A heat exchanger includes features for alleviating high pressure drops and controlling the expansion of fluid during freezing. The external control device comprises a user interface comprising a control element and a display screen configured for displaying a graphical representation of the operative element. When the vehicle begins to move or the gimbal is commanded to move, the last periodic reading of the resolvers is used to determine the amount that the gimbal has moved during the rest period. The invention provides several improved Turbo Codes Decoder methods and devices that provide a more suitable, practical and simpler method for implementation a Turbo Codes Decoder in ASIC or DSP codes. Axially, ions of at least one polarity are confined via DC potentials applied to the elements of the trap or electrodes at the ends of the trap whereas ions of the other polarity are axially confined by a combination of pseudopotentials andor DC potentials. The second dielectric layer overlaps a second one of the PMOS device and the NMOS device.