VI CIC. UFCG - Artigos - Engenharias e Ciências Exatas: Recent submissions

  • Estudos para modelagem termomecânica de atuadores de ligas com memória de forma. 
    OLIVEIRA, Henrique Martini Ramos de.; BEZERRA FILHO, Celso Rosendo. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    This work has for purpose to study tools capable of modeling thermomechanically shape memory alloys actuators. Using the first and the second law of thermodynamic and the Clausius-Clapeyron equation it was determined, ...
  • Análise de desempenho de um motor de combustão interna operando de forma dual (diesel+gás natural). 
    SILVA, Bruno Ferreira.; COSTA, Yoge Jerônimo Ramos da. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    This study aimed to analyze the performance of a diesel cycle engine installed in the Thermal generation laboratory of the UFCG, when it is put to work in dual form, using diesel fuel and natural gas while, since this ...
  • Sistema de aquisição de dados para acompanhamento de recém-nascidos prematuros. 
    FREITAS, Renato Andrade.; SILVA, Roniere Francisco Lima da.; FREIRE, Raimundo Carlos Silvério. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    This paper describes the design and development of a system dedicated to monitor and control the functionality of an incubator. It does so through a dedicated hardware and a set of program modules developed to monitor ...
  • Uso da ferramenta Psim para simulação de filtros ativos de potência. 
    ROCHA, Adi Neves.; JACOBINA, Cursino Brandão.; SANTOS JÚNIOR, Euzeli Cipriano dos. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    In this work has been studied the use Psim software in active power filters, especially for single-phase to three-phase conversion. The implementation has been done in closed-loop, with controllers: PI and modified PI. ...
  • Planejamento de sistemas de distribuição. 
    BATISTA, Maria Letícia Nóbrega.; BRITO, Núbia Silva Dantas. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    The electric energy is fundamental resource to the development of society. Considering such importance, the energy sector is envolved in constant search of its improvement. In this context, the sector of distribution of ...
  • Processamento digital de sinais aplicado a detecção automática da modulação em rádio definido por software. 
    MENEZES, Alysson Vasconcelos Gomes de.; GURJÃO, Edmar Candeia. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    In this work it was implemented a software radio to automatically identify the modulation type of a signal received by its antenna. Using an USRP (Universal Software Radio Peripheral), we received signals from AM and FM ...
  • Redes de adaptação de impedância para antenas integradas ativas planares. 
    MAIA, Ayslan Caisson Norões.; FONTGALLAND, Glauco. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    This work had the goal of designing active antennas and impedance adaptation circuits, both operating at the frequency of 2.45 GHz. A very important point to be taken into consideration is the fact that the adaptation ...
  • Perdas em conversores CA-CA monofásico para trifásico a quatro fios. 
    CARLOS, Gregory Arthur de Almeida.; JACOBINA, Cursino Brandão.; SANTOS JUNIOR, Euzeli Cipriano dos. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    This paper aims to study the losses in switches of three types of ac-ac converter, with focus on minimized component structures. The proposed topologies allow single-phase to three-phase electrical system power conversion ...
  • Pêndulo magnético parametricamente forçado. 
    BATISTA, Adriano Albuquerque.; OLIVEIRA, Edmar Pinto de. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    In this article we experimentally study the dynamic behavior of an axially magnetized magnet, which is free to rotate horizontally, in the presence of a uniform magnetic field that varies periodically in time. We verify ...
  • Mapeamento de campo elétrico em isoladores poliméricos. 
    VILAR, Pablo Bezerra.; COSTA, Edson Guedes da. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    This study aimed to carry out a mapping of temperature in 15 kV polymeric insulators, used in distribution power systems. The insulator in ideal conditions was simulated, as well as a situation with internal voids with ...
  • Operação de transformadores em regime de sobreexcitação. 
    BRITO, Fábio Diogo da Silva.; GUERRA, Francisco das Chagas Fernandes. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    This work had the objective of determining the characteristics of a magnetic core of a single processor, and determine their losses, the bonds of hysteresis for different levels of excitation and spectral presentation ...
  • Indexação e recuperação de conteúdo em imagens. 
    SOUZA, Sérgio Paulo Melo do.; CARVALHO, João Marques de. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    This project aims to index and retrieve information in multimedia documents, based on the automatic analysis (processing, extraction of features and classification) and sharing of media specific information. We consider, ...
  • Investigação de métodos de medição de permissividade elétrica de placas de circuito impresso. 
    MELO, Victor Felipe Moura Bezerra.; D’ASSUNÇÃO JÚNIOR, Adaildo.; FONTGALLAND, Glauco. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    In this work it is proposed new configurations of the ring resonator to measure, with greater accuracy, the permittivity of dielectric materials used in the design of printed circuit boards that operate at high frequencies. ...
  • Viscosidades aparentes de polpas concentradas de manga espada. 
    BRITO, Taise Câmara.; QUEIROZ, Alexandre José de Melo.; FIGUEIRÊDO, Rossana Maria Feitosa de.; FERNANDES, Tâmila Kassimura da Silva. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    Apparent viscosities of sword mango pulp in 25 and 30ºBrix concentrations at 10, 20, 30, 40, 50 and 60o C was determined. The pulps were extracted of mangos in half ripe state and submitted to concentration in rotative ...
  • Análise e identificação de falta no comando de interruptores de conversores usando Wavelet. 
    ANDRADE, Abinadabe Silva.; OLIVEIRA, Talvanes Meneses. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    Wavelet Transform (WT) has been attracting interest in applications of the electric signs analysis, in contrast with the methodology classic for determination of the spectrum signs during transient or no stationary signs ...
  • Desenvolvimento de conversores estáticos não isolados para sistemas fotovoltaicos. 
    NÓBREGA, Vágner Fonsêca.; CORRÊA, Maurício Beltrão de Rossiter. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    The aim of this paper is to evaluate a power delivery control method for photovoltaic applications that use multilevel inverters. The method is based on vector PWM and allows to selected vectors in a way to control the ...
  • Conversor estático CA/CC/CA para aplicações em sistemas trifásicos. 
    MENDONÇA, Yorkismar de Andrade.; JACOBINA, Cursino Brandão. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    This work aims to simulate a AC/DC/AC static converter for three-phase applications. The converter is used to generate output three-phase voltages different of the input ones. The output of the converter is filtered by ...
  • Análise do comportamento de transformadores de potencial capacitivos frente a sobretensões transitórias em sistemas elétricos de potência. 
    SANTOS, Alana Kelly Xavier.; FERNANDES JÚNIOR, Damásio. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    In this work, the goal is to use an accurate Coupling Capacitor Voltage Transformer (CCVT) model to analyse the dynamic behavior of the equipment when submitted to some kinds of transient phenomena in power systems. The ...
  • Sinterização via energia de microondas de nanoferritas Ni-Zn para desenvolvimento de dispositivos magnéticos moles. 
    DINIZ, Verônica Cristhina de Souza.; VIEIRA, Débora Albuquerque.; SOUSA, Jean-Pierre La Martini Lima.; COSTA, Ana Cristina Figueiredo Melo.; VIEIRA, Luciana da Gama Fernandes. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    This work aims to prepare nanostructures of Ni-Zn ferrites sintered using the energy of microwave oven. These materials will have their performance evaluated for use in soft magnetic devices for high frequency to minimize ...
  • Prevalência de silicose em trabalhadores de pedreiras na Zona Urbana II de Pedra Lavrada, PB nos últimos cinco anos - Prevalência de silicose em trabalhadores de pedreiras de Pedra Lavrada, PB nos últimos cinco anos. 
    GOMES, Livia Mirella Martins.; NAVARRO, Rômulo Feitosa.; DANTAS, Deborah Rose Galvão. (BrasilUFCGUniversidade Federal de Campina Grande, 2009)
    The silicosis is well known in various branches of economic activities such as mining, ceramic industry, metallurgical industry, quarries, heavy construction and blasting of sand. It is the oldest occupational disease and ...

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