A low-profile multilayer cushion assembly which can be used to support the human body under various conditions. The center for the center infix run is determined, and the characters of each character type are encoded into binary encoded substrings. The device includes a circuit card assembly, which is a multi-layered printed wiring board with pass-through electrical connections and an embedded ground plane electrically coupled to the housing to shield the electronics assembly from electromagnetic interference and to provide environmental protection to the electronics assembly. Context circuitry tracks the shift amount used for normalization.