A communication apparatus determines a hibernation period on the basis of the amount of an offset in beacon period start timing among multiple beacon groups. In response to determining that the reward has been earned, it is determined whether this is the employee’s initial earned reward. In one aspect, the media file is available from multiple locations on the network and in different media formats. 01 to 10 parts by weight of at least one compound selected from the group consisting of benzotriazole-, triazine- and hydroxylamine-based compounds; the molded article thereof; and the method for controlling biodegradation rate using the same composition. The control signal and the sound signal are transferred in digital format between the first unit and the second unit via the bus. The showerhead assembly has a blocking assembly disposed within the showerhead assembly for restricting the flow of process fluid within the showerhead assembly.