The present invention provides a method and apparatus for a multilayer optical articles. In one embodiment, an aircraft can include a fuselage, at least one engine, and a fuel system configured to distribute fuel to at least one of the engine and an aerial refueling manifold. Further, each one of the first electrodes and a corresponding one of second electrodes defining an electric field in a direction parallel to a surface of the substrate. The plurality of buffer circuits are associated with respective groups of memory devices and are distributed across a surface of the memory module such that each module control signal arrives at the plurality of buffer circuits at different points in time. When the flow rate of the gas is below a predetermined threshold, power is supplied to the first sensor to detect gas flow.