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Two-dimensional image of an axisymmetric water jet, obtained by the laser-induced fluorescence technique. A neodymium:yttrium-aluminum-garnet laser beam, shaped into a sheet of 250-micrometer thickness by using suitable lenses, was directed into a…

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from article Turbulent flow

Typical signals of ε′, a component of the turbulent energy dissipation, normalized by its mean value 〈ε′&x3009 x232A;. (a) Signal obtained in a laboratory turbulent boundary layer at a moderate Reynolds number (defined suitably). (b) Signal obtained…

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from article Chemistry

Periodic table. (Jaap Hart/Getty Images)

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from article Flat-panel display device

Field-emission display, an example of a matrix-addressed display. Each pixel is addressed in an X-Y matrix. In the case of a color display, each pixel is subdivided into a red, a blue, and a green subpixel.

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from article Digital object identifier system

Digital Object Identifier components.

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from article Sewage solid

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from article Sewage solid

Time required for 90% digestion of sewage sludge at different temperatures. (After K. Imhoff and G.M. Fair, Sewage Treatment, John Wiley & Sons, 1940, reprint 1946)

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from article Mercury (element)