An electronic control unit installed on a high temperature heat source or in its vicinity exhibits an improved heat dissipation ability within its installation environment. The viewer or the viewer’s equipment, on the basis of the viewer’s preferences, causes the event to be scheduled at the appropriate time. % or greater of the amount of Ru andor Ir to be supported is adjusted to fall within a depth of 150 \u03bcm from the surface layer of a substrate; and the catalyst is prepared by immersing the substrate in a metal colloid solution of Ru andor Ir to be supported or an aqueous solution containing at least one compound selected from compounds of Ru andor Ir to be supported. Feedback from one or more of – is used to modify the applied voltage signals in control of the SOP. An air gap is located to link with the second coil to create an inductor in that coil by flux in the second coil, and a capacitor is connected across the second coil to tune it to the fundamental frequency of the alternating current and substantially reduce harmonics in that current. The method comprises the computing device performing the following programmed steps: obtaining a plurality of data elements; performing a first one way function on an internal value P and the plurality of data elements to update the value P; and performing a second one way function on the value P to obtain the unpredictable number.