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  2. Directional statistics - Wikipedia

    en.wikipedia.org/wiki/Directional_statistics

    More generally, directional statistics deals with observations on compact Riemannian manifolds including the Stiefel manifold. The overall shape of a protein can be parameterized as a sequence of points on the unit sphere. Shown are two views of the spherical histogram of such points for a large collection of protein structures. The statistical ...

  3. Arrow of time - Wikipedia

    en.wikipedia.org/wiki/Arrow_of_time

    In the 1928 book The Nature of the Physical World, which helped to popularize the concept, Eddington stated: . Let us draw an arrow arbitrarily. If as we follow the arrow we find more and more of the random element in the state of the world, then the arrow is pointing towards the future; if the random element decreases the arrow points towards the past.

  4. Curvature - Wikipedia

    en.wikipedia.org/wiki/Curvature

    An intrinsic definition of the Gaussian curvature at a point P is the following: imagine an ant which is tied to P with a short thread of length r. It runs around P while the thread is completely stretched and measures the length C(r) of one complete trip around P. If the surface were flat, the ant would find C(r) = 2πr.

  5. Tension (physics) - Wikipedia

    en.wikipedia.org/wiki/Tension_(physics)

    Tension is the pulling or stretching force transmitted axially along an object such as a string, rope, chain, rod, truss member, or other object, so as to stretch or pull apart the object. In terms of force, it is the opposite of compression .

  6. Statics - Wikipedia

    en.wikipedia.org/wiki/Statics

    A force is either a push or a pull, and it tends to move a body in the direction of its action. The action of a force is characterized by its magnitude, by the direction of its action, and by its point of application (or point of contact). Thus, force is a vector quantity, because its effect depends on the direction as well as on the magnitude ...

  7. 3 Ways To Get on the Same Page About Money With Your ... - AOL

    www.aol.com/3-ways-same-page-money-160022883.html

    “Money and marriage can be a tension point, but it doesn’t have to be,” Cruze said. More From GOBankingRates. 7 Winter Clothing Items You Should Buy at Costco Now. 7 SUVs To Avoid Buying in 2025

  8. Linear trend estimation - Wikipedia

    en.wikipedia.org/wiki/Linear_trend_estimation

    Also, where the variations are significantly larger than the resulting straight line trend, the choice of start and end points can significantly change the result. That is, the model is mathematically misspecified. Statistical inferences (tests for the presence of a trend, confidence intervals for the trend, etc.) are invalid unless departures ...

  9. Republicans squeeze Democrats on labor as UAW strike explodes ...

    www.aol.com/news/republicans-look-turn-uaw...

    The GOP sees the UAW walkout as a potential lifeline in Michigan, where politically weakened Republicans are now plotting how best to seize on a tension point between Democrats’ clean-energy ...