A method of acoustic landmark extraction for mobile robot navigation. - Joong Hyup Ko; Wan-Joo Kim; Myung Jin Chung (IEEE Trans. Robotics Autom., 1996)

InP Gunn Diodes with Current Limiting Contact for High Efficiency Gunn Oscillators. - Mi-Ra Kim; Jin Koo Rhee; Chang-Woo Lee; Yeon-Sik Chae; Jae-Hyun Choi; Wan-Joo Kim (IEICE Trans. Electron., 2010)