996 resultados para Representação de números binários


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Pós-graduação em Matemática em Rede Nacional - IBILCE

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

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This paper describes an investigation into the initial training of foreign language teachers (German and English) and the internships required in the fourth year, considering the possibility that online forums may provide a virtual environment for the manifestation of critical thinking by future teachers. We analyze the messages and themes addressed in three forums, based on concepts of critical thinking and on the theoretical model of Practical Inquiry proposed by Garrison, Anderson and Archer (2000; 2001). For a better understanding of the phases in discussions on topics, we use the model of these authors, also identifying some discourse markers characterized by them, mainly based on the assumptions of Systemic Functional Linguistics (HALLIDAY, 1994) and on the types of conversational moves proposed by Eggins and Slade (1997). A new model was created based on the selected theoretical underpinnings and on the analysis of the data, as well as the conclusion was that online forums can be considered an important tool for the manifestation of teachers' critical thinking and for a critical reflexive education, in a context marked by the specificities of information society.

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Assuming from the very beginning that contemporary democracies cannot work without active parliaments, this article deals with the recurrent image of the crisis of representation of the modern State, that is, with the latter's alleged difficulties to fulfill some of the strategic roles demanded by complex societies in recent times. I contend that the problems of legitimacy in today's political systems are linked with the crisis of the State triggered by the new economic and social structures of contemporary capitalism. According to my hypothesis, the transformations of capitalist society - i.e., of hypermodernity - jeopardized and bypassed representation, which is now facing serious operational issues.

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

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

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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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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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In an ever more competitive environment, power distribution companies must satisfy two conflicting objectives: minimizing investment costs and the satisfaction of reliability targets. The network reconfiguration of a distribution system is a technique that well adapts to this new deregulated environment for it allows improvement of reliability indices only opening and closing switches, without the onus involved in acquiring new equipment. Due to combinatorial explosion problem characteristic, in the solution are employed metaheuristics methods, which converge to optimal or quasi-optimal solutions, but with a high computational effort. As the main objective of this work is to find the best configuration(s) of the distribution system with the best levels of reliability, the objective function used in the metaheuristics is to minimize the LOLC - Loss Of Load Cost, which is associated with both, number and duration of electric power interruptions. Several metaheuristics techniques are tested, and the tabu search has proven to be most appropriate to solve the proposed problem. To characterize computationally the problem of the switches reconfiguring was developed a vector model (with integers) of the representation of the switches, where each normally open switch is associated with a group of normally closed switches. In this model simplifications have been introduced to reduce computational time and restrictions were made to exclude solutions that do not supply energy to any load point of the system. To check violation of the voltage and loading criteria a study of power flow for the ten best solutions is performed. Also for the ten best solutions a reliability evaluation using Monte Carlo sequential simulation is performed, where it is possible to obtain the probability distributions of the indices and thus calculate the risk of paying penalty due to not meeting the goals. Finally, the methodology is applied in a real Brazilian distribution network, and the results are discussed.

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Pós-graduação em Geografia - IGCE

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Pós-graduação em Ciências Sociais - FCLAR

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

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)