Archive for December, 2008

  • Absolute zero

    Absolute zero

    Posted on December 27, 2008 | 3 Comments
    In 1702 Guillaume Amontons introduced the concept of absolute zero based on observations of gases. In 1810, Sir John Leslie froze water to ice artificially. The idea of absolute zero was generalised in 1848 by Lord Kelvin. In 1906, Walther Nernst stated the third law...

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  • Vigenère cipher

    Vigenère cipher

    Posted on December 4, 2008 | No Comments
    The Vigenère cipher is a method of encrypting alphabetic text by using a series of different Caesar ciphers based on the letters of a keyword. It is a simple form of polyalphabetic substitution. The Vigenère (pronounced /ˌviːdʒɪˈnɛəɹ/, “veedj-ih-nair” in English; [viʒnɛːʁ] in French) cipher has...

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