-
1 Cady
-
2 cady|k
The New English-Polish, Polish-English Kościuszko foundation dictionary > cady|k
-
3 Cady, Walter Guyton
[br]b. 10 December 1874 Providence, Rhode Island, USAd. 9 December 1974 Providence, Rhode Island, USA[br]American physicist renowned for his pioneering work on piezo-electricity.[br]After obtaining BSc and MSc degrees in physics at Brown University in 1896 and 1897, respectively, Cady went to Berlin, obtaining his PhD in 1900. Returning to the USA he initially worked for the US Coast and Geodetic Survey, but in 1902 he took up a post at the Wesleyan University, Connecticut, remaining as Professor of Physics from 1907 until his retirement in 1946. During the First World War he became interested in piezo-electricity as a result of attending a meeting on techniques for detecting submarines, and after the war he continued to work on the use of piezo-electricity as a transducer for generating sonar beams. In the process he discovered that piezo-electric materials, such as quartz, exhibited high-stability electrical resonance, and in 1921 he produced the first working piezo-electric resonator. This idea was subsequently taken up by George Washington Pierce and others, resulting in very stable oscillators and narrow-band filters that are widely used in the 1990s in radio communications, electronic clocks and watches.Internationally known for his work, Cady retired from his professorship in 1946, but he continued to work for the US Navy. From 1951 to 1955 he was a consultant and research associate at the California Institute of Technology, after which he returned to Providence to continue research at Brown, filing his last patent (one of over fifty) at the age of 93 years.[br]Principal Honours and DistinctionsPresident, Institute of Radio Engineers 1932. London Physical Society Duddell Medal. Institute of Electrical and Electronics Engineers Morris N.Liebmann Memorial Prize 1928.Bibliography28 January 1920, US patent no. 1,450,246 (piezo-electric resonator).1921, "The piezo-electric resonator", Physical Review 17:531. 1946, Piezoelectricity, New York: McGraw Hill (his classic work).Further ReadingB.Jaffe, W.R.Cooke \& H.Jaffe, 1971, Piezoelectric Ceramics.KF -
4 cady-koe
• pop test• Cady-test• Mullen test -
5 Cady test
Англо-русский словарь промышленной и научной лексики > Cady test
-
6 Stanton
f.Stanton, Elizabeth Cady Stanton.m.Stanton, Elizabeth Cady Stanton. -
7 испытание на сопротивление продавливанию
2) Polygraphy: bursting strength determinationУниверсальный русско-английский словарь > испытание на сопротивление продавливанию
-
8 кади
3) leg.N.P. kadhi, qadi, qazi -
9 кепка
1) General subject: cap, peaked cap, peaky cap, cloth cap, lid2) Colloquial: topper4) Clothing: flat cap5) Mountain climbing: travelling cap -
10 мужская шляпа
-
11 Electricity
-
12 Electronics and information technology
See also: INDEX BY SUBJECT AREA[br]Byron, Ada AugustaNapier, JohnRiche, Gaspard-Clair-François-MarieSchickhard, WilhelmBiographical history of technology > Electronics and information technology
-
13 Horology
See also: INDEX BY SUBJECT AREA[br]Ctesibius of AlexandriaGrimthorpe, Edmund Beckett, BaronSu SongYi-XingZhang Sixun -
14 Marrison, Warren Alvin
[br]b. 21 May 1896 Inverary, Canadad. 27 March 1980 Palo Verdes Estates, California, USA[br]Canadian (naturalized American) electrical engineer, pioneer of the quartz clock.[br]Marrison received his high-school education at Kingston Collegiate Institute, Ontario, and in 1914 he entered Queen's University in Kingston. He graduated in Engineering Physics in 1920, his college career having been interrupted by war service in the Royal Flying Corps. During his service in the Flying Corps he worked on radio, and when he returned to Kingston he established his own transmitter. This interest in radio was later to influence his professional life.In 1921 he entered Harvard University, where he obtained an MA, and shortly afterwards he joined the Western Electric Company in New York to work on the recording of sound on film. In 1925 he transferred to Western Electric's Bell Laboratory, where he began what was to become his life's work: the development of frequency standards for radio transmission. In 1922 Cady had used the elastic vibration of a quartz crystal to control the frequency of a valve oscillator, but at that time there was no way of counting and displaying the number of vibrations as the frequency was too high. In 1927 Marrison succeeded in dividing the frequency electronically until it was low enough to drive a synchronous motor. Although his purpose was to determine the frequency accurately by counting the number of vibrations that occurred in a given time, he had incidentally produced the first quartz-crystal -ontrolled clock. The results were sufficiently encouraging for him to build an improved version the following year, specifically as a time and frequency standard.[br]Principal Honours and DistinctionsBritish Horological Institute Gold Medal 1947. Clockmakers' Company Tompion Medal 1955.Bibliography1928, with J.W.Horton, "Precision measurement of frequency", Proceedings of the Institute of Radio Engineers 16:137–54 (provides details of the original quartz clock, although it was not described as such).1930, "The crystal clock", Proceedings of the National Academy of Sciences 16:496–507 (describes the second clock).Further ReadingW.R.Topham, 1989, "Warren A.Marrison—pioneer of the quartz revolution", NAWCC Bulletin 31(2):126–34.J.D.Weaver, 1982, Electrical and Electronic Clocks and Watches, London (a technical assessment of his work on the quartz clock).DV -
15 Pierce, George Washington
SUBJECT AREA: Electronics and information technology[br]b. 11 January 1872 Austin, Texas, USAd. 25 August 1956 Franklin, New Hampshire, USA[br]American physicist who made various contributions to electronics, particularly crystal oscillators.[br]Pierce entered the University of Texas in 1890, gaining his BSc in physics in 1893 and his MSc in 1894. After teaching and doing various odd jobs, in 1897 he obtained a scholarship to Harvard, obtaining his PhD three years later. Following a period at the University of Leipzig, he returned to the USA in 1903 to join the teaching staff at Harvard, where he soon established new courses and began to gain a reputation as a pioneer in electronics, including the study of crystal rectifiers and publication of a textbook on wireless telegraphy. In 1912, with Kennelly, he conceived the idea of motional impedance. The same year he was made first Director of Harvard's Cruft High- Tension Electrical Laboratory, a post he held until his retirement. In 1917 he was appointed Professor of Physics, and for the remainder of the First World War he was also involved in work on submarine detection at the US Naval Base in New London. In 1921 he was appointed Rumford Professor of Physics and became interested in the work of Walter Cady on crystal-controlled circuits. As a result of this he patented the Pierce crystal oscillator in 1924. Having discovered the magnetostriction property of nickel and nichrome, in 1928 he also invented the magnetostriction oscillator. The mercury-vapour discharge lamp is also said to have been his idea. He became Gordon McKay Professor of Physics and Communications in 1935 and retired from Harvard in 1940, but he remained active for the rest of his life with the study of sound generation by birds and insects.[br]Principal Honours and DistinctionsPresident, Institute of Radio Engineers 1918–19. Institute of Electrical and Electronics Engineers Medal of Honour 1929.Bibliography1910, Principles of Wireless Telegraphy.1914, US patent no. 1,450,749 (a mercury vapour tube control circuit). 1919, Electrical Oscillations and Electric Waves.1922, "The piezo-electric Resonator", Proceedings of the Institute of Radio Engineers 10:83.Further ReadingF.E.Terman, 1943, Radio Engineers'Handbook, New York: McGraw-Hill (for details of piezo-electric crystal oscillator circuits).KFBiographical history of technology > Pierce, George Washington
-
16 Telecommunications
См. также в других словарях:
Cady — can refer to:People* Charlie Cady, baseball player * Claude E. Cady, politician * Daniel Cady, jurist (father of Elizabeth Cady Stanton) * E. F. Cady * Frank Cady, actor * Hamilton Cady, chemist * Harrison Cady, illustrator * Hick Cady, baseball… … Wikipedia
Cady — ist der Name von Cady (Michigan), Ort in den Vereinigten Staaten Cady (Virginia), Ort in den Vereinigten Staaten Cady (Wisconsin), Ort in den Vereinigten Staaten Cady ist der Familienname folgender Personen: Carol Cady (* 1962), US amerikanische… … Deutsch Wikipedia
Cady — Cad y, n. See {Cadie}. [1913 Webster] || … The Collaborative International Dictionary of English
Cady — Le nom est surtout porté dans le Maine et Loire, où il est attesté depuis le XVIe siècle. Sens obscur. Une éventuelle origine bretonne permettrait d en faire une variante de Cadic (voir ce nom). Un rapport avec l ancien français cadit (rente dont … Noms de famille
cady — hat, cap, 1846, of unknown origin … Etymology dictionary
Cady — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Cady, rivière des Pyrénées Orientales Frank Cady, acteur américain John Cady, golfeur américain Voir aussi Cadi : juge musulman Tunnel du Cadi … Wikipédia en Français
Cady — This unusual name has a number of possible sources, each with its own distinctive history and derivation. Firstly, it may be of Anglo Saxon origin, representing a rare survival of the native Olde English personal name or byname Cada , from an Old … Surnames reference
cady — Caddie Cad die, n. [Written also {caddy}, {cadie}, {cady}, and {cawdy}.] [See {Cadet}.] 1. A cadet. [Obs. Scot.] [Webster 1913 Suppl.] 2. A lad; young fellow. [Scot.] Burns. [Webster 1913 Suppl.] 3. One who does errands or other odd jobs. [Scot.] … The Collaborative International Dictionary of English
cady — Cadie Cad ie, Caddie Cad die, n. A Scotch errand boy, porter, or messenger. [Written also {cady}.] [1913 Webster] Every Scotchman, from the peer to the cadie. Macaulay. [1913 Webster] … The Collaborative International Dictionary of English
Cady (Rivière) — Pour les articles homonymes, voir Cady. Cady ajouter une photo Caractéristiques Longueur ? Bassin ? … Wikipédia en Français
Cady (riviere) — Cady (rivière) Pour les articles homonymes, voir Cady. Cady ajouter une photo Caractéristiques Longueur ? Bassin ? … Wikipédia en Français