Dr. Hrachya Nersisyan 1986-1987 Junior Scientific Researcher, Laboratory of Radiation Physics, Yerevan Physics Institute, Yerevan, Armenia 1987-1989 Pre-doctoral position, Department of Plasma Theory, P.N. Lebedev Physical Institute, Moscow, Russia 1993 Dr. of Physical and mathematical sciences, P.N. Lebedev Physical Institute, Moscow, Russia 1993-1994 Scientific Researcher, Institute of Radiophysics & Electronics, Ashtarak, Armenia 1997 Guest Researcher, Laboratoire de Physique des Gaz et des Plasmas, Université Paris-XI, Orsay, France 1999 DAAD (German Academic Exchange Service) Fellowship, Institut für Theoretische Physik II, Universität Erlangen-Nürnberg, Erlangen, Germany 2001-2002 Alexander von Humboldt Fellowship, Institut für Theoretische Physik II, Universität Erlangen-Nürnberg, Erlangen, Germany 2004-2005 Guest Researcher, Institut für Theoretische Physik II, Universität Erlangen- Nürnberg, Erlangen, Germany 1994- Senior Scientific Researcher, Institute of Radiophysics & Electronics, Ashtarak, Armenia Prof. Dr. Christian Toepffer 1967 Dr. phil. nat. 1973-1974 Associate Professor, University Frankfurt/Main 1974-1980 Professor of Theoretical Physics, University of Witwatersrand, Johannesburg, South Africa 1980- Professor of Theoretical Physics, University of Erlangen Dr. Günter Zwicknagel 1994 Dr. rer. nat. in Physics at the University of Erlangen 1995-1997 Research scholar at the Laboratoire de Physique des Gaz et des Plasmas, Orsay, France 1997-2000 Research assistant at the Institute of Theoretical Physics II, University of Erlangen 2000- Researcher and lecturer at the University of Erlangen