bluuebunny/crossref_metadata_2025 huggingface dataset:
Reducing the strength and durability loss of high performance ready mix and roller compacted concrete due to early age high temperature curing
Authors: Sluce Richard
Published: June 2021

This thesis reports the findings of a study conducted on the effects of mixing and curing high performance concrete at elevated temperature. The purpose of the study was to find solutions to ameliorate the strength and durability loss resulting from high temperature environments. This investigation is broken down into two distinct phases. Phase I consisted of a preliminary mortar investigation followed by Phase IIa which was conducted on ready mix concrete and Phase IIb which studied roller compacted concrete. Phase IIa investigated the ability of supplementary cementing materials and chemical admixtures to mitigate the deleterious effects of curing at high temperature. In contrast, Phase IIb investigated the ability of supplementary cementing materials to reduce the deleterious effects. It was found that supplementary cementing materials were moderately effective at ameliorating strength loss, and performed well in reducing durability loss. The chemical admixtures only performed well in ameliorating strength loss.
Study of a self-scouring outfall in Lake Ontario by physical and computer modeling
Authors: Persaud Shanil
Published: June 2021

Coastal outfalls that discharge storm water and/or sewerage into bodies of water are part of a collection of critical municipal infrastructure that must be kept functioning properly at all times so as to avoid expensive frequent maintenance and environmental problems. The Green Road costal outfall pipe, located in an embayment on the shores of Lake Ontario in the City of Hamilton, is subject to sediment plugging by waves that transport sediments from an eroding bluff to the east into the study outfall pipe, thereby reducing its hydraulic discharge capacity. To alleviate the problem of outfall blockage, a 1:15 scale undistorted physical (hydraulic) model ws designed and built at the National Water Research Institute (NWRI) to study the performance of a self-scouring outfall (SSO), a structure that utilizes combination of wave run-up slopes, converging walls and steep outlet channels to promote self-cleansing with respect to sediment to prevent direct sediment intrusion into the outfall pipe. A commercial computational fluid dynamics (CFD) model FLUENT, was used to study the internal hydrodynamics of the complex outfall structure. Results from the physical model determined that the performance of the SSO is a function of wave direction, water level, wave height and period, as well as sediment characteristics. Model results indicate that a SSO built on the shores of Lake Ontario would be able to scour a greater amount of sediment in conjunction with a high water level and wave height of 75.07 m and 1.95 m, respectively. A modified SSO design reduced sedimentation on the wave run-up slopes by more than 25% and was 100% effective in preventing direct sediment intrusion. The structure performed exceptionally better than a traditional outfall in terms of sediment handling. Therefore, it is expected a municipality can save a great deal of money on cleanouts by installing a self-scouring outfall to prevent outfall plugging.
The digital exhibition defined: The M.O. Hammond Collection
Authors: Bognar Madeleine Anne
Published: June 2021

This thesis consists of a digital exhibition presented online at:

http://ppcm2017-hammondexhibition.myfreesites.net/.
This digital exhibition is used as a case study for the written component. As such it outlines the criteria that attempt to define digital and virtual exhibitions in 2017. The case study is analyzed alongside research from cultural and historical
institutions and interviews with professionals in Canada and the United States. These interviews and research provide insight into how different institutions approach the worldwide interest of digital exhibitions. This thesis not only examines the criteria of digital exhibitions but also analyzes the success of the case study created for this project. Appendices included in this thesis outline the digitization process, image selection information, web text and layout used during the creation of the case study digital exhibition.
Survivability in ATM networks
Authors: Ma Guangyan
Published: June 2021

In ATM network design, self-healing is the ability of the network to continue to provide service in the event of failures, and this compromises both planning and operational aspects. The planning aspect involves optimal/near-optimal network design problems while the operational aspect deals with the implementation of protection schemes using restoration mechanisms, for allocating spare capacity to the network to be used in case of a failure event. This project investigates the survivability (i.e. restoration ratio) - here defined by means of the aggregate restoration ratio - in existing ATM networks based on various spare capacity distribution schemes, with the goal to (1) compare the network survivability for link and path restorations, and (2) determine the effects of various traffic and design related patterns on the restoration ratio.
Interpretation of denim by haute couture designers
Authors: Mukhopadhyay Soumojit
Published: June 2021

This study identified how three high-end couturiers (Dolce & Gabbana, Versace, and Jean Paul Gaultier) incorporate denim in their menswear lines and impose their individual and unique design philosophies or brands,” defined here as an amalgam of the couturiers’ tangible and aesthetic characteristics. The study chose to focus on denim because of its use in the design and production of jeans, one of the most popular articles of casual wear globally. The study compared the couturiers’ output with similar developments in other luxury brand categories, and combined visual and mathematical analysis to clearly identify the couturiers’ signature designs. Study findings may be useful to future designers creating new products.
Identifying Barriers to Reducing Ontario’s Construction Waste Through Reclamation, Reuse, and Recycling
Authors: Earle Joseph Martin
Published: June 2021

Construction, renovation, and demolition waste contributes at least one quarter of all waste that is destined to landfill and incineration in Canada. This research hypothesized that residential renovations could play a significant role in decreasing the amount of waste through reuse of used building materials. It therefore sought to identify barriers to recycling, reclamation, and reuse of building materials in the Ontario construction, renovation, and demolition industry. Through a mixed-method survey of green building professionals five primary barriers were discovered. With greater leadership from green building professionals, materials and markets becoming more consistently available, and more buy-in from residential contractors and homeowners conducting renovations these barriers can be overcome and this type of project can help contribute to reduction of construction, renovation, and demolition waste in the province
Improving Performance and Durability of Concrete
Authors: Nazeran Mohammad R.
Published: June 2021

Concrete is a porous material with different size of pores and cracks. Even the high quality concrete is a porous material which can pass the water through its cement paste. Porosity of the concrete can affect the natural performance of the concrete structure. Usually the water that comes from the environment contains the soluable contaminates which may initiate the reaction with the concrete materials and reduce the serviceability and design service life of the concrete.

Durable structures to withstand significant deterioration can help to reduce the maintenance problem and conserves energy, money, materials and resources. The purpose of this research is to determine the major durability problem of concrete structure. The effects of critical environment deterioration such as sulfate and chloride attack was studied. Also the use of recycle and new material that might offset the destructive effects of environment attack to improve the durability or reduce the permeability was investigated.
Network screening for specific collision types at urban signalized intersections - conventional and spatial methods
Authors: Wong Wai Kei Felix
Published: June 2021

Transportation authorities are always looking for ways to improve road safety since vehicle collisions cost Canada 25 billion dollars of capital loss and around 2800 deaths each year. An important step in improving road safety is to sieve out the problem sites through network screening processes. screening for specific accident types is discussed in this thesis, using signalized intersections in Toronto in an illustrative application. each such collision type is associated with corresponding countermeasures, which allows the engineer to rank the entities with specific remedies in mind. In this way, the effectiveness of road network screening can improved through targeted treatments. Three different screening methods are introduced and compared; procedures for selecting entities from screening results by different methods are also presented. A process for ranking jurisdictions by regions is proposed. This is a method which combines the conventional network screening techniques with geographic information system (GIS) tools. The GIS can integrate the spatial information of a selected area with the conventional accident and road characteristic data and facilitate network screening by region.
Attraction and Retention of Immigrants in Small Centres: The Case of Kingston, Ontario
Authors: Thurston Sarah
Published: June 2021

Rising concern over the large number of immigrants who have settled in Canada’s three largest municipalities (Montreal, Toronto, and Vancouver) in the last two decades, has combined with recent concern over economic decline in some of Canada’s less populated regions to create a push for an increase in municipal government responsibility for issues related to immigration. This has sparked a trend in small municipalities taking action to increase their ability to attract and retain newcomers to their area. This paper explores this process through a case study of Kingston, Ontario, using 2001 and 2006 Census data and interviews with key informants in the community. Analysis of a number of factors in Kingston related to immigrant needs and community attitudes, resulted in the conclusion that this third-tier municipality is in the beginning stages of taking appropriate steps towards the sustainable attraction and retention of immigrant residents.
The visual politics of success and solidarity a case study of Chris Niedenthal's photography from The People's Republic of Poland 1978-1982
Authors: Laszcuk Katarzyna
Published: June 2021

This thesis focuses on photographs from the Black Star Collection by photojournalist Chris Niedenthal, who did freelance assignments in Poland for Newsweek, Time Magazine, and Der Spiegel during the 1970s and 1980s. By looking closely at Niedenthal’s work, this thesis explores how these photographs respond to and engage with the rising tension in the People’s Republic of Poland (PRL) between the years 1978 -1982. The purpose of this investigation is to study the techniques Niedenthal devised to photograph Poland during a volatile time. Through a comparative analysis of selected images from the Black Star Collection, this thesis considers two phases of Niedenthal’s work in Poland, and examines both the way Chris Niedenthal’s photography attempts to negotiate the restrictions imposed by a totalitarian political system that sought to control its self-image, and how his approach to photography adapted to the rise of the Solidarity Trade Union and imposition of Martial Law in Poland.
The social construction of masculinity and boys' struggles in school: a content analysis of children's TV shows
Authors: Grzeslo Caitlin
Published: June 2021

The gender gap in education has been widening over the years as girls push ahead, and boys lag behind. Various factors are considered when attempting to explain this trend as well as how it can be addressed. This study focuses on the role of media, specifically children’s TV shows, how they portray masculinity and how those portrayals may shape boys’ identities and behaviour in school. A content analysis of six boys’ television shows has been conducted to document some of these messages. With the exception of one show, overall findings illustrate that the television shows included in this study do not represent a range of masculinities, providing limited messages to young viewers. This study does not assess the direct relationship between these messages and behaviour in the classroom but considers one possible explanation for the gender gap, and makes suggestions aimed at transforming practices in the classroom. Even with research suggesting the need for exposure to different types of masculinities, such issues cannot be addressed until society believes that young boys need encouragement and support in forming their own individual gender identities. Keywords: boys; education; gender; gender gap; masculinity; television.
Finite element analysis of freezing effect on soil nail wall
Authors: Babaei Milad
Published: June 2021

This study presents a finite element analysis on the behavior of soil nail walls subjected to different freezing and thawing conditions. Thermo-mechanical coupled analysis has become increasingly important due to the increasing number of geotechnical structures built in cold regions. Soil nailing is a relatively new technique of reinforcing existing slopes or supporting new excavations. Its performance has been proven through decades of successful applications throughout the world. However, its applications in cold regions are still very limited due to sparse research available on its behavior in cold regions. In addition, soil may dramatically change its properties after
experiencing freezing and thawing cycles. A two-dimensional finite element analysis using ABAQUS software is conducted to investigate the frost penetration depth in the soil and the resulting influence on the performance of the soil nail walls in Northern Ontario. The numerical model is verified against the field measurements obtained from a research program done in Brunswick, Maine, U.S. (Duchesne, 2003). The change of thermally induced stress along soil nails as well as the increase of displacements and earth pressure on the facing of the walls is investigated
under freezing conditions. A parametric study is also conducted to probe the effect of thermal insulation systems on the wall facing and nails. This study provides valuable insight into the behavior of soil nailed structures in cold regions.
Seismic response of reinforced concrete elevated water towers.
Authors: Nazari Aren
Published: June 2021

Modern composite elevated storage tanks were developed in late 1970's in response to increasing demand for a reliable, economical and low-maintenance water storage system in Canada and the U.S. The popularity of composite elevated water towers rose tremendously in the last 30 years, as the new type of construction offered many advantages over traditional elevated water storage tanks. Despite the increasing rate of construction, the performance of this type of structure under ground motions is not fully understood. During the recent earthquake of Bhuj 2001, many shaft staging elevated water towers experienced severe damages, signifying the lack of considerable ductility, redundancy and energy dissipation in the system.

This thesis investigates the current approach to the design of shaft staging elevated towers, and also summarizes a comprehensive literature review of structural theories, latest research and studies. The response of a selected concrete shaft staging elevated tower, designed according to the currant [sic] practice and subjected to gradually increasing lateral load was investigated through a non-linear static finite element analysis. Additionally, the seismic performance of the structure during four different ground motions with various peak ground accelerations was studied through several time-history non-linear finite element analyses. The results of static and dynamic finite element analyses were used to evaluate and establish the response modification factor used for design of these types of structures.
Innovative approach for automatic land cover information extraction from LiDAR data
Authors: El-Ashmawy Nagwa Taha Hamdy
Published: June 2021

An airborne laser scanning (ALS) system with LiDAR (Light Detection and Ranging) technology is a highly precise and accurate 3D point data acquisition technique. LiDAR technology has been extensively used in digital surface/terrain modelling (DSM/DTM), and related applications such as 3D city modelling and building extraction. The capability of LiDAR systems to record the intensity of the return laser pulse backscattered energy in addition to the range data has motivated researchers to investigate the use of LiDAR intensity data for extracting land cover information.

The main goal of this research is to maximize the benefits of the use of LiDAR data independently of any external source of data for automatically extracting accurate land cover information. Several new approaches are introduced in this research: a) classifying and filling the LiDAR intensity point cloud to produce a land cover image, b) combing multiple classified data of multiple LiDAR data-strips, c) statistical analysis segmentation technique that uses the concept of the kurtosis change curve algorithm for automatic classification of LiDAR data, and d) accelerating the classification process of large datasets by partitioning the large datasets into small, manageable datasets. Applying the traditional image classification techniques on LiDAR elevation and intensity data exclusively is included. Pixel-based, object-based, and point-based classification logics are conducted, and their results are compared to reference data.

The results indicated that LiDAR data (range and intensity) can independently be used in land cover classification. By applying traditional pixel-based, supervised image classification techniques, the classification results show that auxiliary layers, which are extracted from range and intensity data, can be used for land cover classification. However, applying the supervised classification techniques on the LiDAR point cloud data without converting the data into images (Point-based logic) produced more accurate land cover classification results. The experiments on the proposed classification approach using the statistical analysis segmentation technique (based on the concept of the kurtosis change curve algorithm) show that it can be used to classify LiDAR data for land cover mapping.
Importance analysis of fault trees by visual inspection
Authors: Bains Gurvinder Kaur
Published: June 2021

To achieve high reliability for any system, it is necessary to identify the components and the subsystems that have the greatest impact on its reliability. Such items can be identified using importance measures that rank the items quantitatively according to their contribution to the system unreliability. Taking into consideration the complexity and time involved in computing these measures we have proposed an algorithm that can pinpoint the most important component just by visually inspecting the fault tree. Calculations whenever required, involve simple arithmetic. It gives the user freedom from the complex calculations, save their time and performs the intended task without the use of software tools. Then the generalization of this work has been proposed that ranks the components of the fault tree. We have illustrated both the algorithms for the fault trees without as well as with repeated events.
Visual Studies Workshop Press : a website description of process-based and experimental books
Authors: Griffin Erin
Published: June 2021

This applied thesis project deals with a selection of fifty books published by the Visual Studies Workshop (VSW) Press in the 1970s and 1980s. The selection of books can be found in the Independent Press Archive that is currently held in the Research Center at the Visual Studies Workshop (VSW) in Rochester N.Y. The objective for this applied project is to facilitate access and describe the selection of books through the construction of a website. The thesis is divided into two parts, a website description of the books and an analytical paper. The website will allow for visual access to some important experiments with the book format, analog experiments that were revolutionary in their time. The analytical paper includes a discussion of the decisions made while selecting and digitizing the books for the website. This thesis project will add to the current knowledge about VSW Press by providing a snapshot view of how the book format was utilized by artists and students working at VSW at a particular moment in history, a historical period in which photography media and publication were undergoing a time of remarkable growth.
Durability of concrete containing aggregate produced from recycled concrete affected by alkali-silica reaction
Authors: Christidis Chris
Published: June 2021

Minimal information is available on the durability of concrete containing demolished concrete as an aggregate. The purpose of this study was to: investigate and control the reactivity of recycled concrete aggregate (RCA) produced from concrete that was suffering from alkali silica reaction (ASR); and investigate other durability issues of concrete containing RCA with emphasis on salt scaling and freezing & thawing. It was deduced that the RCA produced from ASR-affected concrete caused expansion when used in new concrete as an aggregate. This high reactivity of the tested RCA was attributable to its relatively high alkalis and calcium contents. Furthermore, a greater amount of SCM was required to reduce expansion compared to concrete containing raw natural reactive aggregate. In terms of freezing and thawing and salt scaling, concrete containing coarse RCA at a 100% replacement level of coarse aggregate showed lower durability compared to concrete made with natural coarse aggregate.
Comparison of analysis techniques for the seismic evaluation of an 88-storey concrete building
Authors: Shaffu Andrew
Published: June 2021

This thesis presents the comparison of results for an 88-storey reinforced concrete building subjected to static and dynamic analyses. Similar to a building designed in a moderate seismic zone, the structure is designed and detailed according to the ACI 318M (2002) Code provisions and the seismic provisions of the UBC (1997). The building is modeled according to structural drawings and element design specifications are used in describing members' deformation characteristics. Resistance to dynamic motion is provided through boxed core-wall assemblies acting as cantilevers walls in one direction and linked with coupling beams at storey levels in the orthogonal direction. The equivalent static, dynamic modal spectrum, linear time-history and nonlinear time-history analyses are employed and a comparison of maximum inter-storey drift response is provided. The results of the analyses show that the linear time-history analysis is the most appropriate method in capturing the behavior of this particular building under dynamic loading.
Perceptions of family involvement and cultural responsiveness in early childhood education
Authors: Coulthard Cathy
Published: June 2021

This study explores 30 early childhood professionals' and 31 family members' perceptions or practices associated with eliciting and fostering culturally responsive family involvement in the High/Scope approach to Early Childhood Education, and identified, research-based model of early childhood curricula. A non-experimental cross-sectional survey design was used to gather data in three different High/Scope programs related to the role of culture, the curriculum model, family involvement practices and the perceived differences of these practices by the early childhood professionals and the family members. The results suggest that both participant groups are aware of family involvement practices that strive to acknowledge the diverse contextual lives of children lending support to initiating culturally responsive practices in early childhood settings.
Hydraulic Analysis of Oil Spill Control Systems in Transformer Stations
Authors: Fan Celia
Published: June 2021

Electrical transformer stations use transformer oil to increase the efficiency of the electrical voltage transfer and to reduce the moisture and air in an electrical transformer. Each year, there is a high probability of spilling the transformer oil accidentally into the environment. Some spill events contain large volume of transformer oil. The objective of this thesis is to investigate oil spill control systems for spilled transformer oil during all operating and weathering conditions at a Hydro One's transformer station near the city of Burlington. This thesis examines the design of (1) oil trap systems which trap the spilled transformer oil and (2) the oil back-up systems thick back up the transformer oil spills to the transformer station. This research focuses primarily on Hydro One's transformer stations and the normal operation conditions in Ontario.
Dialectics of exclusion/inclusion and the naturalization of bonded labour : media representations of migrant workers in Canadian mainstream media
Authors: Inouye B Kimiko
Published: June 2021

This research examines the ways in which migrant workers are represented in mainstream Canadian news print press. In particular, representations of domestic workers and farm workers are the focus of analysis. This analysis is helpful in revealing the extent to which Canadian nation-state interests, including neo-liberalism and nationalist multicultural sentiment, are articulated within the discourses of the mainstream newsprint media. Emphasized is how neo-liberalism operates within a nation-state where the dominant discourse of multiculturalism is predominant. Overall this research demonstrates that the acceptance of migrant workers is conditional. This type of acceptance is characterized by their limited existence as economic participants in the Canadian economy, and their especially oppressed experiences as social and political participants. Overall this research demonstrates that within the mass media, as one component in the larger discourses of neo-liberal capitalism and multicultural tolerance, the subjectivity and agency of migrant workers goes hugely unrecognized.
Between The Symbolic And The Sublime : Slavoj Žižek In Film Studies ... And Out
Authors: Flisfeder Matthew
Published: June 2021

The following dissertation examines film theory' s contribution to the Marxian theory of ideology. I argue that while early film theorists sought to develop a theory of film, film theory better serves the study and critique of ideology. I claim that the study of film and spectatorship can add to knowledge of ideology and subjectivity. To this end, I examine the relevance of the Slovenian philosopher and psychoanalyst, Slavoj Žižek, for contemporary film studies. I locate Žižek's place within film studies through a debate between himself and the prominent American film scholar, David Bordwell. Bordwell is well known for his advocacy of cognitive and middle-level research in film studies, and for his criticism of film theory (or, 'Theory'). He is one of the leaders of a movement in film studies known as post-Theory. I take up the debate between Žižek and Bordwell, and argue that the post-Theory rejection of Theory is an ideological effect of the class struggle.

After carving out a place for Žižek in film studies, I examine the relevance of his psychoanalytic interpretations of cinema for a critique of ideology. Žižek is known for using examples from films as tools of exegesis for an interpretation of Lacanian psychoanalysis. However, I argue that while this is true for some of his writing on film, Žižek also practices a psychoanalytic interpretation of cinema that reveals something about the function of ideology. Referring to Žižek, I also argue against early film theorists who thought it possible to interpellate political subjectivities through alternative or avant-garde cinema. In contrast, I argue that the work itself in not powerful enough to interpellate political subjectivity. It is, rather, the interpretation that politicizes the work. I claim that films do not create subject-positions, as early film theorists argued; rather, they reproduce the already existing subject-positions of the spectators by reproducing pleasure or desire. However, without rejecting the efforts of early film theory, I conclude, against Bordwell and other post-Theorists, that Theory is still important in film studies, particularly in the area of political critique, and that Žižek's work is exemplary of the kind of political criticism needed in film studies.
Collingwood’s philosophy of art as a basis for virtue aesthetics.
Authors: Collins David
Published: June 2021

In this thesis I show how Aristotle’s approach to ethics can be applied to aesthetics in order to address normative concerns relating to practices of artistic creation and spectatorship, and how R. G. Collingwood’s philosophy of art provides an understanding of these practices that works as a basis for such an approach. I begin by discussing the connection between aesthetic and ethical normativity as found in the thought of various prominent philosophers, and review the contemporary work done in the name of ‘virtue aesthetics’. I then explicate Aristotle’s ethics, with a particular focus on his definition of virtue and his discussion of practical wisdom, and give an overview of Collingwood’s understanding of art and the role of imagination in artistic expression and understanding, before synthesizing the structure of Aristotle’s ethics with the content of Collingwood’s philosophy of art in order to arrive at an outline of a Collingwoodian virtue aesthetics.
Observational Before and After Safety Study of Installing Signals at Rural Intersections: Using the Empirical Bayes (EB) and Conventional Methods
Authors: Bhim Ravindranauth
Published: June 2021

Signalizing an intersection usually results in a reduction in right-angle and left-turn crashes, and an increase in rear-end crashes. This study used the conventional and Empirical Bayes (EB) before and after methods on 45 treated sites (converted from stop to signal control) in California and Minnesota to estimate the safety effect of having signals installed. The results confirm the belief that right-angle and left-turn crashes are reduced and rear-end crashes increase. However, these effects cannot be used to quantitatively assess the benefit gained from the reduction in right-angle and left-turn crashes against the increase in rear-end crashes, simply because crash types have different severities. By performing an economic examination of the safety effects, this study was able to show that by installing signals on 45 treated sites, there was a positive aggregate economic benefit of $155,883,978 which represents a 69 percent reduction in cost. This translated into $616,142 per site-year.
Shear Distribution in Curved Composite Multiple Box Girder Bridges
Authors: Hassan Walid I.H.
Published: June 2021

Horizontally curved composite box girder bridges are used in interchanges of modern highway systems. This type of structure has created design problems in estimating its live load. North Americans Codes of Practice recommends some analytical methods for design of such curved bridges. However, practical requirements arising during the design process necessitate a simple design method. On the basis of the literature review, such load distribution factors due to CHBDC truck loading are as yet unavailable. An extensive parametric study, using the finite-element modelling, was conducted, in which 225 prototype bridges were analysed to evaluate their shear distribution factors when subjected to CHBDC truck loading conditions. The parameters considered were number of steel boxes, number of lanes, span length, and span-to-radius curvature ratio. Based on the data generated, empirical expressions for shear distribution factors were deduced. An alternative to the developed expressions were introduced using the Artificial Neural Network (ANN) application.
The experimental study of aerodynamic characteristics with wing flexibility for hawkmoth-like wings in hovering flight
Authors: Ryu YeongGyun
Published: June 2021

An experimental study on flapping wing flexibility in hovering flight has been conducted to investigate the wing flexibility for insect-inspired flapping Micro Aerial Vehicles (MAVs). Hawkmoth-like wing models, derived from Manduca sexta, were made of Polycarbonate (PC) sheet with a spanwise length of 200 mm and an aspect ratio of 6.18. For the distributions of wing flexibility, the wing thickness was selected as the design variable: rigid wing (3 mm-thick) and flexible wings (2, 1, 0.8, 0.5, 0.35, 0.2, and 0.1 mm-thick). In the experiment, the wing models were constrained to the symmetrical and sinusoidal flapping motions with sweeping and rotating amplitudes of 120° and 90° in water tank with size of 3.5 m×1.0 m×1.1 m. Aerodynamic force and flow structures for flapping the wing were measured using a six-axis force/torque sensor and a high speed camera with a laser using Digital Particle Image Velocimetry (DPIV). To compare the flow structures of flexible wings with rigid wing, they were captured at the same chordwise cross-section as the rigid wing, 50% of wing length. Based on the experimental results, vortices and aerodynamic force. Consequently, the wing with thickness of 0.8 mm has better aerodynamic characteristics than other wings in hovering flight. This finding will be instrumental in identifying the range of wing flexibilities that improves the aerodynamic efficiency for the development of insect-inspired flapping MAVs.
Control of satellites using environmental forces : aerodynamic drag / solar radiation pressure
Authors: Varma Surjit
Published: June 2021

The dynamics of a satellite involves orbit and attitude motion. Both orbit and attitude motion are required to be controlled for achieving any mission objectives. This thesis examines both of these motion with a focus on formation flying and attitude stabilization using aerodynamic drag or solar radiation pressure. The concept of satellite formation flying involves the distribution of the functionality of a single satellite among several smaller, cooperative satellites. Autonomous multiple satellite formation flying space missions offer many promising possibilities for space exploration. A large quantity of fuel is typically required onboard any conventional satellite to carry out its attitude and orbital positioning, and satellite formation flying has a higher fuel requirement. As on-board fuel is a scarce commodity, it is important to have control methods requiring little or no fuel. Keeping this in mind, this thesis presents the results of using aerodynamic drag or solar radiation pressure for satellite formation flying. This methodology has potential to have significant commercial advantage as it pertains to almost negligible fuel requirements. A leader/follower formation architecture is considered for the formation flying system. The control algorithms are derived based on adaptive sliding mode control technique. Aerodynamic drag is used to accomplish multiple satellite formation flying in low Earth orbit whereas solar radiation pressure is used in geostationary orbit. Due to the nature of the aerodynamic drag, in-plane control can only be accomplished by the suitable maneuvering of the drag plates mounted on the satellites. Solar radiation pressure is able to accomplish in-plane and out-of-plane control by maneuvering of the solar flaps. Efficacy of the control methodology in performing various scenarios of formation flying including formation reconfiguration is validated by numerical simulation in both the cases. The numerical results demonstrate the effectiveness of the proposed control techniques for satellite formation flying using aerodynamic drag or solar radiation pressure. Formation flying accuracies of less than 5 m are achieved in both the cases. Next, this thesis investigates the use of aerodynamic drag or solar radiation pressure for satellite attitude control. In the case of the aerodynamic drag stabilized satellite, the drag plates are considered to be attached to the satellite while the solar flaps are fixed to the satellite in the case of the solar radiation pressure stabilized satellite. In both the cases, the control algorithm is developed based on adaptive sliding mode control technique. The effectiveness of this methodology is numerically evaluated under various scenarios including the pressure of failure/fault in the solar flaps or drag plates attached to the satellite. The satellite attitude is stabilized within reasonable limits in all the cases thereby demonstrating robust performance in the presence of external disturbances.
Acting in the Name of Culture? The Participation of Organized Labour in the Canadian Broadcasting Policy Process
Authors: Coles Amanda
Published: June 2021

The thesis examines the role, efficacy and influence of the five national English-language independent film and television production sector unions in the Canadian broadcasting policy network. While labour is typically classified as a civil society organization within policy networks studies, this thesis will examine the blanket applicability of this typology in analysing labour's engagement with issues that involve both their vested economic/industrial interests as well as broader social/cultural goals, using the unions' engagement with the issue of Canadian dramatic programming from 1998 to present as a case study.
Elastic properties of cement phases using molecular dynamic simulation
Authors: Arar Mohamed
Published: June 2021

The goal of this thesis is to shed light on the elastic properties, especially the Young modulus, of clinker phases and hydration products of cement paste through molecular dynamic simulation by COMPASS force field. The parameters that can affect the elastic properties of cement phases were also targeted, with special attention paid to analog C-S-H minerals, in which the Tobermorite family and Jennite were simulated to render their structures representative of C-S-H structure.

The molecular dynamic simulations of this study show that CO force field can be applicable for most clinker phases and hydration products. Jennite, with its porosity and finite silicate chain accounted for, can be considered the closer and representative structure of C-S-H. In addition, this study confirms the important effect of C/S ratio, packing factor and chain length on elastic properties of C-S-H.
Structural Performance And Self-Healing Behaviour Of Engineered Cementitious Composites Subjected To Fatigue Loading
Authors: Ahmad Shirin
Published: June 2021

This research investigates the effect of fatigue loading on the flexural performance and self-healing behaviour of beams and link slabs made of Engineered Cementitious Composites (ECC). The influences of fly ash content, types/size of sand, MgO agent, fatigue stress level/cycle and age are analyzed based on strength/deflection capacity recovery and residual strength/deflection/energy absorbing capacity. The deflection evolution rate and energy absorption capacity were much higher in ECC link slabs compared to their SCC counterparts. Higher energy absorption and deflection evolution rate were observed in mortar sand based ECC specimens during fatigue loading. ECC link slabs with mortar sand having 55% fly ash content have shown the best self-healing and fatigue performance attaining high residual strength, deflection and energy absorbing capacity of up to 98.3%, 95.4% and 97.1% of control specimens, respectively besides retaining multi-cracking characteristics. This research demonstrates viability of using ECC link slab for construction of joint-free bridges.
Evaluation of the positional accuracy of subsurface utilities
Authors: Santhakumar Vijayaluxmy
Published: June 2021

Since WWII, the urban underworlds have become a web of utility lines, including telecommunication lines, buried electricity lines, gas mains, watermains, cable TV, fiber optic cables, street lighting, and storm and sanitary sewers. From preliminary design stages to breaking ground on new construction projects; owners, designers, engineers, and contractors rely on existing underground utility records as an initial source of information. There is a constant need for underground utility information and most of the city's existing utility records are not only irretrievable, but are also out-of-date. According to research done in the past, records and visible feature surveys by site are a significant percentage off the mark and, in some cases, considerably worse. This study focuses on the evaluation of the positional accuracy of subsurface utilities within seven projects, within the City of Toronto, using an offset approach. It also aims to reveal the magnitude of the problem surrounding the obtainment, analyzation, and interpretation of information with respect to underground infrastructure facilities. None of the projects show any relationship or correlation with positional accuracy and the factors that are thought to affect the accuracy of underground utility information (e.g. type of soil, type of utility, date of installation, right-of-way, etc.). The analysis indicates a clear indication of no systematic patterns between the right-of-way parameters and utility type parameters. Based on the results of this study it can be stated that the process of obtaining subsurface utility information is still a time-consuming, inefficient, costly, and difficult process.
Structural repair on a composite aircraft fuselage damaged by fire.
Authors: Cosentino Christopher D.
Published: June 2021

Composite materials have been used on aircraft for decades with tremendous benefits. Through the use of these advanced materials we have seen a great increase in the aircraft’s efficiency, while improving the strength of the aircraft. Unfortunately due to the complexity of this material, it has not been used in large structural components such as the fuselage until very recently. Because of this, there are still some unknown aspects of implementing this material which have not yet been researched. One example that demonstrates this is a large section of an aircraft’s composite fuselage structure which has sustained fire damage. The main difficulties here are the unknown extent of damage caused by the fire, the unproven repair methods, and the durability of the repair patch itself. This report outlines some of these challenges as well as offers two different repair methods that are then analyzed using CATIAs FEA suite.
Lartigue before Lartigue : the GEH [George Eastman House] album Paris aviation 1910
Authors: Heath Charlene N
Published: June 2021

This thesis discusses the Jacques Henri Lartigue album Paris Aviation 1910, which is held in the collection of photographs at George Eastman House International Museum of Photography and Film (GEH). It established Paris Aviation 1910 as the only remaining album Lartigue made prior to constructing his large albums and reconstructing them after his solo exhibition at the Museum of Modern Art (MoMA) in 1963. This thesis also raises questions regarding the provenance of the album and the authorship of the images it contains.
A Tour Through Scotland: A Finding Aid of Scottish Tavel Photography at the Archival & Special Collections, University of Guelph
Authors: McAllister Danielle
Published: June 2021

Among the various collections housed in the Archival & Special Collections (ASC) at the University of Guelph is a group of photographic material that exhibits the integral role photography played in Scotland’s tourism industry from the nineteenth and early twentieth centuries. Photographic publishing firms such as G.W. Wilson & Co. and Valentine & Sons, Ltd. incorporated photography into their commercial repertoires and both helped to create and capitalize on Scotland’s vibrant tourism industry during this period. This thesis focuses on this specific group of material that includes four bound albums, five opalines, seven travel view books, and over four hundred stereographs, and additionally looks at how institutions such as the ASC use descriptive tools like finding aids to provide access to and information about their collections. This thesis project reevaluates the structure and role of the finding aid as applied to photographic material in archival collections. Additional components such as a biographical sketches, a glossary of photographic terms, a geographic index, and a historical overview, have been incorporated to further demonstrate how a finding aid can build a greater web of connections and narratives for such collections.
The Effect of pH and Hydraulic Retention Time on Production of Volatile Fatty Acids from Primary Sludge Anaerobic Fermentation
Authors: Hyder Umme Sharmeen
Published: June 2021

Primary Sludge (PS) from wastewater treatment plants contains high biodegradable organic matter and therefore can be used to produce Volatile Fatty Acids (VFAs). The produced VFAs can be utilized in biological nitrogen and phosphorus removal processes as an external carbon source. The objective of this research was to investigate the effect of pH and hydraulic retention time (HRT) on the production of VFAs from PS through the anaerobic fermentation process. The experiments were conducted in both batch and semi-continuous flow regimes using bench scale fermenters under the mesophilic temperature. The Design of experiments included the HRT of 1 – 3 days and pH range of 4.5 - 11.0 for batch and 4.5 - 6.5 for semi-continuous modes. According to the obtained results, the VFAs production increased with an increase in HRT from 1 to 3 days. For the batch study, the pH range for maximum VFAs yield was pH 6.5 –10.0 achieved at HRT of 3 days. For the semi-continuous study, the maximum amount of VFAs production was observed at a pH of 6.5 and HRT of 3 days.
The missing links to developing holistic aboriginal early childhood services in Canada : a critical literature review
Authors: Brophy Rachel
Published: June 2021

This critical literature review explores the concepts of language, literacy and indigenous knowledge in relation to aboriginal early childhood development in Canada. Recognized is the urgent need for action in aboriginal communities and the connection between language, cultural identity and health. The review provides a synthesis of findings including a discussion of challenges, options and recommendations and a summary of themes. The critical content analysis is based in holistic principles of child development and identifies what is missing, ambiguous, and confusing within the literature and takes an advocacy stance on behalf of aboriginal children and families. The conclusion integrates ideas from the analysis into a statement of needs for future literature that will contribute to improving aboriginal child health and development. The most important findings are the need for clarity and consistency of terminology, the need to focus on children, and the need to include family voices in future literature.