A proton conductive membrane according to the invention includes layered clay mineral powder which is a cation exchanger or an anion exchanger, and a crosslinking structure including an \u2014O\u2014SO2\u2014O\u2014 group which crosslinks particles of the layered clay mineral powder. A power management module receives inputs from other modules and determines when the network interface module is to be put in a doze state for a predetermined number of beacon intervals to conserve power consumption in the network interface module. Based on the information acquired from the error information recording area, the management apparatus determines whether a predetermined type of error has occurred. The pharmaceutical composition can be formulated indistinctively from the premixture both as grooved tablets and powder for suspension. The devices exceeding the maximum number of devices communicating with a master device are switched to a park mode and, continually in keeping with a predefined strategy, parked devices are switched to active while active devices are switched to parked. Also disclosed is a process of fabricating a circuit assembly which includes building patterned circuit layers upon a substrate that has vias provided by the aformentioned process.