A display apparatus includes a control circuit for outputting a timing signal for determining a predetermined time period and a clock signal counted to determine the length of a modulation signal. The pressure andor volume flow of the injected process gas is dynamically modulated within a time span of 40 s. The synthetic context-based object is associated with at least one specific data store that contains data that is associated with data in the non-contextual data object and in the context object. The method also includes identifying a neighborhood that includes a first customer and a number of the other customers. The socket 25 includes a primary circuit including a primary coil 31 that upon being energized causes the secondary coil 23 to produce an AC current, subsequently converted into a DC current for the purposes of charging the battery 21.