"Yoichi Nakaoka,SHINJI TANAKA,HIDETOMO TAKAHASHI,鄭 在鉉","Usability evaluation using facial expression / Report 1: Development of prototype system for analysing facial expression","The 18th Annual Conference  of the Virtual Reality Society of Japan","第18回日本バーチャルリアリティ学会大会論文集","日本バーチャルリアリティ学会",,,"p. 170-173",2013,Sept.