Screening
From Wikipedia, the free encyclopedia
 |
Look up screening in Wiktionary, the free dictionary. |
One meaning of screening is the investigation of a great number of something (for instance, people) looking for those with a particular problem or feature. For example at an airport many bags are screened by x-ray to try to detect any which may contain weapons or explosives, and people are screened by passing through a metal detector. If only part of a population is screened, screening is equivalent to sampling in statistics.
Important cases of screening include:
Screening can also mean preventing access of something by some sort of barrier. Particular cases:
- Electromagnetic shielding in physics, the exclusion of electric, magnetic, or electromagnetic fields by a metallic screen or shield
- In atomic physics and chemistry, the screening effect or atomic shielding is the reduction of effective nuclear charge by intervening electron shells
- Screening (printing), a process that represents lighter shades as tiny dots, rather than solid areas, of ink by passing ink through a perforated screen
- The investigation of a large population is related; the members of a population are filtered by a metaphorical, rather than physical, screen
- Screening is a process stage when cleaning paper pulp
Other uses:
- Film screening, showing a film by projection onto a screen
 |
This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article. |
