Angular Reconstitution: a common-lines method designed to determine the relative angles between three projections of an object with arbitrary symmetry [van Heel, 1987a]. The method works on the basis of comparing sinograms, which are plots of line projections as a function of angle.

 

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Angular Reconstitution: a common-lines method designed to determine the relative angles between three projections of an object with arbitrary symmetry [van Heel, 1987a]. The method works on the basis of comparing s . . . View Full Definition

Rectangular (Government) Survey System: A system established in 1785 by the federal government, providing for surveying and describing land by reference to principal meridians and base lines.

Rectangular Drainage: A drainage pattern in which stream channels develop within a large-scale network of intersecting joints. This drainage pattern is characterized by right-angle bends in the channels of stream . . . View Full Definition

Triangular Arbitrage: A measure of the excess return per unit of risk, where excess return is defined as the difference between the portfolio's return and the risk-free rate of return over the same evaluation per . . . View Full Definition

Bi-Angular Motion: Started in the health club and now used at home, the Bi-Angular mechanism guides you through the optimum path of motion while applying resistance from two directions at the same time. This s . . . View Full Definition

Angular Velocity Of The Earths Rotation: Time rate of change of angular displacement relative to the fixed stars. It is equal to 0.729,211 x 10-4 radian/second.

Angular Houses: The first, fourth, seventh and tenth houses. In a quadrant system (unequal house), the angles form the cusps of these houses. The experiential focus of these house is initiatory and dynamic. . . . View Full Definition

Angular Field: The angle subtended at the lens by the diameter of the largest circle within which the lens gives an image of acceptable sharpness and even illumination.

Angular Momentum Quantum Number: (ell) azimuthal quantum number; orbital angular momentum quantum number. A quantum number that labels the subshells of an atom. Sometimes called the orbital angular momentum quantum number, . . . View Full Definition

Angular Unconformity: An erosional surface that separates rock units of differing dips. The rocks below the surface were deposited, deformed and eroded. The younger rocks above then accumulated upon the erosional surface.