Representing a transparent object as a summation of substantially zero step functions of a visibility curve for the object. The base station apparatus includes a scheduler configured to assign a mobile station to a first stream over a first frequency band or a second stream over a second frequency band included in the first frequency band, in accordance with the level of interference of the mobile station with a neighbor cell. , thereby enabling the multilayer film to be separated from the substrate. This combination seemingly creates a new portable media player with a longer battery life and the ability to wirelessly control devices. A support member may be pivotally coupled to the footboard for movement between a stowed position and an extended position in which the support member may support the platform. Such motors may also comprise electromagnetically actuated mechanical brakes.