Results 241 to 250 of about 15,517,805 (287)

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 .
openaire   +2 more sources

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
openaire   +1 more source

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 ...
openaire   +1 more source

Theory of electromagnetic generation of acoustic waves in metals

Advances in Physics, 1986
Abstract The theory of the anomalous skin effect in metals is used in order to study the direct generation of ultrasound by electromagnetic radiation incident on a metal surface, in the absence and in the presence of a magnetic field. The non-monotonic behaviour of the acoustic flux observed experimentally, as a function of the magnetic field can be ...
E. Kartheuser, L.R. Ram Mohan, S. Rodriguez   +2 more
openaire   +1 more source

Theory of the anomalous electromagnetic generation of ultrasound in aluminum

Physical Review B, 1978
Anomalies observed in electromagnetic generation of ultrasound in aluminum are explained on the basis of known Fermi-surface geometry. At large values of ${\ensuremath{\omega}}_{c} \ensuremath{\tau}$ the topology of the second-zone hole sheet permits only holelike cyclotron orbits, while for small values of ${\ensuremath{\omega}}_{c} \ensuremath{\tau}$
N. C. Banik, A. W. Overhauser
openaire   +1 more source

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
openaire   +1 more source

Electromagnetic electron hole generation: theory and PIC simulations

2021
<div> <div> <div> <p>Recent MMS observations (<em>e.g.</em> [Holmes et al, 2018, Steinvall et al., 2019]) exploring various regions of the magnetosphere have found solitary potential structures call Electron phase-space Hole (EH).
Gauthier, Gaetan, Chust, Thomas, Le Contel, Olivier, Savoini, Philippe   +3 more
openaire   +2 more sources

Generalization of the Hoyle-Narlikar theory and connection between electromagnetism and gravitation in the generalized theory

Gravitation and Cosmology, 2013
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

6-Optics and a general theory of gravitation and electromagnetism

Soviet Physics Journal, 1984
It is shown that the equation of motion of material particles in a curved spacetime in the presence of electromagnetic field, known from general relativity, is equivalent to an equation for a geodesic line in a 6-dimensional Riemannian manifold of signature (+----+), at least when a special choice of the 6-metric has been made.
Yu. S. Vladimirov, A. A. Kozlenkov
openaire   +1 more source

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
openaire   +1 more source