A security locking system for trailers that features an interior locking bar that is controlled from the outside. Each stage includes a detector, a regenerator, and a subtractor. Further provided are methods of data mining, comprising: providing a web-based application for sharing posted application information accessible by a plurality users using client-server interfaces; monitoring use by the plurality of users of posted data content; and identifying a subset of users thereby. The conductor structure may provide a diagnostic pathway. The cover member has a first surface communicating with the interior space of the casing and a second surface exposed to the exterior of the vacuum pump. A catalyst possessing durability and excelling in the ability to adsorb hydrocarbon, the ability to purify, and the three-way performance is provided.