SEFA Hub and Spoke Evaluation - year two progress report and interim findings 2014-15

This report details findings from the second year of a four-year evaluation of the ‘Hub and Spoke’ initiative, being undertaken by the University of Bedfordshire. Funded by the Child Sexual Exploitation Funders’ Alliance (CSEFA), this initiative aims to improve services in relation to child sexual exploitation (CSE). It utilises the expertise, resources and infrastructure of an established voluntary sector CSE service (the ‘Hub’) by locating experienced CSE workers (known as ‘Spoke workers’) into new service delivery areas. The evaluation assesses the extent to which the Hub and Spoke model triggers cultural and systemic change in the way that services engaging with young people respond to CSE.

An accelerator mode based technique for studying quantum chaos

We experimentally demonstrate a method for selecting small regions of phase space for kicked rotor quantum chaos experiments with cold atoms. Our technique uses quantum accelerator modes to selectively accelerate atomic wavepackets with localized spatial and momentum distributions. The potential used to create the accelerator mode and subsequently realize the kicked rotor system is formed by a set of off-resonant standing wave light pulses. We also propose a method for testing whether a selected region of phase space exhibits chaotic or regular behavior using a Ramsey type separated field experiment.Comment: 5 pages, 3 figures, some modest revisions to previous version (esp. to the figures) to aid clarity; accepted for publication in Physical Review A (due out on January 1st 2003

Raman Spectroscopy of Liquid-Based Cervical Smear Samples as a Triage to Stratify Women Who Are HPV-Positive on Screening

Persistent high-risk human papillomavirus (HPV) infection can lead to cervical precancer and cancer. Recently, HPV testing has been introduced for primary cervical screening, but the HPV DNA test cannot distinguish between transient and persistent HPV infection. Thus, there is an unmet clinical need to develop a new test to identify women with a high-risk persistent HPV infection. Raman spectra were recorded from cervical smear samples (n = 60) and, on the basis of HPV DNA and HPV mRNA test results, a classifier was developed to identify persistent HPV infection. A further blinded independent test set (n = 14) was used to validate the model, and sensitivity of 90% and specificity of 100% were achieved. Improved triage would allow women with a high-risk persistent HPV infection to be referred for immediate treatment, while women with a low-risk transient infection could avoid overtreatment

Theoretical analysis of quantum dynamics in 1D lattices: Wannier-Stark description

This papers presents a formalism describing the dynamics of a quantum particle in a one-dimensional tilted time-dependent lattice. The description uses the Wannier-Stark states, which are localized in each site of the lattice and provides a simple framework leading to fully-analytical developments. Particular attention is devoted to the case of a time-dependent potential, which results in a rich variety of quantum coherent dynamics is found.Comment: 8 pages, 6 figures, submitted to PR

Coherent Manipulation of Quantum Delta-kicked Dynamics: Faster-than-classical Anomalous Diffusion

Large transporting regular islands are found in the classical phase space of a modified kicked rotor system in which the kicking potential is reversed after every two kicks. The corresponding quantum system, for a variety of system parameters and over long time scales, is shown to display energy absorption that is significantly faster than that associated with the underlying classical anomalous diffusion. The results are of interest to both areas of quantum chaos and quantum control.Comment: 6 pages, 4 figures, to appear in Physical Review

Comorbidity and repeat admission to hospital for adverse drug reactions in older adults: retrospective cohort study

Objectives To identify factors that predict repeat admission to hospital for adverse drug reactions (ADRs) in older adults

The online world of the future: Safe, productive, and creative

A safer online world is required to attain higher levels of productivity and creativity. We offer a view of a future state of the online world that places safety, productivity, and creativity above all else. The online world envisaged for 2030 is safe (i.e., users communicate with accuracy and enduring confidence), productive (i.e., users make timely decisions that have an ongoing global effect), and creative (i.e., users can connect seemingly unrelated information online). The proposed view differs from other views of the future online world that are anchored around technology solutions, confrontation, deception, and personal or commercial gain. The following seven conditions characterize the proposed view of the online world: i) global-scale autonomous learning systems; ii) humans co-working with machines; iii) human factors that are authentic and transferrable; iv) global scale whole-brain communities; v) foundational knowledge that is authentic and transferrable; vi) timely productive communication; and vii) continuous technological adaptation. These conditions are expected to enable new social-behavioural, socio-technical, and organizational interaction models

Control of Dynamical Localization

Control over the quantum dynamics of chaotic kicked rotor systems is demonstrated. Specifically, control over a number of quantum coherent phenomena is achieved by a simple modification of the kicking field. These include the enhancement of the dynamical localization length, the introduction of classical anomalous diffusion assisted control for systems far from the semiclassical regime, and the observation of a variety of strongly nonexponential lineshapes for dynamical localization. The results provide excellent examples of controlled quantum dynamics in a system that is classically chaotic and offer new opportunities to explore quantum fluctuations and correlations in quantum chaos.Comment: 9 pages, 7 figures, to appear in Physical Review

Modulation of renal oxygenation and perfusion in rat kidney monitored by quantitative diffusion and blood oxygen level dependent magnetic resonance imaging on a clinical 1.5T platform

ARRIVE Checklist. (DOCX 42 kb