Affiliation: | (1) Kobe Gakuin University, 518, Arise, Ikawadani-cho, Nishi, Kobe 651-2180, Japan;(2) Naruto University of Education, 748 Nakajima, Takashima, Naruto-cho, Naruto, Tokushima 772-8502, Japan;(3) National Institute of Information and Communications Technology, 3-5 Hikaridai, Seika, Soraku, Kyoto 619-0289, Japan |