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  2. Shields formula - Wikipedia

    en.wikipedia.org/wiki/Shields_formula

    Question: What stone size is needed to defend this soil against a current of 2 m/s? This cannot be solved directly, first an assumption must be made for the d. Take a stone size of 5cm. That gives a Chézy value of 37. When this is entered in the Shields formula it gives a stone size of 5.7cm. The 5cm was a little too small.

  3. Kogge–Stone adder - Wikipedia

    en.wikipedia.org/wiki/Kogge–Stone_adder

    An example of a 4-bit Kogge–Stone adder is shown in the diagram. Each vertical stage produces a "propagate" and a "generate" bit, as shown. The culminating generate bits (the carries) are produced in the last stage (vertically), and these bits are XOR'd with the initial propagate after the input (the red boxes) to produce the sum bits. E.g., the first (least-significant) sum bit is ...

  4. EQUIL2 - Wikipedia

    en.wikipedia.org/wiki/EQUIL2

    Equil 2 is a computer program used to estimate the risk of nephrolithiasis (renal stones). The input data includes excretion, concentration, and the saturation of trace elements or other substances, which are involved in the creation of kidney stones and the output will be provided in terms of PSF score (probability of stone formation) or other equivalent formats.

  5. Hudson's equation - Wikipedia

    en.wikipedia.org/wiki/Hudson's_equation

    Hudson's equation, also known as Hudson formula, is an equation used by coastal engineers to calculate the minimum size of riprap (armourstone) required to provide satisfactory stability characteristics for rubble structures such as breakwaters under attack from storm wave conditions.

  6. HP-35 - Wikipedia

    en.wikipedia.org/wiki/HP-35

    The HP-35 was 5.8 inches (150 mm) long and 3.2 inches (81 mm) wide, said to have been designed to fit into one of William Hewlett's shirt pockets. Was the first scientific calculator to fly in space in 1973. [5] HP-35 calculators were carried on the Skylab 3 and Skylab 4 flights, between July 1973 and February 1974. [6]

  7. AOL Mail

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. Grain size - Wikipedia

    en.wikipedia.org/wiki/Grain_size

    Coarse gravel Pebble −3 to −4 8–16 mm 0.31–0.63 in Medium gravel Pebble ... 4 to 3 62.5–125 μm 0.0025–0.0049 in Very fine sand 8 to 4

  9. Stars and bars (combinatorics) - Wikipedia

    en.wikipedia.org/wiki/Stars_and_bars_(combinatorics)

    For any pair of positive integers n and k, the number of k-tuples of non-negative integers whose sum is n is equal to the number of multisets of size k − 1 taken from a set of size n + 1, or equivalently, the number of multisets of size n taken from a set of size k, and is given by

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