Search results
Results from the WOW.Com Content Network
The year 1947 in science and technology involved some significant events, listed below. Anthropology ... The clavioline is invented by Constant Martin.
Help; Learn to edit; Community portal; Recent changes; Upload file; Special pages
John Bardeen, Walter Brattain and William Shockley invented the first working transistors at Bell Labs, the point-contact transistor in 1947. Shockley introduced the improved bipolar junction transistor in 1948, which entered production in the early 1950s and led to the first widespread use of transistors.
1947: Holography is invented by Dennis Gabor. 1947: Floyd Farris and J.B. Clark (Stanolind Oil and Gas Corporation) invents hydraulic fracturing technology. [486] 1947: The first transistor, a bipolar point-contact transistor, is invented by John Bardeen and Walter Brattain under the supervision of William Shockley at Bell Labs.
The original configuration of the North American Numbering Plan assigned eighty-six area codes in October 1947, one each to every numbering plan area. The territories of the United States , which included Alaska , and Hawaii, did not receive area codes at first, nor did the territories of Canada or Newfoundland and Labrador, which was a British ...
Instead, what Bardeen, Brattain, and Shockley invented in 1947 was the first point-contact transistor. [19] To acknowledge this accomplishment, Shockley, Bardeen and Brattain jointly received the 1956 Nobel Prize in Physics "for their researches on semiconductors and their discovery of the transistor effect".
In 1858 Dr. M. Sales Giron invented the first pressurized inhaler. Amphetamine was first synthesized in 1887 in Germany by Romanian chemist Lazăr Edeleanu who named it phenylisopropylamine ; [ 23 ] [ 24 ] [ 25 ] its stimulant effects remained unknown until 1927, when it was independently resynthesized by Gordon Alles and reported to have ...
ENIAC was shut down on November 9, 1946, for a refurbishment and a memory upgrade, and was transferred to Aberdeen Proving Ground, Maryland in 1947. There, on July 29, 1947, it was turned on and was in continuous operation until 11:45 p.m. on October 2, 1955, when it was retired in favor of the more efficient EDVAC and ORDVAC computers. [2]