Results 191 to 200 of about 8,470 (227)
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Electromagnetic response of a permeable inhomogeneous conducting sphere
Geoexploration, 1973Abstract Electromagnetic response of a two-layered spherical model to a dipolar field has been calculated considering the simultaneous influences of a permeable conducting cover, magnetic permeability contrast with the surrounding medium, and radial conductivity variation inside the core.
Janardan G. Negi +2 more
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Current Sheet Permeability in Electromagnetic Pulsed Plasma Thrusters
38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2002A case is made for the existence of permeability of current sheets in electromagneticpulsed plasma thrusters. Permeability refers to the leakage of plasma or neutral par-ticles behind the sheet and could cause a significant effect on the performance of thethruster. Analytical calculations are presented which demonstrate the mismatch be-tween experimental
John Berkery, Edgar Choueiri
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The impact of non-linear permeability on electromagnetic stator core tests
7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014), 2014Routine electromagnetic testing is used to detect developing faults in the stator cores of large electrical machines. However the non-linear permeability and hysteresis of electrical steel cause the development of harmonics in the magnetic field, potentially affecting fault interpretation.
Bertenshaw, D. R., Smith, A. C.
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Permeability enhancement of Kv1.2 potassium channel by a terahertz electromagnetic field
The Journal of Chemical Physics, 2023As biomolecules vibrate and rotate in the terahertz band, the biological effects of terahertz electromagnetic fields have drawn considerable attention from the physiological and medical communities. Ion channels are the basis of biological electrical signals, so studying the effect of terahertz electromagnetic fields on ion channels is significant.
Xiaofei Zhao +6 more
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Transient electromagnetic response of a permeable nonuniformly conducting sphere
Journal of Applied Physics, 1975Quasistatic response of a nonuniformly conducting and magnetically permeable sphere to a step pulse is obtained. the effect of conductivity distribution pattern and permeability of the sphere on the transient response is examined in detail. The results show that the introduction of conductivity inhomogeneity has considerable effect on the observed ...
Saurabh K. Verma, Madhu S. Joshi
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Negative-permeability electromagnetically induced transparent and magnetically active metamaterials
Physical Review B, 2010tions, but currently their performance is limited by the occurrence of losses—particularly radiation losses, which dominate over their dissipative counterparts even in the optical regime. Here, a metamaterial configuration is conceived that judiciously generalizes the traditional electromagnetically induced transparency EIT scheme—by which radiation ...
Tsakmakidis, KL +4 more
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Analytical Mode III electromagnetic permeable cracks in magnetoelectroelastic materials
Computers & Structures, 2011Fracture 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
Z.H. Zhou, X.S. Xu, A.Y.T. Leung
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Broadband electromagnetic induction response form conducting and permeable spheroids
SPIE Proceedings, 2001Broadband electromagnetic induction (EMI) methods are promising in the detection and discrimination of subsurface metallic targets. We compute EMI responses from conducting and permeable spheroids by using a field expansion method which is based on the separation of variables in spheroidal coordinates. In addition to an exact formulation which utilizes
Chi-On Ao +5 more
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Electromagnetic transient response of rotationally symmetric permeable conducting objects
1988 IEEE AP-S. International Symposium, Antennas and Propagation, 2003Low-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.
A. Sebak, L. Shafai, Y. Das
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Electromagnetic-heating enhancement of source rock permeability for high recovery
Fuel, 2021Abstract Source rock shales have permeability in the nano-Darcy range and require drilling long horizontal wells and extensive hydraulic fracturing to commercially produce hydrocarbons. Recently, an electromagnetic (EM) thermal method was proposed as a primary, or secondary, stimulation method to produce light hydrocarbons from extremely tight ...
Jin-Hong Chen +6 more
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