Showing papers on "Perspective (geometry) published in 1965"
TL;DR: With some knowledge of perspective and by use of a perspective chart it is possible to construct an accurate three-dimensional illustration depicting the interrelation of tissue components from electron micrographs of serial sections of biological materials.
Abstract: With some knowledge of perspective and by use of a perspective chart it is possible to construct an accurate three-dimensional illustration depicting the interrelation of tissue components from electron micrographs of serial sections of biological materials. Tracings of pertinent structures from electron micrographs are overlaid with a grid plane and subsequently redrawn on a perspective grid plane. The new tracings are then connected to one another in the most logical manner to form an illustration in perspective.
15 citations
01 Jan 1965
TL;DR: In this paper, the authors proved that between two circles or between a circle in one plane and a straight line in another plane, there also exists two perspective centers and an AB from which the scattering coefficients of a microwave network may be evaluated graphically by several ways.
Abstract: Reflection coefficient T1, in input terminal plane of a two-port, linear, reciprocal microwave network is a linear fractional transformation of reflection coefficient T2 in output terminal plane The constants of the linear fractional transformation are related to scattering coefficients of the network A linear fractional transformation maps circles and straight lines in one plane into circles and straight lines in another plane A Weiss-floch proved that between two straight lines, there exist two perspective centers and a straight line AB, from which image point on straight line in one plane can be located graphically if point on straight line in another plane is given By means of theorem of cross ratio the paper proves that between two circles or between a circle in one plane and a straight line in another plane there also exists two perspective centers and a straight line AB from which the scattering coefficients of a microwave network may be evaluated graphically by several ways In this paper four examples are given They are short-circuit method, variable resistive-load method, scattering coefficients combination method and scattering coefficients division method The result obtained by short-circuit method is same as that given by G A Deschamps
2 citations