Journal of Electromagnetic Analysis and Applications

Journal Information
ISSN / EISSN : 19420730 / 19420749
Current Publisher: Scientific Research Publishing, Inc, (10.4236)
Total articles ≅ 497
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Latest articles in this journal

Kaichen Wang, Ruiwen Chen
Journal of Electromagnetic Analysis and Applications, Volume 12, pp 1-5; doi:10.4236/jemaa.2020.121001

Abstract:Electromagnetic propulsion provides a non-contact way for delivering goods. The projectile typically does not contain explosives, which has apparent advantages over traditional methods. Due to the multi-physics nature, simulation is expensive and time-consuming. We established a simplified model in time domain incorporating mechanics and electromagnetics to study electromagnetic propulsion. Results show that important physical parameters such as force, velocity, acceleration, etc. can be extracted from the model without time-consuming efforts. We hope this model could help the exploration of electromagnetic propulsion.
Randy Ott
Journal of Electromagnetic Analysis and Applications, Volume 11, pp 161-172; doi:10.4236/jemaa.2019.119011

Abstract:The resolvent helps solve a PDE defined on all of wave-number space, . Almost all electromagnetic scattering problems have been solved on the spatial side and use the spatial Green’s function approach. This work is motivated by solving an EM problem on the Fourier side in order to relate the resolvent and the Green’s function. Methods used include Matrix Theory, Fourier Transforms, and Green’s function. A closed form of the resolvent is derived for the electromagnetic Helmholtz reduced vector wave equation, with Dirichlet boundary conditions. The resolvent is then used to derive expressions for the solution of the EM wave equation and provide Sobolev estimates for the solution.
Antônio Flavio Licarião Nogueira, Rodolfo Lauro Weinert, Leonardo José Amador Salas Maldonado
Journal of Electromagnetic Analysis and Applications, Volume 11, pp 79-99; doi:10.4236/jemaa.2019.116006

Nguyen Duc Truong, Tran Van Nghia, Bui Duc Chinh, Ho Quang Quy
Journal of Electromagnetic Analysis and Applications, Volume 11, pp 135-147; doi:10.4236/jemaa.2019.119009

Ahmed S. I. Amar, Osama M. A. Dardeer, Abdelhaleem A. Zekry
Journal of Electromagnetic Analysis and Applications, Volume 11, pp 148-160; doi:10.4236/jemaa.2019.119010

Mamadou Lamine Ba, Ndeye Thiam, Moustapha Thiame, Youssou Traore, Masse Samba Diop, Mamour Ba, Cheikh Tidiane Sarr, Mamadou Wade, Gregoire Sissoko
Journal of Electromagnetic Analysis and Applications, Volume 11, pp 173-185; doi:10.4236/jemaa.2019.1110012

Abstract:In this work, we propose a method to determinate the optimum thickness of a monofacial silicon solar cell under irradiation. The expressions of back surface recombination velocity depending the damage coefficient (kl) and irradiation energy (øp) are established. From their plots, base optimum thickness is deduced from the intercept points of the curves. The short-circuit currents Jsc0 and Jsc1 corresponding to the recombination velocity Sb0 and Sb1 are determinated and a correlation between the irradiation energy, the damage coefficient and optimum thickness of the base is established.
Kago Ernest Maabong, Kgakgamatso Mphale, Douglas Letsholathebe, Samuel Chimidza, Phenyo Thebenyane
Journal of Electromagnetic Analysis and Applications, Volume 11, pp 187-202; doi:10.4236/jemaa.2019.1111013

Abstract:The compulsion to provide reliable electric power for sustenance of socio-economic development is vital for most of southern Africa states. The demand for the resource in the region is anticipated to escalate in the next couple of decades. However, there is a deleterious effect of fire-induced power disruption which is observed in many countries. The mechanism through which the disruption occurs is currently a subject of current research in electric power distribution. It has been observed that streamer initiated conduction channel provides a means of high voltage electric power flashover. The main purpose of this study is to determine the empirical expression for breakdown electric field strength of vegetation fires. The breakdown field was measured from vegetation fuel (Peltophorum africanum) flames at different combustion temperatures. The data is essential for validation of simulation schemes which are necessary for evaluation of power grid systems reliability under extreme wildfire weather conditions. In this study, Peltophorum africanum fuels were ignited in a cylindrically shaped steel burner which was fitted with a Type-K thermocouple to measure flame temperature. The fuels consisted of dried fine twig (≤0.8 mm Ø) and limb wood (≥10 mm Ø) litter. Two copper pinned-electrodes supported by retort stands were mounted to the burner and energized to a high voltage. This generated a strong electric field sufficient to initiate dielectric breakdown in the flames. The measured electric field strength was plotted against flame temperatures and fit with a non-linear relation to give the empirical relation.
Nikolay N. Grinchik, Galina M. Zayats, Olga V. Boiprav, Kirill V. Dobrego, Volha A. Prykhodzka
Journal of Electromagnetic Analysis and Applications, Volume 11, pp 117-133; doi:10.4236/jemaa.2019.118008

Abstract:A consistent physical and mathematical model of the propagation of electromagnetic waves in an inhomogeneous medium with strong discontinuities of the electromagnetic field at the interface of two media, which is a rough surface, was developed. Mathematical modeling of rough surfaces and their profiles was carried out using fractal geometry, which allows us to display the topology of the object as close as possible to reality. For real heterogeneous rough structures, we have developed a through-counting method that takes into account the continuity of the total current at the interfaces of adjacent media, the effect of induced surface charge and surface current. This approach lets one avoid the necessity to set surface impedances depending on the structure of the field being determined and on the material properties.
Nader Ben Latifa, Taoufik Aguili
Journal of Electromagnetic Analysis and Applications, Volume 11, pp 1-16; doi:10.4236/jemaa.2019.111001