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 63 for “"Overpressure"”.
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Tectonic overpressure in Franciscan terrains.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1969.
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Blast overpressure relief using air vacated buffer medium
… a strategy is investigated for relief of blast overpressure resulting from explosions in air. The strategy is based on incorporating a layer of low pressure-low density air in between the blast wave and the target structure. Simulations of blast waves interacting with this air-vacated layer …
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OVERPRESSURE AND COMPACTION IN THE LOWER KUTAI BASIN, INDONESIA
… workers agreed that the principal mechanism of overpressure generation is disequilibrium compaction, with sand–mudrock pressure discrepancies being present above the transition zone into hard overpressure as a result of lateral reservoir drainage. The pressure data, wireline logs and other data …
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Attributes of Astrocyte Response to Mechano-Stimulation by High-Rate Overpressure
… The working hypothesis was that high-rate overpressure exposure would cause metabolic aberrations, cell junction changes, and adhesion signal transduction activation, all of which would contribute to astrocyte response and reactivity. Astrocyte cultures were exposed to a 20 psi high-rate …
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The Biomechanical Response of the Eye, Face, and Orbit to Primary Blast Overpressure
… of life. Although it is suggested primary blast overpressure (i.e., the shock wave) can cause severe eye injuries, there remains few empirical data in the literature that confirms this. Adding to this, there are currently no testing standards to assess the effectiveness of personal protective …
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An approach for upscaling the flow effects of multiple deep-water genetic units
… of the most significant and necessary issues is overpressure prediction. Basin modelling to construct full scale models is an effective way to find out overpressure distribution in many conditions. However, with current modelling and other methods, it is difficult to obtain data about highly …
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Investigation of subsonic boundary layer effects on supersonic-type airfoil sections
… Reynolds Numbers and causes a decrease in the overpressure region. This, coupled with the fact that the overpressure region increases more with Mach Number than predicted by the theory, could lead to erroneous calculations of the drag.
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Fluid Budget of Metasedimentary Rocks from a Tertiary Accretionary Prism and Connections to Seismicity, Olympic Peninsula, Northwest Washington State
… increases at ~10 km depth, creating fluid overpressure needed to trigger seismicity.</p> <p>I calculated that on the Olympic Peninsula 1 km<sup>3</sup> of 50% sandstone and 50% mudrock loses ~10<sup>5</sup> kg H<sub>2</sub>O/yr during burial from 6–14 km depth, comparable to the values …
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Compression behavior of smectitic vs. illitic mudrocks
Overpressure or fluid pressure in excess of hydrostatic pressure has been observed globally in many deep water sedimentary basins. One of the possible mechanisms for overpressure is the smectite-to-illite (S-I) transformation. During the transformation, the basal spacing of the smectite layer …
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Smectite to illite transformation of Gulf of Mexico -Eugene Island (GoM-EI) mudrock
… pressure do not apply to the basin where overpressure is often observed. Compaction disequilibrium and clay mineral diagenesis are recognized as potential contributors to overpressure generation. My research aims to look at the relationship between smectite-to-illite transformation and …
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Injury Biomechanics of the Human Eye During Blunt and Blast Loading
… eye injuries caused by blunt impacts and blast overpressure. This research represents part of an ongoing investigation to accurately quantify and predict eye injuries and injury mechanisms for various loading schemes. It has been shown that blunt trauma can cause severe eye injuries but it …
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Theoretical study of MBE growth of indium gallium arsenide semiconductor compound on gallium arsenide substrate
… with the experimental data [1] for various As overpressure. For a constant As overpressure, In incorporation decreases with increasing temperature. For a constant temperature, In incorporation increases with increasing As overpressure. The In desorption versus time results from experiments and …
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An Investigation of Blast Waves Generated by Constant Velocity Flames
… as the flame velocity decreased to Mach 4.0 the overpressure increased. For flame velocities below Mach 4.0 the overpressure decreased, and approach the acoustic solution originally developed by Taylor. In the far field the overpressure curves for supersonic flame velocities coalesced to a common …
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HYDROTHERMAL FLUID TRANSPORT PATHWAYS ALONG FRACTURES AND VEINS AT BROTHERS VOLCANO, SOUTHERN KERMADEC ARC
… extension, episodic caldera collapse, and fluid overpressure all have the potential to create brittle features. Current studies focus on the formation of fractures and veins by these methods, but do not focus on the preferred movement of hydrothermal fluids through brittle features, nor which …
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The Blast Waves From Unconfined Axisymmetric Vapour-Cloud Explosions
… in determining the blast parameters, i.e. peak overpressure and impluse, using the numerical calculations for various cloud geometries and flame velocities. A general acoustic monopole source theory was also used in determining the peak overpressure and impulse produced by the low velocity …
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Structural diagenesis of bed-parallel and bed-normal fractures, Cretaceous Crato Formation carbonate rocks, NE Brazil
… veins. Bed-parallel fractures generated by fluid overpressure may be present in well-layered regions of pre-salt source rocks assuming petroleum generation is significantly high or fluid overpressure occurred sufficiently early in the burial history of pre-salt source rocks. Bed-parallel fractures …
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Small scaled reactive materials combustion test facility
… projectiles directed into blast chambers where overpressure is measured to quantify output. Unfortunately, these existing facilities suffer many issues including high cost per test, which limits the ability to perform true parametric studies, as well as limited access in some cases for …
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Using optical techniques to measure aluminum burning in post-detonation explosive fireballs
… techniques–recovered residue analysis and overpressure measurements–is used to challenge typical interpretations of optical measurements of aluminized explosive fireballs. The effect of the aluminum particle location with respect to the explosive material was tested by using end-loaded …
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