Disclosed is a door jamb having a pair of tubular side jambs and a tubular head jamb, the side jambs and the head jamb each have an outer low maintenance element, an inner structural element, and an intermediate element for receiving a portion of each of the outer and inner elements to secure such outer and inner elements together in selected positions to provide a desired depth of the door jamb. The EBPs are paralogues of the P. The substrate may have one pattern on one surface of the substrate or may be printed as a double-sided substrate with at least one pattern on each side of the substrate. More specifically, the method uses common advanced graphics processor engines to accelerate the packet processing tasks.