Dr. Hrachya Nersisyan1986-1987 Junior Scientific Researcher, Laboratory of Radiation Physics, YerevanPhysics Institute, Yerevan, Armenia1987-1989 Pre-doctoral position, Department of Plasma Theory, P.N. Lebedev PhysicalInstitute, Moscow, Russia1993 Dr. of Physical and mathematical sciences, P.N. Lebedev Physical Institute,Moscow, Russia1993-1994 Scientific Researcher, Institute of Radiophysics & Electronics, Ashtarak,Armenia1997 Guest Researcher, Laboratoire de Physique des Gaz et des Plasmas,Université Paris-XI, Orsay, France1999 DAAD (German Academic Exchange Service) Fellowship, Institut fürTheoretische Physik II, Universität Erlangen-Nürnberg, Erlangen, Germany2001-2002 Alexander von Humboldt Fellowship, Institut für Theoretische Physik II,Universität Erlangen-Nürnberg, Erlangen, Germany2004-2005 Guest Researcher, Institut für Theoretische Physik II, Universität Erlangen-Nürnberg, Erlangen, Germany1994- Senior Scientific Researcher, Institute of Radiophysics & Electronics,Ashtarak, ArmeniaProf. Dr. Christian Toepffer1967 Dr. phil. nat.1973-1974 Associate Professor, University Frankfurt/Main1974-1980 Professor of Theoretical Physics, University of Witwatersrand,Johannesburg, South Africa1980- Professor of Theoretical Physics, University of ErlangenDr. Günter Zwicknagel1994 Dr. rer. nat. in Physics at the University of Erlangen1995-1997 Research scholar at the Laboratoire de Physique des Gaz et des Plasmas,Orsay, France1997-2000 Research assistant at the Institute of Theoretical Physics II, University ofErlangen2000- Researcher and lecturer at the University of Erlangen