Method for the effective transplantation of chondrocytescartilage to an articular joint surface defect is taught, as well as a description of certain instruments and kit for practicing the invention. When a video signal captured by a camera unit 10 is compressed and encoded and is recorded on a DV tape, a control unit 100 controls a compressiondecompression unit 40 and a tape deck unit 60 to compress and encode the video signal and record as DV data without using compressed data already recorded on the DV tape. The rib part includes a top portion which is located above the first and second slab parts and includes an undoped region formed from at least one of an intrinsic region and a low-concentration doping region which is doped at a dopant concentration 110 or less of a dopant concentration in at least one of the adjacent P-type region and the adjacent N-type region. The acquisition of the position may involve factors such as the trustworthiness of the transceivers in the network andor the positions of transceivers with which the first transceiver cannot directly communicate. Each storage unit couples to the assistant unit by one of the storage switches.