1. Department of Technical Science, “Nicolae Balcescu” Land Forces Academy, 3-5 Revolutiei Street, 550170 Sibiu, Romania
2. Nondestructive Testing Department, National Institute of R&D for Technical Physics, 47 D. Mangeron Blvd., 700050 Iasi, Romania
3. Department of Mechanical Engineering, Transilvania University of Brașov, 29 Eroilor Blvd, 500036 Brașov, Romania
4. Department of Impact and Waves in Solids, Institute of Thermomechanics, Dolejskova 5, 18200 Prague, Czech Republic
5. Nuclear NDT Research & Service, 104 Berceni Street, Sector 4, 041919 Bucharest, Romania
6. Department of Materials Sciences, Faculty of Mechanical Engineering, University of Žilina, 8215/1 Univerzitná, 01026 Žilina, Slovakia