Dissertações: Recent submissions

  • TANGERINO, Laiza Maria Borges (Universidade Federal de ItajubáBrasilIFQ - Instituto de Física e QuímicaPrograma de Pós-Graduação: Mestrado - Materiais para EngenhariaUNIFEI, 2006-11-07)
    The main objective of this work was to develop and to test a novel biologically active polymer based on macroporous PCL-co-Eugenol copolymers with potential for use in medicine. The antimicrobial element in the copolymer ...
  • FONSECA, Eduardo Cerqueira da; http://lattes.cnpq.br/4640347173967335 (Universidade Federal de ItajubáBrasilIEPG - Instituto de Engenharia de Produção e GestãoPrograma de Pós-Graduação: Mestrado - Engenharia de ProduçãoUNIFEI, 2006-05-18)
    The machining can be considered a great process in the industry. Its development accompanied the evolution of the production engineering and product engineering. In consequence new tools and new machines were created. ...
  • JUNIOR, Helton Hugo de Carvalho (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-11-27)
    This work has as objective the implementation and the use of intelligent methods for navigation and obstacles avoidance, being based on a simulator previously constructed, which is the initial point for the creation ...
  • JIMENEZ, Ruth Katiuska Granja; 999 999 999 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Mestrado - Engenharia MecânicaUNIFEI, 2004-09-15)
    This work presents a methodology for the performance prediction of Francis turbine based on mean streamline analysis. The performance prediction takes into account only the overall dimensions of the Francis turbine and ...
  • SANTOS, Carlos Eduardo dos (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-12-14)
    A fundamental procedure to guarantee the energy quality in electric systems is the tension regulation. However, it is not a trivial activity due to the great number of state variations that an electric system is ...
  • ANTUNES, Flávia (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-05-23)
    In the last few years, the growth of the academic production about non-linear dynamic systems was noticed. Although the researches evolved, there are still topics that deserve a close analysis. One of them includes the ...
  • VIOLATO, Marcelo Oliveira; http://lattes.cnpq.br/3515559809712518 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Mestrado - Engenharia MecânicaUNIFEI, 2004-07-30)
    Este trabalho apresenta uma formulação para o escoamento potencial e incompressível em rotores centrífugos de turbomáquinas contendo um conjunto de pás auxiliares consideradas de espessura infinitamente fina. A formulação ...
  • RAMOS, Filipe Guimarães Russo; http://lattes.cnpq.br/2070762094846584 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-02-12)
    Modern Application Specific Integrated Circuits - ASICs are systems frequently composed by mixed-signal blocks, consisting of analog and digital circuitry. The analog blocks, in particular, need to be biased by voltage ...
  • NOVAES, Eder Garcia Caetano; http://lattes.cnpq.br/5375055172473745 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-03-16)
    This work introduces a validation of voltage sag simulation tools based on measurements obtained from the power system of a regional Brazilian utility. The measurements were extracted during 6 months using a Power ...
  • SILVA, Jussara Antunes da (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Mestrado - Engenharia de EnergiaUNIFEI, 2006-12-14)
    Recently, the discussion of new paradigms economical, social and you adapt it has been provoking important alterations in the perspectives and forms of implantation of new hydroelectric projects in the country. In this ...
  • CORRÊA JÚNIOR, Paulo Sérgio Pedroso; http://lattes.cnpq.br/8607617872091635 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Mestrado - Engenharia MecânicaUNIFEI, 2006-11-13)
    Several research centers have been carrying out studies regarding the use of biodiesel in internal combustion engines and the great potential of this fuel has been confirmed. However there is scarce information on the ...
  • SILVEIRA, Eben-Ezer Prates da; http://lattes.cnpq.br/1614978364658349 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2005-01-06)
    The aim of this work is to show a start-up and control system to synchronous machines. Using two six thyristors converter bridges, one is operating as rectifier and the other one as inverter with natural commutation, ...
  • OLIVEIRA, Thiago Mikail de; http://lattes.cnpq.br/3763949136159677 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-12-14)
    This work presents aspects of predictive maintenance of Direct Current Motors, with special focus on the technique of MCSA - Motor Current Signature Analysis, originally developed for the application in Three-phase ...
  • MACIEL FILHO, José; http://lattes.cnpq.br/4838254065611272 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2006-07-07)
    This document concerns about the voltage stability phenomenon, which have been a growing interesting issue during the last years. Economics and ecological restrictions are causing an operation of several electrical systems ...
  • LUGLI, Alexandre Baratella; http://lattes.cnpq.br/5881767597296521 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-10-17)
    The standard protocol TCP/IP is one of the most wild spread architectures for long, average and short distances involving computers. So, for trying the industrial networks standardization, there are some years, it was ...
  • GARCIA, Marco Aurélio Raphul Azevedo; http://lattes.cnpq.br/8764457950981380 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2006-11-25)
    There are three forms of a hidroelectric system to self-protect by hydrological and load risks: the first one is the water storage; the second is the complementarities thermal; the third is the increase of the elasticity ...
  • DALLOCCHIO, Nelson (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-09-28)
    The use of advanced hardware and digital computers in electrical management systems potentially enhance the supervision and control tasks in real time operation mode. These functions allow the safe operation of electrical ...
  • PEREIRA, Dejanir Ricardo; http://lattes.cnpq.br/4257015507636069 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-08-31)
    This work presents the development and application of a software system for coordination and selectivity protection studies in overhead distribution power systems. It is emphasized that this software was developed as ...
  • SILVA NETTO, Roberto; http://lattes.cnpq.br/3751634633048511 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2006-12-18)
    The number of cyber attack is growing up more and more, because, the tools of invasion is become more widely e easy to find and the vulnerabilities take a long time to be corrected. For all this, the Intrusion Detection ...
  • CARNEIRO, William Alves; http://lattes.cnpq.br/5580607960086202 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-06-06)
    This dissertation describes in a simplified manner, the composing elements of a thermal power plant, which operates in combined cycle and deals with its working principles, types and specific characteristics. In this ...