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From the information-provider point of view, there were huge differences between Viditel and Videotex: Via Viditel all data was normally stored on the central computer(s) owned and managed by KPN: to update the information in the system you connected to the Viditel computer and via a terminal-emulation application you could edit the information.
Viewdata is a Videotex implementation. It is a type of information retrieval service in which a subscriber can access a remote database via a common carrier channel , request data and receive requested data on a video display over a separate channel.
A crossed out statement in the memo discussed the differences between the newspaper business and online information delivery, noting the latter's lower cost of entry, lower profit margins, and likely increased competition. The act of crossing out this statement has been taken as a sign of Knight Ridder's unwillingness to recognize the changes ...
Viewdata in Action : a Comparative Study of Prestel. London: McGraw-Hill. ISBN 978-0-070-84548-0. OCLC 715473323. This multi-authored work covers relations between the interest groups involved in providing a videotex service on Prestel, videotex's impact on the press, editorial issues, economic aspects, and likely technological developments.
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A diff (from the word "difference") is a web page displaying the difference between one version and another of a Wikipedia page.A particular version of a page is called a "revision"; each revision has a date and time of creation which can be seen in the page history.
Temporal difference (TD) learning refers to a class of model-free reinforcement learning methods which learn by bootstrapping from the current estimate of the value function. These methods sample from the environment, like Monte Carlo methods , and perform updates based on current estimates, like dynamic programming methods.