sphericity
61Echo satellite — The Echo satellites were NASA s first passive communications satellite experiment. Each spacecraft was designed as a metallized balloon satellite acting as a passive reflector of microwave signals. Communication signals were bounced off of it… …
62List of mathematics articles (M) — NOTOC M M estimator M group M matrix M separation M set M. C. Escher s legacy M. Riesz extension theorem M/M/1 model Maass wave form Mac Lane s planarity criterion Macaulay brackets Macbeath surface MacCormack method Macdonald polynomial Machin… …
63List of mathematics articles (S) — NOTOC S S duality S matrix S plane S transform S unit S.O.S. Mathematics SA subgroup Saccheri quadrilateral Sacks spiral Sacred geometry Saddle node bifurcation Saddle point Saddle surface Sadleirian Professor of Pure Mathematics Safe prime Safe… …
64Circularity — can mean: Begging the question, i.e., circular logic Circular definition Circularity (Roundness) specification of an object. A circularity ratio as a compactness measure of a shape An assumption of ANOVAs with repeated measures. It denotes the… …
65Sauter diameter — The Sauter mean diameter (SMD) is defined as the diameter of a sphere that has the same volume/surface area ratio as a particle of interest. Originally developed by German scientist, J. Sauter in the late 1920s. The SMD is common measure in fluid …
66Conflict thesis — For a socio historical theory with a similar name, see Conflict theory. Conflict: Galileo before the Holy Office, by Joseph Nicolas Robert Fleury, a 19th century depiction of the Galileo Affair, religion suppressing heliocentric science. The… …
67Exploration of the Moon — Apollo 12 lunar module Intrepid prepares to descend towards the surface of the Moon. NASA photo. The physical exploration of the Moon began when Luna 2, a space probe launched by the Soviet Union, made an impact on the surface of the Moon on …
68Compactness measure of a shape — The compactness measure of a shape, sometimes called the shape factor, is a numerical quantity representing the degree to which a shape is compact. The meaning of compact here is not related to the topological notion of compact space. Various… …
69FIFA Approved — is a mark of quality for a football (soccer ball) awarded by FIFA. Balls are subjected to a series of seven tests at the Swiss Federal Test Laboratory: *Weight *Circumference *Sphericity *Loss of air pressure *Water absorption *Rebound *Shape and …
70History of cartography — The Fra Mauro map, one of the greatest memorial of medieval cartography, was made around 1450 by the Venetian monk Fra Mauro. It is a circular world map drawn on parchment and set in a wooden frame, about two meters in diameter Cartography (from… …
