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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
131

Collection of endmembers and their separability for spectral unmixing in rangeland applications

Rolfson, David, University of Lethbridge. Faculty of Arts and Science January 2010 (has links)
Rangelands are an important resource to Alberta. Due to their size, mapping rangeland features is difficult. However, the use of aerial and satellite data for mapping has increased the area that can be studied at one time. The recent success in applying hyperspectral data to vegetation mapping has shown promise in rangeland classification. However, classification mapping of hyperspectral data requires existing data for input into classification algorithms. The research reported in this thesis focused on acquiring a seasonal inventory of in-situ reflectance spectra of rangeland plant species (endmembers) and comparing them to evaluate their separability as an indicator of their suitability for hyperspectral image classification analysis. The goals of this research also included determining the separability of species endmembers at different times of the growing season. In 2008, reflectance spectra were collected for three shrub species (Artemisia cana, Symphoricarpos occidentalis, and Rosa acicularis), five rangeland grass species native to southern Alberta (Koeleria gracilis, Stipa comata, Bouteloua gracilis, Agropyron smithii, Festuca idahoensis) and one invasive grass species (Agropyron cristatum). A spectral library, built using the SPECCHIO spectral database software, was populated using these spectroradiometric measurements with a focus on vegetation spectra. Average endmembers of plant spectra acquired during the peak of sample greenness were compared using three separability measures – normalized Euclidean distance (NED), correlation separability measure (CSM) and Modified Spectral Angle Mapper (MSAM) – to establish the degree to which the species were separable. Results were normalized to values between 0 and 1 and values above the established thresholds indicate that the species were not separable . The endmembers for Agropyron cristatum, Agropyron smithii, and Rosa acicularis were not separable using CSM (threshold = 0.992) or MSAM (threshold = 0.970). NED (threshold = 0.950) was best able to separate species endmembers. Using reflectance data collected throughout the summer and fall, species endmembers obtained within two-week periods were analyzed using NED to plot their separability. As expected, separability of sample species changed as they progressed through their individual phenological patterns. Spectra collected during different solar zenith angles were compared to see if they affected the separability measures. Sample species endmembers were generally separable using NED during the periods in which they were measured and compared. However, Koeleria gracilis and Festuca idahoensis endmembers were inseparable from June to mid-August when measurements were taken at solar zenith angles between 25° – 30° and 45° – 60°. However, between 30° and 45°, Bouteloua gracilis and Festuca idahoensis endmembers, normally separable during other solar zenith angles, became spectrally similar during the same sampling period. Findings suggest that the choice of separability measures is an important factor when analyzing hyperspectral data. The differences observed in the separability results over time also suggest that the consideration of phenological patterns in planning data acquisition for rangeland classification mapping has a high level of importance. / xii, 93 leaves : ill. (some col.) ; 29 cm
132

Journeys to the food bank : exploring the experience of food insecurity among postsecondary students

Nugent, Mary A January 2011 (has links)
Food insecurity is a global issue giving rise to health inequities affecting populations at all life stages. Postsecondary student food insecurity exists, yet is an understudied phenomenon. To provide insight into the perspectives and experiences of food insecurity in the postsecondary population, university students (n=15) who accessed a campus food bank were interviewed utilizing person-centered interviewing. The social determinants of health (SDH) and structural violence theory provided conceptual guidance for the qualitative study. Students were found to lead complex lives, shouldering many responsibilities. They valued their health; however, they lacked the necessary supports to maintain adequate nutritional intake. They employed multiple strategies to mitigate their food insecurity issues, while concurrently making sacrifices and experiencing suffering. Three economic pathways leading students to food bank use included shortfall, cumulative and catastrophic pathways. This research offers increased understanding of food insecurity in this vulnerable population, exposing inequities which must be addressed. Keywords: / xi, 304 leaves ; 29 cm
133

Methodologies for mapping the spatial extent and fragmentation of grassland using optical remote sensing

Roy, Gairik January 2012 (has links)
Grassland is an important part of the ecosystem in the Canadian prairies and its loss and fragmentation affect biodiversity, as well as water and carbon fluxes at local and regional levels. Over the years, native grasslands have been lost to agricultural activities, urban development and oil and gas exploration. This research reports on new methodologies developed for mapping the spatial extent of native grasslands to an unprecedented level of detail and assessing how the grasslands are fragmented. The test site is in the Newell County region of Alberta (NCRA). 72 Landsat and 34 SPOT images from 1985 to 2008 were considered for the analysis. With an airport runway used as a pseudo-invariant feature (PIF), relative radiometric correction was applied to 17 Landsat and 8 SPOT images that included the same airport runway. All the images were classified using the Support Vector Machine (SVM) classification algorithm into grassland, crop, water and road infrastructure classes. The classification results showed an average of 98.2 % overall accuracy for Landsat images and SPOT images. Spatial extents and their temporal change were estimated for all the land cover classes after classifying the images. Fragmentation statistics were obtained using FRAGSTATS 3.3 software that calculated land cover pattern metrics (patch, class and landscape). Based on the available satellite image data, it is found that in Newell County there is almost no significant change found in the grassland and road infrastructure land cover in over two decades. Also, the fragmentation results suggest that fragmentation of grassland was not due to the result of road infrastructure. / x, 105 leaves : ill., ; 29 cm
134

Social Credit and the Jews : anti-Semitism in the Alberta Social Credit movement and the response of the Canadian Jewish Congress, 1935-1949

Stingel, Janine. January 1997 (has links)
The purpose of this thesis is to examine the anti-Semitic propaganda of Social Credit movement in the 1930s and 1940s and its impact on organized Canadian Jewry. During World War Two, the Alberta Social Credit government and its provincial land national parties engaged in the dissemination of anti-Semitic propaganda, which greatly concerned the Canadian Jewish Congress, the national representative organization for Canadian Jewry. The Canadian Jewish Congress responded by attempting to confront and end this propaganda; however, it lacked a public relations philosophy effective and assertive enough to do so. Eventually the Social Credit movement realized the political liabilities of engaging in anti-Semitic propaganda; yet despite Congress's years of efforts, it could take little credit for Social Credit's purge of anti-Semitism. An examination of the relationship between the Canadian Jewish Congress and the Social Credit movement adds a new perspective on the history of both organizations, and reveals much about ethnic organization in Canada and the nation's political culture of intolerance. / The sources for this thesis come from the Canadian Jewish Congress National Archives in Montreal, the National Archives of Canada in Ottawa, the Provincial Archives of Manitoba in Winnipeg, the Glenbow Archives-Institute in Calgary, and the Provincial Archives of Alberta in Edmonton. The Canadian Social Crediter, Vers Demain, and other Canadian newspapers were used extensively. The sources on the Social Credit movement held at the Canadian Jewish Congress National Archives have not been used before, which makes this thesis a significant departure from previous works.
135

The ideological relationship between the United Farmers of Alberta and the Cooperative Commonwealth Federation.

Smith, M. Marcia January 1967 (has links)
No description available.
136

A sensemaking exploration of work-eldercare crisis and the co-construction of informal work-eldercare policies

Frank, Kristal L January 2013 (has links)
This study will contribute to existing work–family research by bringing a rich emic understanding of caregivers’ experience with work-eldercare crisis. I adopted Weick’s theory of organizational sensemaking (1995) as method and methodology for this research. I collected data via open-ended, semi-structured interviews with employees who balance full-time employment with caregiving for an elderly person; then I subjected the transcribed texts to a detailed thematic analysis. This analysis helped me identify three main themes that reflect the processes participants use to ‘make sense’ of their experiences. The results of this study suggest that caregivers enact the work environment to attempt creating balance—and to enlist support and assistance—by strategically engaging in interpersonal interactions with others at work about their eldercare activities. They combine past experience with the knowledge obtained from these interactions to develop heuristic scripts, and then use them to enable understanding and guide future behaviour and actions. This study demonstrates that sensemaking is a useful analytical framework through which to examine employees’ experience of the work-family interface. The findings of this research offer insight into the processes involved in the social construction of informal organizational policies; the implications provide a foundation to develop better models of organizational response towards employees’ work-eldercare needs / xi, 171 leaves ; 29 cm
137

Instruction in assessment-for-learning practices in Alberta teacher preparation programs

Sillito, G. Nathan, University of Lethbridge. Faculty of Education January 2013 (has links)
This study is an examination of what teacher preparation institutions in the Canadian province of Alberta are teaching student teachers about ‘assessment-for-learning’ practices. A large body of research exists to show that assessment-for-learning practices are among the best tools educators have for improving student learning; therefore, it is important that assessment-for-learning practices be taught to prospective teachers. As a school administrator, I had encountered many first-year teachers who seemed to be lacking knowledge and skills in assessment-for-learning practices and I sought to determine whether or not the deficiencies could be traced to inadequate preparation during their undergraduate training. Interviews were conducted with instructors at seven Alberta education faculties on whether and how assessment-for-learning practices were integrated into their teacher education programs. There is some variance in the way courses are organized to teach assessment-for-learning practices to student teachers; some schools having a designated course on assessment, others embedding assessment into other teacher preparation courses. Overall, the findings in this study suggest that Alberta education faculties are providing future teachers with training in assessment-for-learning practices. Further research into other areas of teacher preparation and/or induction would be necessary to determine the reasons for deficiencies in new teacher knowledge of assessment-for-learning practices. This study also includes some recommendations for improving instruction in assessment for learning at Alberta teacher preparation institutions, as well as some suggestions for further study. / vii, 73 leaves ; 29 cm
138

The co-ordination of light rapid transit and land-use : an examination of the institutional framework in Edmonton

Hammermeister, James Paul January 1987 (has links)
Land use and transportation are dynamic processes continually reacting to the pressures of urban development and societal change. Although the theoretical literature supports the notion that land use and transportation should be planned and managed in a co-ordinated fashion, the empirical evidence suggests that land use and transportation decisions are still made largely independent of each other. The thesis maintains that an emphasis on the substantive approach in the planning process has led to a misunderstanding of the manner in which the institutional framework can influence the co-ordinated development of land use and transportation. Several institutional factors are involved including; the organizational framework, the process of integration within the framework, and the strategies developed to implement societal goals and objectives. Specific concerns include; fragmentation of authority, lack of authority, a reactive planning process, and the lack of formal mechanisms for implementation. An adaptive, process-oriented model of institutional integration is proposed that blends two elements of an effective planning process: the co-ordinated development of land use and transportation and the integration of organizational components within the institutional framework. The thesis suggests that one cannot successfully implement strategic change without making compensating and reinforcing changes to the process and structure. The degree of risk and uncertainty within the environment is the qualifying factor that maintains a proper 'fit' within the planning process. The latter part of the thesis examines the institutional framework responsible for the development of the City of Edmonton's Northeast light rapid transit system. The analysis reveals that although rapid transit was seen as a means of accomplishing compact growth and development little redevelopment has occurred along the transit corridor, particularly at the level envisaged by the city planners. A number of institutional factors have contributed to the lack of development including; a dynamic and complex environment, a reactive planning process, the lack of formal integrative mechanisms, separate and, at times, independent land use and transportation planning processes, and disincentives towards redevelopment such as the redevelopment levy and zoning freeze. The application of the integrated institutional model suggests the need for a number of integrative mechanisms that were not evident within the institutional framework responsible for Edmonton's light rapid transit system. The study reveals that the institutional framework influences the effectiveness of land use planning along a rapid transit corridor and that integrative mechanisms are required within the planning process in order to effectively co-ordinate the development of land use and transportation. / Applied Science, Faculty of / Community and Regional Planning (SCARP), School of / Graduate
139

A client evaluation of the personal support and development network

Dorin, Casey Shane January 1990 (has links)
In recent years, there has been a trend in Canada towards a model of social assistance which is pro-active in getting people off social assistance and into the labour force. Despite the proliferation of supply-side focussed programs emphasizing training and employment-counselling, however, there has been little research and evaluation of workfare models in the Canadian context. The purpose of this study is to explore the primary and secondary effects, as perceived by the clients, of a three month employment-counselling program (PSDN) that serves long-term unemployed social assistance recipients in Edmonton, Alberta. The qualitative study utilizes a basic time series (A-B) design for exploratory-descriptive purposes. Four categories of participants in the PSDN program are identified: Reactive, Pro-active, Restricted and Reluctant. The findings suggest that policies and programs need to acknowledge the diversity and heterogeneity of problems being faced by the unemployed on social assistance. There are potential benefits in developing programs for the unemployed on social assistance which are flexible, positive, motivating, and supportive. Clients require different levels of interventions and services depending on their needs. / Arts, Faculty of / Social Work, School of / Graduate
140

Oldtimers, newcomers, and social class : group affiliation and social influence in Lethbridge, Alberta

Marlor, Chantelle Patricia 11 1900 (has links)
The results of an ethnohistorical study of Lethbridge, Alberta led to my questioning current presumptions in the Canadian social inequality literature that social class, income, educational attainment, gender and ethnicity are principal factors in shaping social inequality in Canada. The ethnographic evidence suggests that membership criteria associated with locally-defined, historically-evolved groups mark who has political influence (a specific form of social power), and where the ensuing social inequalities lie in Lethbridge. A theoretical framework describing how historical circumstances lead to the redefinition of which socially-defined characteristics become local status markers is presented as the underlying theoretical orientation of this thesis. The framework does not preclude the possibility that social groups other than those studied in this thesis use social class, occupation, income, education, gender and ethnicity as status characteristics or group membership criteria. The framework is my attempt to clarify the often-unclear relationship among social inequality concepts. A mail-out social survey (N=238) was used to empirically test the hypothesis that Lethbridge group membership is a better predictor than social class, income, educational attainment, gender and/or ethnicity of who has political influence in Lethbridge community decision-making. Data was analyzed using analysis of variance (ANOVA), bivariate correlation, and multiple regression. Mixed levels of support were found for the Lethbridge group hypotheses, with the "fits in" and "local trade/business people" receiving considerable support; North/South/West sider, and religious affiliation receiving some support; and Old-timers receiving no support. In contrast, the only social inequality hypothesis to receive more than minimal support was level of education. It is concluded that status characteristics are more fluid, local and historically negotiated than assumed in the social inequality literature. Suggested directions for future theoretical and empirical work include refinement of the relationships among social inequality variables and further empirical tests of the theoretical framework proposed here. / Arts, Faculty of / Anthropology, Department of / Graduate

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