| 7-8/07 |
Digipen Institute of Technology
Redmond, Washington, USA |
| 7/99 |
The Perimeter Institute
Waterloo, Canada |
| 7/99 |
Universiteit Leiden
Instituut-Lorentz for Theoretical Physics, Leiden, The Netherlands |
| 7/99 |
Scuola Internazionale Superiore di Studi Avanzati
Trieste, Italy |
| 8/98 |
Reed College
Department of Physics, Portland, OR, USA |
| 6/97 |
Reed College
Department of Physics, Portland, OR, USA |
| 9/93 |
Lancaster University
School of Physics & Materials, Lancaster, UK |
| 9/90 |
University of York
Department of Mathematics, York, UK |
| 7/90 |
University of Crete
Department of Physics
Crete, Greece |
| 6-8/88 |
University of York & University of Durham
Department of Mathematics, York, UK
& Department of Mathematical Sciences, Durham, UK
Science & Engineering Research Council, Visiting Scholar |
| 11/87 |
University of Poona
Pune, India
Council for the International Exchange of Scholars, Indo-American
Fellow |
| 8/87 |
Raman Research Institute
Bangalore, India
Council for the International Exchange of Scholars, Indo-American
Fellow |
| 9/86 |
Imperial College
The Blackett Laboratory, London, UK |
| 1-6/80 |
University of California, Santa Barbara
Institute for Theoretical Physics, Santa Barbara, CA, USA |