1. Brain Embodiment Lab, School of Systems Engineering, University of Reading, Reading RG6 6AY, U.K.
2. Graduate School of Human Informatics, Tohoku Gakuin University, Sendai 981-3193, Japan
3. Marine Biosystems Research Center, University of Chiba, Choshi, Chiba 288-0014, Japan
4. Department of Subtropical Agro-Environmental Sciences, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan