We have conducted both experiments and numerical simulations to investigate supersonic cracks. The experiments are performed at 85 oC in order to remove strain-induced crystallites that complicate experiments at lower temperature. Shear and longitudinal sound speeds are measured to find the...

Light-scattering measurements of the time-dependent local radial velocity in a rotating fluid reveal three distinct transitions as the Reynolds number is increased, each of which adds a new frequency to the velocity spectrum.  At a higher, sharply defined Reynolds number all discrete spectral peaks...

In shallow temperature gradients, changes in temperature that bacteria experience occur over long time-scales. Therefore slow processes, such as adaptation, metabolism, chemicals secretion, and even gene expression become important. Since all these changes are related to cellular activity, the cell density...