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2012 — Cognitions in Non Life-Threatening Traumatic EventsRésumé
Posttraumatic stress disorder (PTSD) is a debilitating condition associated with diffuse impairment and distress. The onset of PTSD requires a traumatic stressor, an event in which an individual experienced or was confronted with death, serious injury, or threat to bodily integrity. An emerging research literature has demonstrated that some stressors, while not necessarily life-threatening (e.g., divorce), may provoke intense posttraumatic stress reactions and hallmark PTSD symptoms (e.g., flashbacks, sleep disturbance, emotional numbing; Carleton, Peluso, Collimore, & Asmundson, 2011). Associations between experiencing PTSD-like symptoms in response to non lifethreatening stressors have been documented; however, this area remains both controversial and relatively … Lire la suite
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2012 — Cyclization modes in type III polyketide synthases and the synthetic compounds used as probes for mechanistic studies.Résumé
Type III polyketide synthases (PKS) catalyze different cyclization reactions of linear polyketide intermediates to produce polyketides with distinct ring structures. The mechanisms of pyrone and resorcinol ring formation in type III PKSs remain unknown, despite many years of research on this family of enzymes. Compounds, thought to be intermediates in these enzyme reactions, have been synthesized and used to probe the enzyme mechanisms. To study the mechanism of resorcinol ring formation catalyzed by STS and ArsB, triketo acids and 9-phenyl-3,5,7-trioxo-8-nonenoic and 3,5,7-trioxoeicosanoic (16a and 16b) and their structural analogs were synthesized. STS failed to produce any cyclized products from the … Lire la suite
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2012 — Co-Creating Spaces: A Narrative Inquiry into Belonging, Identity, and Curriculum Making Within Schools,Résumé
This narrative inquiry (Clandinin & Connelly, 2000) inquires into the lives of three teachers, Anne-Marie, Lucy, and me. As three co-researchers we inquired into our stories of experiences which we lived out as children and youth as we participated in art making spaces in school. Throughout our research conversations we shared artistic representations of our experiences. Each of these conversations was audio taped and highlighted tensions we experienced in schools. This unfolding sharing of our stories of experiences led Anne-Marie, Lucy, and me to create visual art pieces that represented the vital place of art making experiences and spaces as … Lire la suite
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2012 — Granivory and Granivores in Native Grasslands and Agropyron Cristatum Stands in the Northern Great PlainsRésumé
Agropyron cristatum (crested wheatgrass) is a management concern in the northern Great Plains because of the low plant biodiversity and high stability in A. cristatum stands. Small consumers have the potential to contribute to A. cristatum invasion and stability through granivory and herbivory. Little is known about ant species composition in the Northern Great Plains. I quantified seed removal rates, granivore seed preferences, and ant communities in paired native grasslands and A. cristatum stands. I examined temporal variation in vegetation factors that influence granivory rates. Finally, I determined the relationship between seed size and vertebrate granivore preferences in herbaceous and … Lire la suite
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2012 — Quantification of Amine Loss in the Post Combustion CO2 Capture ProcessRésumé
During the process of CO2 capture using amine solvents, there is a certain amount of solvent loss. Amine vapourization has been categorized under such solvent losses. A systematic approach is required to determine such losses. This study aims at quantifying amine vapourization loss for current operating plant conditions by an in-house process model using excel. Experimental data was generated for a binary solution of monoethanolamine (MEA) + water (H2O) in a range of 1-7 kmol/m3 at 80oC using a Swietoslawski Ebulliometer. At this low concentration range of MEA, the correlation between activity coefficient and the concentration of MEA obtained was … Lire la suite
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2012 — Reliable Bandwidth Conservative Queue-End Detection and Warning System Using Smart Phone Collaboration TechniquesRésumé
The goal of this thesis is to ensure public safety. Two of the major components of public safety are: threat detection and notification. This thesis provides threat detection through sensor networks, collaboration of devices, and notification through three types of warning messages using cell broadcast technology. Most emergency conditions, be it natural or manmade, either directly or indirectly create congestion both on the road and in the telecommunication network. The more severe the road congestion is, the more vulnerable the tail end of the congestion is to rear end collisions. In order to avoid rear end collisions, it is important … Lire la suite
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2012 — The Challenges and Opportunities of Using a Competency Based Education Model in Social Work EducationRésumé
The ongoing expansion of neo-liberal globalization is affecting the milieu of both social work education and its practice and, in some countries, is actively promoting the adoption of Competency Based Education (CBE) models for education. To date, research addressing the question of whether CBE provides a useful theoretical framework in designing and implementing a curriculum for a Bachelor of Social (BSW) Work program has been sporadic. Given the importance of the ‘CBE question’ for education in general, and social work education in particular, the nature and process of current CBE curriculum designs for social work programs needs to be well … Lire la suite
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2012 — Automatic Calibration of Optical Multitouch SurfacesRésumé
In this, thesis a novel system for automatically calibrating an optical multitouch surface is presented. The current state of multitouch software forces the user to manually calibrate a surface prior to usage. This process can be tedious and error prone, especially for large surfaces. Our system automates the process of calibration by combining small electronic devices, called Blinks, and a specialized calibration algorithm, called Dasypus, that uses the Blinks to create a camera-to-display transformation function. This thesis presents an overview of the current state of optical multitouch technologies, with special emphasis placed on calibration processes. Popular open-source software packages are … Lire la suite
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2012 — An Investigation of Professional Learning Communities as a Tool for Educational Change Within One Saskatchewan School DivisionRésumé
The purpose of this qualitative study was to investigate how one Saskatchewan school division used professional learning communities (PLCs) as a tool for change. The investigation involved in-depth interviews with seven participants to determine their perceptions, understanding and viewpoints of PLCs and their implementation within the school division. The participants included one superintendent, one consultant/teacher, one elementary in-school administrator, two secondary in-school administrators, one elementary teacher, and one secondary teacher. The participants were all veteran employees and had experienced the implementation of PLCs firsthand. The main PLC model used in this division was based on the work of DuFour (2004). … Lire la suite
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2012 — Female Sexuality And Intimate Partner ViolenceRésumé
Sexuality is a broad term that is used to include biological sex, sexual acts, sexual feelings, gender roles, and attitudes towards sexual behaviour (Jackson & Scott, 1996). It is a dynamic construct that can be influenced by many factors, including experiences of violence and abuse. Intimate partner violence (IPV) is one factor that can affect women in many ways, including their physical health, mental health, parenting, and sexuality (Burgess, 1983; Faravelli, Giugni, Salvatori, & Ricca, 2004). The focus of this qualitative study is to understand how IPV impacts women’s sexuality in a sample of women who have experienced IPV. A … Lire la suite
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2012 — Equilibrium and Mass Transfer Behaviour of CO2 Adsorption on Zeolites, Carbon Molecular Sieve, and Activated CarbonsRésumé
Natural gas is an important source of energy that usually requires purification steps to remove contaminants prior to pipeline transmission and industrial usage. By pressure swing adsorption process (PSA), carbon dioxide (CO2) can be separated from natural gas using solid materials commonly known as adsorbents. Adsorption capacity (or equilibrium) and adsorption kinetics of the adsorption materials have great impacts on the efficiency of CO2 removal in this PSA process. The objective of this study was to characterize the CO2 adsorption equilibrium and kinetics of commercial adsorbents that have potential for use in the PSA process and also to provide a … Lire la suite
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2012 — Procrustes: A Declarative Scene Modelling SystemRésumé
This thesis presents a floor planning and furniture layout system called Procrustes, that helps a user to place rooms and furniture in a virtual house. Scenes are generated by considering the user's partial scene description. The resulting floor plans and furniture arrangements can be used in video games to generate scenes that are not of prime importance to the games. We developed the Procrustes Declarative Scene Modelling (DSM) system to reduce the amount of user input compared to existing DSM systems. The name Procrustes is extracted from a Greek mythological character who placed people in an iron bed and ensured … Lire la suite
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2012 — An Investigation of a Theoretical Zigbee-Based Border Crossing SystemRésumé
Excessive delays at border crossings threaten the mobility of people and trading of goods. The management of transportation infrastructure generally requires continuous and real-time monitoring, formulation, and dissemination of information and guidance to motorists and other parties. This thesis proposes and studies a theoretical border crossing system utilizing ZigBee-based wireless networks. ZigBee (IEEE Standard 802.15.4) is a low data rate, low power, wireless communication protocol that enables the spontaneous formation of ad hoc wireless networks. In this system, trucks traversing border crossings are equipped with ZigBee-based systems, which can send different types of information including, for example, (bio-)chemical hazards and … Lire la suite
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2012 — Kinetics of Carbon Dioxide Absorption into Aqueous Solutions of4-(Diethylamino)-2-Butanol and Blended Monoethanolamine and 4-(Diethylamino)-2-ButanolRésumé
Recently, global warming and climate change problems have begun to receive attention globally. One of the urgent policies is to control greenhouse gas emissions to the atmosphere. Among the greenhouse gases, CO2 is considered to be a major contributor due to its abundance. The absorption of CO2 into chemical solvents is one of the mostpromising technologies for capturing CO2 due to its capability of handling large amounts of exhaust stream. One of the key parameters for this technology is to use effective solvents. A newly developed amino alcohol solvent, 4-(diethylamino)-2-butanol (DEAB), is now being considered as a promising alternative solvent … Lire la suite
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2012 — Molar Heat Capacities and Heats of Mixing of Aqueous Solutions of 2-(Propylamino)Ethanol, 2-(Butylamino)Ethanol, 1-(2Hydroxyethyl)Piperidine, BIS (2-Methoxyethyl)Amine and Other Alkanolamines of Importance to Carbon Dioxide CaptureRésumé
This study is concerned with the determination of the molar heat capacity, Cp, and molar heat of mixing ,HE, of aqueous 2-(Propylamino)ethanol (PAE), 2-(Butylamino)ethanol (BAE), 1-(2-Hydroxyethyl)piperidine (HEP), and Bis(2-methoxyethyl)amine (BMOEA) solutions, as well as the Cp of 2-(Ethylamino)ethanol (EAE) and HE of aqueous Diglycolamine (DGA) using a C80 heat flow calorimeter over a full range of mole fractions (x1). Cp measurements were performed in a temperature range of 303.15K to 353.15K, while HE measurements were performed at three temperatures (298.15, 313.15, and 333.15 K). Of the five alkanolamines studied, BMOEA and BAE exhibited the highest values of heat capacity, whereas … Lire la suite
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2012 — The Weaver and The Web: A Foucauldian Analysis of the Discourses Which Produce Women Abusing Women in the WorkplaceRésumé
Bullying of women by other women in the workplace has rarely been the focus of research. This dissertation uses feminist poststructural theory and Foucauldian discourse analysis to problematize the belief that workplace bullying is the result of individual personality flaws, skill deficits, or psychopathology in the abuser or in the target, and to trouble the individualization of a serious social problem which has resulted in victim blaming, and turning the focus of public attention away from the consequences of gender and race. This dissertation analyzes research texts based on transcriptions of open interviews with five women who have experienced abuse … Lire la suite
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2012 — Organ Donation and Transplantation: Considering International Policy Options for CanadaRésumé
Organ donation is the most cost-effective, if not the only, option for the treatment for end-stage organ failure. End-stage organ failure is an epidemic, costing the Canadian healthcare system over $35 billion dollars per year. As organ donation and transplantation (ODT) is the most cost-effective solution, it is in Canada’s best interest to maximize the number of donors to allow for the maximum number of transplants. Canada currently lags behind most developed countries and the literature describes most of the world being in an “organ shortage”, with demand for transplants far exceeding the supply of viable, donated organs. Current efforts … Lire la suite
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2012 — Discovering Group Differences from Qualitative and Quantitative Attributes Using Contrast Set Mining with Discretization and Measures of InterestingnessRésumé
Identifying differences between groups is a fundamental problem in many disciplines. Groups are defined by a selected property that distinguishes one group from the other. For example, gender (male and female students) or year of admission (students admitted from 2001 to 2010). The group differences sought are novel, indicating that they are not obvious or intuitive, potentially useful, suggesting that they can aid in decision-making, and understandable, implying that they are presented in a format easily understood by human beings. Contrast set mining has been developed as a data mining task which aims to efficiently identify differences between groups from … Lire la suite
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2012 — A Rough Set Analysis of Facial Similarity JudgementsRésumé
Facial recognition is routine for most people; yet the process of facial recognition or describing a face to be recognized, reveals a great deal of complexity inherent in the activity. Eyewitness identification remains an important element in judicial proceedings: it is very convincing, but it is not very accurate. A study was conducted in which participants were asked to sort a collection of facial photographs into an unrestricted number of piles, based on their individual judgements of facial similarity. Participants then labelled each pile. Stimuli photos were equally divided between two racial groups. These judgements were analyzed to determine if … Lire la suite
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2012 — Environmentally-Friendly Corrosion Inhibitors for the Amine-Based CO2 Absorption ProcessRésumé
Corrosion in an amine-based carbon dioxide (CO2) absorption process is one of the most serious operational problems affecting both plant safety and economics. Corrosion inhibitors are widely applied for corrosion control, mainly due to their adaptability. However, the most effective corrosion inhibitors are generally toxic or heavy metal based, which makes their handling and disposal difficult and expensive. Owing to increasing environmental regulations, the search for an environmentallyfriendly corrosion inhibitor is more relevant now than ever before. In this work, a pool of environmentally-friendly corrosion inhibitors for the CO2 absorption process was identified based on the principles of hard and … Lire la suite
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2012 — Responses of Fish and Zooplankton to Climate Variation on the Prairies, and Their Sensitivity to Climate ChangeRésumé
Climate change is anticipated to significantly increase temperatures and alter current rainfall patterns, which will have important ramifications for aquatic habitats and their biological communities. Current observations indicate that climate effects will vary depending on region and lake type, and some lacustrine areas, such as the Great Plains, are particularly sensitive to these effects. Variations in local climate and lake morphometry create different habitats, which each have unique environmental controls. The anticipated impacts of climate change on aquatic biota can be difficult to evaluate because of potentially contrasting effects of temperature and hydrology on lake ecosystems, particularly in closed-basin lakes … Lire la suite
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2012 — Efforts to Reduce Infant and Maternal Mortality in Saskatchewan During the Settlement PeriodRésumé
This thesis examines how the problem of infant and maternal mortality was addressed in early twentieth century Saskatchewan. During the settlement process, the government had given little thought to the needs of women and childbirth, in particular, access to medical care to ensure for safe childbirth. As a result, the infant and maternal mortality rates were alarmingly high in Saskatchewan during this period. Women‟s organizations, the medical profession and the provincial government all tried to address the maternity needs of prairie women to varying degrees and with limited results. Several historical developments occurring at the same time affected the type … Lire la suite
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2012 — Development of Characterization and Optimization Methodologies for Waste ManagementRésumé
Applications of mathematical models to waste management are usually complicated by the complexities involved in either waste treatment processes or waste management systems. In this dissertation research, a set of characterization and optimization methodologies have been developed and applied to waste management. In detail, they include: (a) a stepwise-cluster microbial biomass inference (SMI) model through introducing stepwise cluster analysis (SCA) into composting process modeling for tackling the nonlinear relationships between state variables and microbial activities; (b) a genetic algorithm (GA) aided stepwise cluster analysis (GASCA) method for describing the nonlinear relationships between the selected state variables and the C/N ratio … Lire la suite
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2012 — Large Area MultiPixel Photon Counters on the Search for Exotic Hybrid Mesons at GlueXRésumé
The GlueX project aims to elucidate the confinement property of quantum chromodynamics. Silicon PhotoMultipliers (SiPMs) will be the readout for the GlueX Barrel Calorimeter (BCAL), a key subsystem of the detector designed for the GlueX project. The important and most desired characteristic of SiPMs is their immunity to magnetic fields, since the BCAL is placed immediately in a 2:2 T solenoid. Other advantages compared to conventional PMTs is that they operate using low bias voltage (< 100 V ), have higher photon detection efficiency, lower cost, and are more compact and robust. SiPMs offer much promise to revolutionize light detection … Lire la suite
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2012 — Nurses and Their Work in Hospitals: Ruled by Embedded Ideologies and Moving DiscoursesRésumé
Nursing originates from societal beliefs about women‟s roles of self-sacrifice and obedience situated within a history of patriarchal control. Unfortunately, these ideologies continue to influence and shape nurses‟ work in hospitals. Within the literature, several dominant discourses construct hospitals and nurses‟ work in hospitals as chaotic and challenging while nurses are conceptualized as stressed and fatigued. Overcrowding, increasing patient acuity, budget constraint, and chronic understaffing are only some of the issues nurses face in their every day and night work. Because of these problems, nurses are expected to care for patients in the hallways; manage with minimal staffing; and simply … Lire la suite
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2012 — Novel genes required for proper cell envelope function in the plant symbiont Rhizobium leguminosarumRésumé
The cell envelope of Gram-negative bacteria is a complex structure that is critical for facilitating interactions between bacteria and their environment. The objective of this research was to identify and characterize novel genes required for proper cell envelope development in the legume symbiont Rhizobium leguminosarum. In R. leguminosarum there is a positive correlation between mutations that affect cell envelope structure and sensitivity to peptide-rich media; therefore, I implemented an innovative transposon mutagenesis approach to identify novel genes connected to the cell envelope by screening for mutants unable to grow on peptide-rich media, but unaffected in growth on minimal media. Of … Lire la suite
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2012 — Investigation and Reconstructions of the Hydroclimatic Variability of the Souris River BasinRésumé
growing dependence on surface water resources in the Prairie Provinces has resulted in an increasing vulnerability to hydrological drought. A serious risk from recent and projected climate warming in the Canadian Prairies is a shift in the amount and timing of streamflow. The Souris River Basin has, over the years, been plagued with problems associated with either inadequate water supplies and flooding, both of which affect the social and economic well being of the residents of the Souris River Basin. Managing for the greater range of hydrologic variability evident in proxy records versus gauged, hydrometric records can prepare water managers … Lire la suite
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2012 — The « un-frenching » of French-Canadians: Histoires des Fransaskoises en situation linguistique minoritaireRésumé
Cette étude aborde le phénomène de la perte de la langue première chez cinq Fransaskoises. En examinant leur situation linguistique minoritaire ainsi que leurs expériences particulières dans les domaines communautaire, scolaire et enfin familial tout au long de leur vie, j’ai pu identifier certains éléments, selon les perceptions de mes participantes, qui ont contribué à cette perte de la langue française. L’étude suggère que deux aspects, les relations de pouvoir inéquitables entre les langues (Bourdieu, 1977, 1980, 1986) existant au sein de la société ainsi que le rôle de la femme (Heller & Lévy, 1994; Lambert & Taylor, 1996; Norton, … Lire la suite
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2012 — The diabetic patient software agent.Résumé
The purpose of this thesis is to develop an agent-based simulation model of a diabetic patient‟s blood glucose levels in which the efficiency of various treatment strategies can be evaluated in a micro scope. A further aim is to establish a multi-agent system of evaluating the healthcare system response under various scenarios of healthcare policies in a macro scope. A framework is endeavoured to be constructed in order to extend its applications into other diseases. The incidence of Type 2 diabetes mellitus is reaching epidemic proportions in the world in recent times. On one hand, the disease can result in … Lire la suite
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2012 — Studies and Prevention of Carbon Steel Corrosion and Solvent Degradation During Amine-Based CO2 Capture from Industrial Gas StreamsRésumé
This research is focused on simultaneous inhibition of carbon steel (1020) corrosion and oxidative monoethanolamine (MEA) degradation in a carbon dioxide (CO2) capture process from simulated post-combustion coal-fired flue gas, where components typically present in the flue gas partly contribute to such problems. Therefore, in this work, various additives were selected to study in the effects of flue gas composition on both carbon steel (1020) corrosion and oxidative MEA degradation. Sodium chloride (NaCl), ferrous chloride (FeCl2), and hydrochloric acid (HCl) were selected to represent different sources of chlorides in the flue gas. Sulphurous acid (H2SO3), sulphuric acid (H2SO4), and nitric … Lire la suite
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2012 — Shift and Quasi-Shift Endomorphisms Associated with Representations of Cuntz AlgebrasRésumé
We present an overview of the main literature regarding *-endomorphisms of the von Neumann algebra B(H), the bounded linear operators on a separable, in nite- dimensional Hilbert space H. In doing so, we follow the established technique of ex- ploiting the surjective correspondence with non-degenerate representations of Toeplitz- Cuntz algebras. Moreover, we introduce an unstudied class of endomorphism, which we call quasi-shift endomorphisms, and show that they are determined by the well- known class of shift endomorphisms. This is original research adapted from our recent pre-print Quasi-shift Endomorphisms Associated with Representations of Cuntz Alge- bras [13]. i Lire la suite
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2012 — "Better to Reign in Hell, than Serve in Heaven": Satan's Transition From a Heavenly Council member to the Ruler of PandaemoniumRésumé
In this thesis, I argue that Satan was not perceived as a universal malevolent deity, the embodiment of evil, or the “ruler of Pandaemonium” within first century Christian literature or even within second and third century Christian discourses as some scholars have insisted. Instead, for early “Christian” authors, Satan represented a pejorative term used to describe terrestrial, tangible, and concrete social realities, perceived of as adversaries. To reach this conclusion, I explore the narrative character of Satan selectively within the Hebrew Bible, intertestamental literature, Mark, Matthew, Luke, Q, the Book of Revelation, the Nag Hammadi texts, and the Ante-Nicene fathers. … Lire la suite
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2012 — A Comparison of Aggregate and Multi-Region Load Forecasting Models in SaskatchewanRésumé
Power systems in large geographic environments experience diverse weather phenomena. Due to spatial separation and economic diversification, load centres will exhibit differing electrical demand. This diversity of weather and electric loads proves challenging for load forecasters using a single aggregate model. In such systems, aggregate response of these load centres cannot be properly analyzed by a single load-weather model. Instead, the aggregate demand is best explained through multi-region modeling. This thesis describes the load and weather diversity within the control area of an electric utility in the province of Saskatchewan. A Similar Day model is contrasted against Artificial Neural Network … Lire la suite
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2012 — Mature Women Students and Their University ExperienceRésumé
This research study included 12 women - six who were in the process of obtaining their degree and six who had obtained their degree, for at least 10 years, from the same mid-sized Canadian university. All of the women were at least 30 years of age at the commencement of their program. This research study utilized qualitative interviews and examined the lived experiences of these 12 mature women for their experiences, barriers, and supports they encountered while obtaining their first undergraduate degree. The epistemological perspective, theoretical perspective, and methodology utilized were constructivism, feminism, and Charmaz’s constructivist grounded theory, respectively. The … Lire la suite
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2012 — Study on Wormhole Coverage, Foamy Oil Phenomenon, and Well Interference of Cold Heavy Oil Production with Sand WellsRésumé
In Cold Heavy Oil Production with Sand (CHOPS) wells, the presence of wormholes is considered to be one of the most important factors that contribute to enhanced production rate. Quantitative detection of wormholes can offer important parameters in further optimization of post-CHOPS processes such as post-CHOPS EOR planning and infill well drilling. Moreover, foamy oil is one of the most complex phenomena in CHOPS wells because gas starts mixing with oil and forming relatively continuous foam with high compressibility once the pressure drops to a certain point during depletion. A CHOPS reservoir with two zones including a foamy oil zone … Lire la suite
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2012 — Automatic History Match and Upscaling Study of Vapex Process and Its Uncertainty AnalysisRésumé
Vapour Extraction (VAPEX) is a process to recover heavy oil by injecting vapourized solvent into a reservoir. In order to ensure successful commercial application of a VAPEX process, reliable prediction of VAPEX performance is crucial. The current practice for VAPEX performance prediction is using analytical scale-up methods that translate laboratory results to field applications with analytical models. However, the drawbacks associated with the analytical scale-up methods are that they only consider single phase flow and gravity drainage and cannot take reservoir heterogeneity into account, which limits the applicability to real field cases. In this work, an effort was made to … Lire la suite
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2012 — Dual-Interval Optimization Modeling for the Planning of Natural Gas Pipeline SystemsRésumé
Natural gas (NG) pipeline network, a major mode of transportation, requires optimized operations and management in order to ensure stable and efficient gas supplies. To provide such optimal solutions, pipeline systems modeling is a widely used method. The interactions among upstream, midstream, and downstream sectors could be clearly defined and addressed by developing mathematical models for pipeline systems. However, in the real world, the market demand of NG usually cannot be deterministic values, and floating demand is the more common situation. Furthermore, the range of floating demand also cannot be determined. Therefore, it involves dual-interval uncertainties. Currently, in the field … Lire la suite
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2012 — Motion and Mobilization of Oil Slugs in a Capillary Model Under Stationary ConditionsRésumé
In this research, both experimental and numerical investigations are conducted to study the mechanism behind slug flow in a capillary tube. A 1.2 mm inner diameter capillary model is employed to represent the pore structure of porous media. A single oil slug is trapped in the tube and mobilized from a stationary condition by water injection. During the flow process, the flow behavior, the maximum driven pressure to mobilize the oil slug and the flow time to reach the maximum pressure are recorded and analyzed. The results show that the generation of a thin water film between the oil slug … Lire la suite
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2012 — Utilization of co2 for pressure maintenance and improving oil recovery in heavy oil reservoirs.Résumé
Tremendous resources of heavy oil are located in Western Canada, i.e., Alberta and Saskatchewan, most of which are contained in thin payzones. Thermal-based techniques have conventionally been utilized to enhance heavy oil recovery. However, characteristics of these thin reservoirs result in excessive heat losses to adjacent formations, leading to thermal-based techniques ineffective and uneconomical in such heavy oil formation. Although pressure maintenance via gas injection has been applied in light and medium oil reservoirs, few attempts have been made to evaluate performance of CO2 injection for such purpose in a heavy oil reservoir. It is of practical and fundamental importance … Lire la suite
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2012 — A Cost-Sensitive Approach to Ternary ClassificationRésumé
Bayesian inference and rough set theory provide two approaches to data analysis. There are close connections between the two theories as they both use probabilities to express uncertainties and knowledge about data. Several proposals have been made to apply Bayesian approaches to rough sets. This thesis draws results from two probabilistic rough set models, namely, decision-theoretic rough set models (DTRSM) and confirmation-theoretic rough set models (CTRSM) to propose a new Bayesian rough set model (BRSM) for cost-sensitive ternary classification. I argue that although the two classes of models share many similarities in terms of making use of Bayes’ theorem and … Lire la suite
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2012 — Single Camera Photogrammetry Using Novel Calibration TechniquesRésumé
In this thesis, single camera photogrammetry using novel calibration techniques is introduced for the purpose of 3D measurement. A measurement technique using a perspective pinhole camera and a paper-based calibration board is introduced first. Then, we present two algorithms, the triangulation algorithm and epipolar geometry algorithm, to conduct the 3D measurement. The proposed algorithms use a laser projector to replace the paper based calibration board and the 3D coordinates of the laser points in the scene are extracted by using these two algorithms. The 3D coordinates are further processed to measure the dimensions and the orientation of a rectangular box … Lire la suite
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2012 — Transient Temperature Analysis of SAGD ProcessesRésumé
Steam-Assisted Gravity Drainage (SAGD) is the leading recovering technique for heavy oil and bitumen in Canada. An indispensable condition for a successful SAGD process is the full utilization of the injected steam. However, because of the reservoir heterogeneity and the wellbore hydraulics and undulation, a non-uniform steam chamber will evolve. This study proposes Transient Temperature Analysis (TTA) to evaluate the earlystage SAGD (start-up and ramp-up) steam conformance through analyzing the temperature falloff data after shut-in. Both forward and inverse mathematical models are presented to facilitate the application of this technique. The four 2D forward mathematic models, including three non-condensation models … Lire la suite