  This paper verifies two laws for plastic flows of face-centered cubic
crystals that deform at constant strain rates and fixed ambient temperatures.
The first law relates steady-state flow stress to ambient temperature and
strain rate. The second law requires an increase of configurational entropy
towards a maximum reached in the steady state. The large scale least squares
analysis is provided which allows the physics-based parameters of thermodynamic
dislocation theory to be identified in accordance with these laws.
