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Campina Grande, Brazil

The Federal University of Campina Grande is a public university whose main campus is located in the city of Campina Grande, Paraíba, Brazil. Together with the Federal University of Paraíba, it is the main university of the state of Paraiba, Brazil. Established after splitting from UFPB in 2002, it is one of the leading technological and scientific production institutes of northeastern Brazil, being mentioned in a 2001 edition of the Newsweek magazine as a technopole - among 9 other around the world - that represents a new vision for technology. It was again quoted in 2003 as the Brazilian silicon valley. Wikipedia.

De Macedo Braz H.D.,Companhia Hidro Eletrica Do Sao Francisco | De Souza B.A.,Federal University of Campina Grande
IEEE Transactions on Power Systems | Year: 2011

This paper deals with radial distribution network reconfiguration for loss and switching mitigation. Its main contribution is the presentation of a genetic algorithm (GA) with two network encodings, capable of representing only radial connected solutions without demanding a planar topology or any specific genetic operator. The code was named sequential because the evaluation of the ith gene depends on the information forthcoming from all the previous genes. In addition to a full description of proposed techniques with examples, the paper presents a survey of existing network codifications including their search space and chromosomes for a 33-bus example system. In order to validate the proposed algorithms, these and other two techniques in the state of the art are applied to reconfigure three sample systems which have been broadly published in the technical literature. Performance is assessed by using the results of implemented representations and the reconfiguration literature. © 2010 IEEE. Source

Cogollo D.,Federal University of Campina Grande
International Journal of Modern Physics A | Year: 2015

We study the muon anomalous magnetic moment in an electroweak model based on the gauge symmetry SU(4)L ⊗ U(1)N, which has right-handed neutrinos in its spectrum, and no flavor changing neutral currents at tree level. We discuss relevant collider and electroweak constraints on the model, and derive the most stringent upper bounds on the scale of symmetry breaking based on the corrections to the muon magnetic moment. We conclude that a scale of symmetry breaking of around 2 TeV might explain the muon magnetic moment anomaly. In case the anomaly is otherwise resolved, using the current and projected sensitive of g-2 experiments, we rule out scales of symmetry breaking smaller than 3.5 TeV (5.5 TeV) at 1σ level. © 2015 World Scientific Publishing Company. Source

Cogollo D.,Federal University of Campina Grande
International Journal of Modern Physics A | Year: 2015

In light of the ongoing effort on reducing the theoretical uncertainties and an upcoming experiment concerning muon magnetic moment, we perform a detailed study of an 3-4-1 electroweak gauge extension of the standard model that contains exotic charged leptons in its spectrum. We discuss flavor changing neutral current, collider and electroweak bounds on the model and derive 1 σ limits using current and projected limits on the muon magnetic moment. In summary, we exclude the masses of new gauge bosons that couple to muons and heavy charged leptons up to 700 GeV. Moreover, we find a projected lower bound on the scale of symmetry breaking to be 2 TeV. © 2015 World Scientific Publishing Company. Source

Dos Santos E.C.,Federal University of Campina Grande | Jacobina C.B.,University of Paraiba
IEEE Industrial Electronics Magazine | Year: 2011

In power electronics, pulsewidth modulation (PWM) has been the subject of intensive research and is widely employed to control the output voltage of static power converters. © IEEE. Source

Anacleto M.A.,Federal University of Campina Grande
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2015

In this paper, using a (2+1)-dimensional field theory approach, we study the Aharonov-Bohm (AB) scattering with Lorentz symmetry breaking. We obtain the modified scattering amplitude to the AB effect due to the small Lorentz violation correction in the breaking parameter and prove that up to one loop the model is free from ultraviolet divergences. © 2015 American Physical Society. Source

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