Theoretical physics

1976~1978 Department of Physics, New York University Faculty Staff
1978~1980 독일 Max-Planck Institut fur Physik Guest Scientist
1981~1982 프랑스 Universite Pierre et Marie Curie Professeur Invite, LPTHE
1982~ 서울대학교 교수
1986 Yale University and Brown대학교 방문교수
1987 이탈리아 International Center for Theoretical
Physics Trieste Scientific Associate and Senior Associate
1990~1997 Council Member, Association of Asia Pacific
Physical Societies, Hong Kong
1992 Programme Director, The XXI International
Conference on Differential Geometric Methods in Physics
Tianjin, China
1993~1994 School of Natural Sciences, Institute for Advanced Study Princeton 교수
1996~1999 Executive Director, Asia Pacific Center for Theoretical Physics, Seoul
1999~ Member, ICTP External Evaluation Team UNESCO Paris, France

1975 Sigma Xi Scientific Research Society of North
America, U.S.A.
1990 대한민국 과학상
1995 Most Admired Man of the Decade, American
Biographical Institute, Raleigh, U.S.A.