An inexpensive and durable elastomeric pocket-portable hand-exerciser device for medical-therapeutic or to build-up an athlete’s hand-strength. In one aspect of the present invention, there is provided a system for creating and analyzing a model of a user’s semantic knowledge. An angle between a longitudinal axis of the rod and a longitudinal axis of the mounting neck that extends from the mounting foot to a rotation axis of the rotor handle is less than 90\xb0. As a result of thermal expansion in the valve mechanism, the height measurement exceeds the measurement for normal exhaust valve clearance when driving at high load and accompanying high heat development in the engine. The receptor molecule can be a peptide moiety specific for ligands involved in platelet function. A service policy enhances or restricts use of the service functionality by the subscriber.