The invention is a Group IVB transition metal compound which may be employed in the polymerization of olefins to produce high molecular weight polymers. At least a part of the first radio system can be shut down to reduce the power consumed by the device. The reproducing apparatus generates key information based at least on the contents reproduction permission information and decrypts the encrypted contents that were read. These command, address or write data signals are latched into input latches in the memory device by the quadrature strobe signal coupled from the memory controller to the memory device. The per-VM swap space is used solely by the single, corresponding VM, such that only that particular VM’s memory is allowed to be swapped out to the swap file. The sensor is mounted at a distance from the magnet wheel and at least one line is connected to transmit pulses between the sensor and the magnet wheel.