[1] Fdn Res & Technol Hellas, Inst Elect Struct & Laser, Iraklion 71110, Crete, Greece
[2] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA
[3] Univ Kentucky, Ctr Computat Sci, Lexington, KY 40506 USA
[4] NASA, Ames Res Ctr, CSC, Moffett Field, CA 94035 USA
[5] Russian Acad Sci, Inst Biochem Phys, Moscow 117977, Russia