14,472 research outputs found

    Maximal LpLqL^p-L^q regularity to the Stokes Problem with Navier boundary conditions

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    We prove in this paper some results on the complex and fractional powers of the Stokes operator with slip frictionless boundary conditions involving the stress tensor. This is fundamental and plays an important role in the associated parabolic problem and will be used to prove maximal LpLqL^{p}-L^{q} regularity results for the non-homogeneous Stokes problem

    Models simulation and interoperability using MDA and HLA

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    In the manufacturing context, there have been numerous efforts to use modeling and simulation tools and techniques to improve manufacturing efficiency over the last four decades. While an increasing number of manufacturing system decisions are being made based on the use of models, their use is still sporadic in many manufacturing environments. Our paper advocates for an approach combining MDA (model driven architecture) and HLA (High Level Architecture), the IEEE standard for modeling and simulation, in order to overcome the deficiencies of current simulation methods at the level of interoperability and reuse.Comment: 8 page

    International Field Trips - the Tourism and Entertainment Management Field Trip to The Gambia, West Africa

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    Since 2008 students from the Tourism & Entertainment Management Subject Group at Leeds Metropolitan University have been offered the opportunity to spend seven nights in The Gambia, West Africa on an educational field visit. The purpose of the field visit is to investigate how tourism and entertainment can contribute to economic and social development in one of the poorest countries in the world. The field trip is extra-curricular and as such is an optional experience for the students. While the study experience is not assessed, it is hoped that the students will use the learning they gain from their time in The Gambia in the assignments and projects on their course. To date three field trips have been organised and each year the number of students selecting this study abroad opportunity has increased. Thirty-two students (6% of our total student population in Tourism and Entertainment Management) joined the field trip in February 2010, with the majority of students being from our BA (Hons) International Tourism Management degree (primarily at Level 4) and the second largest cohort being from BA (Hons) Entertainment Management (Level 6). The students fund the cost of the field trip themselves

    A Review on the Bulk and Surface Chemistry of Iron in Atmospherically-relevant Systems Containing Humic Like Substances (HULIS)

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    As the fourth most abundant element by mass in the Earth’s crust, iron is ubiquitous and its chemistry is rich and interdisciplinary in nature. This review synthesizes the current state of knowledge of iron chemistry in multicomponent atmospheric aerosols, which is also applicable to other atmospherically-relevant systems that include iron-containing anthropogenic nanodust, ocean surfaces and buildings. Because of the abundance of humic-like substances (HULIS) in these systems, studies on their chemistry with iron and those used as models for HULIS are the focus of this review. Findings from field measurements and laboratory studies are summarized to highlight major themes in iron chemical reactivity that varies depending on the solubility, redox conditions, absence and presence of UV-visible light and reactive oxygen species, pH, and temperature. The review also highlights key differences between bulk and surface chemistry of iron-containing materials, which varies considerably because of the structure of interfacial water and solvent cage effect. Additional laboratory, field, and modeling studies are needed to better understand the contributions of transition metals chemistry to secondary organic aerosol formation and chemistry, uptake, and release of trace gas phase species. This information will improve the predictive power of models that incorporate aerosols chemistry and physics

    Complex regional pain syndrome in a competitive athlete and regional osteoporosis assessed by dual-energy X-ray absorptiometry: a case report.

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    Dual-energy X-ray absorptiometry is rarely utilized in the clinical care of patients with complex regional pain syndrome, but may be useful for the non-invasive determination of regional bone fragility and fracture risk, as well as muscular atrophy and regional body composition. This is the first report in the literature of complex regional pain syndrome and musculoskeletal co-morbidities in an athlete, and is the first to focus on dual-energy X-ray absorptiometry for the clinical assessment of complex regional pain syndrome
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