A method of controlling a power generating unit or other process equipment with a slow reaction time includes creating a feedforward control signal to selectively include a fast response rate component or a slow response rate component based on the average rate at which a load demand set point signal has changed during a particular previous period of time. By applying an RD protocol to a communication system that conducts space-division multiple access, spatially multiplexed frames in a TXOP are made more efficient. The new advertising space is formed by a piece that is substantially triangular, allowing for two surfaces that advertising media can be applied too, being that this device is placed in proximity to the cart handle, in such a matter that both surfaces with media stay facing the cart user or circulating public of the store. The low-discrepancy sequence generator is configured to generate elements of at least one low-discrepancy sequence.