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  2. Spotface - Wikipedia

    en.wikipedia.org/wiki/Spotface

    The most common application of spotfacing (spot facing) is facing the area around a bolt hole where the bolt's head will sit, which is often done by cutting a shallow counterbore, just deep enough "to clean up"—that is, only enough material is removed to get down past any irregularity and thus make the surface flat. [1]

  3. Drilling - Wikipedia

    en.wikipedia.org/wiki/Drilling

    Spot drilling (i.e., center drilling) Spot facing, which is machining a certain area on a casting or forging to establish an accurately located face on an otherwise rough surface. Constraining the position of the drill bit using a drill jig with drill bushings; Surface finish produced by drilling may range from 32 to 500 microinches. Finish ...

  4. Facing (machining) - Wikipedia

    en.wikipedia.org/wiki/Facing_(machining)

    This process removes the material by rotating the facing tool in the counterclockwise direction as the table feeds the work piece across the cutter. Face milling can be achieved with an end mill, but is often done with a face mill, shell mill or a fly cutter. Face milling can be done in both manual machining and CNC machining. To obtain a ...

  5. Friction stir welding - Wikipedia

    en.wikipedia.org/wiki/Friction_stir_welding

    Friction stir welding (FSW) is a solid-state joining process that uses a non-consumable tool to join two facing workpieces without melting the workpiece material. [1] [2] Heat is generated by friction between the rotating tool and the workpiece material, which leads to a softened region near the FSW tool.

  6. Process and Reality - Wikipedia

    en.wikipedia.org/wiki/Process_and_Reality

    Process and Reality is a book by Alfred North Whitehead, in which the author propounds a philosophy of organism, also called process philosophy. The book, published in 1929, is a revision of the Gifford Lectures he gave in 1927–28.

  7. Point process - Wikipedia

    en.wikipedia.org/wiki/Point_process

    The simplest and most ubiquitous example of a point process is the Poisson point process, which is a spatial generalisation of the Poisson process. A Poisson (counting) process on the line can be characterised by two properties : the number of points (or events) in disjoint intervals are independent and have a Poisson distribution. A Poisson ...

  8. Turing pattern - Wikipedia

    en.wikipedia.org/wiki/Turing_pattern

    Three examples of Turing patterns Six stable states from Turing equations, the last one forms Turing patterns. The Turing pattern is a concept introduced by English mathematician Alan Turing in a 1952 paper titled "The Chemical Basis of Morphogenesis" which describes how patterns in nature, such as stripes and spots, can arise naturally and autonomously from a homogeneous, uniform state.

  9. Opponent process - Wikipedia

    en.wikipedia.org/wiki/Opponent_process

    The opponent process is a color theory that states that the human visual system interprets information about color by processing signals from photoreceptor cells in an antagonistic manner. The opponent-process theory suggests that there are three opponent channels , each comprising an opposing color pair: red versus green , blue versus yellow ...