An assembly and method for recording andor reading high-density data includes a phase change media, an antenna placed adjacent the phase change media, and a source of electromagnetic radiation. The facilities management process can include an application service for receiving the location of the tag device from the transceiver, at least one geographical work zone, and a tracking module configured for recording a time period the tag device is within each geographical work zone. The Miniature Projection Head of the present invention projects an image of the veins of a patient, which aids the practitioner in pinpointing a vein for an intravenous drip, blood test, and the like. A second pump draws the gas in the reaction chamber through a calcium hydroxide filter and delivers the nitric oxide through an orifice, or aperture, that controls the flow of nitric oxide delivered. Calculations of the density of states show that a doped coating which reduces the density of states near the band edge or increases the density of states within the band gap of the pigment particles increases the photostability of the doped pigment.