Systems and methods for detecting degradation of a sensor in a vacuum brake booster coupled to a manifold of an internal combustion engine include measuring an engine or vehicle operating parameter to detect operating or control conditions and detecting degradation of the sensor based on the engine or vehicle operating parameter. The Drop Down Menu Program provides for the elimination of some manual steps required by a user when employing a user input device for operations involving activation, selection, sorting and scrolling. The music renderer controller comprises a device integration application program interface for providing a standard interface for communicating with each of the device drivers. Also combinations andor chimaeric receptors can be applied. The second optical path length is different from the first optical path length. Such a composition is clear in appearance, and stable.