A triple-slope MOS active pixel sensor disposed on a semiconductor substrate comprises first and second capacitive storage elements each having a first terminal connected to a fixed potential and a second terminal. A mobile station transmits a handoff request message including a measured signal power value and information about a traveling direction thereof, when signal power from an adjacent base station is higher than a threshold. The outer diameter of the icicle-shaped body member at its top end is less than the width of the open bottom end of the lamp housing to provide a light ray passage open space therebetween. The extension member includes an adaptive releasable locking member having an internally threaded, cuplike end portion dimensioned for releasable threading engagement with the dental tip. If the version identifier of the data object stored in the second application system indicates that a more recent version of the data object exists, the more recent version of the data object is requested from a central system that maintains the data objects and the second system is updated.