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  2. Solar azimuth angle - Wikipedia

    en.wikipedia.org/wiki/Solar_azimuth_angle

    An Excel workbook with VBA functions for solar azimuth, solar elevation, dawn, sunrise, solar noon, sunset, and dusk, by Greg Pelletier, translated from NOAA's online calculators for solar position and sunrise/sunset; An Excel workbook with a solar position and solar radiation time-series calculator, by Greg Pelletier; Sun Position Calculator ...

  3. Z-order curve - Wikipedia

    en.wikipedia.org/wiki/Z-order_curve

    The Z-ordering can be used to efficiently build a quadtree (2D) or octree (3D) for a set of points. [4] [5] The basic idea is to sort the input set according to Z-order.Once sorted, the points can either be stored in a binary search tree and used directly, which is called a linear quadtree, [6] or they can be used to build a pointer based quadtree.

  4. Williams–Landel–Ferry equation - Wikipedia

    en.wikipedia.org/wiki/Williams–Landel–Ferry...

    While the time span of a TTSP master curve is broad, according to Struik, [4] it is valid only if the data sets did not suffer from ageing effects during the test time. Even then, the master curve represents a hypothetical material that does not age. Effective Time Theory. [4] needs to be used to obtain useful prediction for long term time. [5]

  5. Sunrise equation - Wikipedia

    en.wikipedia.org/wiki/Sunrise_equation

    C is the Equation of the center value needed to calculate lambda (see next equation). 1.9148 is the coefficient of the Equation of the Center for the planet the observer is on (in this case, Earth) Ecliptic longitude

  6. Tautochrone curve - Wikipedia

    en.wikipedia.org/wiki/Tautochrone_curve

    A tautochrone curve or isochrone curve (from Ancient Greek ταὐτό 'same' ἴσος 'equal' and χρόνος 'time') is the curve for which the time taken by an object sliding without friction in uniform gravity to its lowest point is independent of its starting point on the curve.

  7. Curve fitting - Wikipedia

    en.wikipedia.org/wiki/Curve_fitting

    Curve fitting [1] [2] is the process of constructing a curve, or mathematical function, that has the best fit to a series of data points, [3] possibly subject to constraints. [ 4 ] [ 5 ] Curve fitting can involve either interpolation , [ 6 ] [ 7 ] where an exact fit to the data is required, or smoothing , [ 8 ] [ 9 ] in which a "smooth ...

  8. 6 tips to reduce alcohol use and cancer risk after surgeon ...

    www.aol.com/6-tips-reduce-alcohol-cancer...

    U.S. Surgeon General Dr. Vivek Murthy warned in a recent advisory about alcohol use increasing cancer risk. The advisory notes that alcohol can increase the risk of throat, liver, esophageal ...

  9. Dead reckoning - Wikipedia

    en.wikipedia.org/wiki/Dead_reckoning

    A is the last known position (fix), B is the position calculated by dead reckoning, and C is the true position after the time interval. The vector from A to B is the expected path for plane based on the initial heading (HDG) and true airspeed (TAS).

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