Inelastic Behavior in Repeated Shearing of Bovine White Matter

Shearing behavior of polydisperse media.

We study the shearing of polydisperse and bidisperse media with a size ratio of 10. Simulations are performed with a two-dimensional shear cell using contact dynamics. With a truncated power law for the polydisperse media we find that they show a stronger dilatancy and greater resistance to shearing than bidisperse mixtures. To model additives used to control viscosity we introduce so-called "p...

Correction: Steady shearing flows of deformable, inelastic spheres.

Inelastic Dark Matter ∗

Many observations suggest that much of the matter of the universe is nonbaryonic. Recently, the DAMA NaI dark matter direct detection experiment reported an annual modulation in their event rate consistent with a WIMP relic. However, the Cryogenic Dark Matter Search (CDMS) Ge experiment excludes most of the region preferred by DAMA. We demonstrate that if the dark matter can only scatter by mak...

White light extended source shearing interferometer.

A grating lateral shear interferometer is described that can be used with a white light source. The use of the interferometer with certain types of extended sources is also demonstrated.

Editorial: White blood cells matter in neonatal white-matter injury.

Neonatal brain injury remains a common occurrence in preterm infants, and with the enhanced survival of extremely preterm infants, the rates of neonatal brain injury are likely to increase in the future. The most common neuropathological finding in preterm infants is diffuse injury to the cerebral white matter. The etiology of preterm birth and white-matter injury is often unclear; however, pla...