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In general, detection is the action of accessing information without specific cooperation from with the sender. In the history of radio communications, the term "detector" was first used for a device that detected the simple presence or absence of a radio signal, since all communications were in Morse code.
It was a 4-coil induction balance for detecting submerged metallic torpedoes and iron ships and the like. [8] Given the development time involved this may have been the earliest known device specifically constructed as a metal detector using magnetic induction.
The Alpha 6 is a fake "molecular detector" which, according to its manufacturer, can detect various substances from a distance, including explosives and drugs. The device has come under scrutiny following revelations about two similar devices, the ADE 651, which has become the focus of a fraud investigation in the United Kingdom, [1] and the GT200, which tests have determined to perform no ...
The name of the detector is a pun [3] which was bestowed upon it by Fred Reines, one of the scientists working on the project.The name is derived from the Hindi word "bhang", a locally grown variety of cannabis which is smoked or drunk to induce intoxicating effects, the joke being that one would have to be on drugs to believe the bhangmeter detectors would work properly.
The device that performed this function in the receiver circuit was called a detector. [1] A variety of different detector devices, such as the coherer , electrolytic detector , magnetic detector and the crystal detector , were used during the wireless telegraphy era until superseded by vacuum tube technology.
The same image viewed by white, blue, green, and red lights reveals different hidden numbers. Steganography (/ ˌ s t ɛ ɡ ə ˈ n ɒ ɡ r ə f i / ⓘ STEG-ə-NOG-rə-fee) is the practice of representing information within another message or physical object, in such a manner that the presence of the concealed information would not be evident to an unsuspecting person's examination.
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The player must rotate their device to read certain lines of text as they navigate through the game world. Device 6 uses mainly text in its gameplay, and the player swipes the screen to move through or review the story. [4] The text may turn or split into branches in certain points of the game, adapting to the protagonist's movements in the ...