Magdi Ibrahim

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—In this paper, a simple model for the UHF low power rectifier circuit is proposed. Using a novel approach to model the rectifier current waveform, simple analytical equations are derived. The output dc voltage and the efficiency of the rectifier are derived analytically. Simulation results of the rectifier using actual models are very close to those(More)
BACKGROUND Hyperhidrosis can cause significant professional and social handicaps. Thoracic endoscopic sympathectomy has become the surgical technique of choice for treating intractable palmar hyperhidrosis and can be performed through multiple ports or a single port. This prospective study compares outcomes between the two methods. METHODS The study(More)
OBJECTIVE To determine the relative hardness of GI-based restorative materials using both LED and QTH curing lights at different post-irradiation intervals. METHODS Four restorative materials (Z250, Beautifil, Dyract AP and Fuji II LC) with shade A3.5 were tested in conjunction with three LCUs (Astralis 3, Blue phase and Radii). The specimens were(More)
The opinions expressed herein are those of the authors and do not necessarily reflect the views of USAID. Acknowledgement This report is the result of close collaboration between the FRONTIERS Program, the Clinical Services Improvement Project and the Cairo Demographic Center, with financial support from the USAID Mission in Cairo. The authors wish to thank(More)
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