Disclosed is a series of stacked intermodal containers, being pulled by a locomotive of a train, with aerodynamic drag reducing devices. The process involves a technique for evaporating an evaporation source containing multiple different oxide compounds, at least one of the oxide compounds having a vapor pressure that is higher than the remaining oxide compounds, to deposit a coating of the multiple oxide compounds. A heuristic engine 175 receives the file and compares the raw data with predetermined state data and outputs a state based on a comparison of the raw data and the predetermined state data. In a first position, the slots in the sliding sheet align with the slots in the top sheet.