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  2. Photoconductance decay - Wikipedia

    en.wikipedia.org/wiki/Photoconductance_decay

    Photoconductance decay or Photoconductivity decay (PCD or PC), is a non-destructive analytical technique used to measure the lifetime of minority charge carriers in a semiconductor, especially in silicon wafers. [1] The technique studies the transient photoconductivity of a semiconductor sample during or after it is illuminated by a light pulse.

  3. Rogowski coil - Wikipedia

    en.wikipedia.org/wiki/Rogowski_coil

    This formula assumes the turns are evenly spaced and that these turns are small relative to the radius of the coil itself. The output of the Rogowski coil is proportional to the derivative of the wire current. The output is often integrated so the output is proportional to the wire's current:

  4. Wheel sizing - Wikipedia

    en.wikipedia.org/wiki/Wheel_sizing

    This number will vary depending on the number of lugs, the PCD, the material used and the type of axle the wheel is used on. A wheel used on a free rolling trailer axle will carry more weight than that same wheel used on the drive or steering axle of a vehicle. All wheels will have the load capacity stamped on the back of the wheel.

  5. Bolt circle - Wikipedia

    en.wikipedia.org/wiki/Bolt_circle

    On steering wheels for cars utilizing bolt circles, this usually measures 6×70 mm. [3] Some racing wheels attach to the car via a quick release hub, [4] and this hub then usually has a corresponding bolt circle of 6×70 mm. Example of other less used patterns include: 3×1.75 in (44.45 mm), 5×2.75 in (69.85 mm), 6×74 mm and 6×2.75 in (69.85 mm).

  6. Geometric dimensioning and tolerancing - Wikipedia

    en.wikipedia.org/wiki/Geometric_dimensioning_and...

    Example of true position geometric control defined by basic dimensions and datum features. Geometric dimensioning and tolerancing (GD&T) is a system for defining and communicating engineering tolerances via a symbolic language on engineering drawings and computer-generated 3D models that describes a physical object's nominal geometry and the permissible variation thereof.

  7. List of gear nomenclature - Wikipedia

    en.wikipedia.org/wiki/List_of_gear_nomenclature

    This page lists the standard US nomenclature used in the description of mechanical gear construction and function, together with definitions of the terms. The terminology was established by the American Gear Manufacturers Association (AGMA), under accreditation from the American National Standards Institute (ANSI).

  8. It's time for Nordstrom's Half-Yearly Sale: Stock up on ... - AOL

    www.aol.com/lifestyle/its-time-for-nordstroms...

    Kiehl's beloved formula is rich enough to hydrate your skin for hours without leaving it greasy or oily. "Very nice lotion," raved one shopper. "Very healing without being too greasy.

  9. Photon-counting computed tomography - Wikipedia

    en.wikipedia.org/wiki/Photon-counting_computed...

    When a photon interacts in a PCD, the amplitude of the resulting electrical pulse is roughly proportional to the photon energy. By comparing each pulse produced in a pixel with a suitable low-energy threshold, contributions from low-energy events (resulting from both photon interactions and electronic noise) can be filtered out. This ...