-
1 Kennelly, Arthur Edwin
[br]b. 17 December 1871 Colaba, Bombay, Indiad. 18 June 1939 Boston, Massachusetts, USA[br]Anglo-American electrical engineer who predicted the ionosphere and developed mathematical analysis for electronic circuits.[br]As a young man, Kennelly worked as office boy for a London engineering society, as an electrician and on a cable-laying ship. In 1887 he went to work for Thomas Edison at West Orange, New Jersey, USA, becoming his chief assistant. In 1894, with Edwin J.Houston, he formed the Philadelphia company of Houston and Kennelly, but eight years later he took up the Chair of Electrical Engineering at Harvard, a post he held until his retirement in 1930. In 1902 he noticed that the radio signals received by Marconi in Nova Scotia from the transmitter in England were stronger than predicted and postulated a reflecting ionized layer in the upper atmosphere. Almost simultaneously the same prediction was made in England by Heaviside, so the layer became known as the Kennelly-Heaviside layer. Throughout most of his working life Kennelly was concerned with the application of mathematical techniques, particularly the use of complex theory, to the analysis of electrical circuits. With others he also contributed to an understanding of the high-frequency skin-effect in conductors.[br]Principal Honours and DistinctionsPresident, American Institute of Electrical Engineers 1898–1900. President, Institution of Electrical Engineers 1916. Institute of Electrical and Electronics Engineers Medal of Honour 1932; Edison Medal 1933.Bibliography1915, with F.A.Laws \& P.H.Pierce "Experimental research on the skin effect in conductors", Transactions of the American Institute of Electrical Engineers 34:1,953.1924, Hyperbolic Functions as Applied to Electrical Engineering.1924, Check Atlas of Complex Hyperbolic \& Circular Functions (both on mathematics for circuit analysis).Further ReadingK.Davies, 1990, Ionospheric Radio, London: Peter Peregrinus. See also Appleton, Sir Edward Victor.KF -
2 Kennelly
m.Kennelly, Arthur Edwin Kennelly. -
3 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
-
4 Telecommunications
-
5 Broadcasting
See also: INDEX BY SUBJECT AREA[br] -
6 Electricity
-
7 Eccles, William Henry
[br]b. 23 August 1875 Ulverston, Cumbria, Englandd. 27 April 1966 Oxford, England[br]English physicist who made important contributions to the development of radio communications.[br]After early education at home and at private school, Eccles won a scholarship to the Royal College of Science (now Imperial College), London, where he gained a First Class BSc in physics in 1898. He then worked as a demonstrator at the college and studied coherers, for which he obtained a DSc in 1901. Increasingly interested in electrical engineering, he joined the Marconi Company in 1899 to work on oscillators at the Poole experimental radio station, but in 1904 he returned to academic life as Professor of Mathematics and Physics and Department Head at South West Polytechnic, Chelsea. There he discovered ways of using the negative resistance of galena-crystal detectors to generate oscillations and gave a mathematical description of the operation of the triode valve. In 1910 he became Reader in Engineering at University College, London, where he published a paper explaining the reflection of radio waves by the ionosphere and designed a 60 MHz short-wave transmitter. From 1916 to 1926 he was Professor of Applied Physics and Electrical Engineering at the Finsbury City \& Guilds College and a private consulting engineer. During the First World War he was a military scientific adviser and Secretary to the Joint Board of Scientific Societies. After the war he made many contributions to electronic-circuit development, many of them (including the Eccles-Jordan "flip-flop" patented in 1918 and used in binary counters) in conjunction with F.W.Jordan, about whom little seems to be known. Illness forced Eccles's premature academic retirement in 1926, but he remained active as a consultant for many years.[br]Principal Honours and DistinctionsFRS 1921. President, Institution of Electrical Engineers, 1926–7. President, Physical Society 1929. President, Radio Society of Great Britain.Bibliography1912, "On the diurnal variation of the electric waves occurring in nature and on the propagation of electric waves round the bend of the earth", Proceedings of the Royal Society 87:79. 1919, with F.W.Jordan, "Method of using two triode valves in parallel for generating oscillations", Electrician 299:3.1915, Handbook of Wireless Telegraphy.1921, Continuous Wave Wireless Telegraphy.Further Reading1971, "William Henry Eccles, 1875–1966", Biographical Memoirs of the Royal Society, London, 17.KF
См. также в других словарях:
Kennelly, Arthur Edwin — ▪ American electrical engineer born Dec. 17, 1861, Colaba, India died June 18, 1939, Boston U.S. electrical engineer who made innovations in analytic methods in electronics, particularly the definitive application of complex number theory… … Universalium
Kennelly, Arthur Edwin — ► (1861 1939) Físico estadounidense. Autor, con Heaviside, de una teoría sobre las capas de ionización de la atmósfera … Enciclopedia Universal
Arthur Edwin Kennelly — Saltar a navegación, búsqueda Arthur Edwin Kennelly (Colaba, 17 de diciembre de 1861 Boston, 18 de junio de 1939) fue un ingeniero eléctrico americano. Kennelly nació en Colaba, cerca de Bombay en la India y fue educado en la University College… … Wikipedia Español
Arthur Edwin Kennelly — Arthur Edwin Kennelly, (17 décembre, 1861 18 juin, 1939), ingénieur en électricité américain, fils d un officier naval irlandais, né à Colaba près de Bombay, Inde, décédé à Boston, Massachusetts. Il est célèbre pour avoir découvert des propriétés … Wikipédia en Français
Arthur Edwin Kennelly — (* 17. Dezember 1861 in Colaba (Mumbai), Indien; † 18. Juni 1939 in Boston) war ein US amerikanischer Elektroingenieur. Bereits in jungen Jahren zeigte er großes Interesse an dem sich schnell ausweitenden Gebiet der Elektrizität. Im Alter von 26… … Deutsch Wikipedia
Arthur Edwin Kennelly — noun United States electrical engineer noted for his work on the theory of alternating currents; independently of Oliver Heaviside he discovered the existence of an atmospheric layer that reflects radio waves back to earth (1861 1939) • Syn:… … Useful english dictionary
Kennelly — Kennelly, Arthur Edwin … Enciclopedia Universal
Arthur E. Kennelly — Arthur Edwin Kennelly Arthur Edwin Kennelly, (17 décembre, 1861 18 juin, 1939), ingénieur en électricité américain, fils d un officier naval irlandais, né à Colaba près de Bombay, Inde, décédé à Boston, Massachusetts. Il est célèbre pour avoir… … Wikipédia en Français
Arthur Kennelly — Arthur Edwin Kennelly Arthur Edwin Kennelly, (17 décembre, 1861 18 juin, 1939), ingénieur en électricité américain, fils d un officier naval irlandais, né à Colaba près de Bombay, Inde, décédé à Boston, Massachusetts. Il est célèbre pour avoir… … Wikipédia en Français
Kennelly — Arthur Edwin Kennelly Arthur Edwin Kennelly, (17 décembre, 1861 18 juin, 1939), ingénieur en électricité américain, fils d un officier naval irlandais, né à Colaba près de Bombay, Inde, décédé à Boston, Massachusetts. Il est célèbre pour avoir… … Wikipédia en Français
Kennelly — noun United States electrical engineer noted for his work on the theory of alternating currents; independently of Oliver Heaviside he discovered the existence of an atmospheric layer that reflects radio waves back to earth (1861 1939) • Syn: ↑A.… … Useful english dictionary
