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  2. Cottrell equation - Wikipedia

    en.wikipedia.org/wiki/Cottrell_equation

    At long time scales, buildup of the diffusion layer causes a shift from a linearly dominated to a radially dominated diffusion regime, which causes another deviation from linearity. In practice, the Cottrell equation simplifies to i = k t − 1 / 2 , {\displaystyle i=kt^{-1/2},} where k is the collection of constants for a given system ( n, F ...

  3. Help:Conditional expressions - Wikipedia

    en.wikipedia.org/wiki/Help:Conditional_expressions

    To make comparisons based on dates (e.g., if the current date and time is after some other date and time), first convert the time(s) to the number of seconds after January 1, 1970, using the function {{#time: U }}, then compare (or add, subtract, etc.) those numerical values.

  4. Temporal database - Wikipedia

    en.wikipedia.org/wiki/Temporal_database

    The valid time and transaction time do not have to be the same for a single fact. For example, consider a temporal database storing data about the 18th century. The valid time of these facts is somewhere between 1701 and 1800. The transaction time would show when the facts were inserted into the database (for example 1998-01-21).

  5. Valid time - Wikipedia

    en.wikipedia.org/wiki/Valid_time

    The valid-time period is an interval based on event times, which are referred to as event datetime in data vault. [1] [2] Other names are application-time period [1] or real-world timeline. [1] SQL:2011 supports valid time through so-called application time-period tables.

  6. call-with-current-continuation - Wikipedia

    en.wikipedia.org/wiki/Call-with-current-continuation

    Every time the loop is about to process another item from the list, the function grabs the current continuation, and assigns it to the variable 'control-state'. This variable initially is the closure that iterates through all elements of the list. As the computation progresses, it becomes a closure that iterates through a suffix of the given list.

  7. Linear temporal logic - Wikipedia

    en.wikipedia.org/wiki/Linear_temporal_logic

    In logic, linear temporal logic or linear-time temporal logic [1] [2] (LTL) is a modal temporal logic with modalities referring to time. In LTL, one can encode formulae about the future of paths , e.g., a condition will eventually be true, a condition will be true until another fact becomes true, etc.

  8. Frequency-locked loop - Wikipedia

    en.wikipedia.org/wiki/Frequency-locked_loop

    This circuit compares the frequency of a controlled oscillator to the reference, automatically raising or lowering the frequency of the oscillator until its frequency (but not necessarily its phase) is matched to that of the reference. A frequency-locked loop is an example of a control system using negative feedback. Frequency-lock loops are ...

  9. Infinite loop - Wikipedia

    en.wikipedia.org/wiki/Infinite_loop

    An infinite loop is a sequence of instructions in a computer program which loops endlessly, either due to the loop having no terminating condition, [4] having one that can never be met, or one that causes the loop to start over.

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