BMJ

Simulations of recently observed shear shock wave physics amplify local brain accelerations by a factor of 40 in head drop experiments – future implications for concussion

1 Mathew Gfeller Sport-Related Traumatic Brain Injury Research Centre, Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, USA 2 Human Movement Science ...
Nature

Superluminal X-waves in a polariton quantum fluid

In this work, we experimentally demonstrate for the first time the spontaneous generation of two-dimensional exciton-polariton X-waves. X-waves belong to the family of localized packets that can ...
AZOM

Acoustic Testing - Nonlinear Acoustic Testing Techniques, A Form of Nondestructive Testing

Strike a bell, and the bell rings at its resonance modes. Strike it harder and the bell rings at the same tone, only louder. Now imagine a small crack in the bell, perhaps invisible to the eye. We ...