Apparatus and associated systems and methods may relate to a process for supplying unidirectional current to a load, controlling a reverse electromotive force, capturing inductive energy from the load, and supplying the captured inductive energy to the load. In the method, whenever each frame of a video sequence is input, a difference between the input frame and a previous frame is detected, and the input frame is set as a key frame if the difference exceeds a predetermined first threshold value. The MSP contracts with and manages maintenance, repair and overhaul organizations who perform the maintenance on the customers’ aircraft at line and base stations. A Short Interframe Space value may be determined for each access point in the first list or generally SIFT representing the first list as a whole.