title: Studies on Cyclobutadiene-Metal Complexes

contributor:
Maitlis, P.M.
Chemistry

subject: halides, cyclobutadiene-metal, complexes, reaction, basic

abstract:
 Reaction of tetraphenylcyclobutadienepalladium halides, [(Ph4C4)PdX2]2, with [(C5H5)M(CO)3]2 (M=Mo or W) gave complexes of the type (Ph4C4)(C5H5)M(CO)X (M=Mo, X=Cl, Br or M=W, X=Br). Conversely, reaction of [(R4C4)PdBr2]2 (R=C6H5, p-CH3C6H4) with [(C5H5)Fe(CO)2]2 or (C5H5)Fe(Co)2Br led not to the expected transfer of the cyclobutadiene ring group onto iron, but to complexes of the type [(R4C4)M(C5H5)]+ FeBr4- (M=Pd or Ni). These were converted into the diamagnetic bromides. [(R4C4)M(C5H5)]+ Br- which, on treatment with sodium methoxide, gave the cyclobutenyl complexes (R4C4OMe)M(C5H5) of palladium and nickel.

 The complexes (R4C4)Co(Co)2X (R=C6H5, p-CH3C6H4, X=halogen) have been prepared by ligand-transfer reactions from [(R4C4)PdX2]2. The reactions of (R4C4)Co(CO)2X show considerable similarity to those of (C5H5)Fe(CO)2X, and evidence for a very strong metal-ring bond in the cobalt complex is
presented. Reaction of (R4C4)Co(CO)2Br with C6F5Li gave the very stable
(R4C4Co(CO)2C6F5. With aromatic hydrocarbons in the presence of AlCl3, (R4C4)Co(CO)2Br gave the stable [(R4C4)Co(π-Arene)]+; cycloheptatriene also reacted with (R4C4)Co(CO)2Br in the absence or a catalyst to give [(R4C4)Co(C7H8)]+. Nucleophilic attack occurred readily at the C7H8 ring in [(R4C4)Co(C7H8)]+ and less readily at the benzene ring in [(R4C4)Co(C6H6)]+ to give (R4C4)Co(cycloheptadienyl) and the (R4C4)Co(cyclohexadienyl)
complexes, respectively.

 The order of susceptibility of π-complexed ligands in metal d^8 complexes towards nucleophilic attack, cycloheptatriene> benzene> (R4C4)> cyclopentadienyl, is proposed. A novel method for effecting hydride abstraction is reported. Aniline in [(Ph4C4)Co(π-Aniline)]+ is less basic than aniline itself by approximately 1.5 pK units.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: Talus, Solifluction And Raised Marine Deposits At Cape Ricketts, S.W. Devon Island, N.W.T.

contributor:
McCann, S.B.
Geography

subject: size, shape, characteristics of surface, surface mantle materials, Arctic environment, Solifluction zones, active beach zones

abstract:
No Abstract
Thesis
Bachelor of Arts (BA)


title: Streamflow Responses To Rainfall Events In Wetland, Urban And Agricultural Environments

contributor:
Woo, M.K.
Geography

subject: land use, stream discharges, hydrographs, watersheds, urban, agriculutral, wetland environments, peak discharge

abstract:
 Through the use of unit hydrographs this paper demonstrates the effect of land uses on the stream discharge of three watersheds located in Southern Ontario. The watersheds represent urban, agricultural and wetland environments. The three different environments each demonstrate different responses to a unit magnitude of uniformly distributed precipitation.

 The rainfall events occurred during September and October 1981 and 1986. Three durations of events, six, twelve and twenty-four hours, are studied.

 The paper demonstrates that an urban watershed experiences a greater magnitude of peak discharge and faster response time than either of the other two studied watersheds. The unit hydrograph resulting from a wetland showed that the wetland watershed was an important regulator of streamflow.

 Special emphasis were placed on the urbanization of agricultural lands as this is the most applicable land use change currently occurring in Southern Ontario.The results from this study will be useful when assessing the magnitude of the potential runoff problem when these agricultural watersheds are urbanized.

abstract: Thesis

abstract: Bachelor of Arts (BA)


title: The Band Structure of MnF2

contributor:
Stager, C.V.
Physics

subject: augmented, plane wave, band structure, MnF2, energy, electron, states

abstract:
 The Augmented Plane Wave method has been used to calculate the one-electron energy band structure of MnF2 . The bands were computed at the r point and along the ^
line for cases representing the "paramagnetic" and anti-ferromagnetic states of MnF2.

abstract: Thesis

abstract: Master of Science (MSc)


title: A Study of the Hyperfine Structure of Samarium-153 and Samarium-155

contributor:
Summers-Gill, R.G.
Physics

subject: hyperfine, structure, isotopes, samarium, nuclear, magnetic, deformation, decay

abstract:
It was the purpose of this investigation to study the hyperfine structure of the β-unstable isotopes of samarium using the atomic beam magnetic resonance technique. A brief review is given of the nuclear and atomic theory necessary for the interpretation of the experiments. The hyperfine interaction constants (Mc/sec) for Sm153, and
the nuclear moments inferred from them, are summarized below:
A1 = - 2.100(5)          B1 = 289.042(4)
A2 = - 2.573(6)          B2 = 306.521(21)          C2 = - 0.0003(9)
A3 = - 3.115(4)          B3 = 165.824(20)          C3 = - 0.0087(12)
μI =  - 0.021(1) n.m.    Q = 1.1(3) barns
From the quadrupole moment it follows that the nuclear deformation δ = 0.25(5). The magnetic moment disagrees with the predictions of the Nilsson model for either spin 3/2 state with which the Sm153 ground state might be associated. Also determined was the spin of Sm155. The result, I = 3/2, confirms the assignment from the less direct evidence available from radioactive decay studies. The more extensive measurements necessary
to determine the moments were not attempted.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: The Origin Of The Lion's Head Peninsula Beach

contributor:
Ford, D. C.
Geography

subject: morphology, rock, eroison, shales, dolomite, escarpment, dolomite cobble beach, lacustrine sand deposits, glacial erratics

abstract:
 The beach deposits at the head of the Lion's Head Peninsula are described and categorized according to the type, size and morphology of the rocks making up the deposit and their origins. This categorization emerges as a pattern of four zones along the l ength of the beach.

 The points at each end of the beach, which used to be in a much more defined bay, have been glacially eroded by re-entrants and undercut by postglacial lakes. Shales and dolomite from the escarpment make up this zone's deposits.

 Zone two is a dolomite cobble beach supplied by the escarpment's erosion from a blockaded late-glacial ice margin and the undercutting of postglacial lakes.

 Zone three is a mixture of the dolomite from the escarpment, lacustrine sand deposits, and glacial erratics.

 Zone four is made up of a distinct band of erratics deposited by the ice of the Georgian Bay lobe of the Late Wisconsin Glaciation. The Lion's Head promontory stood resistant to the flow of ice and caused it to deposit these large erratics which are still visible today.

abstract: Thesis

abstract: Bachelor of Arts (BA)


title: Universal Topological and Uniform Alegbra

contributor:
Banaschewski, Bernhard
Mathematics

subject: universal, topological, uniform, alegbra, uniform Peano alegbras

abstract: This paper surveys. the fundamental theory of universal topological and uniform algebras and relates the former to topological partial algebras. In particular, the theory of topological and uniform Peano algebras is described and some other universal mapping questions analysed and solved. In addition a theory of compact extensions is developed for topological algebras.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: The Effect of Chromium on the Activity Coefficient of Sulphur in Liquid Fe-S-Cr Alloys

contributor:
Kay, D.A.R.
Metallurgy

subject: chromium, coefficient, sulphur, Fe-S-Cr, alloys, liquid, energy

abstract: The effect of chromium on the activity coefficient of sulphur in the ternary system Fe-S-Cr has been investigated over an extended range of temperature and chromium concentrations. A levitation-melting technique was used and H2-H2S gas mixtures were passed over levitated droplets of iron and iron-chromium alloys. By comparing the experimental results obtained for both binary and ternary systems the effect of chromium on the activity coefficient of sulphur was derived in terms of first order free energy, enthalpy and entropy coefficients. Thermal diffusion effects were cancelled out by carrying out binary and ternary runs under the same experimental conditions.

abstract: Thesis

abstract: Master of Science (MSc)


title: Urban Growth In Haldimand County

subject: Water Transportation, Road Transportation, Rail Transportation, Haldimand County, Dunnville, Caledonia, Cayuga, Indianna, Jarvis, Hagersville, York, Population, settlements, urban concentrations

abstract:
No Abstract Provided
Thesis
Bachelor of Arts (BA)


title: Controlled polymerization for drug delivery to the eye

contributor:
Sheardown, Heather
Biomedical Engineering

subject: RAFT polymerization; Temperature responsive; Posterior segment; Diabetic Retinopathy; Hydrogel; Nanoparticles; Block copolymer; Micelle; Mucoadhesive; Drug delivery/release

abstract:
ABSTRACT

	Effective drug delivery to ocular tissues is an unmet challenge that has significant potential to improve the treatment of ocular diseases. Whether the intended drug delivery target is the anterior or posterior segment, the eye’s efficient natural protection mechanisms prevent effective and sustained drug delivery. Anatomical and physiological barriers including the rapid tear turnover that effectively washes away topically applied drugs, the impermeable characteristics of the cornea, conjunctiva, and sclera, and the tight junctions in the blood-ocular barriers make conventional drug delivery methods ineffective. New materials that are able to overcome these barriers are essential to improving the sustained delivery of ophthalmic therapeutics to the intended targets within the eye. This thesis will explore two polymeric drug delivery systems that have the potential to improve therapeutic delivery to ocular tissues. Chapter 1 will discuss the anatomical and physiological barriers to ophthalmic drug delivery and overview current research in this area. Chapter 2 will discuss the synthesis of N-isopropylacrylamide-based copolymers with adjustable gelation temperatures based on composition and molecular weight. Chapter 3 will discuss further development of these copolymers into an injectable, thermoresponsive, and resorbable polymeric drug delivery system intended for the treatment of diseases in the posterior segment. Chapter 4 will discuss the development of mucoadhesive polymeric micelle nanoparticles based on phenylboronic acid intended for topical administration of ophthalmic therapeutics. Finally, Chapter 5 will provide an overview of potential future work on these materials that could further develop and broaden their therapeutic use.

abstract: Thesis

abstract: Master of Science in Biomedical Engineering


title: Home Street Home Homelessness - A Case Study of Hamilton

contributor:
Eyles, J.
Geography

subject: homeless, proverty, streets, survival, Hamilton, homelessness in Hamilton, Factors affecting Homeless, housing, cost, housing cost, cost of living, rental cost, elderly homeless, youth homeless, affordable housing, income, de-institutionalization, NIMBY

abstract: Existing in our society today are a number of people that live in the streets and use emergency shelter services for the basic needs of survival. This research report attempts to define the scale and nature of homelessness using Hamilton as a case study. It is a descriptive analysis that provides a synopsis of homelessness in Hamilton and provides recommendations based on individuals that directly work with the homeless. This research invovles a first hand perspective experience with working with the homeless. Therefore, it incorporates the human element involved in homelessness.

abstract: Thesis

abstract: Bachelor of Arts (BA)


title: Fibred Categories and the Theory of Structures - (Part I)

contributor:
Bruns, G.
Mathematics

subject: fibred categories, structures, intrinsic, functors

abstract:
 This THESIS comprises the core of Chapter I and a self-contained excerpt from Chapter II of the author's work "Fibred Categories and the Theory of Structures". As such, it contains a recasting of "categorical algebra" on the (BOURBAKI) set-theoretic frame of GROTHENDIECK-SONNERuniverses, making use of the GROTHENDIECK structural definition of category from the beginning. The principle novelties of the presentation result from the exploitation of an intrinsic construction of the arrow category C^2 of a VL -category C. This construction gives rise to the adjunction of a (canonical) (VL-CAT)-category structure
to the couple (C^2, C), for which the consequent category structure supplied the couple (CAT(T,C^2), CAT(T, C)) for each category T, is simply that of natural transformations of functors (which as such are nothing more than functors into the arrow category).

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: The Reliability Of An Energy Balance Model In Simulating Climatic Responses Due To Increases In Carbon Dioxide Levels

contributor:
Davies, J. A.
Geography

subject: climatic model, energy balance, climatic simulations, IBM-PC personal computer,  climatic responses, Climate, CO, CO2,  carbon dioxide, temperature, cloud,

abstract:
 A relatively simple climatic model based on the energy balance has been used to examine the climatic responses due to increases in carbon dioxide CO2. Simulations concerning the CO2 concentration, the cloud fraction and the ocean's mixed-layer depth were all performed using an IBM-PC personal computer. The results were intended to provide a better understanding of the processes involved in an EBM, as well as the importance of this type of model in simulating climatic responses. There were four main areas of study within the research centred around both a
decrease and an increase in CO2 concentration, changes in the cloud fraction and the influence of the ocean's mixed-layer.

 The role of the oceans in the climate system is still somewhat of a mystery to most scientists. in terms of its affect on a CO2 enhanced climate. Changes in the cloud fraction serve either to enhance or suppress the effect of CO2 on the surface temperature of the planet. This is dependant on whether the amount of cloud is reduced or increased. The focus of the study is based on the changes in carbon dioxide concentration levels. Simulations confirm, that when CO2 is reduced. the surface temperature will decrease as well. When CO is halved. the temperature decrease is 2.51 ° C. In contrast, when CO2 is doubled the surface temperature rose by 2.91 °C . Thus. causing the present clay climate of the model to warm drastically.

 The reliability of the results proved to be difficult to assess. The model tends to overestimate decreases in temperature when co~ is reduced in content. However. Burt's model does seem to accurately represent increases in temperature for 2x CO2 .The simulation results fall within a range defined by the results of selected radiative convective models (RCM). Nevertheless. there is a need for increased research in the area of effects. produced by other parameters on a CO2 enhanced climate.

abstract: Thesis

abstract: Bachelor of Arts (BA)


title: Injectivity in Congruence Distributive Equational Classes

subject: injectivity, equational classes, congruence, distributive, lattices

abstract:
 In this thesis, we study the concept of injectivity in equational classes of (universal) algebras and in particular we are concerned with congruence distributive equational classes that have enough injectives. We show that every reasonable equationally complete congruence distributive equational class has enough injectives and we describe them completely.
We then examine what equational subclasses of Lattices, Heyting algebras, and pseudo-complemented lattices have enough injectives.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: Bubble Nucleation in Saturated and Subcooled Boiling

contributor:
Judd, Ross L.
Mechanical Engineering

subject: water boiling, bubble, nucleation, subcooling, heat flux, pressure

abstract: An experimental investigation is reported for water boiling at atmospheric pressure on a copper surface. Bubble nucleation at an artificial site was observed for five heat fluxes between 11,000 and 20,000 BTU/Hr Ft^2, and subcooling from 0° to about 30°F. Using Wiebe's correlation for heat flux and superheat layer thickness, four mathematical models were tested. The measured results are found to provide excellent agreement with the Han and Griffith model for bubble nucleation.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: On Modular Equational Classes

subject: equational, class, modular

abstract: This thesis determines necessary and sufficient conditions for an equational class to be modular and finds a modular property that is equivalent to permutability.

abstract: Thesis

abstract: Master of Science (MSc)


title: RESUSCITATIVE FLUIDS IN SEPSIS AND SEPTIC SHOCK: A SYSTEMATIC REVIEW, NETWORK META-ANALYSIS AND PILOT STUDY PROTOCOL

contributor:
Brozek, Jan
Guyatt, Gordon
Jaeschke, Roman
Health Research Methodology

subject: sepsis, network meta-analysis, fluids

abstract:
This thesis consists of two related studies presented as three separate manuscripts (all three have been published in peer-reviewed journals) and a study protocol that has been submitted for peer-reviewed funding. The over-arching theme of this thesis was to better characterize the efficacy of different intravenous fluids used for the resuscitation of intensive care unit (ICU) patients with severe sepsis or septic shock.

We performed an extensive search including multiple databases which found 20 randomized controlled trials (RCTs) that examined the effects of different intravenous fluids used in septic patients and met our a priori inclusion and exclusion criteria. In the first manuscript, we described in detail the composition of the 19 unique fluid products that were used in the various studies. This description included the fluid type, trade name, osmolality, tonicity, electrolyte content, molecular composition, pH, and manufacturer. We reviewed manufacturer’s websites, product monographs, and emailed industry representatives or study authors for more information regarding the fluids as required. The results of this study and systematic review led us to the second and third manuscripts which reported on a Bayesian network meta-analysis (NMA) of all fluid type comparisons.

Despite multiple well-done RCTs, comparative data regarding the clinical effect of different resuscitative fluids when used for sepsis was incomplete. Most RCTs used 0.9% saline (normal saline) as control fluid and very few studies compared colloids directly. The advantage of using an NMA model in this setting was the ability to include indirect data into the overall point estimates. Data was abstracted from the 14 studies which focused on adult ICU patients and analyzed examining the outcomes of mortality (manuscript #2) and the use of renal replacement therapy (RRT) (manuscript #3). Certainty of evidence was evaluated for both outcomes using the GRADE approach.

Results of the analysis clearly document the harm of starch-based fluids when used in septic patients. Albumin containing fluids and crystalloids (such as normal saline and Ringer’s Lactate) are better options. Lower chloride solutions, such as Ringer’s Lactate, showed a signal towards decreased mortality and a decreased use of renal replacement therapy when compared to higher chloride fluids, such as normal saline, however this was based on indirect data, not statistically significant, and warrants direct comparison trials.

The final component of this thesis is a pilot study protocol for a study assessing the feasibility of a larger RCT examining the effect of low chloride versus high chloride fluids for resuscitation in patients with sepsis and septic shock. This protocol has been submitted as part of a peer-reviewed grant with the hopes of addressing this clinically important and timely question.

abstract: Thesis

abstract: Master of Science (MSc)

abstract: This thesis examines the ideal intravenous fluid to be given to patients with severe infection causing low blood pressure. A review of the current literature is presented with a protocol for future work.


title: An Oxygen Model for Lake Ontario

contributor:
Snodgrass, W.J.
Chemical Engineering

subject: oxygen model, lakes, hydraulic inflow, outflow, decomposition, temperatures

abstract:
 A dissolved oxygen model for stratified lakes is developed and is verified for Lake Ontario. The processes affecting the dissolved oxygen budget of a lake including
hydraulic inflow and outflow, production and decomposition, atmospheric reaeration, vertical transport across the thermocline, and sediment oxygen demand are analyzed and quantified. The production and decomposition oxygen fluxes are provided by a phosphorus model developed by others. These phosphorus-oxygen inter-relationships are quantified using stoichiometry developed for oceans. Nine years of temperature data for Lake Ontario are used to estimate the annual variations of epilimnetic temperatures, the rate of deepening of the epilimnion (i.e. thermocline depth vs time) and the vertical exchange coefficient. Dissolved oxygen data over a similar period are used to estimate lake-wide concentrations of DO. The vertical exchange and decomposition hypolimnetic oxygen fluxes are estimated from observed data. Model predictions of concentrations and fluxes compare favourably to the observed data. This provides some verification for the predictions of the oxygen model, the oxygen-phosphorus stoichiometry and the decomposition flux predicted by the phosphorus model.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: The International Classification of Functioning, Disability and Health (ICF) Framework: The impact of a brief educational intervention to Chiropractic Interns

contributor:
Rosenbaum, Peter
Rehabilitation Science

subject: ICF Chiropractic

abstract:
Introduction: The World Health Organization (WHO) encourages the use of its International Classification of Functioning, Health and Disability (ICF) framework as a biopsychosocial approach for healthcare professions to understand health and disability. The ICF framework is not currently a component of the curriculum at Canadian Memorial Chiropractic College (CMCC); however its concepts adhere to the college’s program ideals and fit well into a chiropractic model of care.
Purpose: To examine whether a brief educational presentation introducing the ICF to chiropractic interns could result in a detectable change in the interns' clinical thought processes, thus stimulating the incorporation of a wider variety of ICF concepts into the interns’ report-writing including notes on progress and goal setting.
Methods: This study reviewed the clinical report writing style and content of chiropractic clinical interns practicing at one of two Aptus Treatment Centres in Toronto, Ontario. Reports were analyzed prior to and following an educational intervention in which the ICF was introduced to the chiropractic clinical interns with suggestions for applications into practice. Following the intervention a subset of the chiropractic interns was specifically encouraged to incorporate ICF concepts into their report writing. Three participant groups were formed: Group 1 participants attended the presentation and received post-presentation encouragement, Group 2 participants attended the presentations but did not receive direct encouragement to incorporate ICF concepts into their report writing, Group 3 participants were current clinical interns who did not attend the presentations and consented to the evaluation of their clinical reports. After being anonymized to the researchers the pre- and post-intervention reports were reviewed using a standardized evaluation scheme that categorized the use of ICF concepts.
Results: This proof of concept study provided evidence that with a brief introduction to the ICF, chiropractic interns were able to incorporate a greater variety of ICF constructs into their report writing. Detectable changes were noted with Groups 1 and 2. Group 1 demonstrated a decrease in use of references to body function and structure and a marked increase in references to both personal and environmental factors. Group 2 demonstrated a decrease in use of references to body function and structure as well as a notable increase in references to both participation and environmental factors. No detectable changes were noted in the report writing of Group 3 participants who were not exposed to the ICF teaching.
Conclusions: The results of this study indicate that with even short educational presentations chiropractic interns are able to adopt a well-established framework of healthcare concepts into their patient treatment plans as noted in their report writing. This was apparent in both participant groups who attended the presentations and was not dependent on direct encouragement. This knowledge may influence the chiropractic interns’ understanding of health and disability and their interprofessional communication, and affect patient outcomes. These questions should be explored in future prospective controlled studies.

abstract: Thesis

abstract: Master of Science Rehabilitation Science (MSc)


title: The Crystal Dynamics of Platinum

contributor:
Brockhouse, B. N.
Physics

subject: platinum, crystal, neutrons, force, linear, Kohn

abstract:
 The dispersion relations in Platinum have been measured at 90°K by the inelastic scattering of thermal neutrons. Born-von Karman models of the force system
have been calculated by a process of linear least squares fitting to the dispersion curves. Fourth neighbour forces with weaker interactions extending to at least sixth
neighbours are required to fit the data. A frequency distribution has been computed using the force constants of the most realistic model.

 Some interesting anomalous behaviour in the [035]T1 branches of both Platinum and Palladium has been investigated
in detail at temperatures of 90,296 and 473°K. A qualitative analysis indicates that the behaviour is caused by the Kohn effect though its manifestation is rather unusual.

abstract: Thesis

abstract: Master of Science (MSc)


title: Alfred Shutz and the Problem of Intersubjective Understanding

contributor:
Hitchcock, D.
Philosophy

subject: Alfred Schutz, phenmenological investigations, Verstchen, Lebenswelt, Conscious process, belief, human understanding

abstract: Our Intention is to provide an account of Alfred Schutz's phenomenological investigations of intersubjective understanding (Verstchen) as it occurs in the life-world (Lebenswelt). After finding the interference by analogy and the behaviorist positions wanting, we develop Schutz's position as an alternative to account for this problem and find that he successfully avoids the difficulties and pitfalls associated with these traditional formulations.

abstract: Thesis

abstract: Candidate in Philosophy


title: Calculations of Neutron Emission in the Thermal Neutron Fission of U235

contributor:
Preston, M. A.
Physics

subject:
thermal neutron fission
U235
neutron emission
excitation energy distributions
evaporation theory
primary fragment velocities

abstract: No abstract provided.

abstract: Thesis

abstract: Master of Science (MSc)

abstract: Scope and contents: The probability of fission as a function of primary fragment velocities has been obtained by removing the neutron emission and instrumental dispersions from the velocities determined by Stein with time-of-flight techniques for the thermal neutron fission of u235. Each velocity was increased by 0.69% to make the average kinetic energy per fission agree with the calorimetric value of 167.1 Mev. Excitation energy distributions were obtained by using the primary fragment masses given by Cameron and assuming that the most probable charge distribution for a given mass ratio i s that which leads to the greatest energy release. Evaporation theory was used to determine the number of prompt neutrons emitted. When the excitation energy is divided equally between the fragments and a nuclear temperature of 0.59 Mev is used, the average number of neutrons emitted is 2.95 per fission.


title: Some Contributions to Inferential Issues of Censored Exponential Failure Data

contributor:
Balakrishnan, Narayanaswamy
Mathematics

subject:
A-optimality
accelerated life-testing
C-optimality
change point
competing risks
conditional inference
conditional moment generating function
confidence interval
cumulative exposure model
D-optimality
exponential distribution
maximum likelihood estimation
order statistics
parametric boootstrap method
progressive Type-I censoring
step-stress model
tail probability
Type-1 censoring
Type-II censoring

abstract:
In this thesis, we investigate several inferential issues regarding the lifetime data from exponential distribution under different censoring schemes. For reasons of time constraint and cost reduction, censored sampling is commonly employed in practice, especially in reliability engineering. Among various censoring schemes, progressive Type-I censoring provides not only the practical advantage of known termination time but also greater flexibility to the experimenter in the design stage by allowing for the removal of test units at non-terminal time points. Hence, we first consider the inference for a progressively Type-I censored life-testing experiment with k uniformly spaced intervals. For small to moderate sample sizes, a practical modification is proposed to the censoring scheme in order to guarantee a feasible life-test under progressive Type-I censoring. Under this setup, we obtain the maximum likelihood estimator (MLE) of the unknown mean parameter and derive the exact sampling distribution of the MLE through the use of conditional moment generating function under the condition that the existence of the MLE is ensured. Using the exact distribution of the MLE as well as its asymptotic distribution and the parametric bootstrap method, we discuss the construction of confidence intervals for the mean parameter and their performance is then assessed through Monte Carlo simulations. Next, we consider a special class of accelerated life tests, known as step-stress
tests in reliability testing. In a step-stress test, the stress levels increase discretely at pre-fixed time points and this allows the experimenter to obtain information on the parameters of the lifetime distributions more quickly than under normal operating conditions. Here, we consider a k-step-stress accelerated life testing experiment with an equal step duration τ. In particular, the case of progressively Type-I censored data with a single stress variable is investigated. For small to moderate sample sizes, we introduce another practical modification to the model for a feasible k-step-stress test under progressive censoring, and the optimal τ is searched using the modified model. Next, we seek the optimal τ under the condition that the step-stress test proceeds to the k-th stress level, and the efficiency of this conditional inference is compared to the preceding models. In all cases, censoring is allowed at each change stress point iτ, i = 1, 2, ... , k, and the problem of selecting the optimal Tis discussed using C-optimality, D-optimality, and A-optimality criteria. Moreover, when a test unit fails, there are often more than one fatal cause for the failure, such as mechanical or electrical. Thus, we also consider the simple stepstress models under Type-I and Type-II censoring situations when the lifetime distributions corresponding to the different risk factors are independently exponentially distributed. Under this setup, we derive the MLEs of the unknown mean parameters of the different causes under the assumption of a cumulative exposure model. The exact distributions of the MLEs of the parameters are then derived through the use of conditional moment generating functions. Using these exact distributions as well as the asymptotic distributions and the parametric bootstrap method, we discuss the construction of confidence intervals for the parameters and then assess their performance through Monte Carlo simulations.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: Turbulent Flow of Iron Ore-Water Suspensions

contributor:
Baird, Malcolm H.I.
Round, G. F.
Chemical Engineering

subject:
iron ore-water suspensions
turbulent flow
circular and horizontal ducts
heterogenous flow regime
hydraulic gradients
limit deposit conditions
oscillatory flow
pulsatile flow
air-pulsing technique

abstract: No abstract provided.

abstract: Thesis

abstract: Master of Engineering (MEngr)

abstract:
Scope and contents: This thesis describes the behaviour of iron ore-water suspensions under turbulent flow conditions. This work is divided into two parts. Part I deals with the regimes of transport under steady state flow conditions in circular and horizontal ducts. The heterogeneous flow regime is extensively analyzed; a sequential discrimination of models with an oriented design of experiments have permitted the determination of the best model to correlate hydraulic gradients for these suspensions. A critical discussion on the limit deposit conditions is also included. Part II describes the behaviour of clear water under oscillatory
flow conditions. The study demonstrates that the quasi-steady state hypothesis, i.e., fully developed flow assumption, applied to pulsatile turbulent flow under the conditions studied. Observations on the behaviour of iron ore-water suspensions under pulsatile flow are also
included. The experiments were carried out using a new air-pulsing technique.


title: A Geographical Study of Mono Township

contributor:
Burghardt, A. F.
Geography

subject: Mono, Mono Township, Geography, Physical Geography, Bedrock, Geology, Glacial History, Physiography, Climate, Slope, Drainage, Soils, Vegetation, Settlement, Agricultural development, Land use, Industrial, Recreation, Cultural, Residential, Orangeville, Urban Land Use, Southern Ontario, Slope, Drainage, Soils, Land Patents, Landmarks, Land Values, Climatic Statistics, Climate, snowfall, temperature, precipitation, Nottawasaga River, Woodlots, Density, Crop, farm, animals, population, forest, plantations, Limestone fence, Lockport Dolomite, Queenston Shale, The Nottawasaga and the Escarpment, Western spillway, Interlobate Kames, Kame Structure, Meltwater Sands, Singhampton Moraine, Violet Hill Spillway, Southern Till Moraine, Escarpment and Spillway Terrace, Spillway Gravels, The Nottawasaga and the Niagara Escarpment, The Hockey Valley Spillway, Sugar Maple-Beech Forest, Reforestation, Old Mill Site, Log Cabin, Stone house, St. John's Church, Master Feeds, Old ORagne Hall, Simcoe, Grey, Wellington, Peel

abstract:
No Abstract Provided
Thesis
Bachelor of Arts (BA)


title: An X-Ray Crystallographic Study of Na4P2O7, Ba2P2O7 and H4P2O7

contributor:
Calvo, C.
Chemistry

subject: unit cell, dimensions, x-ray, diffraction, symmetry, temperature

abstract: The symmetries and unit cell dimensions of crystals of Na4P2O7, δ-Ba2P2O7 and H4P2O7 have been determined by X-ray diffraction methods. Changes in symmetry and unit cell dimensions of Na4P2O7 as a function of temperature have been described and a model has been proposed describing the statistics of these changes. The existence of disorder in the crystal structure of δ-Ba2P2O7 has been established and the unit cell dimensions of a previously unreported low temperature form are reported.

abstract: Thesis

abstract: Master of Science (MSc)


title: The Radiation Initiated Polymerization of Styrene

contributor:
Hodgins, J. W.
Chemical Engineering

subject: polymerization, styrene, gamma radiation, initiator, pressure,

abstract: The polymerization of styrene to polystyrene was studied using gamma radiation from a Co^60 source as the free radical initiator. Conversions up to 50% were obtained and the molecular weight distribution, intrinsic viscosity, bulk viscosity, and osmotic pressure of several samples were measured. A theoretical kinetic model was developed using a slightly modified conventional kinetic scheme and employing a viscosity correction for the termination rate constant. The model predicts conversion over the range studied and molecular weight distributions are in agreement within the limitations of the experimental equipment to measure this parameter.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: Groundwater Monitoring Network Design Using Additional Objectives in Dual Entropy Multi-Objective Optimization Method

contributor:
Coulibaly, Paulin
Guo, Yiping
Civil Engineering

subject: entropy, groundwater monitoring networks, multiobjective optimization

abstract: This study explores the applicability of including groundwater recharge and water table variation as additional objective functions in a multi-objective optimization approach to design optimal groundwater monitoring networks. The study was conducted using the Ontario Provincial Groundwater Monitoring Network wells in the Hamilton, Halton, and Credit Valley regions in southern Ontario. The Dual Entropy-Multiobjective Optimization (DEMO) model which has been demonstrated to be sufficiently robust for designing optimum hydrometric networks was used in these analyses. The importance of determining the applicability in using additional design objectives in DEMO, including groundwater recharge and groundwater table seasonal variation, is rooted in the limitations of groundwater data and the time required setting up the models. While recharge allows for the capturing of spatial variability of climate, geomorphology, and geology of the area, the groundwater table series reflect the temporal/seasonal variability. The two set of information are complementary and should provide additional information to the DEMO for optimal network design. Two sources of groundwater recharge data were examined and compared; the recharge provided by the local conservation authorities, calculated using both the Precipitation-Runoff Modeling System (PRMS) and Hydrological Simulation Program--Fortran (HSP--F), and the recharge calculated in situ using only PRMS. The entropy functions are used to identify optimal trade-oﬀs between the maximum possible information content and the minimum shared information between each of the existing and potential monitoring wells. The additional objective functions are used here to quantify the hydrological characteristics of the vadose zone in the aquifer as well as the potential impacts of agricultural, municipal, and industrial uses of groundwater in the area, and thus provide more information for the optimization algorithm to use. Results show that including additional design objectives significantly increases the number of optimal network solutions and provides additional information for potential monitoring well locations. These results suggest that it is worthwhile to include recharge as a design objective if the data is available, and to include groundwater table variation for the design of monitoring wells for shallow groundwater system.

abstract: Thesis

abstract: Master of Applied Science (MASc)


title: A Modified Orthogonalized Plane Wave Method for the Calculation of Band Structures in Transition Metals

contributor:
Twose, W.D.
Physics

subject: orthogonalized, plane wave, band structures, metal

abstract: This thesis describes some modifications to the orthogonalized plane wave method designed to make the method applicable to calculating the band structure of transition metals. The procedure is to augment the basis set of OPW's by including functions which vanish in the interstitial regions but represent well the outer core functions and the d-band states near the nucleus. The method is applied to the transition metal niobium, with emphasis on the applicability of the procedure. The convergence of the method is discussed and the resulting band structure of niobium is presented.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: Caledon Township: A Geographical Appreication

subject: Caledon Township, Physical Elements, History, Settlement, Agriculture, Agricultural geography, scenic tour, Bedrock, surface topography, outcropping geologic formations, Pleistocene Deposits, Soil Catenas, Farming, Economic, social spheres, climatic chart, climate, population, population growth, development, Escarpment, Bedrock formation, meltout depression, Queenstone shale, sandyloam, clay loam, Listowel Loam, Harriston Loam, Grain field, Contour cropping, roat crops, corn field, horse breeding, Idle Land, Grazing, Woodlot, Cataract, Willow scrub, Reforestation, Belfountain, Mono Mills, Brickyard, Inglewood, Church, Frame houses, sandstone slabs

abstract:
No abstract provided
Thesis
Bachelor of Arts (BA)


title: Effect of Capillary Dimensions On Die Swell of Molten Polymers

contributor:
Vlachopoulos, J.
Chemical Engineering

subject: capillary dimensions, die swell, molten polymers, low density, high density, polyethylene, polypropylene, polystyrene, swell, L/D, swell index, d/D, graph, cruves, Bagley's decaying equation, Deborah number, shear strains

abstract:
 The effect of capillary dimensions on the die swell of molten polymers is investigated. Low and high density polyethylene, polypropylene, polystyrene are used to make investigation It is found the die swell decreases vii th L/D. The plot of die swell index (d/D) vs. L/D has the shape of anexponential decay curve.

 Bagley's decaying equation is used to fit the data. The effect of Deborah number on die swell phenomenon is also studied. 'I'he relationship between the recoverable shear strains of infinitely long capillary and the one with dimensions ratio L/D is obtained. This relationship could be used to estima te the die swell of short capillary from its value at equilibrium and polymer characteristics.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: Use of Low Order Models for Near-Optimal Control of High Order Systems

contributor:
Sinha, N.K.
Electrical Engineering

subject: high order systems, cost, control, optimal,

abstract: Ten different reduced models, of a particular test system are selected. Two cost functions are selected and the test system minimum cost is found for each. The model optimal controls are found for each cost function and are used to provide sub-optimal control of the system using two different methods. The system cost is calculated for each case and compared to the minimum attainable. The reduction methods are compared with a view to application for the near-optimal control of a linear system.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: BENDING CHARACTERISTICS AND STRETCH BENDABILITY OF MONOLITHIC AND LAMINATED SHEET MATERIALS

contributor:
JAIN, MUKESH
Mechanical Engineering

subject:
SHEET METAL FORMING
BENDING
FINITE ELEMENT MODELLING
DIGITAL IMAGE CORRELATION
STRAIN ANALYSIS
STRETCH BENDABILITY
NUMERICAL MODELLING
LAMINATED SHEETS

abstract:
Bending deformation characteristics of monolithic, bi-layer and tri-layer laminate sheet materials are studied using Analytical and FE models in this work. The analytical model, based on advanced theory of pure bending considers von Mises yielding, Ludwik hardening law and Bauschinger effect for various laminate constituent thickness ratios. The principal stresses and strains through the thickness and, change in relative thickness at specified bend curvatures are obtained as a function of increasing curvature during bending. Additionally, 2D and 3D finite element (FE) based models for bending are developed to overcome simplifications of the analytical models such as the effect of specimen width on strain distribution. Further, to experimentally assess and validate bending characteristics from the analytical models, a new experimental bend test-jig that is closer to pure bending is developed. The experimental set-up is an open concept design that allows access to the tensile surface as well as through-thickness region for recording and analyzing strains using an online strain mapping system based on digital image correction (DIC) method. Experimental bending is carried out on annealed AA2024 monolithic aluminum alloy sheet and Steel/Aluminum (SS400/AA1050) bi-layer laminate sheet at different thickness ratios. The model and experiments are studied in terms of stress and strain distribution as a function of relative thickness for different clad to matrix thickness ratios.
Further the case of simultaneous bending and stretching over small radius bending is analyzed for limit strain prediction using an existing limit strain criterion based on major strain acceleration. An angular stretch bend test is used to subject an hour-glass shaped

AA20240-O aluminum sheet specimen to simultaneous stretching and bending deformation while continuously imaging the critical tensile surface region using an optical camera. The strain development in the critical region is subsequently analyzed using digital image correlation (DIC) method. The effect of DIC parameters such as facet size, facet step, and effect of curve fitting procedures on limit strain are studied. An average limit strain of 0.2 is obtained for AA2024 for a facet size of 9x9 pixels, a facet step of 5 pixels and by applying a 5th order polynomial curve fit to the strain data. The results obtained are comparable with a limit strain of the material. The results are compared with a commercially available tri-layer laminate sheet material Alclad 2024 that has 80 μm thin layer of soft AA1100 on both surfaces of harder AA2024 core material. An improved stretch bendability limit strain of 0.24 for Alclad 2024 tri-layer specimen was predicted by utilizing the major strain acceleration criterion. The thin AA1100 protective layer produced a positive effect on the stretch bendability of Alclad 2024 when compared with monolithic AA2024 specimen.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: A Display System for Bliss Symbolics

contributor:
Milner, Morris
Engineering Physics

subject: bliss symbols, storage space, data compaction

abstract:
 A microprocessor driven display was built and programmed for the storage and reproduction of Bliss symbols. An explanation is offered for the success of the symbol language in teaching the handicapped.

 The hardware was designed to be inexpensive enough for classroom use, but still deliver adequate flexibility and resolution. Due to the complexity and variety of the symbols a method of data compaction was developed to reduce the required storage space.

 Initial tests are presented and suggestions are made for continuing the work.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: Carbon-13 Nuclear Magnetic Resonance Spectra of Heterocyclic Compounds

contributor:
Bell, Russell Arthur
Chemistry

subject: carbon-13, nuclear, magnetic, resonance, heterocyclic,

abstract: Experimental carbon-13 nuclear magnetic resonance chemical shifts are given for substituted 1,3-dioxanes, tetrahydrofurans, dihydro-2-furanones and succinic anhydrides. The experimental data are used to improve and extend the carbon-13 chemical shift prediction parameters which allow one to estimate with considerable accuracy unknown chemical shift values.

abstract: Thesis

abstract: Master of Science (MSc)


title: Numerical Control Programming Languages for Lathes

contributor:
Tlusty, J.
Production

subject: Numerical control, lathe, programming, languages

abstract:
Abstract Not Provided.
Thesis
Master of Engineering (MEngr)


title: The de Haas-Van Alphen Effect in Antimony-Tin Alloys

contributor:
Datars, W.R.
Physics

subject: de Haas-Van, Alphen effect, Fermi, antimony, alloys, tin, electrons

abstract:
 The de Haas-van Alphen effect has been used to measure the Fermi surface areas, cyclotron masses and Dingle temperatures in antimony and its alloys containing less than 0.3 percent tin. The Fermi surface of each alloy was similar to the pure antimony surface. However the hole surface increased in size and the electron surface shrunk since tin removes electrons from the alloy. The cyclotron masses increased and decreased for holes and electrons respectively, giving a definite indication of nonparabolic conduction and valence bands. The cyclotron masses were found from the temperature dependence of the dHvA amplitude after interfering dHvA frequency components were removed by a Fourier analysis technique. The Dingle temperature increased roughly linearily with tin concentration.

 A comparison of the hole and electron Fermi surface volumes with the number of tin atoms added to the alloys shows that one tin atom removes one electron from the alloy as expected from the unit valence difference between antimony and tin. This value is higher than that found by other workers using different techniques.

 The shapes of the energy bands along with the cyclotron masses have been compared with several band models. An ellipsoidal band provides a rough overall description of both holes and electrons while an ellipsoidal nonparabolic band describes the mass behaviour on alloying more accurately. A pseudopotential band calculated using the method and potential of Falicov and Lin (1967) was also compared with the data.

 The observed relative frequency changes were used to compare the data with the rigid band model of alloying. The bands are rigid for low concentrations. At higher concentrations there are deviations apparently caused by the cyclotron mass change and an axial ratio change in the hole Fermi surface.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: Experimental Studies of Combined Reliability

contributor:
Siddall, J.N.
Mechanical Engineering

subject: reliability, Combined Dependability, lamps, machine

abstract:
 In the field of Reliability, a new concept is introduced. The Combined Dependability theory is put forth in this thesis.

 Attempts are made to prove this theory experimentally by use of accelerated failure tests of GE-47 miniature lamps. The lamps are tested individually and ten in series. The individual lamp test results are then used for the prediction of the reliability of the ten lamps in series.

 The ten lamps in series simulate a machine with ten components. A failure of one of the components will produce a failure of the machine. The reliability of the machine can be found if the reliability of each part is known. The single part when tested individually must be subjected to the same stresses and conditions that it would encounter when operating in the machine. If this is not accomplished, the machine's calculation of reliability is invalid.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: A Raster-Scan Video Graphics Display System Implemented on a KIM Microcomputer

contributor:
Solntseff, N.S.
Computation

subject: raster-scan, microcomputer, graphics, memory, processor

abstract:
 The "microelectronic revolution" and the accompanying decrease in the cost of semiconductor memory has increased the availability of raster-scan graphical displays, yet, as pointed out in a recent survey [BAE79], the implementation of graphics software for raster-scan systems has lagged behind that for random-scan systems. The aim of the work
described in this report has been to apply random-scan display techniques to a system employing a relatively inexpensive raster-scan device. The system, incorporating a segmented display file processor, is implemented on a KIM^TM microcomputer. The display device is composed of a Micro Technology Unlimited^TM (MTU) 8K Visable Memory^TM (VM) video
board and a standard TV monitor.

abstract: Thesis

abstract: Master of Science (MSc)


title: Some Aspects of the Water Packing Problem

contributor:
Spinks, N.
Rennick, D.
Engineering Physics

subject: water packing, transition node,

abstract: This is Part B of Thesis.

abstract:
 This report is divided into two parts. The first part contains the results of a simulation performed by the two-phase thermohydraulics code Firebird.

 The second part of this report deals with the "water packing" problem. Its mathematical and physical interpretations are discussed in detail and a method for identifying a transition node together with an alternate mathematical treatment of the boiling boundary are also included.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: Modelling Pure Thorium Bundle Implementation in the CANDU-6 Reactor

contributor:
Luxat, John
Engineering Physics

subject: Thorium CANDU-6 CANDU Multi-cell DRAGON DONJON U-233 Th-232 Breeding

abstract:
Fuels comprised of the element thorium have become increasingly popular with researchers and the public as the next generation fuel  due to its ability to produce its own fissile element (U-233) and generate lower concentrations of heavy actinides. The use of thorium can  possibly lead to a self-sustaining cycle whereby the addition of fissile material is not required and that the fuel can breed sufficient amounts of U-233 for a continuous supply. Research into thorium use in CANDU reactors has mainly been focused on using driver elements such as U-235 or Pu-239 to initiate the nuclear reaction by taking advantage of bundle design or by mixing the thorium and driver fuel together; however, these methods have added complexities and may not lead to a pure thorium fuel cycle, but extend the life of current nuclear fuels used.
 This thesis will investigate a simpler means of utilizing thorium for the intent of breeding U-233  through the use of pure thorium bundles in a once-through cycle by the ways of a heterogeneous core loading in a CANDU-6 reactor model. A 3x3 multi-cell model using DRAGON 3.06K will simulate the dual fuel model by having the centre lattice  enclosing the thorium bundle and the outer eight lattices  enclosing the enriched uranium bundles as the driver fuel. Next, the diffusion code DONJON 3.02E is used to produce time-average, instantaneous, and initial startup full-core simulations.  As well, a brief look at the refuelling operations on the thorium channels will be done.
 The presence of a thorium bundle places a negative reactivity load on the multi-cell, but causes a positive insertion of reactivity for a coolant void and shutdown scenario. In the full-core  modelling, the final core configuration chosen shows that thorium channels should be located in the inner core rather than in the most outer channels to produce a flattening effect on the radial profile. Thorium channels will require a combination of SEU and thorium bundles  in an attempt to maintain channel power levels. Specifically, the use of 4, 6, or 8 Th bundles were investigated. The most optimal core performance  shown has a radial form factor of 0.816, a total average core burnup of 18.32 GWd/t, and operates within designed power limits.
 It is possible to implement pure thorium bundles  into a reactor  set in a dual fuel mode. A  careful consideration of where thorium bundles  should be located in the core can help  flatten the radial power distribution and help the reactor operate within the operating licensing parameters without the use of adjuster rods while breeding U-233 for a future thorium fuel cycle.

abstract: Thesis

abstract: Master of Applied Science (MASc)


title: Fluorous Supports and Oxidants for Radiochemistry, Tetrazine Synthesis, and Hydrogen Sulfide Processing

contributor:
Valliant, John F.
Chemistry and Chemical Biology

subject: Radioiodination; Fluorous oxidant; Tetrazine; Labelling methods; 125I; instant kits; fluorous

abstract:
A new class of fluorous materials was developed to create a hybrid solid-solution phase strategy for the expedient preparation of 125I-labelled compounds, without the need of HPLC purification. The system is referred to as a hybrid platform in that it combines solution phase labelling and fluorous solid-phase purification in one step as opposed to two separate individual processes. Initial success was achieved by treating fluorous stannanes, coated on fluorous silica, with [125I]NaI and chloramine-T (CAT) as the oxidant, where the desired nonfluorous radiolabelled products were isolated in minutes in biocompatible solutions in high purity (>98%) free from excess starting material and unreacted radioiodine. This platform was initially developed through a model system based on a fluorous benzoic acid derivative. The platform was then validated with simple aryl and heterocyclic derivatives, known radiopharmaceuticals including meta-iodobenzylguanidine (MIBG) and iododeoxyuridine (IUdR), and a new agent with high affinity for prostate-specific membrane antigen (PSMA).
The limitation of the platform was the presence of non-radioactive UV impurities which came from the oxidants employed. To resolve this issue a new class of fluorous oxidants based on chloramine-T (CAT, F-CAT) were prepared. F-CAT, was prepared in 87% overall synthesis yield from commercially available starting materials and found to be effective in labelling arylstannanes and proteins with [125I]NaI. The utility of the oxidant was further demonstrated in successfully preparing a radioiodinated tetrazine (125I-Tz) through a concomitant oxidation-halodemetallation reaction. 125I-Tz can be used to label biomolecules through bioorthogonal coupling reactions with prosthetic groups containing strained alkenes including norbornene and trans-cyclooctene (TCO). The reported hybrid platform labelling approach is readily accessible and requires minimal radiochemistry expertise and should therefore find widespread use.
It is also noteworthy that a second generation of the fluorous oxidant, F-CAT2, was also prepared with the aim of obtaining an oxidant which has a higher solubility in perfluorinated solvents. Application of F-CAT2 for oxidation of hydrogen sulfide to elemental sulphur in a fluorous-aqueous biphasic system was demonstrated. This approach offers a new metal-free approach to scrubbing sour gas wells and demonstrates that the fluorous oxidants developed here have utility beyond radiochemistry.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: Effects of abductive reasoning training on hypothesis generation abilities of first and second year baccalaureate nursing students

contributor:
Akhtar-Danesh, Noori
Nursing

subject:
Abductive reasoning
Clinical reasoning
Hypothesis generation
Problem-based learning
Nursing education
Expertise
Accuracy

abstract: There is much debate on the best way to educate students on how to generate hypotheses to enhance clinical reasoning in nursing education. To increase opportunities for nursing programs to promote the discovery of accurate and broad-level hypotheses, scholars recommend abductive reasoning which offers an alternative approach to hypothetico-deductive reasoning. This study explored the effects of abductive reasoning training on hypothesis generation abilities (accuracy, expertise, breadth) of first and second year baccalaureate nursing students in a problem-based learning curriculum. A quasi-experiment with 64 participants (29 control, 35 experimental) was conducted. Based on their allocation, study participants either took part in abductive reasoning training or informal group discussion. Three different test questionnaires, each with a unique care scenario, were used to assess participants’ hypothesis generation abilities at baseline, immediate post-test and one-week follow-up. Content validity for care scenarios and other study materials was obtained from content academic experts. Compared to control participants, experimental participants showed significant improvements at follow-up on hypothesis accuracy (p=0.05), expertise (p=0.006), and breadth (p=0.003). While control participants’ hypotheses displayed a superficial understanding of care situations, experimental participants’ hypotheses reflected increased accuracy, expertise and breadth. This study shows that abductive reasoning, as a scaffolding teaching and learning strategy, can allow nursing students to discover underlying salient patterns in order to better understand and explain the complex realities of care situations. Educating nursing students in abductive reasoning could enable them to adapt existing competencies when trying to accurately and holistically understand newer complex care situations. This could lead to a more holistic, person-based approach to care which will allow nursing students to see various health-related issues as integrated rather than separate.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)

abstract: This study explored the effects of a training program on hypothesis generation abilities of nursing students. The training program aimed to teach students how to think more broadly about care situations. Student’s hypothesis generation abilities were measured through the use of three care scenarios, each of which was presented before, immediately after and one-week after the training program. Only first and second year nursing students were included in the study. About half of the students were provided with the training while the other half were provided with informal discussion about hypothesis generation. After one-week, it was discovered that students who received the training had improved significantly in their ability to generate broad hypotheses. These students also generated hypotheses that were more accurate than the other group of students who did not receive the training. Due to the training, students’ abilities in discovering the important aspects of the care situation also improved.


title: The Effectiveness of a Stormwater Detention Pond in Enhancing Water Quality

contributor:
Drake, John J.
Geography

subject:
detention pond
pollutant loading
water pollution
trace metal
organic pollutants
bacterial pollutants
Electron Capture Gas Chromatography
Storm Water Management model
water quality

abstract: This research paper fulfills the requirements of Geography 4C6.

abstract:
This paper is an introductory study on the ability of a detention
pond to reduce pollutant loading to a receiving water body. Three
forms of water pollution are analysed in this study, trace metal (V,
Ti and Mn in the water and on suspended solids and bottom sediments), organic and bacterial (bacterial indicators of fecal coliform and fecal streptococci are utilized) pollutants. Each pollutant type requires a different form of analysis to obtain concentrations for targeted pollutants. V, Ti and Mn concentrations were obtained from Instrumental Neutron Activation Analysis (INAA), organic concentrations were acquired by Electron Capture Gas Chromatography (ECGC) and bacterial concentrations were obtained from various laboratory techniques performed by technicians in the Microbiology Lab at McMaster University and in the Provincial Health Laboratories in Hamilton, Ontario. Suspended solid concentration are also analysed to determine the pond's effectiveness in reducing suspended solids load and thus the pollutants they carry. The Storm Water Management Model
was used to estimate total pollutant loading into the pond via a
combined sewer overflow (CSO). The pollutant concentrations obtained were analysed spatially through the sampling network and temporally between sampled dry and wet weather periods. The result of this study has led to the disturbing conclusion that the detention pond appears to have little or no effect on enhancing water quality.

abstract: Thesis

abstract: Bachelor of Science (BSc)


title: The Origin of the O-methyl and the N-methyl Groups in the Alkaloid Ricinine

contributor:
Kirkwood, S.
Chemistry

subject:
O-methyl origin
N-methyl origin
ricinine
Ricinus communis
alkaloid
methionine

abstract: The origin of the 0 -methyl and the N -methyl group in the alkaloid ricinine has been determined. Carbon 14 labelled sodium bicarbonate sodium formate and C14 methyl labelled L-methionine and choline were administered to growing seedlings of Ricinus communis which elaborate the alkaloid ricinine. Methionine was the only metabolite that produced C14 activity in the alkaloid. The activity was located entirely in the methyl groups and the specific activity of the O-methyl and N-methyl group was found, within experimental error, to be identical.

abstract: Thesis

abstract: Master of Science (MSc)


title: Computational Study of the Optimization of a Catalytic Reactor for a Reversible Reaction with Catalyst Decay

contributor:
Crowe, C.M.
Chemical Engineering

subject: optimal, policy, decay, catalytic, reactor, reversible

abstract:
 The optimal temperature policy with time is sought which maximizes the total amount of reaction in a fixed time in a tubular reactor with uniform temperature and decaying catalyst for a single reversible reaction.

 A numerical procedure together with theoretical developments is used to solve this problem for two kinetic models. The problem is treated in the format of Pontryagin's Maximum Principle.

 Computer listings are given in the Appendix for the following cases
A) Optimal policy for irreversible reactions
8) Optimal policy for isothermal irreversible reactions
C) Optimal policy for reversible reactions.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: A Study of Germanium Hydrides, Anions and Related Species

contributor:
Birchall, T.
Chemistry

subject: Germanium hydrides, anions, molecule, dipole, charge, liquid

abstract:
 The relative acidities of some aryl germanes have been measured in liquid ammonia.

 The NMR spectra of phenyl silane and phenyl germane have been completely analysed and the chemical shifts shown to arise from the presence of an electric dipole in the molecule. The NMR spectrum of phenyl germyl anion was unambiguously assigned and partially analysed. The results are consistent with little delocalization of the negative charge from the Ge onto the ring.

 The vibrational spectra of the germyl anion have been observed and the geometry of the molecule estimated from a normal coordinate analysis of the data.

 The Raman spectrum of liquid ammonia-D3 has been measured and two bands in the Raman spectrum of liquid ammonia have been reassigned.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: Studies With the Deuterium Mass Spectrometer

subject:
Chalk River
atomic energy
heavy water
deuterium oxide
deuterium mass spectrometer
McMaster University
operating conditions
grid leaks
applications

abstract: In the atomic energy pile at Chalk River, heavy water (deuterium oxide, D2O) is to be used as a moderator. Early in 1944, it became evident that frequent determinations of the isotopic composition of D2O samples would be required. For this purpose, there was obtained from the American authorities a mass spectrometer specially designed for routine hydrogen isotope analysis. This instrument was assembled and put into operation at McMaster in the summer of 1944. During the course of subsequent work, two other deuterium mass spectrometers were built in this laboratory, following the design of the instrument sent from the United States; one of these has now been installed at the plant site, and a second is to follow at an early date. The studies reported below involved the determination of operating conditions, the measurement of grid leaks, of the order of 10^10 ohms, and the investigation of further applications of the deuterium mass spectrometer.

abstract: Thesis

abstract: Master of Science (MSc)


title: Fibre Optic Telephone System Optical Components

contributor:
Marton, J. P.
Engineering

subject:
fiber optics
fibre optics
telephone
fusion splice technique
couplers
connectors
splices
sources
detectors
star coupler

abstract:
One of the major purposes of this project was to demonstrate optical components which will be used in fibre optic distribution systems. These include the fibre itself, couplers, connectors,
splices, sources and detectors. All components used are state-of-the-art, the star coupler and fusion splice technique being developed by the author during the completion of the project. The star coupler has proved to have one of the lowest insertion losses of any such component to date. Although the telephone system demonstrated has only 3 stations, very similar or identical components would be used in an expanded network.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: A One Dimensional Model for a Non-Linear Meson Field

contributor:
Nogami, Y.
Physics

subject: repulsive, meson field, nonlinear, nuclear forces,

abstract: A repulsive meson-meson interaction was suggested many years ago (1951 by Schiff) as a possible mechanism for nuclear saturation, but very little has been done since then. This is mainly because the meson field equation becomes nonlinear due to the meson-meson interaction. We realized that the nonlinear field equation is analytically solvable, within classical and adiabatic approximations, if the space is reduced to a one-dimensional one. Within the above context we investigate the effect of the meson-meson interaction on nuclear forces. The approximations which Schiff used are critically examined. A variational method for determining the meson field, which Schiff suggested but did not fully investigate, is found to be a very efficient approximation. Finally, quantum corrections are briefly examined.

abstract: Thesis

abstract: Master of Science (MSc)


title: Ionization Chamber Dosimetry for High Energy Photon and Electron Beams: An Experimental Study

contributor:
Cormack, D.V.
Engineering Physics

subject: ionization chambers, electron, photo beams, energy,

abstract: Part A of two Project Reports; Part B can be found at: http://hdl.handle.net/11375/17692

abstract:
 A number of recently published papers have been critical of the values of CE and Cλ by the ICRU as absorbed dose conversion factors for ionization chambers used in electron or photon beams.

 This report examines the subject in light of these recent works. Presented is a review of both theoretical and experimental results published to date along with the results of experimental work carried out at this facility. The present study concentrated on the measurement of the absorbed dose conversion factors for electrons and 25 NW photons. It also attempted to determine how the conversion factors might be influenced by such factors as chamber design buildup cap thickness and composition, and phantom composition.

 Measurements were made using electrons with 10 to 32 MeV initial energy and a 25 MeV photon beam, all produced by a Sagittaire Model Therac 40 linear accelerator. Checks on the stability of the measurement system were made using a 60Co source. Fricke ferrous sulfate dosimetry was used for absorbed dose measurement in the determination of CE.

 The results of the study would indicate that there
is little or no effect on the measured values of CE or Cλ introduced by either the sleeves or phantoms for the radiation qualities studied. The results of the absorbed dose conversion factor study would indicate that the values recommended by the ICRU are sufficiently accurate for use in most instances. The data would tend to support the arguement that if there is an error in one of the ICRU derivations, the error in theory lies in the CE determination rather than that for Cλ.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: A THROMBOELASTOGRAPHY STUDY ON THE EVALUATION OF CLOT FORMATION IN PLATELET-DEPLETED WHOLE BLOOD IN THE PRESENCE OF UNFRACTIONATED HEPARIN OR LOW-MOLECULAR WEIGHT HEPARIN

contributor:
Chan, Howard
Health Sciences

subject: Thrombocytopenia, Thromboelastography, Heparin, Platelets

abstract: The use of an appropriate anticoagulation regiment for the treatment of venous thromboembolism (VTE) in patients with concomitant thrombocytopenia is based on anecdotal evidence and the opinions of managing physicians. The current guidelines suggest that therapeutic levels of anticoagulants may be safely administered to patients who have a minimum platelet count of 50 x 109/L. However, it has recently been suggested that the minimal platelet threshold for safe anticoagulation treatment can be provided at a reduced platelet count of 30 x 109/L. Thus, in order evaluate these platelet threshold we used a thromboelastography (TEG) model to evaluate the clotting parameters of whole blood at predefined platelet counts in the presence of unfractionated heparin (UFH) and low-molecular weight heparin (LMWH). Due to the importance of red blood cells on hemostasis a whole blood TEG model was designed in order to mimic in vivo hemostasis. Clotting was initiated using different concentrations of tissue factor for each anticoagulant at therapeutic and prophylactic levels of UFH and LMWH at predefined platelet counts. In the presence of therapeutic concentrations of either UFH or LMWH, there were no significant differences in TEG parameters of whole blood clots between platelet counts of 30 x 109/L and 50 x 109/L when clotting was driven by the extrinsic pathway. At prophylactic levels of LMWH clot formation was less compromised. Furthermore, no significant difference was noted between platelet-depleted blood (PDB; <10 x 109/L) and 30 x 109/L with respect to r-time. This suggests LMWH at prophylactic levels has no significant bearing on clot formation at a lower platelet threshold versus therapeutic levels of LMWH. Overall, it shows that clot formation is similar for UFH and LMWH when platelet counts are reduced from 50 x 109/L to 30 x 109/L. This work provides insight on the potential for anticoagulation at a reduced platelet threshold in thrombocytopenic conditions.

abstract: Thesis

abstract: Master of Science (MSc)


title: A Study of the Square Wave Transformation of Point Processes

subject: square, Wave transformation, point processes

abstract:
Abstract Not Provided.
Thesis
Master of Science (MSc)


title: A Study Of The Rurbanization Process In Brantford Township

contributor:
Reeds, L. G.
Geography

subject: farmers, non-farmers, rurbanization, full time farmer, part time farmer, rural, urban, land use, geography, low-density residences,  agricultural, out-migration

abstract:
 This study examines the problem of "rurbanization," which is a term that has been applied to the process by which
rural areas are being changed by urban influences. This implies
more than the traditional geographic concept of land-use change at the rural-urban fringe, but is concerned with bagic changes in the agricultural industry relating to appearance, land use, nengity and social structure.

 In rural Southern Ontario, there are two main phenomena occurring to effect these changes: the increage in part-time farming and in low-density residences. This study is concerned more specifically with an examination of these two phenomena.  Its two main objectives are to gee how these two are interrelated and how they have affected agriculture and rural society.

 The study achieveg thege objectives through the use of a questionnaire admtnigtered to residents of Brantford township, a rural area with a thriving agricultural industry, but at the same time under considerable stress from urban pressures. Three types of residents were surveyed: full-
time farmers, part-time farmers and non-farmers. The data collected was  subjected to discriminant and cross-tabulation
analyses in order to observe similarities and differences among the three groups . These similarities and differences
allowed inferences concerning the acceptance or rejection of
six postulated hypotheses.

 The following general conclusions result from the analysis:

 Part-time farmers and rural non-farmers are predominantly former urbanites who have migrated to rural areas. Both groups share similar occupations and have lived at the rural location for a similar length of time, but non-farmers tend to be older an to have been born and raised on a farm. However, there does exist a significant minority of part-time farmers who ere former full-time farmers. Both phenomena appear to be fairly permanent arrangements as the overwhelming majority of both groups wished to maintain their present status.

Full-time farmers tend to have a larger size of holding than part-time farmers. Part-time farmers place less emphasis on livestock and tobacco as the predominant crop than do full-time farmers, and tend to place a greater emphasis upon corn and mixed grains as cash crops. The type and quality of land that is occupied and the attitude toward the preservation of agricultural land do not vary significantly by group. All three groups were strongly in favour of preservation of land for farming. The participation rates of part time and non farmers in the rural organizations of the township and in the urban organizations of nearby towns are not significantly different from those of full-time farmers.

 The study has confirmed some of the findings of other researchers and has in turn shed some new light on the "rurbanization" problem. Urban out-migration has been found to be the most important cause of the problem. Thus, the problem appears to be the result of a social phenomenon rather than a physical one, and the phenomena causing the problem appear to be persistent and permanent. It may also be noted that the choice of alternative, either part-time farming or non-farming residency, is somehow related to the age and location of birth and childhood of the urban out-migrant. Significantly, more part-time farmers were born in city and more non-farmers were born on a farm. It may be argued that is precisely opposite to the situation that might be expected.

abstract: Thesis

abstract: Bachelor of Arts (BA)


title: Affinity Chromatography Mass Spectrometry Assays For Small Molecule Screening

contributor:
Brennan, John D.
Chemistry and Chemical Biology

subject:
chemical biology
bioanalytical chemistry
mass spectrometry
enzymes
inhibitors
screening
natural products

abstract: Enzymes are implicated in many diseases including neurodegenerative, cancer, immune deficiency, and inflammatory disorders.  There is a constant need to develop novel drug compounds that target enzymes in order to modulate their function, thus treating the disease state.  These compounds are typically small molecules with affinity to the enzyme active site or an allosteric site.  In order to discover novel compounds for treating disease, the interaction between an enzyme and a small molecule must first be identified and then characterized.  With the target enzyme known, it is beneficial to screen libraries of compounds against the target.  Immobilizing the enzyme allows for pre-concentration of ligands on the surface and therefore increased signal enhancement, as well as permitting multiple wash steps and enzyme reuse.  Immobilized enzyme columns are optimal for coupling to a variety of detection devices by way of liquid chromatography, including absorbance or mass spectrometric detection.  Immobilized enzyme reactors (IMERs) were generated and optimized for two target molecules, acetylcholinesterase (AChE) and adenosine deaminase (ADA), for rapid function-based screening of enzyme inhibitors in mixtures.  The IMER mode is useful for increasing throughput and facilitating the identification of hit mixtures, but it is slow and tedious to manually deconvolute hit compounds from mixtures and the IMER method is not amenable to natural product extracts, which are good sources of structurally diverse compounds that are more likely to result in a hit compound.  Bio-selective solid-phase extraction (BioSPE) is an orthogonal method of isolating and identifying enzyme inhibitors in a single step, and was used to easily deconvolute complex mixtures, rapidly identifying to key compounds EHNA and MAC-0038732 out of mixtures using ADA columns.  A data dependent acquisition MS method was developed and used to screen a set of fungal endophyte extracts, identifying two potentially novel inhibitors that were confirmed by IMER-MS/MS.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)

abstract: The discovery of new drug compounds is crucial for the treatment of diseases.  Enzymes are proteins that turn a substrate into a product; and in diseases they can often malfunction, overproducing the product.  Small molecule compounds can sometimes inhibit enzyme function and can be further developed into therapeutic drugs.  This thesis describes a method for detecting small molecule inhibitors that bind to an enzyme that is immobilized in a small column.  Once the small molecule is bound to the immobilized enzyme, it can be detected by either showing that enzyme function is inhibited or by removing the compound from the enzyme and identifying the compound by mass spectrometry.  These methods can quickly identify compounds at extremely low levels from complex mixtures, such as natural product extracts.


title: Medonte Township: A Study IN Settlement and Land Utilization

contributor:
Wood, H.
Geography

subject: Medonte Township, land utilization, physical environment, adpot, living, agricultural activities,  Orillia, Canadian Shield, Putnam and Chapman, LAke Simcoe Upland, physical geography

abstract:
No Abstract Provided
Thesis
Candidate in Philosophy


title: The Geomorphic Implications of the Geo-Hydrology of Gypsum Karst Areas

contributor:
Ford, D.C.
Geography

subject: Gypsum Karst, geo-hydrology, rising waters, geomorphic, rock solution,

abstract:
 Gypsum karst areas in British Columbia and Wood Buffalo National Park, Alta.-N.W.T. are described. Investigation of the geo-hydrology of these areas, particularly specifically
the saturation states of rising waters, is demonstrated to be a valuable tool in defining the major geomorphic processes acting. The combination of thermo-dynamic equilibrium studies
of the gypsum and limestone processes serves to define zones within which the dominant controls of rock solution can be inferred.

 The commonly accepted parameters of limestone solution equilibria (Picknett's curves) are examined and shown to be incorrect.
Use of the parameters and indices presented in this thesis gives much better accordance with observed characteristics of karst waters.

abstract: Thesis

abstract: Master of Science (MSc)


title: Communication Aids For Cerebral Palsied Children

contributor:
Milner, M.
Electrical Engineering

subject: design, construction of communication aids, cerebral palsy, electronic communication, Ontario Crippled Children's Centre, PDP11-10, minicomputer

abstract:
 This dissertation deals with the problems associated with the design and construction of communication aids for children with cerebral palsy. Attention is focused on an electronic communication board developed at the Ontario Crippled Children's Centre in Toronto which displays a matrix of Bliss symbols and English words that can be selected by appropriate activation of an interface which controls the sequential illumination of the symbol blocks. A number of interfaces were constructed. Appropriate electronic switching arrangements were incorporated with the interfaces in order to achieve activation of the interface upon the initiation of a movement rather than the maintaining of a position. The communication board was interfaced to a PDP 11-10 minicomputer which was used to provide a dual output of the word and associated Bliss symbol, selected using 'interface control, on a teletype and oscilloscope screen respectively.

 Descriptions of associated communication type devices include an electronic attention getting device, page-turner interface, and programmed learning board.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: Optical Fiber Attenuation Measurement

contributor:
Straus, J.
King, F.D.
Marton, J.P.

subject: optical fibers, attenuation, subtleties, steady-state, measurement

abstract:
 Optical fibers are becoming so good that their optical and mechanical properties are fast approaching fundamental limits. It has also become evident that there is a requirement for establishing accurate and precise measurement techniques of these properties. The optical loss is the most important parameter characterizing fiber. This project reviews the subject of loss (or attenuation), its measurement and some of its subtleties.

 Presently at BNR there are two attenuation measurements made:
(1) one is the LED steady-state attenuation at λ≅840 nm, which makes use of a "pigtail" launching fiber and
(2) the second is the spectral attenuation from 600-1400 nm. Both measurement techniques were developed by the author and Dr. K. Abe during the summer work term and made considerable improvements in both accuracy and speed over previously established methods. Some of the subtleties of attenuation which were also studied during this period were the effects of different launch conditions, and environmental effects such as those caused by temperature and ice. The extensive temperature tests done on the fiber led to the change from "hytrel" and nylon as coating materials to the use of silicone (which is still in use at BNR).

 Throughout the paper, results of the measurements have been given for several types of fibers because some of them have very unique characteristics and applications.

 All of the data displayed for this project was gathered by the author unless otherwise noted.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: Regular Sets, Scalar Multiplications and Abstractions of Distance Spaces

contributor:
Lane, N.D.
Mathematics

subject: motion distance, regular set, Euclidean spaces, abstracted, metric

abstract:
 This thesis is both classically and abstractly oriented in a geometrical sense. The discussion is centred around the motion distance.

 In the first chapter, the concept of a regular set is defined and discussed. The idea of a regular set is a natural generalization of equilateral triangles and regular tetrahedra in Euclidean spaces.

 In chapter two, two kinds of scalar multiplication associated with metric spaces are studied.

 In chapter three, the concept of distance is abstracted to a level where it loses most of its structure. This abstraction is then examined.

 In chapter four, generalized metric spaces are examined. These are specializations of the abstract spaces of chapter three.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: A Mixed Model for Pairwise Comparisons and Its Applications

contributor:
Janicki, Ryszard
Computing and Software

abstract:
The method of Pairwise Comparisons was first described by Ramon Llull in the end of XIII century. At present, this method is identified with controversial Saaty’s Analytic

Hierarchy Process that was first proposed in 1977. The Analytic Hierarchy Process is a formal method to derive ranking orders from pairwise comparisons and it is used around the world in a wide variety of decision making, in fields such as education, industry, and government. However many researchers consider it as a flawed procedures that might produce arbitrary rankings.

In the last two decades alternative models, also based on pairwise comparisons paradigm, that appear to work better in many cases and have better theoretical fundamentals. One of them is ‘qualitative pairwise comparisons based ranking’, the other one is a quantitative pairwise comparisons ranking but based on the concept of ‘distance-based consistency’, refined and used relatively often in last decade.

In this thesis we will substantially refine ‘mixed model’, and then apply this model for several ‘real world’ cases. The ‘mixed model’ is a systematic composition of quantitative model and qualitative model. In this thesis we clarify and provide some formal foundations for scales and assignment of numerical values for qualitative factors and based on these we provide a formal process to be followed.

Seven applications in such fields as software evaluation, software quality in use, quality in use in video games, software reuse, smart grid analysis, healthcare quality and quality analysis of medical devices are provided and analysed. They show the mixed method to be useful and appreciated by users.

abstract: Thesis

abstract: Master of Computer Science (MCS)


title: The Use of High Altitude Photography As An Improved Data Source For Drainage System Analysis

contributor:
Howarth, P. J.
Geography

subject: network properties of drainage systems, environmental implications, ddata source, infrared photography, high altitude, photography, Drainage Network Data, Mapping Attributes, Mapping Techniques, Computer processingh, Drainage Density

abstract:
 Studies to date involving the network properties of drainage systems have been theoretical in nature; and the environmental implications of these network characteristics have not been exploited to the extent that would appear warranted. This situation exists due to the lack of an accurate data source. Many studies have recognized this. inadequacy of the conventional data sources to meet the necessary requirements of efficiency (in data production and handling), accuracy, consistency and uniformity.

 The present study demonstrates that high altitude, small scale colour infrared photography is capable of providing drainage network data that fulfill all these basic requirements. Data derived from the three drainage basins, mapped from a variety of data sources, demonstrate three important points. The level of detail obtained from the small scale colour infrared photography far exceeds that available from more traditional data sources. Secondly, these network data are statistica+ly consistent with the traditional data sources. Thirdly, the basin characteristics derived from the high altitude data source show a marked association with the known surficial environments and an expected variation from one surficial environment to another.

abstract: Thesis

abstract: Master of Arts (MA)


title: Accuracy of the Firebird-III Computer Code Pump Model

contributor:
Rennick, D. F.
Spinks, N. J.
Engineering Physics

subject:
FIREBIRD-III
thermalhydraulic computer code
PUMPANC
Gentilly-2 primary heat transport pumps
pump

abstract:
Part A of this thesis by K. S. Brunner is titled "Two-Phase Flow Regime Transitions Under a D.C. Electric Field" and has the following link on MacSphere: < http://hdl.handle.net/11375/16329 >
This report is Part B.

abstract: The PUMPANC subroutine in the FIREBIRD-III thermal hydraulic computer code models pump behaviour. The accuracy of this model is examined on the basis of available pump tests. Single phase test results on the Gentilly-2 primary heat transport pumps are compared to FIREBIRD-III predictions. As well, various two-phase pump tests are examined for the applicability of scaling small pump results to large pump results. Further areas of investigation are outlined.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: A Critical Study of the Substantive Textual Variants in the Three Versions of Henry James's "The Wings of the Dove" Together with a Complete Record of Substantive Variants

contributor:
Aziz, Maqbool
English

subject:
Henry James
The Wings of the Dove
substantive variants
revisions

abstract: No abstract provided.

abstract: Thesis

abstract: Master of Arts (MA)

abstract: Scope and contents: The first part of the thesis is an orientation to the novel itself, since the entire work must be taken as the only meaningful context for a consideration of the substantive variants. The second  part consists of an examination of the selected revisions in the light of the full context and of James's theory of revision. The third part  is a record of substantive variants. The appendices contain a report on computer collation of a section of the text and two extended notes on specific substantive variants.


title: Energy: A Resource Booklet for Teachers

contributor:
Johns, Martin W.
Najm, S.M.
Chemistry

subject: energy supply, demand, electricity, nuclear

abstract:
 Three chapters comprise this project. The first chapter deals with the global picture of energy supply and demand, and concludes that other sources of energy must be developed in the next fifty years.

 Chapter Two considers a number of alternate sources of energy
and examines two sources in particular: (i) Hydrogen and its dependence on electricity, and (ii) Nuclear energy used to produce electricity. Certainly, Ontario has a very viable option to produce electricity by means of nuclear energy.

 Home heating can, to some extent, be controlled by the individual, and Chapter Three discusses the operation of a heat pump and its feasibility as a heating device for homes in the Southern Ontario climate.

abstract: Thesis

abstract: Master of Science (Teaching)


title: Modelling the Formal Division of Legal Authority in Canadian Constitutionalism

contributor:
Waluchow, Wil
Philosophy

subject:
constitution
model
constitutionalism
Supreme Court
legislature
override
finality
authority
legal
Canada
Canadian
judicial
judiciary
legislative

abstract: Traditionally, systems of constitutional democracy fell into two categories: parliamentary sovereignty, characterized by the omnipotence of Parliament and the absence of any substantive limitations on its power; and judicial supremacy, characterized by the presence of restrictions on legislative power in the form of a judicially enforced, written constitution containing a bill of rights. Recently, scholars have noted that Canada’s Charter regime includes elements of both traditional systems and have proposed new ways of understanding the apparent “sharing” of legal authority between courts and legislatures in Canada. These “new models” incorporate several key features of the traditional models but purport to be distinctive, and more accurate, accounts of how legal authority is allocated. Key features of the new models include a bill of rights, judicial review of legislation, and the preservation of legislative finality over the bill of rights through an “override” mechanism. However, these new models fail to capture the division of lawmaking power that is formally entrenched in section 33 of the Canadian Charter of Rights and Freedoms. In addition, they do not provide an adequate account of how the legislative finality provided through the “override” mechanism distinguishes the new models from legislative supremacy. A proposed “hybrid” model accommodates the formal division of legal power in the Charter and raises new questions about the extent of legislative finality in Canadian constitutionalism. The hybrid model also explains Canada’s supposed lapse into de facto judicial supremacy as an indication of a nuanced and compartmentalized form of legislative supremacy.

abstract: Thesis

abstract: Master of Arts (MA)

abstract: Democratic governance was traditionally thought to require a choice between parliamentary sovereignty, with no restrictions on legislative power, and judicial supremacy, with restrictions on legislative power in the form of a judicially enforced, written constitution containing a bill of rights. Recently, scholars noting that Canada’s legal system includes elements of both traditional systems have proposed new ways of understanding the “sharing” of legal authority between courts and legislatures. These “new models” incorporate a bill of rights but allow legislatures to ignore or override these rights, thus preserving an element of parliamentary sovereignty. However, these new models fail to capture the division of lawmaking power that is formally entrenched in section 33 of the Canadian Charter of Rights and Freedoms. A new “hybrid” model accurately reflects this formal division of legal power and raises new challenges to the other new models of constitutionalism.


title: Dickens and the Victorian Attitude to Women

contributor:
Petrie, G.
English

subject: womanhood, female, Victorian, attitude, society

abstract: This thesis attempts to relate the kind of female figures in Dickens's works with the images of womanhood current in Victorian Society and Art.

abstract: Thesis

abstract: Master of Arts (MA)


title: Death's Kingdom: A Consideration of the Poetry and Poets of the Great War, 1914-1918

subject: kingdom, death, poetry, great war

abstract:
Abstract Not Provided.
Thesis
Master of Arts (MA)


title: Alfred Lord Tennyson's "The Holy Grail"

subject: holy, grail, Tennyson, Arthurian, idylls


title: 'Our society lacks consistently defined attitudes towards the black bear': The History of Black Bear Hunting and Management in Ontario, 1912-1987

contributor:
Cruikshank, Ken
History

subject:
environmental history
wildlife management
Ontario history
Canadian history
black bears

abstract: What kind of animal was a black bear? Were black bears primarily pests, pets, furbearers or game animals? Farmers, conservationists, tourists, trappers, and hunters in early twentieth-century Ontario could not agree. Even as the century progressed, ideas about bears remained twisted and there was often very little consensus about what the animal represented. These varying perceptions complicated the efforts of the provincial Department of Game and Fisheries and its successor agencies, the Department of Lands and Forests and the Ministry of Natural Resources, to develop coherent bear management policies. Perceptions about black bears often conflicted and competed with one another and at no one time did they have a single meaning in Ontario. The image of Ontario’s black bears has been continuously negotiated as human values, attitudes, and policies have changed over time. As a result, because of various and often competing perspectives, the province’s bear management program, for most of the twentieth century, was very loose and haphazard because the animal had never been uniformly defined or valued. Examining the history of these ambiguous viewpoints towards the black bear in Ontario provides us with a snapshot of how culture intersects with our natural resources and may pose challenges for management.

abstract: Dissertation

abstract: Doctor of Philosophy (PhD)