Disclosed is a method for encoding a decoding a video signal. A method typically includes determining whether a data object managed by an on demand service is designated as able to be accessed by a user at a mobile device and storing locally at a mobile device a plurality of most recently used items viewed for a data object designated as able to be accessed by a user at a mobile device. When a previously loaded roll has been unwound a spent core station disposes of the remaining core. However, if more than one authorized tag is present in the feeding time set for one animal, the drawer closes. , chemical, light, temperature, etc.