When an external disturbance that causes the corrected amount of light reflected from a glass master disk 15 to surpass a threshold value T1 is applied to the control loop, not only the main control section 38 but also the sub-control section 37 controls the corrected amount 27. When a predetermined vehicle is currently running on a lane, a detection area, outside of the currently running lane, is designated to include a first area and an assumed ghost area therein. The device is then automatically paired to another device without any further user intervention to form a short distance wireless network in an embodiment of the present invention. % water and c) a cleaning effective amount of a surfactant wherein said surfactant comprises at least one anionic headgroup. The system is controlled in response to the detected temperature. The buffer gas flow divides with part going to suction and part to a drain along the oil flowing from the bearings.