Seasonal weather variations have a profound effect on the integrity of cohesionless soil slopes in Canadian Prairies owing to prevalent semi-arid continental climate. The primary contribution this research is development transient and two-dimensional stability model that fully coupled with hydraulic thermal flows. was used predict factor safety (FS) for two slope geometries (18 m height 26 heig...

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We consider the acceleration of charged particles near ultra-relativistic shocks, with Lorentz factor Γs 1. We present simulations of the acceleration process and compare these with results from semi-analytical calculations. We show that the spectrum that results from acceleration near ultra-relativistic shocks is a power law, N(E) ∝ E−s, with a nearly universal value s ≈ 2.2 − 2.3 for the slop...

Bedrock river-gorge incision represents a fundamental landscape-shaping process, but dearth of observational data at >10 yr timescales impedes understanding gorge formation. I quantify 102 rates and processes using historical records, field observations, topographic image analysis human-caused bedrock meander cutoff along the North Fork Fortymile River in Alaska (USA). Miners cut off 190...

Organizations operating in the oil and gas sector face enormous challenges, including the pressing need to find and exploit new energy supplies, greater regulatory pressures, new workflow requirements, and the demands of a a changing professional labor force. At the same time, upstream companies face a serious and growing risk from cyber-attacks, malicious software, and other threats against th...

The construction of a cut-off wall is common reinforcement method for earth rock dams. At present, compared with the in-depth study on homogeneous dams, more and attention being paid to stability deformation dams strengthened by concrete wall. In this study, aiming at Wujing project dam wall, influence water level rise fall slope, body, crack width crest were analyzed numerical calculation in s...

Organizations operating in the oil and gas sector face enormous challenges, including the pressing need to find and exploit new energy supplies, greater regulatory pressures, new workflow requirements, and the demands of a a changing professional labor force. At the same time, upstream companies face a serious and growing risk from cyber-attacks, malicious software, and other threats against th...