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aspect ratio
aspect ratio usually refers to the ratio between the length of the luff and foot of a yacht's mainsail, but in some modern yachts may also refer to the ratio of the depth of a yacht's keel fin to its length. In the early days of Bermudan mainsails the aspect ratio used to be as low as... Read more |
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Eidophusikon
Eidophusikon (Gk.: ‘image of nature’). An entertainment invented by P. J. de Loutherbourg in which spectacular scenic effects were created on a small-scale stage set. Loutherbourg first exhibited the Eidophusikon in London in 1781 with immediate popular success (more than 100 paying... Read more |
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Themisto
Themisto A small satellite of Jupiter, distance 7 284 000 km; also known as Jupiter XVIII. It orbits every 130.0 days and is about 8 km in diameter. Themisto was first seen in 1975 but not confirmed until 2000, in both cases from ground‐based observations. It gives... Read more |
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Gangtok
Gangtok, Sikkim/India Situated at a height of 5 600 ft (1 700m), the name means ‘Top of the Hill’ from the Tibetan gang ‘hill’ and tok ‘top’ or ‘peak’. It was the capital of the Kingdom of Sikkim until the monarchy was... Read more |
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fluence
fluence A measure, widely used in studies of photosynthesis in plants, of the quantity of light. It is defined as the quantity of radiant energy falling on a small sphere divided by the cross-sectional area of the sphere, and can be expresssed in two ways. Photon fluence (units:... Read more |
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Netherlands East Indies
Netherlands East Indies (NEI), colony in South-East Asia covering a huge area some 3,660 km. (2,275 mi.) wide by 1,825 km. (1,135 mi.) long, including Java, Sumatra, Dutch Borneo, Dutch New Guinea, Celebes, western Timor, and Moluccas. It was vital to the economy of the... Read more |
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Ledo Road
Ledo Road, 770 km. (478 mi.) long India–China supply road and oil pipeline built through the mountainous area of northern Burma. It ran from Ledo (situated in India near the northern border with Burma) to Myitkyina in northern Burma, then Bhamo, and finally to Muse where it... Read more |
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western hemisphere
western hemisphere. In July 1940 Roosevelt declared at the Havana conference that the USA would be responsible for the defence of the western hemisphere. This area was then defined by Admiral King by drawing a line between the two hemispheres so that the western one extended from about 26°... Read more |
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Kuiper belt
Kuiper Belt A region of the outer Solar System containing an estimated 107 − 109 icy planetesimals, or comet nuclei. The Kuiper Belt is an inner, flattened extension of the Oort Cloud. It lies more or less in the same plane as the planets and extends outwards from around 30 AU (the orbit of... Read more |
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Doolittle raid
Doolittle raid. After the Japanese attacked Pearl Harbor in December 1941, Roosevelt pressed the US Joint Chiefs of Staff to retaliate. But the only way bombers could reach Japan was from a carrier which, if it was to escape detection, had to operate beyond the range of Japanese air and sea... Read more |
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