---An inter-disciplinary team at the University of Southern California is pleased to announce Mercury Site, a WWW server that allows users to tele-operate a robot arm over the net. Users view the environment surrounding the arm via a sequence of live images taken by a CCD camera mounted on a commercial robot arm. The robot is positioned over a terrain filled with sand; a pneumatic system, also mounted on the robot, allows users to direct short bursts of compressed air into the sand at selected points. Thus users can "excavate" regions within the sand by positioning the arm, delivering a burst of air, and viewing the newly cleared region.
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