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A sequence of events is isochronous if the events occur regularly, or at equal time intervals. The term isochronous is used in several technical contexts, but usually refers to the primary subject maintaining a constant period or interval (the reciprocal of frequency), despite variations in other measurable factors in the same system.
The specious present is the time duration wherein a state of consciousness is experienced as being in the present. [11] The term was first introduced by the philosopher E. R. Clay in 1882 (E. Robert Kelly), [12] [13] and was further developed by William James. [13]
Time is the continuous progression of existence that occurs in an apparently irreversible succession from the past, through the present, and into the future. [1] [2] [3] It is a component quantity of various measurements used to sequence events, to compare the duration of events (or the intervals between them), and to quantify rates of change of quantities in material reality or in the ...
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Allen's interval algebra is a calculus for temporal reasoning that was introduced by James F. Allen in 1983.. The calculus defines possible relations between time intervals and provides a composition table that can be used as a basis for reasoning about temporal descriptions of events.
In the International System of Units (SI), the unit of time is the second (symbol: s). It has been defined since 1967 as "the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom", and is an SI base unit. [12]
The line is ubiquitous in clocks in the form of a circle, time is spoken of in terms of length, intervals, a before and an after. [3] The idea of orderly, segmented time is also represented in almanacs, calendars, charts, graphs, genealogical and evolutionary trees, where the line is central. [4]
Interval contractor — maps interval to subinterval which still contains the unknown exact answer; Interval propagation — contracting interval domains without removing any value consistent with the constraints See also: Interval boundary element method, Interval finite element; Loss of significance; Numerical error; Numerical stability ...