Liste complète
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2015 — Sparse Coding Tone-Like Structures in Sound Using Local Image FeaturesRésumé
A trend in machine learning has emphasized the use of features which are learned algorithmically, in contrast to the hand-engineered features traditionally used in classification tasks. Classical sparse coding is a robust feature learning paradigm which represents inputs as a sparse vector of coefficients applied to a dictionary of basis functions. While sparse coding has yielded state-of-the-art results in many application domains, computational challenges often make it impractical to use. This thesis examines the application of a local image feature based sparse coding algorithm (ScSPM) to the problem domain of audio classification. The convex optimization problems involved in dictionary learning … Lire la suite
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2025 — Investigating the perception of Black adolescents of policing in Canada: An analysis of Kat Sandler 'Bang Bang' and Makambe Simamba 'Our Fathers, Sons, Lovers and Little Brothers'Résumé
The relationship between Black adolescents and policing is distraught, with historical and contemporary complexities that mirror broader patterns of systemic racism and social inequality. While studies in this area have explored the experiences of the adult population, the experiences of Black adolescents remain under researched and documented. To exacerbate the situation, the relatively sparse existing literature underscoring policing and Black adolescents identified survey methodology as predominantly used, posing a limitation , while also identifying historic al, media representation and social relationships as factors influencing Black individual perception of policing. This study suggests a shift to case study design , investigating … Lire la suite
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2021 — Corrosion Inhibition Performance of Methionine for CO2 Absorption PlantsRésumé
Inorganic corrosion inhibitors including heavy metals have been widely used in the carbon dioxide (CO2) absorption process for corrosion control. However, they are not environmentally friendly causing costly handling and disposal costs. This work therefore evaluated corrosion inhibition performance of an organic amino acid compound, namely Methionine (MTI) which is less toxic, more readily biodegradable, and has lower potential for bioaccumulation in aquatic organisms compared to common amine absorption solvents. The evaluation was experimentally implemented using electrochemical and weight loss methods. Carbon steel (CS1018) and 5.0 kmol/m3 Monoethanolamine (MEA) purged with 85% CO2 and 15% oxygen (O2) were used as … Lire la suite
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2024 — Fabrication of PLA-hemp 3D printing filamentsRésumé
This thesis focuses on the development and evaluation of polylactic acid (PLA) composites infused with hemp fibers for 3D printing applications. The project aims to leverage the intrinsic properties of hemp fibers and PLA to create a material that mitigates brittleness and enhances biodegradability while maintaining mechanical performance and printability. The methodology involves fabricating composite filaments from 2 mm PLA pellets and 0.4 mm hemp fiber particles. Hemp fiber at varying weight ratios (5 wt%, 10 wt%, and 15 wt%) was extruded using a single screw extruder. The optimal ratio was determined among these blends for maximum tensile and flexural … Lire la suite
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2024 — Application of density functional theory and machine learning in the prediction of efficient catalysts for the oxidative coupling of methane with reduced CO2 production at low temperatureRésumé
The oxidative coupling of methane (OCM) remains a promising means for the production of ethylene. Though high temperatures of 900 oC and above lead to increased conversion of methane, at higher temperatures, the OCM reaction tends to favour a competing reaction that leads to the production of COx product. This thesis focuses on the generation of catalyst component electronic properties via density functional theory (DFT) and the analysis via machine learning (ML) techniques of the combination of the DFT-computed electronic properties and high-throughput experimental data comprising 12708 data points. The DFT data includes the catalyst components' bandgap, Fermi energy and … Lire la suite
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2017 — Lithofacies properties, biostratigraphy, cyclicity and depositional environment of the Margala Hill Limestone, Hazara Basin, Northern PakistanRésumé
The Margala Hill Limestone is a carbonate-dominated unit that occurs in the Kalla-Chitta, Hazara and Potwar basins in north Pakistan. This study addresses the lithofacies attributes, depositional setting, cyclicity, biostratigraphy and, sequence stratigraphy of the Margala Hill Limestone in the Hazara Basin. In the study area, the formation has an average thickness of 80 m; it conformably overlies the Paleocene-Eocene Patala Formation and is conformably overlain by the Early Eocene Chorgali Formation. The Margala Hill Limestone consists of bioclastic limestone lithofacies with subordinate gray to brownish gray, thin marl interbeds. The limestones are commonly grey, weathering pale grey, fine-to medium-grained, … Lire la suite
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2015 — Effects of Oil Development on Grassland Songbirds and Their Avian Predators in Southeastern SaskatchewanRésumé
The quantity and quality of Saskatchewan’s remaining grassland may be threatened by energy development such as oil extraction. Grassland songbird populations are declining and increased oil development may be contributing to their declines through habitat loss and degradation. More quantitative research is needed to inform our understanding of how grassland songbirds are affected by oil development. I examined grassland songbird abundance, vegetation structure, habitat type (native and planted grasslands), and avian predator occurrence across a gradient of oil disturbance to determine the extent to which oil well proximity, density, and cumulative habitat disturbance influences the abundance of grassland songbirds and … Lire la suite
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2012 — Nurses and Their Work in Hospitals: Ruled by Embedded Ideologies and Moving DiscoursesRésumé
Nursing originates from societal beliefs about women‟s roles of self-sacrifice and obedience situated within a history of patriarchal control. Unfortunately, these ideologies continue to influence and shape nurses‟ work in hospitals. Within the literature, several dominant discourses construct hospitals and nurses‟ work in hospitals as chaotic and challenging while nurses are conceptualized as stressed and fatigued. Overcrowding, increasing patient acuity, budget constraint, and chronic understaffing are only some of the issues nurses face in their every day and night work. Because of these problems, nurses are expected to care for patients in the hallways; manage with minimal staffing; and simply … Lire la suite
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2020 — SEATBELT: An Integration of Mixed Abilities and Performance and PracticeRésumé
This paper is a critical engagement with scholarly research, my thesis play and performance, and personal experience as an actor and artist living with disability. My thesis reflects the influence inequality and segregation within society have on artists with disabilities who so often have to work in ableist performance systems with able-bodied artists. My research focused on finding the best methods to reach integrated performance. There is a negative perception that lingers with the association of disability culture and professional performance. In my arguments, I include disability arts activists, such as Simi Linton and Petra Kuppers, because they speak to … Lire la suite
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2013 — Experimental and Thermodynamic Studies of Ionic Liquids for Carbon Dioxide SeparationRésumé
Capturing greenhouse gases and preventing climate change are becoming imperative global issues. There is a growing awareness that carbon dioxide emission from fossil fuel combustion is the biggest contributor to this environmental phenomenon. One of the most effective and potential solutions of reducing carbon dioxide emission is to capture it from industrial gas streams, such as flue gases. Among the most commonly used technologies, gas absorption via chemical solvent is the most promising technology due to its capacity to handle a large volume of carbon dioxide. Nevertheless, aqueous alkanolamines have shortcomings that make the process costly and environmentally unfriendly. Recently, … Lire la suite
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2020 — La Loi sur les langues officielles 1969: Réactions dans le Regina Leader PostRésumé
This study is about the reactions of anglophones in Saskatchewan to the Official Languages Act of 1969. This study is based on a systematic analysis of 132 articles published in the Regina Leader Post between 1968 and 1969. The objective of this research is to identify the factors that influenced the opinions of anglophone Canadians in Saskatchewan to the Official Languages Act and to determine the role that the Regina Leader Post played throughout the debate on the Official Languages Act between 1968 and 1969. This study established that the actors of the debate on bilingualism were influenced by many … Lire la suite