A method is provided for controlling a powertrain of a vehicle comprising wheels, and an accelerator pedal actuated by a driver. The sheet conveying device includes a pair of drive pulleys, a pair of driven pulleys, a pair of chains each being passed over one drive pulley and one driven pulley, and a clamper affixed to the chains at opposite ends thereof. A method of conducting a wagering activity includes providing a player with a plurality of differing games of chance, at least some of which are mutually concurrently playable on a single screen display of a gaming device and enabling mutually concurrent play of the plurality of differing games of chance on the single screen display. In combination, the goals and meta-data define the structure of the data stack and the number of demand generation equations that are needed. The test signal and reference signal are optically combined into a combined signal.