Heterogeneity in practice adoption to reduce water quality impacts from sugarcane production in Queensland

A key strategy in reducing water quality impacts into the Great Barrier Reef is to change farm management practices to limit the creation of pollutants or their transmission off farm. However, designing programs to improve adoption in agriculture of Better Management Practices (BMPs) can be challenging because of heterogeneity among landholders and between farms and farming systems. This is relevant to broader issues in the adoption literature where a focus on identifying factors influencing and heterogeneity in adoption have rarely transferred through to analysis and prediction models suitable for policy purposes. In this case study these issues have been tested with sugarcane farmers in Queensland, where the current policy settings are targeting increases in adoption of better management practices from 34% in 2011 to 90% by 2018. The main goals of the study were to identify how rates of adoption for different practices might be explained by (a) the motivations of farmers (b) potential barriers to adoption (c) farm characteristics and (d) financial drivers. The results confirm that measures to improve BMP adoption are complicated by heterogeneity in adoption drivers between practices and across groups of landholders, creating challenges to find effective strategies to encourage adoption

Effective Teaching and Learning: Using ICT

Mellar, H., Kambouri, M., Logan, K., Betts, S., Nance, B., Moriarty, V. (2007) Effective Teaching and Learning: Using ICT. London: NRDC. Available at: http://www.nrdc.org.uk/uploads/documents/doc_3347.pdfResearch report for NRDCFindings and recommendations on effective teaching practice - with the aim of providing material for improving the quality of teaching and learning and for informing developments in initial teacher education and continuing development. (http://www.nrdc.org.uk/uploads/documents/doc_3347.pdf

Making universal access to water affordable in Zambia and Zimbabwe

As per capita costs of rural water supply escalate, and donor funding cannot keep pace, it will be necessary to look at alternative solutions to achieve universal access in sub-Saharan Africa. Leveraging funds from new sources and minimising costs to government may help to avoid a slow-down in progress to 2030. Results from UNICEF-funded reviews of Accelerated Self-supply in Zambia and Zimbabwe suggest Self-supply is an essential strategy to achieve universal access, especially in remote areas with low population density where many of the remaining unserved reside. Government must adopt complementary or hybrid strategies, incorporating Community Water Supply and Self-supply, if the SDG target of universal and equitable access to safe and affordable drinking water is to be met. Including self-financing in rural water supply strategies will require development of new affordable standards for smaller communities, but could save the two governments almost $400,000,000, cutting the necessary budget by 35-40%

Estimating Counterfactual Risk Under Hypothetical Interventions in the Presence of Competing Events: Crystalline Silica Exposure and Mortality From 2 Causes of Death.

Exposure to silica has been linked to excess risk of lung cancer and nonmalignant respiratory disease mortality. In this study we estimated risk for both these outcomes in relation to occupational silica exposure as well as the reduction in risk that would result from hypothetical interventions on exposure in a cohort of exposed workers. Analyses were carried out using data from an all-male study population consisting of 2,342 California diatomaceous earth workers regularly exposed to crystalline silica and followed between 1942 and 2011. We estimated subdistribution risk for each event under the natural course and interventions of interest using the parametric g-formula to adjust for healthy-worker survivor bias. The risk ratio for lung cancer mortality, comparing an intervention in which a theoretical maximum exposure limit was set at 0.05 mg/m3 (the current US regulatory limit) with the observed exposure concentrations, was 0.86 (95% confidence interval: 0.63, 1.22). The corresponding risk ratio for nonmalignant respiratory disease mortality was 0.69 (95% confidence interval: 0.52, 0.93). Our findings suggest that risks from both outcomes would have been considerably lower if historical silica exposures in this cohort had not exceeded current regulatory limits

Exposure-Lag-Response in Longitudinal Studies: Application of Distributed-Lag Nonlinear Models in an Occupational Cohort.

Prolonged exposures can have complex relationships with health outcomes, as timing, duration, and intensity of exposure are all potentially relevant. Summary measures such as cumulative exposure or average intensity of exposure may not fully capture these relationships. We applied penalized and unpenalized distributed-lag nonlinear models (DLNMs) with flexible exposure-response and lag-response functions in order to examine the association between crystalline silica exposure and mortality from lung cancer and nonmalignant respiratory disease in a cohort study of 2,342 California diatomaceous earth workers followed during 1942-2011. We also assessed associations using simple measures of cumulative exposure assuming linear exposure-response and constant lag-response. Measures of association from DLNMs were generally higher than those from simpler models. Rate ratios from penalized DLNMs corresponding to average daily exposures of 0.4 mg/m3 during lag years 31-50 prior to the age of observed cases were 1.47 (95% confidence interval (CI): 0.92, 2.35) for lung cancer mortality and 1.80 (95% CI: 1.14, 2.85) for nonmalignant respiratory disease mortality. Rate ratios from the simpler models for the same exposure scenario were 1.15 (95% CI: 0.89, 1.48) and 1.23 (95% CI: 1.03, 1.46), respectively. Longitudinal cohort studies of prolonged exposures and chronic health outcomes should explore methods allowing for flexibility and nonlinearities in the exposure-lag-response

Heated aquatic microcosms for climate change experiments

Ponds and shallow lakes are likely to be strongly affected by climate change, and by increase in environmental temperature in particular. Hydrological regimes and nutrient cycling may be altered, plant and animal communities may undergo changes in both composition and dynamics, and long-term and difficult to reverse switches between alternative stable equilibria may occur. A thorough understanding of the potential effects of increased temperature on ponds and shallow lakes is desirable because these ecosystems are of immense importance throughout the world as sources of drinking water, and for their amenity and conservation value. This understanding can only come through experimental studies in which the effects of different temperature regimes are compared. This paper reports design details and operating characteristics of a recently constructed experimental facility consisting of 48 aquatic microcosms which mimic the pond and shallow lake environment. Thirty-two of the microcosms can be heated and regulated to simulate climate change scenarios, including those predicted for the UK. The authors also summarise the current and future experimental uses of the microcosms

A briefing for mental health professionals : why asking about abuse matters to service users (REVA project, briefing 3)

There are high prevalence rates of violent and abusive experience in both the childhoods and adult lives of mental health service users. Histories of childhood sexual and physical abuse amongst women service users are particularly well documented. Although many of the samples in studies are small, figures of over 50% are not unusual (Palmer et al, 1992; Bryer et al, 1987; Walker and James, 1992; Wurr and Partridge, 1996). In secure settings this figure is even higher (Bland et al, 1999). Studies of severe domestic violence among psychiatric in-patients report lifetime prevalence ranging from 30% to 60% (Golding, 1999; Howard et al. 2010). The REVA study, on which this briefing is based, has also found that people who suffer violence and abuse are much more likely to have a mental disorder, self-harm or attempt suicide than those with little or no experience of this kind (Scott et al, 2013). Given the prevalence of experiences of abuse among users of adult mental health services it is vitally important that these experiences are identified to ensure appropriate diagnosis, support and referral. Since 2003 it has been Department of Health policy that all adult service users should be asked about experiences of violence and abuse in mental health assessments. Yet actually disclosing experiences of violence and abuse can be very difficult. Survivors can feel a deep sense of shame and responsibility for the abuse they have experienced – feelings that are often strategically encouraged by their abusers (Clark and Quadara, 2010). These feelings can be compounded by unhelpful responses from professionals when they try to disclose (Imkaanetal, 2014). And survivors consistently say that disclosure has to be ‘at the right time for them’, which may be immediately or many years after the abuse (McNaughton Nicholls, 2012). In this briefing paper we present findings from research funded by the Department of Health Policy Research Programme on responding effectively to the needs of survivors of violence and abuse: the REVA study. The study included specifically asking survivors of violence and abuse about their views on routine enquiry, their experiences of disclosing abuse and their recommendations for how staff should ask clients about abuse