Results 41 to 50 of about 1,170,845 (206)

Transient electromagnetic field above a permeable and conducting half-space [PDF]

open access: yesGeophysical Journal International, 1985
Summary. The transient fields resulting from an abrupt current switch-off in a vertically oriented finite loop and a magnetic dipole above a permeable and conducting half-space have been investigated by Fourier methods, utilizing an appropriate Green's function.
Y.-C. Thio, R. Ignetik, K. C. Westfold
openaire   +2 more sources

Wave Propagation in Composites of Plasma and Metamaterials with Negative Permittivity and Permeability

open access: yesScientific Reports, 2019
Wave propagation is observed through a negative permeability metamaterial immersed in gaseous plasma. A 3D array of split ring resonators (SRR) is enveloped by an inductively heated argon plasma with a nominal plasma frequency of 2.65 GHz.
Hyunjun Kim, J. Hopwood
semanticscholar   +1 more source

Galilean Covariance versus Gauge Invariance [PDF]

open access: yes, 2009
We demonstrate for the first time and unexpectedly that the Principle of Relativity dictates the choice of the "gauge conditions" in the canonical example of a Gauge Theory namely Classical Electromagnetism.
Rousseaux, Germain
core   +2 more sources

On the theory of the skewon field: From electrodynamics to gravity

open access: yes, 2005
The Maxwell equations expressed in terms of the excitation $\H=({\cal H}, {\cal D})$ and the field strength $F=(E,B)$ are metric-free and require an additional constitutive law in order to represent a complete set of field equations.
Blagojević   +32 more
core   +1 more source

Magnetic Permeability of Constrained Fermionic Vacuum

open access: yes, 1998
We obtain using Schwinger's proper time approach the Casimir-Euler-Heisenberg effective action of fermion fluctuations for the case of an applied magnetic field.
A. Tort   +12 more
core   +2 more sources

Magnetic dipole moments in single and coupled split-ring resonators

open access: yes, 2009
We examine the role of magnetic dipoles in single and coupled pairs of metallic split-ring resonators by numerically computing their magnitude and examining their relative contributions to the scattering cross section.
A. Taflove   +9 more
core   +1 more source

The effect of rock permeability and porosity on seismoelectric conversion: experiment and analytical modelling

open access: yesGeophysical Journal International, 2019
The seismoelectric method is a modification of conventional seismic measurements which involves the conversion of an incident poroelastic wave to an electromagnetic signal that can be measured at the surface or down a borehole.
R. Peng   +8 more
semanticscholar   +1 more source

A differential geometry approach to asymmetric transmission of light

open access: yes, 2017
In the last ten years, the technology of differential geometry, ubiquitous in gravitational physics, has found its place in the field of optics. It has been successfully used in the design of optical metamaterials, through a technique now known as ...
Asenjo, Felipe A.   +4 more
core   +1 more source

Detrimental Effect of Mobile Phone Electromagnetic Field on Permeability of Blood-Brain Barrier [PDF]

open access: gold, 2020
Fatemeh Shabani   +4 more
openalex   +1 more source

Distinctly enhanced permeability and excellent microwave absorption of expanded graphite/Fe3O4 nanoring composites

open access: yes, 2017
To break Snoek's limit and obtain high permeability, expanded graphite/Fe3O4 nanoring composites have been synthesized via a solvothermal-surface modification-sintering approach.
Yanting Zhao   +7 more
semanticscholar   +1 more source

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