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 1090 for “"Size distribution"”.
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Raindrop size distribution
… and study the impact of changes in raindrop size distributions (DSD) on the fixed terrestrial microwave links as a result of an increase in the incidence of heavy rain in the United Kingdom over this decade. Also to introduce an increasing trend in rain rates associated with outage. The daily …
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Essays on the Size Distribution of Cities
… of three essays that analyze the spatial distribution of people and economic activities from three distinct perspectives.Chapter 1: Explaining the Size Distribution of Cities: X-treme Economies. The empirical regularity known as Zipf's law or the rank-size rule has motivated development of …
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Quantifying the Size Distribution of Rivers Across Spatial Scales
… tested across spatial scales. We measured river size in four nested basins within the Mississippi River Basin using a combination of remote sensing and field surveying to determine the statistical size distribution of rivers from continental to headwater scales. We found that the relative …
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Instrument for the measurement of the droplet size distribution in clouds
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Meteorology, 1952.
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Learning-based Correlation Analysis Between Laser Speckle and Surface Size Distribution
… industry, where quantifying the particle size distribution (PSD) is of particular interest. A non-invasive and real-time monitoring probe in the drying process is required, but there is no suitable candidate for this purpose. In this thesis, we develop a theoretical relationship from the …
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Patterns of habitat, microhabitat, and body size distribution in a lizard assemblage.
I investigated habitat use within an assemblage of four phrynosomatine lizards (Sceloporus graciosus, S. undulatus, Urosaurus ornatus, and Uta stansburiana) that are commonly syntopic in the pinyon-juniper woodland habitat on the elevated mesas of western Colorado. Lizard populations were censused …
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Raindrop Size Distribution Retrieval And Evaluation Using An S-band Radar Profiler
… assumed rain parameters, of which the raindrop size distribution (DSD) is the fundamental quantity used to describe the characteristics of rain. Also, profiler observations during stratiform rain are analyzed to retrieve the corresponding rain DSD’s. In particular, a gamma distribution model is …
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The Role of Pore Size Distribution in Competitive Adsorption on Activated Carbon
… adsorbent must have a wide range of micropore sizes, including pores of similar size to the target compound.
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The Impacts of Particle Size Distribution and Electrode Structuring on NMC Cathode Performance
… battery production are not uniform in shape and size distribution. This heterogeneity results in heterogeneous electrode structures, leading to uneven reactions across the battery electrodes. Moreover, mass transport limitations at high charging rates can further exacerbate the reaction …
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Novel continuous crystallization configurations for improved yield, purity and controlled crystal size distribution
… impurities were investigated and the impurity distribution model helped estimate the highest product purity achievable of the process. The results showed that optimization in stage number and stage temperatures could improve the yield close to the batch yield at equilibrium. In the third …
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Analysis of particulate matter concentration and size distribution in heavy-duty vehicle exhaust emissions
… and quick means for determining the particle size distribution parameters (the mass median aerodynamic diameters and geometric standard deviations) of sample data for the multi-modal distribution.;The particle size distribution of the compressed natural gas buses tested was characterized by a …
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RELAMPAGO-CACTI drop size distribution observations and the implications for cloud and hydrologic studies
Comparisons of drop size distributions (DSD) properties and rainfall modes among three deep convective regions (the U.S. Southern Great Plains, in Córdoba Province in subtropical South America, and Manacapuru in central Amazonia) where heavy rain-producing systems contribute the majority of …
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The effect of particle size distribution on the rheology of ultrafine coal-water slurries
… techniques which require the grinding of coal to sizes below 10 microns. Coal in this size range has inherent material handling problems, most of which can be eliminated by the utilization of this ultrafine coal in a slurry form. Ultrafine coal-water slurries, prepared from an Eastern bituminous …
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Environmental influences on particle size distribution of Dreissena polymorpha environmental DNA in a Texas reservoir
… results. For example, research of eDNA particle size distribution (PSD), which describes the abundance and range of sizes of eDNA-bearing particles in the environment, can guide filter size selection for optimal capture of target eDNA. Previous PSD research has mainly targeted fish and has tended …
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The effects of concentration, interaction, size distribution and shape anisotropy on rheology of colloidal mixtures
… concentration, strength of attraction, particle size distribution, and particle shape, which have effects on dynamic arrest transitions, jamming conditions and steady flow properties of dense suspensions. A special attention is paid to changes in properties at volume fractions exceeding the …
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Pore size distribution and methane equilibrium conditions at Walker Ridge Block 313, northern Gulf of Mexico
In-situ pressure, temperature, salinity and pore size may allow coexistence of three methane phases: liquid (L), gas (G), hydrate (H) in marine gas hydrate systems. A discrete zone of three-phase equilibrium may occur near the base of the gas hydrate stability zone (GHSZ) in sediments with salinity …
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Investigating the effect of perforation diameter and carbon dioxide bubble size distribution on heavy oil recovery
… effect of perforation diameter and CO2 bubble size distribution on the viscosity and recovery of heavy oil during Enhanced Oil Recovery process. To conduct the investigation, an experimental rig was constructed to simulate the flow of CO2 in heavy oil. The oil viscosity, CO2 bubble sizes were …
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