984 resultados para Energia escura (Astronomia)
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Para avaliar e planejar dietas para indivíduos e grupos populacionais são necessárias estimativas muito acuradas das necessidades e do consumo de energia. O objetivo foi realizar uma revisão bibliográfica das metodologias de determinação das necessidades energéticas para adultos e dos métodos de avaliação do consumo. Em 1918, Harris e Benedict propuseram equações que estimam a necessidade energética basal a partir de calorimetria indireta para indivíduos, depois disso, foram propostas outras equações para o cálculo das necessidades de energia em repouso ou em atividade. Recentemente, a água duplamente marcada é empregada para propor equações mais apropriadas. Contudo, a acurácia destas equações pode ser questionada. Por outro lado, os métodos de avaliação do consumo energético apresentam limitações que demandam cuidado na escolha e aplicação, assim como na interpretação dos resultados. A escolha do método de avaliação depende e pode ser influenciada pela população avaliada, tipo e objetivo do estudo, tempo disponível e do treinamento dos avaliadores. Deste modo, a avaliação do balanço energético está condicionada, tanto às limitações da avaliação através de equações, quanto dos métodos existentes de avaliação do consumo alimentar.
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Pós-graduação em Engenharia Elétrica - FEIS
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Pós-graduação em Engenharia Elétrica - FEIS
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Engenharia Mecânica - FEG
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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This paper presents some outcomes of a broader research on Astronomy Education in primary school teacher's education. From the analysis of the main astronomy subjects thought nationwide and the research outcomes, we identified a set of astronomy contents considered fundamental to the teachers practice. Through a research carried out among a sample of primary school teachers, however, we show that, even in these essential contents, persists alternative conceptions among those teachers. Data collected pointed out, thus, to the necessity of improving teacher's education in this area, taking into consideration astronomy edu cation research outcomes, in favor of a teaching which contemplates, at least, the fundamental contents on this subject.
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This article discusses the policy implications of agricultural modernization implemented by the military - after 1964. This policy, which became known as the Green Revolution, on the one hand contributed to the development of big business, but another caused serious social and environmental impacts. Currently, not only in Brazil but all over the world, have been in a great debate about the need to find alternatives to contain the problems caused to the environment resulting from the use of high technology in the field. One alternative proposed by several researchers is to replace fossil fuels by biofuels. As we believe that the error is in the current model of agricultural production based on mass production, which serves the major markets, the attention in this article, the need to develop an agricultural model designed for small property, with the use of family work and agroecology.
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Despite of intense discussion over recent decades about the inclusion of disabled people and the influence of conception of teachers about that inclusion for the effectuation of it, this work sought to identify conceptions of science teachers regarding the inclusion of students with visual impairment in the classes of astronomy providing basis for future studies.
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Our work aims to discuss the teaching of science in the context of informal education. Thus, we present and analyze the results of an initiative that we have made seeking to interest high school students to study sciences and technology. The Energy shows are activities which are presented in experimental demonstrations of science concepts to middle school students. After the show the students respond to a questionnaire which formed the basis for this study. The results indicate that the achievement of shows have had an impact on students.