A portable structure from which hunters and wildlife observers can command elevated views of wildlife habitat. In one embodiment, the present invention provides methods for detecting live microorganisms in a culture by capturing and culting the microorganisms on para-tropic-coated paramagnetic beads. A projector cooperates with a laser source, the digital micromirror device and the computer to enable a laser beam to be tailored to correspond to the irregular shape of the intended target area to avoid irradiating portions of the object other than the target area itself. Therefore, terminal capacity of the signal terminal can be reduced without causing ESD resistance to be reduced, in an ESD protection circuit with the signal terminal. The lid member is pivotal between an open position and a closed position. The discharge-sustaining gaseous mixture includes more than 80% xenon, by volume, at a low pressure.