proton-deuteron elastic scattering above the deuteron breakup

The complex Kohn variational principle and the (correlated) hyperspherical harmonics method are applied to study the proton-deuteron elastic scattering at energies above the deuteron breakup threshold. Results for the elastic cross section and various elastic polarization observables have been obtained by fully taking into account the long-range effect of the Coulomb interaction and using a realistic nucleon-nucleon interaction model. Detailed comparison between the theoretical predictions and the accurate and abundant proton-deuteron experimental data can now be performed.Comment: 6 pages, 2 figure

The illusion of competency versus the desirability of expertise: Seeking a common standard for support professions in sport

In this paper we examine and challenge the competency-based models which currently dominate accreditation and development systems in sport support disciplines, largely the sciences and coaching. Through consideration of exemplar shortcomings, the limitations of competency-based systems are presented as failing to cater for the complexity of decision making and the need for proactive experimentation essential to effective practice. To provide a better fit with the challenges of the various disciplines in their work with performers, an alternative approach is presented which focuses on the promotion, evaluation and elaboration of expertise. Such an approach resonates with important characteristics of professions, whilst also providing for the essential ‘shades of grey’ inherent in work with human participants. Key differences between the approaches are considered through exemplars of evaluation processes. The expertise-focused method, although inherently more complex, is seen as offering a less ambiguous and more positive route, both through more accurate representation of essential professional competence and through facilitation of future growth in proficiency and evolution of expertise in practice. Examples from the literature are also presented, offering further support for the practicalities of this approach

Modelling English spatial preposition detectors

In this paper we present five algorithms for the detection of spatial relationships within an image: above/below, adjacent to, occlusion, between, and close to

The antinomies of political evidence in post-apartheid Durban, South Africa

Post-Apartheid South Africa has witnessed an outpouring of testimony to past and present inequities, using varied means and to varied effect. This paper addresses challenges faced by people engaged in social justice work as they devise evidence specifically for political ends. Political evidence poses several challenges to people consciously engaged in transforming their social conditions. I ask how various forms of political evidence and testimony to post-Apartheid racism are produced in the neighbourhood of Wentworth, Durban – a mixed industrial-residential landscape saturated with petrochemical pollution. People engaged in political work in Wentworth struggle to demonstrate evidence of environmental racism against official dissimulation. Wentworth's residents often face the limits of legal-juridical notions of evidence exemplified in compensatory disputes. I explore how evidence is mobilized in political work through specific tools and authorizing discourses that privilege compensation alongside other forms of activist witnessing of social inequality. Certain kinds of evidence are deemed more legitimate as political evidence, whether or not these kinds can help transform persisting inequalities after Apartheid. While official dissimulation points to the limits of narrowing the focus to compensation, official silencing also highlights emergent forms of witness to legal, racialized social inequality. Wentworth speaks to innovations in political evidence in the wake of a racially fragmented archive, and in relation to new forms of state-sanctioned racism