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Graduate Theses & Dissertations
Pages
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- Bioremoval of copper and nickel on living and non-living Eugelna gracilis
- This study assesses the ability of a unicellular protist, Euglena gracilis, to remove Cu and Ni from solution in mono- and bi-metallic systems. Living Euglena cells and non-living Euglena biomass were examined for their capacity to sorb metal ions. Adsorption isotherms were used in batch systems to describe the kinetic and equilibrium characteristics of metal removal. In living systems results indicate that the sorption reaction occurs quickly (<30 min) in both Cu (II) and Ni (II) mono-metallic systems and adsorption follows a pseudo-second order kinetics model for both metals. Sorption capacity and intensity was greater for Cu than Ni (p < 0.05) and were described by the Freundlich model. In bi-metallic systems sorption of both metals appears equivalent. In non-living systems sorption occurred quickly (10-30 min) and both Cu and Ni equilibrium uptake increased with a concurrent increase of initial metal concentrations. The pseudo-first-order model was applied to the kinetic data and the Langmuir and Freundlich models effectively described single-metal systems. The biosorption capacity of Cu (II) and) was 3x times greater than that of Ni (II). Sorption of one metal in the presence of relatively high concentrations of the other metal was supressed. Generally, it was found that living Euglena remove Cu and Ni more efficiently than non-living Euglena biomass in both mono- and bi-metallic systems. It is anticipated that this work should contribute to the identification of baseline uptake parameters and capacities for Cu and Ni by Euglena as well as to the increasing amount of research investigating sustainable bioremediation. Author Keywords: accumulation, biosorption, Cu, Euglena gracilis, kinetics, Ni
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- Lacanian Realism
- The overarching argument of this manuscript concerns Lacanian Realism, that is, the Lacanian theory of the Real. Initially, my argument may seem quite modest: I claim that Lacanians have been preoccupied with a particular modality of the Real, one that insists on interrupting, limiting, or exceeding the various orders or agencies of the human mind. The implications of such a position are worth considering. For example, one must, as a consequence of holding this position, bracket questions pertaining to Things outside of the Symbolic and Imaginary psychical systems. Careful study shall expose the extent to which this position has infuenced each of the major felds inspired by Jacques Lacan: clinical psychoanalysis, radical political philosophy, and mathematics or topology. My task has been to explore the consequent occlusion which psychoanalysis has suffered in each of these three felds and to tease out the possibility of a return to the Real. Author Keywords: Alain Badiou, Anarchism, Hysteria, Jacques Lacan, psychoanalysis, Slavoj Zizek
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- Lipid-derived Thermoplastic Poly(ester urethane)s
- Thermoplastic poly(ester urethane)s (TPEU)s derived from vegetable oils possess inferior physical properties compared to their entirely petroleum-based counterparts due to the structural limitations and lower reactivity of the precursor lipid-derived monomers. The present work shows that high molecular weight of TPEUs with enhanced performance can be obtained from lipid-derived monomers via (i) the synthesis of polyester diols with controlled molecular weights, (ii) the tuning of the functional group stoichiometry of the polyester diols and the diisocyanate during polymerization, (iii) the degree of polymerization (iv) the control of the hard segment hydrogen bond density and distribution via the use of a chain extender and (v) different polymerization protocols. Solvent-resistant TPEUs with high molecular weight displaying polyethylene-like behavior and controlled polyester and urethane segment phase separation were obtained. Structure-property investigations revealed that the thermal transition temperatures and tensile properties increased and eventually plateaued with increasing molecular weight. Novel segmented TPEUs possessed high phase separation and showed elastomeric properties such as low modulus and high elongation analogous to rubber. The response of the structurally optimized TPEUs to environmental degradation was also established by subjecting the TPEUs to hydrothermal ageing. TPEUs exhibited thermal and mechanical properties that were comparable to commercially available entirely petroleum-based counterparts, and that could be tuned in order to achieve enhanced physical properties and controlled degradability. Author Keywords: Hydrothermal degradation, Molecular weight control, Polyester diols, Renewable resources, Structure-property relationships, Thermoplastic poly(ester urethane)s
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- On Tilt
- On Tilt: The Inheritance and Inheritors of Digital Games accepts and extends Eric Zimmerman’s contention that literacies currently being developed during video-game play will be more broadly applicable (outside games) in the next hundred years as Western work, education, entertainment, and citizenship spaces become ever more shaped like video games. To the end of better understanding both video games and the players and literacies contiguous with them, this dissertation interrogates comparisons between video games and... non-digital games, film and other fictional texts and worlds, blogs, casinos’ games of chance, and the strategies employed by face-to-face criminals, always asking about the roles and responsibilities the human participants in these systems take; that is, this dissertation investigates what video games inherit from other forms of art, including non-digital games, and what the gamers and audience of today and tomorrow inherit through their contact with video games. The dissertation examines in detail works by Jodi Dean, Bernard Suits, Bruce Sterling, T. L. Taylor, Walter Benjamin, Gavin de Becker, N. Katherine Hayles and Nicholas Gessler, and Katie Salen and Eric Zimmerman, considering their work, the video game, and gamers, in terms of power gaming, genre, fiction and suspension of disbelief, audience, motivations, fungibility, the zombie vs. the robot, value vs. meaning, agency, slipstream, capitalism, and ontology. Ultimately, the dissertation suggests that there are two disparate strains of gamification building Zimmerman’s future, arguing first that the penetration of video games into culture is changing the way we behave and exist as audience and more generally, and, second, that what is at stake, in terms of the attitudes, labels, and gameplay that we accept in terms of games and gamification is significant to what it means to be human, especially within systems that are only partly human, in the next hundred years. Author Keywords: digital, gamification, genre, literacy, new media, videogame
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- Long-Term Population Dynamics of an Unexploited Lacustrine Brook Trout (Salvelinus fontinalis) Population
- Long-term studies of demographic processes such as survival and abundance conducted in unexploited systems provide unique insight into the natural population ecology of fish, but are rarely available. I used historical tagging records of a sanctuary population of brook trout (Salvelinus fontinalis) in Algonquin Park, Ontario to investigate long-term population dynamics in an unexploited population. Adult brook trout in Mykiss Lake (23.5ha) were surveyed and tagged biannually (May and October) between 1990 and 2004. Open-population capture-mark-recapture models were used to test the importance of time, size, sex and season on estimates of apparent survival and abundance. Seasonal population growth and recruitment were estimated and compared with large-scale climate indices. Time-dependent survival and abundance estimates fluctuated, with distinct periods of increase. Population growth and recruitment were positively correlated with summer NAO and ENSO values, whereas survival was negatively correlated. Seasonally, larger individuals experienced higher apparent survival during winter and decreased survival during summer. These findings provide valuable insights into the natural demography of unexploited brook trout populations, and should help inform sustainable management of inland fisheries. Author Keywords: capture-mark-recapture, long-term, population dynamics, Salvelinus fontinalis, seasonal variation, survival
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- Representations of Aboriginal Health in the Media
- The goal of the present study was to explore the overall discourse within media articles regarding Aboriginal health issues. The present research aimed to answer the following questions: What Aboriginal health issues are being discussed in the media? How are Aboriginal health issues being discussed in the media? And, does the media propagate power imbalances between Aboriginal and non-Aboriginal Canadians? A thematic analysis was conducted, coopting aspects of Critical Discourse Analysis (CDA) to assess media content. Four CDA devices were used: overlexicalisation, structural oppositions, nominalizations and functional nominations, and concessions and hedging. Results suggest that while there are disparities in health outcomes between Aboriginal and non-Aboriginal Canadians, it is not widely reported in the media. The thematic analysis of 208 articles revealed patterns of stereotypical ideologies and negative framing appearing in media articles, the creation of an us versus them narrative, and themes of out of sight, out of mind, criminalizing Aboriginal Canadians, politicizing health, and access to health services. Author Keywords: Aboriginal Health, Communication, Health, Media, Psychology, Thematic Analysis
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- Active Neighbourhoods Canada
- This research considers the historic context of power that planning operates within, and looks at the ways in which certain community members are marginalized by traditional planning processes. Participatory planning, which has theoretical roots in communicative planning theory, may have the potential to shift the legacy of power and marginalization within planning processes, resulting in improved planning outcomes, more social cohesion, and a higher quality of urban life. I used a community-based research approach to evaluate approaches to participatory urban planning in Peterborough, Ontario. I worked with a community-based active transportation planning project called the Stewart Street Active Neighbourhoods Canada project. This thesis evaluates the participatory planning approaches employed in the project, and determines if they are effective methods of engaging marginalized community members in planning. The research also identifies the professional benefits of participatory planning, and examines the barriers and enablers to incorporating participatory approaches into municipal planning processes. Finally, I developed a set of recommendations to implement participatory planning approaches more broadly in the city of Peterborough, Ontario. Author Keywords: active transportation, communicative planning theory, community-based research, community engagment, participatory planning, public participation
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- An Analysis of Zoning By-laws and Urban Agriculture in the City of Peterborough, Ontario
- Urban agriculture (UA) is becoming increasingly prevalent in Canadian cities. Despite this municipal zoning by-laws often do not address UA explicitly. Using eleven interviews of urban agricultural participants a case study of the City of Peterborough’s zoning by-laws and the barriers they might present to UA was conducted. Research suggests that UA can provide many benefits to urban areas. The analysis found that the City of Peterborough’s zoning by-laws do not directly address UA. In order to enable the development of UA in the City of Peterborough its zoning by-laws will need to be redesigned to address and regulate UA directly. Author Keywords: By-laws, food systems, land use, municipal planning, urban agriculture, zoning
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- Robert Bringhurst and Polyphonic Poetry
- Robert Bringhurst states that polyphonic art is a faithful, artistic reflection of the multiplicity of the world’s ecosystems. This ecocritical perspective recognizes that human art informs our understandings of the world, and therefore artists have a moral obligation towards that world. In Chapter One I argue that mimesis should be reclaimed as a useful literary category since all art, regardless of intentions, has an effect on both culture and the natural world. In Chapter Two I argue that by reconnecting publishing craft and philosophy, our books can serve to bring us more in tune with the structures of the natural world. I conclude in Chapter Three by asking how a counterpublic consciousness can be cultivated, and how Bringhurst’s mission of transforming culture might be fully realized. Altogether, this view of literature offers an antidote to Western culture’s destructive tendencies towards the natural world. Author Keywords: Bringhurst, ecocriticism, mimesis, poetry, polyphony, typography
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- Sustainable Development
- While there is an emerging body of literature on the role and effectiveness of community-based research (CBR) in addressing the needs of local communities, few studies have explored its promise in areas lacking established collaborative models. The purpose of this paper is to examine the potential of CBR to meet the sustainable community development needs of the primarily urban Durham Region in Southern Ontario. Semi-structured interviews with twenty sustainability-focused community members from the academic, municipal, private and non-profit sectors were conducted using Glaser and Strauss' grounded theory to develop a working hypothesis that was analyzed with the aid of the qualitative data software program ATLAS.ti. The results reveal that while the region's academic and community groups have little time to initiate formal community-campus collaborations, the additional manpower and expertise that a well-structured CBR model provides could significantly assist local organizations complete unfinished projects and undertake new initiatives. Author Keywords: Community-based research, Community-campus collaboration, Cooperative education, Durham Region, Experiential education, Sustainable development
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- sustainability of Community-based Water supply Organizations (CWOs)
- The world has met the target of halving the number of people without access to improved-drinking water . However, the focus in rural areas (where 83% of the people without access to improved-drinking water live) has been on the construction of infrastructure, rather than on the strengthening of existing local institutions to create a long-term sustainable solution. This research aims to understand what are the necessary characteristics that CWOs, the main rural water supplier institutions around the world, must have to offer safe water continuously and in the long term. The results indicate that to offer such conditions, internal and external characteristic need to coexist. Those characteristics will emerge from case studies analysis in rural and peri-urban areas in Colombia, through interviews, surveys, document reviews, observation exercises, and a comparison with the literature. Internal characteristics include proper infrastructure conditions, user satisfaction, best management practices, social capital, be a development catalyzer, and environmental awareness. External characteristics include easy access to subsidies, efficient communication channels with authorities, continuous training, and environmental legislation/education. This study concludes that enforcing these characteristics will strengthen the existing institutions and can provide a sustainable solution for rural water supply issues. Author Keywords: community-based water supply organizations, costs, management, financial sustainability, rural Colombia, state subsidies, water tariffs
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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