Despite its fundamental role in the dynamics of compressible fluids, bulk viscosity has received little experimental attention and there remains a paucity of measured data. Acoustic spectroscopy provides a robust and accurate approach to measuring this parameter. Working from the Navier-Stokes model of a compressible fluid one can show that the bulk viscosity makes a significant and measurable ...

BACKGROUND Restoration techniques affect shrinkage stress and depth of cure. The authors tested cuspal deflection and depth of cure resulting from the use of different techniques (bulk, incremental, bulk/transtooth illumination) and two resin-based composites (deep curing and conventional). METHODS The authors restored extracted teeth with deep-curing X-tra fil (VOCO, Cuxhaven, Germany) (by u...

We utilized monochromatic high energy synchrotron x-rays (100 keV) to perform transmission diffraction measurements on bulk cadmium zinc telluride (Cd1-xZnxTe, x ~ 0.1) crystals used for room temperature radiation detectors. The highenergy measurements assess the crystalline properties throughout the thickness (2-3 mm) of the structures and we determined in combination with standard high-resolu...