A stereo vision based virtual reality game by using a vibrotactile device and two position sensors. - Ho-joong Yong; Jongwon Back; Tae-Jeong Jang (SIGGRAPH Research Posters, 2006)

A ball type vibro-tactile space mouse using one web camera. - Dong-Jin Yoo; Ho-joong Yong; Jongwon Back; Tae-Jeong Jang (SIGGRAPH Posters, 2007)