radio Archives - MultiMedia

Communications satellites

Nicolae Sfetcu — Wed, 03 Nov 2010 02:02:12 +0000

U.S. military WGSS communications satellite A communications satellite (sometimes abbreviated to comsat) is an artificial satellite stationed in space for the purposes of telecommunications using radio at microwave frequencies. Most communications satellites use geosynchronous orbits or near-geostationary orbits, although some … Read More

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Invention and history of radio

Nicolae Sfetcu — Sat, 10 Apr 2010 19:21:17 +0000

Tesla demonstrating wireless transmissions during his high frequency and potential lecture of 1891. After continued research, Tesla presented the fundamentals of radio in 1893. The identity of the original inventor of radio, at the time called wireless telegraphy, is contentious. … Read More

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Definition of the telecommunication

Nicolae Sfetcu — Thu, 22 Oct 2009 17:36:41 +0000

Telecommunication is the extension of communication over a distance. In practice it also recognizes that something may be lost in the process; hence the term ‘telecommunication’ covers all forms of distance and/or conversion of the original communications, including radio, telegraphy, … Read More

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Radio

Nicolae Sfetcu — Tue, 23 Jun 2009 23:11:44 +0000

Radio is a technology that allows for the transmission of signals by modulation of electromagnetic waves. These waves travel (propagate) through the air and the vacuum of space equally well, not requiring a medium of transport. A radio wave is … Read More

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Telegraphy

Nicolae Sfetcu — Mon, 11 May 2009 00:47:22 +0000

Telegraphy is the long distance transmission of written messages without physical transport of letters. This definition includes recent forms of data transmission such as fax, email, and computer networks in general. (A telegraph is a machine for transmitting and receiving … Read More

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Advertising media

Nicolae Sfetcu — Wed, 11 Mar 2009 15:06:56 +0000

Paying people to hold signs is one of the oldest forms of advertising, as with this Human directional pictured above Commercial advertising media can include wall paintings, billboards (outdoor advertising), street furniture components, printed flyers, radio, cinema and television … Read More

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