1. Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan
2. Laboratory of Advanced Science and Technology for Industry, University of Hyogo, 3-1-2 Kouto, Ako, Hyogo 678-1205, Japan
3. Department of Electronics and Computer Science, Graduate School of Engineering, University of Hyogo. Shosha, Himeji, Hyogo 671-2280, Japan