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  2. Prismatic compass - Wikipedia

    en.wikipedia.org/wiki/Prismatic_compass

    Compass surveying is a type of surveying in which the directions of surveying lines are determined with a magnetic compass, and the length of the surveying lines are measured with a tape or chain or laser range finder. [2] The compass is generally used to run a traverse line. The compass calculates bearings of lines with respect to magnetic needle.

  3. Šidák correction - Wikipedia

    en.wikipedia.org/wiki/Šidák_correction

    The Šidák correction is derived by assuming that the individual tests are independent. Let the significance threshold for each test be α 1 {\displaystyle \alpha _{1}} ; then the probability that at least one of the tests is significant under this threshold is (1 - the probability that none of them are significant).

  4. Prism (band) - Wikipedia

    en.wikipedia.org/wiki/Prism_(band)

    Prism (styled as PRiSM) is a Canadian rock band formed in Vancouver in 1977. They were originally active from 1977 to 1984 and have been active again from 1987 to present. Their classic line-up consisted of lead singer Ron Tabak, guitarist Lindsay Mitchell, keyboardist John Hall, bassist Allen Harlow and drummer Rocket Nor

  5. Cyclotropia - Wikipedia

    en.wikipedia.org/wiki/Cyclotropia

    Cyclotropia is a form of strabismus in which, compared to the correct positioning of the eyes, there is a torsion of one eye (or both) about the eye's visual axis. . Consequently, the visual fields of the two eyes appear tilted relative t

  6. Strabismus surgery - Wikipedia

    en.wikipedia.org/wiki/Strabismus_surgery

    The earliest successful strabismus surgery intervention is known to have been performed on 26 October 1839 by Johann Friedrich Dieffenbach on a 7-year-old esotropic child; a few earlier attempts had been performed in 1818 by William Gibson of Baltimore, a general surgeon and professor at the University of Maryland. [2]

  7. Welch's t-test - Wikipedia

    en.wikipedia.org/wiki/Welch's_t-test

    Student's t-test assumes that the sample means being compared for two populations are normally distributed, and that the populations have equal variances.Welch's t-test is designed for unequal population variances, but the assumption of normality is maintained. [1]

  8. Tipp-Ex - Wikipedia

    en.wikipedia.org/wiki/Tipp-Ex

    Tipp-Ex can often be written on after it has dried.. Tipp-Ex correction fluid is a white liquid. It is used for painting over mistakes in a piece of writing.A brush (which was later replaced by a foam applicator) is attached to the cap, so when the bottle is closed, the brush is immersed in the fluid.

  9. Nystagmus - Wikipedia

    en.wikipedia.org/wiki/Nystagmus

    Nystagmus as seen in a case of ocular albinism. The cause of pathological nystagmus may be congenital, idiopathic, or secondary to a pre-existing neurological disorder.It also may be induced temporarily by disorientation (such as on roller coaster rides or when a person has been spinning in circles) or by some drugs (alcohol, lidocaine, and other central nervous system depressants, inhalant ...