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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.
11

Characterisation, toxicology and clinical effects of crocodile oil in skin products / by Telanie Venter.

Venter, Telanie January 2012 (has links)
Natural oils are regularly used in cosmetics and as treatment for numeral skin conditions (Nielsen, 2006:575). The natural products industry is a multibillion dollar industry and has grown tremendously over the past few years. Natural oils used in cosmetics contain a range of fatty acids which contribute to several valuable properties in cosmetic- and personal care products. Fatty acids are divided into saturated acids and unsaturated acids (Vermaak et al., 2011:920,922). Because of the popularity and wide diversity of skin care products, it is necessary to create products that will distinguish themselves from the rest of the commercial products. To include natural oils in skin care products is a new way to prevent skin ageing, as well as other dermatological conditions. In this study, a natural oil, namely crocodile oil was used. Crocodile oil is obtained from the fat of the Nile crocodile (Crocodylus niloticus). Crocodile oil has the same composition as human skin oil. It only differs with regard to the percentages of the ingredients present. Crocodile oil contains saturated and unsaturated fatty acids. Because of the similar composition as human skin oil, crocodile oil will rarely be allergenic when applied to human skin and therefore will be a very accepted and harmless product to use (Croc city, 2012). There are many claims of positive results when crocodile oil containing products have been used. It includes fading of freckles, treatment of acne and pimple marks, dark lines, wrinkles and laugh lines. It also includes vanishing of dark shadows, sun spots and other discolorations. It helps prevent discolorations from forming and makes the skin softer, brighter and more attractive. It also controls rashness and dryness (Croc city, 2012). Because of crocodile oil’s anti-ageing, anti-fungal and anti-bacterial effects claimed by crocodile oil suppliers, and due to the fact that little scientific data is available on crocodile oil, it was decided to investigate the claims. In this study, the aims and objectives were to use natural oil, namely crocodile oil, and investigate the fatty acid profile, anti-microbial and anti-fungal activity, anti-oxidant activity, toxicity studies, stability determination of crocodile oil lotion and clinical efficacy testing of the anti-ageing effects. To determine the fatty acid profile of crocodile oil, fatty acid methyl ester (FAME) analysis with gas chromatography were used. Identification of FAME peaks in the samples was made by comparing the relative retention times of FAME peaks from samples to those of reference standards. The composition of fatty acids in crocodile oil compared well to fatty acids found in human skin oil. Anti-microbial and anti-fungal tests were done by Envirocare Laboratories, North-West University, Potchefstroom. Staphylococcus aureus, Esterichia coli, Pseudomanas aeruginosa, Candida albicans, Brasiliensis, Propionibacterium acnes and Trichophyton rubrum cultures were used to determine the anti-microbial and anti-fungal activity of crocodile oil. Unfortunately no activity was observed. The anti-oxidant properties of crocodile oil and crocodile oil lotion were determined by using the most commonly used method for measuring Malondialdehyde (MDA) in biological samples, namely the thiobarbituric acid (TBA) test. This method is based on spectrophotometric quantification of the pink complex formed after reaction of MDA with two molecules of TBA. No anti-oxidant activity was observed in the oil or the lotion. Toxicity studies were performed by Dr. D. Goosen (BVSc Hons. Pret.) from Tswane University of Technology (Pretoria, South Africa). The studies showed that the lotion had no toxicity in the skin sensitisation, acute dermal toxicity and acute dermal irritation studies. To determine the stability of the crocodile oil lotion, the formulated products were store at 25 °C / 60% RH (relative humidity), 30 °C / 60% RH and 40 °C / 75% RH for 6 months in the original packaging as well as a glass container. The stability tests included pH, viscosity, visual appearance assessment, zeta-potential, droplet size and mass loss. The crocodile cream lotion was stable over the 6 months period in both containers. Clinical efficacy testing was performed at the CEL (Clinical Efficacy Laboratory) of the North-West University, Potchefstroom, South Africa. A short-term study over a period of 3 h was performed to investigate the hydrating effects of crocodile oil lotion. A long-term study over a period of 12 weeks was performed to examine the anti-ageing effects of crocodile oil lotion. An erythema study was also conducted to test the anti-erythema properties of crocodile oil lotion. Although the crocodile oil lotion as well as the placebo lotion showed an increase in skin hydration, there was no significant difference between the two treatments. Crocodile oil lotion also showed no anti-erythema properties. / Thesis (PhD (Pharmaceutics))--North-West University, Potchefstroom Campus, 2013.
12

Characterisation, toxicology and clinical effects of crocodile oil in skin products / by Telanie Venter.

Venter, Telanie January 2012 (has links)
Natural oils are regularly used in cosmetics and as treatment for numeral skin conditions (Nielsen, 2006:575). The natural products industry is a multibillion dollar industry and has grown tremendously over the past few years. Natural oils used in cosmetics contain a range of fatty acids which contribute to several valuable properties in cosmetic- and personal care products. Fatty acids are divided into saturated acids and unsaturated acids (Vermaak et al., 2011:920,922). Because of the popularity and wide diversity of skin care products, it is necessary to create products that will distinguish themselves from the rest of the commercial products. To include natural oils in skin care products is a new way to prevent skin ageing, as well as other dermatological conditions. In this study, a natural oil, namely crocodile oil was used. Crocodile oil is obtained from the fat of the Nile crocodile (Crocodylus niloticus). Crocodile oil has the same composition as human skin oil. It only differs with regard to the percentages of the ingredients present. Crocodile oil contains saturated and unsaturated fatty acids. Because of the similar composition as human skin oil, crocodile oil will rarely be allergenic when applied to human skin and therefore will be a very accepted and harmless product to use (Croc city, 2012). There are many claims of positive results when crocodile oil containing products have been used. It includes fading of freckles, treatment of acne and pimple marks, dark lines, wrinkles and laugh lines. It also includes vanishing of dark shadows, sun spots and other discolorations. It helps prevent discolorations from forming and makes the skin softer, brighter and more attractive. It also controls rashness and dryness (Croc city, 2012). Because of crocodile oil’s anti-ageing, anti-fungal and anti-bacterial effects claimed by crocodile oil suppliers, and due to the fact that little scientific data is available on crocodile oil, it was decided to investigate the claims. In this study, the aims and objectives were to use natural oil, namely crocodile oil, and investigate the fatty acid profile, anti-microbial and anti-fungal activity, anti-oxidant activity, toxicity studies, stability determination of crocodile oil lotion and clinical efficacy testing of the anti-ageing effects. To determine the fatty acid profile of crocodile oil, fatty acid methyl ester (FAME) analysis with gas chromatography were used. Identification of FAME peaks in the samples was made by comparing the relative retention times of FAME peaks from samples to those of reference standards. The composition of fatty acids in crocodile oil compared well to fatty acids found in human skin oil. Anti-microbial and anti-fungal tests were done by Envirocare Laboratories, North-West University, Potchefstroom. Staphylococcus aureus, Esterichia coli, Pseudomanas aeruginosa, Candida albicans, Brasiliensis, Propionibacterium acnes and Trichophyton rubrum cultures were used to determine the anti-microbial and anti-fungal activity of crocodile oil. Unfortunately no activity was observed. The anti-oxidant properties of crocodile oil and crocodile oil lotion were determined by using the most commonly used method for measuring Malondialdehyde (MDA) in biological samples, namely the thiobarbituric acid (TBA) test. This method is based on spectrophotometric quantification of the pink complex formed after reaction of MDA with two molecules of TBA. No anti-oxidant activity was observed in the oil or the lotion. Toxicity studies were performed by Dr. D. Goosen (BVSc Hons. Pret.) from Tswane University of Technology (Pretoria, South Africa). The studies showed that the lotion had no toxicity in the skin sensitisation, acute dermal toxicity and acute dermal irritation studies. To determine the stability of the crocodile oil lotion, the formulated products were store at 25 °C / 60% RH (relative humidity), 30 °C / 60% RH and 40 °C / 75% RH for 6 months in the original packaging as well as a glass container. The stability tests included pH, viscosity, visual appearance assessment, zeta-potential, droplet size and mass loss. The crocodile cream lotion was stable over the 6 months period in both containers. Clinical efficacy testing was performed at the CEL (Clinical Efficacy Laboratory) of the North-West University, Potchefstroom, South Africa. A short-term study over a period of 3 h was performed to investigate the hydrating effects of crocodile oil lotion. A long-term study over a period of 12 weeks was performed to examine the anti-ageing effects of crocodile oil lotion. An erythema study was also conducted to test the anti-erythema properties of crocodile oil lotion. Although the crocodile oil lotion as well as the placebo lotion showed an increase in skin hydration, there was no significant difference between the two treatments. Crocodile oil lotion also showed no anti-erythema properties. / Thesis (PhD (Pharmaceutics))--North-West University, Potchefstroom Campus, 2013.
13

A comparative analysis of EIA report quality before and after 2006 in South Africa / Aletta Johanna van Heerden

Van Heerden, Aletta Johanna January 2010 (has links)
On 18 June 2010 new NEMA 2010 EIA Regulations were promulgated and came into effect on 2 August 2010 in order to improve the effectiveness of EIA. The question of effectiveness, therefore still remains. The quality of EIRs under the 1997 regulations in South Africa has been researched, although not as extensively as in other parts of the world. It was concluded that the quality of EIRs in South Africa are generally satisfactory, although a number of problems were identified, e.g. timing of the EIA, the identification of activities which require authorization or not, the consideration of alternatives, the absence of any time limits, the absence of requirements for monitoring and enforcing compliance, and objectivity. The National Environmental Management Act (NEMA), (Act no 107, 1998) was amended and new regulations promulgated in 2006. No research has been published regarding the quality of EIRs produced in South Africa under the 2006 regulations. Since it was the intent of the new regulations to improve EIA effectiveness, it is necessary that the quality of EIRs produced under the new EIA system be investigated. As in the other studies in South Africa, the Lee and Colley review model was used as basis for the comparative analysis of the EIRs before and after 2006. A sample of 26 EIRs, 11 under the 1997 EIA system and 15 under the 2006 EIA system, obtained from the then Impact Assessment Directorate of the National Department of Environmental Affairs and Tourism (DEAT) archives in Pretoria were reviewed. The main conclusions were that the majority of the EIRs under the 1997 system were of an acceptable standard and that the overall quality of the EIRs did not improve after the promulgation of the 2006 regulations. The descriptive and presentational parts of the EIRs were more satisfactorily addressed, while the analytical parts such as impact significance were addressed less satisfactorily. EIR quality appears to be on par with international standards, but there are areas of distinct weaknesses. As the 2006 EIRs included some of the first EIRs conducted under the new regulations, there is potential for the quality to improve over time. However, the areas that still need attention are the identification and evaluation of impacts, impact magnitude and monitoring programmes. / Thesis (M.Sc. (Geography and Environmental Management))--North-West University, Potchefstroom Campus, 2011.
14

Preparation, stability and in vitro evaluation of liposomes containing amodiaquine / Jacques C. Scholtz

Scholtz, Jacques Coenraad January 2010 (has links)
Malaria is a curable disease that claims nearly one million lives each year. Problems with the treatment of malaria arise as resistance spreads and new treatment options are becoming less effective. The need for new treatments are of the utmost importance. Liposomes combined with antimalarials are a new avenue for research as liposomes can increase the efficacy of drugs against pathogens, as well as decreasing toxicity. Amodiaquine is a drug with known toxicity issues, but has proven to be effective and is, therefore, a prime candidate to be incorporated into the liposomal drug delivery system. The aim of this study was to prepare, characterize and evaluate the toxicity of the liposomes with incorporated amodiaquine. The solubility of amodiaquine was determined and liposomes formulated with, and without, amodiaquine entrapped. Accelerated stability studies (at 5 'C, 25 'C with relative humidity of 60% and 40 'C with a relative humidity of 40%) were conducted during which the size, pH, morphology and the entrapment efficacy was determined. The toxicity was determined in vitro by analysing the levels of reactive oxidative species and lipid peroxidation caused by the formulations to erythrocytes infected with P. falciparum as well as uninfected erythrocytes with flow cytometry. The solubility study of amodiaquine in different pH buffers showed that amodiaquine was more soluble at lower pH values. Solubility in solution with pH 4.5 was 36.3359 ± 0.7904mg/ml when compared to the solubility at pH 6.8, which was 15.6052 ± 1.1126 mg/ml. A buffer with a pH of 6 was used to ensure adequate solubility and acceptable compatibility with cells. Liposomes with incorporated amodiaquine were formulated with entrapment efficacies starting at 29.038 ± 2.599% and increasing to 51.914 ± 1.683%. The accelerated stability studies showed the median sizes and span values remained constant for both liposome and amodiaquine incorporated liposomes at 5 'C. The higher temperatures, i.e. 25 'C and 40 'C, displayed increases in the median size, and decreases in the span for both formulations. The conclusion can, therefore, be made that both liposome and amodiaquine incorporated liposomes are stable at lower temperatures. The entrapment efficacy increased from initial values to nearly 100% during the course of the stability study. This was attributed to amodiaquine precipitating from the solution. The pH values of the liposomes and amodiaquine incorporated liposomes remained constant for each formulation; though the amodiaquine incorporated liposomes had a lower starting pH, the formulations are both thought to be stable in terms of the pH. Toxicity studies revealed low levels of reactive oxygen species as well as low levels of lipid peroxidation for both liposome and amodiaquine incorporated liposomes, on both erythrocyte and Plasmodium infected erythrocytes. From the toxicity studies it can be concluded that liposomes and amodiaquine incorporated liposomes are not toxic to erythrocytes and infected erythrocytes. It was concluded that liposomes incorporating amodiaquine could possibly be used as a treatment option for malaria. / Thesis (M.Sc. (Pharmaceutics))--North-West University, Potchefstroom Campus, 2011.
15

A comparative analysis of EIA report quality before and after 2006 in South Africa / Aletta Johanna van Heerden

Van Heerden, Aletta Johanna January 2010 (has links)
On 18 June 2010 new NEMA 2010 EIA Regulations were promulgated and came into effect on 2 August 2010 in order to improve the effectiveness of EIA. The question of effectiveness, therefore still remains. The quality of EIRs under the 1997 regulations in South Africa has been researched, although not as extensively as in other parts of the world. It was concluded that the quality of EIRs in South Africa are generally satisfactory, although a number of problems were identified, e.g. timing of the EIA, the identification of activities which require authorization or not, the consideration of alternatives, the absence of any time limits, the absence of requirements for monitoring and enforcing compliance, and objectivity. The National Environmental Management Act (NEMA), (Act no 107, 1998) was amended and new regulations promulgated in 2006. No research has been published regarding the quality of EIRs produced in South Africa under the 2006 regulations. Since it was the intent of the new regulations to improve EIA effectiveness, it is necessary that the quality of EIRs produced under the new EIA system be investigated. As in the other studies in South Africa, the Lee and Colley review model was used as basis for the comparative analysis of the EIRs before and after 2006. A sample of 26 EIRs, 11 under the 1997 EIA system and 15 under the 2006 EIA system, obtained from the then Impact Assessment Directorate of the National Department of Environmental Affairs and Tourism (DEAT) archives in Pretoria were reviewed. The main conclusions were that the majority of the EIRs under the 1997 system were of an acceptable standard and that the overall quality of the EIRs did not improve after the promulgation of the 2006 regulations. The descriptive and presentational parts of the EIRs were more satisfactorily addressed, while the analytical parts such as impact significance were addressed less satisfactorily. EIR quality appears to be on par with international standards, but there are areas of distinct weaknesses. As the 2006 EIRs included some of the first EIRs conducted under the new regulations, there is potential for the quality to improve over time. However, the areas that still need attention are the identification and evaluation of impacts, impact magnitude and monitoring programmes. / Thesis (M.Sc. (Geography and Environmental Management))--North-West University, Potchefstroom Campus, 2011.
16

Preparation, stability and in vitro evaluation of liposomes containing amodiaquine / Jacques C. Scholtz

Scholtz, Jacques Coenraad January 2010 (has links)
Malaria is a curable disease that claims nearly one million lives each year. Problems with the treatment of malaria arise as resistance spreads and new treatment options are becoming less effective. The need for new treatments are of the utmost importance. Liposomes combined with antimalarials are a new avenue for research as liposomes can increase the efficacy of drugs against pathogens, as well as decreasing toxicity. Amodiaquine is a drug with known toxicity issues, but has proven to be effective and is, therefore, a prime candidate to be incorporated into the liposomal drug delivery system. The aim of this study was to prepare, characterize and evaluate the toxicity of the liposomes with incorporated amodiaquine. The solubility of amodiaquine was determined and liposomes formulated with, and without, amodiaquine entrapped. Accelerated stability studies (at 5 'C, 25 'C with relative humidity of 60% and 40 'C with a relative humidity of 40%) were conducted during which the size, pH, morphology and the entrapment efficacy was determined. The toxicity was determined in vitro by analysing the levels of reactive oxidative species and lipid peroxidation caused by the formulations to erythrocytes infected with P. falciparum as well as uninfected erythrocytes with flow cytometry. The solubility study of amodiaquine in different pH buffers showed that amodiaquine was more soluble at lower pH values. Solubility in solution with pH 4.5 was 36.3359 ± 0.7904mg/ml when compared to the solubility at pH 6.8, which was 15.6052 ± 1.1126 mg/ml. A buffer with a pH of 6 was used to ensure adequate solubility and acceptable compatibility with cells. Liposomes with incorporated amodiaquine were formulated with entrapment efficacies starting at 29.038 ± 2.599% and increasing to 51.914 ± 1.683%. The accelerated stability studies showed the median sizes and span values remained constant for both liposome and amodiaquine incorporated liposomes at 5 'C. The higher temperatures, i.e. 25 'C and 40 'C, displayed increases in the median size, and decreases in the span for both formulations. The conclusion can, therefore, be made that both liposome and amodiaquine incorporated liposomes are stable at lower temperatures. The entrapment efficacy increased from initial values to nearly 100% during the course of the stability study. This was attributed to amodiaquine precipitating from the solution. The pH values of the liposomes and amodiaquine incorporated liposomes remained constant for each formulation; though the amodiaquine incorporated liposomes had a lower starting pH, the formulations are both thought to be stable in terms of the pH. Toxicity studies revealed low levels of reactive oxygen species as well as low levels of lipid peroxidation for both liposome and amodiaquine incorporated liposomes, on both erythrocyte and Plasmodium infected erythrocytes. From the toxicity studies it can be concluded that liposomes and amodiaquine incorporated liposomes are not toxic to erythrocytes and infected erythrocytes. It was concluded that liposomes incorporating amodiaquine could possibly be used as a treatment option for malaria. / Thesis (M.Sc. (Pharmaceutics))--North-West University, Potchefstroom Campus, 2011.
17

Evaluation of a programme to facilitate positive youth development / A.J.W. Brink

Brink, Andrea Johanna Wilhelmine January 2010 (has links)
The South African context, in particular, is characterized by a definite need for the facilitation of the development of the youth in a more positive trajectory. Family structures are not always robust enough to support the positive development of the youth, owing to the demands made on single–parent families, amongst other reasons. Community structures may also be less supportive of the development of the youth, because of the impact of the changes associated with the transitional phase of the country during the past sixteen years (Meehan, Peirson & Fridjhon, 2007). Furthermore, young people under the age of 15 years comprise almost a third of the total South African population (Statistics South Africa, 2009), and in the future, they will have to be prepared for an adulthood faced with previously unknown challenges (United Nations Population Fund). The importance of the development of the youth, in order to enable them to contribute to their country in future, is acknowledged by the South African Governement (National Youth Commission website). This study was conducted within the parameters of the newly developing positive youth development (PYD) paradigm. The empirical level of this paradigm is well represented in the literature, indicating that the content areas, or the “what” of PYD, have been well elucidated. However, there is a lack of theory, especially with regard to models describing developmental change (Larson et al., 2004), and evaluation of interventions aiming at the facilitation of PYD. In order to contribute to the answering of the questions regarding the “how” of development, this study had the following main aims: a) the compilation of a theoretical model, describing developmental change in the youth; b) the operationalization of this model for intervention purposes; and c) the evaluation of a programme and the model on which it is based. The study is reported on in an article format, and comprises a total of three articles. The first article focuses on the process of the compilation of a theoretical model by means of: a) the construction of a comprehensive meta–theoretical matrix, b) the integration of theory that features in the PYD literature, and c) the expansion of the latter with theory from other compatible sub–disciplines in psychology. The resultant Positive Youth Development Intervention (PYDI) model provides a process–related description of developmental change ? and is one of the first models to do so. The second article describes the operationalization of the PYDI model, by means of an indication of the relevant constructs, phenomena and processes to be facilitated. Although recent research points to a relation between PYD and self–regulation, there has been no model, describing the role of self–regulation in the facilitation of the positive development of the youth. This study adapted a model from an educational context (Heckhausen & Gollwitzer, 1987 (as cited in Boekaerts & Niemivirta, 2005)), in order to describe the regular self–regulatory processes constituting the bi–directional interactions between the youth and their primary life contexts, as proposed by developmental systems theory (Lerner, 1998), the meta–theory to PYD (King et al., 2005). A further specifc contribution is that the presentation aspects of the programme material, aimed at facilitating the integration thereof, are addressed on a theoretical level. The third article describes the evaluation of the PYDI model and programme, with young adolescents in a school in a rural area as participants. A mixed–methods study, which has been shown to render much richer information than a quantitative study alone, was applied. Although the quantitative data did not prove the success of the programme, the qualitative data suggested that some aspects of self–regulation had indeed been facilitated successfully. A second follow–up assessment, conducted seventeen months later, indicated that certain skills had only become internalized by that time, suggesting that the implementation and evaluation of such a programme should be expanded over an extended time–frame. This study has contributed to the level of theory of PYD, by indicating, a) the lacunae, and b) that theory in compatible sub–disciplinary paradigms could be used in order to devise workable models for PYD. Furthermore, the process–related nature of the PYDI model and programme, owing to its adaptability to different needs, may be adapted and extended to be applicable to the needs of the diverse South African population. Recommendations regarding future application and research, especially within the South African context, have also been put forward in the study. / Thesis (Ph.D. (Psychology))--North-West University, Potchefstroom Campus, 2011.
18

Evaluation of a programme to facilitate positive youth development / A.J.W. Brink

Brink, Andrea Johanna Wilhelmine January 2010 (has links)
The South African context, in particular, is characterized by a definite need for the facilitation of the development of the youth in a more positive trajectory. Family structures are not always robust enough to support the positive development of the youth, owing to the demands made on single–parent families, amongst other reasons. Community structures may also be less supportive of the development of the youth, because of the impact of the changes associated with the transitional phase of the country during the past sixteen years (Meehan, Peirson & Fridjhon, 2007). Furthermore, young people under the age of 15 years comprise almost a third of the total South African population (Statistics South Africa, 2009), and in the future, they will have to be prepared for an adulthood faced with previously unknown challenges (United Nations Population Fund). The importance of the development of the youth, in order to enable them to contribute to their country in future, is acknowledged by the South African Governement (National Youth Commission website). This study was conducted within the parameters of the newly developing positive youth development (PYD) paradigm. The empirical level of this paradigm is well represented in the literature, indicating that the content areas, or the “what” of PYD, have been well elucidated. However, there is a lack of theory, especially with regard to models describing developmental change (Larson et al., 2004), and evaluation of interventions aiming at the facilitation of PYD. In order to contribute to the answering of the questions regarding the “how” of development, this study had the following main aims: a) the compilation of a theoretical model, describing developmental change in the youth; b) the operationalization of this model for intervention purposes; and c) the evaluation of a programme and the model on which it is based. The study is reported on in an article format, and comprises a total of three articles. The first article focuses on the process of the compilation of a theoretical model by means of: a) the construction of a comprehensive meta–theoretical matrix, b) the integration of theory that features in the PYD literature, and c) the expansion of the latter with theory from other compatible sub–disciplines in psychology. The resultant Positive Youth Development Intervention (PYDI) model provides a process–related description of developmental change ? and is one of the first models to do so. The second article describes the operationalization of the PYDI model, by means of an indication of the relevant constructs, phenomena and processes to be facilitated. Although recent research points to a relation between PYD and self–regulation, there has been no model, describing the role of self–regulation in the facilitation of the positive development of the youth. This study adapted a model from an educational context (Heckhausen & Gollwitzer, 1987 (as cited in Boekaerts & Niemivirta, 2005)), in order to describe the regular self–regulatory processes constituting the bi–directional interactions between the youth and their primary life contexts, as proposed by developmental systems theory (Lerner, 1998), the meta–theory to PYD (King et al., 2005). A further specifc contribution is that the presentation aspects of the programme material, aimed at facilitating the integration thereof, are addressed on a theoretical level. The third article describes the evaluation of the PYDI model and programme, with young adolescents in a school in a rural area as participants. A mixed–methods study, which has been shown to render much richer information than a quantitative study alone, was applied. Although the quantitative data did not prove the success of the programme, the qualitative data suggested that some aspects of self–regulation had indeed been facilitated successfully. A second follow–up assessment, conducted seventeen months later, indicated that certain skills had only become internalized by that time, suggesting that the implementation and evaluation of such a programme should be expanded over an extended time–frame. This study has contributed to the level of theory of PYD, by indicating, a) the lacunae, and b) that theory in compatible sub–disciplinary paradigms could be used in order to devise workable models for PYD. Furthermore, the process–related nature of the PYDI model and programme, owing to its adaptability to different needs, may be adapted and extended to be applicable to the needs of the diverse South African population. Recommendations regarding future application and research, especially within the South African context, have also been put forward in the study. / Thesis (Ph.D. (Psychology))--North-West University, Potchefstroom Campus, 2011.
19

Managing for improved school effectiveness at selected primary schools in the Gauteng province

Kobola, Matshidiso Walter 01 1900 (has links)
The research study investigated management strategies through which school effectiveness could be enhanced in primary schools situated in Gauteng Province. The enhancement of school effectiveness necessitated the discussion on school improvement to find ways to turn around the situation in dysfunctional schools in the province. The province is characterised by urban and suburban areas, townships, and informal settlements. Teachers in schools in these areas are well qualified. However, different challenges in these areas impact upon the enhancement of school effectiveness. A literature review was conducted to provide a conceptual framework and explain concepts such as effective management, administration, leadership, principal effectiveness, and teacher effectiveness. The literature review also investigated the factors that impact upon school effectiveness and school improvement and explored the historical development of School Effectiveness Research (SER) in the United States of America, Europe, Australia, and Africa to expound the problem investigated. An empirical investigation using a qualitative approach was conducted. Six primary schools were selected using purposive sampling to ensure that different demographic areas were covered in the research. Purposive sampling allowed the researcher to target schools from high and low socio-economic areas because they often experience different challenges concerning to school effectiveness. Data were collected through individual interviews with principals and officials from the Gauteng Department of Education (GDE) at the district and teachers in focus groups. Key findings were identified. Participants from the three categories respectively identified several characteristics of effective schools which concurred with the literature on school effectiveness. They also identified two features of effective schools which were unique to the study: in effective schools, there is little or no learner and teacher absenteeism; and school values which shape the behaviour of learners are clearly articulated. School values include trustworthiness, respectfulness, honesty, responsibility, striving for excellence and good leadership. School effectiveness is hindered by the current process of appointing principals which does not always succeed in selecting principals with the required leadership qualities and management skills. Further, the incorrect implementation of the Integrated Quality Management System (IQMS) in schools hinders teacher development and leads to poor teacher performance. / Die navorsingstudie ondersoek bestuurstrategieë waardeur die effektiwiteit van primêre skole, geleë in die Provinisie van Gauteng verhoog kan word. Die verhoging van effektiwiteit in skole het die bespreking oor skoolverbetering genoodsaak om maniere te vind om die situasie in disfunksionele skole in die provinisie om te draai. Die provinsie word gekenmerk deur landelike en stedelike gebiede, lokasies, en informele nedersetttings. Onderwysers van skole in hierdie gebiede is goed gekwalifiseerd. Verskeie uitdagings in hierdie gebiede het egter n uitwerking op die verhoging van effektiwiteit in skole. ʼn Literêre oorsig is uitgevoer om n konseptuele raamwerk te voorsien en om konsepte soos effektiewe bestuur, administrasie, leierskap, effektiwiteit van die skoolhoof, en onderwysers te verduidelik. ʼn Kwalitatiewe benadering is gebruik om die empiriese ondersoek uit te voer. Ses primêre skole is gekies en doelgerigte steekproefneming is gebruik om te verseker dat verskillende demografiese gebiede deel was van die navorsing. Doelgerigte steekproefneming het die navorser toegelaat om skole van hoë en lae sosio-ekonomiese gebiede te teiken omdat hulle dikwels verskillende uitdagings aangaande die effektiwiteit van skole ervaar. Data is versamel deur indivduele onderhoude met skoolhoofde en amptenare van Gauteng Onderwys Departement (GDE) by die distrik en deur fokusgroep onderhoude met onderwysers. Sleutelbevindinge was soos volg. Deelnemers uit die drie kategoriëë het onderskeidelik geidentifiseer met verskeie eienskappe van effektiewe skole wat ooreenstem met die literatuur op effektiwiteit in skole. Hulle het ook twee kenmerke van effektiewe skole wat uniek was tot die studie geïdentifiseer: in effektiewe skole is daar min of geen afwesigheid van leerders en onderwysers; en skoolwaardes wat die gedrag van leerders vorm word duidelik verwoord. Skoolwaardes sluit betroubaarheid, respek, eerlikheid, verantwoordelikheid, strewe na uitenmendheid en goeie leierskap in. Effektiwiteit in skole word verhinder deur die huidge proses van aanstelling van skoolhoofde wat nie altyd daarin slaag om skoolhoofde te kies wat die nodige leierskap en bestuurseienskappe het nie. Verder, die verkeerde implementering van die Geïntegreerde Bestuurstelsel (IQMS) in skole belemmer die ontwikkeling en lei tot swak prestasie van onderwysers. / Dinyakisiso tse tsa go ithuta di be di tsomana le mekgwanakgwana ya bolaodi bja thuto go tiisetsa gore dikolo tsa motheo Profentsheng ya Gauteng di soma mesomo yeo e nepagetsego. Tiisetso ya go soma mesomonepagetsego ya sekolo e dirile gore go ahlaahliwe hlabollo ya dikolo go humana ditselana tseo ka tsona re ka hlabolang dikolo tseo di sa someng botse mo profentsheng. Profentshe ya Gauteng e na le dikolo tsa motsesetoropong le tsa mo go bego go dula batho basweu fela. Barutisi mo mafelong a ba na le di thuto tse maleba. Fela, dihlotlo tseo dileng gona mo mafelong a di huetsa tiistso ya go soma mesomonepagatso sekolong. Go dirilwe tekololeswa ya dingwalwa go hlalosa dikgopolo tse bjalo ka taolonepagatso, boetapele, mesomonepagatso ya hlogo ya sekolo le mesomonepagatso ya morutisi. Tekololeswa ya dingwalwa e nyakisisitse dintlha tseo di huetsang mesomonepagetso sekolong le hlabollo ya sekolo go lebeletswe tswetsopele ya dinyakisiso tsamesomonepagatso ya dikiolo dinageng tsa United States of America, Europa, Australia le Afrika go hlalosa bothata bjo bo nyakisiswago. Go dirilwe dinyakisiso ka poledisano go somiswa mokgwa wa kwalitetifi. Go kgethilwe dikolo tse tshela tsa fase ka go somisa kgetho ka maikemisetso go direla gore go akaretswe dikolo go tswa mafelong a go fapana. Kgetho ka maikemisetso e dumelela monyakisisi go tswa mafelong a batho ba go ba le sa bona le mafelong a batho ba go hloka sa bona ka ge ba itemogela dihlotlo tse fapaneng mesomonepagatso. Tshedimoso ye e kgobokeditswe ka dipoledisano le dihlogo tsa dikolo motho a le nosi le bahlankedi bammuso wa Kgoro ya Thuto ya Kgauteng motho a le nosi le dipoledisano ka sehlopha. Dintlha tsa dipoelo di be di le mo go latelago: Batseakarolo go tswa mafapeng a go fapana ba hlaotse diponagalo tsa dikolo tseo disomago ka nepagalo tseo di dumelelanago le tekololeswa ya dingwalwa. Gape ba hlaotse dipanagalo tse dingwe tsa moswana nosi: Dikolo tsa go soma ka nepagalo ga di na barutwana goba barutisi ba go se tle sekolong. Meano ya sekolo e akaretsa botshephegi, tlhompho, boikarabelo le go somela bobotse ka go fetisa le boetapele bjo bo botse. Mosomonepagatso ya sekolo e sitiswa ke tshepediso ya go thwala dihlogo tsa dikolo yeo ka nako tse dinwe e sitago ke go hlaola hlogo ya sekolo yeo e nago le boetapele le bolaodi bjo bo botse. Gape, go tsentshatirisong wo o fasagetseng wa tshepetso ya bolaodi bja hlabollo ya barutisi go sitisa tswelopele. / Educational Management and Leadership / Ph. D. (Education Management)
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The middle management learning programme of the South African Police Service: a critical evaluation / L.S. Masilela

Masilela, Linkie Slinga January 2013 (has links)
The aim of this study was to assess the effective functioning of the Middle Management Learning Programme (MMLP) within the South African Police Service (SAPS), as well as evaluate the performance and effectiveness of employees who were sent for training to enhance their skills and develop their capacity in order to improve service delivery within the broader South African society. The research focused specifically on middle managers who had completed the MMLP. The MMLP was presented at the SAPS Academy in Thabong from 2007 to 2011. According to Meyer et al. (2004:225), a learning programme is a coordinated combination of learning activities, methodologies, processes and other elements of learning, crafted to assist learners to acquire the required knowledge, skills and attitudes. The primary objective of this study was, therefore, to evaluate the effective functioning of the MMLP within the SAPS and to provide sound recommendations based on the empirical findings. Semi-structured interviews and questionnaires were used to determine the effectiveness of the MMLP and obtain information from the respondents who completed the programme during the 2007/8 and 2009/10 financial years. The literature review, interviews and completion of the questionnaires by respondents confirmed the objectives of this study. The overall results indicated that the MMLP had a positive impact on middle managers in the SAPS. The middle managers appear to be driven by a need for recognition, and authorities could exploit this to its advantage by providing a reward system for good performance. The study concludes by, inter alia, recommending that the SAPS review its military culture or style, because the managers who attended the MMLP are unable to advise their seniors, respondents feel overwhelmed, powerless, and helpless and this leads to ineffectiveness in their performance. The requirements to attend the MMLP should be placed on record and should not be compromised to suit particular individuals. The MMLP should also be made a prerequisite for promotion as invaluable skills are transferred to course attendees. / Thesis (Master of Development and Management)--North-West University, Potchefstroom Campus, 2013

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