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Data Data are representations (encodings) of information using symbols or signals (eg letters, numeric or alphanumeric codes etc) on a medium that they can be kept (eg stone,papyrus, paper, magnetic medium). cuneiform writing hieroglyphs writing demotic writing incunabula Gutenberg print Old scientific journal digital scientific journal Information and knowledge ã One may define information as a form of communication (as a service that puts someone informed with a situation). ã Informatio
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  Data Data are representations (encodings) of information using symbols or signals (eg letters,numeric or alphanumeric codes etc) on a medium that they can be kept (egstone,papyrus, paper, magnetic medium).cuneiform writinghieroglyphs writingdemotic writingincunabulaGutenberg printOld scientific journaldigital scientific journal  Information and knowledge ãOne may define information as a form ofcommunication (as a service that putssomeone informed with a situation).ãInformation is a form of communicationlikely to generate knowledge . Rosetta Stone (the first translation service  ) + Jean-Francois Champollion Khufu (Kheops) cartouchehieroglyphs writing  Information theory ãClaude E. Shannon , A Mathematical Theory of Communication , Bell SystemTechnical Journal, vol. 27, pp. 379-423, 623-656, July, October, 1948 Information theory is a branch of applied mathematics and electricalengineering involving the quantification of information Shannon's article laid out the basic elements of communication:ãAn information source that produces a messageãA transmitter that operates on the message to create a signalwhich can be sent through a channelãA channel, which is the medium over which the signal, carrying theinformation that composes the message, is sentãA receiver, which transforms the signal back into the messageintended for deliveryãA destination, which can be a person or a machine, for whom orwhich the message is intended (and “understand” it) Application: communications (GSM, Wi-Fi etc), various sciences  Shannon’s definition of information ã Information is equivalent to raising the indeterminacy e.g. Blood types
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