zone(redirected from hypnogenic zone)
Also found in: Dictionary, Thesaurus, Medical, Financial.
zone[Gr.,=girdle], in geography, area with a certain physical and/or cultural unity that distinguishes it from other areas. The division of the earth into five climatic zones probably originated (5th cent. B.C.) with Parmenides, who recognized a torrid zone (see tropicstropics,
also called tropical zone or torrid zone, all the land and water of the earth situated between the Tropic of Cancer at lat. 23 1-2°N and the Tropic of Capricorn at lat. 23 1-2°S.
..... Click the link for more information. ) and north and south temperate zones and postulated north and south frigid (or arctic) zones; his classification was adopted by Aristotle and is still in use. The zones are based on latitude: the torrid zone lies between 23 1-2°N and 23 1-2°S, the temperate zones between these parallels and the polar circles (66 1-2° N and S), and the frigid zones from the polar circles to the poles. Later geographers, recognizing that climate is affected by such conditions as altitude, distance from water, prevailing winds, and ocean currents, have used other bases for zoning. Most geographers today recognize five major climatic groups, based mainly on the work of the German meteorologist Wladimir Köppen. Two of these groups—the rainy tropics and the dry tropics, which encompass four different climates—together correspond roughly to the former torrid zone. Two humid climate groups of the Köppen system, encompassing six climates, together correspond roughly to the former temperate zones. Köppen's two polar climates correspond roughly to the two former frigid zones. In addition to the five groups encompassing twelve climates, geographers also recognize a series of highland zones where many of the other climates of the world are duplicated. Geographic zones in which people have similar patterns of life are called culture zones or areas (see cultureculture,
in anthropology, the integrated system of socially acquired values, beliefs, and rules of conduct which delimit the range of accepted behaviors in any given society. Cultural differences distinguish societies from one another.
..... Click the link for more information. ). An example would be the plains area of North America.
zoneany area, especially within a town or city, possessing particular functions or characteristics. The occurrence of zones may be planned as well as unplanned (e.g. the zoning of school attendance, planning restrictions on industrial or commercial development). See also ZONE OF TRANSITION, URBAN ECOLOGY.
in music, the region within which the physical, quantitative characteristics of a tone (frequency of vibration, structure, intensity, and length) may change without there being, from the listening point of view, changes in the qualities of the given tone. In particular, to each step of the music scale (C, C sharp, D, and so on) there corresponds not one frequency, as in a mathematically expressed pitch, but a whole range or region of closely located frequencies. For example, the tone A of the first octave can have not only 440 vibrations per second, but any number within a range of approximately 435 to 445. These regions of frequencies are called tonal-pitch zones.
The theory of the zonal nature of tonal-pitch hearing has made possible new ways of studying the interpretations given to musical compositions by vocalists and musicians who play instruments (the violin and related stringed instruments) that permit freedom of intoning. There are also zones in tempo, rhythm, timbre, and dynamics. N. A. Garbuzov, the Soviet specialist in music acoustics, developed the theory of zones in the 1940’s and 1950’s.
REFERENCESGarbuzov, N. A.Zonnaia priroda zvukovysotnogo slukha. Moscow-Leningrad, 1948.
Garbuzov, N. A.Zonnaia priroda tempo i ritma. Moscow, 1950.
Garbuzov, N.A. Zonnaia priroda dinamicheskogo slukha. Moscow, 1955.
Garbuzov, N. A.Zonnaia priroda tembrovogo slukha. Moscow, 1956.
IU. N. RAGS
What does it mean when you dream about a zone?
To experience being in a zone may relate to a war zone or a demilitarized zone. A place or an area with designated boundaries and points of protection. This dream could indicate one is involved in too much daily activity and needs to find a neutral place to recover a sense of physical or emotional equilibrium.
zone(1) An administrative unit defined in a DNS server. It may refer to a single domain name or a subdomain. See zone file, DNS records and DNS.
(2) A logical subnet in a Fibre Channel SAN network. Zones tie together groups of servers and storage devices for daily processing, but can be dynamically changed as required. For example, in order to enable periodic backups to storage devices outside the individual zones, the zones can be widened on the fly to reach them. See Fibre Channel.
(3) The term can be used for any subdivision of hardware and/or software.