This invention provides compositions of the formula Cu3Ta3MO12 wherein M is Al, Ga, Fe, Cr, Sc or mixtures thereof. An oscillator generates a triangular signal, received by a limit signal generator to produce a limit signal accordingly. Yet other aspects comprise a load-sensing hydraulic circuit comprising at least two loads and a control system for controlling at least one of the loads, that prevents unwanted pressure transients in the circuit. Additionally, communications pertaining to a terminal are routed through the access point to a communication device. The flexible cable mechanically and electrically connects the barrel connector to the terminal lug connector and permits angular movement between the barrel connector and the terminal lug connector. In an embodiment, it is proposed to allow the corresponding lines to open out in the stack of a power plant; the stack draft effect assists the flow even further.