| http://www.w3.org/ns/prov#value | - A method, for sensing the position of a body part, comprising the steps of:sensing the direction of tilt of the body part by means of a sensor mounted on the body part, said sensor including a plurality of ON/OFF switches, each ON/OFF switch having either on an or OFF state; sampling said sensor to determine the ON/OFF states of said ON/OFF switches; counting said ON/OFF states of said ON/OFF swit
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