS)

Wadi Um Tenassib metamorphic rocks consist mainly of biotite gneiss and biotite-hornblende gneiss with subordinate intercalations of amphibolite, migmatitic gneiss, and aplitic granite. Biotite-hornblende gneiss, biotite gneiss, and aplitic granite are geochemically characterized and their cooling ages are determined by using the K Ar method on biotite. The Um Tenassib gneisses (UTG) range in composition from quartz diorite/monzodiorite to granodiorite. They were derived from igneous rocks that pertain to calc alkaline and metaluminous to weakly peraluminous affinities and were generated in continental volcanic arc setting. REE patterns of the UTG are moderately fractionated (LaN/LuN = 5.9 7.5) relative to those of the aplitic granite (LaN/LuN = 33). The similarity in the geochemical characteristics and REE patterns of both gneiss types indicate their magmatic consanguinity. Amphiboles of the UTG biotite-hornblende gneisses are mainly hornblende, together with few paragasitic hornblende and edenite. Plagioclase composition is oligoclase to andesine (An21 46) in the biotite-hornblende gneiss, and oligoclase (An11 26) in the biotite gneiss. Mineral chemistry of amphibole and plagioclase indicate that the gneisses were metamorphosed under low- to medium-pressure of 2.6 6.4 kbar and at medium to high temperatures of 660 755 °C. The K Ar biotite cooling ages (seven samples) range from 585 ± 12 Ma to 598 ± 12 Ma for the UTG, except one biotite-hornblende gneiss sample gives age of 577 ± 11 Ma. These ages suggest a latest metamorphic cooling event at ca. 585 600 Ma time span, which is consistent with the proposed cooling ages of ˜600 Ma for the Elat metamorphic rocks [Cosca, M.A., Shimron, A., Caby, R., 1999. Late Precambrian metamorphism and cooling in the Arabian Nubian Shield: petrology and 40Ar/39Ar geochronology of metamorphic rocks of the Elat area (southern Israel). Precamb. Res. 98, 107 127]. It may indicate that the metamorphism of the UTG might have been contemporaneous with the suggested regional metamorphism at 620 ± 10 Ma for Sinai metamorphic rocks (Cosca et al., 1999) and/or the emplacement age at 614 Ma for the granodiorite in the study area [Stern, R.J., Hedge, C.E., 1985. Geochronological and isotopic constraints on the Late Precambrian crustal evolution in the Eastern Desert of Egypt. Am. J. Sci. 285, 97 127]. These ages also lie within the range of magmatic activity of the Younger Granites in the North Eastern Desert (575 600 Ma).

Eliwa, Hassan A.

2007-05-01

109

The Workload of the UMS Faculty. A Report to the Joint Chairs of the Senate Budget and Taxation Committee and the House Appropriations Committee.  

ERIC Educational Resources Information Center

|This report provides the results of a study of faculty workloads in the University of Maryland System (UMS) during the 1994-95 academic year. It was found that 19,446 course units were taught by full-time (FT) faculty at degree-granting institutions, an increase of 158 course units from the previous year while the number of FT faculty decreased…

Maryland Univ. System Administration, Adelphi.

110

Effects of basic fibroblast growth factor on the differentiation, growth, and viability of a new human medulloblastoma cell line (UM-MB1).  

PubMed Central

We presently report the effects of human recombinant basic fibroblast growth factor (bFGF) on a newly established medulloblastoma cell line, UM-MB1. This predominantly adherent cell line has a mean doubling time of 39.3 hours and was found, by karyotypic analysis, to be near triploid. UM-MB1 consists of undifferentiated cells expressing markers of neuronal lineage such as the three neurofilament subunits as well as neuron-specific enolase, synaptophysin, and microtubule-associated proteins 1 and 5. In contrast, no immunoreactivity for glial fibrillary acidic protein was evident. When exposed to nanomolar amounts of bFGF, UM-MB1 cells began to extend neurite-like processes with arborizations and growth-cone-like structures. In addition, UM-MB1 cells treated with bFGF exhibited ultrastructural alterations that reflect their enhanced differentiation as well as the increased expression of at least one of the neurofilament subunits as evidenced both immunocytochemically and on Western blots. Furthermore, bFGF significantly decreased UM-MB1 cell growth as well as induced their death. UM-MB1 cells treated with bFGF for several days displayed DNA cleavage, nuclear shrinkage, and chromatin condensation while retaining their cytoplasmic and mitochondrial membrane integrity, all early indices of apoptosis. After this, cell death was evident with the concomitant appearance of the classical apoptotic bodies. By flow cytometry, bFGF was found to increase the proportion of cells in G1 before inducing their death by apoptosis. In conclusion, UM-MB1 cells can, when appropriately stimulated, be induced to differentiate along their neuronal lineage pathway. Their differentiation induced by bFGF, although incomplete, appears to promote or inhibit the expression of apoptotic effectors or suppressors in these cells, respectively, so to induce their death by an apoptotic-like mechanism. Images Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 9 Figure 10 Figure 11 Figure 12

Kenigsberg, R. L.; Hong, Y.; Yao, H.; Lemieux, N.; Michaud, J.; Tautu, C.; Theoret, Y.

1997-01-01

111

Jets and Outflows from Young Stellar Objects in the Carina Nebula Observed in [Fe II] 1.64 um  

NASA Astrophysics Data System (ADS)

We present [Fe II] 1.64 um imaging observations for jets and outflows from young stellar objects (YSOs) over the northern part (~24'x45') of the Carina Nebula, a massive star forming region. The observations were performed with IRIS2 of Anglo-Autralian Telescope and the seeing was ~1.5". Several jets and outflows features are detected at eight different regions, and named as forbidden emission line regions (FELRs). One new candidate for Herbig-Haro Object is identified comparing our [Fe II] images to H_alpha images of Hubble Space Telescope. FELRs have knotty or longish shapes, and distribute around the triangular area formed by three star clusters Tr 14, Tr 15, and Tr 16, which contain many massive stars. The detection rate of FELRs against previously identified YSOs is 1.4 %. We estimate the outflow rate from the [Fe II] flux based on some assumptions. The jet-driving objects are identified for three FELRs (FELR-2, -4, and -7), for which we study the relations between the outflow rate and the YSO physical parameters from the radiative transfer model fitting. The ratios of the outflow rate over the disk accretion rate are consistent for FELR-4 and -7 with the previously reported values, while it is higher for FELR-2. The masses of jet-driving objects are low or intermediate, and they are not likely to become massive stars (> 8 Ms). Other YSO physical parameters, such as luminosity and age, show reasonable relations or trends.

Shinn, Jong-Ho; Pyo, Tae-Soo; Lee, Jae-Joon; Lee, Ho-Gyu; Kim, Hyun-Jeong; Koo, Bon-Chul; Sung, Hwankyung; Chun, Moo Young; Lyo, A.-Ran; Moon, Dae-Sik; Kyeong, Jaemann; Park, Byeong-Gon; Hur, Hyeonoh; Lee, Yong-Hyun

2013-07-01

112

Decor(um)  

Microsoft Academic Search

Over the years the profession of interior design has struggled with its identity and place in the professional world of design. Practitioners and educators have conscientiously worked to distance themselves from the seemingly unattractive and `unprofessional' parts of the field, namely decoration and ornamentation. It seems, however, that no matter what steps are taken to redefine the profession and separate

Sarah Elizabeth Zenti

2011-01-01

113

InP-based monolithic integration of 1.55-um MQW laser diode and HBT driver circuit  

NASA Astrophysics Data System (ADS)

An improved fabrication process and related experiment results of an InP-based monolithic integrated transmitter OEIC with a 1.55 micrometers MQW laser diode (LD) and an InP/InGaAs heterojunction bipolar transistors (HBT) driver circuit are presented. The epitaxial structure of the laser and driver circuits were continuously grown on semi- insulating Fe-doped InP substrate by a metal-organic chemical vapor deposition system using a vertically integration. HCL, H3PO4/H2O2 and HBr/HNO3 solution system were involved as selective or nonelective wet chemical etching respectively for the epitaxies of InP, InGaAs and InGaPAs. Both a nearly-standard contact photolithography depending on a two-step exposure technique and an electrical connection related to smoothly wet chemical etching profile of InP and InGaP in the crystal direction of (01-1) were developed in the process. The laser diode with a 3-um-wide ridge waveguide forming by a double- groove process self-aligned to the metal contact of P-type region showed an average threshold current as low as about 10mA. The HBT with a 120-nm-thick base layer performed a DC current gain of about 60-70 and an emitter-collector breakdown voltage of up to 4-5V. A clear eye diagram of the monolithic transmitter under a pulsed operation with 622Mbit/s bitrate nonreturn-to-zero pseudorandom code was obtained.

Li, Xian-Jie; Zhao, Fang-Hai; Zeng, Qing-Ming; Dong, Yi; Li, Xu-hui; Yang, Shu-Ren; Cai, Ke-Li; Wang, Benzhong; Ao, Jin-Ping; Liang, Chun-Guang; Liu, ShiYong

2000-04-01

114

49. Evaluation of Catheter-Based Deliveries of 10um Gelatin Hydrogel Microsphere, a Novel Non-Viral Vehicle, in a Porcine Heart  

Microsoft Academic Search

Background: Biodegradable Gelatin hydrogel microsphere (GHM) has been reported as a novel non-viral vehicle for gene or protein therapy. However, it is unknown what catheter-based strategy is effective for the GHM delivery to the heart.Objectives: The purpose of this study was to evaluate catheter-based deliveries of 10um GHMs to the heart, by comparing the characteristics of the uptake, and by

Kozo Hoshino; Ryuichi Yoneyama; Yoshiaki Kawase; Alec M. DeGrand; John V. Frangioni; Yasuhiko Tabata; Takeshi Kimura; Toru Kita; Roger J. Hajjar; Motoya Hayase

2005-01-01

115

Retrieval of Middle Atmospheric Water Vapor From Measurements of 6.8um Earth Limb Emission Under Non-LTE Conditions  

Microsoft Academic Search

The SABER instrument on TIMED will measure 6.8um limb emission for the purpose of retrieving water vapor profiles over the range from approximately 15 to 80 km tangent height. We present a new accurate and efficient algorithm for retrieving middle atmospheric water vapor from measurements of limb emission, which rigorously includes non-local thermodynamic equilibrium (non-LTE) processes in the forward radiance

C. J. Mertens; M. G. Mlynczak; M. Lopez-Puertas; E. E. Remsberg; L. L. Gordley; J. M. Russell

2002-01-01

116

Nucleotide Sequence oftheTranscriptional Control Region ofthe Osmotically Regulated proUOperonofSalmonella typhimurium and Identification ofthe5'Endpoint oftheproUmRNA  

Microsoft Academic Search

fragment thatcontains the transcriptional control region oftheproUoperonandthecoding sequencesspecifying 290aminoacids ofthe first structural geneoftheoperon was determined. Thepredicted aminoacid sequenceoftheproduct ofthis geneshowsextensive similarity totheHisP,MaIK,andother proteins that areinner membrane-associated components ofbinding protein-dependent transport systems. SImapping andprimer extension analysis ofthe proUmRNAsrevealed several species withdifferent 5'ends. Twoofthese endpoints are sufficiently close to sequencesthathaveweaksimilarities totheconsensus-35and-10 promoter sequencesthattheyare likely todefine twotranscription start sites. However, we cannotrule outthepossibility

DAVID G. OVERDIER; ERIC R. OLSON; BRUCE D. ERICKSON; MARTINA M. EDERER; LASZLO N. CSONKAl

1989-01-01

117

Precision control of poly-gate CD by local OPC for elimination of microloading effect on 0.13-um CMOS technology  

Microsoft Academic Search

The yield impact by local non-uniformity of poly-gate CD, edge profile, and transistor performance (between larger pitch area and minimum pitch area) is no longer tolerable in advanced CMOS technology as illustrated in a 2M SRAM vehicle processed by 0.13um flow in this paper. Micro-loading effects shall be minimized for process steps in poly-gate loop (including poly patterning, hard-mask etching,

Tzy-Kuang Lee; Yao-Ching Wang; Min-hwa Chi; C. Y. Lu; C. H. Hsieh; R. G. Liu; H. J. Liao; S. S. Yang; Chih-Hao Chang

2003-01-01

118

Transformações sociais - Mudanças psíquicas: uma possível relação. Estudo qualitativo sobre a condição feminina. * Social Transformations - Psychical changes: a possi ble relation. A qualitative study on the feminine condition  

Microsoft Academic Search

Resumo: Este estudo têm como objetivo analisar a relação da s possíveis mudanças psíquicas na mulher, a partir das inúmeras transformações sociais ocorridas nos últimos anos n a condição feminina. A pesquisa foi realizada com metodologia qualitativa. Como técnica de investigação, foi adotada a entrevis ta psicológica em sua forma aberta. Foram analisado s três casos. A compreensão das entrevistas

Bianca S. RODRIGUES; Maria Emília; L. SILVA

119

A newly discovered DLA and associated Ly? emission in the spectra of the gravitationally lensed quasar UM673A,B  

NASA Astrophysics Data System (ADS)

The sightline to the brighter member of the gravitationally lensed quasar pair UM673A,B intersects a damped Ly? system (DLA) at z = 1.62650 which, because of its low redshift, has not been recognized before. Our high-quality echelle spectra of the pair, obtained with HIRES on the Keck I telescope, show a drop in neutral hydrogen column density N(HI) by a factor of at least 400 between UM673A and UM673B, indicating that the DLA's extent in this direction is much less than the 2.7 h-170kpc separation between the two sightlines at z = 1.62650. By re-assessing this new case together with published data on other quasar pairs, we conclude that the typical size (radius) of DLAs at these redshifts is R ~= (5 +/- 3) h-170kpc, smaller than previously realized. Highly ionized gas associated with the DLA is more extended, as we find only small differences in the CIV absorption profiles between the two sightlines. Coincident with UM673B, we detect a weak and narrow Ly? emission line which we attribute to star formation activity at a rate SFR >~ 0.2Msolaryr-1. The DLA in UM673A is metal poor, with an overall metallicity ZDLA ~= 1/30Zsolar, and has a very low internal velocity dispersion. It exhibits some apparent peculiarities in its detailed chemical composition, with the elements Ti, Ni and Zn being deficient relative to Fe by factors of 2-3. The [Zn/Fe] ratio is lower than those measured in any other DLA or Galactic halo star, presumably reflecting somewhat unusual previous enrichment by stellar nucleosynthesis. We discuss the implications of these results for the nature of the galaxy hosting the DLA. Based on data obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and NASA, and was made possible by the generous financial support of the W. M. Keck Foundation. E-mail: rcooke@ast.cam.ac.uk

Cooke, Ryan; Pettini, Max; Steidel, Charles C.; King, Lindsay J.; Rudie, Gwen C.; Rakic, Olivera

2010-12-01

120

Modelling the 11.2 um Unidentified Infrared Band using Ethylene Oxide (c-C2H4O) and Cyclopropenylidene (c-C3H2)  

NASA Astrophysics Data System (ADS)

We suggest that small carbonaceous molecules (SCMs) may be the sources of the unidentified infrared bands (UIR) and the underlying continuum. We show that the IR spectroscopy of ethylene oxide (EO, c-C2H4O) and cyclopropenylidene (CP, c-C3H2) closely correlates with the major UIR bands at 3.3, 6.2, 7.7, 8.6, and 11.2 um, the often seen strong bands at 12.7 and 16.4 um, as well as many minor features. The differences in band locations and shapes between laboratory EO absorption spectra and astrophysical UIR emission spectra are attributed to vibrational anharmonicity, Fermi resonance splitting of nearly degenerate vibration levels, and rotational envelop narrowing due to the low temperatures in space. The excitation mechanism is absorption of UV radiation, primarily Ly-alpha, by SCMs. Photon trapping for this very optically thick transition enhances the absorption by several orders of magnitude. Our abundance analysis for NGC 7027 reveals that the SCM abundance, relative to H2, is 3E-9 which compares well to radio measurements of the CP abundance range of 1E-9 - 1E-7. Radio lines of CP have been seen in numerous astronomical objects, most displaying the UIR bands. EO is also seen, but in fewer objects, none displaying the UIR bands. We theorize that in UIR objects, EO is formed on, and primarily resides on, carbonaceous grains, precluding radio detection of rotational lines. We present a detailed spectral analysis of the 11.2 um UIR band and its associated continuum. An asymmetric top rotational model is used to fit the feature profiles observed from a variety of astrophysical objects. We show that the narrower 11.2 um feature can be fit based on EO or CP rotational constants at a temperature around 10 K and the broader continuum corresponds to 200 K. We suggest laboratory experiments, astronomical observations, and theoretical investigations to further evaluate the SCM mechanism.

Bernstein, Lawrence; Lynch, D.

2010-01-01

121

INFLUÊNCIA DO MATERIAL IMPERMEABILIZANTE RADICULAR NA INFILTRAÇÃO MARGINAL COM AZUL DE METILENO THE INFLUENCE OF THE RADICULAR IMPERMEABLE MATERIAL IN THE MICROLEAKAGE OF THE BLUE METHYLENE  

Microsoft Academic Search

RESUMO A obturação do canal radicular visa um perfeito selamento. Contudo, possíveis falhas podem propiciar infiltração de microrganismos e levar ao insucesso do tratamento. Com o intuito de detectar a solução de continuidade entre o material obturador e a parede do conduto, podem ser utilizados vários modelos experimentais e materiais obturadores. Um dos modelos é a microinfiltração de corantes em

João Eduardo GOMES-FILHO; Pedro Felício; Estrada BERNABÉ; Roberto HOLLAND; Valdir SOUZA; Mauro Juvenal NERY; José Arlindo; OTOBONI FILHO; Eloi DEZAN JUNIOR; Karine TAKAHASHI; Mariana Machado; Teixeira de Moraes

122

Análisis de Variabilidad con Modelos de Objetivos  

Microsoft Academic Search

Dentro del campo de la variabilidad, o la habilidad de cambio o personalización de un sistema, no es común que dicha variabilidad se tenga en cuenta en la definición de requisitos. En las propuestas donde si se contemplan se utilizan directamente features, aunque no son una técnica de elicitación de requisitos, sino que más bien están a medio camino entre

Bruno González-Baixauli; Miguel A. Laguna; Sampaio do Prado

2004-01-01

123

Modelos de Proteção Comercial: uma Resenha  

Microsoft Academic Search

Protectionism has been an enduring source of international disputes since at least the nineteenth century. In the last decades, an array of nontariff barriers has created a new global phenomenon, the so-called New Protectionism, which once more shows the strength of the forces leading to the adoption of trade barriers by nations. This article aims to review representative analytical models

RENATO COLISTETE; JARBAS DANTAS MENEZES

2004-01-01

124

User's manual (UM) for the enhanced logistics intratheater support tool (ELIST) software segment version 8.1.0.0 for solaris 7.  

SciTech Connect

This document is the User's Manual (UM) for the Enhanced Logistics Intratheater Support Tool (ELIST) Software Segment. It tells how to use the end-user and administrative features of the segment. The instructions in Sections 4.2.1, 5.3.1, and 5.3.2 for the end-user features (Run ELIST and Run ETEdit) only cover the launching of those features in the DII COE environment; full details on the operation of ELIST and ETEdit in any environment can be found in the documents listed in Section 2.1.3 and referenced elsewhere in this document. On the other hand, complete instructions for the administrative features (Add Map Data and Delete Map Data) are presented in Sections 4.2.2, 5.3.3, and 5.3.4 of this document.

Dritz, K.

2002-03-06

125

Structural, magnetic and electrical properties of some uranium ternary germanides: UM2Ge2 (M = Rh, Ir) and U4M7Ge6 (M = Ru, Os)  

NASA Astrophysics Data System (ADS)

The crystal structures and the physical properties of U4M7Ge6 (M = Ru, Os) and UM2Ge2 (M = Rh, Ir) have been investigated. The former crystallize in the cubic structure of U4Re7Si6; U4Ru7Ge6 orders ferromagnetically at TC ~ 10-13 K whereas U4Os7Ge6 remains paramagnetic down to 4.2 K. The latter whise structures derive from the tetragonal ThCr2Si2 or CaBe2Ge2 types display limited homogeneity ranges; URh2Ge2 exhibits a dense-Kondo behaviour at low temperatures; UIr2Ge2 shows polymorphism and its physical properties are strongly influenced by its crystal structure.

Lloret, B.; Buffat, B.; Chevalier, B.; Etourneau, J.

1987-06-01

126

ADOÇÃO DE NOVOS PARADIGMAS NA ORGANIZAÇÃO E GESTÃO DE EMPREENDIMENTOS SOLIDÁRIOS: UM ESTUDO SOBRE O PROCESSO PRODUTIVO DO AÇAÍ ATRAVÉS DAS ASSOCIAÇÕES E COOPERATIVAS NO TERRITÓRIO RURAL DO BAIXO TOCANTINS – PARÁ – BRASIL  

Microsoft Academic Search

As transformações no mundo do trabalho vividas, desde o final da década de 60, pelos países capitalistas e os impactos daí resultantes sobre a reestruturação do sistema produtivo têm definido novas práticas produtivas, que precarizam as relações de trabalho, favorecem o desemprego, baixos salários e exigem novas e melhores qualificações dos trabalhadores. Nesse contexto, estes se vêem diante de um

Lucia Cristina Andrade; Roselene Souza Portela; Euzalina Silva Ferrao; Armando Lirio Souza; Adebaro Alves Reis

2008-01-01

127

Educação continuada: um levantamento de necessidades da equipe de enfermagem 1 Lifelong learning: a survey on the nursing team necessities Educación continuada: un diagnóstico de necesidades del equipo de enfermería  

Microsoft Academic Search

RESUMO: A Educação Continuada é o componente essencial dos programas de formação e desenvolvimento de recursos humanos das instituições. O desenvolvimento da equipe de enfermagem é um dos fatores que pode assegurar a qualidade do atendimento ao cliente e a sobrevivência da instituição neste cenário de mudanças e competitividade. Assim, neste estudo fizemos alguns diagnósticos através do levantamento de necessidades

Milena Froes da Silva; Fabiana Alves da Conceição; Maria Madalena Januário Leite

128

Liderança, Coesão e Satisfação em Equipas Desportivas: Um Estudo com Atletas Portugueses de Futebol e Futsal Leadership, Cohesion and Satisfaction in Sporting Teams: A Study with Portuguese Football and Futsal Athletes  

Microsoft Academic Search

Resumo Este trabalho foi realizado com 200 atletas de duas modalidades (futebol e futsal) incluídos em vários escalões desportivos e analisa a liderança dos treinadores e a coesão e satisfação dos praticantes. Para tal, utilizámos um protocolo de avaliação, com instrumentos de avaliação da liderança (Escala Multidimensional de Liderança, que avalia seis dimensões), da coesão (Questionário de Coesão em Equipas

A. Rui Gomes; Ana Patricia Pereira; Ana Raquel Pinheiro

129

Etching characteristics of organic low-k dielectrics in the helicon-wave plasma etcher for 0.15-um damascene architecture  

NASA Astrophysics Data System (ADS)

The comparative analysis of the dry etching of FLARE 2.0 and a- C:F, which represent two different depositions techniques of organic low-k polymers was investigated. In our damascene architecture, the etchings to player or hard-mask of both SIOF; SiO2 was studied. Especially, the SiOF providing lower dielectric constant than SIO2 would reduce entire effective dielectric constant. The etch rate and etching rate selectivity was optimized by changing content ratio between CHF3, N2 and O2. Furthermore, the bias power, RF power; and gas flows were changed to control the etch profile. The SEM result showed that the better etch profile can be obtained at higher bias power. There were some deviation between etching rate of blanket with the case of patterned wafer. The distribution density of the reactant etching gas in sub-um gap different from blanket surface of wafer was major dynamics. Due to this phenomena, the etching rate became nonlinear function of process time Tetch in the trenches/vias with smaller dimension.

Shieh, Jia-Min; Wei, T. C.; Liu, C. H.; Suen, Shich-Chang; Dai, Bau-Tong

2000-08-01

130

Project UM-HAUL (UnManned Heavy pAyload Unloader and Lander): The design of a reusable lunar lander with an independent cargo unloader  

NASA Astrophysics Data System (ADS)

Project UM-Haul is the preliminary design of a reusable lunar transportation vehicle that travels between a lunar parking orbit and the lunar surface. This vehicle is an indispensible link in the overall task of establishing a lunar base as defined by the NASA Space Exploration Initiative. The response to this need consists of two independent vehicles: a lander and an unloader. The system can navigate and unload itself with a minimum amount of human intervention. The design addresses structural analysis, propulsion, power, controls, communications, payload handling and orbital operations. The Lander has the capacity to decend from low lunar orbit (LLO) to the lunar surface carrying a 7000 kg payload, plus the unloader, plus propellant for ascent to LLO. The Lander employs the Unloader by way of a motorized ramp. The Unloader is a terrain vehicle capable of carrying cargoes of 8,500 kg mass and employs a lift system to lower payloads to the ground. The system can perform ten missions before requiring major servicing.

1991-04-01

131

Ho-Nee-Um Trail.  

ERIC Educational Resources Information Center

|Appreciation and concern for the preservation of our natural resources by all citizens is the primary concern of this teacher's guide for use in the elementary grades. It employes the use of a filmstrip in conjunction with a local nature trail, to guide students in developing awareness - by looking closely, listening, touching, and smelling.…

Irwin, Harriet; And Others

132

Statistical Analyses of La, Ce, Nd, Y, Nb, Ti, P, and Zr in Bedrocks and Their Significance in Geochemical Exploration at the Um Garayat Gold Mine Area, Eastern Desert, Egypt  

Microsoft Academic Search

A prospective lithochemical survey (scale 1:50,000) was carried out at the Um Garayat gold mine area within the central wadi\\u000a Allaqi shear zone. The metavolcanic samples were analyzed for Ti, P, Zr, Nb, Y, La, Nd, and Ce. The background and threshold\\u000a values were determined using histograms, box-plots, and Q-mode cluster analysis. Discriminant analysis classifies the samples\\u000a into four groups:

Ahmed M. El-Makky

2011-01-01

133

Implementation of the Fast-JX Photolysis scheme (v6.4) into the UKCA component of the MetUM chemistry-climate model (v7.3)  

NASA Astrophysics Data System (ADS)

Atmospheric chemistry is driven by photolytic reactions, making their modelling a crucial component of atmospheric models. We describe the implementation and validation of Fast-JX, a state of the art model of interactive photolysis, into the MetUM chemistry-climate model. This allows for interactive photolysis rates to be calculated in the troposphere and augments the calculation of the rates in the stratosphere by accounting for clouds and aerosols in addition to ozone. In order to demonstrate the effectiveness of this new photolysis scheme we employ new methods of validating the model, including techniques for sampling the model to compare to flight track and satellite data.

Telford, P. J.; Abraham, N. L.; Archibald, A. T.; Braesicke, P.; Dalvi, M.; Morgenstern, O.; O'Connor, F. M.; Richards, N. A. D.; Pyle, J. A.

2013-02-01

134

ANTROPOMETRIA EM BIOMECÂNICA: CARACTERÍSTICAS, PRINCÍPIOS E MODELOS ANTROPOMÉTRICOS  

Microsoft Academic Search

Due to the importance of interdisciplinarity and multidisciplinarity to the complex analysis of human movement, and in an attempt to seek to bring Kinanthropometry and Biomechanics closer together, through anthropometry, this review article was compiled in order to: present the historical evolution of anthropometry and the theoretical presuppositions on which its anthropometric models are based; to present anthropometry as a

Ponto de Vista; Sebastião Iberes; Lopes Melo; Saray Giovana

135

7 Tipos de modelos, pautas y otras ayudas  

Center for Food Safety and Applied Nutrition (CFSAN)

Text Version... Dolor de garganta con fiebre SÍ / NO _____ O ... Anteriormente: ¿Ha sido diagnosticado con fiebre tifoidea (S. Typhi)? SÍ / NO ... More results from www.fda.gov/downloads/food/guidanceregulation

136

Modelos de empresa multinacional democrática o cooperativa1  

Microsoft Academic Search

In this paper we analyse the possible ways of developing another model of multinational enterprise from three points of view: firstly, we analyse the role that can be played by the codes of conduct as complementary instruments for designing an the social policy of the internationalised cooperatives; in second place, we briefly look at the intercooperative multinational or global cooperative

ANJEL MARI ERRASTI AMOZARRAIN; Euskal Herriko Unibertsitatea

137

Abdução e antecipação na construção do significado musical  

Microsoft Academic Search

Resumo: Este artigo apresenta o conceito de antecipação, conforme descrito por David Huron, e o relaciona com o conceito de raciocínio abdutivo, ou abdução, segundo a filosofia de Charles Sanders Peirce, para a construção de um modelo de significado musical. A antecipação, enquanto fenômeno cognitivo, é entendida aqui a partir de uma perspectiva biológica e adaptativa; a antecipação é um

Luis Felipe Oliveira; Jônatas Manzolli

2008-01-01

138

EVALUATION OF LOGISTIC PERFORMANCE OF WOOD HAULING USING PETRI NET IN A FOREST INDUSTRY OF MINAS GERAIS  

Microsoft Academic Search

RESUMO - Este trabalho teve por objetivo utilizar o modelo de avaliação do desempenho logístico de cadeias produtivas (ADELCAP) centrado nos tempos dos elementos do ciclo operacional do transporte de madeira, visando otimizar os recursos, garantir um fluxo contínuo de abastecimento e assegurar um volume adequado de entrada de madeira na fábrica. O ciclo operacional de transporte de madeira é

Raiane Ribeiro Machado; Márcio Lopes da Silva; Carlos Cardoso Machado; Helio Garcia Leite

2006-01-01

139

Adequação do consumo de ferro por gestantes e mulheres em idade fértil atendidas em um serviço de pré-natal Adequacy of iron consumption in pregnant and fertile women assisted by a prenatal service Adecuación del consumo de hierro por mujeres embarazadas y fértiles asistidas por un servicio prenatal  

Microsoft Academic Search

ReSumo: Anemia por carência alimentar de ferro é o problema nutricional mais prevalente em nível de saúde coletiva e afeta crianças e mulheres em idade reprodutiva, em especial as gestantes. Este estudo avaliou o consumo de alimentos fontes de ferro, naturais e fortificados, e a adequação de energia e nutrientes de mulheres em idade reprodutiva, gestantes ou não. Desenvolveu-se um

Juliana Moreira Lino Viana; Adriana Uehara Santos; Maria Alice Tsunechiro; Ana Paula; Sayuri Sato; Isabel Bonadio; Sophia Cornbluth Szarfarc; Elizabeth Fujimori

140

2-MASS sources with 12um excesses  

NASA Astrophysics Data System (ADS)

We will observe 14 main-sequence stars with 12 micron excesses, indicating the presence of warm (temperature of order 300 K) circumstellar dust debris disks. We discovered these systems using 2MASS J, H, Ks photometry, to estimate photospheric SEDs, and IRAS FSC or SSC 12 micron photometry. The dust is located at about 1--10 AU from the stars, in possible asteroidal clouds. We will obtain IRAC 3.6, 4.5, 5.8, and 8 micron very precise photometry (S/N > 100) to search for the hottest dust, and therefore the innermost edge, of the disks. Through IRS 5.3--21.8 micron spectroscopy (S/N > 20) we will search for PAH 6.2, 7.7, 8.6, and 11.3 micron features, and 10 and 20 micron silicate emission features. We will also search for colder dust, more distant from the stars, in Kuiper Belt-like regions, through MIPS 24 micron photometry (S/N > 20).

Werner, Michael; Fajardo-Acosta, Sergio

2004-09-01

141

350um polarimetry from CSO (Dotson+, 2010)  

NASA Astrophysics Data System (ADS)

The instrument, calibrations, and data analysis techniques have been described in detail by Schleuning et al. (1997PASP..109..307S), Dowell et al. (1998ApJ...504..588D), and Kirby et al. (2005PASP..117..991K). Table 1 lists the coordinates, observing dates, peak intensities and size and range of directions of the chop used for each object. (3 data files).

Dotson, J. L.; Vaillancourt, J. E.; Kirby, L.; Dowell, C. D.; Hildebrand, R. H.; Davidson, J. A.

2010-04-01

142

Amamentação: um híbrido natureza-cultura  

Microsoft Academic Search

Objective: To contribute to the creation of a new theoretical synthesis about the relationship between the biological and social dimensions of breastfeeding, categorizing it as a nature-nurture hybrid. Sources of data: The methodological approach of the present article was based on the qualitative health research frame, and data were analyzed on the basis of dialectic-hermeneutic principles. Primary sources, comprising historical

João Aprigio Guerra de Almeida; Franz Reis Novak

2004-01-01

143

Direito à saúde: um convite à reflexão  

Microsoft Academic Search

This study focuses on changes and breaks in contemporary society relating to the right to healthcare as a universal value, in conformity with the guidelines provided by multilateral agencies and disseminated particularly since the 1990s. From the genesis of social rights and by tracing the interdependence between social and economic aspects of social citizenship in democratic capitalist countries, the study

Vera Maria Ribeiro Nogueira; Denise Elvira Pires de Pires

2004-01-01

144

Estatística de lentes gravitacionais e o gás de chaplygin generalizado  

NASA Astrophysics Data System (ADS)

A estatística de lentes gravitacionais constitui uma poderosa ferramenta utilizada na obtenção de vínculos sobre parâmetros cosmológicos, principalmente sobre modelos com uma constante cosmológica. Embora de forma às vezes controversa, antes de 1998, a análise tradicional mostrava que modelos com o parâmetro de densidade da matéria da ordem da unidade são preferidos. Esse resultado começou a ser questionado, alguns anos atrás, com as indicações, advindas da análise de supernovas com alto valor de desvio para o vermelho, de que nosso Universo está acelerando. Atualmente há enorme interesse em saber qual é a natureza da componente responsável pela aceleração cósmica. Energia escura é a denominação usual dessa componente e sua característica principal é possuir pressão negativa. Nos modelos cosmológicos tradicionais, além da energia escura, considera-se também uma outra componente de origem desconhecida. Ela é denominada matéria escura e possui pressão nula. Mais recentemente modelos unificadores em que energia escura e matéria escura são manifestações distintas de um mesmo fluido (altas densidades matéria escura, baixas densidades energia escura) foram sugeridos. Um desses modelos é conhecido como Gás de Chaplygin Generalizado que é o modelo que investigaremos. Em nosso trabalho apresentamos vínculos sobre parâmetros desse modelo usando a estatística de lentes gravitacionais. Usamos observações de quasares na faixa do visível e consideramos extinção em nosso estudo. Análises semelhantes anteriores com esse tipo de objetos e que não consideram extinção são inconsistentes. Comparação dos vínculos obtidos através de lentes gravitacionais com outros advindos de outros testes será também apresentada.

Oliveira, A. L. S.

2003-08-01

145

Estudo de não gaussianidade nas anisotropias da RCF medidas Wmap  

NASA Astrophysics Data System (ADS)

A investigação do campo de flutuações da Radiação Cósmica de Fundo (RCF) pode oferecer um importante teste para os modelos cosmológicos que descrevem a origem e a evolução das flutuações primordiais. De um lado, apresenta-se o modelo inflacionário que prevê um espectro de flutuações adiabáticas distribuídas segundo uma gaussiana e, de outro, os modelos de defeitos topológicos (dentre outros) que descrevem um mecanismo para a geração de flutuações de isocurvatura que obedecem a uma distribuição não gaussiana. Este trabalho tem como objetivo caracterizar traços do modelo não gaussiano de campo misto (entre flutuações adiabáticas e de isocurvatura) nos mapas do Wilkinson Microwave Anisotropy Probe (WMAP). Simulações das anisotropias da RCF no contexto de mistura indicam traços marcantes na distribuição das flutuações de temperatura, mesmo quando consideradas pequenas contribuições do campo de isocurvatura (da ordem de 0.001). O efeito da mistura entre os campos resulta na transferência de potência de flutuações em escalas angulares intermediárias para flutuações em pequenas escalas angulares. Este efeito pode ser caracterizado pela relação entre as amplitudes dos primeiros picos acústicos no espectro de potência da RCF. Neste trabalho, investigamos a contribuição do campo de isocurvatura, no contexto de mistura, sobre as observações recentes da RCF realizadas pelo WMAP. As previsões do modelo de campo misto, uma vez confrontadas com as observações em pequenas escalas angulares, podem ajudar a revelar a natureza das flutuações primordiais.

Andrade, A. P. A.; Wuensche, C. A.; Ribeiro, A. L. B.

2003-08-01

146

O perfil de clientes de um shopping center: um estudo exploratório com consumidores do interior  

Microsoft Academic Search

The study was carried out in a Minas Gerais' inland city, so as to get acquainted with the profile and habits of its clients. This research is innovative as it approaches as customer the citizen of an inland town. The objective of this work was to identify the groups of customers taking into consideration their level of satisfaction as well

Daniela Meireles de Andrade

147

Laser damage testing for ion beam sputtered optical coatings at 2 um and 3 um  

NASA Astrophysics Data System (ADS)

Precision Photonics Corporation (PPC) has developed high Laser Damage Threshold (LDT) coatings for the important 2-3?m spectral region. Accurate information for both LDT and absorption for such coatings is sparse and often unreliable, especially when compared to the huge amount of information for these parameters in the 1?m spectral region. The goal of this effort is to provide useful, accurate information for high power/energy coatings, given the limited LDT and absorption testing capabilities for the 2-3?m region. In this paper, we present data for 2?m pulsed LDT, 2?m absorption, 3?m pulsed LDT, and Continuous Wave (CW) LDT data.

Wood, Chris; Carpenter, Derrick; Lyngnes, Ove

2011-05-01

148

Regras Monetárias e Dinâmica Macroeconômica no Brasil: Uma Abordagem de Expectativas Racionais  

Microsoft Academic Search

Neste artigo estimamos e simulamos um modelo macroeconômico aberto de expectativas racionais (Batini e Haldane (5)) para a economia brasileira, com o objetivo de identificar as características das regras monetárias óti- mas e a dinâmica de curto prazo gerada por elas. Trabalhamos com uma versão forward-looking e uma versão backward-looking a fim de comparar o desempenho de três parametrizações de

Marco Antonio Cesar Bonomo; Ricardo D. Brito

2002-01-01

149

Detecção Cooperativa de Intrusões em Redes Carrier Ethernet  

Microsoft Academic Search

Resumo Hoje em dia os elementos de rede (NEs) da camada 2 do modelo OSI, bridges ou switches, são componentes complexos, com centenas de milhares de linhas de software, que podem ser vulneráveis a ataques, permitindo até a execução remota de código no seu CPU interno. Este trabalho apresenta um esquema para proteger infra-estruturas de rede Carrier Ethernet de ataques

Pan Jieke; João Redol; Miguel Correia

150

A teoria da percolação aplicada às galáxias aneladas peculiares  

Microsoft Academic Search

Formulado no final da década de 50, o modelo de percolação concentra-se em descrever o meio poroso, que será visto neste trabalho como uma rede de canais aleatórios, por onde escoa um fluido determinístico. Se o número de canais for suficientemente grande, então eles estarão ligados e o meio se tornará permeável à passagem do fluido. Neste caso, dizemos que

P. C. R. Poppe; V. A. F. Martin; N. G. F. de Medeiros; M. Faúndez-Abans; M. Oliveira-Abans

2003-01-01

151

Comparative research on medicine application with 0.53-um, 1.06-um, and 1.32-um Nd:YAG lasers  

NASA Astrophysics Data System (ADS)

Because of its high power and excellent optical features, laser has almost been applied to everywhere of medical research and clinic. Over the past several years, laser medical has achieved a rapid progress, and laser medical instruments has developed promptly, each new wavelength can be successfully applied in diagnostic and treatment of diseases. Among the medical lasers, Nd:YAG solid-state laser systems have proven useful in surgical use operate, such as neurosurgery, gastroenterology, cardioangiology, urology, gynecology, dermatology and ENT. As with other solid-state lasers, the Nd:YAG laser can be made to emit various wavelengths by means of suitable resonator configurations and some newest solid-state laser technology, pumped by the Krypton lamp, the Nd:YAG laser at room temperature exhibits transition at 1.06 micrometer Nd:YAG, using nonlinear crystal and Q-switch to double its frequency can attain 0.53 micrometer green beam. In our laser systems, the efficiency at 1.06 micrometer is more than 3 percent, an efficiency of 0.5 percent at 1.32 micrometer and 0.53 micrometer can be attained. For a power of 100w at 1.06 micrometer, 15w at 1.32 micrometer and 0.53 micrometer can therefore be produced. All of three kinds Nd:YAG laser hold these characteristics: high output power; optical fiber transition that can be cooperated with endoscope. The paper mainly discusses laser operating characteristics and clinic applications of three kinds wavelengths at 0.53 micrometer 1.06 micrometer and 1.32 micrometer Nd:YAG laser systems.

Li, Yahua; Li, Zhenjia; Zhu, Changhong; Huang, Yizhong

1996-09-01

152

Aquecimento alfvênico viscoso-resistivo em discos de acresção ao redor de estrelas T Tauri clássicas  

NASA Astrophysics Data System (ADS)

Com a crescente disponibilidade de dados observacionais sobre estrelas T Tauri, a busca por modelos mais precisos vem se tornando cada vez maior. Estes modelos devem explicar, entre outras coisas, o mecanismo dissipativo responsável pelo transporte de momento angular no disco de acresção que acredita-se, circunda estas estrelas. O mecanismo mais viável, do ponto de vista teórico, é uma instabilidade MHD conhecida como "instabilidade magnetorotacional ou Balbus-Hawley" (IBH). Esta instabilidade veio mostrar que o campo magnético desempenha um papel importante na evolução destes objetos mas requer, no entanto, um acoplamento mínimo entre o gás e o campo magnético no disco que não é atingido para os valores de temperatura obtidos do modelo padrão. Contudo, alguns mecanismos de aquecimento para o disco precisam ser examinados. Neste trabalho, propomos a dissipação de ondas Alfvén como uma fonte de aquecimento para o disco. Se o gás apresentar uma condutividade elétrica finita e viscosidade, teremos um tipo de amortecimento para as ondas denominado amortecimento viscoso-resistivo que será aqui considerado. Este mecanismo é aplicado ao modelo de disco em camadas. Calculam-se as taxas de aquecimento Alfvênico, a temperatura efetiva do disco bem como as taxas de ionização decorrentes deste aquecimento e do aquecimento gerado pela absorção de raios cósmicos. Comparações com os dados observacionais de Kitamura et. al. (2001) são efetuadas, ressaltando-se os pontos comuns entre suas observações e nossos dados teóricos.

Santana, W. M.; Vasconcelos, M. J.

2003-08-01

153

Las redes sociales trastocan los modelos de los medios de comunicación tradicionales  

Microsoft Academic Search

The fast and successful penetration in society of the so-called social networks in the past two or three years has alarmed the traditional media. The new phenomenon reaches a wider audience, enhances advertising, achieves customization, and breaches some of the barriers of traditional media. The new communication channel is used already by millions of Internet users as their main source

Francisco Campos Freire

2008-01-01

154

Evaluaci6n de Diferentes Modelos Auxiliares en Inventarios de Recursos Naturales: Estimacion de Areas 1  

Microsoft Academic Search

Resumen-Los inventarios de recursos naturales se enfrentan a una serie de obstaculos que influyen en gran medida en la precision y por 10 tanto en la confiabilidad de los analisis de datos. El diseiio de muestreo y el analisis de los datos estan muy relacionados; por 10 que la decision sobre un diseiio de muestreo para un caso de estudio

Fabian Islas; Gerardo H. Terrazas Gonzalez; Juan Islas Gutierrez

155

UN ANÁLISIS COMPARADO DE LOS MODELOS APLICADOS PARA LA FINANCIACIÓN DE LAS UNIVERSIDADES ANDALUZAS Y VALENCIANAS  

Microsoft Academic Search

Hasta fechas relativamente recientes los mecanismos de financiación de tipo incrementalista no suponían graves tensiones a la hora de distribuir fondos entre los diferentes servicios públicos. Pero en el actual contexto de persistente déficit de las Administraciones Públicas el diseño y utilización de sistemas de financiación que intenten racionalizar la asignacion de los recursos cobra un especial protagonismo, sobre todo

José Sánchez; Campillo Dolores; Moreno Herrero

156

La perspectiva estudiantil sobre el desempeño del profesor: un modelo de regresión logística ordinal  

Microsoft Academic Search

Logistic regression is a statistical analytical technique of increasing use in health care and educational research. The purpose of this paper is to present a logistic regression model for ordinal response variables within an educational environment, in order to provide readers with guidelines from real data and a practical point of view. Based on a constructivist framework, the criterion \\

María Noel Rodríguez-Ayán

2005-01-01

157

Incidencia del modelo epistemológico de las matemáticas sobre las prácticas docentes 1  

Microsoft Academic Search

In thi s work we pretend to show up to which point the mathematical epistemologic model, implicit though dominant in scholar institution, has an influence on the docent model characteristics. That is, on the systematic and shared manner of organizing and managing of mathematics teaching process in such institution. The article sets demands for the need of a change in

Josep Gascón

158

La Educacion Continua de Profesionales de la Salud--Un Modelo para su Desarrollo  

ERIC Educational Resources Information Center

|The author suggests a framework for planning and evaluating continuing education, giving attention to the learner, his objectives, and the learning process; these components are discussed in determining the special characteristics of the continuing education of professional health workers, and a model program is presented. The article is in…

Stensland, Per G.

1974-01-01

159

Análise comparativa-financeira entre os modelos de fabricação de xarope simples  

Microsoft Academic Search

The present objective works do a comparative study between the two models of the process of making simple syrup, used in carbonated beverage factory, and identify which is the best model from the financial point of view. The economic analyze take the Net Present Value and the Internal Tax of Return as investments analyze methods, that way, these two methods

Daniel de Andrade; Gonçalves do Amaral; Everton Anger Cavalheiro

160

Particle Swarm Optimization (PSO) en modelos semi-analíticos de formación de galaxias  

NASA Astrophysics Data System (ADS)

We present preliminary results of calibrations of a semi-analytic galaxy formation model performed using the Particle Swarm Optimization (PSO) technique. This method involves the exploration of the parameter space by random walks of a set of ``particles'' that share information between them. Thus, comparing the model results against a set of observables (e.g. luminosity functions, the relation between black hole mass and bulge mass, morphological fractions), the PSO method yields a set of best-fitting values for the free parameters of the model. FULL TEXT IN SPANISH

Ruiz, A. N.; Domínguez, M. J.; Padilla, N. D.; Cora, S. A.; García Lambas, D.; Tecce, T. E.; Gargiulo, I. D.; Muñoz Arancibia, A. M.

161

Modelos autoconsistentes de sistemas estelares cuspidales y triaxiales con distribución de velocidades casi isotrópica  

NASA Astrophysics Data System (ADS)

It has been shown in many works that it is possible to build stable, self-consistent models of triaxial stellar systems, even with cusps, and containing high percentages of chaotic orbits. Since all these models have been obtained from cold collapses, their velocity distributions are strongly radial. Also, chaos was computed using either Lyapunov exponents or SALI. However, models obtained by adiabatic deformation of spherical systems, in which the velocity distribution is more isotropic, showed a very low level of chaos, though it must be noted that the method of detecting chaos used in this case, namely the variation of orbital frequencies, is less sensitive than the abovementioned methods. In this work, we present models obtained by adiabatic deformation, in which we compute the fraction of chaotic orbits using both Lyapunov exponents and variation of orbital frequencies. Our results show that the percentages of chaotic orbits is significant, though they are smaller than those obtained in models with strong radial velocity components. FULL TEXT IN SPANISH

Carpintero, D. D.; Muzzio, J. C.; Navone, H. D.; Zorzi, A. F.

162

Análisis de Componentes para un Modelo de Descripción de Unidades de Aprendizaje Heterogéneas  

Microsoft Academic Search

Educational on-line environments benefit from the use of Information and Communication Technologies to support conventional teaching\\/learning paradigms. Current technology-based learning systems can support the proceses and behaviours involved in traditional and distance teaching-learning aproaches broadly. Nevertheless, these systems are usually tailored for a specific educational methodology focused in a certain kind of suppord, and hardly provide alternative possibilities. The recent

Manuel Caeiro; Fernando Mikic; Luis Anido; Martín Llamas

163

Papel de los receptores tipo toll en las infecciones virales: el VIH-1 como modelo  

Microsoft Academic Search

The toll-like receptors are an essential component of the innate and adaptive immune response. They are responsible for the recognition of different pathogens agents and trigger responses directed at eliminating the pathogens as well as the development of immunological long-term memory. During viral infections, several different toll-like receptors are activated. These generally induce a protective immune response, but at the

Juan Carlos Hernández; Carlos Julio Montoya; Silvio Urcuqui-Inchima

2007-01-01

164

On Modelling an Immune System Sobre un Modelo Computacional del Sistema Inmune  

Microsoft Academic Search

Immune systems of live forms have been an abundant source of inspiration to contemporary computer scientists. Problem solving strategies, stemming from known immune system phenomena, have been successfully applied to challenging problems of modern computing. However, research in artificial immune systems has overlooked establishing a coherent model of known immune system behaviour. This paper aims reports on an preliminary computer

Raúl Monroy; Rosa Saab; Fernando Godínez; Eugenio Garza Sada; Nuevo León

2004-01-01

165

Funcionalismo e tradução literária: o modelo de Christiane Nord em três contos ingleses contemporâneos  

Microsoft Academic Search

Christiane Nord s functionalist model of text analysis in translation is a systematization of the ideas of the functionalists Hans J. Vermeer e Katharina Reiss, and its main function is to be applied to translation teaching as well as to translation tasks themselves. Using the premises of Functionalism as a foundation, Nord proposes a model which consists of extratextual and

Alice Leal

166

Ampliando (com todo o respeito...) o Modelo das Cinco Forças de Porter  

Microsoft Academic Search

This work approaches a very read and discussed issue - the Porter's Five Forces of Competitive Position Model (1980) - but tries to perform it in an original way, analyzing some matters not discussed by the famous author neither by the ones who have written about him. A bibliography review was developed in order to describe very shortly the Five

MARCO AURELIO; CARINO BOUZADA; JOSE GERALDO PEREIRA BARBOSA

1980-01-01

167

A INDÚSTRIA DE CALÇADOS DE COURO NO BRASIL: uma descrição a partir do modelo de Porter  

Microsoft Academic Search

This article intends to describe the leather shoes industry using Porter's five force model of competitive strategy (competition, suppliers, buyers, substitute products, barriers to entry). In addition contributed to the understanding of relationships between leather shoes industry and the competitive environment.

Sandro Alves Lima; Carlos Manoel; Fernando Martins; São Carlos

168

Matar al padre: un modelo de reconstrucción del conflicto social desde la Sociología de las Organizaciones  

Microsoft Academic Search

Killing the father: a model of social conflict reconstruction This article analizes from a sociological point of view the way members of a complex orga- nization reconstruct an internal social conflict. This process in interpreted, from a Freudian perspective, as a form of ((Killing the fathem. (Redaction)

Jesús M. de Miguel; Manuel Martín Fernández

1995-01-01

169

Propuesta Teorica de Entrevista Socratica a la Luz del Modelo de van Hiele  

Microsoft Academic Search

The goal of this paper is the description of some guides which can help in the disign of a socratic interview when the van Hiele model is applied to some concepts of mathematical analysis, whenever it is possible, in order to be sure of the detection of several reasoning lev- els, and the corresponding confection of descriptors in agrement with

Carlos Mario; Jaramillo Lopez

170

Postsplenectomy mortality in animal model Mortalidade pós-esplenectomia em modelo animal  

Microsoft Academic Search

Objecive: It is well known that splenectomy increases the risk of infections, mainly those caused by encapsulated bacteria. These complications are related to higher mortality and lower survival rates in asplenic individuals. The purpose of this study was to assess the mortality of rats submitted to total splenectomy. Methods: this is an experimental study. Thirty-four rats were divided into two

Luiz Ronaldo Alberti; Renata Figueiredo Rocha; Daniel Adonai; Machado Caldeira; Heather Hauter; Andy Petroianu

2008-01-01

171

Mortalidade pós-esplenectomia em modelo animal Postsplenectomy mortality in animal model  

Microsoft Academic Search

objecive: It is well known that splenectomy increases the risk of infections, mainly those caused by encapsulated bacteria. These complications are related to higher mortality and lower survival rates in asplenic individuals. The purpose of this study was to assess the mortality of rats submitted to total splenectomy. Methods: this is an experimental study. Thirty-four rats were divided into two

Luiz Ronaldo Alberti; Renata Figueiredo Rocha; Daniel Adonai; Machado Caldeira; Heather Hauter; Andy Petroianu

172

Micafungina en el tratamiento de la infección fúngica en modelos animales  

Microsoft Academic Search

BackgroundMicafungin is an echinocandin antifungal drug recently approved for the treatment of candidiasis. The possibility of its clinical use against other invasive mycoses, has aroused the interest of numerous investigators in evaluating its efficacy in different animal models.

Francisco Javier Pastor; Josep Guarro

2009-01-01

173

Modelos vs. dibujos: el caso de la enseñanza de las fuerzas intermoleculares  

Microsoft Academic Search

Resumen: En el presente trabajo se analizan las explicaciones verbales y gráficas confeccionadas por docentes para explicar fenómenos de solubilidad, inmiscibilidad y formación de una emulsión con mezclas de agua, alcohol y aceite. El análisis permite considerar la complejidad de los lenguajes expertos como fuente de obstáculos epistemológicos en la comunicación entre docentes y estudiantes. Finalmente, se propone un marco

Lydia Galagovsky; María Angélica Di Giacomo; Verónica Castelo

174

Capital intelectual: un modelo de mediciòn en las empresas del nuevo milenio  

Microsoft Academic Search

Resumen En el mundo globalizado en el que hoy viven las organizaciones, la dirección empresarial ha pasado de reconocer la importancia de los inversionistas, a reconocer el valor de los clientes y de aquéllos que trabajan en la organización. La empresa en sus productos o servicios vende algo más que el producto o servicio, vende un agregado representado por diversos

Juan Manuel Larios Prado

2010-01-01

175

USO DEL MODELO FRACTAL PARA CARACTERIZAR LA DISTRIBUCION DE TAMAÑO DE PARTICULAS EN SUELOS  

Microsoft Academic Search

The objective of this study was to characterize the particle-size distribution of a soil by means of fractal geometry using the accumulated mass fraction and the particle diameter. In order to fit the experimental data the accumulated mass and the particle diameter were related by a power law relation, as a result of considering the fragmentation process as fractal. The

RR FILGUEIRA; MG GARCÍA; MF ROGGIERO; A ARAGÓN; GO SARLI

176

MODELO INTEGRAL DE SATISFACCIÓN COTIDIANA EN USUA- RIOS DEPENDIENTES DE ALCOHOL Y OTRAS DROGAS  

Microsoft Academic Search

SUMMARY The objective of this study was to evaluate a conceptual model to explain alcohol and drugs abstinence in persons that meet the DSM-IV dependence criteria. This study incorporated and evaluated the conceptual proposal of the Integrated Model of Everyday Satisfaction. The structure of this model is based on the Niaura's Dynamic Regulatory Model and the Social Learning Theory that

Lydia Barragán Torres; Marlene Flores Mares; Ma. Elena Medina-Mora; Héctor Ayala Velázquez

2007-01-01

177

Desarrollo de Modelos a Escala Para Estudios Aeroelasticos (Scale Model Development for Aeroelasticity Studies).  

National Technical Information Service (NTIS)

Scale models were developed for aeroelastic research, including external stores and flutter active supression areas. The specific design of a C-101 wing model is detailed. The design is based on the application of similitude laws. The list of mass distrib...

R. Gonzalougarte

1987-01-01

178

Aplicación del Modelo de Adaptación de Callista Roy en Latinoamérica: revisión de la literatura  

Microsoft Academic Search

Literature published during the period from 1996 to 2009 was reviewed to identify progress towards applying Callista Roy's Adaptation Model in Latin America. Of the 163 documents found, 45 were selected and classified by the authors into seven categories, according to the purpose of the studies. The findings indicate the model has been applied primarily in Brazil, Mexico and Colombia.

María Elisa Moreno-Fergusson; Alejandra María Alvarado-García

2009-01-01

179

Un modelo de la teoria de colas con numero variable de canales  

Microsoft Academic Search

\\u000a Summary  In this paper the author gives the state probabilities of the following queue model.\\u000a \\u000a The arrival and departure precess are at random with ?-mean arrival and ?=mean servicing time in a single channel.\\u000a \\u000a \\u000a The number of channels is in this model a random number depending upon the length of the queue; when the number of waiting\\u000a units is M and

José Romaní

1957-01-01

180

Gramaticalização da conjunção mas: reflexões a partir do modelo de Sweetser (1991)  

Microsoft Academic Search

The model proposed by Sweetser (1991) to analyze the conjunction 'but' appears to be very efficient in the reading of the conjunction 'mas' in entries of the Medieval Portuguese. The model also provides a better comprehension concerning conceptual motivations that would have led the item into grammaticalization. This text will show that entries of 'mas', in Medieval Portuguese, fit into

Ana Paula Rocha

181

El modelo de propaganda de Noam Chomsky: medios mainstream y control del pensamiento  

Microsoft Academic Search

The objective of this work is to offer a panoramic of the model of propaganda developed by the North American linguist and political activist Noam Chomsky, with special incidence in the analysis made by Chomsky and Edward Herman in \\

Antonio Pineda Cachero

2002-01-01

182

Un nuevo modelo de cooperación deportiva y su evaluación mediante un cuestionario  

Microsoft Academic Search

A new model of sportive cooperation and its evaluation by means a questionnaire. We present in this paper the sportive cooperation as a theoretical framework for the teams' dynamics, and as an alterna- tive to others theories, specially the sportive cohesion. This theory has a double basis: 1) The rational and utilitarist decision taking upon the personal cooperation or not,

Alexandre García-Mas; Aurelio Olmedilla; Miguel Morilla; Claudia Rivas; Eva García Quinteiro; Enrique Ortega Toro

183

El modelo de crecimiento hacia adentro: una interpretación del caso colombiano  

Microsoft Academic Search

En este trabajo se realiza un análisis de los fundamentos teóricos de la CEPAL, haciendo énfasis en las ideas que sobre la industrialización diseñó la institución. Se estudia la forma en que se integran las economías latinoamericanas con el resto del mundo y la manera en que las han afectado las crisis de los años treinta y luego la de

Luis E. Vallejo Zamudio

2003-01-01

184

Autofrecuencias del movimiento del polo para un modelo de tierra de tipo Jeffreys-Molodensky.  

NASA Astrophysics Data System (ADS)

The authors present an exhaustive study of deformations and dynamical effects for theoretical polar motion of a complete Jeffreys-Molodensky earth model (ellipsodic, rotating and perturbed earth model composed by an elastic mantle with a liquid core), supposing an homogeneous core. Finally, they obtain the free frequencies of polar motion.

Camacho, A. G.; Sevilla, M. J.

185

Autofrecuencias de las ecuaciones de Helmholtz y Liouville para un modelo de tierra tipo Jeffreys simplificado.  

NASA Astrophysics Data System (ADS)

The authors obtain expressions for the free frequencies of polar motion for an ellipsoidal, rotating and perturbed earth model constituted by an elastic mantle with an homogeneous liquid core of additional simple motion.

Sevilla, M. J.; González-Camacho, A.

186

UM TERRITÓRIO A SER DEFENDIDO: CORPOS, GÊNERO E DITADURAS  

Microsoft Academic Search

Resumo: Pensar as ditaduras militares nos países do hoje denominado Cone Sul nos remete a relatos sobre manifestações, sequestros, prisões, torturas e mortes. Ao observar a atuação de mulheres e as relações de gênero que perpassam essas décadas, podemos ver seus corpos como campos simbólicos dentro da resistência, armada ou não; ambiguamente, eles representam também territórios a se defender. Partindo

Ana Maria Veiga

187

Um Olhar sobre "Beleza Americana" (A Look at "American Beauty").  

ERIC Educational Resources Information Center

|Discusses the film "American Beauty" in light of a reading of Karl Marx. Finds that the film shows the circularity which marks bourgeois society, even though the rhythm of industry and renovation of the society masks it. States that Marx praises the industry, invention, and innovation of the bourgeoisie. (BT)|

Bissoto, Maria Luisa

2000-01-01

188

Do enredo de um nome: Märchen, Maere, Maerlîn  

Microsoft Academic Search

Resumo: Entre aqueles que se dedicam a examinar a literatura fantástica e seus gêneros vizinhos, o nome de Todorov desponta, seja para refutar, seja para acatar as teses apresentadas no Introduction à la litterature fantastique. Com efeito, é preciso reconhecer o mérito da obra que soube ressaltar as leis gerais que orientam o texto literário fantástico, traçando os limites que

Sylvia Maria Trusen

189

Ocorrências éticas com profissionais de enfermagem: um estudo quantitativo  

Microsoft Academic Search

This study aimed at identifying cha- racteristics of ethical occurrences related to nursing care in a large private hospital in the city of São Paulo. There were 190 occurrences r eported t o the hospital's Nursing Ethical Committee (NEC) between 1995 and 2004. Most occurrences caused no damages to the patient, the health institution, the nursing staff or the professional

Genival Fernandes de Freitas; Taka Oguisso

2008-01-01

190

DIAGNÓSTICO ESTRATÉGICO EM UM ATELIER FAMILIAR DE MÉDIO PORTE  

Microsoft Academic Search

This article refers to a diagnostic strategy perfo rmed in the company's family Maximu Atelier in the application of the 5 forces o f Porter and perspectives within the organization, from data collected from their manage rs. It was through this diagnosis, there are factors to be considered in the strategic planning process of micro and small enterprises - MEPs,

Cláudio Antonio Rojo

191

Dança-educação: um projeto de pesquisa e extensão  

Microsoft Academic Search

Starting from the need to deepen the study about the dancing in scholar Physic Education, we developed a research and extension project, titled dancing- education. The aim was to enable the body exploration, the knowledge of the dancing manifestation diversity, so well as the argument and the though about dancing. The methodology was lined in research-action and we developed 16

Telma Cristiane Gaspari

192

Characteristics of Photonis 6-um pore microchannel plates  

NASA Astrophysics Data System (ADS)

We report on the performance of 6 micrometer pore diameter Microchannel Plates (MCPs) fabricated in 50 X 50 mm2 format, from both standard and radio-isotope free low noise glass, by Photonis SAS for a European Space Agency Technology Research Program. We compare them to MCPs manufactured by Photonis (the former Philips Photonics) for the High Resolution Camera (HRC) on NASA's Chandra X-ray observatory. The new MCPs represent a significant advance in MCP technology, having a much larger area than previously reported 6 micrometer plates, and demonstrating low noise 6 micrometer technology for the first time. The 6 micrometer plates are shown to be, mechanically, exceptionally well made with a defect density reduced by a factor of 2 - 5 compared to samples from the HRC flight blocks. They exhibit excellent gain and the expected 0.28 keV (Carbon K) X-ray quantum efficiency. The low noise plates have a very uniform response to X-rays but the standard glass MCPs do show inhomogeneity on both the global and multifiber scales.

Pearson, James F.; Brunton, Adam N.; Martin, Adrian P.; Fraser, George W.; Lees, John E.; Boutot, J.-P.; Fairbend, R.; Flyckt, Sven O.

2000-12-01

193

The First Low uM SecA Inhibitors  

PubMed Central

SecA ATPase is a critical member of the Sec family, which is important in the translocation of membrane and secreted polypeptides/proteins in bacteria. Small molecule inhibitors can be very useful research tools as well as leads for future antimicrobial agent development. Based on previous virtual screening work, we optimized the structures of two hit compounds and obtained SecA ATPase inhibitors with IC50 in the single digit micromolar range. These represent the first low micromolar synthetic inhibitors of bacterial SecA and will be very useful for mechanistic studies.

Chen, Weixuan; Huang, Ying-ju; Gundala, Sushma Reddy; Yang, Hsiuchin; Li, Minyong; Tai, Phang C.; Wang, Binghe

2010-01-01

194

Desenvolvimento de circuitos reconfiguráveis que interagem com um monitor VGA  

Microsoft Academic Search

Resumo - Este artigo descreve a implementação de circuitos reconfiguráveis que suportam interacção com monitores VGA. A visualização dos resultados e dos dados intermédios num monitor VGA facilita a depuração de circuitos realizados em FPGA e aumenta as potencialidades de interacção com o utilizador. O projecto desenvolvido foi utilizado no âmbito das disciplinas Computação Reconfigurável (4º ano de LECT) e

Iouliia Skliarova

2005-01-01

195

Process characterization of 100-um-thick photoresist films  

NASA Astrophysics Data System (ADS)

The number of lithographic applications that require the use of photoresist thickness of one hundred microns or more is rapidly increasing. Extremely large structure heights and high aspect ratios are often required for micro- electrodeposition of mechanical components such as coils, cantilevers and valves. These ultra-thick photoresist can also be used as a mold in micro-electromechanical systems. Ultra-thick photoresist are also used in bump bond applications to define the size and location of the bonds for advanced flipchip packaging.

Flack, Warren W.; White, Sylvia; Todd, Bradley

1999-05-01

196

Photoresist technology for 0.25-um lithography  

NASA Astrophysics Data System (ADS)

It has been the general opinion of device manufacturers that deep ultraviolet (DUV) imaging will be the imaging method required to produce 250nm and sub-250nm geometries for 256Mb-DRAMs and related logic technology. Traditional I-line lithography may not be capable of manufacturing at these geometry's and the use of DUV radiation with 'chemically amplified' photoresists will be required for these device programs. Issues regarding the problems that researchers are combining or have not yet considered in the evolutionary chain of DUV photoresist development and implementation will be discussed. As researchers continue developing environmentally stable materials, there is a series of issues that device manufacturers need to resolve today as new quarter micron fabs are currently under construction. Fab designers may need to consider additional space for specialty tools or processes in order to produce quarter micron lithography. The issues concerning materials, process, reflectivity control, manufacturing facilities, quality control, photoresist manufacturing, photoresist cost and a proposed roadmap for the next several years of development will be discussed. The author will also provide a brief overview of current I-line photoresists and their capability to the 300nm geometry region along with some basic chemistry regarding the principles of DNQ's and chemically amplified photoresists.

Conley, Willard E.

1996-07-01

197

Mídia, violência e alteridade: um estudo de caso  

Microsoft Academic Search

Media, violence and otherness: a case study. The objective of this paper is to discuss some representations that circulated on press media about the bus kidnapping case that occurred in the city of Rio de Janeiro, in June 2000. The kidnapping was aired live on TV with a big mass media coverage, and it had a tragic end. Our analysis

Fabiana Pinheiro Ramos; Helerina Aparecida Novo

2003-01-01

198

Toward 1-TW train of 10-um picosecond laser pulses  

NASA Astrophysics Data System (ADS)

The results of principal upgrade of high-pressure, X-ray preionized TE-CO2 laser towards obtaining 10 atm volume self-sustained discharge in CO2:N2:He mixtures with reasonably high (up to 25%) percentage of molecular gases are reported. The estimated energy of radiation from such a laser is greater than or equal to 15 J. It corresponds to peak power of regeneratively amplified 2 ps 10 micrometer pulse formed in master oscillator of laser system greater than or equal to 1.5 TW.

Apollonov, Victor V.; Kazakov, K. K.; Pletnyev, N. V.; Sorochenko, Vladimir R.

2000-04-01

199

Laser pattern-generation technology below 0.25 um  

Microsoft Academic Search

The projected rapid reduction in mask minimum feature size from the 250 nm to the 100 nm wafer generation will drive laser pattern generators to deep UV wavelengths. Commercially available sources exist in the 250 nm wavelength region using nonlinear optical materials to frequency double longer wavelength laser lines. Nonlinear optical materials, such as SBBO and KBBF, exist for wavelengths

Paul C. Allen

1998-01-01

200

Laser pattern-generation technology below 0.25 um  

NASA Astrophysics Data System (ADS)

The projected rapid reduction in mask minimum feature size from the 250 nm to the 100 nm wafer generation will drive laser pattern generators to deep UV wavelengths. Commercially available sources exist in the 250 nm wavelength region using nonlinear optical materials to frequency double longer wavelength laser lines. Nonlinear optical materials, such as SBBO and KBBF, exist for wavelengths below 200 nm but they have not been commercialized. Second harmonic generation in intracavity or mode-locked, external resonant-ring laser configurations can be used to produce sub-200 nm radiation. Existing system architectures are shown to be easily modified to use pulsed sources with a high repetition rate. Advances in nonlinear optical materials, laser design, and system architecture will ensure that laser pattern generation will be an effective maskmaking technology for the next decade.

Allen, Paul C.

1998-06-01

201

Um Estudo Exploratório sobre Inteligência Competitiva no Brasil AUTOR  

Microsoft Academic Search

This is an exploratory study and its main objective was to analyse the daily work from Competitive Intelligence Professionals, as analysts and managers in Brasil. It was developed under a sample based on 79 companies among 500 companies from Maiores and Melhores Guide 2007, with a structured questionnaire and interviews. The main results indicated that companies follow the competitors every

ALFREDO PASSOS DA SILVA

202

UM-StL 1D Acceleration Solver  

NSDL National Science Digital Library

Produced by the University of Missouri - St. Louis, this website is an educational "resource for solving low and high speed constant acceleration problems." Physics students can find quantitative tools to handle time dilation, relativist acceleration, and curved space-time. Containing networks of numerous concepts dealing with physics, chemistry, and math, the site helps students understand how various concepts fit together. Within this large site, students can find information about SpaceTime theory, Map-based relativity, Lorentz Transforms, and much more.

203

Process characterization of 100-um-thick photoresist films  

Microsoft Academic Search

The number of lithographic applications that require the use of photoresist thickness of one hundred microns or more is rapidly increasing. Extremely large structure heights and high aspect ratios are often required for micro- electrodeposition of mechanical components such as coils, cantilevers and valves. These ultra-thick photoresist can also be used as a mold in micro-electromechanical systems. Ultra-thick photoresist are

Warren W. Flack; Sylvia White; Bradley Todd

1999-01-01

204

Der Ausbruch des Thera-Vulkans um 1500 v. Chr  

Microsoft Academic Search

The stylistic development of the painted pottery from the excavations of Akrotiri on Thera evidences that the great Late-Minoan eruption of the Thera volcano must be dated around 1500 B.C. The eruption had only minor effects on Crete which were not nearly so serious as has been supposed. The rate of ash fall and the height of the tsunamis did

H. Pichler; W. Schiering

1978-01-01

205

2.7-um diode-pumped fiber laser  

NASA Astrophysics Data System (ADS)

The performances of the diode-pumped 2.7 micrometers fiber laser have been studied. From the population inversion estimated for a fluorozircoaluminate (AZF) glass with different ErF3 doping, a higher gain was expected for a higher ErF3 doping. The laser performances were improved by adjusting fiber length. Maximum output power of 18.5 mW and slope efficiency of 7% were obtained by using 10 mol% ErF3 doped, 25 mm long AZF fiber in the 800 nm pumping. A cw lasing was achieved by diode pumping at 0.98 micrometers and the effect of Yb3+ sensitization was discussed to improve the performance.

Yanagita, Hiroaki; Toratani, Hisayoshi; Yamashita, Toshiharu T.; Masuda, Isao

1992-02-01

206

O ANTIGO EGITO EM ESPAÇOS PRIVADOS: UM ESTUDO DE EGIPTOMANIA  

Microsoft Academic Search

The manifestations of the Egyptomania are easily recognized in public environments because symbols and architectural elements can be seen in squares, fronts and cemeteries of different cities. There are difficulties in the studies of the Egyptomania in private spaces, specially the interns, due to the main localization of them. However, when these spaces are found, they can disclose and surprise

Liliane Cristina Coelho

207

Regulações Institucionais e Integração Cultural: um Binômio Viável  

Microsoft Academic Search

This article proposes to explore and emphasize some aspects of the authors doctorate thesis. It presents some forms, and organizational principles of the Alcoholics Anonymous or (AA) in Brazil and Uruguai, as well as analyses relationship between the groups institutional regulations and the institutions potential for cultural integration. Thus, this institution can be concieved to be, for the aim of

Eliane Ganev

2002-01-01

208

Um Ambiente para Transmissão de Vídeos Instrucionais sob Demanda  

Microsoft Academic Search

This paper presents an environment for transmition of instructional videos to support students learning at UNIVALI undergraduate couses. It emphatises the vídeo on demand server development wich allows media streams to be delivered. The server was developed with Java Media Framework API and is prepared to respond to many cliente simultaneously. The media files are retrived from the media server,

Rafael Canan; André Luís; Alice Raabe

209

Habilidades sociais em mulheres obesas: um estudo exploratório1  

Microsoft Academic Search

Among the psychological aspects concerning obesity, the quality of the interpersonal relationships can be pointed out. The assumption is that the overweighted people, given their restrictions, may have deficits in social skills. This research aimed to verify, in a sample of 29 morbid obese women, their main deficits in general social skills and in those ones related to feeding; the

Sabrina Kerr; Bullamah Correia; Zilda Aparecida; Pereira Del Prette; Almir Del Prette

210

Habilidades sociais conjugais e filiação religiosa: um estudo descritivo  

Microsoft Academic Search

The development and maintenance of social skills are influenced by many factors, including faiths and norms. Since, as a rule, religious faith regulates social behavior which includes relationships between spouses, the influence of religious affiliation on social skills is evaluated. Seventy-four couples (Catholic, Presbyterians and no religious affiliation) completed the Marital Social Skills Inventory (MSSI) and a personal data form.

Miriam Bratfisch Villa; Zilda Aparecida Pereira Del Prette; Almir Del Prette

2007-01-01

211

Optical gain and loss in 3-um diode W lasers  

NASA Astrophysics Data System (ADS)

Gain in broad area mid-infrared diode W lasers ((lambda) =3- 3.1micrometers ) has been measured using lateral mode spatial filtering combined with the Hakki-Paoli approach. The internal optical loss of approximately equals 19cm-1 determined from the gain spectra was the same for devices with either 10- or 5-period active regions and nearly constant in the temperature range between 80 and 160K. Analysis of the differential gain and spontaneous emission spectra shows that the main contribution to the temperature dependence of the threshold current is Auger recombination, which dominates within almost the entire temperature range studied (80-160K).

Suchalkin, Sergei; Westerfeld, David; Donetski, Dimitrii; Martinelli, Ramon U.; Vurgaftman, Igor; Meyer, Jerry R.; Luryi, Serge; Belenky, Gregory L.

2002-05-01

212

Manufacturing optimization strategies for 0.35-um design rules  

Microsoft Academic Search

Not Available Bibtex entry for this abstract Preferred format for this abstract (see Preferences) Find Similar Abstracts: Use: Authors Title Return: Query Results Return items starting with number Query Form Database: Astronomy Physics arXiv e-prints

Jacek K. Tyminski; Sean J. McNamara; Toshihiro Sasaya; Masaya Komatsu; Dean C. Humphrey; Arthur Winslow

1997-01-01

213

Histórias infantis: um recurso para a compreensão dos estados mentais  

Microsoft Academic Search

Children's storybooks: a resource to the understanding of mental states. This study examined a sample of 100 national children's storybooks directed to pre-school children aged four to six years to identify words\\/ utterances that denote mental states according to three views of analysis: via words and expressions in the text; via the pictures; and via presence of irony or false

Marisa Cosenza Rodrigues; Jacqueline Silva Rubac

2008-01-01

214

O perfil de clientes de um shopping center: um estudo exploratório com consumidores do interior  

Microsoft Academic Search

The study was carried out in a Minas Gerais' inland city, so as to get acquainted with the profile and habits of its clients. This research is innovative as it approaches as customer the citizen of an inland town. The objective of this work was to identify the groups of customers taking into consideration their level of satisfaction as well

Daniela Meirelles Andrade; Josmaria Lima Ribeiro de Oliveira; Luiz Marcelo Antonialli

2004-01-01

215

UM PROCEDIMENTO PARA SELEÇÃO DE ESTRATÉGIAS DE PRODUÇÃO E INJEÇÃO DE UM CAMPO EM DESENVOLVIMENTO, LEVANDO EM CONSIDERAÇÃO INCERTEZAS GEOLÓGICAS  

Microsoft Academic Search

The optimization of the hydrocarbon's explotation in a field development project may be very complex, due to the uncertainties on the reservoir characterization. Different strategies may present great variations on fluid production (oil, water and gas) and on the costs and profits related to the explotation. A procedure to select strategies must consider the possibilities, compare them and choose the

Cristina C. Mezzomo; Álvaro F. Martini; Denis J. Schiozer

216

 

PubMed

O método Grade of Membership (GoM) tem sido cada vez mais utilizado por demógrafos brasileiros e tem a vantagem de possuir um parâmetro que mensura a heterogeneidade individual, com base nas correlações não-observáveis entre as categorias de resposta das variáveis de interesse, gerando um medida do grau de pertencimento de cada indivíduo a perfis extremos. Alguns autores, contudo, chamam atenção para questões importantes na calibragem dos modelos finais que utilizam o programa GoM versão 3.4, como o problema de identificabilidade - soluções múltiplas para parâmetros estimados. Neste artigo, é sugerido um procedimento capaz de identificar um modelo final com solução única que descreva os tipos puros mais fidedignos à base de dados, em uma tentativa de otimização. Para ilustrar esse processo, utilizou-se uma base de dados correspondente a um levantamento econômico e sociodemográfico de uma população de pequenos agricultores residentes ao longo da Rodovia Transamazônica, no Estado do Pará. Também identificou-se a existência de instabilidade nos parâmetros estimados pelo programa GoM 3.4, sendo proposto um método de estabilização de seus valores. Com esses procedimentos combinados, os usuários do programa GoM 3.4 poderão descrever sua base de dados de forma mais adequada e responder às críticas sobre questões de identificabilidade e estabilidade dos modelos resultantes. Essas soluções empíricas são relevantes por afetarem cálculos de prevalência e de incidência de eventos de interesse, além de trazerem consequências importantes sobre o ponto e o momento corretos para intervenções de políticas públicas ou de planejamento prospectivo em análises de projeção. PMID:21709732

Guedes, Gilvan Ramalho; Caetano, André Junqueira; Machado, Carla Jorge; Brondízio, Eduardo Sonewend

2010-01-01

217

Estudo de soluções locais e cosmológicas em teorias do tipo tensor-escalar  

Microsoft Academic Search

Teorias do tipo tensor-escalar são a mais simples extensão possí vel da Relatividade Geral. Nessas teorias, cujo modelo padrão é a teoria de Brans-Dicke, a curvatura do espaço-tempo, descrita por componentes tensoriais, aparece acoplada a um campo escalar que, de certo modo, representa uma variação na constante de acoplamento da gravitação. Tais teorias apresentam soluções locais e cosmológicas que, em

S. Silva E Costa

2003-01-01

218

MATHEMATICAL MODEL FOR PREDICTION OF MOISTURE CONTENT IN JALAPEÑO PEPPER (Capsicum frutescens) MODELO MATEMÁTICO PARA LA PREDICCIÓN DEL CONTENIDO DE HUMEDAD EN CHILE JALAPEÑO (Capsicum frutescens) MODELO MATEMÁTICO PARA A PREDICCIÓN DO CONTIDO DE HUMIDADE EN CHILE JALAPEÑO (Capsicum frutescens)  

Microsoft Academic Search

A model to predict the moisture content in jalapeño peppers (Capsicum frutescens) has been presented. The product was dried under five drying temperatures (50, 60, 70, 80 and 95°C), and these experiments provided data for model formulation. Analysis of the simulated results have indicated that there are two possible mechanisms for jalapeño peppers drying, both of which are a function

L. A. Ochoa-Martínez; J. A. Gallegos-Infante; J Morales-Castro; H. Medrano-Roldán; N. E. Rocha-Guzmán

2004-01-01

219

Entrada de Dados, Estrutura e Modelos para o Simulador CINNAMON (User Interface, Structure and Models for the Simulator CINNAMON).  

National Technical Information Service (NTIS)

The report describes work done in the development of a new electrical level simulator for MOS circuits, whose main innovation is the introduction of a new electrical level simulation method concept: the event-driven simulation. The circuit description for...

J. M. M. Guimaraes

1988-01-01

220

Un modelo simple para describir la dinámica de la biomasa del camarón nailon Heterocarpus reedi en Coquimbo, Chile  

Microsoft Academic Search

A daily record of space\\/time dynamics was carried out on CPUE (ton·trawl -1 ) for the nylon shrimp trawl fishery based at Coquimbo, Chile, between September 1997 and August 2000. A modified biomass depletion model was constructed to analyze the temporal variations in CPUE based on the concepts of abundance (total population biomass) and availability (potential biomass capture). Both quantities

Eduardo P. Pérez

2005-01-01

221

MODELO HIDROLÓGICO SUPERFICIAL Y SUBTERRÁNEO DESARROLLADO PARA LA SIMULACIÓN DE SISTEMAS DE LLANURA. 2. ESTRATEGIAS PARA LA CALIBRACIÓN  

Microsoft Academic Search

The hydrological model SHALL3 was conceived with physically-based parameters, nevertheless, those that presented uncertainties or heterogeneities were fitted. The model was applied in the Ludueña's basin (Santa Fe, Argentina). Data of precipitation, evaporation, flows, limnigraphs and water-table are available. As calibration parameters was taken (a) two coefficients for the vertical hydraulic conductivity adjustments, (b) the critical suction and the pores

Erik Daniel Zimmermann

222

Diseno y verificacion del modelo de bulto 'GURI 01'. (Design and verification of the 'GURI 01' bundle model).  

National Technical Information Service (NTIS)

This work presents a general description of the 'GURI 01' bundle model, designed by INVAP S.E., under international radioactive material transportation regulations, as a B(U) type bundle for international transportation up to a maximum of 350000 Ci of Co6...

G. D. Benito

1990-01-01

223

IMPLEMENTAÇÃO DO MODELO NUMÉRICO DA UNIVERSIDADE DE PRINCETON NO ESTUDO DA CIRCULAÇÃO OCEÂNICA AO LONGO DA COSTA PERUANA  

Microsoft Academic Search

The objective was to realize the tuning of the Princeton Ocean Model (POM) along the Peruvian coast at 5°N and 45°S. The model was developed by finite difference schemes of gridded type (called Arakawa-C staggered grid) and we studied the oceanic circulation relative to the period of interest 1991-2001. The methodology of the tuning the model was: (1) to generate

E. Aguirre; E. Campos

224

Evolución de los modelos numéricos de flujo de agua subterránea en el acuífero de Ogallala en Texas  

Microsoft Academic Search

The Ogallala aquifer is the main source of water for much of the central United States. In Texas, for example, more water is pumped from this aquifer with more than 70,000 irrigation wells than from any other aquifer. Water levels in much of the aquifer in Texas declined an average of more than 0.6 m\\/yr during 1950-2000. Few regional aquifers

Alan R. Dutton; Robert E. Mace

225

El concepto de selección interna y la sujeción de la Biología Evolucionaria del Desarrollo al modelo de explicación variacional  

Microsoft Academic Search

The concept of internal selection and the subjection of Evolutionary Developmental Biology to the variational model of explanation. The idea of internal selection, originally proposed by Lancelot Whyte, not only helps us to understand the causal status of developmental constraints, but can also show us how these organismic or internal factors, whose relevancy Evolutionary Developmental Biology highlights today, can be

Gustavo Caponi

226

Determinación del calibre vascular retiniano en hipertensos con un método semiautomático basado en el modelo de snakes  

Microsoft Academic Search

Background and objectiveEarly alterations in retinal microcirculation are observed in most hypertensive patients seen in daily practice and the European guidelines consider it is necessary an objective method to quantify these alterations. We have previously described a semi-automatic computerized system to evaluate the calibre of retinal blood vessels that has shown high sensitivity and specificity to calculate the arteriovenous ratio

Antonio Pose-Reino; Marta Pena Seijo; Manuel González Penedo; Marcos Ortega Hortas; María Rodríguez Blanco; Pilar Vega; José Luis Díaz Díaz; Noa Fernández; Juan Carlos Estévez; Francisco Gómez-Ulla Irazábal

2010-01-01

227

El modelo de ayudas directas en la PAC post-2013: análisis de impactos de escenarios potenciales  

Microsoft Academic Search

Following their introduction in 1992, direct payments have become one of the main instruments of the Common Agricultural Policy. The aim of this study is to analyse potential scenarios of harmonization of direct payments in the CAP post-2013. In doing so, we use the CAPRI model, which represents the functioning of agricultural markets at the global level and simultaneously models

Maria Blanco; Sol Garcia-German; Isabel Bardaji

2011-01-01

228

ANALISIS DE REFERENCIAS BASADO EN UN MODELO DE ESPACIOS VECTORIALES: LA INVESTIGACION EN HISTORIA CONTEMPORANEA EN JAEN DURANTE 1990 ?1995  

Microsoft Academic Search

Abstract. The spatial perfomance of the relationships among researchers in Contemporany History of Jaén for 1990-1995 through their behaviour in citing process is the objetive of this work. Through reference a nalysis bases on a Vector Space Model (VSM) and displayed in a graphic thanks to Multidimensional Scaling (MDS) are obtained results about research fronts, who lead them, who made

José Luis Ortega Priego

229

UN MARCO TEÓRICO Y PEDAGÓGICO PARA LA UTILIZACIÓN DE MODELOS ANALÓGICOS EN LA E NSEÑANZA DE LAS CIE NCIAS NATURALES  

Microsoft Academic Search

In this research, we put forward the theoretical basis and didactic strategies that have been used: Research into Didactic Physics. The research results have been presented by means of a group of studies carried out in the last years concerning the use of the modelling in teaching Physics (1) . Research into the models of functional reasoning: conceptual models. Such

Lucrecia Ethel

230

EVALUACIÓN DE LOS MODELOS NUMÉRICOS DE FLUJO DE AGUA EN EL SUELO HYDRUS-2D Y SIMDAS EN RIEGO LOCALIZADO  

Microsoft Academic Search

RESUMEN. En un sistema de riego localizado resulta muy importante conocer la distribución de agua en el suelo para evitar pérdidas por percolación y conseguir un nivel de producción óptimo. Para ello, en la fase inicial de diseño agronómico deben realizarse pruebas de campo previas, consistentes en aplicar un volumen de agua acorde a las necesidades del cultivo con un

G. Arbat; J. Puig; F. Ramírez de Cartagena

2003-01-01

231

La guía paterna en el consumo televisivo: un modelo cuantitativo y cualitativo en el aprendizaje de contenidos  

Microsoft Academic Search

Parents' behavioural patterns as regards TV use are defining of the child's interaction with the medium. To all appearances, parents' supervision helps the child establish a set of personal criteria concerning both duration and frequency of exposure, as well as age appropriateness. Furthermore, as our research evinces, children in the habit of discussing TV shows with their parents reveal a

Carmen Marta Lazo

2006-01-01

232

Modelos para la Unificacion de Conceptos, Metodos y Procedimientos Administrativos (Guidelines for Uniform Administrative Concepts, Methods, and Procedures).  

ERIC Educational Resources Information Center

|These documents, discussed and approved during the first meeting of the university administrators affiliated with the Federation of Private Universities of Central America and Panama (FUPAC), seek to establish uniform administrative concepts, methods, and procedures, particularly with respect to budgetary matters. The documents define relevant…

Serrano, Jorge A., Ed.

233

APLICACIÓN DE MODELOS DE DISTRIBUCIÓN DE ESPECIES A LA CONSERVACIÓN DE LA BIODIVERSIDAD EN EL SURESTE DE LA PENÍNSULA IBÉRICA  

Microsoft Academic Search

Applying only-presence based species distribution models, we develop a modelling framework using multiple algorithms, evaluating and selecting the most accurate models using ROC curves and several random samples. We generate models of suitable habitat for the threatened plant species Linaria nigricans and potential distribution models for greenhouses. Combining the resulting models we built up a relative extinction risk model, useful

BLAS BENITO DE PANDO; JULIO PEÑAS DE GILES

2007-01-01

234

EFETIVIDADE NO ENSINO SUPERIOR BRASILEIRO: APLICAÇÃO DE MODELOS MULTINÍVEL À ANÁLISE DOS RESULTADOS DO EXAME NACIONAL DE CURSOS  

Microsoft Academic Search

This study analyses the impact of institutional characteristics on the students' performance in the National Examination of Higher Education Courses (Provão). A sample of more than 92500 students from Management, Law and Civil Engineering who had made the tests in the year 2000 was analyzed. Multilevel models have been fitted because these data present an evident hierarchical structure. Regarding individual

Maria Dolores Montoya Diaz

2005-01-01

235

Precio del agua y relocalización del recurso en la economía andaluza. Una aproximación desde un modelo de equilibrio general aplicado  

Microsoft Academic Search

El objetivo de este trabajo consiste en analizar los efectos que tendría un incremento en la tarifa del agua del sector agrario sobre la conservación del recurso, la eficiencia en el consumo y la posible relocalización del mismo entre los diferentes sectores productivos. La política tarifaria se aplicará sobre el sector agrario debido, por un lado, al excesivo consumo de

M. Alejandro Cardenete; G. J. D. Hewings; E. Velázquez

2005-01-01

236

UTILIZACIÓN DEL MODELO DE EDEMA AURICULAR INDUCIDO POR TPA EN LA EVALUACIÓN FARMACOLÓGICA DE LOS CÁLICES DE PHYSALIS PERUVIANA L  

Microsoft Academic Search

The anti-inflammatory activity of dry-calices from Physalis peruviana is common in folk medicine. Using the ear oedema murine model induced by TPA this was confirmed, and was find that this activity is dose-dependent. By solvent partitions and preparative chromatographic techniques, 38 fractions was isolated, encountered that the Pp-D38-LF one is the more abundant and active against inflammation.

LUIS A. FRANCO; LUIS F. OSPINA; GERMAN E. MATIZ; RICARDO GAITAN

2007-01-01

237

Cómo medir la quiebra de las empresas en Santander, el modelo logístico: una herramienta para evaluar el riesgo de quiebra  

Microsoft Academic Search

Las propuestas contenidas en el documento del Nuevo Acuerdo de Capital de Basilea, para medir el riesgo de crédito, sirven de base para medir también el riesgo de quiebra de las empresas con base en la utilización de ratios financieros internos. En la práctica se presentan situaciones en la que es necesario tomar decisiones de acuerdo con el comportamiento de

José Joaquín Alzate Marín

2008-01-01

238

ANÁLISIS ECONÓMICO DE LA ELECCIÓN DE CARRERA UNIVERSITARIA. UN MODELO LOGIT BINOMIAL DE DEMANDA PRIVADA DE EDUCACIÓN  

Microsoft Academic Search

This paper analyzes, using a binomial logit model, the factors that determine a students decision on a three or four year University career. The microeconomic model we consider includes the most important aspects of educational choices. The results show how social background, family earnings and scholastic ability affect a youth¿s educational choice in practice. Este artículo presenta un análisis microeconómico

Manuel Salas Velasco; Juan de Dios Jiménez

1999-01-01

239

Resection of parenchymatous organs using pulse YAG:Nd laser radiation at 1.44-um and 1.32-um wavelengths  

NASA Astrophysics Data System (ADS)

We have demonstrated that when using in surgical operations the radiation of YAG:Nd laser with 1.44 micrometers wavelength exhibits better cutting capabilities as compared to the same laser at 1.32 micrometers wavelength. The laser scalpel at 1.44 micrometers also provides adequate hemostasis at non-typical section of parenchymals without blood vessel ligation, however this capability is higher for 1.32 micrometers radiation. It is possible to combine the advantages of both radiations by repetitive switching the laser between two wavelengths or mixing two simultaneously generate wave in one optical waveguide. Application of several YAG:Nd laser wavelengths with different absorption coefficients in a single operation on the soft tissue allows one to coagulate large-scale blood vessels and to minimize thermal damages of surrounding tissue.

Zubeev, Pavel S.; Rotkov, A.; Vaganov, I.; Skvortsova, I.; Kamensky, Vladislav A.; Gelikonov, Grigory V.; Sergeev, Alexander M.

1999-06-01

240

Laser-tissue interaction of a continuous-wave 2-um, 3-um cascade oscillation fiber laser: sharp incision with controlled coagulation layer thickness  

NASA Astrophysics Data System (ADS)

We studied coagulation layer controlled incision with newly developed continuous wave 2 micrometer, 3 micrometer cascade oscillation fiber laser in vitro. Since this laser device simultaneously oscillates 2 micrometer and 3 micrometer radiation, we could change tissue interaction by arranging power ratio of 2 micrometer to 3 micrometer radiation. About one watt of total irradiation power with various power ratios was focused to extracted fresh porcine myocardium or anesthetized rabbit on an automatic moving stage to obtain line incision. Macro photograph and microscopic histology were used to observe tissue interaction phenomenon. The incised specimen showed that precise cutting groove with thin coagulation layer was attained by a 3 micrometer based radiation, meanwhile addition of 2 micrometer radiation to 3 micrometer radiation made coagulation layer thicker. A heat conduction simulator using finite-element method was used to qualitatively explain obtained coagulation layer thickness. This precise incision with controllable side coagulation layer may effective to control bleeding during incision, for instance, for skin, liver, and kidney incisions. Pure continuous wave radiation of 2 micrometer and 3 micrometer may eliminate stress wave induced tissue damage which is frequently found in Ho:YAG and/or Er:YAG tissue interactions. Moreover, sapphire fiber might offer flexible power delivery to this new laser to establish endoscopic application and/or to improved beam handling.

Arai, Tsunenori; Sumiyoshi, Tetsumi; Naruse, Kyota; Ishihara, Miya; Sato, Shunichi; Kikuchi, Makoto; Kasamatsu, Tadashi; Sekita, Hitoshi; Obara, Minoru

2000-06-01

241

Recognition of favorable zones for uranium and thorium accumulation, at Um Ara-Um Shilman granitic pluton, South Eastern Desert, Egypt, using airborne spectrometric and magnetic data  

NASA Astrophysics Data System (ADS)

The objective is aimed at identifying significant U and Th anomalies, the amount of re-mobilization of U and Th, the structural framework of the granite pluton and the distribution of spectrometric anomalies. The study revealed that the granite pluton could be represented as a single radio-lithologic unit excluding abnormal measurements exceeding X¯ + 2S. It also revealed the existence of eight strong spectrometric anomalies. Observed values of eU correlate well with eTh, r = 0.72, while the correlation between eU/eTh and eU is lacking, r = 0.190. Meanwhile, there is a negative correlation between eU/eTh and eTh, r = -0.335. This deficiency in correlation suggests a limited or zero remobilization of uranium, which was partly governed by magmatic processes. An interpretative basement structural map of the study-area showed some striking features: four NW-trending faults of first-order magnitude (probably shear zones); three NE-trending faults of second-order magnitude; a series of third-order magnitude faults trending in different directions and, questionably, strike-slip faults as well as some basic and acidic dykes. Most of the radioactive anomalies were found within or near the major contact faults which may act as channels for mineralized fluids from the subsurface. These fluids possess increased concentrations of U and/or Th which could exist in appropriate chemical and/or structural traps. The U and Th anomalies were found to be associated with the northern and southern parts of the granite pluton respectively. The difference between the northern and southern parts of the granite pluton may be attributed to differences in radioelement content, the effect of partial and/or complete digestion of older rocks, or to different levels of erosion.

Elkattan, Elsayed M.

1995-06-01

242

Mild steels coated with 14% manganese covered electrodes (E7-UM-200-K and E1-UM-350): Phenomena at the steel-coating interface  

SciTech Connect

In this work the authors have studied the phenomena in the interface of the coating made on soft carbon steel with electrodes with a high content of manganese. The study has been done with scanning electron microscope and X-rays mapping images. These images show how the alloy elements are distributed in each of the constituent elements presented in the interface, and the nature of these constituents. These results have allowed us to verify that many of the problems that arise in homogeneous joints, as such localised corrosion, low interface resistance, etc., happened, precisely in these regions. As a help to determine the nature of the constituent elements, microhardness measurements have also been made.

Molleda, F. [Escuela Tecnica Superior de Ingenieros Navales de Madrid (UPM) (Spain)]. E-mail: fmolleda@etsin.upm.es; Mora, J. [Escuela Tecnica Superior de Ingenieros Navales de Madrid (UPM) (Spain); Molleda, F.J. [ESAB Iberica (Spain); Carrillo, E. [Escuela Tecnica Superior de Ingenieros Navales de Madrid (UPM) (Spain); Mora, E. [Escuela Tecnica Superior de Ingenieros Navales de Madrid (UPM) (Spain); Mellor, B.G. [University of Southampton (United Kingdom)

2006-12-15

243

Definição de um Ambiente para apoiar a Gerência de Conhecimento para Projeto de Banco de Dados utilizando um Framework Conceitual e Padrões de Análise  

Microsoft Academic Search

Resumo Uma das grandes dificuldades no desenvolvimento de software é que, muitas vezes, os desenvolvedores não estão familiarizados com o domínio para o qual o software está sendo desenvolvido. A necessidade de apoiar o desenvolvimento de software em domínio específicos tem sido endereçada tanto por Ambientes de Desenvolvimento de Software Orientados a Domínio (ADSODs), como pelo uso de gerência do

Viviane C. Dias; Carlos A. M. Pietrobon; Mário Fabiano Alves

244

CÂNCER: UM ESTUDO DAS CAUSAS E CONSEQÜÊNCIAS SOBRE UM GRUPO DE PACIENTES CANCER: A STUDY OF THE CAUSES AND CONSEQUENCES OF A GROUP OF PATIENTS  

Microsoft Academic Search

PALAVRAS-CHAVES: Câncer, Dificuldades, Estratégias de Enfrentamento. ABSTRACT: The Hospital Psychology has contribbuted to the humanization of hospitals and their practices as it promotes the maintenance of health, prevention and treatment of diseases together with health teams, patients and families. The present study aimed at identifying the causes of câncer and its consequences in a group of patients and their families.

Carmen Garcia de Almeida; Renata Garcia de Almeida Moraes; Garcia de Almeida Moraes

245

Comparing the use of 4.6 um lasers versus 10.6 um lasers for mitigating damage site growth on fused silica surfaces  

SciTech Connect

The advantage of using mid-infrared (IR) 4.6 {micro}m lasers, versus far-infrared 10.6 {micro}m lasers, for mitigating damage growth on fused silica is investigated. In contrast to fused silica's high absorption at 10.6 {micro}m, silica absorption at 4.6 {micro}m is two orders of magnitude less. The much reduced absorption at 4.6 {micro}m enables deep heat penetration into fused silica when it is heated using the mid-IR laser, which in turn leads to more effective mitigation of damage sites with deep cracks. The advantage of using mid-IR versus far-IR laser for damage growth mitigation under non-evaporative condition is quantified by defining a figure of merit (FOM) that relates the crack healing depth to laser power required. Based on our FOM, we show that for damage cracks up to at least 500 {micro}m in depth, mitigation using a 4.6 {micro}m mid-IR laser is more efficient than mitigation using a 10.6 {micro}m far-IR laser.

Yang, S T; Matthews, M J; Elhadj, S; Cooke, D; Guss, G M; Draggoo, V G; Wegner, P J

2010-10-21

246

A fonte ionizante do disco de acreção no núcleo de NGC1097  

NASA Astrophysics Data System (ADS)

Observações em raios-X revelam o "coração" dos núcleos ativos de galáxias, pois esse tipo de radiação provém das suas regiões mais internas, próximas ao buraco negro central. Neste trabalho apresentamos observações em raios-X da região central da galáxia NGC1097, que hospeda um buraco negro supermassivo e um disco de acreção cuja emissão vem sendo observada há dez anos através da linha de emissão Ha larga (10000 km/s) e de duplo pico. As observações em raios-X - que foram obtidas com o Telescópio Chandra - foram combinadas com observações no ultravioleta obtidas com o Telescópio Espacial Hubble e são usadas para estudar as características da fonte central que ioniza o disco de acreção. A distribuição espectral de energia é comparada com a predita por modelos, em particular o de uma estrutura "ADAF" ("advection dominated accretion flow") na parte interna do disco. Tal estrutura produz um espectro de emissão de linhas estreitas tipo LINER, como observado em NGC1097 e em rádio-galáxias que apresentam linhas de Balmer largas de duplo pico. Apresentamos também uma comparação entre outros LINERs com linhas de emissão largas de duplo pico, disponíveis na literatura ou nos arquivos do Chandra e do Telescópio Espacial Hubble e discutimos as correspondentes implicações para modelos da fonte central.

Silva, R. N.; Storchi-Bergmann, T.

2003-08-01

247

A distribuição de velocidades na linha de visada em galáxias barradas vistas de face  

NASA Astrophysics Data System (ADS)

Com o objetivo de realizar um estudo cinemático da componente vertical de barras em galáxias, obtivemos espectros de fenda longa de alta razão S/N ao longo dos eixos maior e menor de 14 galáxias barradas vistas de face, nos telescópios de 1.52m do ESO em La Silla, Chile, e de 2.3m do Steward Observatory em Kitt Peak, Arizona. Estes dados nos permitiram determinar a distribuição de velocidades das estrelas ao longo do eixo vertical das barras e discos destes sistemas, tanto no centro como em pontos que distam cerca de 5 e 20 segundos de arco do núcleo, correspondendo a distâncias de cerca de 0.7 e 2.8 kpc, respectivamente. Desta forma, a variação radial da distribuição de velocidades também pôde ser avaliada. Este tipo de análise tem raros exemplos na literatura por ser caro em termos de tempo de telescópio. Entretanto, é de fácil justificativa, considerando que traz novas informações que podem ser utilizadas para aperfeiçoar modelos teóricos acerca da formação e evolução de galáxias. Um algoritmo por nós desenvolvido foi utilizado para obter as distribuições de velocidades como Gaussianas generalizadas (polinômios de Gauss-Hermite), o que traz um ingrediente a mais neste tipo de estudo que, tradicionalmente, se utiliza de Gaussianas puras, uma hipótese nem sempre razoável. Apresentaremos os resultados deste trabalho, que incluem um diagnóstico para a identificação de barras recém formadas, e testes para o modelo isotérmico de discos. Mostraremos que: (i) a escolha das estrelas padrão em velocidade, e dos parâmetros da Gaussiana, deve ser muito bem justificada já que tem influência significativa nos resultados; (ii) muitas galáxias apresentam uma depressão na dispersão de velocidades na região central, que pode estar associada a um disco interno; e (iii) a dispersão de velocidades é constante ao longo da barra, nos eixos maior e menor, mas cai substancialmente quando se passa da barra para o disco.

Gadotti, D. A.; de Souza, R. E.

2003-08-01

248

Rotação do jato em DG tau próximo à região de sua formação: análise comparativa das velocidades radiais simuladas e observadas  

NASA Astrophysics Data System (ADS)

Os modelos magneto-centrífugos utilizados para explicar a formação dos jatos Herbig-Haro assumem a presença de um disco de acresção em rotação kepleriana na base de lançamento do jato. Neste cenário, o jato transmite a informação da rotação do disco para regiões distantes da fonte central, além da superfície de Alfvén, na região de colimação inicial do jato. Recentemente, Bacciotti et al. (2002, ApJ, 537, L49) obtiveram pela primeira vez uma evidência observacional de rotação em um jato HH, o jato em DG Tau, em regiões próximas da fonte central, compatível (qualitativa e quantitativamente) com o esperado a partir dos modelos magneto-centrífugos para a produção e colimação inicial de jatos HH. No presente trabalho, apresentamos mapas de velocidade radial, obtidos através de simulações numéricas tri-dimensionais SPH, para um jato com características semelhantes ao jato em DG Tau, objetivando uma comparação com os mapas de velocidade radiais obtidos por Bacciotti et al.. Nossos resultados, embora preliminares, indicam que a inclusão de efeitos como a precessão, evidenciada em DG Tau (Dougados et al. 2000, A&A, 357, L61) devem ser levadas em consideração na análise da presença de rotação não só em DG Tau mas em qualquer sistema, com o uso das velocidades radias observadas. A ausência de um grau elevado de simetria axial (quebrada, por exemplo, pela precessão do eixo do jato; ou pela presença de uma superfície interna de trabalho, ou seja, um bow shock interno), implica também em uma maior complexidade nos mapas, com conseqüências relevantes para suas interpretações.

Cerqueira, A. H.; de Gouveia dal Pino, E. M.

2003-08-01

249

Evolução rotacional de corpos reacumulados  

NASA Astrophysics Data System (ADS)

Asteróides reacumulados (rubble-piles) são corpos formados por um conjunto de fragmentos agregados primariamente pela sua gravidade. A importância do estudo de corpos reacumulados para a compreensão da evolução do Cinturão de Asteróides tem sido bastante evidenciada, não apenas pela constatação de que estes devem corresponder a uma grande parcela da população de asteróides, mas também por recentes estudos da estrutura e evolução colisional deste tipo de asteróide. A evolução rotacional de corpos reacumulados e a formação de famílias têm sido estudadas pelo nosso grupo, com base no modelo de elipsóides interagentes. Este modelo foi desenvolvido recentemente pelo grupo, e baseia-se na integração numérica das equações de movimento para translação e rotação de corpos formados por um conjunto de elipsóides que interagem entre si pela sua gravidade, força de contato e dissipação de energia por atrito. Considerar a rotação de cada fragmento é a principal diferenciação do nosso modelo em relação aos que têm sido desenvolvidos recentemente. Apresentamos aqui os resultados obtidos para a evolução da rotação de populações de corpos reacumulados. Estes foram submetidos a séries de colisões com projéteis de altas velocidades (5Km/s, típicas do Cinturão atual), distribuídos em uma lei de potências de tamanhos. Estes resultados são comparados com os de Harris (1979), um dos poucos trabalhos analíticos existentes para evolução rotacional de asteróides. O principal resultado obtido por Harris foi a distribuição final de velocidades de rotação como uma lei de potências para corpos pequenos, passando de forma bem definida para rotação constante para os grandes. Nas nossas simulações observamos que as distribuições de velocidades de rotação resultantes tendem a leis de potência, com a inclinação evoluindo no decorrer de colisões subsequentes.

Penteado, P.; Lazzaro, D.; Roig, F.; Duffard, R.; Kodama, T.

2003-08-01

250

Avaliação de Empresas de Pequeno Porte no Brasil através da Metodologia Construtivista de Apoio à Decisão MCDA-C  

Microsoft Academic Search

Esta pesquisa apresenta um método que, sob a ótica construtivista, permite construir modelos para avaliar empresas de pequeno porte no Brasil, com base nas percepções e juízos de valor do investidor. Para tanto, este trabalho se propôs a utilizar uma metodologia multicritério de apoio a decisão construtivista (MCDA-Construtivista), que permitiu operacionalizar o método aqui proposto, a fim de melhor refletir

Marcus Vinicius Andrade Lima; Leonardo Ensslin; Ana Lucia de Miranda Lopes; Ademar Dutra

2008-01-01

251

ELAIS optical ident. at 15um & 1.4GHz (Gonzalez-Solares+, 2005)  

NASA Astrophysics Data System (ADS)

To identify the mid-IR sources with optical objects we use the data from the Wide Field Survey (WFS, McMahon et al., 2001NewAR..45...97M). This survey has been carried out using the Wide Field Camera (WFC) on the 2.5-m Isaac Newton Telescope (INT) on the Observatorio del Roque de Los Muchachos (La Palma). (2 data files).

Gonzalez-Solares, E. A.; Perez-Fournon, I.; Rowan-Robinson, M.; Oliver, S.; Vaccari, M.; Lari, C.; Irwin, M.; McMahon, R. G.; Hodgkin, S.; Ciliegi, P.; Serjeant, S.; Willott, C. J.

2006-02-01

252

Compact dual wavelength 3.30 to 3.47-um DIAL lidar  

NASA Astrophysics Data System (ADS)

A compact (2'6' X 2'5' X 1'1') 3.30 - 3.47-micrometers DIAL lidar has been constructed for base remediation and chemical monitoring. The lidar system is designed for short range (0.5 km maximum) aerosol backscatter detection of light hydrocarbons with sensitivities at parts-per-million level in a 30-m ranging bin. The system can also operate in the topographic mode. The on-line and off-line wavelengths are produced sequentially using a dual crystal intra-cavity KTA OPO. Detection is by means of an 8-in Newtonian telescope coupled to a Stirling cycle cooled InSb detector. The system incorporates an onboard digital signal processor and controller, operator's interface is furnished by a laptop PC. Results of initial tests using diesel fuel and a solvent are presented.

Degtiarev, Egor V.; Geiger, Allen R.; Richmond, Richard D.

2000-07-01

253

Um protocolo de perda de peso e a participação dos proprietários no tratamento da obesidade canina  

Microsoft Academic Search

The success of a weight loss program for pets depends on the owners collaboration. Their compliance is fundamental in establishing the correct food management. The objective of this study was to compare the effectiveness of a weight loss program in two groups of dogs, one maintained under experimental conditions and the other with their owners. The same hypocaloric food was

Aulus Cavalieri Carciofi; Karina Nogueira; Venturelli Gonçalves; Ricardo Souza Vasconcellos; Rodrigo Sousa Bazolli; Márcio Antonio Brunetto; Flávio Prada

2005-01-01

254

AIR FILTER PARTICLE-SIZE EFFICIENCY TESTING FOR DIAMETERS GREATER THAN 1UM  

EPA Science Inventory

The paper discusses tests of air filter particle-size efficiency for diameters greater than 1 micrometer. valuation of air cleaner efficiencies in this size range can be quite demanding, depending on the required accuracy. uch particles have sufficient mass to require considerati...

255

A 0.18-um CMOS Array Sensor for Integrated Time-Resolved Fluorescence Detection  

PubMed Central

This paper describes the design of an active, integrated CMOS sensor array for fluorescence applications which enables time-gated, time-resolved fluorescence spectroscopy. The 64-by-64 array is sensitive to photon densities as low as 8.8 × 106 photons/cm2 with 64-point averaging and, through a differential pixel design, has a measured impulse response of better than 800 ps. Applications include both active microarrays and high-frame-rate imagers for fluorescence lifetime imaging microscopy.

Huang, Ta-chien D.; Sorgenfrei, Sebastian; Gong, Ping; Levicky, Rastislav; Shepard, Kenneth L.

2010-01-01

256

CAR dry etching technology to produce 0.13 um reticle  

NASA Astrophysics Data System (ADS)

Process optimizations have been done to carried out on '0.13micrometers ' reticle manufacturing with feature sizes of under 520nm. Micro-leading < 10nm and CD uniformity (3S) < 10nm process for binary Cr reticle can be achieved with dry etching process using chemical amplify resists blanks. HL-950 writer with resist films of 400nm and dy etching with Centura system were adopted for the purpose. It has shown that by optimizing selectivity window in Centura system without assistant gas addition, one could improve the process capability significantly. Design of experiment was applied to investigating the effects of source power, bias power and total pressure on CD uniformity, Micro-loading, Linearity and Process bias. With the DOE results, the process conditions could be fine-tuned to an optimal set of variables, which allow us to manufacture 0.13 micrometers masks.

Chou, W. Z.; Tsai, Fei-Gwo; Tuo, C. C.; Yoo, Chue-San; Tsai, T. S.; Shue, Lawrence

2002-07-01

257

"I May Be Crackin', But Um Fackin": Racial Humor in "The Watsons Go To Birmingham--1963"  

ERIC Educational Resources Information Center

This article examines the utilization of racial humor in Christopher Paul Curtis' novel, "The Watsons Go To Birmingham--1963." The theoretical perspectives that inform the analysis include critical race theory and humor theory. The results of the analysis reveal that the use of humor in this book is influenced to a significant degree by race and…

McNair, Jonda C.

2008-01-01

258

Mineral chemistry of albite-enriched granitoids at Um Ara, Southeastern Desert, Egypt  

SciTech Connect

Mineral chemistry and typomorphic characteristics are used to monitor the physicochemical evolution of late-magmatic to postmagmatic alteration processes that resulted in the development of a radioactive and albite-enriched microgranite shock. The mineral paragenesis indicates that postmagmatic fluids were enriched in Nb, Zn, U, Th, Zr, and Y, in addition to Rb, Li, and F. Manganocolumbite with extremely high Nb/(Nb+Ta) (0.99), Mn/(Mn+Fe) (0.82), and zircon with high Zr/(Zr+Hf) (0.97) indicate crystallization under alkaline, relatively high-temperature conditions (>425{degrees}C). The close association of manganocolumbite, Nb-Mn-Zn-rich ilmenite (with 1.2 to 14.5 wt% ZnO), spessartine garnet (with 68.2-89.4 mol% spessartine), zircon, xenotime, zinnwaldite mica (up to 5.98 wt% F), and fluorite indicates the strong affinity of the elements of Nb, Y, Zr, Mn, and Zn for stable complexing by K{sup +}, Na{sup +}, Li{sup +}, and F{sup -}-rich supercritical fluids during the course of extraction and transportation. The enrichment of the interacting fluid in U and Th is depicted by the presence of up to 1.6% UO{sub 2} in manganocolumbite and Hf-bearing zircon, and up to 10.5% ThO{sub 2} in monazite, in addition to locally abundant thorite and uranophane. It is suggested that the uranium mineralization, mainly as fracture fillings, formed during the waning stage of hydrothermal activity. 30 refs., 5 figs., 2 tabs.

Abdalla, Hamdy; Matsueda, Hiroharu; Ishihara, Shunso [Hokkaido Univ., Sapporo (Japan)] [and others

1994-11-01

259

O idoso nas instituições gerontológicas: um estudo na perspectiva das representações sociais  

Microsoft Academic Search

RESUMO: Este trabalho teve como objetivo identificar e comparar as representações sociais de velhice entre idosos de Grupos de Convivências (GC's) e de Instituições de Long a Permanência (ILPI's). Participaram 50 idosos (25 dos GC's e 25 das ILPI's), de ambos os sexos (60% feminina e 40% masculina), com média de idade de 82 anos. Utilizou-se Entrevistas Semi-Estruturadas, realizadas de

Ludgleydson Fernandes de Araújo; Maria da Penha de Lima Coutinho; Maria de Fátima de Souza Santos

2006-01-01

260

TIMMI: a 10-um camera for the ESO 3.6-m telescope  

Microsoft Academic Search

TIMMI is the ESO Infrared camera dedicated to 10 micrometers high angular resolution imaging of the austral sky. This camera, built for the European Southern Observatory (ESO) by the Service d'Astrophysique at Saclay (SAp), has been successfully commissioned during 2 observing runs at the ESO 3.6-m telescope: one in July 1992 and the other in January 1993. Based on a

Pierre-Olivier Lagage; Rene Jouan; Pierre Masse; P. Mestreau; Andre Tarrius; Hans U. Kaeufl

1993-01-01

261

New development of cost-effective sub-0.18-um lithography with i-line  

NASA Astrophysics Data System (ADS)

To reach the sub-0.3 micrometer contact hole pattern by i-line lithography, some advanced technology was introduced such as Phase Shift Mask (PSM) and/or photoresist (PR) flow process. It may be possible that the contact hole is patterned with 0.18 micrometer resolution by the PR flow process with PSM. However, PSM cause the Tg temperature of resist down at the phase shift area. And it also leads the bulk effect by the different pattern density at the cell edge. Thus, during the PSM + PR flow process, 'contact shift' and 'contact distortion' (so-called 'Eyebrow') defects are unavoidable. To repel these defects, we designed the new lithographic process; the UV-bake before thermal flow process. By the UV light at 130 +/- 10 degrees Celsius, the resist was cured at the resist surface. This surface-cured resist has the higher Tg temperature even the normal PSM reticle induces the Tg down. Top surface curing (hardening) also minimized the bulk effect. To maximize the UV bake effects, we developed new resist which was optimized to UV-bake process. By UV-bake process with new resist, the 0.2 micrometer contact hole was patterned. ET margin was 14 nm/10 mJ, and DOF margin was 0.6 micrometer at the mass fabrication device. The 'Eyebrow' and contact shift defects are not detected.

Chung, Hoesik; Jung, Jinhang; Kim, Youngsun; Choi, KwangSoek; Yoo, NamHee; Yoon, Sangwoong; Park, JeEung

2000-06-01

262

Scintillation measurement with 7-um-band tunable laser in different seasons  

Microsoft Academic Search

Results of the field measurement of scintillation for a 7 micrometers band semiconductor laser beam are described. To investigate the contribution of absorption, wavelength of the IR laser was tuned to a H2O absorption line center. The scintillation for a 0.67 micrometers visible laser was also monitored to compare with the IR's scintillation. This experiment was carried out in the

Naoki Kagawa; Osami Wada; Ryuji Koga

1994-01-01

263

Erosão hídrica em um Argissolo Vermelho-Amarelo, sob diferentes padrões de chuva simulada  

Microsoft Academic Search

This study was carried out in order to determine the soil, water and nutrient losses in a Yellow-Red Ultisol, under four different patterns of simulated rainfall. The experiment was conducted at the Embrapa Agrobiologia experimental field, located in the municipality of Seropédica, Rio de Janeiro, Brazil. The study consisted in the application of simulated rains using variable rainfall intensity classified

João R. de Oliveira; Marinaldo F. Pinto; Wanderley de J. Souza; José G. M. Guerra; Daniel F. de Carvalho

2010-01-01

264

COMO IMPLANTAR UM PROGRAMA DE ATIVIDADE FÍSICA NA EMPRESA: SUGESTÃO SEM IMPOSIÇÃO  

Microsoft Academic Search

This work deals with the practice of sport in the company, an expedient that has existed for a long time in European and Asian countries, later adopted in the United States, and arriving in Brazil in the second half of the past century, particularly in the South West and Southern regions - São Paulo, Paraná and Rio Grande do

José Maurício Capinussú

2005-01-01

265

Comparison of I-line and deep-UV technologies for 0.35-um lithography  

NASA Astrophysics Data System (ADS)

An experimental comparison of i-line lithography and deep-UV lithography was performed for 0.35 micrometers patterning of isolation level, polysilicon level, and the contact level. Both techniques used standard illumination and standard masks. The i-line process used conventional single level DNQ resists. The deep-UV work used a commercially available single level chemically amplified positive resist, with additional use of bottom-layer organic anti-reflective layers on some levels. The results highlighted the problems of pushing i-line lithography to the 0.35 micrometers regime and demonstrated the manufacturable process latitudes available with deep-UV lithography.

Orvek, Kevin J.; Ferrari, Joseph J.; Dass, Sasha K.; Corliss, Daniel A.; Buchanan, James R.; Piasecki, MaryAnn

1994-05-01

266

Linfoma subcutâneo de células T tipo paniculíte - A propósito de um caso clínico  

Microsoft Academic Search

T cell cutaneous lymphoma (T.C.C.L.), panni- culitis type, is a rare malignancy of postthymic T cells. A clinical case of a twenty-three year old, female patient, with a five-year evolution of recurret subcutaneous nodules and, later on, hepatosplenomegaly and fever is presented. The diagnosis was only possible with repeated cutaneous byopsies and in late stage of the disease. The patient

Marisa Antunes; Bruno Grima; Alexandra Chaveiro; Cândida Fernandes; Albertina Nunes; Ana Afonso; Maria Gomes; Nuno Riso; Vaz Riscado

267

Território, Ruralidade e Fumicultura: um estudo no Instituto Souza Cruz - Programa Cedejor  

Microsoft Academic Search

The intention of this work is to present an agroind ustry of tobacco with representation, in this in this specific case the Souza Cruz, which pr omotes programs in some localities of the South of the country propitiating the territorialit y. The entire production of the tobacco, the

GERALDINO CARNEIRO ARAÚJO; MIRIAM PINHEIRO BUENO

268

Experiments and PIC Simulations on the UM Large Area, ECR Electric Propulsion Neutralizer  

NASA Astrophysics Data System (ADS)

We report experimental and simulation results of the Getty ECR plasma source [1, 2], as a plasma neutralizer for electric propulsion. This device generates a uniform plasma over a large ECR area created by rows of permanent magnets placed between a large, S-band microwave horn and a chamber. The metal magnet bars are cross-polarized to minimize microwave reflection. Electron densities are overdense (up to 6E11 /cc) with 2.45 GHz at 100's W. Currents were extracted by biasing a collector positively with both pulsed and DC power supplies. For low DC voltages, electron currents were measured (rather than discharge currents). Experimental parameters: gas pressure, extraction voltage, microwave power, and the position and size of the collector were varied and compared. 2D MAGIC simulations of this source confirmed that most energy transfer from the microwaves into particles occurs near the ECR region, and cross-field diffusion is under investigation with MAGIC. [1] W.D. Getty and J.B. Geddes, J. Vac. Sci. Tech. B, v.12, pp. 408-415 (1994). [2] W.D. Getty, US Patent # 5,466,295 (1995).

Hidaka, Y.

2005-10-01

269

0.25-um logic manufacturability using practical 2D optical proximity correction  

NASA Astrophysics Data System (ADS)

Simplified 2-D Optical Proximity Correction (OPC) algorithms have been devised, calibrated and implemented on a state-of- the-art 0.25 micrometer random logic process in order to reduce metal line pullback on critical layers. The techniques used are rules-based, but are characterized by fast and robust data conversion algorithms, calibrations based on actual process data improvements in reticle manufacturability, and inspectability of the resultant OPC corrected reticles. Application to local interconnect and metal patterning has corrected fundamental yield-limiting mechanisms in these levels.

Kling, Michael E.; Lucas, Kevin D.; Reich, A.; Roman, Bernard J.; Chuang, Harry; Gilbert, Percy V.; Grobman, Warren D.; Travis, Edward O.; Tsui, Paul; Vuong, Tam; West, Jeff P.

1998-06-01

270

Um estudo sobre os impactos da privatização no setor de Telecomunicações brasileiras 1  

Microsoft Academic Search

The changes in the section of Brazilian telecommunications in the last five years are impressive. Of a system state monopolist, frequently inefficient and invested very on this side of the necessary, for a new section with a modern and competitive structure, impelled by great investments and aggressive investors' commitments. The privatization in the section Telecommunications increased the competition among the

Peterson Cesário Saraiva; André Luiz Cordeiro Cavalcanti

271

CLIMA ORGANIZACIONAL EM UMA EMPRESA DE GRANDE PORTE DO SETOR AUTOMOBILÍSTICO: UM ESTUDO LONGITUDINAL  

Microsoft Academic Search

The enterprise environment has become each more competitive in the last decades, increasing your degree of complexity, generating uncertainties about the future and demanding fast changes in the organizations and theirs employees. In this way, a valuation of the people in the organization is observed, in the direction to attempt against for questions related to the Management of Life Quality

Rita de Cássia Stadykoski; Silvio Roberto Stefano

272

SPIRE (f250um>17.4mJy) GOODS-N galaxies (Symeonidis+, 2011)  

NASA Astrophysics Data System (ADS)

The IR data come from the Herschel/SPIRE Science Demonstration Phase (SDP) observations of the Great Observatories Origins Deep Survey (GOODS)-North, taken as part of the Herschel Multi-tiered Extragalactic Survey (HerMES) guaranteed-time key programme. (1 data file).

Symeonidis, M.; Georgakakis, A.; Seymour, N.; Auld, R.; Bock, J.; Brisbin, D.; Buat, V.; Burgarella, D.; Chanial, P.; Clements, D. L.; Cooray, A.; Eales, S.; Farrah, D.; Franceschini, A.; Glenn, J.; Griffin, M.; Hatziminaoglou, E.; Ibar, E.; Ivison, R. J.; Mortier, A. M. J.; Oliver, S. J.; Page, M. J.; Papageorgiou, A.; Pearson, C. P.; Perez-Fournon, I.; Pohlen, M.; Rawlings, J. I.; Raymond, G.; Rodighiero, G.; Roseboom, I. G.; Rowan-Robinson, M.; Scott, D.; Smith, A. J.; Tugwell, K. E.; Vaccari, M.; Vieira, J. D.; Vigroux, L.; Wang, L.; Wright, G.

2012-06-01

273

Análise do comportamento e a habilidade de leitura: um levantamento crítico de artigos do JABA  

Microsoft Academic Search

The present work intended to identify the approach ways proposed by the Behavior Analysis to teach or remedy this skill, throughout an analysis of an article review from the Journal of Applied Behavior Analysis - JABA's over the years 1968 to 2002 about reading skills on the regular teaching. A data bank was build up from an article selection found

Luiza Cristina Mauad; Maria do Carmo Guedes; Roberta Gurgel Azzi

274

Trabalho e morbidade comum em indústria de celulose e papel: um perfil segundo setor  

Microsoft Academic Search

The purpose of this study was to identify associations between common morbidity and work accidents and the respective departments in a pulp and paper industry, describing work loads and performing broad control of potential confounding factors. We studied all the workers from a specific pulp and paper industry, using a cross-sectional design and interviews at the workplace (n=671) with a

Anaclaudia Gastal Fassa; Luiz Augusto Facchini; Marinel Mór Dall'Agnol

1996-01-01

275

New Co-containing glass ceramics saturable absorbers for 1.5-um solid state lasers  

NASA Astrophysics Data System (ADS)

New saturable absorber Q-switch for 1.54 %mum Er: glass laser is present. The saturable absorber is transparent glass ceramic containing magnesium-aluminum spinel nanocrystallites doped with tetrahedrally coordinated Co2+ ions. Q-switched pulses of up to 5.5 mJ in energy and 80 ns in duration at 1.54 micrometers were achieved. Relaxation time of the 4A2 to 4T1(4F) transition bleaching was measured to be (450+/- 150)ns. Ground-state absorption cross-sections at 1.54 micrometers wavelength were estimated to be (3.2+/- 0.4)*10-19 cm2 and (5.0+/- 0.6)X10-20 cm2, respectively. Results of study absorption and luminescence spectra of different glass ceramics on the base of magnesium-aluminum, zinc-aluminum, lithium-aluminum spinel nanocrystallites doped with tetrahedrally coordinated Co2+ ions are also analyzed.

Malyarevich, Alexander M.; Denisov, Igor A.; Yumashev, Konstantin V.; Chuvaeva, Tamara I.; Dymshits, Olga S.; Onushchenko, Alexei A.; Zhilin, Alexander A.

2001-03-01

276

Megapixel HgCdTe MWIR focal plane array with a 15-um pitch  

NASA Astrophysics Data System (ADS)

In this paper we present the first demonstration at LETI infrared laboratory of a megapixel HgCdTe MWIR focal plane array with a 15?m pitch. The detectors were interconnected by indium bumps to the CMOS readout circuit. The design of these interconnections has been adapted from the standard CEA-LETI process to achieve resolution and uniformity required by the reduced pitch: the indium bumps scale 12µm width and 7µm height. Because of the important mechanical constraints induced by the size of the component, specific developments were necessary in order to achieve the hybridization process with an extremely reduced amount of defaults. The readout circuit was designed in a 3.3V /0.35?m CMOS technology. Its main features were to allow the validation of the hybridization and technological processes. A Megapixel IRCMOS has been mounted in a dewar and fully characterized at 77K exhibiting excellent electro-optical performances and an operability greater than 99.8%.

Castelein, Pierre; Marion, Francois; Martin, Jean-Luc; Baylet, Jacques; Moussy, Norbert; Gravrand, Olivier; Durand, Alain; Chamonal, Jean-Paul; Destefanis, Gérard

2004-02-01

277

NCI Funded Research Portfolio - 1UM1CA164920-01A1 Detail  

Cancer.gov

Skip to content Your source for National Cancer Institute funded research grants, contract awards, and intramural research projects. More Home Advanced Search Funding Statistics About NFRP Contact Us Related Links Help Viewing Project « Back to results

278

Avaliação emancipatória de um Programa Educativo do Serviço de Controle de Infecção Hospitalar  

Microsoft Academic Search

Objective: To conduct a critical evaluation of an infection control educational program in a Brazilian teaching hospital in order to suggest changes as needed. Methods: This study used action research approach to collect data among 6 nurses working in an Intensive Cardiac Care Unit in a Brazilian teaching hospital in the Sao Paulo State. Paulo Freire's methodology was adopted to

Danielle Fabiana Cucolo; Josimerci Ittavo Lamana Faria; Claudia Bernardi Cesarino

2007-01-01

279

SÓCRATES E O ENSINO DE GRADUAÇÃO EM ADMINISTRAÇÃO DE EMPRESAS: PELA VALORIZAÇÃO DE UM POSICIONAMENTO CRÍTICO  

Microsoft Academic Search

Reflection is made on the role of critical thinking in the teaching of graduate Business Administration. Reference is made to one of history's notable early proponents of critical thinking, Socrates. His ideas about the need of a capability of self-analysis and consequently self- understanding are followed by a questioning about the continuing validity of knowledge possessed or that which may

Amarolinda Zanela Saccol; Luciano Munck

280

Experimental study of biological effect by Nd:YAP laser (1.34um)  

NASA Astrophysics Data System (ADS)

Objective: To evaluate the biological effect of different power, irradiation time of Nd: YAP laser (1341nm). Method: The canine skin, bronchia, stomach, bladder, uterus were irradiated with different irradiation power and time. The effect was observed by naked eyes, light microscope, and electric microscope. Result: Having positive correlation with power and irradiating time, the biological effect of Nd: YAP laser is mainly thermal coagulation effect with some gasified ablation effect. Under the condition where the diameter of faculae irradiating on canine skin was 3 mm, the thermal coagulation dose reaching deep derma was 5W 4s, 10w 1s?the thermal coagulation dose puncturing the whole layer was 5W, 6s, 10W, 4s; the thermal coagulation dose reaching whole stratum was 10W 5s, 20W 4s, 30W 2s, 40-60W 1s on stomach (Thickness 6mm), was 40W, 2s, 30W, 3s, 20W, 4s, 10W, 6s on bladder (Thickness 6mm ,irradiation underwater), was 10W, 4s on bronchia (Thickness 2 mm) and was 30W 3s, 20W 5s, 10W 6s on uterus (Thickness 6mm). Conclusion: Having positive correlation with power and irradiating time, the biological effect of Nd: YAP laser is mainly thermal coagulation effect with some gasified ablation effect. Under the condition where the diameter of faculae irradiating on canine skin was 3 mm, it is safe when the dose is 5W, and the irradiating time is less than 4s; the dose is 10W, and the irradiating time is less than 1 s. Under these conditions, the gastric area is used to coagulating and ablating. It is safe when the dose is less than 10W 5s, 20W 4s, 30W 2s. Under these condition, The bladder (thickness 6mm) is coagulated and ablated. It is safe when the dose is no more than 40W, 1s, 30W, 2s, 20W, 3s, 10W, 5s.Under the condition where bronchia (thickness 2mm) is coagulated and ablated, it is safe when the dose is less than 10W, 3s.Under the condition where uterus (thickness 6mm) is coagulated and ablated, it is safe when the dose is less than 30W, 2s, 20W, 4s, 10W, 5s.

Zhu, Jing; Zhang, Hui-Guo; Lu, Liping

2005-07-01

281

Current measurements in plasma produced by the train of 10.6-um subnanosecond laser pulses  

NASA Astrophysics Data System (ADS)

Results of current probe measurements for a plasma produced by the train of approximately 200 ps 10.6 micrometers laser pulses are reported. The train of pulses was obtained as a result of regenerative amplification of approximately 100 ps laser pulse in a 5 cm aperture 6 atm TE-CO2 laser. Experiments were carried out for Wo and Al targets dispersed in vacuum, two values of the interpulses separation in the train (Delta) T equals 9.3 and 29 ns and wide range of energy density on the target, corresponding to peak intensities of single pulses Ip equals 1 divided by 300 GW/cm2. Experiments had shown large difference of temporal structure of current signal with Wo and Al targets due to the considerable different in melting temperatures of these materials as well as radiation loses of laser plasma. We detected large ratio of current signal amplitudes for targets irradiation by the pulse train or gain switched pulse generated in TE-CO2 laser without injection of a short pulse. Results of these measurements are compared with those earlier obtained for nanosecond pulse train.

Apollonov, Victor V.; Kazakov, K. K.; Pletnyev, N. V.; Sorochenko, Vladimir R.

2000-01-01

282

Efeitos genéticos e de ambiente em um rebanho do ecótipo Mantiqueira: I. Características reprodutivas  

Microsoft Academic Search

The reproductive performance of Mantiqueira cows were analyzed using data of records of age of first calving (IPP), calving interval (IDP) and days open (PSERV). These data were the first five lactations of 1406 cows of Mantiqueira ecotype consisting of daughters of 113 sires, with calving from 1952 to 1997, from the Paraiba Valley Regional Center of Research in São

Marcos Vinicius Gualberto Barbosa Silva; Jaime Araújo Cobuci; William José Ferreira; Paulo Rogério Palma de Oliveira; Marco Antônio Machado; Cezar Parreira Ferreira

2006-01-01

283

jXChat - Um Sistema de Comunicação Eletrônica Inteligente para apoio a Educação a Distância  

Microsoft Academic Search

Synchronous communication tools are possible options for communication in distance learning environment. However, management of student's discussion and participation in these k ind o f t ool i s a ha rd task from the teacher point of view. This work proposes a model of a electronic communication system. Actually the system is a synchronous communication tool, usually called chat,

Francisco José Martins; Débora Nice Ferrari; Cláudio F. R. Geyer

284

O olhar da equipe e usuários de um hospital geral sobre a necessidade de intervenção psicológica  

Microsoft Academic Search

The intervention of the psychology professional in the hospital context is becoming more and more necessary and common. In view of this, the present article is a research report that was carried out in a public hospital in Santa Maria city in the Rio Grande do Sul state. It aims to analyses the expectations of the health staff and users

Jossiele Fighera; Eliani Venturini Viero

285

Navy of Brazil: An Emerging Power at Sea (Marinha do Brasil: Um Poder Emergente no Mar).  

National Technical Information Service (NTIS)

Captain Ferreira provides a perspective not available from one of our United States Fellows. Many observers foresee an increasingly influential place for Brazil in international affairs. Is the Brazilian Navy prepared to take on an expanded international ...

D. P. C. B. Ferreira

1983-01-01

286

Precipitation of inner zone electrons by whistler mode waves from the VLF transmitters UMS and NWC  

Microsoft Academic Search

The precipitation of energetic electrons which are commonly observed in the drift loss cone east of 60° east longitude between Lapprox.1.6 and Lapprox.1.8 can be accounted for by a Doppler-shifted cyclotron resonance between the electrons and nonducted whistler mode waves from high-power, ground-based VLF transmitters. A ray-tracing analysis using a diffusive-equilibrium model shows that 17.1-kHz waves starting with vertical wave

H. C. Koons; B. C. Edgar; A. L. Vampola

1981-01-01

287

Pulpal safety of a 9.6-um TEA CO2 laser used for caries prevention  

NASA Astrophysics Data System (ADS)

Lasers are used for several procedures involving hard and soft tissues of the oral cavity. Included in those procedures is the use of the CO2 laser to alter the surface structure of tooth enamel to render it more resistant to caries. A new 9.6micrometers wavelength TEA CO2 laser (Argu Photonics, Jpiter, FL) has been investigated as a device that can be used for this procedure without harming the dental pulp. Erupted, caries and restoration free third molars (n=24) were used in the experiment. Teeth were irradiated at an incident fluence of 1.5J/cm2 and a repetition rate of 10Hz and a spot size 1mm in diameter. At the low and high settings, 200 to 400 pulses were delivered at 12mJ per pulse for a total energy of 2.4 or 4.8J delivered for 20 or 40 seconds respectively. Other teeth were subjected to a sham dental procedure (positive control) or no procedure (negative control). Prior to testing, radiographs were taken of all teeth, and they were tested pulpally using heat, cold and electricity to determine vitality. The teeth were removed either immediately or at one week or one month after testing. They were bioprepared and examined histologically for signs of inflammation. Only one tooth developed symptoms of sensitivity to cold for 10 days following exposure to the high power level. The sensitivity was of fleeting duration and was judged to be reversible pulpitis. All teeth tested responded normally at pretesting and pre-extraction time periods. Histological examination disclosed no indication of an inflammatory response in the pulp tissue. All sections appeared normal with no changes seen in the normal pulpal morphology. We conclude that the 9.6 micrometers wavelength laser causes no pulpal damage at the energy levels used and can be used safely for caries prevention treatments.

Goodis, Harold E.; Fried, Daniel; Featherstone, John D.

2002-06-01

288

Perfil e Padrões de Prática dos Fisioterapeutas no Futebol em Portugal - um Estudo Observacional  

Microsoft Academic Search

Introduction \\/ Relevance: Sports Physiotherapy is the area of physiotherapy involved in prevention, treatment and rehabilitation of disorders and \\/ or injuries resulting from sport and \\/ or physical activity, that involves models and standards of good practices that ensure the quality of the intervention. Objectives: The purpose of this study was to identify and characterize the profile and practice

Duarte Pereira

289

Indicadores e Dilemas na Abordagem do Cooperativismo: Um Estudo Exploratório em  

Microsoft Academic Search

This article presents an interpretation about one q ualitative and quantitative investigation (of exploratory type) on indicators and dilemmas in the cooperativism, focusing in special the situation of the organizations affiliated with the Organization of the Co-operatives of State of Santa Catarina (OCESC). A bibliographical search on specialized literature was made in Annals of the EnANPADs from 2003 to 2006.

290

Process control for 0.25 um GaAs microwave monolithic integrated circuits  

NASA Astrophysics Data System (ADS)

Gallium arsenide metal semiconductor field effect transistors (GaAs MESFETs) are used in analog microwave monolithic integrated circuits (MMICs) because of their high frequency response. Common applications for MMICs include low noise and power amplifiers for use in satellite communication and missile guidance systems. The performance of MESFETs is improved with smaller gate lengths, but to consistently achieve the highest performance, control methods must be in place for the critical processes. Gate length control is the key parameter in maintaining the rf performance and a lack of gate pinch off is the major yield loss category. This paper describes the process and the tools that Texas Instruments uses to monitor the critical parameters. It also describes the control methods and reviews the major contributors to variations in the process.

Hudgens, Rick D.; Meyers, Shirley; Small, Bret A.; Salzman, Keith; Rhine, David; Class, Randy

1994-05-01

291

Zwischen Naturwissenschaft und Symbolik: Zum Spezifischen der Syphilisdarstellung in der Literatur um 1900  

Microsoft Academic Search

\\u000a Abstract.  The particular significance of syphilis as a literary theme at the turn of the 20th century is attributable to a combination\\u000a of scientific developments and social conditions which include the germ theory, the idea of biological inheritance, the bourgeois\\u000a fear of degeneration and the newly emerging discipline of public health. Symptoms that ranged from physical disfigurement\\u000a to neuropsychiatric manifestations, which

Hendrik Voss

2006-01-01

292

Sobre a quantizacao de um sistema classicamente caotico. (Quantization of classically chaotic system).  

National Technical Information Service (NTIS)

Some propeties of a quantization in terms of observables of a classically chaotic system, which exhibits a strange are studied. It is shown in particular that convenient expected values of some observables have the correct classical limit and that in thes...

N. F. Godoy

1988-01-01

293

A prescrição médica eletrônica em um hospital universitário: falhas de redação e opiniões de usuários  

Microsoft Academic Search

This study analyzed the writing failure of the computerized physician order entry system and its advantages and disadvantages according to users. At a university hospital 1,351 physician orders were analyzed and 84 nursing and medical professionals were interviewed. The results showed that 17.7% of the orders presented erasures, medication had been suspended in 16.8%, in 28.2% there was dubious or

Helena De; Bortoli Cassiani; Cláudia Câmara Freire; Fernanda Raphael; Escobar Gimenes

294

Business Intelligence no Suporte a Decisões sobre Comunicações: Descrição de um Caso  

Microsoft Academic Search

This project addresses decisions of investment on communication infrastructures in Electricidade dos Açores (EDA), the local Electric Company in the Azores Islands. The main decision was that EDA communications should be moving to Voice over IP (VoIP) from present telephone lines, outsourced to an external communications company. At the beginning, a business intelligence project was set, with the objective of

Armando B. Mendes; Paulo Jorge Alfaro; Aires Ferreira

2008-01-01

295

DESENVOLVIMENTO DE UM AÇO INOXIDÁVEL ENDURECÍVEL POR PRECIPITAÇÃO PARA MOLDES DE PLÁSTICO  

Microsoft Academic Search

The thermoplastic productive chain, usually known as plastics, have experimented intense growth. In the manufacture of goods, the use of dies and tools is essential to obtain the desired quality and productivity. The present work reports the development of a new steel for dies, called VP80, specifically to applications in processes which must bear high corrosive conditions. Plastics such as

Rafael Agnelli Mesquita; Celso Antonio Barbosa

296

Isolation of UmRrm75, a gene involved in dimorphism and virulence of Ustilago maydis  

Technology Transfer Automated Retrieval System (TEKTRAN)

Ustilago maydis displays dimorphic growth, alternating between a saprophytic haploid yeast form and a filamentous dikaryon, generated by mating of haploid cells and which is an obligate parasite. Induction of the dimorphic transition of haploid strains in vitro by change in ambient pH has been used...

297

Notas Sobre um País em Transe: Mídia e Copa do Mundo no Brasil  

Microsoft Academic Search

This paper presents some issues concerning the relation between football and culture in Brazil, since an ethnographic experience that took place during the World Cup of 1998. I analyse advertising and sports journalism discourses during the World Cup, taking into consideration the media dimension of football. Thus, I think that along with the clear participation of football on Brazilian contemporary

Édison Luis Gastaldo

298

Infixation and segmental constraint effects: UM and IN in Tagalog, Chamorro, and Toba Batak  

Microsoft Academic Search

The proper understanding of infixation continues to be a matter of debate among linguists. The data presented in this paper show that infixation in Austronesian languages is not exclusively due to Prosodic Morphology, but instead is significantly influenced by the segmental phonology as well. Specifically, infixation may be blocked if it would create dissimilation environments in the first bimoraic foot

Thomas B. Klein

2005-01-01

299

O efeito da periodização em um atleta do voleibol na areia - 1999 a 2008  

Microsoft Academic Search

The objective of the study was of determines the effect of the model of periodization in anthropometric test and physical test of the beach volleyball player during 1999 to 2008. Beach volleyball player practiced some model of periodization. One way Anova of repeated measures was significant in some tests, but Bonferroni determined the best result of the abdominal test of

Nelson Kautzner; Marques Junior

300

ATIVIDADE INOVATIVA NAS EMPRESAS PAULISTAS: UM ESTUDO A PARTIR DA PAEP-2001  

Microsoft Academic Search

This paper intends to study the relationship between inputs and outcomes from the technologic innovation. The industrial firms which had innovated in product were the object of this study, by using the Sao Paulo Economic Activity Research from 1999 to 2001 (PAEP-2001). Besides the distinction from the innovative enterprises, which innovated only to the firm and the others that innovated

Beatriz Selan; Sérgio Kannebley Júnior

2006-01-01

301

ARTIGO ARTICLE Violence a global public health problem* Violência como um problema global de saúde pública  

Microsoft Academic Search

This article is a version of the Intro- duction to the World Report on Violence and Health, published by the World Health Organiza- tion (WHO). It presents a general description about this phenomenon and points some basic questions: concepts and definitions about the theme; the state of knowledge about it; nature and typology on violence; proposal of a quantita- tive

Linda L. Dahlberg; Etienne G. Krug

302

High-power 2-um diode-pumped Tm:YAG laser  

NASA Astrophysics Data System (ADS)

Using a scalable diode end-pumping technology developed at Lawrence Livermore National Laboratory we have demonstrated a compact Tm:YAG laser capable of generating greater than 50 W of cw 2 micrometer laser output power. The design and operational characteristics of this laser, which was built originally for use in assessing laser surgical techniques, are discussed. The 2 micrometer radiation produced by the 3F4 - 3H6 transition of Tm3+ has many practical applications because it is strongly absorbed by water and also because it is an 'eye-safe' wavelength. The strong absorption of 2 micrometer radiation by water makes this transition a very attractive candidate for performing laser surgical procedures as most tissue types are predominately composed of liquid water. The fact that 2 micrometer radiation is considered 'eye-safe' makes this transition attractive for laser range finding and remote sensing applications where other laser wavelengths could pose a safety hazard. At sufficiently high doping densities, Tm3+ exhibits a beneficial two-for-one quantum pump efficiency enabling well developed AlGaAs laser diode arrays to be used as efficient excitation sources. Many applications requiring 2 micrometer laser radiation such as remote sensing, laser radar, anti sensor, sensor spoofing, and OPO pumping have driven the development of diode pumped all solid state TM3+ laser systems because of their potential for efficiency, compactness, and ruggedness. Here we focus on Tm3+:YAG and the scalable diode end-pumping technology developed at LLNL which enables higher average power operation of diode pumped Tm3+ laser systems than has previously been possible. To date we have demonstrated cw operation of this laser to power levels of 51 W. The end-pumping technology used is the same as was previously used to demonstrate a 100 mJ Q-switched Nd:YLF laser. (Truncated.)

Beach, Raymond J.; Sutton, Steven B.; Honea, E. C.; Skidmore, Jay A.; Emanuel, Mark A.

1996-03-01

303

Compact infrared zoom lens for the 3- to 5-um spectral band  

Microsoft Academic Search

The results of a comprehensive design study for the development of a compact infrared zoom lens suitable for use in guided munitions are discussed. The continuously variable zoom of the lens offers significant operational performance benefits to weapon systems using fixed or switchable FOV optics. Two practical zoom lens systems were designed that showed potential to meet typical guided munitions

R. Barry Johnson; Allen Mann; Patrick J. Reardon; Bruce R. Peters

1996-01-01

304

A QCIF Resolution Binary I\\/O CNN-UM Chip  

Microsoft Academic Search

In this paper is reported a Cellular Nonlinear Network Universal Machine realization where there are 176 × 144 active cells. The size of the network is the standardized QCIF video image format and the design is aimed to be used in segmenting video images in future video applications requiring very low bit-rate for image transmission. The achieved cell density is

Ari Paasio; Asko Kananen; Kari Halonen; Veikko Porra

1999-01-01

305

Infrared 8- to 15-um high-efficiency antireflection coating on germanium substrate  

NASA Astrophysics Data System (ADS)

To increase the strength of infrared high efficiency antireflection coatings is a problem difficult to be resolved. A mixture of BaF2 and CeF2 has been used as a low refractive index material to design and prepare infrared 8 - 11.5 (mu) high efficiency anti-reflection coating to acquire good strength of film layer. The processing conditions of the films deposition have also been introduced. The spectral transmittance measured, physical and chemical properties of the infrared anti-reflection coating are given.

Ye, Ke-Fei; Su, Zhaoxu; Liu, Jiahuan; Yang, Chongming

1998-08-01

306

High-reliability nonhermetic 1.3-um InP-based uncooled lasers  

NASA Astrophysics Data System (ADS)

We report the first uncooled non-hermetic 1.3 micrometer InP-based communication lasers that have reliability comparable to their hermetically packaged counterparts for possible applications in fiber in the loop and cable TV. The development of reliable non-hermetic semiconductor lasers would not only lead to the elimination of the costs specifically associated with hermetic packaging but also lead the way for possible revolutionary low cost optoelectronic packaging technologies. We have used Fabry-Perot capped mesa buried heterostructure (CMBH) uncooled lasers with both bulk and MQW active regions grown on n- type InP substrates by VPE and MOCVD. We find that the proper dielectric facet passivation is the key to obtain high reliability in a non-hermetic environment. The passivation protects the laser from the ambient and maintains the proper facet reflectivity to achieve desired laser characteristics. The SiO facet passivation formed by molecular beam deposition (MBD) has resulted in lasers with lifetime well in excess of the reliability goal of 3,000 hours operation at 85 degrees Celsius/90% RH/30 mA aging condition. Based on extrapolations derived experimentally, we calculate a 15 year average device hazard rate of less than 300 FITs (as against the desired 1,500 FITs) for the combination of thermal and humidity induced degradation at an ambient condition of 45 degrees Celsius/50% RH. For comparison, the average hazard rate at 45 degrees Celsius and 15 years of service is approximately 250 FITs for hermetic lasers of similar construction. A comparison of the thermal only degradation (hermetic) to the thermal plus humidity induced degradation (non-hermetic) indicates that the reliability of these nonhermetic lasers is controlled by thermal degradation only and not by moisture-induced degradation. In addition to device passivation for a non-hermetic environment, MBD-SiO maintains the optical, electrical and mechanical properties needed for high-performance laser systems.

Chand, Naresh; Osenbach, J. W.; Evanosky, T. L.; Comizzoli, Robert B.; Tsang, Won-Tien

1996-01-01

307

5GHz Oscillator Array With Reduced Flicker UpConversion in 0.13um CMOS  

Microsoft Academic Search

Voltage supply scaling in CMOS processes requires lower inductance and higher capacitance in conventional LC oscillators. Forcing several LC oscillators to run in phase is a valuable means of achieving the wanted phase noise with practical values of inductances and capacitances. However, in-phase oscillator arrays suffer from the up-conversion of transistors' flicker noise, in the presence of oscillator mismatches. A

Luca Romanò; Andrea Bonfanti; Salvatore Levantino; Carlo Samori; Andrea L. Lacaita

2006-01-01

308

Qualidade de vida e saúde: um debate necessário Quality of life and health: a necessary debate  

Microsoft Academic Search

This paper discusses the relationships between quality of life and health by applying the discourses emerging in the health sector to other fields and other disciplines. These rela- tionships constitute social representation based on subjective parameters (well-being, happi- ness, love, pleasure, personal satisfaction), and on objective ones such as satisfaction of basic needs and of the needs created by the

Maria Cecília de Souza Minayo; Zulmira Maria de Araújo Hartz; Paulo Marchiori Buss

309

Development of extended red (1.0- to 1.3-um) image intensifiers  

NASA Astrophysics Data System (ADS)

We present the development of extended near infrared based image intensifiers with InGaAs semiconductor and multi-alkali based photocathodes having 1.0-1.3 micrometers and 1.0-1.1 micrometers spectral sensitivities, respectively. For the InGaAs based image intensifiers, we study their material characteristics using transmission, photoluminescence, micro-Raman, and scanning Auger spectroscopies. Direct spectral comparison of the InGaAs image intensifiers are made to standard Generation II and III image intensifiers. Then we study the sealed NEA InGaAs image tube performance parameters such as spectral sensitivity, whitelight photoresponse, equivalent background illumination, signal-to-noise, modulation transfer function, and optical system-image intensifier field performance data. For the multi-alkali based image intensifiers, we present a direct spectral comparison of it to our NEA InGaAs and standard super Gen II image tubes. Finally, we examine the advancement of our near infrared devices into the 1.5-2.0 micrometers spectral regime.

Estrera, Joseph P.; Sinor, Timothy W.; Passmore, Keith T.; Rector, M. K.

1995-09-01

310

DRIBLANDO O SISTEMA: UM PANORAMA DO DISCURSO DAS ARTES VISUAIS BRASILEIRAS DURANTE A DITADURA1  

Microsoft Academic Search

The paper places in perspective the mechanisms of production of the Brazilian visual arts and the political situation of repression lived in the country under dictatorship. The paper studies the relevance, forms of confrontation and production of a parcel of the Brazilian visual artists who had continued producing or had theirs actions influenced by national political situation of extreme repression

Felipe Scovino

311

1.06-um laser irradiation on high-reflection coatings inside a scanning electron microscope  

Microsoft Academic Search

The output fluence of a high peak power laser like the French laser project 'Laser Megajoule' is strongly related to the damage threshold of mirrors and polarizers consisting of multilayer dielectric coatings. It has been recognized for a long time that growth defects as nodules are playing a significant role in 1.06 micrometers laser damage of these components. In order

M. Poulingue; Jean Dijon; Pierre Garrec; Philippe Lyan

1999-01-01

312

1.06-um laser irradiation on high-reflection coatings inside a scanning electron microscope  

NASA Astrophysics Data System (ADS)

The output fluence of a high peak power laser like the French laser project 'Laser Megajoule' is strongly related to the damage threshold of mirrors and polarizers consisting of multilayer dielectric coatings. It has been recognized for a long time that growth defects as nodules are playing a significant role in 1.06 micrometers laser damage of these components. In order to determine the critical parameters of the nodule and the associated mechanisms during the laser damage process, we have performed laser irradiation of samples inside the vacuum chamber of a scanning electron microscope (SEM). The SEM allows us to choose a particular area of the sample and to observe it before and after irradiation at a micro size scale. The damage evolution ca be analyzed shot by shot. In this paper, the experimental method is described. SEM pictures of irradiated laser shots are showed. Data about damage mechanisms are derived from these very high resolution morphological observations.

Poulingue, M.; Dijon, Jean; Garrec, Pierre; Lyan, Philippe

1999-04-01

313

Improved design and prototyping for a 10/20-um camera/spectrometer for ESO's VLT  

NASA Astrophysics Data System (ADS)

The Cassegrain focus of the 2nd unit telescope of ESO's VLT shall be equipped with a 10/20 micrometers camera spectrometer. This instrument shall be built by a consortium of institutes from ESO's member-states responsible for the final design. Still rather detailed internal studies were required to assess the overall scope of work, the repercussions on the telescope design and the required infrastructure at ESO. The internal studies have resulted in a multimode instrument allowing for diffraction limited imaging with variable magnification at 10/20 micrometers , low-, medium- plus potentially high-resolution long slit spectroscopy (approaching or exceeding (lambda) divided by (Delta) (lambda) approximately equals 50000). The optical design allows to take advantage of the rapid evolution in the field of detectors. Novel design features are an exchangeable entrance window, an anamorphic beam expansion and potentially the use of immersion gratings. At the La Silla observatory TIMMI, a small 10 micrometers camera/spectrometer for the 3.6 m telescope (built by the Service d'Astrophysique, CEN- Saclay, France) is in operation to allow both ESO and its community to gain practical experience in astronomy in the 10 micrometers atmospheric window. This instrument is currently equipped with a 64x64 element Ga:Si array. A 128x196 element array is presently in development at Leti/LIR of Grenoble, France, which may be used to upgrade ESO's current observing capabilities. Spectroscopy in TIMMI utilizes Germanium grisms machined via anisotropic etching. This manufacturing technology may also serve to fabricate immersion gratings from high index materials.

Kaeufl, Hans U.; Delabre, Bernard

1994-06-01

314

Draft Genome Sequence of Dematiaceous Coelomycete Pyrenochaeta sp. Strain UM 256, Isolated from Skin Scraping  

PubMed Central

Pyrenochaeta, classified under the order Pleosporales, is known to cause diseases in plants and humans. Here, we report a draft genome sequence of a Pyrenochaeta sp. isolated from a skin scraping, with an estimated genome size of 39.4 Mb. Genes associated with the synthesis of proteases, toxins, plant cell wall degradation, and multidrug resistance were found.

Yew, Su Mei; Chan, Chai Ling; Soo-Hoo, Tuck Soon; Na, Shiang Ling; Ong, Seong Siang; Hassan, Hamimah; Ngeow, Yun Fong; Hoh, Chee Choong; Lee, Kok Wei; Yee, Wai Yan

2013-01-01

315

NCI Funded Research Portfolio - 1UM1CA164974-01A1 Detail  

Cancer.gov

Skip to content Your source for National Cancer Institute funded research grants, contract awards, and intramural research projects. More Home Advanced Search Funding Statistics About NFRP Contact Us Related Links Help Viewing Project « Back to results

316

Long-wavelength optical coherence tomography at 1.7 um for enhanced imaging depth  

PubMed Central

Multiple scattering in a sample presents a significant limitation to achieve meaningful structural information at deeper penetration depths in optical coherence tomography (OCT). Previous studies suggest that the spectral region around 1.7 µm may exhibit reduced scattering coefficients in biological tissues compared to the widely used wavelengths around 1.3 µm. To investigate this long-wavelength region, we developed a wavelength-swept laser at 1.7 µm wavelength and conducted OCT or optical frequency domain imaging (OFDI) for the first time in this spectral range. The constructed laser is capable of providing a wide tuning range from 1.59 to 1.75 µm over 160 nm. When the laser was operated with a reduced tuning range over 95 nm at a repetition rate of 10.9 kHz and an average output power of 12.3 mW, the OFDI imaging system exhibited a sensitivity of about 100 dB and axial and lateral resolution of 24 µm and 14 µm, respectively. We imaged several phantom and biological samples using 1.3 µm and 1.7 µm OFDI systems and found that the depth-dependent signal decay rate is substantially lower at 1.7 µm wavelength in most, if not all samples. Our results suggest that this imaging window may offer an advantage over shorter wavelengths by increasing the penetration depths as well as enhancing image contrast at deeper penetration depths where otherwise multiple scattered photons dominate over ballistic photons.

Sharma, Utkarsh; Chang, Ernest W.; Yun, Seok H.

2009-01-01

317

OPC technology road map to 0.14-um design rules  

Microsoft Academic Search

We devised an OPC technology roadmap (Table 1) embodied in a corresponding test reticle (code named RTP4) as a benchmark for the reticle manufacturing industry. This reticle includes the polysilicon gate layer of four large ASIC-style microprocessor chips, representing four design rule generations: 0.25 micrometer, 0.20 micrometer, 0.18 micrometer, and 0.14 micrometer. In this report we summarize the challenges experienced

J. F. Chen; Tom Laidig; Kurt E. Wampler; Roger F. Caldwell; Alex R. Naderi; Douglas van de Brooke

1997-01-01

318

Laser radar using a 1.55-um passively Q-switched microchip laser  

NASA Astrophysics Data System (ADS)

We investigate a laser range finder for obstacle detection in automotive field. This device is based on the use of an eye-safe pulsed microchip laser, emitting near 1.55 micrometer. The technology of solid-state microchip lasers is a good way to obtain a compact, reliable and low cost laser source. Passively Q-switched microchip lasers are of great interest for time of flight range finding: short pulse duration and high peak power have been obtained. A short pulse duration gives good precision and high peak power gives a long range of detection. The distance measurement is obtained with an ASIC chronometer which implements the time-of- flight technique. We also developed reception circuit for start and stop signals and data input/output. The ASIC chronometer is based on two complementary techniques: a clock counter for coarse measurement and multiple slopes generator for fine measurement.

Thony, Philippe; Fulbert, Laurent; Besesty, Pascal; Ferrand, Bernard

1999-05-01

319

EFEITO DE UM PROGRAMA DE HIDROTERAPIA NA FLEXIBILIDADE E NA FORÇA MUSCULAR DE IDOSAS  

Microsoft Academic Search

Effect of a hydrotherapy program on flexibility and muscle strength in elderly women Objective: To evaluate the effect of a hydrotherapy program on flexibility and muscle strength among sedentary elderly women. Method: The participants were 31 healthy sedentary elderly women aged between 65 and 70 years (16 in the experimental group and 15 in the control group). Muscle strength tests

CANDELORO JM E CAROMANO; Monteiro Candeloro

2007-01-01

320

Zum Auf und Ab des Meeresspiegels in Skandinavien: Langer Streit um Eustasie oder Isostasie  

NASA Astrophysics Data System (ADS)

The phenomenon of the rise of the Scandinavian shield during the Holocene and the concomitant fall in level of the Baltic Sea has been investigated for centuries. Already in medieval times, there were reports about the coastlines of the Gulf of Bothnia that are full of relevant observations. During the eighteenth century, scientists such as Celsius and Linnaeus collected observations such as these. The result was that the search for the possible explanations of this rise-and-fall phenomenon intensified. The generally favoured explanation was that there was an active sinking of sea level in the Baltic rather than an active rising of the land surface in Fennoscandia. This was because water was seen as mobile, in contrast to a „terra firma". The relevant discussion was often emotional, and here, we try to illustrate it using material from the Geologenarchiv Freiburg (von Hoff, von Buch and Goethe). No more than a few decades later, it became obvious by the theory of Ice Age that both the sea level and the land could be mobile (eustatic sea level changes—glacial isostasy). Additionally, of course, plate tectonics had some influence: Norway is situated at the western end of the Eurasian plate and is part of a passive continental margin. There are still open research problems, many of which can be addressed using modern methods of satellite-based geophysics and geodesy. Some other aspects as the permanent uplift trend of Scandinavia since the Cambrium or the rhythmic to and fro of magma in the upper mantle during the Pleistocene are mentioned.

Seibold, Eugen; Seibold, Ilse

2012-03-01

321

Leishmaniose visceral em um canino de Cruz Alta, Rio Grande do Sul, Brasil  

Microsoft Academic Search

A case of visceral leishmaniasis in a five-year-old, intact male Akita presented to the Veterinary Hospital at the University of Cruz Alta, RS, Brazil after having lived in the state of Alagoas for three years is described. Clinical signs included progressive weight loss, crusty lesions on the tip of the ears, nose and periorbital region, an ulcer at the distal

Cristina Krauspenhar; Cristiane Beck; Vitor Sperotto; Aline Alves da Silva; Rodrigo Bastos; Lauro Rodrigues

2007-01-01

322

High-performance 1.3-um laser diode by LP-MOVPE  

NASA Astrophysics Data System (ADS)

The progress in 1.3 micrometers wavelength InGaAsP/InP lasers for optic fiber communication and subscriber loop applications is reviewed. By using LP-MOVPE/LPE epitaxy techniques, the performance of commercial optical devices is considerably improved. The bandwidth of the 1.3 micrometers uncooled MQW-LD module could be high to 1.6GHz, threshold current Ith < 15mA, maximum fiber output power Pf >= 20mW while uniformity, reproducible, high yield are achieved. Further by growing active layer with compressive strained structure the lowest threshold current Ith equals 3.8mA was achieved with high reflection coating and the temperature performance of the SL-MQW-LD has been greatly improved, the change of slop efficiency at 25 degrees C and 85 degrees C is less than 1 dB. Using the holographic technique a high power 1.31 micrometers InGaAsP/InP multiquantum well distributed feedback laser has also been developed. The fiber output power of butterfly packaged module with optic isolator Pf > 10mW, threshold current Ith < 18mA, slop efficiency Es > 22 percent and side mode suppression ratio SMSR > 40dB. The composite triple beat CTB < -66dBc and the composite second order CSO < -56dBc by test frequencies equals 55.25 to approximately 289.25MHz with 40 NCTA channels, the carrier to noise ration CNR > 50 dB and the relative intensity noise RIN < -160dB/Hz.

Li, Tong-Ning; Ji, Jin-Yan; Yan, Xin-Min; Liu, Tao; Ning, Zhou; Liu, Jiang; Liu, Zi-Li; Huang, Ge-Fan

1996-09-01

323

Highly Efficient Tabletop Optical Parametric Chirped Pulse Amplifier at 1 um(micro sign).  

National Technical Information Service (NTIS)

Optical parametric chirped pulse amplification (OPCPA) is a scalable technology, for ultrashort pulse amplification. Its major advantages include design simplicity, broad bandwidth, tunability, low B-integral, high contrast, and high beam quality. OPCPA i...

I. Jovanovic C. A. Ebbers B. J. Comaskey R. A. Bonner E. C. Morse

2001-01-01

324

Exploração Sexual Comercial de Crianças e Adolescentes: Um Estudo com Caminhoneiros Brasileiros1  

Microsoft Academic Search

This article aims at understanding the reasons for children and adolescents' commercial sexual exploitation by the perception of brazilian truck drivers, both clients and non clients of this service. Based on a questionnaire, interviews were made with 239 truck drivers in different regions in Brazil. The answers were categorized and analyzed using descriptive statistics (frequency and mean). The main reasons

Normanda Araujo de Morais; Elder Cerqueira-Santos; Andreína da Silva Moura; Marlene Vaz; Sílvia Koller

325

Enhanced amorphous silicon technology for 320 x 240 microbolometer arrays with a pitch of 35 um  

Microsoft Academic Search

LETI LIR has been involved in Amorphous Silicon uncooled microbolometer development for years. This technology is now in production at Sofradir and first delivery have already been done to customers. From our background in modeling and material mastering LETI\\/LIR concentrate now on performance enhancement. This is a key point for cost reduction due to the fact that signal to noise

Eric Mottin; Jean-Luc Martin; Jean-Louis Ouvrier-Buffet; Michel Vilain; Astrid Bain; Jean-Jacques Yon; Jean-Luc Tissot; Jean-Pierre Chatard

2001-01-01

326

Development of a long linear array beyond 12.5 um for earth observation  

Microsoft Academic Search

In the frame of technological preparation for scientific Earth observation, the European Space Agency (ESA) has undertaken a study program for an infrared instrument intended to be implemented on a polar platform type satellite: HRTIR (high resolution thermal infrared radiometer) will be a support for the study of land surface processes by providing reliable information on both temperature and emissivity.

Robert Davancens; Alberto S. Menardi; Louis-Pascal Angebault; Jean-Paul Chamonal

1995-01-01

327

GERAÇÃO DE ELETRICIDADE E QUALIDADE DE VIDA: ANÁLISE DE UM SISTEMA APLICADO  

Microsoft Academic Search

A biomassa é importante insumo para uso energético, porque introduz desenvolvimento local e sustentável, gera energia e com os sub-produtos proporciona renda. Esse ciclo tem como principal resultado alterações positivas na qualidade de vida para as populações envolvidas, o que é particularmente importante nas pequenas comunidades sem atendimento elétrico, sobretudo na Amazônia que têm diversas localidades isoladas dos sistemas convencionais

Artur de Souza Moret; Sinclair Mallet Guy Guerra

2012-01-01

328

Earth's spectral albedo from 0.5 to 4.4 um  

NASA Astrophysics Data System (ADS)

We have analyzed spectroscopic earthshine data to determine Earth's nightly spectral albedos covering the visible, near and middle infrared spectral ranges. Observations in the visible were undertaken from Palomar Observatory with the spectrograph in the Palomar 60" telescope and with the echelle spectrograph of the InfraRed Telescope Facility (IRTF) on Mauna Kea in Hawaii. The observing runs were chosen near the quarter moon to reduce the background glow produced by the moonshine (bright side of the Moon). Although observations were taken on different nights, the similarity of lunar phases and comparable cloud cover conditions for the monitored part of the Earth's surface, allow us to derive, for the first time, an apparent albedo of the Earth covering the entire spectral range from 0.5 to 4.4 microns.

Montanes-Rodrig, P.; Palle, E.; Goode, P. R.; Koonin, S. E.

2005-12-01

329

GNU Mages - Um Ambiente para Simulação de Múltiplos Agentes Autônomos, Cooperativos e Competitivos  

Microsoft Academic Search

We describe the implementation of a cooperative and competitive autonomous multi agents s imulation environment. The main go al of t his application is to p rovide statistical comparisons between d ifferent Artificial Intelligence algorithms applied in games. GNU Mages is free software and we hope to help all community with creation of this new open tool very useful to

João Ricardo Bittencourt; Fernando Osório

330

Um estudo das capacidades e deficiências em habilidades sociais na terceira idade  

Microsoft Academic Search

The purpose of this s tudy is to identify the social situations in which the e lderly people present abilities and difficulties to p lay in a social way. Thirty students of the Third Age Open University were interviewed. From the data analysis, a high p ercentage of positive a nswers in 6 different social situations could b e identified.

Rachel Shimba Carneiro; Eliane Mary de Oliveira Falcone

2004-01-01

331

REDE ISOBUS PARA CONTROLE E COMUNICAÇÃO DE DADOS DE UM ROBÔ AGRÍCOLA MÓVEL  

Microsoft Academic Search

RESUMO: Diante da grande necessidade de se projetar máquinas e implementos agrícolas cada vez mais automatizadas, uma forte tendência atual é o desenvolvimento de robôs móveis e veículos autônomos para área agrícola. Estes robôs e veículos, implementados com as mesmas tecnologias existentes em máquinas agrícolas, desempenham tarefas específicas com grande eficiência, originado ganhos de operação quando comparados a utilização de

EDUARDO PACIÊNCIA GODOY; GIOVANA TRIPOLONI TANGERINO; RAFAEL VIEIRA DE SOUSA; ARTHUR JOSÉ VIEIRA PORTO; RICARDO YASSUSHI INAMASU

332

New semiconductor diode laser emitting at 2 um for microsurgery applications  

Microsoft Academic Search

A surgical laser instrument is presented, based on a semiconductor diode emitting in the spectral region around 2 micrometer, in continuous mode. At this wavelength tissue absorption is via histological water, and the interaction is purely thermal. A portable laser station was built, emitting up to 250 mW of optical power at 1.94 micrometers, out of the tip of a

Pier Giorgio Gobbi; D. Ragazzi; Claudio Azzolini; Giuseppe Trabucchi; Rosario Brancato

1996-01-01

333

Das Ringen um Sinn und Anerkennung – Eine psychodynamische Sicht auf das Phänomen des Neuroenhancement (NE)  

Microsoft Academic Search

Zusammenfassung  Medizinethische Untersuchungen zum Thema Neuroenhancement (NE) wenden sich oft der Frage zu, inwiefern der Einzelne wie auch die Allgemeinheit durch NE zu Schaden kommen können. Gerechtigkeitsprobleme,\\u000a ein befürchteter Wandel des Menschenbildes oder die Gefahr einer unerwünschten, schleichenden Veränderung der Gesellschaft\\u000a werden problematisiert. Bezüglich individueller Risiken bleibt es aufgrund des vermeintlichen Zugewinns an Selbstbestimmung\\u000a und Eigenverantwortung gerne beim Verweis auf die

Marc-Andre Wulf; Ljiljana Joksimovic; Wolfgang Tress

334

Application of RTA to a 0.8-um BiCMOS process  

NASA Astrophysics Data System (ADS)

RTA has been established as a key process element in a sub-micron BiCMOS flow. The major advantage of RTA is that a temperature pulse > 1000 degree(s)C can be used to break-up the interfacial oxide in the polysilicon emitter contact to provide enhanced current gain with low-emitter resistance but with little impact on the CMOS. The RTA emitter anneal also serves to simultaneously flow BPSG to planarize the wafer prior to metallization. Contact reflow is also advantageous for a tapered structure to improve metal step-coverage.

Reuss, Robert H.

1994-02-01

335

Characteristics of GaInNAsSb/GaAs VCSELs operating near 1.55um  

NASA Astrophysics Data System (ADS)

A detailed study of the high-power pulsed operation of C-band optically-pumped GaInNAsSb vertical cavity surface emitting lasers is reported. The devices employ a resonant periodic gain structure grown by molecular beam epitaxy on a GaAs substrate with a 31-pair GaAs/AlAs bottom distributed Bragg reflector and a 4-?, GaAs-based resonant cavity containing 10 GaInNAsSb quantum wells distributed among the 7 antinodes of the electric field. A dual-pump-band SiO2/TiO2 dielectric top mirror allows efficient optical pumping via low reflectivities at 808nm and 1064nm while providing very high reflectivity at the 1.55?m target emission wavelength. The laser characteristics were evaluated using both a Q-switched Nd:YAG 1064nm pump and a 20W-peak 180ns-pulsed 850nm diode laser. The importance of the gain-cavity detuning was evident from time-dependent spectral measurements of laser material subjected to post-growth annealing at different temperatures between 725 and 775°C. The highest annealing temperature produces the largest blue shift of the gain peak relative to the cavity resonance, resulting in the best power transfer characteristics as well as reduced temperature sensitivity.

Gupta, James A.; Calvez, Stephane; Laurand, Nicolas; Weda, Jelmer; Burns, David; Poitras, Daniel; Aers, Geof C.; Dawson, Martin D.

2008-01-01

336

Characteristics of GaInNAsSb\\/GaAs VCSELs operating near 1.55um  

Microsoft Academic Search

A detailed study of the high-power pulsed operation of C-band optically-pumped GaInNAsSb vertical cavity surface emitting lasers is reported. The devices employ a resonant periodic gain structure grown by molecular beam epitaxy on a GaAs substrate with a 31-pair GaAs\\/AlAs bottom distributed Bragg reflector and a 4-lambda, GaAs-based resonant cavity containing 10 GaInNAsSb quantum wells distributed among the 7 antinodes

James A. Gupta; Stephane Calvez; Nicolas Laurand; Jelmer Weda; David Burns; Daniel Poitras; Geof C. Aers; Martin D. Dawson

2008-01-01

337

1.06 um Nd:YAG laser coagulation tonsillectomy: an animal study  

NASA Astrophysics Data System (ADS)

Tonsillectomy is one of the most frequently performed surgeries which is not free from post- operative morbidity. We have developed a non contact photocoagulation technique using 1.06 micrometers Nd:YAG laser and tested its safety and efficacy in an animal model. Eight animals were divided into the laser coagulation group (6 animals) and the laser excision group (2 animals). Tonsils of the laser coagulation animals were irradiated with 8 - 10 W of laser power for 5 - 6 min in a slow painting-like motion over the surface of a tonsil until slight blanching of mucosa was noticed. Tonsils of the laser excision group were resected with 25 - 30 W of 1.06 micrometers Nd:YAG laser power through a contact fiber. The animals were examined endoscopically at 1.5 hrs and at 2, 5, 12, 30, and 42 days post treatment. Atrophic process was followed until total disappearance of tonsillar tissue was observed. The animals were sacrificed at various time intervals and the tonsillar specimens were collected for gross and histological examination. The thermal damage to mucosa and adjacent tissues was minimal which we attribute to a low laser power and cooling from preoperative injection of saline into subcapsular space. The potential advantages of this technique include intact mucosa with no intra- or post-operative bleeding, less pain, and avoidance of general anesthesia. These advantages may enable this surgery to become an in-the-office procedure.

Wang, Zhi; Pankratov, Michail M.; Volk, Mark S.; Perrault, Donald F.; Shapshay, Stanley M.

1995-05-01

338

Pneumonite por amiodarona- -um caso clínico Amiodarone pneumonitis A clinical case report  

Microsoft Academic Search

Amiodarone is an anti-arrhythmic drug that causes many side effects, even when used in low doses (200mg\\/day). The most important non-cardiologic side effect is hyper- sensitivity pneumonitis. We present a clinic case of a man, treated with amioda- rone for one year, who was admitted with a hypersensitivity pneumonitis. The patient was treated with systemic corticosteroids and amiodarone was suspended,

Nuno Germano; Maria do Carmo Catarino; Rogélia Paula Mendonça

2002-01-01

339

TOPIC IDENTIFICATION IN DYNAMICAL TEXT BY EXTRACTING MINIM UM COMPLEXITY TIME COMPONENTS  

Microsoft Academic Search

The problem of analysing dynamically evolving textual data has recently arisen. An example of such data is the discussion ap- pearing in Internet chat lines. In this paper a recently intr oduced source separation method, termed as complexity pursuit, is applied to the problem. The method is a generalisation of projection pur- suit to time series and it is able

Ella Bingham

340

COMPETÊNCIA DOCENTE PARA O USO DAS NOVAS TECNOLOGIAS: ESTRATÉGIA DE UM ESPAÇO VIRTUAL DE APRENDIZAGEM  

Microsoft Academic Search

The present work is the result of a practice accomplished during the Pedagogy Course of the Salesian College of São Paulo showing the relationships between building and using the site of the course and the development of competences in both students and teachers as for the use of virtual learning environments. It is believed that the new technologies, specially the

Maria L. Tarcia

341

Zum Auf und Ab des Meeresspiegels in Skandinavien: Langer Streit um Eustasie oder Isostasie  

Microsoft Academic Search

The phenomenon of the rise of the Scandinavian shield during the Holocene and the concomitant fall in level of the Baltic\\u000a Sea has been investigated for centuries. Already in medieval times, there were reports about the coastlines of the Gulf of\\u000a Bothnia that are full of relevant observations. During the eighteenth century, scientists such as Celsius and Linnaeus collected\\u000a observations

Eugen SeiboldIlse Seibold; Ilse Seibold

2011-01-01

342

Gradientes de abundâncias em galáxias espirais  

NASA Astrophysics Data System (ADS)

Gradientes de abundâncias obtidos através de observações de regiões H II têm um papel importante no estudo de formação e evolução de galáxias espirais. Determinações diretas de abundâncias somente são obtidas quando linhas de emissão sensíveis à temperatura eletrônica (e.g., [O III]l4363) são detectadas. Infelizmente estas linhas são fracas ou não observadas em regiões H II de baixa excitação. Nestes casos métodos empíricos são utilizados para estimar as abundâncias químicas. Entretanto, diferentes métodos têm produzido diferentes estimativas de gradientes de abundâncias. Neste trabalho, nós construímos modelos de fotoionização com o objetivo de descrever diagramas de diagnósticos construídos com dados publicados de algumas galáxias espirais normais e barradas. Comparações entre nossas estimativas de abundâncias e de outros métodos mostram que quando não há acordo entre eles, nossos modelos superestimam as abundâncias de O/H e N/H por um fator de 0.3 dex em relação a estimativas diretas de abundâncias, e por fator de 0.2 dex em relação a outros métodos empíricos. A origem da produção de nitrogênio nas galáxias estudadas é discutida.

Dors, O. L.., Jr.; Copetti, M. V. F.

2003-08-01

343

Validación del Cuestionario de Variables de Interacción Psicosocial (VIP): hacia un modelo de tratamiento de las conductas adictivas «guiado por la personalidad»  

Microsoft Academic Search

ObjectiveThe personality can be studied at three levels: clinical (disorders), traits and the level of interactive variables. There are valid instruments for the measurement of both first, but we do not have any that explores in a combined way the interactional level. We propose a model of «personality guided treatment» for the addictive behaviours in the direction of the one

E. J. Pedrero Pérez; M. Pérez López; S. de Ena de la Cuesta; C. Garrido Caballero

2005-01-01

344

CHERIAN'S BIVARIATE GAMMA DISTRIBUTION AS A MODEL FOR DROUGHT DATA LA DISTRIBUCIÓN GAMA BIVARIADA DE CHERIAN COMO UN MODELO PARA DATOS DE SEQUÍA  

Microsoft Academic Search

Models for drought are of primary importance for the agricultural sciences. In this note, a drought application is described by deriving the exact distribution of W=X\\/(X+Y) and the corresponding moment properties when X and Y follow Cherian's bivariate gamma distribution. Drought data from the State of Nebraska are used.

Saralees Nadarajah; Arjun K. Gupta

345

NUEVO MODELO DE ORGANIZACIÓN DE LA EDUCACIÓN SUPERIOR PARA AMÉRICA LATINA Y EL CARIBE New Model Organization of Higher Education for Latin America and the Caribean  

Microsoft Academic Search

This paper to analyze the modern university, the institutional and academic crisis, and their epistemological and social frameworks. The positivism of Higher Education of modernity in the Western world was characterized by disciplinaridad, repetition and accumulation of knowledge and bureaucratic organization untied in its academy. After a theoretical study we suggests a new organizational model of higher education based on

Evaristo Méndez

2008-01-01

346

Un modelo para el control de calidad academica de los textos de instruccion a distancia (A Model for Controlling the Academic Quality of Distance Education Texts).  

ERIC Educational Resources Information Center

In response to the need for a system of control over the academic quality of distance education texts, this article proposes a methodological model based on criteria that evaluate written materials based on their instructional quality, design, and production. A discussion and figures evaluate educational aspects of content, communication,…

Bolanos-Mora, Guiselle; And Others

1992-01-01

347

Sorbate destruction and non-enzymatic browning in model aqueous systems Destruccion de sorbatos y pardeamiento no enzimático en sistemas modelo acuosos  

Microsoft Academic Search

The effect of system composition on sorbate destruction and sensory damage due to non-enzy matic browning was studied in aqueous model systems with a water activity (aw) of 0.91 and a pH of 5.0-6.0. The rate constants of sorbate destruction could be described by first order kinetics and those from non-enzymatic browning by zero order kinetics. Both reactions were found

C. A. Campos; S. M. Alzamora; L. N. Gerschenson

1997-01-01

348

Investigación Socio-Antropológica Clásica, Focus Groups y Modelo Causal Experiencias y reflexiones sobre algunas combinaciones metodológicas innovadoras en Bolivia y Perú  

Microsoft Academic Search

The proposal of this article is to present and discuss the methodology applied in the frame of a socio-anthropological research held in Bolivia and Peru on child development and growth. The objectives of the investigation were to study the mother's perceptions (and those of other related caretakers, i.e. fathers) on their child's illness and health. The idea was to: (i)

Pierre Lefèvre; Emma Rubín de Celis

349

Fotoemissao no modelo de Anderson para compostos de terras-raras com valencia flutuante. (Photoemission in the Anderson model for rare earth compounds with floating valences).  

National Technical Information Service (NTIS)

X-ray photoemission spectra (XPS) are calculated for the spin-degenerate Anderson model of valence fluctuation compounds. Based on the renormalization group technique originally introduced by Wilson to calculate the magnetic susceptibility for the Kondo m...

H. O. Frota

1985-01-01

350

Contraceptive Prevalence Survey: Model Questionnaire (Encuesta de Prevalencia del Uso de Anticonceptivos: Cuestionario Modelo)(Etude de Predominance des Methodes Contraceptives: Questionnaire Modele).  

National Technical Information Service (NTIS)

Contraceptive Prevalence Survey (CPS) is an international research program designed to assist developing countries in carrying out periodic surveys of use and knowledge of family planning. This document presents a model questionnaire designed to elicit co...

1978-01-01

351

A Multilateral Exchange Rate Model (Un modèle de taux de change multilatéral) (Un modelo multilateral de tipos de cambio)  

Microsoft Academic Search

The general equilibrium model described in this paper was developed to facilitate the assessment of the trade effects of simultaneous changes in the exchange rates of several countries that are closely associated through foreign trade. The analysis of the trade effects of such a currency realignment requires that account be taken of the simultaneous interaction among prices, incomes, and spending

Jacques R. Artus; Rudolf R. Rhomberg

1973-01-01

352

ARTICULOS DEL CONO SUR - CHILE Evaluación de la diálisis peritoneal crónica mediante el modelo de cinética de urea 1 Evaluation of chronic peritoneal dialysis using urea kinetic modeling  

Microsoft Academic Search

Objectives: Currently, urea kinetic modeling is routinely accepted to evaluate peritoneal dialysis (PD) through the calculation of Kt\\/V (normalized whole body urea clearence) and nPNA (normalized protein equivalent of total nitrogen appearence). In paediatrics, the exact meaning and target values for these parameters are still under debate. Objective: to evaluate the mean values and correlation between ureaKt\\/V and nutritional parameters

Francisco Cano Sch

2006-01-01

353

Un Modelo Basico de Instruccion Directa Para la Ensenanza de la Metodologia de la Investigacion (Using the Basic Direct Model of Instruction To Teach an Introductory Research Model).  

ERIC Educational Resources Information Center

|This study examined the application of the Basic Direct Instruction Model (BDIM), a methodology designed to maximize student interest in instrumental and methodological courses, to graduate level educational leadership students. The research used qualitative techniques and a participatory approach with a sample of 92 beginning level Masters…

Serafin, Ana Gil

354

Modelación de episodios críticos de contaminación por material particulado (PM10) en Santiago de Chile. Comparación de la eficiencia predictiva de los modelos paramétricos y no paramétricos  

Microsoft Academic Search

ObjectiveTo evaluate the predictive efficiency of two statistical models (one parametric and the other non-parametric) to predict critical episodes of air pollution exceeding daily air quality standards in Santiago, Chile by using the next day PM10 maximum 24h value. Accurate prediction of such episodes would allow restrictive measures to be applied by health authorities to reduce their seriousness and protect

Sergio A. Alvarado; Claudio S. Silva; Dante D. Cáceres

355

Cobaias como modelo para teste de vacinas inativadas contra o herpesvírus bovino tipo 1 e o vírus da diarréia viral bovina  

Microsoft Academic Search

The present study reports the use of guinea pigs as a model to study the immunogenicity of bovine herpesvirus type 1 (BoHV-1) and bovine viral diarrhea virus (BVDV) inactivated vaccines. To this purpose, guinea pigs (60) and calves (10) were immunized twice with a 28 day interval with an experimental vaccine containing antigens of both viruses and tested for virus

Letícia Frizzo da Silva; Diego Gustavo Diel; Maria do Carmo Cilento; Rudi Weiblen; Eduardo Furtado Flores

2007-01-01

356

Modelo HACCP General para Productos Carnicos y Avicolas Perecederos, con Inhibidores Secundarios (Generic HACCP Model for Meat and Poultry Products with Secondary Inhibitors, Not Shelf Stable).  

National Technical Information Service (NTIS)

The Hazard Analysis Critical Control Point (HACCP) system is a scientific approach to process control. It is designed to prevent the occurrence of problems by assuring that controls are applied at any point in a food production system where hazardous or c...

1999-01-01

357

Modelo HACCP General para Productos Carnicos y Avicolas no Perecederos, Sin Tratamiento Termico (Generic HACCP Model for Not Heat Treated, Shelf Stable Meat and Poultry Products).  

National Technical Information Service (NTIS)

The Hazard Analysis Critical Control Point (HACCP) system is a scientific approach to process control. It is designed to prevent the occurrence of problems by assuring that controls are applied at any point in a food production system where hazardous or c...

1999-01-01

358

Evidencias de validez del test para la evaluación de la calidad de vida en adictos a sustancias psicoactivas a partir del modelo biaxial de la adicción  

Microsoft Academic Search

Validity evidence of the Health-Related Quality of Life for Drug Abusers Test based on the Biaxial Model of Addiction. The aim of this work is to show evidence of the validity of the Health-Related Quality of Life for Drug Abusers Test (HRQoLDA Test). This test was developed to measure specific HRQoL for drugs abusers, within the theoretical addiction framework of

Óscar M. Lozano; Antonio J. Rojas; Cristino Pérez; Francisco González-Sáiz; Rosario Ballesta; Bilbao Izaskun

2008-01-01

359

RELACION USO-DISPONIBILIDAD DE COMPONENTES TOPOGRAFICOS Y UN MODELO DE CALIDAD DEL HABITAT PARA EL BORREGO CIMARRON, EN SONORA, MEXICO  

Microsoft Academic Search

This study was done, in the desert ridge known as the Pico-Johnson, in the state of Sonora, Mexico, which is considered as natural habitat for the desert bighorn sheep (Ovis canadensis mexicana). In this work, we evaluate the importance of the relationship, between the bighorn sheep and the topographic component of

LÓPEZ SAAVEDRA; Raymond M. LEE; James C. DE; Gonzalo LUNA SALAZAR

360

Application of Generalized Linear Models to Data Analysis in Drinking Water Treatment Aplicacion de modelos lineales generalizados al analisis de datos en el tratamiento de agua potable  

Microsoft Academic Search

In drinking water treatment we found appropriate linear models to ex- plain dose and concentration of sulphate, dose of lime, lime application prob- ability and polymer application probability, including as explanatory variables some physical and chemical properties of raw water.

Zulma Cepeda

2005-01-01

361

Role Model Impact in the Intention to Create a Start-Up\\/Impacto del Modelo a Imitar en la Intención de Crear una Empresa  

Microsoft Academic Search

Before the person actuation, first came the intention to act. In this paper we explore the relationship between having a role model and the intention to create a new business venture. The role model is one of the key factors for the personal behavior. The persons that have entrepreneurial intentions could take community entrepreneurs and family entrepreneurs as role models.

RICARDO BOLAÑOS

2006-01-01

362

DEVELOPMENT OF A MODEL FOR IN VITRO CULTURE OF Vallisneria americana Michx. Desarrollo de un modelo de cultivo in vitro para Vallisneria americana Michx  

Microsoft Academic Search

An exploratory experimental design was developed to establish a model for Vallisneria americana Michx. following conventional in vitro culture procedures for aquatic vegetation. The design included five experiments with stages of presterilization or washing with 0.1% Tween 20 R , sterilization with NaClO and poststerilization of explants (leaf base, rhizome, caulinar apex and seeds), and culture in monophasic or biphasic

V Ruiz-Carrera; AJ Sánchez

2008-01-01

363

Caracterização de fisionomias vegetais na Amazônia oriental através de videografia aerotransportada e imagens derivadas do Modelo Linear de Mistura Espectral do sensor ETM+ do Landsat 7  

Microsoft Academic Search

The aim of this work is to evaluate the spectral response of several vegetation physiognomies in the municipality of Maraba, Para, in relation to the proportion of vegetation, shadow and soil components derived through the Linear Spectral Mixing Model (LSMM), through the Shadow percent measured in the videographic products and the comparison of the Shadow component with the Shadow percent

Adriana Gomes Affonso; Dalton de Morrison Valeriano; Getúlio Teixeira Batista

2005-01-01

364

Modelo perturbativo da teoria da difusao multigrupo para analise cinetica de reatores nucleares. (Multigroup perturbation model for kinetic analysis of nuclear reactors).  

National Technical Information Service (NTIS)

The scope of this work is the development of a multigroup perturbation theory for the purpose of Kinetic and dynamic analysis of nuclear reactors. The equations that describe the reactor behavior were presented in all generality and written in the shortha...

G. M. Souza

1989-01-01

365

La atención a las personas con esquizofrenia y otros trastornos mentales graves desde los servicios públicos: una atención integral e integrada en un modelo comunitario  

Microsoft Academic Search

The care of people with schizophrenia and other severe mental disorders remains an important aim for public mental health services, because this group are one of the most unprotected between of persons with mental illness, due to their risk of uprooting and marginality. They need well coordinated networks of health and social services, and trained and involved professionals, and the

Apuntes de Psicología; Margarita LAVIANA-CUETOS; Servicio Andaluz de Salud

366

Condições físicas em galáxias HII  

NASA Astrophysics Data System (ADS)

Galáxias HII são galáxias anãs de baixa luminosidade que apresentam alta taxa de formação estelar. Seus espectros são dominados por intensas linhas de emissão devido à fotoionização pela presença de um grande número de estrelas do tipo O e B. Nós apresentamos um catálogo espectrofotométrico de 111 galáxias HII observadas no telescópio 1.52m do ESO com o espectrógrafo Boller & Chivens. Determinamos propriedades estatísticas da amostra e derivamos condições físicas (temperatura eletrônica, densidade eletrônica) e abundâncias químicas. Para algumas galáxias, fomos também capazes de resolver espacialmente regiões de formação estelar individuais e determinar propriedades espectroscópicas para estas regiões separadamente, o que nos permitiu avaliar as flutuações das condições físico-químicas dentro das galáxias HII. Em particular, vimos que apesar das galáxias HII apresentarem formação estelar espalhada ao longo do corpo da galáxia, são objetos quimicamente homogêneos. A fim de estudar a evolução temporal dos objetos durante o tempo de vida das estrelas ionizantes construimos também alguns diagramas relacionando razões de linhas de emissão com a largura equivalente de Hb (EW(Hb)). Para interpretar tais diagramas utilizamos modelos de fotoionização para populações estelares integradas. Concluímos que as galáxias HII não correspondem a simples idéia de um burst instantâneo envolvido por um gás opaco aos fótons ionizantes e com densidade constante. As relações observadas entre razões de linhas e EW(Hb) podem ser melhor compreendidas se as galáxias HII apresentarem populações estelares mais velhas, que contribuem para o contínuo óptico observado.

Kehrig, C.; Telles, E.; Cuisinier, F.

2003-08-01

367

Ondas de choque em jatos de quasares e objetos BL Lacertae  

NASA Astrophysics Data System (ADS)

Este trabalho é parte de um projeto que vem sendo realizado há dois anos no CRAAM, cujos objetivos principais são analisar e aplicar um modelo generalizado de ondas de choque em jatos relativísticos de plasma, presentes em quasares e objetos BL Lacertae, para explicar a variabilidade observada nestes objetos. O método consiste em uma decomposição de curvas de luz em séries de explosões similares, em várias freqüências, baseando-se em uma evolução espectro-temporal média das explosões. A partir da evolução média, um ajuste de cada explosão é feito com base em equações empíricas, modificando-se apenas parâmetros específicos de cada explosão. Inicialmente o modelo foi aplicado ajustando-se as curvas de luz a explosões delineadas por uma evolução do choque em três estágios, segundo a predominância do processo de emissão: síncrotron, Compton e adiabático. Entretanto, nesta nova fase de projeto, visando uma parametrização mais concisa, uma otimização do algoritmo de ajuste e uma convergência mais rápida, a formulação para cada evento foi assumida com uma evolução em apenas dois estágios: subida e descida. Isto possibilitou uma ótima delineação das curvas de luz das fontes OV236, OJ287, 3C273 e BL Lac, entre 1980 e 2000, nas freqüências 4.8, 8.0, 14.5 e 22 GHz, utilizando-se dados do Observatório da Universidade de Michigan, do Observatório do Itapetinga (Atibaia SP) e do Observatório Metsähovi. Como conclusões importantes, verificou-se que: os parâmetros ajustados descrevem o comportamento do jato; os valores do índice que descreve a expansão do jato sugerem que o mesmo se expande de uma forma não-cônica; o campo magnético é turbulento atrás da frente de choque; e as peculiaridades das explosões são devidas à influência de grandezas tais como o coeficiente da distribuição espectral de energia dos elétrons, a intensidade de campo magnético e o fator de feixe Doppler, no início do choque.

Melo, F. E.; Botti, L. C. L.

2003-08-01

368

Diagnósticos de enfermagem identificados em pessoas com diabetes tipo 2 mediante abordagem baseada no Modelo de Orem1 Nursing diagnosis identified in people with diabetes type 2 by means of an approach based on Orem's model Diagnósticos de enfermería identificados en personas con diabetes tipo 2 a través de abordaje basado en el modelo de Orem  

Microsoft Academic Search

This research aimed to describe some of the basic conditioning factors to self-care and analyze the nursing diagnosis of the North American Nursing Diagnosis Association among diabetes type 2 carriers by means of an approach based on Orem's theory. Seven diabetic people took part in this study; they were evaluated during the period of May to June of 2006. The

Alyne Coelho Moreira Milhomem; Fabiane Fassini Mantelli; Graziela Aparecida; Valente Lima

369

Determinacao de estruturas cristalinas por difracao de raios-x: aplicacao a um complexo de lantanideo e um composto organico natural. (Determination of crystal structures by x-ray diffraction: applications to a lanthanide complex and a natural organic compound).  

National Technical Information Service (NTIS)

The study fir determining crystal structures of the Ho (ReO sub(4)) sub(3) 4 TDTD 3 H sub(2) O complex and the natural organic compound C sub(14) H sub(16) O sub(6) by X-ray diffraction are presented. The experimental equipments are described in details. ...

J. M. Miranda

1986-01-01

370

Heating a Fluid in Full Flow inside a Horizontal Cyclindrical Pipe Using Solar Energy Aquecimento de Um Fluido Em Escoamento Completamente Estabelecido No Interior de Um Tubo Cilindrico Horizontal Usando Energia Solar.  

National Technical Information Service (NTIS)

The transfer of heat in a stead laminar flow inside an horizontal cylindrical tube under solar radiation heating is discussed. It is supposed that the tube at rest and that the flow is fully developed to its profile. The mathematical analysis is limited t...

S. Cardoso

1980-01-01

371

8- to 9-um and 14- to 15-um two-color 640x486 GaAs\\/AlGaAs quantum well infrared photodetector (QWIP) focal plane array camera  

Microsoft Academic Search

An optimized long-wavelength two-color quantum well IR photodetector (QWIP) device structure has been designed. This device structure was grown on a three-inch semi- insulating GaAs substrate by molecule beam epitaxy (MBE). This wafer was processed into several 640 X 486 format monolithically integrated 8-9 and 14-15 micrometers two-color QWIP focal plane arrays (FPAs). These FPAs were then hybridized to 640

Sarath D. Gunapala; Sumith V. Bandara; Anjali Singh; John K. Liu; S. B. Rafol; Edward M. Luong; Jason M. Mumolo; N. Q. Tran; John D. Vincent; C. A. Shott; James F. Long; Paul D. Levan

1999-01-01

372

IIP Tropospheric Infrared Mapping Spectrometers (TIMS) demonstration of CO retrieval, including multi-layer, from atmospheric data acquired simultaneously in the solar reflective region near 2.3 um and the thermal emissive region near 4.7 um  

NASA Astrophysics Data System (ADS)

The NASA Earth Science Technology Office (ESTO) Instrument Incubator Program (IIP) Tropospheric Infrared Mapping Spectrometers (TIMS) have been developed to demonstrate measurement capability, when deployed in space, for multi-layer retrieval of CO from spectral measurements acquired in the solar reflective (SR) region ~ 4281 to 4301 cm-1 and in the thermal InfraRed (TIR) region ~ 2110 to 2165 cm-1. We describe joint deployment at Denver University (DU) with co-investigators there of the TIMS, and of the DU colleagues FTS, to acquire simultaneous measurements of atmospheric spectra in the SR and the TIR. The FTS provided validation radiance data for the TIMS. The TIMS retrievals of CO, H2O and CH4 agreed well with validation vs these as retrieved from the DU data, AIRS retrieval, standard models and ECMWF. The TIMS CO retrievals included column retrieved from the just the SR data, column retrieved from just the TIR data, and a simple two-layer retrieval from the combined data sets. The data were acquired in an operational mode that mimicked the operations in a conceptual application that would provide footprints, coverage, refresh time as in the Decadal Survey GEO-CAPE mission statement. Very encouraging CO precisions were achieved, e.g., the TIMS CO column retrieval from the SR data demonstrated better than the 10% precision requirement as listed on slide 32 of the GEO-CAPE Reference document http://geo- cape.larc.nasa.gov/docs/GEOMAC_FinalReport_no_costs.ppt

Mergenthaler, J. L.; Kumer, J.; Roche, A. E.; Rairden, R. L.; Blatherwick, R.; Hawat, T.; Desouza-Machado, S.; Hannon, S.; Chatfield, R. B.

2008-12-01

373

8- to 9-um and 14- to 15-um two-color 640x486 GaAs/AlGaAs quantum well infrared photodetector (QWIP) focal plane array camera  

NASA Astrophysics Data System (ADS)

An optimized long-wavelength two-color quantum well IR photodetector (QWIP) device structure has been designed. This device structure was grown on a three-inch semi- insulating GaAs substrate by molecule beam epitaxy (MBE). This wafer was processed into several 640 X 486 format monolithically integrated 8-9 and 14-15 micrometers two-color QWIP focal plane arrays (FPAs). These FPAs were then hybridized to 640 X 486 silicon CMOS readout multiplexers. A thinned FPA hybrid was integrated into a liquid helium cooled dewar to perform electrical and optical characterization and to demonstrate simultaneous two-color imagery. The 8-9 micrometers detectors in the FPA have shown background limited performance (BLIP) at 70 K operating temperature, at 300 K background with f/2 cold stop. The 14-15 micrometers detectors of the FPA have reached BLIP at 40 K operating temperature at the same background conditions. In this paper we discuss the performance of this long-wavelength dualband QWIP FPA in quantum efficiency, detectivity, noise equivalent temperature difference, uniformity, and operability.

Gunapala, Sarath D.; Bandara, Sumith V.; Singh, Anjali; Liu, John K.; Rafol, S. B.; Luong, Edward M.; Mumolo, Jason M.; Tran, N. Q.; Vincent, John D.; Shott, C. A.; Long, James F.; Levan, Paul D.

1999-07-01

374

Photonic time stretching of 102-GHz millimeter waves using 1.55-um polymer electro-optic modulator  

NASA Astrophysics Data System (ADS)

Photonic time-stretch has been proposed as a signal preprocessor to perform A/D conversion in otherwise inaccessible high frequency regimes. We have demonstrated time-stretching of MM-wave signals at frequencies up to 102 GHz down to 11 GHz , using an electrooptic modulator fabricated with the new polymer material PC-CLD. This application takes advantage of the inherent wideband capabilities of the PC-CLD material system, which has also demonstrated good optical insertion loss and high non- linearity at 1.55 micrometers . The dispersion penalty inherent to time-stretching imposes an additional bandwidth limit to that imposed by the modulator. A single-sideband modulator configuration is proposed to reduced the effect of this penalty.

Fetterman, Harold R.; Chang, Daniel H.; Erlig, Hernan; Oh, Min-Cheol; Zhang, Cheng H.; Steier, William H.; Dalton, Larry R.

2000-11-01

375

Deep ultraviolet positive resist image by dry etching (DUV PRIME): a robust process for 0.3 um contact holes  

NASA Astrophysics Data System (ADS)

Classical positive resist process for DUV is not yet available and stabilized. We noticed various limiting points such as the delay time for resist material, the limitation of thickness related to ultimate resolution, and the bulk effect. P.R.I.M.E. (Positive Resist Image by dry Etching) process technology using DUV 248 nm exposure wavelength improve solutions for each process parameters, for example, a well known and stable resist (J.S.R- U.C.B PLASMASK 200G) is used with Hexamethyldisilazane (HMDS) as silylated compound. The combination of DUV exposure and top surface imaging P.R.I.M.E. process can open contact holes down to 0.3 micrometers with a large process window and a good wafer uniformity. This publication will show the improvement of each process parameter. Extended information will be given for process latitude (focus and exposure). We demonstrated and verified the feasibility of the contact holes process by etching 1 micrometers oxide (BPSG + USG) through the PRIME process lithography.

Louis, Didier; Laporte, Philippe; Molle, Pascale; Ullmann, H.

1994-05-01

376

Traços de auto-organização: um estudo de caso na indústria de calçados em Fortaleza - Ceará - Brasil  

Microsoft Academic Search

This research intends to identify the features of auto-organization through the study of a case in the shoe industry in the city of Fortaleza - Brazil. Graphics and diagrams were elaborated as a casual link, to identify circular connections, to imply as a feature of auto-organization in the process of: 1) physic flow of raw material and finished products; 2)

Alexandre Gomes Galindo; Alexandre Araujo; Cavalcante Soares; Fabrício Augusto; Freitas Melo; Carlos Artur Sobreira Rocha

377

A Study of Similarity Functions in the Planetary Boundary Layer Um Estudo das Funcoes de Similaridade DA Camada Limite Planetaria.  

National Technical Information Service (NTIS)

Micrometeorological data obtained over tropical savannah (Koorin Experiment, 16 deg 16'S; 133 deg 23'E, Australia) were used to evaluate the similarity functions A, B and C in the planetary boundary layer. Different flux profile relationships, and scaling...

J. C. S. Chagas

1982-01-01

378

High-speed laser diagnostics at 1.06 um with simultaneous percussion hole drilling of aerospace materials  

Microsoft Academic Search

A diagnostic system was designed, fabricated and tested for measuring a Nd:YAG laser's performance using a five-axis laser machining center. Far field beam profile, beam quality, beam tilt and beam power were measured at high frequencies while holes were simultaneously percussion drilled in aerospace materials used in gas turbine engines. The system allowed determination of effects of varying laser and

Philip R. Cunningham; Marc Fahndrich; Jeffrey W. Oliver; Thomas S. Bertlesen; Richard W. Frye

1993-01-01

379

Burnout em Oncologia: um estudo com profissionais de Enfermagem Burnout in Oncology: a study of Nursing professionals  

Microsoft Academic Search

Objective: To verify if licensed practical nurses and Nursing technicians working at an Oncology department present burnout syndrome. Methods: Data of 21 licensed practical nurses and Nursing technicians who had worked for, at least, one year at the Oncology department of a large hospital in the city of São Paulo, Brazil, were collected. The burnout inventory developed by Maslach and

Stephanie Kitze; Andrea Bezerra Rodrigues

380

Burnout in Oncology: a study of Nursing professionals Burnout em Oncologia: um estudo com profissionais de Enfermagem  

Microsoft Academic Search

Objective: To verify if licensed practical nurses and Nursing technicians working at an Oncology department present burnout syndrome. Methods: Data of 21 licensed practical nurses and Nursing technicians who had worked for, at least, one year at the Oncology department of a large hospital in the city of São Paulo, Brazil, were collected. The burnout inventory developed by Maslach and

Stephanie Kitze; Andrea Bezerra Rodrigues

381

Emissivity measurements for YSZ thermal barrier coating at high temperatures using a 1.6-um single-wavelength pyrometer  

Microsoft Academic Search

A method that employs an integrating sphere and a single-wavelength (1.5-micrometers ) pyrometer to measure the spectral effective emissivities of YSZ thermal barrier coatings in the temperature range (approximately 650 to 1050 degree(s)C) is described. The effective spectral emissivities for two YSZ samples are measured as a function of the heat cycle duration. An increase in the emissivity of the

Sami D. Alaruri; Lisa Bianchini; Andrew Brewington

1998-01-01

382

Resist coating optimization on eight inches Deep-UV litho cell: modelization and application to 0.25 um technology  

NASA Astrophysics Data System (ADS)

One of the main problem for 0.25 micrometers features will be the depth of focus; Deep UV source will be necessary, but anyway DOF will be in the one micron range. So will it be possible to have CD in specifications all over the field? Many parameters have to be checked and monitored but the photoresist thickness on wafer is an important part due to the interferences franges created inside the photoresist during exposure. In order to reduce this phenomenon, we are used to choose the thickness on the flat part of the swing curve, for maximum or minimum coupling. As the wavelength is being lower, from 365 nm on i-line steppers to 248 nm on Deep UV steppers, this flat part length is reduced, so to obtain the same CD's repeatability the photoresist thickness uniformity must be improved in Deep-UV. This paper presents an effective method to obtain a Deep UV photoresist uniformity allowing 0.25 micrometers CD's in specification on the whole 8' wafer. A great number of process parameters may affect the resist coating uniformity, so we have decided to use the Designs Of Experiments to solve such a complicated problem with a minimum number of experiments. Due to the centrifuging process used to coat the resist on the wafer, the main uniformity default that can appear is a radial default. So we have chosen a combination of Taguchi and Response Surface Methods, in order to minimize the thickness variations versus the radius. First of all, to evaluate the effects of the 8 process parameters on this response, we have performed a screening design of 16 experiments. A statistical analysis has shown that the thickness variations depend on only 5 parameters. Then a Response Surface design of experiments has been achieved, with 27 experiments. A very accurate modelization of the uniformity default has been carried out from this design, and the optimization has led to a thickness standard deviation of only 3.3 angstrom on the whole wafer. Moreover the quality of the modelization, predictive in the complete domain, will allow to work out further problems.

Boutin, Daniel; Blash, Andrew A.; Caire, Jean P.; Poncet, Dominique; Fanton, Pierre; Danielou, Marianne; Previtali, Bernard

1995-05-01

383

Planarizing BARC 0.32-um i-line lithography process for the reduction of intradie CD variation  

NASA Astrophysics Data System (ADS)

The effects of increasing bottom-side anti-reflective coating (BARC) thickness on the CD distribution within a device are presented. In conjunction with the increasing BARC thickness, reductions in the photoresist thickness are shown to be beneficial. Significant reductions in CD variability and increases in the depth of focus versus CD spread are achieved with increased BARC and reduced photoresist thickness. Although significant improvements are seen with a thicker BARC film for the photolithography process, the importance of optimizing the etch process for the thicker films is shown. The effects of CD distribution on important electrical device parameters are also presented.

Johnson, Jeffrey R.; Davis, Audrey M.; Bair, Andrew E.; Nunan, Peter D.; Spinner, Charles R.; Spak, Mark A.; Dammel, Ralph R.

1997-07-01

384

Numerische Simulation Laminarer Hyperschall-Stroemungen Um Ellipsoide (Numerical Simulation of Laminar Hypersonic Flows About an Ellipsoid).  

National Technical Information Service (NTIS)

The laminar hypersonic flow about a double ellipsoid, which idealizes the nose and cockpit of a spacecraft, were numerically simulated. The calculation method solves the three dimensional thin layer Navier-Stokes equations in a conservative formulation on...

S. Riedelbauch B. Mueller

1988-01-01

385

Fabrication of 0.25-um electrode width SAW filters using x-ray lithography with a laser plasma source  

Microsoft Academic Search

A process for the fabrication of surface acoustic wave (SAW) devices with line widths of 250 nm and less, based on x-ray lithography using a laser-plasma source has been developed. The x-ray lithography process is based on keV x-ray emission from Cu plasma produced by 15 Hz, 50 ps, 248 nm KrF excimer laser pulses. The full structure of a

Romuald Bobkowski; Yunlei Li; Robert Fedosejevs; James N. Broughton

1996-01-01

386

Random Anisotropy Effects in Ising Spin Glass Efeitos de Anisotropia Aleatoria Em Um Spin Glass de Ising.  

National Technical Information Service (NTIS)

The thermodynamic properties of an Ising model for a spin glass are studied by mean field theory. Crystal field effects are considered and the crystal field parameter fluctuates about a mean value. The exchange is random with finite range but has a mean v...

M. C. Forti

1981-01-01

387

Propriedades físico-química e mineralógica de um perfil aluvionar de uso em cerâmica estrutural no Ceará  

Microsoft Academic Search

Russas' ceramic pole, situated in the east region of Ceará, is used to tiles and bricks production. In this paper, raw material's characterization was done to the understanding the mineralogical and physico- chemical properties of its composition. For this, sampling, mineralogical analysis and physico-chemical tests were made. Field observations showed that raw materials are explored until 3.0m depth. In this

Raimundo Humberto Cavalcante Lima; Maria Margarita Torres Moreno; Simone Ferreira Diniz

388

Pulsed-laser-induced damage in semiconductors Ge, ZnS, and ZnSe at 10.6um  

NASA Astrophysics Data System (ADS)

Laser irradiation induced damage to several materials of interest for use as 10.6 micrometers laser system windows is investigated in this paper. The irradiation source in these single shot experiments was a pulsed TEA CO2 laser. Damage initiation in semiconductors has been studied during the interaction by measuring the variation of the transmitted intensity of a He- Ne and a CO2 cw lasers through the samples. Results show that damages appear at the beginning of the laser-matter interaction process on both surfaces and in the bulk of the materials. The damaged materials have been characterized for various incident fluences by means of optical microscopy and scanning electron microscopy in terms of topography and morphology. The modified surface chemical analysis and the structural analysis have been carried out using energy dispersive x-ray and Raman spectroscopy.

Lefranc, Sebastien; Kudriavtsev, Eugene M.; Autric, Michel L.

1998-04-01

389

INFLUÊNCIA DA APLICAÇÃO DE ÁGUAS RESIDUÁRIAS DE SUINOCULTURA NA CAPACIDADE DE INFILTRAÇÃO DE UM SOLO PODZÓLICO VERMELHO-AMARELO 1  

Microsoft Academic Search

This work was carried out at the Experimental Area of Hydraulics, Irrigation and Drainage of the Agricultural Engineering Department, at the Federal University of Viçosa, Viçosa, Minas Gerais, Brazil. The aim was to evaluate the influence of successive applications of swine wastewater, with different concentrations of total solids, on the infiltration capacity of a Yellow Red Podzol. The experiment was

Rubens Alves Oliveira; Paulo Luis Gonçalves Campelo; Antônio Teixeira Matos; Mauro Aparecido Martinez; Paulo Roberto Cecon

390

Características físicas e físico-químicas de um tipo de bacuri (Platonia insignis Mart.) com rendimento industrial superior  

Microsoft Academic Search

Physical and physicochemical characterization were carried out on bacuri CPATU 207-3, originated from a mother-plant of the Germplasm Bank of Embrapa Amazônia Oriental. Fifty fruits were used for the physical characterization. Each fruit was characterized on the following aspects: color of the epicarp, shape, weight, length, diameter, thickness of the shell and the relative proportion (w\\/w) of the shell, pulp,

José Edmar Urano de Carvalho; Raimunda Fátima Ribeiro de Nazaré; Walnice Maria Oliveira do Nascimento

2003-01-01

391

Síndroma de abstinência alco- ólica - a propósito de um estu- do retrospectivo Alcohol Withdrawal Syndrome - a retrospecti- ve study  

Microsoft Academic Search

Alcohol consumption in our country remains high, with effects in different health areas, namely at the in- patient level. In this article we aimed to study the natural history of alcohol withdrawal syndrome, the different therapeutic approaches and the reference strategies after discharge. In order to do so, a retrospective study was performed and 81 in-patients with the diagnosis (primary

Pedro P Marques; João Namora

2001-01-01

392

A Compact SPDT Switch in 0.18um CMOS Process With High Linearity and Low Insertion Loss  

Microsoft Academic Search

A compact CMOS SPDT switch fabricated in 0.18 mum BiCMOS technology has been successfully demonstrated at X-Ku-band. The fully integrated chip exhibits a low insertion loss of 1.9 dB and an isolation of 22.5 dB at 17 GHz. By reverse biasing the source\\/drain (S\\/D) diode junctions, the switch achieves a PldB of 21 dBm and TOI greater than 30 dB

Mary Teshiba; Glenn Sakamoto; Terry Cisco

2007-01-01

393

Experimentelle Untersuchung des Instationaeren Druckfeldes Um Eine Schwingende Schaufel (Experimental Investigation of the Unsteady Pressure Field around an Oscillating Blade).  

National Technical Information Service (NTIS)

A two dimensional unsteady process for predicting the unsteady pressure distribution around an oscillating blade in homogeneous flow is presented. A data base was developed for the computation process. In order to reduce costs, the experimental building w...

C. Poensgen

1990-01-01

394

A 10GHz 2.8dB gain passive mixer in 0.18um CMOS technology  

Microsoft Academic Search

In this paper, a 10GHz high conversion gain (normally passive mixer is loss) passive mixer is proposed. By proper sizing of LO switches and matching network, the mixer is implemented in standard 0.18 µm CMOS technology. The mixer down-converts a 10 GHz RF frequency to an IF frequency of 1 GHz. An LO power of 0dBm is required to obtain

Ali Meaamar; Wei Meng Lim; Jiangmin Gu; Yang Liu; Kok Meng Lim; Kiat Seng Yeo; Jian Guo Ma; Wanlan Yang; Jinna Yan; Keping Wang; Chirn Chye Boon

2011-01-01

395

High-performance 5-um 640 x 480 HgCdTe-on-sapphire focal plane arrays  

NASA Astrophysics Data System (ADS)

A high-performance 5-micrometers 640 X 480 HgCdTe/CdTe/Al2O3 IR focal plane array (FPA) that offers full TV-compatible resolution with excellent sensitivity at temperatures below 120 K has been developed. Mean FPA D* at 95 K and background of 1014 photons/cm2 s is background-limited at approximately 1 X 1012 cm Hz1/2 W for the typical mean quantum efficiency of 60 to 70%. The key technology making this large, high-sensitivity device producible is the epitaxial growth of HgCdTe on a rugged CdTe-buffered sapphire substrate. Mean camera noise-equivalent temperature difference NE(Delta) T of 13 mK has been achieved at

Kozlowski, Lester J.; Bailey, Robert B.; Cabelli, Scott A.; Cooper, Donald E.; Gergis, Isoris S.; Chen, Annie C.; McLevige, William V.; Bostrup, G. L.; Vural, Kadri; Tennant, William E.; Howard, Philip

1994-01-01

396

Prevalência de sobrepeso e fatores associados em crianças ingressantes no ensino fundamental em um município da região metropolitana de  

Microsoft Academic Search

This study assessed the prevalence of overweight in public school first graders and the associa- tion between overweight and socio-environ- mental factors in a city in Greater Metropolitan São Paulo, Brazil. Children enrolling in public school first grade in Cajamar in 2005 were as- sessed. Overweight was defined according to body mass index, by gender and age. Socio-en- vironmental information

Lenise Mondini

397

Design of millimeter wave optical modulators with monolithically integrated narrowband impedance matching circuits for 1.3-um photonic links  

NASA Astrophysics Data System (ADS)

To implement millimeter wave photonic links using high speed optical modulators, RF input efficiency to the modulator is an important consideration. In this paper we discuss design and fabrication of ultra high speed multiple quantum well electro-absorption modulators for narrow band applications up to 40 GHz. In order to obtain higher RF efficiency at working frequencies of 20 GHz, 25 GHz and 40 GHz, modulators with monolithically integrated matching circuits were designed and fabricated utilizing co-planar waveguide MMIC technologies. Measurement results show excellent matching at specific frequencies with S11 of -16 dB for the 20 GHz devices, -20 dB for the 25 GHz devices and -36 dB for the 40 GHz devices. At least 6 dB of improvement on optical modulation efficiency can be expected over modulators without impedance matching.

Liao, Hsin H.; Mei, X. B.; Loi, Kwok Kwong; Tu, Charles W.; Yu, Paul K.; Asbeck, Peter M.; Chang, William S.

1996-11-01

398

High-linearity and -power 1.3-um AlGaInAs strained MQW DFB-LD  

NASA Astrophysics Data System (ADS)

AlGaInAs/InP strained MQW reversed-mesa RWG structure is proposed to reduce leakage current and improve linearity, and applied to make high linearity and high power 1.3 micrometers DFB-LD. For 1.3 micrometers AlGaInAs strained MQW DFB LD, the lasers operated with 10 mA threshold current, 0.48 mW/mA slope efficiency for one facet, 45 dB SMSR. The -3 dB cutoff frequency is 14 GHz, and the eye pattern is opened widely at 10 Gb/s. Under PAL 59 channels test, output power exceeds 15 mW with COS <-69.4 dBc, CTB <-69.4 dBc, CNR <-52 dB, which is the first reported RWG 1.3 micrometers DFB-LD for optical CATV application. This implies that AlGaInAs/InP strained MQW reversed-mesa RWG structure could effectively reduce leakage current.

Shen, Kun; Wang, Ren-Fan; Yue, Ai-Wen; Yang, Hong-Tao; Fan, Shi-Bin

2002-08-01

399

O GÊNERO ORIENTAÇÃO DE MESTRADO: ESTUDO DE CASO RELATIVO AO PERÍODO DE ESCRITURA DO PROJETO DE PESQUISA DE UM MESTRANDO  

Microsoft Academic Search

The present paper investigated a postgrad uate student's research. The genre was investigated through the methodology of descriptive case study. In the theoretical foundations of the research were taken into consideration the notions of genre, the discursive community (Swales, 1990) and the system of activiti es (Bazerman, 2004). Six sessions were analyzed, recor ded in audio, aiming to analyze the

Kelly Cristina

400

Implementation of high-contrast novolak resist process for sub-0.5-um e-beam lithography  

NASA Astrophysics Data System (ADS)

The use of interrupt develop has been reported to enhance the contrast and resolution of novolak resist systems for e-beam lithography. Experience with interrupt develop has demonstrated the ability to control sensitivity and contrast independent from the exposure dose. High contrast and flexible sensitivity are primarily due to the interaction of induction effects of the novolak resist and the length of the develop step. The induction effect is primarily dependent on absorbed energy in the resist. Understanding the distribution of absorbed energy in the resist allows use of the induction effect to control resist profile and image size. A sidewall passivation phenomena results from interrupting the develop process. The passivation enhances the directionality of develop, yielding additional resist profile control. Three diazonapthoquinone novolak resists have been implemented for the fabrication of x-ray masks. During implementation of the resists, the molecular weight of the base resin was found to have a major influence on contrast and image quality. The results show the resolution and image size control achieved using systematic interrupt develop processing.

Williams, Dennis J.

1994-12-01

401

Negative differential gain in 1.3um quantum dot lasers: comparison of self-heating and free carrier effects  

NASA Astrophysics Data System (ADS)

A comparative study of the gain spectra of quantum-dot lasers at high carrier densities is reported. The gain spectra of quantum dot lasers under a constant junction temperature (obtained by the use of Fabry-Perot modes as a temperature gauge) and under constant heat-sink temperatures are measured. Negative differential gain, observed for the ensemble of quantum dot ground-states is shown to be mainly due to free carrier effects, where increasing dephasing effects, combined with saturated gain, result in spectral broadening and a reduction in the peak gain.

Shahid, H.; Childs, D. T. D.; Stevens, B. J.; Hogg, R. A.

2012-02-01

402

Near-achromatic retardance behavior of HN22 Polaroid 3.6 to 5.4 um  

NASA Astrophysics Data System (ADS)

Polaroid HN22, a popular sheet polarizer, has been measured to be a nearly half wave retarder in the 3.6 to 5.4 micrometers spectral band with a transmittance of approximately 20 percent. The exact retardance value may be tuned to the range of 60 degrees - 260 degrees by tilting the HN22 with respect to the incident beam. The material's polarizing effects have been shown to be minimal in this waveband. Its availability, relatively large available aperture, large filed of view, and low cost make HN22 an excellent candidate for use as an IR retarder for systems operating from 3.6 to 5.4 micrometers . As such, HN22 may be used for rotating the plane of polarization of an incident linearly polarized beam as well as to convert between circular polarization states.

Lompado, Arthur; Sornsin, Elizabeth A.; Chipman, Russell A.

1997-10-01

403

~2.1 um Tm3+-Ho3+ co-doped tungsten tellurite single mode fiber laser  

NASA Astrophysics Data System (ADS)

We investigate the spectroscopic and lasing performance of Tm3+-Ho3+ co-doped tungsten tellurite single mode fiber operating around 2.1 ?m with a commercial 800 nm diode laser pump source. The optimum doping concentration of Tm2O3 and Ho2O3 in Tm3+-Ho3+ co-doped TeO2-WO3-La2O3 (TWL) glass is 1 mol% and 0.5 mol%, respectively. The lifetime of Ho3+:5I7 level is 3.3 ms in the bulk glass. The maximum stimulated emission cross-section of Ho3+ in TWL is 10.0×10-21cm2. The tungsten tellurite single mode fibers are prepared by using rod-in-tube method. The infrared emission spectra are compared with varying fiber lengths. Tm3+-Ho3+ co-doped fiber shows weak emission at ~1.9 ?m very strong emission at ~2.1 ?m, which indicates efficient energy transfer from Tm3+ to Ho3+ in the fiber. The 1.47 ?m emission increases with the increment of the fiber length, which means a back energy transfer from Ho3+ to Tm3+. A 106 mW continuous wave laser emission at ~2.1 ?m is demonstrated from a 16 cm length of this fiber, the slope efficiency is 23%, corresponding to a 17% optical to optical efficiency. Lasing has also been achieved in <5 cm length of this fiber, making this material a promising candidate for single frequency ~2.1 ?m laser sources.

Li, Kefeng; Zhang, Guang; Hu, Lili; Wang, Meng; Chen, Danping

2012-02-01

404

Technology of electroplating copper with low-K material aC:F for 0.15-um damascence interconnection  

Microsoft Academic Search

In our work, fluorinated amorphous carbon films (a-C:F) was deposited by PECVD. The amorphous carbon films (a-C:F) with low dielectric constant (K-2.3), thermal stability and acceptable adhesion to cap-layer such as SiOF was obtained by optimum of content ration between carbon with fluorine and adding few SiH4 for improvement of adhesion. The etching profile with high aspect ratio and etching

Jia-Min Shieh; Shich-Chang Suen; Kuen-Chaung Lin; Shih-Chieh Chang; Bau-Tong Dai; Chia-Fu Chen; Ming Shiann Feng

2000-01-01

405

Technology of electroplating copper with low-K material a-C:F for 0.15-um damascence interconnection  

NASA Astrophysics Data System (ADS)

In our work, fluorinated amorphous carbon films (a-C:F) was deposited by PECVD. The amorphous carbon films (a-C:F) with low dielectric constant (K-2.3), thermal stability and acceptable adhesion to cap-layer such as SiOF was obtained by optimum of content ration between carbon with fluorine and adding few SiH4 for improvement of adhesion. The etching profile with high aspect ratio and etching selection ration more than 50 (a- C:F/SiOF) were obtained by etching gas of N2+O2. Furthermore, we demonstrated the technology of electroplating copper in trenches or vias as small as 0.15 micrometers , 6:1 AR. The wetting agent system was consisted of mainly two molecular weights polyethylene glycols (PEG). The small molecular weight PEG with better diffusion ability for reducing the surface tension and the larger PEG enhancing grain growth control was proposed for the first time to wet the inner portion of the sub- 150 nm damascene feature. The leveling agent system was mainly heterocyclic compound contained N, S atoms offering sufficient activation over-potential and selective inhibition gradient.

Shieh, Jia-Min; Suen, Shich-Chang; Lin, Kuen-Chaung; Chang, Shih-Chieh; Dai, Bau-Tong; Chen, Chia-Fu; Feng, Ming Shiann

2000-08-01

406

Photoablation with the free-electron laser between 10 and 15 um in biological soft tissue (cornea)  

NASA Astrophysics Data System (ADS)

The ablation depth and collateral thermal damage for pulsed IR photoablation as a function of wavelength with the free- electron laser (FEL) at 10.1, 11.8, 12.8, and 14.5 micrometers wavelengths is investigated. FEL data are compared with the blow-off and the continuous ablation models. Porcine cadaver corneas were used as target material. The experimental data are compared with theoretical calculations for both models. At low water absorption the additional absorption of the cornea was taken into account. FEL data were: energy per pulse between 15.6 and 17.8 mJ, ablation zone around 0.2 mm2, and pulse length 4 microsecond(s) . In this wavelength range an effective photoablation of biological materials with a high water content can be achieved. The measured FEL data of ablation depth fail to confirm the blow-off model, describing ablation depth sufficiently well. The wavelength, collagen absorption contributes to the overall absorption of corneal tissue. The ablation depth can only be described by the continuous ablation model; however, the collateral thermal damage pattern can be described by both models.

Walker, Rudolf; Ostertag, Manfred; van der Meer, Alexander F.; Bende, Thomas; Schmiedt, Karl C.; Jean, Benedikt J.

1997-04-01

407

Lazer, Educação e Teoria das Inteligências Múltiplas: Resultados Preliminares de um Estudo com Crianças e Pré- Adolescentes  

Microsoft Academic Search

An interdisciplinary project that has involved Fafibe's Undergraduate Bachelor and Teacher Physical Education Courses and it has had as purpose to study Multiple Intelligences Theory and its relation and potential with plays and games in leisure education, through the research, and the cultural dissemination from the extension. We had as main purpose to comprehend the leisure as a sociocultural component

L. F Silva; J. L. Justino; P. A. Cotrim

408

Avaliação dos fatores de risco para mucosite oral em um grupo de pa- cientes sob terapia de transplante  

Microsoft Academic Search

The bone marrow transplantation is a procedure where agressive medications are used. One of complications that determine the morbidity to the patients is the oral mucositis. Objective: to identify the risk factors associated with the appearance of early oral mucositis in patients undergoing bone marrow transplant (BMT) in Santa Casa Hospital in São Paulo. Material and method: we retrospectively re-

Ivo Bussoloti

2007-01-01

409

Polarizers at 1.053 um deposited on silica substrate for high laser flux applications in a vacuum  

Microsoft Academic Search

The French Megajoule Project requires polarizers with high laser-induced damage thresholds. Such polarizers must be deposited on silica substrates, which are commonly prone to stress leading to early failure. Better stress control in the films require an optimization of the stack design as well as the deposition parameters. The thermal e-beam technique is used. We present the spectral behavior of

Bernard Geenen; Herve Leplan; B. Pinot; W. Alexandre; P. Pally; Larry A. Roussel; Odile Lam

1996-01-01

410

Polarizers at 1.053 um deposited on silica substrate for high laser flux applications in a vacuum  

NASA Astrophysics Data System (ADS)

The French Megajoule Project requires polarizers with high laser-induced damage thresholds. Such polarizers must be deposited on silica substrates, which are commonly prone to stress leading to early failure. Better stress control in the films require an optimization of the stack design as well as the deposition parameters. The thermal e-beam technique is used. We present the spectral behavior of such 1.03 micrometers polarizers in air and under vacuum at the Brewster incidence angle of 55 degrees 4 along with the damage test results.

Geenen, Bernard; Leplan, Herve; Pinot, B.; Alexandre, W.; Pally, P.; Roussel, Larry A.; Lam, Odile

1996-08-01

411

Thermal and chemical modification of dentin by pulsed CO2 laser irradiation at 9 to 11 um  

Microsoft Academic Search

Previous studies have shown that dentin can be thermally modified by pulsed CO2 laser irradiation to form a more highly mineralized tissue. The implications are important for the potential laser modification or removal of dentinal and root caries. Temperature excursions were followed after (lambda) equals 9.3, 9.6, 10.3, and 10.6 micrometers laser irradiation with pulses of 100 (Mu) s duration

Daniel S. Fried; Michael J. Zuerlein; John D. Featherstone; Darren Machule

1997-01-01

412

Implantação e funcionalidades de um sistema de informação geográfica mineral na Companhia Vale do Rio Doce - CVRD  

Microsoft Academic Search

This work develops a geoprocessing application model to the necessities of a mining company in technician works about geologic evaluation resources and mineral research, enclosing governmental factors. A model for the implantation of a System of Geographic Information is presented, with the use of geoprocessing techniques, the organization in a georreferenced data base is possible, centered and in the same

Patrícia Procópio Calazans

413

Analysis of Phase Noise in a J Band Transmitter Analise Do Ruido de Um Transmissor NA Faixa J.  

National Technical Information Service (NTIS)

The phase noise analysis of a frequency generation system using synthesizers and multipliers is described. Rules are shown which can be used in the definition of the system block diagram. An example is presented for a transmitter in band J.

W. J. Fleming

1981-01-01

414

Estudos do sistema de vacuo para um acelerador linear de eletrons. (Studies of vacuum systems for a linear electron acelerator).  

National Technical Information Service (NTIS)

In the study of vaccum parameter system in the structure of a linear electron accelerator feeded by radio-frequency, the periodical release of adsorbed gases should be considered. For high power machines a structure inside a vaccum shield are recommended....

O. L. Goncalez R. Silva

1985-01-01

415

Distribuição e abundância de ninhos de Solenopsis invicta Buren (Hymenoptera: Formicidae) em um agroecossistema diversificado sob manejo orgânico  

Microsoft Academic Search

The distribution of Solenopsis invicta Buren (Hymenoptera: Formicidae) nests, the effect of abiotic factors on the species population density, and possible influence on species richness of other ants were investigated in a diversified agroecosystem in the Southeast of Brazil. Plots cultivated with different crops were sampled in the Sistema Integrado de Produção Agroecológica, in Seropedica, RJ, Brazil. The nest distribution

Fábio Souto Almeida; Jarbas Marçal Queiroz; Antônio José Mayhé-Nunes

2007-01-01

416

Evaluation of 0.4- to 2.2-um atmospheric correction techniques using the spectral similarity scale  

NASA Astrophysics Data System (ADS)

The purpose of this research study is to evaluate the effectiveness of atmospheric correction and radiometric calibration techniques by measuring the differences of corrected data and ground truth spectra. Several atmospheric correction methods have been performed utilizing the ATREM and ACORN software packages. A variety of different settings (14 for ATREM and 5 for ACORN) have been tested and evaluated. The Spectral Similarity Scale (SSS) developed by BAE SYSTEMS is a measure of spectral similarity based on spectral magnitude and shape. The SSS-based spectral comparison process indicates that the default settings for iron rich soils are the best ATREM inputs for the Shelton, NEAVIRIS scene. The SSS comparison of the ACORN results with the spectral ground truth revealed that ACORN with the artifact type 1 was the best correction setting available for both ATREM and ACORN. For atmospheric water we find that ACORN is superior to ATREM. ATREM does correct for gain offsets that ACORN does not correct for with default settings. When used incorrectly, it is possible to severely reduce the spectral accuracy with either software package.

Granahan, James C.; Sweet, James N.

2001-12-01

417

RELATO DE EXPERIÊNCIA: TERAPIA ASSISTIDA POR ANIMAIS (TAA) - MAIS UM RECURSO NA COMUNICAÇÃO ENTRE PACIENTE E ENFERMEIRO  

Microsoft Academic Search

This study consists of an experiment report after getting to know the benefits obtained through Animal Assisted Therapy in four health institutions of the city of São Paulo. The visits occurred in the second semester of 2001 in one place specialized in special education for children with diverse syndromes; one that houses old people who are abandoned or with no

Cíntia Hissae Kawakami; Cyntia Kaori Nakano

418

Highly efficient third harmonic generation of 1.32-um radiation of a Nd:YAG laser in KTP  

NASA Astrophysics Data System (ADS)

We report highly efficient cascade tripling of 1.32 micrometers Nd:YAG laser emission using combination of LiIO3 and KTP crystals. The generation of 0.44 micrometers radiation in KTP has been shown to occur at the purely noncritical phase-matching condition at slightly elevated temperature. Conversion efficiency of third harmonic generation in relation to second harmonic energy was approximately 60% in 4 mm long KTP crystal. The temperature and angular characteristics of conversion are presented.

Damazyan, G. S.; Sanamyan, T. V.

1999-12-01

419

New development of a long linear array for 11.3- to 12.3-um Earth observation  

Microsoft Academic Search

In the frame of technological preparation for scientific Earth observation programs, the European Space Agency (ESA) has undertaken breadboarding activities dedicated to high resolution thermal radiometer to be implemented on a Low Earth Orbit satellite. Based on the lessons learned during the previous breadboarding phase and taken into account the modification of instrument concept, a LWIR linear focal plane breadboard

Olivier Saint-Pe; Olivier Donnadieu; Robert Davancens; Zoran Sodnik; Roland Meynart; Jean Paul Chamonal; Raymond Boch; Michel Vuillermet

1998-01-01

420

Ultrafast modulation of 1.55-um QW laser structures: optically detected carrier dynamics, limiting mechanisms, and applications  

NASA Astrophysics Data System (ADS)

This paper proceeds from basic research on carrier dynamics to applications in high-speed laser devices. Different retardation mechanisms are studied experimentally and theoretically providing input for the design of high-speed laser devices. Optically detected carrier dynamics in III/V semiconductor quantum well (QW) heterostructures perpendicular to the interfaces is studied. Photoluminescence emissions originating from different semiconductor layers are recorded time-resolved to probe the carrier dynamics between these layers. High spatial and temporal resolution is obtained experimentally, partly even in the nm and sub-ps ranges, respectively. Retardation effects are separated and studied experimentally and theoretically by corresponding model calculations. A material comparison shows that GaInAsP is beneficial due to considerable advantages in technological implementation processes and AlGaInAs is superior from a physical point of view enabling higher modulation band-widths due to larger conduction band discontinuities. The equalization of the carrier densities in the individual wells is found to be mainly retarded by hole thermionic emission. Hole transport in the p-sided confinement layer and electron capture from the p-sided confinement layer is also found to be also a limiting factor. These results are used to optimized AlGaInAs/InP lasers with asymmetric confinement layers. The p-sided confinement layer is reduced on the costs of the n- sided confinement layer to obtain (1) a faster hole transport across the p-sided confinement layer and (2) to accelerate the capture of electrons from the p-sided confinement layers being uncaptured during the transfer across the QWs. In our experiments a modulation bandwidth of 26 GHz is obtained. Even higher values are found in corresponding theoretical model calculations demonstrating an interesting development potential.

Hillmer, Hartmut; Marcinkevicius, Saulius

1999-03-01

421

Characterization of candidate DIAL lidar water-vapor and carbon dioxide absorption lines in the 2-um region  

Microsoft Academic Search

DIAL lidar for water-vapor and temperature remote sensing in the eye-safe two micron region has been receiving much interest. Such systems rely on accurate spectral line characterization. Typically spectral line properties are taken from the HITRAN database. A series of transmittance measurements are made to complete and improve the HITRAN database in this important spectral region. A 3-meter base-path White

Raymond M. Sova; Michael E. Thomas; David Tobin; Daniel Byrum; L. Larrabee Strow

1995-01-01

422

Fatigue behavior in water of Y-TZP zirconia ceramics after abrasion with 30 um silica-coated alumina particles  

PubMed Central

Objective The use of a 30 µm alumina–silica coated particle sand (CoJet™ Sand, 3M Espe), has shown to enhance the adhesion of resin cements to Y-TZP. The question is whether or not sandblasting 30 µm particles does negatively affect the fatigue limit (S–N curves) and the cumulative survival of Y-TZP ceramics. Method Four zirconia materials tested were: Zeno (ZW) (Wieland), Everest ZS (KV) (KaVo), Lava white (LV) and Lava colored (LVB) (3M Espe). Fatigue testing (S–N) was performed on 66 bar of 3 mm × 5 mm × 40 mm with beveled edges for each zirconia material provided by the manufacturers. One half of the specimens were CoJet sandblasted in the middle of the tensile side on a surface of 5 mm × 6 mm. Cyclic fatigue (N = 30/group) (sinusoidal loading/unloading at 10 Hz between 10% and 100% load) was performed in 3-point-bending in a water tank. Stress levels were lowered from the initial static value (average of N = 3) until surviving 1 million cycles. Fatigue limits were determined from trend lines. Kaplan–Meier survival analysis was performed to determine the failure stress at the median percentile survival level for 1 million of cycles before and after sandblasting. The statistical analyses used the log-rank test. Characterization of the critical flaw was performed by SEM for the majority of the failed specimens. Results The fatigue limits “as received” (ctr) were: LV = 720 MPa, LVB = 600 MPa, KV = 560 MPa, ZW = 470 MPa. The fatigue limits “after CoJet sandblasting” were: LV = 840 MPa, LVB = 788 MPa, KV = 645 MPa, ZW = 540 MPa. The increase in fatigue limit after sandblasting was 15% for Zeno (ZW) and Everest (KV), 17% for Lava (LV) and 31% for Lava colored (LVB). The KM median survival stresses in MPa were: ZW(ctr) = 549 (543–555), ZW(s) = 587 (545–629), KV(ctr) = 593 (579–607), KV(s) = 676 (655–697), LVB(ctr) = 635 (578–692), LVB(s) = 809 (787–831), LV(ctr) = 743 (729–757), LV(s) = 908 (840–976). Log-rank tests were significantly different (p < 0.001) for all sandblasted groups vs. the “as received” except for Zeno (Wieland) (p = 0.295). Failures started from both intrinsic and machined flaws. Significance 30 µm particle sandblasting did significantly improve the fatigue behavior of three out of four Y-TZP ceramic materials and can therefore be recommended for adhesive cementation procedures. This study was supported in part by grants from the Swiss Society for Reconstructive Dentistry (SSRD) and 3M Espe.

Scherrer, Susanne S.; Cattani-Lorente, Maria; Vittecoq, Eric; de Mestral, Francois; Griggs, Jason A.; Wiskott, H.W. Anselm

2011-01-01

423

Tolerant low-loss three-lens coupling system for 1.48-um unstable-cavity lasers  

NASA Astrophysics Data System (ADS)

A 1.48-micrometer unstable-cavity laser is coupled into a single-mode fiber using three microlenses. Reproducible coupling of very high power is demonstrated with different types of lenses (plano-convex or bi-convex, with different apertures). Over 550 mW in single-mode fiber were reproducibly reached; to our knowledge, it is the highest power coupled into a single-mode fiber from a single semiconductor laser at this wavelength. Tolerance measurements on all of the coupling elements of a three-lens system are reported for the first time; an unexpected very large tolerance on the axial displacement of the second lens was measured. Results and interpretation with the aid of Gaussian and aberration simulations are also presented. Finally, we report on the first realization of a module with 46% chip to fiber coupling efficiency.

Boubal, Francois; Delepine, Sylvie; Salet, Paul; Gerard, Franck; Cornec, David; Di Maggio, Michel; Goix, Michel; Chardon, Jean-Pierre; Grard, Emmanuel

2000-03-01

424

Avaliação de habilidades sociais de crianças com um inventário multimídia: indicadores sociométricos associados a freqüência versus dificuldade  

Microsoft Academic Search

The field of the social competence and social skills evaluation are permeated of contradictory results, largely associated to the use, in many studies, of different indexes, informers and concepts. Given the relevance and relative scarcity of studies on that subject, in p articular about children's s elf-evaluation, the present paper aims to compare differences and similarities, in some psychometric properties

Zilda Aparecida Pereira Del Prette; Almir Del Prette

2002-01-01

425

Proposta de Informatização de um Processo de Prescrição de Atividade Física Integrado ao Prontuário Eletrônico do Paciente  

Microsoft Academic Search

Introduction: The physical activity as well as exercise, become allies in prevention of diseases, especially those of chronic degenerative character. While it is agreed that the practice of physical exercise has a beneficial role for the health of the population especially for the elderly, the health professional for lack of specific training, find great difficulty in steer and guide their

Eduardo Fernando; Cianci Gomes; Ivan Torres Pisa; Claudia Galindo; Novoa Barsottini

426

OSTEOPENIA: UM AVISO SILENCIOSO ÀS MULHERES DO SÉCULO XXI Osteopenia: a silent warning to women of the XXI Century  

Microsoft Academic Search

The lack of body culture of the population, allied to the need for knowledge by Physical Education professionals of the health area, regarding the value of physical activity in an existential perspective, has contributed, in a negative way, to the evolution of humanity. Women, in the pre-menopause phase, have suffered various consequences due to this lack of culture, constituting, thus,

Cláudio Joaquim; Borba Pinheiro; Mauro César; Gurgel de Alencar Carvalho; Estélio Henrique; Martin Dantas

427

Low temperature bonding of 30um pitch micro bump interconnection for 3D IC stacking using non-conductive adhesive  

Microsoft Academic Search

For evaluating the feasibility of adhesive bonding by NCF (non-conductive film) in micro bump joints, three types of micro joints were adopted in this study. The structure of the type I micro joints was Cu\\/Ni\\/Au while that of the type II micro joints was Cu\\/Ni\\/Au micro bump joined with Cu\\/Sn solder micro bump. Both the type I and type II

Yu-Min Lin; Chau-Jie Zhan; Yu-wei Huang; Su-Ching Chung; Chia-Wen Fan; Su-Mei Chen; Yu-Lan Lu; Tai-Hong Chen

2011-01-01

428

High resolution analysis of the ethylene-1-13C spectrum in the 8.4-14.3 um region  

SciTech Connect

Fourier transform spectra of mono-13C ethylene have been recorded in the 8.4-14.3- ?m spectral region (700 cm-1 to 1190 cm-1) using a Bruker 120 HR interferometer at a resolution of 0.0017 cm-1 allowing the extensive study of the set of resonating states {101, 81, 71,41,61}. Due to the high resolution available as well as the extended spectral range involved in this study, a much larger set of line assignments are now available. The present analysis has leads to the determination of more accurate spectroscopic constants including interaction constants than were obtained in earlier studies. In particular, the following band centers were derived: ?0(?10) = 825.40602(30) cm-1, ?0(?8) = 932.19572(15) cm-1, ?0(?7) = 937.44452(10) cm-1, ?0(?4) = 1025.6976(14) cm-1. Finally a synthetic spectrum was generated leading to the assignment of a number of 13C12CH4 lines observed through an earlier heterodyne spectroscopic study.

Flaud, Jean Marie; Lafferty, Walter J.; Sams, Robert L.; Devi, V. M.

2010-01-29

429

Diffraction properties of a 0.24-um period multilayer laminar amplitude grating in the soft x-ray region  

NASA Astrophysics Data System (ADS)

We report on the fabrication of a laminar multilayer amplitude grating, characterization in the soft x-ray region, and modeling of its properties. Holographic lithography was used to produce a 0.24-micrometers spatial period grating on a triode sputtered Mo/C multilayer mirror. The pattern was transferred into the multilayer mirror by reactive ion etching in an SF6 plasma after an intermediate lift-off step. The position and relative efficiency of the different orders of a grating etched down to the silicon substrate were measured at the Cu L(alpha (beta) ) line (1.33 nm). The results were interpreted in the framework of a scalar kinematic diffraction theory.

Berrouane, H.; Khan Malek, Chantal; Andre, Jean-Michel; Ladan, F. R.; Rivoira, Jean-Rene; Barchewitz, Robert J.

1992-02-01

430

Diffraction properties of a 0.24-um period multilayer laminar amplitude grating in the soft x-ray region  

NASA Astrophysics Data System (ADS)

We report on the fabrication of a laminar multilayer amplitude grating, characterization in the soft x-ray region, and modeling of its properties. Holographic lithography was used to produce a 0.24-micrometers spatial period grating on a triode sputtered Mo/C multilayer mirror. The pattern was transferred into the multilayer mirror by reactive ion etching in an SF6 plasma after an intermediate lift-off step. The position and relative efficiency of the different orders of a grating etched down to the silicon substrate were measured at the Cu L(alpha (beta) ) line (1.33 nm). The results were interpreted in the framework of a scalar kinematic diffraction theory.

Berrouane, H.; Khan Malek, Chantal; Andre, Jean-Michel; Ladan, F. R.; Rivoira, Jean-Rene; Barchewitz, Robert J.

1992-05-01

431

IMPLANTAÇÃO DE PROCESSOS DE APRENDIZAGEM A DISTÂNCIA NO CENTRO UNIVERSITÁRIO SALESIANO DE SÃO PAULO: UM ESTUDO DE CASO  

Microsoft Academic Search

This paper presents and discusses the experience in setting up distance learning in the undergraduate courses level at UNISAL (Centro Universitário Salesiano de São Paulo). The purpose of creating proceedings and orientations is to contribute to the establishment of an institutional culture through the Distance Learning Construction Program. It was considered that the distance learning alternative mediated by computers is

Maria L. Tarcia; Anderson Luiz Barbosa; Renato Kraide Soffner

432

Simulações Numéricas de Rotação Nuclear Cometária  

NASA Astrophysics Data System (ADS)

Este trabalho apresenta os resultados iniciais de simulações numéricas da evolução rotacional, de um núcleo cometário não esférico, ao longo de uma passagem periélica, levando-se em conta os torques devido a existência dos jatos de poeira e de gás. Inicialmente os autores apresentam um modelo simples (primeira aproximação), com somente um único jato na extremidade do semi-eixo maior, para compreender a variação positiva ou negativa que estas forças não gravitacionais exercem sobre o período de rotação cometário. Posteriormente incrementa-se o número de jatos, os quais são distribuídos ao longo da superfície cometária, para observar-se a contribuição dos efeitos provenientes dos torques originários da liberação da poeira e gás cometários, que provavelmente violará a suposição da livre precessão. Os estados rotacionais, sob torques induzidos devido à sublimação, dependem fortemente da localização das áreas ativas do núcleo. Os cometas P/Schwassmann-Wachmann 1, P/Tempel 2, P/Forbes e C/Meunier-Dupouy serão observados fotometricamente, pelos autores, no Laboratório Nacional de Astrofísica (LNA) ao longo de algumas noites consecutivas em abril, junho e julho de 1999. Estas observações serão comparadas com as simulações numéricas de rotação cometária.

Voelzke, M. R.; Winter, O. C.

1999-08-01

433

Different views over Hansen's Disease Control Program actions: the health care professionals' perspective in Brazil  

Microsoft Academic Search

RESUMO Baseado na percepção dos profissionais de saúde envolvidos nas ações de gerência e assistência do Programa de Controle da Hanseníase desenvolveu-se estudo qualitativo para construção do contexto real dessas ações. Foram incluídos profissionais de estados da região Norte e Nordeste que participaram de Oficinas de Pesquisas Operacionais realizadas em 2006. No total, 16 profissionais participaram do estudo, tendo como

Alberto Novaes Ramos Jr; Maria Vaudelice Mot; Duane Hinders; Márcia Gomide da Silva

434

DE LA REFORMA HACENDARIA AL IMPUESTO ESPECIAL SOBRE PRODUCCION Y SERVICIOS (IEPS) Y EL IMPACTO ECONÓMICO DE ACUERDO AL MODELO IS-LM: EL CASO DE MÉXICO EN EL 2010  

Microsoft Academic Search

El presente trabajo analiza a grandes rasgos, una parte de la reforma fiscal en el 2010, como una herramienta emergente para lograr el crecimiento, hoy cuando el actual sistema fiscal resulta complicado, inefectivo, -y en el que además se estima que tiene un 40 por ciento de evasión fiscal,- ha sido propuesto un nuevo sistema tributario que permite generar mayores

Oscar González Muñoz

2012-01-01

435

From Research to Community-Based Practice—Working with Latino Researchers to Translate and Diffuse a Culturally Relevant Evidence-Based Intervention: The Modelo de Intervención Psicomédica (MIP) Experience  

Microsoft Academic Search

Efforts to translate, package, and diffuse HIV\\/AIDS research into practice have gained momentum with the Centers for Disease Control and Preven- tion's (CDC's) launch of three projects: the Prevention Research Synthesis Project, which identifies evidence-based interventions studies; the Replicat- ing Effective Programs Project, which supports the translation of evidence- based interventions into materials suitable for use in local prevention programs;

Gisele Pemberton; Jonny Andía; Rafaela Robles; Charles Collins; Nelson Colón-Cartagena; Omar Pérez Del Pilar; Teresa Soto Vega

2009-01-01

436

Valoración clínica de un modelo para la depresión nerviosa de la auriculoterapia: propuesta de nuevos puntos en las áreas de Brodmann de la corteza prefrontal medial, la corteza cingulada anterior y los núcleos habenulares  

Microsoft Academic Search

BackgroundOur clinical study introduces a combination of points on the anterior side of the ear lobule together with points on the pretragal area, localized immediately under the ascending branch of the helix. Both localizations imply Brodmann-representations of the medial prefrontal cortex and habenular nuclei, respectively. In our experience, these zones will appear pain-sensitive to pressure in cases of major depression,

J. P. Fossion

2010-01-01

437

Organizando os ativos tecnológicos do governo: modelo de referência para a implantação de programas de governo eletrônico centrado no cidadão Organizing government technological assets: a reference model to implement electronic government programs targeting the citizen  

Microsoft Academic Search

This article proposes a model of e-government associated to a structuring model to support the implementation of electronic government policies. The electronic government can be understood as one of the main ways of state modernization and it is based upon the strategic and intensive use of Information and Communication Technology - ICT, used in the own government internal relationships and

Alexandre Fernandes Barbosa; Fernando Inácio de Faria; Sólon Lemos Pinto

438

Evaluación de tres modelos y factores de riesgo asociados a la mortalidad de lechones al nacimiento en el trópico de México Evaluation of three models and risk factors associated with stillborn piglets in Yucatan, Mexico  

Microsoft Academic Search

Study objectives were to analyze stillborn piglet data using three logistic regression models and to determine the effect of some risk factors on piglet mortality at birth. Data were collected from January 2003 to December 2004 on a commercial, farrow- to-finish farm in the State of Yucatan, Mexico. Response variables were: a) litters with zero or at least one stillborn

José C. Segura Correa; Alejandro Alzina-López; José Luis Solorio Rivera

439

Multivariate hierarchical model for physical inactivity among public school children Modelo hierÆrquico multivariado da inatividade fÌsica em crianÁas de escolas pœblicas  

Microsoft Academic Search

Objective: To identify biological and sociodemographic factors associated with physical inactivity in public school children. Methods: Parents of 2,519 children (49.3% of whom were girls), aged 7 to 10 years (mean = 7.6-0.9 years), from eight public schools in Sªo Paulo, Brazil, completed a self-administered questionnaire. We used multiple correspondence analysis to identify groups of responses related to levels of

Mario M. Bracco; Fernando A. B. Colugnati; Michael Pratt; A. A. C. Taddei

2006-01-01

440

DIFUSIÓN DE UN TRAZADOR EN UN ESPACIO BIDIMENSIONAL: MODELO DE DIFUSIÓN DE AGUA EN UNA MEMBRANA BIOLÓGICA TRACER DIFFUSION IN A TWO-DIMENSIONAL SPACE: MODEL OF WATER DIFFUSION IN A BIOLOGICAL MEMBRANE  

Microsoft Academic Search

In this work simulations of tracer transport through a two-dimensional space were carried on, simulating water diffusion through a biological membrane. Two models were studied: a pure fosfolipidic membrane a nd a membrane with transmembrane proteins. Every membrane was simulated by means of an o ccupation matrix in which every element represents the probability p that the corresponding place on

E. A. Perez Leale; P. M. Jacovkis; O. Chara

441

Comparison of Ionospheric Electron Density Profiles Obtained with the International Reference Ionosphere (IRI) 79 Model and Observed at Cachoeira Paulista Comparacao Entre Perfis de Densidade Eletro Nica DA Ionsfera, Obtidos Pelo Modelo IRI 79 E Observados Em Cachoeira Paulista.  

National Technical Information Service (NTIS)

An ionospheric computer model IRI 79 (International Reference Ionosphere) was implemented. With a computer program developed for the determination of of the the ionospheric profile N(h), using ionograms a comparative study between the observed and predict...

E. R. Depaula A. C. R. Desouza I. J. Kantor S. L. G. Dutra

1982-01-01

442

Modelo HACCP General para Productos Carnicos y Avicolas Perecederos, Tratados Termicamente, Cocinados Parcialmente (Generic HACCP Model for Heat Treated But Not Fully Cooked, Not Shelf Stable Meat and Poultry Products).  

National Technical Information Service (NTIS)

The Hazard Analysis Critical Control Point (HACCP) system is a scientific approach to process control. It is designed to prevent the occurrence of problems by assuring that controls are applied at any point in a food production system where hazardous or c...

1999-01-01

443

VALIDACIÓN DE UN MODELO PARA ESTIMAR LA CONDUCTANCIA ESTOMÁTICA DE HOJAS EN VIDES CV CABERNET SAUVIGNON Model validation for estimating the leaf stomatal conductance in cv Cabernet Sauvignon grapevines  

Microsoft Academic Search

The coupled model of assimilation and stomatal conductance (A-gs) was evaluated to estimate leaf stomatal conductance of a drip-irrigated vineyard (Vitis vinifera L. cv. Cabernet Sauvignon) located in the Pencahue Valley (35º22' S, 71°47' W, 150 m.a.s.l.), Maule Region, Chile, during the 2003-2004 and the 2004-2005 growing seasons. Aditionally, a calibration of the three parameters mesophyll conductance (gm), maximum specific

Francisco Jara-Rojas; Samuel Ortega-Farías; Héctor Valdés-Gómez; Carlos Poblete; Alejandro del Pozo

444

MODELO DE ATENCIÓN DOROTHEA OREM Y CAMBIOS ACTITUDINALES DEL PACIENTE PEDIÁTRICO ESCOLAR CON CRISIS ASMÁTICA EN ESSALUD Y MINSA 2006 Dorothea Orems Self Care Model and Actitudinal Change of School Pediatric Patient with Asthmatic Crisis in Essalud and Minsa 2006  

Microsoft Academic Search

Objective: To determine the influence of the application of Dorotea Orems self care model in the actitudinal changes of the school pediatric patients with asthmatic crisis in EsSALUD and MINSA 2006. Material and method: qualitative, quantitative, cuasi experimental, prospective, cross sectional study. We worked with groups already formed before the experiment. A pretest was applied to the school children of

Natalia Verán Aylas

2007-01-01

445

Modelo experimental de aneurisma sacular de artéria ilíaca comum com pericárdio bovino em suínos Experimental model of saccular aneurysm of the common iliac artery with bovine pericardium in pigs  

Microsoft Academic Search

Objective: To develop an experimental model of saccular pseudoaneurysm of the common iliac artery with bovine pericardium in pigs. Method: The animals used were two 30-kg female pigs from the Landrace specimen. The animals were submitted to general anesthesia and laparotomy with extraperitoneal access to infrarenal aorta and the iliac arteries. After systemic heparin and clamping, the iliac artery was

Luís Henrique; Gil França; Adamastor Humberto Pereira; Sílvio César Perini; Rodrigo Argenta; Celso Curcio Aveline; Roseli de Oliveira Mollerke; Marcos Eugenio Soares; Fernanda Nóbrega; Márcio Poletto Ferreira

446

Reflectancia Espectral Do Trigo Irrigado (Triticum Aestivum, L) Por Espectrorradiometria de Campo E Aplicacao Do Modelo Sail (Field Spectroradiometry and Sail Model Application to Irrigated Wheat (Triticum Aestivum, L) Canopies Spectral Reflectance).  

National Technical Information Service (NTIS)

Experimental data and results of SAIL model supported a study relating the spectral reflectance of wheat canopies (Triticum aestivum, L.) to their biophysical parameters which included an evaluation of the model potential for investigating such relationsh...

M. Demorissonvaleriano

1992-01-01

447

Sistema de Tabulaci on de Coecientes Binomiales o Tri angulo de Pascal: un Modelo Num erico Rasga el Telar de los Tiempos Binomial Coecients' Tabulation System or Pascal's Triangle: a Numeric Model Rips the Loom of Time  

Microsoft Academic Search

One of the most famous numeric models of the History of Mathematics, Pascal's triangle, shows us its origin and shuttling throug the loom of time, since its oriental creation, almost magi- cal and forgotten, until becoming rooted in the occidental world.

Mara Cristina; Solaeche Galera

448

CARACTERIZACIÓN CLIMÁTICA, METEOROLÓGICA E HIDROLÓGICA DE LA CUENCA BINACIONAL CATAMAYO-CHIRA PREVIO A LA IMPLEMENTACIÓN DE LOS MODELOS SWAT Y WATEM\\/SEDEM CON FINES DE SU PLANIFICACIÓN TERRITORIAL  

Microsoft Academic Search

The present work informs about a quality analysis of climatic, meteorological and hydrological records taken daily and monthly in 24 Ecuadorian and 19 Peruvian stations distributed in the bi-national basin Catamayo- Chira. A homogenization of records using statistical proceedings was carried out, and there were obtained 15 parameters at monthly level in order to climatically characterize the studied area and

Fernando Oñate-Valdivieso; Edwin Duque; Patricio León; Felipe Duque; Walter Rojas; Fernando Tenesaca

449

Flutuações da temperatura eletrônica em NGC 2438 e NGC 2440  

NASA Astrophysics Data System (ADS)

Tradicionalmente, as abundâncias em nebulosas planetárias e regiões HII têm sido obtidas de linhas excitadas colisionalmente, as quais são fortemente dependentes da temperatura eletrônica. Alternativamente, as abundâncias químicas podem ser determinadas de linhas de recombinação, as quais são quase independententes da temperatura eletrônica. Entretanto, consideráveis diferenças têm sido encontradas entre estes dois métodos. Estas discrepâncias têm sido atribuídas às flutuações espaciais da temperatura eletrônica. Entretanto, as magnitudes necessárias de flutuações de temperatura eletrônica são consideravelmente mais altas do que aquelas preditas pelos modelos padrões de fotoionização e os mecânismos físicos que poderiam explicar as grandes flutuações de temperatura são desconhecidas. Desta forma, o estudo de variações da temperatura eletrônica em regiões HII e nebulosas planetárias tem ganho um renovado interesse. Neste trabalho apresentamos os resultados preliminares de um estudo observacional sobre variações internas da temperatura eletrônica nas nebulosas planetárias NGC 2440 e NGC 2438. Analisamos dados espectrofotométricos de fenda longa, com alta razão sinal-ruído, na faixa de 3300-6800 Å, com o espectrógrafo Cassegrain Boller & Chivens acoplado ao telescópio de 1.52 m do European Southern Observatory (ESO). Temperaturas eletrônicas foram derivadas da razão [OIII](l4959+l5007)/l4363 em diferentes posições em cada nebulosa planetária. Flutuações da temperatura eletrônica foram detectadas e suas magnitudes foram estimadas em NGC 2440 e NGC 2438.

Krabbe, A. C.; Copetti, M. V. F.

2003-08-01

450

Uma comparação entre técnicas de propagação de erros em astrofísica: Monte Carlo x Bootstrap  

NASA Astrophysics Data System (ADS)

Recentemente Dhillon & Watson (2001) criticaram o procedimento de determinação de erros via simulações de Monte Carlo no caso do imageamento indireto de estrelas, por introduzir ruído nos dados e resultar em erros superestimados. Estes autores propuseram a utilização alternativa do método de Bootstrap como uma técnica superior para a estimativa de erros. Neste trabalho apresentamos os resultados de um estudo comparativo da performance das técnicas de simulação por Monte Carlo e por Bootstrap para a determinação de erros em duas situações de interesse: (i) ajuste de modelos a espectros observados e (ii) imageamento indireto de discos de acréscimo com técnicas de mapeamento por eclipse. No caso (i), os dados de entrada são espectros de emissão simples de hidrogênio aos quais é adicionado ruído gaussiano de amplitude selecionada. No caso (ii), são produzidas curvas de luz do eclipse de uma distribuição de brilho seguindo a lei TµR-3/4 para discos estacionários cuja taxa de acréscimo varia ao longo do eclipse segundo uma distribuição gaussiana de amplitude selecionada, simulando o ruído. A avaliação da performance é feita com o auxílio de um diagrama do erro relativo na grandeza ajustada, conforme obtido por cada método, versus o erro relativo (ruído/sinal) dos dados de entrada. O estudo mostra que as duas técnicas produzem resultados semelhantes nos dois casos, e que a suposta superioridade do método de Bootstrap não se confirma.

Waelkens, A. H.; Janot Pacheco, E.

2003-08-01

451

Observações das explosões cósmicas de raios gama GRB021004 e GRB021211 com o satélite HETE  

NASA Astrophysics Data System (ADS)

O High Energy Transient Explorer (HETE) é o primeiro satélite inteiramente dedicado ao estudo das explosões cósmicas de raios gama (ECRGs). Lançado em 9 de outubro de 2000, o HETE possui instrumentação capaz de observar as ECRGs desde o UV até raios gama e localizá-las com precisão de ~ 1-10 minutos de arco. As localizações das ECRGs detectadas são disseminadas rapidamente (em alguns segundos) pela Internet através de uma rede de estações de recepção ao longo do equador. A participação brasileira nesse projeto se dá através da montagem e operação de uma estação de recepção em Natal, RN, e da participação na equipe científica da missão. Neste trabalho são apresentados resultados da observação pelo HETE de duas ECRGs: GRB 021004 e GRB 021211. A GRB021004 foi detectada em raios gama pelo HETE em 4 de outubro de 2002 e localizada em raios-X em apenas 48 s, quando a emissão de raios gama ainda estava se processando. A explosão, relativamente brilhante e longa, durou aproximadamente 100 s. Um transiente óptico de magnitude 15 foi detectado no local da explosão nove minutos após o evento, e observações realizadas após 7 horas determinaram um desvio para o vermelho de absorção de 1,6. O GRB021004 foi o burst mais bem observado até o momento e suas observações em vários comprimentos de onda têm sido fundamentais para o aprimoramento dos modelos de ECRGs. O GRB21211, um burst brilhante e rico em raios-X, foi detectado em 11 de dezembro de 2002 e localizado em raios-X em 22 s após o início do evento. A duração do burst foi de 2,3 s em altas energias (85 a 400 keV) e de 8,5 s em baixas energias (2 a 10 keV). Caso essa explosão não tivesse sido rapidamente localizada pelo HETE, ela teria sido classificada como "opticamente escura", já que o transiente óptico decaiu rapidamente de R < 14 a R»19 dentro dos primeiros 20 minutos e já estava mais fraco do que R»23 depois de 24 horas da ocorrência do burst. Serão discutidas as implicações desse resultado nos modelos de afterglows de ECRGs.

Braga, J.; Ricker, G.; Hurley, K.; Lamb, D.; Grew, G.; et al.

2003-08-01

452

Evolução temporal de discos circunstelares em estrelas Be  

NASA Astrophysics Data System (ADS)

A pesquisa do mecanismo que leva uma estrela do tipo Be a perder massa e formar um envelope circunstelar, nomeado como fenômeno Be, é uma questão em aberto, intrigante, e que adquire contornos interessantes em face às informações espectroscópicas de alta resolução. Nesta última década, consolida-se a idéia de que a forma destes envelopes é de tipo discóide, obedecendo a uma lei Kepleriana de velocidades, e mais ainda, recentemente há evidências de que a distribuição de matéria nestes discos pode assumir um caráter de anel. Medidas de algumas dimensões de discos circunstelares puderam ser obtidas pela análise de espectros de alta resolução e alta relação sinal-ruído para as estrelas Be: alpha Eri (HD 10144, B3Vpe), omicron And (HD 217675, B6IIIpe), e eta Cen (HD el972, B1.5Vne), no período dos anos de 1991 a 2001. Alguns modelos clássicos de envelope predizem uma distribuição de massa que decresce suavemente a partir da superfície estelar. Entretanto, considerando que a separação de picos de emissão em perfis de linhas do HeI e H-alpha, alargados por efeitos cinemáticos, é função do raio estelar e da velocidade rotacional projetada (vsini); nossos resultados sugerem a presença de um anel de matéria circunstelar, que aparece logo após a ejeção do material fotosférico, imediatamente acima da superfície estelar, e que se expande para raios maiores ao longo do tempo, eventualmente desconectando-se da superfície por uma região de densidade de matéria mínima. Tais interpretações revivem a idéia de que anéis de matéria circunstelar podem ser os responsáveis por algumas variabilidades em perfis de linhas de emissão, como as variações V/R.

Fernandes, M. V. M.; Leister, N. V.; Levenhagen, R. S.

2003-08-01

453

Laser tissue melding: use of 1.32-um computerized Nd:YAG laser, results of leak/burst strength studies in microsurgical procedures  

NASA Astrophysics Data System (ADS)

The ProClosureTM System (PCS) consists of a low power 1.32micrometers Nd:YAG laser coupled to a handheld disposable fiber optic device. The system has been designed to perform a wide range of tissue welding applications such as cosmetic skin closure,vascular surgery, and minimally invasive surgical procedures normally performed with sutures and staples. Utilizing a wavelength for tissue fusion that is least distracted by medium in the surgical field coupled with a computerized delivery system allows for a more precise application (+/- 5%) of laser energy to the tissue. The study design involved the micro-surgical anastomosis of twenty Sprague-Dawley rats (vas deferens) and twenty-one Sprague-Dawley rats (femoral arteries). Each rat is its own contralateral control. Laser repair time is approximately one-third that of conventional suturing. Postoperative dissection and burst strength testing was conducted at day 0, 1, 7, and 14. At each postoperative interval, the mean leak/burst strength for laser-assisted closure v. control, was markedly higher. The precise application of energy fluence resulting from ProClosure's computerized system yields an initial strength and a fluid static seal that is superior to conventional suture closure.

Anderson, Dallas W.; Hsu, Tung M.; Halpern, Steven J.; Honaker, Arnold

1993-07-01

454

ANÁLISE DOS INDICADORES DE HEMORRAGIA LETAL EM VÍTIMAS DE TRAUMA PENETRANTE DE TRONCO ADMITIDAS EM CHOQUE: UM MÉTODO OBJETIVO PARA SELECIONAR OS CANDIDATOS AO \\  

Microsoft Academic Search

RESUMO: Objetivo: Identificar os indicadores de hemorragia letal em vítimas de trauma penetrante de tronco, admitidas com hipotensão arterial sistêmica e analisar sua aplicabilidade na seleção dos candidatos ao \\

José Gustavo Parreira

455

Integrated IMP Ti and MOCVD TiN for 300-mm W barrier and liner for sub-0.18-um IC processing  

Microsoft Academic Search

The combination of IMP Ti and CVD TiN is well established for use as W-adhesion films for 200 mm wafers. The advantage of this unique PVD\\/CVD integrated solution provides the superior Ti bottom coverage by IMP Ti and conformal TiN coverage from MOCVD TiN. A 300 mm liner and barrier system with integrated IMP Ti, MOCVD TiN has also been

Anish Tolia; Marlon Menezes; Jason Li; Michael Jackson; Vikram Pavate; Nitin Khurana; Rod Mosely; Murali K. Narasimhan; Mei Chang; Fusen E. Chen

1999-01-01

456

Investigation of pulsed 1.44 um Nd:YAG laser in nasal and sinus surgery: in vitro and in vivo animal study  

NASA Astrophysics Data System (ADS)

The Nd:YAG laser 1.44 micrometers wavelength is a relatively new wavelength with water absorption coefficient higher even than 1.06 micrometers , permitting the creation of a more precise lesion with less damage to surrounding tissue. Very little, however, is known about its effects in live experimental model. The non-contact 1.44 micrometers Nd:YAG laser was used in four animals (dogs) to perform a resection of middle turbinate and to create a 1 cm lesion on the septal mucosa and inferior turbinate in the left side through a sinuscope. The same procedure was performed on the opposite side using microsurgical forceps as a control. The animals were followed-up, examined endoscopically, and sacrificed after 48 hours (1 animal), 1 month (1 animal) and 2 months (2 animals). Moderate-to-severe bleeding was commonly encountered on the control side, which obscured vision, and required packing in 2 dogs. In contrast, the laser had a satisfactory hemostatic result with easy control for endoscopic resection. Normal healing was observed under gross and by histologic examination 48 hours and 1 month after the surgery and healing was complete by 2 months. There was more scaring and adhesions produced by the forceps on the control side. Histologically, tissue thermal damage produced by the laser was superficial and confined to the lesion. The epithelial regeneration has been nearly completed in 1 month, with normal mucosa coverage in 2 months after the surgery. This study suggests that the 1.44 micrometers wavelength of the Nd:YAG should be considered as safe and reliable for intranasal application.

Rebeiz, Elie E.; Wang, Zhi; Pankratov, Michail M.; Perrault, Donald F.; Shapshay, Stanley M.

1995-05-01

457

Triple-level metal process for high-performance and high-density 0.6-um\\/5-V application-specific integrated circuits  

Microsoft Academic Search

In this paper a triple level metal interconnect process for a commercially available high density, high performance 0.6 micrometers \\/5V CMOS technology is described. Poly gates of 0.6 micrometers (Leff equals 0.45 micrometers ) were fabricated and then planarized by BPSG reflow and resist etch back. Blanket W and etch back were used to fill high aspect ratio contacts and

Sharad Prasad; M. Bruner; Fusen E. Chen; Mitan Gandhi; Y. C. Lu; Chiyi Y. Kao; Steve Yang; William Hata

1993-01-01

458

In Situ Measurements of H 2 O From a Stratospheric Balloon by Diode Laser Direct-Differential Absorption Spectroscopy at 1.39 um  

Microsoft Academic Search

A distributed-feedback InGaAs laser diode emitting near 1.393 m is used in conjunction with an optical multipass cell that is open to the atmosphere to yield ambient water-vapor measurements by infrared absorption spectroscopy. To obtain the high dynamic range for the measurements that is required for continuous water-vapor monitoring in the upper troposphere and the lower stratosphere, we used a

Georges Durry; Gerard Megie

2000-01-01

459

In Situ Measurements of H 2 O From a Stratospheric Balloon by Diode Laser Direct-Differential Absorption Spectroscopy at 1.39 um  

NASA Astrophysics Data System (ADS)

A distributed-feedback InGaAs laser diode emitting near 1.393 m is used in conjunction with an optical multipass cell that is open to the atmosphere to yield ambient water-vapor measurements by infrared absorption spectroscopy. To obtain the high dynamic range for the measurements that is required for continuous water-vapor monitoring in the upper troposphere and the lower stratosphere, we used a simple circuit that combined differential and direct detection. Furthermore, the laser emission wavelength was tuned to balance the steep decrease in H2 O concentration with altitude by sweeping molecular transitions of stronger line strengths. The technique was implemented by use of the Spectrom tre Diodes Laser Accordables (SDLA), a tunable diode laser spectrometer operated from a stratospheric balloon. Absorption spectra of H2 O in the 5 -30-km altitude range obtained at 1-s intervals during recent balloon flights are reported. Water-vapor mixing ratios were retrieved from the absorption spectra by a fit to the full molecular line shape in conjunction with in situ pressure and temperature measurements, with a precision error ranging from 5% to 10%.

Durry, Georges; Megie, Gerard

2000-10-01

460

Preferência musical, atitudes e comportamentos anti-sociais entre estudantes adolescentes: um estudo correlacional1 Music preference, attitudes and antisocial behaviors among adolescent students: a correlational study  

Microsoft Academic Search

As there are not many studies about musical preferences as an antisocial behavior understanding method , this study aimed to raise possible relation among this construct and deviant behaviors, considering also the attitudes toward marijuana use. This sample was composed by 548 high school students from public (46.4%) and private (53.6%) schools, most of them female (54.9%). They had answered

Carlos Eduardo PIMENTEL; Valdiney Veloso GOUVEIA; Tatiana Cristina VASCONCELOS

461

Gastrópodes e outros invertebrados do sedimento e associados à macrófita Eichhornia crassipes de um açude hipertrófico do semi-árido paraibano  

Microsoft Academic Search

realizadas coletas bimestrais do sedimento (draga Van Veen, 400cm 2 ) e da planta (puçá com malha de 500µm), no período de julho\\/1998 a novembro\\/1999 e concomitantemente foram medidas as variáveis ambientais. Os gastrópodes destacam-se pela ocorrência e dominância, sendo registradas sete espécies pertencentes a seis famílias distintas. Melanoides tuberculata foi a espécie dominante em ambos os substratos (sedimento e

Francisco José Pegado Abílio; Romualdo Lunguinho Leite; Thiago Leite de Melo Ruffo

462

Moralidade e Homicídio: Um Estudo sobre a Motivação do Transgressor Morality and Homicide: A Study on the Motivation of the Transgressor  

Microsoft Academic Search

Resumo Investigamos os juízos de representação da realidade (JRR) e de valor moral (JVM) de 20 homens homicidas (30 a 49 anos), acerca da razão do crime, à época do homicídio e no momento atual. Realizamos entrevistas individuais e verificamos que: o JRR mais apontado, no presente e no passado, foi a agressão física sofrida, justificada no presente principalmente pelo

Luciana Souza Borges; Heloisa Moulin de Alencar

463

High-Efficiency On-Line Solid-Phase Extraction Coupling to 15-150 um I.D. Column Liquid Chromatography for Proteomic Analysis  

SciTech Connect

Flexible manipulation of various properties of proteomic samples is important for proteomic analyses, but it has been little explored for newly developed approaches based on liquid chromatography (LC) in combination with mass spectrometry (MS). With miniaturization of the LC column inner diameter dimensions (required for improving the analysis sensitivity), this issue becomes more challenging due to the small flow rates and the increasing effects of extra column volume on the separation quality and its use for resolving complex proteomic mixtures. In this study, we used commercial switching valves (150-mm channels) to implement the on-line coupling of capillary LC columns with relatively large solid phase extraction (SPE) columns operated at 10,000 psi. With optimized column connections, switching modes, and SPE column dimensions, high-efficiency on-line SPE-capillary and nanoscale LC separations were obtained with peak capacities of~1000 for capillaries having inner diameters between 15 to 150 mm. The on-line coupled SPE columns increased the sample processing capabilities by~400-fold for sample solution volume and~10-fold for sample mass. The proteomic applications of this on-line SPE-capillary LC system were evaluated for analysis of both soluble and membrane protein tryptic digests. Used with an ion trap tandem MS we could typically identify 1100-1500 peptides for analyses in a single 5-hour run. Peptides extracted on the SPE column and eluted from the LC column covered a hydrophilicity/hydrophobicity range that include an estimated~98% of all the tryptic peptides. The present implementation also facilitates automation and enables use of both disposable SPE columns and electrospray emitters, providing a robust basis for routine proteomic analyses.

Shen, Yufeng (BATTELLE (PACIFIC NW LAB)); Moore, Ronald J. (BATTELLE (PACIFIC NW LAB)); Zhao, Rui (BATTELLE (PACIFIC NW LAB)); Blonder, Josip (BATTELLE (PACIFIC NW LAB)); Auberry, Deanna L. (BATTELLE (PACIFIC NW LAB)); Masselon, Christophe D. (BATTELLE (PACIFIC NW LAB)); Pasa Tolic, Ljiljana (BATTELLE (PACIFIC NW LAB)); Hixson, Kim K. (BATTELLE (PACIFIC NW LAB)); Auberry, Kenneth J. (BATTELLE (PACIFIC NW LAB)); Smith, Richard D. (BATTELLE (PACIFIC NW LAB))

2003-07-15

464

Construcao de um girotron de 35 GHz e de 100 kW. (Construction of a 35 GHz 100 kW gyrotron).  

National Technical Information Service (NTIS)

In this work a description of a 35 GHz 100 kW gyrocon is described which is under construction at the National Space Research Institute Plasma Laboratory. Project conceptual aspects are emphasized, specifically high current density thermionic cathodes, hi...

Y. Aso J. J. Barroso P. J. Castro R. A. Correa G. O. Ludwing

1989-01-01

465

Um Estudo das Funcoes de Similaridade DA Camada Limite Planetaria. Parte 2: Resultados (Study of the Functions of Similarity of the Planetary Boundary Layer. Part 2. Results).  

National Technical Information Service (NTIS)

Micrometeorological data obtained during atmospheric boundary layer testing over tropical savannah land in Koorin, Australia are used to evaluate similarity functions A, B, and C of the planetary boundary layer. Different flux-profile relationships are ev...

J. C. S. Chagas Y. Viswanadham

1984-01-01

466

Um Estudo das Funcoes de Similaridade DA Camada Limite Planetaria. Parte 1: Teoria (Study of the Functions of Similarity of the Planetary Boundary Layer. Part 1. Theory).  

National Technical Information Service (NTIS)

The concept of asymptotic similarity is extended to the planetary boundary layer. Similarity functions A, B, and C of the planetary boundary layer are discussed using Rossby-number similarity theory. Simplified theoretical expressions of functions A, B, a...

Y. Viswanadham J. C. S. Chagas

1984-01-01

467

Diferenças sexuais no desenvolvimento da preocupação moral por outras pessoas: um estudo empírico da expressão de emoções morais em crianças1  

Microsoft Academic Search

This study investigated gender and age differences in children's feelings of guilt and personal responsibility towards other people's distress. Forty-eight children, aged between seven and eleven years, were randomly recruited from a state school in Kent, England. Children were presented with sets of cartoon stories depicting a variety of open-ended moral dilemmas. They were then asked to recount the story

Heliane de Almeida; Lins Leitão

468

O processo de mudança em um hospital de Belo Horizonte: a visão da enfermeira-gerente  

Microsoft Academic Search

Aiming at analizing manager-nurses’ perceptions and wits as to processes of structural and managerial changes in a hospital organization this work was written. It is a case study- qualitative approach- carried out in a extra-sized charity hospital in Belo Horizonte. Data were collected through semi-structured interviews with 10 manager-nurses, submitted to analisis of content. According to the results obtained it

Maria Jose Menezes Brito; Marilia Alves

2003-01-01

469

Application of top-down CD-SEM metrology in measuring wafers with resist film thickness of 24 um with various sidewall profiles  

NASA Astrophysics Data System (ADS)

An automated top-down CD-SEM technique, complimenting the existing high angle tilt SEM method has been developed for measuring features printed at a film thickness of 24 microns. Measurements of resist linewidth versus exposure dose were made using a KLA 8100 top-down CD-SEM. The advantage of this CD-SEM is the automated collection of a large statistical pool of data and the ability to determine the linewidth independently of operator, accurately and consistently. The technique has been applied to AZ P4000 and AZ 9000 photoresist thick films through and beyond their exposure latitude. Maintaining a sharp sidewall profile of photoresist while supporting high aspect ratios is ideal for magneto-resistive and inductive thin film recording head coil plating and many other mission-critical applications. Also a fast and non-destructive thin film recording head coil plating and many other mission-critical applications. Also a fast and non-destructive metrology technique is desired and preferred to support future more costly and larger substrates. Results are reported for 10 and 6 micron reticle linesizes, respectively, at a film thickness of 24 microns using the AZ P4620 and AZ 9262 positive photoresist over bare silicon wafers. Wafers were exposed using an Ultratech Ultrastep Stepper model 1500 system and then developed by AZ 400 K inorganic developer. Exposure dose- array fields were measured first on the top-down KLA CD-SEM and then coated and re-measured on a Hitachi scanning electron microscope with 60 degrees-tilt capability. The importance of knowledge of resist profile and choosing the proper metrology tool is discussed. Linewidth values were compared with result from the standard tilt microscope reading method. Agreement to within 10 percent is noted for profiles corresponding to most exposure doses. Profiles for higher, over-exposed fields resemble a 'coke bottle' and linewidth for bottom of resist is inferred by extrapolation based on the prior correlation found between the two SEMs. The AZ 9262 resist line features showed a smaller 'coke bottle' profile at higher doses than AZ P4620 line features. Further work is planned for other positive resists with non- traditional profiles on unconventional substrates.

Dixit, Sunit S.; Liu, Ying; Azordegan, Amir R.

1999-06-01

470

Evaluation of Anisotropic, Ionogenic Membranes (Diaflo(Trademark) UM-Series) for Selective Removal of Divalent Cations and Anions from Brackish Water by Reverse Osmosis.  

National Technical Information Service (NTIS)

A series of asymmetric membranes made from a polyelectrolyte complex resin has been evaluated by reverse osmosis tests for the selective removal of divalent ions from brackish waters. Three different types of membranes were studied. All three membranes we...

H. Shathmann R. A. Cross T. R. Rich B. E. Carroll

1973-01-01

471

Confusion about a little observatory: the history of the first high school observatory (German Title: Verwirrung um eine kleine Sternwarte: Die Geschichte der ersten Chemnitzer Schulsternwarte )  

NASA Astrophysics Data System (ADS)

By means of a small watercolor, painted by a musicologist, the existence of the highschool observatory of Chemnitz was rediscovered. The small observatory was build in 1893 by means of funds and a donation: after WW I it was also used for popular education. During Nazi times, the observatory fell into neglect, and the mechanical damage made it impossible to put it back into operation after WW II The building was torn down in 1964 and forgotten.

Pfitzner, Elvira

472

Rompendo o silêncio e suas barreiras: um inquérito domiciliar sobre a violência doméstica contra idosos em área de abrangência do Programa Médico de Família de Niterói  

Microsoft Academic Search

The objective of this paper was to study the prev- alence of domestic physical violence against the elderly in an area covered by the Family Health Program in Niterói, Rio de Janeiro State, Brazil. Using a household survey, 322 subjects 60 years or older were randomly selected from the cen- sus of seniors assigned to six health teams. Vio- lence

Claudia Leite de Moraes; Paulo Cavalcante Apratto Júnior; Michael Eduardo Reichenheim

473

Detecao, Aquisicao e Demodulacao de Sinais em um Sistema de Comunicacao Comacesso Aleatorio (Detection, Acquisition and Signal Demodulation in a Communication System with Random Access).  

National Technical Information Service (NTIS)

The development of a signal processor for the Data Collecting System of the first Brazilian Complete Space Mission is presented. The signals from the data collecting platforms are random both in time and frequency, and are spread over a band of 24 kHz. Th...

L. C. Pacolasobrinho

1988-01-01

474

Thulium:YAG VapoEnucleation of the prostate in large glands: a prospective comparison using 70- and 120-W 2-um lasers  

PubMed Central

This study compared the efficacy of 70- and 120-w 2-µm thulium:YAG VapoEnucleation of the prostate (ThuVEP) for patients with benign prostatic obstruction (BPO). A prospective analysis of 84 patients with symptomatic BPO and prostatic enlargement (?60 ml) who underwent either 70-w (n=44) or 120-w ThuVEP (n=40) non-randomly was carried out. Patient demographics and perioperative and 12-month follow-up data were analysed. The mean prostate volume was 79.90±27.49 ml in patients who had received 70-w ThuVEP, which was less than in those who had received 120-w ThuVEP (88.53±25.10; P=0.033). The mean enucleation (resected weight/laser time, 2.16±1.21 g min?1 vs. 1.23±0.60 g min?1; P=0.013), operation efficiency (resected weight/total operation time, 0.76±0.35 g min?1 vs. 0.42±0.27 g min?1; P=0.000) and percentage of resected tissue (66.93%±22.79% vs. 45.41%±23.33% P=0.000) were higher with 120-w treatment compared to 70-w ThuVEP. One patient (1.2% of total patients) (in the 120-w group) required a blood transfusion postoperatively. Sixty-one patients (73%) were available for review at the 12-month follow-up time point. The quality of life (QoL), International Prostate Symptom Score (IPSS), maximum urinary flow rate (Qmax), postvoiding residual urine (PVR) and prostate volume improved significantly after treatment (P?0.035) and were not significantly different between those treated with the different devices (70- and 120-w). The median prostate volume reduction was 81.70% and 82.19% with 70- and 120-w ThuVEP, respectively. The incidence of complications was low and did not differ between groups treated with the different devices. Two patients (2.4%) (one per group) had a bladder neck contracture at the follow-up. ThuVEP is a safe and efficacious procedure for the treatment of symptomatic BPO. The incidence of complications was low with both devices. The 120-w thulium:YAG device enhances the effectiveness of ThuVEP with regard to the percentage of resected tissue and the enucleation/operation efficiency.

Netsch, Christopher; Bach, Thorsten; Herrmann, Thomas RW; Gross, Andreas J

2012-01-01

475

Suicidal ideation among students enrolled in healthcare training programs: a cross-sectional study Ideação suicida entre estudantes da área da saúde: um estudo transversal  

Microsoft Academic Search

Objective: We aimed to assess the presence of suicidal ideation, depressive symptoms and symptoms of hopelessness in three healthcare training programs. Method: The study's population comprised all students enrolled at the Medical School of the Fundação do ABC, Brazil, from 2006 to 2007 compared to students enrolled in nursing and pharmacy programs. We applied the Beck Scale for Suicidal Ideation,

Clóvis Alexandrino-Silva; Maira Lazarini; Guimarães Pereira; Carlos Bustamante; André Corrêa; Toledo Ferraz; Sergio Baldassin; Arthur Guerra de Andrade; Tânia Corrêa de Toledo; Ferraz Alves

2009-01-01

476

A EVASÃO DOS ALUNOS DAS ACADEMIAS: UM ESTUDO DE CASO NO CENTRO INTEGRADO DE ESTÉTICA E ATIVIDADE FÍSICA - CIEAF, NA CIDADE DE CAICÓ-RN  

Microsoft Academic Search

The physical activity is a form to more improve each time the quality of life of the people, then the gym is synonymous of guided physical activity, serching to after for its practioners a service where at can, in the possible measure do, to take care of its expectations, and this study it had the objective to discover the reasons

Cristina Lúcia; Fernandes A. Albuquerque

477

3-12-um images of HD44179 and M42: spectral differencing as a mid-infrared astronomical image enhancement technique  

NASA Astrophysics Data System (ADS)

NASA Ames Research Center and Lick Observatory have jointly developed two prototype infrared camera for astronomical imaging. The new cameras have been built using Amber Engineering Inc. 128 X 128 SiGa and InSb focal plane arrays. We report observations of the BN-KL source complex in M42 and HD44179 which are used as a demonstration of the cameras' performance when used as narrow band spectral images. The images have a dynamic range in excess of 10(superscript 3). The high signal to noise ratio and linearity of the images are used to demonstrate the power of spectral differencing as a tool for astronomical image enhancement at mid infrared wavelengths. The observations were made over a range of wavelengths 3.1 - 3.3 micrometers and 8.4 - 11.5 microns in and out of the silicate absorption band, and in the PAH emission bands at 3.3 micrometers and 11.3 micrometers using approximately 2% spectral resolution. Bell and Crisp, 1991, have reported spatial resolution enhancement of images for the surface of Mars by division of multispectral images in and out of the H(subscript 2)O absorption feature at 3 micrometers . We find that a similar image processing technique using normalized image differencing can be used in the 10 micrometers silicate absorption feature and PAH emission bands to improve the contrast in mid-infrared astronomical images. This technique is expected to be applicable to imaging of galactic nuclei and other astronomical objects as well as embedded stellar infrared sources.

Rank, David M.; Temi, Pasquale; Bregman, Jesse D.

1993-10-01

478

Acid-breakable-resin-based chemical amplification positive resist for 0.1-um-rule reticle fabrication: design and lithographic performance  

NASA Astrophysics Data System (ADS)

We have designed a new chemical amplification (CA) positive resist for 0.1micrometers reticle fabrication. This positive resist consists of an acid-generator, an acid-diffusion controller, and an acid-breakable (AB) resin that can be converted to initial polyphenol units by an acid-catalyzed reaction. In the exposed region, main-chain scission of the AB resin matrix produces nearly mono-dispersed fragments (the polyphenol). This complete fragmentation results in an extremely high dissolution rate with an aqueous-base developer (tetramethylammonium hydroxide: 2.38 wt%). The AB resin-based resist enabled fabrication of scum free 0.15micrometers line-and-space patterns on a CrOx plate by using a 50-kV electron-beam reticle writer (HL series). The line- edge roughness of patterns delineated by this resist (<10 nm) was less than half that for previously developed novolak-resin-based CA resists (RE series:>30nm).

Migitaka, Sonoko; Arai, Tadashi; Sakamizu, Toshio; Kasuya, Kei; Hashimoto, Michiaki; Shiraishi, Hiroshi

2001-09-01

479

1.2-um GaInAs\\/GaAs lasers: are they useful for high-capacity single-mode fiber datacom?  

Microsoft Academic Search

Gigabit\\/s-LANs with 0.85 micrometers vertical cavity surface emitting lasers (VCSELs) are now going into the market. But, their link length is limited to be shorter than 500 m due to modal dispersion of employed multi-mode fibers and various modal problems should be considered in system design. The next step will be to develop long wavelength VCSELs matching to a single

Fumio Koyama; Dieter Schlenker; Tomoyuki Miyamoto; Zibiao Chen; Kenichi Iga

1999-01-01

480

Clinical application of a new 0.63- to 0.65-um pulse diode laser in treating ear, throat, and nose diseases in adults and children  

NASA Astrophysics Data System (ADS)

An investigation was made of applying a pulsed diode laser emitting at the wavelengths of 0.63 to 0.65 micrometers to treat various otolaryngological diseases, such as rhinosinusitis, acute rhinitis, vasomotor rhinitis, allergic rhinitis, the illness of the lymphoid ring, adenoiditis, chronic tonsillitis, pharyngitis, and catarrhal and suppurative otitis. The therapeutic effect produced by the pulsed diode laser was compared with that of conventional therapeutic lasers. It was found that the pulsed low-intensity laser radiation in the red spectrum region offered a number of advantages over conventional laser therapeutic techniques.

Nasedkin, Alexy N.; Pletnev, A. S.

2001-04-01

481

Reticle inspection system using DUV wavelength and new alogorithm platform for advanced reticle inspection for 0.13-um technology node  

NASA Astrophysics Data System (ADS)

KLA-Tencor has developed a fourth-generation reticle inspection system, the KLA-Tencor 570, using DUV imaging to detect 100-nm defects on advanced OPC and PSM reticles for the 0.13 micron technology node production and 0.10 micron technology development. This system contains innovations in optics, electronics, mechanics, algorithms, and software. The DUV wavelength of the optical system improves the resolution and thus the minimum linewidth capability. A low- noise optical system generates high-quality images to improve productivity, facilitate defect classification, and reduce operator errors. The United Inspection Computer (UIC), a high-speed scalable computational engine, renders database data to create an image of the mask for die-to- database inspections. The UIC uses the new Ultra-Performance Algorithm, which provides high detection sensitivity at high speed for D:D and D:DB inspections. UPA can handle complex structures such as advanced OPC and phase shift mask. TI places no fundamental requirement on the size of OPC features. UPA classified defects automatically. The operator can select sensitivity settings independently for each defect type. Since UPA measures the CD of every feature on the reticle, it can also make total plate quality measurements for statistical process control of mask manufacturing. A new reticle handling system reduces overhead time and allows easy loading and unloading of the reticle. This system manipulates 6-inch and 230-mm reticles with and without pellicles. A flexible adapter design allows the system to mix different reticle sizes. A new data preparation system executes on a multi-processor computer with a 64-bit operating system to minimize data preparation time. This DPS architecture allows the operator to change various inspection parameters such as pixel size, alignment points, DNIR's and rotation without the need for re-prep, thereby improving productivity and flexibility. The KLA- Tencor 570 also allows optional remote Data Prep. Test results indicate that the KLA-Tencor 570 already meets its sensitivity specifications on a Verimask VT 690 in both die- to-die and die-to-database modes.

Alles, David; Ter Beek, Paul; Juang, ShauhTeh; Wiley, James N.; Hsia, Kangmin

2000-07-01

482

Energia solar fotovoltaica: Contributo para um roadmapping do seu desenvolvimento tecnológico [Fotovoltaic solar energy: a contribute to a technological development roadmapping  

Microsoft Academic Search

The main goal for this report is to alert for the need of a continuous investment in policies that should be developed worldwide, with respect to research and development (R&D), at all levels, in photovoltaic energy. The R&D in this area leads to a strong and possible solution to the actual environmental problems. Such problems are based on the climate

Hugo Gil Silva; Marcos Afonso

2009-01-01

483

Temperaturleitfaehigkeit Reiner Fluide im Weiten Zustandsbereich um den Kritischen Punkt (Thermal Conductivity of Pure Fluids in a Large Region Around the Critical Point).  

National Technical Information Service (NTIS)

Thermal conductivity from -35 K to +50 K of 5 pure fluids is studied: sulfur hexafluoride, ethane, dinitrogen oxide, CClF3, and xenon. Data are obtained along the critical isochores and isotherms and on the binary phases curves. Light scattering and photo...

P. Jany

1986-01-01

484

Valores Psicossociais e Orientação à Dominância Social: Um Estudo Acerca do Preconceito Psychosocial Values and Social Dominance Orientation: A Study About Prejudice  

Microsoft Academic Search

The aim of this study was to analyze the relationships among prejudice and psychosocial values, by means of the orientation of social dominance, from four systems, the religious, the materialist, the post-materialist and, the hedonist. For this particular study, 205 undergraduate Psychology students were chosen from the city of João Pessoa - PB. They answered the social dominance orientation scale,

Sheyla Fernandes; Joseli Da Costa; Leoncio Camino; Roberto Mendoza

485

Hyper-numerical aperture (NA = 2.8) microscope using ? = 1.56 um femtosecond source for multi-photon imaging  

PubMed Central

A new microscope is discussed, where the scanning illumination has a numerical aperture of 2.8 with ? = 1.56 µm femtosecond fiber laser. Samples are placed or grown on a silicon substrate. Multi-photon emission is imaged in transmission on a cooled CCD. Two-photon and three-photon effects are observed from the silicon/water interface and gold nanoparticles. Images of cells, reference spheres and gold nanoparticles illustrate imaging properties of the microscope. Spectral characteristics of individual particles are achieved with a blazed transmission grating. Emission properties of differently sized gold nanoparticles are studied in detail, which indicate that their emission is a two-photon effect due continuum generation. Interestingly, spectral shape and emission power are similar for 20nm, 40nm and 60nm diameter gold nanoparticles for the cases studied.

Kim, Youngsik; Lu, Phat; Milster, Tom D.; Kieu, Khanh

2013-01-01

486

Influence of geomagnetic-ionospheric disturbances on SABER measurements of 4.3 um emission and the retrievals of kinetic temperature and carbon dioxide  

Microsoft Academic Search

The Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) experiment was launched onboard the TIMED satellite in December 2001. SABER is providing global measurements of broadband Earth infrared limb emission which are analyzed to provide vertical profiles, with approximately 2 km resolution, of kinetic temperature (Tk) and key chemical species needed to quantify the radiative and chemical energy balance

C. J. Mertens; P. G. Richards; J. R. Winick; R. H. Picard; L. J. Paxton; P. P. Wintersteiner

2004-01-01

487

Equality and Justice in Medicine: a paradigm of Uncertainty Equidade e Justiça em Medicina: um paradigma de Incerteza Equidad y Justicia en Medicina: un paradigma de Incerteza  

Microsoft Academic Search

Equity in the sense of equal access to mainline contemporary medicine is recognized as one of today's greatest challenges: economically, politically, and morally. The treatments of contemporary medicine are either unavailable or too expensive for most sick persons in the world. There is an experience of inequity and injustice which is extensive and can be turned into a motor for

James F. Drane

488

Status SociomØtrico e AvaliaÁªo de CaracterÌsticas Comportamentais: Um Estudo de CompetŒncia Social em PrØ-Escolares  

Microsoft Academic Search

This study examined the correlations between sociometric choices and preschool peersí behavioral descriptions. The appropriateness of an instrument created for the evaluation of behavioral attributes for five years old was tested, using illustrative cards to motivate participants during the task. Behavioral social characteristics evaluated were: social acceptance\\/ withdrawal, participation\\/lack of participation in schoolwork, dependence\\/independence from teacher and dominance\\/ submission. Affective

Maria de Lima Salum; Cristiana Tieppo Scala

2001-01-01

489

1.55-um optical phase-locked loop operation with large loop delays and monolithically integrated p-i-n/HBT photoreceivers  

NASA Astrophysics Data System (ADS)

The optical phase-locked loop (OPLL) provides a method of generating channel offsets for use in dense wavelength division multiplexed (WDM) systems. The development of monolithically integrated OPLLs will make their widespread application more feasible. Typical approaches to making hybrid OPLLs use either very narrow linewidth lasers or reduce the loop delay as much as possible. The use of semiconductor lasers with their moderately large linewidths has encouraged the development of very compact but inflexible loop designs. Previous designs using semiconductor lasers have avoided the use of fiber couplers to minimize loop delay. A hybrid, fiber-based system allows design, layout, and testing flexibility which is necessary in a test bed for the development of components for an integrated OPLL. In spite of the large loop delay that comes from using fiber components, we demonstrate that phase- locking can be achieved using semiconductor lasers of moderate linewidths and fiber components. We achieved a very wide hold-in range of 1.558 GHz and possible locking frequencies ranging from 100 to 20.75 GHz, both of which are among the best reported values. As the first step towards integration, a monolithically integrated p-i-n/HBT photoreceiver was successfully employed in the test bed.

Goetz, Peter G.; Eisele, Heribert; Syao, K. C.; Bhattacharya, Pallab K.

1997-01-01

490

1.55 um InAs/GaAs Quantum Dots and High Repetition Rate Quantum Dot SESAM Mode-locked Laser  

PubMed Central

High pulse repetition rate (?10?GHz) diode-pumped solid-state lasers, modelocked using semiconductor saturable absorber mirrors (SESAMs) are emerging as an enabling technology for high data rate coherent communication systems owing to their low noise and pulse-to-pulse optical phase-coherence. Quantum dot (QD) based SESAMs offer potential advantages to such laser systems in terms of reduced saturation fluence, broader bandwidth, and wavelength flexibility. Here, we describe the development of an epitaxial process for the realization of high optical quality 1.55 µm In(Ga)As QDs on GaAs substrates, their incorporation into a SESAM, and the realization of the first 10?GHz repetition rate QD-SESAM modelocked laser at 1.55 µm, exhibiting ?2?ps pulse width from an Er-doped glass oscillator (ERGO). With a high areal dot density and strong light emission, this QD structure is a very promising candidate for many other applications, such as laser diodes, optical amplifiers, non-linear and photonic crystal based devices.

Zhang, Z. Y.; Oehler, A. E. H.; Resan, B.; Kurmulis, S.; Zhou, K. J.; Wang, Q.; Mangold, M.; Suedmeyer, T.; Keller, U.; Weingarten, K. J.; Hogg, R. A.

2012-01-01

491

COMPETITIVIDADE, ESPECIALIZAÇÃO E VANTAGEM COMPARATIVA DO ESTADO DE MATO GROSSO NO MERCADO INTERNACIONAL: UM ESTUDO DE INDICADORES DE COMÉRCIO EXTERIOR NO PERÍODO 1996- 2007  

Microsoft Academic Search

Este artigo identifica os grupos de produtos do estado de Mato Grosso que exibem vantagens competitivas no comércio exterior durante o período 1996-2007. Para tanto, com base em dados da Secretaria de Comércio Exterior do Ministério da Indústria e Comércio, estimam-se indicadores de Comércio Exterior, tais como VCR (Vantagens Comparativas Reveladas), ICSC (Índice de Contribuição ao Saldo da Balança Comercial)

Paula Luciana Silva; Benedito Dias Pereira; Alexandre Magno Faria; Gerson Rodrigues Silva; Arturo Zavala Zavala

2008-01-01

492

Promoção da saúde e trabalho: um ensaio analítico Health promotion and work: an analytic essay Promoción de la Salud y del trabajo: un ensayo analítico  

Microsoft Academic Search

RESUMO Este artigo teve como propósito discutir a articulação entre promoção da saúde e trabalho, na perspectiva de aproximar as práticas em saúde do trabalhador, com o enfoque na promoção da saúde. Para tanto, discutimos a trajetória histórica da promoção da saúde e das políticas de saúde do trabalhador no Brasil, apontando suas dificuldades, limitações e perspectivas. Em seguida, analisamos

Soraya Maria de MedeirosIII

493

Efeitos de um programa de orientação de atividade física e nutricional sobre o nível de atividade física de mulheres fisicamente ativas de 50 a 72 anos de idade  

Microsoft Academic Search

Effects of an intervention program of physical activity and nutrition orientation on the physical activity level of physical- ly active women aged 50 to 72 years old The promotion of a physically active lifestyle in elderly people has been used as a strategy to promote improvement in health standards and quality of life. The objective of this study was to

Marcela Ferreira; Sandra Matsudo; Victor Matsudo; Glaucia Braggion

2005-01-01

494

ÁREA TEMÁTICA: OPERAÇÕES PROCESSOS DE SELEÇÃO DE PROJETOS: O FUNIL DE DESENVOLVIMENTO NA INDÚSTRIA DE BRINQUEDOS GROW - UM ESTUDO DE CASO AUTORES  

Microsoft Academic Search

Nowadays, the market of toys in Brazil goes by several structural transformations in function of the strong international competition and of the high degree of the consumers' demand that stops an access to the information every time larger and they come across very varied lines of products to choose. In that scenery, the innovation of products and processes as a

LEANDRO JOSÉ MORILHAS

495

Confidencialidade, aconselhamento genético e saúde pública: um estudo de caso sobre o traço falciforme Confidentiality, genetic counseling, and public health: a case study on sickle cell trait  

Microsoft Academic Search

Sickle cell anemia is the most prevalent genetic disease in Brazil. Screening for sickle cell trait in blood donation centers has been recommended by the Brazilian government since 1976. This screening mechanism is one of most common forms of genetic screening for sickle cell disease in the country. This article is based on an ethno- graphic survey of individuals undergoing

Debora Diniz; Cristiano Guedes

496

O GOZO DA INTERPRETAÇÃO: UM ENSAIO SOBRE A CRÍTICA PSICANALÍTICA DA OBRA LITERÁRIA (The joy of the interpretation, an analysis on the psychoanalytical critique of the literary composition)  

Microsoft Academic Search

We analyzed the dynamics of the psychoanalytical method of interpretation and its use indifferenced in the literary compositions. This paper aims to examine the role of the psychoanalytical interpretation of literature, observing its vicissitudes and its relation with the power and the literary experience. Leaving of the supposed parity with the psychic life analyzed in the setting analytical and the

Leonardo Pinto de Almeida; Raul Marcel; Filgueiras Atallah

497

Effects of resist strip processing damage on the electrical characteristics of 0.8-um a-Si antifuse circuit elements  

NASA Astrophysics Data System (ADS)

Field-programmable ASICs have been implemented using a variety of programmable circuit elements, including SRAM, EPROM, E2PROM, and antifuse cells. Amorphous silicon (a-Si) antifuse cells offer greater packing densities and superior performance compared to cells based on memory elements, and they can be integrated into conventional multi-layer integrated circuits with the addition of several process modules. Despite their advantages, a potential yield issue with a-Si antifuses is that their electrical characteristics can be affected by damage from manufacturing processes. In this study, it is found that the programming voltage is reduced when a solvent-based post-resist strip solution is applied to the bottom electrode layer of TiW. Atomic-force microscopy (AFM) shows that the resist strip solution increases the micro-roughness of TiW films. It is also found that the `off-'state leakage current increases when the solution is applied to the a-Si antifuse layer. The amount of the leakage current increase is related to the amount of a-Si loss due to the strip solution.

Fujishiro, Felix; Vines, Landon; Ravindhran, K. S.; Han, Yu-Pin; Echtle, Danny; Garcia, Annette; Richardson, Brian; Weling, Milind; Hickey, James; Loh, Ying-Tsong

1994-09-01

498

Application of APCVD TEOS/ozone thin films in < 0.5-um IC fabrication: trench and intermetal dielectric isolation and gap fill  

NASA Astrophysics Data System (ADS)

Basic film and process characteristics in conjunction with electrical test results are presented showing the effect of implementing a void free oxide for both intermetal and shallow trench isolation. An integrated intermetal dielectric (IMD) process is evaluated on fully functional 0.5 micrometers BiCMOS memory circuits. The integrated process uses two different films, an oxide for gap fill deposited at atmospheric pressure (APCVD) using a TEOS/O3 chemistry, and a second oxide deposited from TEOS using plasma enhanced CVD(PETEOS) for planarization, stress management, and moisture protection. The effect of a thin PETEOS barrier between TEOS/O3 and the underlying metal is explored, and some issues concerning the integration of chemical mechanical polishing into a void free backend process flow are investigated. The suitability of undoped APCVD TEOS/O3 thin films for isolation trench fill is also characterized and described. Process variable which determine the relevant properties for trench fill are evaluated. Well-behaved MOS transistors with excellent parasitic performance were achieved using trench isolation and are reported.

West, Jeff P.; Fry, H. W.; Poon, Stephen; Boeck, B. A.; Yu, Chris C.

1993-09-01

499

Imbe ddi ng AIED i n i e TV through Broadband Use r Mode l l i ng (BbUM)  

Microsoft Academic Search

Earlier this year we were asked to offer an AIED perspective to the development of interactive educational television (ie-TV). This theme paper discusses our response to the question: what can the field of AIED offer to developers of education for the wired and wireless future with particular respect to TV? We note the changes that have taken place over the

ROSEMARY LUCKIN; BENEDICT DU BOULAY

500

PFS-MEX nadir observations at 4.3 um in the Mars atmosphere with account for non-LTE emissions  

NASA Astrophysics Data System (ADS)

Non-LTE emissions in the Mars atmosphere have been observed at different wavelength from spacecrafts and ground-based instruments. Since these features are originated at high atmospheric altitudes, most of the observations have been taken at limb (Maguire et al., 2002; Formisano et al., 2006). However, also in a nadir geometry these features are relevant, and recently, an averaged spectra obtained by co-adding 1680 single spectra taken by the Planetary Fourier Spectrometer (PFS) on board Mars Express has been successfully compared to a theoretical non-LTE model (Lopez Valverde et al., 2005). Our intent was to build upon that work by analysing in more detail the full 4.3 µm region in PFS nadir observations, characterizing not only the non-LTE emissions but also the contributions from the surface and the lower atmosphere, particularly important in the wings of this spectral band. The ultimate goal is to derive information about the lower atmosphere, the dust optical thickness and the surface albedo at these wavelengths by a proper consideration of the non-LTE contamination.

Piccialli, A.; Palomba, E.; Lopez Valverde, M. A.; Gilli, G.; Grassi, D.; D'Amore, M.; Formisano, V.