Acoustic energy is used to control motion in a fluid. The distributed sensor array may comprise optical transmitters and optical receivers configured such that they may be individually addressed and activated. Furthermore, a power controller can significantly reduce the power demand. At least one data request concerning the highly-available, volatile, solid state cache memory system is redirected to the non-volatile, solid-state, cache memory system. Each existing blade is inserted inside the brackets along the back surface of the decorative blade. At least one clamping diode is connected to one or many NPP converter cells to provide a neutral-point-pilot-clamped converter structure.