1. National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki305-8569, Japan
2. Slovak Academy of Sciences, Institute of Geotechnics, Watsonova 45, Košice04001, Slovakia
3. Department of Materials and Environmental Engineering, National Institute of Technology, Sendai College, 48 Nodayama, Medeshima-Shiote, Natori981-1239, Japan
4. Faculty of Mining, Ecology, Process Control and Geotechnologies, Technical University of Košice, Letná 9, Košice04200, Slovakia