Results 21 to 30 of about 385,363 (284)

Measurement Theory and General Relativity [PDF]

open access: yes, 1998
The theory of measurement is employed to elucidate the physical basis of general relativity. For measurements involving phenomena with intrinsic length or time scales, such scales must in general be negligible compared to the (translational and ...
Hehl, F W, Kiefer, C, Metzler, R
core   +3 more sources

Electromagnetic Properties of Neutrinos

open access: yesAdvances in High Energy Physics, 2012
In this paper, we discuss the main theoretical aspects and experimental effects of neutrino electromagnetic properties. We start with a general description of the electromagnetic form factors of Dirac and Majorana neutrinos.
C. Broggini, C. Giunti, A. Studenikin
doaj   +1 more source

Pure electromagnetic-gravitational interaction in Hořava–Lifshitz theory at the kinetic conformal point

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
We introduce the electromagnetic-gravitational coupling in the Hořava–Lifshitz framework, in $$3+1$$ 3+1 dimensions, by considering the Hořava–Lifshitz gravity theory in $$4+1$$ 4+1 dimensions at the kinetic conformal point and then performing a Kaluza ...
Alvaro Restuccia, Francisco Tello-Ortiz
doaj   +1 more source

Weak Turbulence and Quasilinear Diffusion for Relativistic Wave-Particle Interactions Via a Markov Approach

open access: yesFrontiers in Astronomy and Space Sciences, 2022
We derive weak turbulence and quasilinear models for relativistic charged particle dynamics in pitch-angle and energy space, due to interactions with electromagnetic waves propagating (anti-)parallel to a uniform background magnetic field.
Oliver Allanson   +5 more
doaj   +1 more source

Relativistic x-ray free-electron lasers in the quantum regime [PDF]

open access: yes, 2012
We present a nonlinear theory for relativistic x-ray free-electron lasers in the quantum regime, using a collective Klein-Gordon (KG) equation (for relativistic electrons), which is coupled with the Maxwell-Poisson equations for the electromagnetic and ...
Eliasson, Bengt, Shukla, Padma
core   +2 more sources

Fractal Clustering as Spatial Variability of Magnetic Anomalies Measurements for Impending Earthquakes and the Thermodynamic Fractal Dimension

open access: yesFractal and Fractional, 2022
Several studies focusing on the anomalies of one specific parameter (such as magnetic, ionospheric, radon release, temperature, geodetic, etc.) before impending earthquakes are constantly challenged because their results can be regarded as noise, false ...
Patricio Venegas-Aravena   +2 more
doaj   +1 more source

The Spatial Singularity Expansion Method for Electromagnetics

open access: yesIEEE Access, 2019
We develop a general singularity expansion method (SEM) focused on the spatial structure of electromagnetic fields and currents. In contrast to the traditional temporal SEM, where complex analytical continuation is performed on the forward Green's ...
Said Mikki   +2 more
doaj   +1 more source

Quantum spin dynamics in external classical fields [PDF]

open access: yesEPJ Web of Conferences, 2019
We study the quantum and classical dynamics of spinning particles in the framework of the general-relativistic covariant Dirac theory. The exact Foldy-Wouthuysen transformation for the most general case of a fermion in arbitrary configurations of the ...
Obukhov Yuri N.   +2 more
doaj   +1 more source

Creation of a system for automatic monitoring of electromagnetic effects on biological and technical systems [PDF]

open access: yesBIO Web of Conferences, 2022
Using a digital “twin” of a convergent biological and technical supersystem of a certain region to develop measures to ensure environmental safety is because of the need to analyze and predict processes and the level of electromagnetic pollution of the ...
Grabchak Evgeniy   +2 more
doaj   +1 more source

Electromagnetic Transients in Multiconductor Transmission Lines

open access: yesJournal of Microwaves, Optoelectronics and Electromagnetic Applications, 2022
The theory of multiconductor transmission lines is based on the principle of superposition. According to this principle, any electric or magnetic field can be represented as the sum of individual electric or magnetic fields.
Rooney R. A. Coelho   +2 more
doaj   +1 more source

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