A brokerage system that identifies a service provider satisfying at least some attributes in a set of patient defined attributes for providing a service is accessed. A determiner determines a timing of the driving of the starter based on the future trajectory of the drop of the rotational speed of the internal combustion engine. A power supply voltage is supplied to a digital circuit 19, an MPXPLL 17, and pilot signal detection circuit 18 of the stereo demodulation circuit 16 from a digital-use power supply that is separate from the analog-use power supply. The CQI statistical processing section performs statistical processing of reported CQIs corresponding to test data transmitted prior to an accuracy measurement test, and reports the most frequently reported CQI to the scheme control section as a fixed CQI. The temperature sensor output is used to control the write pulses from the disk drive’s write head so the magnetic write field is synchronized with the location of the magnetic data islands.