An arrangement for controlling a variator in a continuously variable transmission such as a vehicle transmission is described. In a mobile communication system having a first mobile station on a calling side, a second MS on a called side, and a base station and an MSC that enable communication between the first and second MSs, the MSC has a storage component that stores picture information of each MS. A sensor is operable to measure a parameter indicative of hop and output a hop signal indicative of a magnitude of machine hop, based on the measurement. The wire bolt can be attached to a concrete building structure during initial construction of a structure or retrofit into existing structures. A direction of the magnetic field generated by one of the coils is opposite to a direction of the magnetic field generated by the other of the coils.