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 105 for “"density profiles"”.
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Laser Interferometer Measurements of Particle Density Profiles in Electric Shock Tubes
Made available in DSpace on 2014-12-08T22:24:16Z (GMT). No. of bitstreams: 1 6801760.pdf: 2209323 bytes, checksum: fa147d95ba67769ec7ddba164295ea96 (MD5) Previous issue date: 1967
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Density profiles of plasmas confined by the field of a Levitating Dipole Magnet
… 60 GHz) has been constructed to measure the density profiles of plasmas confined within the Levitated Dipole Experiment (LDX). LDX is the first and only experiment built to study plasmas confined by the field of a levitating, dipole magnet in a geometry that exploits plasma compressibility to …
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A Method of Determination of Ionospheric Electron Density Profiles From Faraday Rotation of Satellite Borne Radio Signals
Made available in DSpace on 2014-12-04T21:03:33Z (GMT). No. of bitstreams: 1 6303252.pdf: 1902022 bytes, checksum: 50340d9815e893d53f4d069f13c91861 (MD5) Previous issue date: 1962
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Effects of RF power on SOL density profiles and RF coupling on the Alcator C-Mod tokamak
… been used to measure the scrape-off-layer (SOL) density profiles under a wide range of plasma parameters in order to study plasma-antenna coupling and non-linear RF-SOL interactions on Alcator C-Mod. After validating the reflectometer density profiles with other density profile diagnostics in …
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A forward model for ionospheric soundings and its use with incoherent scatter radar data to obtain ionospheric plasma density profiles
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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A forward model for ionospheric soundings and its use with incoherent scatter radar data to obtain ionospheric plasma density profiles
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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An inverse method for obtaining the attenuation profile and small variations in the sound speed and density profiles of the ocean bottom
… speed, the compressional wave attenuation and density as a function of depth. An inverse method based on a perturbation technique is presented in this thesis for the determination of these parameters. A monochromatic source experiment is proposed because of the desirability of such an …
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Variations Of E-Region Total Electron Content And Electron Density Profiles Over High Latitudes During Winter Solstice 2007 Using Radio Occultation Measurements
… of total electron content (TEC) and the electron density within the E-region of the ionosphere, which extends from 80-150 km above the surface of the Earth, using radio occultation measurements obtained by COSMIC satellites and using Ionospheric Data Assimilation Four-Dimensional algorithm (IDA4D) …
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An inverse method for obtaining the attenuation profile and small variations in the sound speed and density profiles of the ocean bottom
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1985.
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The effects of inelastic self-interacting dark matter on galactic halo properties v/
… of two-state inelastic dark matter on the density profiles, velocity dispersions, pseudo-phase-space density profiles, orbital anisotropy parameter profiles, and principal axis ratios of galactic halos are examined. We find that inelastic self-interacting dark matter halos differ from both …
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Characterization of low-frequency density fluctuations in dipole-confined laboratory plasmas
Low-frequency fluctuations of plasma density, floating potential, ion saturation current, visible light intensity, and edge magnetic field are routinely observed in the Levitated Dipole Experiment (LDX). For the purposes of this thesis, we define low-frequency as W << Wbe where Wbe is the electron …
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Propagation of molecular outflows into inhomogeneous media
Molecular clouds have inhomogeneous density profiles and have been observed to be `clumpy' in nature, containing dense cores, rarefied filaments and cocoons. Energetic mass-ejection phenomena created during the gravitational collapse of dense cores are thought to be responsible for the molecular …
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Mechanism of C -Cadherin Binding: Multiple Adhesive Alignments and a Multi-Stage Unbinding Trajectory
… reflectivity, we measure preliminary electron density profiles of the C-cadherin layers and their supporting lipids, normal to the air-water interface. These electron density profiles are used to estimate the dimensions of the cadherin and the lipid monolayers. The thickness of the lipid …
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Transport of elliptic intense charged -particle beams
… small for all beams with arbitrary beam density profiles (including hollow density profiles) as well as for arbitrary small apertures (including beams with large aspect ratios). However, the main unstable region for the envelope evolution with image-charge effects, which occurs for 90: < …
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Fundamental analysis of the tomographic imaging system for reconstructing ionospheric distributions
… of two-dimensional imaging of electron density profiles. Traditional methods have, thus far, been capable of only one-dimensional imaging. Tomographic reconstructions are possible from existing one-dimensional data and can be enhanced by knowledge gained through traditional imaging …
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Temperature and Spatial Hole Burning Effects in Semiconductor Lasers and Integrated Optical Devices
… distributed-feedback lasers. The photon density profiles are calculated and compared with the carrier density profiles extracted from spontaneous emission measurements. The facet reflection coatings have a large impact on the spatial hole burning in laser diodes. Next, a longitudinal …
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Lidar and Modeling Studies of the Mesospheric Iron and Sodium Layers
… meteor radar data, and average Fe and Na density profiles. The total meteoric influx is derived from our data and argued to be a lower limit on the actual meteoric influx.
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Modeling and analysis of the forced-flow thermal gradient chemical vapor infiltration process for fabrication of the ceramic matrix composites
… temperature and vapor pressure variations on the density profiles of the composite preform were studied based on this FEM FCVI model. It was found that the advantages of the commonly used ambient—pressure FCVI process (APFCVI) are likely to be limited by the equipment and the accumulation of …
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Modeling and Simulation of Molecular Couette Flows and Related Flows
… chunk-based collocation methods. The velocity profiles of gaseous Couette flows and related flows with a wide range of Knudsen number and the Maxwell boundary condition of various accommodation ratios are obtained. Moreover, the order of convergence of the numerical methods is also discussed …
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Investigating bursty star formation and interstellar medium conditions in low-mass galaxies
… in low-mass galaxies show a flat central density distribution, contradicting the pure dark matter simulations, which predict a central cusp. However, simulations in small galaxies show that flat density profiles can be naturally produced through central starbursts. Bursty star formation …
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