If you're not following along with the great work RDTN is doing to create networks of radiation sensors, check out just one of their projects: iGeigie, a geiger counter that plugs into your iPhone.
After a tsunami caused a nuclear disaster in Japan, a radiation detection network starting aggregating and publishing data. The result, Safecast, shows how citizen science and open data are changing our understanding of the world.
S. Chawla, J. Hartline, и B. Sivan. (2011)cite arxiv:1111.2893
Comment: The paper has 17 pages and 1 figure. It is to appear in the
proceedings of ACM-SIAM Symposium on Discrete Algorithms 2012.