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Há 3 dias · Dr. Lee de Forest, a distinguished electrical engineer and the foremost American contrib-utor to the development of wireless telegraphy and telephony is at the head, as president and...
Há 2 dias · About Forrest Li. Stanford grad Forrest Li founded and runs online gaming and e-commerce firm Sea, which also has interests in e-payments and financial services. Li entered the ranks of...
Há 5 dias · En 1907, Lee de Forest, chercheur américain, invente la triode. C'est un dispositif sous vide comprenant un filament émetteur d'électrons et une plaque, collectrice d'électrons lorsqu'elle est polarisée positivement ; entre les deux, on insère une grille.
Há 2 dias · Swanson appeared in a 1925 short produced by Lee de Forest in his Phonofilm sound-on-film process. She made a number of films for Paramount, including The Coast of Folly (1925), Stage Struck (1925) and The Untamed Lady (1926).
Há 6 horas · BANGOR, Maine (WABI) - Filmmakers Lee Ann and Thomas Mark Szelog have made a film, “A Peace of Forest.” It’s a documentary set in the wild of Maine. “Within 70 acres of Maine forest lies a ...
Há 3 dias · The ENVELOPE GENERATOR offers modulations in an uncommonly wide range of frequencies — starting as low as 0.05 hz for slowly evolving 20 second long cycles, and reaching up to (and past) the audio threshold at 300 hz for a wave shaping effect similar to sounds found on west coast style synthesizers (“think Buchla”).
Há 6 horas · STATESVILLE — The NC Grange has awarded 27 grants to landowners, county agencies and conservation nonprofits to assist in protecting farm and forest lands across the state.
