In an outbound transmission, an address of a first subscriber unit assigned to transmit in a first inbound slot is identified. MEANS FOR SOLVING PROBLEMS A perpendicular magnetic recording layer 22 has a plurality of tracks 102 which define recording regions extending in a scanning direction of a magnetic head and which are arranged in parallel in a direction intersecting with the scanning direction. The article may be an implant for surgical or dental use. The control part and the nozzle needle are embodied integrally. Obtaining search history information associated with members in the relationship list based on the relationship list and ranking the search results based on the search history information.