STMD has been refined by the BU group, and applied to several systems by them and others. It was recognized by D. Stelter that despite our emphasis on working with intensive quantities, l n ( f ) is extensive. However δ δ f = ( l n ( f ) / 2 Δ Δ E ) is intensive, and the procedure f → → f based on histogram flatness is replaced by cutting δ δ f in half every fixed number of time steps. This simple change makes STMD entirely intensive and substantially improves performance for large systems. Furthermore, the final value of the intensive δ δ f is a constant that determines the magnitude of error in the converged T ( E ) , and is independent of system size. STMD is implemented in LAMMPS as fix stmd.