Graduate Theses & Dissertations


Nutritional stoichiometry and growth of filamentous green algae (Family Zygnemataceae) in response to variable nutrient supply
In this study, I investigate the effects of nitrogen (N) and phosphorus (P) on the nutritional stoichiometry and growth of filamentous green algae of the family Zygnemataceae in situ and ex situ. I found a mean of Carbon (C):N:P ratio of 1308:66:1 for populations growing in the Kawartha Lakes of southern Ontario during the summer of 2012. FGA stoichiometry was variable, with much of the variation in algal P related to sediment P (p < 0.005, R2 = 0.58). Despite large variability in their cellular nutrient stoichiometry, laboratory analysis revealed that Mougeotia growth rates remained relatively consistent around 0.28 day-1. In addition, Mougeotia was found to be weakly homeostatic with respect to TDN:TDP supply (1/HNP = 0.32). These results suggest that FGA stoichiometry and growth rates are affected by sediment and water N and P. However, they will likely continue to grow slowly throughout the summer despite variable nutrient supply. Author Keywords: Chlorophyll concentration, Filamentous algae, Growth rate, Homeostatic regulation, Nutritional stoichiometry
Reshaping the Terms of Debate
The Reagan era instigated a fundamentally conservative shift in the political, economic and discursive climate of America. As Ronald Reagan is a highly divisive symbolic figure in American politics, much of the historiography of his presidency has been characterized by polarized interpretations. Over the past decade there has been a noticeable shift towards more favourable and triumphal interpretations of the Reagan era. This thesis seeks to analyze the ideological shifts that have characterized the trajectory of historical writings on the Reagan era. Through employing a careful textual analysis of key works by Michael Schaller, Gil Troy and Sean Wilentz, amongst others, this study demonstrates how historiography serves us less as an objective means of understanding the past and more so as an expanding collective historical artifact that illustrates the changing currents of intellectual and political discourse. In doing so, the notion of scholarly objectivity itself is thrown into question. Author Keywords: Cold War, Conservatism, Historiography, Neoliberalism, Reagan Doctrine, Ronald Reagan
Battle of Maldon
The Battle of Maldon: A Medieval Screenplay History and Heroism in the Cinematic Adaptation of an Old English Poem The Battle of Maldon is an artistic representation of a historical event whose style lends itself to being adapted into a screenplay. This project examines how the poem presents a recent event in an epic heroic style, mixing history with legend, and how the heroism of the men in the poem is celebrated. These explorations lead to the creation of a screenplay which imitates the ways that the poet combines fact and fiction and situates the screenplay within the larger realm of medieval film. Author Keywords: Anglo-Saxon history, Byrhtnoth, film, heroism, Maldon, The Battle of Maldon
Assessing the Effects of Brief Interventions on Mood and Dream Imagery in Recovering Alcohol and Drug Addicts
Addiction can lead to a plethora of health, social and economical problems. Substances are used for mood regulation, and therefore, waking day mood is extremely important during recovery of alcohol and drug addiction. The current study examined the effects of Meditation and Sleep Mentation Therapy on mood levels. All participants were male, and currently in treatment programs or early stages of recovery from alcohol and drug addiction. Participants were tested for anxiety and depression and were asked to provide a recent dream, prior and post to participating in the intervention. Dreams were scored using Hall and Van de Castle guidelines for scoring imagery. Results are consistent with previous research in that mood levels changed over the course of the meditation period. Implications for future research are discussed as well as applications of Sleep Mentation Therapy and Meditation in clinical and applied practice. Author Keywords: Addiction, Dream Therapy, Meditation, Mood
Politics of Muslim Intellectual Discourse in the West
The dissertation explores and defends the theory and practice of a Western-Islamic public sphere (which is secular but not secularist and which is Islamic but not Islamist), within which a critical Islamic intellectual universe can unfold, dealing hermeneutically with texts and politically with lived practices, and which, moreover, has to emerge from within the arc of two alternative, conflicting, yet equally dismissive suspicions defined by a view that critical Islam is the new imperial rhetoric of hegemonic orientalism and the opposite view that critical Islam is just fundamentalism camouflaged in liberal rhetoric. The Western-Islamic public sphere offers a third view, arising from ethical commitment to intellectual work, creativity, and imagination as a portal to the open horizons of history. Author Keywords: Critical Islam, critique, history, Islamic reformation, public sphere, secular
Transcendental Turn
This dissertation traces the concept of transcendentalism from Kant's Critique of Pure Reason (1781) to Michel Foucault's historical a priori and Pierre Bourdieu's field and habitus, with implicit reference to Deleuze's `transcendental empiricism,' and the influence this trajectory has had on contemporary theory and culture. This general conceptual framework is used as the basis for a critical analysis of a series of examples taken from popular culture to highlight their transcendental conditions of possibility and the influence this conceptual paradigm has had on today's theory. The examples include the NFL `concussion crisis,' South Park's problematization of the discourse surrounding it, as well as the literature of Charles Bukowski, as an exemplification of an immanent writer-written situation. It is further suggested that, not only is transcendentalism an epistemological framework for thought, but it also doubles as an ontological principle for the emergence of a constitutively incomplete and unfinished reality. Author Keywords: Bukowski, Concussion, Foucault, Kant, South Park, transcendental
An Application of the Sinc-Collocation Method in Oceanography
In this thesis, we explore the application of the Sinc-Collocation method to an oceanography model. The model of interest describes a wind-driven current with depth-dependent eddy viscosity and is formulated in two different systems; a complex-velocity system and a real-value coupled system. In general, the Sinc-based methods excel over other traditional numerical methods due to their exponentially decaying errors, rapid convergence and handling problems in the presence of singularities at end-points. In addition, the Sinc-Collocation approach that we utilize exploits first derivative interpolation, whose integration is less sensitive to numerical errors. We present several model problems to demonstrate the accuracy, and stability of the method. We compare the approximate solutions determined by the Sinc-Collocation technique with exact solutions and also with those obtained by the Sinc-Galerkin approach in earlier studies. Our findings indicate that the method we utilized outperforms those used in past studies. Author Keywords: Boundary Value Problems, Eddy Viscosity, Oceanography, Sinc Numerical Methods, Wind-Driven Currents
Learning From One Another
Biomaterial technology and utilizing bioproducts can contribute to Canada's economic growth while moving towards sustainable development. Canadian bioproducts are commonly developed within universities but Canada's record of transferring university technology to market has been less than optimal. In an attempt to offer new ideas for improvement, qualitative data analysis from comparing stakeholder interviews in Canada and Brazil regarding university technology transfer through biomaterial spin-off development identifies the enablers and barriers to success. This thesis offers modality changes that if implemented will contribute to increasing university spin-off development in Canada to achieve economic growth and sustainable development. These modality changes include: 1) Create research network alliances; 2) Incorporate university commercialization activities into faculty performance measurement; 3) Implement a general business class as a pre-requisite to all degree requirements; 4) Restructure funding programs from one time sums to phase based implementation; 5) Establish a pre-incubation program in addition to the traditional incubator. Author Keywords: biomaterials, Brazil, Canada, policy, university spin-off, university technology transfer
Finger-Counting Habits and Number Processing in Canadian and Chinese University Students
In the past few years there has been increasing attention paid to the influence of the motor system on numerical cognition. A 2010 study by Domahs, Moeller, Huber, Willmes and Nuerk tested German and Chinese university students. Number processing time was influenced by cross cultural differences in finger counting habits This thesis replicated and elaborated on the aforementioned research design. This consisted of recruiting a sample of from a Chinese university and comparing them to a sample of Canadian university students. This study also compared within culture differences in participants' starting counting hand using additional SNARC analyses. A second experiment evaluated the possibility that asking participants about finger counting habits prior to the experiment may influence later answers. Cross cultural and within culture differences in finger counting habits influenced number processing. Participants also appeared to be more reliable reporters of their finger counting habits if asked at the end of the task rather than at the beginning. Author Keywords: Canadian, Chinese, Cross-cultural, Finger-counting, Magnitude, Number
Human Activity and Habitat Characteristics Influence Shorebird Habitat Use and Behaviour at a Vancouver Island Migratory Stopover Site
Pacific Rim National Park Reserve's 16 km of coastal beaches attract many thousands of people and shorebirds every year. To identify locations where shorebirds concentrate and determine the impact of human activity and habitat characteristics on shorebirds, I conducted shorebird and visitor surveys at 20 beach sectors during fall migration in 2011 to 2013 and spring migration in 2012 and 2013. The probability of shorebird presence decreased with increasing number of people at a beach sector. The time that shorebirds spent at a sector increased with increasing sector width. Close proximity to people increased the proportion of time shorebirds spent moving while shorebirds spent more time moving and less time foraging on wider beaches than on narrower ones. My findings suggest that placing restrictions on beach access and fast moving activities (e.g., running) may be necessary to reduce shorebird disturbance at Pacific Rim and similar stopover areas. Author Keywords: habitat use, human disturbance, predation risk, prey availability, shorebird, stopover
In this study, we attempt to enhance current knowledge of ecological responses to riverine alterations from waterpower by using a bottom-up food up approach. A series of extensive and intensive study components were performed across northern Ontario, Canada, where biological (nutrients, dissolved organic matter (DOM) and periphyton) and physical (water level and thermal regimes) ecological indicators were examined in regards to alterations from dams and waterpower facilities. Overall, we found that the water levels and thermal regimes deviated from their reference condition at sites below the dams, whereas the biological indicators were more resilient to river alterations. Our results suggest that the characteristics of the watershed were influential in controlling the variability of nutrients and DOM resources in rivers within the boreal watersheds of northern Ontario, as well as the for the downstream recovery patterns of the physical indicators. The recovery of the periphyton communities downstream of the dams were also predicted to be cumulatively related to the physical alterations, nutrient availability and the possible displacement of invertebrate communities. Therefore, our bottom-up food web approach was not effective for better understanding how ecological responses from waterpower cascade through aquatic food webs, and instead multiple indicators should be used for examining the ecological responses in these particular river systems. Author Keywords: dissolved organic matter, ecological indicators, river alteration, waterpower facilities
Moving North
Since their successful reintroduction, the eastern wild turkey (Meleagris gallopavo silvestris) has expanded its range north. Due to different and potentially more severe limiting factors, management approaches generalized from studies within the historical range may not be appropriate to apply to northern populations. To better understand northern wild turkey ecology, GPS and VHF transmitters were used to track habitat selection and survival of female turkeys at the species northern range edge in Ontario, Canada. These northern turkeys exhibited larger seasonal home range sizes relative to those in their historical range, and selected deciduous forest and pasture and fields within the study area. Supplemental food was also selected by turkeys when choosing autumn and winter ranges. The northern turkeys also suffered a low annual survival rate, and high mortality from predation. These findings underscore the challenges of maintaining turkey populations in northern environments, and will help inform management strategies. Author Keywords: Eastern Wild Turkey, Euclidean distance analysis, Habitat selection, Meleagris gallopavo silvestris, Northern range edge, Survival


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