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Articles 31 - 60 of 267
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Inclusion Of Aerodynamic Effects In Multibody Vehicle Dynamics, Mingyu Sun
Inclusion Of Aerodynamic Effects In Multibody Vehicle Dynamics, Mingyu Sun
Electronic Theses and Dissertations
In vehicle motion analysis, it is often of interest to predict the aerodynamic load and moment acting on the vehicle body, typically with the intention of maximizing tire grip through downward force generated by wings and other aerodynamic devices. This project is not focused on maximizing downward force generated but rather recognizes that an attached wing itself may change the dynamic properties of the vehicle, similarly to the way in which the variation of the wing configuration can lead to changes in the eigenvalues, natural frequencies, and the dynamic modes of an aircraft. To explore this idea further, a multibody …
Characterization Of Corona Discharge For Ignition Improvement, Linyan Wang
Characterization Of Corona Discharge For Ignition Improvement, Linyan Wang
Electronic Theses and Dissertations
Advanced spark ignition (SI) engines may better operate under lean or diluted conditions for fuel efficiency improvement. Under lean or diluted conditions, the ignition and complete combustion of the mixture is a challenge with conventional spark plugs. The small spark gap with limited spark energy delivery and the associated heat loss to the ground electrode, remain to be an unsolved problem. This research explores the corona discharge as an alternative ignition technology to counter the challenges of lean or diluted combustion, including the intensive gas flow condition. Without an adjacent ground electrode, the corona discharge tends to generate a larger …
Neuroevolutionary Training Of Deep Convolutional Generative Adversarial Networks, Kaitav Nayankumar Mehta
Neuroevolutionary Training Of Deep Convolutional Generative Adversarial Networks, Kaitav Nayankumar Mehta
Electronic Theses and Dissertations
Recent developments in Deep Learning are noteworthy when it comes to learning the probability distribution of points through neural networks, and one of the crucial parts for such progress is because of Generative Adversarial Networks (GANs). In GANs, two neural networks, Generator and Discriminator, compete amongst each other to learn the probability distribution of points in visual pictures. A lot of research has been conducted to overcome the challenges of GANs which include training instability, mode collapse and vanishing gradient. However, there was no significant proof found on whether modern techniques consistently outperform vanilla GANs, and it turns out that …
Using Prior Knowledge For Verification And Elimination Of Stationary And Variable Objects In Real-Time Images, Foram Pravinkumar Patel
Using Prior Knowledge For Verification And Elimination Of Stationary And Variable Objects In Real-Time Images, Foram Pravinkumar Patel
Electronic Theses and Dissertations
With the evolving technologies in the autonomous vehicle industry, now it has become possible for automobile passengers to sit relaxed instead of driving the car. Technologies like object detection, object identification, and image segmentation have enabled an autonomous car to identify and detect an object on the road in order to drive safely. While an autonomous car drives by itself on the road, the types of objects surrounding the car can be dynamic (e.g., cars and pedestrians), stationary (e.g., buildings and benches), and variable (e.g., trees) depending on if the location or shape of an object changes or not. Different …
Heart Rate Estimation During Physical Exercise Using Wrist-Type Ppg Sensors, Thiago Toledo Souza
Heart Rate Estimation During Physical Exercise Using Wrist-Type Ppg Sensors, Thiago Toledo Souza
Electronic Theses and Dissertations
Accurate heart rate monitoring during intense physical exercise is a challenging problem due to the high levels of motion artifacts (MA) in photoplethysmography (PPG) sensors. PPG is a non-invasive optical sensor that is being used in wearable devices to measure blood flow changes using the property of light reflection and absorption, allowing the extraction of vital signals such as the heart rate (HR). However, the sensor is susceptible to MA which increases during physical activity. This occurs since the frequency range of movement and HR overlaps, difficulting correct HR estimation. For this reason, MA removal has remained an active topic …
Cooperative Traffic Control Solution For Vehicle Transition From Autonomous To Manual Mode Exploiting Cellular Vehicle-To-Everything (C-V2x) Technology, Stefano Caserini
Cooperative Traffic Control Solution For Vehicle Transition From Autonomous To Manual Mode Exploiting Cellular Vehicle-To-Everything (C-V2x) Technology, Stefano Caserini
Electronic Theses and Dissertations
Nowadays, automated vehicles represent a promising technology to face the stringent requirements for safety and traffic efficiency in the automotive environment. Driving responsibilities will be gradually addressed to the machine, and the role of human pilots will be progressively reduced to passengers. The interaction between passengers and the automated system will create different risks that have not been considered in the past. In particular, the transition between autonomous and manual mode is understood as a risky situation. During the transition, the driver manifests driving irregularities and loss of situation awareness that may endanger himself and other participants on the road. …
Modeling And Analysis Of Multi–Phase Permanent Magnet Synchronous Machines: Direct–Drive Electric Vehicle Application, Himavarsha Dhulipati
Modeling And Analysis Of Multi–Phase Permanent Magnet Synchronous Machines: Direct–Drive Electric Vehicle Application, Himavarsha Dhulipati
Electronic Theses and Dissertations
In commercially existing electric vehicles (EVs), power is transferred from the motor to the wheels through a fixed gear mechanical transmission system. However, such a transmission system contributes to a power loss between 2% to 20% of output power of the motor depending on the operating speed and torque of the motor. Therefore, by removing the transmission, a direct–drive EV configuration is obtained with lower component count, improved motor to wheel efficiency and frequency dependent losses. However, challenges in developing a single on–board permanent magnet synchronous machine (PMSM) for such a configuration include high torque density, low torque ripple and …
Help Seeking Behaviours Of Adolescents In Foster Care: Multiple Perspectives, Emily Marie Johnson
Help Seeking Behaviours Of Adolescents In Foster Care: Multiple Perspectives, Emily Marie Johnson
Electronic Theses and Dissertations
Adolescents in foster care experience higher rates of mental health and behavioural problems compared to those who have never been in care (e.g., Pecora, Jensen, Romanelli, Jackson, & Ortiz, 2009). It is thus vital that they acquire help seeking skills, as this may reduce psychological distress (Ciarrochi, Deane, Wilson, & Rickwood, 2002). Given that previous research has identified unique aspects in the help seeking process of youth in care (Blower et al., 2004; Pryce, Napolitano, & Samuels, 2017; Stanley, 2007; Unrau & Grinnell, 2006), the present study sought to gain a deeper understanding of this process from multiple perspectives, and …
Intimate Partner Violence In Sub-Saharan Africa: Characteristics, Patterns, And Multi-Level Influences, Amy Elizabeth Peirone
Intimate Partner Violence In Sub-Saharan Africa: Characteristics, Patterns, And Multi-Level Influences, Amy Elizabeth Peirone
Electronic Theses and Dissertations
Approximately one-third of women across the globe have been raped and/or assaulted by an intimate partner in their lifetimes, with these rates of intimate partner violence (IPV) exceeding 50% for women in some areas of sub-Saharan Africa. Despite these prevalence rates, however, there is little empirical work that explores potential differences in experiences of intimate partner violence (IPV). Research tends to oversimplify IPV, viewing it as a unitary homogenous experience, rather than a multifaceted experience, limiting our understanding of the different types or variations of IPV, and the factors related to them. This research begins to address this gap in …
Finding The Right Fit: Exploring Esl Teachers And Students’ Perceptions Of Ilit Ell, A Technology-Based Literacy Program’S Use With High School English Language Learners, Sara Shahbazi
Electronic Theses and Dissertations
The purpose of this interpretative phenomenological study was to explore the lived experiences ESL secondary teachers and their perceptions towards the use, effects and integration of iLit ELL, a technology-based language program designed for English Language Learners, as well as, the perceived effects the program had on students’ motivation and attitudes towards learning English. Data were collected using teacher interviews, student focus groups and final reflections, as well as my observations and field notes. The collected data were analyzed through the steps of Interpretive Phenomenological Analysis (IPA) to broaden the breadth and depth of the content and complexity of each …
Cultural Algorithm Based On Decomposition To Solve Optimization Problems, Ramya Ravichandran
Cultural Algorithm Based On Decomposition To Solve Optimization Problems, Ramya Ravichandran
Electronic Theses and Dissertations
Decomposition is used to solve optimization problems by introducing many simple scalar optimization subproblems and optimizing them simultaneously. Dynamic Multi-Objective Optimization Problems (DMOP) have several objective functions and constraints that vary over time. As a consequence of such dynamic changes, the optimal solutions may vary over time, affecting the performance of convergence. In this thesis, we propose a new Cultural Algorithm (CA) based on decomposition (CA/D). The objective of the CA/D algorithm is to decompose DMOP into a number of subproblems that can be optimized using the information shared by neighboring problems. The proposed CA/D approach is evaluated using a …
Phosphine Supported Mono-And Polynuclear Ni Complexes For Inert Bond Activation: Mechanisms And Isolation Of Reactive Intermediates, Sha Zhu
Electronic Theses and Dissertations
Inert C−O bond activation has been an important research area because ethers have the potential to replace organohalides as relatively economic and less toxic building blocks. Phosphine supported Ni complexes have been found to be reactive towards C−O bonds. A number of cross-coupling reactions using Ni catalysts for C−O activation have been developed. However, mechanistic understanding lags behind current application. Multiple mechanisms have been proposed based on DFT studies, while few intermediates have been isolated or observed experimentally. This dissertation focuses on the mechanistic details of Ni mediated C(sp2)−O activation. The number of ligand coordinated to Ni in the critical …
Optimizing Strengths And Resources In A Memorial Cup Team: A Strengths And Hope Perspective, Dan Upham
Optimizing Strengths And Resources In A Memorial Cup Team: A Strengths And Hope Perspective, Dan Upham
Electronic Theses and Dissertations
In this case study, I explored the use of strengths and available resources linked to 'hope-in' a shared preferred future (Jacobs, 2005) within the Windsor Spitfires hockey club as they worked towards their participation as the host team of the 2017 MasterCard Memorial Cup tournament. I conducted two sets of semi-structured interviews throughout the Spitfires organization (set one was thirteen interviews and set two was twelve interviews). Interviews were conducted post-trade deadline and post-Memorial Cup. Participants were chosen from three categories: players and player support (7); staff (5); and management (2). Extending Snyder's (2002) research on high-hope individuals, I looked …
Cognitive Load Detection For Advanced Driver Assistance Systems, Prathamesh Ayare
Cognitive Load Detection For Advanced Driver Assistance Systems, Prathamesh Ayare
Electronic Theses and Dissertations
In this thesis, we investigate cognitive load detection and classification based on minimally invasive methods. Cognitive load detection is crucial for many emerging applications such as advanced driver assistance systems (ADAS) and industrial automation. Numerous studies in the past have reported several psychological measures, such as eye-tracking, electrocardiogram (ECG), electroencephalogram (EEG), as indicators of cognitive load. However, existing physiological features are invasive in nature. Consequently, the objective of this study is to determine the feasibility of non-invasive features such as pupil dilation measurements low-cost eye-tracker with minimal constraints on the subject for cognitive load detection. In this study, data from …
The Aphasia Friendly Business Campaign, Julia Borsatto
The Aphasia Friendly Business Campaign, Julia Borsatto
Electronic Theses and Dissertations
Aphasia is a language disorder that affects a person’s ability to speak, read, write, or understand. The disorder is multi-faceted and symptoms vary greatly among individuals, but all forms create pervasive communication barriers that make participation in society difficult. There are well over 100,000 Canadians with aphasia, making this disorder more common than Parkinson’s disease or muscular dystrophy, but unlike those disorders, very few people have heard of aphasia. On the ground, the consequences of this lack of knowledge is that Canadian businesses and organizations are ill-equipped to accommodate customers with this invisible disability. The present study introduces The Aphasia …
Rape Acknowledgement In The Context Of The #Metoo Movement, Brandin Glos
Rape Acknowledgement In The Context Of The #Metoo Movement, Brandin Glos
Electronic Theses and Dissertations
Sexual violence perpetrated by men against women is a pervasive social issue that affects women around the world. Sexual violence has taken place in what has been termed “rape culture,” or a culture in which sexual violence is normalized, minimized, or tacitly condoned. In October 2017, #MeToo gained global attention when numerous women began sharing experiences of male perpetrated sexual violence via social media. The recent attention given to issues of sexual violence has included little discussion about the issues facing women who have not acknowledged, or women who report male perpetrated coercive experiences that fall within the legal definition …
An Empirical Investigation Of Barriga’S Mediational Model Of Moral Cognition And Antisocial Behaviour: Moral Reasoning Recognition Versus Response Generation Assessments In Models For General Delinquency And Sexually Coercive Behaviours, Sarah Gardiner
Electronic Theses and Dissertations
In an attempt to understand how moral cognitions influence individual’s choices to engage in antisocial behaviours, Barriga et al. (2001) created a cognitive developmental model. The main goal of the present study was to replicate Barriga’s et al. (2001) updated model (Beerthuizen & Brugman, 2013) and extend their work by applying the model to sexually coercive behaviours. To investigate these associations, 123 participants completed online questionnaires that measured moral value evaluation, moral reasoning, moral identity, criminogenic cognitions and self-reported delinquent behaviours, including sexually coercive behaviours. Additionally, hostile attitudes towards men/women and desirable responding where measured and were used as control …
An Experimental Investigation Of Tank Pressure Oscillations During Filling With A Bi-Stable Load Switched Supersonic Fluidic Oscillator, Chris Peirone
An Experimental Investigation Of Tank Pressure Oscillations During Filling With A Bi-Stable Load Switched Supersonic Fluidic Oscillator, Chris Peirone
Electronic Theses and Dissertations
Preliminary testing shows that providing pressure pulsations during the super plastic forming process has proven to increase the total elongation of the material and is thus, likely to improve product design flexibility. A bi-stable load switched supersonic fluidic oscillator is the preferred device used to promote these pressure fluctuations during the superplastic forming process due to the absence of moving mechanical parts and resulting reliability. This thesis includes the design, construction and use of a supersonic fluidic oscillator. This apparatus can be used to validate available numerical results and identify any consistent trends over a range of operating conditions. The …
Virtual Model Of A Vehicle Adaptive Damper System, Kyle Hugo
Virtual Model Of A Vehicle Adaptive Damper System, Kyle Hugo
Electronic Theses and Dissertations
Several FCA vehicles are fitted with semi-active damper systems which modulate the level of damping implemented in the vehicle suspension system to improve both the handling and ride quality felt by vehicle’s occupants. Durability simulations are necessary to analyze a vehicle’s or a component’s structural integrity over an expected lifespan. Performing durability simulations in a virtual environment has streamlined the traditional development cycle by reducing the need to construct physical prototypes and conduct physical road or bench tests. It is essential that the vehicle is modeled as accurately as possible in the virtual environment to ensure the results are representative …
Pressure Cycle Induced Fatigue Failure Of Wrinkled Energy Pipelines, Navjot Singh
Pressure Cycle Induced Fatigue Failure Of Wrinkled Energy Pipelines, Navjot Singh
Electronic Theses and Dissertations
The development of a small wrinkle in a buried pipeline can be a challenging issue for pipeline operators to approach. Although a vast majority of research has been conducted, to evaluate the integrity of a pipeline showing signs of irregularities such as corrosion, pipe wall buckling and/or rippling; there is limited research data or guideline(s) available as to how to assess the severity of a small wrinkle defect. If not dealt with appropriately, these small wrinkle defects can lead to further damage of the pipe wall as a result of fatigue damage caused by internal pressure cycling. This research program …
Investigating The Transfer Of Metacognition To Domains Distinct From Mathematics, Justin Teeuwen
Investigating The Transfer Of Metacognition To Domains Distinct From Mathematics, Justin Teeuwen
Electronic Theses and Dissertations
The purpose of the present research was to investigate the transfer of metacognition from mathematics to other domains for a post-secondary population. A systematic literature review revealed potential transferability for metacognitive strategic knowledge, metacognitive planning, monitoring, and debugging. Mevarech and Kramarksi’s (1997) IMPROVE model was modified to incorporate the explicit instruction of transfer and then used as the metacognitive intervention for a beginner-level calculus course at the University of Windsor. This occurred over a period of five weeks with n = 90 participants for each of the experimental and control groups. A concurrent, triangulated mixed-method research design was employed to …
Performance Of Buckets Versus Min-Heap In The A* Search Algorithm, Sheeba Mohanraj
Performance Of Buckets Versus Min-Heap In The A* Search Algorithm, Sheeba Mohanraj
Electronic Theses and Dissertations
Pathfinding is the search for the least cost route between two points on a map. Given a map with a start node and a goal node, the pathfinding algorithm begins from the start node and searches through the map exploring its neighbours until it finds a path to the goal node. A* is the most popular pathfinding algorithm which uses heuristics for finding the least cost path from the start node to the goal node. The A* algorithm uses two parameters g cost(the actual cost of reaching the current node from the start node) and the h cost(the estimated cost …
Estimation And Tracking Algorithm For Autonomous Vehicles And Humans, Jingyu Wang
Estimation And Tracking Algorithm For Autonomous Vehicles And Humans, Jingyu Wang
Electronic Theses and Dissertations
Autonomous driving systems have experienced impressive growth in recent years. The present research community is working on several challenging aspects, such as, tracking, localization, path planning and control. In this thesis, first, we focus on tracking system and present a method to accurately track a moving vehicle. In the vehicle tracking, considering the proximity of surrounding vehicles, it is critical to detect their unusual maneuvers as quickly as possible, especially when autonomous vehicles operate among human-operated traffic. In this work, we present an approach to quickly detect lane-changing maneuvers of the nearby vehicles. The proposed algorithm is based on the …
Spectrum Occupancy Estimation And Analysis, Danilo Roberto Corral-De-Witt
Spectrum Occupancy Estimation And Analysis, Danilo Roberto Corral-De-Witt
Electronic Theses and Dissertations
The goal of Cognitive Radio (CR) is to facilitate efficient utilization of the electromagnetic spectrum. CR applies spectrum sensing techniques to detect unused channels and then allows opportunistic usage of such channels by secondary users, i.e., un-licensed users, without interfering with primary users, i.e., licensed users. In order to implement a complete TV White Spaces (TVWS) based CR system, at first a model is needed that can be used for identifying TVWS, which can then be exploited for dynamic spectrum access. This work is focused on proposing a sensing method and building a probabilistic model for identifying the occupancy of …
Microanalysis Of Mg Isotope Abundances Using Laser Ablation Inductively Coupled Plasma Mass Spectrometry (La-Icp-Ms): Application To Hydrocarbon Reservoirs, Namir Al-Aasm
Electronic Theses and Dissertations
This study evaluates the potential of conventional nanosecond laser ablation inductively coupled plasma mass spectrometry (ns-LA-ICP-MS) analysis in conjunction with advanced data reduction techniques based on integrated counts per second (ICPS) summation for the in situ microanalysis of the Mg isotopic composition of dolomitized rocks from hydrocarbon reservoirs. Chemical composition of these carbonates is affected by fluid/rock interactions between infiltrating dolomitizing fluid(s) and carbonate host rock(s). Diagenetic fluids can impart a unique chemical composition, causing zonation, each zone potentially having characteristic 25Mg/24Mg and 26Mg/24Mg ratios. Three standard reference materials (SRMs), both matrix-matched and pure, were compared by solution nebulization (SN)- …
Are Emotions Influenced By Their Sequence? An Experimental Study Of Emotional Processing, Stephanie Nardone
Are Emotions Influenced By Their Sequence? An Experimental Study Of Emotional Processing, Stephanie Nardone
Electronic Theses and Dissertations
The present study examined whether resolution of lingering anger and sadness about an interpersonal interaction depends on the sequence in which anger and sadness are experienced. Within a total sample of 104 participants, two groups were identified based on presenting emotional concern: individuals with predominantly lingering anger about an interpersonal interaction (n = 26), and individuals with predominantly lingering sadness about an interpersonal interaction (n = 56). Participants completed a written emotional processing intervention in one of two randomly assigned conditions (i.e., anger-before-sadness condition or sadness-before-anger condition), which differed only by the order in which participants were guided to feel …
Mind Wandering And Academic Success: Insight Into Student Learning And Engagement, Rebecca Nurgitz
Mind Wandering And Academic Success: Insight Into Student Learning And Engagement, Rebecca Nurgitz
Electronic Theses and Dissertations
Mind wandering may be detrimental to learning and memory. This is especially true for university students, who are often identified as at greater risk for distraction by readily available technology (e.g., laptops, cell phones, smart watches) in learning environments. As mind wandering is a complex construct, it is difficult to capture and quantify. Behavioural and subjective measures used in the past have been criticized for the lack of generalizability from research environments to other settings. The current study investigated mind wandering within the context of learning engagement in university students using functional near-infrared spectroscopy (fNIRS). Mind wandering episodes were inferred …
One Size Fits All? Exploring The Relationship Of Person-Environment Fit And Trust To Feeling Psychologically Safe In The Workplace, Twiladawn Stonefish
One Size Fits All? Exploring The Relationship Of Person-Environment Fit And Trust To Feeling Psychologically Safe In The Workplace, Twiladawn Stonefish
Electronic Theses and Dissertations
Growing attention to the importance of employee psychological health has resulted in increased attention to its determinants and a growing desire to understand the psychosocial mechanisms through which employee psychological safety can be facilitated. Psychological safety is defined as employees’ taken-for-granted beliefs regarding the safety of engaging in interpersonal risk-taking, such that employees believe that they are free to express thoughts and concerns without fear of judgment or reprisal. The review focused on three important organizational constructs which have fueled considerable empirical research, largely to the exclusion of each other: psychological safety, person-environment fit, and trust. The research study adopted …
Metal-Mediated Vinylogous Nazarov Cyclization Reaction, Somaiah Khalid Almubayedh
Metal-Mediated Vinylogous Nazarov Cyclization Reaction, Somaiah Khalid Almubayedh
Electronic Theses and Dissertations
The Nazarov cyclization reaction has been used as an effective method to synthesize cyclopentanones. While 6-membered ring systems can be available by way of the homo Nazarov variant, 7-membered ring formation involving a Nazarov-type reaction is very rare, and completely unknown thermally. Using the established concept of the ability of the alkyne-Co2(CO)6 moiety to enable the formation of -carbonyl cations and the good stability of this generated cation, 7-membered ring formation via the vinylogous Nazarov reaction with electron deficient enones has been investigated. The desired aryl substituted enyone-Co2(CO)6 complex precursors for the cyclization reaction have been prepared from commercially available …
Friction And Wear Reduction On Lightweight Engine Valves And Cylinder Bores In Internal Combustion Engines, Ming Lou
Electronic Theses and Dissertations
The objective of this study is to develop new tribological methods for reducing friction and wear of critical internal combustion (IC) engine components, namely engine valves and cylinder bores, either using lightweight materials or advanced coatings. Increasing the components’ durability by improving their wear resistance and optimizing vehicles’ fuel economy by controlling the friction are among this study’s principal goals. Most lightweight materials used in IC engines, Al and Ti alloys, suffer from higher wear rates than conventional cast irons (CI) and steels. Ti alloy valves are proposed to replace steel valves, but their high temperature wear resistance needs to …