1. Research Fellow, Hungarian Academy of Sciences, Research Group of Engineering Structures, Budapest Univ. of Technology and Economics, Dept. of Mechanics, Materials, and Structures, Müegyetem rkp. 1-3, Budapest, H-1521 Hungary.
2. Professor, Budapest Univ. of Technology and Economics, Dept. of Mechanics, Materials, and Structures, Müegyetem rkp. 1-3, Budapest, H-1521 Hungary.