A power control method performed by a mobile communication terminal comprises determining a received signal code power of common pilot channel signals received from a base station on a common pilot channel in at least one time interval. The appliance prioritizes the production of electrical energy using ambient wind and solar energy sources, while at the same time, providing for the substitution of fossil fuels on an expanded or as-needed basis. Provided on a font side of the tray are a transverse guide groove perpendicular to a disk conveyance track, a transverse guide wall defining the transverse guide groove, a corner wall connected to the cam wall, and a corner escape-preventing wall connected to the gear escape-preventing wall. In an exemplary embodiment, the reflector is configured as a photonic crystal.