identifier: Jones-Hiscock, Cherie <https://research.library.mun.ca/view/creator_az/Jones-Hiscock=3ACherie=3A=3A.html>   (2003) The factors associated with length of stay on acute care psychiatry inpatient units in St. John's, Newfoundland and Labrador.  Masters thesis, Memorial University of Newfoundland.

abstract: Background: In St. John's, Newfoundland there are three tertiary care institutions that provide acute inpatient psychiatry services. To date, the factors associated with increased length of stay, in these institutions, has not been systematically studied. -- Some of the psychiatrists who admit patients to these facilities have speculated that the length of stay and the distribution of the factors associated with length of stay varies across the inpatient psychiatric facilities in the city. The accuracy of their opinions has not been examined previously. -- Objectives: Length of stay on acute care hospital units is influenced by many factors such as patient demographics, diagnosis, treatment regime and attitudes of the attending physician. This study has three objectives: 1) to identify the factors associated with length of stay on the acute admission wards in St. John's, Newfoundland, 2) to assess the accuracy of the psychiatrists' opinions that length of stay differs significantly among the three psychiatric institutions in St. John's and 3) to assess the accuracy of the psychiatrist's opinions with respect to the factors that impact on length of stay in St. John's, Newfoundland. -- Method: A chart review was conducted to measure length of stay by institution and to determine which factors were associated with length of stay for inpatient psychiatry units in St. John's. The data represents patients discharged from hospital between April and June 1997 inclusive. The patients were above 19 years of age, were discharged from an acute care inpatient unit during the study period, and had no other admissions during the thirty days prior to the admission or within 30 days of the discharge. Fourteen variables were examined for a potential association with length of stay. Regression analysis was used to identify significant associations between patient, illness and treatment related factors and length of stay. -- Data from the chart review was also used to assess the accuracy of the psychiatrists' opinion that length of stay varies significantly among the acute care admissions of the city. The length of stay was calculated for each admission site and then compared for significant differences. -- Psychiatrists' perceptions of the factors associated with length of stay were gathered by an opinion questionnaire. The questionnaire was administered to all psychiatrists with admitting privileges for the acute psychiatry inpatient sites in St. John's. Descriptive analysis was used to quantify the psychiatrists' opinions. These opinions were then compared to the results of the chart review for factors associated with length of stay. -- Results: Results of the chart review revealed that length of stay did not vary significantly among the three institutions, or between the two types of admission sites. Of the fourteen factors examined for an association with length of stay, patient age, primary diagnosis, presence of a discharge plan, and duration of the discharge plan were significant. The involvement of pastoral care workers in the patient care almost reached the level of significance. -- Results of the survey revealed that the majority of psychiatrists were of the opinion that patient age, gender and race had little impact on length of stay. The age and gender of the treating psychiatrist were also believed to have little impact on length of stay. Level of education, marital status, employment status, income level, and place of residence were believed to have moderate impact on length of stay. The level of patient stress, primary diagnosis, the presence of co-morbid illness, treatment issues, the expertise of the attending psychiatrist and the practice composition of the attending psychiatrist were believed to impact substantially on length of stay. This was not entirely consistent with the results of the chart review. -- Discussion: Four of the fourteen variables were significantly associated with length of stay on the inpatient psychiatry units in St. John's, Newfoundland. Several of these findings are consistent with earlier studies. Of the ten remaining factors that were not significantly related to length of stay, seven had been previously studied and shown to be associated with length of stay in other clinical settings. This suggests that the factors associated with length of stay in St. John's, Newfoundland may be unique to that region and that length of stay literature is not universally applicable. -- The psychiatrists' perception that lengths of stay varied significantly among sites was inaccurate. As well, the psychiatrists' perceptions of factors that are associated with length of stay were not consistent with the findings of the chart review. This discrepancy between opinion and reality warrants further examination if physicians are to be expected to actively reduce length of stay in the future.


identifier: Joo, Jae Shik <https://research.library.mun.ca/view/creator_az/Joo=3AJae_Shik=3A=3A.html>   (1985) Behaviour of large scale rigid model piles under inclined loads in sand.  Masters thesis, Memorial University of Newfoundland.

type: Thesis NonPeerReviewed

abstract: Attention has been directed towards the stability of offshore structures since the discovery of oil under the sea bed in the 1920’s. Especially important in this field of engineering are the large lateral loads from wind, waves, and currents in conjunction with vertical loads. This combination of loads creates the need to analyze systems exposed to large inclined loads. – The scope of this research is to understand the behavior of a vertical rigid short pile under inclined loads in dense sand. The pile behavior under inclined loads has been examined in the laboratory using relatively large circular model piles of 75 mm, 90 mm, and 102 mm diameters and a square pile of 73 mm width. These model piles were instrumented with pressure transducers and load cells in order to measure soil pressures. The piles were tested with vertical, inclined, and horizontal loads using a computerized data acquisition system. For these model pile tests a suitable laboratory test frame and a circular steel soil container were designed and assembled. – As part of the comprehensive test program, the piles were first subjected to vertical loads. The bearing capacity factor Nq was found to be constant with depth and consistently smaller than that predicted by various existing theories. For a smooth circular pile the pull out resistance can be estimated as the sum of one half the downward skin friction plus the weight of the pile. – For computing the ultimate lateral load on circular piles, modification of existing theories is necessary to take into account the parabolic soil pressure variation across the projected pile diameter, rather than the rectangular distribution which is conventionally assumed.  – The ultimate load capacity under inclined loads does not decrease uniformly with load inclination. For angles up to about 35°, the ultimate load capacity is larger than the vertical load capacity.


identifier: Joudrey, Ronald Michael <https://research.library.mun.ca/view/creator_az/Joudrey=3ARonald_Michael=3A=3A.html>   (1971) The meaning of work in a hospital emergency department.  Masters thesis, Memorial University of Newfoundland.

abstract: This exploratory case study is set in a hospital emergency department. The broad research problem is to acquire a picture of life in an emergency department as seen by workers there. To this end, participant observation was carried out by the author. Because of the relatively unstructured nature of the research, generalizations were developed in a grounded theory fashion. -- The analysis is focused on staff attitudes and responses toward five types of patients: accident victims, medical patients, drunks, overdoses and drug cases, and nonemergencies. Four stages of the emergency career of each of these five patient types are discussed: initial contact, diagnosis and treatment, release, and post mortem. The treatment of each of these types of patients poses certain problems significant for "Emergency" staff. -- The most significant finding is that most patients violate the staff's concept of an emergency department as a quick repair, quick release treatment center for serious cases of recent onset. As a result of this discrepancy between staff expectations and reality, various strategies are used by workers to gain control over their work. Also, certain findings from previous studies of emergency departments are discrepant with the results of the present investigation. -- An attempt is made to explain why staff remain working in Emergency despite their dissatisfaction which stems from treating a majority of nonemergencies, working in an inadequate spacial layout and facing staffing shortages. The theory of commitment is offered as an explanation. -- Finally, practical and research implications are presented. The value of the present study in identifying typical situations in emergency departments is stressed.


identifier: Kang, Zhili <https://research.library.mun.ca/view/creator_az/Kang=3AZhili=3A=3A.html>   (2003) Development of targeted delivery systems for early detection and genetically therapeutic intervention of cardiovascular disease.  Masters thesis, Memorial University of Newfoundland.

abstract: Atherosclerosis is a primary cause of heart disease and stroke. It is known that early detection of atherosclerotic lesions would significantly reduce the risk. One of the objectives in this thesis is to evaluate a noninvasive radioimaging method for detecting early atherosclerotic plaques. A novel polyiodinated cholesterol analog, cholesteryl 1,3-diiopanoate glyceryl ether (C21), radiolabeled with ¹²⁵I, was incorporated into acetylated low density lipoprotein (AcLDL) which is considered as an atherosclerotic plaque seeking carrier. ¹²⁵I-C21 was also prepared as a chylomicron-like emulsion. ¹²⁵I-C21/AcLDL or ¹²⁵I-C21 emulsion was intravenously injected into apoE/LDL receptor (LDLR) double knockout mice that serve as an atherosclerosis animal model. The ex vivo images of radioactivity accumulated in the aortas 24 hours postinjection were compared to the atherosclerotic lesions revealed by histological studies. It was found that both ¹²⁵I-C21/ AcLDL and ¹²⁵I-C21 emulsion resulted in accumulation of radioactivity at the site of early atherosclerotic lesions, and therefore may be useful for early detection of atherosclerosis. -- Treatments for atherosclerosis include general lipid-lowering strategies and approaches toward etiology. Among the multiple risk factors associated with atherosclerosis, familial hypercholesterolemia (FH) is the first genetic disorder recognized to cause severe premature atherosclerosis. Ultimate treatment for FH depends on gene therapy which can correct its WLR deficiency. The second part of this thesis focused on the development of a liver-targeting liposome vector for systemic gene therapy, with the objective of delivering mouse LDLR gene to the liver of the LDLR- knockout mouse, an animal model closely resembling human FH conditions. A peptide from the circumsporozoite protein (CS) of malaria parasites was chosen as the liver-targeting ligand. Cationic liposome/protamine/DNA (LPD) complex conjugated with the malaria peptide was prepared by different protocols and primarily investigated in vitro to transfect cultured cells with a reporter gene, either the chloramphenicol acetyltransferase (CAT) gene or the enhanced green fluorescent protein (EGFP) gene. Peptide-LPD complex showed higher CATIEGFP expression in HepG2 cells (human hepatoma cell line) than LPD itself, whereas no significant difference was observed in Hela cells (human cervical cancer cell line, control). However, these results were still preliminary and somewhat inconsistent. Further studies are needed. -- Finally, chapter 4 summarized other work using LDL as a potential targeting carrier for lipophilic antitumor drugs. A prodrug, dipalmitoyl-5-fluorodeoxyuridine (dpFUdR), was synthesized and incorporated into LDL. The antiproliferative effect of the resultant LDL-dpFUdR was investigated in human cervical cancer cells.


identifier: Kang'ombe, Jeremiah <https://research.library.mun.ca/view/creator_az/Kang=27ombe=3AJeremiah=3A=3A.html>   (2004) Development of feeding protocols for Tilapia rendalli in Malawi reared in semi-intensive culture systems.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Tilapia is the major group of fish used in aquaculture in Malawi and its potential has never been realised. Previous research has focused on improving the growth performance. Nutritional studies were carried out to determine and improve feeding protocols in order to enhance the growth of Tilapia rendalli. The first experiment was on the effect of using different organic manure. T rendalli in the chicken manure treatment were significantly larger and had higher net annual yields than those in cattle, pig manure and no-manure treatments. Significantly higher amounts of chlorophyll a and numbers of zooplankton were found in ponds fertilized with chicken manure. -- In the second experiment, T rendalli were evaluated in ponds fertilized with chicken manure to determine the effect of using different single ingredient supplements. T rendalli in the soybean treatment were significantly larger and had higher net yields than in maize bran, rice bran and unsupplemental, chicken manure treatments. -- The third experiment was set up to determine the effect of different temperatures. T. rendalli in the 32°C treatment were significantly larger than those in 24, 28°C and ambient temperatures. Fish cultured at 32°C had significantly higher digestibility coefficients, lower feed conversion ratios, higher feed conversion efficiency and protein efficiency ratios. The last experiment examined the effect of different salinities. T. rendalli in the 10 0/00 grew significantly larger than those in the freshwater, 5 0/00, and 15 0/00. Fish cultured in 10 0/00 salinity had significantly higher digestibility coefficients, lower feed conversion ratios, higher feed conversion efficiency and protein efficiency ratios. The survival of the fish was significantly different among salinity levels decreasing from 100% in freshwater to 66.7% in 15 0/00 salinity treatment. -- The overall results suggest that the use of chicken manure would produce better results than cattle and pig manure treatments, and ponds fertilized with chicken manure may be supplemented with soybean to increase yield. Water temperature of 32° C and salinity level of 10 0/00 may be optimal for T. rendalli because feed conversion was higher, and digestibility coefficients were higher for protein, fat, ash and gross energy under these conditions.


identifier: Karmazin, Max <https://research.library.mun.ca/view/creator_az/Karmazin=3AMax=3A=3A.html>   (2003) Simplified fuzzy logic controller based indirect vector control of an induction motor drive.  Masters thesis, Memorial University of Newfoundland.

abstract: Modem motor controllers are based on the concept of machine intelligence (MI). These intelligent controllers have been employed increasingly in advanced electric motor drives and in particular, in present-day induction motor drives. These systems attempt to emulate the work of human logic, which is a very effective approach for applications with poorly defined mathematical model. Such intelligent systems grant high robustness and adaptive behaviour, as well as high efficiency, high torque to current ratio and high power to weight ratio. These systems are also called high performance drive systems (HPDS). This is why an intelligent control of electric motor drives and induction motors in particular, has been in the scope of attention of electrical engineers in recent years. Of three major types of MI controllers, the fuzzy logic controller (FLC) is used to overcome parameter variations, sudden speed or load changes and other non-linear disturbances. This work employs also a technique called field-oriented control of induction motor (IM) to achieve high performance of the drive controlled by the MI-based motor controller. -- This thesis presents development and implementation of an integral field oriented intelligent control of an induction motor drive using fuzzy logic controller. An analytical model of an induction motor drive has been developed. Extensive simulations were carried out at rated speed, lower than rated speed and over the rated speed. An induction motor slip gain tuning scheme is coupled with the developed simplified fuzzy logic controller to achieve high performance and reduce computational burden as well as complexity. Simulations and experimental data also assess the realisation of proposed combined controller. Conventional proportional-integral-derivative (PID) based controllers are used to compare and to confirm better performances and dynamic characteristics of the induction motor (IM) controlled by the developed controller. -- A digital signal processing (DSP) board DS 1102 and laboratory induction motor were used to successfully implement the complete vector control scheme. The test results agree with simulated results for different dynamic operating conditions. The efficacy of the proposed fuzzy logic based control scheme has been successfully established.


identifier: Karnouk, Marlene <https://research.library.mun.ca/view/creator_az/Karnouk=3AMarlene=3A=3A.html>   (1973) Boscoville and social adjustment.  Masters thesis, Memorial University of Newfoundland.

title: Boscoville and social adjustment

abstract: This thesis reports data on a study of the attitudes of juvenile delinquents committed to a reform school in Quebec called "Boscoville." It also considers the rehabilitation policies associated with these attitudes and the problem of social adjustment of juveniles following their release from the centre. The chief aim of the investigation was the generation of a grounded theory of commitment to delinquency. -- The phenomenon of juvenile delinquency is approached from the point of view of the subjective career; men create special realities through a process of interpretation of events directly connected with their major identities. Using .this principle as a starting point, one can clearly distinguish between two basic types of delinquency. -- 1. Drift: the life of the individual is not organized around crime nor does lawbreaking become part of his identity. Juveniles in drift do not share the background traits that characterize most delinquents in Boscoville such as inadequate family relations, failure in school, and repeated deviant activities. Lawbreaking to them is not a permanent solution to life's problems. -- 2. Commitment: the individual becomes aware of his association with deviance when he recognizes that he is forced into a career within it. Juveniles who identify thus deviance share certain attitudes towards their major life experiences (some of which were investigated in this study). They internalize the community definitions of deviance and live up to that image, so that regardless of the differences in their personal identities, they share a social identity based on the deviant role they play. -- The attitudes of juvenile delinquents in drift differ from the attitudes of juveniles who are attached to deviance. An investigation of those attitudes and their causes may help guide rehabilitation favourable to the inmate's social adjustment. Indeed, Boscoville eliminates the deviant identities of its inmates, by offering them the possibility of reentering the conventional world by enhancing their self-images and by engendering an awareness of the world and its time-space relationships. -- Rehabilitation in Boscoville, however, does not necessarily eliminate lawbreaking activities motivated by for financial gain. In fact, an awareness of the consequences of one's action also makes one more conscious of the implications of one's criminal action. Boscoville can help an individual become better adjusted to the world he lives in, even though it may help some become better thieves.


identifier: Kasimos, Constantinos <https://research.library.mun.ca/view/creator_az/Kasimos=3AConstantinos=3A=3A.html>   (2007) Impact of seed and seedling predators on recruitment of Newfoundland red maple.  Masters thesis, Memorial University of Newfoundland.

abstract: Island ecosystems evolve in geographic isolation, making them particularly vulnerable to synergistic, sometimes irreversible, effects of non-native invasive species. The recent introduction of the southern red-backed vole (Clethrionomys gapperi) to Newfoundland adds another species to the growing list of understudied introduced herbivores. This study focused on the effects of red-backed voles on the early life history stages of red maple (Acer rubrum). The recruitment capacity of red maple on the east coast of Newfoundland, where red-backed voles have not yet invaded, and the maples on the west coast, where red-backed voles are abundant were compared. Seeds were marked and monitored to determine the effects of post-dispersal seed predation on seed survival. Predator activities were monitored using tracking stations baited with dormant and fresh red maple seeds. Semi-permeable cages were used to determine the effect of the various herbivores on seedling survival. Insects caused the greatest seed loss, followed by non-native slugs and lastly small mammals. Seedling mortality was highest in dry microsites, probably do to desiccation. The cumulative effects of pre- and post-dispersal insect seed predation, as well as shrew, slug, and red-backed vole seed predation are resulting in 100% red maple seed loss in western Newfoundland. Because red maple regeneration in disturbed areas is dependent on recruitment from seed, as opposed to vegetative growth, the presence of red backed voles increases the potential for recruitment failure in red maple, especially in combination with the effects of other non-native seed herbivores.


identifier: Kaushal, Navin <https://research.library.mun.ca/view/creator_az/Kaushal=3ANavin=3A=3A.html>   (2011) Investigating the effect of self-talk on rating of percevied exertion and heart rate among male runners.  Masters thesis, Memorial University of Newfoundland.

abstract: The purpose of this study was to determine if the mental training technique of self-talk would alter an athlete's heart rate and the perception of exertion during a one-hour steady-state running test. Twenty nine athletic male runners aged 18 to 55 (37.9 ± 11.71) participated in this study. The athletes were randomized into three groups: 1) positive self-talk, 2) negative self-talk, and 3) control. Participants underwent a maximal oxygen uptake determination test (VO₂ max test) and a steady-state running test which was 70% of their VO₂ max. In the later test, participants' heart rate was measured and their Borg's Rating of Perceived Exertion (RPE value) was recorded after every five minutes. Participants in groups one and two attended a mental training session and created their own positive and negative self-talk statements. Participants in group 3 listened to a neutral documentary and completed a recall test after their run. There was no significant physiological difference between the three groups during the maximal oxygen uptake determination test (p =.627). The steady-state running test showed that there was no physiological difference in their maximal heart rate (p >.05). However, there was a significant difference of RPE value between the three groups (F (₂,₂₆)= 6.346, P =.006). Tukey's HSD post hoc test revealed that the positive self-talk group (1.89, ±.928) had significantly lower RPE values than the negative group (4.60, ± 2.50, p=.005). Amongst a physiologically homogeneous group, the results suggest that positive self-talk can increase the performance of athletes by concealing their awareness of feeling exerted.


identifier: Kavanagh, Jennifer M. <https://research.library.mun.ca/view/creator_az/Kavanagh=3AJennifer_M=2E=3A=3A.html>   (2008) Modeling burglars' occupancy decisions: fast and frugal or rational and complex?  Masters thesis, Memorial University of Newfoundland.

abstract: The performance of two full-information models (i.e., Dawe's rule and Franklin's rule) and a simple heuristic model (i.e., Matching heuristic) in predicting occupancy decisions by burglars was examined. Burglars (N = 40) were presented with photographs of 20 homes (previously coded on physical characteristics such as 'open window') and asked to infer whether or not the home was occupied. Performance of each model was measured by (a) relative accuracy- the percentage of photographs for which the models correctly predicted each burglar's occupancy decisions and (b) absolute accuracy - the percentage of photographs for which the models correctly predicted actual occupancy. In terms of relative predictions, the matching heuristic was more frugal than the other two models, using, on average, 1.08 cues in comparison to all available cues. Additionally, the matching heuristic was also the most accurate model, predicting 80% of participants' decisions accurately. When modelling the actual occupancy of residences the matching heuristic was again more frugal. While Franklin's rule was slightly more accurate than both the matching heuristic and Dawe's rule, there were no significant differences between the models based on the accuracy of their absolute predictions. Overall, it appears that a simple model of decision making is able to predict residential burglars' occupancy decisions and actual occupancy states equally as well as or better than complex models.


identifier: Kavanagh, William R. <https://research.library.mun.ca/view/creator_az/Kavanagh=3AWilliam_R=2E=3A=3A.html>   (2006) Slowly evolving horizons in perturbative general relativity.  Masters thesis, Memorial University of Newfoundland.

abstract: A motivation is made for a quasi-equilibrium set of black hole thermodynamic laws on the merit that they, being analogous to thermodynamics, are more physical than current formulations. Black hole formalisms are reviewed and it is determined that the trapping horizon is sufficient to formulate a slowly evolving horizon regime. A summary of this formalism and the accompanying thermodynamic laws are stated. To be slowly evolving, a horizon must meet certain general conditions and those conditions from [1] are stated. A particular spacetime, to be considered slowly evolving, must satisfy these conditions and they must translate to physically meaningful restrictions. Three spacetimes are checked to see that they are slowly evolving horizons. For all three spacetimes, the conditions are met and the zeroth and first laws are then confirmed to hold.


identifier: Kawaja, Marc Colin <https://research.library.mun.ca/view/creator_az/Kawaja=3AMarc_Colin=3A=3A.html>   (2006) Iron status in a population with mild hemophilia A: associations and impacts.  Masters thesis, Memorial University of Newfoundland.

abstract: Iron status, its associations and its impact on quality of life, was investigated in a cohort of patients residing in Newfoundland & Labrador. The population included individuals who were either affected with mild hemophilia A or were carriers of the Val2016Ala allele mutation that underlies the disease. The clinical impact of mild hemophilia A on serum ferritin, menstrual blood losses, quality of life and Body Mass Indices (BMIs) were investigated as part of a 2-year cross-sectional cohort study. The methodology included serum ferritin concentrations, complete blood counts (CBCs), the pictorial blood loss assessment chart (PBAC), bleeding histories, MOS short-form survey (SF-36) and BMIs. Iron depletion was prevalent in women (62% with ferritin levels <50 μg/L, 33% <20 μg/L), particularly in those who were menstruating (80% <50 μg/L, 47% <20 μg/L). Women in general self-reported a lower mean General Health Scale score (63.9, 59.9-67.9 vs. 70.6, 69.5-71.7) and a higher mean Role Emotional Scale score (89.3, 85.8-92.8 vs. 79.5, 77.7-81.3) than norms for the general U.S. female population. Men with a history of severe bleeding had significantly lower ferritin levels than men without a history of severe bleeding (123.4 μg/L, 63.6-186.3 vs. 189.8 μg/L, 105.9-301.5; p <0.05). Mutation status did not influence iron status in either sex or menstrual blood loss in women as measured by the PBAC. Serum ferritin level was not associated with PBAC score, but was related to women's BMI (r = 0.235, p <0.01). Neither the means of the eight SF-36 domains, health transition scale, nor the two component summary measures were significantly lower for mildly iron-deficient or iron-deficient women. The SF-36 is a general measure of various quality of life domains and may not have been sensitive enough to measure the effects iron deficiency could potentially have on women's cognition and fatigue. A study using measures more sensitive to these effects would better investigate the impact of iron depletion and iron deficiency. Further research is also required to determine whether the low ferritin levels observed in women could possibly be a result of inadequate dietary intake of iron or insufficient iron absorption.


identifier: Kean, Christopher R. <https://research.library.mun.ca/view/creator_az/Kean=3AChristopher_R=2E=3A=3A.html>   (2005) A bioassay-guided approach to the isolation and identification of potentially-mutagenic compounds in marine lipids.  Masters thesis, Memorial University of Newfoundland.

abstract: A significant amount of the total organically bound chlorine found in the marine environment has not been identified. A large portion of this unidentified organochlorine has been found to be associated with the lipids of marine organisms. If these unknown compounds are biologically active, then their presence may have negative consequences for the animal. Extracts from the blubber of seals from Newfoundland and from the blubber of seals and beluga whales from St. Lawrence River were tested for mutagenic activity using the Ames test before and after GPC fractionation in order to attempt to identify fractions containing mutagenic activity. However, no significant mutagenic activity was present in either case, although the whole lipid extracts were able to cause a higher number of revertant colonies than the fractionated samples. The presence of known organochlorine compounds were confirmed in the beluga whale samples by acid hydrolysis followed by GCI EI MS analysis. Details of methodologies and results of this work will be presented.


identifier: Kean, Crystal Olive <https://research.library.mun.ca/view/creator_az/Kean=3ACrystal_Olive=3A=3A.html>   (2005) Comparison of static and dynamic balance training on muscle activation, static balance, jumping and sprint performance.  Masters thesis, Memorial University of Newfoundland.

abstract: The role of balance and balance training in athletic performance: -- Balance has long been recognized as an important factor in a number of sports (such as gymnastics, and figure skating) and more recently has been regarded as important in other sports as well. Lack of balance has been shown to be detrimental to optimal performance through decreases in strength and force production, increased fatigue as well as predisposition to injury. Much of the research regarding balance training focuses on injury rehabilitation and prevention with little focus on examining the effects of short and long term balance training on athletic performance. The purpose of this paper is therefore to provide a comprehensive review of literature regarding balance, short and long term effects of balance training and its possible beneficial effects on athletic performance.  -- The objective of this study was to determine the effects static balance and dynamic balance training on muscle activation strategies, static balance, jump and sprint performance. Twenty-four recreationally active females were tested pre- and post-training (static balance training, n= 11, dynamic balance training, n = 7 and control group, n = 6). Experimental subjects completed either static or dynamic balance exercises 4 times per week for 6 weeks. Surface electromyography (EMG) was used to assess preparatory and reactive muscle activity of the rectus femoris (RF), biceps femoris (BF), and the soleus during one- and two-foot landings. Maximum vertical jump, static balance and sprint times were also examined. A 3-way ANOVA revealed a significant (p<.05) increase in reactive rectus femoris activity, as well as a group by time interaction for the reactive rectus femoris activity. The static balance group showed a 33% increase in reactive rectus femoris activity (p<.01). There was also significantly less reactive hamstring to quadriceps coactivation following training (p<.05). The group by time interaction for the static balance and maximum vertical jump height performance (p<.05) were also significant. The static balance training group showed a 33% improvement in static balance and 9% improvement in jump height performances. Based on the finding from this study, it appears that balance training is specific to task and therefore training programs should be designed to mimic the demands of the sport or activity.


identifier: Kearney, Anne Judith <https://research.library.mun.ca/view/creator_az/Kearney=3AAnne_Judith=3A=3A.html>   (2004) Making the connections: women talk about breast self examination.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Breast cancer is a serious health concern for women. Early detection has been hailed as key to reducing the morbidity and mortality associated with this disease. Largely as a result of three large trials that failed to demonstrate a mortality reduction with breast self-examination (BSE), the usefulness of this screening method has been seriously questioned. In 2001, the Canadian Task Force for Preventive Health Care concluded there was fair evidence to recommend physicians no longer routinely teach BSE to women. Through reports in the academic and lay literature, women have been advised that BSE may not only be ineffective, but harmful to them. The research problem is that there is a poor understanding of the meaning of BSE to women within a society that does not value it. Previous research on BSE was chiefly concerned with measuring women's knowledge, attitudes and beliefs related to BSE with the primary aim of increasing compliance. Yet, little was known about how women really felt about BSE. To investigate this phenomenon, women were engaged over time in a cycle of collective self-reflective inquiry to explore personal and social factors influencing their practice of BSE. This was achieved through a series of group discussions with two groups of women as they examined their everyday experiences related to BSE. Consistent with a participatory action approach, the women were considered co-researchers and were actively involved in the framing and analysis of the research problem. Thematic analysis allowed for the collaborative identification of the temporal map components that described the context of BSE for these women. These components were later organized by the women into a concept map, which provided a meaningful schematic representation of the meaning of BSE to them. Consistent with a feminist experiential approach, the standpoint of women was considered a valuable source of knowledge. Through this collective inquiry, the women developed a critical consciousness of the commonality of their personal experiences in relation to BSE, and their relationship to the larger social environment. In this way, the women were able to more fully understand the complexity of personal and social factors influencing the meaning of BSE to them, which was empowering. At the beginning of the research process, the women's subject position was characterized by their feelings of vulnerability in relation to their perceptions of breast cancer as a lethal disease and their inferior status in the world in relation to men. BSE is an intensely personal issue for women. It brings to the fore a complex web of interrelated meanings and experiences such as those related to cancer (breast cancer in particular), being a woman (and having breasts), and the health care system (including their treatment by physicians). By situating BSE at the juncture between these phenomena, a greater understanding of its meaning to women can be achieved. Three dominant discourses are relevant to women's practice of BSE: (a) femininity, (b) medical and technological dominance, and (c) lifestyle and responsibility for breast cancer. To the extent that breast cancer is seen as a threat to a woman's self-worth, she will be reluctant to do it. To the extent that a woman is ambivalent about her relationship with her physician and medical technology, BSE may be seen as a threat to her ability to care for herself. To the extent that the prevention, diagnosis and treatment of breast cancer is not well understood, BSE brings to the foreground the uncertainties of the disease and the reluctance of women to be held accountable for its trajectory. This research study has shown that experiential knowledge held by women is important and should not be subjugated by increasing medical and technological dominance. Relying solely on scientific evidence to evaluate BSE provides an incomplete measure of its value. Future research into BSE and other issues affecting women's health should be carried out collaboratively with women so that their voices are heard.


identifier: Keating, Kathy E. <https://research.library.mun.ca/view/creator_az/Keating=3AKathy_E=2E=3A=3A.html>   (2013) The effect of the mental illness label and characteristics of persons with mental illness on police officer attitudes and behavioral responses.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: The effect of the mental illness label and characteristics of persons with mental illness on police officers' attitudes and behavioral responses was examined. Specifically, officers (N = 112) from a Canadian police organization were presented randomly with one of eight hypothetical vignettes describing a male or female, suspect or victim, who was labeled as having a mental illness or for whom no information about mental health was provided. Participants completed self-report questionnaires assessing their attributions toward the individual in the vignette and how they would respond in such situations. Differences in officers' attitudes toward men and women were found on the help and pity subscales of the Attribution Questionnaire (AQ); different attitudes toward victims and suspects were obtained on the AQ danger, avoidance, credibility, and responsibility subscales; and, most notably, differences in attitudes toward an individual labeled with schizophrenia were found on all but the help subscale of the AQ. The latter finding, consistent with both attribution and labeling theories, reflected stereotypes and negative perceptions identified previously within the literature to be held by the general population. Results on the Predicated Behavioral Response Survey (PBRS) indicated that officers were significantly less likely to take action in a situation involving a victim with schizophrenia and more likely to take a report/file a complaint for a victim without a mental illness. Officers were also significantly more likely to arrest a suspect with schizophrenia. Gender of the victim or suspect had an inconsequential effect on behavioral responses. The implications of these findings for police training programs addressing mental health issues are discussed.


identifier: Keats, D. W. <https://research.library.mun.ca/view/creator_az/Keats=3AD=2E_W=2E=3A=3A.html>   (1986) The effects of the experimental removal of green sea urchins and of ice-scour on sublittoral benthic macro-algal communities in eastern Newfoundland.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: The results of an urchin removal experiment which was conducted over a four year period at a site in Conception Bay, Newfoundland are reported. The experiment was carried out to determine how the benthic algal community at a heavily grazed sublittoral Newfoundland site, subjected to periodic ice scour, would respond to a reduction in grazing pressure. Three transects were selected: one from which urchins were removed manually; one from which urchins were removed using quicklime, and one as a control. Sampling was conducted within each of three depth ranges: 0-2m, the shallow macro-algal zone; 2-3m, the upper portion of the urchin dominated zone; and 6-9m, the middle portion of the urchin dominated zone. The occurrence of ice-scour during two out of four years of the study allowed an assessment of its effects on biomass, diversity, and species composition of the algal community. -- In the shallow zone (0-2m) urchins had no detectable effect on macroalgal biomass. Biomass, species composition and diversity were affected, however, by the occurrence and timing of ice-scour. In the absence of ice-scour, Alaria esculenta formed a canopy which shaded the substratum; few species coexisted, and diversity was low. Winter and spring ice scour, which was temporally and spatially patchy, removed the Alaria canopy and made available well lighted rocky substratum for colonization. Scoured patches were· colonized by annual algae, resulting in an increase in diversity. Biomass returned to pre-scour levels approximately 2 mo after scouring, but diversity remained high due to the persistence of several species of annual algae in patches among the unscoured Alaria. -- In the urchin dominated zone macro-algal biomass increased following urchin removal by both manual and quicklime techniques. The upper portion of the resulting communities became dominated by Alaria esculenta, with very few co-existing species. This dominance by Alaria was also typical of the shallow zone in years during which no ice-scour occurred. Below the zone of Alaria domination (2-3m) the community became dominate~ by Desmarestia aculeata, with many other co-existent species (including Agarum cribrosum, Alaria esculenta, and Laminaria digitata). -- Algal biomass in the control area was generally low, except during the summer of 1982, when an increase in both biomass and species richness occurred. The species composition, however, differed from that on the removal transects in that the control area was dominated by annual algae such as Acrothrix novaeangliae, Chordaria flagelliformis, Dictyosiphon foeniculaceus, Ectocarpus siliculosus, and Eudesme virescens. Alaria and Desmarestia aculeata were unimportant in this association because the algae recruited in the late spring and early summer, after the period of Alaria and Desmarestia recruitment. -- Urchin biomass in the control area was greatest at 2-3m. Density was greatest in the middle of the urchin dominated zone (6-9m), where numerous juveniles occurred in crevices, and among branched and undercut encrusting coralline algae. -- In addition to urchins, the herbivore guild in the study area consisted of six species of molluscs (Acmaea testudinalis, Lacuna vincta, Margarites helicinus, Ischnochiton alba, Tonicella marmorea, and T. rubra). Densities of Acmaea and the three chitons were greatest at 6-9m. Recruitment and density of the latter three species showed no detectable relationship with urchin removal. Recruitment of the annual Lacuna and Margarites occurred during the early autumn, in shallow water, particularly in the presence of macro-algae. Survival into the following spring was greatest on the macro-algae in the urchin removal areas.


identifier: Keats, Kimberley F. <https://research.library.mun.ca/view/creator_az/Keats=3AKimberley_F=2E=3A=3A.html>   (2006) Microbial community structure in the northwest Atlantic Ocean as determined by fluorescence in situ hybridization.  Masters thesis, Memorial University of Newfoundland.

abstract: Fluorescence in situ hybridization (FISH) is widely used to characterize the phylogenetic diversity of microbial communities. Here I present the results of a laboratory-based study of the effects of sample storage on the detection of bacterial cells using FISH, as well as a field- and laboratory-based study of changes in the phylogenetic diversity of the microbial community in biogeochemical provinces of the Northwest Atlantic Ocean over three consecutive seasons, and how these changes relate to biogeochemical and ecosystem processes on a large geographical and temporal scale. Results from the 12-month time-course study of storage effects indicate that samples can be stored for up to six months with no significant change in target cell detection, and stored for up to 12 months with a minimal ( < 7%) effect of storage. Results from the Northwest Atlantic study show variations in microbial community structure between biogeochemical provinces, as well as seasonally within each province. From summer to fall, there was a noticeable decrease in the proportion of Cytophaga-Flavobacteria, and the α-, β-, and γ-Proteobacteria dominated the fall community at all stations. Seasonally, the most noticeable shift in the relative abundances of specific phylogenetic groups occurred from summer to fall. Spatially, the greatest differences in bacterial community composition were observed between the North Atlantic Subtropical Gyre and the Atlantic Arctic province.


identifier: Keddy, Joshua A. <https://research.library.mun.ca/view/creator_az/Keddy=3AJoshua_A=2E=3A=3A.html>   (2013) An analysis of artifact morphology and material frequence in eight early to middle Labrador archaic lithic assemblages from Northern Labrador.  Masters thesis, Memorial University of Newfoundland.

abstract: The lithic collections from eight early to middle Labrador Archaic sites (HeCi-11, HdCg-07, HdCh-37, HdCg-33, HdCg-19, HcCh-07, HiCj-05, and HdCh-09) were examined to determine if material and morphological trends might be recognized which relate to the cultural shift from the early to middle Labrador Archaic occupations of northern Labrador. This data was also used to explore the social and cultural variables which permeate these collections. Material frequencies within the collections were analyzed and factors including the distance from each site to the source areas of lithic types, as well as risk management within the lithic reduction process were determined to have had an impact on Labrador Archaic lithic strategies. -- Much work has been done on this region and time period and some of these changes in lithic artifact assemblages have been remarked upon, but a mathematical metric and material description of these changes does not currently exist in the extant literature. This analysis was undertaken on collections excavated over the last 40 years in order to fill in that gap and create a firm quantitative basis from which future research can be launched. Towards this end traditional measurement techniques as well as modern digital approaches to artifact analysis were undertaken in order to better understand any such morphological shifts.


identifier: Keefe, Mary <https://research.library.mun.ca/view/creator_az/Keefe=3AMary=3A=3A.html>   (2007) A survey of faculty attitudes: post-secondary students with psychiatric vs. non-psychiatric disabilities.  Masters thesis, Memorial University of Newfoundland.

abstract: Research shows that students with psychiatric disabilities attending postsecondary institutions are less likely to seek supports using the office of disability services than are students with other disabilities. One of the reasons that students give for not disclosing their disabilities is a belief that they will face stigmatizing attitudes as a result of such disclosure. While it is known that negative attitudes toward psychiatric disabilities exist within the general population, there is a paucity of research that profiles attitudes toward post-secondary students who have psychiatric disabilities, particularly in contrast to attitudes toward post-secondary students with other disabilities. The present study therefore investigated the attitudes of faculty regarding post-secondary students with psychiatric and other disabilities using an internet-based quantitative survey method. Results confirmed previous findings that attitudes toward non-visible disabilities are less positive than they are toward visible disabilities, and that within the non-visible category, attitudes toward psychiatric disabilities are more negative than they are toward learning disabilities. Attitudes were improved by providing faculty members with either a term identifying a particular type of disability or detailed disability information, suggesting that disclosure can reduce the effects of stigmatization. Several characteristics that were correlated with disability attitudes in previous studies were investigated as well. Of these, gender and access to disability information exerted the strongest influence on disability attitudes. Suggestions are given for combating the identified issues via disability training for faculty members.


identifier: Keeping, David W. <https://research.library.mun.ca/view/creator_az/Keeping=3ADavid_W=2E=3A=3A.html>   (2006) Factors influencing the career choice of students pursuing medical laboratory science training.  Masters thesis, Memorial University of Newfoundland.

abstract: The medical laboratory science profession in Canada is projecting a human resource shortage. The purpose of this exploratory study is to identify those factors which influenced the career decision-making choices of medical laboratory science students. -- A purposive sample of 17 students in a Newfoundland and Labrador medical laboratory science program were recruited and participated in semi-structured interviews. Preliminary findings from these interviews were validated through a respondent focus group. The constant comparison method was used in analyzing the data and deriving a conceptual framework describing the factors which influenced the selection of medical laboratory science. -- The results suggest the following conceptual categories represent important factors which influenced the career decision-making of medical laboratory science students: candidate personal interest; occupational characteristics; educational characteristics; resources; influential people; recruiting efforts; and baccalaureate degree educational programs. These factors have significant implications for the medical laboratory science profession, post-secondary system, policy-makers, and career counseling in efforts to promote medical laboratory science and address future health human resource shortages.


identifier: Kehoe, Amy <https://research.library.mun.ca/view/creator_az/Kehoe=3AAmy=3A=3A.html>   (2005) Isolation of cDNAs and gene expression of three feeding-related neuropeptides, neuropeptide Y (NPY), cocaine and amphetamine regulated transcript (CART) and orexin, in Atlantic cod (Gadusmorhua).  Masters thesis, Memorial University of Newfoundland.

abstract: Our understanding of the regulation of food intake in fish has evolved from experiments in the 1970's that identified feeding centres of the fish brain, to recent ones where the molecular cloning of central and peripheral factors regulating appetite is performed. In fish, food intake is regulated by the hypothalamus where neuropeptides controlling feeding are produced. Many neuropeptides have been implicated in the regulation of food intake in fish. In this study, we identified complete cDNAs encoding Neuropeptide Y (NPY) and Cocaine and amphetamine regulated transcript (CART) and a 348 bp partial cDNA of orexin from Atlantic cod (Gadus morhua) brain. There is a high degree of identity between the predicted amino acids of Atlantic cod NPY and CART and vertebrate homologs, and we found, using RT-PCR, that NPY and CART mRNA is localized not only in the brain (including the hypothalamus) but also in peripheral tissues. For example, both NPY and CART mRNA are expressed in the ovary, and NPY mRNA is also expressed in the gut, kidney and heart. We examined NPY and CART mRNA expression during a daily feeding period and following food deprivation. Peri-prandial variations were seen in both NPY and CART expression, and CART was affected by fasting. Finally, we examined the effects of environmental temperature on the control of feeding by examining NPY and CART mRNA expression in fish acclimated to 2°C, 5°C, 11°C and 15°C. Our results suggest that both NPY and CART are involved the control of food intake in cod since they are strongly expressed in the hypothalamus, an area of the brain regulating feeding, and they respond to feeding. Further, CART mRNA expression appears to be regulated by temperature whereas NPY does not.


identifier: Keilty, Shelley Anne <https://research.library.mun.ca/view/creator_az/Keilty=3AShelley_Anne=3A=3A.html>   (1993) The effects of pretesting and group discussion on reactions to an AIDS education videotape.  Masters thesis, Memorial University of Newfoundland.

abstract: The present study examined the effects of pretesting and group discussion on reactions to an AIDS educational videotape. One hundred and twenty undergraduates participated in 3-person groups of friends. Before viewing the 20-minute videotape, half of the subjects were given a pretest of their knowledge of AIDS, their attitudes about AIDS, and their estimates of risk and the importance of preventive measures for target persons in various categories. After viewing the videotape, half of the pretested and half of the non-pretested subjects engaged in discussion with their friends. Finally, all subjects completed a post-test, identical to the pretest completed earlier by half of the subjects, with the exception of a videotape knowledge questionnaire. – Group discussion, especially when it followed pretesting, made subjects more willing to accept the threat that AIDS poses to heterosexuals as well as to homosexuals. Although pretest and discussion combined to enhance subjects’ perceived understanding of the videotape material, no similar effects were found with regard to actual knowledge scores. Males and females expressed similar sympathy for a person with AIDS but males expressed less willingness to have such a person in their home. On the latter measure, group discussion made females more accepting of a person with AIDS but had little effect on the attitudes of males. Male and female groups were less likely to agree that AIDS is a gay disease and more likely to agree that a heterosexual can catch AIDS, during and after a group discussion than on their pretest. – Ratings of the risk of AIDS and the need for preventive measures were influenced by the target person’s sex, sexual orientation, and the number of sex partners. Ratings for all categories of target increased from pertest to post-test. On the post-test, differential ratings across target categories became less evident. – Several recommendations are offered concerning the most effective use of instructional materials in AIDS education programs.


identifier: Kelly, Lou-Ann <https://research.library.mun.ca/view/creator_az/Kelly=3ALou-Ann=3A=3A.html>   (2007) Examining changes in caregiving during and after the Atlantic groundfish strategy in a select Newfoundland coastal community affected by the cod moratorium.  Masters thesis, Memorial University of Newfoundland.

abstract: The purpose of this study was to compare informal caregivers in a coastal Newfoundland community during the fishery closure at two time periods: a) when The Atlantic Groundfish Strategy (TAGS), a federal government program that provided financial support for those affected was in place (phase 1) and b) after TAGS completion (phase 2). Method: This study involved secondary analysis of data collected during two time periods. The data were collected in the same geographic area at both times, using a randomly selected sample. The first set of data was collected in 1995-1997, during the first study, an interdisciplinary Eco-Research program entitled Sustainability in a Changing Cold-Ocean Coastal Environment, while individuals who were affected by the cod moratorium were receiving income support through TAGS. The second set of data was collected in 2001-2003, during the Natural Resources Depletion and Health study which was conducted after the TAGS program had been completed. The sample consisted of individuals who identified themselves as 1) main informal caregivers: caregivers of an adult(s) or child(ren) with a health problem and 2) elderly supporters: those providing an elderly relative over age 65 with assistance. Structured face-to-face interviews were conducted by trained local interviewers. Data were collected using a survey questionnaire (Appendix A) and the abbreviated General Health Questionnaire (GHQ) (Appendix B). Quantitative data were analyzed using the Statistical Package for the Social Sciences (SPSS), windows version. The t-test was used for all continuous data and the non-parametric Chi-Square test was used for ordinal data. Descriptive statistics were also provided. -- Results: This study revealed that there was no change in the percentage of informal caregivers between phases, however, the proportion of elderly supporters decreased significantly during phase 2 (p = 0.008). The demographic characteristics of both phases showed that the majority of main informal caregivers were female (phase 1, 51.98%; phase 2, 56.18%) in their mid forties. In phase 2, employment increased for both main caregivers (p = 0.001) as well as elderly supporters (p = 0.027). The psychosocial health, measured by the abbreviated General Health Questionnaire, of both main informal caregivers and elderly supporters showed no significant change between both phases of the study. When comparing stress level at the time of the interviews with that of three years before the interviews, stress levels of main caregivers remained unchanged, however, stress levels of elderly supporters decreased significantly in phase 2 (p = 0.044). The perceived physical and mental health as well as life satisfaction of main caregivers and elderly supporters also improved in phase 2. Since informal caregiving in the Bonavista Headland was done mostly by women and although limitations exist in the study design, this research raises important questions about the health and well being of rural informal caregivers as well as the care recipients as the population of rural Newfoundland is aging much more rapidly than the rest of Canada. Furthermore, the results may have direct implications for nursing practice and policy development and provide support for the need for a more specific strategic plan to care for the elderly in this province and provide support for informal caregivers.


identifier: Kelly, Melodie <https://research.library.mun.ca/view/creator_az/Kelly=3AMelodie=3A=3A.html>   (2005) Women, home care and social change in a rural Newfoundland community.  Masters thesis, Memorial University of Newfoundland.

abstract: This thesis is an examination of women and social change in a rural Newfoundland fishing community. Social change is documented and is investigated through the shift in women's employment from the fishery to home care. This thesis argues that the groundfish moratorium, coupled with shifts in governmental health care policy, has radically reconfigured the nature of women's social space in rural Newfoundland society and created a complex medical and social scenario. The move to home care, as an economic and health issue, is one which provides some social advantages to workers and clients but also one that remains financially exploitative and medically suspect.


identifier: Kelvin, Laura Elena <https://research.library.mun.ca/view/creator_az/Kelvin=3ALaura_Elena=3A=3A.html>   (2011) The Inuit-Metis of Sandwich Bay: oral histories and archaeology.  Masters thesis, Memorial University of Newfoundland.

abstract: During the nineteenth century the Inuit-Metis, Inuit and migratory fishermen in southern Labrador constructed and lived in similar sod dwellings. On the surface, the archaeological remains of these dwellings are almost identical, making it difficult to determine the ethnicity of the occupants. To date only one known Inuit-Metis sod dwelling has been excavated and further research is needed to determine how Inuit-Metis ethnicity can be identified in the archaeological record. Focusing on Sandwich Bay, Labrador, this thesis combines oral histories, archaeology, and documentary evidence to examine the lifeways of the Inuit-Metis’s ancestors and to determine how their ethnicity transcends to the archaeological record in comparison to Inuit and European ethnicities.


identifier: Kendall, Jamie <https://research.library.mun.ca/view/creator_az/Kendall=3AJamie=3A=3A.html>   (2003) Coumarin-fused azadienes: new dienes for the IEDDA reaction.  Masters thesis, Memorial University of Newfoundland.

abstract: Coumarin-fused 1-azadienes were prepared via a condensation between 3-formylcoumarin and a variety of amines. Coumarin-fused 2-azadienes were prepared via a condensation of 3-aminocoumarin and a variety of aldehydes. A new synthesis of 3-aminocoumarin was developed. -- 1,2-Imine addition products were observed when 1-azadiene 184 was reacted with enamine 134. This reaction resulted in the formation of reduced aldol condensation product 242 (37%) and the desired Diels-Alder adduct 243 (1% yield). When 1-azadienes 186 and 187 were reacted with enamine 134, aldol condensation product 250 was formed (53% yield with 186 and 77% yield with 187). When 2-azadiene 222 was reacted with enamine 134, compound 252 (95%), which is also the result of 1,2-addition, was formed. -- Using modified Povarov reaction conditions with the 2-azadienes, cycloaddition products were isolated. Two procedures were employed. The first one involved the use of a preformed 2-azadiene, a catalytic amount of Yb(OTf)₃, a non-enamine dienophile in acetonitrile. The other procedure was a three-component (in situ generated diene) method that entailed the combination of 3-aminocoumarin 212, a catalytic amount of Yb(OTf)₃, a non-enamine dienophile and an aldehyde. An endo and exo isomer was obtained in most cases with selectivity ranging from >95 : 5 in favor or exo to >95 : 5 in favor of endo. Two of the Povarov adducts were oxidized with bromine to produce pyrido[2,3-c ]coumarins.


identifier: Kendall, Mary Simone <https://research.library.mun.ca/view/creator_az/Kendall=3AMary_Simone=3A=3A.html>   (2005) Weathering the storm: survival strategies after the cod crisis in Ramea, NL.  Masters thesis, Memorial University of Newfoundland.

abstract: The economic restructuring which followed the cod moratorium of 1992 forced hundreds of rural communities and thousands of families into a situation that they were unprepared for and ill-equipped to deal with. For many communities the cod fishery was their sole reason for existence. However, despite this economic crisis, some communities have survived into the 21st century. Ramea, a community on the southwest coast of Newfoundland, is one such community. While there has been a lack of long-term employment available in Ramea, individuals and families who remained there have coped. In light of these circumstances, the economic actions or "survival strategies" are explored and compared to a number of competing economic theories. In addition, individual's social relations, community social structure and the general culture are examined in terms of how they influence individuals' ability to cope.


identifier: Kennedy, Brian <https://research.library.mun.ca/view/creator_az/Kennedy=3ABrian=3A=3A.html>   (2006) Le colportage d'un nouveau printemps: le reflet littéraire de l'idéologie de la Révolution tranquille dans Le libraire de Gérard Bessette et Une saison dans la vie d'Emmanuel de Marie-Claire Blais.  Masters thesis, Memorial University of Newfoundland.

abstract: La fierte nationale et Ia secularisation ardente qui caracterisent le Quebec d'aujourd'hui resultent d'une transformation sociale rapide qu'a subie cette province aux annees 1960. Un enchalnement d'evenements complexes, connu sous le nom de Ia Revolution tranquille, a provoque une evolution ideologique contre le conservatisme et le traditionalisme, deux piliers de Ia pensee quebecoise depuis 1760. La premiere section de ce memoire examine les autorites conservatrices qui tenaient les renes du pouvoir au Quebec aussi bien que le developpement d'une situation sociopolitique repressive qui a rendu inevitable Ia revolution sociale. -- De plus, Ia Revolution tranquille avait un element litteraire puisque de nombreux ecrivains, ayant le desir de changer, se sont presentes comme defenseurs et promoteurs de ce mouvement societal. La deuxieme section examine comment cet engagement des auteurs a contribue au developpement d'un parallele litteraire qui reflete le changement ideologique social. Dans leurs reuvres, les ecrivains reformateurs ont attaque les fondations de l'autoritarisme et du traditionalisme qui ont entrave le developpement social du Quebec pendant deux cent ans. Ces textes ont ete un outil indispensable dans Ia lutte contre le conservatisme repandu dans Ia societe quebecoise. -- La troisieme section du memoire examine deux romans en particulier, Le libraire de Gerard Bessette et Une saison dans Ia vie d'Emmanuel de Marie-Claire Blais, qui ont donne une voix au mouvement reformateur et un nouvel espoir aux Quebecois. Ces romans ont propage les memes idees modemes, telles que Ia critique de l'autoritarisme sociopolitique et Ia primaute de l'individu, qui etaient les composants centraux de l'ideologie de Ia Revolution tranquille. -- -- During the 1960s, Quebec underwent a significant social transformation that brought about the fierce national pride and the ardent secularization that characterize it today. A series of complex events, collectively referred to as the Quiet Revolution, would spark this ideological evolution, leading to a movement away from the conservatism that had been the mainstay of Quebecois thought since 1760. The first section of this thesis examines the conservative forces that held the reins of power in Quebec as well as the development of a stifling and repressive sociopolitical situation that made social revolution inevitable. -- The Quiet Revolution had a literary component as well, as many authors possessing a strong desire for social reform supported it. The second section examines how this auctorial engagement led to the development of a parallel literary trend reflecting the societal shift in ideologies. In their works, writers attacked the foundations of the authoritarianism that had impeded Quebec's social development for two hundred years. Reformist literature would prove to be an invaluable tool in the struggle to shake Quebec from its staunch traditionalism. -- The third section examines how two novels in particular, Le libraire by Gerard Bessette and Une saison dans Ia vie d'Emmanuel by Marie-Claire Blais, gave a voice to the reform movement and a new hope to the people of Quebec. These novels contained the same modern notions, such as the criticism of sociopolitical authoritarianism and the primacy of the individual, that were central components of the Quiet Revolution ideology.


identifier: Kennedy, Carla Maria <https://research.library.mun.ca/view/creator_az/Kennedy=3ACarla_Maria=3A=3A.html>   (2008) The physical properties of the Lac de Gras kimberlites and host rocks with correlations to geophysical signatures at Diavik Diamond Mines, NWT.  Masters thesis, Memorial University of Newfoundland.

abstract: The geophysical response of any target is dependent upon the physical properties of the body and the surrounding host rock. The objective of this study is to develop an understanding of the physical properties of the kimberlites and host rocks at the Diavik Diamond Mine. Physical property data were collected at the Diavik Diamond Mine during a Mathematics of Information Technology and Complex Systems (MITACS) internship with Diavik. Data was collected using equipment supplied by Aurora Geosciences Ltd. The physical properties measured include density, resistivity, magnetic susceptibility and remanent magnetization. Samples were collected from drill core from previous drill programs that took place on Diavik property. In total, 400 kimberlite and surrounding host rock samples were collected from 16 kimberlite pipes. Pipes were selected based on core quality and pipe location. -- The physical property data was statistically analyzed. Then, magnetic and gravity forward models of pipe A154N were made using GRAV3D (UBC-GIF 2002) and MAG3D (UBC-GIF 2002) software packages. These models were based on the data collected, along with a constrained geometric model of kimberlite pipe A154N given by Diavik. These forward models were compared to collected total magnetic field and gravity ground data which underwent a regional/residual separation using Li and Oldenburg's Method (1998). MAG 3D and GRAV3D inversion software was then used to invert the residual data. The resulting subsurface models created by the inversion were then compared to the known model of pipe A154N. -- After studying the physical properties and modeled geophysical signatures of pipe A154N, airborne total magnetic field data over the pipe was reviewed. Directional filters and edge detection techniques were tested to see how successful these methods were in helping to define the pipe A154N anomaly both on a large-scale map and in profiles over the pipe.


identifier: Kennedy, Kristi E. <https://research.library.mun.ca/view/creator_az/Kennedy=3AKristi_E=2E=3A=3A.html>   (2007) Fingering instabilities in Newtonian and non-Newtonian fluids.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Fingering has been studied in different fluid systems. Viscous fingering, which is driven by a difference in viscosity between fluids, has been studied by both experiments and numerical simulations. We used a single fluid with a temperature dependent viscosity and studied the instability for a range of inlet pressures and viscosity ratios. The spreading and fingering of a fluid drop subjected to a centrifugal force, known as spin coating, has also been studied for a range of drop volumes and rotation speeds, both for a Newtonian and a non-Newtonian fluid. -- Experiments on viscous fingering with a single fluid, glycerine, show that an instability occurs at the boundary separating hot and cold fluid. The results indicate that the instability is similar to that which occurs between two miscible fluids. Fingering only occurs for high enough values of the inlet pressure and viscosity ratio. The wavelength of the fingering pattern is found to be proportional to the cell width for the two smallest cell widths used. The fingering patterns seen in the simulations are very similar to the experimental patterns, although there are some quantitative differences. In particular, the wavelength of the instability is seen to depend only weakly on the cell width. -- The spreading of silicone oil, a Newtonian fluid, during spin coating follows the time dependence predicted theoretically, although with a shift in the scaled time variable. Once the radius of the spreading silicone oil drop becomes large enough, fingers form around the perimeter of the drop for all experimental conditions studied. The number of fingers and the growth rate of the fingers are in agreement with theoretical predictions. Fingers are also observed to form for high enough drop volumes and rotation speeds during the spinning of a non-Newtonian fluid drop, Carbopol, which possesses a yield stress. In this case the fingering is a localized effect, occuring once the stress on the drop exceeds the yield stress, rather than the result of an instability as in the Newtonian case.


identifier: Kennedy, Susan Carmel <https://research.library.mun.ca/view/creator_az/Kennedy=3ASusan_Carmel=3A=3A.html>   (2012) Miocene to recent evolution of the Cilicia Basin with emphasis on the Pliocene-Quaternary sedimentary relationship between the Goksu river and the Cilicia Basin: a quantitative study of volumetrics, subsidence in the Cilicia Basin and concomitant uplif.  Masters thesis, Memorial University of Newfoundland.

abstract: Mountain building occurs at convergent plate margins once oceanic lithosphere has been subducted and continental lithosphere from one plate collides with continental lithosphere from the other. Intermontane plateaux develop during orogenesis and their uplift is accompanied by erosion and the transport of sediments within the plateau and out beyond their margins into adjacent seas. The histories of uplift, erosion and deposition shed light on the geodynamic processes involved. The Central Anatolian Plateau results from the active collision of the African and Eurasian plates, with the Aegean-Anatolian microplate caught in between. An international research program is currently studying the uplift and erosion history of the plateau and surrounding mountains. The research in this thesis complements the terrestrial research with estimates of the sediment deposited from the plateau and adjacent Taurus Mountains into the ‘sink’ of the Cilicia Basin in the eastern Mediterranean. The research is based on the interpretation of seismic reflection profiles run across marine sediments that are contributed by the Goksu River - the main distributary at the southern side of the Taurus Mountains. -- On the western shelf-edge of the Inner Cilicia Basin, immediately seaward of the Goksu River, the Pliocene-Quaternary sedimentary successions arc composed of a number of stacked, prograded delta successions which overlie Messinian evaporites and pre-Miocene basement. The architecture of these deltas shows clear east- and south-east prograded clinoform reflections and this strongly suggests that they were sourced from the Goksu River. Further examination of seismic reflection profiles from the Cilicia Basin confirms the presence of additional vertically stacked and prograded delta packages with southwest-directed clinoform reflections a long the northeastern edge of the basin, immediately seaward of the larger Scyhan. Ceyhan and Tarsus Rivers. The particular architecture of these packages strongly suggests a northern source. The main focus of this study has been to examine the nature of the sedimentary by-products of the Goksu River and the rates and modes of deposition through time, particularly during the Pliocene and Quaternary. Two chronostratigraphic boundaries arc defined corresponding to dated horizons observed in exploration wells: (i) the M-reflector (defining the top of the Messinian i.e. 5.3 Ma) and (ii) the A-reflector (Early-Late Pliocene boundary i.e. 3.6 Ma). A third boundary, the P-reflector, occurs within the Quaternary successions and was also used in the analysis. The age of this boundary is tentatively assigned to be 1.9 Ma. The volumetrics of these three intervals (i.e. M- to A-reflector, A- to P-reflector and P-reflector to seabed) were calculated to determine the differential rates of sedimentation into the Cilicia Basin throughout the Pliocene-Quaternary. To conduct the analysis, the sedimentary volumes were separated in to contributions from the Goksu River in the west versus the Seyhan, Ceyhan and Tarsus Rivers to the north. The total resultant volume of sediment assumed to arrive into the Cilicia Basin during the Pliocene and Quaternary from the Goksu River was found to be ~6305 km³, somewhat in excess of the volume of sediments eroded from the Goksu gorge of ~5789 km³, i.e. 92% of the sediments are accounted for. The remainder must come from the Taurus Mountains and the Central Anatolian Plateau to the north. The volume of sediments contained in each interval was converted in to an average sedimentation on rate and compared with the present-day sedimentation rate of the Goksu River. The sedimentation rates of the three intervals we re found to be: (i) 6.45 x 10⁶ tonnes/y r for the interval bound by the M- and A-reflectors, (ii) 2.67 x 10⁶ tonnes/yr for the interval bound by the A- and P-reflectors and (iii) 8.33 x 105 tonnes/y r for the interval bound by the P-reflector and the seabed. The present-day rate of sedimentation by the Goksu River is reported to be 2.16 x 10⁶ tonnes/yr. These results show that sedimentation in the Early Pliocene interval l was significantly greater than it is today, suggesting a more rapid period of uplift along the adjacent landmass, with sedimentation rates likely slowing in the Late-Pliocene-Quaternary as uplift rates fell. -- The analysis of the sedimentary volumes arriving into the Cilicia Basin contained in each interval brought out two additional conclusions. Firstly, the temporal offset toward the southwest of the locus of progressively younger delta lobes known to be sourced by the Goksu River allowed for a conservative estimate of sinistral slip along the offshore component of the Kazan Fault Zone between 0.6- 1.0 cm/yr. This fault is a splay of the sinistral East Anntolian Transform Fault that forms the eastern boundary of the Aegean-Anatolian Pl ate. There are no slip rate estimates available for the Kazan Fault on land; however, the slip rate estimated is compatible with estimates for the adjacent Ecemis Fault Zone. Secondly, the buried topset-to-foreset transitions of the dated deltas allowed for some estimates of subsidence a long the western shelf-edge of the Inner Cilicia Basin. Subsidence rates in this region were found to decrease from ~0.6-0.8 mm yr⁻¹ in the Early Pliocene interval to ~0.10-0.20 mm yr⁻¹ in the Late Pliocene-Quaternary interval. The subsidence is concomitant with the uplift of the plateau and Taurus Mountains and it is suggested that the subsidence results from the thrust load of the adjacent and thickened Taurus Mountains. The suggestion of others that the plateau uplift is caused by the collision of seamounts with the subduction zone south of Cyprus is incompatible with the observed subsidence of the Cilicia Basin in the Pliocene and Quaternary.


identifier: Kennedy, Victor S. <https://research.library.mun.ca/view/creator_az/Kennedy=3AVictor_S=2E=3A=3A.html>   (1964) Aspects of the biology of the winter flounder, Pseudopleuronectes Americanus (Walbaum) in Long Pond, Conception Bay, Newfoundland.  Masters thesis, Memorial University of Newfoundland.

abstract: From November 1962 to October 1963, samples of winter flounder, Pseudopleuronectes americanus (Walbaum) were taken in Long Pond, Newfoundland. Found in shallow water (1-2 m.) from November until June, the flounder moved into deeper water (7-10 m.) during the summer and returned to shallow water in September and October. These movements out of and into shallow water corresponded with the end of the spawning season and the ripening of the gonads respectively. -- Flounder spawned from at least March until early June with the peak of activity in May and early June. Males ripened one or two weeks before females. The females were very fecund and there were great variations in fecundity for different individuals within the length, weight and age groups present. -- Most males were mature at age y and most females at age 7. 50% of the males and females were mature at 21 and 25 cm. respectively. The growth rates for males and females were similar until age 8 after which females outgrew the males. Growth was slower in Long Pond than in areas to the south. The length-weight relationships for males and females were similar. -- No feeding took place in December or January but flounder were feeding in March and continued throughout the summer with a decrease in food intake in the fall. They were omnivorous and the type of food eaten varied with the locality. Polychaetes and molluscs were important throughout the year.  Capelin eggs and fish remains occurred only during a few months of the year but were eaten in great quantities. -- Polychaetes, winter flounder eggs and arthropods were not as important to the large fish as they were to the small. Capelin eggs and fish remains were eaten in quantity by the larger fish. The amount plant material ingested increased and debris decreased with increasing size. -- A trematode and a nematode were parasitic in the gut of winter flounder.


identifier: Kennett, Brenda L. <https://research.library.mun.ca/view/creator_az/Kennett=3ABrenda_L=2E=3A=3A.html>   (1990) Phillip's Garden East: an examination of the Groswater Palaeo-Eskimo phase.  Masters thesis, Memorial University of Newfoundland.

abstract: This thesis is based on the excavation of Phillip's Garden East (EeBi-1), a Groswater Palaeo-Eskimo site situated on the west coast of the Great Northern Peninsula of Newfoundland. The site is interpreted as a seasonal camp occupied by Groswater groups during the late winter and spring and focused primarily on the exploitation of the harp seal migration. Occupation of the site appears to have recurred over a period of approximately 800 years. -- Phillip's Garden East provides important new information on the Groswater phase. The large artefact assemblage contains the first Groswater organic artefacts including a number of harpoon heads. The recovery of an extensive faunal collection is also unique to this Groswater site. Certain artefact traits, a semi-subterranean house feature and a series of ca. 1900 B.P. dates from the site appear anomalous in the Groswater context as it is presently defined. Taken together, the data from the site necessitate a re-examination of Groswater material culture, settlement and subsistence, and culture history. -- The definition of Groswater material culture is broadened to include a number of artefact traits previously excluded from the standard Groswater trait list. Eight radiocarbon dates on charcoal cover the period from ca. 2700 B.P. to ca. 1900 B.P. thus prolonging the Groswater phase by approximately 200 years. The site location and faunal collection suggest a strong maritime focus in at least part of the Groswater economy. The new dates, certain artefact traits and raw material use patterns may indicate limited contact between Groswater and Early Dorset groups in Labrador and Middle Dorset in Newfoundland. -- In a broader context, the enhanced definition of Groswater material culture supports earlier suggestions of close ties between Groswater and Independence II but also points towards similarities with a wide range of late Pre-Dorset and Early Dorset sites from across the Eastern Arctic.


identifier: Kenny, Shawn Patrick <https://research.library.mun.ca/view/creator_az/Kenny=3AShawn_Patrick=3A=3A.html>   (1992) The influence of damage on the creep behaviour of ice subject to multiaxial compressive stress states.  Masters thesis, Memorial University of Newfoundland.

abstract: Medium-scale indentation tests, such as Pond Inlet (1984) and Hobson’s Choice Ice Island (1989, 1990), have shown that during rapid crushing events the failure zone can be characterized by distinct sub-regions. The behavior of the damaged ice and crushed material located at hard spots or ‘critical zones’ of moderate to high confining pressures during interaction events is seen as the key to dynamic fluctuations in load and local peak pressures. – Consequently, an experimental program investigating the influence of microcracks on the creep response of polycrystalline, granular freshwater ice subject to hydrostatic confinement was conducted. The main objective of the test program was to better understand the creep behavior of damaged ice generated at the contact zone during ice-structure interactions. A series of compressive stress pulses, which ranged from 0.3 MPa to 2.6 MPa, were applied to intact and pre-damaged samples under confining pressures of 0, 4, 10 and 20 MPa. The damage state was nominally uniform for all tests which was developed by loading the ice sample at a constant displacement rate of 10⁻⁴ s⁻¹ to 2% axial strain. – Although the elastic response was marginally influenced by the pre-damaging path, the magnitude and rate of creep strain was significantly enhanced independently of the hydrostatic pressure. Also, the creep deformation was non-linear with applied deviatoric stress and exhibited a tendency for viscous processes to dominate at higher load levels. One of the key findings was the magnitude of lateral strain, hence volumetric deformation, and shear strain developed independently of the confining pressures investigated. The considerable enhancement and non-linearity of creep strain evident in the experimental program has significant implications when considering full-scale events. Furthermore, the findings point to possible simplifications to ice-load models and constitutive relationships that may be utilized in continuum analysis of ice-structure interaction.


identifier: Kenny, Sophie Sylvie <https://research.library.mun.ca/view/creator_az/Kenny=3ASophie_Sylvie=3A=3A.html>   (2012) Action concepts and the enactment effect.  Masters thesis, Memorial University of Newfoundland.

abstract: When action lists are presented, participants do better on memory tests if they perform the action described while learning than if they remain still (Engelkamp & Krumnacker, 1980). According to the multimodal memory theory, this enactment effect originates at encoding, when motor information enriches the memory trace, leading to better performance at test (Engelkamp, 1998). In this thesis, a limiting condition for motor encoding to enhance memory for abstract arm motions was assessed: This was a test of the necessity of pre-existing action concepts for motor encoding to occur. A pilot study and three critical experiments were completed. The pilot study informed the design of the stimuli used throughout the thesis. Experiment I assessed the presence of an enactment effect with a recognition test. An enactment effect was demonstrated, but the re was no interaction with conceptual processing. Experiment 2 tested whether the enactment effect would be also be obtained in recall, in the absence of action concepts. Contrary to Experiment I, the enactment effect was not obtained. Experiment 3 replicated Experiment 2, with the change that conceptual processing was facilitated. The enactment effect was not obtained with this experiment either. The data provided mixed evidence for the multimodal memory theory, but one thing is clear: Action concepts are important for motor encoding, but not as specified by Engelkamp.


identifier: Keough, Trent <https://research.library.mun.ca/view/creator_az/Keough=3ATrent=3A=3A.html>   (1988) 'When story people become flesh': character and identity in the fictions of Jack Hodgins.  Masters thesis, Memorial University of Newfoundland.

abstract: Criticism of the works of Jack Hodgins ranges from conventional evaluation of imagery, theme, and conflict, to debates about the genre implied by his artistic of literary style Generalization is the common weakness of most of the exegeses of Hodgins’ fiction. – Hodgins’ writings, as a group, offer a contemporary example of psychological realism. Instead of assuming, as the traditional realist would, that the Vancouver Islander is a complex multi-dimensional amalgamation of various persons, Hodgins describes him or her as one-dimensional. Single dimensionality does not, however, limit the psychological complexity of the individual character. Through an examination of the identity crisis Hodgins posits that within the many roles a character plays there lies but one identity. – To read the works of Jack Hodgins is to witness the development and destruction of character identity. Characters gather a sense of meaningful existence from their own single-dimensionality only after moving from one or more of four possible states of personal being.


identifier: Keshavarz, Ghaffar <https://research.library.mun.ca/view/creator_az/Keshavarz=3AGhaffar=3A=3A.html>   (2011) Fire and explosion consequence modeling in the arctic region.  Masters thesis, Memorial University of Newfoundland.

abstract: Pool fires and explosions are among the most frequent accidents in process facilities. For pool fires, flame impingement and thermal radiation are main hazardous characteristic. Whereas, overpressure and negative pulse duration are the main treats to human and assets in the case of explosions, Environmental variables significantly affect the behavior of fires and explosions. However, the effect of environmental parameters in the cold regions like arctic has not been sufficiently studied. This study presents two new models. A steady state and fully developed pool fire model that takes into account the effects of all environmental variables like temperature, the presence of droplets and surface reflexivity on the thermal radiation and subsequently on the fire consequence assessment. Another model has been proposed to account the effect of snow layers on explosion overpressure. A detailed description of model development and solution methodology are presented in the thesis.


identifier: Khalil, Mohamed Wahid <https://research.library.mun.ca/view/creator_az/Khalil=3AMohamed_Wahid=3A=3A.html>   (1974) Studies on the pigments of some plasmodial slime moulds.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Gel permeation chromatography on Sephadex LH-20 and G-10 in aqueous alcoholic solvents has provided a nondestructive method of isolating a consistent pigment preparation from Physarum flavicomum (pigment A-2) and Physarum polycephalum (pigment 3). Both pigments have 'indicator properties' and correspond to substances implicated in light-induced sporulation of several slime moulds. Pigment A-2 (P. flavicomum) has been shown to be homogeneous from electrophoresis studies. The unusual, reversible bathochromic shift of the visible absorption spectrum on protonation is described. Analysis suggests an empirical formula C₁₂H₁₃NO₅ for the protonated pigment. The pigment is not a Schiff's base, contains no amino acids, has a modified polyene chromophore and a molecular weight corresponding to at least twice the empirical formula. Catalytic hydrogenation gives a colourless compound with a pH dependent ultraviolet absorption spectrum which is probably due to the presence of a substituted 2,4-pyronone chromophore. A partial structure based on spectroscopic and analytical data and chemical degradation is proposed.


identifier: Khalili, Sammy <https://research.library.mun.ca/view/creator_az/Khalili=3ASammy=3A=3A.html>   (2012) Nutritional regulation of adiponectin and the effect of genetic variations in the adiponectin gene on bone density in the Newfoundland population.  Masters thesis, Memorial University of Newfoundland.

abstract: Adiponectin, as an adipokine, has been shown to be involved in insulin sensitivity and obesity. Recently data mainly from animal models, have suggested that adiponectin may have a role in bone metabolism. This project addresses the association of adiponectin with insulin sensitivity and obesity status, the regulation of positive energy challenge on adiponectin, and the association of DNA sequence variation in adiponectin gene with bone mineral density in the Newfoundland population. This project comprises two studies: I) a Newfoundland-population based-genetic-association cohort study and 2) an overfeeding study.


identifier: Khan, Md. Abdesh Shafiel Kafiey <https://research.library.mun.ca/view/creator_az/Khan=3AMd=2E_Abdesh_Shafiel_Kafiey=3A=3A.html>   (2006) A wavelet packet transform based on-line technique for the protection of three-phase interior permanent magnet motors.  Masters thesis, Memorial University of Newfoundland.

abstract: Interior permanent magnet (IPM) synchronous motors are attractive for a variety of applications because of their high electromagnetic torque per permanent-magnet volume, high efficiency, low noise and low cost with a high power factor. However, interior permanent magnet motors are subject to time-to-time transients primarily due to faults and switches of loads. As a result, it is very important to understand the IPM motor's response to any potential fault condition in order to prevent fault-induced damage to the motors or to the connected loads. There have been many proposed techniques to carry out the protection of interior permanent magnet motors. These techniques include the harmonic content analysis of line currents using the fast Fourier transform (FFT), dq modeling of !PM motors relative to the faults, and pattern recognition of fault currents using the artificial intelligence techniques such as expert systems (ES), artificial neural networks (ANN), fuzzy logic systems (FLS), genetic algorithm (GA) and support vector machine (SVM). However, output signals of the running machine often contain nonstationary components and the FFT-based methods are not suitable for the non-stationary signal analysis. Moreover, there have been few efforts in the experimental implementation of dq modeling based protection of interior permanent magnet motors. Furthermore, pattern recognition techniques require a large number of data files for offline training and have computational complexity, which may affect the reliability and speed of operation of these protection techniques. In this work, a wavelet packet transform based algorithm for the protection of the interior permanent magnet motor is developed, implemented and tested on-line on two types of interior permanent magnet motors using the DS 11 02 digital signal processor board. In the proposed algorithm, a signature analysis method is used for extracting the features of fault currents. For this purpose, three-phase line currents of different faulted and normal unfaulted conditions are acquired through the three-channel A/D converters of the DS1102 digital signal processor board, and then these are decomposed off-line up to the second level of resolution of the wavelet packet transform. The second level high frequency details (dd²) only show the distinctive features between faulted and normal unfaulted (healthy) currents. So, the proposed wavelet packet transform based algorithm is dependent upon the identification of high frequency components or coefficients in the second level high pass filter output. The output of cascaded filter banks associated with the selected mother wavelet and number of levels of resolution produce details and approximations of the original signal, which are related to high frequency and low frequency components, respectively. An experimental setup is developed for collecting line currents of different faulted and normal (unfaulted) conditions in order to select the optimum mother wavelet and optimal number of levels of resolution in addition to off-line testings of the proposed algorithm. It is found that the mother wavelet 'db3' of the Daubechies family and the second level of resolution are adequate enough to discriminate fault currents from the normal unfaulted currents. The off-line testing of the proposed algorithm is performed in the MATLAB environment on the collected data from both types of interior permanent magnet motors. An experimental setup for detecting disturbances incorporating also the protection circuit is developed to accommodate on-line testings on both types of IPM motors. In all the tests carried out, the proposed algorithm identified disturbances properly and initiated a trip signal almost at the instant or within one cycle of the fault occurrence. The on-line testing results are consistent with those obtained from off-line testings. The real-time testing of the proposed algorithm is also extended on the inverter-fed interior permanent magnet motor to demonstrate the universality of the proposed wavelet packet transform (WPT)-based protection algorithm for either the line-fed or inverter-fed three-phase interior permanent magnet motors.


identifier: Khan, Amir Ali <https://research.library.mun.ca/view/creator_az/Khan=3AAmir_Ali=3A=3A.html>   (2006) Evaluation of uncertainties in MOFAT for Tier 3 RBCA.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Please see thesis for abstract.