130 research outputs found

    Thermal behaviour of blind-bolted connections to hollow and concrete-filled steel tubular columns

    Get PDF
    This paper reports on the thermal analysis of blind-bolts connected to concrete filled steel tube (CFST) and hollow steel section (HSS) columns. The aim is therefore the investigation of the temperature distribution in the connected sections and the evaluation of the effects due to concrete filling and anchored bolt extension. For this purpose, experimental and numerical work was carried out. The test programme involved twelve small- scale unloaded specimens where the variables were: tube section dimensions, type of blind-bolt, and hollow or concrete filled steel tubes. Results from the experiments revealed the noteworthy effect of concrete on bolt temperature reduction, the insignificant influence of tube section dimensions, and the limited impact of embedded bolt extension. Finite element models (FEM) of connections were developed to simulate the behaviour of tested pieces. Comparison with tests allowed the calibration of thermal material properties and characteristics of heat flux in interactions. Furthermore, assessments of heat transfer problem on the simulation of small-scale pieces extended to the numerical model of the whole endplate connection between an I-beam and a tubular column. Finally, the suitability of simple methods from Eurocode 3 Part 1.2 and other references to obtain the temperature on the connection was evaluated

    Environmental impacts of food retail: A framework method and case application

    Get PDF
    Š 2015 Elsevier Ltd. The food retail sector is the gatekeeper between consumers and producers and has substantial influence on consumption and production choices via procurement and provision decisions. Food provision and consumption systems embody huge environmental impacts worldwide. Food retailers as gatekeepers have a key role to play to enable sustainable consumption and provision to become common practice. In this paper, a framework to attribute emissions and water use to individual and all food retail businesses and their products by geographical area and postcode of cities is presented. As far as the current authors are aware, such a framework has not been generated for food retail sector businesses before, primarily due to barriers to input-output modelling of the sector. The scientific value added is that a novel approach to overcome barriers is presented as well as the required framework. The framework is illustrated for Southampton, but can be applied in other regions of the world where similar data exist. The value of a business's product emissions estimates (generated by the framework) is they can be a first step in informing product prioritisation for focussing information searches or more detailed life cycle analysis to make sustainable procurement and choice editing decisions. The approach has value to government, businesses and non-government organisations (NGOs) in developing strategy and planning sustainable provision and procurement; by helping benchmark sustainable shopping provision, prioritisation of retail businesses and product categories for sustainable procurement/choice editing

    A critical realist evaluation of advance care planning in care homes

    Get PDF
    Aims: To evaluate care planning in advance of end-of-life care in care homes. Design: A qualitative study. Methods: Qualitative data were collected from January 2018–July 2019 (using focus groups and semi-structured interviews) from three care homes in the South West of England. The data were analysed using thematic analysis followed by Critical Realist Evaluation. Results: Participants comprised of registered nurses (N = 4), care assistants (N = 8), bereaved relatives (N = 7), and domiciliary staff (N = 3). Although the importance of advance care planning was well recognized, the emotional labour of frequently engaging in discussions about death and dying was highlighted as a problem by some care home staff. It was evident that in some cases care home staff's unmet emotional needs led them to rushing and avoiding discussions about death and dying with residents and relatives. A sparsity of mechanisms to support care home staff's emotional needs was noted across all three care homes. Furthermore, a lack of training and knowledge appeared to inhibit care home staff's ability to engage in meaningful care planning conversations with specific groups of residents such as those living with dementia. The lack of training was principally evident amongst non-registered care home staff and those with non-formal caring roles such as housekeeping. Conclusion: There is a need for more focused education to support registered and non-registered care home staff to effectively engage in sensitive discussions about death and dying with residents. Furthermore, greater emotional support is necessary to help build workforce resilience and sustain change. Impact: Knowledge generated from this study can be used to inform the design and development of future advance care planning interventions capable of supporting the delivery of high-quality end-of-life care in care homes

    A critical realist evaluation of advance care planning in care homes

    Get PDF
    Aims: To evaluate care planning in advance of end-of-life care in care homes. Design: A qualitative study. Methods: Qualitative data were collected from January 2018–July 2019 (using focus groups and semi-structured interviews) from three care homes in the South West of England. The data were analysed using thematic analysis followed by Critical Realist Evaluation. Results: Participants comprised of registered nurses (N = 4), care assistants (N = 8), bereaved relatives (N = 7), and domiciliary staff (N = 3). Although the importance of advance care planning was well recognized, the emotional labour of frequently engaging in discussions about death and dying was highlighted as a problem by some care home staff. It was evident that in some cases care home staff's unmet emotional needs led them to rushing and avoiding discussions about death and dying with residents and relatives. A sparsity of mechanisms to support care home staff's emotional needs was noted across all three care homes. Furthermore, a lack of training and knowledge appeared to inhibit care home staff's ability to engage in meaningful care planning conversations with specific groups of residents such as those living with dementia. The lack of training was principally evident amongst non-registered care home staff and those with non-formal caring roles such as housekeeping. Conclusion: There is a need for more focused education to support registered and non-registered care home staff to effectively engage in sensitive discussions about death and dying with residents. Furthermore, greater emotional support is necessary to help build workforce resilience and sustain change. Impact: Knowledge generated from this study can be used to inform the design and development of future advance care planning interventions capable of supporting the delivery of high-quality end-of-life care in care homes

    The changing global distribution and prevalence of canine transmissible venereal tumour.

    Get PDF
    BACKGROUND: The canine transmissible venereal tumour (CTVT) is a contagious cancer that is naturally transmitted between dogs by the allogeneic transfer of living cancer cells during coitus. CTVT first arose several thousand years ago and has been reported in dog populations worldwide; however, its precise distribution patterns and prevalence remain unclear. RESULTS: We analysed historical literature and obtained CTVT prevalence information from 645 veterinarians and animal health workers in 109 countries in order to estimate CTVT's former and current global distribution and prevalence. This analysis confirmed that CTVT is endemic in at least 90 countries worldwide across all inhabited continents. CTVT is estimated to be present at a prevalence of one percent or more in dogs in at least 13 countries in South and Central America as well as in at least 11 countries in Africa and 8 countries in Asia. In the United States and Australia, CTVT was reported to be endemic only in remote indigenous communities. Comparison of current and historical reports of CTVT indicated that its prevalence has declined in Northern Europe, possibly due to changes in dog control laws during the nineteenth and twentieth centuries. Analysis of factors influencing CTVT prevalence showed that presence of free-roaming dogs was associated with increased CTVT prevalence, while dog spaying and neutering were associated with reduced CTVT prevalence. Our analysis indicated no gender bias for CTVT and we found no evidence that animals with CTVT frequently harbour concurrent infectious diseases. Vincristine was widely reported to be the most effective therapy for CTVT. CONCLUSIONS: Our results provide a survey of the current global distribution of CTVT, confirming that CTVT is endemic in at least 90 countries worldwide. Additionally, our analysis highlights factors that continue to modify CTVT's prevalence around the world and implicates free-roaming dogs as a reservoir for the disease. Our analysis also documents the disappearance of the disease from the United Kingdom during the twentieth century, which appears to have been an unintentional result of the introduction of dog control policies.This is the author's accepted manuscript. The final version of this article has been published by BioMed Central: http://www.biomedcentral.com/1746-6148/10/168
    • …
    corecore