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 80 for “"mixing model"”.
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ADVANCING METHODS FOR APPORTIONING THE SOURCES OF SEDIMENT IN RIVERS: COMBINING SPECTROSCOPY AND STABLE ISOTOPES WITH BAYESIAN MIXING MODELS
… sources to fluvial sediment load via a mixing model approach. However, there remain significant shortcomings in sediment fingerprinting practice, specifically relating to difficulties in producing high-temporal resolution apportionment estimates, inconsistencies in mixing model …
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Coastal ocean variability off the coast of Taiwan in response to Typhoon Morakot : river forcing, atmospheric forcing, and cold dome dynamics
… Systems (MSEAS) primitive-equation ocean model. We did this by focusing on the complex region surrounding Taiwan, and the period of time immediately following the passage of Typhoon Morakot. This area and period were studied extensively as part of the intense observation period during …
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Coastal ocean variability off the coast of Taiwan in response to typhoon Morakot : river forcing, atmospheric forcing, and cold dome dynamics
… Systems (MSEAS) primitive-equation ocean model. We did this by focusing on the complex region surrounding Taiwan, and the period of time immediately following the passage of Typhoon Morakot. This area and period were studied extensively as part of the intense observation period during …
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Modeling target rock composition of two impact events
… a unique window into this time. This study models target rock compositions of two Archean-Paleoproterrozoic impact events, represented by the Dales Gorge–Kuruman (~2.49 Ga) and Paraburdoo–Reivilo (~2.57 Ga) spherule layer pairs. Using immobile high-field strength elements (Nb, Ta, Zr, Hf) …
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What are the biogeochemical consequences of heuweltjie formation?
… proportions. It was determined through a simple mixing model that approximately 90% of the nutrients are derived from marine aerosol.
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Isotopic Fingerprinting of Shallow and Deep Groundwaters in Southwestern Ontario and its Applications to Abandoned Well Remediation
… in different bedrock formations. A Bayesian mixing model was applied to these data to develop a tool for identifying the source(s) of leaking fluids. The geochemical data also improve our understanding of groundwater origin and evolution. Shallow (~<350m) aquifers are recharged by recent …
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Exotic V[over-bar][subscript e] -->V[over-bar][subscript slash-e] oscillations in Double Chooz
… plus one-sterile, or (3 + 1), neutrino mixing model by implementing a least-squares fit to the simulated electron antineutrino reactor spectrum1 . By comparing the expected spectra from the null hypothesis and the (3 + 1) oscillation hypothesis at the Double Chooz near detector L = 200 …
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Combustion modeling for diesel engine control design
… at first with the development of a consistent mixing model for the interactive coupling (two-way-coupling) of a CFD code and a multi-zone code based on multiple zero-dimensional reactors. The interactive coupling allows for a computationally efficient modeling of HCCI or PCCI combustion, …
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Compressible Flow Analysis of Thrust Augmenting Ejectors
… augmenting characteristics of jet ejectors. The mixing process in ejectors can be analyzed using either the control volume approach, or detailed models based on the Navier -Stokes Equations and the theory of turbulent jets. The control volume approach uses integrated forms of the conservation …
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The effects of ocean eddies on tropical cyclones
… the numerical Price–Weller–Pinkel (PWP) vertical mixing model has previously been used to simulate and study the cold wakes of Atlantic hurricanes. The model has not been used in comparison with observations of typhoons in the Western Pacific Ocean. In 2010 several typhoons were studied during the …
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Eastern Truckee Meadows Groundwater Interactions with the Truckee River
… streambed to simulated groundwater flux from a mixing model, applying a stream discharge differencing method to compute a surface water balance and calculate groundwater accretion, comparing river stage with groundwater elevation to identify gradients, creating potentiometric maps to help …
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Multi-tracer Study for Groundwater Dating in Southern Oman
… and SF6 data ranged from 20 to 50 years. In a mixing model with two water masses, 14C and CFC-11 data were combined. On average, the contributions of the modern component and a 2000 to 19 000 years old component were found to be almost equal. Combining those findings with prospective 39Ar …
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Implications of geological carbon sequestration on shallow freshwater aquifers geochemistry
… and applying a simple freshwater-brine mixing model. The impact of CO2 leakage on carbonate aquifers was addressed by conducting a series of pressurized experiments. In these experiments, natural carbonate rocks of different compositions were reacted in water under high partial-pressures …
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The effects of ocean eddies on tropical cyclones
… the numerical Price-Weller-Pinkel (PWP) vertical mixing model has previously been used to simulate and study the cold wakes of Atlantic hurricanes. The model has not been used in comparison with observations of typhoons in the Western Pacific Ocean. In 2010 several typhoons were studied during the …
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On the finite-difference modelling of electromagnetic problems in structured lattices
… The results are compared with theoretical mixing models with a conclusion that none of them agrees with the numerical results in the whole range of volume fraction. Therefore, a new empirical mixing model is created based on the numerical results. Polarisation transformation properties of …
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Carbon Cycling Dynamics Inferred from Carbon Isotope Sourcing in a Mid-Latitude Karst-Influenced River
… were collected weekly and input into the mixing model IsoSource to delineate seasonal carbon sourcing along two nested basins in the upper Green River System, Kentucky. In the more siliciclastic upstream catchment, dissolved inorganic carbon (DIC) was primarily derived from soil …
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Old and subsurface water contributions to storm runoff generation in flat, fractured, clayey terrain.
… parameters were utilized in a two-component mixing model or the trial-error separating method developed in this study to determine relative contributions of old and new water, or subsurface and surface water during individual storm events. The magnitude of these contributions were compared to …
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Characterizing Provenance of the Late Wisconsinan Rainy Lobe Using Fine-Fraction Geochemistry and Detrital Zircon Geochronology
… to the Independence till in the NE. Two models have been proposed to explain the lithological differences (particularly carbonate) in Rainy Lobe tills. Goldstein (1989) postulated that the downglacier increase in carbonate in the Hewitt till was the result of progressive incorporation, by …
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On the ability of rocks to conduct heat in the lithosphere
This work focuses on creating a model for the conductive thermal transport properties of rocks using measured thermal diffusivity (D) with the Laser Flash Analysis (LFA) method, which eliminates common errors associated with physical contacts and spurious ballistic radiative transfer. Using a suite …
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