| Cumrun Vafa , Harvard University, Department of Physics , Cambridge, USA, Nov. 10-17, 2002 |
| B. Mohammadi , Institut Universitaire de France and University of Montpellier, France , Montpellier, France, Nov. 8-15, 2002 |
| M. Sahimi , University of Southern California, Los Angeles, USA, Oct. 29, 2002 |
| A. Plantinga , University of Notre Dame , Indiana, USA, Oct. 20, 2002 |
| A. Miamee , Hampton University, Hampton, USA, June 10 - Sep. 3, 2002 |
| W. Bruns , Universität Osnabrück, Osnabrück, Germany, May 26-30, 2002 |
| H. Holm , Matematisk Institut, Universitetsparken 5, Copenhagen, Denmark, May 23-31, 2002 |
| A. Frankild , Matematisk Institut, Universitetsparken 5, Copenhagen, Denmark, May 23-31, 2002 |
| L. Melkersson , Linkoping University, Linkoping, Sweden, May 23-31, 2002 |
| E. E. Enochs , University of Kentucky, Lexington, USA, May 23-31, 2002 |
| H. B. Foxby , University of Copenhagen - Institute for Mathematical Sciences, Copenhagen, Denmark, May 23-31, 2002 |
| J. Herzog , Universität GH-Essen, Essen, Germany, May 23-31, 2002 |
| L. L. Avramov , University of Nebraska-Lincoln, Lincoln, USA, May 23 - June 5, 2002 |
| Hartmut Gemmeke , Institute for Data Processing and Electronics (FZK), Karlsruhe, Germany, May 16-29, 2002 |
| W. Eppler , Research Center Karlsruhe, Karlsruhe, Germany, May 16-29, 2002 |
| John Altee Hertz , Nordita (Nordic Institute for Theoretical Physics), , Denmark, May 12-19, 2002 |
| F. Sharifi , Ryerson Polytechnic University, Toronto, Canada, May 5 - Sep. 6, 2002 |
| Freydoon Mansouri , University of Cincinnati, Cincinnati, USA, April 19 - May 14, 2002 |
| Nodar Tsintsadze , Institute of Physics, Tbilisi, Georgia, March 6 - July 7, 2002 |
| I. Swanson , New Mexico State University , Las Cruces, USA, Jan. 6-28, 2002 |
| S. Hedayat , University of Illinois at Chicago, Chicago, USA, Dec. 16, 2001 - Jan. 5, 2002 |
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