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  2. Generation of primes - Wikipedia

    en.wikipedia.org/wiki/Generation_of_primes

    A prime sieve or prime number sieve is a fast type of algorithm for finding primes. There are many prime sieves. The simple sieve of Eratosthenes (250s BCE), the sieve of Sundaram (1934), the still faster but more complicated sieve of Atkin [1] (2003), and various wheel sieves [2] are most common.

  3. Low-density parity-check code - Wikipedia

    en.wikipedia.org/wiki/Low-density_parity-check_code

    LDPC codes functionally are defined by a sparse parity-check matrix. This sparse matrix is often randomly generated, subject to the sparsity constraints—LDPC code construction is discussed later. These codes were first designed by Robert Gallager in 1960. [5] Below is a graph fragment of an example LDPC code using Forney's factor graph notation.

  4. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_Code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

  5. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    Returned by version 1 of the Twitter Search and Trends API when the client is being rate limited; versions 1.1 and later use the 429 Too Many Requests response code instead. [33] The phrase "Enhance your calm" comes from the 1993 movie Demolition Man , and its association with this number is likely a reference to cannabis .

  6. Global Consciousness Project - Wikipedia

    en.wikipedia.org/wiki/Global_Consciousness_Project

    Roger D. Nelson developed the project as an extrapolation of two decades of experiments from the controversial Princeton Engineering Anomalies Research Lab (PEAR). [6]In an extension of the laboratory research utilizing hardware Random Event Generators (REG) [7] called FieldREG, investigators examined the outputs of REGs in the field before, during and after highly focused or coherent group ...

  7. 2004 Ukrainian child pornography raids - Wikipedia

    en.wikipedia.org/wiki/2004_Ukrainian_child...

    Operating predominantly in Kyiv with branches in cities like Kharkiv and Simferopol, the agency, named "Alex Model" (Ukrainian: Алекс-Модел), was identified as one of the major producers and distributors of child pornographic content, which was branded under several names throughout the world using the "LS" abbreviation as LS-Models, LS-Magazine, LS-Girls, LS-Studio, LS-Island, LS ...

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