An amplitude suppressing apparatus includes a differential circuit that calculates a differential value of amplitude of an input signal at a point when the amplitude reaches a predetermined threshold. The lower portion includes a thermal management feature having at least one passage provided therein. A polymer layer is selectively formed on the first layer by subjecting an organic monomer to living radical polymerization using the polymerization initiator. The solution has a viscosity of 3300 cp or less at 20\xb0 C. Interoperability can also be provided between functions on a user operation vehicle based on a pre-determined set of rules.