A control mechanism of a full-automatic multi-folded umbrella includes a bolt, a nut and a push rod disposed on the bolt and cooperating with the bolt. The apparatus includes a computation device for performing a trellis computation for decoding a data train completing the convolution-encoding process. The fragments may be cycle-aligned such that a start of a payload of each of the fragments substantially coincides with a start of one of the cycles. The prescription plastic lens includes a prescription lens body generally defined by a peripheral edge having a bevel extending away from the edge to a vertex. The apparatus includes hard disk drives and DVD drives utilized to store HDTV signals and hardware and software to provide constant data feed of HDTV signals into a closed circuit where those signals may be utilized for demonstration purposes of televisions available in a retail store or may be utilized to service HDTV monitors.