background


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background

1. Art
a. the plane or ground in a picture upon which all other planes or forms appear superimposed
b. the parts of a picture that appear most distant
2. Physics low-intensity radiation as, for example, from small amounts of radioisotopes in soil, air, building materials, etc.
3. Electronics
a. unwanted effects, such as noise, occurring in a measuring instrument, electronic device, etc.
b. (as modifier): background interference

background

[′bak‚grau̇nd]
(communications)
Picture white of the facsimile copy being scanned when the picture is black and white only.
Undesired printing in the recorded facsimile copy of the picture being transmitted, resulting in shading of the background area.
Noise heard during radio reception caused by atmospheric interference or the operation of the receiver at such high gain that inherent tube and circuit noises become noticeable.

background

(operating system)
A task running in the background (a background task) is detached from the terminal where it was started (and often running at a lower priority); opposite of foreground. This means that the task's input and output must be from/to files (or other processes).

Nowadays this term is primarily associated with Unix, but it appears to have been first used in this sense on OS/360.

Compare amp off, batch, slopsucker.

background

(jargon)
For a human to do a task "in the background" is to do it whenever foreground matters are not claiming your undivided attention, and "to background" something means to relegate it to a lower priority. "For now, we'll just print a list of nodes and links; I'm working on the graph-printing problem in the background." Note that this implies ongoing activity but at a reduced level or in spare time, in contrast to mainstream "back burner" (which connotes benign neglect until some future resumption of activity). Some people prefer to use the term for processing that they have queued up for their unconscious minds (often a fruitful tack to take upon encountering an obstacle in creative work).

background

(1) The image on screen at all times. See wallpaper.

(2) The non-interactive processing in the computer. See foreground/background.

(3) The base, or backdrop color. In order to distinguish any image on screen, whether text or graphics, there must be a contrasting background color.
References in periodicals archive ?
The government had introduced computerised NICs in 2000 through Nadra which required an applicant's photograph in blue background. The requirement was modified a few years ago and the condition of required background was replaced with white one.
In the next section, we define the class of RTN background risks for HARA utility and illustrate it by a well-known result about dynamic portfolio choice, due to Mossin (1968a).
NetForce Global, www.netforceglobal.com, is the trusted wholesaler of international background screening information in The Americas, Canada, EMEA and the Asia/Pacific regions.
The Chromium team reports to seeing '25 percent fewer busy background tabs' with the update.
In the next section, an overview of existing approaches of background subtraction is presented.
From the last period of 1980s, many simulate studies have been done on marker-assisted introgression, mainly concentrate on background selection (Hillel et al., 1990; Hospital et al., 1992, 1997, 2003; Groen and Smith 1995; Visscher et al., 1996; Chaiwong et al., 2002).
Senate Bill 941, the Oregon Firearm Safety Act, will close the dangerous loophole in Oregon's 25-year-old background check law.
Unfortunately, the impact of these new requirements on the state background checks that appraisers are required to undergo likely will be limited because most states (42) enacted background check requirements prior to the AQB's requirements.
1(b) for comparing conveniently: TR represents target area while B1, B2 and B3 are different background areas.
* Both federal and some state statutes regulate how certain background checks may be conducted.
The main bill from Senate Majority Leader Harry Reid, D-Nev., proposes background check expansion, increased funding for school safety, and tougher penalties for gun traffickers and straw purchasers.