The information entropy, often just entropy, is a basic quantity in information theory associated to any random variable, which can be interpreted as the average level of information, surprise, or uncertainty inherent in the variables possible outcomes. The concept of information entropy was introduced by claude shannon in his 1948 paper a mathematical theory of communication. The shannon entropy of a probability measure, as a very useful mechanism of characterizing information contents, has been applied in diverse fields such as data mining problems, particularly the. Files are available under licenses specified on their description page. Feb 22, 2018 for the love of physics walter lewin may 16, 2011 duration. However, the concept of shanon entropy shares some intuition with boltzmanns. Shannon entropy this chapter is a digression in information theory. Entropia, a music album by the swedish progressive metal band, pain of salvation entropa, a satirical art installation depicting member countries of the european union.
When industrial civilisation collapsed in the third decade of the 21st cent. Aftab et alii, information theory after shannons 1948 work, pp. Entropia universe formerly known as project entropia, a popular mmorpgstyle online virtual universe entropia, inc. Consider a simple digital circuit which has a twobit input x, y and a twobit output x and y, x or y. This is a fascinating subject, which arose once the notion of information got precise and quantifyable. Shannon introduction t he recent development of various methods of modulation such as pcm and ppm which exchange bandwidth for signaltonoise ratio has intensi.
All structured data from the file and property namespaces is available under the creative commons cc0 license. A teoria matematica da informacao estuda a quantificacao, armazenamento e comunicacao da informacao. From a physical point of view, information theory has nothing to do with physics. Teoria da informacao wikipedia, a enciclopedia livre.
For the love of physics walter lewin may 16, 2011 duration. O tempo acaba o ano, o mes e a hora, a forca, a arte, a manha, a fortaleza. Feb 25, 2020 shannon entropy h is given by the formula. Life beyond industrial civilisation by samuel alexander.
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