A method for control communication between coupled train components, wherein mechanical and electrical couplings as well as devices for exchanging data are present. A bridge, comprising memory material, such as a phase change material, switchable between electrical property states by the application of energy, is positioned across the surface segment and in contact with the electrodes to define an inter-electrode path defined at least in part by the length of the surface segment. A disclosed plasma characterizing device includes a means for directing THz radiation into a plasma; and a detector adapted to detect an emission emitted by the plasma due to interaction of the THz radiation with the plasma to characterize the plasma. The celebration pay is delivered to the gaming machines used by the celebrating players. The analyzing apparatus 100 determines reliability by using survey position information included in the survey results and carries out a predetermined analysis by using a survey result of high reliability. The towing bracket has a hanging member that attaches to the hub nut of the rear wheel of the bicycle, and may have a disk with an attached tab that mates with a slot in the rear frame, with the disk having a number of holes that mate with raised nubs in the hanging member, to prevent rotation of the hanging member about the nut.