1. Civil and Industrial Engineering, University of Rome, Sapienza,Rome,Italy
2. University of Macedonia,Department of Applied Informatics,Thessaloniki,Greece
3. National and Kapodistrian University of Athens,Department of Physics,Athens,Greece
4. School of Engineering, Universidad de la República,Montevideo,Uruguay
5. Escuela Técnica Superior de Ingenieros Informáticos, Universidad Politécnica de Madrid,Madrid,Spain
6. Université de Montréal,Montréal,Canada