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  2. Monoclinic crystal system - Wikipedia

    en.wikipedia.org/wiki/Monoclinic_crystal_system

    In crystallography, the monoclinic crystal system is one of the seven crystal systems. A crystal system is described by three vectors. In the monoclinic system, the crystal is described by vectors of unequal lengths, as in the orthorhombic system. They form a parallelogram prism. Hence two pairs of vectors are perpendicular (meet at right ...

  3. The Lord of the Rings (film series) - Wikipedia

    en.wikipedia.org/wiki/The_Lord_of_the_Rings...

    The Lord of the Rings is a trilogy of epic fantasy adventure films directed by Peter Jackson, based on the novel The Lord of the Rings by British author J. R. R. Tolkien. The films are subtitled The Fellowship of the Ring (2001), The Two Towers (2002), and The Return of the King (2003). Produced and distributed by New Line Cinema with the co ...

  4. Multiple comparisons problem - Wikipedia

    en.wikipedia.org/wiki/Multiple_comparisons_problem

    The problem of multiple comparisons received increased attention in the 1950s with the work of statisticians such as Tukey and Scheffé. Over the ensuing decades, many procedures were developed to address the problem. In 1996, the first international conference on multiple comparison procedures took place in Tel Aviv. [3]

  5. Refractive error - Wikipedia

    en.wikipedia.org/wiki/Refractive_error

    Eyeglasses are the easiest and safest method of correction. Contact lenses can provide a wider field of vision; however they are associated with a risk of infection. Refractive surgery permanently changes the shape of the cornea. The number of people globally with refractive errors has been estimated at one to two billion.

  6. Binoculars - Wikipedia

    en.wikipedia.org/wiki/Binoculars

    In roof prism designs, optically relevant prism angles must be correct within 2 arcseconds (1 / 1,800 of 1 degree) to avoid seeing an obstructive double image. Maintaining such tight production tolerances for the alignment of their optical elements by laser or interference (collimation) at an affordable price point is challenging.

  7. Error correction model - Wikipedia

    en.wikipedia.org/wiki/Error_correction_model

    If both are I(0), standard regression analysis will be valid. If they are integrated of a different order, e.g. one being I(1) and the other being I(0), one has to transform the model. If they are both integrated to the same order (commonly I(1)), we can estimate an ECM model of the form

  8. Triangular prism - Wikipedia

    en.wikipedia.org/wiki/Triangular_prism

    Triangular bipyramid. In geometry, a triangular prism or trigonal prism [1] is a prism with 2 triangular bases. If the edges pair with each triangle's vertex and if they are perpendicular to the base, it is a right triangular prism. A right triangular prism may be both semiregular and uniform . The triangular prism can be used in constructing ...

  9. Form follows function - Wikipedia

    en.wikipedia.org/wiki/Form_follows_function

    The Wainwright Building in St. Louis, Missouri, designed by Louis Sullivan and built in 1891, is emblematic of his famous maxim "form follows function".. Form follows function is a principle of design associated with late 19th- and early 20th-century architecture and industrial design in general, which states that the shape of a building or object should primarily relate to its intended ...