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geodesy
(Encyclopedia) geodesygeodesyjēŏdˈĭsē [key] or geodetic surveying, theory and practice of determining the position of points on the earth's surface and the dimensions of areas so large that the…feedback
(Encyclopedia) CE5 Basic feedback control system feedback, arrangement for the automatic self-regulation of an electrical, mechanical, or biological system by returning part of its output as…sextant
(Encyclopedia) CE5 Sextant sextant, instrument for measuring the altitude of the sun or another celestial body; such measurements can then be used to determine the observer's geographical…radio range
(Encyclopedia) radio range, geographically fixed radio transmitter that radiates coded signals in all directions to enable aircraft and ships to determine their bearings. An aircraft or ship can…conceptualism
(Encyclopedia) conceptualism, in philosophy, position taken on the problem of universals, initially by Peter Abelard in the 12th cent. Like nominalism it denied that universals exist independently of…Deneb
(Encyclopedia) DenebDenebdĕnˈĕb [key], brightest star in the constellation Cygnus; Bayer designation Alpha Cygni; 1992 position R.A. 20h41.2m, Dec. +45°15′. It is a white supergiant of spectral class…matrix
(Encyclopedia) matrix, in mathematics, a rectangular array of elements (e.g., numbers) considered as a single entity. A matrix is distinguished by the number of rows and columns it contains. The…Pretorius, Martinus Wessel
(Encyclopedia) Pretorius, Martinus WesselPretorius, Martinus Wesselmärtēˈnəs vĕsˈəl [key]Pretorius, Martinus Wessel prātôrˈēəs [key], 1818?–1901, Boer (Afrikaner) statesman; son of Andries Pretorius…Zhu De
(Encyclopedia) Zhu De or Chu TehZhu Deboth: j&oomacr; dŭ [key], 1886–1976, Chinese Communist soldier and leader. He was graduated (1911) from the Yunnan military academy and served in various…orbit
(Encyclopedia) CE5 Important points in a planet's orbit as seen from the earth orbit, in astronomy, path in space described by a body revolving about a second body where the motion of the…Trending
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