A dragline excavating machine includes a gearless direct drive AC drive motor for driving each of the hoist and the drag drums in the system. The excitation current that limits the power of the generator can be varied in the excitation circuit of the generator in accordance with at least one vehicle-specific operational parameter andor the actual charge of the capacitor. In other embodiments, the method may include calculating the frequency distribution of the variation of the current detected in a predetermined period. Popularity for the given media asset in the list is retrieved after selecting the given media asset for deletion. This dissociation can destroy the hazardous or toxic constituency of the waste.