Each wireless communication apparatus forming a wireless network has an operation mode in which a wireless communication apparatus becomes a control station with priority, an operation mode in which a wireless communication apparatus may operate as a control station, and an operation mode in which a wireless communication apparatus does not become a control station. The second metal also may have higher oxygen affinity than the first metal. Different versions of the test can be generated by changing the combination of question variants used. The electron emitting device is disposed on the supporting plate and emits electrons along the center axis of the cylindric carrier. In the locking position the locking pin extends below the gearbox housing to engage the rotary member mounted on the shaft, thereby locking the shaft. The kernel mode control circuit will reset the processor should a security violation occur, such as attempting to access the kernel RAM while in the user mode.