Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 64 for “"Exposure assessment"”.
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Exposure Assessment of Mercury in Fish from Kentucky Surface Waters
… of fish contaminated with mercury is the primary exposure pathway by which humans are exposed to mercury. Mercury is known to be a neurological toxin that can cause attention and language deficits, impaired memory, and impaired visual and motor function, especially in children under the age of …
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Adjusting retrospective noise exposure assessment for use of hearing protection devices
Earlier retrospective noise exposure assessments for use in epidemiological research were not adequately characterized because they did not properly account for use of hearing protection devices (HPD) which would result in potential misclassification. Exposure misclassification has been shown to …
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A statistical investigation of ozone exposure assessment by direct and indirect measurement
Recent studies have proposed the application of exposure-based criteria in developing alternative primary ambient ozone standards. Historically, epidemiological studies of ozone have approached exposure assessment in a simplistic fashion with simplistic methods used to estimate ambient ozone …
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Novel Approaches to Exposure Assessment and Dose Response to Contaminants in Drinking Water and Food
… health. Thus, this dissertation focuses on risk assessment and applying novel methods for exposure assessments and dose responses to contaminants in drinking water and foods. Factors that greatly impact contaminant exposures and human dose response include: population susceptibility (i.e., …
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Exposure Assessment to Estimate the Population Exposed to Low Air Quality from Wildfires in Metro Vancouver, British Columbia, Canada
… severe wildfire seasons, leading to increased exposure to PM2.5, which can cause respiratory issues and even death. Hourly PM2.5 data from air quality monitoring stations across the Metro Vancouver Regional District (MVRD) between 2014 and 2023 were aggregated to daily values. The weighted …
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Balancing efficiencies and tradeoffs in epidemiological field studies : evaluating EMG exposure assessment for low back injury risk factors in heavy industry
… need efficient, accurate occupational exposure assessment methods suitable for large samples. The chapters in this thesis examine critical decisions using electromyography (EMG): How should exposure be measured? For what duration? Who should be measured, and how many times? Low-back …
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Measurement Error in Exposure Assessment: An Error Model and its Impact on Studies on Lung Cancer and Residential Radon Exposure in Germany
… studies on lung cancer and residential radon exposure had been conducted in Germany. Relative risk estimates from primary analysis were now subject to accounting for uncertainties in radon exposure and in the most potent confounder smoking. The regression calibration method and an approximate …
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A comparison of runoff- and spray-drift-related pesticide contamination in agricultural surface waters : exposure, effects and mitigation
… have directly compared these routes in a risk assessment scenario. Accordingly a risk assessment approach was instituted to determine differences between runoff and spray-drift based on exposure, effect and mitigation. An exposure assessment using predictive modelling that was validated by …
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Determinants of occupational allergic respiratory disease and asthma in spice mill workers
… in a spice mill was conducted. Environmental exposure assessment entailed the collection of 62 full-shift airborne personal samples on randomly selected individuals employed in various departments of the spice mill using the NIOSH occupational exposure sampling strategy manual. The samples …
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The Battle Creek Health Study: A retrospective cohort study of the health effects of volatile organic chemicals with individual estimate of exposure based on time-modeling
… historic cohort study based on concepts of risk assessment for chemical toxicity, mainly a thorough exposure assessment, rigorous quality control of all study components, an analysis focusing on dose-response relationships, and an assessment of the impact of uncertainties in data and methods on …
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Factors associated with the bioaccumulation of mercury in human hair following consumption of fish from the Great Lakes region
… in potential human health risks arises from exposure to different media. The Great Lakes region, for instance, is an area of known mercury pollution. This project examines the relationship between fish consumption of a sensitive human population and the concentration of mercury in humans …
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Modelling the fate and bioaccumulation potential of organic chemicals in China
… their fate in the environment and corresponding exposure to organisms (including humans) has only been measured for a limited number of substances. Modelling tools have been demonstrated to be an economical alternative to measurement data for the assessment of chemical fate and exposure. …
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Indoor environment and the impact on the health of pre-existing asthmatics at work: the development of a risk management framework
… carried out in Guernsey before. In addition, exposure assessment of individuals is rarely carried out and research in this area is limited due to the complexity of undertaking such a study, which will include a combination of exposures in the home, the workplace and ambient exposures, which …
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Opportunities and Challenges in Identification and Classification of Heat Stress Risk Based on Analysis of Individual and Neighborhood Level Factors
… via wearable sensors will allow more accurate exposure assessment and identification of factors associated with dangerous exposures to extreme heat. The goal of this dissertation is to characterize the individually experienced heat index exposure via wearable sensors in an urban and a rural …
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Investigation of Persistent Organic Pollutants in Breast Milk // Изследване на устойчиви органични замърсители в майчино мляко
… conducted in European and Asian countries. The assessment of exposure through calculated daily intake and the comparison with EU regulatory norms showed that breast milk consumed by infants did not pose a risk to their health. The exposure assessment indicated that the benefits of breastfeeding …
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New Opportunities in Crowd-Sourced Monitoring and Non-government Data Mining for Developing Urban Air Quality Models in the US
… from different sources to improve air pollution exposure assessment. My dissertation investigates how new data sources of air quality (e.g., community-based monitoring, low-cost sensor platform) and model predictor variables (e.g., non-government open data) based on emerging modeling approaches …
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Effects of Wave Action on the Structure of Fish Assemblages Across an Exposure Gradient
… and diversity of ecosystems. Increased wave exposure to salt marsh can disturb sediments and cause a loss of habitat. The purpose of this study was to explore the effects of increased wave exposure on diversity, abundance, and functional ecology of estuarine fishes. If increased wave exposure …
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