Geometry of Empty Space is the Key to Near-Arrest Dynamics

We study several examples of kinetically constrained lattice models using dynamically accessible volume as an order parameter. Thereby we identify two distinct regimes exhibiting dynamical slowing, with a sharp threshold between them. These regimes are identified both by a new response function in dynamically available volume, as well as directly in the dynamics. Results for the selfdiffusion constant in terms of the connected hole density are presented, and some evidence is given for scaling in the limit of dynamical arrest.Comment: 11 page

Governing for ecosystem health and human wellbeing

Governance arrangements and processes influence access to and benefits from ecosystem services, and therefore the potential for ecosystem services to alleviate poverty. Governance also then influences the health of ecosystems. This chapter learns from decades of governance-related research to identify how to make ecosystem governance more effectively ‘pro-poor’. It is informed by a systematic mapping of literature related to governance of ecosystem services and renewable natural resources for improved wellbeing and poverty alleviation, expert interviews and a workshop with government and non-government actors across a range of sectors from both North and South. The chapter is organised around the concept of trade-offs, considering first ecosystem-focused approaches, then rights-based approaches and lastly, participatory approaches to governance. The chapter further addresses the relevance of scale and multiple administrative levels (multi-level governance) and the importance of informal, or socially embedded, institutions. The chapter concludes that there is no single governance approach that can definitively deliver on improved ecosystem health and human wellbeing, that trade-offs are inevitable and governance is therefore an inherently political process

Clarification of the Bootstrap Percolation Paradox

We study the onset of the bootstrap percolation transition as a model of generalized dynamical arrest. We develop a new importance-sampling procedure in simulation, based on rare events around "holes", that enables us to access bootstrap lengths beyond those previously studied. By framing a new theory in terms of paths or processes that lead to emptying of the lattice we are able to develop systematic corrections to the existing theory, and compare them to simulations. Thereby, for the first time in the literature, it is possible to obtain credible comparisons between theory and simulation in the accessible density range.Comment: 4 pages with 3 figure

Corticosterone predicts foraging behavior and parental care in Macaroni Penguins

Corticosterone has received considerable attention as the principal hormonal mediator of allostasis or physiological stress in wild animals. More recently, it has also been implicated in the regulation of parental care in breeding birds, particularly with respect to individual variation in foraging behaviour and provisioning effort. There is also evidence that prolactin can work either inversely or additively with corticosterone to achieve this. Here we test the hypothesis that endogenous corticosterone plays a key physiological role in the control of foraging behaviour and parental care using a combination of exogenous corticosterone treatment, time-depth telemetry, and physiological sampling of female macaroni penguins (Eudyptes chrysolophus) during the brood-guard period of chick rearing, while simultaneously monitoring patterns of prolactin secretion. Plasma corticosterone levels were significantly higher in females given exogenous implants relative to those receiving sham implants. Increased corticosterone levels were associated with significantly higher levels of foraging and diving activity, and greater mass gain in implanted females. Elevated plasma corticosterone was also associated with an apparent fitness benefit in the form of increased chick mass. Plasma prolactin levels did not correlate with corticosterone levels at any time, nor was prolactin correlated with any measure of foraging behaviour or parental care. Our results provide support for the corticosterone-adaptation hypothesis, which predicts that higher corticosterone levels support increased foraging activity and parental effort

Local carrier recombination and associated dynamics in m-plane InGaN/GaN quantum wells probed by picosecond cathodoluminescence

Research data in support of the publication "Local carrier recombination and associated dynamics in m-plane InGaN/GaN quantum wells probed by picosecond cathodoluminescence". We have included the original data (tab-separated text files) as plotted for the quantum wells, measured by spatially- and time-resolved cathodoluminescence

Demographics of dogs, cats, and rabbits attending veterinary practices in Great Britain as recorded in their electronic health records

Abstract Background Understanding the distribution and determinants of disease in animal populations must be underpinned by knowledge of animal demographics. For companion animals, these data have been difficult to collect because of the distributed nature of the companion animal veterinary industry. Here we describe key demographic features of a large veterinary-visiting pet population in Great Britain as recorded in electronic health records, and explore the association between a range of animal’s characteristics and socioeconomic factors. Results Electronic health records were captured by the Small Animal Veterinary Surveillance Network (SAVSNET), from 143 practices (329 sites) in Great Britain. Mixed logistic regression models were used to assess the association between socioeconomic factors and species and breed ownership, and preventative health care interventions. Dogs made up 64.8% of the veterinary-visiting population, with cats, rabbits and other species making up 30.3, 2.0 and 1.6% respectively. Compared to cats, dogs and rabbits were more likely to be purebred and younger. Neutering was more common in cats (77.0%) compared to dogs (57.1%) and rabbits (45.8%). The insurance and microchipping relative frequency was highest in dogs (27.9 and 53.1%, respectively). Dogs in the veterinary-visiting population belonging to owners living in least-deprived areas of Great Britain were more likely to be purebred, neutered, insured and microchipped. The same association was found for cats in England and for certain parameters in Wales and Scotland. Conclusions The differences we observed within these populations are likely to impact on the clinical diseases observed within individual veterinary practices that care for them. Based on this descriptive study, there is an indication that the population structures of companion animals co-vary with human and environmental factors such as the predicted socioeconomic level linked to the owner’s address. This ‘co-demographic’ information suggests that further studies of the relationship between human demographics and pet ownership are warranted

Guidelines for the Treatment of PTSD Using Clinical EFT (Emotional Freedom Techniques)

Clinical EFT (Emotional Freedom Techniques) is an evidence-based method that combines acupressure with elements drawn from cognitive and exposure therapies. The approach has been validated in more than 100 clinical trials. Its efficacy for post-traumatic stress disorder (PTSD) has been investigated in a variety of demographic groups including war veterans, victims of sexual violence, the spouses of PTSD sufferers, motor accident survivors, prisoners, hospital patients, adolescents, and survivors of natural and human-caused disasters. Meta-analyses of EFT for anxiety, depression, and PTSD indicate treatment effects that exceed those of both psychopharmacology and conventional psychotherapy. Studies of EFT in the treatment of PTSD show that (a) time frames for successful treatment generally range from four to 10 sessions; (b) group therapy sessions are effective; (c) comorbid conditions such as anxiety and depression improve simultaneously; (d) the risk of adverse events is low; (e) treatment produces physiological as well as psychological improvements; (f) patient gains persist over time; (g) the approach is cost-effective; (h) biomarkers such as stress hormones and genes are regulated; and (i) the method can be adapted to online and telemedicine applications. This paper recommends guidelines for the use of EFT in treating PTSD derived from the literature and a detailed practitioner survey. It has been reviewed by the major institutions providing training or supporting research in the method. The guidelines recommend a stepped-care model, with five treatment sessions for subclinical PTSD, 10 sessions for PTSD, and escalation to intensive psychotherapy or psychopharmacology or both for nonresponsive patients and those with developmental trauma. Group therapy, social support, apps, and online and telemedicine methods also contribute to a successful treatment pla

Effect of QW growth temperature on the optical properties of blue and green InGaN/GaN QW structures

In this paper we report on the impact that the quantum well growth temperature has on the internal quantum efficiency and carrier recombination dynamics of two sets of InGaN/GaN multiple quantum well samples, designed to emit at 460 and 530 nm, in which the indium content of the quantum wells within each sample set was maintained. Measurements of the internal quantum efficiency of each sample set showed a systematic variation, with quantum wells grown at a higher temperature exhibiting higher internal quantum efficiency and this variation was preserved at all excitation power densities. By investigating the carrier dynamics at both 10 K and 300 K we were able to attribute this change in internal quantum efficiency to a decrease in the non-radiative recombination rate as the QW growth temperature was increased which we attribute to a decrease in incorporation of the point defects