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121 Poniatoff, Alexander Mathew
[br]b. 25 March 1892 Kazan District, Russiad. 24 October 1980[br]Russian (naturalized American in 1932) electrical engineer responsible for the development of the professional tape recorder and the first commercially-successful video tape recorder (VTR).[br]Poniatoff was educated at the University of Kazan, the Imperial College in Moscow, and the Technische Hochschule in Karlsruhe, gaining degrees in mechanical and electrical engineering. He was in Germany when the First World War broke out, but he managed to escape back to Russia, where he served as an Air Force pilot with the Imperial Russian Navy. During the Russian Revolution he was a pilot with the White Russian Forces, and escaped into China in 1920; there he found work as an assistant engineer in the Shanghai Power Company. In 1927 he immigrated to the USA, becoming a US citizen in 1932. He obtained a post in the research and development department of the General Electric Company in Schenectady, New York, and later at Dalmo Victor, San Carlos, California. During the Second World War he was involved in the development of airborne radar for the US Navy.In 1944, taking his initials to form the title, Poniatoff founded the AMPEX Corporation to manufacture components for the airborne radar developed at General Electric, but in 1946 he turned to the production of audio tape recorders developed from the German wartime Telefunken Magnetophon machine (the first tape recorder in the truest sense). In this he was supported by the entertainer Bing Crosby, who needed high-quality replay facilities for broadcasting purposes, and in 1947 he was able to offer a professional-quality product and the business prospered.With the rapid post-war boom in television broadcasting in the USA, a need soon arose for a video recorder to provide "time-shifting" of live TV programmes between the different US time zones. Many companies therefore endeavoured to produce a video tape recorder (VTR) using the same single-track, fixed-head, longitudinal-scan system used for audio, but the very much higher bandwidth required involved an unacceptably high tape-speed. AMPEX attempted to solve the problem by using twelve parallel tracks and a machine was demonstrated in 1952, but it proved unsatisfactory.The development team, which included Charles Ginsburg and Ray Dolby, then devised a four-head transverse-scan system in which a quadruplex head rotating at 14,400 rpm was made to scan across the width of a 2 in. (5 cm) tape with a tape-to-head speed of the order of 160 ft/sec (about 110 mph; 49 m/sec or 176 km/h) but with a longitudinal tape speed of only 15 in./sec (0.38 m/sec). In this way, acceptable picture quality was obtained with an acceptable tape consumption. Following a public demonstration on 14 April 1956, commercial produc-tion of studio-quality machines began to revolutionize the production and distribution of TV programmes, and the perfecting of time-base correctors which could stabilize the signal timing to a few nanoseconds made colour VTRs a practical proposition. However, AMPEX did not rest on its laurels and in the face of emerging competition from helical scan machines, where the tracks are laid diagonally on the tape, the company was able to demonstrate its own helical machine in 1957. Another development was the Videofile system, in which 250,000 pages of facsimile could be recorded on a single tape, offering a new means of archiving information. By 1986, quadruplex VTRs were obsolete, but Poniatoff's role in making television recording possible deserves a place in history.Poniatoff was President of AMPEX Corporation until 1955 and then became Chairman of the Board, a position he held until 1970.[br]Further ReadingA.Abrahamson, 1953, "A short history of television recording", Part I, JSMPTE 64:73; 1973, Part II, Journal of the Society of Motion Picture and Television Engineers, 82:188 (provides a fuller background).Audio Biographies, 1961, ed. G.A.Briggs, Wharfedale Wireless Works, pp. 255–61 (contains a few personal details about Poniatoff's escape from Germany to join the Russian Navy).E.Larsen, 1971, A History of Invention.Charles Ginsburg, 1981, "The horse or the cowboy. Getting television on tape", Journal of the Royal Television Society 18:11 (a brief account of the AMPEX VTR story).KF / GB-NBiographical history of technology > Poniatoff, Alexander Mathew
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122 Watts, Philip
SUBJECT AREA: Ports and shipping[br]b. 30 May 1846 Portsmouth, Englandd. 15 March 1926 probably London, England[br]English naval architect, shipbuilding manager and ultimately Director of Naval Construction.[br]Since he had a long family connection with the naval base at Portsmouth, it is not surprising that Watts started to serve his apprenticeship there in 1860. He was singled out for advanced training and then in 1866 was one of three young men selected to attend the Royal School of Naval Architecture at South Kensington in London. On completing his training he joined the technical staff, then had a period as a ship overseer before going to assist William Froude for two years, an arrangement which led to a close friendship between Watts and the two Froudes. Some interesting tasks followed: the calculations for HM Armoured Ram Polyphemus; the setting up of a "calculating" section within the Admiralty; and then work as a constructor at Chatham Dockyard. In 1885 the first major change of direction took place: Watts resigned from naval service to take the post of General Manager of the Elswick shipyard of Sir W.G.Armstrong. This was a wonderful opportunity for an enthusiastic and highly qualified man, and Watts rose to the challenge. Elswick produced some of the finest warships at the end of the nineteenth century and its cruisers, such as the Esmeralda of the Chilean Navy, had a legendary name.In 1902 he was recalled to the Navy to succeed Sir William White as Director of Naval Construction (DNC). This was one of the most exciting times ever in warship design and it was during Watts's tenure of the post that the Dreadnought class of battleship was produced, the submarine service was developed and the destroyer fleet reached high levels of performance. It has been said that Watts's distinct achievements as DNC were greater armament per ton displacement, higher speeds and better manoeuvring, greater protection and, almost as important, elegance of appearance. Watt retired in 1912 but remained a consultant to the Admiralty until 1916, and then joined the board of Armstrong Whitworth, on which he served until his death.[br]Principal Honours and DistinctionsKnighted 1905. FRS 1900. Chairman, Board of Trade's Load Line Committee 1913. Vice-President, Society for Nautical Research (upon its founding), and finally Chairman for the Victory preservation and technical committee. Honorary Vice-President, Institution of Naval Architects 1916. Master of the Worshipful Company of Shipwrights 1915.BibliographyWatts produced many high-quality technical papers, including ten papers to the Institution of Naval Architects.FMW -
123 kahu huruhuru
Maori feathered cloak.The base of the cloak was made from f;ax fibre (muka) which had been washed, bleached to almost white and softened. The fibres would then be rolled together until a long yarn was formed, which was then woven into the large rectangle, shaped at the shoulders and hips. On to this was fastened the feathers, the most prized ones being those of the huia and kiwi ( especially the rare white albino kiwi). -
124 خفق
خَفَقَ \ beat (beat, beaten): to move (up and down) regularly: Her heart was beating fast. flap: to move up and down, or from side to side: Birds flap their wings. The flag was flapping in the wind. flutter: to shake, esp. in the wind: The flag was fluttering on its pole. throb: to beat regularly, as the heart beats. whip: to beat until stiff (usu. cream or the white of an egg): whipped cream. whisk: to beat (eggs) until they are light and full of air. \ خَفَقَ (الطائرُ) \ flutter: to move the wings noisily without actually flying: The birds were fluttering in the bushes. \ See Also رَفْرَفَ بجَنَاحَيْهِ -
125 beat (beat, beaten)
خَفَقَ \ beat (beat, beaten): to move (up and down) regularly: Her heart was beating fast. flap: to move up and down, or from side to side: Birds flap their wings. The flag was flapping in the wind. flutter: to shake, esp. in the wind: The flag was fluttering on its pole. throb: to beat regularly, as the heart beats. whip: to beat until stiff (usu. cream or the white of an egg): whipped cream. whisk: to beat (eggs) until they are light and full of air. -
126 flap
خَفَقَ \ beat (beat, beaten): to move (up and down) regularly: Her heart was beating fast. flap: to move up and down, or from side to side: Birds flap their wings. The flag was flapping in the wind. flutter: to shake, esp. in the wind: The flag was fluttering on its pole. throb: to beat regularly, as the heart beats. whip: to beat until stiff (usu. cream or the white of an egg): whipped cream. whisk: to beat (eggs) until they are light and full of air. -
127 flutter
خَفَقَ \ beat (beat, beaten): to move (up and down) regularly: Her heart was beating fast. flap: to move up and down, or from side to side: Birds flap their wings. The flag was flapping in the wind. flutter: to shake, esp. in the wind: The flag was fluttering on its pole. throb: to beat regularly, as the heart beats. whip: to beat until stiff (usu. cream or the white of an egg): whipped cream. whisk: to beat (eggs) until they are light and full of air. -
128 throb
خَفَقَ \ beat (beat, beaten): to move (up and down) regularly: Her heart was beating fast. flap: to move up and down, or from side to side: Birds flap their wings. The flag was flapping in the wind. flutter: to shake, esp. in the wind: The flag was fluttering on its pole. throb: to beat regularly, as the heart beats. whip: to beat until stiff (usu. cream or the white of an egg): whipped cream. whisk: to beat (eggs) until they are light and full of air.
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