Análise crítica da operação radial dos sistemas de distribuição de energia elétrica

Pós-graduação em Engenharia Elétrica - FEIS

Reconfiguração de sistemas de distribuição utilizando metaheurísticas e critérios de confiabilidade

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.

Alunos, professores e bibliotecários: uma rede a ser construída

The article examines, initially, data from research on reading for teachers and school libraries in the Western Paulista completed in 2009. Then addresses the structural problems which prevent the effective functioning of libraries, including the disregard for the role of the school librarian, despite recent legal devices, important but ambiguous. Subsequently, it proposes reconfiguration of the library concept and its organization with the incorporation of the computer room, now it apart and greater structural and financial contribution. Finally, the writer believes it would be necessary to review, beyond the concept of the library, the teaching of the act of reading to understand it as a cultural act to be appropriated by the younger generations within the schools and their renewed libraries with the indispensable librarian.

Projeto e desenvolvimento de robô cartesiano de baixo custo para manipulação de produtos em linhas de média cadência

Pós-graduação em Engenharia Elétrica - FEB

Novas responsabilidades para o professor na educação básica

The goal of this study was to identify some of the new responsibilities that have been assigned to the elementary school teachers , under the mediation of continuing education courses . We start from the idea that these courses , especially those offered by the SECADI, are proposed teachers and aims to train them for a performance at school that exceeds the activity of teaching in the classroom . The teacher has been summoned to attend these courses in which is prepared to act on school performing tasks rather related to the care of students than teaching , assisting them in their basic needs such as health, protection, inclusion and human rights. Asked ourselves if there was a reconfiguration of the responsibilities of education professionals in order to make use of oneself given by the State. We chose as sources of research documents the SECADI such as legislation , manuals and instructional materials that will proceed to the analysis , in each course , the target populations privileged , purpose, remuneration and certification , pre - requirements to participate in the courses and duration ; partnerships involved if the courses are face , semi-distance or distance ; activities that teacher should develop in school after completion of the courses ; loads hourly . We will seek to analyze the documents and materials of School programs that Protects, School Health Program , Network Education for Diversity. The theoretical and methodological framework is dialectical and historical materialism, from assumptions which we choose as the class character of society in capitalism and alienation as a phenomenon that affects the work in all its manifestations . Thus , our general hypothesis is that the enrichment tasks of teachers in public schools can contribute to basic disposition Teacher education

Procedimentos para análise de lucratividade de produtos no setor de autopeças metálicas

In a globalized world, organizations face an increasingly dynamic, innovative and competitive environment, so that this condition requires continuous adaptation to market developments. Intense competition requires organizations to further improve their performance, making productive efficiency a key factor for survival. A methodology that has added value to the product through a reconfiguration of the production method is the implementation of a management philosophy called Lean Six Sigma. The main objective of this work is, in the light of the Lean Six Sigma philosophy, intervene in a critical-collaborative way to develop procedures for analyzing the profitability of products in a company specializing in steel processing. To achieve this goal, were applied the method of action-research to intervene in a group of professionals for the study of the profitability of products in a auto parts industry. The interaction of practical and theoretical knowledge provided by the action-research allowed the business program was enhanced. The procedures proposed in this study were able to identify the current profitability of the product, the main causes of inefficiency and productive for solutions to reduce production inefficiencies, when the productive systems planned and actual production system were compared. The results indicate that current profitability of -3%, while the parameter provided during budget was 10%. Thus, it is concluded that the low profitability of the products may compromise the company's financial results and affect their competitiveness in the market. To address this problem, the Lean Six Sigma presents itself as a versatile and high applicability philosophy, providing relevant results for characterization and troubleshooting. It was also observed that the evidence presented in this paper can be adapted to other companies in the metal auto parts segment to identify and recover the profitability of products

Da serra à costa: migração e modernização peruana na obra de Mario Vargas Llosa (1950-1960)

Pós-graduação em História - FCHS

Implementação do REUNI na UTFPR e as particularidades do câmpus de Medianeira

Pós-graduação em Educação - FFC

O relógio do Rosário anuncia A máquina do mundo: Haroldo de Campos relê Drummond

Considering fragments of the haroldian poem A Máquina do Mundo Repensada, this paper approximates Drummond and Haroldo de Campos. In this poem, the poetic person’s unquietness conducts him to very peculiar displacements: the one that concerns to the end of millennium, marked by the utopia’s collapse, by the subjectivity fragmentation, by the frontiers’ reconfiguration between people and places. Assuming what the drummondian fatigued eyes have seen, the poet Haroldo de Campos will (re)think his world disharmony

Propostas de modelagem matemática para o problema de restauração de sistemas de distribuição de energia elétrica radiais

Pós-graduação em Engenharia Elétrica - FEIS

A política como incômodo

This article holds that the dominant scene of the “crisis of politics” in modern societies reflects a complex process of reconfiguration of social life and way of living. Through critical dialogue with some representatives of political sociology of radicalized modernity, it suggests that current failure of politics is the failure of one way of doing and thinking about politics, direct heir of “historical capitalism”. It is not the failure of politics as such, but of a mode of politics, political system, political practice. It must be associated with a sort of fatigue of the material which composed modern politics, which has always been based on strong national and constitutional states, on mass parties and active parliaments, as well as on the efficient functioning of representative democracies.

Reconfiguração de sistemas de distribuição operando em vários níveis de demanda através de uma meta-heurística de busca em vizinhança variável

Pós-graduação em Engenharia Elétrica - FEIS

Otimização de sistemas de distribuição de energia elétrica radiais usando programação cônica de segunda ordem inteira mista

Pós-graduação em Engenharia Elétrica - FEIS

Educação, ética e experiência na contemporaneidade

The objetive of this paper is discuss, briefly, how are configured the dimensions of experience and ethics in society called "liquid" - from the discussions conducted by Zygmunt Bauman. It is observed that there is a difficulty of construction and maintenance of human relations which also leads to impoverishment of experience. This condition is related to the conexion of the bonds with the logic of consumption, which favors the ephemerality, disposability and transforming the other into an object of satisfaction. As a result, a new ethic becomes necessary, being guided in the rediscovery of public spaces as places of exchange (for exemple, the school institution), the experience with the other recognized as an autonomous subject and the reconfiguration of social ties from a policy of friendship.

Otimização da operação de sistemas de distribuição radiais usando um algoritmo genético especializado

Pós-graduação em Engenharia Elétrica - FEIS