The present invention provides a vehicle roller assembly for an extensible shade or barrier net, and an auto locking end cap assembly for a vehicle roller assembly. The present invention also relates to composite catalyst supports comprising nanopowder and one or more inorganic nanowires for a membrane electrode assembly. The information is decrypted and the signatures of the information are validated using the first signing andor encrypting methodology. The MSBR is decreased and pacing is performed in accordance with the decreased MSBR when the MAPC is satisfied. A channel is in fluid communication with a second end of the air duct. Since the rangefinding routine is forcibly terminated if the voltage of the integrating capacitor in the rangefinding routine is outside of the preset range, malfunctions of a signal processing IC can be detected.