Neurofibromatosis may be recognized in childhood, though it is unusual for the full syndrome to be present at an early age. Thus skin pigmentation may be the only manifestation in infancy, later to be followed by the development of skin tumours, skeletal and other abnormalities. The following case of neurofibromatosis is of interest in that it occurred in a newborn infant who presented with ski...

Using density-functional calculations, we obtain the ~001! biaxial strain dependence of the valence and conduction band energies of GaN, GaP, GaAs, InN, InP, and InAs. The results are fit to a convenient-to-use polynomial and the fits provided in tabular form. Using the calculated biaxial deformation potentials in large supercell empirical pseudopotential calculations, we demonstrate that epita...