W e would like to take this opportunity to respond to Dr. Eric Swanson's 1 article on the role of psy-chometrics in plastic surgery. As a collective, our philosophy is different from what has been described by Dr. Swanson, and we would like to illustrate some fundamental concerns we have with his article. 1. Throughout his article, he continually refers to " rigorous methodology, " often citing...

Plastic zone evolution in Al–2 wt% Si metal films on silicon and sapphire substrates was studied using nanoindentation and atomic force microscopy (AFM). AFM was used to measure the extent of plastic pileup, which is a measure of the plastic zone radius in the film. It was found that the plastic zone size develops in a self-similar fashion with increasing indenter penetration when normalized by...

In this paper, the mechanical behavior of plastic concrete being used in the cut-off walls of earth dams has been studied. To do the task, triaxial compression tests on the specimens in various ages and mix designs under different confining pressures have been done and the stress-strain behavior of such materials and their strength parameter changes has been experimentally investigated. It has ...