Studying the stability of slopes is great interest since it associated to various geotechnical applications, e.g., access embankments and landslide mitigation. This paper describes research conducted determine failure load applied at top excavations in sandy soils during construction deep digs without use retaining systems. An experimental program was performed measure ten laboratory-compacted ...

Leatherback sea turtles (Dermochelys coriacea) nest on dynamic, erosion-prone beaches. Erosive processes and resulting nest loss have long been presumed to be a hindrance to clutch survival. In order to better understand how leatherbacks cope with unstable nesting beaches, I investigated the role of beach erosion in leatherback nest site selection at Playa Gandoca, Costa Rica. I also examined t...

We investigate flow separation in the air flow over transverse sand dunes. CFD simulations of the air flow over differently shaped dunes are performed. The length of the recirculation region after the brink of the dune is found to depend strongly on the shape of the dune. We find that the nondimensionalised separation length depends linearly on the slope of the dune at the brink within a large ...

The effect of thermal annealing on leakage current and dielectric breakdown in self-assembled nanodielectric (SAND)metal-insulator-semiconductor (MIS) devices is investigated. Annealing at temperatures of g300 C for 120 s in a reducing atmosphere significantly reduces the leakage current density at typical operating voltages (Vg=3V)while greatly narrowing the distribution of breakdown voltages....

A hypoplastic constitutive model is implemented in a Smoothed Particle Hydrodynamics (SPH) code for the first time. An improved wall boundary treatment is presented for better performance. The proposed approach is first validated by comparing the numerical results with the analytical solutions for oedometer test. Two more problems involving large deformation, i.e. the collapse of sand between t...

Small-scale slope modelling was performed to evaluate the failure process of a landslide triggered by artificial rainfall. The model platform 2.3 m long, 1.0 wide, and 0.5 deep used build small-scale models with same geometric conditions but different soil types/materials, including sand two sand-kaolin mixtures angle. hydraulic response under simulated rainfall monitored using volumetric water...