Affiliation: | 1.Graduate School of Information Sciences, Tohoku University, 6–3 Aramaki-Aza-Aoba, Aoba, Sendai, 980-8578, Japan ;2.National Institute of Advanced Industrial Science and Technology, 2–3–26, Aomi, Koto-ku, Tokyo, 135-0064, Japan ;3.Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916–5 Takayama, Ikoma, Nara, 630–0192, Japan ;4.Cyberscience Center, Tohoku University, 6–3 Aramaki-Aza-Aoba, Aoba, Sendai, 980-8578, Japan ; |