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Graduate Theses & Dissertations
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- Predictive Digital Mapping of Soils in Kitimat, British Columbia
- Soil is an essential natural resource that supports provisioning services such as agriculture, silviculture, and mining. However, there is limited knowledge on forest soil properties across Canada. Digital soil mapping may be used to fill these data gaps, as it can predict soil properties in areas with limited observations. The focus of this study was to develop predictive maps of select soil physicochemical properties for the Kitimat Valley, British Columbia, and apply these maps to assess the potential impacts of sulphur dioxide emissions from an aluminum smelter, on soil properties in the Valley. Exchangeable [Ex.] magnesium, organic matter, pH, coarse fragment, Ex. potassium, bulk density, Ex. calcium, Ex. acidity, and Ex. sodium were all mapped with acceptable confidence. Time to depletion of base cation pools showed that ~240 km2 of the study area had a depletion time of 50 years or less. However, sources of base cations such as atmospheric deposition and mineral weathering were not considered. Author Keywords: acidification, buffering capacity, Digital soil mapping, predictive mapping, regression kriging, soil properties
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- Utilizing Class-Specific Thresholds Discovered by Outlier Detection
- We investigated if the performance of selected supervised machine-learning techniques could be improved by combining univariate outlier-detection techniques and machine-learning methods. We developed a framework to discover class-specific thresholds in class probability estimates using univariate outlier detection and proposed two novel techniques to utilize these class-specific thresholds. These proposed techniques were applied to various data sets and the results were evaluated. Our experimental results suggest that some of our techniques may improve recall in the base learner. Additional results suggest that one technique may produce higher accuracy and precision than AdaBoost.M1, while another may produce higher recall. Finally, our results suggest that we can achieve higher accuracy, precision, or recall when AdaBoost.M1 fails to produce higher metric values than the base learner. Author Keywords: AdaBoost, Boosting, Classification, Class-Specific Thresholds, Machine Learning, Outliers
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- Civil Aviation and Scheduled Air Services in Colonial Botswana, 1935-1966
- This thesis provides an in-depth and chronological study of the development of civil aviation in the Bechuanaland Protectorate (today’s Botswana), and the role played by the British Government in the development of this form of transport. The thesis argues that Her Majesty’s Government’s neglect and very little interest in its protectorate’s civil aviation represented a form of underdevelopment. The study also reveals the constant contradiction between the neglect of the imperial government and the constant lobbying on the part of colonial administration in the Protectorate for the establishment of an air service. To the colonial administrators, civil aviation represented a symbol of modernity and progress as well as more practical advantages such as mobility. The thesis finally concludes that the Bechuanaland Protectorate’s first airline was established due to growing nationalism both locally and on the continent, at large. The British Government facilitated the establishment of the airline as an attempt to appear benevolent to the protectorate on the eve of independence. Author Keywords:
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- Anarchist Periodical Press in the United States
- This dissertation focuses on the English-language anarchist periodical press in the United States in the 1890s and early 1900s. Each of the three chapters of this dissertation examines one anarchist paper and its coverage of a specific issue. The first chapter focuses on Prison Blossoms, which was started by Alexander Berkman, Carl Nold, and Henry Bauer and written and circulated in the Western Penitentiary of Pennsylvania, and its engagement with Alexander Berkman's attempt to assassinate Henry Clay Frick. The second chapter examines Free Society, a weekly edited primarily by Abraham Isaak, and its contributors' writings on the assassination of President William McKinley by self-described anarchist Leon Czolgosz. Finally, the third chapter focuses on The Demonstrator, specifically its first volume which was edited by James F. Morton Jr. from the intentional community of Home, Washington, and the paper's work in supporting John Turner, the first anarchist targeted for deportation under the Immigration Act of 1903. Drawing upon critical discourse analysis, this dissertation incorporates examination of the context in which these papers were written (particularly the immediate concerns to which the papers' authors responded), the form and generic conventions of the anarchist press, including the approaches of the papers' respective editors, and the arguments advanced by their authors. It pays particular attention to the intertextuality of the anarchist press -- the ways in which those writing in anarchist papers addressed one another both within and across periodicals, generating anarchist thought through conversation and debate and enacting their anarchist ideals in the practice of publishing. This dissertation demonstrates that the anarchist periodical press, an element of anarchist history that has received little attention, offers important insights: it details how anarchists immediately responded to important issues of their time, and reveals the ways in which the emergence of anarchism was itself a collective effort, emerging from conversation, debate, and disagreement about how best to create radical change and what that change should look like. Author Keywords: anarchism, anarchist periodicals, critical discourse analysis, Free Society, Prison Blossoms, The Demonstrator
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- Know*ledge Constellations and Re*constellating
- The purpose of this study was to explore the educational implications of a clearer understanding of the practice of using multiple, including Indigenous, knowledges when finding solutions to place-based environmental issues. The impetus for my research came from a growing sense of urgency to address environmental issues within both Indigenous and non-Indigenous communities. Some have argued that communities will be most successful in understanding and resolving such issues if ways can be found to work with different knowledges. However, the practice of bringing together multiple knowledges is not yet consistently effective. At the same time, there is a recognised need for individuals who are able to use different knowledges to address urgent environmental concerns. Unfortunately, there is minimal programming advice based on the perspective of individual practitioners available to guide post-secondary institutions wishing to meet this need. This lead to my first two research questions: What are the key principles and concepts in a narrative describing how individual practitioners think about using knowledges when finding solutions to place-based environmental issues? and What are the implications of this understanding for teaching and learning, especially in post-secondary Indigenous-and-Environmental education? In my project, I used a relational research approach that led to a third question: How is a complexity-inspired interpretive approach suitable for exploring these questions? I had coherent conversations with sixteen practitioners who were deliberately using multiple, including Indigenous, knowledges to find solutions to place-based environmental issues. Practitioners and I co-created a Know*ledge Constellation Story to describe how they think about using knowledges in their work. In a group coherent conversation with five educators who were familiar with Indigenous-and-Environmental education, we explored the educational implications of this story. Together, we finalised a Teaching-Learning Story of Re*constellating and identified ways to prepare students to practice re*constellating, including teaching strategies and program considerations. The Know*ledge Constellation Story and the Teaching-Learning Story of Re*constellating will inform post-secondary Indigenous-and-Environmental education. Graduates from such programs will be better prepared to engage with communities to address environmental concerns, meet legislative and policy requirements, and support research efforts that would benefit from a clearer understanding of the practice of re*constellating. Author Keywords: Complexity-Inspired Interpretive Approach, Conditions of Emergence, Indigenous-and-Environmental Education, Know*ledge Constellations, Principles of Re*constellating, Teaching and Learning
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- Mythopoeia Sylvatica
- Since British colonization of North America and the beginning of Anglo-speaking Euro-Canada and the United States, myth-making or representations of the forests have witnessed degradation and loss of old-growth forest ecosystems or intact sylvan landscapes. Canadian and American versions of the story of the North American Forests shared the same trajectory: forests as ‘wasted-land’ or the sylvan wilderness (terra nullius) divided into properties and cleared to “improve” the land for settlement/agriculture, forests as storehouses for timber and imperial expansion, forest landscapes and specific forest trees as identity politics and sources of industrial and economic power. While forests are recognized according to various stakeholders’ values today, what is commonly accepted as a forest varies widely. The meaning given to “forest” determines related terms and concepts, such as “sustainable forestry” and “reforestation.” This thesis addresses the issue of social-bioecological degradation, loss, and dis(re)membering of old-growth forests and problematizes traditional Western relationships with old wildwoods shaped by notions of space, politics, and economy. In the forest topos, the core question becomes which forest(s) are being imagined, represented, and remembered? Whose environmental imagination is shaping the landscape? As a critical topographical exploration of the North American forests through six witness trees, this thesis demonstrates how the meanings imbued in trees and wild woods come to determine the fate of the forests. It reveals how colonial values and trends persist in our societies still, and calls for an ethical social-ecological reimagining of the forests through traditions of ethical storytelling and environmental witnessing. Author Keywords: critical topography, environmental generational amnesia, environmental witnessing, forests, social-ecological systems, witness trees
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- Eros noir
- The dissertation explores the aesthetic anthropology of Georges Bataille and his collaborators in the Collège de Sociologie, a distinguished group of intellectuals including Roger Caillois, Michel Leiris, Pierre Klossowski, and Walter Benjamin among others. At the dissertation's outset the role, influence, discovery and indeed invention of the Marquis de Sade as the almost mythic prefiguring for so much French aesthetic thought in the period beginning after World War One and up until even the present day is advanced. Before Freud in Vienna, Sade in Paris: the central thematic axis of the following addresses Eros noir, a term for reflecting on the danger and violence of sexuality that Freud theorizes with the "death drive." The deconstruction of the nude as an object and form in particular in the artwork of Hans Bellmer and the writing and art of Pierre Klossowski comprises the latter two chapters of the dissertation, which provides examples of perversion through the study of simulacra and phantasms. The thwarted pursuit of community in the vacated space of Nietzsche's death of a God is a persistent leitmotif of the following in the account it offers of the thought of Georges Bataille and other members of the Collège de Sociologie. Eros noir, at the fatal cusp between ascendant manifest sex and a latent diminished Christianity, underwrites much of the French intellectual contribution to the symbology of cultural modernism. Author Keywords: Bataille, Georges, 1897-1962, Collège de Sociologie, Eroticism, Sade, marquis de, 1740-1814, Surrealism, The Uncanny
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- Politics of Memory
- In dialogue with the critical scholarship on war and remembrance, my research deals with the construction, contestation and negotiation of collective memory in contemporary Vietnam with a focus on commemorations devoted to dead soldiers. Utilizing the methodologies of cultural studies and ethnography, this research seeks to comprehend the politics of memory which characterize collective memory as a social phenomenon whose meanings, interpretations and forms are variedly constructed from a certain social group to the next. Empirically, in this research, constitutive elements of Vietnamese postwar memoryscapes including the hero-centered discourse sanctioned by the Communist Party and the Socialist state, the family remembrance rooted in religious and kinship mandates and the newly emerged online ecology of memory are examined in their own nature as well as in their complicated intertwinements and constant interactions with each other. Case studies and specific methods of individual interview, participant observation and cultural analysis enable the author to approach and identify a wide range of forms and intersections between official and vernacular practices, between oral and living history and institutionalized and cultural presentations of memory. While considering these issues specifically in the Vietnamese context, my dissertation contributes to the increasing theoretical debates in the field of memory studies by exploring the relation of power and the symbolic struggle within and between different social agents involved. As it emphasizes the dynamic and power of memory, this research furthermore situates the phenomenon of collective memory in its dialogues with a broader cultural political environment of postwar society, which is characterized as a hybrid condition embracing processes of nationalism, modernization and post-socialist transformation. Significantly, during these dialogues, as demonstrated in this research, memory works embrace presentism and future-oriented functions which require any social group who is involved to negotiate and renegotiate its position, and to structure and restructure its power. Last but not least it must construct and reconstruct its own versions of the past. Author Keywords: collective memory, Dead soldiers, postwar society, Socialist Vietnam, the politics of memory, war remembrance
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- Stopover Movement Patterns by Blackpoll and Canada Warblers Across Southeastern Canada During Fall Migration
- Stopover ecology is a topic that surges in relevancy as choices made by migrants during stationary periods (stopover sites) may not only have important individuals’ fitness consequences but also can affect population dynamics. I used MOTUS automated telemetry array to study fall stopover duration of Blackpoll Warbler (BLPW) and departure decisions of BLPW and Canada Warbler (CAWA) in relation to various predictors. I affixed radio-transmitters on 55 BLPWs and 32 CAWAs at two banding stations in Ontario in September-October 2014-2015. Radio-tagged individuals were tracked through the MOTUS network across southeastern Canada. I developed models relating age class, fat score, Julian date and stopover movement types to Blackpolls’ stopover duration. I also examined whether there were species-related differences of wind selectivity when resuming migration. No explanatory variable significantly influenced BLPW’s stopover duration. Both species tended to depart under increased tailwind assistance, but with no difference in the effect of wind conditions between the two species. This study provides further evidence supporting the relevance of local wind conditions as a key factor affecting the departure likelihood, especially when migrating birds face an ecological barrier. Author Keywords: Cardellina canadensis, departure decisions, minimum stopover length, MOTUS, overland fall migration, Setophaga striata
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- the sex killer drives a panel pin into his ear-hole
- I have two goals. One, to offer new insights into Vienna Actionism (VA) and their notorious performances, through Gilles Deleuze and Félix Guattari’s notion of the body without organs (BwO); and two, not simply to provide descriptions of the Vienna Actionists’ performances, but also to write what I am calling a thesis without organs. Documents from the Vienna Actionists, specifically Muehl’s Leda and the Swan (1964), Brus’ Vienna Walk (1965) and Nitsch’s O.M. Theatre (1960-present), become documents without organs; they are documents that do not simply document original performances, but re-perform original performances while acting as performances themselves. Challenging the notion of live performance as fundamentally separate from its documentation (as performance theorist Peggy Phelan argues) through what Philip Auslander calls the document’s performativity and what Christopher Bedford calls a viral ontology of performance, my thesis becomes a performance in and of itself. A thesis without organs. Keywords: performance, performativity, viral ontology of performance, body without organs, rhizome, dirt, metaphor, metonymy, Vienna Actionism, Gilles Deleuze, Félix Guattari, Peggy Phelan, Philip Auslander, Christopher Bedford, Mary Douglas. Author Keywords: Body without Organs, Performance, Performativity, Vienna Actionism
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- Regulation of Cytokinins During Kernel Development in High and Low Yielding Oat and Barley Lines
- Cytokinins (CKs) are a family of plant phytohormones responsible for many areas of plant growth and development. There are four free base types of CKs found in higher plants, trans-zeatin (tZ), N6-(∆2-isopentenyl)adenine (iP), cis-Zeatin (cZ) and dihydrozeatin (DZ). CK biosynthesis is regulated by adenosine phosphate-isopentenyltransferase (IPT), which is encoded by a multi-gene family in many plant species. There are two types of IPT pathways responsible for CK production, the tRNA pathway and the AMP (ATP/ADP) pathway. The tRNA pathway putatively produces cZ and the latter predominantly produces iP type nucleotides. CKs have long been studied for their role in stress tolerance, signal transduction, and involvement in many areas of plant growth and development. This study focuses on the role of CKs and CK biosynthesis by IPT during kernel development and comparisons of its regulation in high and low yielding barley and oat lines. The sequence of a putative IPT encoding gene in barley and oat was identified by a blast search of other known IPT gene fragments in closely related species. Quantitative Real time PCR results based on primers designed for the putative barley and oat IPT gene revealed changes in expression of IPT during different stages of kernel development, but no significance difference was associated with yield. Correlation of IPT gene expression in barley with cZ CK profiles measured by HPLC-MS/MS, confirms a putative IPT gene is a tRNA- IPT. HPLC-MS/MS results reveal some CK types, such as benzyladenine, are more predominant in higher yielding lines. This suggests different types of CKs play a role in yield production. Future studies on more IPT genes in the barley and oat IPT gene family will outline a more clear representation of the role of IPT in barley kernel development. Author Keywords: Benzyladenine, Cereal grain, Cytokinin, Isopentenyl Transferase, Mass Spectrometry, Real Time PCR
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- Time-dependent effects of predation risk on stressor reactivity and growth in developing larval anurans (Lithobates pipiens)
- The predator vs. prey dynamic is an omnipresent factor in ecological systems that may drive changes in life history patterns in prey animals through behavioural, morphological, and physiological changes. Predation risk can have profound effects on the life history events of an animal, and is influenced by the neuroendocrine stress response. Activation of the hypothalamic-pituitary-adrenal/interrenal axis, and the induction of stress hormones (e.g., corticosterone (CORT)) have been shown to mediate the onset of inducible anti-predator defensive traits including increased tail-depth, and reduced activity. The predator-prey relationship between dragonfly nymphs and tadpoles can be a powerful model system for understanding mechanisms that facilitate changes in the stress response in accordance with altered severity of risk. It has been well demonstrated early in tadpole ontogeny that increased corticosterone (CORT) levels, observed within three weeks of predator exposure, are correlated with increased tail depth morphology. However, the reactivity of the stress response in relation to the growth modulation in developing prey has yet to be fully explored. Accordingly, this thesis assessed the stress and growth response processes in tadpoles that were continuously exposed to perceived predation risk later in ontogeny. Continuous exposure of prey to predation risk for three weeks significantly increased CORT levels, and tail depth. However, tadpoles exposed to six weeks of predation risk acclimated to the presence of the predator, which was observed as a significant reduction of stressor-induced CORT levels. In addition, although increased tail depth has been attributed to predator defense, predator-naïve tadpoles began to display similar tail depth morphology as treated tadpoles at the six week time point. Thus, this thesis suggests that the stress response in lower vertebrate systems (e.g., tadpoles) may operate in a similarly complex manner to that observed in higher vertebrates (e.g., rats), for which severity of risk associated with the stressor aids in defining activity of the stress response. Moreover, the lack of morphological difference between treatments among tadpoles exposed later in ontogeny suggests that the mechanisms for inducing defenses are normal morphological traits in the development of the animal. This thesis paves the way for future research to elucidate the relationship between the neuroendocrine stress response and hormonal pathways involved in growth modulation in the presence of environmental pressures. Author Keywords: Acclimation, Corticosterone, Growth Modulation, Predation Risk, R. pipiens, Tadpole