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1 кольцевая структура
Russian-English dictionary of telecommunications > кольцевая структура
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2 кольцевая структура
1) Mathematics: ringed structure2) Telecommunications: circular-type structure3) Oil: ring structure4) Makarov: circular structure, cyclic structure, ring-type structure5) Electrochemistry: ring-patternУниверсальный русско-английский словарь > кольцевая структура
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3 Anthemios of Tralles
SUBJECT AREA: Architecture and building[br]fl. sixth century AD Tralles, Lydia, Asia Minor[br]Greek architect, geometer, mathematician and physicist.[br]Tralles was a wealthy city in ancient Greece. Ruins of the city are situated on a plateau above the present-day Turkish city of Aydin, in Asia Minor, which is near to Ephesus. In 334 BC Tralles was used as a base by Alexander the Great and later it was occupied by the Romans. After the collapse of the western half of the Roman Empire in the fifth century AD Tralles remained a part of the Byzantine Empire until its destruction in 1282. Anthemios was one of the great sons of Tralles and was probably educated in Alexandria. He is especially famed as architect (with Isodorus of Miletos) of the great Church of Santa Sophia in Istanbul. This vast building, later a Turkish mosque and now a museum, was built for the Emperor Justinian between 532 and 537 AD. It was an early and, certainly for many centuries, the largest example of pendentive construction to support a dome. This form, using the spherical triangles of the pendentives, enabled a circular-based dome to be supported safely upon piers that stood on a square plan below. It gradually replaced the earlier squinch type of structure, though both forms of design stem from Middle Eastern origins. At Santa Sophia the dome rises to 180ft (55m) above floor level and has a diameter of over 100ft (30m). Together with Isodorus, Anthemios also worked upon the Church of the Holy Apostles in Istanbul.[br]Further ReadingG.L.Huxley, 1959, Anthemius of Tralles: A Study in Later Greek Geometry, Cambridge, Mass.: Harvard University Press.Procopius, 1913, De Aedificiis, On the Buildings Constructed by the Emperor Justinian, Leipzig.Richard Krautheimer, 1965, Early Christian and Byzantine Architcture, Penguin.DY -
4 Dickson, J.T.
[br]b. c.1920 Scotland[br]Scottish co-inventor of the polyester fibre, Terylene.[br]The introduction of one type of artificial fibre encouraged chemists to look for more. J.T.Dickson and J.R. Whinfield discovered one such fibre in 1941 when they derived polyester from terephthalic acid and ethylene glycol. Dickson, a 21-year-old Edinburgh graduate, was working under Whinfield at the Calico Printers' Association research laboratory at Broad Oak Print Works in Accrington. He was put onto fibre research: probably in April, but certainly by 5 July 1941, a murky-looking resin had been synthesized, out of which Dickson successfully drew a filament, which was named "Terylene" by its discoverers. Owing to restrictions imposed in Britain during the Second World War, this fibre was developed initially by the DuPont Company in the USA, where it was marketed under the name "Dacron". When Imperial Chemical Industries (ICI) were able to manufacture it in Britain, it acquired the brand name "Terylene" and became very popular. Under the microscope, Terylene appears identical to nylon: longitudinally, it is completely devoid of any structure and the filaments appear as glass rods with a perfectly circular cross-section. The uses of Terylene are similar to those of nylon, but it has two advantages. First, it can be heat-set by exposing the fabric to a temperature about 30°C higher than is likely to be encountered in everyday use, and therefore can be the basis for "easy-care" clothing such as drip-dry shirts. It can be blended with other fibres such as wool, and when pressed at a high temperature the creases are remarkably durable. It is also remarkably resistant to chemicals, which makes it particularly suitable for industrial purposes under conditions where other textile materials would be degraded rapidly. Dickson later worked for ICI.[br]Further ReadingFor accounts of the discovery of Terylene, see: J.R.Whinfield, 1953, Textile Research Journal (May). R.Collins, 1991, "Terylene", Historian 30 (Spring).Accounts of the introduction of svnthetic fibres are covered in: D.S.Lyle, 1982, Modern Textiles, New York.S.R.Cockett, An Introduction to Man-Made Fibres.G.R.Wray, Modern Yarn Production.RLH
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