Results 211 to 220 of about 28,157 (262)
Helium spin-echo as a surface-sensitive probe of vibrational energy dissipation.
Faraday DiscussTamtögl A +5 more
europepmc +1 more source
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Tunable Wave Dispersion in 3D Woodpile Mechanical Metamaterials
2014 International Symposium on Optomechatronic Technologies, 2014We numerically and experimentally investigate the nonlinear wave dispersion in 3D woodpile periodic structures consisting of slender cylindrical rods. The slender rods have low frequency resonance modes that are coupled with the propagating wave. Depending on the coupling of local modes, the propagating waveform in woodpile can change significantly ...
Eunho Kim, Jinkyu Yang
exaly +2 more sources
Journal of Rheology, 1994
A new rheometrical technique has been developed to determine the mechanical relaxation spectra of viscoelastic materials by measurement of shear wave group and phase velocities in a virtual gap rheometer. The technique’s sensitivity and accuracy in providing relaxation spectra directly from measurements arises from exploitation of marked changes in ...
P R Williams +2 more
exaly +2 more sources
A new rheometrical technique has been developed to determine the mechanical relaxation spectra of viscoelastic materials by measurement of shear wave group and phase velocities in a virtual gap rheometer. The technique’s sensitivity and accuracy in providing relaxation spectra directly from measurements arises from exploitation of marked changes in ...
P R Williams +2 more
exaly +2 more sources
Measurement of tissue mechanical properties with shear wave dispersion ultrasound vibrometry (SDUV)
2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2009Shear wave dispersion vibrometry (SDUV) produces motion in tissue using sequential pulses of ultrasound radiation pressure. The resulting motion of the tissue in the form of propagating shear waves can provide information about the material properties of the tissue given the appropriate equations of motion for the geometry of the tissue.
James F Greenleaf +2 more
exaly +3 more sources
Dispersal Patterns, Dispersal Mechanisms, and Invasion Wave Speeds for Invasive Thistles
The American Naturalist, 2007Understanding and predicting population spread rates is an important problem in basic and applied ecology. In this article, we link estimates of invasion wave speeds to species traits and environmental conditions. We present detailed field studies of wind dispersal and compare nonparametric (i.e., data-based) and mechanistic (fluid dynamics model-based)
Olav, Skarpaas, Katriona, Shea
openaire +3 more sources
A linear focusing mechanism for dispersive and non-dispersive wave problems
Journal of Computational Physics, 2011zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yogesh G. Bhumkar +2 more
openaire +2 more sources
Shear wave dispersion and mechanical relaxation spectra
Journal of Physics D: Applied Physics, 1999It is shown that a mechanical stress relaxation spectrum may be obtained directly from measurements of the dispersion of shear waves in viscoelastic media. The effectiveness of this spectrum, in terms of its sensitivity and accuracy in parametrizing distributions of stress relaxation in the frequency domain, is demonstrated with reference to several ...
P R Williams, S Ravji
openaire +1 more source
Shear wave dispersion in mechanically self-similar gel networks
Journal of Physics D: Applied Physics, 1998A study of viscoelastic shear wave dispersion in a simulated gelation process involving mechanically self-similar nodal networks is reported. The network formed at the gel point (the infinite network cluster, or `critical gel') shares a common structural feature of smaller network clusters and the onset of a recognizably `gel-like' feature is shown to ...
P R Williams, R L Williams
openaire +1 more source
Characterization of Wave Dispersion in Viscoelastic Cellular Assemblies by Doublet Mechanics
Chinese Physics Letters, 2009Using the Voigt model, we analyze wave propagation in viscoelastic granular media with a monatomic lattice, planar simple cubic package and cubical—tetrahedral assembly within the context of doublet mechanics. Microstrains of elongation between the doublet particles are considered in the models.
Jin Yan-Fang +3 more
openaire +1 more source