Logic circuits and carry-lookahead circuits capable of performing high speed operations with simplified designs are described. The system comprises a bone plate having openings arranged in a first pattern for receiving fastening elements, as well as a receiving surface having a plurality of openings for temporarily receiving the fastening elements. The cutting tolerances of the patterned edges make it necessary to fix the punch with respect to the die so that there is no misalignment of the punch and die between cutting operations. A gate conductor is located on the at least one dielectric material layer between the source-side conductive material portion and the drain-side conductive material portion. In another aspect, the seat has a frame and a flexible membrane secured to the frame, with the membrane and frame defining an upper body-supporting surface comprising substantially concave side portions and a substantially convex front portion. The agent may be a botanical active or a decoupling polymer.