Pyrocarbon components have been found to create richer, clearer sound when employed as bridges, saddles, nuts, frets, tuning heads, pegs and other components which contact the strings in guitars, violins and like stringed musical instruments. The IPv6 protocol is used over the fixed network resources to support the MANET-level communication, and mobility-supporting features of the IPv6 protocol are exploited without modifying the IPv6 protocol. The one or more links in the result set associated with items of premium video content are identified and the one or more links in the result set associated with items of premium video content are filtered on the basis of information associated with the user from which the query was received. The silicon PiN diode and Schottky barrier diode are separate chips.