The presence of inter-area oscillations has long affected stability constraints, and therefore, limited the power transfer capacity of interconnected power systems. Adequate damping of these inter-area oscillations is, thus, necessary to secure system operation and ensure system reliability while increasing power transfers. Power system stabilizers (PSS) are the most common devices used to enhance the damping of such oscillations. Many studies have demonstrated that PSSs using remote signals may perform better than using local signals. The advent of phasor measurement units (PMU) makes remote or wide-area signals become available, which enables various important applications. Of particular interest is wide-area damping control (WADC), which aims to utilize remote or wide-area measurements to damp the inter-area oscillations. However, two main challenges in WADC design are (1) feedback controller input signal selection (which PMU signal is best to use?), and (2) latency (which is inherent in the transmission of the measurements) considerations. In response to the first challenge, this thesis proposes a concept called dominant inter-area oscillation path, which serves to pinpoint a set of candidate signals that can be used as the feedback controller inputs by locating the interconnected corridors where the inter-area modal contents are the most observable. Derivation, identification, and use of the dominant inter-area oscillation paths are demonstrated throughout the thesis. Extensive analysis on the relationships between the proposed set of signals and system properties regarding stability and robustness is presented. To tackle the second challenge, the impacts of time delays on the system performance when using the dominant path signals are investigated. To date, several studies have proposed different control design methods using various oscillation dampers to design WADC. Nevertheless, neither a systematic method nor a concept that encompasses fundamental knowledge on power system dynamics has yet been offered. The objective of this thesis is, thus, to propose an analytical framework based on the dominant path concept which is built upon fundamental principles for feedback controller input signal selection in WADC. With this framework, a proper and systematic approach is developed. The proposed method allows to select appropriate signals and use them to effectively mitigate the inter-area oscillations that constrain power transfer capacity and affect system stability. / <p>QC 20150414</p>

Nursing students in South Africa are exposed to various clinical environments as part of the prescribed curriculum (SANC, 2008). These clinical environments not only positively or negatively influence nursing students but also greatly influence their decisions regarding future specialization. This relationship between the influence of the clinical environment and the decision to apply at a specific hospital was established by Andrews et al. (2005:147), but little is known about how it affects the decision of nursing students to specialize in a specific area. According to the South African Nursing Council‟s statistical data, an additional qualification in operational theatre is one of the least qualifications applied for (SANC, 2012b). This indicates that not many nursing students choose, for example, the theatre as a specialization area when their studies are completed. In light of this evidence, this study aimed to explore the influence that the clinical environment has on the decision of nursing students to specialize in a specific area. An explorative and descriptive design, which is qualitative in nature, was followed to conduct this study. The data collection was conducted in two phases. Phase one: Nursing students‟ experiences after exposure to theatre as a clinical environment were explored by means of reflective essays. Data was analysed according to the principles of Tesch as described in Creswell (1994:154). Meetings between the researcher and an experienced co-coder resulted in consensus regarding the findings. Three main themes and eleven sub themes were identified and provided clarity on the influence of the clinical environment on nursing students. Phase two, consisting of two focus group discussions facilitated by an expert in focus group facilitation, was completed to validate the findings from the reflective essay. This data was transcribed, analysed and the findings validated by the existing data from phase one. Conclusions drawn from this study were that the clinical environment does influence the students‟ decision to specialize in operating theatre, but many choose not to specialize in theatre due to personal preferences. / MCur, North-West University, Potchefstroom Campus, 2014

Nursing students in South Africa are exposed to various clinical environments as part of the prescribed curriculum (SANC, 2008). These clinical environments not only positively or negatively influence nursing students but also greatly influence their decisions regarding future specialization. This relationship between the influence of the clinical environment and the decision to apply at a specific hospital was established by Andrews et al. (2005:147), but little is known about how it affects the decision of nursing students to specialize in a specific area. According to the South African Nursing Council‟s statistical data, an additional qualification in operational theatre is one of the least qualifications applied for (SANC, 2012b). This indicates that not many nursing students choose, for example, the theatre as a specialization area when their studies are completed. In light of this evidence, this study aimed to explore the influence that the clinical environment has on the decision of nursing students to specialize in a specific area. An explorative and descriptive design, which is qualitative in nature, was followed to conduct this study. The data collection was conducted in two phases. Phase one: Nursing students‟ experiences after exposure to theatre as a clinical environment were explored by means of reflective essays. Data was analysed according to the principles of Tesch as described in Creswell (1994:154). Meetings between the researcher and an experienced co-coder resulted in consensus regarding the findings. Three main themes and eleven sub themes were identified and provided clarity on the influence of the clinical environment on nursing students. Phase two, consisting of two focus group discussions facilitated by an expert in focus group facilitation, was completed to validate the findings from the reflective essay. This data was transcribed, analysed and the findings validated by the existing data from phase one. Conclusions drawn from this study were that the clinical environment does influence the students‟ decision to specialize in operating theatre, but many choose not to specialize in theatre due to personal preferences. / MCur, North-West University, Potchefstroom Campus, 2014

Background: The health care systems across are characterised by the gross shortage of nurses. A number of initiatives have been reported which seek to address this challenge. Literature shows that males remain an inadequately tapped source, They remain a minority in nursing compared to their female counterparts. Literature also shows that gender-based barriers for male nurses exist. The purpose of this study was to explore gender-related constructs that influence the recruitment and retention of men in nursing as experienced by male nurses in three selected hospitals in the eThekwini district. Research Methodology: A qualitative, explorative and descriptive design was used in this study to illuminate the views of male nurses regarding their recruitment and retention in nursing .. Purposive sampling was used to select male nurses from three hospitals for interviews and a total of 37 participants participated in this study. The participants were drawn from private and public hospitals. Data was collected through individual and focus group interviews and was analyzed qualitatively. Research Findings: Four major themes emerged from data. These included the journey to nursing, experiences of males in the nursing profession, retention of male nurses and strategies to recruit and retain males in nursing. Findings from the groups and categories of males in nursing in different hospitals showed similarities which reflected that the barriers faced by men in the nursing profession were still pervasive, consistent and had undergone few changes over time. Recommendations: Recommendations were categorised into community, general education, nursing education, nursing practice and nursing research. / Thesis (M.N.)-University of KwaZulu-Natal, Durban, 2011.

It is generally assumed that when natural habitat is converted to human-dominated cover such area is “lost” to its native species. Extinctions will ensue. The literature generally assumes that species are extirpated as natural area is reduced, following the well-known species-area relationship (SAR). However, SARs have consistently over-estimated species losses resulting from conversion of natural habitat to human-dominated land covers. We hypothesize that the overestimation occurs because these area-based models assume that converted habitat is “lost”, eliminating all species. However, in the real world, conversion of natural land cover to human-dominated cover frequently produces new land covers, different from the original habitat, but not necessarily completely inhospitable to biodiversity. We evaluated the responses of total avian richness, forest bird richness and open habitat bird richness to remaining natural area within 991 quadrats, each 100 km2, across southern Ontario. Total bird species richness does not follow SAR predictions; rather, the number of bird species peaks at roughly 50% natural land cover. The richness of forest birds does follow the usual SAR power-law as a function of forested area. In contrast, richness of birds that prefer open-habitat does not increase monotonically with either natural- or human-dominated land cover. However, we can partition human-dominated land cover into an “available human-dominated” component and “lost” habitat. Richness of open-habitat species relates to the amount of available human-dominated cover. Distinguishing three habitat types (natural, available human-dominated, and lost) permits accurate predictions of species losses in response to natural habitat conversion.

Over the past three decades, there has been a global paradigm shift in biodiversity conservation approaches from exclusive protected areas (PAs) towards people-centred conservation. This has encouraged the development of community-based conservation across the world, promoting reconciliation between livelihood improvement and biodiversity conservation. However, there is a growing body of literature that demonstrates mixed outcomes of community-based conservation approaches in contributing to improved conservation and local livelihoods, especially to the communities neighbouring PAs in Africa. This dissertation examines the experience of implementing one community wildlife management area (WMA) in Tanzania, with a particular focus on the effectiveness of Ikona WMA in contributing to improved conservation and local livelihoods in Western Serengeti. Specifically, the study investigates livelihood benefits and conservation impacts attributed to Ikona WMA in the study area. It also explores the success and challenges of implementing Ikona WMA and suggests areas for improvement. Qualitative and quantitative data were gathered through field-based research in Nyichoka and Robanda villages, which participate in Ikona WMA, and Rwamchanga village, which does not. Research methods employed in this study include interviews, focus group discussions, and household surveys. With regard to livelihood benefits attributed to Ikona WMA, results show benefits to the communities participating in WMA at the community level, especially improvement of social infrastructure, while few or no benefits were realized at the household level. In addition, findings show variation in perceptions between and among the communities participating in Ikona WMA and the community not participating, and among conservation experts about community access to natural resources and benefits experienced at the household level in the study area. Findings show that the communities participating in the WMA had more positive perceptions of Ikona WMA, and perceived more conservation impact than did the community not participating in the WMA. Both community members and WMA administrators perceived a decline of illegal activities, improvement of habitat, increase of wild animals, and increase of wildlife protection as the major conservation impacts attributable to Ikona WMA. Ikona WMA demonstrates some success in contributing to improved conservation and local livelihoods at the community level. However, the study reveals a number of challenges hindering effective implementation of Ikona WMA, including insufficient power over crucial decision making and ownership of wildlife resources, insufficient involvement of community members, unequal distribution of benefits at the village level, and insufficient transparency, accountability, and monitoring of village development projects. In addition, respondents identified low levels of education among community members and WMA staff members, weak collaboration with other conservation actors, and increases in both livestock and human populations as challenges to the WMA in the study area. The study suggests that broad level participation of community members in decision making about wildlife conservation, empowerment of the local community, particularly with regard to financial resources, skills training, and true devolution of power over wildlife to the community, as well as fostering equity in benefit sharing at the village level, could help to cultivate community interest in wildlife conservation. / Graduate / 0768 / 0478 / 0368

The market becomes inefficient when externalities cause market failure. However, an externality does not entrain inefficiency if a market other than the one that generates it accounts for it in some way. Airports are a well-known source of the negative externality noise; and housing market are commonly thought to be affected by airport noise. A hedonic model was applied to airport noise and the housing market, together. It was found that the housing market of the West Island of Montreal did account implicitly for the noise annoyance from Dorval Airport, hence that the noise was a pecuniary externality. Moreover, each additional unit of noise annoyance (NEFdB) was found to cause an average depreciation in housing price (NDSI) of 0.76%. Finally, the linguistic predominance (French- or English-speaking) of a neighhourhood's residents may be an appropriate Canadian analogue for the racial variables that have been specified in some hedonic property models in the U.S.

In Turkey, in most of the reinforced concrete buildings, hallow masonry infill walls are used as a non-structural element, during design stage, their contribution to overall building behavior is not well known. Observations made after the earthquakes revealed that these non-structural elements had beneficial effects on the lateral capacity of the building. In this study, the contribution of the hallow masonry infill walls to the lateral behavior of reinforced concrete buildings was investigated. For this purpose, two different buildings were chosen as case studies. Three and six story symmetric buildings are modeled as bare and infilled frames. The parameters that were investigated are column area, infill wall area, distribution of masonry infill walls throughout the story. To determine the effect of each parameter, global drift ratios are computed and are compared for each case.

Thesis (Ph. D.)--University of Toronto, 2006. / Source: Dissertation Abstracts International, Volume: 67-07, Section: A, page: 2369. Includes bibliographical references (leaves 115-120).

Thesis (Ph.D.)--University of Melbourne, Dept. of Criminology, 2005. / Also presented as the author's thesis (Ph.D.)--University of Melbourne, Dept. of Criminology, 2005. Includes bibliographical references and index. Also available in a print form.