Abstract-The essential cause of Multiple Sclerosis (MS) remains to be unknown until present. Although the relevance of racial, genetic, immunological and environmental causal factors has been accepted and expressed by various researchers, there has not been an elaborate study as to the essential cause of MS. This study aims to explain the importance of the environmental causal factor on the occurrence of MS compared to the racial, immunological and genetic factors. In this study, especially the Extreme Low Frequency (ELF) electromagnetic fields and electromagnetic fields at a frequency band (10 9 -10 13 ) Hz in terms of dielectrophoretic effect on myelin in dispersive gray matter and white matter are regarded as the essential causal factor of MS regardless of the fact, whether their sources are artificial or natural. There are epidemiological and experiment-based studies that support this view. In order to support my view, I made use of several comparative studies and obtained computational data. Dielectrophoretic force in the human body, especially in gray and white matter can affect on the myelin basic proteins and be the cause of accumulating them.

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This study aims to elucidate the production mechanism of cytokine-like formations secreted from T cells and similar cells by electromagnetic modeling techniques. Three Hertz dipole antennas polarized in arbitrary directions were placed without touching each other at the center of spherical T-cell models to test the Canbay hypothesis about the formation mechanism of cytokines (CHAFMOC) on T-cell surfaces. A dielectrophoretic force field was created within the gelatin layer of the T-cell model. The prepared control and electromagnetically stimulated T-cell model samples were incubated in water in a glass container in a Faraday cage for the specified period and then photographed. At the end of the experiments, cytokine-like formations were observed in the samples, depending on their contents. The results of these experiments, carried out in accordance with the CHAFMOC, show that a dielectrophoretic force is the main cause of the cytokine formation and secretion mechanism in the outer layers of rough T-cell models. Given these results, new approaches and developments may be expected to better our understanding of the immune system in the subjects of cell science, pharmacology, and bioengineering.

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In this paper, effects of frequency dispersive dielectric properties of a half-spherical breast phantom model on breast cancer tumor detection capability of the microwave radar-based imaging system, currently being developed at the Scientific and Technological Research Council-BILGEM-UEKAE, are investigated by simulation studies. An ultra wideband (UWB) bow-tie antenna array surrounding the breast has been designed in the presence of the breast phantom. The designed antenna operates efficiently across the band from 1 GHz to 8 GHz and it's assumed to be immersed in a coupling medium to get a good impedance matching with the breast. Fidelity factor of the case with the dispersive breast phantom is found to be 4.14% less than the non-dispersive case, due to increasing pulse distortion in dispersive dielectric tissues. Images are formed by using delay-and-sum (DAS) algorithm for the detection of spherical tumor with 2 mm diameter. Imaging results of the case with the dispersive breast phantom present signal reduction of 0.628 dB in the tumor response level as well as faulty locating of the tumor in the image, as compared to the successful results of the non-dispersive case. A better imaging algorithm compensating the dispersive effects will be used in the future.