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1979. 8 : ¼º±Õ°ü´ëÇб³ °æÁ¦Çаú, Çлç
1986. 6 : OHIOÁÖ¸³´ëÇб³ °æÁ¦Çаú, ¼®»ç
1988. 2 : OHIOÁÖ¸³´ëÇб³ °æÁ¦Çаú ¹Ú»ç°úÁ¤¼ö·á
1996. 2 : ºÎ»ê´ëÇб³ ¹«¿ªÇаú, °æÁ¦ÇÐ ¹Ú»ç
1986. 1 ~ 1987 .8 : THE OHIO STATE UNIVERSITY U.S.A, °ÀÇÁ¶±³
1992. 3 ~ 1993. 10 : °æ¿µ´ëÇÐ ¹«¿ªÇаú ÇаúÀå
1996. 7 ~ 1998. 8 : °æ¿µ´ëÇÐ ¹«¿ªÇаú ÇаúÀå
1988. 3 ~ ÇöÀç : µ¿¾Æ´ëÇб³ ±³¼ö