An apparatus and method for operating a fuel injector of an internal combustion engine is disclosed. The Pound-Drever-Hall frequency-locking technique is employed to keep pump laser frequency in resonance with one of the Brillouin fiber ring cavity modes. Each cleat is associated with a roller-shaped member for maneuvering the flap. A determination is made as to whether each of the transmitted data blocks was received successfully or needs to be retransmitted because the data block was not received successfully. The soluble Fc receptors of the invention are specific for immunoglobulin G of under-class 1 andor 3. For operation at capacitor altitude Z above the surface of the earth, the overall size of the capacitor, L, can be specified for use in the pulse spectrum below 500 khz.