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1 British Physical Laboratories
Trademark term: BPLУниверсальный русско-английский словарь > British Physical Laboratories
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2 BPL
1) Компьютерная техника: Broadband Power Line2) Американизм: Below Poverty Line3) Военный термин: Back Plate Latch4) Техника: bandpass limiter, bone phosphate of lime, brown phosphatic lime6) Экономика: ниже прожиточного минимума, ниже уровня нищеты7) Сокращение: Boston Public Library, Branch if PLus8) Электроника: Broadband over Power Lines9) Вычислительная техника: Bytes Per Line, Branch if PLus (Instruction)10) Фирменный знак: British Physical Laboratories11) Фармация: бета-пропиолактон12) Майкрософт: высокоскоростное соединение по силовым линиям13) NYSE. Buckeye Partners, L. P.14) Библиотечное дело: Brooklyn Public Library -
3 bpl
1) Компьютерная техника: Broadband Power Line2) Американизм: Below Poverty Line3) Военный термин: Back Plate Latch4) Техника: bandpass limiter, bone phosphate of lime, brown phosphatic lime6) Экономика: ниже прожиточного минимума, ниже уровня нищеты7) Сокращение: Boston Public Library, Branch if PLus8) Электроника: Broadband over Power Lines9) Вычислительная техника: Bytes Per Line, Branch if PLus (Instruction)10) Фирменный знак: British Physical Laboratories11) Фармация: бета-пропиолактон12) Майкрософт: высокоскоростное соединение по силовым линиям13) NYSE. Buckeye Partners, L. P.14) Библиотечное дело: Brooklyn Public Library -
4 Haber, Fritz
SUBJECT AREA: Chemical technology[br]b. 9 December 1868 Breslau, Germany (now Wroclaw, Poland)d. 29 January 1934 Basel, Switzerland[br]German chemist, inventor of the process for the synthesis of ammonia.[br]Haber's father was a manufacturer of dyestuffs, so he studied organic chemistry at Berlin and Heidelberg universities to equip him to enter his father's firm. But his interest turned to physical chemistry and remained there throughout his life. He became Assistant at the Technische Hochschule in Karlsruhe in 1894; his first work there was on pyrolysis and electrochemistry, and he published his Grundrisse der technischen Electrochemie in 1898. Haber became famous for thorough and illuminating theoretical studies in areas of growing practical importance. He rose through the academic ranks and was appointed a full professor in 1906. In 1912 he was also appointed Director of the Institute of Physical Chemistry and Electrochemistry at Dahlem, outside Berlin.Early in the twentieth century Haber invented a process for the synthesis of ammonia. The English chemist and physicist Sir William Crookes (1832–1919) had warned of the danger of mass hunger because the deposits of Chilean nitrate were becoming exhausted and nitrogenous fertilizers would not suffice for the world's growing population. A solution lay in the use of the nitrogen in the air, and the efforts of chemists centred on ways of converting it to usable nitrate. Haber was aware of contemporary work on the fixation of nitrogen by the cyanamide and arc processes, but in 1904 he turned to the study of ammonia formation from its elements, nitrogen and hydrogen. During 1907–9 Haber found that the yield of ammonia reached an industrially viable level if the reaction took place under a pressure of 150–200 atmospheres and a temperature of 600°C (1,112° F) in the presence of a suitable catalyst—first osmium, later uranium. He devised an apparatus in which a mixture of the gases was pumped through a converter, in which the ammonia formed was withdrawn while the unchanged gases were recirculated. By 1913, Haber's collaborator, Carl Bosch had succeeded in raising this laboratory process to the industrial scale. It was the first successful high-pressure industrial chemical process, and solved the nitrogen problem. The outbreak of the First World War directed the work of the institute in Dahlem to military purposes, and Haber was placed in charge of chemical warfare. In this capacity, he developed poisonous gases as well as the means of defence against them, such as gas masks. The synthetic-ammonia process was diverted to produce nitric acid for explosives. The great benefits and achievement of the Haber-Bosch process were recognized by the award in 1919 of the Nobel Prize in Chemistry, but on account of Haber's association with chemical warfare, British, French and American scientists denounced the award; this only added to the sense of bitterness he already felt at his country's defeat in the war. He concentrated on the theoretical studies for which he was renowned, in particular on pyrolysis and autoxidation, and both the Karlsruhe and the Dahlem laboratories became international centres for discussion and research in physical chemistry.With the Nazi takeover in 1933, Haber found that, as a Jew, he was relegated to second-class status. He did not see why he should appoint staff on account of their grandmothers instead of their ability, so he resigned his posts and went into exile. For some months he accepted hospitality in Cambridge, but he was on his way to a new post in what is now Israel when he died suddenly in Basel, Switzerland.[br]Bibliography1898, Grundrisse der technischen Electrochemie.1927, Aus Leben und Beruf.Further ReadingJ.E.Coates, 1939, "The Haber Memorial Lecture", Journal of the Chemical Society: 1,642–72.M.Goran, 1967, The Story of Fritz Haber, Norman, OK: University of Oklahoma Press (includes a complete list of Haber's works).LRD -
5 Kompfner, Rudolph
[br]b. 16 May 1909 Vienna, Austriad. 3 December 1977 Stanford, California, USA[br]Austrian (naturalized English in 1949, American in 1957) electrical engineer primarily known for his invention of the travelling-wave tube.[br]Kompfner obtained a degree in engineering from the Vienna Technische Hochschule in 1931 and qualified as a Diplom-Ingenieur in Architecture two years later. The following year, with a worsening political situation in Austria, he moved to England and became an architectural apprentice. In 1936 he became Managing Director of a building firm owned by a relative, but at the same time he was avidly studying physics and electronics. His first patent, for a television pick-up device, was filed in 1935 and granted in 1937, but was not in fact taken up. In June 1940 he was interned on the Isle of Man, but as a result of a paper previously sent by him to the Editor of Wireless Engineer he was released the following December and sent to join the group at Birmingham University working on centimetric radar. There he worked on klystrons, with little success, but as a result of the experience gained he eventually invented the travelling-wave tube (TWT), which was based on a helical transmission line. After disbandment of the Birmingham team, in 1946 Kompfner moved to the Clarendon Laboratory at Oxford and in 1947 he became a British subject. At the Clarendon Laboratory he met J.R. Pierce of Bell Laboratories, who worked out the theory of operation of the TWT. After gaining his DPhil at Oxford in 1951, Kompfner accepted a post as Principal Scientific Officer at Signals Electronic Research Laboratories, Baldock, but very soon after that he was invited by Pierce to work at Bell on microwave tubes. There, in 1952, he invented the backward-wave oscillator (BWO). He was appointed Director of Electronics Research in 1955 and Director of Communications Research in 1962, having become a US citizen in 1957. In 1958, with Pierce, he designed Echo 1, the first (passive) satellite, which was launched in August 1960. He was also involved with the development of Telstar, the first active communications satellite, which was launched in 1962. Following his retirement from Bell in 1973, he continued to pursue research, alternately at Stanford, California, and Oxford, England.[br]Principal Honours and DistinctionsPhysical Society Duddell Medal 1955. Franklin Institute Stuart Ballantine Medal 1960. Institute of Electrical and Electronics Engineers David Sarnoff Award 1960. Member of the National Academy of Engineering 1966. Member of the National Academy of Science 1968. Institute of Electrical and Electronics Engineers Medal of Honour 1973. City of Philadelphia John Scott Award 1974. Roentgen Society Silvanus Thompson Medal 1974. President's National medal of Science 1974. Honorary doctorates Vienna 1965, Oxford 1969.Bibliography1944, "Velocity modulated beams", Wireless Engineer 17:262.1942, "Transit time phenomena in electronic tubes", Wireless Engineer 19:3. 1942, "Velocity modulating grids", Wireless Engineer 19:158.1946, "The travelling-wave tube", Wireless Engineer 42:369.1964, The Invention of the TWT, San Francisco: San Francisco Press.Further ReadingJ.R.Pierce, 1992, "History of the microwave tube art", Proceedings of the Institute of Radio Engineers: 980.KF -
6 Thomson, Sir William, Lord Kelvin
[br]b. 26 June 1824 Belfast, Ireland (now Northern Ireland)d. 17 December 1907 Largs, Scotland[br]Irish physicist and inventor who contributed to submarine telegraphy and instrumentation.[br]After education at Glasgow University and Peterhouse, Cambridge, a period of study in France gave Thomson an interest in experimental work and instrumentation. He became Professor of Natural Philosophy at Glasgow in 1846 and retained the position for the rest of his career, establishing the first teaching laboratory in Britain.Among his many contributions to science and engineering was his concept, introduced in 1848, of an "absolute" zero of temperature. Following on from the work of Joule, his investigations into the nature of heat led to the first successful liquefaction of gases such as hydrogen and helium, and later to the science of low-temperature physics.Cable telegraphy gave an impetus to the scientific measurement of electrical quantities, and for many years Thomson was a member of the British Association Committee formed in 1861 to consider electrical standards and to develop units; these are still in use. Thomson first became Scientific Adviser to the Atlantic Telegraph Company in 1857, sailing on the Agamemnon and Great Eastern during the cable-laying expeditions. He invented a mirror galvanometer and more importantly the siphon recorder, which, used as a very sensitive telegraph receiver, provided a permanent record of signals. He also laid down the design parameters of long submarine cables and discovered that the conductivity of copper was greatly affected by its purity. A major part of the success of the Atlantic cable in 1866 was due to Thomson, who received a knighthood for his contribution.Other instruments he designed included a quadrant electrostatic voltmeter to measure high voltages, and his "multi-cellular" instrument for low voltages. They could be used on alternating or direct current and were free from temperature errors. His balances for precision current measurement were widely used in standardizing laboratories.Thomson was a prolific writer of scientific papers on subjects across the whole spectrum of physics; between 1855 and 1866 he published some 110 papers, with a total during his life of over 600. In 1892 he was raised to the peerage as Baron Kelvin of Largs. By the time of his death he was looked upon as the "father" of British physics, but despite his outstanding achievements his later years were spent resisting change and progress.[br]Principal Honours and DistinctionsKnighted 1866. Created Lord Kelvin of Largs 1892. FRS 1851. President, Royal Society 1890–4. An original member of the Order of Merit 1902. President, Society of Telegraph Engineers 1874. President, Institution of Electrical Engineers 1889 and 1907. Royal Society Royal Medal 1856, Copley Medal 1883.Bibliography1872, Reprints of Papers on Electrostatics and Magnetism, London; 1911, Mathematical and Physical Papers, 6 vols, Cambridge (collections of Thomson's papers).Further ReadingSilvanus P.Thompson, 1910, The Life of William Thomson, Baron Kelvin of Largs, 2 vols, London (an uncritical biography).D.B.Wilson, 1987, Kelvin and Stokes: A Comparative Study in Victorian Physics, Bristol (provides a present-day commentary on all aspects of Thomson's work).J.G.Crowther, 1962, British Scientists of the 19th Century, London, pp. 199–257 (a short critical biography).GWBiographical history of technology > Thomson, Sir William, Lord Kelvin
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7 Charpy, Augustin Georges Albert
SUBJECT AREA: Metallurgy[br]b. 1 September 1865 Ouillins, Rhône, Franced. 25 November 1945 Paris, France[br]French metallurgist, originator of the Charpy pendulum impact method of testing metals.[br]After graduating in chemistry from the Ecole Polytechnique in 1887, Charpy continued to work there on the physical chemistry of solutions for his doctorate. He joined the Laboratoire d'Artillerie de la Marine in 1892 and began to study the structure and mechanical properties of various steels in relation to their previous heat treatment. His first memoir, on the mechanical properties of steels quenched from various temperatures, was published in 1892 on the advice of Henri Le Chatelier. He joined the Compagnie de Chatillon Commentry Fourchamboult et Decazeville at their steelworks in Imphy in 1898, shortly after the discovery of Invar by G.E. Guillaume. Most of the alloys required for this investigation had been prepared at Imphy, and their laboratories were therefore well equipped with sensitive and refined dilatometric facilities. Charpy and his colleague L.Grenet utilized this technique in many of their earlier investigations, which were largely concerned with the transformation points of steel. He began to study the magnetic characteristics of silicon steels in 1902, shortly after their use as transformer laminations had first been proposed by Hadfield and his colleagues in 1900. Charpy was the first to show that the magnetic hysteresis of these alloys decreased rapidly as their grain size increased.The first details of Charpy's pendulum impact testing machine were published in 1901, about two years before Izod read his paper to the British Association. As with Izod's machine, the energy of fracture was measured by the retardation of the pendulum. Charpy's test pieces, however, unlike those of Izod, were in the form of centrally notched beams, freely supported at each end against rigid anvils. This arrangement, it was believed, transmitted less energy to the frame of the machine and allowed the energy of fracture to be more accurately measured. In practice, however, the blow of the pendulum in the Charpy test caused visible distortion in the specimen as a whole. Both tests were still widely used in the 1990s.In 1920 Charpy left Imphy to become Director-General of the Compagnie des Aciéries de la Marine et Homecourt. After his election to the Académie des Sciences in 1918, he came to be associated with Floris Osmond and Henri Le Chatelier as one of the founders of the "French School of Physical Metallurgy". Around the turn of the century he had contributed much to the development of the metallurgical microscope and had helped to introduce the Chatelier thermocouple into the laboratory and to industry. He also popularized the use of platinum-wound resistance furnaces for laboratory purposes. After 1920 his industrial responsibilities increased greatly, although he continued to devote much of his time to teaching at the Ecole Supérieure des Mines in Paris, and at the Ecole Polytechnique. His first book, Leçons de Chimie (1892, Paris), was written at the beginning of his career, in association with H.Gautier. His last, Notions élémentaires de sidérurgie (1946, Paris), with P.Pingault as co-author, was published posthumously.[br]BibliographyCharpy published important metallurgical papers in Comptes rendus… Académie des Sciences, Paris.Further ReadingR.Barthélémy, 1947, "Notice sur la vie et l'oeuvre de Georges Charpy", Notices et discours, Académie des Sciences, Paris (June).M.Caullery, 1945, "Annonce du décès de M.G. Charpy" Comptes rendus Académie des Sciences, Paris 221:677.P.G.Bastien, 1963, "Microscopic metallurgy in France prior to 1920", Sorby Centennial Symposium on the History of Metallurgy, AIME Metallurgical Society Conference Vol.27, pp. 171–88.ASDBiographical history of technology > Charpy, Augustin Georges Albert
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