Screening
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2008-06-15T09:17:53Z
WuBot
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robot Removing: [[no:Screening]]
{{Wiktionary}}
'''Screening''', in general, is the investigation of a great number of something (for instance, people) looking for those with a particular problem or feature. One example is at an airport, where many bags get x-rayed to try to detect any which may contain weapons or explosives. People are also screened going through a metal detector. Even though the procedure aims at a large number of screens, it is always equivalent to [[Sampling (statistics)|sampling in statistics]], because the complete population is almost always inaccessible for screening.
'''Screening''' has other, more specific meanings:
* [[Screening (printing)]], a process that represents lighter shades as tiny dots, rather than solid areas, of ink
* [[Electric field screening]], in physics, the dampening of an electric field by mobile charges
* In atomic physics and chemistry, screening effect refers to the observation that electronic properties of atoms are better described if atoms had a lower [[effective nuclear charge]] than that would be otherwise expected from the number of protons present
* [[Screening (economics)]]
* [[Screening (medicine)]]
* [[Film screening]], the display of a film in a movie theatre or screening room, for some special purpose such as testing or critical review
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