Thesaurus entry: spiral

Article: Spiral
The Gale Encyclopedia of Science;      700+ words ... ... at which it is rotated. Some common spirals include the spiral of Archimedes and the hyperbolic spiral ... the logarithmic spiral, parabolic spiral, and the hyperbolic spiral. The simplest of all spirals was discovered by the ancient Greek ...

Article: Spirals in potential vorticity. Part II: Stability
Journal of the Atmospheric Sciences;  June 1, 1998 ;     700+ words ... ... shown here that all such spiral-shaped PV filaments ... varies only weakly with spiral shape. Contour dynamics ... associated with PV spirals and to some extent isolated ... characterization of atmospheric spirals. 1. Introduction In ... the instability of a spiral-shaped vorticity filament ...

Article: Inspired Spirals.
Arts & Activities;  January 1, 2001 ;     700+ words ... ... Universe is the spiral. Galaxies and ... often enormous spirals floating in outer ... also make use of spirals. These structures have spiral ramps that permit ... decorations use carved spiral repeating patterns, while other spirals appear as curly ...

Article: Spiral antennas for broadband applications.(PRODUCT ...
Microwave Journal;  January 1, 2005 ;     700+ words ... ... The most commonly used spiral antenna types are the ... arm Archimedean planar spirals. The equiangular spiral is a true self-complementary ... consist of conducting spiral circuits etched on dielectric ... transformer assemblies. The spirals are mounted atop cylindrical ...

Article: Spiral eddies
Journal of Physical Oceanography;  March 1, 2002 ;     700+ words ... ... lines to be exclusive to the spirals: ". . . spiral features, unlike other surface ... persist, still tracing out spirals, in SAR images at somewhat ... account on the discovery of spirals. In summary, spiral eddies are submesoscale cyclonic ...

Article: Spirals in the sky.(SCIENCE SCOOPS)
Odyssey;  November 1, 2007 ;     700+ words ... ... Way and other spiral galaxies got their ... Sorting Out the Spirals Galaxies are sometimes ... three types, spiral galaxies (often just called spirals), usually win ... though some spirals have patchy structures ... you think of the spiral arms as material ...

Article: Improved spiral geometry for high-speed rail and predicted ...
Railway Track and Structures;  June 1, 2003 ;     700+ words ... ... way of thinking about spirals. The comparison is based ... vehicle over an improved spiral and over the corresponding ... the traditional linear spiral shape. They found that, with the improved spiral geometry including raised ... track at the ends of spirals were reduced sufficiently ...