A brake backing plate is provided in which a non-compressible core material is sandwiched between two sheet metal stampings to make a lightweight, composite brake backing plate. The user enters a feature code from hisher IP terminal, which feature code is received by a remote server having access to an IP user directory, hereinafter, for example, an active user registry database, and forwards necessary information for invoking the feature in a determined manner to a Service Control Point. Management information on programs chains, which are combinations of programs to be reproduced one after another, has been written in a video title set PGC table. Light passing through the gratings may similarly be collected by the measuring system, which processes the collected light. Useful curing agents are for example sulfur, sulfurous compounds, metal oxides, maleimides, phenol resins, siloxanes or peroxides.