The invention relates to a method for structuring an oxide layer applied to a substrate material. A software process tracks its own progress. In one exemplary embodiment, the apparatus comprises a kiosk adapted for use near a security checkpoint, wherein passengers or patrons can efficiently deposit their items for shipment to their home, travel destination, or third party. In multi-channel rematrixing technique, the audio encoder suppresses certain coefficients of a difference channel by scaling according to a scale factor, which is based on current average levels of perceptual quality, current rate control buffer fullness, coding mode, and the amount of channel separation in the source. The body surface defines a plurality of apertures extending from an exterior space to an interior space, and a first portion of a first wire is in the interior space while a second portion of the first wire is in the exterior space.