• Kelvin-Helmholtz Instability forms in cavitating microchannels. Governs Cavitation Cloud Shedding Microchannels. This is the third mechanism of cavitation cloud shedding. High Speed and X-ray visualization was performed. Simple model for flow developed. The paper shows inside a micro-Venturi channel. While initial aim study to establish supercavitating conditions micro-Venturi, yet we found t...

the present study was conducted to investigate the impacts of retrofitted cng vehicles on airpollutant emissions in tehran over a 20 years period using available statistical data, precise automobile tests, data analysis, and leap software. the obtained results revealed an increase in air pollutant emissionsincluding co (equal to 1030.77 thousand tons), nox (equal to 1030.77 thousand tons), thc ...

the present study was conducted to investigate the impacts of retrofitted cng vehicles on airpollutant emissions in tehran over a 20 years period using available statistical data, precise automobile tests, data analysis, and leap software. the obtained results revealed an increase in air pollutant emissionsincluding co (equal to 1030.77 thousand tons), nox (equal to 1030.77 thousand tons), thc ...

flapping-wing robotic insects are small, highly maneuverable flying robots inspired by biologicalinsects and useful for a wide range of tasks, including exploration, environmental monitoring, searchand rescue, and surveillance. recently, robotic insects driven by piezoelectric actuators have achievedthe important goal of taking off with external power; however, fully autonomous operation requir...

OBJECTIVE To determine the rate of handheld mobile telephone use among motor vehicle drivers. DESIGN AND SETTING Observational study of motor vehicle drivers at three times (10: 00-11: 00; 14: 00-15: 00; 17: 00-18: 00) on three consecutive Fridays in October 2002 at 12 highway sites in metropolitan Melbourne. MAIN OUTCOME MEASURES Rates of mobile phone use overall and by sex and age group, ...