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 241 for “"unconfined"”.
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Coupling between unconfined cylindrical explosive charges and rock
Includes bibliographical references.
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The Blast Waves From Unconfined Axisymmetric Vapour-Cloud Explosions
This dissertation presents a systematic study of the blast waves produced by axisymmetric detonation waves and constant velocity as well as accelerating deflagration waves propagating through homogeneous axisymmetric clouds whose energy density approximate that of a typical hydrocarbon-air mixture. …
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Mixing and atomization by impingement of unconfined liquid jets
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Chemical Engineering, 1949.
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Optical properties of confined and unconfined excitons in semiconductor quantum heterostructures
… and optical properties of confined and unconfined excitons in semiconductor quantum heterostructures are investigated. We use multiband effective mass theory to solve the subband structure in which valence band mixing is properly taking into account. With the aid of supercomputer and …
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Flow characteristics of a transverse water jet into an unconfined water channel
… of the velocity ratio in a crossflow in an unconfined situation may aid to understand the design estimation of such flow field. The jet trajectories provide the information of penetration depths that can be used to figure out the proper mixing process of such situations.
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Experimental investigation of unconfined bluff body stabilised flames with vapourised kerosene fuels
… blow-off limits and turbulent flame structure of unconfined, pre-vapourised liquid fuels stabilised on a bluff body burner were investigated at two conditions: far from blow-off (φ/φbo = 1.20) and close to blow-off (φ/φbo = 1.01). Four different fuels were considered, two of which comprised of a …
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CBR and unconfined compressive strength tests on a lime stabilized clay soil
… repeated using the miniature apparatus for the unconfined compression test. Six samples were prepared for each test condition. Two of these were tested as molded, two after damp curing (four days 67ºF), and two after oven curing (two days 120ºF). The results of this study indicated the …
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Poroviscoelastic Modeling of the Mechanical and Fluid Response of Liver Tissue in Unconfined Compression
… level of liver multi-scale testing by conducting unconfined compression tests on unperfused and perfused tissue blocks. This data was then used in model development, leading to finite element models capable of predicting mechanical and fluid response in tissue specimens. This strategy serves as …
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Experimental Compressive Behavior and Numerical Modeling of Unconfined and Confined Ultra-High Performance Concrete
… material level through experimental testing of unconfined and confined cylinders, and at the structural level through numerical modeling.This study consists of three main parts. First, a series of uniaxial compression tests was conducted on more than 130 unconfined and confined UHPC cylinders …
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Unconfined compressive strength prediction using drilling parameters and analyzing feature importance through principal components analysis
… operations in the oil and gas industry. The Unconfined Compressive Strength (UCS) is the maximum compressive force applied to cylindrical rock samples without breaking under unconfined conditions. Unconfined Compressive Strength (UCS) is one of the key criteria to ensure safe, efficient, and …
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Distribution and Transport of Nitrate in an Unconfined Alluvial Aquifer, Carson Valley, Douglas County, Nevada, 2009.
… County, Nevada rely on groundwater from an unconfined alluvial aquifer for drinking water and agricultural irrigation (although the Carson River is also used for irrigation). Since the 1970's, there has been a rapid increase in population in several parts of the valley with little economic …
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Effect of freezing and thawing on unconfined compressive strength of clay-lime mixture with and without air entraining agent
The main objective of this study was twofold: 1. To determine the effect of freezing and thawing on the loss in strength of lime-soil mixture. 2. To investigate the effect of the addition of an air entraining agent on the freezing and thawing durability of lime-soil mixtures. For the first part, …
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Hydrogeologic Model of a Leachate Plume in an Unconfined Coastal Plain Aquifer and Chemical Transport Mechanisms of Metals and Dense Non-Aqueous Phase Liquids
<p>Groundwater contamination is of increasing environmental concern as many aquifers across the globe have experienced a decrease in water quality in recent time. The growth of the world's population over the last couple of decades has caused a dramatic increase in the rate of groundwater use. One …
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A comparison of short-circuited streaming potentials in Westerly granite from changes in the rock's volume, shape, saturation, and fracture under unconfined uniaxial compression
An experiment was designed to gain some insight into the phenomena of electrical charge in the uniaxially stressed environment of a sample of Westerly granite. Varying properties of size, shape, saturation, and stress rate of the Westerly granite, a tentative set of physical relationships were …
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Putting Place Back Into Displacement: Reevaluating Diaspora In the Contemporary Literature of Migration
… mixture requires only the measurement of unconfined compressive strength. This simple measurement may not be adequate to describe the behavior that results from differing field loading conditions. A series of consolidation tests and unconfined compression tests were conducted with special …
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Impact of Curing Time and Curing Stress On the Mechanical Behavior of Cement-Improved and Cement-Fiber-Improved Soft Soil
… mixture requires only the measurement of unconfined compressive strength. This simple measurement may not be adequate to describe the behavior that results from differing field loading conditions. A series of consolidation tests and unconfined compression tests were conducted with special …
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SPILL AND BURNING BEHAVIOR OF FLAMMABLE LIQUIDS
Unconfined liquid spill depths were measured for two liquid fuels and three non-flammable liquids atop a smooth concrete pad. Unconfined liquid spill thicknesses were found to be less than 0.1 cm in all fuels and liquids similar to fuels. Spill fires were conducted with volumes ranging from 0.2 ml …
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A Conceptual Model of Groundwater Flow at the Midway, Utah Fish Hatchery as Constrained by Geochemical, Physical Hydrogeological, and Geophysical Methods
… at Midway, Utah was closed when the shallow unconfined aquifer being used for fish culture by spring discharge was deemed to be contaminated by whirling disease. An alternative water source may exist in a confined aquifer below this contaminated unconfined aquifer. However, the complex …
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