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 17 of 17 for “"Effective Density"”.
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Effective Density Visualization of Multiple Overlapping Axis-Aligned Objects
… axis-aligned objects, to devise efficient and effective data visualization methods that inform whether, where and how much they overlap. Currently, such visualizations rely on inefficient implementations to determine the size of the overlap of objects. We address this problem by exploiting …
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Effects of anisotropy of the superconducting energy gap
… a factorable BCSlike model for the effective electron-electron matrix element Vp p • = [1 + a. (p) ] V [1 +a(p')] is used. The IN\ W\ effects of anisotropy upon the temperature dependence of the gap parameter 6p ' the critical field, and the specific heat near the critical …
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Evaluation of triple-frequency radar retrieval of snowfall properties using coincident airborne in-situ observations during olympex
… observations suggest that particle bulk density and characteristic size can be retrieved from the DFR plane. This is the first study to evaluate the retrieval of particle shape, bulk density and characteristic size using airborne triple-frequency radar observations coincident with …
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Electron spin-lattice relaxation in YB3+ - doped silicate glass
… anomaly suggests the need to modify the Debye density of states. Fractal models have been suggested for the thermal properties of glasses and for similarly anomalous spin relaxation behavior in proteins. An alternate model is proposed here that is supported by other measurements of low …
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Electron spin-lattice relaxation in ytterbium ion-doped silicate glass
… anomaly suggests the need to modify the Debye density of states. Fractal models have been suggested for the thermal properties of glasses and for similarly anomalous spin relaxation behavior in proteins. An alternate model is proposed here that is supported by other measurements of low …
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Ultrasound : an alternative solution for removing tattoos
… therefore assumed that tattooed cells adopt an "effective density" analogous to the way fat cells develop a lower density. Using this change in mechanical property, the hypothesis is that focused, high frequency ultrasound can target tattooed cells. These cells may be selectively disrupted based …
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Particle Charging and Classification: The Mass Mobility Aerosol Spectrometer (M2AS)
… transmitted particle mass. This method proves effective for a wide range of aerosols (mass range of 0.01 fg to 100 fg) and achieves accuracy within ±20% by fitting experimental data to power law functions of mobility diameter for both effective density and average charge. This experimental …
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Viscosity modeling of solvent-water-heavy oil/bitumen systems at high pressures and elevated temperatures
… been evaluated and compared. By adopting the effective density concept, the volume-based power law, weight-based power law, and weight-based Cragoe’s mixing rules reproduce the experimentally measured viscosity from 4.3-15000.0 mPaꞏs within the pressure and temperature range from 1.1 to 10.9 …
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Quantification of Phase Behaviour and Physical Properties of Solvents-Heavy Oil/Bitumen-Water Systems at High Pressures and Elevated Temperatures
… new methods have been proposed to predict the density/swelling factor for solvents-heavy oil/bitumen/water mixtures, i.e., one is a new volume translation (VT) strategy for PR-EOS, while the other is the ideal mixing rule with effective density (IME) calculated using a newly developed …
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Determining the role of density-dependent effects in disease induced population impacts
… transmission at low host densities to be effective. Density-dependent contact rates are generally assumed to be the mechanism driving these decline patterns. However, other density-dependent processes that influence transmission probability could also influence mortality in a …
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Reduced model for particle laden flow
… mixture is modeled as a single fluid with effective density and viscosity, depending on the concentration of the particles. Since the flow is slow and the fluid layer is very thin, inertial effects are ignored and a lubrication approximation is applied to simplify the analysis. It is …
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Charge and momentum transfer processes for gas-phase nanoparticles.
… (Ω) were inferred from the mobility spectra. An effective gas molecule diameter of 0.3 nm was accounted for in these calculations. While calculating collision cross sections, a non unity momentum scattering coefficient (ξ = 1.36) was considered to account for diffuse collisions between gas …
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The Interaction Between the Substrate and Frost Layer Through Condensate Distribution
… parameters and substrate contact angle. The effective density of the condensate on hydrophobic substrates is found to be lower than that on hydrophilic substrates. The structure of the ice immediately after freezing is substrate dependent. High-speed imaging of the freezing process is used to …
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Dynamics of confined chemical gardens and implications for submarine methane hydrates
… grow with a self-organized dispersion mechanism. Effective diffusivities as high as 10−5 m2 s-1 are measured, an efficient transport four orders of magnitude larger than molecular diffusion in a liquid, ensuring widespread contact and exchange between fluids in the chemical garden structure and …
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Studies of modified pumice and titanomagnetite filtration media
… application in filtration systems where its low effective density and porous structure make it ideally suited for use as the upper layer of dual media filters. Particle size and surface charge are key parameters influencing the effectiveness of a given filtration medium. Finer medium particle …
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Two-phase Flow Modelling of Mud Flocs Sedimentation in Coastal Waters
… flocs with mud flocs properties (size, shape and effective density) empirically based on various flocculation models for dilute suspension. A few investigations have also been reported on the cohesive sediment transport processes with high concentration, but the interactions of fluid and …
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Advanced Suspended Sediment Sampling and Simulation of Sediment Pulses to Better Predict Fluvial Geomorphic Change in River Networks
… measurements to improve the estimation of effective density and particle size distribution with the help of a physical sample. Simulation results from the river network model show that bed response is primarily influenced by the sediment-pulse grain size and distribution. Intermediate …