A. A. S. Mohamed

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The purpose of this study is to determine the ocular manifestations of systemic lupus erythematosus and its correlation with the disease activity. Fifty-two lupus patients and 20 healthy controls were included in this study. All patients have undergone complete rheumatological, neurological, and ophthalmic examination including visual acuity, slit-lamp(More)
The work describes an automated method of tracking dynamic ultrasound images using a normalized cross-correlation algorithm, applied to the patellar and gastrocnemius tendon. Displacement was examined during active and passive tendon excursions using B-mode ultrasonography. In the passive test where two regions of interest (2-ROI) were tracked, the(More)
The purpose of this study was to assess the toxicoses and antitumor activity of metronomic chlorambucil at a dosage of 4 mg m(-2) daily in dogs with naturally occurring cancer. Thirty-six dogs were enrolled in the study. The protocol was well tolerated with no grade 3 or 4 toxicoses noted. Complete remission was achieved, and lasted over 35 weeks in three(More)
This paper presents a novel smart-PID controller for optimal control of DC-DC boost converter used as voltage controller in PV systems. This proposed controller maximizes the stable operating range by using genetic algorithms (GA) to tune the PID parameters ultimately at various loading conditions. Then, a fuzzy logic approach is used to add a factor of(More)
Accurate and efficient models can assist designers to predict and optimize the system performance during system development. This paper presents a physics-based 2-D finite-element model (FEM) for bidirectional inductive wireless power transfer system (BIWPTS) for electric vehicle (EV) applications. The proposed model is based on a co-simulation platform(More)
Electromagnetic emission produced by high frequency switching current of inductive components has an adverse effect on sensitive devices in power converters. This paper investigates the effect of components placement on the radiated emissions in printed circuit board (PCB). The goal of this research is to minimize the electromagnetic interference (EMI) on(More)
Inter-turn short-circuit (ITSC) fault is one of the most typical fault in different types of magnetically coupled circuits such as transformers and rotating or linear electrical machines. This paper presents a general study to approach the ITSC understanding and modeling as long as the circuit can be represented in state-space (SS) equations. The ITSC in(More)
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