A markerless method is described for tracking the motion of subjects in a three dimensional environment using a model based on linked kinematic chains. A thermally curable glue is deposited on the lens while it is still in the mold. The node device receiving the program information broadcasted from a broadcasting station creates the identification information corresponding to the program code intrinsic to the program information stored, and sends a message to register the node device storing the program information, based on the identification information, to the node device managing that identification information.