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  2. 1951 USAF resolution test chart - Wikipedia

    en.wikipedia.org/.../1951_USAF_resolution_test_chart

    A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.

  3. 24-hour clock - Wikipedia

    en.wikipedia.org/wiki/24-hour_clock

    24-hour digital clock in Miaoli HSR station. A public 24-hour clock in Curitiba, Brazil, with the hour hand on the outside and the minute hand on the inside.. A time of day is written in the 24-hour notation in the form hh:mm (for example 01:23) or hh:mm:ss (for example, 01:23:45), where hh (00 to 23) is the number of full hours that have passed since midnight, mm (00 to 59) is the number of ...

  4. Tire code - Wikipedia

    en.wikipedia.org/wiki/Tire_code

    When referring to the purely geometrical data, a shortened form of the full notation is used. To take a common example, 195/55R16 would mean that the nominal width of the tire is approximately 195 mm at the widest point, the height of the side-wall of the tire is 55% of the width (107 mm in this example) and that the tire fits 16-inch-diameter ...

  5. Alcohol by volume - Wikipedia

    en.wikipedia.org/wiki/Alcohol_by_volume

    In the United Kingdom, proof is 1.75 times the number (expressed as a percentage). [ 23 ] [ 20 ] For example, 40% alc/vol is 80 proof in the US and 70 proof in the UK. However, since 1980, alcohol proof in the UK has been replaced by alc/vol as a measure of alcohol content, avoiding confusion between the UK and US proof standards.

  6. National pipe thread - Wikipedia

    en.wikipedia.org/wiki/National_pipe_thread

    The standard for Nominal Pipe Size (often abbreviated NPS, which should not be confused with the abbreviation NPS for the straight thread form standard) is loosely related to the inside diameter of Schedule 40 series of sizes. Because of the pipe wall thickness of Schedule pipe, the actual diameter of the NPT threads is larger than the Nominal ...

  7. Nominal Pipe Size - Wikipedia

    en.wikipedia.org/wiki/Nominal_Pipe_Size

    Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

  8. United Nations Mission in South Sudan - Wikipedia

    en.wikipedia.org/wiki/United_Nations_Mission_in...

    The United Nations Mission in South Sudan (UNMISS) is a United Nations peacekeeping mission for South Sudan, which became independent on 9 July 2011.UNMISS [1] was established on 8 July 2011 by United Nations Security Council Resolution 1996 (2011).

  9. Yo-Yo intermittent test - Wikipedia

    en.wikipedia.org/wiki/Yo-Yo_intermittent_test

    The Yo-Yo intermittent test is aimed at estimating performance in stop-and-go sports like football (soccer), cricket, basketball and the like. It was conceived around the early 1990s by Jens Bangsbo, [1] a Danish soccer physiologist, then described in a 2008 paper, "The Yo-Yo Intermittent Recovery Test". [2]