Overseas Assignments
- Invited Researcher (April. 2018) NSU and NTU Singapore
- Invited Researcher (Sep. 2017) University of Surrey and University of Southampton, UK
- Visiting Researcher (Jan. 2013) International Centre for Theoretical Physics, Italy
- Visiting Researcher (Dec. 2012) RMUTT, ThanyaburiThailand
- Invited Researcher (Aug - Sep, 2011) EHPRG Budapest, Hungary
- Visiting Researcher (May - June 2006) Michigan Technological University, USA
- Visiting Researcher (Dec. 2001 = June 2002) Shizuoka University on SVBL Fellowship of Ministry Science & Technology, Japan
- Visiting Researcher (May 2001) International Centre for Theoretical Physics, Italy
- Post Doctoral Fellow (Jan - Nov. 1999) Uppsala University, Sweden