identifier: Khan, Mohammad Aminul Islam <https://research.library.mun.ca/view/creator_az/Khan=3AMohammad_Aminul_Islam=3A=3A.html>   (2013) Predictive monitoring and control.  Masters thesis, Memorial University of Newfoundland.

title: Predictive monitoring and control

abstract: This thesis investigates the effectiveness of model predictions in two important fields of process operation: process monitoring and process control. Both monitoring and control are essential for the safe and optimal operation of a chemical process. Process monitoring is necessary to notify the operator about an undesired condition, whereas a controller directs a process to desired condition. In Part I of the thesis, a novel model-based predictive technique is proposed for early warning generation to the operator. In Part II of the thesis, an in-depth simulation-based investigation is carried out to evaluate t he performance between two control structures: 'model predictive controller (MPC) cascaded to the proportional-integral-derivative (PID) controller', and 'PID-free MPC'. -- The proposed early warning generation method uses open-loop process model and disturbance model. Process feedbacks are used to correct prediction bias. This method exploits t he controller limitations in dealing with process time delay and actuator constraints. An warning in form of alarm is issued if the open-loop predictions exceed the threshold within the process time-delay. Actuators also plays a major role in controlling processes. If at any point actuators do not have sufficient capacity, controller will fail to regulate t he process. Using t he process gain, measurements, and constraint information a linear programming algorithm is used to check t he existence of a feasible solution that meets all constraints. An alarm is generated if no feasible solution can be found (i.e., the actuator does not have sufficient capacity). The proposed method is applied to a single-input-single-output (SISO) and a multi-input-multi-output (MIMO) continuous stirred tank heater (CSTH) system. The method gave early warnings compared to the existing safety systems. Also the method demonstrated robustness under small disturbance in the process.  -- The comparative study between the 'MPC-cascaded to PID' and the 'PID-free MPC' structure is carried out on a simulated CSTH system. In the cascaded structure the flow-loops are regulated by the PID controller. On top of that a dynamic matrix controller (DMC) manipulates the set-points of the flow-loops to control tank temperature and level. The 'PID-free MPC' structure uses a dynamic matrix controller (DMC) to manipulate the valve positions directly. The study reveals that the PID-free MPC structure outperforms the cascade structure in both disturbance rejection and set-point tracking. However, the PID-free MPC structure demands more control action and has more computational load. Integrated square error (ISE) is used to quantify the performance.


identifier: Khan, Mohammad Jahangir Alam <https://research.library.mun.ca/view/creator_az/Khan=3AMohammad_Jahangir_Alam=3A=3A.html>   (2004) Dynamic modeling, simulation and control of a small wind-fuel cell hybrid energy system for stand-alone applications.  Masters thesis, Memorial University of Newfoundland.

type: Thesis NonPeerReviewed

abstract: In this thesis, a detailed analysis of a wind-fuel cell hybrid energy system for stand-alone applications is carried out. Initially, a pre-feasibility study for such a system is conducted and for a given load, the sizes of various components are determined. Dynamic models of these components are developed based on empirical and physical relationships. The hybrid system is then integrated and simulated for investigating the transient behaviors during sudden load variation, wind speed change and hydrogen pressure drop. Optimization software tool HOMER is used for the pre-feasibility study and MATLAB-Simulink® is employed for dynamic system modeling. Finally, results of this analysis are summarized and scope for future works are indicated.


identifier: Khan, Muhammad Mohsin K. <https://research.library.mun.ca/view/creator_az/Khan=3AMuhammad_Mohsin_K=2E=3A=3A.html>   (2005) Reliability analysis and condition monitoring of a horizontal axis wind turbine.  Masters thesis, Memorial University of Newfoundland.

abstract: Wind is one of the cheapest and cleanest sources of energy. However, large and frequent fluctuations in wind intensity and directions cause serious problems in harvesting this energy. Wind turbines are subjected to many harsh environmental conditions, which lead to their failure or degraded performance. Hence an assessment of total lifetime and reliability of wind turbine components is required. Moreover a condition monitoring system is also needed to keep an eye on ever changing effects of environment on different components. This thesis comprises of two main objectives. -- First objective of research deals with component based reliability analysis, which involves four steps. To accomplish first objective an assessment of failure modes using Failure Mode and Effect Analysis (FMEA) approach is first conducted. Subsequently, based on working and environmental conditions and failure characteristics, the reliability of each individual component is computed. Standard procedures like fault tree and markov analysis are also carried out. -- The second goal of research makes use of the results of reliability analysis, to design a safety system for wind turbines. Based on sensitivity of all the components, a number of parameters are selected for monitoring the most venerable components. A monitoring system is suggested using a single board computer (SBC), signal conditioning electronics and sensors. This SBC is responsible for monitoring of selected parameters. This computer as proposed in thesis will interact with system's built in PLC to initiate shutdown of the system if an alarming changes in parameters are detected. -- This research brings in to focus the need for a component based reliability analysis of small wind turbine systems. These systems appear to be reliable for some portion of the year and remain in stand by or for maintenance rest of the time. The need for condition monitoring system is also proved by lower reliability of specific components that require constant monitoring.


identifier: Khan, Muhammad Ahmad <https://research.library.mun.ca/view/creator_az/Khan=3AMuhammad_Ahmad=3A=3A.html>   (2005) Quality characteristics of Newfoundland cultured blue mussels (Mytilus edulis) at pre- and post-harvest stages.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Despite the rapid increase in production of Newfoundland cultured blue mussels in the last few years and publication of various studies addressing aspects of culturing and production, information with regard to the quality of cultured blue mussels at pre- and post-harvest stages is scarce and fragmented in the literature. In order to produce, process, package, transport, distribute, market, store and consume blue mussels with superior quality as well as to fill an important gap in the scientific literature regarding the quality of Newfoundland blue mussels, this research was designed to: (1) enumerate bacteria from cultured blue mussels from Newfoundland using different forms of agar; (2) evaluate changes in shell size, meat content, microbial quality, fatty acids, sterols and lipid composition of blue mussels during their growth at two aquaculture sites; (3) evaluate the effect of ice storage on proximate composition and quality of mussels; (4) assess the use of bacterial fatty acids as microbial quality indicators; and (5) examine the effects of mechanical handling and ascorbic acid treatment on lipid oxidation and quality of blue mussels. -- Results indicate that marine agar is better than plate count agar to evaluate microbial quality of bivalves. Ocean water temperatures at the aquaculture site affected chlorophyll a content or algae forms and their fatty acid compositions, as well as microbial quality of water, which in tum affected microbial quality, lipid and fatty acid composition, meat content and shell size of cultivated mussels. The measurement of n-3 polyunsaturated fatty acids (PUFA) and phytosterols in Newfoundland cultured mussels may add to there market value. Cultured mussels can reach their commercial size within a year following cultivation. Their optimum harvest time would be either spring or fall of each year. Meanwhile, microbial growth and lipid oxidation of ice stored mussels leads to their spoilage and an increase in flavor deterioration index. Conventional agar was the best substrate to monitor microbial changes during ice storage. Other potential indicators would be the bacterial fatty acids ai15:0, i17:0 or total bacterial fatty acids as determined by H₂SO₄-MeOH transmethylation reagent. Ice stored mussels were more susceptible to lipid oxidation than the fresh mussels as reflected in their high 2-thiobarbituric acid reactive substances (TBARS) values. However, the current rapid mechanized handling practice in the blue mussel industry, which includes washing, sorting, washing again and packaging, should not affect their oxidative status. Furthermore, exposing live blue mussels to specific concentrations of ascorbic acid may control lipid oxidation during their ice storage for only 5 days. Thereafter, the remaining ascorbic acid may become a pro-oxidant in ice stored mussels.


identifier: Khandwala, Hemal <https://research.library.mun.ca/view/creator_az/Khandwala=3AHemal=3A=3A.html>   (1997) A study of intrathecal strychnine-induced allodynia in the lightly anesthetized rat.  Masters thesis, Memorial University of Newfoundland.

abstract: Please see thesis for abstract.


identifier: Kharazi, Media <https://research.library.mun.ca/view/creator_az/Kharazi=3AMedia=3A=3A.html>   (2013) Designing and optimizing of concrete mix proportion using statistical mixture design methodology.  Masters thesis, Memorial University of Newfoundland.

abstract: The primary objective of this thesis is to investigate and explore the feasibility of using statistical mixture experimental design and analysis methods in the optimization of concrete mix proportion and the subsequent prediction of concrete properties. Designing a concrete mixture proportion, which contains several  components, such as cement and water content, coarse and fine aggregates, and various additives, to meet several performance criteria, can be a difficult and time-consuming task. -- A statistical mixture design approach, which provides a structured design matrix, provides a cost-effective means of concrete performance optimization. In this study, a statistical mixture approach based on an IV -optimal design was applied to investigate the effect of five mixture components (cement, water, coarse aggregates, fine aggregates, and admixture) on key performance criteria, which included the slump, 3-7-28- 56- and 91 - day compressive strengths, 3- 7- 28- and 56-day modulus of rupture and the modulus of elasticity. In total, 20 statistically designed concrete mixtures were cast to establish the prediction models for the several performance criteria. The models were developed for mixtures with 3 72 to 443 kg/m³ blended hydraulic cement, 155 to 164 kg/m³ water, 1066 to 1127 kg/m³ coarse aggregates, 671 to 736 kg/m³ fine aggregates, and 3.3 to 4.4 liters of high range water reducing agent. The accuracy of the prediction models were validated by confirmation tests for predicted concrete performance. The desirability function methodology was used for simultaneous optimization of multiple responses and determining the optimum binder combinations. -- The current research presents a procedure for the successful application of statistical mixture design methodology in concrete mix proportion. The procedure explained in the thesis can be used as a guideline for designing concrete mix proportion for different field application. -- As a secondary objective, the results of five mixtures with blended cement from part one, were compared with mixtures of similar proportions but made using ordinary Portland cement. The goal was to compare the differences in compressive strength, flexural strength, and modulus of elasticity gam with time. The results showed that the compressive and flexural strength of blended cement concrete were lower than ordinary Portland cement concrete at early ages. However, the blended cement concrete reached higher strength than conventional concrete after 28-day and onward. The type of cement had no significant effect on the modulus of elasticity.


identifier: Khazaei, Taraneh <https://research.library.mun.ca/view/creator_az/Khazaei=3ATaraneh=3A=3A.html>   (2012) Metadata visualization of scholarly search results.  Masters thesis, Memorial University of Newfoundland.

abstract: Studies of online search behaviour have found that searchers often face difficulties formulating queries and exploring the search results sets. These shortcomings may be especially problematic in digital libraries since library searchers employ a wide variety of information-seeking methods (with varying degrees of support), and the corpus to be searched is often more complex than simple textual information. To address these problems, an interactive Web-based library search interface is presented, which has been designed to support strategic retrieval behaviour of library searchers. This system takes advantage of the rich metadata associated with academic documents and employs information visualization techniques to provide searchers with additional information-seeking tools. These tools are designed to facilitate visual and interactive query refinement, search results exploration, and citation navigation. User evaluations illustrate the potential benefits of the design choices in comparison to a list-based digital library search interface.


identifier: Killen, Shaun S.  <https://research.library.mun.ca/view/creator_az/Killen=3AShaun_S=2E_=3A=3A.html>   (2007) The metabolic cost of behavioural tradeoffs during the early life stages of three north-Atlantic marine fishes.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: This thesis uses studies of physiology and behaviour to better understand the foraging and predator-avoidance tradeoffs experienced by young marine fishes. It has previously been speculated that, due to their small size and high growth rates, larval and juvenile fish may have a limited aerobic capacity compared to adult individuals. This could be an important constraint influencing the behavioural ecology of young fishes, but has been difficult to evaluate because there has been no single study to examine changes in metabolic rate or aerobic scope for any fish species over their entire life history. Thus, an important first step in this thesis was to examine the standard (minimal) metabolism, maximal metabolism, and aerobic scope for three species of north Atlantic marine fish (shorthorn sculpin Myoxocephalus scorpius, ocean pout Zoarces americanus, and lumpfish Cyclopterus lumpus) from the larval stage until adulthood. This research showed that young fish have a greatly increased mass-specific metabolic demand compared to adults, and that their aerobic scope is vastly diminished. The results also suggest that the relationship between aerobic scope and life history stage is greatly influenced by a species' developmental trajectory. -- A second group of projects then investigated the effects of increased mass-specific metabolic demand on anti-predator behaviour in young marine fishes. It is known that most animals will reduce foraging while in the presence of predatory threat, but that individuals are often more risky (i.e. they will continue to forage) during times when they are hungry or have increased energetic requirements. However, despite their high mass-specific energy demands, it was observed that young ocean pout and larval shorthorn sculpin both display large foraging reductions when exposed to predators. Due to the high energetic requirements of these fishes, these results suggest that these foraging interruptions could be very costly. To support this view, these studies also found that frequent, prolonged exposures to a predatory threat caused reduced growth, decreased lipid stores, and reduced ability to acquire certain essential dietary fatty acids that are crucial for normal development. -- A final study then examined how a limited aerobic scope may affect the choice of foraging strategy in young lumpfish - a species that can either actively forage by swimming, or use a "sit-and-wait" foraging strategy while clinging to the substrate using a ventral adhesive disc. Behavioural observations showed that lumpfish predominantly use the 'cling' foraging strategy when prey is abundant, but resort to the more costly 'swim' strategy to seek out food when prey is scarce. The metabolic cost of active foraging was also quantified using swim-tunnel respirometry, and a model was devised to predict the prey density at which lumpfish should switch between foraging modes to maximize energy intake. The results of this model do not agree with previous observations of lumpfish behaviour, and thus it appears that juvenile lumpfish do not try to maximize their net energetic gain. Instead, the data suggest that juvenile lumpfish forage in a manner that reduces activity and conserves space in their limited aerobic scope.


identifier: King, Amy Catherine <https://research.library.mun.ca/view/creator_az/King=3AAmy_Catherine=3A=3A.html>   (2013) Truth commissions as a tool for the political and legal recognition of women's rights in the postconflict state.  Masters thesis, Memorial University of Newfoundland.

abstract: Truth commissions may serve as a model for the introduction or strengthening of women's rights in states where recognition has not historically been a priority. As evidence for the argument that truth commissions can play an important role in reinforcing women's rights in post-conflict states, I examine the case studies of Liberia and South Africa, and include a chapter advancing a normative argument for transitional justice in general, and truth commissions in particular, as a means of strengthening human rights practice. This paper adds to the existing transitional justice literature by examining the impact of truth commissions on the development of women's rights in the post-conflict state.


identifier: King, Karlie <https://research.library.mun.ca/view/creator_az/King=3AKarlie=3A=3A.html>   (2006) Alternative medicine as modern magic: a study of spiritual manual techniques.  Masters thesis, Memorial University of Newfoundland.

abstract: Spiritual manual techniques are a type of Alternative Medicine. This thesis demonstrates that these techniques are comparable to magic (even though eight practitioners who administer these techniques do not consider them to be magic) for four main reasons. One, in both, the sacred is spoken of in the same regard. Further, it is approached in the same manner. Three, both magic and spiritual manual techniques necessitate a similar frame of mind. Four, a magical rite and a spiritual manual technique treatment are carried out in a similar fashion, and for the same purposes. This demonstration-that spiritual manual techniques are a contemporary form of magic – counters academic claims that magic is a thing of the past. In contrast to this claim, this thesis demonstrates that magic is well-suited for modernity, for the reason that magic mitigates the divide between science and religion, a divide which is constantly being reified in the present age.


identifier: King, Linda M. <https://research.library.mun.ca/view/creator_az/King=3ALinda_M=2E=3A=3A.html>   (2001) Report of a graduate internship on the roles and responsibilities of a middle school principal.  Masters thesis, Memorial University of Newfoundland.

abstract: This thesis has no abstract.


identifier: King, Maxwell S. <https://research.library.mun.ca/view/creator_az/King=3AMaxwell_S=2E=3A=3A.html>   (2005) Implementing problem solving in the intermediate mathematics classroom.  Masters thesis, Memorial University of Newfoundland.

abstract: A common definition of problem solving, a problem for which a procedure or algorithm is not initially known, emerges from the reviewed literature and its implications and application for the intermediate mathematics class are explored. Traditionally in Atlantic Canada, problem solving has not been implemented in the manner outlined in curriculum documents such as those developed from the standards established by the National Council of Teachers of Mathematics (NCTM). While the teaching of skills and strategies is important, in order to develop mathematical thinkers, teachers should consider using problem solving as a part of the classroom practice to assist in the development of mathematical thinkers. Unfortunately, many teachers at the interim are uncomfortable in using problem solving activities in the classroom. The literature identifies several aspects of successful problem solving environments that should be integrated into the mathematics classroom. Communication, both verbal and written, is an important component of the problem solving process as it provides students the opportunity to see alternate solutions and strategies as well as time to reflect on the problem solving process. Changes are suggested to offer some direction on the growing of 'best practices' for the integration of problem solving in the mathematics classroom.


identifier: King, Tasker <https://research.library.mun.ca/view/creator_az/King=3ATasker=3A=3A.html>   (1981) Developing a listening skills program for grade six pupils at Goulds Elementary School.  Masters thesis, Memorial University of Newfoundland.

abstract: The purpose of this study was to investigate the effect of a planned listening skills program upon a class of grade six pupils. It investigated (1) the effect of instruction upon the listening habits of pupils, (2) the effect of a listening program upon the listening-reading comprehension skills of pupils, and (3) the relationship between listening and other selected variables such as intelligence and sex. -- A review of the related literature has indicated that the listening habits and listening skills of pupils can be improved through instruction. Studies have also indicated that an improvement in listening comprehension also results in an improvement in reading comprehension. -- The listening skills program used in this study was developed by the intern utilizing the materials from the language arts curriculum and other sources in the school. The program consisted of thirty one-half hour lessons which focussed on the following specific skills: (1) following directions, (2) following sequence, (3) summarizing main ideas, (4) detecting main ideas and details, (5) recognizing cause and effect, (6) visualizing, (7) making inferences and drawing conclusions, (8) organizing and outlining, and (9) distinguishing fact from opinion. -- The study was carried out during the months of February, March and early April, 1980. The subjects included in the study were 29 grade six pupils. Their respective verbal I.Q. scores ranged from 70 to 140. -- The effectiveness of the program and the extent to which its purposes were attained were reflected in the formative evaluation that took place during the program, and the summative evaluation which took place at the end of eight weeks. -- The formative evaluation revealed that the children became aware of the importance of listening in their daily lives and the need for good listening habits. A noticeable improvement in their listening habits and attitudes was seen by the end of the program. -- The summative evaluation revealed that there were significant gains in the listening and reading scores. The findings also revealed that there is a strong relationship between listening and intelligence. Pupils with higher verbal I.Q. experienced the greatest overall gain after they had received instruction. The study did not, however, show a distinction between the listening abilities of boys and girls. -- It was recommended that teachers explore the feasibility of developing their own listening instruction programs for skills in which pupils are found to be weak, using the materials from the language arts curriculum and other sources in the school.


identifier: Kirby, Natasha <https://research.library.mun.ca/view/creator_az/Kirby=3ANatasha=3A=3A.html>   (2006) Dynamical systems models of asset pricing.  Masters thesis, Memorial University of Newfoundland.

abstract: In this thesis we study asset pricing models using a dynamical systems approach. We first review the literature on current dynamical systems models of asset pricing. The foundation of these models is the fact that they incorporate heterogeneous beliefs among traders. Two main trader groups are discussed, fundamental traders and trend-chasing chartists. The theory of discrete dynamical systems, or maps, is also explored, and in depth analysis of these models is carried out. We modify a model of Chiarella, Dieci and Gardini to incorporate a third group of traders called contrarian chartists. The main idea surrounding contrarian chartists is that they not only disagree with the majority of traders, but they choose when to act on the disagreement in order to make a profit. A second case of this model is also discussed, where contrarian chartists are thought to always disagree with the majority. This case reduces to the literature model with one different parameter value. In each case, the model consists of a system of two difference equations. The first equation represents the logarithm of the asset price at any given time t, and the other represents the expectation of price change from one time period to the next. This system exhibits complicated behaviour including local behaviour such as period-doubling and Neimark-Sacker bifurcations as well as local attractors, global bifurcations and chaos. The results in terms of asset prices are also included for these models. The thesis concludes with some limitations and suggestions for future research.


identifier: Kirby, Trina Maxine <https://research.library.mun.ca/view/creator_az/Kirby=3ATrina_Maxine=3A=3A.html>   (2005) The functional analysis of the ocean pout (Macrozoarces americanus) type III antifreeze protein gene promoter.  Masters thesis, Memorial University of Newfoundland.

abstract: The full length ocean pout antifreeze gene promoter and a series of promoter deletion constructs were fused to the luciferase reporter gene, and their transcriptional role was examined in a transient expression assay by transfection into three cell lines; a human epithelial (CRL-1578), a human fibroblast (HTB-92) and a Chinook salmon embryonic cell line (CRL-1691). The studies demonstrate that the ocean pout AFP gene promoter can function in both mammalian and fish cell lines and that they contain both positive as well as negative regulatory regions. This indicates that the AFP gene may be regulated at various sites. -- In previous studies, a fish antifreeze/ growth hormone chimeric gene construct opAFP-GHc2 was injected into Atlantic salmon eggs. Through PCR analysis it was found that this construct reorganized in the fish genome so that the beginning of the 5’ ocean pout AFP promoter end was linked to the 3' end of the AFP polyadenylation sequence. In my study, this reorganized transgenic promoter was also ligated to the luciferase reporter gene and examined in a transient transfection assay, which determined that this reorganized promoter had significantly less activity than that of the full-length intact promoter. However, promoter activity was detected in all three cell lines which indicates that the transgene should be expected to express growth hormone in vivo.


identifier: Kisembe, Evelyne <https://research.library.mun.ca/view/creator_az/Kisembe=3AEvelyne=3A=3A.html>   (2005) A linguistic analysis of Luyia varieties spoken in western Kenya.  Masters thesis, Memorial University of Newfoundland.

abstract: The Luyia people identify themselves as a group that uses the language Luyia. However, there are significant linguistic differences among the speakers, a situation described as the existence of Luyia dialects. The sound realizations differ in each variety, a condition that the Luyia speakers themselves are aware of. Hence they talk of speakers of other varieties as having a characteristic articulation of a particular sound. These differences are a result of the way in which each Luyia variety has developed from the proto-language, Proto-Luyia. The Luyia varieties show a high degree of correspondence at all levels, but differ one from another to the extent that a separate treatment of each variety could be justifiable. At the phonological level for instance, a majority of the phonological correspondences appear to be regular and predictable. However, there exist some sound differences that are quite distinct because of processes such as Bantu Spirantization, Dahl's Law and the Luyia Law, which operate differently. Therefore, attempts at a rigid classification of Luyia varieties based on the status of these processes are likely to fail. The results indicate that Bukusu, Kabras, Wanga, Xaayo, Marachi, Saamia and Kisa attest Bantu Spirantization. These varieties represent the northern and central varieties of the geographical classification of Luyia varieties. Dahl's Law occurred across Luyia, but its results are complicated by the later application of the Luyia Law that obscures the results of Dahl's Law. The trigger consonants for Dahl’s Law in Luyia include p, t, and k, which affect p, t, and k as target consonants in Logooli, and affect only t in Xaayo, Marachi and Saamia . The Luyia Law is attested across Luyia except in Logooli where it is not attested and in Saamia where it is not uniform. Saamia shows the Luyia Law for *p, *k and *g, but not for *t.


identifier: Kletz, Selwyn John. <https://research.library.mun.ca/view/creator_az/Kletz=3ASelwyn_John=2E=3A=3A.html>   (1970) An analysis of the labour supply data to test the plausibility of the application of the Lewis growth model in Newfoundland.  Masters thesis, Memorial University of Newfoundland.

abstract: The purpose of this study is to determine whether the labour supply of Newfoundland meets the requirements of the Lewis Growth Model. The main objective is therefore not to determine whether the policy implications of the Lewis model are relevant to Newfoundland, but to determine whether it can be applied in the province under existing labour supply conditions. The introduction is used to define the concepts which are used, to outline the scope of the thesis, and to briefly summarize and criticize the Lewis model. Chapter II analyses the quantitative aspects of the Newfoundland labour supply, while chapter III is used to inquire into the qualitative aspects of the labour supply. The task set in chapter IV is to determine whether a surplus labour force does exist in the province, whether the wage rates are indeed low, and whether the productivity of labour has risen during the past few years. -- The general conclusion is that the labour supply of Newfoundland does meet the requirements of the Lewis Growth Model, for neither the quantitative nor the qualitative aspects of the labour supply contradict the ground rules of the model. However, a brief analyses of the model itself, in the appendix, points to a few shortcomings of the model, and therefore to the inadvisability of applying the model to Newfoundland.


identifier: Korabel, Vasily N. <https://research.library.mun.ca/view/creator_az/Korabel=3AVasily_N=2E=3A=3A.html>   (2005) Vortical structures generated by a localized forcing.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Vortex structures (monopoles, dipoles, quadrupoles) as well as more complex structures (vortex streets) are fundamental elements of geophysical turbulence. Because they can effectively transport momentum, heat, salt and biochemical products, they play an essential role in ocean dynamics. Organized vortex structures are a well-known feature of quasi-two-dimensional flows where motion in one direction is suppressed due to one of the following physical mechanisms: background rotation of the system, density stratification or geometrical restrictions such as for the flows in thin layers or soap films. -- Vortex dipoles are formed in a viscous fluid when a force is applied locally to some volume of fluid. If the force acts impulsively, a translating vortex dipole is generated. If the force starts at t = 0 and then acts continuously a starting jet with a dipole at its front is generated. Solutions for unsteady viscous flows generated by the action of continuous or impulsive localized forces are obtained in Oseen approximation. The solutions are compared with direct numerical simulations of vortex dipoles as well as with laboratory experiments. The comparison shows good quantitative agreement in both cases. -- A physical problem where the localized force acting continuously on fluid is placed in a uniform stream is equivalent to a problem of a fixed body in a uniform stream, while the couple of forces acting in opposite direction are equivalent to the problem of self-propelled body moving at constant velocity through a fluid. The solutions for the two-dimensional far-field wake are obtained in both cases. At a certain Reynolds number, wakes become unstable and form vortex streets. New series of high-resolution 2D numerical simulations is performed to study the characteristics of the wakes including the shedding frequency for a wide range of control parameters such as translational velocity, magnitude and spatial extent of a localized force. The results of numerical experiments of unsteady wake flow show existence of a great variety of flow regimes and are in good qualitative agreement with laboratory experiments.


identifier: Korneski, Kurt <https://research.library.mun.ca/view/creator_az/Korneski=3AKurt=3A=3A.html>   (2004) Liberalism in Winnipeg, 1890s-1920s: Charles W. Gordon, John W. Dafoe, Minnie J.B. Campbell, and Francis M. Beynon.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: During the first quarter of the twentieth century Canadians lived through, were shaped by, and informed the nature of a range of social transformations. Social historians have provided a wealth of information about important aspects of those transformations, particularly those of "ordinary" people. The purpose of this thesis is to provide further insight into these transitions by examining the lives and thoughts of a selection of those who occupied a comparatively privileged position within Canadian society in the early twentieth century. More specifically, the approach will be to examine four Winnipeg citizens - namely, Presbyterian minister and author Charles W. Gordon, newspaper editor John W. Dafoe, member of the Imperial Order Daughters of Empire Minnie J.B. Campbell, and women's page editor Francis M. Beynon. -- In examining these men and women, what becomes evident about elites and the social and cultural history of early twentieth-century Canada is that, despite their privileged standing, they did not arrive at "reasonable" assessments of the state of affairs in which they existed. Also, despite the fact that they and their associates were largely Protestant, educated Anglo-Canadians from Ontario, it is apparent that the men and women at the centre of this study suggest that there existed no consensus among elites about the proper goals of social change. Nevertheless, although their divergent experiences of the social order translated into a variety of aims and perspectives, what bound these people together was an acceptance of central liberal ideals and assumptions. That this broad concurrence existed, and that the men and women at the centre of this study were part of a community that could bring considerable politico-economic pressure to bear in seeking to realize their envisioned future, is significant. What is of particular importance is that, even though the social reality that came to exist was not exactly like that which any of these men and women envisioned, it was the broad commonalities running through their diverse imaginings that informed the overarching shape of social relationships in the post-World War I period in Canada.


identifier: Kozarski, Natasa <https://research.library.mun.ca/view/creator_az/Kozarski=3ANatasa=3A=3A.html>   (2005) Importance of strain hardening in plastic response of rectangular beams subjected to bending loads.  Masters thesis, Memorial University of Newfoundland.

abstract: The object of this thesis is to investigate the influence of linear strain hardening on plastic flexure of rectangular beams for various boundary conditions. This is one step towards understanding post yield plastic behavior of ship frames. Solutions for six different boundary conditions have been obtained: for simply supported beams centrally or uniformly loaded, cantilever beams with a point load at the end or uniformly loaded and fixed beams centrally or uniformly loaded. These solutions give deflection for any load level. Finite element analyses are used to verify these analytical solutions. In general there is high level of agreement between theoretical and ANSYS solution. The experimental work gave qualitative validation of post yield plastic behavior of ship frames. Load deflection curves showed obvious transition from linear to non-linear behavior and rise of the curve in plastic domain.


identifier: Kraft, Scott W. <https://research.library.mun.ca/view/creator_az/Kraft=3AScott_W=2E=3A=3A.html>   (2003) Genetic and clinical profile of the spinocerebellar ataxias followed in the Calgary Movement Disorders Clinic.  Masters thesis, Memorial University of Newfoundland.

abstract: The adult onset spinocerebellar ataxias are a genetically and clinically heterogeneous group of neurodegenerative disorders. The relative frequencies of these disorders vary within different ethnic groups and geographical locations. We sought to identify the relative frequencies of these disorders in the Calgary Movement Disorders Clinic, as well as to determine the proportion of patients that have a positive family history and to determine the diagnostic utility of genetic testing in individuals with and without family members with similar symptoms. -- A retrospective chart review of individuals given a clinical diagnosis of adult onset spinocerebellar ataxia in the Calgary Movement Disorders Clinic was carried out. Testing for SCA types 1, 2, 3, 6, 7, and 8 as well as Friedreich's Ataxia and the fragile X premutation tremor/ataxia syndrome was performed on at least one member of each family. -- A total of 69 patients in 60 families presented with an adult onset progressive ataxic disorder. Twenty-one (35.0%) of the families had a pedigree suggestive of an autosomal dominant disorder. An apparent autosomal recessive pattern of inheritance was present in 3.3%. A positive but undefined family history was noted in 15.0%. Sporadic disease appeared to be present in 43.3%. Two patients (3.3%) were adopted. The most commonly found mutation in the autosomal dominant families was SCA3 (5 families - 23.8%). This was followed by SCA2 (3 families - 14.3%) and SCA6 (2 families - 9.5%). The SCA1 and SCA8 expansions were only identified in 1 family (4.8%) each. Although the family history was suggestive of a dominant disorder, one patient was found to have Friedreich's Ataxia. A patient in one of the two autosomal recessive appearing families tested positive for Friedreich’s ataxia. One individual (11.1 %) with a positive but undefined family history tested positive for SCA6. A single sporadic patient had a positive test which was SCA3. Neither of the two adopted patients had a positive test. DRPLA testing was performed on 21 of the families and no positive tests were found. No expansions of the fragile X mental retardation gene were found. -- A positive test result was found in 61.9% of autosomal dominant pedigrees, 50% of autosomal recessive pedigrees, and 11.1% of patients with positive but undefined family histories. Of the sporadic patients only 1 of 26 (3.8%) was found to have a positive genetic test. -- SCA3 is the most common mutation found in our clinic patients followed by SCA2 and SCA6. A positive test result is uncommon in individuals without any family history of a similar disorder. The fragile X tremor/ataxia syndrome was not identified in our SCA patient population.


identifier: Kramer, Jamie M. <https://research.library.mun.ca/view/creator_az/Kramer=3AJamie_M=2E=3A=3A.html>   (2005) Analysis of the forkhead box subgroup 'O' (FOXO) family of transcription factors and the toxic effects of Ga14 in Drosophila melanogaster.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: The insulin signalling pathway provides a conserved mechanism used by metazoan animals to regulate growth, metabolism, and behaviour in response to environmental cues. The FOXO transcription factors regulate cellular function in the presence of low levels of insulin signalling. This thesis describes the identification of the Drosophila melanogaster homologue of FOXO (dFOXO), that has high sequence conservation in the forkhead box DNA binding domain and Akt phosphorylation sites, when compared to analogous genes in mice, humans, and Caenorhabiditis elegans. Overexpression of dFOXO in the developing eye leads to a characteristic phenotype resulting from growth reduction. This phenotype can be rescued by co-expression of upstream PI3K signalling components, unless FOXO is mutated to be non-responsive to Akt phosphorylation. Ubiquitous expression of dFOXO at different stages of larval development closely replicates the effects of starvation, and endogenous dFOXO activity is modulated by the presence of nutrients. These results suggest that dFOXO is important for the response of Drosophila larvae to starvation. Analysis of dFOXO loss of function suggests that dFOXO is required for the adaptation of young larvae to starvation, but is not required during starvation in the later stages of larval development. A role for dFOXO in larval wandering is suggested by the observations that loss of dFOXO leads to reduced height of pupation, overexpression of dFOXO induces wandering, and endogenous dFOXO activity is increased during the wandering stage of the larval life cycle. In summary, dFOXO may regulate growth, behaviour, and starvation resistance in response to reduced PI3K signalling in Drosophila. -- Studies in Chapter 1.2 utilize the UAS/Gal4 ectopic expression system. We have shown that Gal4 causes a rough eye phenotype in adult flies when expressed at high levels during eye development. The rough eye phenotype is characterized by a loss of ommatidial organization and is accompanied by a high level of apoptosis in the eye imaginal discs where Gal4 is expressed. These phenotypes are essentially eliminated through co-expression of the caspase inhibitor, p35. This suggests that Gal4 has the capability to act as a toxic protein that activates the cellular apoptotic machinery. These results should be taken into consideration in the design and analysis of any experiment involving the use of the UAS/Gal4 system.


identifier: Krishnasamy, Loganathan <https://research.library.mun.ca/view/creator_az/Krishnasamy=3ALoganathan=3A=3A.html>   (2004) The implementation of a risk based maintenance policy to a power plant.  Masters thesis, Memorial University of Newfoundland.

abstract: The unexpected failures, the down time (outage) associated with such failures, the loss of production of power and, the higher maintenance costs are major problems in operation of thermal power plants. The unexpected failure of an equipments and systems causes economic risk and can be minimized using an effective maintenance strategy. The risk based approach ensures a strategy, which is cost effective. Such an approach uses the information obtained from the study of failure modes and their consequences. -- The purpose of the thesis is to develop and show how to implement a risk based maintenance (RBM) policy to a power plant. This quantitative approach will provide a basis for selection of the best alternative strategy to minimize the risk resulting from breakdowns or failures. -- The proposed methodology is comprised of three modules: risk assessment, risk evaluation, and maintenance planning. This work presents a mechanism for the study of the occurrence of failures and functional failures in equipment and the severity of their consequences, known as risk. Maintenance of equipment is prioritized based on the risk, and the reduction in overall risk of the plant is accomplished by focusing on the maintenance of high-risk items first. To the author's knowledge this quantitative approach has not been developed before. -- The study is conducted for Newfoundland and Labrador Hydro, Holyrood thermal power generation plant. Failure data is collected from the existing power station (Unit 3-150 MW) over a period of twelve years. The data is modeled using Weibull and Exponential distributions to estimate the parameters. A probabilistic risk analysis is performed to quantify the risk at the plant. An acceptable risk criterion is determined and the major systems and subsystems that are found to have a risk higher than acceptable risk are identified. The maintenance interval is calculated by reverse or target probability analysis for reducing the level or risk resulting from the failure of a system. -- To conclude, the risk based maintenance strategy can be employed to prioritize the systems for maintenance planning, and to improve the existing maintenance policies. In addition, this strategy provides cost-effective means for maintenance as well it minimizes the consequences (safety, economic and environment) related to a system failure.


identifier: Krol, Carol Frances <https://research.library.mun.ca/view/creator_az/Krol=3ACarol_Frances=3A=3A.html>   (1986) Middle Dorset settlement-subsistence patterns in western Newfoundland: a view from Broom Point.  Masters thesis, Memorial University of Newfoundland.

abstract: The reconstruction of Middle Dorset settlement-subsistence patterns along the west coast of Newfoundland's Great Northern Peninsula has been hampered in the past by lack of information concerning variation in site types. Research has tended to concentrate on the intensive investigation of a single site type, the large semi-permanent base camp, and little is known about the smaller Middle Dorset sites of an apparently temporary or seasonal nature that exist in the region. -- Recent excavations at Broom Point, a small seasonal Palaeo-Eskimo site located in Gros Morne National Park, have succeeded in identifying at least two separate short-term Middle Dorset occupations in addition to an earlier, small Groswater phase component. The most prominent activity reflected in the Middle Dorset artifact assemblages from Broom Point relates to the manufacture and maintenance of stone tools, from the initial reduction of raw material (represented by a variety of local cherts) to the final stages of tool production. Other extractive pursuits, primarily marine related, and processing activities are also represented at the site, and seasonality is suggested as “non-winter,” with Broom Point likely representing a repeatedly occupied summer site. -- With regard to Middle Dorset settlement-subsistence patterns along the west coast of the Northern Peninsula, it is postulated that Middle Dorset populations in this region of Newfoundland represent northern coastal hunter-gatherers, characterized by a settlement pattern that includes the establishment of semi-permanent base camps, from which a seasonal departure of at least a portion of the population took place in the summer to small, more mobile camps along the coast (in response to a combination of ecological as well as cultural factors), with populations returning to the large semi-permanent bases in the fall. It is suggested that Broom Point represents such a seasonal site, although the exact location of the large semi-permanent site that it was connected to is unknown at present.


identifier: Krukoff, Teresa Louise <https://research.library.mun.ca/view/creator_az/Krukoff=3ATeresa_Louise=3A=3A.html>   (1982) A study of the metabolic development in the nucleus tractus solitarius in normotensive and hypertensive rats.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: The nucleus tractus solitarius, a nuclear column in the medulla oblongata, plays an important role in cardiovascular regulation. In particular, the subnuclei nucleus commissuralis (NC) and nucleus medialis (NM) have been implicated to be the sites of this regulation. The ontogeny of the metabolic requirements in these subnuclei studied in the postnatal Wistar-Kyoto rat (WKY) using the ³H-2-deoxy-o-glucose (³H-2DG) autoradiography technique. The metabolic development of the same subnuclei was then studied in the spontaneously hypertensive rat (SHR) in which a state of elevated blood pressure is genetically triggered to determine if the metabolic requirements within the NC and NM are altered during the development of hypertension. -- It was found that the metabolic requirements in the NC and NM of the WKY were not constant between 2 and 12 weeks of age. A high level of metabolic activity at 2 and 8 weeks was contrasted by a lower level at 4 and 12 weeks. The same trends of metabolic requirements found in the normotensive rats were found in the SHRs; however, the relative metabolic activity in the NC of 2 and 4 week SHRs was significantly higher than in the normotensive rat. -- To extend the developmental studies and to examine the possibility that structural differences in the NC and NM between the two strains were responsible for the differences observed in the metabolic requirements in the NC of young hypertensive rats, the exchange vessel densities and neuronal densities in the two subnuclei were quantitated. -- No differences in exchange vessel densities were found in the NC and NM between 4- and 12-week-old rats, between the NC and NM at either age, or between WKYs and SHRs. -- Neuronal densities in the NM were generally higher than in the NC of both WKYs and SHRs. Densities in the two subnuclei of WKYs decreased linearly as the rats matured. In the SHRs as compared to the WKYs, the densities of neurons were significantly higher in the NM and NC, beg inning at 4 and 8 weeks, respectively. -- Therefore it has been found that the metabolic activity in the NC and NM of WKYs and SHRs is not constant between 2 and 12 weeks of age. Significantly higher energy requirements were found in the NC of prehypertensive SHRs which were not related to differences in exchange vessel or neuronal densities.


identifier: Kubota, Mami <https://research.library.mun.ca/view/creator_az/Kubota=3AMami=3A=3A.html>   (2005) The quest for wholeness: Schiller's concept of alienation revisited.  Masters thesis, Memorial University of Newfoundland.

abstract: This thesis examines Schiller's Letters on the Aesthetic Education of Man, and revisits his concept of alienation, a key to understanding his controversial rhetoric. I argue that his terminology - in which words have many meanings - may be understood in light of his dualistic view of humanity and his historical view of human progress. In his view of dualism and dialectic progress, Schiller sees either a fragmented or united human condition, and changes the meaning of his words depending on which era or state he is discussing. He holds that the aesthetic (holistic) education of man is vital in overcoming alienation, and contends we should use what he calls the play drive, a mental state equidistant from sense and reason, in all aspects of life, just as artists do when realizing the combination of mind and matter. For Schiller, ultimate social reform must start from the foundation of such a synthesized psyche, since this is the only way to build the bridge between the ideal and real, to realize humanity's dreams of freedom.


identifier: Kumar, Lokesh <https://research.library.mun.ca/view/creator_az/Kumar=3ALokesh=3A=3A.html>   (2013) Design, synthesis and in-vitro evaluation of thiazeto [2, 3-α] quinolones as potential bioactive molecules.  Masters thesis, Memorial University of Newfoundland.

abstract: The varied nature of biological profiles of the quinolone scaffold has attracted researcher's interests in exploring novel quinolone-based compounds. Novel quinolone derivatives are designed to overcome unwanted effects such as bacterial resistance, toxicities and side effects of existing molecules. Based on understanding of mechanism of action of quinolones, while their side effects, profile, bacterial resistance and efficacy may be altered. -- Among the newly synthesized biologically active polycyclic quinolones, the sulfur containing polycyclic quinolone nuclei such as thiazolo-, thiazeto- and thieno-derivatives are of biological interest. While there are numerous research reports available on various polycyclic quinolones, for instance 4-oxo-thiazolo [3,2-α] quinoline-3- carboxylic acid derivatives, 4-oxo-thieno [3,2-α] quinoline-3-carboxylic acid derivatives etc., there are very few studies reported for the 4-oxo-thiazeto [3,2-α] quinolines. The work presented in this thesis was performed in order to discover novel 4-oxo-thiazeto [3,2-α] quinolone derivatives with potential antibacterial activity, focusing on activity against resistant bacterial strains. This work traverses from design and synthesis of a series of 4-oxo-thiazeto [3,2-α] quinoline derivatives to their in vitro evaluation for microbiological activity, and finally ends with docking studies. Unfortunately, the antibacterial activity of the synthesized compounds was insignificant. Thus, in order to comprehend the mechanism behind the insignificant antibacterial activity, docking studies were performed on the DNA gyrase enzyme for a certain compounds. -- The results obtained from docking studies showed that the synthesized 4-oxo-thiazeto [3,2-α] quinolone derivatives could interact with the DNA gyrase enzyme, forming reversible binding interaction with the various domains of this enzyme, while other reported active antibacterial compounds from this class bind irreversibly with the ATP binding site.


identifier: Kuo, Ching-Zhy <https://research.library.mun.ca/view/creator_az/Kuo=3AChing-Zhy=3A=3A.html>   (1970) Collision-induced 1st overtone infrared absorption band of deuterium.  Masters thesis, Memorial University of Newfoundland.

abstract: The collision-induced 1st overtone infrared absorption band of deuterium was observed at room temperature. The band was studied in the pure gas and in binary mixtures with argon and nitrogen at a path length of 194.3 cm at pressures up to 800 atm. The observed absorption profiles of the band do not show any splitting of the Q branch and this indicates that the contribution of the short-range overlap forces to the intensity of the band is negligible.  The enhancement absorption profiles of D₂-AR mixtures show only single-transition quadrupolar lines. But the enhancement profiles of D₂-N₂ mixtures, in addition, show the double transitions Q₂(J) of D₂ + S₀(J) of N₂, and double vibrational transitions Q₁(J) of D₂ + Q₁(J) of N₂ which occur on the low frequency side of the pure overtone band. Major contribution to the intensity of the absorption profiles of pure deuterium comes from the double transitions Q₂(J) + S₀(J) and Q₁(J) + Q₁(J) in the colliding pairs of D₂ molecules. Integrated absorption coefficients were measured and binary and ternary absorption coefficients were derived. -- The observed enhancement absorption profiles of D₂-Ar and D₂-N₂ were analyzed by a computational procedure into their component lines to yield values of the half widths δs. The analysis of the profiles of D₂-Ar confirmed the fact that the contribution of the overlap forces to the intensity of the band is negligible. From the analysis of the pure overtone profiles of D₂-N₂, the contribution of the double transitions, Q₂(J) of D₂ + S₀(J) of N₂, to the intensity of the band was estimated. The quadrupole moment of the nitrogen molecule was obtained as 1.14 ea²₀ from the ratio of the binary absorption coefficients of the band due to single and double transitions.


identifier: Kurtbogan, Bahar <https://research.library.mun.ca/view/creator_az/Kurtbogan=3ABahar=3A=3A.html>   (2013) Neogene sedimentary history of the Cilicia Basin, eastern Mediterranean.  Masters thesis, Memorial University of Newfoundland.

abstract: The Miocene to Recent tectonic evolution of the Cilicia Basin near the present day mouth of the Goksu River is studied using 2000 km of high resolution 96-channel seismic reflection profiles collected in 2008 using the RV Koca Piri Reis of the Institute of Marine Sciences and Technology. Our project is intended to provide a history of deposition in one of the ultimate sinks: the eastern Mediterranean. We mapped the distribution of sediment deposits and delineated the structures that developed in the Cilicia Basin precisely in space and time. The focus of this research is on the basin-wide structures that developed near the Turkish continental slope and extend through the entire Cilicia Basin. -- Detailed interpretation and mapping of the seismic reflection profiles showed that during the Miocene a major south- and southeast-verging fold-thrust belt developed across the entire Cilicia Basin. The leading portion of this fold-thrust belt is well imaged in the Inner Latakia Basin, south east of the present-day Misis-Kyrenia Fault Zone. The trailing portion of the fold-thrust belt is believed to constitute the thrust panels which form the core of the central Taurus Mountains of southern Turkey. A north- and northwest-verging fold-thrust belt is locally mapped in the Outer Cilicia Basin. The belt is overprinted by smaller positive flower structures all soling into the primary thrust surface(s), and showing tip points extending to the depositional surface. This structural architecture suggests that they are developed within a transpressional regime during the Pliocene Quaternary. Seismic stratigraphic correlations with deep offshore exploration wells provided the chronology for the seismic data. A thick evaporite succession is unconformably deposited over deeper portions of the fold-thrust belt. This evaporite succession presently forms numerous salt pillows and salt rollers in Inner Cilicia Basin, and salt diapirs and salt walls in the Outer Cilicia Basin. -- Detailed mapping showed that Miocene contraction was followed by partitioned contraction and extension that is related to strike-slip fault activity along the Kozan Fault Zone, a major splay from the East Anatolian Transform Fault. Our results show that Pliocene-Quaternary extension occurs within the basin contemporaneously with the contractional or transpressional structures along the southern margin of the basin. A specific problem that is addressed in this study is to understand the relationship of contemporaneous contractional to extensional deformation in the study area.


identifier: Lafferty, Anne <https://research.library.mun.ca/view/creator_az/Lafferty=3AAnne=3A=3A.html>   (2011) Male and Female. In a pair: the emotional atmosphere following a death and its intersection with gender and with public and semi-public space in Newfoundland through the 1960s and 1970s.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: This thesis considers the emotional atmosphere in the first few days following a death and the customs that expressed and partially created that atmosphere in Newfoundland, during the twentieth century, up through the demise of the house wake. Geographically, the thesis focuses primarily on the areas where I did fieldwork, St. John’s, the Bay Roberts area, and two Northern Peninsula communities, Conche and St. Lunaire-Griquet. -- I examine solemnity, sorrow, and revelry, which were important components of the emotional atmosphere, and focus on one particular custom for each: the funeral procession for solemnity, crying and lamentation for sorrow, and party behaviours at wakes for revelry. I analyse the ways in which these customs intersected with gender and with the use of public or semi-public space. In St. John’s and sometimes in the Bay Roberts area, one of the most public aspects of death rites, the funeral procession, excluded women. In many rural areas, however, both sexes were included, and the structure of the procession often highlighted the participation of both genders. -- Similarly, there was considerable variation in how much expression of grief was acceptable. In St. John’s stoicism was valued, but in rural areas intense emotional expression was often expected. No matter what the local customs, women usually had more leeway than men to express grief. Emotion might be expressed both in semi-public areas, such as the church and graveyard. When women were excluded from the procession, they thus were also excluded from the most public expressions of sorrow.  -- Typically, both men and women took part in wakes, but they sometimes behaved quite differently. In communities with significant revelry, men were more active participants in some aspects of partying. They appear to have often been the most dominant and noticeable participants in the semi-public context of the home wake during the night. -- The gendered variations of these customs reflected differing ideas about not only appropriate demeanour and emotional expression, but also men’s and women’s roles in society, particularly their places in the public sphere.


identifier: Lagu, Sharadchandra Gopal <https://research.library.mun.ca/view/creator_az/Lagu=3ASharadchandra_Gopal=3A=3A.html>   (1968) Electric quadruple interaction of the oxygen molecule.  Masters thesis, Memorial University of Newfoundland.

abstract: The intrinsic absorption coefficient of the oxygen molecule for the fundamental vibrational band has been calculated, assuming an electric quadrupole interaction of the molecule with the incident radiation. The quadrupole matrix elements are approximated by a cubic equation in r = R - Re, where 'R' is the internuclear distance and 'Re' is its equilibrium value. The wave function of the ground state of the oxygen molecule is written in the Born-Oppenheimer approximation, as a product of electronic and nuclear parts. Completely antisymmetrized orthogonalized molecular orbital wave functions are taken for the electronic part, while the nuclear part of the wave function is written as a product of rotational and vibrational wave functions. The simple harmonic wave functions are the taken for the vibrational part. -- The integrated absorption coefficients for O, Q and S branches and the total integrated absorption coefficient for the whole band, have been calculated. The results due to Bishop, Shapiro and the present investigation are as follows: -- Integrated absorption coefficient em⁻²/amagat -- Bishop 2.3 ± 0.9 X 10⁻³ -- Shapiro 3.0 ± 0.23 x 10⁻⁴ -- Present 1.45 x 10⁻⁴ -- These results are discussed at the end.


identifier: Laidley, David T. <https://research.library.mun.ca/view/creator_az/Laidley=3ADavid_T=2E=3A=3A.html>   (2005) Increased behavioural and histological variability arising from changes in cerebrovascular anatomy of the Mongolian gerbil.  Masters thesis, Memorial University of Newfoundland.

abstract: The bilateral common carotid artery occlusion (BCCAO) in the Mongolian gerbil has been used as a simple and highly reproducible model of forebrain ischemia due to an incomplete circle of Willis. However, increased behavioral and histological variability to a typical 5 min period of ischemia in this modelled us to conclude that the vasculature was changing. To test this hypothesis I compared gerbils from two Canadian suppliers. Gerbils from Charles River (CR) exhibited a greater incidence of complete or partial circle of Willis compared to their High Oak (HO) counterparts. This altered vasculature pattern in the CR versus HO gerbils was associated with reductions in behavioral activation that characteristically accompany conditions of milder ischemia resulting in less severe hippocampal CA1 cell loss (e.g. ~70% CA1 cell loss vs. 95% CA1 loss). -- Gerbils from CR, the main supplier in North America, no longer represent a reliable model for use in forebrain ischemia studies. Gerbils from HO while superior to those from HO are also more variable in their response to BCCAO than those used as recently as 5 years ago. Thus the gerbil model of forebrain ischemia, at least using CR animals, no longer produces consistent injury and behavioral alterations. Investigators are urged to consider adopting other models in future neuroprotection studies or ensure that their gerbil population lacks communicating arteries.


identifier: Lair, Catherine <https://research.library.mun.ca/view/creator_az/Lair=3ACatherine=3A=3A.html>   (2005) Internship report: Project Double Challenge, McGill University.  Masters thesis, Memorial University of Newfoundland.

abstract: This report is the result of a four month internship, the main goal of which was to evaluate a component of the professional preparation program run by McGill University for physical education and kinesiology students. The component evaluated, Project Double Challenge (PDC), was an on-campus requirement of McGill's adapted physical activity course EDKP 396 in which university students worked with individuals with a disability. These individuals were adults who came from l'Atelier le Fil D'Ariane, a tapestry workshop, and children and teenagers who came from REACH and Chambly Academy. Another goal was to suggest improvements to PDC to make it more relevant for both McGill and REACH students. Three types of investigation were completed. The first was a review of literature plus a series of interviews with REACH teachers; the second was an ongoing investigation that consisted of follow-up interviews with McGill students; the third was the distribution of questionnaires to REACH teachers and McGill students. The results show that PDC is a well run program. Since improvement is always possible, some tools designed to enhance communication between REACH and McGill were created. A series of 20 recommendations that emerged from the different investigations, and my personal experience throughout the internship, are presented.


identifier: Lake, Blue B. <https://research.library.mun.ca/view/creator_az/Lake=3ABlue_B=2E=3A=3A.html>   (2004) Patterning the embryonic brain: multiple signals converge to establish spatial identity within a neuromeric field.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Precisely arranged signaling events are required to establish the immense complexity of the embryonic central nervous system. During gastrulation, as the organizing mesendoderm endows neural identity on the overlying ectoderm, it concurrently initiates differential specification along the anterior-posterior (AP) neuraxis by antagonizing caudalizing signals. Upon completion of the embryonic germ layer rearrangements of the late gastrulae, the prospective neural plate shows primitive AP identity, which must be extensively rearranged and refined during neurula and tadpole stages by organizing centers occurring in adjacent tissues (mesendoderm and non-neural ectoderm) as well as within both the dorsoventral (roof plate and floorplate) and AP (anterior neural ridge and isthmic organizer) plane of the neurectoderm. Signals along both axes establish a grid-like network of gene expression providing the spatial cues for a cell to adopt its precisely choreographed differentiation program. Perturbations to components of this network result in severely abnormal phenotypes, thereby providing information on their function. I have utilized this approach to determine the requirements of both a Xenopus Rel/NF-κβ protein (Xrel3) and two novel components of the intracellular Wnt/β-Catenin signal transduction cascade (XPygo-2α/β) in morphogenesis of brain and optic vesicles. Xrel3 specifies both fore-midbrain and ventral identity of the nervous system by regulating otx2 and shh/glil gene expression, while both XPygo-2α and XPygo-2β mediate a late phase of Wnt signaling required to establish retinal and telencephalic domains of gene expression within the prospective forebrain.


identifier: Lambe, Dale <https://research.library.mun.ca/view/creator_az/Lambe=3ADale=3A=3A.html>   (2003) Media literacy and online learning.  Masters thesis, Memorial University of Newfoundland.

title: Media literacy and online learning

abstract: This study is an investigation of students' responses to media literacy and distance learning in Newfoundland's Secondary Language Arts Program. The postings of students relating to concepts of media literacy from several information sources constituted a majority of the data collection and analysis proceedings. Students' values and attitudes relating to both media literacy and online learning were derived from post-study questionnaires and interviews. -- Qualitative research methods were employed in this investigation. The study was designed as a case study of a particular site. My role as a teacher allowed me to offer my own insights thereby fulfilling elements of action research. Using the phenomenological practices of clustering I analyzed students' postings, questionnaires, and interview responses lead to a clustering of themes. The qualitative research software entitled Ethnograph 5.0 aided in this procedure. -- Structured questionnaires and semi-structured interviews and the subsequent transcriptions allowed a lot of issues and student perspectives relating to both media literacy and online learning to emerge effectively. -- It was concluded through this study that secondary students value the potential of online learning. The analysis of data provided several observations and insights about effective teaching models for the instruction of media literacy concepts. Although it was originally thought that the students would be apprehensive about adopting an online platform for learning, the ensuing results were favourable in this research study.


identifier: Lambo, Adewale Jibowu <https://research.library.mun.ca/view/creator_az/Lambo=3AAdewale_Jibowu=3A=3A.html>   (2006) Characterization of the temperature dependent catabolism of 2,4'-dichlorobiphenyl by a polychlorinated biphenyl degrading psychrotolerant Hydrogenophaga sp. IA3-A.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: A biphenyl-utilizing bacterium isolated from polychlorinated biphenyls (PCBs)-contaminated soil grew on tryptic soy or biphenyl at 4 to 40°C and at 5 to 35°C, respectively. Though the bacterium utilizes selected aromatic compounds as sole carbon and energy source, it only cometabolized chlorinated biphenyls. Analysis of the profile of cellular fatty acids showed that the bacterium is most closely related to Hydrogenophaga taeniospiralis (Willems et al., 1989). The gram-negative rod, tentatively identified as Hydrogenophaga sp. IA3-A, formed yellow colonies on nutrient agar and denitrified nitrate to nitrogen. The optimal temperature, pH, and substrate concentration for oxidation of 2,4'-dichlorobiphenyl (2,4'-diCB) in 0.05M sodium phosphate buffer was 30°C, 7.5, and 0.25 mM, respectively. The extracts of cells grown on biphenyl or in the presence of 2,4' -diCB contained the activity of biphenyl-2,3-dioxygenase (BPDO). -- The bacterium degraded mostly mono- to trichlorinated biphenyls (i.e. monoCBs, diCBs, and triCBs) and few tetrachlorinated biphenyls in commercial mixtures. The extents of removal of many of the PCBs were similar at 5° and 30°C. The PCBs that were removed in Aroclor 1221, Aroclor 1232, and Aroclor 1248 was dependent on the composition of the PCB mixtures as well as the number and pattern of chlorination of the congeners. -- Chlorinated benzoates (CBAs) were end-products of transformation of 2,3-, 2,4'- diCBs, and 2,4,4'-triCB but cells accumulated significant levels of 2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoic acids (HOPDAs) from 2,4'-diCB and 2,4,4'-triCB. The formation of HOPDAs from PCB mixtures or 2,4-diCB and 2,4,4'-triCB indicates that the bacterium preferentially attacked PCBs at the rings bearing para-chlorine. This could account for the accumulation of HOPDA from 2,4'-diCB or 2,4,4'-triCB. Further transformation studies at selected temperatures using 2,4'-diCB indicated that although the parent compound was significantly degraded at low or moderate temperatures (10°,25°, 37 °C), excess level of HOPDA(s) accumulated from 2,4'-diCB leading to poor production of 2- and 4-CBA. The degradation of 2,4' -diCB was inhibited at a higher temperature (45°C), but most of the degraded compound was recovered as CBAs without excess production of HOPDA. Trimethylsilyl-derivatized culture extracts contained multiple isomeric intermediates with mass spectra that are similar to those of monochlorohydroxybiphenyls, monochlorodihydroxybiphenyls, dichlorodihydrodiols, dichlorodihydroxybiphenyls, and dichlorinated HOPDAs. The detection of some of these products in culture extracts could not be accounted for on the basis of the previously proposed routes of transformation 2,4' -diCBs. Nonetheless, it is suggested that multiple pathways are used for the transformation of 2,4'-diCB and that the pathways are regulated differently at different temperature. This novel findings is the first reported case in which production of excess level of potentially toxic HOPDA from 2,4' -diCB could be avoided under specific conditions in a bacterium that preferentially attacked parasubstituted rings of PCBs. -- Three chromatographic fractions from crude cell extracts separated using a Fast-Flow DEAE Sepharose column were required together to restore maximum activity of partially purified BPDO. The enzyme was specific for (chloro)biphenyls but it shows less activity against 2,4,4'- and 2,2' ,4-triCBs. BPDO was active against benzene, toluene, and xylenes, and it retained activity against (chloro )biphenyls at 7 °C, but not against 4-CBA or benzene. It was stable at 0° to 63 °C and its activity is enhanced in the presence of 1 ,μM FAD. Unlike other metal ions, mercury (II) and copper (II) severely inhibited the activity of BPDO. The optimal pH, temperature, and substrate concentration for BPDO activity in air-saturated 50 mM MES buffer was 6.0, 25°C, and 150 μM, respectively. The apparent Km of partially purified BPDO for biphenyl was 77.5 μmol and the V max value for NADH was 0.04 μmol per min⁻¹ mg⁻¹ protein. The activity of BPDO was inhibited in the presence of excess biphenyl.


identifier: Lanctin, Henri <https://research.library.mun.ca/view/creator_az/Lanctin=3AHenri=3A=3A.html>   (1983) Renal glutamine metabolism: studies with the perfused kidney and with isolated cortical tubules.  Masters thesis, Memorial University of Newfoundland.

abstract: The isolated perfused kidney system was developed in our lab and functionally defined. With this technique kidneys from rats which had been subjected to an NH₄CL induced metabolic acidosis for 7-days and 24-hour recovery from this condition were perfused with glutamine. Rates of ammmoniagenesis and gluconeogenesis were measured. Ammoniagenesis was back to normal after 24 hours of recovery which is what occurs with in vivo NH₃ excretion. This implies an intrarenal adaptation in the 24-hour recovered situation. Acidotic rats were subjected to a metabolic alkalosis following a 7-day acidotic challenge. Isolated kidneys perfused 8-hours after this accelerated recovery was initiated maintained acidotic rates of ammoniagenesis. This is contrary to in vivo NH₃ excretion in rats treated in a similar manner in which a return of NH₃ excretion to normal is observed. Thus, an acute, reversible, extrarenal influence is responsible for the supervision of ammoniagenesis under these conditions. -- With the isolated cortical tubule preparation, rates of ammoniagenesis from glutamine were found to be stimulated by acute acidosis (pH 7.06) and with L-methionine-s-sulfoximime (M.S.O.) an inhibitor of glutamine synthetase (G.S.). In tubules incubated with glutamate NH₄CL and lactate acute acidosis was found to inhibit NH₃ uptake and glutamine synthesis. This reaction to acute acidosis was also demonstrated in cortical tubules from acidotic and 24-hour recovery animals. From these results it is clear that in some way the acute change in H⁺ concentration effectively decreases the activity of G.S. resulting in an apparent stimulation of ammoniagenesis. -- A model is presented which correlates this observation with anatomical heterogenicity and in vivo responses to acute acidosis.


identifier: Lane, C. Gerard <https://research.library.mun.ca/view/creator_az/Lane=3AC=2E_Gerard=3A=3A.html>   (1983) The role of the assistant school superintendent in Newfoundland and Labrador.  Masters thesis, Memorial University of Newfoundland.

abstract: The newly created position of assistant superintendent of education in the Province of Newfoundland and Labrador was the focus of this study. The objective was to define the role of the assistant superintendent in Newfoundland and Labrador. -- There were 53 assistant superintendents employed in the province of Newfoundland and Labrador, and all of these were included in the study. A questionnaire was devised and piloted containing 105 possible tasks which could be performed by an assistant superintendent. Each assistant superintendent was asked to rank each task as a major responsibility, a medium responsibility, a minor responsibility, or a non-responsibility. All assistant superintendents replied to the questionnaire. -- Profiles of the assistant superintendents were drawn for small school districts, and medium and large school districts. Small school districts employ one assistant superintendent, whereas medium and large school districts employ two, three or four assistant superintendents. -- One profile was drawn for small school districts, and three profiles were drawn for medium and large school districts. These were: assistant superintendent responsible for curriculum and instruction, assistant superintendent responsible for personnel administration, and assistant superintendent responsible for the general administration of a unit in the district. -- The major findings of this study were: -- 1. The assistant superintendent in small school districts has major responsibility in the areas of curriculum and instruction and personnel administration, minor responsibility in the areas of pupil services and school-community relations, and no responsibility for business administration. -- 2. The assistant superintendent responsible for curriculum and instruction has major responsibility in the area of curriculum and instruction, with minor responsibility in the areas of personnel administration, school-community relations, and pupil services; and no responsibility in the area of business administration. -- 3. The assistant superintendent responsible for personnel administration has major responsibility in the area of personnel administration, medium responsibility in the area of curriculum and instruction, and minor responsibility in the areas of pupil services, school-community relations, business administration. -- 4. The assistant superintendent of general administration has medium responsibility in the areas of curriculum and instruction and personnel administration, minor responsibility in the areas of pupil services and school-community relations, and no responsibility in the area of business administration.


identifier: Lang, Raylene A. <https://research.library.mun.ca/view/creator_az/Lang=3ARaylene_A=2E=3A=3A.html>   (2005) Making waves: women in Newfoundland politics.  Masters thesis, Memorial University of Newfoundland.

abstract: This case study seeks to account for why the 1993, 1996, and 1997 federal and provincial elections in Newfoundland returned record numbers of women MPs and MHAs. Three explanations are considered: (1) provincial and federal political leaders made a determined effort to incorporate more women into the political process; (2) the long term efforts of the women's movement came to fruition; (3) gender bias ceased to have an effect on voters and party officials. The data analyzed comes from personal taped recorded interviews, mail-in and email questionnaires. Those interviewed consist of twenty-eight women and two men, all active in either federal or provincial party politics or in the women's movement. Particular attention was given to women candidates - successful and unsuccessful - federal and provincial, and political leaders at both levels. The data shows that the efforts of the women's movement were essential. However, the decisions of party leaders - the "leader's will" - also appear important and should be more fully explored.


identifier: Langille, Amanda E. <https://research.library.mun.ca/view/creator_az/Langille=3AAmanda_E=2E=3A=3A.html>   (2012) A detailed petrographic, geochemical and geochronological study of the Hare Bay Gneiss, northeastern Newfoundland.  Masters thesis, Memorial University of Newfoundland.

abstract: The Hare Bay Gneiss occurs as three discontinuous northeast-trending belts along the northeastern margin of the Gander Zone and has been described briefly in previous literature as a highly deformed assemblage of paragneiss, orthogneiss and migmatite. Past interpretations of the Hare Bay Gneiss include that it is a highly deformed equivalent of the adjacent Square Pond Gneiss (Blackwood, 1978) and some studies (Blackwood and Kennedy, 1975) proposed it as potential basement to the Gander Zone. Lack of modern documentation and analyses of the rock types that constitute the Hare Bay Gneiss impede definitive interpretations from being made. In an effort to better understand the Hare Bay Gneiss and its importance to the Gander Zone as a whole; this study combines field observations with petrological, geochemical and geochronological data from well exposed sections from Wind Mill Bight Provincial Park Reserve in the north and the town of Hare Bay, in the south.  -- Through detailed field mapping and petrographic analysis it is evident that a diverse assemblage of rocks constitutes the studied exposures of the Hare Bay Gneiss. Based on the seven selected study localities the northern belts of the Hare Bay Gneiss predominantly consist of greenschist-facies orthogneiss ranging from granitic to tonalitic in composition, and also includes locally abundant, variably deformed granitic intrusions. The mapped area of the Hare Bay Gneiss contains several minor rock types including tonalite, paragneiss, pegmatite, mafic intrusions, and quartz veins. Nearly all of the orthogneissic and granitic rocks have peraluminous geochemical signatures and REE patterns diagnostic of crustal melts. -- Nine main lithologic units yield concordant ages using the CA-TIMS U-Pb zircon technique. In the Windmill Bight map area four dated units constrain magmatism, ranging from 428 ± 2 Ma for foliated leucogranite to 387 ± 2 Ma for late pegmatite. Leucogranite and At-silicate-bearing orthogneiss in the Greenspond Road section yielded ages of 460 ± 2 Ma and 510 ± 4 Ma, respectively, making the orthogneiss the oldest dated unit so far in the Hare Bay Gneiss. Although lithologically similar, the granitic Valleyfield orthogneiss and the Hare Bay orthogneiss have contrasting concordant U-Pb zircon ages of 465 ± 2 Ma and 491 ± 4 Ma, respectively. Finally a tonalite intrusion cutting an orthogneiss in the "I Love You" section yielded a zircon age of 415 ± 1 Ma. -- The new data demonstrates the complexity of the Hare Bay Gneiss, which contains intrusive rocks ranging in age from Series 2 of the Cambrian to mid- Devonian (Givetian). Based on these data, it is unlikely that these rocks are metamorphic equivalents of adjacent gneisses, or basement rocks to the Gander Zone. Rather they may be partial melts of Gander Group sedimentary rocks and mainly represent pulses of magmatism into crust of the Gander Zone. Many magmatic events recorded in this study are observed elsewhere in the Gander Zone in Newfoundland; specifically Ordovician, Silurian and Devonian ages can be correlated in time with Penobscot, Salinic and Acadian orogenic events recognized elsewhere in the Gander Zone in Newfoundland.


identifier: Larner-Pardy, Mary <https://research.library.mun.ca/view/creator_az/Larner-Pardy=3AMary=3A=3A.html>   (1991) Newfoundland's special education policy: pilot schools' perception of professional competencies necessary for successful implementation.  Masters thesis, Memorial University of Newfoundland.

abstract: The purpose of this study was to (1) determine competencies judged to be important by various educational professionals for the successful implementation of the Special Education Policy in the province of Newfoundland and, in turn, (2) to determine how competent those professionals perceived themselves to be on those important competencies. -- A questionnaire consisting of 118 items, pertaining to 8 different categories of competencies deemed to be important through expert judgement, was developed by the researcher and administered to the fifteen pilot schools selected by the Department of Education in Newfoundland. These pilot schools were those designated as schools which would receive in-service support over a three year period as they implemented the new Special Education Policy. They were to also serve as exemplary sites for their respective school districts as well. -- Respondents were asked to rate each item on two Likert-type scales. The first scale asked the respondent to indicate the level of item importance for professionals in the same role as that of the respondent. The second scale required the respondent to rate how competent they perceived themselves to be on that item. -- Mean scores were computed for each questionnaire item and, in turn, each category, according to a respondent's professional title and year in policy implementation. Comparisons were then made between respondents on the basis of: type of professional responding; pilot school's year in policy implementation; and grade level taught by respondents. -- Results of the study revealed the following: -- (a) Those competencies which the various respondents felt important for policy implementation and competent in delivering. -- (b) Competencies respondents felt important for implementation but perceived themselves as being less competent in carrying out were also identified. -- (c) All of the eight professional competency categories were deemed to be important for successful implementation, and all respondents perceived themselves to be competent on the two categories which they felt to be most important for successful implementation, namely, the ability to develop a positive, accepting classroom and school atmosphere which, in turn, fosters constructive interaction between all students and possessing the individual personal characteristics thought to be important traits for any teacher to possess, but specifically for those with special need children in their class. -- (d) Compared to regular classroom teachers and school administrators, special education teachers perceived themselves to be the most competent on items they felt important for successful implementation. -- (e) As compared to special educators and school administrators, regular classroom teachers perceived themselves to be the least competent on items they felt to be important. -- (f) Respondents perceived themselves to be competent on the majority of items they felt to be important for successful implementation of Newfoundland's Special Education Policy. -- (g) As professionals progressed through the three years of policy implementation, their perceived level of competency increased. -- (h) Regular classroom teachers, special education teachers, and school administrators at all levels of policy implementation perceived themselves as less than competent on competencies dealing with professional knowledge of the characteristics of special needs children and adaptations necessary to effectively teach them. -- (i) Special education teachers and professionals in their third year of policy implementation perceived themselves as more competent on assessment competencies than did professionals at earlier stages of policy implementation. -- (j) Regular classroom teachers and school administrators perceived themselves to be less than competent in the areas of communication with parents, colleagues and administrators, and goal setting competencies. -- (k) The importance placed on instructional strategy competencies and personal characteristics of those responsible for meeting the needs of exceptional students, significantly increased as Professionals reached their third year of policy implementation.


identifier: Larouche, Kimberly J. <https://research.library.mun.ca/view/creator_az/Larouche=3AKimberly_J=2E=3A=3A.html>   (2007) Staff and employee perspectives on recovery management: a study of a tertiary health care facility.  Masters thesis, Memorial University of Newfoundland.

abstract: Lost time from work as a result of sickness or workplace injuries has considerable financial repercussions for both employers and employees. Employers suffer financially when trying to recruit new and/or replacement staff, training new people and ultimately in losing valuable productive employees either temporarily or on a more permanent basis. Employees also suffer financially but more importantly in ways that are much more difficult to measure such as their loss of a productive role, their routine and opportunities to socialize and sense of contributing to the community through their work. Within the multidimensional construct of return to work, it is recognized by employers and health care providers that whether or not a person successfully returns to work after a period of illness/injury depends on a variety of factors. These include worker factors such as the functional capacity of an individual, their health and psychosocial status and overall attitudes towards work. Workload factors include such things as the type of work that is performed, the physical and psychosocial demands of the work and the pace of work, for example. Recovery management is a process whereby the recovery from an illness or injury of a worker is managed by the employer. The goal is to address all of those factors which impact on return to work so the worker can return to work as early as possible and in an environment that is safe. In recognizing this, injury and illness related recovery management strategies require an appreciation of the potentially wide-ranging issues associated with return to work. However, less is known about the strategies that are utilized in enabling an effective and durable return to work. -- The purpose of this thesis was to explore the perspectives of the various stakeholders in the recovery management process including recovery managers, employees and those who supervise those employees when they return to work. Specifically, this thesis was designed to describe the process of recovery management which was implemented in a large tertiary health care institution and which was designed to address absenteeism and return to work after a period of injury and illness. -- Nineteen employees including nine recovery managers and five supervisors and the same number of workers, participated in this study. They all were employed in the health care facility. Each of them participated in a semi-structured interview. The interviews were transcribed and subjected to a thematic analysis. -- The results showed that it was believed by the participants that all stakeholders in the recovery management process should be knowledgeable of the process, in order to avoid delays in the process and miscommunication, particularly when returning to work. Additionally, it was perceived by the participants that it was important for the recovering worker to feel appreciated and to be involved in meaningful return to work activities in order for return to work to be successful. Specific thematic analysis for each group revealed that recovery managers felt that increased workload was an issue for them since the implementation of a recovery management program. The supervisors for their part felt conflicted in trying to meet their production quotas, in addition to accommodating recovering workers in their area. Workers often found the follow-up upon return to the worksite not adequate leading to fears of re-injury or medical setback. Many of the worker participants felt that they had little support from either their supervisor or their assigned recovery manager when they participated in the return to work process. -- In concluding, although the recovery management and return to work process seemed to be supported by the participants in the study, common themes to all stakeholders such as education around the process, effective communication and ensuring the recovering workers felt appreciated when returning to work, were areas that were identified as needing further development.


identifier: Lau, Ming-Jarm. <https://research.library.mun.ca/view/creator_az/Lau=3AMing-Jarm=2E=3A=3A.html>   (1978) Homeoviscous adaptation in turtle lung surfactant.  Masters thesis, Memorial University of Newfoundland.

abstract: To determine if homeoviscous adaptation occurs in lung surfactant of an air-breathing ectotherm so as to maintain a specific physical state critical for function at different temperatures, map turtles were acclimated to 5, 14, 22, and 32°C for at least one month. Lipid analyses were carried out with lung lavage fluid and lung tissue using thin layer chromatography and gas-liquid chromatography. – Whereas phospholipid content per g of fresh lung tissue in lavage fluid was significantly elevated at 32°C as compared to 5 and 14°C, no significant differences were observed in phospholipid content in lung tissue with changing temperature. Lecithin was the major phospholipid in lavage fluid, constituting more than 70% of total phospholipid, and it increased with increasing temperature. The two major phospholipids, in lung, phosphotidylcholine and phoshatylethanolamine showed changes with temperature and trends which were complementary to each other. There was a proportionate increase in palmitate and decrease in palmitoleate content in both total lipid and Phosphatidylcholine in lavage fluid. The changes in palmitate content in lavage fluid were not reflective of a general increase of the corresponding fatty acid in the lipids of lung. A significant increase in saturation was found in total lipid and phosphatidylcholine of lavage fluid, and phosphatidylcholine and phosphatidylethanolamine in lung. Saturated lecithin isolated from total lavage had a fatty acid profile consisting primarily of palmitate, 85 mole%. Saturated lecithins, principally dipalmitoyl lecithin, increased as a proportion of lavage lecithin with increasing body temperature. Thermograms of model lecithin mixtures approximating the lecithins in lavage from turtles kept at 5 and 32°C showed a shift in transition temperature, implying the difference in dipalmitoyl phosphatidylcholine content in the lipids resulted in a change in physical state. These finding were consistent with the preservation of a constant specific phase(s) in surfactant lipid at each temperature of acclimation.