A unified buffer, comprising a shifting queue, receives instructions to be tracked by receiving units in a computer architecture. The electrodes thus defined have minimum lateral dimensions ranging from approximately 500 to 4000 Angstroms. In a system of the present invention, a master controller updates a full-closed position accelerator opening closed when an accelerator open flag Fopen is set ON and when a current accelerator opening n is less than a learning permission accelerator opening lok and monotonously decreases to be converged.