Mapping Change in Large Networks

Rosvall M, Bergstrom CT

PLoS ONE 5(1): e8694. doi:10.1371/journal.pone.0008694, January 27, 2010

“Change is a fundamental ingredient of interaction patterns in biology, technology, the economy, and science itself: Interactions within and between organisms change; transportation patterns by air, land, and sea all change; the global financial flow changes; and the frontiers of scientific research change. Networks and clustering methods have become important tools to comprehend instances of these large-scale structures, but without methods to distinguish between real trends and noisy data, these approaches are not useful for studying how networks change. Only if we can assign significance to the partitioning of single networks can we distinguish meaningful structural changes from random fluctuations. Here we show that bootstrap resampling accompanied by significance clustering provides a solution to this problem. To connect changing structures with the changing function of networks, we highlight and summarize the significant structural changes with alluvial diagrams and realize de Solla Price’s vision of mapping change in science: studying the citation pattern between about 7000 scientific journals over the past decade, we find that neuroscience has transformed from an interdisciplinary specialty to a mature and stand-alone discipline.”

Geospatial Dimensions of Emergency Response Symposium, 25-29 April 2010, Phoenix, Arizona

“The Geospatial Information & Technology Association (GITA) has created this unique forum to address the application of mapping technologies such as GIS, GPS, and remote sensing to emergency and disaster response. In response to a perceived need, GITA held the first ever Geospatial Dimensions of Emergency Response Symposium in Seattle, Washington in March 2008. The response was overwhelmingly positive in 2008 and in Tampa in 2009. In 2010 the symposium will once again bring together the worlds of emergency response and planning and geospatial technology April 25-29 in Phoenix, Arizona.”