(Senior Member, IEEE) He received a B.S and M.S. degree from the College of Information and Communication Engineering, Sungkyunkwan University, Republic of Korea, in 1982 and 1984, respectively. He received a Ph.D. degree in electrical engineering from Sungkyunkwan University in 1990. In that same year, he joined Jeju National University, Jeju, the Republic of Korea, as a full-time lecturer. He was a visiting academic at the University of Bath, UK, in 1996, 1998, and 1999. Since March 1992, he has been a professor in the College of Information and Communication, Sungkyunkwan University, where he is currently the Director of the Center for Power Information Technology. His research interests include power system protection, the application of artificial intelligence to protection and control, the modeling/protection of underground cables, and EMTP software.