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  2. E6B - Wikipedia

    en.wikipedia.org/wiki/E6B

    These flight computers are used during flight planning (on the ground before takeoff) to aid in calculating fuel burn, wind correction, time en route, and other items. In the air, the flight computer can be used to calculate ground speed, estimated fuel burn and updated estimated time of arrival.

  3. Error correction code - Wikipedia

    en.wikipedia.org/wiki/Error_correction_code

    The cost is a fixed, higher forward channel bandwidth. The American mathematician Richard Hamming pioneered this field in the 1940s and invented the first error-correcting code in 1950: the Hamming (7,4) code .

  4. PRISM - Wikipedia

    en.wikipedia.org/wiki/PRISM

    PRISM is a code name for a program under which the ... found that the disclosure of PRISM could cost the U.S. economy between $21.5 and $35 billion in lost ...

  5. Prism dioptre - Wikipedia

    en.wikipedia.org/?title=Prism_dioptre&redirect=no

    To a related topic: This is a redirect to an article about a similar topic.. Redirects from related topics are different than redirects from related words, because a related topic is more likely to warrant a full and detailed description in the target article.

  6. Refractive error - Wikipedia

    en.wikipedia.org/wiki/Refractive_error

    Eyeglasses are the easiest and safest method of correction. [3] Contact lenses can provide a wider field of vision; however they are associated with a risk of infection. [3] Refractive surgery permanently changes the shape of the cornea. [3] The number of people globally with refractive errors has been estimated at one to two billion. [4]

  7. QT interval - Wikipedia

    en.wikipedia.org/wiki/QT_interval

    The QT interval is a measurement made on an electrocardiogram used to assess some of the electrical properties of the heart.It is calculated as the time from the start of the Q wave to the end of the T wave, and approximates to the time taken from when the cardiac ventricles start to contract to when they finish relaxing.

  8. Abbe–Koenig prism - Wikipedia

    en.wikipedia.org/wiki/Abbe–Koenig_prism

    The prism is also less bulky than the double Porro design. The prism is sometimes simply called a "roof prism", although this is ambiguous, because other roof prisms exist, such as the Amici and Schmidt–Pechan designs. A variant of the Abbe–Koenig prism replaces the "roof" section of the prism with a single mirror-coated reflecting surface.

  9. Bolometric correction - Wikipedia

    en.wikipedia.org/wiki/Bolometric_correction

    The bolometric correction scale is set by the absolute magnitude of the Sun and an adopted (arbitrary) absolute bolometric magnitude for the Sun.Hence, while the absolute magnitude of the Sun in different filters is a physical and not arbitrary quantity, the absolute bolometric magnitude of the Sun is arbitrary, and so the zero-point of the bolometric correction scale that follows from it.

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