Jean Salen?on is Emeritus Professor at ?cole polytechnique and ?cole des ponts et chaussées, ParisTech, France. Since 2009 he has been a member of the Administrative Board of CNRS (Paris, France). He has received many awards including the L?gion d-Honneur (Commander), Ordre National du M?rite (Officer) and Palmes Acad?miques (Commander). His research interests include structure analysis, soil mechanics and continuum mechanics.