Thesis (Ph. D.)--University of Washington, 2007. / Vita. Includes bibliographical references (leaves 182-195).

Thesis (M. Sc.)--University of Canterbury, 2004. / Typescript (photocopy). Includes transparent overlays. Includes bibliographical references (leaves 147-152). Also available via the World Wide Web.

Thesis (M.S.)--Oregon State University, 2004. / Typescript (photocopy). Includes bibliographical references (leaves 31-32). Also available via the World Wide Web.

Thesis (M.Sc.) -- Memorial University of Newfoundland. / Typescript. Bibliography: leaves 137-147. Also available online.

Thesis (M.S.)--Oregon State University, 2007. / Printout. Includes bibliographical references (leaves 67-71). Also available on the World Wide Web.

Thesis (Ph. D.)--University of Chicago, 1922. / "A Dissertation, submitted to the Faculty of the Ogden Graduate School of Science in candidacy for the Degree of Doctor of Philosophy, Department of Geology." "Private edition, distributed by the University of Chicago Libraries, Chicago, Illinois." "Reprinted from U.S. Geological survey, Professional paper 128 ... 1920." Includes bibliographical references.

No description available.

Experimental, plane strain deformations of plasticene and clay multilayers containing pre-cut ramps, have generated broad, flattopped to narrow, rounded fold geometries. Initial boundary conditions, including lubrication, end effects, and the ratio of mechanical unit to overburden rigidity determine proportions of translation and amplification which operate during the development of three main and two hybrid fold forms. Each fold geometry exhibits a unique strain pattern, but generally shows highest strains on overturned limbs, and above ramp regions. Lowest strains occur in footwall layers and between ramps. During folding, strain is produced by combinations of bending, rotation, flexural slip, and flexural flow. Layer parallel shortening strain transpires primarily before fold formation above ramps. Fold forms are dictated by the sequence of mechanisms, and proportional changes in strain mechanism magnitudes. Flexural slip predominates in flat-topped forms, while flexural flow prevails in rounded forms. Bending strain is minor in all geometries. Ellipse long-axis orientations define cleavage patterns which are more complex than proposed theoretical patterns due to variations in analogue lubrication and layer anisotropy. Analogue strain patterns may have potential for use in delineating subsurface folds and their history of development. An investigation of strain and mesoscopic structure was undertaken in the Burkes Garden dome, located in the Narrows thrust sheet in southwest Virginia to delineate the dome's history of formation. The Burkes Garden dome is a broad, flat-topped structure containing two mesoscopifold sets trending N55E and N62W, subregional (N50E) and local (outlines dome shape) cleavage orientations, northwest and southeast dipping faults, and northwest and southeast verging folds. Strain values ( R = 1.1 - 1.5) are low and show little variance in the dome. Regional and mesoscopic structure, and strain values suggest dome development results from duplex formation in the Cambro-Ordovician dolomite/limestone package below the overlying Narrows thrust sheet. Duplex formation can be continued down strike by varying the number of horses and stable ramp position. Differential amounts of movement along the Saltville fault and/or lateral ramps at depth may have produced weak localized strike-parallel compression, resulting in northwest trending folds, and local cleavage orientations. Sheet lock-up probably occurred late during dome development producing northwest dipping faults, and southeast verging folds. / M.S.

The vocal folds are essential for speech production, and a better understanding of vocal fold vibration characteristics may help improve treatments of voice disorders. However, studying real vocal folds presents significant challenges. In-vivo studies are limited by access and safety issues. Excised larynges have a short useable lifetime (on the order of minutes) and are difficult to parameterize. In contrast, synthetic vocal fold models have long useable lifetimes and can be easily parameterized. In this thesis, a series of tests performed on recently developed synthetic, self-oscillating models of the human vocal folds are discussed. These tests include measurements of vibration frequency, sub-glottal pressure, and time-averaged flow rate. The differences between one-layer and two-layer synthetic models are evaluated. Comparisons are made between synthetic model and real vocal fold behavior. The synthetic model is shown to have vibrated at frequencies, pressures, and flow rates consistent with human phonation. The influence of sub-glottal tube length on model vibration frequency is examined. Motion is observed using high-speed imaging. Velocity measurements of the glottal jet using particle image velocitmetry (PIV) were performed with and without an idealized vocal tract, including the effects of the false folds, for various cases of vocal tract asymmetry. Glottal jet velocities measured using PIV were consistent with velocities measured using excised larynges. A starting vortex was observed in all test cases. The presence of the false folds acted to restrain the sides of the starting vortex, and in some cases created new vortical structures shed from the false folds. An algorithm was created to calculate and visualize the jet core centerline. In the vocal tract cases, the glottal jet tended to skew toward the nearest wall; in the false fold cases, the opposite trend was observed as the jet skewed away from the nearest wall (towards the midplane). Plots of RMS velocity showed distinct regions of shear layer and jet core. Vocal tract cases at pressures much greater than phonation onset pressure showed significant increases in RMS velocities compared to open jet and false fold cases.

No description available.