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  2. Valeriepieris circle - Wikipedia

    en.wikipedia.org/wiki/Valeriepieris_circle

    The concept was originally popularized by a map posted on Reddit in 2013, made by a Texas ESL teacher named Ken Myers, whose username on the site gave the figure its name. [4] Myers's original circle covers only about 10% of the Earth's total surface area, with a radius of around 4,000 kilometers (2,500 miles), centered in the South China Sea. [1]

  3. Nukemap - Wikipedia

    en.wikipedia.org/wiki/NUKEMAP

    Wellerstein's creation has garnered some popularity amongst nuclear strategists as an open source tool for calculating the costs of nuclear exchanges. [11] As of October 2024, more than 350.7 million nukes have been "dropped" on the site. [citation needed] The Nukemap was a finalist for the National Science Foundation's Visualization Challenge ...

  4. Compass (drawing tool) - Wikipedia

    en.wikipedia.org/wiki/Compass_(drawing_tool)

    Compasses are usually made of metal or plastic, and consist of two "legs" connected by a hinge which can be adjusted to allow changing of the radius of the circle drawn. . Typically one leg has a spike at its end for anchoring, and the other leg holds a drawing tool, such as a pencil, a short length of just pencil lead or sometimes a

  5. Buffer analysis - Wikipedia

    en.wikipedia.org/wiki/Buffer_analysis

    The fundamental method to create a buffer around a geographic feature stored in a vector data model, with a given radius r is as follows: [4] Single point: Create a circle around the point with radius r. Polyline, which consists of an ordered list of points (vertices) connected by straight lines. This is also used for the boundary of a polygon.

  6. FreeRADIUS - Wikipedia

    en.wikipedia.org/wiki/FreeRADIUS

    FreeRADIUS is a modular, high performance free RADIUS suite developed and distributed under the GNU General Public License, version 2, and is free for download and use.The FreeRADIUS Suite includes a RADIUS server, a BSD-licensed RADIUS client library, a PAM library, an Apache module, and numerous additional RADIUS related utilities and development libraries.

  7. Viewshed analysis - Wikipedia

    en.wikipedia.org/wiki/Viewshed_Analysis

    This variable would need to be added in cases where the radio tower emits a very narrow vertical beam. The final variable used in the viewshed analysis is the radius value. In the case of the radio tower, if the radio signal has a limited range, perhaps 10 miles, then the radius variable can be set to limit the viewshed analysis to a 10-mile ...

  8. Smith chart - Wikipedia

    en.wikipedia.org/wiki/Smith_chart

    The length of the line would then be scaled to P 1 assuming the Smith chart radius to be unity. For example, if the actual radius measured from the paper was 100 mm, the length OP 1 would be 63 mm. The following table gives some similar examples of points which are plotted on the Z Smith chart. For each, the reflection coefficient is given in ...

  9. Circular error probable - Wikipedia

    en.wikipedia.org/wiki/Circular_error_probable

    [1] [4] That is, if a given munitions design has a CEP of 100 m, when 100 munitions are targeted at the same point, an average of 50 will fall within a circle with a radius of 100 m about that point. There are associated concepts, such as the DRMS (distance root mean square), which is the square root of the average squared distance error, a ...