A studded membrane is proposed for the protection of buildings with a drainage and slip surface formed on the reverse side thereof. By rotary manipulation of the operating element, an attractive and repulsive force is generated between the ring-shaped magnetic and the magnetic disposed on the base, so that an operation contact click-feeling is obtained, and therefore the rotary click-feeling and signal output can be synchronized easily, and deterioration of rotary click-feeling is very rare. When the interrogation signal is applied to a sensor terminal in a first mode, a first output is obtained. The method of the present invention may also be used to repair integrally bladed rotors. All of a portion of the semiconductive material layer and all of the insulative material layer directly beneath the portion are removed thereby creating a void in the semiconductive material layer and the insulative material layer. If the vehicle’s average speed exceeds an acceptable speed for that portion of road, the registered user is notified, thereby deterring future speeding.