999 resultados para Fertilizantes – Tecnologia


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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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Pós-graduação em Engenharia Elétrica - FEIS

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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This paper has two main objective the study of the productive space circuit of fertilizers in Brazil. For this, we study the company's operations Vale Fertilizers SA More specifically, the production and consumption of fertilizers in Brazil. In the current globalization the Brazilian countryside know new ways of doing (SANTOS, 1994). This, with less roughness, adopts the Green Revolution package, and introduces inputs to the soil, such as seeders, combines, tractors, herbicides, fungicides and fertilizers (Santos & Silveira, 2001). The examination of the Brazilian case as the agricultural modernization reveals the great vulnerability of modern agricultural regions in the face of globalizing modernization (Santos, 2000: 92). The places that receive capital reproduction of imperatives gain a new medium, is the formation of informational scientific technical means, are the bright spots corresponding to other places (Santos, 1994). Thus, the productive circuits are no longer confined to the environment, but establish connections with distant places (Santos, 1986; Frederick & CASTILLO, 2004). What's more, the policy is now made in the market (Santos, 2000, p.67) and the adoption by the Brazilian government's neoliberal policies, the Brazilian state-owned companies related to fertilizer production circuit are privatized, thereby Brazil makes It is further more dependent on inputs used in the field, including fertilizers

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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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

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)