Phys. Rev. Focus6, 24 (2000) – Published November 28, 2000
The puzzling properties of toothpaste-like materials make sense, based on new experiments showing that pastes have much in common with glasses–disordered materials that physicists have been studying for many years.
Phys. Rev. Focus6, 16 (2000) – Published October 10, 2000
A set of violently shaken beads exhibits a velocity distribution similar to that of an ideal gas, regardless of the shaking speed, suggesting that a fundamental theory of granular materials may be possible.