1. Charles University
2. Faculty of Mathematics and Physics
3. Department of Surface and Plasma Science
4. Prague
5. Czech Republic
6. Instytut Fizyki Doswiadczalnej
7. Universytet Wroclawski
8. Wroclaw
9. Poland
10. Department of Computer Science
11. The University of Tokyo
12. Tokyo 113-0033
13. Japan
14. Department of Electronics Engineering and Computer Science
15. Fukuoka University
16. Fukuoka 814-0180