A heat spreader comprising a sheet of transparent diamond with an aperture therein that accommodates a solid-immersion lens. Optionally, users are provided with \u201cno-touch\u201d control of items like doors or taps, and with management of supplies, event logging, instrument control, communications and the like through a network of computer peripherals and a control unit. To retain charge stored on the floating gate, the tunnel oxide is relatively thick. An arbor bore and a counterbore are concentrically disposed and coaxially aligned with the center axis. It is also possible for two supporting network elements to allocate the same TLLI to two different mobile stations. The ear protectors are therefore rotatable into a parking position within the helmet.