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Graphity is a data base index that enables retrieval of several thousand
dynamically generated temporal orderd news feeds in social networks with
millions of users (i.e. Facebook, Twitter). Might be a cool technology to build your next app around.
You can find more information on http://www.rene-pickhardt.de/graphity-an-efficient-graph-model-for-retrieving-the-top-k-news-feeds-for-users-in-social-networks/
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