. Furthermore, an adjusted EI was calculated by increasing the self-reported EI by 22%, in an attempt to account for the under-reporting that has previously been documented in a comparable sample population [6]. The 22% estimation of under-reporting in Dasa et al. [6] was calculated by...
Eikhoff [4] analyzed the distribution of coal resources and traffic flow in Germany, suggesting ways to sustain railroad network capacity under stringent environmental constraints to accommodate increased coal and iron ore transportation demands. Wang et al. [5] focused on the relationship between ...