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TODAY IN HISTORY
VACUUM TUBE
October 20, 1906 - American Institute, U.S.A.
October 20, 1906 - American Institute, U.S.A.
Dr. Lee DeForest (26 Aug 1873 - 30 Jun 1961), one of the “fathers of radio,'' announced his three-element electrical vacuum tube (now known as a triode) to a meeting of the American Institute of Electrical Engineers He had discovered that when a mesh, or grid, of wire was placed between the filament and collector “plate†in a diode tube (first made by J. Ambrose Fleming, 1904), a large voltage-amplifying effect could be produced. DeForest patented this vacuum tube on 15 Jan 1907. The ability of this tube to amplifiy weak signals was an invention as great as radio itself, because it made long-distance communication possible.
DIFFERENTIAL ANALYSER
October 20, 1927 - U.S.A.
October 20, 1927 - U.S.A.
A new electrical machine with a mechanical mind has been perfected at Massachusetts Institute of Technology / MIT by Professor Vannevar Bush which can solve problems to complex for human engineers. The Product a differential analyser allows the mathematician or engineer to feed in the equation and parts of the problem which cannot be solved by formal mathematics. The machine can take from 8 minutes to several hours to provide the answer which man alone can not solve today.
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RANDOM QUOTES
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The Revolution
by John Adams
"...The Revolution was effected before the War commenced. The Revolution was in the minds and hearts of the people; a change in their religious sentiments of their duties and obligations. This radical change in the principles, opinions, sentiments, and affections of the people, was the real American Revolution...."
by Earth Day, Thomas Alva Edison Inventor
"...Until a man duplicates a blade of grass, Nature can laugh at his so-called scientific knowledge. Remedies from chemicals will never stand in favorable comparison with the products of Nature, the living cell of a plant, the final result of the rays of the sun, the mother of all life...."
RANDOM FACTS
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Salary
about Steve Jobs
Steve Jobs' annual salary was $1, just enough to keep company health benefits.
about Eyesight Myth and Fact
Myth: Staring at a computer screen all day is harmful to the eyes. Fact: Spending the day staring at a screen can tire or strain your eyes, but it will not hurt them. Make sure lighting doesn't create a glare on your screen. When spending long periods at your keyboard, take a break now and then to rest your eyes to reduce fatigue. Also, don't forget to blink. Your eyes need to stay lubricated to feel comfortable.
Italian :
Category Information : Italian
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La Toscana è una delle maggiori ed importanti regioni italiane per patrimonio storico, artistico, economico, culturale e paesaggistico. Per questo è una delle mete turistiche più apprezzat...
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Babbo natale immagini offre una vasta gamma di cartoline di Natale. È inoltre possibile trovare una grande scelta di foto, video e immagini di Natale.
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ll B&B Catania Globetrotter è ubicato nelcuore del centro storico della città nella parte orientale della Sicilia, accanto all’antico mercato del pesce (a piscaria) e a 300m dalla piaz...
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The Italian Society of Vascular EndoVascular Surgery - has been founded in Rome on 1997. Its aim is to facilitate and improve studies and researches in Vascular and Endovascular Surgery. To perform...
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Da Caff? Giannoni caff? Lavazza, Bialetti, Gimoka in cialde e capsule. Macchine da caff? Mokona, Lavazza Espresso Point e altre in vendita e comodato d'uso.
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Gigasweb ? una Web Agency con base a Roma specializzata in servizi di Web Marketing, Web Design e Search Engine Marketing. Web Communication a 360 gradi.
http://www.gigasweb.it
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