By Association Polyray Posted 30 August 2017 In Symposium 2017-08-302017-08-30http://www.polyray.fr/wp-content/uploads/2016/11/logo-polyray-h120.pngPolyrayhttp://www.polyray.fr/wp-content/uploads/2016/11/logo-polyray-h120.png200px200px 0 Every year, at the Polyray meeting, the association awards a prize for the best communication. For the year 2017, the winner is: Raymond Hajj, C2MA, Ecole des Mines d’Alès.