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 348 for “"Blockage"”.
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Endwall blockage in axial compressors
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1996.
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Experimental Investigation of Micro-Channel Blockage Phenomena
An experimental investigation of blockage and a study of fluid and particle motion within micro-channels having a variety of cross-sectional geometries have been conducted over a wide range of flow conditions. A micro-channel can be blocked by particles in dilute particle-laden fluid, if they have …
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THE EFFECTS OF CURRENT BLOCKAGE ON OFFSHORE STRUCTURES
… an in-line steady current. Because of current blockage, the actual drag force experienced by such structures is over-predicted by the standard Morison equation and the present industry standard practice. A set of analytical models of current blockage is formulated based on the actuator disc …
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Propeller blade design thickness and blockage issues due to source-induced factors
Thesis (Nav.E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, February 2001.
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Structural Insights into Ion Selectivity and Calcium Blockage in Cyclic Nucleotide Gated Channels
Cyclic nucleotides-gated (CNG) channels play an essential role in the visual and olfactory sensory systems and are ubiquitously expressed in a variety of neuronal and non neuronal cells. Details of their underlying ion selectivity properties are still not fully understood and a matter of debate in …
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Effect of vortex core stagnation pressure on tip clearance flow blockage in turbomachines
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
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Using Augmented Reality For Studying Left Turn Maneuver At Un-signalized Intersection And Horizontal Visibility Blockage
… intersection, and horizontal visibility blockage when following a light truck vehicle. The results from this work supported the validity of our AR systems to be used as a surrogate to the field-testing for transportation research.
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Why do mosquitoes use two modes of drinking? An analytical test of a blockage clearing hypothesis
Mosquitoes drink using a pair of in-line muscular pumps in the head that draw liquid food through a long drinking channel termed as proboscis. Experimental investigations of mosquito drinking using synchrotron x-ray indicate two modes of drinking, a predominantly occurring continuous mode in which …
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Investigation of Pulse Detonation Engines: the Effect of Variable Blockage Ratio on the Deflagration to Detonation Transition
… spaced obstacles with a specified constant blockage ratio to generate turbulence and pressure fluctuations. There have been few efforts to study effects of varying blockage ratio as a function of axial distance. This research analyzes the effect of variable blockage ratio on …
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Investigation of pressure-tube and calandria-tube deformation following a single channel blockage event in ACR-700
… for ACR-700 is the complete coolant flow blockage of a single PT. The flow is not monitored within each individual PT, thus during the early stages of this accident the reactor remains at full power and full pressure, resulting in rapid coolant boil-off and fuel overheating. Melting of the …
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A method for surgical correction of recurrent urethral blockage in the male cat utilizing a pelvic symphysiotomy approach
Thesis (M.S.)--Michigan State University. Dept. of Surgery and Medicine, 1968
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Water blockage effect on desiccating tight gas reservoirs with similar properties to the Sarah formation reservoir of Saudi Arabia
Includes bibliographical references (pages 156-160).
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Protective Mechanism of Epigallocatechin-3-gallate against Helicobacter pylori- induced Gastric Epithelial Cytotoxicity via Blockage of TLR-4 Signaling
… EGCG completely blocked its glycosylation. The blockage of TLR-4 activation by EGCG resulted in inactivation of ERK1/2 and NF-kB as downstream molecules of TLR-4 signaling induced by H. pylori. This disturbance of H. pylori-induced host cell signaling by EGCG attenuated the synthesis of …
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The effects of sperm dose, semen quality, and retrograde sperm blockage on accessory sperm number and embryo quality in the artificially inseminated bovine
… the effects of sperm dose and retrograde sperm blockage on mean number accessory sperm/ova. 2. Evaluate the relationship between mean number accessory sperm/ova and fertilization status/embryo quality. 3. Determine if mean number accessory sperm/ova or embryo quality are affected by semen …
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Scaling Effects on the Hydrodynamics and Performance of Current Turbines
… objective is to characterize the effects of the blockage ratio, Reynolds number, and Froude number on turbine performance and flow dynamics with the goals of better understanding the relative influence of these parameters and improving the quality of laboratory-scale testing. The second objective …
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Numerical and experimental modeling of atherosclerosis related to MRI
… with measured velocities downstream of the blockage. This thesis makes a first step towards obtaining results that can be applied in investigations of atherosclerosis employing MRI. The fluid dynamics of arterial blood flow, the medical procedure of diagnosing and treating atherosclerotic …
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Experimental Investigation of Liquid and Particle -Laden Flows in Microtubes
Since flow blockages are the ultimate form of increased flow resistance, the research emphasis is focused on the mechanisms that lead to blockage. Different blockage mechanisms are observed in different regimes defined by the ratio of particle diameter to tube diameter. For example, for 0.33 D < dp …
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Microscopic study of salt precipitation dynamics during the injection process of CO2 storage in saline aquifers
… processes: nucleation, growth, migration, and blockage. Nucleation leads to two crystal types: in high-saturation regions (e.g., brine pool or bridge), large bulk crystals form and clog pores quickly, while in low-saturation regions (e.g., brine film), porous aggregated crystals with larger …
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Effects of Sand Ingestion on the Cooling of Turbine Blade Outer Air Seals
… of reducing sand size and thereby reducing blockage due to sand ingestion. The second part analyzed the cooling performance of actual turbine blade outer air seals injected with sand. Results from these studies showed areas of impingement that promote particle fragmentation are advantageous …
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