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This paper describes the design and preliminary experimental results of a novel photoacoustic imaging system which cascades a light source behind a near infrared (NIR) transparent ultrasonic transducer array and illuminates the image target through the transducer chip. With this in-line arrangement between the light source and the ultrasonic transducer, no time-consuming light-to-ultrasound alignment...
In this paper, a vision system for monitoring driver's vigilance is presented. The level of vigilance is determined by integrating a number of facial parameters. In order to estimate these parameters, the facial features of eyes, mouth and head are first located in the input video sequence. The located facial features are then tracked over the subsequent images. Facial parameters are estimated during...
Photovoltaic and photoconductive properties of ultra-thin a-Si/SiO2 multilayers grown by PECVD and annealed at 1150degC were studied. A quantum yield greater than one is observed due to secondary carrier generation from interface trap states.
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