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Lee de Forest was born in 1873 in Council Bluffs, Iowa, the son of Anna Margaret (née Robbins) and Henry Swift DeForest. [1] [2] He was a direct descendant of Jessé de Forest, the leader of a group of Walloon Huguenots who fled Europe in the 17th century due to religious persecution.
In 1906, Lee De Forest of the US added a control "grid" to the valve to create an amplifying vacuum tube RF detector called the Audion, leading Fleming to accuse him of infringing his patents. De Forest's tube developed into the triode the first electronic amplifier. The triode was vital in the creation of long-distance telephone and radio ...
NUC initially operated as a supervisory body in the development of university education in Nigeria. At inception, NUC was created by executive action and was initially placed under the Cabinet's Office. [6] The pioneer chairman was the Emir of Yauri, Alhaji Tukur who was succeeded by Rotimi Williams.
Phonofilm is an optical sound-on-film system developed by inventors Lee de Forest and Theodore Case in the early 1920s. In 1919 and 1920, de Forest, inventor of the audion tube, filed his first patents on a sound-on-film process, DeForest Phonofilm, which recorded sound directly onto film as parallel lines. These parallel lines photographically ...
Although Lee de Forest initially discounted Armstrong's findings, beginning in 1915 de Forest filed a series of competing patent applications that largely copied Armstrong's claims, now stating that he had discovered regeneration first, based on a notebook entry made on August 6, 1912, while working for the Federal Telegraph company, prior to ...
He served briefly as the vice chancellor of the University in 1982. [1] Alagoa was a visiting scholar at Frobenius Institute in 1989, a Bellagio Study and Conference Center resident scholar in 1990; and a Brown University research scholar from 1993 to 1994. [1] He was made the pro-chancellor of Niger Delta University in 2001. [1]
The film focused primarily [5] on the three pioneers [6] of radio in America: Lee de Forest, Edwin Howard Armstrong, and David Sarnoff. [7] The program interspersed audio and musical highlights of "old time" radio with the stories, achievements, failures, scams and bitter feuds between each of the main protagonists. [8]
Apart from his contributions to science, he was notable for political activism and wrote many articles for the Daily Worker. Gordon Hammes (b. 1934). American biochemist at Cornell and Duke University, noted for work on enzyme mechanisms and kinetics. Member Natl. Acad. Sci. USA. Philip Handler (1917–1981). American nutritionist and ...