What word beginning with a 'P' means 'noticeable and recognizable'?
Just-noticeable difference Just-noticeable difference In the branch of experimental psychology focused on sense, sensation, and perception, which is called psychophysics, a just-noticeable difference or JND is the amount something must be changed in order for a difference to be noticeable, detectable at least half the time (absolute threshold). This limen is also known as the difference limen, differential threshold, or least perceptible difference. For many sensory modalities, over a wide range of stimulus magnitudes sufficiently far from the upper and lower limits of perception, the 'JND' is a fixed proportion of the reference sensory level, and so the ratio of the JND/reference
Recognizable set means that there exists a subset formula_8 of formula_3 (not necessarily a submonoid of formula_3) such that the image of formula_11 is in formula_8 and the image of formula_13 is in formula_14. Let formula_15 be an alphabet: the set formula_16 of words over formula_15 is a monoid, the free monoid on formula_15. The recognizable subsets of formula_16 are precisely the regular languages. Indeed, such a language is recognized by the transition monoid of any automaton that recognizes the language. The recognizable subsets of formula_20 are the ultimately periodic sets of integers. A subset of formula_1 is recognizable if and only