1. Department of Sciences and Methods for Engineering, University of Modena and Reggio Emilia, Reggio Emilia, Italy and System Logistics, Fiorano Modenese, Italy
2. Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ, USA
3. Department of Sciences and Methods for Engineering, University of Modena and Reggio Emilia, Reggio Emilia, Italy