Results 11 to 20 of about 21,314 (264)

Nonstationary discrete theory of excitation of periodic structures and its application for simulation of traveling-wave tubes [PDF]

open access: yesИзвестия высших учебных заведений: Прикладная нелинейная динамика, 2021
Aim. This article presents a review of the nonstationary (time-domain) discrete theory of excitation of periodic electromagnetic structures and discusses applications of the theory for simulation of traveling-wave tube (TWT) microwave power amplifiers ...
Ryskin, Nikita Mikhailovich   +4 more
doaj   +1 more source

Frequency-Selective Dual Linearly Polarized 76 to 81 GHz Automotive Radar System Concept for Street Condition Monitoring [PDF]

open access: yesAdvances in Radio Science
This study introduces a novel frequency-selective radar system for street condition monitoring (SCM) that eliminates the cost-intensive dedicated monolithic microwave integrated circuit (MMIC) channels approach by sharing radar channels across different ...
S. H. Kazimi   +5 more
doaj   +1 more source

Theory of optical axion electrodynamics and application to the Kerr effect in topological antiferromagnets

open access: yesNature Communications, 2022
Electromagnetic response of topological materials is described the so called axion electrodynamics which contains additional relations between the fields.
Junyeong Ahn   +2 more
doaj   +1 more source

New class of exact solutions to Einstein–Maxwell-dilaton theory on four-dimensional Bianchi type IX geometry

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
We construct new classes of cosmological solution to the five dimensional Einstein–Maxwell-dilaton theory, that are non-stationary and almost conformally regular everywhere.
Bardia H. Fahim, Masoud Ghezelbash
doaj   +1 more source

Electromagnetic Doppler effect in non-reciprocal medium

open access: yesAIP Advances, 2023
Reflected light from a moving object, such as a mirror, is frequency-shifted via the Doppler effect. This well-known phenomenon is used to determine the speed and direction of an object due to the red or blue shifting of the received electromagnetic ...
Douglas M. Baney
doaj   +1 more source

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

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

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