Vegetation status is a key indicator of the ecosystem condition in a particular area. The study objective was about the estimation of leaf nitrogen (N) as an indicator of vegetation water stress using vegetation indices especially the red edge based ones, and how leaf N concentration is influenced by various environmental factors. Leaf nitrogen was estimated using univariate and multivariate regression techniques of stepwise multiple linear regression (SMLR) and random forest. The effects of environmental parameters on leaf nitrogen distribution were tested through univariate regression and analysis of variance (ANOVA). Vegetation indices were evaluated derived from the analytical spectral device (ASD) data, resampled to RapidEye. The multivariate models were also developed to predict leaf N. The best model was chosen based on the lowest root mean square error (RMSE) and higher coefficient of determination (R2) values. Univariate results showed that red edge based vegetation index called MERRIS Terrestrial Chlorophyll Index (MTCI) yielded higher leaf N estimation accuracy as compared to other vegetation indices. Simple ratio (SR) based on the bands red and near-infrared was found to be the best vegetation index for leaf N estimation with exclusion of red edge band for stepwise multiple linear regression (SMLR) method. Simple ratio (SR3) was the best vegetation index when red edge was included for stepwise linear regression (SMLR) method. Random forest prediction model achieved the highest leaf N estimation accuracy, the best vegetation index was Red Green Index (RGI1) based on all bands with red green index when including the red edge band. When red edge band was excluded the best vegetation index for random forest was Difference Vegetation Index (DVI1). The results for univariate and multivariate results indicated that the inclusion of the red edge band provides opportunity to accurately estimate leaf N. Analysis of variance results showed that vegetation and soil types have a significant effect on leaf N distribution with p-values<0.05. Red edge based indices provides opportunity to assess vegetation health using remote sensing techniques. / Environmental Sciences / M. Sc. (Environmental Management)

The purpose of this study was to explore and describe staff experiences in managing data and/or information when utilising the District Health Information System (DHIS) as a support mechanism for data quality improvement, including the strengths and weaknesses of current data management processes. It was also aimed to identify key barriers and to make recommendations on how data management can be strengthened. Key informants included in this study were those based at the district office (health programme managers and information officers) and at the primary health care (PHC) facilities (facility managers, clinical nurse practitioners and data capturers). An exploratory, descriptive and generic qualitative study was conducted. Consent was requested from each participant. Data were collected through semi-structured interviews. The study findings highlighted strengths, weaknesses and key barriers as experienced by the staff. Strengths, such as having data capturers and DHIS software at most if not all facilities, were highlighted. The weaknesses and key barriers highlighted were staff shortages of both clinical and health management information staff (HMIS), shortage of resources such as computers and Internet access, poor feedback, training needs and data quality issues. Most of the weaknesses and key barriers called for further and proper implementation of the District Health Management Information Systems (DHMIS) policy, the standard operating procedures (SOP), the eHealth strategy and training of the staff, due to the reported gaps between the policy and the reality and/or practice at the facility / Health Studies / M.A. (Public Health with specialisation in Medical Informatics)

The purpose of this study was to explore and describe staff experiences in managing data and/or information when utilising the District Health Information System (DHIS) as a support mechanism for data quality improvement, including the strengths and weaknesses of current data management processes. It was also aimed to identify key barriers and to make recommendations on how data management can be strengthened. Key informants included in this study were those based at the district office (health programme managers and information officers) and at the primary health care (PHC) facilities (facility managers, clinical nurse practitioners and data capturers). An exploratory, descriptive and generic qualitative study was conducted. Consent was requested from each participant. Data were collected through semi-structured interviews. The study findings highlighted strengths, weaknesses and key barriers as experienced by the staff. Strengths, such as having data capturers and DHIS software at most if not all facilities, were highlighted. The weaknesses and key barriers highlighted were staff shortages of both clinical and health management information staff (HMIS), shortage of resources such as computers and Internet access, poor feedback, training needs and data quality issues. Most of the weaknesses and key barriers called for further and proper implementation of the District Health Management Information Systems (DHMIS) policy, the standard operating procedures (SOP), the eHealth strategy and training of the staff, due to the reported gaps between the policy and the reality and/or practice at the facility / Health Studies / M. A. (Public Health with specialisation in Medical Informatics)

Text in Afrikaans / Gemotiveerde onderwysers speel 'n belangrike rol in suksesvolle onderrig en leer. Die doelwit van hierdie studie was om faktore te identifiseer wat 'n invloed uitoefen op onderwysermotivering. 'n Kwalitatiewe navorsingsontwerp van individiduele onderhoud-voering met agt doelgerig geselekteerde deelnemers is gebruik ten einde antwoorde te kry op faktore wat „n invloed uitoefen op die motivering van grondslagfase-onderwysers. Die doelwitte van hierdie studie was ook om riglyne aan onderwysers te verskaf oor hoe om hulself te motiveer en aan skoolhoofde oor hoe om hul onderwysers te motiveer. Daar is bevind dat faktore wat 'n invloed uitoefen op die motivering van onderwysers verband hou met die spesifieke skoolomgewing, die finansiële vergoeding van onderwysers, die werksverhoudings met ander onderwysers, die invloed van ouers, die verhoudings met die skoolhoof en die gedrag van leerders. As belangrikste motiveringsfaktor geld die onderwyser se eie lewensingesteldheid wat of op 'n positiewe of negatiewe lewensuitkyk gesentreer kan wees. / Motivated teachers play an important role in successful teaching and learning. The aim of this study was to identify factors that have an influence on teacher motivation. A qualitative research design was used. Individual interviews with eight purposefully selected participants were held to get answers to the factors that have an influence on the motivation of foundation phase teachers. The aim of this study was also to give guidelines to teachers on how to motivate themselves and to school principles on how to motivate teachers. The results indicate that factors influencing the motivation of teachers have to do with the specific school environment, the financial reward of teachers, the work relationship with other teachers, the influence of parents, therelationship with the school principal and the behaviour of learners. The most important motivation factor is the teacher‟s own attitude towards lifewhichcanrepresenta positive or negative life view. / Educational Leadership and Management / M. Ed. (Onderwysbestuur)

Vegetation status is a key indicator of the ecosystem condition in a particular area. The study objective was about the estimation of leaf nitrogen (N) as an indicator of vegetation water stress using vegetation indices especially the red edge based ones, and how leaf N concentration is influenced by various environmental factors. Leaf nitrogen was estimated using univariate and multivariate regression techniques of stepwise multiple linear regression (SMLR) and random forest. The effects of environmental parameters on leaf nitrogen distribution were tested through univariate regression and analysis of variance (ANOVA). Vegetation indices were evaluated derived from the analytical spectral device (ASD) data, resampled to RapidEye. The multivariate models were also developed to predict leaf N. The best model was chosen based on the lowest root mean square error (RMSE) and higher coefficient of determination (R2) values. Univariate results showed that red edge based vegetation index called MERRIS Terrestrial Chlorophyll Index (MTCI) yielded higher leaf N estimation accuracy as compared to other vegetation indices. Simple ratio (SR) based on the bands red and near-infrared was found to be the best vegetation index for leaf N estimation with exclusion of red edge band for stepwise multiple linear regression (SMLR) method. Simple ratio (SR3) was the best vegetation index when red edge was included for stepwise linear regression (SMLR) method. Random forest prediction model achieved the highest leaf N estimation accuracy, the best vegetation index was Red Green Index (RGI1) based on all bands with red green index when including the red edge band. When red edge band was excluded the best vegetation index for random forest was Difference Vegetation Index (DVI1). The results for univariate and multivariate results indicated that the inclusion of the red edge band provides opportunity to accurately estimate leaf N. Analysis of variance results showed that vegetation and soil types have a significant effect on leaf N distribution with p-values<0.05. Red edge based indices provides opportunity to assess vegetation health using remote sensing techniques. / Environmental Sciences / M. Sc. (Environmental Management)

Text in Afrikaans / Gemotiveerde onderwysers speel 'n belangrike rol in suksesvolle onderrig en leer. Die doelwit van hierdie studie was om faktore te identifiseer wat 'n invloed uitoefen op onderwysermotivering. 'n Kwalitatiewe navorsingsontwerp van individiduele onderhoud-voering met agt doelgerig geselekteerde deelnemers is gebruik ten einde antwoorde te kry op faktore wat „n invloed uitoefen op die motivering van grondslagfase-onderwysers. Die doelwitte van hierdie studie was ook om riglyne aan onderwysers te verskaf oor hoe om hulself te motiveer en aan skoolhoofde oor hoe om hul onderwysers te motiveer. Daar is bevind dat faktore wat 'n invloed uitoefen op die motivering van onderwysers verband hou met die spesifieke skoolomgewing, die finansiële vergoeding van onderwysers, die werksverhoudings met ander onderwysers, die invloed van ouers, die verhoudings met die skoolhoof en die gedrag van leerders. As belangrikste motiveringsfaktor geld die onderwyser se eie lewensingesteldheid wat of op 'n positiewe of negatiewe lewensuitkyk gesentreer kan wees. / Motivated teachers play an important role in successful teaching and learning. The aim of this study was to identify factors that have an influence on teacher motivation. A qualitative research design was used. Individual interviews with eight purposefully selected participants were held to get answers to the factors that have an influence on the motivation of foundation phase teachers. The aim of this study was also to give guidelines to teachers on how to motivate themselves and to school principles on how to motivate teachers. The results indicate that factors influencing the motivation of teachers have to do with the specific school environment, the financial reward of teachers, the work relationship with other teachers, the influence of parents, therelationship with the school principal and the behaviour of learners. The most important motivation factor is the teacher‟s own attitude towards lifewhichcanrepresenta positive or negative life view. / Educational Leadership and Management / M. Ed. (Onderwysbestuur)