- 1997 - 2001 : Visiting Researcher JST Fellow, NIRIM, Japan
- 2001 - - : Senior Staff Researcher, NIMS, Tsukuba, Japan
- 1996 - 1997 : Visiting Researcher (STA Fellow), NRIM, Japan
- 1995 - 1996 : Visiting Researcher (COE Fellow), NIRIM, Japan
- 1994 - 1995 : Visiting Researcher Max-Plancle, Institute,
- 1993 - 1994 : Visiting Researcher, University of Tsukuba,
- 1983 - 1993 : Junior Researcher, Researcher, Bardin Research
- Germany
- Japan
- Institute, Moscow
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