Nuclear giant quadrupole resonances in spherical even-even nuclei

The dynamic collective model has been extended to quadrupole giant resonances in spherical nuclei. The splitting of giant dipole and giant quadrupole resonances due to their coupling to surface vibrations has been calculated for Sn isotopes. Agreement with recent γ-absorption measurements of the Livermore group has been found

Le rôle des animateurs dans l’exposition de sciences et techniques: entre dispositifs et visiteurs

International audienceÀ partir d’une étude de terrain réalisée au Pavillon des sciences, CCSTI de Franche-Comté, l’auteur analyse les pratiques et les techniques des animateurs en montrant comment celles-ci permettent au public de s’approprier les outils interactifs et plus largement questionnent sur la place respective des manipulations et des dispositifs numériques dans la médiation muséale présentielle en matière de diffusion de la culture scientifique et technique

Patterns of sexual behaviour: the law of evidence: back to the future in Australia and England

A recent Victorian Court of Appeal ruling [in Australia] has sparked concerns that a clamp down on the way child abuse cases are handled could thwart convictions. The Court of Appeal justices ruled only cases that are "remarkably" similar would go before the same jury, making it harder for allegations from multiple complainants to be heard together. There are concerns that this will reduce the number of convictions for sexual offences, especially for those against children. This article explores the approach in England and Wales, and Australia to evidence of a pattern of behaviour, focussing on when it is adduced in cases involving sexual abuse. We first consider the shared common law history of the two jurisdictions before exploring how common law and legislative changes have led to surprisingly different positions in the two countries. We conclude by suggesting a simpler and more rational approach which has started to emerge and could be adopted in both countries, and indeed should be considered in any jurisdiction

Coulomb and quenching effects in small nanoparticle-based spasers

We study numerically the effect of mode mixing and direct dipole-dipole interactions between gain molecules on spasing in a small composite nanoparticles with a metallic core and a dye-doped dielectric shell. By combining Maxwell-Bloch equations with Green's function formalism, we calculate lasing frequency and threshold population inversion for various gain densities in the shell. We find that gain coupling to nonresonant plasmon modes has a negligible effect on spasing threshold. In contrast, the direct dipole-dipole coupling, by causing random shifts of gain molecules' excitation frequencies, hinders reaching the spasing threshold in small systems. We identify a region of parameter space in which spasing can occur considering these effects.Comment: 7 pages, 6 figure

Copyright, Crime and Computers: New Legislative Frameworks for Intellectual Property Rights Enforcement

This paper considers intellectual property rights (IPR) enforcement from the perspective of criminal law, and in particular, drawing on recent Australian legislative reforms concerning copyright, cybercrime, covert investigations, mutual assistance and extradition, prosecution and sentencing options, as well as proceeds of crime recovery. The complex interaction of these laws suggests that the field of IPR enforcement offers numerous investigative, prosecutorial and judicial options beyond those traditionally associated with copyright infringement. Cases discussed include several prosecutions of file-sharing website operators, and the extradition from Australia of a suspect in an International online piracy group prosecution led by the United States Department of Justice

Non-scale-invariant inverse curvature flows in Euclidean space

We consider the inverse curvature flows $\dot x=F^{-p}\nu$ of closed star-shaped hypersurfaces in Euclidean space in case $0<p\not=1$ and prove that the flow exists for all time and converges to infinity, if $0<p<1$, while in case $p>1$, the flow blows up in finite time, and where we assume the initial hypersurface to be strictly convex. In both cases the properly rescaled flows converge to the unit sphere.Comment: 21 pages, this is the published versio