A strand based on glass fibres with a \u03c4\u03bc2ratio greater than 9, where \u03c4 is the yardage in tex and \u03bc is the filament diameter in \u03bcm. In an embodiment, a multilumen unilimb breathing circuit has first and second conduits, wherein when the proximal ends of said first and second conduits are each connected to an inlet and outlet fitting, respectively, movement of the distal end of the first conduit causes a corresponding movement of the distal end of the second conduit. This system includes a circuit-switched private branch exchange interface, a packet-switched private branch exchange interface, and a processor. The electronic device may further include a first electrode adjacent to the layer of P-type material of the charge carrier separation layer opposite to the N-type material.