A review of restorative justice responses to offending

Restorative justice has been enthusiastically embraced in many justice systems as an alternative to incarceration for young adult and Indigenous offenders. But how well does it work? Abstract The present review sought to determine on the available evidence (a) whether restorative justice (RJ) is an effective means of reducing re-offending, (b) what benefits victims of crime obtain from participation in the RJ process, (c) whether the public supports the principles of RJ, and (d) how the cost and efficiency of RJ proceedings compare with conventional courts in cost and efficiency (i.e. time taken to finalize cases). The review finds little reliable evidence that RJ reduces re-offending. Victims who participate in RJ are generally satisfied with the experience but it is unclear whether they are more satisfied than victims in similar cases that are dealt with in court. The limited evidence available suggests that the public supports the principles of RJ. It appears to be a less expensive and more efficient way of finalizing criminal cases involving young people but, once again, the evidence on this issue at this stage is rather limited. Evidence Base, issue 1, 201

A new species of Mayfly, Maccaffertium annae sp. n. (Ephemeroptera: Heptageniidae) from Mexican Amber (Miocene)

Maccaffertium annae sp. n. is described in the Mexican amber of early Miocene age. It constitutes the first species of mayfly (Ephemeroptera), the first record of the family Heptageniidae to be described from this amber, and also the first fossil record of the genus Maccaffertium. The species is represented by male and female imagos in one piece of amber

Reverse Derivative Categories

The reverse derivative is a fundamental operation in machine learning and automatic differentiation. This paper gives a direct axiomatization of a category with a reverse derivative operation, in a similar style to that given by Cartesian differential categories for a forward derivative. Intriguingly, a category with a reverse derivative also has a forward derivative, but the converse is not true. In fact, we show explicitly what a forward derivative is missing: a reverse derivative is equivalent to a forward derivative with a dagger structure on its subcategory of linear maps. Furthermore, we show that these linear maps form an additively enriched category with dagger biproducts.Comment: Extended version of paper to appear at CSL 202

Shape-preserving diffusion of a high-order mode

The close relation between the processes of paraxial diffraction and coherent diffusion is reflected in the similarity between their shape-preserving solutions, notably the Gaussian modes. Differences between these solutions enter only for high-order modes. Here we experimentally study the behavior of shape-preserving high-order modes of coherent diffusion, known as 'elegant' modes, and contrast them with the non-shape-preserving evolution of the corresponding 'standard' modes of optical diffraction. Diffusion of the light field is obtained by mapping it onto the atomic coherence field of a diffusing vapor in a storage-of-light setup. The growth of the elegant mode fits well the theoretical expectations

CTMC calculations of electron capture and ionization in collisions of multiply charged ions with elliptical Rydberg atoms

We have performed classical trajectory Monte Carlo (CTMC) studies of electron capture and ionization in multiply charged (Q=8) ion-Rydberg atom collisions at intermediate impact velocities. Impact parallel to the minor and to the major axis, respectively, of the initial Kepler electron ellipse has been investigated. The important role of the initial electron momentum distribution found for singly charged ion impact is strongly disminished for higher projectile charge, while the initial spatial distribution remains important for all values of Q studied.Comment: 3 pages, 5 figure

Theoretical He I Emissivities in the Case B Approximation

We calculate the He I case B recombination cascade spectrum using improved radiative and collisional data. We present new emissivities over a range of electron temperatures and densities. The differences between our results and the current standard are large enough to have a significant effect not only on the interpretation of observed spectra of a wide variety of objects but also on determinations of the primordial helium abundance.Comment: Accepted to ApJ