In biology, regeneration is the ability to recreate lost or damaged tissues, organs and limbs.
In telecommunication, the term regeneration has the following meanings:
In a regenerative repeater, the process by which digital signals are amplified, reshaped, retimed, and retransmitted. A synonym for this meaning is "positive feedback".
In a storage or display device, the restoration of stored or displayed data that have deteriorated. For example, conventional cathode ray tube displays must be continually regenerated for the data to remain displayed.
In computer graphics, the sequence of events needed to generate a display image from its representation in storage.
the Doctor Whomythology, possibly the most famous association. When the role's original actor William Hartnell left the series due to decreasing health, rather than replace him with a lookalike, it was decided to introduce the idea that the Doctor has a certain number of lives, thus the extreme contrasts between the various actors playing the role. There have already been eight actors to play the role with a ninth one on the way and the show's mythology allows for twelve regenerations for a total of 13 Doctors.
the Star Trek series, where species like the Changelings and the Borg regularly need to enter a process of regeneration in order to be able to function.
In Stirling engines, regeneration is the cycling of heat between the working gas and the regenerator, typically a mass of metal fiber.
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