instructions to set personal electronic devices including mobile phones, tablet pcs, and laptops to flight mode or turn them off. after planes land and leave the runway, crew members will notify passengers via broadcast of a time when devices can be used. if the communication function of a personal...
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terms. large buyers of traditional radio and new buyers coming from digital are driving this shift. radio should "follow the money". programmatic in the broadcastradio industry is happening on two fronts: the automation of the buying process (workflow) and the marketplace implications of buying and...
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the same time. many of the same components and much of the same basic technology applies to all three. the two-way type of radio network shares many of the same technologies and components as the broadcast-type radio network but is generally set up with fixed broadcast points ( transmitters ) with co-located...
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not required for electromagnetic waves to propagate, such waves are usually affected by the transmission media they pass through, for instance by absorption or by reflection or refraction at the interfaces between media. technical devices can therefore be employed to transmit or guide waves. thus, an...
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, was the first to develop workable radio communication. in italy, he sent and received his first radio signal in the year . lots of experiments were carried out with the radio, but it was in the early s that amateur radio operators invented single sideband and frequency modulation. in , regency introduced...