  As a guide to constitutive specification, driving forces for dislocation
velocity and nucleation rates are derived for a field theory of dislocation
mechanics. A condition of closure for the theory in the form of a boundary
condition for dislocation density is also derived. Kinematical features of
dislocation evolution like initiation of bowing of a pinned screw segment, and
initiation of cross-slip of a screw segment are discussed. An exact solution
for the expansion of a polygonal loop as well as representation within the
theory of dislocation level Schmid and non-Schmid behavior, and unloaded
stress-free and steady microstructures are also discussed.
