A switching power supply apparatus 10 controls a main switching element Q1 by a control circuit 12 so that a direct-current voltage obtained by rectifying an input alternating-current voltage is stabilized and outputted as a target direct current output. Each driving nip has a spring biased idler roller mounted on a cam follower and mated with a driven roller. Also, if the user has not acknowledged the receipt of a message, then the most efficient method of providing alert is used for all the subsequent messages received. In addition various therapeutic levels of ultrasound can be used to increase the speed at which fat metabolizes. upright position, the device is provided with a support member that is pivotally connected to the rear side of the chute. The method further includes determining an optimized cost of reading the second table.