Affiliation: | 1.College of Science and Technology, Nihon University, Narashinodai 7-24-1, Funabashi, Chiba, 274-8501, Japan ;2.Research and Support Center on Higher Education for the Hearing and Visually Impaired, National University Corporation Tsukuba University of Technology, Kasuga 4-12-7, Tsukuba, Ibaraki, 305-8521, Japan ;3.College of Science and Technology, Nihon University, 1-8-14 Kanda-Surugadai, Tokyo, 101-8308, Japan ; |