1. University of Aveiro , Centre for Mechanical Technology and Automation (TEMA), Department of Mechanical Engineering , Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
2. Hasselt University - Campus Diepenbeek Agoralaan Gebouw H - B-3590 Diepenbeek, Kantoor H-B103b, Belgium
3. University of Salerno , Department of Civil Engineering , via Giovanni Paolo II 132, Fisciano , Italy