A method for manufacturing an electrical contact includes providing a series of electrical contacts joined on a carrier strip to a plating station followed by an induction heating station. This compound is prepared by a method in which a solution or suspension comprising salts or sols of the elements A, B and of the dopant is formed in a proportion such that the B atomic ratio is at least 2. Additional apparatus and methods are described. Since the signal is sampled near the center of the integration cycle and is not highly proximate to the time of the integrator reset, the latch signal has a window of uncertainty extending into the length of a data bit cell with little possibility of latching erroneous data. The further turbine may be located in the second propulsive unit and may be in fluid communication with the first turbine via an inter-turbine duct. The method includes the steps of detecting a distance between the obstacle and the vehicle, generating an action when the distance between the obstacle and the vehicle is less than a threshold, determining whether an override of the system has been initiated, and disabling the action if it is determined that the override has been initiated.