433 resultados para 1348


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Mode of access: Internet.

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Photocopy. Ann Arbor, Mich. : University Microfilms, 1981.

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Description based on: no. 880 (Jan. 7, 1911); title from cover.

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Prepared under the supervision of H.C. Maxwell Lyte. Text by R.F. Isaacson, vol. 1-15 (with G.J. Morris and H.E. Lawrence, vol. 1; C.B. Dawes, vol. 13-15); C.B. Dawes, vol. 16.

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Variáveis como depressão, ansiedade, estresse e qualidade de vida, oferecem indicativos de saúde e doença de jovens, estudantes em fase de formação profissional; é importante detectar sinais e sintomas leves ou graves, uma vez que representam quatro das dez principais causas de incapacidade no mundo. Assim, o presente estudo apresentou como objetivos: a) Caracterizar o perfil sócio demográfico dos estudantes universitários das duas instituições em estudo estudadas; b) Avaliar sintomas de depressão dos estudantes; c) Avaliar sinais de ansiedade e estresse dos estudantes; d) Avaliar a qualidade de vida geral dos estudantes; e) correlacionar as variáveis qualidade de vida, sinais e sintomas de ansiedade, depressão e estresse dos discentes d) correlacionar as variáveis qualidade de vida geral, sinais e sintomas de ansiedade, depressão dos discentes. Participaram da pesquisa 570 Universitários, 344 eram estudantes da Universidade Metodista de São Paulo e 226 da Universidade Federal do Amazonas, dos gêneros feminino e masculino, entre 16 e 55 anos, estudantes de diferentes cursos universitários da área da saúde e humanas. Para coleta de dados foram utilizados os seguintes Instrumentos: questionário de dados socioeconômicos e culturais; WHOQOL Breve Avaliação da Qualidade de Vida composta por 26 questões e EADS Escala de Depressão, Ansiedade e Estresse composta por 21 itens; .Os instrumentos, autoaplicáveis, foram feitos aplicados em ambiente acadêmico de sala de aula, com a devida autorização do professor e direção, informo que o projeto foi e aprovação pelo do Comitê de Ética (Plataforma Brasil) das respectivas universidades em questão. Os dados foram avaliados estatisticamente com auxílio do Programa SPSS versão 2.0 para Windows. Os resultados mostraram que a maioria da amostra é do curso de Psicologia, Gestão em Recursos Humanos e Pedagogia (39%), sendo do 1º e 4º(32%) anos, a escolha do curso foi 1ºopção (66%), mora com familiar (76,9%) e não mudou de residência para estudar na Universidade (83,3%). Os resultados revelaram que o melhor nível de QV encontra-se nos domínios Psicológico e Social da Instituição UFAM localizada no Estado do Amazonas. Os domínios mais afetados, ou seja, aquele, em que os universitários encontram mais prejuízo é no que se referem ao domínio Físico e Meio Ambiente de ambas as Instituições estudadas. Com relação ao EADS, pode se observar que a maior média apresentada refere-se ao fator estresse das duas Instituições estudadas, sendo representado pelo resultado de 15.00 (UMESP) e 12.70 (UFAM) e a média menor foi no fator ansiedade UMESP (7,51). Assim sendo, observa-se que os estudantes obtiveram um grau leve de estresse, depressão e ansiedade em ambas instituições estudadas. Analisando e ao correlacionar os domínios de qualidade de vida e as variáveis ansiedade, depressão e estresse, observou-se uma correlação significativa negativa em todas as variáveis, sendo maior entre depressão e domínios psicológico e ambiental,.Isso significa que quanto maior a depressão, menor a qualidade de vida nos domínios psicológico e ambiental. A partir dos resultados, sugerem-se estudos mais aprofundados.

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Results are reported from recent research on the use of the Brillouin gain/loss mechanism for distributed sensing. A theoretical model of the interaction of the pulsed and CW beams is described and compared with experiments. Results from a system with a 51 km sensing length are presented. We finally investigate issues related to the variation within the sensing fiber of the polarizations of the two beams.

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We demonstrate a simple technique for the implementation of an all-optical integrator based on a uniform-period fiber Bragg grating (FBG) in reflection that is designed to present a decreasing exponential impulse response. The proposed FBG integrator is readily feasible and can perform close to ideal integration of few-picosecond and subpicosecond pulses.

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To capture the genomic profiles for histone modification, chromatin immunoprecipitation (ChIP) is combined with next generation sequencing, which is called ChIP-seq. However, enriched regions generated from the ChIP-seq data are only evaluated on the limited knowledge acquired from manually examining the relevant biological literature. This paper proposes a novel framework, which integrates multiple knowledge sources such as biological literature, Gene Ontology, and microarray data. In order to precisely analyze ChIP-seq data for histone modification, knowledge integration is based on a unified probabilistic model. The model is employed to re-rank the enriched regions generated from peak finding algorithms. Through filtering the reranked enriched regions using some predefined threshold, more reliable and precise results could be generated. The combination of the multiple knowledge sources with the peaking finding algorithm produces a new paradigm for ChIP-seq data analysis. © (2012) Trans Tech Publications, Switzerland.

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Results are reported from recent research on the use of the Brillouin gain/loss mechanism for distributed sensing. A theoretical model of the interaction of the pulsed and CW beams is described and compared with experiments. Results from a system with a 51 km sensing length are presented. We finally investigate issues related to the variation within the sensing fiber of the polarizations of the two beams.

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Results are reported from recent research on the use of the Brillouin gain/loss mechanism for distributed sensing. A theoretical model of the interaction of the pulsed and CW beams is described and compared with experiments. Results from a system with a 51 km sensing length are presented. We finally investigate issues related to the variation within the sensing fiber of the polarizations of the two beams.

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Enantioselective catalysis is an increasingly important method of providing enantiomeric compounds for the pharmaceutical and agrochemical industries. To date, heterogeneous catalysts have failed to match the industrial impact achieved by homogeneous systems. One successful approach to the creation of heterogeneous enantioselective catalysts has involved the modification of conventional metal particle catalysts by the adsorption of chiral molecules. This article examines the contribution of effects such as chiral recognition and amplification to these types of system and how insight provided by surface science model studies may be exploited in the design of more effective catalysts.

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When people rapidly judge the truth of claims presented with or without related but nonprobative photos, the photos tend to inflate the subjective truth of those claims-a "truthiness" effect (Newman et al., 2012). For example, people more often judged the claim "Macadamia nuts are in the same evolutionary family as peaches" to be true when the claim appeared with a photo of a bowl of macadamia nuts than when it appeared alone. We report several replications of that effect and 3 qualitatively new findings: (a) in a within-subjects design, when people judged claims paired with a mix of related, unrelated, or no photos, related photos produced truthiness but unrelated photos had no significant effect relative to no photos; (b) in a mixed design, when people judged claims paired with related (or unrelated) and no photos, related photos produced truthiness and unrelated photos produced "falseness;" and © in a fully between design, when people judged claims paired with either related, unrelated, or no photos, neither truthiness nor falsiness occurred. Our results suggest that photos influence people's judgments when a discrepancy arises in the expected ease of processing, and also support a mechanism in which-against a backdrop of an expected standard-related photos help people generate pseudoevidence to support claims. (PsycINFO Database Record)

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AMS Subj. Classification: 65D07, 65D30.

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Alzheimer's disease (AD) is the most common form of dementia, affecting more than 35 million people worldwide. Brain hypometabolism is a major feature of AD, appearing decades before cognitive decline and pathologic lesions. To date, the majority of studies on hypometabolism in AD have used transgenic animal models or imaging studies of the human brain. As it is almost impossible to validate these findings using human tissue, alternative models are required. In this study, we show that human stem cell-derived neuron and astrocyte cultures treated with oligomers of amyloid beta 1-42 (Aβ1-42) also display a clear hypometabolism, particularly with regard to utilization of substrates such as glucose, pyruvate, lactate, and glutamate. In addition, a significant increase in the glycogen content of cells was also observed. These changes were accompanied by changes in NAD+ /NADH, ATP, and glutathione levels, suggesting a disruption in the energy-redox axis within these cultures. The high energy demands associated with neuronal functions such as memory formation and protection from oxidative stress put these cells at particular risk from Aβ-induced hypometabolism. Further research using this model may elucidate the mechanisms associated with Aβ-induced hypometabolism.