A shock absorber for fifth wheel hitches for pickup trucks has a bushing embedded in memory polyurethane elastomer confined within a metal frame. The arpeggio pattern storing device stores at least one arpeggio pattern pair including a regular version pattern and an accentuated version pattern for automatic arpeggio performances. The edges with the ends of the device interconnects form the underside of the semiconductor stack block, external contact areas being arranged on the ends of the device interconnects, the external contact areas carrying external contacts. The STI structure comprises a second epitaxial layer on the substrate, and a second dielectric layer on the second epitaxial layer. If a network flow is identified with lesser certainty or is not associated with a previously identified network application, then a new network flow profile can be created from further analysis of network traffic information, network host information, and possibly additional network host information collected to enhance the analysis. A synchronous detection can cancel a problem of a misalignment in the main scanning direction due to a temperature variation.