A method, consistent with certain implementations involves at a television remote controller housing that provides a user interface that provides access to controls for television functions and encloses a television remote controller circuit: receiving a 3D shutter glasses synchronization signal; and re-transmitting the shutter glasses synchronization signal. The facet joint includes a superior articular face and an inferior articular face. The darkening control signal activates the adjustable sun visor in response to the degree of sunlight detected. The communication systems, navigation systems, transponder systems, and other avionics systems may be communicatively connected to the aircraft avionics management and control system via different types of communication links having different communications protocols andor different standards. CBH2 that have improved properties compared to the wild type enzyme and methods of using the variants in the hydrolysis of substrates comprising cellulose.