Vivien Leigh

Arthur Edwin Kennelly , (December 17th, 1861 - June 18th, 1939), engineer in electricity states-unien, wire of a naval officer Irish, born with Colaba close to Bombay, India, deceased with Boston, Massachusetts.

It is famous to have discovered radioelectric properties of a layer of the atmosphere: the Ionosphere.

Career

Kennelly was boy of office during two years with London in the company of the Engineers of the Telegraph (become then the IEE). Extremely of this experiment it leaves the England for a station of assistant electrician to Malta.
  • 1878 : electrician as a chief on a Cable-laying ship with vapor.
  • 1881 : electrician of edge for the Eastern company of the telegraph.
  • 1886 : Kennelly leaves for the the United States America.
  • 1887 : joined the personnel of Thomas Alva Edison as a principal electric assistance, acting as electrician consulting for Edison General Electric and companies of the General Electric.
  • 1888 : assigned by Thomas Alva Edison to supervise the searchs for Harold P. Brown on the electrocution of animals in order to work out an effective and “human” solution of execution of the criminals.
  • 1894 : leave Edison and created, with Edwin James Houston the consulting, Houston company & Kennelly, electric engineers, with Philadelphia.
  • 1902 : the Mexican government names it to deal with the installation of the cable Vera Cruz - Frontera- Campeche. This same year, Kennelly directs its activities of the business world towards the academic world. It is used as electric professor of engineering with the Université Harvard of 1902 with 1930 and also with the Massachusetts Institute of Technology of 1913 for 1924.
It was also, professor in science applied in France of 1921 to 1922, researcher associated with the establishment with Carnegie between 1924 and 1930, and the first reader lecturer in electricity with the Fondation Iwadare with the Japan, in 1931.

The contributions of Kennelly to the electricity are numerous. In 1893, it presented a document relating to the impedance to the American institute of the engineers in electricity during which it exposes the first use of the complex numbers for the Loi of Ohm in the theory of the circuit of alternative course. It also proposed the use of the hyperbolic functions complex in the solution of the problems of line.

Independently of Oliver Heaviside, Kennelly proposed the existence of a ionized layer in the upper atmosphere, known now by the name of Kennelly-Heaviside layer, like surfaces reflective with the radioelectric waves making the communication transoceanic wireless telegraphy possible, in particular by the study of the experiments of Guglielmo Marconi in 1901.

Kennelly accepted many international rewards, in particular:

  • IEE Institution Premium in 1887
  • the gold medal of Howard Potts of the institute Franklin (1917)
  • the cross of Knight of the French Legion of honor
  • the AIEE Edison Medal (1933)
  • medal of honor of ANGER in 1932, for its studies of the radioelectric phenomena of propagation and its contributions in the theory and to the methods of measurement in the field of the alternative course.

He was an active partner of the company doctors such as the company for the promotion of the metric system of the weights and measurements and president of the AIEE (1898 - 1900) and ANGER (1916).

Quotations

“Through the radio, I consider the United States of the world. The radio standardizes the people of the ground, English will become the universal language because it is mainly the language of the   ether. The most important aspect of the radio is its sociological influence”.

See too

Related articles

Random links:-290 | 1964 | Ayguesvives | Financial institution | George-Daniel de Monfreid | Francic literature | Vivien_Leigh