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  2. Mathematics of cyclic redundancy checks - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_cyclic...

    The exception to this result is a bit pattern the same as that of the generator polynomial. All uneven bit errors are detected by generator polynomials with even number of terms. 2-bit errors in a (multiple) distance of the longest bitfilter of even parity to a generator polynomial are not detected; all others are detected.

  3. Cyclic redundancy check - Wikipedia

    en.wikipedia.org/wiki/Cyclic_redundancy_check

    A cyclic redundancy check (CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to digital data. [1] [2] Blocks of data entering these systems get a short check value attached, based on the remainder of a polynomial division of their contents. On retrieval, the calculation is ...

  4. Random number generation - Wikipedia

    en.wikipedia.org/wiki/Random_number_generation

    Dice are an example of a mechanical hardware random number generator. When a cubical die is rolled, a random number from 1 to 6 is obtained. Random number generation is a process by which, often by means of a random number generator (RNG), a sequence of numbers or symbols is generated that cannot be reasonably predicted better than by random chance.

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    mail.aol.com

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  6. Synchronization (alternating current) - Wikipedia

    en.wikipedia.org/wiki/Synchronization...

    Sometimes as a precaution against out-of-step connection of a machine to a system, a "synchro check" relay is installed that prevents closing the generator circuit breaker unless the machine is within a few electrical degrees of being in-phase with the system. Synchro check relays are also applied in places where several sources of supply may ...

  7. Linear congruential generator - Wikipedia

    en.wikipedia.org/wiki/Linear_congruential_generator

    The second row is the same generator with a seed of 3, which produces a cycle of length 2. Using a = 4 and c = 1 (bottom row) gives a cycle length of 9 with any seed in [0, 8]. A linear congruential generator (LCG) is an algorithm that yields a sequence of pseudo-randomized numbers calculated with a discontinuous piecewise linear equation.

  8. Cash Generator - Wikipedia

    en.wikipedia.org/wiki/Cash_Generator

    Cash Generator was founded in 1994, by British businessman Brian Lewis. Having noticed the success of a similar business in the United States, he decided to emulate the business model in the United Kingdom, and opened his first store in Bolton, Greater Manchester on Valentine's Day 1994. [3]

  9. Self-checkout - Wikipedia

    en.wikipedia.org/wiki/Self-checkout

    In 2010, the open-source-self-check project was announced. By using hardware and open source software, this library self-checkout system costs less than one-tenth of the commercial version. [20] [21] A Java-based open source self check client for libraries, which has been used at the University of Oxford, [22] is also available under a GPL v3 ...