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t. e. In telecommunications, especially radio communication, spread spectrum are techniques by which a signal (e.g., an electrical, electromagnetic, or acoustic) generated with a particular bandwidth is deliberately spread in the frequency domain over a wider frequency band. Spread-spectrum techniques are used for the establishment of secure ...
Wings of Hope was founded by four businessmen from St. Louis, Missouri: William Edwards, Joseph Fabick (Fabick Tractor Company), Paul Rodgers (V.P., Ozark Air Lines), and George Haddaway. The four had heard of a young woman, Sister Michael Therese Ryan, who was the pilot of a small, fabric-covered Piper PA-18 Super Cub in the Turkana region of ...
Assurance Wireless USA, L.P. [1] is a telephone service subsidized by the federal Lifeline Assistance program, a government benefit program supported by the federal Universal Service Fund. The service provides to low-income eligible people a free phone, [ 2 ] [ 3 ] free monthly data, unlimited texting, and free monthly minutes.
The hope is that Apple’s offering improves on the current crop of over-the-counter (OTC) hearing aids. Since their approval by the FDA two years ago, OTC hearing aids have generated excitement ...
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Harold Thomas Cottam (27 January 1891 – 30 May 1984) was a British wireless operator on the RMS Carpathia who fortuitously happened to receive the distress call from the sinking RMS Titanic on 15 April 1912. [1][2] Cottam's decision to awaken Captain Arthur Henry Rostron and relay Titanic ' s message in spite of the scepticism of the officer ...
Ernst Walter Ruhmer (15 April 1878 – 8 April 1913) was a German physicist. He was best known for investigating practical applications making use of the light-sensitivity properties of selenium, which he employed in developing wireless telephony using line-of-sight optical transmissions, sound-on-film audio recording, and television transmissions over wires.
Wireless telegraphy or radiotelegraphy is the transmission of text messages by radio waves, analogous to electrical telegraphy using cables. [ 1 ][ 2 ] Before about 1910, the term wireless telegraphy was also used for other experimental technologies for transmitting telegraph signals without wires. [ 3 ][ 4 ] In radiotelegraphy, information is ...