sune lehmann

Author: Sune Lehmann

  • Visualizing Link Communities

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    Sune Lehmann
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    When YY Ahn, Jim Bagrow, and I published our paper on communities of links in complex networks, we did share the code for the algorithm, but one of the essentials missing from our package was a good way to visualize the highly overlapping link communities. Thus, I’m delighted to report that Rob Spencer over at Scaled…

  • Twittermood 2: Election special

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    Sune Lehmann
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    The midterm elections are coming up, so we decided to create our own little twitter mood election center. “Twitter has grown to become an important aspect of public debate and leading up to Tuesday’s midterms, the Twitterverse is abuzz with conversations on the topics that will decide the individual races. It is well known that…

  • The end of Supporting Material?

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    Sune Lehmann
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    Maybe this is how it happens: You see an interesting (seemingly innocuous) paper and decide to read it. Upon finding it very information-dense, you decide to take a look at the supporting information (SI) and notice that the SI has a word count greater in size than an average PhD thesis. Or maybe it’s when…

  • Bipartite Network gets a Makeover

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    Sune Lehmann
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    I guess my research is slowly changing focus and is more and more about some kind of data science (although I still bill myself as a physicist turned network scientist). While statistics and mathematical models are still driving this type of research, an increasingly important part of data science is visualization – finding neat ways…

  • Worlds Colliding. Part II

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    Sune Lehmann
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    Back in March, I wrote a post entitled Worlds Colliding explaining the failure of Google Buzz as a failure to understand the fundamental structure of complex networks. Buzz received a large amount of criticism for automatically adding the most contacted people from your inbox to your Buzz follower list. My post explained that because individuals…

  • Mood, twitter, and the new shape of America

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    Sune Lehmann
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    Twitter is a gigantic repository for our collective state of mind. Every second, thousands of tweets reveal what everybody and their mother had for lunch, what Justin Bieber is up to, or what magnificent link you should be checking out right now. Individually, each tweet is mostly interesting to friends/fans of the tweeter, but taken…

  • Erdös Number

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    Sune Lehmann
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    The scientific version of the Bacon number is the Erdös number. Via a post on Finn Nielsen’s blog, I learned that i have a reasonably low Erdös number – three. (I also learned that Finn is one of the few people with a finite Erdös-Bacon number). The reason for both Finn’s and my own low…

  • Pervasive Overlap

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    Sune Lehmann
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    Just recently, I came across the following video showing LinkedIn chief scientist DJ Patil explaining the egocentric networks (networks consisting of an individual and their immediate friends) for a few individuals based on their LinkedIn connections. Although the individuals in the center of these egocentric networks are unusual (in the sense that they have many…

  • An animation

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    Sune Lehmann
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    A couple of days ago, David Lazer asked me to help him generate an animation of the spread of MFN (trade) treaties in the 1860s. His resulting post on The emergence of international order: The case of MFN treaties in the 1860’s is worth a read! Also, David’s post sparked a nice follow up blog…

  • Starting a real page

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    Sune Lehmann
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    I wanted to start a real page, to upgrade from my somewhat one-dimensional page over on www.imm.dtu.dk/~slj. As you can probably see, I’m far from done, but I will be updating the site and posting more in the following few days/weeks.