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  2. Windowed envelope - Wikipedia

    en.wikipedia.org/wiki/Windowed_envelope

    Windowed envelope. US Patent 701,839 for a windowed envelope. Modern envelope with a single window for the recipient address. A windowed envelope is a conventional envelope with a transparent (typically PET or BOPS Bi-oriented polystyrene [1] plastic film) window to allow the recipient's address to be printed on the paper contained within.

  3. Envelope - Wikipedia

    en.wikipedia.org/wiki/Envelope

    An envelope is a common packaging item, usually made of thin, flat material. It is designed to contain a flat object, such as a letter or card. Traditional envelopes are made from sheets of paper cut to one of three shapes: a rhombus, a short-arm cross or a kite. These shapes allow the envelope structure to be made by folding the sheet sides ...

  4. Overton window - Wikipedia

    en.wikipedia.org/wiki/Overton_window

    The Overton window is an approach to identifying the ideas that define the spectrum of acceptability of governmental policies. It says politicians can act only within the acceptable range. Shifting the Overton window involves proponents of policies outside the window persuading the public to expand the window. Proponents of current policies, or ...

  5. Window function - Wikipedia

    en.wikipedia.org/wiki/Window_function

    Most popular window functions are similar bell-shaped curves. In signal processing and statistics, a window function (also known as an apodization function or tapering function[ 1 ]) is a mathematical function that is zero-valued outside of some chosen interval. Typically, window functions are symmetric around the middle of the interval ...

  6. Morlet wavelet - Wikipedia

    en.wikipedia.org/wiki/Morlet_wavelet

    In mathematics, the Morlet wavelet (or Gabor wavelet) [ 1 ] is a wavelet composed of a complex exponential (carrier) multiplied by a Gaussian window (envelope). This wavelet is closely related to human perception, both hearing [ 2 ] and vision. [ 3 ]

  7. Centre for Window and Cladding Technology - Wikipedia

    en.wikipedia.org/wiki/Centre_for_Window_and...

    The Centre for Window and Cladding Technology (CWCT) is a publisher of standards and guidance only (not regulations), on corrosion, intrusion, fenestration, weather and fire resistance, acoustic and impact performance, of building envelopes, facades, cladding and glazing. Founded in 1989 and based in Bath, Somerset, [ 1] the CWCT provides ...

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