| Gerlad Pollack , University of Washington, Washington, , Dec. 3-6, 2015 |
| Ali Asadian , Technische Universität Wien, Wien, Austria, Nov. 23 - Dec. 31, 2015 |
| Ghadir Jafari , Ferdowsi Mashhad University, Mashhad, Iran, Aug. 26-30, 2015 |
| Hadi Rahmani , Aix Marseille Universite, , France, Aug. 25-27, 2015 |
| Martin Dominik , University of St Andrews, St Andrews, United Kingdom , Aug. 25 - Sep. 5, 2015 |
| Ahmad Ghodsi , Ferdowsi University of Mashhad, Mashhad, Iran, Aug. 25 - Sep. 15, 2015 |
| Azadeh Keivani , Pennsylvania State University, , USA, Aug. 18-20, 2015 |
| Yashar Akrami , Institute for Theoretical Physics,University of Heidelberg, Heidelberg, Germany, Aug. 16-17, 2015 |
| Hamid Reza Afshar , University of Groningen , Groningen, Netherlands, July 21-23, 2015 |
| Amir Aghamousa , Asia Pacific Center for Theoretical Physics, , South Korea, June 29, 2015 |
| Bing-Sui Lu , University of Ljubljana,, Ljubljana, Slovenia, May 8-19, 2015 |
| Majid Mosayebi , University of Oxford , Oxford, UK, May 3 - Sep. 3, 2015 |
| Mehrdad Mirbabayi , Institute for Advanced Study, Princeton, USA, April 27 - May 14, 2015 |
| Ye Wang , National University of Singapore, , Singapore , March 7-12, 2015 |
| Cumrun Vafa , Harvard University, , USA, Feb. 28 - March 4, 2015 |
| Francesco Fucito , University of Rome, Tor Vergata & INFN, Rome, Italy, Feb. 2-8, 2015 |
| Marco Billo , University of Turin & INFN, Turin, Italy, Feb. 2-8, 2015 |
| Alberto Lerda , University of Turin & INFN, Turin, Italy, Feb. 2-8, 2015 |
| Bahram Mobasher , University of California, Riverside, USA, Jan. 24-31, 2015 |
| Reynier Peletier , Kapteyn Insitute, University of Groningen, Hague, Netherlands, Jan. 24-31, 2015 |
| Feng Yuan , Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shandong Province, China, Jan. 24-28, 2015 |
| Areg Mickaelian , Byurakan Astrophysical Observatory (BAO), Yerevan, Armenia, Jan. 23-28, 2015 |
| Gary Allan Mamon , Institut dâ??Astrophysique de Paris , Paris, France, Jan. 21-29, 2015 |
| Joseph Silk , Institut dâ??Astrophysique de Paris , Paris, France, Jan. 21-29, 2015 |
| Alvio Renzini , Instituto Nazionale di Astrofisica (INAF - National Institute of Astrophysics), Rome, Italy, Jan. 17-31, 2015 |
| David Neilson , University of Camerino, Camerino, Italy, Jan. 15 - Feb. 15, 2015 |
| Glenn Pierre Barnich , Université Libre de Bruxelles & International Solvay Institutes, Bruxelles, Belgique, Jan. 13 - Feb. 22, 2015 |
| Fatemeh Tabatabaei , Max-Planck-Institut for Astronomy(MPIA), Heidelberg, Germany, Dec. 30, 2014 - Jan. 28, 2015 |
| Bahman Roostaei , Indiana University, Indianapolis, United States, July 23, 2014 - May 21, 2015 |
| Bahman Davoudi Dehaghi , British Columbia Centre for Disease Control (BCCDC), Vancouver, Canada, July 23, 2013 - Sep. 22, 2015 |
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