Results 41 to 50 of about 260,869 (174)

Electromagnetic wave multipath channel model based on image method in mine tunnel

open access: yesGong-kuang zidonghua, 2017
In view of complicated electromagnetic wave propagation environment in mine tunnel, a multipath channel model of electromagnetic wave propagation in mine tunnel was established by use of image method.
YAO Shanhua
doaj   +1 more source

Reflection-less device allows electromagnetic warp drive [PDF]

open access: yes, 2010
One of the striking properties of artificially structured materials is the negative refraction, an optical feature that known natural materials do not exhibit.
Nacher, J. C., Ochiai, T.
core  

A test of the electromagnetic theory of the hydrogen vortices surrounding sun-spots [PDF]

open access: yes, 1925
The extensive fields of force shown by the spectroheliograph in the hydrogen atmosphere surrounding sun-spots have been explained in two different ways: (1) as true hydrodynamical vortices, resembling great tornadoes, and (2) as electromagnetic phenomena,
Hale, George E.
core  

Field sources in a Lorentz symmetry breaking scenario with a single background vector

open access: yes, 2014
This paper is devoted to investigating the interactions between stationary sources of the electromagnetic field, in a model which exhibits explicit Lorentz-symmetry breaking due to the presence of a single background vector.
Barone, F. A.   +2 more
core   +1 more source

Cosmic Plasmas and Electromagnetic Phenomena [PDF]

open access: yes, 2019
During the past few decades, plasma science has witnessed a great growth in laboratory studies, in simulations, and in space. Plasma is the most common phase of ordinary matter in the universe. It is a state in which ionized matter (even as low as 1%) becomes highly electrically conductive.
Meli, Athina   +2 more
openaire   +3 more sources

A Multiphysics Analysis of Coupled Electromagnetic-Thermal Phenomena in Cable Lines

open access: yesEnergies, 2021
The paper is focused on numerical modeling of multi-strand cable lines placed in free air. Modeling is carried out within the framework of the so-called multi-physics approach using commercial software.
Artur Cywiński, Krzysztof Chwastek
doaj   +1 more source

Electromagnetic Transients in Multi-Voltage Transmission Lines during Non-Simultaneous Faults

open access: yesEnergies, 2022
It is vitally important that a transmission network provides a continuity of electricity to end users and that the transmission system operator prioritizes its safety and reliability.
Daria Zychma, Paweł Sowa
doaj   +1 more source

Lorentz Symmetry Breaking and Planar Effects from Non-Linear Electrodynamics

open access: yes, 2006
We propose a modification of standard linear electrodynamics in four dimensions, where effective non-trivial interactions of the electromagnetic field with itself and with matter fields induce Lorentz violating Chern-Simons terms.
Cantcheff, Marcelo Botta
core   +1 more source

Evaluation of a low-cost and low-noise active dry electrode for long-term biopotential recording

open access: yesJournal of Medical Signals and Sensors, 2016
Wet Ag/AgCl electrodes, although very popular in clinical diagnosis, are not appropriate for expanding applications of wearable biopotential recording systems which are used repetitively and for a long time.
Ali Pourahmad, Amin Mahnam
doaj  

The effective action of (2+1)-dimensional QED: the effect of finite fermion density

open access: yes, 1997
The effective action of (2+1)-dimensional QED with finite fermion density is calculated in a uniform electromagnetic field. It is shown that the integer quantum Hall effect and de Haas-van Alphen like phenomena in condensed matter physics are derived ...
A. Chodos   +24 more
core   +2 more sources

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