The change of a vehicle’s velocity due to an impact, DeltaV (v) is often calculated and used in the scientific investigation of road traffic collisions. Two types of model are in common use to achieve this purpose, those based on the conservation of linear and angular momentum and the CRASH model which also considers the conservation of energy. It is shown that CRASH and major implementations of the momentum models are equivalent provided certain conditions are satisfied. Explicit conversions between the main variants of the models are presented. A method is also presented which describes a new formula for determining the total work performed in causing crush to a particular vehicle. This has the advantage of incorporating restitution effects and yields identical results to the momentum only models. Although the CRASH model has received adverse criticism due to perceived inaccuracies in the results, little work has been performed to determine the theoretical limitations on accuracy. This thesis rectifies that shortcoming. A Monte Carlo simulation and analytical model are developed here to provide two independent methods for determining the overall accuracy of the CRASH method. The principal direction of force was found to be the most likely to introduce error based on the CRASH assessment. It is shown how this and other sources of error in the CRASH model can be quantified for a particular collision suggesting priorities for minimising the overall uncertainty. The data from a series of well known crash tests are used with each of the models to provide comparison and validation data. It is recognised that without additional data velocity change is of limited use for forensic investigation. However DeltaV can be used as a proxy for acceleration and is particularly useful in studies involving injury causation. A method is also presented here which uses the change in velocity sustained by a vehicle in a planar collision to estimate the velocities of a vehicle before and after a collision. This method relies solely on conservation laws and is also applicable to situations where the coefficient of restitution is non-zero. An extension to the method is also described which allows an initial estimate to be modified to generate more realistic directions of force. This extension has the desirable effect of reducing uncertainty in the estimation of the direction of force which significantly improves the overall accuracy.

This thesis investigates the experiences of generalist primary teachers, in Scotland, as they instigated curriculum and pedagogical change in physical education. Five primary teachers with an additional qualification in physical education, the Postgraduate Certificate in 3-14 physical education (PGCert), were followed within their school contexts over an academic year. In contrast to much of the preceding literature this research provides empirical work at the micro level on educational change from the perspective of the individual teacher: illuminating the reciprocal relationship between professional learning and educational change. A qualitative, interpretivist approach underpinned the gathering and analysis of data. This approach reflected the focus of the study which was to understand and make sense of the multiple realities, experiences and views of participant teachers evolving from their social, cultural and historical contexts. Data were gathered using semi-structured interviews, unstructured interviews about teachers’ planning and observations of physical education lessons. The theoretical framework that was used to interrogate the data incorporated situated learning theory (Lave and Wenger, 1991), professional learning and educational change literature; in particular the work of Fullan was utilised to explore his concept of ‘change agentry’. The first line of analysis establishes how the participant teachers approached teaching and learning in physical education prior to engaging with the PGCert. Thereafter the PGCert is examined to ascertain how the format and structure of this professional development opportunity came to influence the participant teachers. In the final analysis, an over-view of each teacher’s narrative in regards to their role in the change process is presented, outlining the curricular and pedagogical changes they initiated within their school contexts. Taken together, these findings contribute to research on educational change providing detailed analysis over an extended period of time of the motivating factors, constraints and complex character of change from the perspective of teachers within their individual school contexts. In the present educational climate where teachers are expected to be leaders of curricular and pedagogical change this study provides empirical evidence of teachers exercising their autonomy and integrating professional learning within their practice as they initiate and implement change.

"Think-Assess-Design" is a model for guiding traditional organizations through the steps necessary to redesign themselves into a more empowered, team-based work environment. Three broad steps—think, assess, and design—provided the framework for organizational change in this case study.

This study attempts to investigate one of the most cited reasons for the failure of organisational change efforts: individual resistance to change. It also seeks to determine what personal manifestations need to exist in order for an organisation to adequately establish the extent to which a proposed change effort will yield a successful outcome. This was evaluated through the job constructs of communication, job-insecurity, participation, procedural justice and trust. The research also Management and Change Agent roles within the change process to determine whether this had an impact on the individual change experience at a cognitive and behavioural level. In a South African Motor Manufacturing company data was obtained from 306 respondents. The findings clearly indicate that a positive experience of the job constructs is likely to result in positive individual change which will result in a successful implementation and sustainability of the change initiative.

M.Com. (Economics) / Please refer to full text to view abstract

The importance of enhancing internal communication and its content during organisational change appears to be neglected by many organisations. Although change management literature agrees generally about the role that communication plays in facilitating change, there is still a dearth of empirical studies that focus on improving internal communication during organisational change phases. The evolution of communication technology has provided some new tools that can enhance internal communication within an organisation. This study explores the role of using of one of these new communication technologies in communicating organisational change through the development of a novel conceptual model. The developed model covers the communication needs in each phase of a planned change, and combines the benefits of communicating organisational change with the benefits of using Enterprise Social Networks (ESN), as found in the literature. The aim is to investigate empirically how ESN as a new internal communication technology can be employed to communicate organisational change effectively in order to facilitate that change. To do so, the researcher in this study has applied a qualitative approach through a case study strategy in order to validate the conceptual model being proposed. The researcher conducted 32 interviews and analysed all of them qualitatively using Nvivo software. The findings of the conducted study revealed that using ESN had many positive impacts on employees, such as increasing their awareness, engagement and participation, which helped to facilitate the overall change projects. Moreover, the study proved the suitability of the validated novel model to contribute in facilitating organisational change through ESN, which can guide leaders, managers, change agents and academics on how ESN can be used to communicate planned change effectively in order to facilitate it.

Achieving the Scottish Government's carbon reduction targets requires not only the decarbonisation of industry and electricity generation, which is now largely underway, but also significant changes in the actions and decisions of millions of individuals, whose carbon emissions fall outside the areas which Government can control. Transport, much of it undertaken by individuals, accounts for around 20% of Scotland's carbon emissions. Policy aimed at changing individual travel behaviours will therefore become increasingly important. Commonly applied behaviour change strategies based on rational actor theory face conceptual problems and cannot overcome the lack of agency experienced by individuals buffeted by a range of influences in a complex world. Practice theory relocates the site of analysis from the individual to the social and helps to overcome these problems, but it is not clear how to deliberately change practices to achieve the carbon reductions required. Understanding practices as emergent properties of complex social systems suggests that working to alter the complex social system may lead to different emergent properties, i.e. more sustainable practices. My research explored this approach by conducting an experiment in Aberdeen that sought to influence the complex social system within which audiences travel to a large theatre in the city. Emergent properties of the system encouraged travel by private car: problems of (in)convenience and insecurity were shaping individuals' travel practices. Collaboration between actors powerful enough to affect the system - a transport provider, a local authority and the theatre itself - was needed to influence it sufficiently to bring about a change in the main travel mode from private cars to public transport. Analysis of this case identifies the need to acknowledge the relevance of complexity theory when developing carbon reduction policy. Perverse incentives encouraging public organisations to focus on their own 'direct' carbon emissions need to be replaced with a duty to collaborate with others to reduce society's overall carbon emissions. Those making policy and those implementing it will therefore need to understand and apply complexity theory, and will need highly developed skills in managing long-term collaborative projects rather than 'delivering' one-off changes. These attributes may be found in practitioners from diverse and less obvious fields, including the cultural sector.

This study examines organisational change within the Gauteng Department of Infrastructure Development (DID) “the Department”, focusing on the strategies that should have been implemented in order to reduce the resistance to change and minimise the negative impact change brought to the employees. The study also focuses on employee satisfaction and the impact of change on the psychological contracts from a broad perspective of employees within the organisation.

Climate change is one of the greatest threats to marine environments globally. Fisheries are being increasingly affected, with impacts not only to fish stocks but also the fishers who rely on marine resources for their livelihoods. This thesis uses an interdisciplinary, mixed methods approach to examine climate change impacts on fisheries within the under-studied, yet rapidly warming, south-west region of the UK. The thesis begins with a comprehensive review of the literature regarding climate change impacts on UK fisheries, the vulnerability of these fishery systems to future climate change and how climate change is perceived among fishers. In Chapter 2 a methodology is developed to standardise abundance data across multiple scientific fisheries survey datasets in order to facilitate future projections to be generated for the south-west UK region. Chapter 3 presents future projections of abundances and distributions for eight key commercial fish species under future warming scenarios until the end of the century. Results suggest that increasing temperatures and limitations of bathymetry are key drivers of species responses. Certain cold-water species including Atlantic cod (Gadus morhua L.) and anglerfish (Lophius piscatorius L.) will experience declines, while warm-water species such as red mullet (Mullus surmuletus L.) and John dory (Zeus faber L.) are expected to expand across the region. The uncertainty associated with future projections is explored through the use of 11 separate climate-ensembles. Chapter 4 uses information gained through interviews with fishers from a UK fishing port—Brixham—to explore how climate change is perceived and the factors influencing these perceptions. Findings suggest that while fishers generally felt that climate change posed a low risk to the future of their businesses and fisheries in the region, three groups emerged that showed differences in the extent to which they perceived climate change as a risk. A number of key factors were important in influencing these three groups. Chapter 5 develops further insight into fishers’ perceptions by exploring how fishers anticipate climate change to affect the physical environment, fishery resources, and their own practices in the future. Many fishers felt they would not need to alter their fishing practices in the future, with various reasons cited including personal preferences and perceived constraints to their adaptation. Fishers’ ability to adapt was further explored and three main groups were identified who differed according to a number of core dimensions of their adaptive capacity. Through adopting an interdisciplinary approach, the research in this thesis presents a number of new findings that have important implications for fisheries management and climate adaptation policies.

Background: Recent empirical research and theoretical models acknowledge that impulsive processes, can often undermine peoples’ attempts to lose weight despite currently available and effective support (Chapter 2). Aim: To develop, deliver, and evaluate an impulse management intervention to support weight loss in adults. Methods: A systematic review was conducted to identify available impulse management techniques for influencing eating behaviour (Chapter 3). Intervention Mapping was used to develop the intervention (Chapter 4) which drew on various sources including the findings from the systematic review, stakeholder consultations, existing guidance, and qualitative interviews. A two-arm randomised controlled feasibility trial (Chapter 5), with nested mixed-methods process evaluation and two cycles of intervention delivery and data collection (Chapter 6), was conducted. This assessed the feasibility and acceptability of, and informed refinements to, both the intervention and trial procedures in preparation for a full-scale effectiveness evaluation. Weight was measured as the proposed primary outcome for a full-scale trial at baseline, one-month, and three-months of follow-up, app usage data were collected at both follow-up time points, and semi-structured interviews were conducted at one-month with a subsample of intervention group participants only. Results: The systematic review critically appraised and synthesised evidence on 17 identified techniques which were categorised as Impulse-focused or Reflective techniques. Promising changes in eating behaviour and craving were found for the techniques of visuospatial loading, physical activity, and implementation intentions. Intervention Mapping resulted in development of a novel smartphone app-based intervention (ImpulsePal) aimed to reduce unhealthy snacking, overeating, and alcoholic and sugary drink consumption using impulse management techniques identified in the systematic review. Eighty-eight adults with a Body Mass Index of ≥25kg/m2 and wishing to lose weight, were recruited and randomised in a 2:1 ratio to use ImpulsePal (n=58) or to a waiting list control (n=30) group. Data were available for 74 participants (84%) at one-month and 67 (76%) at three months. Exploratory analyses suggest that the ImpulsePal group (n=43) lost 1.03kg (95% CI 0.33 to 1.74) more than controls (n=26) at one-month, and 1.01kg (95% CI -0.45 to 2.47) more at three months. Participants reported high satisfaction with the intervention and trial procedures. The process evaluation suggests that ImpulsePal and the impulse management techniques are feasible to deliver and acceptable to users. Interviews with twenty-two participants suggest that they valued having access to in-the-moment support, felt more aware of their own eating behaviour and influences on it, and felt an increased ability to resist temptations. Conclusions: This work has developed a novel, theory- and evidence-informed, person-centred app which showed potential to improve impulse management, promote healthier eating, and support weight loss. ImpulsePal is acceptable to overweight and obese adults who want to lose weight and is now ready for evaluation in a full-scale trial. The thesis discusses theoretical, methodological, and practical implications for the future development, evaluation, and implementation of digital behaviour change interventions.