Results 251 to 260 of about 50,809 (304)
Some of the next articles are maybe not open access.
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.
Chandra P. Gupta +2 more
openaire +2 more sources
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.
openaire +3 more sources
Current Sheet Permeability in Electromagnetic Pulsed Plasma Thrusters [PDF]
38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2002 A 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
Edgar Y. Choueiri, John Berkery
openaire +1 more source
Inversion of Multifrequency Electromagnetic Data to a Conductive and Permeable Sphere
Symposium on the Application of Geophysics to Engineering and Environmental Problems 2001, 2001We have developed an algorithm for inverting broadband electromagnetic (EM) data to determine its electrical conductivity, magnetic permeability, radius, and depth using a sphere model. The algorithm is based on traditional non-linear inverse methods with singular value decomposition.
I. J. Won, Haoping Huang
openaire +2 more sources
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
openaire +2 more sources
Inclusion of Finite Permeability on Design and Optimization of an Electromagnetic Undulator
Chinese Physics Letters, 2014We derive an alternate analytical expression for the optimum dimensions of an electromagnetic undulator with a finite permeability lamination core. The analytical expressions are compared with earlier results under an infinite permeability approximation of the lamination core of the electromagnetic undulator design.
Vijay Huse +3 more
openaire +2 more sources
Analysis of Electromagnetic Field on the Permeability Test of Concrete
2012 Asia-Pacific Power and Energy Engineering Conference, 2012The method of water pressure measuring permeability of concrete has a long test cycle, low efficiency, and doesn't apply to low permeability of concrete. The method based on electricity can overcome these shortcomings. This paper puts forward the method of streaming potential coefficient to measure the permeability of concrete, which is reasonable ...
openaire +2 more sources
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 ...
Madhu S. Joshi, Saurabh K. Verma
openaire +2 more sources
THE NEGATIVE PERMITTIVITY AND PERMEABILITY CHARACTERISTICS OF TRIANGULAR ELECTROMAGNETIC RESONATORS
International Journal of Modern Physics B, 2011In this paper, the triangular electromagnetic resonators (TERs) is introduced and investigated. The electric mode at lower frequency and magnetic mode at higher frequency, originating from coupling to the electric field and magnetic field, are validated through the measurement in parallel-plate waveguide system, parameter retrieval algorithm and ...
Cheng Zhu, Lixiang Li, Chang-Hong Liang
openaire +2 more sources
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 ...
Qiushi Sun +6 more
openaire +2 more sources