Results 241 to 250 of about 383,957 (288)

A Generalized metric space for Electromagnetic Theory

Bulletin de la Classe des sciences, 1965
On étudie l'espace de configuration d'un point en mouvement dans un champ électromagnétique généralisé. Fonction de Lagrange L et Hamiltonienne H. Équations de mouvements. Interprétation géométrique des équations L = 1 et H = 1 .
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General Relativistic Theory of Electromagnetism

1979
In the general theory of relativity the event world is represented by the Minkowskian manifold C whose structure is determined by the distribution of the stress-energy-momentum tensors on C in accord with Einstein’s field equations. This distribution is dominated by its intrinsic part, which is due to the presence of proper mass in a material medium ...
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Quasilinear theory of general electromagnetic fluctuations in unmagnetized plasmas

Physics of Plasmas, 2014
The general quasilinear Fokker-Planck kinetic equation for the plasma particle distribution functions in unmagnetized plasmas is derived, making no restrictions on the frequency of the electromagnetic fluctuations. The derived kinetic particle equation complements our earlier study of the general fluctuation's kinetic equation.
R. Schlickeiser, P. H. Yoon
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Spectral problem in a generalized theory of electromagnetic waves

2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), 2017
It is shown theoretically that electromagnetic process is potentially-vortex. This extends Maxwell's theory. We detected four-dimensional vector potential which is a fundamental characteristic of the electromagnetic field. It has been shown that it describes unambiguously a velocity field of physical vacuum in the selected frame.
G. G. Islamov, A. K. Tomilin
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Uniform Electromagnetic Field in the Theory of General Relativity

Physical Review, 1959
A cosmological solution of the Einstein-Maxwell's field equations, corresponding to the case of a uniform (that is, covariant constant) electromagnetic field, is derived by means of simple geometrical arguments; the Riemannian manifold it corresponds to is the product of two ordinary surfaces of constant curvature, whose type and radius depend on the ...
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Theory of Electromagnetic Generation of Transverse Ultrasound in Ferromagnets

International Journal of Applied Electromagnetics and Mechanics, 1993
Theoretical study of the processes of electromagnetic excitation of transverse ultrasound in hexagonal magnetics is presented. It is shown, that the amplitude of ultrasound excited sharply increases at ferromagnetic resonance frequency. At frequencies far from ferromagnetic resonance the generation peak took place at the magnetoelastic resonance ...
A.N. Vasil'ev, YD. Buchelnikov
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Electromagnetic radiation in the general theory of relativity. I

Soviet Physics Journal, 1973
The possibilities are investigated for the joint solution of Einstein's and Maxwell's equations for an isotropic electromagnetic field. Three groups of metric forms of space are shown, in which such a solution is permissible.
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General Theory of Interaction of Electromagnetic Fields with Matter

1994
The electromagnetic field is described by two vectors e and h, that is, by the macroscopic strengths of the electric and magnetic fields. These are the exact instantaneous values of the fields at a given point at a specific moment of time. We denote the averaged fields in the medium by e and H.
Yu. A. Il’inskii, L. V. Keldysh
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The Hamiltonian of the General Theory of Relativity with Electromagnetic Field

Physical Review, 1950
In this paper we have given a specific example of a Hamiltonian of a non-linear field theory, a Hamiltonian density completely free of time derivatives. In accordance with the general theory developed previously, this Hamiltonian is one of the constraints between the canonical variables and, therefore, vanishes everywhere.
Bergmann, Peter G., Penfield, Robert, Schiller, Ralph, Zatzkis, Henry   +3 more
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On the theory of electromagnetic generation of ultrasound in metals

Solid State Communications, 1980
Abstract The expressions obtained in [1–4] for the electron force acting in metals have been discussed and compared. It has been shown that for free electrons these expressions coincide and the discrepancy is due to the incomplete register of the bound structure effects in [2, 3].
E.A. Kaner, V.L. Falko
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