Non-locality and Medium Effects in the Exclusive Photoproduction of Eta Mesons on Nuclei

A relativistic model for the quasifree exclusive photoproduction of $\eta$ mesons on nuclei is extended to include both non-local and medium effects. The reaction is assumed to proceed via the dominant contribution of the S$_{11}$(1535) resonance. The complicated integrals resulting from the non-locality are simplified using a modified version of a method given by Cooper and Maxwell. The non-locality effects are found to affect the magnitude of the cross section. Some possibilities reflecting the effects of the medium on the propagation and properties of the intermediate S$_{11}$ resonance are studied. The effects of allowing the S$_{11}$ to interact with the medium via mean field scalar and vector potentials are considered. Both broadening of width and reduction in mass of the resonance lead to a suppression of the calculated cross sections.Comment: 19 pages, 7 figure

Educating future doctors for uncertainty and complexity.

In 2018 the UK's medical regulator, the General Medical Council, produced a blueprint for undergraduate medical education, Outcomes for graduates.1 This guidance highlights the inclusion of teaching on uncertainty and complexity, in order to reflect the fact that the health and care of many patients is nonlinear and unpredictable. This is an aspect that medical students and newly qualified doctors need to be able to recognise. As a group of medical educators from different UK higher education institutions with an interest in medical student well‐being, we focused our third national symposium for medical teachers (September 2019) around educating for uncertainty and complexity. The emphasis of the symposium was on how we as medical educators can adequately prepare future doctors for the demands of contemporary practice, and indeed more widely for modern society. This focus feels particularly relevant as we write this, poised on the edge of the Covid‐19 pandemic

On-the-fly memory compression for multibody algorithms.

Memory and bandwidth demands challenge developers of particle-based codes that have to scale on new architectures, as the growth of concurrency outperforms improvements in memory access facilities, as the memory per core tends to stagnate, and as communication networks cannot increase bandwidth arbitrary. We propose to analyse each particle of such a code to find out whether a hierarchical data representation storing data with reduced precision caps the memory demands without exceeding given error bounds. For admissible candidates, we perform this compression and thus reduce the pressure on the memory subsystem, lower the total memory footprint and reduce the data to be exchanged via MPI. Notably, our analysis and transformation changes the data compression dynamically, i.e. the choice of data format follows the solution characteristics, and it does not require us to alter the core simulation code

Developing resilience: Stories from novice nurse academics

© 2016 . Background: It is acknowledged that novice nurse academics face many challenges on commencement of their new role. Most are recruited from the clinical arena, with little understanding of the academic triumvirate of teaching, research and service. They struggle with role expectation and experience feelings of isolation and anxiety. Aim: The aim of this paper is to report on an exploration of 14 new nurse academics from two major nursing education institutions as they utilised and developed resilience building strategies. Method: The paper is drawn from a qualitative study that sought to see the world through the eyes of the participants through storytelling. Data was collected using semi-structured, conversational style interviews. Interviews were audio recorded and revealed themes that captured resilience strategies. Results: These themes were: Developing supportive collegial relationships; Embracing positivity; and Reflection and transformative growth. The first theme, developing supportive relationships, provides insight into the mentoring process and the relationships developed with peers and colleagues. The second theme, embracing positivity, describes the factors that assisted them to face the adversity and challenges in the new role. The final theme, reflection and transformative growth, demonstrated participants' reflecting on difficult situations and demonstrating the ability to learn from the experiences and move forward. Conclusions: The strategies utilised by the participants in this study were key factors in the development of resilience which assisted in the transition from clinical nurse to academic. These strategies were often tacit and it is imperative that in a time of acute nurse academic shortages where retention is paramount, that employing organisations support employees and contribute to resilience development. Education on resilience building strategies is fundamental for all new academics and is essential in the transition from clinical nurse to academic

Evaluating Title VII Exposure in a Manufacturing Setting: A Case Study for Human Resource Management Students

Since Title VII of the Civil Rights Act of 1964 became an established part of the employment legal framework, human resource management professionals and compliance officers have played a vital role in evaluating their companies’ vulnerability to litigation based on perceived violations of Title VII, the Age Discrimination in Employment Act, the American with Disabilities Act, and other associated equality protection legislation. Factors to be considered include the plaintiff’s burden of proof, legitimate business defenses, and collection and evaluation of reliable data. This case study calls upon human resource management graduate students to evaluate the potential exposure of a defense manufacturer to gender discrimination litigation, and has been presented in an online learning environment

Unconventional carrier-mediated ferromagnetism above room temperature in ion-implanted (Ga, Mn)P:C

Ion implantation of Mn ions into hole-doped GaP has been used to induce ferromagnetic behavior above room temperature for optimized Mn concentrations near 3 at.%. The magnetism is suppressed when the Mn dose is increased or decreased away from the 3 at.% value, or when n-type GaP substrates are used. At low temperatures the saturated moment is on the order of one Bohr magneton, and the spin wave stiffness inferred from the Bloch-law T^3/2 dependence of the magnetization provides an estimate Tc = 385K of the Curie temperature that exceeds the experimental value, Tc = 270K. The presence of ferromagnetic clusters and hysteresis to temperatures of at least 330K is attributed to disorder and proximity to a metal-insulating transition.Comment: 4 pages, 4 figures (RevTex4

Nearly horizon skimming orbits of Kerr black holes

An unusual set of orbits about extreme Kerr black holes resides at the Boyer-Lindquist radius $r = M$, the coordinate of the hole's event horizon. These ``horizon skimming'' orbits have the property that their angular momentum $L_z$ {\it increases} with inclination angle, opposite to the familiar behavior one encounters at larger radius. In this paper, I show that this behavior is characteristic of a larger family of orbits, the ``nearly horizon skimming'' (NHS) orbits. NHS orbits exist in the very strong field of any black hole with spin a\agt 0.952412M. Their unusual behavior is due to the locking of particle motion near the event horizon to the hole's spin, and is therefore a signature of the Kerr metric's extreme strong field. An observational hallmark of NHS orbits is that a small body spiraling into a Kerr black hole due to gravitational-wave emission will be driven into orbits of progressively smaller inclination angle, toward the equator. This is in contrast to the ``normal'' behavior. For circular orbits, the change in inclination is very small, and unlikely to be of observational importance. I argue that the change in inclination may be considerably larger when one considers the evolution of inclined eccentric orbits. If this proves correct, then the gravitational waves produced by evolution through the NHS regime may constitute a very interesting and important probe of the strong-field nature of rotating black holes.Comment: 9 pages, 5 figures, accepted for publication in PR