Selected Visits

Computer Science Laboratory, SRI International, Menlo Park, California, USA, Observer, May-June 2017, and International Fellow, September 2015 - September 2016 (sabbatical year).
The University of Manchester, Manchester, England, UK, March-April 2017.
Universität Koblenz-Landau, Koblenz, Germany, September 2014 and June 1999.
Max-Planck-Institut für Informatik, Germany, June 2014.
Microsoft Research, Redmond, Washington, USA, Gratis Visitor, June 2013, and Visiting Research Scholar, May - June 2008.
University of Illinois at Urbana-Champaign, Urbana-Champaign, Illinois, USA, June 2013.
University of New Mexico, Albuquerque, New Mexico, USA, June 2013.
King's College, London, England, UK, July 2012.
Institute of Software, Chinese Academy of Sciences, Beijing, PR China, June 2011.
Tsinghua University, Beijing, PR China, May 2007.
Università degli Studi di Genova, Genova, Italy, June - July 2001.
Università degli Studi di Roma "La Sapienza", Roma, Italy, May - June 2000.
Technische Universität Dresden, Guest Professor, Dresden, Germany, May - June 1999.
Argonne National Laboratory, Argonne, Illinois, USA, June 1998 and January - February 1993.
Artificial Intelligence Center, SRI International, Menlo Park, California, USA, October 1996.
National Taiwan University, Taipei, Taiwan ROC, March 1989.
Université Paris XI, Orsay, France, September - December 1988.