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  2. Imaginary time - Wikipedia

    en.wikipedia.org/wiki/Imaginary_time

    Imaginary time is a mathematical representation of time that appears in some approaches to special relativity and quantum mechanics. It finds uses in certain cosmological theories. Mathematically, imaginary time is real time which has undergone a Wick rotation so that its coordinates are multiplied by the imaginary unit i .

  3. Help:Using the Wayback Machine - Wikipedia

    en.wikipedia.org/wiki/Help:Using_the_Wayback_Machine

    To find the archive of google.com close to 2008-08-08 08:08 UTC (8th of August, 2008 and 8 minutes past the 8th hour UTC time) use the following command. You may omit the flags you don't care about. Wayback Machine timestamps are UTC time.

  4. Doubling time - Wikipedia

    en.wikipedia.org/wiki/Doubling_time

    The equivalent concept to doubling time for a material undergoing a constant negative relative growth rate or exponential decay is the half-life. The equivalent concept in base- e is e -folding . Graphs comparing doubling times and half lives of exponential growths (bold lines) and decay (faint lines), and their 70/ t and 72/ t approximations.

  5. Wikipedia:List of web archives on Wikipedia - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:List_of_web...

    The Wayback Machine is about 80% of the total. ... Uses &date=2012-06-01+21:40:03 in query?url ; the short ID is base62 which converts to unix time; Examples:

  6. Wayback Machine - Wikipedia

    en.wikipedia.org/wiki/Wayback_Machine

    The name "Wayback Machine" is a reference to a fictional time-traveling device in the animated cartoon The Adventures of Rocky and Bullwinkle and Friends from the 1960s. [ 12 ] [ 13 ] [ 14 ] In a segment of the cartoon entitled "Peabody's Improbable History", the characters Mister Peabody and Sherman use the " Wayback Machine " to travel back ...

  7. List of Web archiving initiatives - Wikipedia

    en.wikipedia.org/wiki/List_of_Web_archiving...

    1 crawl engineer, 1 software developer, and 9 collection specialists, all part-time (equivalent to around 4 full-time). The KB selectively collects Dutch sites of research and cultural value. National Library of Latvia [45] Latvia: 2005 Web Curator Tool and Wayback: 1 Currently only storing for preservation, access to public in development (ETA ...

  8. Time travel - Wikipedia

    en.wikipedia.org/wiki/Time_travel

    The first page of The Time Machine published by Heinemann. Time travel is the hypothetical activity of traveling into the past or future. Time travel is a concept in philosophy and fiction, particularly science fiction. In fiction, time travel is typically achieved through the use of a device known as a time machine. The idea of a time machine ...

  9. Time in physics - Wikipedia

    en.wikipedia.org/wiki/Time_in_physics

    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]