A display device with reduced power consumption has pixels coupled with data lines and arranged in a matrix, a signal controller processing input image signals and outputting output image signals, and a data driver applying data voltages, corresponding to output image signals, to the data lines. Matched trades are novated by executing a trade for the volume and price of the matched trade between a first counterparty and the settlement system and an equal but opposite trade between the settlement system and the second counterparty to the trade. The first network node then establishes communication with the second network node by way of the network address translation device, including sending a plurality of first dummy packets from the first network node directly to the second network node. In this invention the two surfaces of the hot board strand are abruptly quenched and moistened with a water spray in a first cooling section which contains an evaporation zone and which is variable in length and adaptable to the thickness of the strand. A light transmitter and an imaging device are optically coupled to the molded waveguide substrate, and a processing device is coupled to the imaging device. An authorisation of payment is carried out and the selected taxi allocated to the customer if the authorisation is successful.