## Search

Now showing items 21-30 of 191

#### Radio Imaging of the Very-High-Energy Gamma-Ray Emission Region in the Central Engine of a Radio Galaxy

(2009)

The accretion of matter onto a massive black hole is believed to feed the relativistic plasma jets found in many active galactic nuclei (AGN). Although some AGN accelerate particles to energies exceeding 10^12 electron ...

#### Small amplitude waves and stability for a pre-stressed viscoelastic solid

(Springer, 2009)

We study the propagation of small amplitude waves superimposed on a large static deformation in a nonlinear viscoelastic material of differential type. We use bulk waves and surface waves to address the questions of ...

#### Bimodular rubber buckles early in bending

(Elsevier, 2009-12-03)

A block of rubber eventually buckles under severe flexure, and several axial wrinkles appear on the inner curved face of the bent block. Experimental measurements reveal that the buckling occurs earlier - at lower compressive ...

#### Surface waves and surface stability for pre-stretched, unconstrained, non-linearly elastic half-space

(Elsevier, 2009-06)

An unconstrained, non-linearly elastic, semi-infinite solid is maintained in a state of large static plane strain. A power¿law relation between the pre-stretches is assumed and it is shown that this assumption is well ...

#### Compact travelling waves in viscoelastic solids

(IOP Science, 2009-09-02)

We introduce a model for nonlinear viscoelastic solids, for which travelling shear waves with compact support are possible. Using analytical and numerical methods, we investigate the general case of this model, and an ...

#### On the Abaqus FEA model of finite viscoelasticity

(American Chemical Society, 2009-05)

Predictions of the QLV (Quasi-Linear Viscoelastic) constitutive law are compared with those of the ABAQUS viscoelastic model for two simple motions in order to highlight, in particular, their very different dissipation ...

#### Very High Energy Observations of Gamma-Ray Burst Locations with the Whipple Telescope

(2007)

Gamma-ray burst (GRB) observations at very high energies (VHE, E > 100 GeV) can impose tight constraints on some GRB emission models. Many GRB afterglow models predict a VHE component similar to that seen in blazars and ...

#### Modelling exposure to pharmaceutical agents

(Institute of Physics, 2009)

Aerosol exposure to the active ingredients of pharmaceuticals arises in research, development and manufacturing. In most instances it is only possible to make small numbers of measurements of exposure and given the inter- ...

#### On the application of robust numerical methods to a complete flow wave-current model. Boundary and Interior Layers ONERA

(2004)

We aim to show how parameter-robust numerical method may be employed to solve equations arising in the modelling of wave-current interactions.We present two such models: a complete flow model for wave-current interaction ...

#### Piezoacoustic wave spectra using improved surface impedance matrix: Application to high impedance-contrast layered plates

(2008)

Starting from the general modal solutions for a homogeneous layer of arbitrary material and crystalline symmetry, a matrix formalism is developed to establish the semianalytical expressions of the surface impedance matrices ...