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"Cultural core" by Donald W. Meinig for Mormon culture published in 1970, [10] and "Source area" by Fred Kniffen (1965) and later Henry Glassie (1968) for house and barn types. Outside a core area, Glassie used Meinig's use of the terms "domain" (a dominant area) and "sphere" (area influenced but not dominant).
It was noted by Goodwin that if a monetary value were placed on the work generated by the core sphere in the United States, it would add to approximately $3.9 trillion and would account for approximately 30% of the total product. Long before the Industrial Revolution, the core sphere was the entire economy. Families and communities provided for ...
The public sphere (German: Öffentlichkeit) is an area in social life where individuals can come together to freely discuss and identify societal problems, and through that discussion influence political action. A "Public" is "of or concerning the people as a whole."
In geometry, many uniform tilings on sphere, euclidean plane, and hyperbolic plane can be made by Wythoff construction within a fundamental triangle, (p q r), defined by internal angles as π/p, π/q, and π/r. Special cases are right triangles (p q 2).
For example, one sphere that is described in Cartesian coordinates with the equation x 2 + y 2 + z 2 = c 2 can be described in spherical coordinates by the simple equation r = c. (In this system—shown here in the mathematics convention—the sphere is adapted as a unit sphere, where the radius is set to unity and then can generally be ignored ...
Finite spherical symmetry groups are also called point groups in three dimensions.There are five fundamental symmetry classes which have triangular fundamental domains: dihedral, cyclic, tetrahedral, octahedral, and icosahedral symmetry.
Atlas Coffee Club is a great example of this — every month, they pick a region and ship beans, packaged in colorful bags decorated with the country’s name and an info card about the brew.
Geodesic polyhedra are a good approximation to a sphere for many purposes, and appear in many different contexts. The most well-known may be the geodesic domes, hemispherical architectural structures designed by Buckminster Fuller, which geodesic polyhedra are named after. Geodesic grids used in geodesy also have the geometry of geodesic polyhedra.