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  2. Phenomena (film) - Wikipedia

    en.wikipedia.org/wiki/Phenomena_(film)

    Phenomena was released theatrically in Italy on 31 January 1985 with a 116-minute running time. [24] This version of Phenomena is often referred to as the "integral cut". [24] A shorter version of the film was prepared for international release that had a 110-minute running time. [24]

  3. CW complex - Wikipedia

    en.wikipedia.org/wiki/CW_complex

    In mathematics, and specifically in topology, a CW complex (also cellular complex or cell complex) is a topological space that is built by gluing together topological balls (so-called cells) of different dimensions in specific ways.

  4. One-loop Feynman diagram - Wikipedia

    en.wikipedia.org/wiki/One-loop_Feynman_diagram

    One-loop diagrams are usually computed as the integral over one independent momentum that can "run in the cycle". The Casimir effect , Hawking radiation and Lamb shift are examples of phenomena whose existence can be implied using one-loop Feynman diagrams, especially the well-known "triangle diagram":

  5. Hayflick limit - Wikipedia

    en.wikipedia.org/wiki/Hayflick_limit

    The Hayflick limit, or Hayflick phenomenon, is the number of times a normal somatic, differentiated human cell population will divide before cell division stops. [ 1 ] [ 2 ] The concept of the Hayflick limit was advanced by American anatomist Leonard Hayflick in 1961, [ 3 ] at the Wistar Institute in Philadelphia , Pennsylvania.

  6. Homology (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Homology_(mathematics)

    Cycles can be joined or added together, as a and b on the torus were when it was cut open and flattened down. In the Klein bottle diagram, a goes round one way and −a goes round the opposite way. If a is thought of as a cut, then −a can be thought of as a gluing operation. Making a cut and then re-gluing it does not change the surface, so a ...

  7. Fresnel integral - Wikipedia

    en.wikipedia.org/wiki/Fresnel_integral

    The sector contour used to calculate the limits of the Fresnel integrals. This can be derived with any one of several methods. One of them [5] uses a contour integral of the function around the boundary of the sector-shaped region in the complex plane formed by the positive x-axis, the bisector of the first quadrant y = x with x ≥ 0, and a circular arc of radius R centered at the origin.

  8. Outline of cell biology - Wikipedia

    en.wikipedia.org/wiki/Outline_of_cell_biology

    Light micrograph of a moss's leaf cells at 400X magnification. The following outline is provided as an overview of and topical guide to cell biology: . Cell biology – A branch of biology that includes study of cells regarding their physiological properties, structure, and function; the organelles they contain; interactions with their environment; and their life cycle, division, and death.

  9. Coulomb collision - Wikipedia

    en.wikipedia.org/wiki/Coulomb_collision

    The integral of / thus yields the logarithm of the ratio of the upper and lower cut-offs. This number is known as the Coulomb logarithm and is designated by either ⁡ or .It is the factor by which small-angle collisions are more effective than large-angle collisions.