1. Department of Electrical Power Engineering, TU of Košice, Mäsiarska 74, 041 20 Košice, Slovakia
2. Department of Aerodynamics and Simulations, TU of Košice, Rampová 7, 041 21 Košice, Slovakia
3. Institute of Geotechnic, SAS, Watsonova 45, 043 53 Košice, Slovakia
4. Department of Material Science, TU of Košice, Park Komenského 11, 040 01 Košice, Slovakia
5. Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia