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  2. Tortuosity - Wikipedia

    en.wikipedia.org/wiki/Tortuosity

    Dividing the result by length of curve or chord has also been tried. In 2002 several Italian scientists [4] proposed one more method. At first, the curve is divided into several (N) parts with constant sign of curvature (using hysteresis to decrease sensitivity to noise). Then the arc-chord ratio for each part is found and the tortuosity is ...

  3. Parametrization (geometry) - Wikipedia

    en.wikipedia.org/wiki/Parametrization_(geometry)

    Such a parametric equation completely determines the curve, without the need of any interpretation of t as time, and is thus called a parametric equation of the curve (this is sometimes abbreviated by saying that one has a parametric curve). One similarly gets the parametric equation of a surface by considering functions of two parameters t and u.

  4. Atmospheric model - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_model

    The horizontal domain of a model is either global, covering the entire Earth (or other planetary body), or regional (limited-area), covering only part of the Earth. Atmospheric models also differ in how they compute vertical fluid motions; some types of models are thermotropic, [ 1 ] barotropic , hydrostatic , and non-hydrostatic.

  5. Köhler theory - Wikipedia

    en.wikipedia.org/wiki/Köhler_theory

    The Köhler curve is the visual representation of the Köhler equation. It shows the saturation ratio S {\displaystyle S} – or the supersaturation s = ( S − 1 ) ⋅ 100 % {\displaystyle s=\left(S-1\right)\cdot 100\%} – at which the droplet is in equilibrium with the environment over a range of droplet diameters.

  6. Curved space - Wikipedia

    en.wikipedia.org/wiki/Curved_space

    The surface of a sphere can be completely described by two dimensions, since no matter how rough the surface may appear to be, it is still only a surface, which is the two-dimensional outside border of a volume. Even the surface of the Earth, which is fractal in complexity, is still only a two-dimensional boundary along the outside of a volume. [3]

  7. Orbit modeling - Wikipedia

    en.wikipedia.org/wiki/Orbit_modeling

    Orbit modeling is the process of creating mathematical models to simulate motion of a massive body as it moves in orbit around another massive body due to gravity.Other forces such as gravitational attraction from tertiary bodies, air resistance, solar pressure, or thrust from a propulsion system are typically modeled as secondary effects.

  8. Simpson's rules (ship stability) - Wikipedia

    en.wikipedia.org/wiki/Simpson's_rules_(ship...

    Simpson's rules are used to calculate the volume of lifeboats, [6] and by surveyors to calculate the volume of sludge in a ship's oil tanks. For instance, in the latter, Simpson's 3rd rule is used to find the volume between two co-ordinates. To calculate the entire area / volume, Simpson's first rule is used. [7]

  9. Radius of curvature - Wikipedia

    en.wikipedia.org/wiki/Radius_of_curvature

    For the use in differential geometry, see Cesàro equation. For the radius of curvature of the Earth (approximated by an oblate ellipsoid); see also: arc measurement; Radius of curvature is also used in a three part equation for bending of beams. Radius of curvature (optics) Thin films technologies; Printed electronics; Minimum railway curve ...

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