T h e surface roughness of alluvial fans in Death Valley, California, changes as the fans age. Because radar backscatter is sensitive to surface roughness, it is possible to map relative surface age using Synthetic Aperture Radar (SAR) data. We have examined surface roughness estimates in Death Valley from Shuttle Imaging Radar-C SAR data with the use of a technique that we call foreground~back...

Mass transfer characteristics of scleractinian corals are affected by their skeletal morphology and the concentration gradients that develop as a consequence of the interactions of their morphology and biomass with the overlying seawater. These interactions can have a profound effect on coral metabolism. In this study, boundary layer characteristics were compared between different size colonies...

Dynamics of contact line motion and wettability is essential in many industrial applications such as liquid coating, lubrication, printing, painting, condensation, etc. However, the wettability of surfaces depends not only on liquid-solid chemical properties but also can be strongly affected by surface roughness. As a practical application of controlled wettability, we can mention the self-clea...

Abstract One of the methods of increasing soil resistance against failure is soil reinforcement using geosynthetics. Soil-geosynthetic interactions are of great importance and are affected by friction and adhesion at their interface. Soil gradation, contact surface roughness and geotextile density are among the factors affecting soil-geotextiles interaction this study, to investigate the eff...

This paper reports on a laser speckle technique based on that which was first developed by Russo [1] to measure surface roughness. The technique has been extended to image surface roughness using laser scanning. A one dimensional laser scan is used with the second dimension required for imaging provided by movement of the surface. The technique uses two orthogonally polarised laser beams at a s...

A review is presentedof the mechanics of microscale adhesion in microelectromechanical systems (MEMS). Some governingdimensionlessnumbers such as Tabor number, adhesionparameter and peel number for microscale elastic adhesion contact are discussed in detail. The peel number is modiŽ ed for the elastic contact between a rough surface in contact with a smooth plane. Roughness ratio is introduced ...

Laser Beam Melting is a promising Additive Manufacturing technology for the production of complex metal components. During batch production of multiple identical parts in a single build job, we observed parts with deviating surface roughness in certain areas, which all faced away from the laser. This suggests a dependency of surface roughness on the part position in the build chamber. In this w...

When a finger scans a non-smooth surface, a sensation of roughness is experienced. A similar sensation is felt when a finger is in contact with a mobile surface vibrating in the tangential direction. Since an actual finger-surface interaction results in a varying friction force, how can a measured friction force can be converted into skin relative displacement. With a bidirectional apparatus th...

Two experiments investigated the psychophysical consequences for roughness perception of altering the speed of motion with which real textured surfaces are explored using a rigid probe. Two speed ranges were used: a 10-fold change (Experiment 1) and a 4-fold change (Experiment 2). Relative motion was altered both by moving the probe actively over a stationary surface (active mode) and by moving...