free html hit counter New Scientist: Google News Changes Afoot? - John Battelle's Search Blog
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  1. wet89wet says:

    “In this paper, we introduce this problem by proposing a ranking framework which models: (1) the process of generation of a stream of news articles, (2)
    the news articles clustering by topics, and (3) the evolution of news story over the time. The ranking algorithm proposed ranks news information, finding the most authoritative news sources and identifying the most interesting events in the different categories to which news article belongs. All these ranking measures take in account the time and can be obtained without a predefined sliding window of observation over the stream. The complexity of our algorithm is linear
    in the number of pieces of news still under consideration at the time of a new posting. This allow a continuous on-line process of ranking.”