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  2. Missing data - Wikipedia

    en.wikipedia.org/wiki/Missing_data

    Missing not at random (MNAR) (also known as nonignorable nonresponse) is data that is neither MAR nor MCAR (i.e. the value of the variable that's missing is related to the reason it's missing). [5] To extend the previous example, this would occur if men failed to fill in a depression survey because of their level of depression.

  3. NaN - Wikipedia

    en.wikipedia.org/wiki/NaN

    In the IEEE 754 binary interchange formats, NaNs are encoded with the exponent field filled with ones (like infinity values), and some non-zero number in the trailing significand field (to make them distinct from infinity values); this allows the definition of multiple distinct NaN values, depending on which bits are set in the trailing ...

  4. CAPTCHA - Wikipedia

    en.wikipedia.org/wiki/Captcha

    This CAPTCHA (reCAPTCHA v1) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.A CAPTCHA (/ ˈ k æ p. tʃ ə / KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.

  5. NAND gate - Wikipedia

    en.wikipedia.org/wiki/NAND_gate

    The basic implementations can be understood from the image on the left below: If either of the switches S1 or S2 is open, the pull-up resistor R will set the output signal Q to 1 (high). If S1 and S2 are both closed, the pull-up resistor will be overridden by the switches, and the output will be 0 (low).

  6. Flood fill - Wikipedia

    en.wikipedia.org/wiki/Flood_fill

    Set n equal to the first element of Q. 5. Remove first element from Q. 6. If n is Inside: Set the n Add the node to the west of n to the end of Q. Add the node to the east of n to the end of Q. Add the node to the north of n to the end of Q. Add the node to the south of n to the end of Q. 7.

  7. Nan province - Wikipedia

    en.wikipedia.org/wiki/Nan_province

    Nan (Thai: น่าน, pronounced; Northern Thai: ᨶᩣ᩠᩵ᨶ) is one of Thailand's seventy-six provinces (changwat), and lies in upper northern Thailand. Neighboring provinces are (from south clockwise): Uttaradit , Phrae , and Phayao .

  8. O'Nan–Scott theorem - Wikipedia

    en.wikipedia.org/wiki/O'Nan–Scott_theorem

    S k × S n−k the stabilizer of a k-set (that is, intransitive) S a wr S b with n = ab, the stabilizer of a partition into b parts of size a (that is, imprimitive) primitive (that is, preserves no nontrivial partition) and of one of the following types: AGL(d,p) S l wr S k, the stabilizer of the product structure Ω = Δ k; a group of diagonal ...

  9. PHP - Wikipedia

    en.wikipedia.org/wiki/PHP

    PHP is commonly used as the P in this bundle alongside Linux, Apache and MySQL, although the P may also refer to Python, Perl, or some mix of the three. Similar packages, WAMP and MAMP, are also available for Windows and macOS, with the first letter standing for the respective operating system. Although both PHP and Apache are provided as part ...