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 46 for “"Mixing models"”.
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Dynamically induced uncertainty in stratified turbulent mixing models
… processes and the way in which they enhance mixing in order to form an accurate picture of the vertical transport of heat, nutrients and anthropogenic pollutants. This applies to parameterisation schemes in coarsely resolved large-scale numerical simulations, as well as the processing and …
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Application of one-dimensional mixing models to the winter-time Mediterranean.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1970.
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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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Measurement of electromagnetic signal velocities in saturated fine-grained soils
… define water content ranges over which different mixing models are required to relate velocity and water content. This led to initial development of mixing models specifically for the saturated state to allow more accurate use of laboratory velocity measurements in determining fine-grained soil …
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A thermodynamic simulation model for storage of corn
… diffusivities were determined using five mixing models(parallel, series, equivalent-resistor, modified Maxwell, and geometric mean). Five phase conversion factors(0.0, 0.25, 0.50, 0.75, and 1.0) were utilized to evaluate the five mixing models. Three laboratory storage bins, and eight …
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Understanding Soil Carbon Signatures from Hyperspectral Reflectance Data using Spectral Unmixing
… it is feasible to leverage spectral linear mixing models to decompose soil hyperspectral reflectance data into interpretable soil component spectral signatures and abundances. The results demonstrate that the proposed spectral linear mixing model can predict soil organic carbon (SOC) …
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The Role of Avifauna in Paleodiet Reconstruction : An Arctic Case Study
… differs from tissue spacings in mammals. Linear mixing models were then used to estimate diet based on new tissue spacing data and isotope data from archaeological bird bone collagen. These results were compared to previous studies of Arctic paleodiet. Zooarchaeological analysis of the avifaunal …
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Petrogenetic study of the Porcupine Lake mafic intrusive complex, Trinity terrane, northern California
… (Nb, Ta ≅ 0.1 NMORB). Trace element mixing models indicate gabbro and mafic dikes are derived from a residual mantle source with enrichment by small amounts of slab-derived aqueous fluids and pelagic sediments. Mafic dikes are also enriched by fertile MORB (asthenospheric) mantle. …
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A radiocarbon method and multi-tracer approach to quantifying groundwater discharge to coastal waters
… acquired from the carbonate aquifer rock. Mixing models were used to evaluate the inputs from potential sources of DIC-A'4C to each estuary, including seawater, springs, fresh water stream inputs, and salt marsh respiration DIC additions. These calculations showed that artesian discharge …
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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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Determining the Trophic Role of Red Snapper (Lutjanus campechanus) in Mississippi State Waters Using Stomach Content and Stable Isotope Analysis
… and trophic position which can improve food web models and inform fisheries management decisions. Particulate organic matter (POM), the presumed base of the food web, red snapper muscle tissue, and red snapper stomach contents were collected from 25 sites in 2016 and 2017 for stable isotope …
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Solvent-free additive manufacturing of electrodes for Li-ion batteries
… of the electrode particles during the mixing process is the driving factor for the solvent-free additive manufactured batteries. The distribution of dry electrode materials was studied through experimental mixing studies, mixing models, and mixing simulations to better understand how …
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Summer wolf diet in northwestern Montana
… We used hierarchical Bayesian stable isotope mixing models to determine diet and scales of diet variation from δ13C and δ15N values of wolves and prey. We used bootstrapped scat data, and Markov Chain Monte Carlo simulation data from stable isotopes to estimate confidence intervals of …
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Summer wolf diet in northwestern Montana
… We used hierarchical Bayesian stable isotope mixing models to determine diet and scales of diet variation from δ13C and δ15N values of wolves and prey. We used bootstrapped scat data, and Markov Chain Monte Carlo simulation data from stable isotopes to estimate confidence intervals of …
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Characterization of Cooled Turbine Efficiency for Off-Design Performance Models
… on how they are represented in performance models. The challenge is especially present in “black-box” approaches, where only inlet and outlet conditions are known and engineers must decide whether to introduce cooling flows upstream (if performing useful work) or downstream (if not). This …
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The Box Ankle and Ocmulgee shear zones of central Georgia: a study of geochemical response to Southern Appalachian deformation events
… data on the effects of Pb loss versus U gain models, dissolution processes, and overgrowth binary mixing models from within selected mylonitized bulk rock chemistries. In the Ocmulgee fault, zircon overgrowth associated with deformation dominates U/Pb age discordancy. Isotopic re-equilibration …
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Well-log based determination of rock thermal conductivity in the North German Basin
… (2) evaluating and improving commonly applied mixing models which were used to estimate matrix and pore-filled rock thermal conductivities, and (3) developing new well-log based equations to predict thermal conductivity in boreholes without core control. Laboratory measurements are performed on …
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Fish scales as ecological indicators: empirical approaches to improve their practical application to fish ecology
… to dietary studies, their use in statistical mixing models requires accurate step-wise enrichment values between diet and consumer (i.e. discrimination factors). There is considerable uncertainty in the variability of discrimination factors between species and the influence of their diet. …
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MULTIDISCIPLINARY WORK TO DETERMINE HYDROLOGY OF ARID LAND SPRINGS AND HOW SPRING WATERS INFLUENCE WATER QUALITY AND ECOSYSTEM HEALTH FOR DESERT ENVIRONMENTS
… methods to determine flow paths, mixing scenarios, residence time and recharge mechanism for ground, surface and spring waters for the ZBS habitats. Continuous monitoring of physico-chemical parameters at the three ZBS habitats lead me to propose a water quality stability …
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A radiocarbon method and multi-tracer approach to quantifying groundwater discharge to coastal waters
… acquired from the carbonate aquifer rock. Mixing models were used to evaluate the inputs from potential sources of DIC-Δ14C to each estuary, including seawater, springs, fresh water stream inputs, and salt marsh respiration DIC additions. These calculations showed that artesian discharge …
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