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- Centro Brasileiro de Pesquisas FísicasBR101 papers
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41 papers · 1 filter
A mild source for the Wu-Yang magnetic monopole
C. P. Constantinidis, L. A. Ferreira, G. Luchini
We establish that the Wu-Yang monopole needs the introduction of a magnetic point source at the origin in order for it to be a solution of the differential and integral equations f…
A Model-Predictive Motion Planner for the IARA Autonomous Car
Vinicius Cardoso, Josias Oliveira, Thomas Teixeira +5
We present the Model-Predictive Motion Planner (MPMP) of the Intelligent Autonomous Robotic Automobile (IARA). IARA is a fully autonomous car that uses a path planner to compute a…
Ranking of classification algorithms in terms of mean-standard deviation using A-TOPSIS
Andre G. C. Pacheco, Renato A. Krohling
In classification problems when multiples algorithms are applied to different benchmarks a difficult issue arises, i.e., how can we rank the algorithms? In machine learning it is c…
Solar System constraints on Renormalization Group extended General Relativity: The PPN and Laplace-Runge-Lenz analyses with the external potential effect
Davi C. Rodrigues, Sebastião Mauro, Álefe O. F. de Almeida
General Relativity extensions based on Renormalization Group effects are motivated by a known physical principle and constitute a class of extended gravity theories that have some…
Primordial Universe with radiation and Bose-Einstein condensate
F. G. Alvarenga, L. G. Ferreira Filho, R. Fracalossi +5
In this work we derive a scenario {in which} the early universe consists of {radiation fluid} and Bose-Einstein condensate. The possibility of gravitational self-interaction due to…
Dynamics of a perfect fluid through velocity potentials with aplication in quantum cosmology
F. G. Alvarenga, R. Fracalossi, R. G. Furtado +1
We review the Eulerian description of hidrodynamics using Seliger-Whitham's formalism (in classical case) and Schutz's formalism (in relativistic case). In these formalisms, the ve…