A system and method are provided for obtaining information from a data management system. The method and apparatus incorporates a linear motor and controllable mass for generating recoil. The in-vehicle unit, only in a case where it is determined that the portable device position included in the response signal is within a predetermined area around the vehicle position, performs control of a lockunlock state of a vehicle door in accordance with the identification result of the ID code included in the response signal. Each of the number of collaborator devices is capable of establishing a mobile-to-mobile communications link with the mobile device. In preferred embodiments, both the fastener and the bone plate are formed of biodegradable material.