Minimally privacy-violative system for locating human by ultrasonic radar embedded on ceiling
Nishida, Y., Murakami, S., Toshio, H., and Mizoguchi, H. 2004. Minimally privacy-violative system for locating human by ultrasonic radar embedded on ceiling. Proceedings of IEEE International Conference on Systems, Man and Cybernetics, 1549--1554.
2004