Abstract: Cooling systems with liquid for gas turbine engines use the relative motion of the engine stator with respect to the rotor for actuating the coolant pump. The cooling system is completely encapsulated within the engine rotor. The cooling system includes a tank containing the cooling liquid, a coolant pump coupled to the tank to extract the cooling liquid from the tank, a system of ducts and channels extending in the rotor shaft, and rotor disks and rotor blades, where the heat exchanger is positioned either in the compressor drum, or in the end of compressor section.

Abstract: A high definition television system. Each pixel of the resulting television picture is represented by three equations which describe that pixel state over a predetermined time. Only coefficients of those equations need to be transmitted. Only those pixels which have an equation which completely changes need to be transmitted. Hence, at any given time, only a very small percentage of information needs to be transmitted: the rest of it follows the pre-sent coefficients.