A method and system for minimizing bus traffic in a video decoder is disclosed. In particular, the invention involves food additives or supplements, a composition containing these and the use thereof, in particular for revitalizing a subject’s metabolism, in particular, that of human beings. Further, if the temperature of the electric power accumulator is lower than the predetermined temperature, the engine is driven to carry out a warm-up operation and a motor generator is driven to charging and discharge the electric power accumulator to thereby heat the electric power accumulator. This arrangement eliminates the need for bypass air ducting between the return air duct and the bypass air filter. Thus, a method for leak-tightness and operational testing is provided, which is performed, without the dismantling of components, by the devices already present in the vehicle. An operation terminal includes a touch screen display and a network communication section which communicates with an MFP, and is capable of performing an operation on the MFP concerning document printing, and setting an insert to a printed matter to be printed by the MFP.