identifier: Abdel-Rahim, Naser M. B. <https://research.library.mun.ca/view/creator_az/Abdel-Rahim=3ANaser_M=2E_B=2E=3A=3A.html>   (1995) A current-regulated voltage-controlled scheme for DC to AC voltage-source static power supplies.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: This thesis presents a cost-effective control strategy for fixed-switching frequency variable duty-cycle control of static voltage-source inverters with output filter for uninterruptible power supplies (UPS) and utility interactive systems (UIS). The proposed control scheme is based on sensing the current in the capacitor of the load filter and using it in an inner feedback loop. An outer capacitor voltage feedback loop is also incorporated to ensure well-regulated sinusoidal load voltage in UPS applications, and indirect regulation of the utility line current in UIS applications. -- The performance of the proposed control scheme is examined for voltage-source inverters with output filter. A general model of the power circuit which includes the inverter and a second-order load filter, and the load is established for each application. These models are discontinuous because of the switching nature of the power inverter, but they are employed to obtain computer simulation results of various waveforms in the inverter system. -- In order to examine the steady-state and dynamic behaviour of each system, analytical models are derived from the general model. Employing Fourier series analysis, a time-continuous model is derived from the system discontinuous model. For the three-phase systems, time-invariant models are obtained by transforming the time-continuous models to the rotating frame of reference using the forward-backward transformation for UPS and O-q-d transformation for the UIS. Perturbation and small-signal approximations are applied to the time-invariant models to obtain steady-state and linearized small-signal models which are used to examine the steady-state and dynamic performance of the systems. -- Using the root-locus analysis technique and pole-zero maps, the incremental dynamics of the power circuit state variables are investigated. In particular, the transfer functions of the incremental dynamics of the power circuit state variables due to incremental changes in the control signal are examined. The results of the investigation are used to select appropriate feedback variables in the control circuit such that a stable and successful operation of the feedback control scheme is achieved. -- It is shown that choosing either the inverter output or capacitor current as the feedback variable in the system produces stable operation. Selection of the inverter output current as the feedback variable is overruled due to possible harmonic instability in the load circuit or the need for an extra load current sensor. Consequently, the capacitor current is chosen as the feedback variable. To ensure sinusoidal load voltage which faithfully tracks its reference signal, an outer feedback voltage loop is incorporated. The resultant control strategy applicable to the UPS and UIS is a current-regulated voltage-controlled scheme involving an inner feedback loop with the capacitor current and an outer loop with the capacitor voltage. -- Selection of the controllers of the feedback loops is carried out using Bode diagram and time-domain error analysis. It is shown that proportional controllers in the feed-forward path of both the inner and outer feedback loops are sufficient to produce a system with excellent dynamic performance, and well-regulated and nearly perfect sinusoidal load voltage or utility line current. As a result, the proposed control scheme is simple to implement. Experimental verification of the proposed scheme for single-phase and three-phase UPS, and single-phase UIS is presented in the thesis to demonstrate the feasibility of the proposed control strategy, and the validity of the analytical models.


identifier: Abedin, Zainul <https://research.library.mun.ca/view/creator_az/Abedin=3AZainul=3A=3A.html>   (1978) Decision model for a construction contractor to develop or buy a cost control software.  Masters thesis, Memorial University of Newfoundland.

type: Thesis NonPeerReviewed

abstract: Construction contractors are increasingly using computer data processing on their projects. The practice of purchasing or leasing software and the alternative of in-house development of suitable software exists concurrently among construction contractors. Adequate attention is not given to the selection of the most beneficial mode for acquiring software. This project develops a systematic decision approach to select the mode of software acquisition. -- This systematic decision approach delineates the controllable variables and the states of nature. Relative weightage is assigned to the variables, and importance rating is assigned to the states of nature. From the outcomes of the interactions between controllable variables and the states of nature, the expected value of each alternative is determined, and the one with maximum expected value is selected. This gives the most economical acquisition mode of software required by a construction contractor.  -- The decision process can be ·used either as a rigorous methodology or to improve the quality of intuitive decisions by ensuring that all the variables are given due consideration.


identifier: Abu-Labdeh, Abdel-Rahman Mustafa <https://research.library.mun.ca/view/creator_az/Abu-Labdeh=3AAbdel-Rahman_Mustafa=3A=3A.html>   (2004) Monte Carlo simulations for classical two-dimensional dipolar antiferromagnetic systems on a square lattice.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: In this research, the phase behavior of a lattice-based model for a classical two dimensional dipolar antiferromagnet on a square lattice is determined using Monte Carlo simulations. Four different systems are investigated, with the magnetic phase diagram for each system being established for both zero and finite temperature. The results are compared to earlier theoretical and experimental results on low dimensional magnetic systems. -- The first model is the Heisenberg system in which the three-dimensional classical spins interact through both nearest-neighbor antiferromagnetic exchange and long-range dipolar interactions. The magnetic phase diagram for this system was determined as a function of both T/g and |J|/g, where T is the temperature in units of 1/κβ such that κβ is the Boltzmann constant, J is the strength of the antiferromagnetic exchange interaction, and g is the strength of the dipolar interaction. At low temperatures, this phase diagram shows a dipolar planar antiferromagnetic phase for low values of |J|/g, and a simple perpendicular antiferromagnetic phase for large values of |J|/g. The reorientation transition value of the exchange interaction, J r (T), on the phase boundary separating these two ordered phases, shows only a weak dependence on temperature. The data also indicate that the dipolar planar antiferromagnetic phase separates into two distinct phases in which the orientation of the spins depends on the value of the |J|/g. -- The second model is the plane rotator system in which the two-dimensional classical spin rotors are confined to the plane of the system and interact through both nearest-neighbor antiferromagnetic exchange and long-range dipolar interactions. The phase diagram of this system was constructed as a function of both T/g and |J|/g.  The results for the plane rotator system are compared to the results obtained for the Heisenberg system. This comparison clarifies the role played by the out-of-plane degree of freedom of spins in determining the structure of the dipolar planar antiferromagnetic phase. -- The third model is the anisotropic Heisenberg system with fixed κ (where κ is the strength of the planar magnetic surface anisotropy). In this system, the three dimensional classical spins interact through nearest-neighbor antiferromagnetic exchange and long-range dipolar interactions, as well as by a weak planar magnetic surface anisotropy (i.e., κ = — 1.0g). Again, the magnetic phase diagram for this system was determined as a function of both T/g and |J|/g. This phase diagram shows similar behavior to that of the Heisenberg system, except that there exists a range of |J|/g in which the system exhibits a reorientation transition from the dipolar planar antiferromagnetic phase to the simple perpendicular antiferromagnetic phase with increasing temperature. -- Finally, the fourth model is the anisotropic Heisenberg system with fixed J. In this system, the three-dimensional classical spins interact through a short-range antiferromagnetic exchange interaction, a planar magnetic surface anisotropy and a long-range dipolar interaction. The simulations focus on the exchange-dominated regime in which the strength of the exchange interaction is significantly greater than both the dipolar interaction and the magnetic surface anisotropy. The magnetic phase diagram for this system was then established as a function of both T/g and |κ|/g, for a fixed value of the exchange constant (i.e., J = —10.0g). This phase diagram shows that there exists a range of the |κ|/g in which the system exhibits a reorientation transition from the simple planar antiferromagnetic phase to the simple perpendicular antiferromagnetic phase with increasing temperature. Finally, some implications of these findings are presented.


identifier: Abouhussien, Ahmed Abdallah <https://research.library.mun.ca/view/creator_az/Abouhussien=3AAhmed_Abdallah=3A=3A.html>   (2013) Durability and reinforcing steel corrosion of high performance self-consolidating concrete.  Masters thesis, Memorial University of Newfoundland.

abstract: This study investigated the strength and durability of high performance self-consolidating concrete (HPSCC) incorporating metakaolin. The statistical design of experiments was utilized to study the effects of mixture proportions and curing conditions on the performance of HPSCC.  A total of 9 mortar, 26 concrete mixtures, and 80 prism samples were tested. The first stage compared the strength and durability of mortars containing metakaolin to other supplementary cementitious materials (SCM’s). The second stage tested 20 HPSCC mixtures to optimize the fresh, hardened, and durability properties, and the service life time of the HPSCC mixtures. The optimum HPSCC mixture with metakaolin was then compared to an additional three HPSCC mixtures containing different SCM’s and to two normal concrete (NC) mixtures. Finally, the third stage involved testing 80 prism samples using an accelerated corrosion test method under ten alternative curing techniques. The results of this investigation yielded an optimum HPSCC mixture with a total binder of 490 kg/m³, a water-to-binder ratio of 9.39, and a 19.9% replacement proved to be the most significant variable affecting the chloride permeability, decline of permeability over time, ad the service life time of the structure.


identifier: Aboul-Azm, Azmy Fouad <https://research.library.mun.ca/view/creator_az/Aboul-Azm=3AAzmy_Fouad=3A=3A.html>   (1982) Drift of icebergs affected by wave action.  Masters thesis, Memorial University of Newfoundland.

abstract: The wave drift force acting on freely floating icebergs has been analysed. This wave drift force was included together with other environmental forces acting on an iceberg for drift modelling to predict its drift patterns. -- The wave drift force was calculated using the wave diffraction theory and the singularity distribution method. By distributing singularities over the underwater surface of the iceberg, the velocity potential due to wave diffraction was computed using the Green's function method, and then added to the incoming wave velocity potential to form the total velocity potential. It was assumed that the potential due to the oscillatory motion of an iceberg was negligible. The wave drift force was derived by taking the time average of the second-order wave forces on the iceberg. -- The computed wave drift force was then added to other environmental forces acting on the iceberg to form the differential equations of motion for translation in a horizontal plane. The iceberg trajectory can be found by solving the equations of motion numerically with the time step integration technique. -- This study has shown that the wave drift force acting on an iceberg is significant and has the same order of magnitude as other environmental forces. Including the wave drift force in the drift model has improved the accuracy of predicted paths of icebergs. This was verified by comparing the observed and predicted trajectories of two icebergs with and without the wave drift effect.


identifier: Abtahi, Alireza <https://research.library.mun.ca/view/creator_az/Abtahi=3AAlireza=3A=3A.html>   (2011) Bit wear analysis and optimization for vibration assisted rotary drilling (VARD) using impregnated diamond bits.  Masters thesis, Memorial University of Newfoundland.

abstract: The effect of vibrations on bit wear and the rate of penetration in rotary drilling was investigated. A laboratory scale drilling rig was used for experiments with capability of controlling important drilling factors such as WOB (Weight On Bit), flow rate, RPM, and vibration. Vibration under different amplitudes was studied using impregnated diamond coring bits. The main goal of this study is to find the optimum drilling conditions considering both ROP (Rate Of Penetration) and wear including the effect of vibration. -- Bit profile shape was found to be another important factor affecting ROP and bit wear. In all experiments, three main profile shapes appeared after some drilling in the sequence of: V-grooved, flat end, and rounded edge. The highest ROP results were obtained with V-grooved, decreasing in the order: unused, flat end, and rounded edge. Vibration had more effect on bit wear than profile shape. Profile shapes with sharper edges wore away rapidly -- Wear and bit profile changes should be taken into account in a study to relate ROP to WOE. Otherwise, the relationship observed between these variables may not be correct.


identifier: Tobin, Sean W. <https://research.library.mun.ca/view/creator_az/Tobin=3ASean_W=2E=3A=3A.html>   (2005) Social work and child protection: Is anti-oppressive social work practice relevant and applied in child protection work?  Masters thesis, Memorial University of Newfoundland.

abstract: The social work profession has a responsibility to promote social justice and can be understood as anti-oppressive in approach. The Code of Ethics reflects certain values and principles that are integral to anti-oppressive practice. These values and principles include social justice and advocacy, which are generally not embraced within government bureaucracies (Barter, 2000; Herbert & Mould, 1992). How can social workers abide by their Code of Ethics if they are under the direction of a provincial organization that does not embrace these values and principles? -- Two focus groups were conducted with front-line child protection social workers to explore this question. Findings from the study indicate that while social work participants do recognize that the child welfare system is oppressive, they still attempt to work from an anti-oppressive framework. Participants were quick to defend their compliance with their professional Code of Ethics. The role of social work within child protection as well as changes needed to ensure the system is less oppressive to workers and clients is discussed.


identifier: Tollefsen, Cristina Dawn Spanu <https://research.library.mun.ca/view/creator_az/Tollefsen=3ACristina_Dawn_Spanu=3A=3A.html>   (2005) Evaluation of a Doppler sonar system for measurements of fish swimming velocity.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Good measurements of fish swimming velocity would add another piece of valuable scientific information to the toolkit of the fisheries acoustician; however, previous investigations of Doppler sonar measurements of fish velocity have been relatively sparse, and no previous study has explored the possibilities available with newer coherent Doppler sonar systems. Comprehensive field and laboratory studies were undertaken to characterize the performance of a 250-kHz, 10-kHz bandwidth coherent Doppler sonar when applied to measurements of fish swimming velocity. A computer model was designed to assist in understanding experimental results and broaden the range of parameters investigated. The quality of velocity estimates was quantified by calculating the error and the standard deviation for estimates of Doppler velocity for individual targets. The effect of sonar parameters (pulse length, pulse coding, lag, ping rate, bandwidth) and environmental conditions (target and water velocity, target spacing, signal-to-noise ratio) on the quality of velocity estimates was examined through four experiments with simulated fish targets, three experiments with live fish targets, and the computer model. With signal-to-noise ratio ranging from 0 dB to 75 dB, typical velocity errors of 1--2 cm s -1 and standard deviations of 5--13 cm s-1 were realized with the test instrument, amounting to 4--11% uncertainty if a fish swimming velocity of 30 cm s-1 is assumed. Experimental, theoretical, and model results taken together suggest that useful estimates of fish swimming velocity could be obtained using a coherent Doppler sonar with the following specifications: a transmit frequency of 200--300 kHz with a 16% bandwidth, a beamwidth of 4--6°, and several beams to measure multiple components of fish velocity.


identifier: Toman, Helena Cecilia <https://research.library.mun.ca/view/creator_az/Toman=3AHelena_Cecilia=3A=3A.html>   (2012) Geology and metallogeny of north-central Newfoundland and the Little Deer VMS deposit: an introduction and overview.  Masters thesis, Memorial University of Newfoundland.

abstract: The Little Deer deposit, Springdale Peninsula, north-central Newfoundland, is a Cyprus-type volcanogenic massive sulfide (VMS) deposit hosted by mafic volcanic rocks of the ophiolitic Late Cambrian (~505 Ma) Lushs Bight Group. The deposit has been a past-producer (Cu) and is currently the focus of extensive exploration, thereby providing a new opportunity to study the Little Deer deposit and to obtain a better understanding of ophiolite-hosted VMS mineralization in the northern Appalachians. -- The Little Deer deposit consists of a  stockwork that is composed primarily of disseminated and stringer-style mineralization with occasional semi-massive to massive sulfide horizons. Mineralization is dominated by chalcopyrite, pyrrhotite and pyrite with minor sphalerite and cobaltite. Native tellurium, bismuth/mercury/silver/nickel and lead tellurides, electrum , galena, selenium-bearing galena, and native arsenic are present as trace phases. The dominance of chalcopyritepyrrhotite-(±pyrite) mineralization throughout the deposit suggests that Little Deer formed from low pH (~2-4), low oxygen fugacity(~ -40 to -45), and high temperature (>300°C) fluids, typical of a mature VMS system. -- The low abundance of trace phases at Little Deer and their textural association to the main sulfide components (which are void of enrichment in these trace phases), suggests that trace phases formed via annealing ("sweating") out of the main sulfides during post-VMS deformation and greenschist metamorphism. -- On a global scale, the mineralogy, mineral assemblages and mineralization styles at Little Deer are similar to the massive sulfide deposits of Cyprus; the Italian Apennine deposits; and the Norwegian Caledonides. On a regional scale, i.e., in Newfoundland, Little Deer mineralization is similar to ophiolitic VMS deposits at Betts Cove, Tilt Cove, Colchester, Little Bay and Whalesback. -- In situ sulfur isotope signatures for sulfide minerals  at Little Deer range from δ³⁴S = -5.6⁰/₀₀ to +1 5.2⁰/₀₀, with values for chalcopyrite ranging from 0.6⁰/₀₀ to 10.5⁰/₀₀ (average: 3.8⁰/₀₀); pyrrhotite from -0.3⁰/₀₀  to +6.0⁰/₀₀  (average: 3.5⁰/₀₀); and pyrite from -5.6⁰/₀₀  to +15.2⁰/₀₀  (average: 4.3⁰/₀₀). A comparison between measured δ³⁴S-values and calculated δ³⁴S-values for thermochemical sulfate reduction of Late Cambrian seawater sulfate, suggests that Little Deer sulfur was primarily derived via thermochemical sulfate reduction, with or without an input of leached igneous sulfur from the surrounding basaltic/ultramafic rocks. Overall , the δ³⁴S-values obtained for Little Deer are within ranges documented for Late Cambrian VMS deposits globally; this suggests that thermochemical sulfate reduction was an important global mechanism for the formation of reduced sulfur in Late Cambrian VMS deposits.


identifier: Tomasic, Miranda Mirosevic <https://research.library.mun.ca/view/creator_az/Tomasic=3AMiranda_Mirosevic=3A=3A.html>   (2005) A prospective study of prevalence and risk factors related to postpartum depression.  Masters thesis, Memorial University of Newfoundland.

abstract: Postpartum depression (PPD) is a serious medical condition affecting many women after childbirth. Depressed mood and difficulty coping, particularly with the infant, characterize postpartum depression (Robinson, Steward, 1986). Clinical features include a pervasive state of apathy, despair, extreme fatigue, loss of appetite, insomnia, and crying spells. Postpartum depression is frequently undiagnosed. The etiology is unclear but there seems to be complex interaction between biological, psychological and social factors. The duration of the depression is unknown, since few studies have been conducted for longer than eight weeks postpartum (Jermain, 1995). For a significant percentage of women, depressive symptoms may continue for months or years after giving birth (Goodman, 2004). -- The objectives of this study were: (1) to determine the natural history of postpartum depression in the sample, including onset and duration; (2) to report the point prevalence rate for postpartum depression in the sample at one month, the period prevalence rate within three months postpartum and the incidence rate for postpartum depression at three months; (3) to examine the association between selected risk factors and the development of postpartum depression, including history of previous depression, family history of depression, inadequate social support, life stress, childcare stress, maternity blues, marital dissatisfaction, and antenatal anxiety; (4) to comment on the treatment practices currently used in dealing with postpartum depression ; and (5) to comment on the rate and time of ‘onset of dropout’ for mothers who chose not to participate in the study. -- This prospective prevalence study involved mothers who delivered children in St. John's Newfoundland during the period from the 4th of May 1999 to the 3rd of June 1999, inclusive. The convenient heterogeneous sample consisted of 71 mothers ranging from 19-40 years of age. An interview-based questionnaire was administered while each mother was a patient on the postnatal ward. Self-complete questionnaires, were mailed to the mothers at home, at one month and three months after delivery. -- The point prevalence of postpartum depression in the sample was 3.07% at one month and 3.2 % at three months, the period prevalence rate at three months after delivery was 4.8% and the incidence rate at three months after delivery was 1.6%. -- Prevalence of depression, risk factors and drop out rates were compared with previous studies in postpartum depression. In general, prevalence of postpartum depression in this study is in the lower range, comparing to prevalence reported in the other studies. However, risk factors identified in this study for mothers developing depression are comparable with those previously reported. -- The return rate for mailed questionnaires in this sample was 87.3%. As a result, recommendations for the conduct of a full prospective study were developed.


identifier: Tompkins, Amy Jo <https://research.library.mun.ca/view/creator_az/Tompkins=3AAmy_Jo=3A=3A.html>   (2001) "Investigating civilisation" : the city as frontier in the early Prairie novels of Isabel Paterson.  Masters thesis, Memorial University of Newfoundland.

abstract: This thesis examines two early prairie novels by Isabel Paterson, The Shadow Riders (1916) and The Magpie's Nest (1917). Isabel Paterson is an early Canadian writer whose work has been lost due to critical neglect: her work deserves to be recovered and given its rightful place in the canon of Canadian literature. Chapter One provides a critical survey and evaluation of prairie regionalism. This criticism is the critical background for the thesis. The following two chapters focus on The Shadow Riders and The Magpie's Nest and how they fit into the existing ideas of what it means for a text to be classified as prairie literature. Instead of being preoccupied with the pioneering experience and the prairie landscape, as established criticism holds that prairie novels do, Paterson's novels have urban settings and her characters experience the city as a frontier.


identifier: Toner, Paul <https://research.library.mun.ca/view/creator_az/Toner=3APaul=3A=3A.html>   (1998) Reform within : a study of satire as inquiry in the plays of Sir George Etherege.  Masters thesis, Memorial University of Newfoundland.

abstract:
The strength of the satire of Sir George Etherege lies in the introduction of a complex dramatic realism. In The Man of Mode one encounters the Restoration world, not heroic ideals: taverns and places known by name to the audience, and especially characters with a recognizable smell and sound. In adhering to this level of realism, the play resists conclusion, instead resolving to reflect the complexities of life in an uncertain future. It is a realism that serves the ends of a particular kind of satire: the satire as inquiry. Etherege's earlier works gave birth to his dramatic realism but thwarted it in artificial plot resolutions that denied the full exploration of the characters. -- In the first chapter of this thesis the traditional definitions of satire are explored, for in exclusively valuing certain rigid and narrow elements, these definitions have failed to include the dramatic works of Etherege. The basis for understanding the satire of Etherege, which is seen here as akin to the satire of Horace, is formed from the criticism of Dustin Griffin. The paucity of commentary on Etherege's plays as satirical pieces necessitates the frequent use of indirect sources. Standing on the shoulders of theorists from the 1960s who broke away from the majority, Griffin describes a satire he labels "satire as inquiry." In satire as inquiry, the absence of a fixed norm or standard against which the satiric thesis plays allows an exploration of a value or vice to go ahead without a predetermined end. This thesis proposes an expanded understanding of such satire, dependent on inversion, identification and moral attachment. -- In chapter two The Man of Mode, Etherege's best known play, is studied within the context of satire as inquiry. Etherege is seen to engage the reader through the
borrowing of familiar forms and the introduction of a powerful dramatic realism. The reader's false understandings are blasted, his expectations disrupted, and his position in the text displaced. Left without a satiric antithesis, the reader is encouraged to look inside himself, and this self-examination leads to what this thesis will term "reform within." The greatest inversion is seen in the coupling of Dorimant and Mrs. Loveit as positive and negative characters respectively. The reader's values are targeted. The satiric intent is blurred by the absence of a narrative voice, by the multiple characters, and by Etherege's masterful use of "play and display." The aims of the satire as inquiry are completely realized when The Man of Mode reaches play's end without a conventional conclusion. An examination of Etherege's own life lends support to the claims of identification and moral attachment made in this chapter. While the emphasis is placed on the reader's response to the text, evidence is also brought forward to establish the Restoration theatregoer's response to the play. -- In the third chapter, the beginnings of Etherege's dramatic realism and penchant for inconclusiveness are traced back to his poems and his first two plays. In these earlier works we confront some problems: we find that the real nature of certain characters is sacrificed for contrived endings, the threat of female dominance is artificially thwarted to preserve male power, and Etherege's literary grace is shown to be underdeveloped because of the substitution of physical and farcical comedy for polished dialogue.


identifier: Tran, Huu-Anh <https://research.library.mun.ca/view/creator_az/Tran=3AHuu-Anh=3A=3A.html>   (2006) Synthesis and complexation properties of naphthalene ring-based receptors.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: The work described in this thesis deals mainly with the synthesis of new molecular receptors containing naphthalene-ring units ("calixnaphthalenes"), and their solution complexation properties with neutral guests such as fullerene (C60 and C70 ) and/or cationic guests, e.g. tetramethylammonium chloride and/or several metal ions (alkali metal and silver ions). -- In order to develop practical methodology for the solution complexation studies using 1 H NMR spectroscopy, thiocorannulene derivatives synthesized by the L.T. Scott group were employed as model hosts with fullerenes (C60 and C70 ) in CS2 . The results of this work are described in Chapter 2. The study revealed that pentakis(1,4-benzodithiino)corannulene (53 ) formed the strongest 1:1 complexes of any corannulene derivative with C60 and C70 reported to date. -- In Chapter 3, the syntheses of calix[4]naphthalenes and the attempted modification of the narrow-rim of tert -butylcalix[4]naphthalene 18 via alkylation, or via the Sonogashira coupling reaction are reported. In addition, a recent reinvestigation of the complexation properties of calix[4]naphthalenes such as 17 and 18 with C60 and C 70 in toluene (toluene-d8 ) and CS2 was conducted using 1 H NMR and/or UV-vis absorption spectroscopy. Under the conditions studied, only 18 was revealed to be a good host for C60 and also for C70 in toluene- d8. -- In Chapter 4 the syntheses of ethoxycarbonylmethoxy ethers ("hexaester" 123 and "octaester" 124 ) of homocalix[n ]naphthalenes are described. These new compounds were employed as alkali ionic receptors using a two-phase extraction (CHCl3 -H2 O) system and compound 123 was shown to be a highly selective receptor for potassium ion under the conditions studied. -- The work described in the remaining Chapters concerns the synthesis and/or complexation properties of the homohetero-bridged calixnaphthalenes, including homooaxa-159a-d , 160a and 160d , homothia- 205-208 , and homoaza analogues 264a-d . While octahomotetraoxacalix[4]naphthalenes 159a and 159b were shown to be good hosts for TMACl in CDCl3 with 1:1 binding ratio, no complexes were observed to be formed between these new homothia receptors with TMACl. In contrast, the transition-metal ion Ag+ , formed 1:1 host-guest complexes with octahomotetrathiaisocalix[4]naphthalenes 205a and 205b .


identifier: Trant, Andrew J. <https://research.library.mun.ca/view/creator_az/Trant=3AAndrew_J=2E=3A=3A.html>   (2013) Changing treelines : how variability in scale and approach improve our understanding.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: With treeline position expected to expand northward, and upward, with climate change, there is increased attention towards understanding the mechanisms that control these patterns. Using a regional and broad scale approach, treeline dynamics, disturbance and response to recent climate warming were explored along an altitudinal gradient in the Mealy Mountains, Labrador (Canada), and across the circumpolar subarctic. To complement the western science approach to understanding climate change, a critique of modules taught to the Innu Guardians will be presented. At a regional scale in the Mealy Mountains, treeline dynamics over the past few centuries showed species-specific differences in when treeline was established and the relative rates of subsequent infilling and mortality. All tree species showed increased variability in recruitment correlations to climate across the treeline ecotone with black spruce (Picea mariana) showing consistently positive correlations, while larch (Larix laricina) shifted from strongly positive to negative and white spruce (Picea glauca) showing consistently negative correlations. Long-lived black spruce krummholz also showed significant recent increases in radial growth. Disturbance at treeline resulted in characteristic gap dynamics with low-levels of tree mortality attributed to porcupine (Erethizon dorsatum) herbivory and small-scale outbreaks of spruce budworm (Choristoneura fumiferana) and larch sawfly (Pristiphora erichsonii). These outbreaks occurred at lower magnitudes than observed in other parts of the boreal forest due to decreased tree density, supporting the Resource Concentration Hypothesis. Canopy gaps associated with windthrow did not have significantly different canopy structures but seedling densities of larch and black spruce, were significantly higher in exposed soil associated with windthrow disturbance. At broader spatial scales across circumpolar treeline, growth form and advancement were not significantly related to the extent of site warming but rather treeline advancement was predicted by diffuse, or 'gradual' treelines and closeness to the ocean. At the regional scale, it was expected that larch and black spruce would capitalize on warming temperatures, since these species are already exhibiting early signs of response. The frequency and magnitude of insect outbreaks is expected to increase with climate change and these data suggest that larch, and to a lesser extent, black spruce, will have enhanced regeneration dynamics. At broad spatial scales, ecological factors will continue to be significant drivers of treeline change until temperatures warm past a point where regeneration limitations, such as seed viability and establishment, are removed. Teaching and communicating climate change science illustrated the best results when taught in field conditions, while some difficulties were encountered in differentiating between short-term versus long-term change. Working with the Innu Environmental Guardians to develop a framework for detecting change in northern forests, helped to contextualize the western science approach to treeline research.


identifier: Tranter, David <https://research.library.mun.ca/view/creator_az/Tranter=3ADavid=3A=3A.html>   (2005) Different than dad: a phenomenological exploration of masculine gender role strain.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: The purpose of the study is to explore the ways in which men raised during the latter half of the 20th century have experienced and negotiated tensions and conflicts in masculine gender role expectations. In order to capture the complex and dynamic nature of role strain, the research design follows a qualitative phenomenological methodology. Eight men were selected, all of whom were born approximately in the middle of the 20th century. The men varied in terms of age, education, background, and family situation. Each participant was interviewed at length using a semi-structured interview process that included a wide range of topics beginning in childhood and across the life span. The interviews were then transcribed and analyzed according to the presence of dominant themes. The results of the interviews were compared and contrasted with the existing literature on masculinity and Gender Role Strain. -- All of the men experienced multiple pressures to change coming from various sources. Given these many pressures, undertaking change was complex and uncertain in which the men felt little sense of direction. The Gender Role Strain Paradigm and its various strain types did not fit the experience of the men well. While some of their experiences are reflected by the construct, the paradigm provides too superficial and simplistic a framework for fully capturing the complexity of their situation. The men's experience suggests that, for them at least, the pursuit of a singular, fixed and independent masculinity may not only be unrealistic, but may be a poor adaptation to the demands of contemporary society. In order to better reflect the complexity of experience expressed by the men, what seems required is a view of masculinity that does not seek resolution or reconciliation but rather allows for contradiction and conflict. In this way masculinity is not a crisis to be resolved, but rather a complex and dynamic ongoing phenomenon that can take many forms.


identifier: Treberg, Jason R. <https://research.library.mun.ca/view/creator_az/Treberg=3AJason_R=2E=3A=3A.html>   (2006) The accumulation and metabolism of methylamine organic osmolytes in elasmobranch fishes.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: It is widely accepted that marine elasmobranch fishes accumulate the methylamine compounds trimethylamine oxide (TMAO), glycine-betaine (betaine) and sarcosine as osmolytes. The metabolism and accumulation of these compounds has received relatively little study in elasmobranchs, and as such the purpose of this thesis was to investigate aspects of methylamine metabolism, retention and accumulation. Experimental approaches range from multispecies comparisons to directed study of a single species (the winter skate, Leucoraja ocellata ) at different levels of organization from the whole animal down to subcellular components. -- Marine elasmobranchs and a euryhaline species in freshwater accumulate methylamines as the predominant intracellular non-urea organic osmolytes in muscle, whereas, freshwater species preferentially accumulated the β-amino acid taurine. All elasmobranch species examined in this thesis had measurable enzymatic capacity for betaine synthesis in the liver and strong correlation between hepatic betaine synthesizing enzymes and muscle betaine content was found. Only one species of the seven examined had measurable TMAO synthetic capacity and a phylogenetic explanation is proposed for the distribution of TMAO synthesis in elasmobranch fishes. -- In a detailed study of TMAO metabolism in the winter skate, it was concluded that the presence of flavin-containing monoxygenase activity does not indicate the capacity for the synthesis of TMAO. Winter skates lack measurable endogenous TMAO synthesis, apparently obtaining this compound in the diet, and maintain levels without feeding as a result of very low whole animal TMAO losses (<1% day -1 ). Betaine synthesis was also examined in detail in the winter skate, where the liver and kidney are the likely sites of synthesis. The enzymes of betaine synthesis from choline, choline dehydrogenase and betaine aldehyde dehydrogenase, are localized in the mitochondria, as is the case in other animals. Winter skates do not activate betaine synthetic capacity in response to food deprivation or accumulate betaine in the muscle when exposed to a hyperosmotic challenge; however, muscle betaine content increases when they are fed a high betaine diet, suggesting exogenous methylamine supply may be a key determinant in muscle methylamine accumulation in elasmobranchs.


identifier: Trend, Fiona <https://research.library.mun.ca/view/creator_az/Trend=3AFiona=3A=3A.html>   (2004) How death anxiety and empathy are affected in a class of medical students who have experienced a peer death.  Masters thesis, Memorial University of Newfoundland.

abstract: Death is a certainty. We are socialized into our understanding of death by the culture, family, and society in which we live. We also live in a highly medicalized society. While it is possible for most of us to travel through life and, for the most part not think about death and dying, doctors do not always have that luxury. As a medical student one will unerringly be exposed to death as a part of their professionalization. In facing death, doctors face their own vulnerability. What they do with their emotions when they encounter death can influence the way they interact with patients. Showing empathy and compassion towards patients is essential for a good doctor-patient relationship. Research suggests, for example, that patient compliance is related to the physician's ability to communicate effectively with patients, and empathy is the key aspect of this communication (Jarski, 1987). In a class of medical students who have experienced a peer death, there is a unique opportunity to look at the effects of death on empathy and death anxiety. Differences between classes were statistically insignificant ( p > .05) for both empathy, measured with Hogan's Empathy Scale, and fear of death, measured with the Collett-Lester Fear of Death Scale. When divided into gender, females presented as slightly more empathetic than the men in the study ( p > .10). Gender also had a significant effect on overall death anxiety (p > .015), and the "fear of death of self" ( p > .000) and "fear of dying of self" (p > .01) domains of the scale with females presenting as more fearful. When divided by age, empathy scores were not statistically different between the groups. There was a significant difference in death anxiety for the overall scale (p > .01) and "fear of dying of others" (p > .01) with those 25 years of age and older presenting with less death anxiety.


identifier: Tsaltas, Georgia-Zetta H. <https://research.library.mun.ca/view/creator_az/Tsaltas=3AGeorgia-Zetta_H=2E=3A=3A.html>   (1994) Internalization of a monoclonal antibody recognizing carcinoembryonic antigen (CEA) by human cancer cell lines.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Monoclonal antibody (Mab) internalization by cancer cells has been recently gaining increasing recognition as one of the important factors affecting the action of Mabs or immunoconjugates (ICs) on tumour sites. This project addresses the underexplored subject of internalization, by comparing existing internalization assays in terms of accuracy and consistency, as well as by developing more rapid and concise methods for the detection of internalized antibody. A number of in vitro techniques for investigating internalization are evaluated, using a model which consists of a well characterized anticarcinoembryonic antigen (anti-CEA) Mab and a number of CEA expressing human cancer cell lines. Employing two alternative radiolabelling assays, evidence for internalization of an anti-CEA Mab by a CEA-positive colorectal cancer cell line (LS174T) was obtained throughout the time intervals examined (5 min to 150 min.). A widely employed internalization assay involving the use of a low pH buffer for the dissociation of surface antigen-antibody bonds, has been thoroughly analyzed and shown not to fulfill its alleged role, thereby introducing inaccuracies in the experimental method. Electronmicroscopy employing horseradish-peroxidase labelled anti-CEA Mab, permitted the direct visualization of anti-CEA Mab related staining in intracellular compartments of a high CEA-expressor human colorectal cell line (SKCO1). SDS/PAGE analysis of samples derived from cytosolic and membrane components of solubilized cells from lung and colonic cancer cell lines, provided evidence for non-degraded internalized anti-CEA Mab throughout seven half hour intervals, starting at 5 minutes. Internalized anti-CEA was detected in all CEA expressing cell lines (LS174T, SKCO1, BENN) but not in the case of a very low CEA expressor line (COLO 320). When the last method was compared to a newly developed internalization assay involving flow cytometry, results were very similar for all the above cell lines. Given that these two methods consistently provided comparable results, use of flow cytometry for the detection of internalized antibody is suggested as a fast and uncomplicated alternative to the internalization assays used at present. Finally, the question of the endocytic route followed by CEA-anti-CEA complexes is addressed through blocking clathrin-mediated endocytosis in the cell lines examined. Preliminary results indicate that such complexes may be internalized only partially by clathrin-coated vesicles, with an alternative uptake-endocytic mechanism also at work.


identifier: Tucker, Amy <https://research.library.mun.ca/view/creator_az/Tucker=3AAmy=3A=3A.html>   (2011) Stakeholder participation and communication in the Placentia Bay/Grand Banks large ocean management area.  Masters thesis, Memorial University of Newfoundland.

abstract: This research examines the nature and extent of stakeholder participation and communication in the Placentia Bay/Grand Banks Large Ocean Management Area (PB/GB LOMA) in Newfoundland and Labrador, Canada. The PB/GB LOMA is an integrated management initiative which is being implemented under Canada's Oceans Act. The research has shown that many stakeholders are participating in the PB/GB LOMA process as they see its potential benefits. However, progression is limited by a lack of understanding of its goals and process. The research has also shown that there is a lack of stakeholder buy-in within PB/GB LOMA, which needs to be addressed for the process to move forward successfully. This study also found that communication channels are present for communicating about coastal and ocean issues, and that the communication network is generally strong. However, this network has not often been used to communicate about the PB/GB LOMA specifically. As the process moves forward, it is particularly important that stakeholder group representatives communicate about the LOMA to their groups. It will also become increasingly important that the LOMA be brought to the attention of the public, which at this point is generally unaware of the initiative.


identifier: Tucker, Budd A. <https://research.library.mun.ca/view/creator_az/Tucker=3ABudd_A=2E=3A=3A.html>   (2006) Cooperation between integrin and growth factor receptor signalling in the regulation of neurite growth from rat sensory neurons.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Like growth and guidance of developing axons, regeneration after axonal injury is predominantly influenced by factors located in a neuron's extracellular environment. These factors include neurotrophins, such as Nerve Growth Factor (NGF), and adhesion molecules, such as laminin. However, how these factors interact to stimulate optimal levels of neurite growth is largely unknown. In this thesis, I initially investigated whether attachment to permissive culture substrates is sufficient to promote neurite outgrowth from DRG neurons, and whether this interaction is able to enhance the response of neurons to added neurotrophic factors, such as NGF. Adult Dorsal Root Ganglion (DRG) neurons plated on surfaces coated with a thin film of laminin exhibited increased neurite outgrowth, this growth was correlated with increased expression of laminin binding integrin subunits. Laminin-induced neurite growth was integrin-dependent as it was attenuated by treatment with either a cyclic Arg-Gly-Asp (RGD) peptide or a β1 integrin-blocking antibody (β1i). The addition of NGF to cells plated on laminin resulted in a significant and synergistic increase in the integrin-dependent outgrowth. -- In performing these experiments it was observed that not all DRG neurons were responding to laminin and NGF with increased neurite growth. As neurons in the adult rat DRG can be classified into at least three separate subpopulations based on morphologic and phenotypic differences, a cell selection approach was utilized to show that laminin-induced neurite growth occurs in the absence of added trophic factors only in heavy chain neurofilament positive and calcitonin gene related peptide positive DRG neurons (NGF-responsive population). In contrast, laminin alone is not sufficient to stimulate significant neurite growth from lectin Griffonia simplicifolia 1B4 positive neurons (IB4+ve), although it is still required to elicit a growth response from these cells in the presence of Glial Cell Line Derived Neurotrophic Factor (GDNF) (e.g., neurite growth occurred only when cells were plated on laminin in the presence of GDNF). By using chemical inhibitors we demonstrated that only the PI3-K/Akt pathway was required for neurite growth from the NGF-responsive cell population. However, both the PI3-K/Akt and MEK/MAPK signalling pathways were required for neurite growth from the IB4+ve cell population. Further analysis indicated that Src was potentially a key point of collaboration between NGF and laminin induced neurite growth in NGF-responsive adult DRG neurons. Src appeared to be located upstream of the PI3-K/Akt signalling pathway and was responsible for increased neurite growth induced by the addition of laminin and NGF together. -- In this series of studies we have identified specific signalling events and environmental requirements associated with neurite growth for different subpopulations of adult DRG neurons, pointing to potential therapeutic targets while identifying why any one treatment alone maybe insufficient to totally repair peripheral nerve damage.


identifier: Tucker, Kyle B. <https://research.library.mun.ca/view/creator_az/Tucker=3AKyle_B=2E=3A=3A.html>   (2007) Validation of full-scale and small-scale transmission line test results on dynamic loads with numerical modeling.  Masters thesis, Memorial University of Newfoundland.

abstract: This research presents the numerical validation of two different failure test data. These are: (1) suspension insulator failure test and (2) conductor failure test. The first failure scenario deals with the study of the effect of dynamic load on adjacent towers due to a broken suspension insulator; while the second scenario deals with the effect of dynamic load on a tower when the adjacent tower has failed due to conductor rupture. The published data were gathered from full scale as well as scale model tests for model validations. A finite element model of the line was developed using three different element types. Incremental nonlinear dynamic analysis was carried out in the time domain using a commercially available software package. -- Using full-scale test data from broken insulator at the suspension point, a numerical model was developed. Upon validation of the numerical model with the test results, a sensitivity study was carried out for various insulator lengths, ice thicknesses and initial tensions to determine the effects of these parameters on the impact loads on the tower cross arm. Results of the study show that the impact loads are less sensitive to the change in insulator length and initial tension but they do vary significantly when the ice loads are increased. The magnitude of the effect of incremental ice thickness has not been quantified in any previous study. A coordination of strength study showed that a suspension insulator failure can increase the conductor tension considerably thus initiating conductor rupture and therefore, a possible cascade failure in the longitudinal direction. -- Using the scale model test data for broken conductor, a numerical model was developed where a number of towers were allowed to fail (one at a time) in a preferred sequence and the peak forces predicted on the surviving tower. This predicted peak force was compared to the experimental results and a reasonable correlation was established. Results show clearly that by allowing a few structures to fail, the longitudinal peak load on the surviving tower can be reduced significantly. This information can then be used in the design of the anti-cascading tower for proper cascade failure containment. -- The study results show clearly that the analysis of dynamic load assessment on transmission system is possible and is cost effective using commercially available finite element software.


identifier: Tucker, Maryanne <https://research.library.mun.ca/view/creator_az/Tucker=3AMaryanne=3A=3A.html>   (2013) University students and alchol use: a positive deviance perspective.  Masters thesis, Memorial University of Newfoundland.

abstract: Dangerous alcohol consumption among university students continues to be a major issue in Canada. Numerous studies, focusing on high-risk alcohol consumers, have explored potential variables to explain this behaviour. Positive deviance (PD) offers an alternative framework, one that looks to members of the at-risk group whom manage to demonstrate behaviours that are more functional and healthy as compared to the more typical 'deviant' behaviour. This study examines whether variables identified in the sexual health and delinquency PD literature (e.g., perceived self-efficacy) would predict responsible alcohol consumption among university students. Three categories of students were surveyed: current alcohol abstainers (n=89), responsible drinkers (n=115), and binge drinkers (n=217) using a convenience sampling strategy at an Atlantic Canadian university. Results from our multinomial logistic regression were supported (X²=246.78, df=18, p<.001), with several of our predictor variables significantly predicting group membership. While the model classification accuracy rate (i.e., 66.0%) exceeded the proportional by chance accuracy rate (i.e., 38.4%), providing further support for the model, the model itself best predicted binge drinker membership over the other two groups. Practice and future research implications are discussed.


identifier: Tudor, Corina A. <https://research.library.mun.ca/view/creator_az/Tudor=3ACorina_A=2E=3A=3A.html>   (2013) Geophysical investigations at the dorset Palaeoeskimo site of Phillip's Garden, Port au Choix, Northwestern Newfoundland.  Masters thesis, Memorial University of Newfoundland.

abstract: This thesis presents geophysical investigations at Phillip's Garden, a large Palaeoeskimo site located near Port au Choix, northwestern Newfoundland. Previous geophysical investigations at the site have focused on large scale magnetometry surveys, aimed at identifying possible buried dwellings at the site. This research expands on this by using two complimentary geophysical methods, magnetometry and ground penetrating radar, and focusing on small scale surveying aimed at identifying features within dwellings. The purposes of this research are testing the efficacy of magnetometry and ground penetrating radar in identifying features within dwellings, testing whether there is a difference between surveying excavated versus unexcavated dwellings, and assessing the best surveying increments for geophysically surveying dwellings at Phillip's Garden. The results of this research suggest that magnetometry and ground penetrating radar are useful in identifying features associated with dwellings at Phillip's Garden, particularly in unexcavated dwellings using a smaller increment between survey transects.


identifier: Tuhin, Mohammed Ashraful Alam <https://research.library.mun.ca/view/creator_az/Tuhin=3AMohammed_Ashraful_Alam=3A=3A.html>   (2007) Compiling parallel applications to coarse-grained reconfigurable architectures.  Masters thesis, Memorial University of Newfoundland.

abstract: Reconfigurable computing has been an active field of research for the past two decades. Coarse-Grained Reconfigurable Architectures (CGRAs) are gaining interest for embedded systems and multimedia applications, which demand a flexible but highly efficient platform. A CGRA comprises a network of simple programmable processing elements (PEs). CG RAs exploit the inherent parallelism and repetitive computations found in these applications and can adapt themselves to diverse computations by dynamically changing configurations. Although CGRAs have the potential to exploit both hardware like efficiency and software like extensibility, the absence of proper compilation approaches is an obstacle to their widespread use. -- In this thesis a novel approach for compiling parallel applications to a target CGRA will be presented. The application will be written in HARPO/L, a parallel object oriented language suitable for hardware. HARPO/L is first compiled to a Data Flow Graph (DFG) representation. The remaining compilation steps are a combination of three tasks: scheduling, placement and routing. For compiling cyclic portions of the application, we have adapted a modulo scheduling algorithm: modulo scheduling with integrated register spilling, which incorporates register spilling with instruction scheduling. For scheduling, the nodes of the DFG are ordered using the hypernode reduction modulo scheduling (HRMS) method. The placement and routing is done using the neighborhood relations of the PEs.


identifier: Turpin, Edna F. <https://research.library.mun.ca/view/creator_az/Turpin=3AEdna_F=2E=3A=3A.html>   (1972) Implementation of a junior high school vocational guidance program in conjunction with a district vocational school program.  Masters thesis, Memorial University of Newfoundland.

abstract: The purpose of this project was to plan and implement a career guidance program far grade eight students, in conjunction with a District Vocational School Pilot Project. This project was undertaken in response to the recognized need for Junior High Schools feeding students to pre-vocational courses. -- The Seal cove vocational School Pilot Project, of which this career guidance project was a part, was undertaken to provide a more diversified curriculum, hopefully reducing the dropout rate in the three involved school districts. It is planned that students doing vocational courses will spend part of their time in the vocational school during grades nine to eleven, while the remainder will be spent in their present schools. The need for educational and vocational guidance to help students coordinate their academic programs, then, was apparent, and led to the initiation of a career guidance program having the following goals: -- 1. To design an overall guidance plan for use by all involved school districts and the Harbour Main Vocational School district in their implementation of the Seal Cove Vocational School Pilot Project. -- 2. To plan and implement the vocational guidance program related to the Seal Cove Vocational School Pilot Project in the Conception Bay Center school district. Of the second, the major sub-goals to be achieved were: -- A. The development of self-understanding by grade eight students, as relevant to the decision to be made concerning pre-vocational courses. -- B. The provision of career and educational information, again relevant to decisions to be made concerning pre-vocational courses. -- C. The fostering of decision-making skills by students, leading to decisions about grade nine courses. These decisions were to be made by the students no later than 15 April 1972. -- There were no resources on hand at the beginning of the project which cost $1,973.00 to implement. $1,383.00 of this amount were non-recurring expenditures. One hundred and thirty-five students in five classrooms were served by a part-time guidance specialist and the district supervisor of guidance. -- The program used orientation activities for students and teachers, some communication with parents, and a variety of guidance activities including large group guidance classes and small group discussions. One field trip was organized and a student project was based upon this. A resource center was set up to make occupational and educational information available to students. Finally, a fairly extensive program of testing with some interpretation activity was implemented. -- Several problems became apparent as the project was implemented. The problems generally were organizational or administrative in nature. -- Several problems became apparent as the project was implemented. The problems generally were organizational or administrative in nature. -- The first project goal was achieved. The career guidance plan which was developed was adopted by the Vocational School planning committee and implemented in all the districts. -- The second project goal was achieved only marginally, primarily because of the organizational and administrative problems which were encountered. It was found that students did learn a considerable amount abut their vocational and educational opportunities, but their achievement in self-understanding and in decision-making was not as much as was hoped for at the beginning of the project. -- As a result of the experience of the project a number of recommendations were made for the improvement of career guidance programs when they are implemented in other areas. The major recommendations involved insuring understanding of the program goals at all levels of operation, the implementation of procedures for early recognition of students with special problems, and a thorough study of testing programs.


identifier: Tvalavadze, M. <https://research.library.mun.ca/view/creator_az/Tvalavadze=3AM=2E=3A=3A.html>   (2006) Simple subalgebras of simple Jordan algebras and simple decompositions of simple Jordan superalgebras.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: In 1952 E. Dynkin classified semisimple subalgebras of semisimple Lie algebras over an algebraically closed field F of zero characteristic. Until now there was no classification of simple (semisimple) subalgebras of simple finite-dimensional Jordan algebras. As a consequence the first problem of this thesis is a description of simple subalgebras in finite-dimensional special simple Jordan algebras over an algebraically closed field F of characteristic not 2. Using a slightly generalized version of Malcev's Theorem, Racine's classification of maximal subalgebras and other techniques developed in the thesis we can show that each simple subalgebra of a simple Jordan algebra can be reduced to an appropriate canonical form. Besides we formulate necessary and sufficient conditions for conjugacy of simple subalgebras of simple special Jordan algebra J. Therefore, in Jacobson's terminology we describe orbits of the algebra of symmetric matrices under O (n ) (the orthogonal group), orbits of the algebra of symplectic matrices under Sp (n ) (the symplectic group) and orbits of full matrix algebra under GL (n ) (the general linear group). -- The other problem considered in this thesis is the classification of simple decompositions that occur in simple Jordan superalgebras with semisimple even part over an algebraically closed field F of characteristic not 2. By a simple (semisimple ) decomposition of any algebra J (not necessarily simple) we understand any representation of J as vector sum space of two proper simple (semisimple) subalgebras. In general, the sum in this decomposition is not necessarily direct, and the subalgebras may not be ideals. The problem of finding simple decompositions has drawn researchers' interest in late 60's after the pioneering works of O. Kegel, A. Onishchik and others. Given J = A + B , the sum of two proper simple subalgebras A and B , what abstract properties of A and B does J inherit? In addition, information about the structure of simple subalgebras can be used to describe the lattice properties of simple algebras. In this thesis we determined the conjugacy classes of simple decompositions of simple matrix Jordan superalgebras with semisimple even part over an algebraically closed field F of characteristic not 2.


identifier: Tvalavadze,, T. <https://research.library.mun.ca/view/creator_az/Tvalavadze,=3AT=2E=3A=3A.html>   (2006) Structure and uniqueness of sums of simple Lie superalgebras.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: In this thesis we consider decompositions of algebras and superalgebras into the sum of two subalgebras. The sum is understood in a sense of a vector space sum and not necessarily direct. The structure of these sums has attracted considerable attention for various types of algebras. Originally, this problem arises in the work of M. Goto (1963) where he studied the case of nilpotent Lie algebras. In 1969 A. Onishchik classified decompositions of simple complex Lie algebras into the sum of two reductive subalgebras. In 1999 Y. Bahturin and O. Kegel [1] proved that no simple associative algebra can be written as the sum of two simple subalgebras over an algebraically closed field. In the joint paper with M. Tvalavadze [24], we classify decompositions of simple Jordan algebras over an algebraically closed field of characteristic not two. -- In the case of Lie superalgebras this problem was open until now. The main result of this thesis is a classification of all such decompositions in the case of basic non-exceptional Lie superalgebras, up to conjugation, over an algebraically closed field of characteristic zero. Moreover, we construct precise matrix realizations of each decomposition. -- To prove this result we consider a Lie superalgebra as a module over its even component which is a Lie algebra. Using techniques of the representation theory of semisimple Lie algebras we present the precise description of such modules for each superalgebra in the sum. This research is significantly based on the result from [26] which extends Onishchik's Classification Theorem to an arbitrary algebraically closed field of characteristic zero.


identifier: Tycholiz, Cassandra Jo-ann <https://research.library.mun.ca/view/creator_az/Tycholiz=3ACassandra_Jo-ann=3A=3A.html>   (2013) Gravity gradient inversions using unstructured tetrahedral meshes.  Masters thesis, Memorial University of Newfoundland.

abstract: Airborne gravity gradiometry is a rapidly growing field. The method is a multicomponent technique that measures the spatial rate of change in the Earth's gravitational field. A limited number of inversion programs exist to provide an interpretation of the gravity gradient data and these programs rely on the use of rectilinear meshes. The objective of this project was to use unstructured tetrahedral meshes to recover the three dimensional distribution of the subsurface density contrast. The inversions were subject to a variety of geological constraints and different gravity gradient tensor component combinations. The results indicate that adding geological constraints improves the recovered density contrast models. The advantage of using an unstructured tetrahedral mesh over a rectilinear mesh is that surfaces from three dimensional geological Earth models can be directly incorporated as geological constraints to further refine recovered models. The results also indicate that incorporating additional gravity gradient components into the inversion improves the density contrast model by better defining the size and depth extent of the geologic units. The differences between the inversion models using single versus multiple components were less apparent as more geological constraints were added.


identifier: Tye, Diane <https://research.library.mun.ca/view/creator_az/Tye=3ADiane=3A=3A.html>   (1981) A contextual study of a Newfoundland folk artist : Patrick J. Murphy, Bell Island.  Masters thesis, Memorial University of Newfoundland.

abstract: This contextual study of folk art examines the work of one Newfoundland painter and wood sculptor, Patrick J. Murphy from Bell Island, Conception Bay. It was found that the folk art has a variety of uses and functions for both artists and community. A profitable pastime, a means of exchange in reciprocal dealings, and most importantly, as a channel through which to communicate an esoteric vision of the past, the art is valuable and important to the lives of Pat Murphy and his fellow Bell Islanders.


identifier: Tzenov, Youlian Roumenov <https://research.library.mun.ca/view/creator_az/Tzenov=3AYoulian_Roumenov=3A=3A.html>   (2012) Characterization of oncogenic human pygopus2 expression and regulation.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Human Pygopus2 (hPYGO2) is a general chromatin remodeler that is overexpressed in, and required for the growth of, a number of tumours of diverse origin and their cell lines. This thesis explores the expression profile of hPygopus2 throughout the cancer cell cycle and identifies novel mechanisms by which it is activated. Examination of hPygopus2 expression and characterization of factors that enhance its expression could lead to better understanding of the signalling networks at play in cancer. It was hypothesized that hPygopus2 expression is induced in the G1 phase of the cell cycle by factors that promote cell cycle progression. The tumour specific expression of hPYGO2 and its requirement for cell proliferation, specifically at the G1/S transition, suggests that hPYGO2 induction is closely correlated with the cell cycle. -- In a set of normal and cancer cell lines, hPygopus2 mRNA and protein levels were significantly reduced in G₀, highest in G1 and moderate in S and G2/M relative to unsynchronized samples. This cell cycle dependent expression suggested that hPygopus2 may be a marker of the G1 phase in proliferating cells. Furthermore, hPYGO2 protein levels in the G2/M phase relative to the G1 phase were inversely proportional to cell cycle length, highlighting a potential utility of hPYGO2 in determining tumour cell proliferation rate. -- The requirement of hPygopus2 for cancer cell proliferation and its high expression during the G1 phase suggested that it is induced during this phase. Due to its well established role in breast cancer (BrCa), the induction of hPygopus2 by 17β-estradiol (E₂) was studied. High levels of E₂ and its receptor, Estrogen receptor alpha (ERα), are well established risk factors for the development and progression of BrCa. However, our knowledge of ERα transcriptional complex  components (and their dynamics) at E₂ target gene promoters, particularly in ERα negative (ERα-) BrCa, is incomplete. E₂ treatment of BrCa cells enhanced hPygopus2 mRNA and protein  expression via the binding of ERα and SP1 transcription factor (SP1) complexes at the hPYGO2 promoter. Promoter occupancy of these transcription factors required an intact estrogen response element half-site and GC-box and functional DNA binding domains of both proteins. While ERα binding to the hPYGO2 promoter could be prevented by pretreatment with the ERα antagonist Fulvestrant, SP1 binding was only reduced by RNAi. The ability of these proteins to independently occupy the hPYGO2 promoter suggested that SP1 may still play a role in hPYGO2 activation in ERα- BrCa. In Erα-BrCa cells, SP1 expression was required for the activation of hPYGO2 and several other "ERα-SP1 " target genes and a reduction of SP1 resulted in cell cycle arrest. Together, these findings suggested that in ERα+ BrCa, ERα and SP1 have important roles in the regulation of hPygopus2. The ability of SP1 to modulate hPygopus2 expression in the absence of ERα, suggested that hPYGO2 expression might assist in chemotherapy selection in endocrine disruptor unresponsive BrCa tumours. -- The previously demonstrated induction of hPygopus2 by the E74-like factor 1 (ELF1), a Retinoblastoma (RB) tumour suppressor regulated protein, suggested that deregulation of the RB-ELF1 axis leads to overexpression of hPygopus2. The role of the human papillomavirus (HPV) in the inactivation of RB is well characterized. Evidence was provided for hPYGO2 as a cellular biomarker expressed in response to gene deregulation by the main effector of HPV, the E7 oncoprotein, in cervical cancer (CxCa). hPYGO2 levels were greater in high-grade lesions and squamous cell carcinomas as compared to normal epithelia. Similarly, hPygopus2 mRNA and protein levels were greater in HPV-positive CxCa cells relative to uninfected primary cells. RNAi mediated depletion of HPV-E7 increased, while ELF RNAi decreased, association of RB with the  hPYGO2 promoter in CxCa cell lines. Transfection of dominant active RB inhibited ELF1-dependent activation of hPYGO2, while ELF1 itself increased hPygopus2 expression. Chromatin immunoprecipitation assays showed that RB repressed hPygopus2 by inhibiting ELF1 at the E26 transformation specific binding site in the hPYGO2 promoter. These results suggested that abrogation of RB by E7 resulted in derepression of ELF1, which in turn stimulated expression of hPygopus2. Thus, initiation of hPygopus2 expression by ELF1 was required for proliferation of CxCa cells and its expression therefore may act as a surrogate marker for dysplasia.


identifier: Uddin, Mohammad Nasir <https://research.library.mun.ca/view/creator_az/Uddin=3AMohammad_Nasir=3A=3A.html>   (2000) Intelligent control of an interior permanent magnet synchronous motor drive.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Novel speed control techniques using intelligent computation algorithms for the interior permanent magnet synchronous motor (IPMSM) to be used in high performance drive (HPD) systems are presented. In HPD systems, fast and accurate speed response and quick recovery of speed from any uncertain disturbance are of critical importance. The vector control technique is used in this work to obtain the highest torque response for the IPMSM drive. In the vector control scheme, both the current and the speed controllers play an important role for the drive performance. -- In order to select a suitable current controller, a current controlled voltage source inverter (VSI) fed IPMSM drive is developed and implemented in real-time. The performance of various current controllers, particularly hysteresis and ramp comparator controllers for the IPMSM drive, are investigated both theoretically and experimentally. A comparison is also made among the current controller performances for the IPMSM drive. -- In this work, the control of the IPMSM over a wide speed range incorporating the flux weakening operation is also presented. The scheme incorporates the maximum torque per ampere operation in the constant torque region and the flux-weakening operation in the constant power region. The performance of this proposed technique is evaluated by simulation results as well as by experimental results. A comparison between the flux-weakening control technique and the conventional constant flux control scheme is also presented. -- An integral part of this work is directed to develop and implement a fuzzy logic controller (FLC) for the IPMSM drive in order to overcome the unknown and/or nonlinear disturbances such as sudden load change, parameter variations, step change of command speed and system noise, etc. A specific FLC for the IPMSM is developed from the motor dynamics and nonlinear load characteristics. The complete vector control scheme incorporating the FLC is successfully implemented in real-time using the digital signal processor (DSP) board DS1102 for the laboratory 1 hp interior type permanent magnet motor. In order to achieve the better switching performance for the current controlled VSI, an insulated gate bipolar transistor (IGBT) inverter module and its associated drive circuits are also built in the Power Research Laboratory of Memorial University of Newfoundland. Numerous tests are carried out for the IPMSM drive at different dynamic operating conditions to evaluate the efficacy of the fuzzy logic controller. The experimental results validate the robustness and hence justify the applicability of the FLC for the IPMSM drive to be used in high performance drive applications. In order to prove the superiority of the FLC over the conventional controllers a comparison between the proposed FLC based system and the conventional proportional-integral (PI) controller-based system is made based on experimental results at different dynamic operating conditions. There is an excellent agreement between the simulated and the experimental results for the FLC based system.


identifier: Uddin, Mohammed Jasaim <https://research.library.mun.ca/view/creator_az/Uddin=3AMohammed_Jasaim=3A=3A.html>   (2013) Detection of rearrangement hotspots and their implication in complex human diseases.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract:
A segment of DNA can vary in the number of copies between two or more genomes known a copy number variation (CNV). CNVs are a common genomic variant that is now shown to be associated with numerous diseases. A large portion of the genome (approximately 12%) has shown to be vulnerable in producing common or rare CNVs. These genomic regions are often prone to rearrangement due to the underlying molecular mechanisms (i.e. non-allelic homologous recombination (NAHR), non homologous end joining (NHEJ), fork stalling and template switching (FoSTeS) and microhomology-mediated break-induced recombination (MMBIR)) that gives rise to inter-individual genetic differences through copy number changes. -- Segmental Duplication (SO) is another type of genomic variant and is at least 1 kb in length with >90% sequence identity with other genomic regions, constitutes a significant portion of the human genome. A pair of SO block that are homologous to each other influences the rate of NAHR events, often resulting in CNVs. Large portions of SDs overlap with CNVs, some of which are associated with disease. Although investigating SO is important to the study of evolution, and for inferring the underlying mechanism of nearby CNVs, the structural relationship of SDs and CNVs in complex disease is yet to be elucidated. Detecting SO is notoriously complex and genotyping single nucleotide polymorphism (SNP) within these regions is near impossible with traditional array based approaches. -- The primary objectives of this thesis are - i) to detect CNVs arising from complex genomic rearrangements mediated through SDs; ii) to design a custom microarray, targeting rearrangement hotspot regions and iii) to identify novel CNVs associated with complex disease (i.e. Ankylosing Spondylitis (AS) and Tourette Syndrome (TS)) using the custom microarray. -- Until the advent of high  throughput whole genome sequencing, the primary CNV detection methods included SNP genotyping arrays, comparative genomic hybridization (CGH) arrays, clone-PCR product arrays, and fluorescent in situ hybridization (FISH). Each method is reported to have pros and cons show no single method have the capacity to detect the entire CNV content in a genome. In this thesis, the use of SNP microarrays (primarily designed for SNP genotyping) to detect CNVs in a complex disease cohort was explored. This analysis shows the limited capacity of existing SNP arrays for the detection of CNVs. In light of this apparent complexity on the detection of CNVs, a hybrid model was described in the second chapter to detect SDs and CNVs using both whole genome sequencing and microarray technologies. The whole genome sequence analysis was performed to detect approximately 2000 rearrangement hotspots within SDs for an African genome (18x coverage). A high density microarray consisting of 2 X 1 million probes was custom designed targeting the hotspots. -- The application of the microarray leads to the detection of a large number of CNVs and was applied on two complex (i.e. Ankylosing Spondylitis (AS), and Tourette Syndrome (TS)) diseases to identify novel disease
associated CNVS. The third chapter shows the detection of a highly stratified gene UGT2B17 in copy number and its association with Ankylosing Spondylitis. The fourth chapter of this thesis show the application of the custom array that leads to the detection of a novel locus at 2q21.1-q21.2 for Tourette syndrome. CNVs breakpoint within the locus show atypical microduplications includes C2orf27A gene that segregates within multiple generations correlates with severe TS phenotypes.


identifier: Ulan-Kvitberg, Christopher Alan <https://research.library.mun.ca/view/creator_az/Ulan-Kvitberg=3AChristopher_Alan=3A=3A.html>   (2012) Adapting pressure films to measure pressure patterns in ice-steel interaction experiments.  Masters thesis, Memorial University of Newfoundland.

abstract: Exploration and recovery of arctic resources involves potential risks to ships and structures from ice loading. This thesis investigates the suitability of using chemical pressure-sensing films for ice-structure interaction experiments. A method of adapting the pressure films for use in laboratory-scale ice crushing experiments is first developed. Using the films, a series of uniaxial crushing tests under a range of factors are performed to develop 2D and 3D pressure maps, pressure-area curves and load histories. The results are analyzed to determine the spatial changes to ice under load and the connection between process and spatial pressure-area curves is investigated. Pressure-area equations are developed to compare the results to past research. The suitability of pressure-films for ice tests is analyzed and improvements for future experiments are  suggested.


identifier: Urquhart, Emily <https://research.library.mun.ca/view/creator_az/Urquhart=3AEmily=3A=3A.html>   (2013) The 21st century outport: reimagining home in Newfoundland.  Doctoral (PhD) thesis, Memorial University of Newfoundland.


identifier: Valerio, Paul F.(Paul Federico) <https://research.library.mun.ca/view/creator_az/Valerio=3APaul_F=2E=28Paul_Federico=29=3A=3A.html>   (1995) The development of embryos and larvae of the Atlantic cod, Gadus morhua, with particular emphasis on the ontogeny of chloride cells.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Chloride cells are mitochondria-rich ion-transporting cells (ionocytes) that secrete chloride from epithelial surfaces. The origin and differentiation of presumptive chloride-secreting cells in Atlantic cod (Gadus morhua) were studied by a combination of light and electron microscopy. -- By examination of available literature data, in conjunction with data collected from the present study, estimates of the effect of temperature on hatching time in the Atlantic cod were made. Subsequently, methods for the localization of chloride cells were developed, and compared with classical methods of staining ionocytes. Ionocytes were stained using conventional mitochondrial dyes, potential-sensitive fluorescent mitochondrial dyes (including styryl and rhodamine dyes, and a novel aldehyde-fixable rhodamine derivative), a fluorescent probe for the Na⁺, K⁺-ATPase (the ouabain derivative, anthroyl-ouabain), a cardiolipin-specific probe (nonyl-acridine orange), tetracycline, a lipophilic membrane probe (DiOC₆(3)), and conventional precipitation methods for ion localization. -- Staining methods were used to examine the gradual differentiation of ionocytes from mitochondria-rich precursor cells. This information was applied to the analysis of chloride cell differentiation from the embryonic stages through to maturity. -- The development of Atlantic cod embryos and larvae was then observed under various salinity and temperature conditions, and in the presence of hormone or vitamin-supplemented media, to determine the potential role of exogenous factors on the timing of chloride cell differentiation. -- A variety of secretory cells, including sacciform, goblet and ionocytes, developed in the epidermis of cod embryos and larvae. In the embryo, ionocytes first appeared on the yolk sac and buccal/gill (oropharyngeal) cavity epithelium. Such cells were lenticular, and often had a large multilobed nucleus. Some appeared to be binucleate. Beyond yolk sac absorption, ionocytes appeared on the gill filament epithelium, and were retained on the oropharyngeal epithelia, but not the abdominal region. In postmetamorphic stages, oropharyngeal ionocytes become elongate and traversed epithelia that were several cells thick. -- Although some experimental treatments delayed or accelerated rates of embryo development, yolk sac chloride cell differentiation appeared to occur after epiboly completion in all cases. The pattern of distribution of chloride cells in the later embryonic and larval stages appeared to be a result of migration of undifferentiated cells over the surface of the yolk sac and into the pharyngeal cavity. This migration probably occurs through pharyngeal 'pores', the embryonic precursors of the openings to the adult gill chambers, and is ultimately responsible for the recruitment of epithelial cells (including chloride cells) by the developing gill filaments.


identifier: Van Biesen, Geert <https://research.library.mun.ca/view/creator_az/Van_Biesen=3AGeert=3A=3A.html>   (2003) Lipid class and fatty acid composition of plankton and settling particles at a fish enclosure, and of cod (Gadus morhua) in Gilbert Bay, Labrador.  Masters thesis, Memorial University of Newfoundland.

abstract: A small cod enclosure was set up in Gilbert Bay, Labrador. The lipid class and fatty acid composition of plankton and settling particles on a transect away from the net pens were determined in order to see if biomarkers for the dispersal of organic waste could be identified. Free fatty acid levels and the proportions of the long-chain monounsaturated fatty acids 20:1ω9, 22:1ω9 and 22:1ω11 in the settling particles close to the pens (5 m) were significantly higher (p < 0.05) than before the fish enclosure was in operation, and than further away from the pens. This is consistent with a higher input of feed and/or feces at this location. Free fatty acids are the major lipid class in fish feces, while the long-chain monounsaturated fatty acids are present in high proportions in the feed and in fish feces. -- Gilbert Bay cod (Gadus morhua) muscle and liver were analyzed for lipid content and composition and compared interannually and with offshore cod. This study could not detect any clear differences between Gilbert Bay cod from 2001, offshore cod from 2001 and offshore cod from 2002. However, Gilbert Bay cod caught in 2002 just after the winter had different muscle and liver fatty acid profiles than the three aforementioned groups of cod, which were caught in midsummer. The differences can be related to starvation during the winter, as evidenced by an average lower hepatosomatic index and a higher water content of muscle and liver.


identifier: Van Kesteren, Alfred Rein <https://research.library.mun.ca/view/creator_az/Van_Kesteren=3AAlfred_Rein=3A=3A.html>   (2004) The significance of forest cover, topographic position and some meteorological variables for throughfall of rain under a balsam fir forest in western Newfoundland.  Masters thesis, Memorial University of Newfoundland.

abstract: Throughfall, the process of rainfall passage through a tree canopy to the forest floor, is a major water flux in the forest hydrological cycle. Balsam fir has not been studied for this flux in western Newfoundland where it is the predominant tree species. -- Data were collected from June 7 to October 7 1998 to describe throughfall magnitudes and variability. An analysis of variance model was applied to investigate balsam fir forest cover, topographic position and interaction of these factors on throughfall receipt. A sample size of 36 plots for incident rainfall and 36 for throughfall was monitored during the study. Correlative relationships with meteorological variables recorded by a on-site data logger system were also investigated. -- Balsam fir forest cover was found to be the predominant variable influencing throughfall flux on a seasonal basis, with the throughfall percentage averaging 85% of incident rainfall over 28 discrete rainfall events. High inter-event variability in throughfall flux was found and is attributed to differences in the character of the rainfall events over the study duration. Topographic position was not significant on a seasonal basis. Significant meteorological influence amongst collections was detected. Air temperature, relative humidity and wind speed were not correlated with the throughfall magnitudes. Weighting of rainfall amounts and intensities did exhibit significant correlation. Analyses of wind direction at the plot level demonstrated significant windward and leeward effects on throughfall magnitudes. The throughfall process was dominated by canopy saturation and a steady state drip, although minor occult precipitation influences were observed. An exceedance of throughfall over incident rainfall was also observed, indicating the presence of non steady state throughfall regimes for balsam fir forest cover.


identifier: Vasisht, Sanjeev <https://research.library.mun.ca/view/creator_az/Vasisht=3ASanjeev=3A=3A.html>   (2005) A study of preferred orientations in gold/silica/silicon interfaces.  Masters thesis, Memorial University of Newfoundland.

abstract: The interfacial structure of Au (metal) on Si(100), Si(111) and SiO2 (non-metal) substrates are studied owing to their immense use in the microelectronic industry. The interface study is important for understanding the structure-property relationships in materials. -- The final orientation distribution of metallic crystalline films grown on these amorphous/crystalline, amorphous substrates namely Au/SiO2 /Si(100); Au/SiO2 /Si(111); Au/SiO2 is strongly influenced by preferred orientations. Preferred orientations can be due to atomic mismatch, interface defects, anisotropy in crystal nucleation, growth rates, kinetics, etc. Geometric models have tried to explain the phenomena occurring at the interface to some extent. -- The orientation of Au{111}, close-packed planes was found to be of low energy as the annealing temperature was increased, also a greater numbers of Au peaks of higher intensity were observed, implying more rotation of Au particles into preferred orientations of low energy. Orientations were observed to be influenced by Silicon substrates across native oxide of 20--35 Å; this suggests the effect of long range ordering via interfacial layer. The XRD/Pole figures, SEM/EDS and AFM were the tools used to characterize the prepared samples. The average crystallite size was determined by various methods on stage III samples and it was found to be fairly consistent.


identifier: Veerana, G. M. <https://research.library.mun.ca/view/creator_az/Veerana=3AG=2E_M=2E=3A=3A.html>   (1971) A study of the changing occupational composition and educational attainment of the labour force in Newfoundland.  Masters thesis, Memorial University of Newfoundland.

abstract: Changes in the occupational composition of any labour force over time are the outcome of two distinct processes, namely, the shifting distribution of employment among industries due to changes in demand and, secondly, evolution in the occupational pattern within individual industries due to changes in production function and technology and in relative factor-prices. Economic development imposes varying mix of occupations that is compatible with the new and advanced methods of production. This progress creates inevitable changes in quality and quantity of various occupations. Given these complex forces that determine the occupational composition, this study attempts an analysis of (1) the changing occupational composition of the labour force in Newfoundland since 1945, (2) general causes of the occupational changes in terms of supply and demand, (3) the likely occupational composition of the provincial labour force in 1971 and, finally, a general assessment of the educational attainment of the labour force during 1945-61. -- Chapter I deals with concepts, scope and methodology. -- Chapter II analyzes the changing occupational composition of the provincial labour force in the context of occupational changes in the Canadian and the Nova Scotian 1abour forces. -- Chapter III attempts a supply and demand analysis of the changing occupational composition in the province. -- Chapter IV deals with a projection of the occupational composition of the provincial labour force in 1971. -- Chapter V gives a general assessment of the educational attainment of the labour force.


identifier: Venkataram, Krishna Murthy <https://research.library.mun.ca/view/creator_az/Venkataram=3AKrishna_Murthy=3A=3A.html>   (1969) Some aspects of the British policy in Ethiopa 1847-1868.  Masters thesis, Memorial University of Newfoundland.

abstract:
Though informal contacts between Britain and Ethiopia had existed from the eighteenth century, it was only in 1848 that Consular relations between the two powers were established. The need to counteract the growing French activity on the Red sea coast which seemed to threaten the sea route to India, the desire to extend British commerce in the region, and the mid-Victorian belief in civilizing underdeveloped people had prompted Britain to take the initiative. -- While Britain considered the 1848 treaty with Ethiopia a means to promote these aims, the Ethiopians, being uninterested in trade, tried to use it as a lever to obtain British support against the Turks from whom they hoped to recover some territories that had been a part of the historic Ethiopian empire. In this they were disappointed as Britain would not antagonize the Ottoman empire through which passed the traditional overland routes to India. This led to unfortunate misunderstandings since the Ethiopians considered as their enemies all those who were on friendly terms with Turkey. -- Since these positions were irreconcileable, Anglo-Ethiopian relations could hardly have been expected to fare better than they did. The actual rupture came
as a consequence of Theodore's imprisonment of the British Consul and his subsequent intransigent attitude towards British proposals which in turn forced the British government to send a military expedition in 1867 to free the captives and thus to restore the supposedly lost British prestige in the region. -- Having achieved these objectives, without claiming any concessions for herself, Britain withdrew from Ethiopia. This was no great sacrifice since to safe guard her interests on the Red Sea coast, which was under the control of friendly Turkey, Britain had no need to rule Ethiopia. Moreover, since 1848 France had ceased to be active in Ethiopia, and this had removed the chief motive for Britain's presence there. Above all the race for the partition of Africa had not yet begun. -- The two decades of British relations with Ethiopia seemed to be an exercise in futility.


identifier: Vera, Javier A. <https://research.library.mun.ca/view/creator_az/Vera=3AJavier_A=2E=3A=3A.html>   (2004) Assessing motion stress levels on board fishing vessels of the Newfoundland fleet.  Masters thesis, Memorial University of Newfoundland.

abstract: The aim of this study is to develop a numerical tool that could be used to assess the physical stress levels associated with the vessel motions on board fishing vessels of the Newfoundland fleet. A number of full-scale sea trials of typical fishing vessels of the fleet are underway to validate the numerical tool. Model experiments are expected to follow in the next year. If desirable correlations between the trials and the numerical results are obtained, simulations will be performed to obtain typical 'motion stress' profiles of various fishing boats over a typical fishing season. 'Motion Stress' will be quantified in terms of a parameter known as 'Motion Induced Interrupt' frequency (MII). Other parameters that can quantify the motion stress levels can also be incorporated into the numerical tool. Among them would be seasickness criteria and another postural stability index, which relates the motion levels on board to the 'motion stress'. -- For full-scale trials, two vessels will be used initially. In terms of their sizes, these represent one of the smallest vessels and one of the larger vessels of the fleet. During the trials a directional wave buoy was used to measure the wave characteristics. -- The Thesis will include the results from the full-scale sea trials and the numerical tool. Additionally, some sample results for motion stress levels will be presented.


identifier: Verginis, Panayotis <https://research.library.mun.ca/view/creator_az/Verginis=3APanayotis=3A=3A.html>   (2005) Immunoregulation of experimental autoimmune thyroid disease.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Experimental autoimmune thyroiditis (EAT) can be induced in mice after challenge with thyroglobulin (Tg) in complete Freund's adjuvant (CFA). EAT resembles Hashimoto's thyroiditis (HT) in humans and is characterized by mononuclear cell infiltration of the thyroid gland leading to hypothyroidism. -- In the first part of this study, we attempted to delineate pathogenic Tg peptides that encompass dominant epitopes in order to study immunoregulation mechanisms in EAT. Since susceptibility to EAT is under the control of H-2A k genes, we utilized an algorithm-based approach that predicts peptides with Ak -binding potential. Five Tg peptides were found to induce EAT in CBA/J (H-2k) mice. In addition, all five peptides were immunogenic at the T cell level and induced production of IL-2 and IFN-[gamma] by peptide-primed LNCs. Although none of these Tg peptides encompass dominant epitopes, they will allow us to study mechanisms involved in the immunoregulation of EAT. Furthermore, one of the five new Tg peptides (a.a. 2596-2608), was pathogenic in H-2k strains of diverse non-H-2 background but not in mice of q, s, d, and b haplotypes. The above findings provide important information regarding the influence of H-2 and non-H-2 genes in the thyroiditogenic potential of the Tg peptides. -- In the second part of this study, we showed that TNF-[alpha]-treated, semimature DCs pulsed with Tg, but not with OVA antigen suppressed Tg-induced EAT in CBA mice, through the induction of Tg-specific CD4+ CD25 + T cells. These CD4+ CD25+ Treg cells produce high levels of IL-10 and inhibit the proliferation of Tg-specific effector cells in vitro. Suppression was shown to be cytokine-independent but cell-cell contact dependent. Additionally, adoptive transfer of the CD4 + CD25+ Treg cells into CBA hosts suppressed Tg-induced EAT confirming the suppressogenic potential of this cell subset. The induction of antigen-specific Treg cells will contribute to understand the mechanisms involved in the immunoregulation of autoimmune diseases. -- Finally, we describe the generation of transgenic mice specific for the p2496 pathogenic Tg epitope. The [alpha] and [beta] chain of a p2496-specific I-As -restricted T cell hybridoma were identified and inserted into TCR expression vectors. Linearized fragments containing the [alpha] and [beta] chain genes and the constant chain regions were injected into fertilized oocytes of (SJLxC57BL6) mice and integration of the transgene was monitored by PCR. The p2496-specific TCR transgenic mice will provide an excellent source of p2496-specific naïve T cells that will be used to answer questions on the maintenance of self tolerance. In addition it allow the study of parameters that lead to activation of the autoractive T cells and initiation of EAT.