6 research outputs found
Recommended from our members
Near-surface dispersion of CO2 seepage from geologic storage sites: Interplay of process and detection strategy
Injection of CO2 into deep geological formations entails the possibility of CO2 leakage from the storage formation through wellbores, faults, and fractures. CO2 leakage may ultimately reach the near-surface environment by buoyancy and pressure driving forces where it will either flow rapidly into the atmosphere as from an open well, or be emitted over a wide area as seepage. We are investigating the processes, detection, and environmental impacts of CO2 migration in the near-surface environment. Prior simulation work has revealed fundamental behaviors for the case of small CO2 flux including (1) the tendency to fill up the vadose zone with CO2 at concentrations approaching 100%, and (2) rapid mixing of CO2 seepage as it enters the atmosphere from flat and horizontal ground surfaces provided there is wind. The effects of high CO2 flux, weak wind, topographic depressions, and back-filled trenches are being investigated. We are using a variety of approaches from scale analysis to numerical simulation to analyze near-surface migration and dispersion of dense CO2 by wind and gravity-driven flow. Test problems with a range of CO2 seepage fluxes, topography, and wind conditions on length scales of order 100 meters are being considered. Topographic depressions and back-filled trenches are capable of diminishing mixing insofar as they can be sinks for CO2 seepage and isolated from the dispersive effects of wind. As such, these features may be good places for instrumentation to detect CO2 seepage. In addition to investigating the interplay between dispersion and detection, our work contributes to the prediction of environmental impacts in the near-surface environment
Developing a partnership model, across five universities in the north of England, as part of a centre for excellence in teaching and learning
Five universities in Yorkshire, England have developed a collaborative partnership model based on the assessment and learnng in practice settings of nursing and other health professional students. Objectives: > to explore an innovative model of partnership > to share a multi professional approach to assessment and learning in practice > to examine the implications for nursing The partnership is unique in that it focusses initially on 3 areas of generic competence, communication, team working and ethics. The structure of the collaboration is differentiated by the framework in place which facilitates the equal contribution from each member. The programme involves 16 health and social care professions using a multi professional approach to ensuring that students are fully equipped to perform competantly and confidently at the start of their professional careers. The paper explores the implications of student supervision and assessment in practice and how this approach can both better utilise resources and enhance the validity and reliability of the assessment of practice. The session will encourage interaction between participants by exploring how we go about implementing meaningful and sustainable changes in assessment in practice settings. Focussing on the opportunities, threats and challenges posed by inter-professional assessment. Also explored will be questions such as, can and should a sutably qualified physiotherapist assess pre- registration student nurses? What preparation should a nurse have to assess a social worke