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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. It is widely used in optical engineering laboratory work to analyze and ...

  3. Screen printing - Wikipedia

    en.wikipedia.org/wiki/Screen_printing

    Screen printing is a printing technique where a mesh is used to transfer ink (or dye) onto a substrate, except in areas made impermeable to the ink by a blocking stencil.A blade or squeegee is moved across the screen to fill the open mesh apertures with ink, and a reverse stroke then causes the screen to touch the substrate momentarily along a line of contact.

  4. Radar beacon - Wikipedia

    en.wikipedia.org/wiki/Radar_beacon

    Radar beacon. Racon signal as seen on a radar screen. This beacon receives using sidelobe suppression and transmits the letter "Q" in Morse code near Boston Harbor (Nahant) 17 January 1985. Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1 ...

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    AOL is a leading online service provider that offers free email, news, entertainment, and more. With AOL, you can access your email from any device, customize your inbox, and enjoy a secure and reliable email experience. Sign in to AOL today and discover the benefits of AOL Mail.

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    We support over 70+ languages. Start for free. Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  7. List of common display resolutions - Wikipedia

    en.wikipedia.org/wiki/List_of_common_display...

    16:9. 8,294,400. 7680 × 4320. 8K UHDTV. 4320p. 33,177,600. Many of these resolutions are also used for video files that are not broadcast. These may also use other aspect ratios by cropping otherwise black bars at the top and bottom which result from cinema aspect ratios greater than 16∶9, such as 1.85 or 2.35 through 2.40 (dubbed ...

  8. Public funds for religious charter school would be ...

    www.aol.com/news/oklahoma-supreme-court-rules...

    In her dissent, Kuehn wrote that excluding St. Isidore from operating a charter school based solely on its religious affiliation would violate the Free Exercise Clause of the First Amendment to ...

  9. Is It Too Late to Buy Super Micro Computer Stock Now?

    www.aol.com/too-buy-super-micro-computer...

    So, yes, if you bought shares of Supermicro a few years ago, you made a great move. But if you didn't, it isn't too late to benefit from this company's growth -- because there's likely a lot more ...