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In usual an electric-powered wheelchair is controlled by the joystick. However, joystick control cannot be applied when the user performs certain tasks such as cooking that require holding an object with both hands. We have developed a wheelchair control system that uses the direction of the user's face as the direction-control input for the wheelchair. The system is composed of an electric-powered...
XY stages driving an electron beam (EB) mastering system for high density optical recording has been designed and prototyped. This system has some unique techniques for subnanometer accuracy, i.e. super-polygon approximation for spiral writing, auto focus adjusting, highly precise position-detecting, and a 32-bit data format. The system demonstrated fine pits writing with a small size of 50x80 nm...
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