Results 191 to 200 of about 556 (226)
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IEEE Transactions on Geoscience and Remote Sensing, 2004
We use a hybrid model including asymptotic expressions of the spheroidal wave functions (SWFs) to obtain a reliable broadband solution for the electromagnetic induction (EMI) response from a conducting and permeable spheroid. We obtain this broadband response, valid in the magnetoquasistatic regime from zero to hundreds of kilohertz, by combining three
Benjamin E. Barrowes +4 more
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We use a hybrid model including asymptotic expressions of the spheroidal wave functions (SWFs) to obtain a reliable broadband solution for the electromagnetic induction (EMI) response from a conducting and permeable spheroid. We obtain this broadband response, valid in the magnetoquasistatic regime from zero to hundreds of kilohertz, by combining three
Benjamin E. Barrowes +4 more
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RF thin-film permeability measurements in a travelling electromagnetic field
IEEE International Digest of Technical Papers on Magnetics Conference, 2003Summary form only given. Thin film permeability measurements in the RF range gives useful information for materials science and modem IT device developments including cellular phone (0.8-2GHz) and bluetooth devices (2.45GHz). We propose a new permeameter utilizing traveling electromagnetic field mode and a shielded-loop type planar pickup coil.
Y. Miyazawa +3 more
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Simultaneous inversion of airborne electromagnetic data for resistivity and magnetic permeability
Geophysics, 1998Abstract 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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ELECTROMAGNETIC PERMEABILITY FORECAST BEYOND BOREHOLES
Геофизические исследования, 2022openaire +1 more source
On the time-domain electromagnetic response of a conductive permeable sphere
Journal of Applied Geophysics, 2009The 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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Permeability Prediction from Electromagnetic Measurements
5th International Congress of the Brazilian Geophysical Society, 1997Qamar M. Malik +3 more
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Scattering of Electromagnetic waves by coaxial ferrite cylinders of different tensor permeabilities
Applied Scientific Research, Section B, 1960The 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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Inversion of airborne electromagnetic data for magnetic permeability
SEG Technical Program Expanded Abstracts 1996, 1996Les P. Beard, Jonathan E. Nyquist
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Electromagnetic Induction in a Uniform Permeable Conducting Sphere
Proceedings of the London Mathematical Society, 1932openaire +1 more source
Electromagnetic Phenomena in Metals with Constant Permeability
2017Janusz Turowski, Marek Turowski
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