Revision History for USGS Open-File Report 2009-1241 Rajanikanth Jammalamadaka Multilevel Methodology for Simulation of Spatio-Temporal Systems with Heterogeneous Activity; Application to Spread of Valley Fever Fungus ----------------------------------------------------- Posted online November 6, 2009 A dissertation submitted to the faculty of the Department of Electrical and Computer Engineering, in partial fulfillment of the requirements for the degree of Doctor of Philosophy, Graduate College, The University of Arizona, 2008 -----------------------------------------------------