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  2. Duty cycle - Wikipedia

    en.wikipedia.org/wiki/Duty_cycle

    A duty cycle or power cycle is the fraction of one period in which a signal or system is active. [1] [2] [3] Duty cycle is commonly expressed as a percentage or a ratio. A period is the time it takes for a signal to complete an on-and-off cycle. As a formula, a duty cycle (%) may be expressed as:

  3. Montgomery modular multiplication - Wikipedia

    en.wikipedia.org/wiki/Montgomery_modular...

    Therefore, reducing t into the desired range requires at most a single subtraction, so the algorithm's output lies in the correct range. To use REDC to compute the product of 7 and 15 modulo 17, first convert to Montgomery form and multiply as integers to get 12 as above. Then apply REDC with R = 100, N = 17, N′ = 47, and T = 12.

  4. Repeating decimal - Wikipedia

    en.wikipedia.org/wiki/Repeating_decimal

    Conversely the period of the repeating decimal of a fraction ⁠ c / d ⁠ will be (at most) the smallest number n such that 10 n − 1 is divisible by d. For example, the fraction ⁠ 2 / 7 ⁠ has d = 7, and the smallest k that makes 10 k − 1 divisible by 7 is k = 6, because 999999 = 7 × 142857. The period of the fraction ⁠ 2 / 7 ⁠ is ...

  5. Tariff - Wikipedia

    en.wikipedia.org/wiki/Tariff

    According to William J. Bernstein, most economic historians now believe that only a fraction of the GDP loss worldwide and in the U.S. resulted from tariff wars. Bernstein argued that the decline "could not have exceeded 1 or 2% of world GDP, a far cry from the 17% recorded during the Great Depression."

  6. Organosolv - Wikipedia

    en.wikipedia.org/wiki/Organosolv

    The organosolv fractionation of mountain-beetle-killed lodgepole pine has yielded 97% conversion to glucose. Pan et al. [ 9 ] recovered 79% of the lignin using conditions of 170 °C, 1.1% w/w H 2 SO 4 , 65% v/v ethanol for 60 minutes.

  7. Productivity-improving technologies - Wikipedia

    en.wikipedia.org/wiki/Productivity-improving...

    Productivity-improving technologies date back to antiquity, with rather slow progress until the late Middle Ages. Important examples of early to medieval European technology include the water wheel, the horse collar, the spinning wheel, the three-field system (after 1500 the four-field system—see crop rotation) and the blast furnace.

  8. Effective interest rate - Wikipedia

    en.wikipedia.org/wiki/Effective_interest_rate

    The effective interest rate is calculated as if compounded annually. The effective rate is calculated in the following way, where r is the effective annual rate, i the nominal rate, and n the number of compounding periods per year (for example, 12 for monthly compounding): [1]

  9. Human impact on the nitrogen cycle - Wikipedia

    en.wikipedia.org/wiki/Human_impact_on_the...

    Approximately 78% of Earth's atmosphere is N gas (N 2), which is an inert compound and biologically unavailable to most organisms.In order to be utilized in most biological processes, N 2 must be converted to reactive nitrogen (Nr), which includes inorganic reduced forms (NH 3 and NH 4 +), inorganic oxidized forms (NO, NO 2, HNO 3, N 2 O, and NO 3 −), and organic compounds (urea, amines, and ...

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