910 resultados para Nível hidrostático


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The concept of scientific literacy nowadays is permeated by principles eventually inconsistent. Development of cognitive skills, preparation for continuing studies in higher education, preparation for working life and the strengthening of citizenship are some of the competing goals of science education. In respect of Science, Technology, Society and Environment (STSE) Education, the politics of science should be properly taken into account by science education. This paper examines the concept of scientific literacy in the context of STSE Education and points to why and how physics education in high school curriculum should address topics of energy consumption and production in order to provide the background necessary to assess public policies of science, technology and innovation, in particular the Decennial Plan for Expansion of Energy 2020, subjected to public consultation by the Brazilian Ministry of Mines and Energy in 2011.

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Although leisure physical activity has been investigated in general population, there is absence of data in Brazilian Public Health System about this issue. Thus, the purpose of this study was to analyze in patients attended by Public Health System the prevalence of leisure physical activity, as well as, to identify its correlates and associated diseases. Sample was composed by 963 patients (707 female and 256 male) randomly selected at five basic healthcare units. Leisure physical activity was assessed by Baecke’s questionnaire and subjects with ≥180 and ≥240 minutes per week were classified as sufficiently active. General and central obesity were assessed by body mass index and waist circumference, respectively. Diseases of high occurrence were classified according CID-10. There was low rate of physically active subjects in leisure time (14.8%),but high rate of abdominal obesity (70.1%) and orthopedic diseases (72.1%). Physically active subjects in leisure time had lower occurrence of orthopedic diseases (OR= 0.60 [OR95%CI: 0.37 – 0.98]). The same pattern of association was observed for central obesity (OR= 0.35 [OR95%CI: 0.19 – 0.65]). It is low the rate of physically active in leisure time at Brazilian Public Health System, which is associated with orthopedic diseases.

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The aim of this study was to evaluate the level of physical activity confronting to the real and ideal body image of 65 individuals of both gender (27 women and 38 men) aged between 18 and 37 years old, all students of a Physical Education College of Santo André´s City - SP. The instruments used were the International Physical Activity Questionnaire, Short version (IPAQ, 2005) and Test for assessment of Body Image proposed by Stunkard et al., (1983) and adapted by Marsh and Roche (1996). According to the results, male subjects are more actives compared with female, as well as for the real and ideal body image males showed no significant difference, however, the females showed differences between the real and the ideal body image, between the gender no significant differences existed on the real and ideal body image. We can conclude that the students of this Physical Education College mostly presents in moderate or high level of physical activity, showing that the male are pleased with the real and ideal body image, and for a willing female body silhouette thinner ideal than real, with no significant differences between genders, and thus leading us to believe that the physical education College lead the students to experience practical activities becoming them lifestyle most active in search of a better quality of life and wellness.

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In this contribution, we analyze conceptual approaches to nanotechnology and nanoscience in recent issues of secondary education of Brazilian physics textbooks. We analyzed fifteen collections of Physics textbooks of recent editions, however, only two books, belonging to different collections incorporate considerations about nanotechnology and nanoscience in their approaches. We focus our analysis on three aspects, namely: the place dedicated to approaches to nanoscience and nanotechnology, notions about technology and its contributions to critical scientific education. This is a qualitative research; it was used as conceptual approaches the Philosophy of Technology, The Discourse Analysis (DA) and Science, Technology, Society (STS) concepts. We found that in two examined textbooks the approaches to nanoscience and nanotechnology is a complementary description of modern physics, associated with quantum theory. In this context, the concepts of nanoscience and nanotechnology focus superficially in the genesis of the field and some possible areas of applications. It was not identified in all textbooks warnings about the potential risks to human health and the environment from the use of nanotechnology and nanoscience. We understand that textbooks approaches about nanotechnology and nanoscience round a instrumental technological perspective, however keep away from the scientific and technological critical education.

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Este artigo apresenta um caso histórico de colapso dos solos que ocorreu durante e após o enchimento do reservatório da UHE Três Irmãos na região noroeste do Estado de São Paulo. A construção desta barragem e o subseqüente enchimento do reservatório elevaram significativamente o lençol freático, causando uma série de problemas em algumas . Trabalhos de campo e de laboratório foram realizados para determinar o potencial de risco associado às edificações existentes no local. A elevação do lençol freático foi monitorada especialmente para o estudo de recalques de edificações. São apresentados os aspectos principais do processo de colapso deflagrado na região e as conseqüências advindas de sua ocorrência, bem como, a importância da colapsibilidade na elaboração de projetos de engenharia, visando minimizar impactos em áreas urbanas.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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In this paper, we will present an overview of the smart grid defining the three main systems that compose it: smart infrastructure system, smart management system and smart protection system. We will conceptualize a functionality of smart management system, the conservative voltage reduction, citing its benefits and its history of application. And, finally, we'll cover a test in which we reduce the nominal voltages on incandescent bulbs, CFL and LED, in the context of residential lighting, and on LED and HPS, in the context of public lighting. The test aims to check whether the voltage reduction adversely affects sources of lighting by measuring the temperature manually with a thermal imaging camera FLIR and illuminance with a LUX meter. The set of power factor, total harmonic distortion, and input power values will be collected automatically through the power quality Analyzer Fluke 345 with a probe Fluke Hall Effect Current. For residential lighting, it was found that both CFL and LED had good performance with the smallest variations in illuminance. Between both, the LED source had the lowest harmonics and the lowest power consumption, on the other hand incandescent bulbs had a bad performance as expected. Public light sources also had a good performance and obtained power factors within the standards, as opposed to the CFL and LED residential sources. The data collected clearly shows the feasibility for nominal voltage reductions. Even with small reductions, there are possibilities of savings which can be passed on to the utilities and consumers

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In this paper, we will present an overview of the smart grid defining the three main systems that compose it: smart infrastructure system, smart management system and smart protection system. We will conceptualize a functionality of smart management system, the conservative voltage reduction, citing its benefits and its history of application. And, finally, we'll cover a test in which we reduce the nominal voltages on incandescent bulbs, CFL and LED, in the context of residential lighting, and on LED and HPS, in the context of public lighting. The test aims to check whether the voltage reduction adversely affects sources of lighting by measuring the temperature manually with a thermal imaging camera FLIR and illuminance with a LUX meter. The set of power factor, total harmonic distortion, and input power values will be collected automatically through the power quality Analyzer Fluke 345 with a probe Fluke Hall Effect Current. For residential lighting, it was found that both CFL and LED had good performance with the smallest variations in illuminance. Between both, the LED source had the lowest harmonics and the lowest power consumption, on the other hand incandescent bulbs had a bad performance as expected. Public light sources also had a good performance and obtained power factors within the standards, as opposed to the CFL and LED residential sources. The data collected clearly shows the feasibility for nominal voltage reductions. Even with small reductions, there are possibilities of savings which can be passed on to the utilities and consumers

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Objetivo Este estudo teve como objetivo avaliar a variabilidade e a frequência do consumo alimentar, o estado nutricional e o nível de atividade física em uma comunidade universitária brasileira. Métodos A amostra constitui-se de 303 voluntários (130 homens e 173 mulheres) pertencentes à comunidade universitária do interior de São Paulo e avaliada por meio da disponibilização pela Internet do Questionário de Frequência Alimentar do International Physical Activity Questionaire e por meio da coleta da descrição autorreferida do peso e da altura. Foi realizada análise descritiva dos dados, análise de frequência alimentar e teste do coeficiente de correlação de Spearman. Resultados Foram observados inadequação dos hábitos alimentares, sobrepeso e obesidade na amostra estudada. As correlações entre os grupos alimentares apresentaram valores de magnitude maiores no grupo de mulheres que se alimentam de forma mais adequada do que os homens, mas não foram observadas diferenças entre os sexos no nível de atividade física. Não houve correlação significativa entre grupos de alimentos consumidos, índice de massa corporal e nível de atividade física em ambos os sexos. Conclusão A comunidade universitária estudada apresentou baixo consumo de frutas, legumes e verduras, bem como consumo insuficiente de alimentos do grupo de cereais e leguminosas.