Electronic devices prepared from nanoscale powders are described. The take-up fastener in general includes a take-up plate, or washer, fastened to a portion of the upper level and a take-up screw fit through the take-up plate and fastened to the adjacent level below. The system features a variable polarization a polarizing relay assembly arranged to selectively permit the scattered light having a selected polarization orientation to pass along a detector optical axis to a light detection unit in the detection subsystem. The indicator unit is operable to emit a signal and the detecting unit is operable to detect and identify signals of the type emitted by the indicator unit of another monitoring device and output an information signal indicative thereof. 0 at % of S are contained and a remaining portion has a component composition consisting of Cu and unavoidable impurities. Further, the relative position determinations can enable a user to perform certain functions with respect to another device based at least in part upon the position andor identity of that device.