S. Aissani, L. Guendouz
CRM2, Institut Jean Barriol, University of Lorraine, Vandoeuvre-lès-Nancy, France
Mesures et architectures électroniques, University of Lorraine, Vandoeuvre-lès-Nancy, France
Nuclear Quadrupole Resonance (RQN) is a radio frequency (RF) spectroscopic technique that is used to detect quadrupole nuclei such as Nitrogen-14. NQR was found to be a good candidate for detecting narcotics, explosives and medicines . However, due to its low sensitivity the use of NQR is still limited. One way to increase the sensitivity is to improve the RF coil by means of a better RF ...
B. Lepers , G. Link , J. Jelonnek 
 Karlsruhe Institute of Technology, Institute for Pulsed Power and Microwave Technology, Karlsruhe, Germany
Introduction: The use of microwave energy for thermal cracking (from thermal stress and water pore pressure) of lignite-coal briquettes increases the lignite friability  and is beneficial for later chemical treatment inside a gasifier (for methanol production for example). An adequate use of microwave energy can improve the overall efficiency of the gasification process based on lignite ...
S. Almousa , J. A. Deibel ,
 Department of Physics, Wright State University, Dayton, OH, USA
While low frequency light is poorly transmitted through an aperture in a conductive thin film, in the phenomenon known as extraordinary optical transmission (EOT), a narrow band of selected frequencies are transmitted when incident on an array of subwavelength periodic apertures where the resonant frequency is determined by the geometry of the aperture array and the metal-dielectric interface ...
叶菁华 , 朱铧丞 
微波辅助生物柴油生产越来越受到了人们的关注，但是，微波的不均匀加热也影响了微波辅助生物柴油的大规模生产。研究表明，连续流微波加热器可以有效地解决微波辅助生物柴油的批量生产问题，螺旋推进器也可以改善加热均匀性，于是仿真带有螺旋推进器的连续流微波加热器的生物柴油生产过程，有利于优化连续流微波加热器的设计，对提高微波辅助生物柴油生产效率有重要的意义。 本文使用了电磁场、旋转机械流、流体传热和化学反应接口。电磁场中的介电系数是关于温度和物质浓度的函数，流体的热参量由流体各组分的质量比等效所得。计算采用步进求解的方法，先在频域求解电磁场，所得的耗散功率代入流体传热，再将求解得到的温度和浓度用于更新介电系数，如此类推直至计算时间结束。 图1为有无螺旋推进器的连续流微波加热器的纵截面温度分布图，可见由于螺旋推进器的搅拌作用，流体的温度均匀性得到了很好的提高 ...
J. Jimenez-Lozano, P. Vacas-Jacques, W. Franco
Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
Radiofrequency (RF) technology offers unique advantages for noninvasive selective heating of relatively large volumes of tissue. In this work, we present a mathematical model for selective non-invasive, non-ablative RF heating of cutaneous and subcutaneous tissue (with detailed fiber septa structures) including their thermo-elastic response. Our analysis shows that the fiber septa architecture ...
Self-Consistent Modeling of Thin Conducting Wires and Their Interaction with the Surrounding Electromagnetic Field
ABB AB, Corporate Research, Västerås, Sweden
It is demonstrated how the RF Module of COMSOL Multiphysics® can be used to approximately model thin conducting wires or cables and how they interact with a surrounding electromagnetic field. Despite being non-stringent the method can reasonably well predict currents induced by an applied electromagnetic field in wires, and networks of wires, as well as fields radiated from current-carrying ...
E. C. Luz
Universidade Federal do Pará, Belém, PA, Brazil
The Marine Controlled Source ElectroMagnetic (marine CSEM) is a geophysical method used by the oil industry to investigate resistive targets in the sediments under the ocean floor. In this work we simulate marine CSEM data including 1D, 2.5D and 3D modeling. The results obtained with COMSOL Multiphysics show themselves as a promising tool for the studies of electromagnetic methods in prospecting ...
H. Arab, F. Afshar, C. Akyel
École Polytechnique de Montréal, Montréal, QC, Canada
Department of Electrical and Computer Engineering, McGill University, Montréal, QC, Canada
In this project a two dimensional second order nodal and linear edge elements programming model for homogeneous waveguide is developed and simulated in MATLAB® software Environment. The objective is to reduce or eliminate spurious solutions and to cater for any arbitrarily shaped waveguides using triangular edge elements. The formulation is developed using the E-Field and to make use of the ...
M. Csete , A. Szenes , L. Zs. Szabó , G. Szabó , T. Csendes , B. Bánhelyi ,
 Department of Optics and Quantum Electronics, University of Szeged, Szeged, Hungary
 Institute of Informatics, University of Szeged, Szeged, Hungary
Detecting light emitted by fluorescent molecules with resolution down to single photon is an important problem in various fields of sciences and applications, such as solid-state physics, quantum information processing and medicine. The detection probability can be improved via enhancement of excitation and emission. Enhancement both of these processes can be reached by localized surface plasmon ...
A. Singh, S. Maini, and M. Anupma
 Department of Electrical & Instrumentation Engineering, Sant Longowal Institute of Engineering and Technology , Longowal (Deemed University), Punjab, India
The electromagnetic fields have a great influence on the behavior of all the living systems. The human body itself is a source of naturally generated electric and magnetic fields. When external signals of comparable strength flows through the human body; the nature of changes that such signals could induce in natural electrochemical processes and voltage is a subject of interest and of ...