This paper presents a method to evaluate the interactions between a radio-frequency power transfer link and biological tissues. First we analyze the propagation of a plane wave model at the skin interface to evaluate the frequency that optimize the transfer ratio. We then use the Finite-Difference Time-Domain method to calculate the exact electromagnetic fields propagation in a discrete 3D space and time for a box brain model with an inductive emitting antenna. The results exhibit the electric field pattern in the antenna axis plane and ip the back of the head. They show for an optimize frequency carrier (2OMHz) that the attenuation of electric field strength is 15dB and that most of the energy is reflected at the air-tissue interface.This paper presents a general method to perform the power transfer link investigation. First, the section I1 describes the global visual stimulation system. Section 111 explains the power supply problematic for implanted electronic devices. In section IV, we expose the method to evaluate the optimal power transfer frequency (A) and the Finite-Difference Time-Domain method to calculate the exact electromagnetic propagation in space (B) then the subsection C contains the simulation parameters for a box brain model. Finally, the preliminary results are presented in section V and discussed in section VI.

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Abstract-The stability and dispersion performance of the recently developed Battle-Lemarie multiresolution time-domain schemes is investigated for different stencil sizes. The contribution of wavelets is enhanced and analytical expressions for the maximum allowable time step are derived. It is observed that larger stencils decrease the numerical phase error, making it significantly lower than finite-difference time domain for low and medium discretizations. The addition of wavelets further improves the dispersion performance for discretizations close to the Nyquist limit, though it decreases the value of the maximum time step, guaranteeing the stability of the scheme.

This article presents the results of a study to determine the impact of a cyber threat education and awareness intervention on changes in user security behavior. Subjects were randomly assigned to one of two introductory lectures about cyber threats due to poor password management. The low-information condition was based on very general background information on passwords and computer security, while the high-information condition included very detailed and specific information on the threats to subjects' use of e-commerce. The pre=post-treatment design was a single, betweensubjects factor (information level-low=high), repeated measures study, with password strength at Time 1 and password strength at Time 2 used to measure change in security behavior over a period of two weeks. The study found that at Time 1, participants possessed no significant differences in the strength of their passwords. Two weeks later, the password strength of the participants in the low-information condition was not statistically different than their initial levels, while subjects in the high-information condition demonstrated password ratings 36 percent stronger (t ¼ 17.0, p ¼ .000). It is concluded that when users were educated of the threats to e-commerce and trained about proper security practices, their behavior could be changed to enhance online security for themselves and the firms where they are employed.

Military communications networks can leverage much of the millimeter-wave (mm-wave) technology being investigated and developed for 5G cellular but require special attention to the unique military requirements. This paper highlights the special communications' requirements of specific military local area networks and discusses how higher band mm-wave technology can contribute to high data rates and simultaneously achieve covertness. Adaptive tuning for varying atmospheric absorption meets the military requirements for quickly adjusting covert communication zones to accommodate potentially rapid movements of network nodes, dynamic output power constraints, and changing environmental conditions. INDEX TERMS 5G, military communications, millimeter-wave propagation.