Tailoring C-H amination activity via modification of the triazole-derived carbene ligand.

Two new C,O-bidentate chelating triazolylidene-phenolate ligands were synthesized that feature a diisopropylphenyl (dipp) and an adamantyl (Ad) substituent respectively on the triazole scaffold. Subsequent metalation afforded iron(II) complexes [Fe(C^O)2] that are active catalysts for the intramolecular C-H amination of organic azides. When compared to the parent complex containing a triazolylidene with a mesityl substituent (Mes) the increased steric bulk led to slightly lower activity (TOFmax = 23 h-1vs. 30 h-1), however selectivity towards pyrrolidine formation increases from 92% up to >99%. Kinetic studies indicate that the mechanism is similar in all three complexes and includes a half-order dependence in [Fe(C^O)2], congruent with the involvement of a dimetallic catalyst resting state within this catalyst class. Structural analysis suggests that enhanced bulkiness disfavors N2 loss and nitrene formation, yet shields the nitrene from intermolecular processes and thus favors intramolecular nitrene insertion into the C-H bond. This model rationalizes the high selectivity and the lower reaction rate observed with dipp and with Ad substituents on the ligand

“Now I know I need to be very patient and open-minded to understand others”: Intercultural learning during an intensive study programme

This article reflects on aspects of the intercultural learning of a group of forty-one students, from seven European countries, engaged in an Intensive Study Programme as part of the Erasmus+ Strategic Partnership for Higher Education project “Teachers Competencies for Social Inclusion of Migrants and Refugees in Early Childhood Education (BE IN)”. In particular, it considers the factors that enabled the students to work together successfully, in transnationalgroups, during the two-week Intensive Study Programme (ISP.) Questionnaires were used to gather data about the students’ perceptions of their intercultural learning. Analysis of student feedback reveals their approaches to cultural disequilibrium and explores some of the factors that supported them to achieve group harmony and programme outcomes. The conclusion makes recommendations for those planning ISPs in the future

libEnsemble: A Library to Coordinate the Concurrent Evaluation of Dynamic Ensembles of Calculations

Almost all applications stop scaling at some point; those that don't are seldom performant when considering time to solution on anything but aspirational/unicorn resources. Recognizing these tradeoffs as well as greater user functionality in a near-term exascale computing era, we present libEnsemble, a library aimed at particular scalability- and capability-stretching uses. libEnsemble enables running concurrent instances of an application in dynamically allocated ensembles through an extensible Python library. We highlight the structure, execution, and capabilities of the library on leading pre-exascale environments as well as advanced capabilities for exascale environments and beyond

Value-adding to health professional student placement experiences: Enhancing work readiness and employability through a rural community engagement program

Enriching health professional students’ placement experiences through targeted community-engagement has the potential to help develop their preparedness to provide healthcare to the broader community. The program, developed in 2011, consisted of short, extracurricular community-engaged learning experiences integrated with the students’ professional placements. The aim of this study was to investigate whether the program was adding to the students’ rural health placement experiences based on perceptions of both the students themselves and UONDRH staff. A mixed methods approach used a student survey (n = 96), which included both closed and open-ended questions, and semi-structured interviews with staff members involved in delivery of the community engagement program (n = 15). Data were explored together for intersections and commonalities. The overarching key concept was ‘Enhancing Work Readiness and Employability’. Both student and staff perceived that students’ participation in community engagement improved their employment prospects. Three themes that emerged from the data, which underpinned and supported the key concept. They were: ‘Expanding professional practice capabilities’; ‘Building confidence and showing motivation’ and ‘Better understanding the nature of rural practice’,   The results of this study provide support to the notion that there was value for students in this form of short-term, community engagement activities, many of which could be readily integrated into existing health professional education programs with considerable benefits. . It would also lend itself to other non-health professional programs, such as law, journalism or business studies, as a means of broadening the students’ perspectives beyond the limits of their own professional horizons

Boston Hospitality Review: Winter 2013

Lodging Update: Portland, Maine by Rachel Roginsky and Matthew Arrants -- From Boston to the Balkans: Olmsted’s Emerald Legacy by Christina Luke -- An Important Arrival: Te Anatomy of a Vintage Advertisement by Bradford Hudson -- The Historical Origins of Business Statistics and a Current Application in Lodging Forecasting by Barry A.N. Bloom -- Building Hotel Revenues through Tourism by John D. Murtha -- Revisiting the Glass Ceiling: Career Progression for Women in the Hotel Industry by Zoe H

Lateglacial and Early Holocene palaeoenvironmental change and human activity at Killerby Quarry, North Yorkshire, UK

The hunter-gatherers that entered the British peninsula after ice-retreat were exploiting a dynamic, rapidly changing environment. Records of vegetation change and human occupation during the Lateglacial to Early Holocene in northern Britain are more commonly found at upland and cave sites. However, recent research highlights many areas of the Swale–Ure Washlands that preserve extensive environmental sequences in low-lying ice-wastage basins, channels and depressions. The Lateglacial–Early Holocene environment of Killerby Quarry, North Yorkshire, is investigated here using a multi-proxy approach of sedimentary ancient DNA (sedaDNA), pollen, sedimentological (geochemistry and portable optically stimulated luminescence), and rare and well-preserved archaeology (Lavvu structures and lithics). Results show that the wetland basins and kettleholes were small lakes or ponds in the Lateglacial surrounded by sedge-fen and birch woodland. A gradual (centennial scale) succession to reed-swamp and then marsh is seen by the Early Holocene. This environment formed the resource-scape for hunter-gatherer transitory settlement in both the Lateglacial (Late Upper Palaeolithic) and Holocene (Early Mesolithic), attracted by the rich communities of pond-related flora and fauna as well as easy strategic landscape access by way of the River Swale, an arterial route through the landscape connecting the North Sea Basin with the Pennine uplands via the palaeolakes around Killerby

Improving Access to Antimicrobial Prescribing Guidelines in 4 African Countries: Development and Pilot Implementation of an App and Cross-Sectional Assessment of Attitudes and Behaviour Survey of Healthcare Workers and Patients

martphone apps have proven to be an effective and acceptable resource for accessing information on antimicrobial prescribing. The purpose of the study is to highlight the development and implementation of a smartphone/mobile app (app) for antimicrobial prescribing guidelines (the Commonwealth Partnerships for Antimicrobial Stewardship—CwPAMS App) in Ghana, Tanzania, Uganda and Zambia and to evaluate patients’ and healthcare providers’ perspectives on the use of the App in one of the participating institutions. Two structured cross-sectional questionnaires containing Likert scale, multiple-choice, and open-ended questions were issued to patients and healthcare workers six months after the introduction of the app at one of the hospital sites. Metrics of the use of the app for a one-year period were also obtained. Download and use of the app peaked between September and November 2019 with pharmacists accounting for the profession that the most frequently accessed the app. More than half of the responding patients had a positive attitude to the use of the app by health professionals. Results also revealed that more than 80% of health care workers who had used the CwPAMS App were comfortable using a smartphone/mobile device on a ward round, considered the app very useful, and found it to improve their awareness of antimicrobial stewardship, including documentation of the indication and duration for antimicrobials on the drug chart. It also encouraged pharmacists and nurses to challenge inappropriate antimicrobial prescribing. Overall, our findings suggest that its use as a guide to antimicrobial prescribing sparked positive responses from patients and health professionals. Further studies will be useful in identifying the long-term consequences of the use of the CwPAMS App and scope to implement in other settings, in order to guide future innovations and wider us

A Bayesian constitutive model selection framework for biaxial mechanical testing of planar soft tissues: application to porcine aortic valves

A variety of constitutive models have been developed for soft tissue mechanics. However, there is no established criterion to select a suitable model for a specific application. Although the model that best fits the experimental data can be deemed the most suitable model, this practice often can be insufficient given the inter-sample variability of experimental observations. Herein, we present a Bayesian approach to calculate the relative probabilities of constitutive models based on biaxial mechanical testing of tissue samples. 46 samples of porcine aortic valve tissue were tested using a biaxial stretching setup. For each sample, seven ratios of stresses along and perpendicular to the fiber direction were applied. The probabilities of eight invariant-based constitutive models were calculated based on the experimental data using the proposed model selection framework. The calculated probabilities showed that, out of the considered models and based on the information available through the utilized experimental dataset, the May–Newman model was the most probable model for the porcine aortic valve data. When the samples were grouped into different cusp types, the May–Newman model remained the most probable for the left- and right-coronary cusps, whereas for non-coronary cusps two models were found to be equally probable: the Lee–Sacks model and the May–Newman model. This difference between cusp types was found to be associated with the first principal component analysis (PCA) mode, where this mode’s amplitudes of the non-coronary and right-coronary cusps were found to be significantly different. Our results show that a PCA-based statistical model can capture significant variations in the mechanical properties of soft tissues. The presented framework is applicable to any tissue type, and has the potential to provide a structured and rational way of making simulations population-based

Surgical treatments for women with stress urinary incontinence : a systematic review of economic evidence

Acknowledgements We would like to acknowledge all those involved in the wider study exploring the effectiveness and cost-effectiveness of surgical treatments for women with stress urinary incontinence. Funding This research was commissioned by the NIHR HTA Programme as project number 15/09/06. The views expressed are those of the authors and not necessarily those of the NHS, the NIHR or the Department of Health and Social Care, UK. The funders were not actively involved in the research process at any stage. The study design, collection, analysis and interpretation of data, the writing of the manuscript and the decision to submit it for publication were all performed independent of the funders.Peer reviewedPublisher PD