1. Research Engineer, Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejškova 1402/5, 182 00 Prague 8, Czech Republic.
2. Director, Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejškova 1402/5, 182 00 Prague 8, Czech Republic (corresponding author).
3. Assistant Professor, Dept. of Mechanical Engineering, Northern Arizona Univ., P.O. Box 15600, Flagstaff, AZ 86011.
4. Professor, Dept. of Civil and Environmental Engineering, Univ. of California at Davis, Davis, CA 95616; National Technical Univ. of Athens, Faculty of Applied Mathematical and Physical Science, 157 80 Zographou, Greece.