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User: vigna

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  1. Well, as one of the authors... on 4.74 Degrees of Separation on Facebook · · Score: 2

    ...I made three days ago a submission with the correct number (3.74). /. couldn't care less. On average the degrees are 3.74, and this is why our paper is called "Four degrees of separation". 4.74 is the distance, which is one more than the degrees of separation. Unfortunately sociologists decided to count the "intermediaries" (so if we are friends, our degree of separation is zero), whereas computer scientists count "hops" (so if we are friends, our distance is one). This generated a lot of confusion. But, just to be clear, no, we did not round 4.74 down to 4; we rounded 3.74 up to 4. :)

  2. ERW on ERD Apps a Missing OSS Niche? · · Score: 1

    Maybe you could find useful the stuff we developed for our internal usage: http://erw.dsi.unimi.it .

    There is presently no graphical tool for editing diagrams--you must describe your schema using XML (we are working on graphical tool, but it is still, at best, immature).