Results 41 to 50 of about 347,947 (351)
Photogrammetric Prediction of Rock Fracture Properties and Validation with Metric Shear Tests
Geosciences, 2021 An accurate understanding of jointed rock mass behavior is important in many applications ranging from deep geological disposal of nuclear waste, to deep mining, and to urban geoengineering projects.
Lauri Uotinen +4 more
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Applied SciencesSlope stability is a major safety concern of rockfill embankments. Since rockfills are incohesive materials, only friction angle is considered as a shear strength parameter in the slope stability analysis of rockfill embankments.
Congyong Ran +5 more
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CivilEng, 2022 Conducting laboratory direct shear tests on granular materials is a common practice in geotechnical engineering. This is usually done by following the ASTM D3080/D3080M-11 (hereafter named ASTM), which stipulates a minimum required value of 10 for ...
Akram Deiminiat, Li Li, Feitao Zeng
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Energy Dissipation and Trapping of Particles Moving on a Rough Surface
, 1997 We report an experimental, numerical and theoretical study of the motion of a ball on a rough inclined surface. The control parameters are $D$, the diameter of the ball, $\theta$, the inclination angle of the rough surface and $E_{ki}$, the initial ...
A. Aguirre +22 more
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Multifluid Eulerian modeling of dense gas–solids fluidized bed hydrodynamics: Influence of the dissipation parameters [PDF]
, 2008 Computational fluid dynamic (CFD) models must be thoroughly validated before they can be used with confidence for designing fluidized bed reactors.
Cadoret, Loic +5 more
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Friction Angle Prediction of Carbonate Rocks: A Case Study, Rumaila Oil Field
Iraqi Geological JournalFriction angle (𝜑) and Cohesion (𝑐) are the most important factors to depict rock's shear strength. The friction angle (φ) expresses a unit of rock's capacity to endure shear stress. For the optimization of drilling operations, monitoring of the
Doaa Mahdi, Ayad Alrazzaq
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Relativistic Dynamical Friction in the Weak Scattering Limit
, 1994 A test mass, $M$, moving through an ambient medium of light particles with lower average kinetic energy than itself suffers a deceleration caused by its scattering of the light particles. The phenomenon is usually referred to as dynamical friction.
Syer, D.
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In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS
FEBS Letters, EarlyView.We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka +11 more
wiley +1 more source
Cross-sectional river shapes: A variational discharge-resistance formulation [PDF]
, 1999 Cross-sectional river shapes were obtained from a variational principle: minimizing the bed friction for a given discharge and a given maximum lateral bed slope (angle of repose).
Beckum, F.P.H. van +2 more
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Force indeterminacy in the jammed state of hard disks
, 2005 Granular packings of hard discs are investigated by means of contact dynamics which is an appropriate technique to explore the allowed force-realizations in the space of contact forces.
Dietrich E. Wolf +7 more
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