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This study investigates the relationships among literature, educational leadership and teaching. A review of professional literature suggests that literature, leadership and teaching share the characteristics of meaning making, dialogue, artistic/aesthetic experience, transformation, and empathy. The purpose of the study was to consider current educational leaders interpretations of their experiences as humanities instructors and its connection to leadership in their current positions. The author reflects on preparation paths for prospective leaders as well. Three life stories were collected from current educational leaders who previously served as English instructors. Narrative inquiry methodology was utilized, and texts were analyzed using selectivity, slippage, silence, and intertextuality (Casey, 1993; Casey, 1995-1996). Each leader was positioned within a leadership paradigm based on their language and interpretive experiences as leaders. While all felt explicitly that their experiences as English instructors impacted their style and beliefs as educational leaders, textual analysis suggested that family background and personal experiences most influence leadership style and philosophy.

Film cooling has been selected for the thermal protection of the composite nozzle extension of the J-2X engine which is currently being developed for the second stage of NASA's next generation launch vehicle, the Ares I rocket. However, several challenges remain in order to achieve effective film cooling of the nozzle extension and to ensure its safe operation. The extreme complexity of the flow (three-dimensional wakes, lateral flows, vorticity, and flow separation) makes predicting film cooling performance difficult. There is also a dearth of useful supersonic film cooling data available for engineers to use in engine design and a lack of maturity of CFD tools to quantitatively match supersonic film cooling data. This dissertation advances the state of the art in film cooling by presenting semi-empirical analytical models which improve the basic physical understanding and prediction of the effects of pressure gradients, compressibility and density gradients on film cooling effectiveness. These models are shown to correlate most experimental data well and to resolve several conflicts in the open literature. The core-to-coolant stream velocity ratio, R, and the Kays acceleration parameter, KP, are identified as the critical parameters needed to understand how pressure gradients influence film cooling performance. The convective Mach number, Mc, the total temperature ratio, Ω0, and the Mach number of the high speed stream, MHS, are shown to be important when explaining the effects of compressibility and density gradient on film cooling effectiveness. An advance in the simulation of film cooling flows is also presented through the development of a computationally inexpensive RANS methodology capable of correctly predicting film cooling performance under turbulent, subsonic conditions. The subsonic simulation results suggest that it in

Plant responses to abiotic stress are neither singular nor linear. The research represented within this dissertation was intended to evaluate selected biochemical and physiological responses in two Arugulas (Images 1-5), to agronomic interventions designed to mitigate extreme environmental abiotic factors, characteristic of arid agricultural production regions. Plant stress responses were investigated under field conditions and within controlled environments (CE), during the course of a preliminary trial and three independent studies, all four directly related. The preliminary trial evaluated harvest and postharvest nutritional content (i.e., antioxidants) of two Arugulas, Eruca sativa (L.) Cav. ssp. sativa (P. Mill.) and Diplotaxis tenuifolia (L.) DC cv. Sylvetta; grown under field conditions in the semi-arid upper Sonoran Desert. In this trial, we defined baseline harvest and postharvest antioxidant values for the Arugulas, cultivated in a semi-arid environment. The initial study, conducted within a CE utilizing a water recycling system, evaluated changes in the nutritional value of three specialty leafy cruciferous vegetables: D. tenuifolia, E. sativa and Lepidium sativum; when subjected to increasing salinity levels in the nutrient solution. It was concluded that, when specific Crucifers are irrigated with moderately high levels of salinity, neither harvest nor postharvest nutritional values are compromised. The second study, investigated the response of a suite of plant physiological parameters (e.g., yield and photosynthetic rate) in the three Crucifers to salinity, within the CE. This research provided guideline salinity values where yields did not decline, and encourages growers to consider water resources compromised by salinity and nutrient solution recycling. During the third study, the influence of environmental conditions on the nutritional content in leafy vegetables, prevalent immediately before harvest, was investigated; by subjecting plants to reduc

My graduate studies have centred on the use of technologies such as the Internet in the classroom. In most of my classes I was able to apply technological concepts to the topic at hand. For my culminating activity I have applied the knowledge I have gained to help another teacher use technology in her class. Specifically, I helped Connie Gross set up and administer an Internet home page in a Social Studies 30 audiographic conferencing class for the Lethbridge Community College Off-campus centres. In addition we discussed, implemented, and evaluated strategies for using the Internet in a teleconference class. I feel that the opportunity to guide a colleague through concepts I have gleaned while in graduate studies has been an excellent way to complete my graduate studies program. This, then, is the culminating report to my activities. Herein I include a journal recorded during the process and a summation of the journal in a report. Also, in the appendices I include some valuable informtion. First, a report written by Connie regarding her experience. Next, samples of email and listserv postings. Finally, perhaps the most important, Connie's web site. (To view the web site in a better format direct your web browser to http://www.agt.net/public/taIc/ss30Iindex.htm .)

Thermodynamic measurements of the properties of methane adsorbed on graphite have been made in the range, roughly, of 1-6 molecular layers and 64-105 K. Interpreting the results in the context of current models, a tentative conclusion that layer by layer critical points occur at approximately constant temperature near 78 K is drawn. A line of melting transitions extending from the bulk triple point, Tt = 90.66 K. into the multilayer region at temperaturesnear 90 K is also observed, and while these transitions do not appear to be first order, there is an associated change in entropy. This change in entropy gradually diminishes, and vanishes entirely at about two layers. It is not clear how this line of transitions ends, but it is thermodynamically forbidden from ending in a critical point. Finally, the Landau potential has been constructed and tabulated as a function of its proper variables, namely temperature and chemical potential. This gives a complete thermodynamic description of the methane film in the range studied.

We have made thermodynamic measurements of the properties of methane adsorbed on graphite in the ranges, roughly, 1—6 molecular layers and 64—105 K. Interpreting the results in the context of current models, we tentatively conclude that layer by layer, critical points occur at approximately constant temperature around 78 K. Extrapolation of this observation would imply a roughening transition in bulk solid methane at about that temperature. We also observe a line of melting transitions that extends from the bulk triple point, Tt=90.7 K, into the multilayer region at nearly constant temperature. The transition in films of less than ∼5 layers does not appear to be first order, but it is associated with a change in entropy. The change in entropy gradually diminishes, vanishing entirely at about 2 layers. It is not clear how the transition closes, but a number of possibilities is discussed.