The largest circles represent subjects found in Electronic Theses and Dissertation (ETD) descriptions from 2003-2012. The circles within the subjects represent the colleges associated with the ETDs having those subjects. The circles within the colleges are departmentsts, and finally, inside the departments are the years in which the subject found. The size of the "years" circle corresponds to how many subjects were found in that year, in that department, in that college. Therefore, the size of the subject circles reflect the instances of subject found in ETD descriptions from 2003-2012.
Instructions: Hover over the circle to highlight. Click on the circle to zoom in then out.