3,245 research outputs found
Controlled radical polymerization of vinyl acetate mediated by a bis(imino)pyridine vanadium complex
Valuing improvements in biodiversity due to controls on atmospheric nitrogen pollution
Atmospheric nitrogen pollution has severe impacts on biodiversity, but approaches to value them are limited.
This paper develops a spatially explicit methodology to value the benefits from improvements in biodiversity
resulting from current policy initiatives to reduce nitrogen emissions. Using the UK as a case study, we quantify
nitrogen impacts on plant diversity in four habitats: heathland, acid grassland, dunes and bogs, at fine spatial
resolution. Focusing on non-use values for biodiversity we apply value-transfer based on household's willingness
to pay to avoid changes in plant species richness, and calculate the benefit of projected emission declines of 37%
for nitrogen dioxide (NO2) and 6% for ammonia (NH3) over the scenario period 2007–2020. The annualised
benefit resulting from these pollutant declines is £32.7m (£4.4m to £109.7 m, 95% Confidence Interval), with
the greatest benefit accruing from heathland and acid grassland due to their large area. We also calculate damage
costs per unit of NO2 and NH3 emitted, to quantify some of the environmental impacts of air pollution for
use alongside damage costs for human health in policy appraisal. The benefit is £103 (£33 to £237) per tonne of
NO2 saved, and £414 (£139 to £1022) per tonne of NH3 saved
Network learning in a high-tech SME: expanding entrepreneurial capabilities
This paper examines the process of learning, both technological and organizational,
which has taken place in this small-sized firm located in a relatively remote area of
northwest England. With relations to supply chain management and innovation
network theory, it is argued that it is the relational elements of inter-firm transactions
and interactions that provide organisations with opportunities to expand their
capability. The importance of supply chain management, therefore, is that it provides
a process in which closer relations are both desirable and can potentially create
opportunities to grow organisational capability. The paper is focused on the
following aspects of learning: the first is the evolutionary nature of the accumulation
of technological capability; the second is the firm-specific absorptive capability
developed through its close relationship with BNFL and other firms within the
supply chain. The case study organisation is instrumental in building a network of
suppliers and customers, which has enhanced the learning opportunities and
capabilities of both. In doing so, it has created virtual clusters of innovation through
the supply network that reach well beyond the traditional regional institutional
support mechanisms
Eliminating the effects of motion during radiofrequency lesion delivery using a novel contact-force controller.
INTRODUCTION: Catheter-tissue contact force is a determinant of radiofrequency (RF) ablation lesion effectiveness. However, ablation on a beating heart is subject to force variability, making it difficult to optimally deliver consistently durable and transmural lesions. This work evaluates improvements in contact force stability and lesion reproducibility by using a catheter contact-force controller (CFC) during lesion delivery in vitro and in vivo.
METHODS AND RESULTS: Using a sheath and force-sensing catheter, an experienced operator attempted to maintain a constant force of 20 g at targets within the atria and left ventricle of a pig manually and using the CFC; the average force and contact-force variation (CFV) achieved using each approach were compared. Ablation lesions (20 W, 30 seconds, 17 mL/min irrigation) were created in bovine tissue samples mounted on a platform programmed to reproduce clinically relevant motion. CFC-assisted lesions were delivered to stationary and moving tissue with forces of 5 to 35 g. Mimicking manual intervention, lesions were also delivered to moving tissue while the CFC was disabled. Resultant lesion volumes were compared using two-way analysis of variance. When using the CFC, the average force was within 1 g of the set level, with a CFV less than 5 g, during both in vitro and in vivo experiments. Reproducible and statistically identical (P = .82) lesion volumes proportional to the set force were achieved in both stationary and moving tissue when the CFC was used.
CONCLUSIONS: CFC assistance maintains constant force in vivo and removes effect of motion on lesion volume during RF lesion delivery
Working Together to Promote Diabetes Control: A Practical Guide for Diabetes Health Care Providers in Establishing a Working Alliance to Achieve Self-Management Support
The quality of the "patient-carer" relationship is the foundation of self-management support and has been shown to influence treatment outcome in relation to psychological and somatic illness, including diabetes. It has long been accepted within applied psychology that the quality of the client-therapist relationship-termed the working alliance-is of central importance to treatment outcome and may account for a significant degree of the overall treatment effect. Diabetes healthcare providers have recently expressed a need for further training in communication techniques and in the psychological aspects of diabetes. Could we take a page from the psychological treatment manual on working alliance in therapy to guide the diabetes healthcare provider in their role of supporting the person with diabetes achieve and maintain better metabolic control? This paper examines the role of the working alliance in diabetes care and offers a practical guide to the diabetes healthcare provider in establishing a working alliance with the person with diabetes in managing diabetes
Working Together to Promote Diabetes Control: A Practical Guide for Diabetes Health Care Providers in Establishing a Working Alliance to Achieve Self-Management Support
The quality of the “patient-carer” relationship is the foundation of self-management support and has been shown to influence treatment outcome in relation to psychological and somatic illness, including diabetes. It has long been accepted within applied psychology that the quality of the client-therapist relationship—termed the working alliance—is of central importance to treatment outcome and may account for a significant degree of the overall treatment effect. Diabetes healthcare providers have recently expressed a need for further training in communication techniques and in the psychological aspects of diabetes. Could we take a page from the psychological treatment manual on working alliance in therapy to guide the diabetes healthcare provider in their role of supporting the person with diabetes achieve and maintain better metabolic control? This paper examines the role of the working alliance in diabetes care and offers a practical guide to the diabetes healthcare provider in establishing a working alliance with the person with diabetes in managing diabetes
Faecal immunochemical testing for haemoglobin in detecting bowel polyps in symptomatic patients: multicentre prospective cohort study
BACKGROUND: Measurement of faecal haemoglobin using faecal immunochemistry testing is recommended in patients presenting with symptoms suspicious for colorectal cancer, to aid in triage and prioritization of definitive investigations. While its role in colorectal cancer has been extensively investigated, the ability of faecal immunochemistry testing to detect adenomas in symptomatic patients is unclear. METHODS: A multicentre prospective observational study was conducted between April 2017 and March 2019, recruiting adults from 24 hospitals across England and 59 general practices in London who had been urgently referred with suspected colorectal cancer symptoms. Each patient provided a stool sample for faecal immunochemistry testing, in parallel with definitive investigation. A final diagnosis for each patient was recorded, including the presence, size, histology, and risk type of colonic polyps. The outcome of interest was the sensitivity of faecal immunochemistry testing in detecting the presence of adenomas. RESULTS: Of 3496 patients included in the analysis, 553 (15.8 per cent) had polyps diagnosed. Sensitivity of faecal immunochemistry testing for polyp detection was low across all ranges; with a cut-off for faecal haemoglobin of 4 µg/g or lower, sensitivity was 34.9 per cent and 46.8 per cent for all polyp types and high-risk polyps respectively. The area under the receiver operating characteristic curve in detection probability was relatively low for both intermediate-risk (0.63) and high-risk polyps (0.63). CONCLUSION: While faecal immunochemistry testing may be useful in prioritizing investigations to diagnose colorectal cancer, if used as a sole test, the majority of polyps would be missed and the opportunity to prevent progression to colorectal cancer may be lost
Population Pharmacokinetic and Pharmacodynamic Modeling for Assessing Risk of Bisphosphonate-related Osteonecrosis of the Jaw
Objective: We hypothesized that patients with bisphosphonate (BP)-related osteonecrosis of the jaw (BRONJ) accumulate higher levels of BP in bone than those without BRONJ. Study Design: Using the Pmetrics package and published data, we designed a population pharmacokinetic model of pamidronate concentration in plasma and bone and derived a toxic bone BP threshold of 0.2 mmol/L. With the model, and using patient individual BP duration and bone mineral content estimated from lean body weight, we calculated bone BP levels in 153 subjects. Results: Mean bone BP in 69 BRONJ cases was higher than in 84 controls (0.20 vs 0.10 mmol/L, P \u3c 0.001), consistent with the toxic bone threshold of 0.2 mmol/L. BRONJ was also associated with longer duration BP therapy (5.3 vs 2.7 years, P \u3c 0.001), older age (76 vs 70 years, P \u3c 0.001), and Asian race (49% vs 14%, P \u3c 0.001). Conclusions: Our model accurately discriminated BRONJ cases from controls among patients on BP therapy. © 2013 Elsevier Inc
The Passive Journalist: How sources dominate the local news
This study explores which sources are “making” local news and whether these sources are simply indicating the type of news that appears, or are shaping newspaper coverage. It provides an empirical record of the extent to which sources are able to dominate news coverage from which future trends in local journalism can be measured. The type and number of sources used in 2979 sampled news stories in four West Yorkshire papers, representing the three main proprietors of local newspapers in the United Kingdom, were recorded for one month and revealed the relatively narrow range of routine sources; 76 per cent of articles cited only a single source. The analysis indicates that journalists are relying less on their readers for news, and that stories of little consequence are being elevated to significant positions, or are filling news pages at the expense of more important stories. Additionally, the reliance on a single source means that alternative views and perspectives relevant to the readership are being overlooked. Journalists are becoming more passive, mere processors of one-sided information or bland copy dictated by sources. These trends indicate poor journalistic standards and may be exacerbating declining local newspaper sales
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