Hashim A. Al Hassan

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OBJECTIVE To determine the prevalence of smoking among medical students at the medical college at King Fahad Medical City in Riyadh, and assess the association between smoking and socio-demographical factors, smoking contacts, reasons for smoking and attempts to quit. MATERIALS AND METHODS Cross-sectional survey in which anonymous, self-administered(More)
This paper aims to get the maximum power from the Photovoltaic generators given I-V characteristics that vary with solar insolation and temperature. Then the paper describes a technique for charging a battery from solar panel at optimum set point condition using ATmega 32 microcontroller. Simulation with Protues software is performed to be compared with(More)
A large number of theoretical and experimental studies have shown that the performance of kerosene combustion increases significantly if combustion is being assisted by the addition of hydrogen to the fuel/air mixture during the combustion process. It reduces the amount of CO, CO 2 and NO x emissions, while increasing the flame stability limits. It also(More)
MEMS capacitive shunt switches with variable resonant frequencies are discussed in this paper. Advantages of such switches are low-loss performance (< 0.5dB), high isolation (> 40dB), High Capacitance ratio and ease of fabrication. The switches are placed over a 45/60/45 (μm) copper CPW and a FEM simulation software (Ansoft HFSS) is used to extract the(More)
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