• Thumbnail for Signal
    multiple subject fields including signal processing, information theory and biology. In signal processing, a signal is a function that conveys information...
    30 KB (3,578 words) - 13:29, 18 July 2025
  • The Signal may refer to: The Signal (2007 American film), a horror film written and directed by David Bruckner, Dan Bush, and Jacob Gentry The Signal (2007...
    1 KB (192 words) - 22:22, 5 October 2024
  • Signal Mountain may refer to: Signal Mountain (geography), several mountains or peaks named Signal Signal Mountain (Alberta), a mountain in the Maligne...
    867 bytes (138 words) - 21:11, 26 October 2024
  • busy signal Listen to a busy signal from North America, Hong Kong, South Korea and the Philippines. Example of an old North American busy signal Listen...
    7 KB (945 words) - 05:49, 9 March 2025
  • Thumbnail for Wow! signal
    The Wow! signal was a strong narrowband radio signal detected on August 15, 1977, by Ohio State University's Big Ear radio telescope in the United States...
    33 KB (3,399 words) - 10:56, 20 July 2025
  • Signal or signaling may refer to: Analog signal Audio signal Digital signal Digital signal (signal processing) Cell signaling, in biology Signalling (economics)...
    5 KB (624 words) - 19:42, 7 May 2025
  • Thumbnail for Signal (software)
    Signal is an open-source, encrypted messaging service for instant messaging, voice calls, and video calls. The instant messaging function includes sending...
    140 KB (12,083 words) - 00:07, 23 July 2025
  • Hong Kong tropical cyclone warning signals are issued by the Hong Kong Observatory to warn of a potential threat or effects of a tropical cyclone in the...
    23 KB (1,970 words) - 13:30, 22 July 2025
  • A forex signal is a suggestion for entering a trade on a currency pair, usually at a specific price and time. The signal is generated either by a human...
    4 KB (409 words) - 21:29, 1 December 2024
  • Signals are standardized messages sent to a running program to trigger specific behavior, such as quitting or error handling. They are a limited form...
    31 KB (3,432 words) - 00:48, 4 May 2025
  • An analog signal (American English) or analogue signal (British and Commonwealth English) is any signal, typically a continuous-time signal, representing...
    6 KB (642 words) - 17:51, 18 June 2025
  • Thumbnail for Signals intelligence
    Signals intelligence (SIGINT) is the act and field of intelligence-gathering by interception of signals, whether communications between people (communications...
    54 KB (6,790 words) - 18:14, 21 July 2025
  • Thumbnail for Signal processing
    Signal processing is an electrical engineering subfield that focuses on analyzing, modifying and synthesizing signals, such as sound, images, potential...
    23 KB (2,270 words) - 00:53, 24 July 2025
  • The Signal Technology Foundation, commonly known as the Signal Foundation, is an American non-profit organization founded in 2018 by Moxie Marlinspike...
    14 KB (753 words) - 00:04, 11 May 2025
  • Thumbnail for Smoke signal
    The smoke signal is one of the oldest forms of long-distance communication. It is a form of visual communication used over a long distance. In general...
    12 KB (1,432 words) - 08:42, 15 July 2025
  • Thumbnail for Signal-to-noise ratio
    Signal-to-noise ratio (SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background...
    25 KB (3,695 words) - 15:38, 25 July 2025
  • modulation or message signal onto a carrier signal to be transmitted. For example, the message signal might be an audio signal representing sound from...
    28 KB (3,371 words) - 18:22, 31 July 2025
  • Thumbnail for Signal transmission
    as "TX") is the process of sending or propagating an analog or digital signal via a medium that is wired, wireless, or fiber-optic. Transmission system...
    2 KB (131 words) - 07:22, 21 September 2024
  • Thumbnail for Signal for Help
    The Signal for Help (or the Violence at Home Signal for Help) is a single-handed gesture that can be used over a video call or in person by an individual...
    6 KB (557 words) - 20:57, 27 July 2025
  • Thumbnail for Digital signal
    A digital signal is a signal that represents data as a sequence of discrete values; at any given time it can only take on, at most, one of a finite number...
    14 KB (1,567 words) - 08:14, 21 June 2025
  • A distress signal, also known as a distress call, is an internationally recognized means for obtaining help. Distress signals are communicated by transmitting...
    18 KB (2,182 words) - 22:47, 4 July 2025
  • Thumbnail for Signal transduction
    Signal transduction is the process by which a chemical or physical signal is transmitted through a cell as a series of molecular events. Proteins responsible...
    62 KB (7,645 words) - 05:36, 2 June 2025
  • Thumbnail for Signal Protocol
    The Signal Protocol (formerly known as the TextSecure Protocol) is a non-federated cryptographic protocol that provides end-to-end encryption for voice...
    35 KB (3,055 words) - 19:21, 10 July 2025
  • Thumbnail for Thumb signal
    A thumb signal, usually described as a thumbs-up or thumbs-down, is a common hand gesture achieved by a closed fist held with the thumb extended upward...
    19 KB (2,171 words) - 21:08, 14 July 2025
  • Thumbnail for Cell signaling
    signaling (cell signalling in British English) is the process by which a cell interacts with itself, other cells, and the environment. Cell signaling...
    61 KB (6,651 words) - 14:02, 27 May 2025
  • A signal peptide (sometimes referred to as signal sequence, targeting signal, localization signal, localization sequence, transit peptide, leader sequence...
    15 KB (1,777 words) - 07:49, 20 May 2025
  • Signal Hill may refer to: Signal Hill, Calgary, neighborhood and hill in Calgary, Alberta Signal Hill-Quidi Vidi, provincial electoral district for the...
    2 KB (252 words) - 06:28, 21 December 2021
  • Thumbnail for Sampling (signal processing)
    In signal processing, sampling is the reduction of a continuous-time signal to a discrete-time signal. A common example is the conversion of a sound wave...
    31 KB (3,139 words) - 11:47, 27 June 2025
  • The Bat-Signal is a distress signal device appearing in American comic books published by DC Comics, as a means to summon the superhero Batman. It is...
    29 KB (4,049 words) - 18:48, 27 July 2025
  • Look up signal-to-noise ratio in Wiktionary, the free dictionary. Signal to Noise may refer to: Signal-to-noise ratio, a measure used in science and engineering...
    1 KB (222 words) - 04:42, 22 July 2025