The Momentum Distribution of Liquid 3^3He

We present high-resolution neutron Compton scattering measurements of liquid $^3$He below its renormalized Fermi temperature. Theoretical predictions are in excellent agreement with the experimental data when instrumental resolution and final state effects are accounted for. Our results resolve the long-standing inconsistency between theoretical and experimental estimates of the average atomic kinetic energy.Comment: 5 pages, 4 figure

A Triptych Inquiry: Rethinking Sustainability, Innovation, and Financial Performance

Management scholars have sought to answer the question: is there a financial payoff for ad-dressing ecological and social issues? We move beyond this question and include a time com-ponent for corporate financial performance (CFP) and a firm’s innovativeness in order to ask: when does it pay? Combining a contingency perspective with the resource-based view of the firm clarifies the positive relationship between corporate environmental and social perform-ance (ESP) and CFP, which only holds in the long-term but not in the short-term. Further, we find support for a moderating effect of innovation on the relationship between the ESP and short-term CFP as suggested by the literature. However, we empirically show that in the long-term, innovation mediates the ESP-CFP relationship suggesting that innovation should be considered as a long-term investment required to unlock the full potential of ESP initiatives

Social Networks In The Classroom: Personality Factors As Antecedents Of Student Social Capital

This study examines personality factors as antecedents of student social capital. We hypothesize relationships between two constructs taken from the five-factor model of personality (agreeableness and extraversion) and two variables that reflect a student’s social capital (quantity of ties and strength of ties) in an academic setting. Analysis of roster-based, sociometric data suggests that agreeableness is associated with higher quantity of ties, but not higher tie strength. In contrast, extraversion is linked to higher tie strength, but not higher overall network size. The paper concludes with a discussion of the implications of student social capital for educational research and practice

Superconducting proximity effects in metals with a repulsive pairing interaction

Studies of the superconducting proximity effect in normal conductor/superconductor $(N/S)$ junctions almost universally assume no effective electron-electron coupling in the $N$ region. While such an approximation leads to a simple description of the proximity effect, it is unclear how it could be rigorously justified. We reveal a much more complex picture of the proximity effect in $N/S$ bilayers, where $S$ is a clean s-wave BCS superconductor and $N$ is a simple metal with a repulsive effective electron coupling. We elucidate the proximity effect behavior using a highly accurate method to self-consistently solve the Bogoliubov-deGennes equations. We present our results for a wide range of values of the interface scattering, the Fermi wave vector mismatch, the temperature, and the ratio $g$ of the effective interaction strengths in the $N$ and $S$ region. We find that the repulsive interaction, represented by a negative $g$, strongly alters the signatures of the proximity effect as can be seen in the spatial dependence of the Cooper pair amplitude and the pair potential, as well as in the local density of states near the interface.Comment: 12 pages, including 10 figures. To appear in Phys. Rev.

Advanced Processing of Micropatterned Elasto-Magnetic Membranes

This is the author accepted manuscript. The final version is available from IEEE via the DOI in this record The dataset associated with this article is located in ORE at: https://doi.org/10.24378/exe.1263We report on a fabrication of a highly structured elasto-magnetic membrane with microscopic unit cells using lithographic techniques and electrodeposition. The membrane comprises micromagnets of CoNiP and Co connected via an elastic PDMS network with an area spanning 12 mm². Ellipsoidal CoNiP and circular Co particles were produced by electrodeposition to achieve diameters of 30 (major) and 10 μ m (minor) and 10 μm, respectively, with a thickness in the range of 6-10 μm. The electrodeposition parameters have been optimized on deposition of CoNiP films to produce an in-plane coercivity for CoNiP elements of 435 Oe. The mechanical properties of the elasto-magnetic membrane were confirmed on application of an alternating magnetic field. The proposed methodology offers a new way for fabrication of novel microfluidic and microelectro-mechanical-systems devices.Engineering and Physical Sciences Research Council (EPSRC)European Union Horizon 202

Topographic determinants of foot and mouth disease transmission in the UK 2001 epidemic

Background A key challenge for modelling infectious disease dynamics is to understand the spatial spread of infection in real landscapes. This ideally requires a parallel record of spatial epidemic spread and a detailed map of susceptible host density along with relevant transport links and geographical features. Results Here we analyse the most detailed such data to date arising from the UK 2001 foot and mouth epidemic. We show that Euclidean distance between infectious and susceptible premises is a better predictor of transmission risk than shortest and quickest routes via road, except where major geographical features intervene. Conclusion Thus, a simple spatial transmission kernel based on Euclidean distance suffices in most regions, probably reflecting the multiplicity of transmission routes during the epidemic

Measuring populations to improve vaccination coverage

In low-income settings, vaccination campaigns supplement routine immunization but often fail to achieve coverage goals due to uncertainty about target population size and distribution. Accurate, updated estimates of target populations are rare but critical; short-term fluctuations can greatly impact population size and susceptibility. We use satellite imagery to quantify population fluctuations and the coverage achieved by a measles outbreak response vaccination campaign in urban Niger and compare campaign estimates to measurements from a post-campaign survey. Vaccine coverage was overestimated because the campaign underestimated resident numbers and seasonal migration further increased the target population. We combine satellite-derived measurements of fluctuations in population distribution with high-resolution measles case reports to develop a dynamic model that illustrates the potential improvement in vaccination campaign coverage if planners account for predictable population fluctuations. Satellite imagery can improve retrospective estimates of vaccination campaign impact and future campaign planning by synchronizing interventions with predictable population fluxes