The vibrating device comprises, a vibrating table 3 vibrating upwards and downwards with respect to a vibrating platform 2, and a lower side installation section 4 provided on the vibrating table 3 and having a hemispherical recess surface for supporting the lower end section of a hydraulic shock absorber 6. A statistical model of activity patterns is generated for each user and user activity source based on various parameters. upon receiving the register request, determining one of the SEs which will provide signaling service for the TE in accordance with association information recorded in the NE. The viewer alert comprises displayed marks superimposed over the broadcast of the television program. The current of the ac electricity is adjusted to be in phase with the utility grid voltage, wherein the ac electricity is maintained substantially at unity power factor. Therefore, a program information registration unit to register a plurality of items of recording reservation information as groups and a reserved program recording control unit to record the reserved programs onto the recording medium and leave at least the latest program among the programs recorded on the recording medium to delete the others on the basis of the reservation information.