1. University of Salerno, Department of Industrial Engineering, via Giovanni Paolo II, 132, 84084 Fisciano SA, Italy
2. University of Basilicata, School of Engineering, Viale dell’Ateneo Lucano 10, Potenza 85100, Italy
3. The Pennsylvania State University, Department of Engineering Science and Mechanics, Nanoengineered Metamaterials Group, University Park, Pennsylvania 16802-6812, United States