Dominique Luzeaux graduated from École Polytechnique (1987), École Nationale Supérieure des Techniques Avancées (1989), completed a PhD from University Paris XI (1991) and a Faculty Habilitation in 2001. He has been employed by the Ministry of Defense for over 20 years. He was Director of the Complex System Engineering Department from 2002 to 2004, and Chief Information Officer from 2005 to 2007. He is currently Deputy Director of the service in charge of the C4ISR (Computerized Command, Control, Communications, Intelligence, Surveillance and Reconnaissance) programs. He has written over 60 articles in international conferences and journals, and teaches robotics, theoretical computer science and system engineering at graduate level. He has co-authored a book on nanotechnology and Microsystems published in 2007 by Éditions du Félin. Jean-René Ruault completed a master degree in experimental social psychology, and a graduate-level training in industrial engineering. After over 10 years as a consultant on software engineering and human-computer interaction, he was hired in 2004 by the Ministry of Defense as an expert in systems engineering, standardization and human factors. He has published several articles on system engineering and human-computer interactions, and was co-chairman of the ERGO-IA'06 conference.