An assessment of the role of guidance and counselling in promoting learner discipline in secondary schools in the Oshikoto region of Namibia : a case study of learners with discipline problems
- Authors: Mbongo, Emelia Ndapandula
- Date: 2016
- Subjects: Educational counselling -- Namibia Counseling in secondary education -- Namibia School discipline -- Namibia School violence -- Namibia
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/2325 , vital:27753
- Description: The study assessed the role of guidance and counselling in promoting learner discipline in secondary schools in the Oshikoto region of Namibia. The study used the mixed methods approach, which resulted in providing qualitative and quantitative data to provide an understanding of the problem. The instruments for data collection were questionnaires for principals, teachers, teacher counsellors and learners, as well as one-on-one interviews with learners. Thirty-one (31) principals, ninety-eight (98) teachers, thirty-seven (37) teacher counsellors and four hundred and eighty-nine (489) learners participated in the study. Results from the questionnaires were analysed by using descriptive statistics in the form of frequencies and percentages. Data presentation took the form of tables and bar graphs. Qualitative data collected from interviews were transcribed and put into themes and categories. The study revealed that schools experienced a wide range of disciplinary problems. It was further revealed that learners are affected by issues emanating from the environment, namely, schools and societies which influence their behaviour negatively. The principals and teachers believe that exclusionary and punitive methods are effective in managing learner indiscipline, while teacher counsellors and learners were against the use of such methods. In addition, principals, teachers and teacher counsellors all have a major role to play in maintaining discipline in schools through guidance and counselling. Suggestions were thus made to strengthen the use of guidance and counselling in promoting learner discipline in secondary schools by: improving training for teacher counsellors/Life Skills teachers in guidance and counselling, sensitisation of school managers about the roles and responsibilities of teacher counsellors, including the role played by teacher counsellors in learner discipline, improved leadership from school principals, strengthening the co-ordination and communication among the school personnel, and by strengthening the referral system from teachers to teacher counsellors and from teacher counsellors to outside agencies. It was recommended that the use of guidance and counselling in promoting learner discipline would be strengthened if teacher counsellors’ training is improved, school principals are sensitised on the roles of teacher counsellors, including their role in learner discipline as well as improved co-ordination and communication among school personnel regarding learner discipline. The study further recommended that the referral system of learners experiencing problems from teachers to teacher counsellors and from teacher counsellors to outside agencies should be strengthened.
- Full Text:
- Date Issued: 2016
- Authors: Mbongo, Emelia Ndapandula
- Date: 2016
- Subjects: Educational counselling -- Namibia Counseling in secondary education -- Namibia School discipline -- Namibia School violence -- Namibia
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/2325 , vital:27753
- Description: The study assessed the role of guidance and counselling in promoting learner discipline in secondary schools in the Oshikoto region of Namibia. The study used the mixed methods approach, which resulted in providing qualitative and quantitative data to provide an understanding of the problem. The instruments for data collection were questionnaires for principals, teachers, teacher counsellors and learners, as well as one-on-one interviews with learners. Thirty-one (31) principals, ninety-eight (98) teachers, thirty-seven (37) teacher counsellors and four hundred and eighty-nine (489) learners participated in the study. Results from the questionnaires were analysed by using descriptive statistics in the form of frequencies and percentages. Data presentation took the form of tables and bar graphs. Qualitative data collected from interviews were transcribed and put into themes and categories. The study revealed that schools experienced a wide range of disciplinary problems. It was further revealed that learners are affected by issues emanating from the environment, namely, schools and societies which influence their behaviour negatively. The principals and teachers believe that exclusionary and punitive methods are effective in managing learner indiscipline, while teacher counsellors and learners were against the use of such methods. In addition, principals, teachers and teacher counsellors all have a major role to play in maintaining discipline in schools through guidance and counselling. Suggestions were thus made to strengthen the use of guidance and counselling in promoting learner discipline in secondary schools by: improving training for teacher counsellors/Life Skills teachers in guidance and counselling, sensitisation of school managers about the roles and responsibilities of teacher counsellors, including the role played by teacher counsellors in learner discipline, improved leadership from school principals, strengthening the co-ordination and communication among the school personnel, and by strengthening the referral system from teachers to teacher counsellors and from teacher counsellors to outside agencies. It was recommended that the use of guidance and counselling in promoting learner discipline would be strengthened if teacher counsellors’ training is improved, school principals are sensitised on the roles of teacher counsellors, including their role in learner discipline as well as improved co-ordination and communication among school personnel regarding learner discipline. The study further recommended that the referral system of learners experiencing problems from teachers to teacher counsellors and from teacher counsellors to outside agencies should be strengthened.
- Full Text:
- Date Issued: 2016
An assessment of the role of guidance and counselling in promoting learner discipline in secondary schools in the Oshikoto region of Namibia:a case study of learners with discipline problems
- Authors: Mbongo, Emelia Ndapandula
- Date: 2016
- Subjects: Educational counseling Counseling in secondary education -- Namibia School discipline -- Namibia
- Language: English
- Type: Thesis , Doctoral , Degree
- Identifier: http://hdl.handle.net/10353/5358 , vital:29215
- Description: The study assessed the role of guidance and counselling in promoting learner discipline in secondary schools in the Oshikoto region of Namibia. The study used the mixed methods approach, which resulted in providing qualitative and quantitative data to provide an understanding of the problem. The instruments for data collection were questionnaires for principals, teachers, teacher counsellors and learners, as well as one-on-one interviews with learners. Thirty-one (31) principals, ninety-eight (98) teachers, thirty-seven (37) teacher counsellors and four hundred and eighty-nine (489) learners participated in the study. Results from the questionnaires were analysed by using descriptive statistics in the form of frequencies and percentages. Data presentation took the form of tables and bar graphs. Qualitative data collected from interviews were transcribed and put into themes and categories. The study revealed that schools experienced a wide range of disciplinary problems. It was further revealed that learners are affected by issues emanating from the environment, namely, schools and societies which influence their behaviour negatively. The principals and teachers believe that exclusionary and punitive methods are effective in managing learner indiscipline, while teacher counsellors and learners were against the use of such methods. In addition, principals, teachers and teacher counsellors all have a major role to play in maintaining discipline in schools through guidance and counselling. Suggestions were thus made to strengthen the use of guidance and counselling in promoting learner discipline in secondary schools by: improving training for teacher counsellors/Life Skills teachers in guidance and counselling, sensitisation of school managers about the roles and responsibilities of teacher counsellors, including the role played by teacher counsellors in learner discipline, improved leadership from school principals, strengthening the co-ordination and communication among the school personnel, and by strengthening the referral system from teachers to teacher counsellors and from teacher counsellors to outside agencies. It was recommended that the use of guidance and counselling in promoting learner discipline would be strengthened if teacher counsellors’ training is improved, school principals are sensitised on the roles of teacher counsellors, including their role in learner discipline as well as improved co-ordination and communication among school personnel regarding learner discipline. The study further recommended that the referral system of learners experiencing problems from teachers to teacher counsellors and from teacher counsellors to outside agencies should be strengthened.
- Full Text:
- Date Issued: 2016
- Authors: Mbongo, Emelia Ndapandula
- Date: 2016
- Subjects: Educational counseling Counseling in secondary education -- Namibia School discipline -- Namibia
- Language: English
- Type: Thesis , Doctoral , Degree
- Identifier: http://hdl.handle.net/10353/5358 , vital:29215
- Description: The study assessed the role of guidance and counselling in promoting learner discipline in secondary schools in the Oshikoto region of Namibia. The study used the mixed methods approach, which resulted in providing qualitative and quantitative data to provide an understanding of the problem. The instruments for data collection were questionnaires for principals, teachers, teacher counsellors and learners, as well as one-on-one interviews with learners. Thirty-one (31) principals, ninety-eight (98) teachers, thirty-seven (37) teacher counsellors and four hundred and eighty-nine (489) learners participated in the study. Results from the questionnaires were analysed by using descriptive statistics in the form of frequencies and percentages. Data presentation took the form of tables and bar graphs. Qualitative data collected from interviews were transcribed and put into themes and categories. The study revealed that schools experienced a wide range of disciplinary problems. It was further revealed that learners are affected by issues emanating from the environment, namely, schools and societies which influence their behaviour negatively. The principals and teachers believe that exclusionary and punitive methods are effective in managing learner indiscipline, while teacher counsellors and learners were against the use of such methods. In addition, principals, teachers and teacher counsellors all have a major role to play in maintaining discipline in schools through guidance and counselling. Suggestions were thus made to strengthen the use of guidance and counselling in promoting learner discipline in secondary schools by: improving training for teacher counsellors/Life Skills teachers in guidance and counselling, sensitisation of school managers about the roles and responsibilities of teacher counsellors, including the role played by teacher counsellors in learner discipline, improved leadership from school principals, strengthening the co-ordination and communication among the school personnel, and by strengthening the referral system from teachers to teacher counsellors and from teacher counsellors to outside agencies. It was recommended that the use of guidance and counselling in promoting learner discipline would be strengthened if teacher counsellors’ training is improved, school principals are sensitised on the roles of teacher counsellors, including their role in learner discipline as well as improved co-ordination and communication among school personnel regarding learner discipline. The study further recommended that the referral system of learners experiencing problems from teachers to teacher counsellors and from teacher counsellors to outside agencies should be strengthened.
- Full Text:
- Date Issued: 2016
Preparation and application of plasmon metal enhanced titanium dioxide photocatalyst for the removal of organics in water
- Authors: Nyamukamba, Pardon
- Date: 2016
- Subjects: Water -- Purification -- Photocatalysis Titanium dioxide Water chemistry
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/2765 , vital:28074
- Description: Advanced oxidation processes are capable of removing organic compounds that cannot be removed by conventional water treatment methods. Among the oxidation processes, photo-catalysis using titanium dioxide (TiO2) is a promising method but suffers from rapid electron-hole recombination rates and only absorbs UV light which is a small percentage (5 percent) of the total solar radiation. Therefore there is a need to reduce the recombination rates and also extend the absorption of the photo-catalyst into the visible region which constitutes 55 percent of the total solar radiation. The major aims of this study were to prepare plasmon metal decorated and doped TiO2 photo-catalysts immobilized on quartz substrates and test their photo-catalytic and antimicrobial activities. The effect of film thickness (loading) and use of different shapes of plasmon metal nanostructures was investigated. TiO2 thin films were prepared by a sputter coating technique while plasmon metal (Au & Ag)/carbon co-doped TiO2 by a simple sol gel process and plasmon metal films were prepared by the thermal evaporation technique. Different plasmon metal nanostructures (nanorods, dendrites, nanowires and spherical nanoparticles) were prepared using a wet chemical technique using sodium borohydride as the reducing agent. Nanocomposites of co-doped TiO2 photo-catalyst and plasmon elements of different proportions were also prepared. The prepared photo-catalysts were coated onto etched and MPTMS (3-Mercaptopropyl trimethoxysliane) treated quartz glass substrate which is a stable support favouring easy recovery. The prepared materials were characterized by XRD, HRTEM, TEM, HRSEM, FT-IR, SEM, PIXE and TGA while the doped TiO2 was characterized by XPS, BET, CHNS and Raman Spectroscopy. The effect of pH of solution, presence of other contaminants and salts in solution, initial concentration of the model pollutant and type of the plasmonic elements on the photocatalytic activity of TiO2 towards 4-(4-sulfophenylazo)-N,N-dimethyl aniline (methyl orange) were also investigated. The selected TiO2 photo-catalyst films were tested for antimicrobial properties. The effect of different types of plasmon elements on the antimicrobial activity of TiO2 against E. coli ATCC 3695 was evaluated under both sunlight and weak UV light. Under UV light, Ag showed the highest enhancement in photo-catalytic activity of TiO2 than Au and Cu. The photo-catalytic activity of TiO2 increased with an increase in Ag content to an optimum loading and then started to decrease with a further increase in loading. For Cu and Au, photo-activity activity increased with an increase in plasmon metal content. Under sunlight, Cu showed the highest enhancement of TiO2 photocatalytic compared to Ag and Au. The change in order of deposition showed that Au films enhanced the photo-activity better when they were deposited underneath rather than on top of TiO2 on quartz supports but Ag films performed better in enhancing photo-activity when they were deposited on top of TiO2. The use of bimetallic layers and three layer systems of different plasmon elements enhanced photo-catalytic activity better than the use of a monometallic layer. The presence of other organic contaminants and salts in solutions was found to reduce the photo-degradation of methyl orange due to preferential adsorption of other contaminants. When the pH was increased, the photocatalytic activity of TiO2 towards methyl orange was reduced. In antimicrobial studies, it was found that the plasmon elements greatly improved the antibacterial action of TiO2 against Escherichia coli ATCC 3695 in water and the best antibacterial action was observed with silver/carbon co-doped TiO2 photo-catalyst under sunlight The doped samples consisted of polydisperse nanoparticles which were found to be beneficial for photo-catalytic activity enhancement under sunlight.
- Full Text:
- Date Issued: 2016
- Authors: Nyamukamba, Pardon
- Date: 2016
- Subjects: Water -- Purification -- Photocatalysis Titanium dioxide Water chemistry
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/2765 , vital:28074
- Description: Advanced oxidation processes are capable of removing organic compounds that cannot be removed by conventional water treatment methods. Among the oxidation processes, photo-catalysis using titanium dioxide (TiO2) is a promising method but suffers from rapid electron-hole recombination rates and only absorbs UV light which is a small percentage (5 percent) of the total solar radiation. Therefore there is a need to reduce the recombination rates and also extend the absorption of the photo-catalyst into the visible region which constitutes 55 percent of the total solar radiation. The major aims of this study were to prepare plasmon metal decorated and doped TiO2 photo-catalysts immobilized on quartz substrates and test their photo-catalytic and antimicrobial activities. The effect of film thickness (loading) and use of different shapes of plasmon metal nanostructures was investigated. TiO2 thin films were prepared by a sputter coating technique while plasmon metal (Au & Ag)/carbon co-doped TiO2 by a simple sol gel process and plasmon metal films were prepared by the thermal evaporation technique. Different plasmon metal nanostructures (nanorods, dendrites, nanowires and spherical nanoparticles) were prepared using a wet chemical technique using sodium borohydride as the reducing agent. Nanocomposites of co-doped TiO2 photo-catalyst and plasmon elements of different proportions were also prepared. The prepared photo-catalysts were coated onto etched and MPTMS (3-Mercaptopropyl trimethoxysliane) treated quartz glass substrate which is a stable support favouring easy recovery. The prepared materials were characterized by XRD, HRTEM, TEM, HRSEM, FT-IR, SEM, PIXE and TGA while the doped TiO2 was characterized by XPS, BET, CHNS and Raman Spectroscopy. The effect of pH of solution, presence of other contaminants and salts in solution, initial concentration of the model pollutant and type of the plasmonic elements on the photocatalytic activity of TiO2 towards 4-(4-sulfophenylazo)-N,N-dimethyl aniline (methyl orange) were also investigated. The selected TiO2 photo-catalyst films were tested for antimicrobial properties. The effect of different types of plasmon elements on the antimicrobial activity of TiO2 against E. coli ATCC 3695 was evaluated under both sunlight and weak UV light. Under UV light, Ag showed the highest enhancement in photo-catalytic activity of TiO2 than Au and Cu. The photo-catalytic activity of TiO2 increased with an increase in Ag content to an optimum loading and then started to decrease with a further increase in loading. For Cu and Au, photo-activity activity increased with an increase in plasmon metal content. Under sunlight, Cu showed the highest enhancement of TiO2 photocatalytic compared to Ag and Au. The change in order of deposition showed that Au films enhanced the photo-activity better when they were deposited underneath rather than on top of TiO2 on quartz supports but Ag films performed better in enhancing photo-activity when they were deposited on top of TiO2. The use of bimetallic layers and three layer systems of different plasmon elements enhanced photo-catalytic activity better than the use of a monometallic layer. The presence of other organic contaminants and salts in solutions was found to reduce the photo-degradation of methyl orange due to preferential adsorption of other contaminants. When the pH was increased, the photocatalytic activity of TiO2 towards methyl orange was reduced. In antimicrobial studies, it was found that the plasmon elements greatly improved the antibacterial action of TiO2 against Escherichia coli ATCC 3695 in water and the best antibacterial action was observed with silver/carbon co-doped TiO2 photo-catalyst under sunlight The doped samples consisted of polydisperse nanoparticles which were found to be beneficial for photo-catalytic activity enhancement under sunlight.
- Full Text:
- Date Issued: 2016
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