1. 20.06.2005-23.6.2005: University of Science and Technology, Tampere, Finland, invited by Prof. Dr. Sirkka-Liisa Eriksson-Bique.
2. 02.04.2006-15.04.2006: Konrad-Zuse-Institut für Informationstechnik Berlin, Germany, invited by Prof. Dr. Gerd Tesckhe.
3. 17.07.2006-28.07.2006: Bauhaus-Weimar University, Germany, invited by Prof. Dr. Klaus Gürlebeck.
4. 02.03.2008-15.03.2008: University of Leeds, Leeds, United Kingdom, invited by Dr. Vladimir Kisil.
5. 26.04.2009-30.04.2009:Katholieke Universiteit Leuven, Belgium, invited by Dr. Soeren Krausshar.
6. 31.05.2009-01-03.06.2009: Ghent State University, Belgium, invited by Prof. Dr. Franciscus Sommen.
7. 20.07.2009-25.07.2009: University of Leeds, Leeds, United Kingdom, invited by Dr. Vladimir Kisil.
8. 06.07.2010-09.07.2010: University of Paderborn, Germany, invited by Dr. Soeren Krausshar.
Forthcoming:
1. 01.11.2011-24.11.2011: NuHAG, University of Vienna, Austria, invited by Prof. Dr. Hans Georg Feichtinger.
2. 10.11.2011-13.11.2011: Attendance of Heinz von Foerster congress 2011, University of Vienna, Austria.
3. 05.03.2012-09.03.2012: Universidad de La Laguna, Tenerife, Spain, HCAA 2012 meeting.
Conferences (to be confirmed):
1. ICNPAA 2012 Congress, July 11-14 2012, Vienna University of Technology
2. IWOTA 2012, July 16-20 2012, University of New South Wales, Sydney, Australia

