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  2. Dental braces - Wikipedia

    en.wikipedia.org/wiki/Dental_braces

    The application of braces moves the teeth as a result of force and pressure on the teeth. Traditionally, four basic elements are used: brackets, bonding material, arch wire, and ligature elastic (also called an "O-ring"). The teeth move when the arch wire puts pressure on the brackets and teeth.

  3. Bottom bracket - Wikipedia

    en.wikipedia.org/wiki/Bottom_bracket

    The plug is machined to accept a typical bottom bracket, but offset from the center of the plug, so that by rotating the plug, the location of the bottom bracket (and hence the chain tension) may be adjusted (fore and aft to tension the chain, the upper or lower eccentric position for a given chain length can be chosen to fine tune bottom ...

  4. Image geometry correction - Wikipedia

    en.wikipedia.org/wiki/Image_geometry_correction

    The simplest application of image geometry correction is a specific case known as keystone distortion correction derived from Keystone effect.Keystone distortion gets its name from the symmetric trapezoidal distortion resulting from misaligned projector placement in the vertical dimension (although the term is generally applied to the non-symmetric quadrilateral shape that occurs from an off ...

  5. Middle-third rule - Wikipedia

    en.wikipedia.org/wiki/Middle-third_rule

    In civil engineering, the middle-third rule states that no tension is developed in a wall or foundation if the resultant force lies within the middle third of the structure. ...

  6. Wood warping - Wikipedia

    en.wikipedia.org/wiki/Wood_warping

    Different types of wood warping. Wood warping is a deviation from flatness in timber as a result of internal residual stress caused by uneven shrinkage. Warping primarily occurs due to uneven expansion or contraction caused by changes in moisture content.

  7. Warped Tour - Wikipedia

    en.wikipedia.org/wiki/Warped_Tour

    Following the first Warped Tour, the skateboard shoe manufacturer Vans became the tour's main sponsor, when it then became known as the Vans Warped Tour. [5] Although Vans continued as main sponsor and lent its name to the festival, other sponsors also participated, with stages or other aspects of the festival being named after them on occasion.

  8. Anchor plate - Wikipedia

    en.wikipedia.org/wiki/Anchor_plate

    A stylized anchor plate in the cloister of the Church of St. Trophime, Arles (France). An anchor plate, floor plate [1] or wall washer is a large plate or washer connected to a tie rod or bolt.

  9. Post weld heat treatment - Wikipedia

    en.wikipedia.org/wiki/Post_weld_heat_treatment

    Post weld heat treatment (PWHT) is a controlled process in which a material that has been welded is reheated to a temperature below its lower critical transformation temperature, and then it is held at that temperature for a specified amount of time. [1]