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  2. File:Diagram of a Refrigerator Door.pdf - Wikipedia

    en.wikipedia.org/wiki/File:Diagram_of_a...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  3. Minories (model railway) - Wikipedia

    en.wikipedia.org/wiki/Minories_(model_railway)

    Minories is a 'deceptively simple' [1] design for a model railway layout, designed by C. J. Freezer. The design was first published in Railway Modeller in 1957 and it became a regular of Peco's many collected plans books afterwards. [2] It is notable as an influential design, more than as a single instance of the model.

  4. Dilution refrigerator - Wikipedia

    en.wikipedia.org/wiki/Dilution_refrigerator

    As shown in the phase diagram, at very low temperatures the concentrated phase is essentially pure 3 He, while the dilute phase contains about 6.6% 3 He and 93.4% 4 He. The working fluid is 3 He, which is circulated by vacuum pumps at room temperature. The 3 He enters the cryostat at a pressure of a few hundred millibar.

  5. Zeiss formula - Wikipedia

    en.wikipedia.org/wiki/Zeiss_formula

    In photographic optics, the Zeiss formula is a supposed formula for computing a circle of confusion (CoC) criterion for depth of field (DoF) calculations. The formula is c = d / 1730 {\displaystyle c=d/1730} , where d {\displaystyle d} is the diagonal measure of a camera format, film, sensor, or print, and c {\displaystyle c} the maximum ...

  6. C. J. Freezer - Wikipedia

    en.wikipedia.org/wiki/C._J._Freezer

    Cyril John Freezer (27 June 1924 – 19 May 2009) was an English railway modeller, writer, and magazine editor. He edited Railway Modeller from 1950 to 1978, and Model Railways from 1978 until 1983.

  7. Information criterion - Wikipedia

    en.wikipedia.org/wiki/Information_criterion

    Information criterion may refer to: Information criterion (statistics) , a method to select a model in statistics Information criteria (information technology) , a component of an information technology framework which describes the intent of the objectives

  8. Nyquist stability criterion - Wikipedia

    en.wikipedia.org/wiki/Nyquist_stability_criterion

    The Nyquist plot for () = + + with s = jω.. In control theory and stability theory, the Nyquist stability criterion or Strecker–Nyquist stability criterion, independently discovered by the German electrical engineer Felix Strecker [] at Siemens in 1930 [1] [2] [3] and the Swedish-American electrical engineer Harry Nyquist at Bell Telephone Laboratories in 1932, [4] is a graphical technique ...

  9. Chebychev–Grübler–Kutzbach criterion - Wikipedia

    en.wikipedia.org/wiki/Chebychev–Grübler...

    A single unconstrained body soaring in 3-space has 6 degrees of freedom: 3 translational (say, x,y,z); and 3 rotational (say, roll, pitch, yaw). So a system of n {\displaystyle n} unconnected rigid bodies moving in space (a flock of n {\displaystyle n} soaring seagulls) has 6 n {\displaystyle 6n} degrees of freedom measured relative to a fixed ...