Hydraulic conditioning to manage potable water discolouration

Results are reported from studies conducted using a unique laboratory-based, full-scale, temperature-controlled pipe facility to examine the impact of conditioning shear stress on discolouration risk, as characterised by bulk water samples (turbidity, iron and manganese) and biofilm pipe wall measurements. The facility uniquely allowed for replication of the dynamics of an operational network but with rigorous control, thus yielding fully representative results overcoming the limitations of bench-scale or operational studies. The effect of the daily variation in flow (and boundary shear stress) was observed to be greater than the effect of the average daily flow rate at reducing discolouration risk. This is useful for informing operation and maintenance strategies, specifically that regularly imposing cycles of flow variation are more effective than increasing total average flow rates at limiting discolouration risk. The application of such knowledge aids the development of cost-effective, proactive, operational interventions to manage discolouration

Proteomics with a pinch of salt: A cyanobacterial perspective

Cyanobacteria are ancient life forms and have adapted to a variety of extreme environments, including high salinity. Biochemical, physiological and genetic studies have contributed to uncovering their underlying survival mechanisms, and as recent studies demonstrate, proteomics has the potential to increase our overall understanding further. To date, most salt-related cyanobacterial proteomic studies have utilised gel electrophoresis with the model organism Synechocystis sp. PCC6803. Moreover, focus has been on 2–4% w/v NaCl concentrations within different cellular compartments. Under these conditions, Synechocystis sp. PCC6803 was found to respond and adapt to salt stress through synthesis of general and specific stress proteins, altering the protein composition of extracellular layers, and re-directing control of complex central intermediary pathways. Post-transcriptional control was also predicted through non-correlating transcript level data and identification of protein isoforms

Rumor mongering: scapegoating techniques for social cohesion and coping among the Japanese-Americans in United States internment camps during World War II

This thesis examines the linkages between the verbal response to social stress, the ostracism of individuals from a social group, and the subsequent increased cohesion of the remaining members. To write the thesis, I utilized these printed references in the forms of scholarly research, journals, diaries, and interviews primarily from the Texas A&M Sterling Evans Library and the online journal resource JSTOR as well as a video documentary. Previous research into the genres of rumor, identity, and scapegoat accusations are explicated. Then, these approaches are applied to the rumors told by the Japanese-Americans who were removed from their homes and sent to internment camps in the United States during World War II. The internment camps were rife with scapegoat accusations between the internees whose once unified culture group was fissured along lines of loyalty to the United States or to Japan. These scapegoat accusations against fellow internees were an outlet for the stress exerted upon them by the American government that was not directly combatable. Even processes as complicated as changing social dynamics can be observed through the mechanisms of rumors and scapegoat accusations

Comparative quantitative proteomics of prochlorococcus ecotypes to a decrease in environmental phosphate concentrations

BACKGROUND: The well-lit surface waters of oligotrophic gyres significantly contribute to global primary production. Marine cyanobacteria of the genus Prochlorococcus are a major fraction of photosynthetic organisms within these areas. Labile phosphate is considered a limiting nutrient in some oligotrophic regions such as the Caribbean Sea, and as such it is crucial to understand the physiological response of primary producers such as Prochlorococcus to fluctuations in the availability of this critical nutrient. RESULTS: Prochlorococcus strains representing both high light (HL) (MIT9312) and low light (LL) (NATL2A and SS120) ecotypes were grown identically in phosphate depleted media (10 μM Pi). The three strains displayed marked differences in cellular protein expression, as determined by high throughput large scale quantitative proteomic analysis. The only strain to demonstrate a significantly different growth rate under reduced phosphate conditions was MIT9312. Additionally, there was a significant increase in phosphate-related proteins such as PhoE (> 15 fold increase) and a depression of the Rubisco protein RbcL abundance in this strain, whereas there appeared to be no significant change within the LL strain SS120. CONCLUSIONS: This differential response between ecotypes highlights the relative importance of phosphate availability to each strain and from these results we draw the conclusion that the expression of phosphate acquisition mechanisms are activated at strain specific phosphate concentrations

Enumeration of sulphate-reducing bacteria for assessing potential for hydrogen sulphide production in urban drainage systems

Urban drainage structures have increasing demands which can lead to increasing hydrogen sulphide related problems forming in places where they have not previously been prevalent. This puts pressure on the methods currently used to monitor and diagnose these problems and more sophisticated methods may be needed for identifying the origin of the problems. Molecular microbiological techniques, such as quantitative polymerase chain reaction, offer a potential alternative for identifying and quantifying bacteria likely to be causing the production of hydrogen sulphide, information that when combined with an appropriate sampling programme, can then be used to identify the potentially most effective remediation technique. The application of these methods in urban drainage systems is however, not always simple, but good results can be achieved. In this study hydrogen sulphide producing bacteria were quantified in three small combined sewer overflow storage tanks. Bacterial counts were compared between wastewater, biofilms and sediments. Similar numbers were found in the wastewater and biofilms, with the numbers in the sediments being lower. If remediation methods for hydrogen sulphide is deemed necessary in the tanks, methods that target both the wastewater and the biofilms should therefore be considered

Appropriate design and reporting of superiority, equivalence and non-inferiority clinical trials incorporating a benefit risk assessment: the BRAINS study including expert workshop

Background Randomised controlled trials are designed to assess the superiority, equivalence or non-inferiority of a new health technology, but which trial design should be used is not always obvious in practice. In particular, when using equivalence or non-inferiority designs, multiple outcomes of interest may be important for the success of a trial, despite the fact that usually only a single primary outcome is used to design the trial. Benefit–risk methods are used in the regulatory clinical trial setting to assess multiple outcomes and consider the trade-off of the benefits against the risks, but are not regularly implemented in publicly funded trials. Objectives The aim of the project is to aid the design of clinical trials with multiple outcomes of interest by defining when each trial design is appropriate to use and identifying when to use benefit–risk methods to assess outcome trade-offs (qualitatively or quantitatively) in a publicly funded trial setting. Methods A range of methods was used to elicit expert opinion to answer the project objectives, including a web-based survey of relevant researchers, a rapid review of current literature and a 2-day consensus workshop of experts (in 2019). Results We created a list of 19 factors to aid researchers in selecting the most appropriate trial design, containing the following overarching sections: population, intervention, comparator, outcomes, feasibility and perspectives. Six key reasons that indicate a benefit–risk method should be considered within a trial were identified: (1) when the success of the trial depends on more than one outcome; (2) when important outcomes within the trial are in competing directions (i.e. a health technology is better for one outcome, but worse for another); (3) to allow patient preferences to be included and directly influence trial results; (4) to provide transparency on subjective recommendations from a trial; (5) to provide consistency in the approach to presenting results from a trial; and (6) to synthesise multiple outcomes into a single metric. Further information was provided to support the use of benefit–risk methods in appropriate circumstances, including the following: methods identified from the review were collated into different groupings and described to aid the selection of a method; potential implementation of methods throughout the trial process were provided and discussed (with examples); and general considerations were described for those using benefit–risk methods. Finally, a checklist of five pieces of information that should be present when reporting benefit–risk methods was defined, with two additional items specifically for reporting the results. Conclusions These recommendations will assist research teams in selecting which trial design to use and deciding whether or not a benefit–risk method could be included to ensure research questions are answered appropriately. Additional information is provided to support consistent use and clear reporting of benefit–risk methods in the future. The recommendations can also be used by funding committees to confirm that appropriate considerations of the trial design have been made. Limitations This research was limited in scope and should be considered in conjunction with other trial design methodologies to assess appropriateness. In addition, further research is needed to provide concrete information about which benefit–risk methods are best to use in publicly funded trials, along with recommendations that are specific to each method

Appropriate design and reporting of superiority, equivalence and non-inferiority clinical trials incorporating a benefit risk assessment: the BRAINS study including expert workshop

Background Randomised controlled trials are designed to assess the superiority, equivalence or non-inferiority of a new health technology, but which trial design should be used is not always obvious in practice. In particular, when using equivalence or non-inferiority designs, multiple outcomes of interest may be important for the success of a trial, despite the fact that usually only a single primary outcome is used to design the trial. Benefit–risk methods are used in the regulatory clinical trial setting to assess multiple outcomes and consider the trade-off of the benefits against the risks, but are not regularly implemented in publicly funded trials. Objectives The aim of the project is to aid the design of clinical trials with multiple outcomes of interest by defining when each trial design is appropriate to use and identifying when to use benefit–risk methods to assess outcome trade-offs (qualitatively or quantitatively) in a publicly funded trial setting. Methods A range of methods was used to elicit expert opinion to answer the project objectives, including a web-based survey of relevant researchers, a rapid review of current literature and a 2-day consensus workshop of experts (in 2019). Results We created a list of 19 factors to aid researchers in selecting the most appropriate trial design, containing the following overarching sections: population, intervention, comparator, outcomes, feasibility and perspectives. Six key reasons that indicate a benefit–risk method should be considered within a trial were identified: (1) when the success of the trial depends on more than one outcome; (2) when important outcomes within the trial are in competing directions (i.e. a health technology is better for one outcome, but worse for another); (3) to allow patient preferences to be included and directly influence trial results; (4) to provide transparency on subjective recommendations from a trial; (5) to provide consistency in the approach to presenting results from a trial; and (6) to synthesise multiple outcomes into a single metric. Further information was provided to support the use of benefit–risk methods in appropriate circumstances, including the following: methods identified from the review were collated into different groupings and described to aid the selection of a method; potential implementation of methods throughout the trial process were provided and discussed (with examples); and general considerations were described for those using benefit–risk methods. Finally, a checklist of five pieces of information that should be present when reporting benefit–risk methods was defined, with two additional items specifically for reporting the results. Conclusions These recommendations will assist research teams in selecting which trial design to use and deciding whether or not a benefit–risk method could be included to ensure research questions are answered appropriately. Additional information is provided to support consistent use and clear reporting of benefit–risk methods in the future. The recommendations can also be used by funding committees to confirm that appropriate considerations of the trial design have been made. Limitations This research was limited in scope and should be considered in conjunction with other trial design methodologies to assess appropriateness. In addition, further research is needed to provide concrete information about which benefit–risk methods are best to use in publicly funded trials, along with recommendations that are specific to each method. Study registration The rapid review is registered as PROSPERO CRD42019144882. Funding Funded by the Medical Research Council UK and the National Institute for Health and Care Research as part of the Medical Research Council–National Institute for Health and Care Research Methodology Research programme

Alien knowledge: Preparing student midwives for learning about infant feeding-Education practice at a UK university

Infant feeding education forms a key element in undergraduate midwifery education in the UK. Students must be prepared to provide women with support and information to make appropriate health choices for themselves and their infants. However, student midwives may already have developed opinions about infant feeding prior to commencing a midwifery education programme. The education literature suggests that existing attitudes may present a barrier to learning for some students. This particularly applies to learning in relation to sensitive or emotionally laden subjects. A review of the literature was undertaken to identify potential teaching approaches which might help students to overcome barriers to learning. Following this the evidence was utilised at a UK university to develop activities which prepare student midwives for effective learning around infant feeding. Students enrolled in the midwifery education programme were introduced to a number of activities aimed at encouraging them to accommodate unfamiliar ideas or 'alien knowledge'. These included placing students in situations which challenged their ideas, as well as engaging in group discussions and reflective exercises. The impact of these educational interventions was identified through formative and summative assessment, and through evaluation of the teaching strategy at the end of the programme. This demonstrated that, amongst those students with previously negative attitudes towards infant feeding, there was a move towards more positive attitudes and a greater confidence in providing evidence based information to parents

Generating a predictive model for injury rates for a chemical manufacturing company

Workplace safety is not a new field of study, but the application of data analytics as a predictive tool is relatively new to the area. Beyond the obvious harm caused to workers, fatal and nonfatal injuries accrue a significant financial burden nationwide. Previous safety measures have focused largely on reactive tools. While these have done a significant job reducing nonfatal workplace injuries, they have done little to assuage fatal ones. Predictive analysis may be the next step in reducing workplace injury. By mining and processing safety-related data, predictive analysis can inform employers of high risk situations before they happen. By taking this preventative approach, employers have the chance to stop workplace incidents before their employees suffer harm. While these analyses have generally used national-level data sources and shown great success at reducing injury in some industries, such as construction, there has been little work done either in the manufacturing sector or at the company level. Using company-level data collected from a chemical manufacturing company, this team will create a predictive model for workplace incidents. Data collected from the 2017 and 2018 years will be used to train and validate a prediction model. That model will then be tested in 2019 data to determine its predictive efficiency

Understanding the costs of investigating coliform and E. coli detections during routine drinking water quality monitoring

Bacteriological failure investigations are crucial in the provision of safe, clean drinking water as part of a process of quality assurance and continual improvement. However, the financial implications of investigating coliform and Escherichia coli failures during routine water quality monitoring are poorly understood in the industry. The investigations for 737 coliform and E. coli failures across five UK water companies were analysed in this paper. The principal components of investigation costs were staff hours worked, re-samples collected, transportation, and special investigatory activities related to the sample collection location. The average investigation costs ranged from £575 for a customer tap failure to £4,775 for a water treatment works finished water failure. These costs were compared to predictions for US utilities under the Revised Total Coliform Rule. Improved understanding of the financial and staffing implications of investigating bacteriological failures can be used to budget operational expenditures and justify increased funding for preventive strategies