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  2. Polar code (coding theory) - Wikipedia

    en.wikipedia.org/wiki/Polar_code_(coding_theory)

    However, with the block sizes used in industry, the performance of the successive cancellation is poor compared to well-defined and implemented coding schemes such as low-density parity-check code (LDPC) and turbo code. Polar performance can be improved with successive cancellation list decoding, but its usability in real applications is still ...

  3. Well-known text representation of geometry - Wikipedia

    en.wikipedia.org/wiki/Well-known_text...

    Coordinates for geometries may be 2D (x, y), 3D (x, y, z), 4D (x, y, z, m) with an m value that is part of a linear referencing system or 2D with an m value (x, y, m). Three-dimensional geometries are designated by a "Z" after the geometry type and geometries with a linear referencing system have an "M" after the geometry type.

  4. Cataclysmic pole shift hypothesis - Wikipedia

    en.wikipedia.org/wiki/Cataclysmic_pole_shift...

    The geographic poles are defined by the points on the surface of Earth that are intersected by the axis of rotation. The pole shift hypothesis describes a change in location of these poles with respect to the underlying surface – a phenomenon distinct from the changes in axial orientation with respect to the plane of the ecliptic that are caused by precession and nutation, and is an ...

  5. Polar Beverages - Wikipedia

    en.wikipedia.org/wiki/Polar_Beverages

    In 1994, Polar made a TV commercial where a polar bear considers drinking a Coca-Cola, but throws it into a recycling bin marked, "Keep the Arctic pure." The polar bear then reaches down into the freezing Arctic water and pulls out a can of Polar Seltzer and drinks from it contentedly. [ 12 ]

  6. World Geodetic System - Wikipedia

    en.wikipedia.org/wiki/World_Geodetic_System

    The World Geodetic System (WGS) is a standard used in cartography, geodesy, and satellite navigation including GPS.The current version, WGS 84, defines an Earth-centered, Earth-fixed coordinate system and a geodetic datum, and also describes the associated Earth Gravitational Model (EGM) and World Magnetic Model (WMM).

  7. Normal distribution - Wikipedia

    en.wikipedia.org/wiki/Normal_distribution

    About 68% of values drawn from a normal distribution are within one standard deviation σ from the mean; about 95% of the values lie within two standard deviations; and about 99.7% are within three standard deviations. [8] This fact is known as the 68–95–99.7 (empirical) rule, or the 3-sigma rule.

  8. International Code for Ships Operating in Polar Waters

    en.wikipedia.org/wiki/International_Code_for...

    The Polar Code applies to ships operating in Polar Waters. The Polar Code stems from previous IMO documents, including voluntary guidelines in both 2002 [5] and 2010. [6] As part of ongoing international work on the Polar Code, an IMO Workshop on the code's Environmental Aspects was held in Cambridge, United Kingdom, in September 2011.

  9. Polar topology - Wikipedia

    en.wikipedia.org/wiki/Polar_topology

    List of topologies – List of concrete topologies and topological spaces; Locally convex topological vector space – A vector space with a topology defined by convex open sets; Polar set – Subset of all points that is bounded by some given point of a dual (in a dual pairing) Topologies on spaces of linear maps; Topology consistent with the ...