Liste complète
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2021 — Surviving and Thriving as a Teacher: Exploring the Emotional Management Struggles and Strategies of TeachersRésumé
The purpose of this study was to explore the struggles teachers face when they first encounter the emotion work in teaching. Furthermore, I explored the strategies they had to develop to healthily manage this work. In this way, teachers are not just surviving, but thriving, in their role. To achieve this, I used a combined methodology of an auto-ethnography to explore my own lived experiences and empathetic semi-structured interviews with five other teachers. The main findings are categorized into struggles and strategies. Participants identified their struggles with the emotion work as the emotions of stress, anxiety, and caring. The emotion … Lire la suite
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2021 — Estrogen and Cognitive Functioning in the Menopause TransitionRésumé
Most women report cognitive problems in the menopause transition (i.e. ‘perimenopause’), which refers to the five or so years preceding the final menstrual period. Chief concerns allude to forgetfulness, fuzzy thinking, poor working memory, and poor concentration. Although it has been proposed that the hormonal changes associated with the menopause transition may be a contributing factor, very little research has been devoted to studying the effect of reproductive hormones on cognitive functioning during this transition period. The goal of this study was therefore to improve our understanding of the role that reproductive hormone changes play in triggering perimenopausal cognitive difficulties. … Lire la suite
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2021 — Transmisogyny and the Abjection of GirlcockRésumé
This thesis seeks to construct a theoretical framework around transmisogyny, the intersectional violence and marginalization faced by trans women, trans fem(me)s, and non-binary people assigned male at birth. I explore the ways in which disgust, fear,and anxiety around trans women's bodies, centered around the potential existence of a trans woman's cock (which I call girlcock, and which can be corporeal, or imaginary, as in the case of trans women who have had genital surgery, or who otherwise do not have a penis) casts them as abject - dirty, placeless, and beyond the horizon of discourse. I explore this placelessness in … Lire la suite
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2021 — Expansion of Invasive Prussian carp (Carassius gibelio) into Saskatchewan, Canada: Current Distribution and Food-web Reconstruction Using Stable IsotopesRésumé
The Prussian carp (Carassius gibelio) is one of the most invasive fish species in Europe and was recently introduced into North America. This species was introduced into Alberta waters in the early 2000s and its range has subsequently expanded. In 2018 an established population of Prussian carp was discovered in Saskatchewan for the first time. In response to this discovery, I undertook the first study of this invasive fish species in Saskatchewan. I used a combination of field studies and citizen science reporting to conduct surveys for Prussian carp in Saskatchewan. I also used stable isotopes analysis of Prussian carp … Lire la suite
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2021 — Analysis of Model Aggregation Techniques in Federated LearningRésumé
Federated learning is a distributed machine learning method that enables model training on client devices, which protects the privacy of user data. In federated learning, instead of passing clients’ data to a server, clients generated models are transferred to the central server, which in turn aggregates all models into a global model. The global model then goes back to clients and continues the same process to improve model performance. We proposed three central server model aggregation techniques namely, all model averaging (AMA), one model selection (OMS), and best models averaging (BMA) in this thesis. We adopted neural network models in … Lire la suite
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2021 — Solubility of Carbon Dioxide and Ethane in Promising Methylimidazolium-Based Ionic LiquidsRésumé
Limiting the emissions of carbon capture is one of the most important environmental issues facing humanity today. Carbon capture is also of great importance in the area of natural gas sweetening. In this work, the solubilities of CO2 and C2H6 in three promising ionic liquids {1- Hexyl-3-methylimidazolium bis(trifluormethylsulfonyl)imide [HMIM][Tf2N], 1-Butyl-3- methyl-imidazolium dimethyl-phosphate [BMIM][DEP] and 1-Propyl-3- methylimidazolium bis(trifluoromethyl-sulfonyl)-imide [PMIM][Tf2N]} were measured at (303.15, 323.15 and 343.15) K and at pressures up to 1.4 MPa using a gravimetric microbalance. The densities of the three ionic liquids were also measured at temperatures ranging from (293.15 to 343.15) K at atmospheric pressure. From the … Lire la suite
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2021 — Performance Analysis of Received Signal Strength Indicator-Based Localization for Underground MinesRésumé
Wireless sensor networks (WSNs) have been implemented in a variety of scenarios, including tracking, smart grid, and equipment monitoring. Often times, devices in WSNs are required to know their locations with respect to other devices in the network. This act, known as localization, is the art of predicting the location of a device using anchor devices with known locations in the same network. Localization is essential for many critical industrial applications including underground mines, as the location of devices and employees is vital in helping to guarantee the safety of mining personnel. To the best of our knowledge, existing works … Lire la suite
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2021 — Becoming Anti-Oppressive Educators in Open, Online Spaces: Pre-Service Teachers' Perceptions of Digital Identity and Social JusticeRésumé
This dissertation presents key understandings and conclusions drawn from my research into teacher candidates’ perceptions of digital identity, particularly as it relates to the process of becoming anti-oppressive educators. The results of this study provide the beginning of an answer to the following question, which I see as a critical point of inquiry in our increasingly digital world: As institutions of higher education experiment with blended and online learning models, how will these new learning spaces support or hinder the work of anti-oppressive education? The study traces a series of critical conversations with seven students enrolled in a four-year teacher … Lire la suite
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2021 — Restorative Justice, Apology, Restitution, and ForgivenessRésumé
Operating from a retributive approach, the current criminal justice system (CJS) often does not appear to value the well-being of victims. As an alternative approach, restorative justice values the well-being of victims and provides opportunities that can foster forgiveness compared to a retributive approach. London (2011) has linked the importance of forgiveness to the emotional and psychological well-being of victims. Using London’s (2006; 2011), this research aims to provide insight into what factors affect an individual’s willingness to forgive an offender. In doing so, this may improve and expand on how the Canadian CJS is able to serve the needs … Lire la suite
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2021 — Les technologies de l’information et de la communication dans l’apprentissage du français au NigeriaRésumé
The learning of French as a foreign language has been influenced by Information and Communication Technology (ICT) in recent years. Some technologies became absorbed into emerging new ones, while others were born as a result of societal demands. With this current reality, the place of ICT in learning French as a foreign language has become inevitable. These recent developments are however hardly visible in Nigeria, a country where pedagogical practices, especially with regard to ICT, are affected by constraints such as lack of adequate technological equipment and poor practices of integrating multimedia. These problems do not give rise to innovative … Lire la suite
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2021 — Canadian Matchmakers: How Early 1900s Colonial Racist Policies United Indigenous Women and Chinese Bachelors on the PrairiesRésumé
Canadian government legislation implemented policies in the early 1900s that facilitated inter-racial marriages between Indigenous women and Chinese bachelors. Foreign workers were over-recruited from China, to migrate to Canada, to support the development of the railway system. To deal with this "perceived" over-population Canada began implementing racist policies that included intentional deterring of Chinese men from bringing their families with them to Canada. My research focuses on the consequences of these racist policies designed to keep Canada a white, British nation. This narrative inquiry qualitative research includes two participants’ who are descendants of these marriages. Using an Indigenous feminist and … Lire la suite
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2021 — Mass Transfer of Alkane Solvents-CO2-Heavy Oil Systems in the Absence and Presence of Porous Media Under Reservoir ConditionsRésumé
For a thin heavy oil reservoir where thermal methods are not applicable due to heat loss to over- and under-burdens, gas injection is considered to be an effective alternative. One of the major mechanisms associated with gas injection is the molecular diffusion of dissolved gas(es) which reduce the viscosity of heavy oil while inducing oil swelling. Physically, addition of a less volatile gas to a more volatile gas enhances both viscosity reduction and oil swelling, while the presence of porous media complicates such mass transfer processes. Diffusivity of dissolved gas(es) in heavy oil is often estimated as a constant, while … Lire la suite
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2021 — Covid-19 (Coronavirus) Disease Diagnosis Using Fuzzy Inference SystemRésumé
Intelligent Systems (IS) are called technologically advanced machines. IS includes a variety of techniques that can deal with uncertainty and complex problems. This research study aims to diagnose the coronavirus (COVID-19) diseases symptoms using an Intelligent Systems approach. The COVID-19 epidemic is currently one of the most deadly diseases in the world. The pandemic has affected human life and global economy adversely at a large scale. It is spreading rapidly through humans, causing severe health issues and death worldwide. This virus affects different people in different ways. A large number of people are not aware of being infected with COVID- … Lire la suite
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2021 — Lean 4.0: Case Studies and Development FrameworkRésumé
A fast-paced evolving environment gives rise to many needs; hence the supply and demand also need to be fast-paced. To equip industries to manage the quick and continuous changes in supply and demand, principles or tools like Lean and Industry 4.0 technologies are used. Lean is the process of adding value to a process or a product, by eliminating wastes from the product process chain. Industry 4.0 is the fourth revolution of the industry which has evolved from the technologies of steam engines, computers to the present-day technologies such as Internet of Things, Big Data, Artificial Intelligence, Additive manufacturing, etc. … Lire la suite
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2021 — Magnitude and Regulating Factors of Carbon Dioxide, Methane, and Nitrous Oxide Concentration From Natural and Constructed Agricultural Waterbodies on the Northern Great PlainsRésumé
Greenhouse gases (GHGs), including carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), are increasing in concentration in the atmosphere. This poses a risk to the planet due to the radiative forcing of these gases which is ultimately leading to climate change. Inland waters across the globe, specifically lakes, rivers, and wetlands, are important sources, and occasional sinks, of GHGs to the atmosphere, due to the natural biogeochemical processes happening in these waterbodies. Understanding the contribution of these systems to the global GHG budget and the processes regulating the GHG emissions is important, as it helps to understand how these … Lire la suite
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2021 — The Influence of Weather, Time of Season, and Time of Day on Bullsnake (Pituophis atenifer sayi) Thermoregulation and Habitat SelectionRésumé
The grasslands of Western Canada are exposed to one of the most variable terrestrial climates on Earth. Ectothermic reptiles such as the bullsnake (Pituophis catenifer sayi) must respond to this variation by altering their behaviour over daily and seasonal scales. In Chapter 2, I addressed questions regarding the extent to which bullsnakes thermoregulate. I examined how body temperatures (Tb) varied with available operative temperatures (Te) over an active season at a site in southwestern Saskatchewan, Canada. Bare ground Te was variable (x̄ min = 9.3, x̄ max = 31.4°C) and was outside voluntary limits (15 – 35°C) 45 % of … Lire la suite
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2021 — A Riparian Buffer at 10 Years: The Effect of Black Plastic Mulch on Soil Variables, Nutirent Stocks and Tree BiomassRésumé
Riparian zones are the interface between terrestrial and aquatic ecosystems. Riparian buffers are an important component of this interface environment because the vegetation of the buffer can provide many ecosystem services. Establishing riparian buffers on agricultural land can help reduce agricultural pollutants such as excessive nitrogen and phosphorus, but also provide opportunities to sequester carbon and produce biomass. Sampling was done after 10 years of growth in a riparian buffer of five tree species, hybrid poplar (Populus × canadensis), red ash (Fraxinus pennsylvanica), bur oak (Quercus macrocarpa), red oak (Quercus rubra) and white pine (Pinus strobus) to measure the long-term … Lire la suite
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2021 — Developing a synthetic organophosphorus-based disinfectant for Canadian chicken hatcheriesRésumé
The spread of bacterial pathogens within chicken hatcheries is a growing concern. Enterococcus cecorum is a bacterium that causes infection of the chicken respiratory system and in some cases the spine, often requiring farmers to cull a portion of their flocks. Disinfectants used in hatcheries are effective, yet pathogens like E. cecorum remain problematic for both producers and hatcheries. A library of synthetic organophosphorus compounds possessing antimicrobial activities were evaluated as disinfectants for use in chicken hatcheries. After evaluating compounds 9bWC2, 9bWC3, 9cWC2, 9cWC3, and 10bW in combination with the solvents ethanol, isopropanol, dimethyl sulfoxide, and tetrahydrofuran, compound 10bW dissolved … Lire la suite
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2021 — On the Hypothesis Testing Procedure for Both Parameters of the Binomial DistributionRésumé
The main purpose of this thesis is to perform the hypothesis tests of parameters p and m (both are unknown) of the binomial distribution. Delta method and the moment generating function are used to derive the important statistic X_2^2 (p,m) for the hypothesis testing based on its asymptotical distribution. The probability of type I error and the power of the test are calculated, which are the main parts of this research. For the hypothesis testing, we consider the null hypothesis H_0:p=p_0,m=m_0 with a significant level α=0.05. The rejection region was considered to be: X_2^2 (p_0,m_0 )>χ^2 (α), where χ^2 … Lire la suite
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2021 — WAH WAH ŠIKWA ONŌSIHSAH: NAHKAWĒWIN REVITALIZATION THROUGH LIVED EXPERIENCESRésumé
This study explores Nahkawēwin language revitalization. This study draws on the language nest model, which first originated with Maori grandmothers and their grandchildren. In this study, my mother and I created a mini language nest in both of our homes to teach my children the gift of their language, Nahkawēwin. My research was guided by three questions: 1) How will language nests help my family and my community? 2) What are the challenges for using a language nest for Indigenous language revitalization? and 3) How can Elders, lodges and homes be agents and sites of Indigenous language revitalization? In answering … Lire la suite
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2021 — A Fuzzy Inference Systems Approach Based on CBC Parameters for the Diagnosis of LeukemiaRésumé
Leukemia is one of the fatal cancers worldwide with ambiguous symptoms and higher mortality rates. In the ranking of cancerous diseases that cause death, leukemia is ranked in the 6th position. The average 5-year survival rate of leukemia around the world is 61.4%. The Globocan 2020 report published the total number of new leukemia cases worldwide was 474,519 and the total number of death all over the world for leukemia was 311,594 in 2020. As the initial screening of leukemia is complex and the specific medical examinations are costly, the majority of leukemia patients are diagnosed at a stage of … Lire la suite
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2021 — English Language Policy and Planning in Bangladesh: My Lived ExperienceRésumé
This language policy study examines the English language planning and policy of Bangladesh, a South Asian country with a long history of British colonization. Roughly 95 to 99 per cent of Bangladeshis speak বাাংলা (bangla)/Bangla as their national language but their level of literacy is routinely measured by their English knowledge. During 200 years of colonial rule, English was legislatively imposed as the language of schooling. Since gaining independence in 1971, Bangladesh continues to uphold the place of English in education. This practice produces inequitable access to education. In light of this reality, this doctoral research explores the historical and … Lire la suite
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2021 — Statistical Summary Representations in Identity Learning: Exemplar-Independent Incidental RecognitionRésumé
The literature suggests that ensemble coding (i.e., the ability to represent the gist of sets) may be an underlying mechanism for becoming familiar with newly encountered faces. I tested the plausibility of this suggestion using a new paradigm that involves incidental learning of target identities interspersed among distractors. The participants were trained on unfamiliar targets that were presented among intervening distractors while rating the attractiveness of the faces. The participants were then given a test to measure their familiarity with the targets. The results revealed that recognition of a target’s face was superior when the face was the average of … Lire la suite
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2021 — Mother Tree Optimization for Solving Continuous and Discrete Optimization ProblemsRésumé
Continuous and discrete optimization problems play a signi cant role in di erent academic and industrial disciplines. The main objective of a constraint optimization process is to nd a solution for a problem, that satis es a set of constraints while optimizing a given objective function. The exact or mathematical methods can guarantee the solution if one exists; however, these methods su er from their exponential time cost. Thus, metaheuristic methods have been introduced as e cient approximation approaches for solving real-world optimization problems in a reasonable time frame. In addition, there are always new hard problems that need a … Lire la suite
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2021 — Investigating the Relationship Between Problematic Smartphone Use, Intolerance of Uncertainty, And MindfulnessRésumé
Problematic smartphone use (PSU) describes subjective distress, impairment, and/or negative consequences in important areas of functioning due to an inability to regulate smartphone usage (Billieux, 2012; Merlo et al., 2013). PSU is correlated with several mental health concerns, including symptoms of depression, anxiety, and perceived stress (Demirci et al., 2015; Elhai et al., 2017; Elhai et al., 2019; Samaha et al., 2016). Intolerance of uncertainty (IU) is related to numerous anxiety-related disorders (Carleton 2016a, 2016b) and may be a transdiagnostic cognitive mechanism relevant to PSU. A statistically significant increase in IU and smartphone usage from 1999 to 2014 suggests a … Lire la suite
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2021 — Tuning Techniques for Microwave Devices Based on Space Mapping and Surrogate ModelingRésumé
In a modern wireless communication system, with the development of various applications, microwave filters with stringent specifications and tunability start to receive more attention. Advances in novel materials, fabrication techniques, filter structures, tuning techniques, full-wave electromagnetic analysis methods, and computer-aided (CAD) design tools are proposed and delivered in the past 20 years. A designer can accurately model, simulate and optimize a filter structure with the use of different commercial software. Nevertheless, the experimental results from a fabricated filter usually give different performance compared to theoretical models and electromagnetic (EM) simulations due to many kinds of variations like fabrication process variation, … Lire la suite
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2021 — Modeling of Enhanced Heavy Oil Recovery Processes: Foamy Oil Flow and Viscosity FingeringRésumé
Many heavy oil reservoirs are now developed by enhanced heavy oil recovery methods, such as solvent-based recovery techniques. The solvent-based recovery techniques have advantages in energy effectiveness, cost efficiency, and environmental benefits compared with other methods. In the application of solvent-based recovery techniques, many types of solvent are available, including methane (C1), propane (C3), carbon dioxide (CO2), and solvent mixture. Foamy oil flow is considered an essential mechanism and has been extensively studied. For each heavy oil-solution gas system, the flow behavior is unique, and a systematic study is necessary to understand the foamy oil mechanism better. Previously proposed simulation … Lire la suite
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2021 — Bismuth Tungstate Photocatalysis for N-Nitrosamines Removal from Amine Washing WastewaterRésumé
The most practical way of reducing industrial carbon dioxide (CO2) emissions, which is the main contributor to global warming, is post-combustion CO2 capture using amine solvents. A large variety of degradation products are generated during the CO2 capture process. This is mostly due to amines reacting irreversibly with CO2, and other oxygenated compounds in the flue gas. Amine degradation products poses threat to human health and marine life. Amine degradation products like N-nitrosamines are carcinogenic and mutagenic. The formation of carcinogenic and mutagenic N-nitrosamines can obstruct the technology's industrial application. To reduce the impact on human health and marine life, … Lire la suite
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2021 — A Risk Management Framework to Increase Success of IT ProjectsRésumé
Companies around the globe continually seek to improve the quality of services to realize their primary mission and increase their success, branding, and profit. Based on strategic planning, they compete fiercely in their markets to accomplish a remarkable outcome about their commercial growth. When a company devises a new idea, it is launched to execute it. A project refers to planning and executing structured tasks by qualified personnel with clear goals, a specified schedule and budget, and an initial establishment of controls and indicators to assess the results achieved compared to expected. Here, project management becomes a critical path and … Lire la suite
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2021 — Can Cognitive Behavioural Techniques Reduce Exercise Anxiety and Improve Adherence to a Resistance Training Program for People with Anxiety-Related Disorders?Résumé
Anxiety-related disorders (ARDs) are highly prevalent and associated with substantial functional impairment, including poor health outcomes and economic burden. Exercise is a cost-efficient alternative to other treatments for ARDs (e.g., psychotherapy, pharmaceutical) that is also associated with health benefits. Several exercise modalities, including resistance training (RT), have demonstrated efficacy at reducing symptoms of ARDs; however, there are challenges associated with effectively implementing such protocols, most notably, exercise avoidance or early discontinuation. Researchers have identified exercise anxiety (i.e., exercise-related worries, fear of exercise-related physical sensations, and anxiety-driven exercise-related behaviours) as a contributor to exercise avoidance for people with ARDs. Consequently, exercise-based … Lire la suite
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2021 — An Investigation of Engagement in Parent-Administered, Internet-Delivered Cognitive Behaviour Therapy for Childhood Anxiety: Intervention Usage and Subjective ExperienceRésumé
Childhood anxiety is the most prevalent mental health concern facing Canadian children but often goes untreated. Parent-administered, Internet-delivered cognitive behaviour therapy (ICBT) has been suggested as an approach to improve treatment access. For this approach to be effective, however, it is important to ensure that parents will use and remain engaged with the treatment intervention. ICBT researchers frequently include measures of engagement in efficacy studies, but the measures tend to be uni-dimensional and inconsistent across studies. Perski, Blandford, West, and Michie (2017) developed a conceptual model of engagement, designed to address limitations in the literature by capturing two broad dimensions … Lire la suite
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2021 — Consuming the Counterculture: The Evolution of Products and Advertisements in 1960s AmericaRésumé
Consumer-culture in 1960s America changed dramatically from previous decades. As highlighted by scholars such as Thomas Frank, a Creative Revolution occurred within advertising and consumer-culture during the decade. Concurrently, organizations filled with America’s youth, such as the New Left and the counterculture, sought social and cultural change. The emergence of the hippies from within this young generation also caused a shift within American advertising strategies. This thesis analyzes advertisements from a variety of mainstream and underground print media publications from 1960 to 1973, to understand how, and how often, themes of hippiedom were co-opted in order to both sell products, … Lire la suite
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2021 — SeventeenRésumé
Indigenous arts-based research has led me to emotionally challenging places, but also to regeneration, self-discovery, reclamation, community, kinship, and a greater understanding of Indigenous cultural knowledge. My research is centred on personal experience, whether it is reflecting on childhood trauma or engaging in Indigenous ways of knowing and doing through traditional art practices. My primary research focusses on the pursuit of Indigenous knowledge and applying that knowledge to my art practice. The thesis exhibition, Seventeen, collects and preserves the memories and knowledge my father instilled in me as a child. My father was a survivor of the Lebret (Qu’Appelle) Indian … Lire la suite
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2021 — Model for Predicting Failure Probability in Boiler HeadersRésumé
Pressure headers are a critical part of coal-powered power plant. The different modes of failure depend on the part of the plant operating parameters including its temperature. Low temperature headers are normally affected by erosion-corrosion and fatigue, while the high temperature headers are normally affected by creep and fatigue or an interaction of the mechanisms. Due to the constant deterioration during operation, having a tool that can predict the current state of the header based on operational information that is readily available to the operators is valuable. The objective of the thesis is to develop a methodology to predict the … Lire la suite
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2021 — Coordinated Integration of Distributed Energy Resources in Unit CommitmentRésumé
Distributed energy resources (DER), such as electric vehicles (EV) and roof-top solar panels have become increasingly popular and essential components of power distribution systems. However, their growth poses signi cant challenges to system operation, such as bidirectional power ow, intermittent power generation, increased peak demand, and unexpected frequency/voltage uctuation. In order to tackle these challenges, we developed a vehicle-to-grid (V2G) model, which incorporated dynamic EV usages, such as driving times, driving distance, and charging/discharging locations. In addition, solar forecasting models such as XGBoost, random forest, and arti cial neural networks were developed. We also developed a framework to evaluate and … Lire la suite
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2021 — A Settler Colonial House of Mirrors: Understanding My Moral ArchitectureRésumé
The goal of my research was to reveal inherent and ingrained settler colonial orientations within my moral architecture. Through an autoethnographic research framework, I encountered my upbringing within colonial structures paying attention to the evolution of my awareness and my emerging thoughts. Self-reflection, self-observation, double-entry journals, and counternarratives embedded in relational learning and story supported me to understand my entanglement as a non-Indigenous educator whose white privilege is established and maintained by systemic racism. Working in the very colonial structures I aim to contest, I revealed enduring tensions within my social locations of colonizer perpetrator and colonizer ally. I surfaced … Lire la suite
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2021 — Spatial Distribution and Structural Analysis of Vents in the Anivorano Volcanic Field, Northern MadagascarRésumé
The purpose of this research thesis is to investigate the relationship between the spatial distribution of Neogene-Quaternary volcanoes and the underlying geological structures in the Anivorano Volcanic Field (AVF), northern Madagascar using remote sensing techniques. Understanding the interplay between continental monogenetic volcanic fields and tectonic features in an extensional regime is very important in unraveling the genesis and development of continental rifts. This study focuses on the analysis of the geomorphology, morphometry and spatial distribution of mafic volcanoes in the AVF; and the relative contribution of tectonic processes and pre-existing crustal structures to the formation of the AVF. One hundred … Lire la suite
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2021 — Critical Action Research: How One School Community Lives Out The Truth and Reconciliation Commission's Calls to ActionRésumé
Five years after the final report of Canada’s Truth and Reconciliation Commission (TRC) was issued, the TRC still plays a fundamental role in the development of how Canadians understand the colonial violence perpetrated upon Indigenous peoples. However, through this research project, the need to (re)story the history of Canada and its relationship with Indigenous peoples became apparent. This study traces the year-long journey of our teacher research team, which is made up of four participants and myself, as we engage in Critical Action Research (CAR) to advance Call to Action #63 (iii), which implores the education sector to “[b]uild student … Lire la suite
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2021 — Screening of Potential Polyamine Solvents for Carbon CaptureRésumé
Carbon dioxide (CO2) is one of the main greenhouse gases that significantly contributes to global warming. It is therefore imperative to reduce the amount of CO2 emissions into the atmosphere. Among CO2 capture sorbents, liquid amines have been used commercially as they have high capacities for CO2 as well as fast reaction rates. The purpose of this research work is to screen novel promising amines which can be used at an industrial scale for CO2 capture from natural as well as flue gas streams. Ideally, potential amines should have a high kinetic rate, high CO2 solubility and low regeneration energy. … Lire la suite
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2021 — Systematic Approach to Degradation Studies in Catalyst Based Amine CO2 Capture ProcessRésumé
The effects of climate change have attracted concern globally which has led to an increase in research focused on diverse plans and technologies for mitigation. The use of solid catalyst in an amine based post-combustion CO2 capture (PCCC) has become a very attractive option as developments are actively ongoing to address some of the challenges that the conventional capture system faces. This research work evaluated the role that a new super acid, proprietary desorber catalyst (PDC) catalyst has on the amine degradation rate using a formulated optimum 4M DMAE/AMP equimolar blend in a full cycle bench scale CO2 capture pilot … Lire la suite
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2021 — Le droit à une éducation de qualité? Une étude comparative de l’expérience des filles autochtones au Nigéria et au Canada, 1850- 1960Résumé
Dans la mesure où les gens se reproduisent et que les enfants sont élevés et nourris, le besoin d'une éducation fonctionnelle devient évident. Le niveau de vie de toute personne peut varier en fonction de l'accès équitable à une éducation de qualité. Le Nigeria et le Canada ont un héritage historique commun (anciennes colonies du Commonwealth britannique). Ce sont tous deux des sociétés multiethniques avec un passé colonial similaire. Les peuples autochtones du Canada et du Nigeria ont tous deux une histoire traditionnelle et des cultures uniques, et leur éducation traditionnelle est très similaire. Pourtant, aucune étude comparative de l’éducation … Lire la suite
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2021 — Production of Furfural From Lignocellulosic Biomass Using Sulfonated Carbon-Based Solid Acid CatalystsRésumé
There is an aching desire to desist from the use of fossil fuel energy sources due to their major contribution to environmental degradation. Hydro, wind, and solar energy may serve as the much-needed alternative energy supply sources to fossil fuels however biomass will be the major alternative source for platform chemicals. Furfural is one of the 12 leading value-added chemicals identified by the US Department of Energy (DOE). It is of importance in the industrial sector, having applications such as; the removal of aromatics from diesel fuel and lubricant refining, and being a platform chemical from which a vast number … Lire la suite
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2021 — Universality of Weyl UnitariesRésumé
Weyl's unitaries are p×p unitary matrices given by a diagonal matrix having primitive p-th roots of unity as its entries and a cyclic shift matrix. The Weyl unitaries, which we denote by u and v, satisfy u^p= v^p=1_p(the p×p identity matrix) and the commutation relation uv=ζvu, where ζ is a primitive p-th root of unity. In this work, we prove that the Weyl unitaries are universal in the sense that if u and v are any d×d unitary matrices such that u^p=v^p=1_d and uv=ζvu, for some ζ, then there exists a unital completely positive linear map Φ:〖 M〗_p (C ) … Lire la suite
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2021 — Technical and Vocational Education and Training (TVET) in Nigeria: A Genealogical Inquiry into the Inferior Positioning of TVETRésumé
Technical and Vocational Education and Training (TVET) has a role to play in addressing unemployment and poverty; however, for too long, this sub-sector has been overlooked. Educators and policy makers in Nigeria often view TVET as a sub-sector for those who were incapable of pursuing academic programs; thus, resulting in TVET being viewed as low status by students and the public. In contrast, education and training in the old African society were very functional and met the needs of the society. A review of literature on traditional African education reveals that education in the old African society was vocational in … Lire la suite
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2021 — Simplicial Enrichment of Chain ComplexesRésumé
In this thesis we will study two simplicial enrichments of chain complexes which are obtained using the Dold{Kan correspondence. The two enrichments are different, but we show that they are naturally homotopy equivalent to each other. We also give an explicit combinatorial formula for the smaller of the two enrichments. Lire la suite
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2021 — Efficient and Robust Methods for Computing Trust in Multi-Agent SystemsRésumé
In systems with multiple potentially deceptive agents, any single agent may have to assess the trustworthiness of other agents in order to decide with which agents to interact. To evaluate the trustworthiness of an agent in a multi-agent system, one often combines two types of trust information: direct trust information derived from one’s own interactions with that agent, and indirect trust information based on advice from other agents. Since the advisors themselves may be deceptive or unreliable, agents need a mechanism to assess and properly incorporate advice. In this thesis, we evaluate existing state-of-the-art methods for computing indirect trust in … Lire la suite
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2021 — Assessing Biochar Effects on Natural Fiber-Ground Tire-Agriculture Plastic CompostiesRésumé
Globally, the increasing population, urbanization and industrialization produces excessive waste. Plastics from consumer products, rubber from tires, and other organic waste from forestry and agriculture are accumulating faster than they can decompose. Presently, plastic production exceeds 8300 million tonnes, of which ~55% ends up in landfills. Annually, ~1 billion waste tires are generated with only 100 million tires being recycled. However, awareness and government regulations, like the Canada Zero Plastic Waste Strategy to be achieved by 2030, focusses on reduction and reutilization of waste streams. The research reported herein seeks to contribute by assessing composite that utilize waste streams. The … Lire la suite
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2021 — Adaptive Quality of Service and Trust Based Lightweight Secure Routing Algorithm for Dense Wireless Sensor NetworksRésumé
Wireless Sensor Networks (WSNs) are group of wireless devices that are deployed in an adhoc manner and are generally left unattended. The main advantages of WSNs are that they are simple to use, allow the use of inexpensive sensor nodes, and have good scalability. WSNs are useful in object tracking, periodic monitoring, and event detection applications. However, the inherent characteristics of the WSNs, such as limited resources and low computation, make them vulnerable to various types of security attacks. Therefore, security mechanisms are needed to secure the network and protect against various security attacks. Conventional security mechanisms, such as cryptography … Lire la suite
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2021 — Neural Network Music Genre ClassificationRésumé
Music recommendation systems have become popular in recent years with the increasing variety of music content being produced as well as the sheer size of digital music collections which are available at the touch of a finger. Large collections of digital music are commonly organized using genre labels. In addition, music genres are regularly used by recommendation systems to suggest new music to the listeners. The chore of classifying a large amount of music manually can be difficult and time consuming. It is for these reasons, the automatic classification of music by genre is a crucial task. The ability to … Lire la suite
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2021 — Pore-Scale Imbibition Studies for Tight Rock SystemsRésumé
Imbibition pervasively exists in many natural and industrial processes, such as oil/gas recovery, hydraulic fracturing, the postinjection stage of CO2 sequestration, printing processes, diagnostic tests in biomedicine. As a dominant mechanism in tight formations, imbibition has been extensively studied across scales to support world energy demands and environmental requirements of carbon neutrality. Many studies indicate that macroscale performances, like the displacement front instability and residual saturation of the non-wetting phase, highly depend on flow behaviors at the pore-scale level. Despite the importance of pore-scale imbibition processes in tight rocks, many previous studies have been conducted lack considering typical pore-throat features … Lire la suite