A sequential lateral solidification mask having a first region with a plurality of first stripes that are separated by a plurality of first slits. The light guide plate includes a light emitting surface, a bottom surface opposite to the light emitting surface, and a plurality of reflective structures at the bottom surface. The method includes: obtaining a signal signature of a wireless signal received at a receiver of a mobile communication device, the signal signature being a fast fourier transform representation of the wireless signal; and determining that the wireless signal represents interference caused by the cable network by comparing the signal signature to a cable network signal signature. The particles are contacted with one or more primary obstructing members while in the fluidized bed. The LCU automatically selects the direct or repeater transmission path depending upon whether or not it receives polling message responses from its associated OCUs. The spoke is positioned within the opening and is connected to the connecting element with the overlie engagement to support spoke tensile load.