829 research outputs found
The history of Pembrokeshire,
No full text"The author had projected a history that would have dealt with the county to the close of the nineteenth century. His outline included three chapters ... Georgian Pembrokeshire, The landing of the French, and Modern days, which he did not live to write." The incomplete manuscript was pub. after his death under the general superintendence of T. C. Rees. cf. Foreword (by J. and M. Phillips)Mode of access: Internet
Nitrogen fixation in the western English Channel (NE Atlantic Ocean)
No full textIn temperate Atlantic waters (18.8 to 20.1°C), biological nitrogen fixation has beendemonstrated by 2 independent measurements: 15N-N2 incorporation and nifH identification in theDNA and expressed messenger RNA (mRNA). At 2 stations in the western English Channel, bulkwaters were incubated with 15N-N2. At the high levels of particulate nitrogen (?11.5 ?mol N l–1),absolute fixation rates of 18.9 ± 0.01 and 20.0 nmol N l–1d–1 were determined. While a caveat mustaccompany the magnitude of the rates presented due to the limited number of data, the presence andactivity of diazotrophic organisms in these waters is of ecological significance and may affect currentattitudes to nitrogen and carbon budgets. In particular, our estimate of the rate of N fixation(0.35 mmol N m–2 d–1) is comparable to that of denitrification rates in UK shelf seas. Molecular analysisidentified a diversity of expressed nifH genes, and 21 different prokaryotic nifH transcripts wereidentified
Protocol for the United Kingdom Rotator Cuff Study (UKUFF) : a randomised controlled trial of open and arthroscopic rotator cuff repair
No full textThis project was funded by the NIHR Health Technology Assessment programme (project number 05/47/02). J. L. Rees has received a grant from Oxford University which is related to this paper. J. Dawson reports that Oxford University has received a grant from HTA which is related to this paper, as well as a study grant.Peer reviewe
Electrochemical recycling of rare earth elements from NdFeB magnet waste
No full textRare earth elements (REEs), along with other metals, will play a pivotal role in the transition towards a low-carbon economy. Primary mining of REEs consists of multiple steps, is energy intensive and has an adverse environmental impact. Thus, the current scenario of “use and throw” of REEs after a single use in a product is untenable. Furthermore, the REEs are classified as critical metals by the US and EU due to the monopoly of China over REE production. Thus, recycling REEs from secondary resources and end-of-life (EOL) waste products can help effectuate a circular economy by a) reducing the environmental impact of primary mining, b) reducing the dependency on imports and formulating a secure supply chain, c) avoiding landfilling and incineration...(OLD) MSE-
Obstetric anal sphincter injuries before and after the introduction of the Episcissors-60: A multi-centre time series analysis.
No full textAbstract
Obstetric anal sphincter injuries before and after the introduction of the Episcissors-60: A multi-centre time series analysis.
Paul Ayuk , Allison Farnworth , Jon Rees , Aethele Khunda , Dawn Edmundson , Vinita Raheja , Aarti Ullal , Velauthapillai Ravimohan , Ena Lu , S C Robson
Objective
To investigate the impact of the Episcissors-60 on obstetric anal sphincter injury (OASI) rates.
Study design
Observational multi-centre time series analysis at four maternity units in the North-East of England. The main outcome measures were obstetric anal sphincter injury rates and delivery blood loss
Results
Data were analysed for women who had a vaginal birth of a singleton pregnancy before (11,192) and after (8,064) the introduction of the Episcissors-60. There were 2115 episiotomies before and 1498 after the introduction of the Episcissors-60, of which 1311 (87.5%) were undertaken with the Episcissors-60, 114 (7.6%) with other scissors and the scissors used were not stated in 73 (4.8%) women. There was no significant association between the introduction of Episcissors-60 and the performance of an episiotomy (χ2 = 0.006, p = 0.94). Episiotomy was associated with a significant reduction in OASI rates (1.9% Vs 2.8%, odds ratio = 0.67 [0.51 – 0.86]; p = 0.001). There was no significant association between the introduction of the Episcissors-60 and the occurrence of OASIs in all women (χ2 = 0.6, p= 0.46) or in women who had an episiotomy (χ2 = 0.20, p = 0.71). In women who had an episiotomy, the mean estimated delivery blood loss was 550.3 ± 8.2 ml before and 598.8 ± 10.9 ml after the introduction of the Episcissors-60 (p < 0.001).
Conclusion
Introduction of the Episcissors-60 was not associated with a change in OASI or episiotomy rates but may be associated with a small increase in delivery blood loss.
Key words: Episcissors-60, obstetric anal sphincter injur
Social Support
No full textFirst paragraph: Flick through any autobiography of a celebrated athlete and you will find that one of its key themes is social support. Certainly there will be discussions of training and tactics, distress and disappointment, guts and glory. But the backdrop to all this is likely to be the support the athlete received from key individuals and groups along the way. The mother who drove them to training every day in the middle of winter, the coach who instilled a sense of self-discipline and pride, the backroom team who always had a kind word when things hadn’t gone quite to plan. This is beautifully exemplified by a legendary yet bitter-sweet moment from the 1992 Barcelona Olympics, where hot-favourite sprinter Derek Redmond from the United Kingdom tore his hamstring during the 400 meters semi-final. His father, Jim, jumped the balustrades and pushed past event officials to help his son cross the line and finish the race. We hobbled over the finishing line with our arms round each other, just me and my dad, the man I’m really close to, who’s supported my athletics career since I was seven years old. (Bos, 2017) Accounts such as this are also often filled with heroic examples of athletes going ‘above and beyond’ to provide support to others in their team — even to the extent of making personal sacrifices for the ‘greater good’. Consider the 2012 Tour de France, when Chris Froome gave up his opportunity to secure personal victory, instead opting to help his teammate Bradley Wiggins secure the coveted maillot jaune. Clearly, the role of socially supportive others, across both sport and life more generally, cannot be understated. For this reason, social support plays a key role in optimal functioning across a range of performance contexts — not only in sport, but also in the workplace, at school, or at home (Fletcher & Sarkar, 2012; Freeman & Rees, 2009; Sarkar & Fletcher, 2014). Indeed, work by the fourth author and his colleagues highlighted how supportive families, coaches, and networks are key to the development of super-elite athletes (Rees et al., 2016)
Morbidity and Mortality Weekly Report (MMWR)
No full textcdc:This corrects the article "Evaluation of Bronchoalveolar Lavage Fluid from Patients in an Outbreak of E-cigarette, or Vaping, Product Use\u2013Associated Lung Injury \u2014 10 States, August\u2013October 2019" in volume 68 on page 1040.In the report \u201cEvaluation of Bronchoalveolar Lavage Fluid from Patients in an Outbreak of E-cigarette, or Vaping, Product Use\u2013Associated Lung Injury \u2014 10 States, August\u2013October 2019\u201d names of the members of the Lung Injury Response Team and persons in Acknowledgments were omitted. Thenames are included below.Benjamin C. Blount, PhD1,*; Mateusz P. Karwowski, MD1,*; Maria Morel-Espinosa, PhD1; Jon Rees, PhD1; Connie Sosnoff, MA1; Elizabeth Cowan, PhD1; Michael Gardner, MS1; Lanqing Wang, PhD1; Liza Valentin-Blasini, PhD1; Lalith Silva, PhD1; Vi\u301ctor R. De Jesu\u301s, PhD1; Zsuzsanna Kuklenyik, PhD1; Cliff Watson, PhD1; Tiffany Seyler, PhD1; Baoyun Xia, PhD1; David Chambers, PhD1; Peter Briss, MD2; Brian A. King, PhD3; Lisa Delaney, MS4; Christopher M. Jones, PharmD, DrPH5; Grant T. Baldwin, PhD6; John R. Barr, PhD1; Jerry Thomas, MD1; James L. Pirkle, MD, PhD1; Lung Injury Response Tea
Recent advances in acid-free dissolution and separation of rare earth elements from the magnet waste
No full textThe availability of REEs is limiting the successful deployment of some environmentally friendly and energy-efficient technologies. In 2019, the U.S. generated more than 15.25 billion pounds of e-waste. Only ~15% of it was handled, leaving ~13 billion pounds of e-waste as potential pollutants. Of the 15% collected, the lack of robust technology limited REE recovery for re-use. Key factors that drive the recycling of permanent magnets based on rare earth elements (REEs) and the results of our research on magnet recycling will be discussed, with emphasis on neodymium and samarium-based rare earth permanent magnets.This article is published as Grace Inman, Denis Prodius, Ikenna C. Nlebedim. Recent advances in acid-free dissolution and separation of rare earth elements from the magnet waste. Clean Technologies and Recycling, 2021, 1(2): 112-123.
DOI: 10.3934/ctr.2021006.
Copyright 2021 The Author(s).
DOE Contract Number(s): AC02-07CH11358.
Posted with permission
FORCE CONSTANTS FROM RYDBERG-KLEIN-REES POTENTIAL ENERGY CURVES.
No full textAuthor Institution: Physics Department, Illinois Institute of TechnologyWe have calculated equilibrium force constants internuclear separation, U = potential energy, e = equilibrium] from the Rydberg-Klein-Rees potential energy curves for 11 diatomic molecules. The results are in good agreement with the values previously calculated from , which was derived from the harmonic potential energy function [c = speed of light in vacuum, classical vibrational frequency in cycles/sec for infinitesimal amplitudes, reduced mass]. This is as it should be since the force per unit displacement at should be the same for any valid potential energy curve. The values of for isotopes of these molecules were nearly the same as for the ordinary molecules. For HCI, the values were: microdynes/picometer. If the molecule were a harmonic oscillator, the force derivative function would be the same for all values of r, but for the actual molecule the values of this function vary with r. At ; at is the value of r at the inflection point i on the potential energy curve]. The average value of for the vibrational state v can be taken as the effective force constant in that vibrational state. We have calculated values of from the R-K-R curve of for several values of v. As v increases from 0 to 9, decreases from to . Effective force constants and for and were calculated for the 11 molecules. In all cases, and were larger than and smaller than observed wave number in cycles/cm]. For , the values are:
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