Results 251 to 260 of about 8,606 (269)

Effect of Electromagnetic Pulse Exposure on Brain Micro Vascular Permeability in Rats

Biomedical and Environmental Sciences, 2009
To observe the effect of electromagnetic pulse (EMP) exposure on cerebral micro vascular permeability in rats.The whole-body of male Sprague-Dawley rats were exposed or sham exposed to 200 pulses or 400 pulses (1 Hz) of EMP at 200 kV/m. At 0.5, 1, 3, 6, and 12 h after EMP exposure, the permeability of cerebral micro vascular was detected by ...
Yong-Chun Zhou, Kang-Chu Li, Shenglong Xu, Guo-Zhen Guo, Juan Tan, Lian-Bo Qiu, Xiao-Wu Wang, Gui-Rong Ding   +7 more
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On the time-domain electromagnetic response of a conductive permeable sphere

Journal of Applied Geophysics, 2009
The time-domain EM response of a conducting sphere has been subject of past studies with a particular goal of understanding the response of steel unexploded ordnance items. A change in formulas and parameter definition between authors has created inconsistency between published results and analytic formulas.
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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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Simultaneous inversion of airborne electromagnetic data for resistivity and magnetic permeability

GEOPHYSICS, 1998
Where the magnetic permeability of rock or soil exceeds that of free space, the effect on airborne electromagnetic systems is to produce a frequency‐independent shift in the in‐phase response of the system while altering the quadrature response only slightly.
Les P. Beard, Jonathan E. Nyquist
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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 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 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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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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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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Scattering of Electromagnetic waves by coaxial ferrite cylinders of different tensor permeabilities

Applied Scientific Research, Section B, 1960
The boundary value problem of the scattering of a plane electromagnetic wave normally incident on coaxial ferrite cylinders of different tensor permeabilities is investigated. The expressions for the scattered field are derived in terms of Bessel and Neumann functions of different orders.
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