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Glare from artificial lights is typically measured with luminance meters. From daylit windows, cameras are used to convert the pixels into luminance. Both of which are able to determine the luminance of objects within small solid angles. The glare of a scene i.e. visual field of view, is then calculated from the luminance data of that scene.
One nonnative species — guinea grass — can grow 6 inches in a day, according to Walker, the fire protection forester, who spoke about the problem during an April videoconference. When burned ...
These hot climates, compared to mild climates, require very small window openings to reduce the amount of heat infiltration. The fact that light shelves extend a fair distance into a room may result in interference with sprinkler systems. In Canada, they cannot exceed 1200 mm (4 ft.) in width if sprinklers are present or the design will require ...
Olsynium douglasii is a species of flowering plant in the iris family ().Common names include Douglas' olsynium, [2] Douglas' grasswidow, [3] grass-widow, blue-eyed grass, purple-eyed-grass, and satin flower, [4] It is the only species in the genus Olsynium in North America, the remaining 11 species being from South America.
Burning mirrors achieve a similar effect by using reflecting surfaces to focus the light. They were used in 18th-century chemical studies for burning materials in closed glass vessels where the products of combustion could be trapped for analysis. The burning glass was a useful contrivance in the days before electrical ignition was easily achieved.
It moved quickly, burning more than 15,000 acres in a single day fueled by hot, windy conditions. It has forced the evacuation of about 1,200 people and remains active.
Because the sun passes to the south of most observers in the northern hemisphere, north light is the light coming from the sky, rather than directly from the sun.This is the reason for its diffused nature, as well as why it casts softer shadows than direct sunlight and remains more consistent in colour than light from the east or west (which would be affected by sunrise and sunset respectively).
Ammophila breviligulata is perennial grass which produces an extensive rhizome system. The leaves have deeply furrowed upper surfaces and smooth undersides, and grow 1 to 3 feet (0.3 to 0.9 m) tall. The plant's inflorescence is a spike-like panicle that can reach 10 inches (25 cm) long; The spikelet is single-flowered, awnless. [4]