Dissertações: Recent submissions

  • MONIZ, Octávio Vieira (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-09-10)
    The transformer is a very important equipment inside of the context of an electrical power system. It makes possible the electric energy supply. The useful life technique of a transformer depends on its efficiency, its ...
  • BACHEGA, Renata Jacyszyn (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2006-09-19)
    Nowadays, in power systems, the concept of reliability is getting more and more importance. Therefore, it is a tough task to take any equipment out of operation to carry out some tests in order to know its behavior ...
  • FERREIRA, Isaac Caldas; http://lattes.cnpq.br/4719959810078299 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Ciência e Tecnologia da ComputaçãoUNIFEI, 2018-06-15)
    In this work, we present the development of an Open Source Anti-Spam System (SASCA) in Java. Unlike commercial anti-spam systems, SASCA does not make use of block lists (black / white), but rather of m machine learning ...
  • SILVA, Vanusa de Souza Vilela; http://lattes.cnpq.br/5635535032247055 (Universidade Federal de ItajubáBrasilIFQ - Instituto de Física e QuímicaPrograma de Pós-Graduação: Mestrado - Ciência e Engenharia de MateriaisUNIFEI, 2009-11-27)
    Epoxy resins are thermosetting polymers that cure when mixed with a catalyzing agent or "hardener”. The epoxy network formation is strongly dependent of the stoichiometry ratio between the functional groups of the epoxy ...
  • SOUZA, João José de; http://lattes.cnpq.br/1624402095512504 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Mestrado - Engenharia MecânicaUNIFEI, 2006-10-02)
    In this work healthy were accomplished studies of Heat Transfer problems embracing forced, natural and mixed convection. We studied 4 cases and 3 distinct rectangular cavities geometrical with distinct rates. In case 1: ...
  • SILVA, Dagoberto Cássio da; http://lattes.cnpq.br/6462684377051193 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Mestrado - Engenharia MecânicaUNIFEI, 2004-11-17)
    The main goal of this work is the application of the thermoeconomics concepts according to the methodology proposed by Theory of Exergetic Cost in a preliminary study of a great load thermal unit. It is about of a ...
  • SOUZA, Helder José Celani de (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2003-04-24)
    The magnetic levitation, also known as magnetic suspension and abreviated by Maglev, is a result of the magnetic attraction, repulsion and forces equilibrium physical principles apllied to a determined object in the ...
  • LIMA, Luana Medeiros Marangon; http://lattes.cnpq.br/7482797265293559 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-04-20)
    After eight years of the restructuring process, it is possible to analyze the current stage of the Brazilian electrical sector. The way how transmission was structured to introduce competition on the generation and ...
  • ALMEIDA, Fabiano Ribeiro do Vale; http://lattes.cnpq.br/5727027464065807 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Mestrado - Engenharia MecânicaUNIFEI, 2003-10-31)
    The main objective of this dissertation is to study self-excited vibrations, applied in rolls of paper machines, lathes and mainly in a ventilation system. The study also contains a model of a self-excited fluid, that ...
  • QUEIROZ, Anderson Rodrigo de; http://lattes.cnpq.br/4336239163436184 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-04-20)
    The introduction of competition on the electricity sector has turned the electricity price the most important variable in the energy market. On this way, efficient estimating methods of spot prices have became crucial to ...
  • MAGINA, Flávio de Carvalho (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-07-30)
    The electric power transmission lines consist in one of the most important components of the electrical system and its vulnerability to the meteorological phenomena is a determinative factor in its design and operation. ...
  • CARVALHO, Humberto Figueiredo de (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-06-21)
    The Ethernet technology from enterprise level forced the evolution of other fieldbuses in the factory ground. Therefore, several manufacturers nowadays present different Ethernet solutions now called Industrial Ethernet. ...
  • MURAT, Júlio César Mendes; http://lattes.cnpq.br/3617080115725376 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Mestrado - Engenharia MecânicaUNIFEI, 2003-12-05)
    In this work, the numerical simulation of two-dimensional incompressible turbulent flow, through a circular pipe using the control volume method is presented. For the flow, one turbulence model is tested: the Algebraic ...
  • BRAGA, Alexandre Viana; http://lattes.cnpq.br/4001258943995328 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Mestrado - Engenharia de EnergiaUNIFEI, 2002-12-16)
    The aim of this dissertation is the development of an induction generator voltage control system, regardless of the machine load. The method consists basically of using fixed capacitors, associated with TCR’s (Thyristor ...
  • MAZZA JUNIOR, Miguel (Universidade Federal de ItajubáBrasilIEPG - Instituto de Engenharia de Produção e GestãoPrograma de Pós-Graduação: Mestrado - Engenharia de ProduçãoUNIFEI, 2004-03-09)
    The main point of this research have to rise the necessary parameters to study the economical possibility of smart card use in financial institutions, for that all the consequences were analysed in order to decrease ...
  • MATTAR, Caroline Monteiro; http://lattes.cnpq.br/0436548995343708 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-04-27)
    Over the past decade, electric power systems have been restructured based on different models to introduce competition among market participants. Transmission open access for suppliers and customers is one of the most ...
  • MIRANDA, Kelly de Pinho Miranda (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2003-11-07)
    This work presents the project of a device with a low cost to measure the bit error rate in data communications systems. Through the detention of the errors occurred during the transmission of the data in a certain ...
  • OLIVEIRA, Alexandre Magno Galieta de; http://lattes.cnpq.br/4472315618639582 (Universidade Federal de ItajubáBrasilIEPG - Instituto de Engenharia de Produção e GestãoPrograma de Pós-Graduação: Mestrado - Engenharia de ProduçãoUNIFEI, 2003-06-18)
    This study intends to investigate the use of financing tools and techniques that are used by the industries “Electronic Valley”, which comprises the city of Santa Rita do Sapucaí. It also intends to compare and verify ...
  • OLIVEIRA JUNIOR, Jacy; http://lattes.cnpq.br/1359806933233030 (Universidade Federal de ItajubáBrasilIEPG - Instituto de Engenharia de Produção e GestãoPrograma de Pós-Graduação: Mestrado - Engenharia de ProduçãoUNIFEI, 2003-09-10)
    At the present competitive environment, the anesthesiology should manage his clinic as a supply service organization. This work presents a model of the quality valuation of the anesthesiology service, which uses the ...
  • DE VIDIGAL, Michael Charles Andrew Curado Fleury; http://lattes.cnpq.br/4087189661400095 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2007-07-06)
    When multiple agents with different characteristics are considered to solve a set of problems, it is very challenging to specify the number of agents, the specific function of each one to be used, and the schedule of ...