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(gäp), city (1990 pop. 35,647), capital of Hautes-Alpes dept., SE France, on the Luye River at the foot of the Dauphiné Alps. A center for tourism, Gap is an agricultural market that manufactures clothing, wood products, and construction materials. Founded by Augustus c.14 B.C., it was the capital of medieval Gapençais, which was annexed to the crown of France in 1512. The city was devastated during the Wars of Religion (16th cent.).
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A region not adequately covered by the main lobes of a radar antenna.
(computer science)
A uniformly magnetized area in a magnetic storage device (tape, disk), used to indicate the end of an area containing information.
The spacing between two electric contacts.
A break in a closed magnetic circuit, containing only air or filled with a nonmagnetic material.
A short region that is missing in one strand of a double-stranded deoxyribonucleic acid.
Any sharp, deep notch in a mountain ridge or between hills.
An opening at the point of closest approach between faces of members in a weld joint.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


An opening, as in a wall; an open joint.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.


i. Any space where the imagery fails to meet the minimum coverage requirements. This might be a space not covered by imagery or one where the minimum specified overlap was not obtained.
ii. Breaks in continuous radar coverage. See gap-filler radar.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved


1. a break in a line of hills or mountains affording a route through
2. Chiefly US a gorge or ravine
3. Electronics
a. a break in a magnetic circuit that increases the inductance and saturation point of the circuit
b. See spark gap
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


(mathematics, tool)
Groups Algorithms and Programming.

A system for symbolic mathematics for computational discrete algebra, especially group theory, by Johannes Meier, Alice Niemeyer, Werner Nickel, and Martin Schonert of Aachen. GAP was designed in 1986 and implemented 1987. Version 2.4 was released in 1988 and version 3.1 in 1992.

Sun version.

["GAP 3.3 Manual, M. Schonert et al, Lehrstuhl D Math, RWTH Aachen, 1993].
This article is provided by FOLDOC - Free Online Dictionary of Computing (


(1) The space between blocks of data on magnetic tape.

(2) The space in a read/write head over which magnetic flux (energy) flows causing the underlying magnetic tape or disk surface to become magnetized in the corresponding direction.
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References in periodicals archive ?
Equality groups have called the figures "worrying" but say a longerterm strategy is needed to ensure that action to close pay levels between men and women follows the requirement to publish the gap.
* Hawaii, in addition, has the lowest gap in business-ownership rates between whites and blacks, at 38.40%.
While the median pay across the economy is 18% in favour of men, the report says new figures reveal some "alarming truths" with gender pay gaps of over 40% not uncommon in some sectors.
Everybody works to make a living, yet, it is not uncommon to look at the salaries of men and women and find a gap between their incomes that is hard to overlook, a phenomenon that has been occurring almost everywhere across the world.
Tree species number: The number of tree species at the edge (S) of each gap was counted and the relationship between gap size and cumulative species number at the gap edges for all gaps surveyed was determined following Muth and Bazzaz (2002).
Troutbeck, "Useful estimation procedures for critical gaps," Transportation Research Part A: Policy and Practice, vol.
* Are the identified gaps meaningful for achieving the organization's objectives?
The different formation stage (Uhl et al., 1988; Spies et al., 1990)and, sizes (Zhang and Zak, 1995; Bouchard et al., 2005;Heitheckerand Halpern 2006;Muscolo et al., 2007;Griffiths et al., 2010) of gaps have various influential and intensive impacts on both the habitats and regeneration of understory plants (e.g., Dirzo et al., 1992; Schumann et al., 2003).Previous studies addressed paid the responses of tree species grown under canopygaps (Frelichand Reich 1995), analyzedand simulatedthe gap dynamics(e.g., Vepakommaet al.,2008),as well as theregeneration characteristics under the gap(Gagnon, et al., 2004; Kukkonenet al.,2008; Prevostand Raymond,2012).
So drag flow over the barrier can be matched to the calculated drag flow of the screw ([Q.sub.D]) for determination of a minimum barrier gap. A simple drag-flow equation for flow between parallel plates ([Q.sub.D] = [V.sub.0] H/2) can be modified to calculate a drag flow ([Q.sub.B]) over the screw barrier.
In comparison of Figures 8(b) and 8(c), it can be found that the band gaps decrease and even disappear when the density of two materials is closer.
First, the air pressure in the air gap is not changed, that is, the velocity of the Z direction is zero.