Results 181 to 190 of about 556 (226)

Transient electromagnetic response of a permeable nonuniformly conducting sphere

Journal of Applied Physics, 1975
Quasistatic 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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THE NEGATIVE PERMITTIVITY AND PERMEABILITY CHARACTERISTICS OF TRIANGULAR ELECTROMAGNETIC RESONATORS

International Journal of Modern Physics B, 2011
In 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 ...
C. ZHU, L. LI, C. H. LIANG
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Effect of negative permeability on negative permittivity in electromagnetic metamaterials

High Power Laser and Particle Beams, 2010
For further understanding of the interactions between different materials in the electromagnetic metamaterials, the change characteristics of the effective permittivity of wire array embedded in a single negative permeability medium were analyzed theoretically.
黄勇军 Huang Yongjun, 文光俊 Wen Guangjun, 李天倩 Li Tianqian, 谢康 Xie Kang   +3 more
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Current Sheet Permeability in Electromagnetic Pulsed Plasma Thrusters

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
John Berkery, Edgar Choueiri
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Electromagnetic Waves in Media With Correlated Inhomogeneity of Permittivity and Permeability

Journal of Applied Spectroscopy, 2014
The propagation of electromagnetic waves is examined in inhomogeneous media where the product of the permittivity and permeability is independent of position. A plasma-like frequency dispersion of the refractive index in these media is predicted. It is established that there is a cutoff frequency below which electromagnetic waves cannot be excited in ...
A. N. Serdyukov, A. N. Yegorov, M. A. Serdyukova   +2 more
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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 ...
Gui-Rong, Ding, Kang-Chu, Li, Xiao-Wu, Wang, Yong-Chun, Zhou, Lian-Bo, Qiu, Juan, Tan, Sheng-Long, Xu, Guo-Zhen, Guo   +7 more
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Flexible Antenna on High Permeability Substrate for Electromagnetic Head Imaging Systems

2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2018
The performance assessment and analysis of a wearable microstrip antenna based on high permeability material substrate in head imaging system is presented. The antenna is designed on polymer RTV6166-iron oxide substrate with relative permittivity and relative permeability of 3 and 5, respectively.
Alqadami, Abdulrahman S. M., Bialkowski, Konstanty, Abbosh, Amin   +2 more
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Effect of Electromagnetic Pulse Exposure on Permeability of Blood-testicle Barrier in Mice

Biomedical and Environmental Sciences, 2008
To study the effect of electromagnetic pulse (EMP) exposure on the permeability of blood-testicle barrier (BTB) in mice.Adult male BALB/c mice were exposed to EMP at 200 kV/m for 200 pulses with 2 seconds interval. The mice were injected with 2% Evans Blue solution through caudal vein at different time points after exposure, and the permeability of BTB
Xiao-Wu, Wang, Gui-Rong, Ding, Chang-Hong, Shi, Tao, Zhao, Jie, Zhang, Li-Hua, Zeng, Guo-Zhen, Guo   +6 more
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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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Electromagnetic Models for UXO Detection and Classification in Permeable Soils

2008
Abstract : Support Vector Machine (SVM) and neural networks (NN), are applied to classifying metallic objects according to size using the expansion coefficients of their magneto-quasistatic (MQS) response in the spheroidal coordinate system. The classified objects include homogeneous spheroids and composite metallic assemblages meant to resemble ...
Bae-Ian Wu, Kevin O'Neill, Jin A. Kong, Beijia Zhang   +3 more
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