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  2. Sunrise equation - Wikipedia

    en.wikipedia.org/wiki/Sunrise_equation

    In the equation given at the beginning, the cosine function on the left side gives results in the range [-1, 1], but the value of the expression on the right side is in the range [,]. An applicable expression for ω ∘ {\displaystyle \omega _{\circ }} in the format of Fortran 90 is as follows:

  3. Equation of time - Wikipedia

    en.wikipedia.org/wiki/Equation_of_time

    Animation showing equation of time and analemma path over one year.. The United States Naval Observatory states "the Equation of Time is the difference apparent solar time minus mean solar time", i.e. if the sun is ahead of the clock the sign is positive, and if the clock is ahead of the sun the sign is negative.

  4. Timed automaton - Wikipedia

    en.wikipedia.org/wiki/Timed_automaton

    This means that each time an is emitted, this clock is reset to zero. Timed automaton accepting the language a* such that a letter is emitted in each open interval of length one. Consider the language L {\displaystyle {\mathcal {L}}} of timed words w {\displaystyle w} over the binary alphabet { a , b } {\displaystyle \{a,b\}} such that each a ...

  5. Longest-processing-time-first scheduling - Wikipedia

    en.wikipedia.org/wiki/Longest-processing-time...

    The same is true for x and y. Therefore, the number of items in T is at least (m-1)+2*(n-m+1) = 2n-m+1 - contradiction. We can assume, without loss of generality, that all inputs are either smaller than 1/3, or at least 1. Proof: Suppose some input x is in (1/3,1). We replace x with 1. This obviously does not decrease the optimal min-sum.

  6. CPU time - Wikipedia

    en.wikipedia.org/wiki/CPU_time

    When a program wants to time its own operation, it can use a function like the POSIX clock() function, which returns the CPU time used by the program. POSIX allows this clock to start at an arbitrary value, so to measure elapsed time, a program calls clock(), does some work, then calls clock() again. [1] The difference is the time needed to do ...

  7. Dynamic time warping - Wikipedia

    en.wikipedia.org/wiki/Dynamic_time_warping

    In time series analysis, dynamic time warping (DTW) is an algorithm for measuring similarity between two temporal sequences, which may vary in speed. For instance, similarities in walking could be detected using DTW, even if one person was walking faster than the other, or if there were accelerations and decelerations during the course of an ...

  8. Clock synchronization - Wikipedia

    en.wikipedia.org/wiki/Clock_synchronization

    The time server maintains its clock by using a radio clock or other accurate time source, then all other computers in the system stay synchronized with it. A time client will maintain its clock by making a procedure call to the time server. Variations of this algorithm make more precise time calculations by factoring in network radio ...

  9. Clock angle problem - Wikipedia

    en.wikipedia.org/wiki/Clock_angle_problem

    The time is usually based on a 12-hour clock. A method to solve such problems is to consider the rate of change of the angle in degrees per minute. The hour hand of a normal 12-hour analogue clock turns 360° in 12 hours (720 minutes) or 0.5° per minute. The minute hand rotates through 360° in 60 minutes or 6° per minute. [1]