persistence (redirected from persistency)

persistence

(1) In a CRT, the time a phosphor dot remains illuminated after being energized. Long-persistence phosphors reduce flicker, but generate ghost-like images that linger on screen for a fraction of a second.

(2) In object technology, the storage of an object on a disk or other permanent storage device. See persistent data and persistent name.

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persistence [pər′sis·təns]

(electronics)

A measure of the length of time that the screen of a cathode-ray tube remains luminescent after excitation is removed; ranges from 1 for short persistence to 7 for long persistence.

A faint luminosity displayed by certain gases for some time after the passage of an electric discharge.

(meteorology)

With respect to the long-term nature of the wind at a given location, the ratio of the magnitude of the mean wind vector to the average speed of the wind without regard to direction. Also known as constancy; steadiness.

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1.	(programming)	persistence - A property of a programming language where created objects and variables continue to exist and retain their values between runs of the program.
2.	(hardware)	persistence - The length of time a phosphor dot on the screen of a cathode ray tube will remain illuminated after it has been energised by the electron beam. Long-persistence phosphors reduce flicker, but generate ghost-like images that linger on screen for a fraction of a second.