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 757 for “"Ingestion."”.
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Water ingestion in jet engines.
… in a variety of inclement weather situations. Ingestion of airborne water has been found to cause problems for certain engine types, particularly during aircraft descent at low engine power settings. The effects of water ingestion under these engine operating conditions are not well understood. …
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Soil ingestion by elastomeric seals
… present work shows that three stages of particle ingestion precede seal erosion, and that seals designed to interfere with each stage exhibit substantially longer operational life. The three stages of failure preceding seal erosion are as follows. The first stage occurs when small soil particles …
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Turbulence ingestion noise of open rotors
… of the noise they generate. Noise due to the ingestion of distorted atmospheric turbulence, known as Unsteady Distortion Noise (UDN), is likely to be higher for open rotors than for conventional turbofan engines since the rotors are fully exposed to oncoming turbulence and lack ducting to …
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The Production and Ingestion of Antibodies in Milk
<p>Since biblical times man has depended upon the cow for nourishment. The cow’s contribution to human and animal welfare has been tremendous. These contributions may be increased by artificially producing antibodies in milk. In view of recent experiments the established theory that antibodies …
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The effect of dextrose ingestion on cardiovascular endurance
… <p>The data indicated that dextrose ingestion decreased exhaustion time on the treadmill. Subjects were able to exercise for a longer period of time after the intake of a sugar-free substance.</p> <p>It is concluded that the ingestion of dextrose, as used in this study, decreases …
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Aero-assisted orbital transfer vehicles utilizing atmosphere ingestion
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2001.
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Soil ingestion and lead concentration in wildlife species
Problems related to estimating soil ingestion by wildlife species from analysis of feces were examined. Soil ingestion was investigated as a means by which wildlife may be exposed to environmental contaminants, particularly Pb. Titanium (Ti) and acid-insoluble residue (AIR) tracer methods for …
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Mechanisms of hot gas ingestion in turbine disk cavities
In a gas turbine engine, hot gas ingestion occurs when gas from the mainstream flow path migrates into the cavities between stator and rotor disks. In order to mitigate the damage caused by these high-temperature gases, the cavities are purged with colder air from the compressor, and rim seals are …
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Analysis of civil aircraft propulsors with boundary layer ingestion
This thesis describes (i) guidelines for propulsor sizing, and (ii) strategies for fan turbomachinery conceptual design, for a boundary layer ingesting (BLI) propulsion system for advanced civil transport aircraft. For the former, configuration performance analysis shows BLI yields a reduction in …
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The Ingestion of Garlic and its Effect on Cardiovascular Endurance
… experimental group.</p> <p>It is concluded that ingestion of garlic oil, as used in this study, increases cardiovascular endurance.</p>
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Regulation of postprandial protein metabolism after food ingestion and exercise
… protein synthesis and breakdown rates. Protein ingestion has been shown to stimulate protein synthesis rates and thus is an important variable within the net protein balance equation dictating a positive balance. However, postprandial protein metabolism has been almost exclusively characterized …
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Inhomogeneous, Anisotropic Turbulence Ingestion Noise in Two Open Rotor Configurations
… in the far field noise. For the cylinder wake ingestion case, on-blade measurements of the flow field show that the wake is drawn to the center of the rotor disk with increasing thrust. This is particularly noticeable if the wake does not strike the center of the rotor disk. The effects of this …
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Effects of lead ingestion on the immune function in quail
Wild birds can be exposed to high concentrations of lead caused by spent lead shot and industrial waste. The immunosuppressive effects of lead have been demonstrated in laboratory mammals, but little research has been conducted in birds. Because immunocompetence is important for survival, the …
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A numerical investigation of s-duct flows with boundary-layer ingestion
… inlet with significant boundary-layer ingestion (BLI). In conjunction with a NASA-sponsored research grant, the aim is to further accumulate knowledge and insight on the effectiveness of flow control devices in reducing circumferential distortion. Using Computational Fluid Dynamics …
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Biological effects of the ingestion of the toxic plant, Cycas circinalis
Thesis (M.S.)--Michigan State University. Dept. of Foods and Nutrition, 1964
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Ameliorative effects of phytochemical ingestion on viral infection in honey bees
… However, the exact mechanism by which caffeine ingestion improves survivorship remains uncertain, as a comparison of viral titers between inoculated and uninoculated caffeine-fed bees revealed no significant difference between infection groupings. My findings indicate that caffeine has potential …
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Metabolic derangement in response to ingestion of imbalanced amino acid mixtures
… indispensable amino acids in response to ingestion of· imbalanced amino acid mixtures. Basal, histidine-imbalanced and corrected diets were prepare. Histidine-U<sup>14</sup>C and Threonine-U<sup>14</sup>C were used in tracer quantities to study the metabolic behavior of the respective …
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Effects of Fluid Properties on the Dynamics of Mosquitoes' Ingestion Pumps
… dynamics, we inform computational models of the ingestion pumps that will help us gain insight into how the evolution of blood feeding.
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Effects of Sand Ingestion on the Film-Cooling of Turbine Blades
… metal, high mechanical stresses, and particulate ingestion such as sand. To maintain a low and uniform metal temperature to extend the life of a turbine component, a complex scheme of internal convective cooling and external film-cooling is required. Gas turbine engines operated in sandy or dusty …
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