992 resultados para Tecnologia Limpa


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This paper presents some results from a study of undergraduate students from different regions of the State of São Paulo that sought to better understand the relationships between society and perceptions and attitudes towards technological development. Noting that the media, academia and official documents regulating education understand and present the technology in a distinct and often contradictory ways, this paper seeks to review existing literature on the different ways to conceptualize this term, and thereafter, to develop a Likert' scale for mapping the concepts of students. Using the confirmatory analysis of structural equation modeling, this research concludes that the sample studied shows a classical view, but outdated, what means technology, by linking it to science and technology without distinction or critical viewpoints.

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In this contribution, we discuss and analyze some aspects of nanoscience and nanotechnology, based on the approach kwon as Science, Technology and Society (STS), as well as the prospects of Philosophy of Technology. In this context, we specify the constitute the nanoscience and nanotechnology analytic research field. I is also reported its genesis and limits, emphasizing the impacts of nanotechnology in the development of the contemporary society, such as the possible benefits and problems associated to the use of nanotechnology, as well as environmental impacts, doubts and uncertainties that permeate this areas, in addition some ethical questions and public policies for the sector are analyzed.

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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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De um lado, tem-se o fato de que o jornalismo auxilia na formação da opinião pública ao ocupar o lugar de “confiabilidade” na sociedade contemporânea. Do outro, a liberdade do público para consumir conteúdos na web, e uma relativa autonomia para produzir seus próprios conteúdos. A equação que soma a formação da opinião pública pelos jornais à autonomia do público, tem como resultado um certo “descontrole” da opinião pública por parte dos jornais, e evidencia a relevância de estudos acadêmicos para tentar entender essa nova realidade. Este artigo traz um diálogo entre ideias postas por Nilson Lage (1996), John Keane (1998) e Paul Levinson (2012) a respeito das mudanças estruturais na sociedade e a formação de opinião pública. O jornalismo especializado em tecnologia, e a presença de temas ligados à cultura livre nessas páginas é o que permeia a discussão.

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This article is part of the result of the Master's thesis of the author, guided by coauthor, and presents a theoretical and conceptual reflection on the representation of Technology in thematic sections Technology in four Brazilian newspaper sites. The fundamental hypothesis is that these editorials prioritize issues that meet market interests of companies in the sector and may be leaving out important social and cultural issues to the understanding of the relationship between technology and society. The study is itself oriented by prospects of journalistic theming and specialized journalism, from a quantitative analysis involving the websites from newspapers of Technology sections O Estado de S. Paulo, Folha de S. Paulo, Gazeta do Povo and Correio Braziliense. The study confirms the hypothesis that representation of Technology in newspapers is primarily the marketing, have not corresponding to an expectation of social and cultural concept. In addition, it is noticed that the editorial in question do not have specialized journalism characteristics, despite of potential generated by thematic segmentation.

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Digital Television offers a resolution of highdefinition images and the possibility of interaction with the user. There is an estimate that by 2018 all municipalities in Brazil have digital signal availability and thus there will be a wide spread of Ginga. Ginga is a technology developed for digital television, which runs between the operating system and yours applications. However, the extensive use of Smart TVs would invalidate this technology? This article to cast a look on the topic, arousing reflection that effect and seeking bring issues that link the advantages and disadvantages of the two technologies, considering the current situation of Digital TV in Brazil.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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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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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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The swine culture potentially generates waste with high organic load and pollutants, being responsible for the spread of pathogens, contamination of rivers, groundwater and soils, besides it produces foul odors and emit greenhouse gases. However, the high amount of organic matter, which expresses the amount of pollutant load, reflects the energetic potential of these wastes used as raw material in biogas generation through technology of digesters. The properly use of theses digesters provides the production of clean energy and promotes the conservation of the environment. The economic viability of the implantation of an Indian model digester on a small swine farm was verified based on the value from initial investments of deployment, maintenance costs, depreciation, and on the interest and revenues arising from the system. Besides, the amount of biogas produced daily and the average consumption of biogas by the most common used devices such as refrigerator, stove, water heater, and generator of electricity was calculated.. For a backdrop of 10 years, the results of economic indicators NPV of BRL 57,598.95, IRR of 48.38%, Simple Payback of 2.06 years, and Discounted Payback of 2.3 years, demonstrated a favorable outlook for the use of this technology, with the possibility to generate economic, social and environmental benefits.

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Pós-graduação em Planejamento e Análise de Políticas Públicas - FCHS

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Pós-graduação em Educação para a Ciência - FC