Thesis (M.A.(Human Movement Science))--University of Pretoria, 2003. / Summary in English and Afrikaans. Includes bibliographical references.

Thesis (Ph. D.)--Indiana University of Pennsylvania. / Includes bibliographical references.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1983. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 548-572).

Thesis (Ed. D.)--Oregon State University, 2006. / Printout. Includes bibliographical references (leaves 259-264). Also available on the World Wide Web.

Thesis (Ph. D.)--University of California, San Diego, 2000. / Vita. Includes bibliographical references (leaves 380-398).

No novo contexto do setor elétrico brasileiro, as concessionárias passam a ter uma nova postura quanto à gestão. A energia elétrica, como produto, como negócio, deve levar lucro às empresas concessionárias. Começam a dar mais importância aos custos, entendendo que vários aspectos técnicos devem ser analisados, visando reduzir perdas substanciais. Assim sendo, o transformador de potência assume uma posição destacada, considerando sua posição estratégica no sistema elétrico, fundamental no processo de transporte e entrega de energia elétrica. Por este motivo vem despertando o interesse no desenvolvimento de estudos e pesquisas no sentido de aumentar sua vida útil. O método de Análise da Resposta em Frequência da impedância do transformador permite obter a “assinatura” do mesmo, a fim de verificar futuras degradações. Este método é adotado por várias empresas em todo o mundo, há mais de três décadas. Embora sua ampla aplicação entre muitas técnicas utilizadas na monitoração e análise de falhas em equipamentos, até agora não houve consenso na interpretação dos resultados obtidos por este método. A dificuldade de correlacionar parâmetros com prováveis falhas tem suscitado pesquisas para obtenção de resultados confiáveis e de interpretação fácil. Este trabalho objetiva determinar um modelo elétrico que represente a característica da resposta em frequência para fins de armazenamento de dados e simulações. A partir de dados reais do teste de resposta em frequência da impedância inseridos no modelo proposto, através de um programa computacional, foi verificada a confiabilidade nas respostas obtidas, comparadas com as reais. Os resultados obtidos asseguram que o modelo proposto é viável de ser aplicado. / In the new context of the Brazilian electric industry, the electric power provider companies have adopted a new administration posture. The electric power, as a product and business, should make the companies profitable. They have been paying more attention to the costs, .learning that many technical aspects should be analyzed in order to reduce substantial losses. Therefore, the power transformer takes an outstanding position, considering its strategic position in the electric system and being essential in the process of transport and delivery of the electric power. For this reason, there has been an interest in the development of studies and research in order to increase its useful life. The method of Frequency Response Analysis of impedance of the power transformer permits to obtain reference parameters of this one, in order to verify future degradations. This method has been adopted by many companies throughout the world for over three decades. Despite its wide application among several techniques used in the supervision and analysis of faults of equipments, there has been no consensus in the interpretation of the results obtained by this method so far. The difficulty of correlating the parameters with probable faults have increased research in order to obtain reliable results and of easy interpretation. This study aims to determine an electric model that represents the characteristic of the frequency response in order to store data and simulations. Starting from the real data of the FRA test inserted in the proposed model through a computer program, the reliability of the obtained responses were verified and compared with the real data. The obtained results assure that the proposed model is viable and can be applied.

Considering the international scenario, in a recent past, the electrical industry was based on the concepts of monopolistic concessions and vertical utilities structures. In Brazil, until recently, the electricity companies were all governmental properties that served restricted monopolized areas. In a similar manner, in the United States, monopolies for certain concession areas were assigned to vertically integrated electric utilities. This monopolistic portfolio brought to the industry, in a generic sense, a lack in the interface between companies and consumers. This fact established a low capacity of obtaining consumer's information and consequently, a low capacity of developing precise demand forecasts. Lately, the industry of electrical energy around the world has passed through immense structural changes, not only in developed countries, but also in developing countries. In this new environment, competition and private capital are fundamental agents. Now, demand forecasting represents a key factor to support decision-making for planning strategies of electricity utilities. In addition to immediate potential benefits to commercial decisions, a framework for electricity demand forecasting can help to take actions aiming to develop more precise yearly budgets as well as to make accurate investments in the infrastructure expansion. With the objective of improving the supply chain perception of the electricity industry, this work analyzes the electricity industry and develops a mathematical tool to accurately support the decision-making process of electricity utilities. CPFL Energy Co., a holding that controls companies and private enterprises in the generation area, electric power distribution, and trading in Brazil, was chosen as the case of study. CPFL Energy Co.'s supply chain was studied to find out the right explanatory variables and an electricity forecasting mathematical model was created through the stepwise regression procedure.

Orientador: Giovanni Antonio Pinto Alves / Banca: Ricardo Luiz Coltro Antunes / Banca: Ângela Maria Carneiro Araújo / Banca: Marcos Tadeu Del Roio / Banca: Roberto Leme Batista / Resumo: A presente tese teve como objetivo analisar os principais aspectos sociometabólicos que influenciaram na determinação do perfil do jovem trabalhador eletricitário da Companhia Paranaense de Energia. Analisamos como a "nova" morfologia do capitalismo, resultado da recente globalização, reorientou ideologicamente os governos e a sociedade da maioria dos países. Isso levou à constituição de um "novo" metabolismo no ambiente de trabalho, gerando "novas" dimensões e formas de precarização para os trabalhadores. A dinâmica capitalista neoliberal intensificou a manipulação social, impondo culturalmente um comportamento consumista, individualista e competitivo para as novas gerações. Procuramos demonstrar como o incremento tecnológico e o método de gestão toyotista implementado pela empresa a partir do final da década de 1990 alinharam-se com o ideário neoliberal e influenciaram decisivamente na constituição do perfil dos "novos" trabalhadores que se caracterizam principalmente pela competitividade, individualidade, flexibilidade, polivalência, empreendedorismo e proatividade. Além disso, a reestruturação produtiva da empresa impactou negativamente a subjetividade desses novos trabalhadores, precarizando ainda mais suas existencialidades, levando-os a experimentar o estresse, a desesperança, o estranhamento e, por vezes, até o adoecimento físico e/ou psicossocial. / Abstract: The aim of this thesis was to analyze the main socio-metabolic aspects that influenced the determination of the profile of the young electrical worker of Companhia Paranaense de Energia. We analyze how the "new" morphology of capitalism, the result of recent globalization, has ideologically reoriented the governments and society of most countries. This led to the creation of a "new" metabolism in the workplace, generating "new" dimensions and forms of precariousness for workers. Neoliberal capitalist dynamics intensified social manipulation, culturally imposing consumerist behavior, individualistic and competitive for the new generations. We tried to demonstrate how the technological increment and the toyotista management method implemented by the company from the end of the 1990s aligned with the neoliberal ideology and decisively influenced the profile of the "new" workers that are characterized mainly by competitiveness, individuality, flexibility, polyvalence, entrepreneurship and proactivity. In addition, the productive restructuring of the company has negatively impacted the subjectivity of these new workers, making their existentials even more precarious, causing them to experience stress, hopelessness, estrangement, and sometimes even physical and / or psychosocial illness. / Doutor

Thesis (M.A.)--University of Alberta, 2000.

Thesis (doctoral)--Uppsala universitet, 1991. / Includes bibliographical references (p. 168-177).