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  2. Snell & Wilcox Zone Plate - Wikipedia

    en.wikipedia.org/wiki/Snell_&_Wilcox_Zone_Plate

    Snell & Wilcox SW2 and SW4 "Zone Plate" Test Chart (also referred to as Snell & Wilcox Test Pattern) were TV test cards introduced in the 1990s and used with NTSC, PAL and SDTV systems. [ 1 ] Popular versions of the test charts were made available on Laserdisc and DVD-Video , allowing home users and professionals to test and calibrate their ...

  3. Uline - Wikipedia

    en.wikipedia.org/wiki/Uline

    Uline was founded in 1980 by Elizabeth "Liz" and Richard "Dick" Uihlein. Richard Uihlein is a descendant of the brewers of Schlitz beer. [1] With start-up funds from his father, Edgar Uihlein, Richard and Elizabeth founded the company from their basement after recognizing a local need for a shipping supply distributor.

  4. Richard and Elizabeth Uihlein - Wikipedia

    en.wikipedia.org/wiki/Richard_and_Elizabeth_Uihlein

    That year, with start-up funds from his father, Uihlein and his wife Elizabeth (Liz) Uihlein founded Uline, a shipping supplies company; the couple continue to own the company. [ 8 ] [ 9 ] The company expanded rapidly and is now one of the largest U.S. privately held companies; in 2014, Forbes estimated a company value of between $700 million ...

  5. 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.

  6. Laboratory quality control - Wikipedia

    en.wikipedia.org/wiki/Laboratory_quality_control

    A control chart is a more specific kind of run chart. The control chart is one of the seven basic tools of quality control, which also include the histogram, pareto chart, check sheet, cause and effect diagram, flowchart and scatter diagram. Control charts prevent unnecessary process adjustments, provide information about process capability ...

  7. Calibration - Wikipedia

    en.wikipedia.org/wiki/Calibration

    This is called a limited calibration. But if the final measurement requires 10% accuracy, then the 3% gauge never can be better than 3.3:1. Then perhaps adjusting the calibration tolerance for the gauge would be a better solution. If the calibration is performed at 100 units, the 1% standard would actually be anywhere between 99 and 101 units.

  8. High-Quality Multivitamins for Women Per Dietitians and Reviews

    www.aol.com/high-quality-multivitamins-women-per...

    $21.92 at amazon.com. Women’s Multi 50+ Women ages 50 and up have very different nutritional needs than their younger counterparts. Thorne’s Women’s Multi 50+ meets those with a supplement ...

  9. Deadweight tester - Wikipedia

    en.wikipedia.org/wiki/Deadweight_tester

    A dead weight tester (DWT) is a calibration standard method that uses a piston cylinder on which a load is placed to make an equilibrium with an applied pressure underneath the piston. Deadweight testers are secondary standards which means that the pressure measured by a deadweight tester is defined through other quantities: length, mass and time.

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