An intelligent LED drive power has an EMI filter, two ACDC constant current units, a microcontroller, a switch unit, two state detect circuits and an assistant power. A video-data compression rate N used by a 1:N video-data compression encoder 3 and a 1:N video-data compression decoder 6 is changed depending upon a picture quality set by a device 5 for setting a picture quality that a user desires. The polymer contains a hexafluoroalcohol monomer unit comprising one of the following two structures:wherein n is an integer. The motion of the swing arm may be arrested with a swing motion arrest substantially collocated with a swing axis pivot point. The volumes may be applied to a storage workload in the order of the allocation list and the gap values and list are updated. A central data management unit, on its part, is connected to the communications bus and is designed in such a way that it makes available to the control units, respectively, specific data from a permanent memory.