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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.
361

Maternal Characteristics and the Risk of Cleft Lip and Palate in the United States

Thomas, Letha 01 January 2018 (has links)
Cleft lip with or without cleft palate (CLP) is an ongoing public health issue across the globe, and in the United States. The estimated number of babies born each year in the United States with cleft palate (CP) is about 2,650, while CLP affects approximately 4,440 babies. The purpose of this quantitative cross-sectional study was to determine if there is a relationship between CLP and maternal characteristics such as reproductive history (advanced maternal age, maternal obesity, prenatal visits, month prenatal care began, number of pregnancies, gestational age at birth, assisted reproductive technology used, gestational diabetes, and hypertension), socioeconomic status of the mother (marital status, education, mother's race, payment source for delivery, and place where birth occurred), and admission to the Neonatal Intensive Care Unit (NICU) in U.S. hospitals from January 2016 to December 2016. The epidemiological triad theory served as the study's framework. A secondary dataset from the National Vital Statistics System was used for this study. Logistic regression was used to test the hypothesized associations. Results indicated that many maternal characteristics such as mother's age (p = .000), maternal obesity (p = .020), number of prenatal visits (p = .001), total birth order (p = .001), gestational age at birth (p = .000), gestational diabetes (p = .002), and gestational hypertension (p = .032), mother's education (p = .000), marital status (p = .018), race (p = .000), and admission to NICU (p = .000) were significantly associated with CLP. Results of this study may help health care professionals identify the determinants of the risk of CLP so as to design and implement effective CLP preventive measures among United States populations that are disproportionately affected by this condition.
362

The Ontario Crohn’s and Colitis Cohort: Incidence and Outcomes of Childhood-onset Inflammatory Bowel Disease in Ontario, Canada

Benchimol, Eric Ian 15 September 2011 (has links)
Inflammatory bowel disease (IBD), characterized by chronic gastrointestinal inflammation, represents a significant childhood chronic disease. In this thesis, a case ascertainment definition of paediatric-onset IBD was validated using administrative data and developed the Ontario Crohn’s and Colitis Cohort (OCCC). The epidemiology of paediatric IBD in Ontario was described, demonstrating that Ontario has one of the highest worldwide incidence rates. Statistically significant increases in incidence were noted in 0-4 year olds (5.0%/year, p=0.03) and 5-9 year olds (7.6%/year, p<0.0001), but not in other age groups. Lower income children were more likely to be hospitalized at least once (hazard ratio (HR) 1.17, 95% confidence intervals (CI) 1.05-1.30) or visit the ED (HR 1.21, 95% CI 1.09-1.35) and had more IBD-related physician visits (odds ratio (OR) 3.73, 95% CI 1.05-13.27). Lower income children with Crohn's disease (CD) (not ulcerative colitis [UC]) were more likely to undergo intra-abdominal surgery within 3 years of diagnosis (OR 1.22, 95% CI 1.01-1.49), especially if diagnosed after 2000 (OR 1.79, 95% CI 1.27-2.53). Finally, changes in health services utilization and surgical rates were described, as were changes in specialist care provision and immunomodulator use in children with IBD between 1994-2007. The changes to care included increased outpatient care provided by paediatric gastroenterologists, and increased immunomodulator use. Children diagnosed with CD, but not UC, in recent years had lower surgical rates. In CD patients, intra-abdominal surgical rates within three years of diagnosis decreased from 18.8% in children diagnosed in 1994-1997 to 13.6% in those diagnosed in 2001-2004 (P = 0.035). When stratified by age at diagnosis, this decrease was significant in children diagnosed ≥10 years old (OR 0.67, 95% CI 0.48-0.93). The OCCC will continue to be used to investigate the epidemiology and burden of paediatric IBD and to improve the care received by children with IBD in Ontario.
363

Who joins the Canadian Forces? : developing a framework for analysis using Bourdieu, Habermas and Giddens

Mowat, Victoria Rose 15 April 2011
This thesis presents the results of an exploratory study aimed at developing an understanding of Canadian Forces demographics and linking those demographics to current bodies of sociological theory. The background and literature review provide a starting point for sociological analysis; the study begins with a detailed review of existing literature in Canadian and United States military sociology, utilizing an exploratory approach that incorporates key elements from Bourdieus concepts of field and habitus, Habermass lifeworld and structure, and Giddenss notion of structuration. Once the key sociological theories are isolated, research methods and methodologies are developed. Data are collected from the 2006 Canada Census and the demographics of Canadian Forces members are explored through a logistic regression model. Data are interpreted within a sociological framework based on an integration of select theories from Bourdieu, Habermas and Giddens. This research identifies weak relationships between demographic characteristics and CF membership, along with socioeconomic factors and Canadian Forces membership. The completed research provides a starting point for future analyses in Canadian military sociology. Given that demographic and socioeconomic factors demonstrate weak correlation with Canadian Forces membership, future studies can focus on the motivations of Canadian Forces members knowing that background characteristics do not predetermine service. Although the Canadian Forces is primarily composed of Caucasian males, this accounts for only a small portion of variance in the Canadian Forces membership variable.
364

The Ontario Crohn’s and Colitis Cohort: Incidence and Outcomes of Childhood-onset Inflammatory Bowel Disease in Ontario, Canada

Benchimol, Eric Ian 15 September 2011 (has links)
Inflammatory bowel disease (IBD), characterized by chronic gastrointestinal inflammation, represents a significant childhood chronic disease. In this thesis, a case ascertainment definition of paediatric-onset IBD was validated using administrative data and developed the Ontario Crohn’s and Colitis Cohort (OCCC). The epidemiology of paediatric IBD in Ontario was described, demonstrating that Ontario has one of the highest worldwide incidence rates. Statistically significant increases in incidence were noted in 0-4 year olds (5.0%/year, p=0.03) and 5-9 year olds (7.6%/year, p<0.0001), but not in other age groups. Lower income children were more likely to be hospitalized at least once (hazard ratio (HR) 1.17, 95% confidence intervals (CI) 1.05-1.30) or visit the ED (HR 1.21, 95% CI 1.09-1.35) and had more IBD-related physician visits (odds ratio (OR) 3.73, 95% CI 1.05-13.27). Lower income children with Crohn's disease (CD) (not ulcerative colitis [UC]) were more likely to undergo intra-abdominal surgery within 3 years of diagnosis (OR 1.22, 95% CI 1.01-1.49), especially if diagnosed after 2000 (OR 1.79, 95% CI 1.27-2.53). Finally, changes in health services utilization and surgical rates were described, as were changes in specialist care provision and immunomodulator use in children with IBD between 1994-2007. The changes to care included increased outpatient care provided by paediatric gastroenterologists, and increased immunomodulator use. Children diagnosed with CD, but not UC, in recent years had lower surgical rates. In CD patients, intra-abdominal surgical rates within three years of diagnosis decreased from 18.8% in children diagnosed in 1994-1997 to 13.6% in those diagnosed in 2001-2004 (P = 0.035). When stratified by age at diagnosis, this decrease was significant in children diagnosed ≥10 years old (OR 0.67, 95% CI 0.48-0.93). The OCCC will continue to be used to investigate the epidemiology and burden of paediatric IBD and to improve the care received by children with IBD in Ontario.
365

理工科系大學生性別、家庭社經地位對成就抱負與預期薪資之路徑分析 / A Path Analysis of Gender and Family Socioeconomic Status in Achievement Aspiration and Anticipated Salary: The Case of College Students in Science and Engineering

康逸筠 Unknown Date (has links)
本研究旨在以理工科系大學生為樣本,探討並建構家庭社經地位、成就抱負與預期薪資之理論模型。研究以胡悅倫(2008)建構之資料庫為樣本,抽取1,084名理工科系大學生為研究對象,以變異數分析、卡方考驗及結構方程模式建構其路徑關係模式。研究結果顯示: 一、家庭社經地位對個體的成就抱負與預期薪資有正向的影響。父母職業聲望和教育程度較高者有較高的成就抱負和預期薪資。 二、家庭社經地位會透過成就抱負為中介,間接影響個體的預期薪資。 三、男女性在成就抱負上無顯著差異,但在預期薪資中男性的預期薪資會高於女性的預期薪資。 四、男性會進入男性化職業,女性會進入女性化職業。 五、預期進入男性化職業工作者的預期薪資高於進入女性化職業的工作者,而這樣的差距是跨性別存在。 最後,研究者根據研究結果提出建議,供實務工作者與後續研究者參考。 / The purpose of this study is to investigate and build a model on how family socioeconomic status affects achievement aspiration and anticipated salary. Participants are 1,084 Science and Engineering students from the database compiled by Yueh-Luen Hu (2008). Data analysis includes one-way ANOVA, t-test, chi-square test, and structural equation modeling. Results of the study are as follows: 1. Family socioeconomic status had significant positive effects on achievement aspiration and anticipated salary. Participants who are of higher socioeconomic status also had higher achievement aspiration and anticipated salary. 2. Achievement aspiration acted as a mediator between family socioeconomic status and anticipated salary. Achievement aspiration had significant indirect effects on anticipated salary. 3. The gender differences in achievement aspiration are non-significant. However, Men’s pay expectations are higher than of the women’s. 4. Males prefer to enter male-dominated jobs, while females prefer to enter female-dominated jobs. 5. Those who hold female-dominated jobs expect to gain less pay than those pursuing male-dominated jobs. The gap exists for both men and women. Results of the study shall serve as a point of reference for future researches.
366

Who joins the Canadian Forces? : developing a framework for analysis using Bourdieu, Habermas and Giddens

Mowat, Victoria Rose 15 April 2011 (has links)
This thesis presents the results of an exploratory study aimed at developing an understanding of Canadian Forces demographics and linking those demographics to current bodies of sociological theory. The background and literature review provide a starting point for sociological analysis; the study begins with a detailed review of existing literature in Canadian and United States military sociology, utilizing an exploratory approach that incorporates key elements from Bourdieus concepts of field and habitus, Habermass lifeworld and structure, and Giddenss notion of structuration. Once the key sociological theories are isolated, research methods and methodologies are developed. Data are collected from the 2006 Canada Census and the demographics of Canadian Forces members are explored through a logistic regression model. Data are interpreted within a sociological framework based on an integration of select theories from Bourdieu, Habermas and Giddens. This research identifies weak relationships between demographic characteristics and CF membership, along with socioeconomic factors and Canadian Forces membership. The completed research provides a starting point for future analyses in Canadian military sociology. Given that demographic and socioeconomic factors demonstrate weak correlation with Canadian Forces membership, future studies can focus on the motivations of Canadian Forces members knowing that background characteristics do not predetermine service. Although the Canadian Forces is primarily composed of Caucasian males, this accounts for only a small portion of variance in the Canadian Forces membership variable.
367

Edmonton Indoor Air Quality Study (EIAQS): Determinants of Residential Benzene

Chui, Phyllis H. Y. Unknown Date
No description available.
368

Plant diversity patterns of a settlement in the North-West Province, South Africa / Elandrie Davoren

Davoren, Elandrie January 2009 (has links)
In recent years the composition of urban vegetation has become far more complex than that of the surrounding natural vegetation. This is mainly due to the influence that humans have on the creation of new plant communities and the management of urban green spaces. Green spaces are fundamental to the restoration and maintenance of biodiversity in areas that have been severely impacted by urban development. Green spaces provide various ecosystem services and benefits for the health and well-being of urban residents, and can help to reduce the effects of global climate change. The most understudied green space in the entire urban green infrastructure is homegardens. Homegardens contribute greatly to the species composition of urban and rural settlements and are important in situ conservation sites that help to protect rare and endemic species. They are essential agricultural systems, especially in rural settlements, that provide both sources of additional income generation and food supply. In developing countries such as South Africa, very few studies have been done on homegardens and the benefits they provide to homeowners and to urban ecosystems in general. However, since South Africa become committed to the United Nations Millennium Development Goals in 2000, more research has been done on the potential of homegardens for poverty alleviation. The aim of this study was to determine the patterns of plant diversity in a rural settlement and to determine to what extent the socioeconomic status of the inhabitants influences the plant species composition of the settlement. The settlement of Ganyesa, situated in the Bophirima district in the North-West Province, was chosen for the study. Using GIS techniques, a grid was placed over the settlement and plant surveys were done every 500 m. Different land-use types were identified during the completion of the survey, namely natural areas, fragmented natural areas, fallow fields, road verges, wetlands, home gardens and institutional gardens. The national South African census data from 2001 proved to be too unreliable to accurately determine the SES of the residents in Ganyesa. Consequently, a social survey was completed by means of a questionnaire to determine the socioeconomic status of the owners of the homegardens under study. Clear differences could be observed between the land-use types and the indigenous and alien species composition, which were indicated in kriging maps. In comparison with the natural areas, homegardens contained more alien species than the surrounding natural areas. The vegetation composition for all the homegardens were correlated with the residents socioeconomic status along a socioeconomic gradient, ranging from low, to medium to high. ANCOVA, multiple regressions and basic statistical analyses were performed using all the vegetation and socioeconomic data. Meaningful correlations occur between the socioeconomic status of the homeowners and the plant diversity of their gardens. / Thesis (M. Environmental Science)--North-West University, Potchefstroom Campus, 2010.
369

Plant diversity patterns of a settlement in the North-West Province, South Africa / Elandrie Davoren

Davoren, Elandrie January 2009 (has links)
In recent years the composition of urban vegetation has become far more complex than that of the surrounding natural vegetation. This is mainly due to the influence that humans have on the creation of new plant communities and the management of urban green spaces. Green spaces are fundamental to the restoration and maintenance of biodiversity in areas that have been severely impacted by urban development. Green spaces provide various ecosystem services and benefits for the health and well-being of urban residents, and can help to reduce the effects of global climate change. The most understudied green space in the entire urban green infrastructure is homegardens. Homegardens contribute greatly to the species composition of urban and rural settlements and are important in situ conservation sites that help to protect rare and endemic species. They are essential agricultural systems, especially in rural settlements, that provide both sources of additional income generation and food supply. In developing countries such as South Africa, very few studies have been done on homegardens and the benefits they provide to homeowners and to urban ecosystems in general. However, since South Africa become committed to the United Nations Millennium Development Goals in 2000, more research has been done on the potential of homegardens for poverty alleviation. The aim of this study was to determine the patterns of plant diversity in a rural settlement and to determine to what extent the socioeconomic status of the inhabitants influences the plant species composition of the settlement. The settlement of Ganyesa, situated in the Bophirima district in the North-West Province, was chosen for the study. Using GIS techniques, a grid was placed over the settlement and plant surveys were done every 500 m. Different land-use types were identified during the completion of the survey, namely natural areas, fragmented natural areas, fallow fields, road verges, wetlands, home gardens and institutional gardens. The national South African census data from 2001 proved to be too unreliable to accurately determine the SES of the residents in Ganyesa. Consequently, a social survey was completed by means of a questionnaire to determine the socioeconomic status of the owners of the homegardens under study. Clear differences could be observed between the land-use types and the indigenous and alien species composition, which were indicated in kriging maps. In comparison with the natural areas, homegardens contained more alien species than the surrounding natural areas. The vegetation composition for all the homegardens were correlated with the residents socioeconomic status along a socioeconomic gradient, ranging from low, to medium to high. ANCOVA, multiple regressions and basic statistical analyses were performed using all the vegetation and socioeconomic data. Meaningful correlations occur between the socioeconomic status of the homeowners and the plant diversity of their gardens. / Thesis (M. Environmental Science)--North-West University, Potchefstroom Campus, 2010.
370

A Structural Equation Modeling Study: Factors Related To Mathematics And Geometry Achievement Across Grade Levels

Gokce, Semirhan 01 September 2005 (has links) (PDF)
The factors related to mathematics and geometry achievement were modeled in this study. It was based on the data obtained from the Student Assessment Program carried out by Ministry of National Education. Mathematics achievement tests and student questionnaires of each grade were analyzed by using principal component analysis to obtain different dimensions that are expected to be related with student achievement. Before the principal component analysis, a content based evaluation of the content of the mathematics achievement tests was actualized and the items were grouped as mathematics and geometry. Regarding the student questionnaire socio-economic status, perception of success and interest toward mathematics and science, student-centered activities and teacher-centered activities in the classroom were identified as factors through the principal component analysis. Thereafter, three models were designed and tested by structural equation modeling technique (SEM) using LISREL 8.54. Path analysis with latent variables was used for testing the models. The following results were obtained in the study. In all of the models, socioeconomic status had a positive impact on the mathematics and geometry achievement of the students for all the grade levels examined. Teacher centered activities were found to be positively related with the students&rsquo / success of mathematics and geometry. On the other hand, student centered activities intended to have a negative relation with mathematics and geometry achievement. As the other variables were considered, an increase on the mathematics and geometry scores of the students&rsquo / was observed in all grade levels with the increase in the perception of success and interest toward mathematics and science.

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