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Online chat tools enable people in different countries or places to communicate directly on the Internet. Despite the high quality of computer images and sounds, and the countless interactive game programs available nowadays, online communication still lacks the aspect of physical touch that is essential in expressing feelings. In view of this limitation, Prof. Liu Yunhui of the Department of Mechanical and Automation Engineering of The Chinese University of Hong Kong (CUHK), and his research team have invented a web robotic hand-in-hand system. By imitating the movement of human hands at the other end of the Internet, the robotic hand allows users to experience a feeling like that of holding their friend’s hand via the web.

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