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  2. Surface imperfections (optics) - Wikipedia

    en.wikipedia.org/wiki/Surface_imperfections_(optics)

    These imperfections are part of the surface and cannot be removed by cleaning. Surface quality is characterized either by the American military standard notation (eg "60-40") or by specifying RMS (root mean square) roughness (eg "0.3 nm RMS"). [1] American notation focuses on how visible surface defects are, and is a "cosmetic" specification.

  3. Psychology Today - Wikipedia

    en.wikipedia.org/wiki/Psychology_Today

    Psychology Today content and its therapist directory are found in 20 countries worldwide. [3] Psychology Today's therapist directory is the most widely used [4] and allows users to sort therapists by location, insurance, types of therapy, price, and other characteristics. It also has a Spanish-language website.

  4. Scriber - Wikipedia

    en.wikipedia.org/wiki/Scriber

    A scriber is a hand tool used in metal work to mark lines on workpieces, prior to machining. The process of using a scriber is called scribing and is just part of the process of marking out . It is used instead of pencils or ink lines, because the latter are hard to see, easily erased, and imprecise due to their wide mark; scribe lines are thin ...

  5. Fractography - Wikipedia

    en.wikipedia.org/wiki/Fractography

    Fractography is the study of the fracture surfaces of materials. Fractographic methods are routinely used to determine the cause of failure in engineering structures, especially in product failure and the practice of forensic engineering or failure analysis.

  6. Contact lithography - Wikipedia

    en.wikipedia.org/wiki/Contact_lithography

    As with any technology that relies on surface contact, defects are a strong concern. Defects are particularly detrimental to contact lithography in two respects. First, a hard defect can widen the gap between the mask and the substrate. This can easily cause images based on evanescent waves or surface plasmon interference to disappear.

  7. The One Freezer Item I Stock Up On Every Time I Shop At ...

    www.aol.com/lifestyle/one-freezer-item-stock...

    USA TODAY. Trump's expanded ICE raids scare kids, raise absenteeism, according to schools. Sports. Sports. Yahoo Sports. NFL free agency: Top 25 overall free agents, including Tee Higgins and Sam ...

  8. Crystallographic defect - Wikipedia

    en.wikipedia.org/wiki/Crystallographic_defect

    A crystallographic defect is an interruption of the regular patterns of arrangement of atoms or molecules in crystalline solids.

  9. Misprint on Valentino Beanie Baby tag could fetch up to $25,000

    www.aol.com/news/2017-02-09-misprint-on...

    Valentino, a Valentine's Day-born bear, isn't necessarily valuable on its own, but a misspelling on its TY tag is worth a LOT to collectors.