Intelligent Edutab Box: Supporting Real-Time Face-to-Face Collaborative Learning. - Yuto Omae; Kazutaka Mizukoshi; Tatsuro Furuya; Takayuki Oshima; Norihisa Sakakibara; Yoshiaki Mizuochi; Kazuhiro Yatsushiro; Masaya Matsushita; Hirotaka Takahashi (J. Adv. Comput. Intell. Intell. Informatics, 2021)