Fundamental investigation of ultraviolet radiation effects in polymeric film-forming materials

A literature search from 1958 to present was conducted on the effect of ultraviolet radiation on polymeric materials, with particular emphasis on vacuum photolysis, mechanisms of degradation, and energy transfer phenomena. The literature from 1958 to 1968 was searched manually, while the literature from 1968 to present was searched by using a computerized keyword system. The primary objective was to provide the necessary background information for the design of new or modified materials with improved stability to the vacuum-radiation environment of space

Recommendations from recent graduates in medicine, nursing and pharmacy on improving interprofessional education in university programs: A qualitative study

Background: Interprofessional education (IPE) has been recognized as an innovative approach for the development of a collaborative, practice-ready health workforce, but is not used consistently in undergraduate health professional programs. We sought to explore the reflections of graduates on the IPE experiences they had during their undergraduate education and training. It was anticipated that having completed their pre-vocational education and spent up to two years working in a clinical environment, recent graduates would be well-placed to provide insights into the value of the IPE opportunities they had, and to suggest approaches for improving these opportunities in undergraduate programs. Methods. This study was part of a larger research project (Interprofessional Education for the Quality use of Medicines; IPE for QuM) which used focus groups as part of an interpretive research design to inform other aspects of the research. Here, we report on focus groups with recent graduates recruited from area health services across Australia. Results: Sixty-eight recent graduates working in New South Wales, Western Australia, and Tasmania participated in 12 focus group sessions. In this paper, we report on new graduates' reflections on their experiences of IPE as part of their university degree, as well as their recommendations to improve interprofessional education before graduation. The new graduates were unanimous in valuing IPE from their current perspective of being in the health workforce. Most IPE experiences recalled were regarded as positive, but those valued most highly were experiences that involved genuine engagement and opportunities to interact with students in other professions working on a relevant problem. Clinical placement was a missed opportunity with few structured meaningful interprofessional learning experiences. Surprisingly there was little social contact between professions in universities even when programs were co-located, thus reinforcing professional silos. Conclusions: The graduates provided many insightful reflections about the value of university-based IPE and their preparedness for clinical practice. Although universally acclaimed as a good idea there is much room for improvement. We put forward a set of suggestions to improve IPE and guide the design of future IPE efforts. © 2014 Gilligan et al.; licensee BioMed Central Ltd

Host Growth Can Cause Invasive Spread of Crops by Soilborne Pathogens

Invasive soilborne plant pathogens cause substantial damage to crops and natural populations, but our understanding of how to prevent their epidemics or reduce their damage is limited. A key and experimentally-tested concept in the epidemiology of soilborne plant diseases is that of a threshold spacing between hosts below which epidemics (invasive spread) can occur. We extend this paradigm by examining how plant-root growth may alter the conditions for occurrence of soilborne pathogen epidemics in plant populations. We hypothesise that host-root growth can 1) increase the probability of pathogen transmission between neighbouring plants and, consequently, 2) decrease the threshold spacing for epidemics to occur. We predict that, in systems initially below their threshold conditions, root growth can trigger soilborne pathogen epidemics through a switch from non-invasive to invasive behaviour, while in systems above threshold conditions root growth can enhance epidemic development. As an example pathosystem, we studied the fungus Rhizoctonia solani on sugar beet in field experiments. To address hypothesis 1, we recorded infections within inoculum-donor and host-recipient pairs of plants with differing spacing. We translated these observations into the individual-level concept of pathozone, a host-centred form of dispersal kernel. To test hypothesis 2 and our prediction, we used the pathozone to parameterise a stochastic model of pathogen spread in a host population, contrasting scenarios of spread with and without host growth. Our results support our hypotheses and prediction. We suggest that practitioners of agriculture and arboriculture account for root system expansion in order to reduce the risk of soilborne-disease epidemics. We discuss changes in crop design, including increasing plant spacing and using crop mixtures, for boosting crop resilience to invasion and damage by soilborne pathogens. We speculate that the disease-induced root growth observed in some pathosystems could be a pathogen strategy to increase its population through host manipulation. © 2013 Leclerc et al.ML thanks the Institut Technique franc¸ais de la Betterave industrielle (ITB) for funding this project. CAG and JANF were funded by the UK’s Biotechnology and Biological Sciences Research Council (BBSRC). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript

Central Office Leaders' Role in Supporting Principals' Instructional Expectations in a Turnaround District

Thesis advisor: Martin ScanlanThis qualitative case study explored the role of central office leaders as they supported principals’ development of high instructional expectations in the Lawrence Public Schools. One of the key strategies of central office transformation is the creation of assistance relationships with principals, which serves as the conceptual framework for this study. Data were gathered from interviews with central office leaders and principals as well as a document review. The results of the study found that central office leaders employed high quality practices that strengthened principals’ instructional leadership capacity and raised instructional expectations within schools and of teachers. Principals reported that having central office support through systems and structures, curriculum, culture and working conditions created heightened instructional expectations and contributed to their growth as instructional leaders. The central office leaders and principals reported the strong culture of assistance relationships contributed to increased expectations and improved student outcomes. Recommendations include continual examination of assistance relationships among central office leaders in support of principals in the context of a turnaround district. Future researchers may continue to contribute to the growing body of literature by examining these findings and offering a longitudinal view of this practice. This strand’s findings can serve as a guide for the practice of central office leaders who are working with principals to raise and create heightened instructional expectations required for improving achievement and equity system-wide in habitually underperforming schools and districts across our country.Thesis (EdD) — Boston College, 2018.Submitted to: Boston College. Lynch School of Education.Discipline: Educational Leadership and Higher Education

Epidemics in Networks of Spatially Correlated Three-dimensional Root Branching Structures

Using digitized images of the three-dimensional, branching structures for root systems of bean seedlings, together with analytical and numerical methods that map a common 'SIR' epidemiological model onto the bond percolation problem, we show how the spatially-correlated branching structures of plant roots affect transmission efficiencies, and hence the invasion criterion, for a soil-borne pathogen as it spreads through ensembles of morphologically complex hosts. We conclude that the inherent heterogeneities in transmissibilities arising from correlations in the degrees of overlap between neighbouring plants, render a population of root systems less susceptible to epidemic invasion than a corresponding homogeneous system. Several components of morphological complexity are analysed that contribute to disorder and heterogeneities in transmissibility of infection. Anisotropy in root shape is shown to increase resilience to epidemic invasion, while increasing the degree of branching enhances the spread of epidemics in the population of roots. Some extension of the methods for other epidemiological systems are discussed.Comment: 21 pages, 8 figure

Negotiating professional and social voices in research principles and practice

This paper draws on work conducted for a qualitative interview based study which explores the gendered racialised and professional identifications of health and social care professionals. Participants for the project were drawn from the professional executive committees of recently formed Primary Care Trusts. The paper discusses how the feminist psychosocial methodological approach developed for the project is theoretically, practically and ethically useful in exploring the voices of those in positions of relative power in relation to both health and social care services and the social relations of gender and ethnicity. The approach draws on psychodynamic accounts of (defended) subjectivity and the feminist work of Carol Gilligan on a voice-centred relational methodology. Coupling the feminist with the psychosocial facilitates an emphasis on voice and dialogic communication between participant and researcher not always captured in psychosocial approaches which tend towards favouring the interviewer as ‘good listener’. This emphasis on dialogue is important in research contexts where prior and ongoing relationships with professional participants make it difficult and indeed undesirable for researchers to maintain silence

Pseudoconvex domains spread over complex homogeneous manifolds

Using the concept of inner integral curves defined by Hirschowitz we generalize a recent result by Kim, Levenberg and Yamaguchi concerning the obstruction of a pseudoconvex domain spread over a complex homogeneous manifold to be Stein. This is then applied to study the holomorphic reduction of pseudoconvex complex homogeneous manifolds X=G/H. Under the assumption that G is solvable or reductive we prove that X is the total space of a G-equivariant holomorphic fiber bundle over a Stein manifold such that all holomorphic functions on the fiber are constant.Comment: 21 page

NASA MSFC Status Update

No abstract availabl

Beyond Resilience and Burnout: The Need for Organizational Change to Promote Humanistic Practice and Teaching in Healthcare

Rapid changes in healthcare organization and practice environments, increasingly driven by business models and commercial interests, are associated with widespread burnout and dissatisfaction among healthcare professionals and pose barriers to humanistic relationship-centered quality care. Studies show burnout and significant stress currently affect over half of US physicians and nurses. Clinicians’ ability to provide compassionate care is significantly challenged. Most solutions to date have included individual interventions designed to enhance well-being and promote resilience. We examined organizational factors that inhibit or promote humanistic practice by faculty physicians in today’s healthcare environment. In this qualitative study, physician faculty who completed a one-year faculty development program in humanism at eight US academic medical centers provided written answers to two open-ended questions: a) What institutional or specific organizational unit-related factors promote humanism for you and others? b) What institutional or specific organizational unit-related factors inhibit or pose barriers, to humanism for you and others? 74% (68/92) of the physicians participated. The constant comparative method was used to analyze responses. We found that organizational culture was the central theme. Motivators of humanism included leadership supportive of humanistic practice, responsibility to role model humanism, organized activities promoting humanism, and practice structures that facilitate humanism. Factors that inhibited humanism included “top down” organizational culture, non-supportive leadership, time and bureaucratic pressures, and non-facilitative practice structures. Our findings suggest that organizational culture is, at a minimum, equally important as individual interventions. We describe features of organizational culture that reinforce humanistic practice and care in healthcare institutions and offer recommendations for organizational change that support the primacy of humanistic, compassionate, high quality patient care. 

The behavioural wedge

When nations fail to agree, can individual citizens make a difference? The third of our post-Copenhagen features is by Jonathan Gilligan, Thomas Dietz, Gerald T. Gardner, Paul C. Stern , and Michael P. Vandenbergh . They look at the effects that voluntary actions by individuals can have, and at the policies that can best encourage such actions.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/79202/1/j.1740-9713.2010.00405.x.pd