Liste complète
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2016 — Inventory Policy Optimization of a Three-Echelon Supply Chain: A Meta-Modeling ApproachRésumé
The competitive and dynamic nature of today’s marketplace as well as continuing trend in global outsourcing is promoting complex supply chains with high inventory cost. A major challenge in finding the optimum inventory policy in such systems is that determining the mathematical relationship between the total inventory cost (TIC) and decision variables such as order point and order quantity suffers from great mathematical complexity. In this study, optimization of a three-echelon inventory system using meta-modeling approach is considered. Accordingly, TIC values for different sets of decision variables are estimated using experimental design and simulation. Next, in order to overcome the … Lire la suite
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2015 — Applications of Silicon Photomultipliers in Personal Radiation Detection and Nuclear ImagingRésumé
Originally developed as the readout for calorimeters in high-energy physics experiments, the silicon photomultiplier (SiPM) has found use in a wide range of fields requiring the detection of low-intensity light. This thesis discusses work on two such applications: in the development of a prototype personal radiation detector (PRD), and in the imaging of a radioactive source. The ability to detect above-background levels of radiation has received increased attention in recent years, not least from the perspective of national security agencies in, for example, tracking the movement of illicit radioactive materials, or in dealing with potential fall-out from nuclear accidents. In … Lire la suite
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2021 — The Rhythm of My HeartRésumé
This study explored music education outside of a public-school context. The intent of the study was to gain an understanding of the learning experiences of two professional drummers. Using the method of narrative inquiry, specifically biography, the study looked at how their learning experiences shaped their (w)holistic development as musicians. The study attempts to identify specific aspects of the drummers learning experiences that could benefit all music students. The study looked at two drummers; one is a traditional Indigenous drummer who learned to drum within traditional Indigenous culture. The second drummer learned to play percussion in a western music education … Lire la suite
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2023 — The role of neurosteriod fluctuation in perimenopausal depressionRésumé
There is a well-established increase in depression risk during the menopause transition – known as perimenopausal depression. Increased fluctuation of estradiol has long been thought to be an important causal factor in perimenopausal depression, and recent research suggests that increases, decreases, or absolute changes in estradiol may be associated with depressive symptoms in different subsets of perimenopausal women. However, the mechanisms by which estradiol differentially influences mood are still very unclear. Preliminary evidence suggests that estradiol may increase vulnerability to developing depressive symptoms through the effects of a neurosteroid called allopregnanolone. In the current study, the role of estradiol and … Lire la suite
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2017 — Synthesis of Amphiphilic DithienylethenesRésumé
The work presented in this thesis describes the design and preparation of asymmetrical, amphiphilic dithienylethenes (DTEs). In general, enhancing the photochromic properties of DTEs is crucial to their application in biocompatible drug delivery systems. The syntheses of DTEs 1–4 were carried out following various devised synthetic routes. Within these synthetic routes, the efficiency of two coupling reactions was found to be important to the overall efficiency of these syntheses. The first reaction involved the regioselective substitution at the 2– and 5–position of thiophene derivatives with aryl- and alkylaryl-substituted boronic acids via Suzuki–Miyaura cross-coupling reactions. In most cases, these substitution reactions … Lire la suite
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2016 — A Social Media Spam Detection Ensemble Methodology Utilizing Multiple Reputation ApproachesRésumé
Over the past number of years, social media has become increasingly popular. This increased popularity has made social media a target for spammers. In addition to email systems, spammers have also turned their attention towards social media message systems and spam has become an increasing problem. Spam clutters user message feeds and can also affect the outcome of social media analysis systems. Traditional approaches to spam detection for individual social media messages is less effective due to message context, character limits, special characters and the like. This thesis proposes alternative methodologies for identifying and removing spam from social media systems. … Lire la suite
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2012 — Equilibrium and Mass Transfer Behaviour of CO2 Adsorption on Zeolites, Carbon Molecular Sieve, and Activated CarbonsRésumé
Natural gas is an important source of energy that usually requires purification steps to remove contaminants prior to pipeline transmission and industrial usage. By pressure swing adsorption process (PSA), carbon dioxide (CO2) can be separated from natural gas using solid materials commonly known as adsorbents. Adsorption capacity (or equilibrium) and adsorption kinetics of the adsorption materials have great impacts on the efficiency of CO2 removal in this PSA process. The objective of this study was to characterize the CO2 adsorption equilibrium and kinetics of commercial adsorbents that have potential for use in the PSA process and also to provide a … Lire la suite
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2022 — MPS modeling of cross-sectional averaged shallow-water equations: Development and applicationRésumé
In the last two decades, mesh-free or particle methods have been widely applied to solve shallow water equations. This research presents a moving particle simulation (MPS) scheme to spatially integrate the cross-sectional average shallow water equations, called 1D MPS-SWE solver. First, a first-order accurate numerical scheme in space and time is developed, applicable to prismatic open channels with closed boundaries. A density-ratio formula is derived for computing the cross-sectional area using the Newton-Raphson iteration and based on the particle number density concept. The newly derived formula does not miscompute the cross-sectional area if an incorrect searching radius parameter is selected, … Lire la suite
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2024 — Depicting variable elimination with Bayesian networksRésumé
This thesis presents a novel graphical representation of variable elimination in discrete Bayesian networks (BNs) utilizing the BN’s directed acyclic graph (DAG) component. This includes methods representing both multiplication and marginalization operations. This graphical representation is achieved by introducing what are known as compound BN nodes, whose presence denotes a compound BN. The key to fitting them into the pre-existing BN DAG is to re-evaluate what a single node in the DAG represents; not a single variable, but the left-hand side of a single conditional probability table (CPT) of the BN. Using compound BNs allows for more descriptive nodes that … Lire la suite
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2019 — Accessing Intimacy: The Experience of Younger Long-Term Care ResidentsRésumé
The sex and intimacy needs of persons with disabilities are increasingly highlighted in research, particularly during the last two decades. There is also research to examine the experience of staff within long term care related to the sex and intimacy needs or behaviours of long-term care residents. However, there is limited research examining the experience of sex and intimacy from the viewpoint of residents, particularly younger residents of long-term care. This qualitative research study uses a phenomenological approach to explore the experiences of persons with disabilities, under the age of 70, living in a long-term care facility, accessing a sexual … Lire la suite
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2016 — Prince Albert's Crime/Risk Reduction Approach to Community SafetyRésumé
Faced with escalating crime rates and increasing demands for services the Prince Albert Police Service led a mobilization effort to implement a crime/risk reduction strategy called Community Mobilization Prince Albert (CMPA). The study examines the evolution of crime prevention practices from police-based efforts that relied on focused enforcement practices to the current risk reduction model. This research examines the outcomes of crime prevention efforts and their results on reducing crime and social disorder after the implementation of the CMPA in 2011. In terms of methodology, two strategies were used. First, a pre-and post-implementation strategy was used to examine whether changes … Lire la suite
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2013 — Reflections on a Collaborative Project between Elementary Students from an International School and Students from a Host CountryRésumé
This thesis is an autoethnographic self-study intended to create conversations amongst educators teaching in international schools overseas, and to possibly bring about change in the way we, as expatriate teachers, view service learning; in the way we attempt to incorporate the host culture, and in the way we promote intercultural literacy with young students. The participants in this study included 17 international school students, aged seven to nine, who collaborated with 25 local students of the same age, on five separate occasions to plan and implement environmental projects in the local community. While mainly project-based and experiential, responsible citizenship through … Lire la suite
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2013 — Exploring the Effects of Time and Money Pressures on Environmentally Responsible Behavior within a Group Resource Conservation ContextRésumé
Resources we use every day such as air and water are public resources so we are all active participants in the commons. A commons dilemma is a situation in which an individual has a choice between boosting personal gain and prolonging the common resource for the good of the commons and all who share it. Commons dilemma research is thus extremely relevant to the well-being of the natural environment. Participating in socially and ecologically responsible behavior involves costs. Individuals are often confronted with inconveniences when it comes to choosing to act in an environmentally-friendly manner. The present study examines the … Lire la suite
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2013 — The Effect of Hyperthermia on Cerebral Hemodynamics, Biological Fatigue and Cardiovascular Strain During 40km Time- Trial Cycling in Trained TriathletesRésumé
The 40 kilometer cycling time-trial (40kmTT) is a sanctioned event in the summer Olympics and is an integral part of the olympic distance triathlon. It is often performed in hot humid climates. Thus, both the exercising muscle and the brain are subject to significant biological fatigue and task failure. This study examined the influence of a 40kmTT performed in the heat on central (brain) and peripheral (muscle) variables. It was hypothesized that middle cerebral artery velocity (MCAv) and the degree of muscle activation ( integrated electromyography - iEMG) of the vastus lateralis would decrease during 40kmTT cycling in hyperthermia (HYP) … Lire la suite
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2018 — What is the Experience of Teachers Who Go On Stress Leave and Then Return to Work?Résumé
This study gathered the stories of four teachers who have experienced stress to a level of burnout and have had to take a temporary leave from work. Through journaling and subsequent interviews, three themes emerged from the stories: efficacy, value, and support. Participants who felt that they were effective at their jobs, were valued by others, and were supported by education stakeholders were less likely to take a stress leave, even in stressful teaching situations. Participants who did not feel effective, valued, and supported felt a sense of displacement. The consequences of displacement were taking a mental health leave from … Lire la suite
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2019 — Improving Implementation of Mental Health Literacy in a Middle Years ClassroomRésumé
The purpose of this practical action research study was to improve my implementation of mental health literacy to middle-years students by using an inquiry-based approach with the intention of understanding how to engage with and address relevant mental health concerns alongside my students. In addition, I hoped to learn about the needs of my own practice related to mental health literacy in order to address my perception of ever-increasing mental health issues arising in my classroom. Twenty participants, both male and female from my homeroom classroom, took part in the study. Data was collected using initial and exit interviews, exit … Lire la suite
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2021 — Health Profession Organizations in the Health Policy Process: A Comparative Case Study of Ontario and SaskatchewanRésumé
This dissertation examined the factors that contributed to the increase of the professional autonomy for the nursing, pharmacy, and dietetics in Ontario and Saskatchewan. Using concepts drawn from the literatures of medical dominance and professional autonomy, this study applied and modified the advocacy coalition framework to examine the complex network of medical knowledge and health stakeholders involved in this health policy subsystem. A comparative case study explored the institutions that shape PHC services within their provincial health care systems, as well as the political and social contexts that propelled the idea of expanding scopes of practice within PHC reform efforts. … Lire la suite
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2021 — Whose Responsibility is it to Address the Marginalized Economic Circumstances of Indigenous Canadians and Does Justice Following the Indian Residential School System Include Social Justice Reforms?Résumé
Indigenous Canadians experience disproportionate rates of economic marginalization compared to their non-Indigenous counterparts (Joseph & Joseph, 2019; Monchalin, 2016; Truth and Reconciliation Commission of Canada [TRC], 2015. This is just one of the many negative transgenerational outcomes that resulted from Canada’s Indian Residential School System (IRSS) (Helin, 2008; Monchalin, 2016; TRC, 2015). Addressing the economic circumstances of Indigenous peoples supports Canada’s journey towards reconciliation (Miller, 2017; TRC, 2015) and serves to benefit all Canadians (Fiscal Realities Economists, 2016; Helin, 2008). Grounded by the positivist paradigm, data were collected from University of Regina and Université de Montréal students regarding their perceptions … Lire la suite
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2021 — Central Canada's Patrick Riel: Metis Soldiers, English Canadian Settler Mythmaking, and the First World WarRésumé
This thesis examines myths surrounding First World War soldier Patrick Riel and argues that white Canadian settlers have created a variety of stories about Patrick Riel’s supposedly Métis identity. Settler-propagated stories about Patrick Riel started after his untimely death in January 1916. In a few short weeks, news of his death had made headlines across Canada. Several war promoters, including the famous Max Aitken (also known as Lord Beaverbrook) and such lesser-known figures as Walter Gordon and Reverend R. G. McBeth propagated myths about Patrick Riel. By 1917, they had turned Patrick Riel into a heroic Métis sharpshooter and a … Lire la suite
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2018 — High School Students' Sexual Health Education - A Retrospective Appreciative Study With University Students in SaskatchewanRésumé
The purpose of this qualitative research study was to explore first year university students experiences in relation to their sexual health education they received through high school in Saskatchewan, Canada. Using the appreciative inquiry method, my intent was to uncover participants positive experiences, paying little attention to negative ones, creating an environment where participants could build an image of an ideal future for sexual health education [SHE] in high schools. Research in Saskatchewan is limited on the subject, but Saskatchewan has some of the highest teenage pregnancy rates and sexually transmitted infection rates in the country (Public Health Agency of … Lire la suite
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2023 — The environmental and geochemical controls on mercury and sulphur cycling in Prairie Pothole Region wetland complexesRésumé
Wetlands are known to play important roles in the cycling of mercury (Hg), which may ultimately lead to the generation of methylmercury (MeHg), a neurotoxin that bioaccumulates in food webs. The Prairie Pothole Region (PPR) of North America hosts sulphur-rich wetlands that favour the production of MeHg. Within these wetland systems, dissolved organic carbon (DOC) and sulphate fuel bacterial sulphate reduction (BSR), resulting in increased Hg methylation in select PPR wetlands. Due to local variability in wetland geochemistry, a reflection of hydrologic processes and differences in surficial Quaternary lithology, understanding the biogeochemical cycling of Hg in these wetlands is inherently … Lire la suite
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2022 — Social Interaction and Physical Activity among Rural Older AdultsRésumé
Physical activity and social interaction are critical components in supporting health and well-being among older adults; therefore, there is significant merit in further exploration of the relationship between these concepts, particularly in rural settings where rates of physical activity are low. Social interaction is also associated with numerous health benefits to older adults; however, little research exists on the association between social interaction and physical activity among rural dwelling older adults. The current COVID-19 pandemic has also placed additional barriers on physical activity participation and social interaction, particularly among older adults who are considered a high-risk population where, in an … Lire la suite
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2015 — A Saskatchewan Perspective of Psychologists’ Quality of Professional Life as a Determinant in Responsiveness when Working as Suicide Interventionist - A Mixed Methods StudyRésumé
Psychologists’ professional quality of life, defined by healthy supportive work environments and satisfaction derived from work, is one factor for determining positive client outcomes (Stamm, 2010; Figley, 2002). Self-care is essential to maintain psychologists’ fitness to practice and work quality (Smith & Burton-Moss, 2009; Skovholt, 2001; Radeke & Mahoney, 2000). Competence and fitness in practice, the demonstration of knowledge, skills, and capabilities to work responsively, safely and effectively, is a professional and ethical expectation pivotal in suicide intervention and ongoing suicide work (Neimeyer, Fortner, & Melby, 2001; Schmitz, Allen, Feldman, Gutin, Jahn, Kleespies, Quinnett, & Simpson, 2012). This concurrent mixed … Lire la suite
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2013 — Initial perceptions of Internet-Based Cognitive-Behaviour Therapy for Chronic pain Among Potential Users: Examining Interest, Perceived Barriers, and StrengthsRésumé
Chronic pain is an important area of study given that 15 to 18% of the Canadian population will develop a chronic pain condition during their lifetime. One difficulty in the self-management of chronic pain is the lack of resources available for those who suffer from this condition. Although preliminary research has demonstrated Internet Cognitive Behaviour Therapy (ICBT) for chronic pain to be a viable treatment option, potential users’ initial perceptions towards this mode of delivery may pose a barrier for the adoption of such programs. The purpose of the study was threefold: to develop a measure of initial perceptions towards … Lire la suite
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2019 — Efficacy of Internet-Delivered Cognitive Behavioural Therapy Following An Acute Coronary Event: A Randomized Controlled TrialRésumé
Depression and anxiety are common among people who have experienced an acute coronary event (e.g., heart attack). Multidisciplinary cardiac rehabilitation programs often focus on reducing risk factors associated with future cardiac events (e.g., smoking, lipid management), however, mental health interventions are not routinely available following significant coronary events. The present study sought to explore the efficacy and acceptability of an Internet-delivered cognitive behavioural therapy program (Cardiac Wellbeing Course) for managing depression and anxiety symptoms among participants who experienced an acute coronary event. Participants were randomized to an intervention (n = 25) or waiting-list control group (n = 28). Symptoms were … Lire la suite
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2014 — The Political Philosophy and Historical Origins of the Second Amendment to the US ConstitutionRésumé
The Second Amendment to the US Constitution states that a well regulated militia and the right of the people to bear arms are necessary for the security of a free state. What were the philosophical and historical origins of this hallmark of American freedom? What was the ‘militia’ understood to mean for the founding generation of Americans? How have the courts and legislatures of the United States played a role in shaping the outcome of this right? The right to bear arms is derived from a graduation of historical ideas that culminated in the American War for Independence. It is … Lire la suite