Copyright © Philip M. Parker, INSEAD. Terms of Use.
| Domain | Definition |
Physics | A measurement of the topological "tangledness" of magnetic field lines. It is formally defined as the scalar product of the magnetic vector potential with the magnetic field, K = A dot B. If the plasma is perfectly conducting, then helicity is a conserved quantity. (Without resistance, field lines cannot reconnect, and magnetic topology is conserved, so helicity is conserved). (See frozen-in flow). If the plasma has a small amount of resistivity, then Helicity is not exactly conserved. However, the total helicity inside of a given flux surface is often conserved to a good approximation. In that case, the dynamics of a plasma can be analyzed as an evolution toward a minimum energy state subject to the constraint of a conserved total helicity. This is often used in analyzing the equilibrium and relaxation of RFP's and other toroidal devices. - from John Cobb. (references) |
Weather | A property of a moving fluid which represents the potential for helical flow (i.e. flow which follows the pattern of a corkscrew) to evolve. Helicity is proportional to the strength of the flow, the amount of vertical wind shear, and the amount of turning in the flow (i.e. vorticity). Atmospheric helicity is computed from the vertical wind profile in the lower part of the atmosphere (usually from the surface up to 3 km), and is measured relative to storm motion. Higher values of helicity (generally, around 150 m2/s2 or more) favor the development of mid-level rotation (i.e. mesocyclones). Extreme values can exceed 600 m2/s2. (references) |
Source: compiled by the editor from various references; see credits. | |
Crosswords: HELICITY |
| Specialty definitions using "HELICITY": Energy Helicity Index ♦ Magnetic Reconnection ♦ Storm-relative. (references) |
| Domain | Title |
Books | |
Source: compiled by the editor from various references; see credits. | |
| The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com. |
| Expression | Frequency per Day |
helicity | 2 |
| Source: compiled by the editor from various references; see credits. | |
Scrabble® Enable2K-Verified Anagrams | |
| Words within the letters "c-e-h-i-i-l-t-y" | |
-1 letter: ethylic, itchily, lecythi, techily. | |
-2 letters: elicit, litchi, lithic. | |
-3 letters: chiel, chile, chili, chyle, ethic, ethyl, icily, itchy, letch, lichi, licht, licit, lithe, lytic, techy, telic. | |
-4 letters: ceil, celt, chit, cite, city, clit, elhi, etch, etic, heil, hili, hilt, hyte, itch, lech, lice, lich, lite, they, tile, yech, yeti. | |
-5 letters: cel, chi, eth, het, hey, hic. | |
| Words containing the letters "c-e-h-i-i-l-t-y" | |
+2 letters: diphyletic, ethicality. | |
+4 letters: bewitchingly, hieratically, inchoatively, leachability, lysolecithin, polytheistic, technicality, theistically. | |
+5 letters: atheistically, changeability, cholecystitis, detachability, epiphytically, heuristically, hypercritical, ichthyologies, lysolecithins, physicalities, theatricality. | |
| Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. | |
Hexadecimal (or equivalents, 770AD-1900s) (references)48 45 4C 49 43 49 54 59 |
| Leonardo da Vinci (1452-1519; backwards) (references)
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| American Sign Language (origins from 1620-1817 in Italy and, especially, France) (references)
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| Semaphore (1791, in France) (references)
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| Braille (1829, in France) (references)
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Morse Code (1836) (references).... . .-.. .. -.-. .. - -.--. |
| Dancing Men (Sir Arthur Conan Doyle, 1903) (references)
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Binary Code (1918-1938, probably earlier) (references)01001000 01000101 01001100 01001001 01000011 01001001 01010100 01011001 |
HTML Code (1990) (references)H E L I C I T Y |
ISO 10646 (1991-1993) (references)0048 0045 004C 0049 0043 0049 0054 0059 |
| British Sign Language (Fingerspelling, BSL; 1992, British Deaf Association Dictionary of British Sign Language) (references)
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Encryption (beginner's substitution cypher): (references)4239464337435459 |
| 1. Crosswords 2. Usage: Commercial 3. Expressions: Internet 4. Anagrams | 5. Orthography 6. Bibliography |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
