The Bain transformation bcc ~ fcc can be achieved by the two homogeneous « shears » E and E’ proposed by Bogers and Burgers. We first discuss the conditions for pair potentials to ensure the mechanical stability of both bcc and fcc structures; then, three phenomenological potentials for metals are used to calculate the crystal free energy density W for the deformation states 03B3E + 03B3’ E’ (0...

Saturn has an intense and broad eastward equatorial jet with a complex three-dimensional structure mixed with time variability. The equatorial region experiences strong seasonal insolation variations enhanced by ring shadowing, and three of the six known giant planetary-scale storms have developed in it. These factors make Saturn's equator a natural laboratory to test models of jets in giant pl...

SUMMARY A significant aesthetic disadvantage to split skin grafts is the obvious transition between the graft and the normal skin. We report on a novel method to interrupt this transition point by using pinking shears, which are dressmaking scissors with saw-toothed blades that create a chevron pattern instead of a straight edge. We describe a case where the pinking shears were utilized on a sp...