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1) Compare this with the parabola x 2 = 4 f y , {\displaystyle x^{2}=4fy,} (2) which has its vertex at the origin, opens upward, and has focal length f (see preceding sections of this article). Equations (1) and (2) are equivalent if R = 2 f . Therefore, this is the condition for the circle and parabola to coincide at and extremely close to the origin. The radius of curvature at the origin ...
Look up trapezoid in Wiktionary, the free dictionary. In geometry, a trapezoid ( / ˈtræpəzɔɪd /) in North American English, or trapezium ( / trəˈpiːziəm /) in British English, [1] [2] is a quadrilateral that has only one pair of parallel sides. The parallel sides are called the bases of the trapezoid. The other two sides are called the ...
Website. ncbi.nlm.nih.gov. The National Center for Biotechnology Information ( NCBI) [1] [2] is part of the United States National Library of Medicine (NLM), a branch of the National Institutes of Health (NIH). It is approved and funded by the government of the United States. The NCBI is located in Bethesda, Maryland, and was founded in 1988 ...
Welcome centers, also commonly known as visitors' centers, visitor information centers, or tourist information centers, are buildings located at either entrances to states on major ports of entry, such as interstates or major highways, e.g. U.S. Routes or state highways, or in strategic cities within regions of a state, e.g. Southern California, Southwest Colorado, East Tennessee, or the South ...
In mathematics and physics, the centroid, also known as geometric center or center of figure, of a plane figure or solid figure is the arithmetic mean position of all the points in the surface of the figure. [further explanation needed] The same definition extends to any object in - dimensional Euclidean space. [1]
Information Operations is a category of direct and indirect support operations for the United States Military. By definition in Joint Publication 3-13, "IO are described as the integrated employment of electronic warfare (EW), computer network operations (CNO), psychological operations (PSYOP), military deception (MILDEC), and operations security (OPSEC), in concert with specified supporting ...
A center of excellence ( COE or CoE ), also called an excellence center, is a team, a shared facility or an entity that provides leadership, best practices, research, support, or training for a focus area. Due to its broad usage and vague legal precedent, a "center of excellence", in one context, may have completely different characteristics ...
United StatesArmed Forces. The Defense Information Systems Agency ( DISA ), known as the Defense Communications Agency ( DCA) until 1991, is a United States Department of Defense (DoD) combat support agency composed of military, federal civilians, and contractors.