Alien Registration- Fairweather, John D. (Portland, Cumberland County)

https://digitalmaine.com/alien_docs/24511/thumbnail.jp

Alien Registration- Fairweather, John D. (Portland, Cumberland County)

https://digitalmaine.com/alien_docs/24511/thumbnail.jp

Alien Registration- Fairweather, John D. (Portland, Cumberland County)

https://digitalmaine.com/alien_docs/24511/thumbnail.jp

The Development of Careers Scotland’s Service Delivery Framework

This paper records the processes followed by Careers Scotland in differentiating the services offered to different groups of clients. It is designed to be of use both to Careers Scotland staff and to other organisations that are interested in exploring the adoption of similar models of service delivery

Benchmarking of CFD Modelling Closures for Two-Phase Turbulent Bubbly Flows

Eulerian-Eulerian computational fluid dynamic models are used in the prediction of multiphase gas-liquid flows in nuclear reactor thermal hydraulics and in many other chemical and process engineering applications. The modelling approach, based on the concept of interpenetrating continua, allows the calculation of complex and large-scale industrial flows with a relatively limited computational load. However, interfacial transfer processes need to be entirely modelled through numerous closure relations. A large number of different optimized closure sets are available, each often showing remarkable accuracy, but generally only over a few experimental data sets. This specificity makes it difficult to compare the overall accuracy of the models and obstructs the development of more general and robust approaches. In this paper, the bubbly flow models developed at the University of Leeds and the Helmholtz-Zentrum Dresden - Rossendorf are benchmarked against relevant experiments. These two research groups follow a similar modelling approach, aimed at identifying a single universal set of widely applicable closures. The models, implemented respectively in Star-CCM+ and CFX, are applied to a large selection of bubbly flows in different geometries. The main focus is on the momentum transfer, mainly responsible for the lateral bubble distribution in any flow, and on turbulence closures. Therefore, monodispersed bubbly flows that can be effectively characterized with a single average bubble diameter are selected. Overall, the models are found to be generally reliable and robust, and additional developments towards further improved accuracy, increased generality and the definition of a common unified set of model closures are identified. In future, additional benchmark exercises of this kind will be performed, and potentially the definition of proven sets of reference experiments will be recommended

An evaluation of the largest resource efficiency club programme in England (2005-2008) to underpin future design and delivery of a cost effective policy instrument.

In England, the Department of Environment, Food and Rural Affairs (Defra) allocated £5 million over three years from 2005 to 2008 to support the establishment of a wide range of innovative Resource Efficiency Clubs (RECs). During the funding period (2005 – 2008) the programme funded 70 RECs with 45 remaining active at the end of the three years (2008). Some 1,330 businesses were active in the 70 RECs with 1,014 providing data including potential and actual savings. In excess of £50 million of potential savings were identified and by the end of 2008 some £25 million were achieved. The total savings to total grant ratio for all RECs was, by 2008, some 5.8; this was in excess of the original ratio set by Defra. The Programme made clear to key decision makers that well designed RECs are a key policy instrument. The research showed that the future for RECs in England is uncertain and strategists should consider innovative ways to fund their continued contribution to national, regional and local practice

Engaging Undergraduates in Science Research: Not Just About Faculty Willingness.

Despite the many benefits of involving undergraduates in research and the growing number of undergraduate research programs, few scholars have investigated the factors that affect faculty members' decisions to involve undergraduates in their research projects. We investigated the individual factors and institutional contexts that predict faculty members' likelihood of engaging undergraduates in their research project(s). Using data from the Higher Education Research Institute's 2007-2008 Faculty Survey, we employ hierarchical generalized linear modeling to analyze data from 4,832 science, technology, engineering, and mathematics (STEM) faculty across 194 institutions to examine how organizational citizenship behavior theory and social exchange theory relate to mentoring students in research. Key findings show that faculty who work in the life sciences and those who receive government funding for their research are more likely to involve undergraduates in their research project(s). In addition, faculty at liberal arts or historically Black colleges are significantly more likely to involve undergraduate students in research. Implications for advancing undergraduate research opportunities are discussed

An X-ray Tomography Study of Gas Retention in Nuclear Legacy Waste

The retention and release of flammable gases from corroded Magnox sludge waste at Sellafield, UK and secondary reprocessing waste at Hanford, USA has significant economic and safety implications for decommissioning various nuclear legacy buildings. Magnesium hydroxide is the primary precipitation product from the corrosion of first generation nuclear fuel in the UK, with hydrogen gas produced as a reaction by-product. Depending on the bed microstructure, wettability and shear yield stress behaviour, some consolidated sediments of these corrosion products are able to trap a substantial volume of gas, sufficient in some instances to become buoyant with respect to a water supernatant, resulting in an undesirable upward transfer of radioactive material from the consolidated bed. These phenomena are investigated using the decomposition of hydrogen peroxide to produce oxygen bubbles within magnesium hydroxide soft sediments at laboratory scale. X-ray tomography analysis showed that high strength sediments of 1112 Pa shear yield stress supported much larger bubbles up to 20 mm equivalent spherical diameter than beds in the 7-234 Pa range, which demonstrated almost identical bubble size distributions across the range. The largest retained bubbles became progressively more distorted with increased sediment strength until the lateral cracks consistent with tensile fracture became apparent in the 1112 Pa bed. These cracks significantly limited the capacity for bed swell as gas diffusion along the cracks to the container walls provided a continuous escape route. The capacity for gas retention was also substantially reduced when gas generation was not homogeneous through the bed as localised gas generation promoted the formation of low density pathways, rich with micro-bubbles, which enable gas transport through the bed