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 112 for “"PCE"”.
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Professional identities in transition : the perceptions of in-service trainee PCE teachers undertaking an initial PCE teacher-training course
… the importance of the Post Compulsory Education (PCE) sector to the economy has led to an increase in the professionalisation of the sector as a whole. This in turn has led to changes in training for teachers who work in PCE - the latest of these changes took place in September 2007 and required …
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Assessment of Intrinsic Bioremediation at a PCE Contaminated Site
… Little Creek. Site 12 was contaminated with PCE waste disposed by a former dry cleaning facility. In the groundwater analysis, contaminant characteristics and redox indicators were evaluated to assess the reductive dechlorination potential of Site 12. The results of the groundwater analysis …
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Microcosms and field bioremediation studies of Perchloroethene (PCE) contaminated soil and groundwater
… as contaminants include tetrachloroethylene (PCE, perchloroethene), trichloroethene (TCE), trichloroethane (TCA), and carbon tetrachloride (CT). These chlorinated solvents are problematic because of their health hazards and persistence in the environment, threatening human and environmental …
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Evaluation of Enhanced Bioremediation for Reductive Dechlorination of Tetrachloroethene (PCE): Microcosm Study
… of partial dechlorination of tetrachloroethene (PCE) to cis-dichloroethene (cis-DCE). This study attempts to achieve complete reductive dechlorination with amendments to static microcosms to test the hypotheses that nutrient-limited or microorganism-limited conditions exist in aquifer sediments …
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Diseño e Implementación de un Programa de Cumplimiento Efectivo (PCE) con foco en anticorrupción para distribuidores de dispositivos médicos.
Cada industria tiene un set de riesgos específicos los cuales, idealmente, deben ser enfrentados por las organizaciones que operan en ellas, mitigándolos o eliminándolos. En el caso de los riesgos asociados a la corrupción, un Programa de Cumplimiento correctamente diseñado e implementado para ser …
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Vehicle Sprung Mass Parameter Estimation Using an Adaptive Polynomial-Chaos Method
The polynomial-chaos expansion (PCE) approach to modeling provides an estimate of the probabilistic response of a dynamic system with uncertainty in the system parameters. A novel adaptive parameter estimation method exploiting the polynomial-chaos representation of a general quarter-car model is …
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Estimation of Uncertain Vehicle Center of Gravity using Polynomial Chaos Expansions
… study is the use of polynomial chaos expansion (PCE) to analyze the uncertainty in calculating the lateral and longitudinal center of gravity for a vehicle from static load cell measurements. A secondary goal is to use experimental testing as a source of uncertainty and as a method to confirm the …
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P3HT:PCBM-based organic solar cells : Optimisation of active layer nanostructure and interface properties.
… cell exhibiting the highest performance with PCE reaching 2.73% among other devices prepared using different solvents. Further device performance improvement was observed through optimization of active layer thickness with studied thickness falling in range 65-266 nm. Measurements of the PV …
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Bioindicators of Reductive Dechlorination in a Dehalococcoides ethenogenes-Containing Mixed Culture: Transcriptional Trends With Respect to Substrate Type, Substrate Concentration, and Culture Operation
… of reductively dechlorinating tetrachloroethene (PCE) successively to trichloroethene (TCE), cis-1,2-dichloroethene (cDCE), vinyl chloride (VC), and non-toxic ethene using H2 as electron donor. Gene transcripts associated with general cell activity, including those corresponding to 16S rRNA and …
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The Feasibility of Bioaugmentation for the Remediation of Chlorinated Solvents: A Microcosm Study
… at Superfund sites. Perchloroethylene (PCE) and its degradative byproducts pose a particular problem because of their persistence in the subsurface and their threat to ecological health. In this study, microcosms were used to test the viability of bioaugmentation as a possible …
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Isolation and Ecology of Bacterial Populations Involved in Reductive Dechlorination of Chlorinated Solvents
… isolate, designated strain SZ, was isolated from PCE-to-ethene dechlorinating microcosms established with creek sediment. 16S rRNA gene sequence of the strain SZ indicates that the new isolate is affiliated with the genus Geobacter most closely related to G. thiogenes. Strain SZ is capable of …
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The Microbubble Assisted Bioremediation of Chlorinated Ethenes
… two were not fed a substrate. A 30 micromolar PCE solution was delivered to the consortia at 3 ml/min. Microbubbles containing a mixture of 90% hydrogen and 10% carbon dioxide were effectively produced in a closed spinning disk generator, and were acceptable for delivering the gases to the …
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Uncertainty quantification in the dynamic analysis of offshore structures
… low probability. Polynomial chaos expansion (PCE) is one approach used in developing such surrogate models. However, conventional PCE relies on parametric families to define the polynomials for expansion. Also, for high-dimensional problems, PCE can be inefficient if appropriate dimension …
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Nanocarbons as charge carriers in organic solar cells
… in OPV to improve power conversion efficiency (PCE). Functionalized multi-walled carbon nanotubes (MWNTs) are used as additives to C70 to form a weak bonded composite, which result in better absorption and better phase separation. Consequently, PCE increases 70%. In another set of experiments, …
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Investigation on the Mechanism of Formation and Consumption of Vinylcobalamins Involved in Vitamin B(12)-Catalyzed Reductive Dechlorination of Perchloroethylene
… the vitamin B12-catalyzed dechlorination of PCE. Chlorovinylcobalamin 16, previously detected in the PCE dechlorination reaction, was synthesized by treating cob(I)alamin with chloroacetylene. The structure of 16 was confirmed by X-ray crystallography, and is the first reported structure of …
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Data-Driven Polynomial Chaos Expansions for Uncertainty Quantification
… respect to inputs, polynomial chaos expansions (PCEs) are widely used. However, a majority of existing PCEs impose parametric distributional assumptions on inputs. Furthermore, existing sensitivity indices for dependent inputs impose strong assumptions on the dependence structure of the inputs or …
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Development of a methodology for measuring delay-based passenger car equivalent for heavy vehicles at signalized intersections
… methods for measuring passenger car equivalent (PCE) for heavy vehicles at signalized intersections are based on headway concepts, and are mainly focused on adjusting the ideal saturation flow rate. They do not reflect the total effect of heavy vehicles on delay. The constant PCE value, which is …
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