Optical adhesives that also diffuse visible light include a blend of an adhesive matrix which is an optical adhesive and a block copolymer. The treadmill is adjustable between an operational position where the first and second sections are substantially horizontally aligned, and a folded position where the second section is pivoted onto said first section, such that an upper surface of the second section abuts an upper surface of the first section. A drainage lumen may extend longitudinally within the tubular conduit. The controller detects short-circuit conditions in the output and distinguishes between short-circuit fault conditions and discrete inputs generated by activation of the momentary switch based on measured characteristics of the detected short-circuit conditions. The alarm is coupled to receive power generated by the power generator. The transformation unit includes a plurality of inputs connected to the plurality of amplifier circuits and a plurality of outputs connected to the plurality of antennas.