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Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
The strength of the prism is increased until the streak of the light passes through the centre of the prism, as the strength of the prism indicates the amount of deviation present. The Maddox rod is a handheld instrument composed of red parallel plano convex cylinder lens , which refracts light rays so that a point source of light is seen as a ...
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The new attraction—The Dolly Parton Experience—is located where the previous museum was, the Chasing Rainbows Museum. Now, there's a giant sparkling pink and purple butterfly to greet you ...
RS(528,514, 7,10), adding 14 correction bits to the 512b/514b code word, allowing to correct up to 7 corrupted bits. Overhead is 3%, same as 64b/66b encoding; RS(544,514,14,10), adding 30 correction bits to the 512b/514b code word, allowing to correct up to 15 corrupted bits. Overhead is 6%.
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The compass was invented in China during the Han dynasty between the 2nd century BC and 1st century AD where it was called the "south-governor" ( sīnán 司南) or "South Pointing Fish" ( 指南魚 ). [3] The magnetic compass was not, at first, used for navigation, but for geomancy and fortune-telling by the Chinese.
Operation Paperclip. Kurt H. Debus, a former V-2 rocket scientist who became a NASA director, sitting between U.S. President John F. Kennedy and U.S. Vice President Lyndon B. Johnson in 1962 at a briefing at Blockhouse 34, Cape Canaveral Missile Test Annex. Operation Paperclip was a secret United States intelligence program in which more than ...
XTEA. In cryptography, XTEA ( eXtended TEA) is a block cipher designed to correct weaknesses in TEA. The cipher 's designers were David Wheeler and Roger Needham of the Cambridge Computer Laboratory, and the algorithm was presented in an unpublished technical report in 1997 (Needham and Wheeler, 1997).
The Global Positioning System ( GPS ), originally Navstar GPS, [2] is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. [3] It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near ...