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Diet Reconstruction And Niche Of Lake Ontario Top Predators And Corresponding Prey Species, James Adam Mumby
Diet Reconstruction And Niche Of Lake Ontario Top Predators And Corresponding Prey Species, James Adam Mumby
Electronic Theses and Dissertations
Lake Ontario supports a diverse offshore fish community consisting of salmonids and forage fish with little known about the resource partitioning and habitat use of these species. To assess this, I used stable isotopes to determine the isotopic trends (forage fishes only), niche structure and overlap of both salmonids and forage fishes. I also estimated the salmonid trophic position (TP) and diet using stable isotopes. Forage fishes had high resource partitioning but was low between Myoxocephalus thompsonii and Cottus cognatus. Regional and temporal discrete subpopulations driven largely by nitrogen were only present in Alosa pseudoharengus, Osmerus mordax and Neogobius melanostomus. …
Innovative Noise Analysis And Abatement Design For Large Mining Vehicles, Frank Angione
Innovative Noise Analysis And Abatement Design For Large Mining Vehicles, Frank Angione
Electronic Theses and Dissertations
GoldCorp Porcupine mine, located in the city centre of Timmins, Ontario, is Timmins’ largest industrial operation and is located near to residential receptors. Given this, noise compliance to the Ministry of the Environment guidelines is a concern for GoldCorp. A significant source of environmental noise is the Caterpillar 785B haul trucks, which transport raw materials along the haul road and past the residential receptors. The goal of this research is to analyze and design an effective abatement plan to lessen the noise impact of the haul trucks used at the GoldCorp mine. The novelty of the research is the use …
Using Curriculum-Based Measurement In The Assessment Of Reading Disabilities, Jessica Menard
Using Curriculum-Based Measurement In The Assessment Of Reading Disabilities, Jessica Menard
Electronic Theses and Dissertations
The present investigation looked at students’ reading achievement within the context of the Peer Assisted Learning Strategies (PALS) intervention. It consisted of three separate studies, all of which are related to reading achievement and intervention during the early years of school. The purpose of Study One was to determine whether students who are identified with reading disabilities via psychological assessment report make improvements over the school year subsequent to the implementation of this report. It was hypothesized that when teachers have access to psychological assessment reports, they will better understand their students’ individual learning needs and that this will translate …
Genetic, Environmental, And Behavioural Factors Underlying Differential Growth And Alternative Reproductive Tactics In Chinook Salmon, Oncorhynchus Tshawytscha., Adriana Forest
Electronic Theses and Dissertations
Alternative reproductive tactics (ARTs) in salmonids are influenced by differential growth amongst individuals. In Chinook salmon, Oncorhynchus tshawytscha, males develop into large “hooknose” males and smaller, precocious “jacks.” The production of jacks is influenced by genetics, environment, and possibly behaviour (i.e., aggression). I examined genetic, environmental, and behavioural factors underlying ARTs in Chinook salmon. By using a full-factorial breeding design, I found that jacking rate was explained by negative maternal, 12% additive, and 0% non-additive effects. I found that dams originating from low performance genetic lines produced families with higher jacking rates. I found that both rearing environment and sire …
Hydrodynamics Of Accumulators Of Compressed Air For An Uwcaes Plant, Ahmadreza Vaselbehagh
Hydrodynamics Of Accumulators Of Compressed Air For An Uwcaes Plant, Ahmadreza Vaselbehagh
Electronic Theses and Dissertations
The present document is a manuscript-based dissertation covering Ahmadreza Vasel-Be-Hagh's PhD research from September, 2011 to May, 2015. The research was particularly focused on studying hydrodynamics of underwater accumulators of compressed air for an underwater compressed air energy storage (UWCAES) plant. The accumulator units were floral configurations of droplet-shaped balloons installed close to the bed of deep water. The research was carried out in two major parts: water flow over the balloons and flow produced by the bursting of the balloons. In the first part, three-dimensional simulations were conducted to investigate water flow over accumulators. The simulation was carried out …
Linking Climate, Arthropod Emergence, And Fitness In Snow Buntings (Plectrophenax Nivalis), Peter Joseph Marier
Linking Climate, Arthropod Emergence, And Fitness In Snow Buntings (Plectrophenax Nivalis), Peter Joseph Marier
Electronic Theses and Dissertations
Arctic ecosystems are facing some of the most severe and variable climatic impacts due to climate change. We examined the impact of this climatic variation on arthropod abundance and phenology, and how these relationships impact reproductive decisions and fitness in an Arctic-breeding passerine, the snow bunting (Plectrophenax nivalis) using a seven-year dataset from the low Canadian Arctic. Intra- and inter-annual climate-based models yielded significant variation in predictive capacity of arthropod emergence and abundance, limiting their hind- and fore-casting use. At the population level, snow bunting laying decisions appeared constrained by spring temperatures and laying did not appear timed to match …
Investigations Into The Regulation Of The Redox Activity Of Protein Disulfide Isomerase By Active Site-Flanking Lysines, Hyder Ali Khan
Investigations Into The Regulation Of The Redox Activity Of Protein Disulfide Isomerase By Active Site-Flanking Lysines, Hyder Ali Khan
Electronic Theses and Dissertations
Protein disulfide isomerase (PDI) is crucial in the redox of disulfide bonds, where it catalyzes reductase, oxidase, and isomerase activity. The active site motif for PDI is CXXC, which is found in the a and a’ domain. PDI is mainly localized to the endoplasmic reticulum, where it plays a key role in the folding of new proteins through proper disulfide formation. With new studies about the regulation of protein activity by lysine acetylation, our group wished investigate this post-translational modification on PDI. Flanking each active site motif of PDI is a lysine residue. These active site-flanking lysine residues were mutated …
Vocal And Visual Communication In An Explosively Breeding Neotropical Toad, Nicolas Rehberg-Besler
Vocal And Visual Communication In An Explosively Breeding Neotropical Toad, Nicolas Rehberg-Besler
Electronic Theses and Dissertations
Frogs and toads use both acoustic and visual signals to communicate within their noisy, competitive breeding aggregations. In this thesis, I studied acoustic and visual signals in the Neotropical yellow toad, Incilius luetkenii, in Costa Rica. I provide the first quantitative description of this species’ vocal behaviour, and I demonstrate that the spectral properties of male calls are correlated with body size; therefore, male calls may be used in size assessment. I experimentally demonstrate that chorus transmission distance is enhanced by the number of concurrently calling toads as well as the pitch of their calls; therefore choruses may attract more …
Ferritic Nitrocarburizing Of Plain Carbon Steels, Madhavan Manivannan
Ferritic Nitrocarburizing Of Plain Carbon Steels, Madhavan Manivannan
Electronic Theses and Dissertations
Nitrocarburizing is a case hardening process which improves the hardness and wear resistance of a component, but results in geometric distortions. Torque converter pistons (automotive component) and Navy C-ring specimens (measuring tool) made from SAE 1010 plain carbon steel were used for the distortion analysis. Navy C-rings are generally used for studying the dimensional changes of a material before analyzing the dimensional changes of the actual component. Navy C-rings of varying thicknesses were used to analyze the effect of distortions with the change in thickness. Finite element simulations of Navy C-rings and torque converter pistons were developed to study the …
Communicatin, Conflict And Mental Health: Chinese Immigrant Parents And Their Children, Nonghong Liu
Communicatin, Conflict And Mental Health: Chinese Immigrant Parents And Their Children, Nonghong Liu
Electronic Theses and Dissertations
The purpose of this study was to investigate the potential conflicts between Chinese immigrant parents and their children. Data were collected through survey and interviews. A total number of 170 surveys were analyzed and nine pairs of Chinese Immigrant parents and their high school children were interviewed. The exploration into the participants revealed that Chinese immigrant parents and their children experienced conflicts in education, career choice, and daily behaviors because of cultural differences, different expectations in education and career, language barriers, different ways of thinking, child rebellion, generation gaps, and a lack of communication. These conflicts had made their children …
Rosewater, Hanan Hazime
Rosewater, Hanan Hazime
Electronic Theses and Dissertations
Rosewater is an Arab-Canadian novella composed of two short stories- “ Hab al Ruman” and “Sharbat”. “Hab al Ruman” is set in 1983 in Mount Lebanon and presents the mental journey of a single Muslim mother as she struggles to preside over her adolescent daughter’s future. “Sharbat” is set in 2012 in Southwestern Ontario and features the disjunctive psychological explorations of a young Lebanese-Canadian Muslimah as she struggles to liberate herself from the restrictive cultural binaries imposed upon her.
A Frontier Based Multi-Robot Approach For Coverage Of Unknown Environments, Raja Sankar Dileep Muddu
A Frontier Based Multi-Robot Approach For Coverage Of Unknown Environments, Raja Sankar Dileep Muddu
Electronic Theses and Dissertations
With the advent of latest technical advancements in the field of robotics, a stage has arrived where autonomous robots are expected to help humans in tasks that are either dangerous or too monotonous such as mining, search and rescue, floor cleaning. All these problems are derivatives of coverage problem wherein the motto is complete coverage of the environment in a time effective manner. Most of the coverage methods developed till date have access to the map prior to exploration and only few of them made use of multiple robots. In view of the drawbacks of the existing approaches, we developed …
Pre-Service Educational Assistants’ Attitudes Toward Inclusion, John Freer
Pre-Service Educational Assistants’ Attitudes Toward Inclusion, John Freer
Electronic Theses and Dissertations
In recent years, educational assistants have taken on an integral role in special education. They often work with the most challenging and vulnerable student population. To prepare EAs, some of Ontario’s publicly funded colleges have developed pre-service programs. In Ontario, the number of students receiving special education services in K-12 is increasing, and policy trends are advocating for educational inclusion. Literature has suggested that educators’ attitudes toward educational inclusion may impact the extent to which inclusive strategies are implemented. Despite the importance of EAs in the special education team, very few studies have investigated their attitudes toward inclusion. This study …
Experimental Study On Vibration Mitigation Of Bridge Stay Cables Using Cross-Ties And Hybrid System, Gnanasekaran Sandanam
Experimental Study On Vibration Mitigation Of Bridge Stay Cables Using Cross-Ties And Hybrid System, Gnanasekaran Sandanam
Electronic Theses and Dissertations
Controlling excessive vibrations of stay cables on cable-stayed bridges is important to minimize the fatigue failure and damage at the cable anchorages. Using cross-ties to connect a vulnerable cable with its neighbors to form a cable network and installing external damper to a cable have been widely used in field. More recently, the idea of adding damper to an existing network to form a hybrid system was also proposed. Though the stiffening effect of the cross-tie solution are widely studied by numerous researchers, the damping property of a network has rarely been investigated. Also, the available studies on the hybrid …
Coercive Control And Physical Violence At The Onset Of Dating Relationships: A Prospective Longitudinal Study, Amanda Rachel Levine
Coercive Control And Physical Violence At The Onset Of Dating Relationships: A Prospective Longitudinal Study, Amanda Rachel Levine
Electronic Theses and Dissertations
Intimate partner violence (IPV) has been suggested as a consequence of coercive control (CC), a pattern of demands placed on a romantic partner, threats about what will occur if the demands are not met (e.g., IPV), and surveillance to ensure that demands have been met (Dutton & Goodman, 2005). This hypothesis has yet to be examined among dating couples, and little is known about how CC and physical violence arise in dating relationships. The current study had three main objectives: (a) to determine the way in which CC and IPV change over time in newly established dating relationships, (b) to …
A Mixed Methods Examination Of The Influence Of Social Culture On Perceptions Of Culturally Adaptive Behaviours And Trustworthiness In Work Settings, Iris Yu-Yi Lin
Electronic Theses and Dissertations
A mixed-methods approach was used to assess the role of trustworthiness in cross-cultural business partnerships. In Study One, qualitative responses from 100 undergraduate students (50 Canadian, 50 Taiwanese) were analyzed to identify cultural similarities and differences in their perceptions of a trustworthy person, employee, and supervisor/employer. Respondents from both countries used descriptors that fit the ability, benevolence, and integrity framework to describe trustworthy individuals. However, comparison between countries and between targets (i.e., person, employee, supervisor/employer) revealed differences in the frequency with which certain types of descriptors were used. Additionally, dimensions of trustworthiness not included in the ability, benevolence, and integrity …
Substrate And Head Group Modifications For Enhanced Stability In Molecular Electronic Devices, Michael-Anthony Ferrato
Substrate And Head Group Modifications For Enhanced Stability In Molecular Electronic Devices, Michael-Anthony Ferrato
Electronic Theses and Dissertations
Poor Self-Assembled Monolayer (SAM) stability is a barrier which impedes the incorporation of molecular layers as functional components in electronic device architectures. Here we investigate the molecular electronic characteristics of two well established approaches to enhancing SAM stability. In Chapter 2 we investigate the electrochemical modification of Au substrates by the underpotential deposition of silver monolayers (AgUPD). In Chapter 3 we study chelating dithiophosphinic acid (DTPA) head groups to anchor SAM molecules to substrates. Based on molecular electronic characterization using EGaIn Tip testbeds, we observed that AgUPD substrates maintained the inherent electronic character of n-alkanethiolate SAMs, but reduced charge transport …
Acoustic And Visual Signals Of Species Discrimination In Competing Neotropical Wrens, Kristina Hick
Acoustic And Visual Signals Of Species Discrimination In Competing Neotropical Wrens, Kristina Hick
Electronic Theses and Dissertations
Animals must discriminate between individuals within their own species, and between individuals of their own species and individuals of competitor species, allowing animals to differentiate between threatening rivals, non-threatening individuals, and potential mates. Studying two competing neotropical wren species, I tested the influence of experience on species discrimination using acoustic playback. Contrary to my predictions, the playback experiment showed that species discrimination was not influenced by previous experience with a competitor species. I also studied the relative importance of acoustic and visual signals for intra- and interspecific discrimination using playback combined with presentation of visual models. The playback-and-model-presentation experiment showed …
#Socialmedia: Exploring The Associations Of Social Networking Sites And Body Image, Self-Esteem, Disordered Eating And/Or Eating Disorders And The Impact Of A Media Literacy Intervention, Sara Santarossa
Electronic Theses and Dissertations
The aim of the present study was to investigate associations between SNSs and body image (BI), self-esteem (SE), and eating behaviours (EBs)/eating disorders (EDs) (Study A) and to evaluate the impact of a media literacy intervention (Study B). A sample of young adults (N = 160) completed Study A and then were randomly assigned to a control or intervention group (Study B). A follow-up survey was completed (n = 78) one month after the intervention. Study A revealed that females and males spent 4.1±5.3 and 2.9±2.8 hours on SNS, respectively; with the majority of time spent lurking (i.e., looking at …
Structure Of Methane Inverse Diffusion Flames With Pre-Heated Co-Flowing Simulated Combustion Products, Xisheng Zhao
Structure Of Methane Inverse Diffusion Flames With Pre-Heated Co-Flowing Simulated Combustion Products, Xisheng Zhao
Electronic Theses and Dissertations
The inversed diffusion flame (IDF) burner which is characterized by a double flame structure and ultra-low nitrogen oxide emissions has been studied at the lab scale in this work. This experimental study is intend to investigate the structure of co-axial non-premixed diffusion flames with inversed flow arrangement of methane and air, surrounded with combustion products from a lean flat flame, simulated combustion products, nitrogen and air. The co-flow stream is to simulate the possible gases surrounding the flames inside an industrial furnace. The previous numerical and experimental investigation has studied central air jet flows into the co-annular fuel jet, and …
Experimental Investigation Of The Effect Of Key Variables On The Static Strength Of Aluminum Alloy Structural Adhesive Joints, Francesco Vincenzo Amoruso
Experimental Investigation Of The Effect Of Key Variables On The Static Strength Of Aluminum Alloy Structural Adhesive Joints, Francesco Vincenzo Amoruso
Electronic Theses and Dissertations
Fuel economy targets are pushing car makers to develop several strategies in order to reduce the weight of the vehicles. Within this scenario adhesive bonding is nowadays a widespread technology that represents a joining technique aiming to replace or to combine fastening for lightweight construction of car bodies and multi-material design. In this work an experimental investigation into the static strength of aluminum alloy structural adhesive lap joints is carried out by varying factors influencing the bonding behaviour of the joint. The impact of surface roughness, geometrical control factors (adherend thickness and adhesive thickness) and test conditions (test temperature and …
The Roles Of Individual Variation And Female Choice In Round Goby (Neogobius Melanostomus) Acoustic Signalling, Meghan Donovan
The Roles Of Individual Variation And Female Choice In Round Goby (Neogobius Melanostomus) Acoustic Signalling, Meghan Donovan
Electronic Theses and Dissertations
Acoustic signalling in teleost fishes serves a variety of communicatory purposes, mostly centered around aggression and courtship. There is strong evidence that courtship calls are used by many fishes to locate mates, coordinate spawning, and for species recognition, but the possibility that these calls also act as honest signals is not yet highly explored. Calls produced by the male round goby, Neogobius melanostomus, were analyzed for dominant frequency, interpulse interval, duration and number of pulses in the call. Call characteristics were then analyzed for relationships to body morphometrics of total length, head width, total weight, and gonadosomatic index. Strong interactive …
Architecture For Extracting Data From Vehicular Sensors, Gaurav Sood
Architecture For Extracting Data From Vehicular Sensors, Gaurav Sood
Electronic Theses and Dissertations
In this thesis we investigate an alternate source of vehicular information for collision avoidance systems and driver assistance applications, which is more accurate, reliable in all conditions and has minimum time lag. We have designed and developed an architecture, which enables us to read, analyze, decode and store the real-time vehicular data from the vehicle’s electric sensors. We have designed two algorithms for decoding the raw data read from the vehicle’s Controller Area Network (CAN) bus, to which various electric components of the vehicle are connected to communicate the real-time data. We have shown that the vehicular speed which is …
Influence Of Values And Expectations Of A Healthy Work Environment On Migration Intentions Of Nurse Graduates In A Canadian Border City, Le Xin
Electronic Theses and Dissertations
Nurse migration, in combination with a projected global nursing shortage, has been generating serious concerns. A healthy work environment, essential for recruitment and retention, was identified to influence on migration intentions. Secondary data analysis exploring the influence of values and expectations of a healthy work environment on migration intentions of two classes of nursing graduates (2011 and 2013) in a Canadian border community in Ontario, Canada was conducted. The number of students considering migrating increased approximately four percent in 2013. The majority preferred to work in Canada but were willing to migrate because of a perceived absence of valued job …
Designing, Prototyping And Investigation Of Advanced Five-Phase Axial Flux Srm For Electrified Vehicle Application, Anas Labak
Electronic Theses and Dissertations
The recent interest by the automotive industry in finding an electric motor that has high power density, rugged construction with high temperature adaptability, and fault tolerance ability has revived the research on switched reluctance motors (SRMs). Due to the aforementioned characteristics, SRM is considered an attractive alternative to traditional electric motors in electric vehicle (EV) applications. However, there are challenges such as torque ripple and acoustic noise that need to be addressed. The aim of this dissertation is to provide solutions through fundamental design improvements in order to develop a viable SRM-based propulsion system. In order to analyze and quantify …
Cognitive-Affective Processing, Sleep Quality, And Mood In Obstructive Sleep Apnea, Ciaran Michael Considine
Cognitive-Affective Processing, Sleep Quality, And Mood In Obstructive Sleep Apnea, Ciaran Michael Considine
Electronic Theses and Dissertations
OBJECTIVES : Extant experimental research implicates sleep disturbance as causal to dysregulation of emotional processes and neurocognitive functioning. Clinical research with psychiatric samples suggests that sleep disturbance may be an etiological or sustaining factor in certain conditions, rather than solely a symptom. Recently proposed models have hypothesized cognitive-affective processing (CAP) as a potential mediator for the relationship between sleep disturbance and depressed mood. This study investigated relevant neuropsychological and sleep-physiological variables to explore the applicability of this type of model within a sleep apnea referral sample. METHODS: 61 participants referred for polysomnogram also completed self-report measures of mood and sleep, …
Multi-Attribute Performance Models For Small Manufacturing Enterprises, Madani Abdu Alomar
Multi-Attribute Performance Models For Small Manufacturing Enterprises, Madani Abdu Alomar
Electronic Theses and Dissertations
Nowadays, there are huge environmental changes in the business world. These changes have resulted in tremendous growth and opportunities for new markets but also in challenges that threaten the operations and survival of firms. These competitive pressures are driving firms to re-evaluate their competitive strategies, supply chains, and manufacturing technologies in order to improve performance and survive long term. Small and medium-sized enterprises also face these challenges, which influence their operations and existence. They are significantly constrained by remarkable limitations in terms of financial resources as well as non-financial factors, such as informal strategic decisions and actions. Reports have revealed …
Plasma Process Control For Improved Peo Coatings On Magnesium Alloys, Riyad Omran Hussein
Plasma Process Control For Improved Peo Coatings On Magnesium Alloys, Riyad Omran Hussein
Electronic Theses and Dissertations
Plasma Electrolytic Oxidation (PEO) is a high voltage plasma-assisted oxidation process uses an environmentally-friendly aqueous electrolyte to oxidize the metal surfaces to form ceramic oxide coatings which impart a high corrosion and wear resistance. One of the main advantages of PEO process is that it can be applied to treat samples with complex shapes, and surfaces with different composition and microstructure. The PEO process of Mg alloys is strongly influenced by such parameters as electrolyte composition and concentration, current or voltage applied and substrate alloy. Generally, these parameters have a direct influence on the discharging behavior. The discharges play an …
Grief Experience Among Family Caregivers Following Traumatic Brain Injury: The Role Of Survivor Personality Change, Perceived Social Support, And Meaning Reconstruction, Bruce A. King
Electronic Theses and Dissertations
Although multiple aspects of psychological adjustment among individuals who provide care for a relative with traumatic brain injury (TBI) have been extensively investigated, research activity with respect to potential loss and attendant grief experience in this population has been largely circumscribed. The current project aimed to address this lacuna by investigating both the extent and predictors of grief reaction in a cross-sectional sample of 123 TBI family caregivers. The influence on grief experience of three factors in particular – viz., caregiver perceived change in the personality of the TBI survivor, caregiver perceived social support, and family member meaning reconstruction following …
Model Based Control Of A Reconfigurable Robot, Riyadh Al Saidi
Model Based Control Of A Reconfigurable Robot, Riyadh Al Saidi
Electronic Theses and Dissertations
Robots with predefined kinematic structures are successfully applied to accomplish tasks between the robot and the environment. For more sophisticated and future applications, it is necessary to extend the capabilities of robots, and employ them in more complex applications, which generally require accurate and more changeable structural properties during the interaction with the environment. The central focus of this research was to propose a robot with new properties to address the reconfigurability problem, including its feasible solutions using model based control strategies. First, these reconfigurable robots have to combine as many properties of different open kinematic structures as possible and …