Curl


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curl

Maths a vector quantity associated with a vector field that is the vector product of the operator ∇ and a vector function A, where ∇ = i∂/∂x + j∂/∂by + k∂/∂z, i, j, and k being unit vectors. Usually written curl A, rot A

Curl

 

of a vector field A, the vector characteristic of a “rotating component” of field A. The curl is represented by the symbol rot A. It can be interpreted in the following manner: Let A be the velocity field of a fluid flow. At a given point of the flow we place a small wheel with blades and orient its axis in the direction of rot A at that point. Then the angular velocity of the wheel’s rotation from the action of the current will be maximum, and its value will equal (| rot A |)/2. If the field A has the coordinates P(x, y, z), Q(x, y, z), and R(x, y, z), then the curl has the coordinates

E. G. POZNIAK

curl

[kərl]
(forestry)
A block of timber cut from a crotch for cutting into veneers.
(materials)
A defect of paper caused by unequal alteration in the dimensions of the top and underside of the sheet.
(mathematics)
The curl of a vector function is a vector which is formally the cross product of the del operator and the vector. Also known as rotation (rot).

curl

A winding, swirling, or circling in the grain of wood, usually obtained from the crotch or fork of a tree; also see fiddleback.

Curl

(1) A programming environment for developing rich Internet applications (RIAs) from Curl, Inc., Cambridge, MA (www.curl.com). Conceived at MIT, Curl combines HTML markup with an object-oriented programming language. The user's machine requires the Curl runtime engine and browser plug-in for execution. The first Curl implementation was released in 2002. See RIA.

(2) (cURL) A command line utility for executing functions with URL-oriented protocols such as FTP and HTTP. Pronounced "C-URL," there are versions for Unix, Linux, Windows, Mac and other operating systems. For more information, visit http://curl.haxx.se.
References in periodicals archive ?
While curls may look amazing, those born with them often complain they're a nightmare to look after.
Pumps: A total of four pumps are used--two in the front of the curl and two in the back--each from a distance of 8".
In addition, maintenance work is unnecessary because Curl automatically uploades upgrades versions into the system.
If the offense presents a formation with two outside receivers split wide, with the outside LB (Bandit or Will) may be stretched to get to the curl zone.
It has two heat settings, one for fine hair or loose curls and the other for thicker hair or tighter curls.
Curl was a former partner with Coopers & Lybrand accounting firm.
Curl CL, Fenske RA, Kissel JC, Shirai JH, Moate TF, Griffith W, et al.
Curl Corporation, developers of the industry's first rich client software suite to deliver Web-distributed enterprise applications, has announced the joint development and release of CipherCraft/Curl in partnership with NTT Software, which will allow greater improvement of security features within development environments.
Curl problems are a complex interaction of furnish properties, sheet formation, drying conditions, and printing conditions.