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  2. Foucault knife-edge test - Wikipedia

    en.wikipedia.org/wiki/Foucault_knife-edge_test

    Foucault test setup to measure a mirror. The Foucault knife-edge test is an optical test to accurately measure the shape of concave curved mirrors. It is commonly used by amateur telescope makers for figuring primary mirrors in reflecting telescopes. It uses a relatively simple, inexpensive apparatus compared to other testing techniques.

  3. Comparison of satellite navigation software - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_satellite...

    Comparison of satellite navigation software. This is a list of notable commercial satellite navigation software (also known as GPS software) for various devices, with a specific focus on mobile phones, tablets, tablet PCs, (Android, iOS, Windows). Zenrin, AutoNavi, Geocentre Consulting, Tele Atlas, Google Map Maker, SK telecom, ORION-ME, INEGI ...

  4. Beam diameter - Wikipedia

    en.wikipedia.org/wiki/Beam_diameter

    The beam diameter or beam width of an electromagnetic beam is the diameter along any specified line that is perpendicular to the beam axis and intersects it. Since beams typically do not have sharp edges, the diameter can be defined in many different ways. Five definitions of the beam width are in common use: D4σ, 10/90 or 20/80 knife-edge, 1 ...

  5. Arkansas toothpick - Wikipedia

    en.wikipedia.org/wiki/Arkansas_toothpick

    A replica Arkansas Toothpick on display board. In modern terminology, the Arkansas toothpick is a heavy dagger with a 12-to-20-inch (30 to 51 cm) pointed, straight blade. [ 1] The knife can be used for thrusting and slashing. James Black, known for improving the Bowie knife, [ 2] is credited with inventing the Arkansas toothpick.

  6. Navteq - Wikipedia

    en.wikipedia.org/wiki/Navteq

    Here. Website. navteq.com (archived) Navteq Corporation (styled as 'NAVTEQ') was an American Chicago -based provider of geographic information system (GIS) data and a major provider of base electronic navigable maps. The company was acquired by Nokia in 2007–2008, and fully merged into Nokia in 2011 to form part of the Here business unit.

  7. Tele Atlas - Wikipedia

    en.wikipedia.org/wiki/Tele_Atlas

    Tele Atlas is a Netherlands-based company founded in 1984 which delivers digital maps and other dynamic content for navigation and location-based services, including personal and in-car navigation systems, and provides data used in a wide range of mobile and Internet map applications. Since 30 July 2008, the company has been a wholly owned ...

  8. Straight razor - Wikipedia

    en.wikipedia.org/wiki/Straight_razor

    A straight razor is a razor with a blade that can fold into its handle. [1] [2] They are also called open razors and cut-throat razors. [3] [4] [5] The predecessors of the modern straight razors include bronze razors, with cutting edges and fixed handles, produced by craftsmen from Ancient Egypt during the New Kingdom (1569 — 1081 BC). Solid ...

  9. Map database management - Wikipedia

    en.wikipedia.org/wiki/Map_database_management

    Map database management systems are software programs designed to store and recall spatial information for navigation applications, and are thus a form of Geographic information system. They are widely used in localization and navigation, especially in automotive applications. Moreover, they are playing an increasingly important role in the ...