Results 201 to 210 of about 2,881 (262)

The Unusual Mesophases and Properties Exhibited by a Family of Glycosteroids. [PDF]

open access: yesChemistry
Ali-Rachedi F   +10 more
europepmc   +1 more source

conic sections

2019
The curves known as conic sections, the ellipse, hyperbola, and parabola, were investigated intensely in Greek mathematics. The most famous work on the subject was the Conics, in eight books by Apollonius of Perga, but conics were also studied earlier by Euclid and Archimedes, among others. Conic sections were important not only for purely mathematical
openaire   +1 more source

Relativistic conic sections

General Relativity and Gravitation, 1983
A classification of the possible types of the relative orbits of realistic binary stars in the post-Newtonian approximation of general relativity is presented. Definitions of the relativistic conic sections and their elements are proposed, generalizing the corresponding ones of classical celestial mechanics. The results are compared and contrasted with
openaire   +1 more source

Conic Sections

1992
Abstract When The Greek geometers had exhausted, as they thought, the more obvious and interesting properties of figures made up of straight lines and circles, they turned to the study of other curves; and, with their almost infallible instinct for hitting upon things worth thinking about, they chiefly devoted themselves to conic ...
openaire   +1 more source

Conic that best fits an off-axis conic section

Annual Meeting Optical Society of America, 1986
To help in the fabrication of off-axis conic sections, we present a method of approximating this off-axis section by an on-axis conic centered on the portion desired. This method is based on the continuum least-squares method to obtain the vertex’s curvature and conic constant of the fitted conic on-axis, given the curvature at the vertex and the conic
O, Cardona-Nunez   +4 more
openaire   +2 more sources

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