16,452 research outputs found

    Consultation skills in veterinary practice: exploring the links between consultation skills and key performance indicators.

    Get PDF
    This project was part of a larger research project aimed at researching and supporting the development of a new postgraduate qualification in general veterinary practice. It arose in the beginning from the establishment of an MSc group of 8 experienced veterinary general practitioners in 2001, who researched various aspects of the question ‘what are the postgraduate educational needs of the GP vet in the UK?’ After completing the original work, 5 of the group continued their research into their Doctorates, and this project was the one in the subject of consultation skills. The subject was very largely unexplored in the veterinary world, but extensive research had been done in the medical field. There were the challenges of formulating methods of collecting primary data in the veterinary field, and looking at the medical field to see if the methodologies were transferable. The choice of methodologies was strongly influenced by fear factors, in which the researcher had to make choices based on what methods of data collection the veterinary practitioners accepted. Research instruments were found and developed to explore aspects of the consultation. Key performance indicators were explored firstly separately, and then the research explored possible links between consultation skills and KPI’s. Significant links were found, which lead to a greater understanding of the importance of consultation skills and how they might be analysed in ways that had potential for veterinary surgeons to see ways of identifying their skills and improving them. The results were of high impact value

    Statistical energy methods Final report, 18 May 1969 - 18 May 1970

    Get PDF
    Statistical energy analysis for studying dynamic behavior of large, complex structures and acoustic space

    Precise atmospheric oxygen measurements with a paramagnetic oxygen analyzer

    Get PDF
    A methodology has been developed for making continuous, high-precision measurements of atmospheric oxygen concentrations by modifying a commercially available paramagnetic oxygen analyzer. Incorporating several design improvements, an effective precision of 0.2 ppm O-2 from repeated measurements over a 1-hour interval was achieved. This is sufficient to detect background changes in atmospheric O-2 to a level that constrains various aspects of the global carbon cycle. The analyzer was used to measure atmospheric O-2 in a semicontinuous fashion from air sampled from the end of Scripps Pier, La Jolla, California, and data from a 1-week period in August 1996 are shown. The data exhibit strongly anticorrelated changes in O-2 and CO2 caused by local or regional combustion of fossil fuels. During periods of steady background CO2 concentrations, however, we see additional variability in O-2 concentrations, clearly not due to local combustion and presumably due to oceanic sources or sinks of O-2. This variability suggests that in contrast to CO2, higher O-2 sampling rates, such as those provided by continuous measurement programs, may be necessary to define an atmospheric O-2 background and thus aid in validating and interpreting other O-2 data from flask sampling programs. Our results have also demonstrated that this paramagnetic analyzer and gas handling design is well suited for making continuous measurements of atmospheric O-2 and is suitable for placement at remote background air monitoring sites

    SPATIAL YIELD RISK ISSUES: COMPARING YIELD RISK ACROSS REGION, CROP AND AGGREGATION METHOD

    Get PDF
    Crop yield risk analysis is difficult since historic field level yields are often not available. Spatially aggregated yield data are available, however, but aggregation distortion for farm level analysis may exist. This paper addresses how much aggregation distortion to expect and offers some adjustment solutions across crops and production regions.Risk and Uncertainty,

    Passive CO<sub>2</sub> removal in urban soils:evidence from brownfield sites

    Get PDF
    Management of urban brownfield land can contribute to significant removal of atmospheric CO2 through the development of soil carbonate minerals. However, the potential magnitude and stability of this carbon sink is poorly quantified as previous studies address a limited range of conditions and short durations. Furthermore, the suitability of carbonate-sequestering soils for construction has not been investigated. To address these issues we measured total inorganic carbon, permeability and ground strength in the top 20 cm of soil at 20 brownfield sites in northern England, between 2015 and 2017. Across all sites accumulation occurred at a rate of 1–16 t C ha−1 yr−1, as calcite (CaCO3), corresponding to removal of approximately 4–59 t CO2 ha−1 yr−1, with the highest rate in the first 15 years after demolition. C and O stable isotope analysis of calcite confirms the atmospheric origin of the measured inorganic carbon. Statistical modelling found that pH and the content of fine materials (combined silt and clay content) were the best predictors of the total inorganic carbon content of the samples. Measurement of permeability shows that sites with carbonated soils possess a similar risk of run-off or flooding to sandy soils. Soil strength, measured as in-situ bearing capacity, increased with carbonation. These results demonstrate that the management of urban brownfield land to retain fine material derived from concrete crushing on site following demolition will promote calcite precipitation in soils, and so offers an additional CO2 removal mechanism, with no detrimental effect on drainage and possible improvements in strength. Given the large area of brownfield land that is available for development, the contribution of this process to CO2 removal by urban soils needs to be recognised in CO2 mitigation policies

    Rural children are more likely to live in cohabiting-couple households

    Get PDF
    As cohabiting increases nationwide, new data show that the growing rate of children in these households is most pronounced in rural areas. This brief analyzes recent U.S. Census Bureau data to explore these trends and patterns

    Nitrification amplifies the decreasing trends of atmospheric oxygen and implies a larger land carbon uptake

    Get PDF
    [1] Atmospheric O-2 trend measurements are used to partition global oceanic and land biotic carbon sinks on a multiannual basis. The underlying principle is that a terrestrial uptake or release of CO<sub>2</sub> is accompanied by an opposite flux of O-2. The molar ratio of the CO<sub>2</sub> and O-2 terrestrial fluxes should be 1, if no other elements are considered. However, reactive nitrogen produced by human activities (e.g., fertilizers, N deposition) is also being incorporated into plant tissues. The various reaction pathways of the terrestrial nitrogen cycle cause fluxes of atmospheric O-2. Thus the cycles of nitrogen, carbon, and oxygen must be linked together. We report here on previously unconsidered anthropogenic nitrogen-related mechanisms which impact atmospheric O-2 trends and thus the derived global carbon sinks. In particular, we speculate that anthropogenic-driven changes are driving the global nitrogen cycle to a more oxidized state, primarily through nitrification, nitrate fertilizer industrial production, and combustion of fossil fuels and anthropogenic biomass burning. The sum of these nitrogen-related processes acts to additionally decrease atmospheric O-2 and slightly increase atmospheric CO<sub>2</sub>. We have calculated that the effective land biotic O-2: CO<sub>2</sub> molar ratio ranges between 0.76 and 1.04 rather than 1.10 ( moles of O-2 produced per mole of CO<sub>2</sub> consumed) over the period 1993 - 2003, depending on which of four contrasting nitrogen oxidation and reduction pathway scenarios is used. Using the scenario in which we have most confidence, this implies a 0.23 PgC yr(-1) correction to the global land biotic and oceanic carbon sinks of most recently reported estimates over 1993 - 2003, with the land biotic sink becoming larger and the oceanic sink smaller. We have attributed large uncertainties of 100% to all nitrogen-related O-2 and CO<sub>2</sub> fluxes and this corresponds up to +/- 0.09 PgC yr(-1) increase in global carbon sink uncertainties. Thus accounting for anthropogenic nitrogen-related terrestrial fluxes of O-2 results in a 45% larger land biotic sink of 0.74 +/- 0.78 PgC yr(-1) and a slightly smaller oceanic sink of 2.01 +/- 0.66 PgC yr(-1) for the decade 1993 - 2003. [References: 38

    Carbon deposition in the Bosch process with ruthenium and ruthenium-iron alloy catalysts

    Get PDF
    The effectiveness of ruthenium and the alloys 50Ru50Fe and 33Ru67Fe as alternatives to iron, nickel, and cobalt catalysts in recovering oxygen from metabolic carbon dioxide was investigated. Carbon deposition boundaries over the unsupported alloys are reported. Experiments were also carried out over 50Ru50Fe and 97Ru3Fe3 catalysts supported on gamma-alumina to determine their performance in the synthesis of low molecular weight olefins. High production of ethylene and propylene would be beneficial for an improvement of an overall Bosch process, as a gas phase containing high olefin content would enhance carbon deposition in a Bosch reactor

    Noise reduction evaluation of grids in a supersonic air stream with application to Space Shuttle

    Get PDF
    Near field acoustic measurements were obtained for a model supersonic air jet perturbed by a screen. Noise reduction potential in the vicinity of the space shuttle vehicle during ground launch when the rocket exhaust flow is perturbed by a grid was determined. Both 10 and 12 mesh screens were utilized for this experiment, and each exhibited a noise reduction only at very low frequencies in the near field forward arc. A power spectrum analysis revealed that a modest reduction of from 3 to 5 decibels exists below a Strouhal number S sub t = 0.11. Above S sub t = 0.11 screen harmonics increased the observed sound pressure level. The favorable noise reductions obtained with screens for S sub t 0.11 may be of substantial interest for the space shuttle at ground launch
    • …
    corecore