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Phreaking is a slang term coined to describe the activity of a culture of people who study, experiment with, or explore telecommunication systems, such as equipment and systems connected to public telephone networks. [1] The term phreak is a sensational spelling of the word freak with the ph- from phone, and may also refer to the use of various ...
The original Blue Screen of Death (here seen in the Italian edition of Windows NT 3.51) first appeared in Windows NT 3.1. The first Blue Screen of Death appeared in Windows NT 3.1 [5] (the first version of the Windows NT family, released in 1993), and later appeared on all Windows operating systems released afterwards.
The main cause of ringing artifacts is due to a signal being bandlimited (specifically, not having high frequencies) or passed through a low-pass filter; this is the frequency domain description. In terms of the time domain, the cause of this type of ringing is the ripples in the sinc function, [1] which is the impulse response (time domain ...
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When used for plain old telephone service (POTS), the first wire is known as the tip or A-leg (U.K.) conductor, and is usually connected to the positive side of a direct current (DC) circuit, while the second wire is known as the ring lead or B-leg (U.K.), and is connected to the negative side of the circuit. Neither of these two sides of the ...
The black box (as distinguished from blue boxes and red boxes) was a small electronic circuit, usually a resistor or zener diode in series with the line. It relied on (now-obsolete) telephone exchanges controlled by mechanical relays. These exchanges used a relay to detect a drop in line voltage (usually to less than -10V off-hook, compared to ...
Original image, with good text edges and color grade. Loss of edge clarity and tone "fuzziness" in heavy JPEG compression. A compression artifact (or artefact) is a noticeable distortion of media (including images, audio, and video) caused by the application of lossy compression. Lossy data compression involves discarding some of the media's ...