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 2618 for “"contamination"”.
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Imagery and Contamination Aversion
<p>Contamination-based obsessive-compulsive disorder (OCD) is the most common form of OCD. Recent research indicates that the emotion of disgust may play a primary role in the etiology and maintenance in contamination-based OCD (CB-OCD). However, little is known about the effects of disgust on …
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Indigenous Resource Management and Environmental Contamination
Heavy metals are potential contaminants which can produce negative impacts on human health which vary from metal to metal, and are also dependent upon concentration and duration of exposure to the contaminant. This study lists the human health effects of 5 heavy metals; copper, arsenic, cadmium, …
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Laboratory investigation of insulator contamination problems
This thesis deals with the practical aspect of the laboratory examination of contaminated insulators. A technique which gives a pollution curve for cylindrical insulator models is described. The technique is later extended to apply to practical insulator shapes, giving curves which can be used to …
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Finite element analysis of groundwater contamination
… to assist in the understanding of groundwater contamination problems. It was mainly aimed at studying the extent and manner of travel of contaminants in the saturated soil of unconfined aquifers which may be pumped by of wells.
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Native plants as sentinels of tritium contamination
… in the Mojave Desert, as sentinels of tritium contamination below earthen caps covering radioactive waste. The plants, grown in hydroponic tanks and 3 m columns, were evaluated for treatments representing three different levels of tritium contamination. Tritium, a radioactive isotope of …
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Decontamination method comparison testing using simulated contamination
Radiological decontamination of surfaces is challenging. Cleanup tasks are typically visual or even chemically measured, but radioactive contamination is invisible and measured at extremely low levels. Different contamination events have lead to the development of hundreds of decontamination …
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Phytoremediation of Metal Contamination Using Salix (Willows)
… tolerance characteristics of cadmium and lead contamination. I found that <em>S. drummondiana</em> accumulated more cadmium in stems than both <em>S. monticola</em> and <em>S. planifolia</em>, and that all three willow species accumulated similar concentrations of lead. I found similar trends …
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Variance Contamination Due to a Systems Environment
This dissertation analyzed the use of standard costing for exception reporting in a systems environment. Standard costing, when used with a ex post flexible budget, has been commonly used in accounting to support management by exception. An assumption of responsibility center accounting is that …
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Particle contamination of high voltage DC insulators.
Thesis. 1978. Ph.D.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
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Managing ground water contamination from agricultural nitrates
Ground water contamination from agricultural nitrates poses potential adverse health effects to a large segment of the rural population of the United States. Contamination is especially prevalent in livestock intensive areas, which produce large quantities of animal waste with substantial nitrogen …
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Contamination effects in a laminar proportional amplifier
… gain curves were obtained after each stage of contamination for various loading conditions. Photographs showing the location of contaminant deposits were taken. Two inlet geometries were studied: right-angle and straightthrough. The effects of maintaining a constant pressure and constant flow …
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Local dose coefficients for radionuclide contamination in wounds
The objective of this research is to create local dose coefficients for radionuclide contaminated wounds to accompany dose coefficients obtained by Oak Ridge Institute for Science and Education looking at whole body effects of radionuclide intake from wounds. These dose coefficients can be used to …
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Experimental manure handling systems for reducing airborne contamination
… test a manure handling system to control the air contamination from the excreta. The goal was to get close to zero air contamination from manure with these systems, in order to measure the contamination from other sources, and to also have a range of contamination levels for future health and …
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Recovery of the Mersey Estuary from Metal Contamination
… reservoir remains a repository of historical contamination and still contains high concentrations of trace metals and organic compounds. A combination of hydrodynamic, sedimentary and geochemical processes are responsible for maintaining trace metal concentrations at present-day levels. The …
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Organophosphorous insecticide contamination in streams: Insects as bioindicators
1 PDF file (xii, 171 pages)
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Reducing blood culture contamination in the emergency room
Purpose/Objectives: When blood culture contamination in emergency departments is above 3%, it is associated with adverse patient outcomes, inappropriate antibiotic use, and increased hospital costs. In a large, Midwestern, level I trauma hospital, there is a blood culture contamination (BCC) rate …
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Mechanisms of fixed contamination of commonly engineered surfaces
… onto the surface of stainless steel. Fixed contamination on contaminated metallic surfaces is commonly removed using (electro) chemical methods. The most common methods employed are the use of mineral acids or MEDOC (Metal Decontamination by Oxidation with Cerium). However, these result in …
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Sparse functional regression models: minimax rates and contamination
In functional linear regression and functional generalized linear regression models, the effect of the predictor function is usually assumed to be spread across the index space. In this dissertation we consider the sparse functional linear model and the sparse functional generalized linear models …
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Reducing spacecraft thruster plume contamination using convex optimization
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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Arsenic contamination study of drinking water in Nepal
A study of arsenic contamination of drinking water in Nepal was conducted. Samples were collected in Nepal in January 2000 from tube wells, hand dug wells, natural springs, municipal systems and surface water bodies. Samples were analyzed in Nepal using EM Quant@ test strips and Affiniti …
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