Introduction Have you ever seen video footage of an avalanche or landslide rolling down a hill? Why is it that at one moment everything seems fine then suddenly the mountain begins to slump? This ...

The downhill movement of soil and loose unconsolidated sediments is due to the force of gravity and is resisted by the force of friction. The forces of gravity and friction are in balance at the angle ...

Fine powders and granular materials are extensively used in industrial applications. To manage and to enhance processing techniques, these materials have to be exactly characterized. The ...

The prediction of the angle of repose for raised mounds of dry cohesive granular material is a long-standing problem in the natural sciences and in industry. Using numerical (particle-based) ...

To measure the coefficient of static friction, change the angle on a ramp until a small wooden box slides downslope. One can change the contact surface to metal, add moisture, and change the weight of ...

So, I just rolled back in the door from a two-week road trip with a half-finished screed on my laptop about underbiking, overbiking, and whether marketing is wagging the dog of mountain biking, or ...