The following ar ticle is based on the Outstanding Young Investigator Award presentation given by Ju Li on April 19, 2006, at the Materials Research Society Spring Meeting in San Francisco. Li received the award “for his innovative work on the atomistic and first principles modeling of nanoindentation and ideal strength in revealing the genesis of ma te rials deformation and fracture.” Defect n...

Purpose: To investigate the effect of single session Extracorporeal Shock Wave Therapy (ESWT) over the ankle plantar flexor muscles on the spasticity, muscle architecture, and gait in chronic stroke patients. Methods: This quasi-experimental, single group study had a repeated measures design. A total of 17 post-stroke patients were selected by convenience sampling method, and received 2000 sho...

The effects of turbulent integral length scale to flame thickness ratio on the bending effect burning velocity variation have been analysed based a three-dimensional Direct Numerical Simulation database statistically planar premixed flames with characteristic Lewis number unity propagating into forced unburned gas turbulence. It has demonstrated that Damköhler's first hypothesis remains valid f...

We determine the Compton effect from the Volkov solution of the Dirac equation for a process in medium with the index of refraction n. Volkov solution involves the mass shift, or, the mass renormalization of an electron. We determine the modified Compton formula for the considered physical situation. The index of refraction causes that the wave lengths of the scattered photons are shorter for s...

Experiments show that the optical reflectance of a random medium can have a nonmonotonic dependence on wavelength even when its absorption spectrum is flat and its scattering coefficient decreases monotonically with wavelength. Measured at a particular radial distance from the illumination point, the reflectance is almost independent of wavelength over a wide band. The peak wavelength of the re...