Nada Matta is Professor at the University of Technology of Troyes in France. Her work focuses on techniques in knowledge engineering and management, in particular how to handle cooperative activities. She has been head of "Scientific group of supervision, and security of complex systems" for 5 years, head of the department of "Human, Environment and ICT" for 1 year, and head of department of "Information Systems and Telecom" for 2 years. Hassan Atifi is Associate Professor in Communication Studies at the University of Technology of Troyes in France. His research interests include Ethnography of Computer-Mediated Communication, Cultural Variation in CMC, Technology and Emerging Media and Communication and Knowledge Engineering. Guillaume Ducellier is a Researcher and Teacher at the University of Technology of Troyes in France. He is responsible for the training of Engineers in Mechanical Systems and performs his research within the Laboratoire de Systèmes Mécaniques et d'Ingénierie Simultanée (LASMIS).