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  2. Fast low angle shot magnetic resonance imaging - Wikipedia

    en.wikipedia.org/wiki/Fast_low_angle_shot...

    The generic FLASH technique emerges as a gradient echo sequence which combines a low-flip angle radio-frequency excitation of the NMR signal (recorded as a spatially encoded gradient echo) with a rapid repetition of the basic sequence. The repetition time is usually much shorter than the typical T1 relaxation time of the protons in biologic ...

  3. Leitner system - Wikipedia

    en.wikipedia.org/wiki/Leitner_system

    The Leitner system [1] [2] [3] is a widely used method of efficiently using flashcards that was proposed by the German science journalist Sebastian Leitner in 1972. [ 4 ] [ 5 ] It is a simple implementation of the principle of spaced repetition , where cards are reviewed at increasing intervals.

  4. File:US Army Airborne and Ranger Training Bde Flash.svg

    en.wikipedia.org/wiki/File:US_Army_Airborne_and...

    This work has been released into the public domain by its author, McChizzle.This applies worldwide. In some countries this may not be legally possible; if so: McChizzle grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

  5. Flashcard - Wikipedia

    en.wikipedia.org/wiki/Flashcard

    A flashcard or flash card is a card bearing information on both sides, usually intended to practice and/or aid memorization. It can be virtual (part of a flashcard software ) or physical. Typically, each flashcard bears a question or definition on one side and an answer or target term on the other.

  6. The AOL.com video experience serves up the best video content from AOL and around the web, curating informative and entertaining snackable videos.

  7. Aircraft recognition - Wikipedia

    en.wikipedia.org/wiki/Aircraft_recognition

    Aircraft recognition generally depends on learning the external appearance of the aircraft, both friendly and hostile, most likely to be encountered. Techniques used to teach this information have included scale models, printed silhouette charts, slide projectors, computer aided instruction and even specially-printed playing cards.

  8. Guide number - Wikipedia

    en.wikipedia.org/wiki/Guide_number

    Here is a step-by-step example of using this formula: Suppose a filter attenuates by 1 1 / 3 f‑stops and the flash device is set to ISO 100. Take 2 and raise it to the power of 1.3333 (using the x y {\displaystyle x^{y}} button on a scientific calculator), which is approximately 2.5198, and then multiply that by 100, which equals about 252.

  9. List of flashcard software - Wikipedia

    en.wikipedia.org/wiki/List_of_flashcard_software

    Free-of-charge version available Spaced repetition Number of sides Supports Unicode Supports image Supports audio Other formats Printable Import-export Supports sync Plugin support Working offline Anki: AGPLv3 (personal computer, Android), proprietary Yes (except iOS) Yes Multiple Yes Yes Yes Video, LaTeX, HTML: Plugin [1] Yes Yes Yes Yes