Results 271 to 280 of about 50,809 (304)

Electromagnetic transient response of rotationally symmetric permeable conducting objects

1988 IEEE AP-S. International Symposium, Antennas and Propagation, 2003
Low-frequency transient response is often used to detect or identify buried objects. At sufficiently low frequencies, the signal penetration in the ground is high and the air-earth interface has a negligible effect on the return response. The use of an exciting current loop also minimizes the ground conductivity effect.
Y. Das, Lotfollah Shafai, A. Sebak
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Electromagnetic Propagation in Homogeneous Media With Hermitian Permeability and Permittivity

Bell System Technical Journal, 1982
The problem of electromagnetic radiation traveling in a general homogeneous, but anisotropic and gyrotropic, medium has been solved. The plane wave representation is used to convert Maxwell's equations into a general eigenproblem, which allows for tensor permeability and permittivity and for electric and magnetic gyrotropy.
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Quasistatic transient electromagnetic response of a permeable nonuniformly conducting cylinder

Canadian Journal of Physics, 1976
The step-pulse response of a permeable and a radially nonuniformly conducting cylinder is obtained. Effects of the conductivity distribution pattern and the magnetic permeability on the transient response are examined in detail. It is found that: (i) the initial response (for t → 0) remains unaffected by both the inhomogeneity and the permeability of ...
S. K. Verma, M. S. Joshi
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Electromagnetic response of a covered inhomogeneous permeable conductor in time domain

pure and applied geophysics, 1971
An initial value induction problem has been solved to examine the response of a massive sulphide ore body under conditions of common occurence. The generalized expression for the induced field due to a step-function dipolar field in the presence of a non-uniformly conducting permeable sphere surrounded by a finitely resistive overburden has been ...
Upendra Raval, Chandra P. Gupta
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Analytical Mode III electromagnetic permeable cracks in magnetoelectroelastic materials

Computers & Structures, 2011
Fracture mechanism is pertinent to minimize the catastrophic failures and optimize the structural design. An exact treatment on the electromagnetic permeable crack problems in a magnetoelectroelastic medium is presented by establishing a Hamiltonian system in terms of the symplectic eigenfunctions. The coefficients of the series are determined from the
Xinsheng Xu, Andrew Y. T. Leung, Zhenhuan Zhou   +2 more
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Electromagnetic Monitoring of Hydraulic Fracturing: Relationship to Permeability, Seismicity, and Stress

Surveys in Geophysics, 2017
Hydraulic fracking is a geoengineering application designed to enhance subsurface permeability to maximize fluid and gas flow. Fracking is commonly used in enhanced geothermal systems (EGS), tight shale gas, and coal seam gas (CSG) plays and in $$\hbox {CO}_2$$
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Inversion of airborne electromagnetic data for magnetic permeability

SEG Technical Program Expanded Abstracts 1996, 1996
Les P. Beard, Jonathan E. Nyquist
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Permeability Prediction from Electromagnetic Measurements

5th International Congress of the Brazilian Geophysical Society, 1997
Qamar M. Malik, Michael S. King, Brigida R.P. da Rocha, Robert Marsden   +3 more
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Electromagnetic field quantization in a linear isotropic permeable dielectric medium

Physical Review A, 2004
The macroscopic electromagnetic field is quantized in a linear isotropic permeable-dielectric medium by associating a proper damped quantum-mechanical harmonic oscillator with each mode of the radiation field. We introduce a particular form of the Langevin equation with two memory functions and two random impulses to describe the motion of a damped ...
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Electromagnetic field induced permeability response of cells and membranes

Effects of man-made electromagnetic fields on living organisms potentially include transient and permanent changes in cell behaviour, physiology and morphology. At present these effects are poorly defined, yet their understanding may provide important insights.
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