A treadmill having a belt assembly allows a user to walk or run in any arbitrary direction. A flattened flexible toroid bladder injected with a lubricant, and stretched over a frame with rotating members. Separate power-driven mechanisms concurrently rotate the toroid belt around the major and minor axis to allow omni-directional user movement.

 
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> 3D mouse and game controller based on spherical coordinates system and system for use

> Transmission of event markers to data stream recorder

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