– Granular materials are known to separate by size under a variety of circumstances. Experiments presented here and elucidated by modeling and MD simulation document a new segregation mechanism, namely segregation by friction. The experiments are carried out by placing steel spheres on a horizontal plane enclosed by rectangular sidewalls, and subjecting them to horizontal shaking. Half the sphe...

Background: The rescue operation is dangerous during floods when the street surface is wet and the rescue vehicles moving fast. Rural roads are known with a high percentage of run-off-the-road crashes and accidents, mostly affected by the unsuitable and inappropriate speed of the car and failure to keep a safe side distance from the highway alignment. Determining the length of the vertical curv...

We have measured the surface topography and calculated the surface roughness power spectrum for an asphalt road surface. For the same surface we have measured the friction for a tire tread compound for velocities 10(-6) m s(-1) < v < 10(-3) m s(-1) at three different temperatures (at -8 °C, 20 °C and 48 °C). The friction data was shifted using the bulk viscoelasticity shift factor a(T) to form ...

Nanpu fault 2 has an important control action of buried hill, in order to study the growth connection process and no. function hill through application slip - distance curve back stripping method process, use equilibrium profile analyze its effect on tectonic evolution hill. The results show that No. is characterized by segmentalized growth, caledonian quiet structure, widely distributed carbon...

It is probably unprecedented that an afterdinner speech for the general public is converted into a review article that, 65 years later, is still on an exponential growth curve of citations in the primary scientific literature. But then again, Archibald Vivian Hill was not your average after-dinner speaker. Hill shared a Nobel Prize in 1922 for his discoveries related to muscle heat production a...

With the discovery of Kuiper Belt binaries that have wide separations and roughly equal masses new theories were proposed to explain their formation. Two formation scenarios were suggested by Goldreich and collaborators: In the first, dynamical friction that is generated by a sea of small bodies enables a transient binary to become bound (Ls mechanism); in the second, a transient binary gets bo...

Curve squeal in railway vehicles is an instability mechanism that arises in tight curves under certain running and environmental conditions. In developing a model the most important elements are the characterisation of friction coupled with an accurate representation of the structural dynamics of the wheel. However, the role played by the dynamics of the rail is not fully understood and it is u...