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In a technique known as blue field entoptoscopy, the effect is used to estimate the blood flow in the retinal capillaries.The patient is alternatingly shown blue light and a computer generated picture of moving dots; by adjusting the speed and density of these dots, the patient tries to match the computer generated picture to the perceived entoptic dots.
The order of operations, that is, the order in which the operations in an expression are usually performed, results from a convention adopted throughout mathematics, science, technology and many computer programming languages.
Twilight phenomenon (seen from the Louisiana-24 Long Range Tracking Telescope site in northern Santa Barbara county) lights up the night sky over Vandenberg Air Force Base following the launch of a Minuteman III missile September 19, 2002 (Official USAF Photo by Dennis Fisher, 30th Communications Squadron) Twilight phenomenon caused by freezing unspent fuel from a Minotaur I launch at ...
Jane Elliott (née Jennison; [2] [3] born November 30, 1933) is an American diversity educator.As a schoolteacher, she became known for her "Blue eyes/Brown eyes" exercise, which she first conducted with her third-grade class [a] on April 5, 1968, the day after the assassination of Martin Luther King Jr.
A rocket is destroyed during flight to prevent it from leaving the launch corridor or continue an otherwise errant flight. The resulting destruction is required to scatter rocket parts over a small area, ensuring the majority of the parts stay within the launch corridor and are able to cause as little damage or injuries as possible.
NASAcast is the official audio and video podcast of the NASA website. Created in late 2005, the podcast service contains the latest audio and video features from the NASA web site, including NASA TV's This Week at NASA and educational materials produced by NASA. Additional NASA podcasts, such as Science@NASA, are also featured and give ...
Illumination flares being used during military training exercises Flares being fired from a ship during a fleet review. A flare, also sometimes called a fusée, fusee, or bengala, [1] [2] bengalo [3] in several European countries, is a type of pyrotechnic that produces a bright light or intense heat without an explosion.
One launcher firing twelve rockets can completely blanket one square kilometre with cluster munitions; a typical MLRS cluster salvo would involve three M270 vehicles firing together. With each rocket containing 644 M77 submunitions, the entire salvo would drop 23,184 submunitions in the target area. However, at a two percent dud rate, that ...