Assistant Professor
School of Informatics and Computing
Indiana University Bloomington

Informatics East, Rm 316
919 E 10th Street, Bloomington, IN 47408

Email: yyahn at indiana dot edu
Phone: +1 812 856 2920
Office hour: Tuesday & Thursday 1-2:30pm
Book an appointment: http://doodle.com/yyahn
(be sure to check the timezone setting)
twitter: @yy

My CV containing the full publication list is here.

Bio

I am an assistant professor at Indiana University School of Informatics and Computing. I was a postdoctoral researcher at the Center for Complex Network Research at Northeastern University and a visiting researcher at the Center for Cancer Systems Biology at Dana-Farber Cancer Institute from June 2008 till May 2011. My post-doctoral advisor was Albert-László Barabási. I received my Ph.D. from Physics Department at KAIST in early 2008. My advisor was Hawoong Jeong.

I am interested in the structure and dynamics of complex systems, such as society and living organisms. So, I usually play with massive datasets and muse on the hidden patterns. My recent work covers several area such as the hierarchical & modular structure in social and biological networks (e.g. Nature 466, 761-764, 2010, Science 333, 601, 2011 ), the analysis of metabolic networks (e.g. PNAS 107, 1082-1087, 2010), social media (e.g. twitter – pulse of the nation), and food (Sci. Rep. 1, 196, 2011).

Please visit my publication page or Google scholar profile for the more details on my publications.

Updates

• Feb. 7, 2012: Our paper “Flavor network and the principles of food pairing” was the most downloaded (more than 116,000 times) paper on all of nature.com in December 2011, including Nature and all other Nature-branded journals.
• Jan. 25, 2012: I was selected as one of the two winners of 2012 OYRA (Outstanding Young Researcher Award) by AKPA (Association of Korean Physicists in American).

Selected Works

1. Flavor network and the principles of food pairing
   Y.-Y. Ahn, S. Ahnert, J. P. Bagrow, and A.-L. Barabási
   Scientific Reports 1, 196 (2011) [link] [arXiv] [poster]
   [Nature News] [Technology Review] and [more]
   

2. Evidence for Network Evolution in an Arabidopsis Interactome Map
   Arabidopsis Interactome Mapping Consortium
   Science 333, 601 (2011) [Link]
   

3. Link communities reveal multiscale complexity in networks
   Y.-Y. Ahn, J. P. Bagrow, and S. Lehmann
   Nature 466, 761 (2010). [Link] [arXiv] [source codes & visualization] [Talk slides]
   [news@Northeastern] [한겨레 사이언스온]
   

4. Pulse of the Nation: visualizing the mood of twitter
   A. Mislove, S. Lehmann, Y.-Y. Ahn, J.-P. Onnela, J. N. Rosenquist
   [Project page] [YouTube]
   [Slashdot] [NewScientist] [CBS] [BBC] [NYTimes] [and more]
   

5. A blueprint for antimicrobial hit discovery targeting metabolic networks
   Y. Shen, J. Liu, G. Estiu, B. Isin, Y.-Y. Ahn, D.-S. Lee, A.-L. Barabási, V. Kapatral, O. Wiest, and Z. N. Oltvai
   PNAS 107, 1082 (2010). [Link]

6. Analysis of Topological Characteristics of Huge Online Social Networking Services
   Y.-Y. Ahn, S. Han, H. Kwak, S. Moon, and H. Jeong
   WWW2007 – In Proceedings of International World Wide Web Conference, 2007 [PDF] [Updated & corredted PDF] [Data]