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  2. Clay nail - Wikipedia

    en.wikipedia.org/wiki/Clay_nail

    One of the oldest diplomatic documents known, by King Entemena, c 2400 BC.. Used by Sumerians and other Mesopotamian cultures beginning in the third millennium BC, clay nails, also referred to as dedication or foundation pegs, cones, or nails, were cone-shaped nails made of clay, inscribed with cuneiform, baked, and stuck into the mudbrick walls to serve as evidence that the temple or building ...

  3. Cone - Wikipedia

    en.wikipedia.org/wiki/Cone

    In the case of lines, the cone extends infinitely far in both directions from the apex, in which case it is sometimes called a double cone. Either half of a double cone on one side of the apex is called a nappe. The axis of a cone is the straight line passing through the apex about which the base (and the whole cone) has a circular symmetry.

  4. Pyrometric cone - Wikipedia

    en.wikipedia.org/wiki/Pyrometric_cone

    The pyrometric cone is "A pyramid with a triangular base and of a defined shape and size; the "cone" is shaped from a carefully proportioned and uniformly mixed batch of ceramic materials so that when it is heated under stated conditions, it will bend due to softening, the tip of the cone becoming level with the base at a definitive temperature.

  5. Antenna blind cone - Wikipedia

    en.wikipedia.org/wiki/Antenna_blind_cone

    A visual representation of a vertical antenna's blind cone. In telecommunications, antenna blind cone (sometimes called a cone of silence or antenna blind spot) is the volume of space, usually approximately conical with its vertex at the antenna, that cannot be scanned by an antenna because of limitations of the antenna radiation pattern and mount.

  6. List of spirals - Wikipedia

    en.wikipedia.org/wiki/List_of_spirals

    For <, spiral-ring pattern; =, regular spiral; >, loose spiral. R is the distance of spiral starting point (0, R) to the center. R is the distance of spiral starting point (0, R) to the center. The calculated x and y have to be rotated backward by ( − θ {\displaystyle -\theta } ) for plotting.

  7. Conical surface - Wikipedia

    en.wikipedia.org/wiki/Conical_surface

    An elliptic cone, a special case of a conical surface In geometry , a conical surface is a three-dimensional surface formed from the union of lines that pass through a fixed point and a space curve .

  8. Template method pattern - Wikipedia

    en.wikipedia.org/wiki/Template_method_pattern

    The Template pattern provides a solution. If the generated code follows the template method pattern, the generated code will all be an abstract superclass. Provided that hand-written customizations are confined to a subclass, the code generator can be run again without risk of over-writing these modifications.

  9. Pattern recognition (psychology) - Wikipedia

    en.wikipedia.org/wiki/Pattern_recognition...

    In psychology and cognitive neuroscience, pattern recognition is a cognitive process that matches information from a stimulus with information retrieved from memory. [1]Pattern recognition occurs when information from the environment is received and entered into short-term memory, causing automatic activation of a specific content of long-term memory.