<p>Physical inactivity is one of the leading risk factors for major non-communicable diseases, which contribute substantially to the global burden of chronic diseases, disability and death. The burden of disability, morbidity and mortality, attributable to non-communicable diseases, is currently enormous in the developed countries and is increasingly growing in the developing countries. The purpose of this study was to investigate the relationship between participation in physical activity and health risk behaviours among high school students in the Mtwara region, Tanzania. The objectives of this study were to identify the physical activity levels among high school students in Mtwara region, Tanzania, to identify health risk behaviours among the above mentioned high school students, to identify the factors that influenced them to engage in health risk behaviours and to establish the relationship between physical activity and health risk behaviours.</p>

Urban drinking-water supplies are still implicated as pathways for the transmission of waterborne disease. A move toward risk informed, proactive water system management has occurred over the past decade and is advocated in current international drinking water guidelines. Quantitative Microbial Risk Assessment (QMRA) is a tool with potential for aiding health risk management; however the refinement of scientific based practical methods to support that philosophy still requires development. This thesis focused on the water utility, its responsibility to manage microbial water safety, and how probabilistic QMRA may aid in developing management strategies. A framework for waterborne disease risk assessment from urban supply systems was derived and tested on an Australian case study. The main premise was that, in order for risk assessment outcomes to inform the management process, the steps should incorporate the concepts of risk variability, the explicit event conditions that can drive it, and that examination of QMRA sensitivity to various risk scenarios/model uncertainties is undertaken. The identified management uses were: (i) prioritising for attention issues hampering the system's ability to meet or the assessor's ability to interpret against (e.g. knowledge gaps about the system), a water quality health target; and (ii) identifying potential strategies or control points for addressing those issues. Additionally, rarely occurring, high impact, adverse fluctuations in treated water quality (and consumer infection risks), especially from source water contaminant "peaks", are highly, nearly totally, influential over the extent of risks averaged over longer, say annual, periods. As such, a case is made calling for widespread adoption of health targets that refer to tolerable consumer risks per exposure, rather than or as well as the current common practice of expressing targets in terms of risks from exposure over a year or lifetime. Doing so may provide incentive and opportunities for improved management, and the future derivation of specific microbial treatment or treated water quality targets, with a view toward protecting the community from extreme high risk periods associated with disease outbreaks.

Over the centuries, the assessment of risk has become an integral part of the decision process. Assessment techniques have developed to meet different applications, but all have problems and none is entirely suited to the assessment of risks relating to fire. This dissertation examines the development of risk assessment processes and frameworks, identifying common features and problems and key differences in approach. Despite generically similar approaches, different applications have led to the development of many different paradigms, none of which appears to be entirely suitable for application to building and infrastructure fires. Current fire risk assessment methods which incorporate important advances in fire modelling and Monte Carlo simulation, rely on a fire engineering approach. They tend to consider only the limited range of fire safety systems that are directly involved in construction, failing to address many of the procedural and other activities that can overwhelm traditional controls, and taking insufficient account of interactions between different controls and the factors that influence them. Further, comparative risk levels are generally evaluated against the ill-defined scenario of current practice, as defined in outdated prescriptive regulations. The result is that catastrophic consequences continue to occur, despite the presence of traditionally accepted controls. The problem is to find a framework that evaluates the sensitivity of levels of risk in fire against a defined, uncontrolled state, taking into account the effects of a comprehensive range of factors and controls. A new approach to risk assessment that addresses a comprehensive set of factors and controls and evaluates the event without, and with, controls, is considered. The framework, together with the steps for its implementation, appears to provide a versatile and flexible method of risk assessment. It is likely that the framework can be applied to all risk assessment situations. A study is undertaken to investigate the impact of factors and interactions that are not commonly taken into account in fire risk assessment. The chosen situation is a fire in the driver???s cab of a train. Current driver procedures are examined, and fire growth rates for specified materials are considered. Using the fire spread model CFAST, conditions in the cab for a range of ventilation conditions and fire growth rates are calculated. Threshold levels that determine response times for engineered and human controls and tenability, and common factors that influence consequences, can play a critical role in modelling the decision process. A driver???s decision model is proposed that determines the impact of the driver???s decisions to adjust ventilation by opening or closing windows and doors, and to extinguish the fire. The model takes into account time to respond and time to perform the necessary activities. The study shows that, even with a limited choice of actions, the decisions of the driver can have a critical effect on the outcome of a fire in the driver???s cab, altering the situation from a controlled to an uncontrolled state. Recommendations are made for further development of the new risk assessment framework, and for the development of fire modelling for risk assessment purposes. Finally, recommendations are made for the continuation of the development of the train driver response model that would result in the generation of driver decision support software.

This thesis examines the relationship between corporate governance, risk assessment and debt contracting within the Australian context where companies are heavily reliant on intermediated debt financing.

In a semi-longitudinal exploratory study using observational and in-depth interviewing methods the following questions were explored through an intensive analysis of 10 families involving 17 allegedly abused children. / 1. What are the factors to which social work practitioners in different organisational settings (a hospital based child abuse service and a statutory child protection service) give salience in their assessment of alleged child abuse cases and what is the nature of their observed models of practice? / 2. What is the nature of the interaction between different organisations, and in particular between the core organisations (the hospital, police and child protection services) in cases of alleged child abuse? / 3. How do parents perceive their experiences related to the alleged abuse of their children, and how do they perceive their interactions with core organisations? / Professionals were interviewed about their unfolding perceptions throughout the life of each case, with a total of 134 interviews being conducted with practitioners (an average of 13.4 per case). A total of 46 practice episodes were also observed (an average of 4.6 per case), including office interviews, home visits, groups sessions, meetings, case conferences and a court hearing. For all but one of the ten families it was also possible to conduct lengthy, in-depth home interviews with the parents about their experiences relating to the alleged abuse and their contact with services, thus bringing the combined total of professionals' and parents' in-depth interviews to 143. / A content analysis of the field notes yielded a number of themes and key findings. In relation to the first question, it was found that social workers in both the hospital and the child protection service gave salience to quite different variables and both groups attended to a much narrower range of variables than the framework of psycho-social assessment traditionally taught in professional social work education. / In relation to the second question, it was found that a pattern of marked tensions was evident in the relationship between the child protection service and both the hospital and the police. This mirrored the inter-organisational tensions which existed at a broader political level between these organisations. The tensions at the service delivery level were conceptualised as gate keeping disputes, dispositional disputes and domain disputes.

Research on the factors underlying sex offender recidivism has not considered the importance of the reintegration process through which the offender rejoins the community after prison. This thesis reports findings from 3 empirical studies designed to explore whether poor release planning might contribute to sex offender recidivism. In Study 1, a coding protocol was developed to measure the comprehensiveness of release planning for child molesters, which included items relating to accommodation, employment, pro-social support, community-based treatment, and Good Lives Model (T. Ward & C.A. Stewart, 2003) secondary goods. The protocol was retrospectively applied to groups of recidivist and nonrecidivist graduates of a prison-based treatment programme, who were matched on static risk level and time since release. As predicted, overall release planning was significantly poorer for recidivists compared to nonrecidivists. Study 2 was a validation and extension of Study 1. The original coding protocol, and some revised items, were applied to matched groups of recidivists and nonrecidivists from a different treatment programme. Consistent with Study 1 findings, overall release planning was significantly poorer for recidivists. Data from Studies 1 and 2 were pooled (total N = 141) and Cox regressions showed that accommodation, employment, and social support planning combined to best predict recidivism, with predictive accuracy comparable to that obtained using static risk models. Study 3 investigated whether release planning was associated with actual reintegration experiences, and additionally explored released child molesters’ good lives plans. Release plans were rated for 16 child molesters, who were interviewed post-release about their reintegration experiences and good lives plans. As predicted, significant positive correlations were found between release planning and reintegration experiences 1 and 3 months following prison release, and results suggested that effective reintegration might help facilitate living a good life. Overall, results from the 3 studies suggest that poor release planning and subsequent reintegration experiences contribute to sex offender recidivism. Implications for researchers, clinicians, policy makers, and community members are discussed.

Globally, there is an increasing tendency for occupational legislation and practice to require that employers actively involve their employees in the process of identifying, assessing and addressing the risk of injury in the workplace. Despite this, there is a paucity of research evaluating the effectiveness of participatory ergonomics in reducing occupational injury outcomes. In particular, a review of the literature fails to identify research that reports a change in the risk of injury at the level of the individual worker. The objectives of this study were to determine whether a participatory ergonomics approach to the control of workplace hazards and manual hazards in particular, could reduce the occurrence and severity of injury among a working population at risk.The research design was that of a longitudinal pre-post intervention study, with one intervention and three comparison groups. The observational period between 1 July 1988 and the 31 October 1995, comprised a 4.3 year pre-intervention period and a 3- year post-intervention period. The Intervention Group was a population of hospital cleaners at a high risk of injury. Three comparison groups were used, namely orderlies from the same hospital, cleaners from a similar hospital, and all the cleaners in the State of Western Australia. The primary outcome measure of occurrence was that of a lost- time injury (LTI).To obtain parameters of injury severity, each LTI was measured in terms of the associated CP1-adjusted workers' compensation claim cost and the number of hours lost from work (duration). The data were obtained three years after the observational period, to improve the likelihood that the claims had been finalised. Aggregate level LTI data were obtained for all four groups. Individual-level data were also obtained for the Intervention Group and the Orderly Services Group, whether injured or not. These ++ / data included the age, gender, hours worked and work experience of the subjects. Also, where there was an LTI, it was determined whether or not the mechanism of injury was from manual handling. Using these data, two analytical approaches were then undertaken. Study 1 assessed the aggregate-level LTI data of the four groups. Study 2 evaluated individual-level data for the Intervention Group and the Orderly Services Group.The results demonstrate statistically significant post-intervention reductions In all measures of LTI occurrence for the Intervention Group. In particular, after allowance for age, gender and work experience, there was a two thirds reduction in the rate of LTI per hour worked. No reduction in injury occurrence was observed for any of the comparison groups. The severity of each injury, as measured by claim cost and duration, did not change after the intervention for the Intervention Group.This study indicates that a small group of unskilled workers, with the facilitation of an ergonomist, can successfully undertake an iterative process of identifying and assessing hazards and make recommendations for their control. In doing so, even where the primary focus is on manual handling hazards, a reduction in the risk of injury from both manual handling and non-manual handling mechanisms can be achieved. Participatory ergonomics, by investing hazard management skills within employees, increases the likelihood that solutions to problems will be accepted, and should release ergonomists to consult to a greater number of workplaces than if they work independently of employee participation. The evaluation of interventions in a variety of workplace settings is recommended, to confirm participatory ergonomics as an effective tool for the reduction of the global burden of occupational injury.

Thesis (M.P.H.)--Georgia State University, 2007. / Title from file title page. Russ Toal, committee chair; Michael Eriksen, Valerie Hepburn, committee members. Electronic text (102 p. : ill. (some col.)) : digital, PDF file. Description based on contents viewed Mar. 26, 2008. Includes bibliographical references (p. 71-73).

Thesis (Ph. D.)--University of Washington, 2007. / Vita. Includes bibliographical references (p. 200-214).

Thesis (M.S.)--University of Nevada, Reno, 2006. / "May, 2006." Includes bibliographical references (leaves 33-35). Online version available on the World Wide Web.