Development of a tracking error prediction system for the CyberKnife Synchrony Respiratory Tracking System with use of support vector regression. - Kohei Okawa; Mitsuhiro Inoue; Takeji Sakae (Medical Biol. Eng. Comput., 2021)

Effects of a Teacher-type Robot Using a Perplexion Estimation Method on College Students. - Kohei Okawa; Felix Jimenez 001; Shuichi Akizuki; Tomohiro Yoshikawa (SCIS/ISIS, 2022)

Evaluation of Countermeasures Against Harmonic Disturbances Caused by Agricultural Heat Pumps. - Kyohei Kawamura; Kentaro Fukushima; Naotaka Okada; Kohei Okawa (ISGT EUROPE, 2023)

Effect of a Learning Support Model that Provides Autonomous Learning Support in a Teacher-Type Robot Based on the Learner's Perplexion State. - Kohei Okawa; Felix Jimenez 001; Shuichi Akizuki; Tomohiro Yoshikawa (TAAI (1), 2023)

Simulation Results of a Spatio-Temporal Perplexion Estimation Method Based on Learners' Facial Expression Changes. - Koki Sato; Kohei Okawa; Felix Jimenez 001; Shuichi Akizuki; Tomohiro Yoshikawa (SCIS/ISIS, 2024)

Proposal of Learning Support Model for Teacher-Type Robot Supporting Learning According to Learner's Perplexed Facial Expressions. - Kohei Okawa; Felix Jimenez 001; Shuichi Akizuki; Tomohiro Yoshikawa (J. Robotics Mechatronics, 2024)