999 resultados para Média potência


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

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Pós-graduação em Bases Gerais da Cirurgia - FMB

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Pós-graduação em Agronomia (Horticultura) - FCA

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Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

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Pós-graduação em Agronomia (Horticultura) - FCA

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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The researching centre mentioned was conceived em 1989, with the goal to study and implement the media of comunication by creating and effecting online printed medias for care institutions, schools and UNESP. The university has taken a give-and-take function between itself and the society. The founder of this group is Prof. Dr. Ricardo Nicola that since 1996 has established a link between university and society, using this centre for developing works that go over the university's borders. The group's work comprehends four different classes: literary , tecnical, journalism and advanced research . The literary one involves help and literary production for new authors, the tecnical helps in publishing theses; the journalism one is related to journal and medias in and out of the university; the advanced research one has is caracterized as a class between departments and branches.

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This paper presents results of an evaluation of the quality of the coverage of issues associated to the preservation of rights of children and adolescents in the eight main newspapers of major cities of Bauru (Sao Paulo State) administrative region, from August 2008 to March 2009. In a total of 389 assessed stories, 66% portrayed acts of legal infraction and violence with children and adolescents as victims or perpetrators, with a fragmented and superficial perspective; 34% are greater approaches about public policies aimed at the preservation of social rights. The results show the existence of a smaller number, yet significant, of stories which presented extended and more contextualized approaches. From a general view, we can point out that the contribution given by the media as a form of vigilance over the execution of public policies has been limited, which justifies the concern of demanding, from the mass media, measures to fulfill the role attributed to them by contemporaneous democracies to the strengthening of citizenship.

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The globalization in the last century made possible to the human bean to know everything about all cultures in the world. Although the knowledge conduct many people to leave the tradition of their society in order to adopt the new values that could cause the abandon of the tradition.

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This paper presents the development and the main results for an interleaved boost rectifier operating as a special input power stage for a trolleybus type vehicle, allowing its feeding by alternate current (AC) or direct current (DC) distribution power systems. When feeding with two wires (single phase) alternate current distribution system, the converter accomplish active power factor correction, providing a relatively sinusoidal current with low total harmonic distortion (THD) and fully complying with IEC 61000-3-4 standards. In addition, a management control system promotes the required automatic operation changes for the proposed rectifier when the vehicle is changing from the DC distribution power system to the AC distribution power system and vice-versa, keeping its original electrical DC system characteristics for the adjustable speed driver sub-system. The main experimental results for a prototype rated at 150kW are presented, considering its application for a trolleybus with DC adjustable speed driver, demonstrating the proposed converter benefits and the possibility of AC feeding system for trolleybus type vehicle.