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Articles 1 - 30 of 85
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The Influence Of Eighteenth-Century British Landscape Aesthetics On Narrative And Pictorial Responses To The British North American North And West 1769-1872, I S. Maclaren
Digitized Theses
This study undertakes a consideration of a century of travel writing by Britons who explored, surveyed, traded, hunted, prospected, botanized, and established missions in the British North American North and West between 1769 and 1872. Its particular concern is how Britons employed the principles and conventions of eighteenth-century British landscape aesthetics to describe and depict northern and western terrain.;An aesthetic mode of perceiving nature, as has been argued by perceptual geographers, art historians, and literary critics, constitutes one way that a society forms it understanding of reality. For the eighteenth- and early-nineteenth-century Briton, the Sublime and the Picturesque were the …
Age-Structure And Unemployment: Some Consequences Of The Post-War Baby Boom, David Kerr Forrest
Age-Structure And Unemployment: Some Consequences Of The Post-War Baby Boom, David Kerr Forrest
Digitized Theses
The paper examines the impact of demographic changes on the rate of unemployment in Canada. The central question asked is whether the increase in the number of young people in the population during the 1970s put upward pressure on the overall unemployment-rate. It was expected to have done so because (i) a greater fraction of the labour-force would now fall within an unemployment-prone age-category, and (ii) in the absence of sufficient wage flexibility, a shift in the supply curve of a particular type of labour (defined by age) would generate unemployment in that age-group (this is the so-called cohort-crowding hypothesis). …
Food Resource Utilization By Five Species Of Benthic Feeding Fish In Passamaquoddy Bay, New Brunswick, John Stevenson Macdonald
Food Resource Utilization By Five Species Of Benthic Feeding Fish In Passamaquoddy Bay, New Brunswick, John Stevenson Macdonald
Digitized Theses
Feeding relationships of various fish species, and their relationship to the composition of the surrounding sediments, were observed for one year at two sites in the lower Bay of Fundy region. The fishes were the ocean pout (Macrozoarces americanus), winter flounder (Pseudopleuronectes americanus), plaice (Hippoglossoides platessoides), cod (Gadus morhua) and witch flounder (Glyptocephalus cynoglossus). After reducing the size of the data matrix by removing redundant variables (prey items), interspecific diet overlap and the degree to which stomach contents reflect benthic composition were assessed using discriminant functions analysis. Variables were ranked by their power to discriminate among pairwise comparisons of groups: …
Application Of Counter-Current Fluidized Cascade In Flotsam-Rich Mixtures, Edward Wing-Kee Chan
Application Of Counter-Current Fluidized Cascade In Flotsam-Rich Mixtures, Edward Wing-Kee Chan
Digitized Theses
The counter-current gas fluidized cascade is a novel pneumatic device for the separation of mixed granular solids according to density and size difference. The study presented here is restricted to the application of the cascade in flotsam-rich binary solids systems.;The purpose of this study was to investigate the effect of the density difference and size distributions of the two solids, the height and speed of the paddles, the fluidization velocity and feed and product withdrawal rates on the separation performance of the cascade. It was observed that while a significant density difference would usually result in strong segregation in the …
Theoretical And Experimental Studies In Visible Laser Spectroscopy, Akira Brian Yamashita
Theoretical And Experimental Studies In Visible Laser Spectroscopy, Akira Brian Yamashita
Digitized Theses
In this thesis, two different aspects of the interaction of radiation with molecules are studied. First, a previously-derived exact solution to the time-dependent Schroedinger equation describing the interaction between a sinusoidally-oscillating field and an N-level atomic or molecular system is used to examine the temporal and steady-state behaviour of a five-level model molecular system. Secondly, the technique of polarization labelling spectroscopy is used to study the E 0(,g)('+) state of the iodine molecule.;The behaviour of the five-level system, consisting of a ground state and four "nearly degenerate" excited states, is studied for various experimental conditions, and for single- and three-photon …
The Geochemistry And Mineralogy Of Recent Sediments Of The Niger Delta, Biodun Elijah Olorunfemi
The Geochemistry And Mineralogy Of Recent Sediments Of The Niger Delta, Biodun Elijah Olorunfemi
Digitized Theses
A study of the mineralogical and chemical composition of recent sediments of the Niger delta, Nigeria was undertaken to provide baseline geochemical data and to relate these data to soil fertility, erosion and engineering problems. The mineralogical composition shows that three areas are distinguished: (1) a large kaolinite-quartz zone; (2) restricted kaolinite-beidellite zone; and (3) a highly restricted metastable smectite zone mainly montmorillonite and nontronite. The mineralogy is interpreted as functions of stability, groundwater flow rates, permeability and sea water incursion. Type 1 occupies the dynamic central part of the delta where permeability exceeds 1 Darcy, with rainfall averaging 6.8 …
Canadian Eskimo Literature: The Development Of A Tradition, Robin Mcgrath
Canadian Eskimo Literature: The Development Of A Tradition, Robin Mcgrath
Digitized Theses
Prior to contact with European culture, Eskimos in the circumpolar world had a highly developed oral tradition. The subsequent widespread adoption of Christianity in the Arctic region resulted in nearly universal literacy among Eskimo adults, and the oral tradition almost immediately began to develop into a written one. In Canada there is now a considerable body of Inuit literature available in both Inuktitut and English, and this thesis examines how this literature developed. A brief history of European contact as it affected literacy, a consideration of the movement from the oral to written tradition, and a description of early Inuktitut …
Self-Perceptions And Smoking Behavior, Austin Thomas Deslauriers
Self-Perceptions And Smoking Behavior, Austin Thomas Deslauriers
Digitized Theses
In order to implement the purpose of this research, it was decided to try to identify a set of self-perceptual variables which distinguished people in terms of their smoking behavior. Smoking behavior was construed as manifesting itself across a continuum from nonsmoking to smoking. This was consistent with the self-orientation of the present research in which smoking is not viewed as a discrete behavior, separate from one's view of self. With the general aim of gathering as much information as possible from a previously unexplored area, a questionnaire was constructed which tapped four aspects of self-perception: general self-description (adjective ratings), …
The Relation Between Food Abundance And Reproductive Performance Of Tree Swallows, Terry Edwin Quinney
The Relation Between Food Abundance And Reproductive Performance Of Tree Swallows, Terry Edwin Quinney
Digitized Theses
Few field studies have examined experimentally the importance of food availability on adult activity and breeding performance in birds. I studied two populations of insectivorous Tree Swallows Tachycineta bicolor, 3 km apart, that differed primarily in the amount of food available to the breeding birds. I obtained an index of food abundance and conducted experiments involving the transfer of clutches and broods between populations. Tree Swallows showed substantial phenotypic plasticity in breeding characteristics and parental activities. My results demonstrated that food abundance during the the breeding season influenced clutch size, egg quality, nestling growth, behavior, survival to fledging and adult …
Superovulation And Infertility In Immature Rats, Elizabeth Anne Walton
Superovulation And Infertility In Immature Rats, Elizabeth Anne Walton
Digitized Theses
This study examined the possible causes of infertility in immature rats following superovulation (SOV) with pregnant mares' serum gonadotrophin (PMSG). The areas looked at included the timing of ovulation, oocyte normality, fertilization, oviductal transport, early embryo development and implantation.;SOV with a single injection of PMSG or continuous infusion of follicle-stimulating hormone (FSH) was compared and in some rats the period of action of PMSG was restricted to (TURN) 58 h by use of a specific antiserum (a/s). Pregnancy was observed in most FSH-infused rats whereas following SOV with PMSG pregnancy failed prior to day 5. Increased ovarian oestradiol secretion was …
Comparison Of Four Models For Predicting Person Reliability, Geziena Cynthia Fekken
Comparison Of Four Models For Predicting Person Reliability, Geziena Cynthia Fekken
Digitized Theses
The purpose of this research was to examine the efficacy of four models for predicting person reliability, which was defined as across-session item consistency. Two prediction models were based on item characteristics alone, namely, p-values and social desirability scale values. Two prediction models attempted to take into account both item and person characteristics. These models were based on individuals' latencies for responding to particular items and on individuals' thresholds for answering items in terms of some item characteristics. The latter model was derived from Jackson's (1968) threshold model for responding which describes the response process with reference to a threshold, …
Essays On Monetary Control, Timothy David Lane
Essays On Monetary Control, Timothy David Lane
Digitized Theses
This thesis is a set of essays addressing some issues related to the control of the money supply. Some issues considered are the appropriate instrument for monetary control (monetary base or interest rate), the time horizon over which this control should be effected, and the correct response to deviations of the money stock from its target path.;The first chapter is an introduction. The second chapter reviews the literature on two alternative rationales for money-supply targets which have quite different implications for the seriousness of departures of the money stock from its target.;Chapter Three deals with instrument instability: the argument that …
The Aerodynamic Loads On A Flat Plate Between Parallel Walls Due To Rotational Flow Disturbances, Hani Abdel-Razik Alnakeeb
The Aerodynamic Loads On A Flat Plate Between Parallel Walls Due To Rotational Flow Disturbances, Hani Abdel-Razik Alnakeeb
Digitized Theses
In the thesis the effects of rotational flow disturbances on a body placed in an inviscid, incompressible fluid stream and in particular the case of a flat plate situated midway between two parallel planes were studied. A single vortex approaching the flat plate was first considered and then expanded to simulate the effects of pseudo-turbulence on the flat plate.;The finite-element and finite-difference numerical methods were evaluated in the thesis and arguments were made in support of using the finite-difference approach rather than the finite-element approach. The fact that the finite-difference technique was used for the particular flow problems studied in …
The Role Of Individual Difference Factors In The Efficacy Of Covert Modeling And Self-Instructional Training For Fear Reduction, Terrance Michael Vallis
The Role Of Individual Difference Factors In The Efficacy Of Covert Modeling And Self-Instructional Training For Fear Reduction, Terrance Michael Vallis
Digitized Theses
This series of studies examined the role of selected individual difference factors in the efficacy of visual imagery (Covert Modeling) and verbal (Self-Instructional Training) coping skills procedures. Specifically, individual differences in imagery-verbal processes were examined. A variety of individual difference measures were employed in an attempt to understand whether previous inconsistent data were due to assessment issues. Also, these studies employed an 'Aptitude-Treatment Interaction' (ATI) design to evaluate the role of the individual difference variables. This design is more powerful than the typical median split procedure.;Study 1 focused on whether ATI effects could be found between Covert Modeling and Self-Instructional …
Parent Control And Joint Venture Success: The Case Of Mexico, Jean-Louis Francois Schaan
Parent Control And Joint Venture Success: The Case Of Mexico, Jean-Louis Francois Schaan
Digitized Theses
Managers in multinational companies face a strategic dilemma. They generally want to have full management control over their foreign subsidiaries, at a time when host governments, responding to social and economic forces in their own countries, are enforcing more and more arrangements which require sharing ownership and control.;By comparing successful and less successful joint ventures operating in Mexico, this dissertation attempts to provide empirical evidence on the relationship between parent control and joint venture success. More specifically, it examines how managers in parent companies ensure that their joint ventures meet their expectations.;The study focussed on ten joint ventures (five in …
Studies On The Structure And Origin Of The Parasporal Inclusion Of Sporulating Bacilli, James Peter Insell
Studies On The Structure And Origin Of The Parasporal Inclusion Of Sporulating Bacilli, James Peter Insell
Digitized Theses
The parasporal inclusions of B. thuringiensis subspecies kurstaki, subspecies israelensis, subspecies schwetzova, subspecies alesti, subspecies finitinus, and B. cereus subspecies medusa and subspecies lewinia were purified and analyzed by one-dimensional slab gel electrophoresis. The inclusion of each of the above subspecies was composed of different polypeptides. The protein composition of the inclusions was correlated with the sahpe, structure and toxicity of the inclusion. Four types of inclusions were formed by the seven subspecies studied. Three representative subspecies were chosen for further study.;Two strains of B. cereus and eight subspecies of B. thuringiensis were screened for the presence of plasmid DNA. …
Epistemic Decision And The Duhem Problem, Po Keung Ip
Epistemic Decision And The Duhem Problem, Po Keung Ip
Digitized Theses
The Duhem problem, as interpreted here, is concerned primarily with the ambiguity of scientific testing--falsifying experimental data can never uniquely determine the theoretical target to be falsified. By reformulating the Duhem problem within an epistemic decision framework recently proposed by Isaac Levi, it is hoped that the Duhem problem can be seen as a problem in epistemic decisions and hence can be solved decision-theoretically.;The motivations for adopting the decision-theoretic approach to scientific inquiry are discussed. Views of Popper, Carnap, Lakatos, Hempel and Levi are reviewed. The structures of practical decision and cognitive decision are critically compared. Epistemological concepts relating to …
Numerical Solution Of Three Instability Problems, Jacob Greydanus
Numerical Solution Of Three Instability Problems, Jacob Greydanus
Digitized Theses
This thesis obtains numerical solutions for three instability problems.;The first is a Rayleigh-Taylor interfacial instability problem. Numerical solutions are obtained using a co-ordinate transformation technique and two approaches are tested for use in solving the field equation: (a) transformation and extremization of the variational integral, and (b) transformation of the differential equation itself. The latter is also tested with the use of higher order finite difference formulae. Solutions are generated with the most suitable method and compared with the predictions of Nayfeh's non-linear perturbation theory. While there is good qualitative agreement it is found that the quantitative agreement degrades with …
Dynamics Of The Eukaryotic Cell Surface - Lectin Binding To Model Membranes, Nika Victoria Ketis
Dynamics Of The Eukaryotic Cell Surface - Lectin Binding To Model Membranes, Nika Victoria Ketis
Digitized Theses
Transmembrane glycoproteins, glycophorin and the Concanavalin A receptor, were assembled into large multilamellar liposomes. Lectin binding to these simple model membranes was positive-cooperative. The high affinity lectin binding to liposomes was influenced by the presence of unrelated macromolecules (serum albumin and Dextran T-500) at the membrane surface. Since under appropriate conditions the model membrane system appeared to accurately mimic the positive-cooperative behavior observed for binding of various lectins to intact cells, it is suggested that the source of the high affinity binding and its positive-cooperative nature in the described system is the lectin-induced, surface coat dependent 'chelate' or 'avidity' effect. …
Histamine Metabolism During Asthma Induced By Inhalation Challenge, Henry Cheuk-Ki Poon
Histamine Metabolism During Asthma Induced By Inhalation Challenge, Henry Cheuk-Ki Poon
Digitized Theses
In order to ascertain a role of histamine (HM) in the mediation of induced asthma, HM and Diamine Oxidase activity (DAO) were determined serially in plasma together with the Forced Expiratory Volume in the first second (FEV(,1)) in 18 subjects inhaling methacholine(MCH) by increments to permissible limits of 224 cumulative units (cu). HM was measured in plasma ultrafiltrates by an isotropic assay based upon the specificity of HM-N-methyltransferase harvested from rat brains. DAO was determined with o-dianisidine in plasma buffered at pH 7.4. Thirteen asthmatics were bronchial Responders. The provocative dose of MCH yielding a 20% FEV(,1) fall (PD(,20) -FEV(,1)) …
Boundary Layer Flow In Streamwise Concave Corners, Steven Ray Wilkinson
Boundary Layer Flow In Streamwise Concave Corners, Steven Ray Wilkinson
Digitized Theses
Laminar boundary-layer theory has been correctly developed for streamwise corners using singular perturbation techniques. Theoretical predictions, however, do not compare well with experimental measurements due to the observed breakdown of flow stability and similarity. Both of these properties appear as basic assumptions of the boundary-layer theory, thereby providing needed simplification as well as imposing limitations upon the mathematical model.;Any theoretical investigation of similarity breakdown would require knowledge of the similar solution not only as an initial condition, but also for insight into how to proceed. Examination of the cross-flow behavior, which affects the onset of similarity breakdown, may suggest ways …
Marital Shared Problem-Solving: Conceptualization And Assessment, Gary Wayne Austin
Marital Shared Problem-Solving: Conceptualization And Assessment, Gary Wayne Austin
Digitized Theses
Marital shared problem-solving has been considered composed of communication and problem-solving skills components. However, the definitions of these components have been confounded by both theories and previous assessment devices. This research project separated the component skills, developed a self-report measure, The Shared Problem-Solving Inventory, and investigated the interrelationship of these skills.;Using a construct approach to test construction, the problem-solving and supportive communication skills were defined, and items were written from those definitions. A novel test format attempted to simulate marital discussions. Two series of multiple-choice items were developed as separate discussions on the typical marital issues of "money" and "contact". …
Bibliographical Control In The Field Of Agriculture In Nigeria - A Study Of Demand And Availability, Georgiana Kiente Nwagha
Bibliographical Control In The Field Of Agriculture In Nigeria - A Study Of Demand And Availability, Georgiana Kiente Nwagha
Digitized Theses
A survey of eighteen Nigerian agricultural research institute libraries and the researchers using these libraries was undertaken to determine the effectiveness of the document delivery system in use. The original hypothesis--that fifty percent of demands for scientific documents made by agricultural research scientists in Nigeria are not satisfied--was found to be untenable. Survey data showed that in a majority of libraries, research scientists suppressed some of their demands. These suppressed demands frequently involved publications not stocked in the libraries. The high satisfaction ratios recorded by three quarters of the libraries did not reflect the true availability situation and was therefore …
Epistemic Complementarity And Scientific Rationality, Arunasalam Balasubramaniam
Epistemic Complementarity And Scientific Rationality, Arunasalam Balasubramaniam
Digitized Theses
Classical empiricism raised epistemological issues within a framework of dichotomies that were rarely questioned. It was assumed that statements were either normative or descriptive (and analytic or synthetic); terms were either observational or theoretical; meaning is either given atomically or holistically; truth was either radically independent of language (correspondence) or radically dependent upon it (coherence); and the entities postulated by scientific theories are constructed (instrumentalism) or are theory-independent (metaphysical realism). Modern philosophers have questioned the tenability of these distinctions and attempts have been made to relinquish many of them.;I argue that, instead of discarding them, we have to recognize these …
Hypothalamic And Peripheral Noradrenergic Responses To Changes In Baroreceptor Input In Conscious Rats With And Without Renal Nerves, Kaushik Parbhubhai Patel
Hypothalamic And Peripheral Noradrenergic Responses To Changes In Baroreceptor Input In Conscious Rats With And Without Renal Nerves, Kaushik Parbhubhai Patel
Digitized Theses
Hypothalamic and peripheral noradrenergic systems have been implicated in baroreflex control of arteria pressure. However, the relationship between changes in the hypothalamic noradrenergic activity and changes in peripheral sympathetic activity is unclear. The first study examined this relationship in conscious Wistar rats following changes in baroreceptor input to the CNS produced by: (1) transection of aortic depressor nerve (ADN) (removal of specific baroreceptor input), (2) acute hypotension for 60 min produced by infusion of nitroprusside, and (3) acute hypertension for 60 min produced by infusion of phenylephrine. An index of norepinephrine (NE) turnover was used to assess the noradrenergic activity …
Theoretical Properties Of Multinomial Logistic Regression, Shelley Brenda Bull
Theoretical Properties Of Multinomial Logistic Regression, Shelley Brenda Bull
Digitized Theses
A large sample relative efficiency of estimation for multinomial logistic regression compared to multiple group discriminant analysis has been derived and evaluated for parameter values relevant to epidemiological research. The large sample distributions of the two procedures are based on the assumptions of multivariate normality and common covariance structure among groups. Matrix calculus methods were found to be valuable in obtaining concise expressions for the large sample variances.;Relative efficiency does not decrease as the number of response categories increases, although increases tend to be small. The number of explanatory variables and the magnitude of the odds ratios associated with them …
An X-Ray Scattering And Raman Spectroscopy Study Of Iron(3+), Gallium(3+) And Germanium(4+) Substituted Aluminosilicate Glasses, Grant Stephen Henderson
An X-Ray Scattering And Raman Spectroscopy Study Of Iron(3+), Gallium(3+) And Germanium(4+) Substituted Aluminosilicate Glasses, Grant Stephen Henderson
Digitized Theses
SiO(,2), KFeSi(,3)O(,8) and NaFeSi(,3)O(,8) glass structures were investigated using X-ray radial distribution function (RDF) and quasi-crystalline modelling. Vitreous SiO(,2) exhibits a mean Si-O bond distance of 1.60 (ANGSTROM) and Si ('O) Si angle of 151(DEGREES), similar to previous studies. Modelling of the structure against various SiO(,2) polymorphs suggest that vitreous SiO(,2) (v-SiO(,2)) can best be described as a tridymite-like network consisting of six-membered rings of SiO(,4) tetrahedra of which 2/3 are tridymite-like and 1/3 cristobalite-like.;The structures of KFeSi(,3)O(,8) and NaFeSi(,3)O(,8) glasses both have apparent T-O distances of 1.70 (ANGSTROM) but differ in T-T distances and T ('O) T angles; which …
Influence Of Some Domestic Environmental Factors On The Prevalence Of Respiratory Symptoms And Lung Function Changes In Residents Of Three North American Townships, Hidyat Roland Hosein
Influence Of Some Domestic Environmental Factors On The Prevalence Of Respiratory Symptoms And Lung Function Changes In Residents Of Three North American Townships, Hidyat Roland Hosein
Digitized Theses
All residents, aged 7 years and above, of three towns were canvassed to participate in a study to determine whether domestic air pollution factors were important in explaining respiratory diseases. Of the 7,203 who participated, this study covers only the 4,074 who were non-smokers. A standardized questionnaire was administered which determined the frequency of cough, phlegm, wheeze, dyspnea, and also domestic factors such as exposure to domestic pets, exposure to gases, vapours and dusts from hobbies, exposure to emissions from gas stoves, the use of fireplaces, air conditioners, humidifiers and heating systems, domestic crowding, and the number of smokers in …
The Boundary Definition Problem: Statistical And Geometric Approaches, Richard Averack
The Boundary Definition Problem: Statistical And Geometric Approaches, Richard Averack
Digitized Theses
The boundary definition problem involves the selection of appropriate criteria and methods for portraying boundaries of geographical distributions. Although this is a very important consideration in many academic fields, particularly geography, biology and sociology, apparently very little attention has been devoted to it in the literature. Boundaries are, as a rule, rather carelessly and subjectively drawn.;Various approaches to bounding discrete point distributions are explored in this thesis. These approaches fall into two categories based on the amount of information available about the distribution. In some caes, only locations are known and a boundary must be defined based soley on the …
Keats And The "Service Of The Time Being", Joanne Lorna Buckley
Keats And The "Service Of The Time Being", Joanne Lorna Buckley
Digitized Theses
This dissertation is an exploration of Keats's poems and letters with an eye to discovering his attitude toward the viability of poetry in a post-Lockean universe. Keats's concern with the subjective limitations of imagination in the face of scientific advancement in his time and its effects on his poetry are thus its subject.;The Echo and Narcissus myth, as it relates to the reflexive imagery in Keats's work, is used as a paradigm of the Lockean split between reflection and sensation and its relation to the poetic process. Certain motifs related to Keats's reflexive imagery are then examined, including the motifs …