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  2. Scientific notation - Wikipedia

    en.wikipedia.org/wiki/Scientific_notation

    Any real number can be written in the form m × 10 ^ n in many ways: for example, 350 can be written as 3.5 × 10 2 or 35 × 10 1 or 350 × 10 0. In normalized scientific notation (called "standard form" in the United Kingdom), the exponent n is chosen so that the absolute value of m remains at least one but less than ten (1 ≤ | m | < 10).

  3. Sample size determination - Wikipedia

    en.wikipedia.org/wiki/Sample_size_determination

    The table shown on the right can be used in a two-sample t-test to estimate the sample sizes of an experimental group and a control group that are of equal size, that is, the total number of individuals in the trial is twice that of the number given, and the desired significance level is 0.05. [4]

  4. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    The first American-made pocket-sized calculator, the Bowmar 901B (popularly termed The Bowmar Brain), measuring 5.2 by 3.0 by 1.5 inches (132 mm × 76 mm × 38 mm), came out in the Autumn of 1971, with four functions and an eight-digit red LED display, for US$240, while in August 1972 the four-function Sinclair Executive became the first ...

  5. Check digit - Wikipedia

    en.wikipedia.org/wiki/Check_digit

    The digit the farthest to the right (which is multiplied by 1) is the check digit, chosen to make the sum correct. It may need to have the value 10, which is represented as the letter X. For example, take the ISBN 0-201-53082-1: The sum of products is 0×10 + 2×9 + 0×8 + 1×7 + 5×6 + 3×5 + 0×4 + 8×3 + 2×2 + 1×1 = 99 ≡ 0 (mod 11). So ...

  6. List of acronyms: A - Wikipedia

    en.wikipedia.org/wiki/List_of_acronyms:_A

    A2ATD or A 2 ATD – (i) Anti-Armour Advanced Technology Demonstration; A2C2 or A 2 C 2 – (i) Army Airspace Command and Control; A3 – many, including a European larger than standard office paper size; A4 – many, including a European standard office paper size; see entry; A10 – (i) Atlantic 10 Conferencee

  7. James R. Biard - Wikipedia

    en.wikipedia.org/wiki/James_R._Biard

    James Robert Biard (May 20, 1931 – September 23, 2022) was an American electrical engineer and inventor who held 73 U.S. patents.Some of his more significant patents include the first infrared light-emitting diode (LED), [1] the optical isolator, [2] Schottky clamped logic circuits, [3] silicon Metal Oxide Semiconductor Read Only Memory (MOS ROM), [4] a low bulk leakage current avalanche ...

  8. WOMAC - Wikipedia

    en.wikipedia.org/wiki/WOMAC

    The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) is a widely used, proprietary set of standardized questionnaires used by health professionals to evaluate the condition of patients with osteoarthritis of the knee and hip, including pain, stiffness, and physical functioning of the joints.