Raphael Danchin, Universite Paris Est Creteil, France, and Universite Gustave Eiffel, Champs-sur-Marne, France. Matthias Hieber, Technische Universitat Darmstadt, Germany. Piotr Boguslaw Mucha, University of Warsaw, Warszawa, Poland. Patrick Tolksdorf, Karlsruhe Institute of Technology, Germany