Dissertations / Theses on the topic 'Occupational Safety and Health Administration'

This safety research project explores the key factors that contribute to world-class safety programs for firms in the construction industry. A world-class safety program for this study is defined as a safety culture supported by all employees, and a work environment where accidents are not tolerated; zero accident mentality. This study used the Delphi methodology to identify the leadership qualities and safety processes that a company's leadership employs to influence an overall successful safety program in their organizations. The Delphi methodology obtained subjective judgments from the Delphi expert panel (55 members participated) to create objective safety information through an iterative process that is beneficial to the entire construction industry. The Delphi panel members were composed of 75% from subcontractor trades, 18% from construction managers, and 7% from construction trade associations. The Delphi expert panel reached consensus on 67 leadership qualities and 85 safety processes that improve safety performance. The 67 leadership qualities were consolidated to eight major leadership quality categories which include commitment, integrity, accountability, competence, value people, visionary, lead by example, and culture. The 85 safety processes were consolidated to four major safety process categories which include learning organization, structure, measurement and culture.

Inadequate leadership is the reason workplace accidents in the mining industry remain high, making the industry one of the most hazardous operational activities in the world. Unsafe leadership practices may result in death or injury to workers. A group of 30 mining company leaders from 3 gold mines in Zimbabwe revealed an exception to these hazardous practices, however, notable through their outstanding safety improvement records. To better understand what these practitioners were doing, this multicase study research design explored their strategies to improve the workplace safety environment in the mines. Data were collected using audio-recorded semistructured interviews and document analyses. Shewhart’s plan-do-check-act conceptual framework anchored the study. Data analysis followed the thematic data analytic approach involving classification, coding, and interpretation to identify common themes. The following themes emerged: planning and organizing, leading, and risk management. The findings indicate that the business leaders created a safe work environment by planning the work to be performed; how the task would be executed; and when, where, and who performed the task. The results of study also indicate that leaders designed the work environment, trained, empowered, and equipped employees with the relevant skills, and provided appropriate technology and personal protective equipment to improve workplace safety. Finally, the research findings indicate that leaders embedded risk management principles and practices in every process or activity, and continuously learned from each event to create a safe work environment. The findings promote social change by encouraging safe behavior and risk-based thinking and practices in the workforce and the community.

This quantitative survey study explored relationships between a law enforcement supervisor's personal characteristics and the attitude a supervisor had towards the Critical Incident Stress Management (CISM) program. The study solicited law enforcement supervisors (n = 6635) who were graduates of the Federal Bureau of Investigation's National Academy (FBINA). A modified survey instrument assisted in the collection of demographic data and the assessment of attitudes towards the CISM program. Descriptive statistics and inferential statistics in the form of an analysis of variance (ANOVA) statistical test and a multiple regression analysis that used a backwards-stepwise format assisted in the examination of the collected data. The results indicated time away from the duties of a line-level patrol officer, investigator, or detective, and time in law enforcement shared a weak relationship with a supervisor's attitude towards the CISM program. More specifically, the longer the time span for each, the more positive the supervisor's attitude should be towards the program. Unfortunately, while these variables may have been deemed significant, the results are virtually meaningless since the model resulted in only two percent of the variance in attitude. Although the study's findings only indicated a weak link between a law enforcement supervisor's characteristics and the attitude a supervisor has towards the CISM program, it also showed supervisors within the study overwhelmingly supported the program. Knowing this support exists could still provide stress management program managers with invaluable insight, as processes are developed to mitigate critical incident stress in law enforcement.

Health and wellness is essential to each individual's quality of life. The importance of health and wellness is not only of an individual concern but also a population-based societal concern. Currently there is growing epidemic or obesity as 65% of American adults are either overweight or obese. The work setting is an ideal location to foster healthy behaviors as most adults spend the majority of their day there. The need for health-related activities is supported in many different types of workplaces, especially in higher education settings. This study aimed to explore the relationship of a health promotion program using pedometers on the health-related indicators of the SF-36v2 and vital functioning of the participants in a college setting. The association of participant's health promotion level to changes in health-related indicators and vital functioning was also explored.

A pre-test post-test experimental design was conducted with a convenience sample of 29 participants. All 29 participants completed the pre-test, the 6 week health promotion program using pedometers, and the first post-test (post-test 1). Only 15 individuals completed the second post-test (post-test 2) which was administered six months after the completion of the health promotion program. Paired sample t tests analyzed the difference in scores of each participant from pre-test (baseline) to post-test 1. The paired sample t tests reported a significant improvement in the component summary and subtests of the SF 36v2 such as the mental health component summary (p = .013), physical functioning (p = .015), vitality (p = .033), and mental health (p = .005). The linear regression analysis revealed mental health component summary scores were a highly significant predictor of vitality (β = 1.075, p = .001), accounting for 50.5% of the variance in vitality. Vitality is unique to each individual. This construct can affects one's ability to activity engage in their roles and occupations.

Health and wellness support role performance. The roles of most adults consist of worker, friend, and family member. Fulfillment of roles and meaningful activities supports balance and quality of life. Having the physical and mental capability to perform one's roles in a variety of contexts leads to engagement and satisfaction. Sustenance of a healthy lifestyle via physical activity is also an integral component of wellness. Utilizing technology and support within the social, virtual, and physical environments have all been shown by this study to improve quality of life indicators. Improvements were noted to statistically support the use of pedometers, points of decision prompts, and email correspondence to increase physical activity levels as well as stages of health promotion.

The purpose of this study was to identify ideas about how occupational safety and health (OSH) professionals influence decision-makers on matters impacting occupational health and safety management systems. A modified nominal group technique was used that involved 67 participants in ten nominal groups and identified the most important ideas about how OSH professionals can influence workplace safety and health decision making. The research produced themes of communication, scientific, professionalism, leadership, adaptability, and business acumen that resulted in six domains of occupational safety and health professional influence.

Heat stress is a recognized occupational hazard present in many work environments. Its effects increase with increasing environmental heat loads. There is good evidence that exertional heat illness is associated with ambient thermal conditions in outdoor environments. Further, there is reason to believe that risk of acute injury may also increase with the ambient environment. For these reasons, the assessment of heat stress, which can be done through the characterization of the wet bulb globe temperature (WBGT), is designed to limit exposures to those that could be sustained for an 8-h day. The ACGIH Threshold Limit Value (TLV) for heat stress was based on limited data from Lind in the 1960s. Because there are practical limitations of using thermal indices, measurement of physiological parameters, such as body temperature and heart rate are used with environmental indices or as their alternative.

The illness and injury records from the Deepwater Horizon cleanup effort provided an opportunity to examine the effects of ambient thermal conditions on exertional heat illness and acute injury, and also the cumulative effect of the previous day’s environmental conditions. The ability of the current WBGT-based occupational exposure limits to discriminate unsustainable heat exposures, and the proposal of alternative occupational limits was performed on data from two progressive heat stress protocol trials performed at USF. The USF studies also provided the opportunity to explore physiological strain indicators (rectal temperature, heart rate, skin temperature and the Physiological Strain Index) to determine the threshold between unsustainable and sustainable heat exposures. Analysis were performed using Poisson models, conditional logistic regressions, logistic regressions, and receiver operator curves (ROC curves).

It was found that the odds to present an acute event, either exertional heat illness or acute injuries increased significantly with rising environmental conditions above 20 °C (RR 1.40 and RR 1.06, respectively). There was evidence of the cumulative effect from the prior day’s temperature and increased risk of exertional heat illness (RRs from 1.0–10.4). Regarding the accuracy of the current TLV, the results of the present investigation showed that this occupational exposure limit is extremely sensitive to predict cases associated with unsustainable heat exposures, its area under the curve (AUC) was 0.85; however its specificity was very low (specificity=0.05), with a huge percentage of false positives (95%). The suggested alternative models improved the specificity of the occupational exposure limits (specificities from 0.36 to 0.50), maintaining large AUCs (between 0.84 and 0.89). Nevertheless, any decision in trading sensitivity for specificity must be taken with extreme caution because of the steeped increment risk of heat related illness associated with small increments in environmental heat found also in the present study. Physiologic heat strain indices were found as accurate predictors for unsustainable heat stress exposures (AUCs from 0.74 to 0.89), especially when measurements of heart rate and skin temperature are combined (AUC=0.89 with a specificity of 0.56 at a sensitivity=0.95). Their implementation in industrial settings seems to be practical to prevent unsustainable heat stress conditions.