Results 21 to 30 of about 753,829 (150)

Laboratory study on the effects of hydraulic and granulometric parameters on the response of granular soil to internal erosion [PDF]

open access: yes, 2019
Erosion is a major environmental problem to agricultural land as well as to civil engineering infrastructures. Rainwater infiltration into granular soils can lead to the migration of fine particles by suffusion.
BENDANI, Karim   +2 more
core  

From uni- to multi-axial fretting-fatigue crack nucleation: Development of a stress-gradient-dependent critical distance approach [PDF]

open access: yesInternational Journal of Fatigue, 2014
Fretting fatigue is characterized by combined high stress gradients induced by contact loading and more homogeneous stress gradients induced by bulk fatigue stressing. The stress gradients computed at the "hot-spot" located on the surface at the trailing contact border are very high, usually above 10 GPa/mm.
Fouvry, Siegfried   +2 more
openaire   +2 more sources

Optomechanical deformation and strain in elastic dielectrics

open access: yes, 2012
Light forces induced by scattering and absorption in elastic dielectrics lead to local density modulations and deformations. These perturbations in turn modify light propagation in the medium and generate an intricate nonlinear response. We generalise an
Born M   +9 more
core   +1 more source

Contrasting responses to catchment modification among a range of functional and structural indicators of river ecosystem health [PDF]

open access: yes, 2009
1. The value of measuring ecosystem functions in regular monitoring programs is increasingly being recognised as a potent tool for assessing river health.
Barbour   +76 more
core   +2 more sources

A Turbulent Constitutive Law for the Two-Dimensional Inverse Energy Cascade

open access: yes, 2005
We develop a fundamental approach to a turbulent constitutive law for the 2D inverse cascade, based upon a convergent multi-scale gradient (MSG) expansion.
Eyink, Gregory L.
core   +2 more sources

Quantifying a stress gradient: An objective approach to variable selection, standardization and weighting in ecosystem assessment

open access: yesEcological Indicators, 2010
Abstract Quantifying relative habitat quality is an important means of ecosystem assessment, and an essential step in the development and validation of indices of biotic integrity (IBI). Variables included in multi-metric IBIs are selected on the basis of their correlation with a human disturbance gradient, and the IBI is tested by examining ...
Rebecca C. Rooney, Suzanne E. Bayley
openaire   +1 more source

Design of FerroElectric MEMS energy harvesting devices [PDF]

open access: yes, 2016
Waste heat is a widely available but little used source of power. Converting a thermal gradient into electricity is conventionally done using the Seebeck effect, but devices that use this effect are naturally inefficient.
Blach, Noah T.   +2 more
core   +1 more source

Equivalent thermo-mechanical parameters for perfect crystals

open access: yes, 2010
Thermo-elastic behavior of perfect single crystal is considered. The crystal is represented as a set of interacting particles (atoms). The approach for determination of equivalent continuum values for the discrete system is proposed.
A.I. Lurie   +16 more
core   +1 more source

Optical vortex trap for resonant confinement of metal nanoparticles [PDF]

open access: yes, 2008
The confinement and controlled movement of metal nanoparticles and nanorods is an emergent area within optical micromanipulation. In this letter we experimentally realise a novel trapping geometry near the plasmon resonance using an annular light field ...
Adams   +28 more
core   +1 more source

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