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Mostrando ítems 21-30 de 202
Campos Eletromagnéticos produzidos por descargas atmosféricas: uma abordagem analítica no domínio do tempo.
(Universidade Federal de Minas GeraisUFMG, 2009-05-07)
This work develops a set of time-domain analytical equations which allows the calculation of the electromagnetic fields produced by lightning discharges. A revision of the treatment of this subject in the technical literature ...
On the existence and uniqueness of solutions to Maxwell's equations in bounded domains with application to magnetotellurics
(World Scientific, 2000-02)
We analyze the solution of the time-harmonic Maxwell equations with vanishing electric permittivity in bounded domains and subject to absorbing boundary conditions. The problem arises naturally in magnetotellurics when ...
Planewave Density Interpolation Methods for the EFIE on Simple and Composite Surfaces
(2021)
This article presents an extension of the recently introduced planewave density interpolation method to the electric-field integral equation (EFIE) for problems of scattering and radiation by perfect electric conducting ...
A geometrical approach of 3-D FEA for educational purposes applied to electrostatic fields
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2008)
A geometrical approach of the finite-element analysis applied to electrostatic fields is presented. This approach is particularly well adapted to teaching Finite Elements in Electrical Engineering courses at undergraduate ...
Magnetic field evolution in neutron stars: one-dimensional multi-fluid model
(EDP SCIENCES S A, 2008-09)
Aims. This paper is the first in a series that aims to understand the long-term evolution of neutron star magnetic fields.
Methods. We model the stellar matter as an electrically neutral and lightly-ionized plasma composed ...
Meshless methods in electromagnetic wave scattering
(Universidade Federal de Minas GeraisUFMG, 2011-02-04)
This work is concerned with the application of meshless methods to some problems of mathematical physics described either by integral or by partial differential equations. Meshless methods are a recent alternative to the ...
Plasmons and the electromagnetic response of nanowires
(2010)
We present a theory of the nature of plasmons in nanowires along with the response of such systems to a
spatially uniform applied electric field in the plane perpendicular to the symmetry axis of the wire. We confine
our ...
INTEGRATION OF THE NONLINEAR POISSON BOLTZMANN-EQUATION FOR CHARGED VESICLES IN ELECTROLYTIC SOLUTIONS
(Amer Chemical Soc, 1993-03-01)
The Poisson-Boltzmann equation (PBE), with specific ion-surface interactions and a cell model, was used to calculate the electrostatic properties of aqueous solutions containing vesicles of ionic amphiphiles. Vesicles are ...
INTEGRATION OF THE NONLINEAR POISSON BOLTZMANN-EQUATION FOR CHARGED VESICLES IN ELECTROLYTIC SOLUTIONS
(Amer Chemical Soc, 1993-03-01)
The Poisson-Boltzmann equation (PBE), with specific ion-surface interactions and a cell model, was used to calculate the electrostatic properties of aqueous solutions containing vesicles of ionic amphiphiles. Vesicles are ...
Fenômenos não-lineares de transporte elétrico induzidos por geração-recombinação em semicondutores
(Universidade Federal de Minas GeraisUFMG, 2005-12-07)
In this work, we studied theoretical models to explain the non-linear behavior of the electric transport of charge carriers in semiconductors. We focused the studies in the numerical integrations of differential equations ...