Inaug.-diss.--Halle-Wittenberg. / Lebenslauf. Includes Aubrey's, Scott's and Blakeborough's versions of the poem, and a German translation. "Literatur": p. [7]-10.

Thesis (Ph. D.)--University of Washington, 1998. / Vita. Includes bibliographical references (p. [188]-213).

Thesis (M.S.)--University of Michigan, 1990. / eContent provider-neutral record in process. Description based on print version record.

Thesis (M.S.)--University of Michigan, 1990.

The influence of deployment of planned wind farms on the power output and energy yield of wind farms located in close proximity at downwind sites is investigated. The atmospheric model Weather Research and Forecasting (WRF) has been employed to simulate wind resource and energy yield from wind farms in the Baja California region of Northern Mexico. Accuracy of predicted wind speed and wind turbine energy supply are evaluated against full-scale measurements from a met-mast and from each of five 2 MW turbines at the La Rumorosa wind-farm. For this wind farm location, wind speed distribution is predicted to within 1.4% and the energy supply from the farm predicted to within 5.25%. Accuracy depends on the boundary layer model and atmospheric dataset employed. Wind farms are modelled using the scheme developed by Fitch et al. (2012) in which a momentum sink and turbulent kinetic energy source are defined as a function of the turbine thrust coefficient and power output, each of which vary with wind speed as defined by the manufacturer. Planned farms of up to 72 MW installed capacity are defined in terms of turbine number, rated power and spacing at four sites such that each farm operates with a typical capacity factor. For a single farm of 2 MW turbines located 10 km upwind, wind speed at the case study wind-farm is reduced by 3.00% and power output reduced by up to 5.84%. These deficits increase if 5 MW turbines are deployed rather than 2 MW turbines due to the development of a longer far-wake. The net energy supply from several sites in the region is assessed.

For this study, two analytical models were developed for predicting the depth-averaged velocity distribution (U) in trapezoidal, half-trapezoidal and rectangular channels with submerged and unsubmerged rigid cylinders. The first model uses linear superposition of momentum defects (MDS) and mass conservation, and is referred to as the MDS model. The second model uses linear superposition of velocity defects (VDS) and mass conservation, and is referred to as the VDS model. For implementing either the VDS or MDS model, a criterion is required for considering the wake created by an individual cylinder to be fully dissipated (i.e., a cutoff criterion). Also, implementing the MDS model requires numerical integration. Analyses were conducted to identify suitable cutoff criterion and an appropriate subinterval size for the numerical integration. Data from a physical model study conducted in a flume with a half-trapezoidal channel section was used to calibrate and validate the models. Data from a physical model study conducted in a rectangular channel section was also used to validate the model. Predicted values of U from the VDS and MDS models were within the range of ± 20 % of the trapezoidal channel section validation data. The models failed to accurately predict U for the rectangular channel section data. It is concluded that the models developed herein should be used only for half-trapezoidal channel sections. With respect to the trapezoidal channel section validation data, the MDS model yields a sum of squared errors that is 36% less than that yielded by the VDS model. Therefore, the MDS model is regarded as the best model overall for computing U in half-trapezoidal channel sections.

Detailed flow measurements made in a 1 metre diameter, shrouded, centrifugal (Ghost) impeller running at 500 rpm are presented. Relative velocities and rotary stagnation pressures $(p*=p-\frac{1}{2}\ρω^{2}r^{2}+\frac{1}{2}\ρW^{2})$ were measured on five cross-sectional planes between the impeller inlet and the outlet, using probes which were traversed within the rotating impeller passage. The reduced static pressures $(p_{r} = p-\frac{1}{2}\ρω^{2}r^{2})$, calculated from the flow measurements, are also presented. Measurements were made in a 'design' flow (approximately zero incidence at the blade leading edge), a 'below design' flow and an 'above design' flow. A wake flow was observed in all three flows and there were two major sources of the wake fluid. Firstly, from the separation of the shroud boundary layer and secondly, from the accumulation of low p* fluid from the other boundary layers by secondary flows. The results showed that the wake's position at the outlet moved from the suction side in the 'below design' flow, to the suction-side/shroud corner region in the 'design' flow and to the shroud in the 'above design' flow, because of the change in the relative strengths of the secondary flows generated by rotation and curvature. The modifications to turbulent mixing, by curvature and rotation, probably influenced the wake size. In order to predict the wake's location at the impeller discharge, a simple secondary flow model, which represented the impeller as a pipe bend, was devised. This model was successfully tested on two analytically soluble flows, in a stationary bend and in a rotating straight pipe. The model was then used for the more complex flows in a rotating axial-to-radial bend and in the Ghost and Eckardt's centrifugal impellers. The theoretical results for these impellers showed several of the features observed in the flow measurements.

This dissertation considers Finnegans Wake as a deconstructive writing that exemplifies many of the textual operations that the French critical theorist Jacques Derrida attempts to define through his use of such "undecidable" terms and "non-concepts" as "difference," "dissemination," "trace," and "grafting." It argues that the Wake operates much like the "bifurcated writing" and "grouped textual field" that Derrida identifies as the only possible site for a deconstructive engagement of the terms and concepts of the Western metaphysical tradition, the tradition that Derrida terms phallogocentrism. The Wake has been an important text in the critical formulations of many contemporary theorists, and, as Derrida has recently acknowledged, his own theories of dissemination and deconstruction have been considerably affected by the Wake during the twenty-five to thirty years that he has been learning to read it. In drawing on Derrida's theories to analyze the Wake, this dissertation utilizes Derrida's terms to "re-mark" in Joyce's text, the disseminative textual operations that Derrida has marked as operative in the texts of the history of philosophy and in "so-called literary" texts like Finnegan’s Wake. In a certain sense, it renders unto Joyce's text that which has always already belonged to it. Drawing on Derrida's investigation of speech and writing, the dissertation considers the Wake's identification of itself as a fusion of speech and writing that requires a "speechreading" on the part of its readers. It supports this consideration by employing Umberto Eco's semiotic methodology to trace the network of metonymic lexemes by which the Wake identifies itself as a writing for the ear as well as the eye. Next it analyzes the Wake's tenth chapter as a chapter that exploits the formula 1+2+3+4=10 and produces a writing that operates as an arithmetical textual machine which problematizes the traditional concepts of presence and being and which also works towards dislodging the phallogocentric organization of writing with such hierarchically organized binary terms as male/female and central/marginal. In order to illustrate how the Wake disseminatively disrupts the binary terms by which phallogocentrism dominates thought, speech, and writing, the dissertation also considers how Joyce's text functions in an Intertextual relationship with some of the writings of Blake and Shakespeare. It does this by analyzing how the Wake dismantles some of the philosophical paradigms operating in the Blake and Shakespeare texts and takes important signifiers from those texts in order to set them to work as signifiers of signifieds that are radically different from those in the texts of Blake and Shakespeare. / Arts, Faculty of / English, Department of / Graduate

Background and purpose: The purpose of this study was to identify whether or not sleep behaviors mediated bioecological predictors of weight-related behaviors among college students. Methods: This descriptive, quantitative, cross-sectional study, guided by Bronfenbrenner's bioecological model, examined bioecological characteristics and path analysis to assess model fit. Conclusions: The fit indices indicated excellent fit of the final model to the data (x2 (24) = 30.33, p =.17, root-mean-square error approximation = 0.04, comparative fit index = 0.96, standardized root-mean-square residual = 0.03). Sleep duration mediated significant bioecological predictors of weight-related behaviors, but sleep quality did not. Having children significantly predicted increased sugar-sweetened beverage (SSB) consumption and decreased physical activity (PA) among college students. Conversely, eating the majority of meals at home significantly predicted decreased consumption of SSBs and increased PA. Implications for practice: Findings support inclusion of sleep duration and use of the bioecological model, when providing patient-centered healthcare focused on weight-related behaviors and weight management in college students.

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