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The spark gap is inside the box with the transparent cover at top center. A spark-gap transmitter is an obsolete type of radio transmitter which generates radio waves by means of an electric spark. [ 1][ 2] Spark-gap transmitters were the first type of radio transmitter, and were the main type used during the wireless telegraphy or "spark" era ...
From today's featured article. Hudson Volcano is a volcano in the rugged mountains of southern Chile. Lying in the Southern Volcanic Zone of the Andes, it was formed by the subduction of the oceanic Nazca Plate under the continental South American Plate. Hudson has the form of a 10-kilometre-wide (6-mile) volcanic caldera filled with ice.
Google Wave, later known as Apache Wave, was a software framework for real-time collaborative online editing. Originally developed by Google and announced on May 28, 2009, [ 1 ] [ 2 ] [ 3 ] it was renamed to Apache Wave when the project was adopted by the Apache Software Foundation as an incubator project in 2010.
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Specific Area Message Encoding (SAME) is a protocol used for framing and classification of broadcasting emergency warning messages. It was developed by the United States National Weather Service for use on its NOAA Weather Radio (NWR) network, and was later adopted by the Federal Communications Commission for the Emergency Alert System, then subsequently by Environment Canada for use on its ...
A classic example of instant messaging on a desktop computer: the left window of this software showing a list of contacts ("buddy list") and the right window an active IM conversation An example of instant messaging on mobile, featuring the exchange of pictures and audio on top of text. Instant messaging (IM) technology is a type of synchronous ...
Scientists have reconstructed Pink Floyd’s “Another Brick in the Wall” through recordings of epilepsy surgery patients’ brainwaves as they listened to the song. It is the first time a ...
Audacity (audio editor) Audacity is a free and open-source digital audio editor and recording application software, available for Windows, macOS, Linux, and other Unix-like operating systems. [ 4][ 5] As of December 6, 2022, Audacity is the most popular download at FossHub, [ 8] with over 114.2 million downloads since March 2015.