Search Results - "Afonso, Márcio M."

Evaluation of the impact of different frequency dependent soil models on lightning overvoltages by Schroeder, Marco Aurélio O., de Barros, Maria Teresa Correia, Lima, Antonio C.S., Afonso, Márcio M., Moura, Rodolfo A.R.

“…•Wideband behaviour of grounding systems in EMT-type programs on evaluation of lightning transients.•Grounding frequency behaviour by electromagnetic model and…”
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A Finite-Element Approach for Electric Field Computation at the Surface of Overhead Transmission Line Conductors by Farah, Arthur A. M., Afonso, Marcio M., Vasconcelos, Joao A., Schroeder, Marco A. O.

“…The purpose of this paper is to introduce a modified approach for the electric field computation at the surface of overhead transmission line (TL) conductors…”
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Optimization of Overhead Transmission Lines Power Transfer Capability with Minimizing Electric and Magnetic Fields by Moura, Rodolfo A. R., Assis, Fernando A., Schroeder, Marco Aurélio O., Resende, Leonidas C., Afonso, Márcio M.

“…The electric and magnetic fields generated by transmission lines, at ground level, must be carefully analyzed to ensure low levels of induced voltage in…”
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Periodic Boundary Conditions in the Natural Element Method by Goncalves, Barbara M. F., Afonso, Marcio M., Coppoli, Eduardo H. R., Schroeder, Marco Aurelio O., Alipio, Rafael S., Ramdane, Brahim, Marechal, Yves

“…The purpose of this paper is to introduce periodic and antiperiodic boundary conditions in the natural element method (NEM). It is shown that as the NEM shape…”
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Voltage Distribution Along Earth Grounding Grids Subjected to Lightning Currents by Alipio, Rafael, Aurelio O. Schroeder, Marco, Afonso, Marcio M.

“…This paper applies a rigorous electromagnetic model to determine the transient distribution of potentials along a substation earth grounding grid subjected to…”
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Performance analysis of the ultra weak variational formulation to compute electromagnetic fields on nonuniform meshes by Gimpel, Alfred, Silva, Elson J., Afonso, Marcio M.

“…The purpose of this work is to apply a previously developed ultra weak variational formulation (UWVF) to the solution of the Helmholtz equation in…”
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Evaluation of Singular Integral Equation in MoM Analysis of Arbitrary Thin Wire Structures by Resende, Ursula C., Moreira, Maicon V., Afonso, Marcio M.

“…In this paper, a new simple and efficient numerical procedure is presented for evaluating electric field singular integral equations found in the method of…”
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Analysis of element free Galerkin interloping moving least square method in an electrostatic problem by Resende, Úrsula C., Coppoli, Eduardo H. R., Afonso, Marcio M., Gonçalves, Sandro T. M.

“…ABSTRACT The element free Galerkin (EFG) meshless method is very effective for solving electrostatic problems. However, it leads to shape functions which do…”
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Improving the geometry of a microstrip antenna for UWB signals through FDTD-CPML method and construction with fiberglass FR4 by Goncalves, Sandro T. M., Tomaz, Luciano M., Milagre, Ludmila R., do C Resende, Ursula, Afonso, Marcio M., Vollaire, Christian

“…The Ultra Wideband (UWB) technology is a promising way to integrate data communications over short distances and at higher data rates. It is known that the…”
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Transient response of grounding electrodes for the frequency-dependence of soil parameters by Pedrosa, A G, Shroeder, Marco Aurélio O, Afonso, Márcio M, Alípio, Rafael S, de Castro Assis, Sandro, Oliveira, Tarcísio A S, Braga, Anísio R

“…This study evaluates the response of a horizontal grounding electrode against impulsive currents whose waveforms and time front is typical of lightning. The…”
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Decision Making in Transmission Line Multiobjective Optimization with SMARTS by Resende, Paula C., Afonso, Marcio M., Schroeder, Marco A. O.

“…In this paper, the a posteriori decision making method SMARTS is used to choose the best solution of the nondominated front previously met by optimization…”
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Hybrid natural element - Boundary element method applied to solve electromagnetic scattering problem by Afonso, Marcio M., Vasconcelos, Joao A., Mesquita, Renato C., Ramdane, Brahim, Marechal, Yves, Vollaire, Christian, Krahenbuhl, Laurent

“…In this paper the coupling of natural element method with the boundary element method (Hybrid NEM - BEM method) is proposed to solve the electromagnetic…”
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Assessment of a frequency dependent soil model impact on lightning overvoltages by Schroeder, Marco A. O., Correia de Barros, Maria Teresa, Lima, Antonio C. S., Afonso, Marcio M., Moura, Rodolfo A. R., Assis, Sandro C.

“…A key aspect in the evaluation of the lightning performance of an overhead line is the tower grounding modeling approach. It affects the insulator string…”
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The natural element method applied to solve an electrical machine problem by Goncalves, Barbara M. F., Afonso, Marcio M., Coppoli, Eduardo H. R., Schroeder, Marco Aurelio O., Alipio, Rafael S., Ramdane, Brahim, Marechal, Yves

“…In this paper, the Constrained Natural Element Method (C-NEM) is used to determine the magnetic flux distribution in an electrical machine. Due the use of…”
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Approximated raising of the curvature of a double-ridged waveguide horn antenna in a computational model by Santos Henrique, Claudio H.G., Afonso, Marcio M., Alipio, Rafael S., Resende, Ursula C., Schroeder, Marco Aurelio O., Lopes Santos, Leonardo Alvarenga

“…In this paper the curvature and the shape of the double ridged horn antennas is studied in its computational modeling, whose application is very significant…”
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Simulation of automotive vehicles EMC Experiment Considering nearness to an anechoic wall by Santos, C.H.G., Afonso, M.M., Resende, U.C.

“…In this work is presented some of the results of recent study about automotive vehicles EMC experiments. Some important features about the simulation…”
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Calculation of the electromagnetic field irradiated by linear antennas considering the soil resistivity influence by Arruda, F.O.M., Eller, W.L.G., Schroeder, M.A.O., Afonso, M.M., Oliveira, T.A.S.

“…One of the main tools of the study of electromagnetic compatibility is the antenna. It is used due to its capacity for irradiating electromagnetic waves in…”
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Relative importance of the Surface Waves in the Electromagnetic Field Radiated by Linear Antennas by Eller, W.L.G., Arruda, F.O.M., Schroeder, M.A.O., Afonso, M.M., Oliveira, T.A.S., Rabbello, A.A.

“…In this paper, the field radiated by a linear antenna was calculated considering the soil influence by means of complex images. The surface waves contributions…”
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Parallel association of rectennas for electromagnetic energy harvesting by Brandao, Guilherme L. F., Resende, Ursula C., Bicalho, Fabiano S., Almeida, Gabriel A. T., Afonso, Marcio M.

“…Rectennas operating as microwave electromagnetic energy harvesting systems has a low input power and, as a result, a very low output power is delivered to the…”
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