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 11 of 11 for “"sampling conditions"”.
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Detection of hydrogen peroxide and ethanol in exhaled breath using biosensors: Considerations in standardizing breath collection
… but they are both affected by different sampling conditions. Additionally, volatile organic compounds (VOCs) and nonvolatile organic compounds (non-VOCs) in the breath matrix are retained differently under varied sampling conditions. The dearth of information on how sampling conditions …
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Chemometric methods for the analysis of process spectra using minimal reference data
… are often heterogeneous and highly concentrated; sampling the batch throughout the course of the reaction for off-line analysis can be problematic and therefore introduce significant error into measured reference values.An alternative approach that combined Self-Modelling Curve Resolution (SMCR) …
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Decomposition of Urban CO2 Fluxes into Fossil and Biogenic Components using a novel Relaxed Eddy Accumulation System
… no significant bias between upwind and downwind sampling and that concentration differences between the flask pairs agree with the differences of in situ measurements within (0.02 +- 0.21) ppm. In total, 300 flask pairs were collected, of which 95 were analyzed for 14CO2. These were grouped and …
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Design and Optimization of Four-Dimensional Cone-Beam Computed to mography In Image-Guided Radiation Therapy
… of 4D-CBCT to reduce the impact of undersampling artifacts with short scan times. This work measures the impact of undersampling artifacts on the accuracy of target motion measurement under different sampling conditions and for various object sizes and motions. The results provide a …
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Seasonal habitat use and survival of brown trout (Salmo trutta) in Oatka Creek, Monroe County, New York
… as the study continued; however, variable sampling conditions, especially discharge, were likely responsible. Relatively normal year-class distributions suggest that the population is recovering. The relative abundance of large trout (400+ mm TL) was greater than expected, which may be a …
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On low-pass reconstruction and stochastic modeling of PWM signals
… is offered as a PWM generator and different sampling methodologies are discussed. For natural sampling, where the input signal is compared to the reference signal directly, lossless sampling conditions are derived. For a sawtooth reference signal, the convergence characteristics between …
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Fundamental Capillary Electrophoresis: An Evaluation of Electrokinetic Sampling
… the primary focus on effects of electrokinetic sampling conditions. Data supporting longer sampling times and higher sampling voltages contributes to reproducibility relative standard deviation values of less the 2%. Injection plug lengths elucidated from sampling criteria are also …
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The interactive effects of data categorization and noncircularity on the sampling distribution of generalizability coefficients in analysis of variance models : an empirical investigation
… to conduct a series of simulations under various sampling conditions. Five independent parameters were considered in the simulations: (a)three levels of repeated measures (3, 5, 7); (b) three G coefficients (.60, .75, .90); (c) three epsilon values (.50,.70, 1.0); (d) three sample sizes (15, 30, …
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Bedrock target analysis for ROV rockdrill sampling and existing sample stratigraphic and mineralogical verification (BeTar_drill)
… task due to issues regarding access and sampling conditions. As a result, a lack of both knowledge and detail generally exists for offshore outcrop, which is in stark contrast to typical terrestrial geological data. Modern advances in marine robotics and seafloor imaging techniques has …
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Topographic characterization of polymer materials at different length scales and the mechanistic understanding of wetting phenomena
… an adequate selection of optimal sampling conditions (cut-off length and resolution) were done by a systematic procedure proposed for periodic and non-periodic surfaces. Topographical characterisation of the surfaces was realized by an innovative methodology, separately considering …
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Patterns in verbal interaction: the effect of situational influences on the language performance of eight-year-old children
… in natural settings and under different conditions. Recorded conversations, both in the home and at school, were obtained from a group of 12 eight-year-old boys and girls in a range of interaction situations. The children came from the same school, situated in a largely middle-class …