Using action cameras to assess habitat use by Pseudobarbus afer and Sandelia capensis in the Swartkops River, Eastern Cape, South Africa
- Authors: Hannweg, Bianca
- Date: 2018
- Subjects: Freshwater biodiversity -- South Africa -- Eastern Cape , Freshwater biodiversity conservation -- South Africa -- Eastern Cape , Freshwater ecology -- South Africa -- Eastern Cape , Freshwater fishes -- South Africa -- Eastern Cape , Freshwater fishes -- Behavior -- South Africa -- Eastern Cape , Freshwater fishes -- Habitat -- South Africa -- Eastern Cape , Underwater videography , Anabantidae -- South Africa -- Eastern Cape , Cyprinidae -- South Africa -- Eastern Cape , Pseudobarbus afer , Sandelia capensis
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/62039 , vital:28098
- Description: Currently, freshwater systems are facing various threats, freshwater biota are declining and there is an increased need to monitor freshwater fauna and flora using non-invasive methods. This thesis aimed to evaluate the potential of using action cameras as a tool for the monitoring of freshwater fish populations and the collection of habitat utilisation data. This evaluation was conducted in headwater tributaries of the Swartkops River in South Africa, using two threatened species that have not been extensively studied, Pseudobarbus afer (Peters, 1864) and Sandelia capensis (Cuvier, 1831). The aims of this study were to: (1) assess the use of underwater video analysis (UWVA) using action cameras (videos and still photographs) in comparison to estimates derived from snorkel surveys, to estimate the abundance of P. afer in headwater streams; (2) use estimates derived from UWVA (videos and photographs) to assess the habitat use of two imperilled species, P. afer and S. capensis; and (3) assess habitat use by these two species in the presence of an artificial habitat. This work demonstrated that: (1) estimates derived from videos and photographs were strongly correlated to estimates derived from snorkel surveys, provided multiple cameras were used; (2) estimates derived from videos and photographs were not significantly different to estimates derived from snorkel surveys; (3) a filming period of 15 minutes was sufficient at detecting 0.9 of the cumulative mMaxN (mean MaxN) within one of the five habitats; and (4) still photographs, which are less time consuming to process than videos, could be used in preference to videos. Based on these findings, techniques using action cameras to assess habitat utilisation and behaviour in situ of the two-focal species, were developed using six habitat types (inflow, outflow, woody debris, fern root, middle and artificial) in four pools. It was demonstrated that: (1) there was a significant difference in proportional occupancies across habitats for both P. afer and S. capensis; (2) Pseudobarbus afer were mainly observed schooling in the middle of the pool and feeding on detritus material in fern root, woody debris and off the artificial structure; and (3) Sandelia capensis rapidly colonised the artificial structure and were observed utilising it for refuge. In conclusion, this work demonstrated that still photographs from action cameras can be used in place of videos to estimate the abundance of freshwater fishes and assess their habitat use and behaviour in clear headwater streams. This work also demonstrated how action cameras could be used to evaluate the effect of the introduction of artificial habitat as a restoration measure for headwater fish communities.
- Full Text:
- Date Issued: 2018
- Authors: Hannweg, Bianca
- Date: 2018
- Subjects: Freshwater biodiversity -- South Africa -- Eastern Cape , Freshwater biodiversity conservation -- South Africa -- Eastern Cape , Freshwater ecology -- South Africa -- Eastern Cape , Freshwater fishes -- South Africa -- Eastern Cape , Freshwater fishes -- Behavior -- South Africa -- Eastern Cape , Freshwater fishes -- Habitat -- South Africa -- Eastern Cape , Underwater videography , Anabantidae -- South Africa -- Eastern Cape , Cyprinidae -- South Africa -- Eastern Cape , Pseudobarbus afer , Sandelia capensis
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/62039 , vital:28098
- Description: Currently, freshwater systems are facing various threats, freshwater biota are declining and there is an increased need to monitor freshwater fauna and flora using non-invasive methods. This thesis aimed to evaluate the potential of using action cameras as a tool for the monitoring of freshwater fish populations and the collection of habitat utilisation data. This evaluation was conducted in headwater tributaries of the Swartkops River in South Africa, using two threatened species that have not been extensively studied, Pseudobarbus afer (Peters, 1864) and Sandelia capensis (Cuvier, 1831). The aims of this study were to: (1) assess the use of underwater video analysis (UWVA) using action cameras (videos and still photographs) in comparison to estimates derived from snorkel surveys, to estimate the abundance of P. afer in headwater streams; (2) use estimates derived from UWVA (videos and photographs) to assess the habitat use of two imperilled species, P. afer and S. capensis; and (3) assess habitat use by these two species in the presence of an artificial habitat. This work demonstrated that: (1) estimates derived from videos and photographs were strongly correlated to estimates derived from snorkel surveys, provided multiple cameras were used; (2) estimates derived from videos and photographs were not significantly different to estimates derived from snorkel surveys; (3) a filming period of 15 minutes was sufficient at detecting 0.9 of the cumulative mMaxN (mean MaxN) within one of the five habitats; and (4) still photographs, which are less time consuming to process than videos, could be used in preference to videos. Based on these findings, techniques using action cameras to assess habitat utilisation and behaviour in situ of the two-focal species, were developed using six habitat types (inflow, outflow, woody debris, fern root, middle and artificial) in four pools. It was demonstrated that: (1) there was a significant difference in proportional occupancies across habitats for both P. afer and S. capensis; (2) Pseudobarbus afer were mainly observed schooling in the middle of the pool and feeding on detritus material in fern root, woody debris and off the artificial structure; and (3) Sandelia capensis rapidly colonised the artificial structure and were observed utilising it for refuge. In conclusion, this work demonstrated that still photographs from action cameras can be used in place of videos to estimate the abundance of freshwater fishes and assess their habitat use and behaviour in clear headwater streams. This work also demonstrated how action cameras could be used to evaluate the effect of the introduction of artificial habitat as a restoration measure for headwater fish communities.
- Full Text:
- Date Issued: 2018
Using ambient noise tomography to image the Eastern Cape-Karoo and Karoo regions, South Africa
- Bezuidenhout, Lucian John-Ross
- Authors: Bezuidenhout, Lucian John-Ross
- Date: 2018
- Subjects: Geometric tomography -- South Africa , Geobiology Geology -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/23602 , vital:30585
- Description: The primary aim of this thesis was to explore the use of ambient seismic noise as a tool to map the subsurface of the Cape-Karoo and Karoo region of South Africa. The Karoo is an ideal laboratory to use ambient seismic signal to map the shallow subsurface, as it is a quiet and pristine environment with a relatively well known geology. Ambient seismic signals were continuously recorded at three independent networks (ArrayA, ArrayB and ArrayC). ArrayA and ArrayB comprised 17 temporary stand-alone seismic stations each and recorded ambient noise wavefields for a ten week period between August and October 2015. ArrayC comprised 19 temporary stand-alone seismic stations, recording ambient seismic noise for a period of six weeks between June and July 2016. ArrayA and ArrayB were installed in the south-eastern Cape-Karoo region, near the town of Jansenville and ArrayC was installed near the Cradock-Tarkastad region of South Africa. This thesis is made up of two separate studies. Firstly, the retrieval and coherency of Rayleigh surface waves extracted from the vertical component recordings. For the first time in the south-eastern Cape-Karoo and Karoo area, estimates of Green’s function from cross-correlating ambient noise data between stations pairs were reconstructed and shown, which can be successfully used to image the subsurface. The stacked cross-correlations between all station pairs show clear arrivals of the Rayleigh surface waves. The group velocities of the Rayleigh waves in the 2 to 7 seconds period range were picked and inverted to compute the 2-D group velocity maps. For ArrayA and ArrayB, the resulting 2-D group velocity maps at different periods resulted in a group velocity model from approximately 2 to 7 km depth, which generally show a high velocity anomaly in the north of the study area, most likely imaging the denser, thick sedimentary basin of the Karoo (Carboniferous-Permian). To the south, the low velocity anomaly likely corresponds to the overlying Jurassic- Cretaceous sequences of the younger Algoa Basin (Uitenhage Group). For ArrayC, the group velocity maps showed high velocity regions, which is consistent with the dolerite sill intrusions in the Karoo and the low velocity structures, which was interpreted as the Karoo sediments. Secondly, the study comprised of characterizing the ambient seismic noise source. The first order analysis of the symmetry of the cross-correlation function showed that, although the ambient noise sources are relatively homogeneously distributed in the study area, most (energetic) of the ambient seismic noise propagates from the coast of South Africa. This was verified by analyzing the azimuthal distribution of the ambient seismic noise.
- Full Text:
- Date Issued: 2018
- Authors: Bezuidenhout, Lucian John-Ross
- Date: 2018
- Subjects: Geometric tomography -- South Africa , Geobiology Geology -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/23602 , vital:30585
- Description: The primary aim of this thesis was to explore the use of ambient seismic noise as a tool to map the subsurface of the Cape-Karoo and Karoo region of South Africa. The Karoo is an ideal laboratory to use ambient seismic signal to map the shallow subsurface, as it is a quiet and pristine environment with a relatively well known geology. Ambient seismic signals were continuously recorded at three independent networks (ArrayA, ArrayB and ArrayC). ArrayA and ArrayB comprised 17 temporary stand-alone seismic stations each and recorded ambient noise wavefields for a ten week period between August and October 2015. ArrayC comprised 19 temporary stand-alone seismic stations, recording ambient seismic noise for a period of six weeks between June and July 2016. ArrayA and ArrayB were installed in the south-eastern Cape-Karoo region, near the town of Jansenville and ArrayC was installed near the Cradock-Tarkastad region of South Africa. This thesis is made up of two separate studies. Firstly, the retrieval and coherency of Rayleigh surface waves extracted from the vertical component recordings. For the first time in the south-eastern Cape-Karoo and Karoo area, estimates of Green’s function from cross-correlating ambient noise data between stations pairs were reconstructed and shown, which can be successfully used to image the subsurface. The stacked cross-correlations between all station pairs show clear arrivals of the Rayleigh surface waves. The group velocities of the Rayleigh waves in the 2 to 7 seconds period range were picked and inverted to compute the 2-D group velocity maps. For ArrayA and ArrayB, the resulting 2-D group velocity maps at different periods resulted in a group velocity model from approximately 2 to 7 km depth, which generally show a high velocity anomaly in the north of the study area, most likely imaging the denser, thick sedimentary basin of the Karoo (Carboniferous-Permian). To the south, the low velocity anomaly likely corresponds to the overlying Jurassic- Cretaceous sequences of the younger Algoa Basin (Uitenhage Group). For ArrayC, the group velocity maps showed high velocity regions, which is consistent with the dolerite sill intrusions in the Karoo and the low velocity structures, which was interpreted as the Karoo sediments. Secondly, the study comprised of characterizing the ambient seismic noise source. The first order analysis of the symmetry of the cross-correlation function showed that, although the ambient noise sources are relatively homogeneously distributed in the study area, most (energetic) of the ambient seismic noise propagates from the coast of South Africa. This was verified by analyzing the azimuthal distribution of the ambient seismic noise.
- Full Text:
- Date Issued: 2018
Using reading to learn pedagogy to enhance the English first additional language teachers’ classroom practice
- Authors: Mawela, Rethabile Rejoice
- Date: 2018
- Subjects: Reading to learn , Language transfer (Language learning) -- South Africa -- Kuruman , Language teachers -- South Africa -- Kuruman , Language and languages -- Study and teaching -- Bilingual method , Second language acquisition
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63415 , vital:28409
- Description: Drawing from the Hallidayan, Bernsteinian and Vygotskyan theories of Systemic Functional Linguistics, Pedagogic Discourse and Social Learning, this study examined the role that Rose's (2005) Reading to Learn (RtL) pedagogy could play in the development of teachers’ pedagogic practices in the teaching of English First Additional Language. The study participants teach English First Additional Language in Black, materially and economically disadvantaged rural primary schools in Kuruman, the Northern Cape Province, South Africa. As study participants, 4 intermediate phase and 4 senior phase teachers of English First Additional Language were purposively selected from 6 rural schools. Located within the Critical Paradigm, Subjective Epistemology and Mixed-Method approach, the study used documentary evidence, semi- structured interviews and RtL pedagogy as research instruments. Research findings reveal that RtL enriched and advanced teachers’ pedagogic practice in the teaching of reading and writing. As a consequence, teachers’ classroom practice of the 8 study participants improved as evidenced as their content knowledge expanded, the quality of teaching developed and their perceptions of themselves as professionals was transformed. An accompanying finding is that teachers acquired the tools to teach reading and the reading and writing proficiencies of learners in their classrooms improved.
- Full Text:
- Date Issued: 2018
- Authors: Mawela, Rethabile Rejoice
- Date: 2018
- Subjects: Reading to learn , Language transfer (Language learning) -- South Africa -- Kuruman , Language teachers -- South Africa -- Kuruman , Language and languages -- Study and teaching -- Bilingual method , Second language acquisition
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63415 , vital:28409
- Description: Drawing from the Hallidayan, Bernsteinian and Vygotskyan theories of Systemic Functional Linguistics, Pedagogic Discourse and Social Learning, this study examined the role that Rose's (2005) Reading to Learn (RtL) pedagogy could play in the development of teachers’ pedagogic practices in the teaching of English First Additional Language. The study participants teach English First Additional Language in Black, materially and economically disadvantaged rural primary schools in Kuruman, the Northern Cape Province, South Africa. As study participants, 4 intermediate phase and 4 senior phase teachers of English First Additional Language were purposively selected from 6 rural schools. Located within the Critical Paradigm, Subjective Epistemology and Mixed-Method approach, the study used documentary evidence, semi- structured interviews and RtL pedagogy as research instruments. Research findings reveal that RtL enriched and advanced teachers’ pedagogic practice in the teaching of reading and writing. As a consequence, teachers’ classroom practice of the 8 study participants improved as evidenced as their content knowledge expanded, the quality of teaching developed and their perceptions of themselves as professionals was transformed. An accompanying finding is that teachers acquired the tools to teach reading and the reading and writing proficiencies of learners in their classrooms improved.
- Full Text:
- Date Issued: 2018
Vachellia erioloba (camel thorn) and microbial interactions
- Authors: Van Aswegen, Sunet
- Date: 2018
- Subjects: Vesicular-arbuscular mycorrhizas , Cadmium , Rhizobacteria , Plant growth-promoting rhizobacteria , Acacia erioloba
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10962/63716 , vital:28475
- Description: Vachellia erioloba (camel thorn) is one of South Africa’s economically important tree species and therefore requires further investigation to improve its health and growth. Beneficial soil microbes have positive effects on plants through various mechanisms such as nitrogen fixation, phosphate solubilisation, indole acetic acid and siderophore production and biofilm formation. These traits enhance plant growth and protect the host plant against parasitic organisms that are present in soil. The arbuscular mycorrhizal (AM) fungi are well known for their beneficial symbiotic effects on host plants. The objective of this study was to determine the role of AM fungi and associated beneficial rhizobacteria in improving the growth of V. erioloba seedlings. Soil and root samples were collected from a farm in the Northern Cape, South Africa. Fifty-seven bacterial cultures were isolated from the soil and tested for plant growth promoting characteristics. Fourteen isolates showing at least four beneficial traits were molecularly identified using the GenBank database. The AM fungal and bacterial populations in the soil samples were assessed using Illumina sequencing. Sequences were identified using the MaarJAM and GenBank databases, respectively. Three separate pot trials were conducted to determine; 1) the effects of cadmium (Cd) on seedling growth; 2) the individual effects of three selected bacterial isolates and AM fungi alone and combined on seedling growth, and 3) the combined effects of the selected bacteria on AM fungal inoculated and uninoculated seedlings. Of the fourteen isolates the Enterobacter genera was the dominant species identified, with Acinetobacter, Pantoea and Bacillus each having one isolate. All were described as plant growth promoting rhizobacteria. One isolate from each genus, excluding Pantoea, was used in the pot trials. Three genera were identified in the AM fungal population that was assessed, namely Ambispora, Paraglomus and Glomus with Ambispora being the dominant genus. The bacterial population assessed showed a high diversity of bacteria from the Actinobacteria phylum being the dominant group. The results of the heavy metal pot trial showed that the symbiotic relationship between the seedlings and AM fungi increased the seedlings’ health and growth during heavy metal stress. The combination of bacteria and AM fungi increased growth parameters in all the inoculated seedlings, but not when compared to uninoculated seedlings indicating a possible competition for nutrients. The results were influenced by the presence of a nematode, which was suspected to have been seed borne. Further investigations on these interactions are required. Inoculation of AM fungi and selected PGPR is recommended for V. erioloba seedling production. , Thesis (MSc) -- Faculty of Science, Biochemistry and Microbiology, 2018
- Full Text:
- Date Issued: 2018
- Authors: Van Aswegen, Sunet
- Date: 2018
- Subjects: Vesicular-arbuscular mycorrhizas , Cadmium , Rhizobacteria , Plant growth-promoting rhizobacteria , Acacia erioloba
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10962/63716 , vital:28475
- Description: Vachellia erioloba (camel thorn) is one of South Africa’s economically important tree species and therefore requires further investigation to improve its health and growth. Beneficial soil microbes have positive effects on plants through various mechanisms such as nitrogen fixation, phosphate solubilisation, indole acetic acid and siderophore production and biofilm formation. These traits enhance plant growth and protect the host plant against parasitic organisms that are present in soil. The arbuscular mycorrhizal (AM) fungi are well known for their beneficial symbiotic effects on host plants. The objective of this study was to determine the role of AM fungi and associated beneficial rhizobacteria in improving the growth of V. erioloba seedlings. Soil and root samples were collected from a farm in the Northern Cape, South Africa. Fifty-seven bacterial cultures were isolated from the soil and tested for plant growth promoting characteristics. Fourteen isolates showing at least four beneficial traits were molecularly identified using the GenBank database. The AM fungal and bacterial populations in the soil samples were assessed using Illumina sequencing. Sequences were identified using the MaarJAM and GenBank databases, respectively. Three separate pot trials were conducted to determine; 1) the effects of cadmium (Cd) on seedling growth; 2) the individual effects of three selected bacterial isolates and AM fungi alone and combined on seedling growth, and 3) the combined effects of the selected bacteria on AM fungal inoculated and uninoculated seedlings. Of the fourteen isolates the Enterobacter genera was the dominant species identified, with Acinetobacter, Pantoea and Bacillus each having one isolate. All were described as plant growth promoting rhizobacteria. One isolate from each genus, excluding Pantoea, was used in the pot trials. Three genera were identified in the AM fungal population that was assessed, namely Ambispora, Paraglomus and Glomus with Ambispora being the dominant genus. The bacterial population assessed showed a high diversity of bacteria from the Actinobacteria phylum being the dominant group. The results of the heavy metal pot trial showed that the symbiotic relationship between the seedlings and AM fungi increased the seedlings’ health and growth during heavy metal stress. The combination of bacteria and AM fungi increased growth parameters in all the inoculated seedlings, but not when compared to uninoculated seedlings indicating a possible competition for nutrients. The results were influenced by the presence of a nematode, which was suspected to have been seed borne. Further investigations on these interactions are required. Inoculation of AM fungi and selected PGPR is recommended for V. erioloba seedling production. , Thesis (MSc) -- Faculty of Science, Biochemistry and Microbiology, 2018
- Full Text:
- Date Issued: 2018
Vanadium-based catalysts for oxidation of organosulfur compounds: synthesis, catalysis and mechanistic studies
- Dembaremba, Tendai, Ogunlaja, Adeniyi
- Authors: Dembaremba, Tendai , Ogunlaja, Adeniyi
- Date: 2018
- Subjects: Organosulfur compounds
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/30248 , vital:30909
- Description: A series of oxidovanadium(IV) complexes based on the ligand, 2-(2’-hydroxyphenyl)imidazole, with substituent groups of different electronegativities on the phenolic para position, were successfully synthesized, characterized and investigated for their catalytic activities in the oxidation of dibenzothiophene (DBT), a typical refractory sulfur compound found in fuel. It was observed from catalytic oxidation studies that the presence of an electron withdrawing group on the phenolic para position of the ligand results in higher catalytic activity. SC-XRD data and DFT studies were used to explain the trends in activity observed. The highest activity was observed with 6.5 nmol of the nitro derivative catalyst [VO(PIMNO2)2] when 100% of 100 mg (0.543 mmol) of DBT was converted to its sulfone derivative dibenzothiophene sulfoxide (DBTO2) using 2.0 mL (1.05 mmol) of t-BuOOH. Potential to immobilize the complex catalysts was demonstrated through the synthesis of oxidovanadium(IV) copolymer nanofibers. The oxidovanadium nanofibers were successfully employed in the oxidation of sulfur compounds in a real fuel sample (diesel 500) which were then removed through solvent extraction using acetonitrile to give clean fuel. SC-XRD, EPR and UV-Vis spectroscopy were instrumental in providing insight into the mechanism of the catalyzed reaction. Vanadium oxides were also investigated as a cheaper alternative for the catalytic oxidation reaction. Phases of different vanadium oxides were synthesized by calcining NH4VO3 in air at different temperatures with an intention to investigate them for their catalytic activities. The catalyst obtained from calcination at 600⁰C was predominantly the orthorhombic phase of V2O5. Potential to immobilize the vanadium oxides was demonstrated using a silica support where NH4VO3 was impregnated onto silica and calcined in air at 600⁰C. The catalyst showed good potential in the oxidation of DBT to DBTO2, with 10 mg (43.9 μmol) of catalyst successfully converting 100% of 100 mg (0.543 mmol) DBT to DBTO2 using 2.0 mL (1.05 mmol) of t-BuOOH. The catalyst was also employed for a real fuel sample (diesel 500) with good results. The mechanistic aspects of vanadium oxides were also investigated in this study.
- Full Text:
- Date Issued: 2018
- Authors: Dembaremba, Tendai , Ogunlaja, Adeniyi
- Date: 2018
- Subjects: Organosulfur compounds
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/30248 , vital:30909
- Description: A series of oxidovanadium(IV) complexes based on the ligand, 2-(2’-hydroxyphenyl)imidazole, with substituent groups of different electronegativities on the phenolic para position, were successfully synthesized, characterized and investigated for their catalytic activities in the oxidation of dibenzothiophene (DBT), a typical refractory sulfur compound found in fuel. It was observed from catalytic oxidation studies that the presence of an electron withdrawing group on the phenolic para position of the ligand results in higher catalytic activity. SC-XRD data and DFT studies were used to explain the trends in activity observed. The highest activity was observed with 6.5 nmol of the nitro derivative catalyst [VO(PIMNO2)2] when 100% of 100 mg (0.543 mmol) of DBT was converted to its sulfone derivative dibenzothiophene sulfoxide (DBTO2) using 2.0 mL (1.05 mmol) of t-BuOOH. Potential to immobilize the complex catalysts was demonstrated through the synthesis of oxidovanadium(IV) copolymer nanofibers. The oxidovanadium nanofibers were successfully employed in the oxidation of sulfur compounds in a real fuel sample (diesel 500) which were then removed through solvent extraction using acetonitrile to give clean fuel. SC-XRD, EPR and UV-Vis spectroscopy were instrumental in providing insight into the mechanism of the catalyzed reaction. Vanadium oxides were also investigated as a cheaper alternative for the catalytic oxidation reaction. Phases of different vanadium oxides were synthesized by calcining NH4VO3 in air at different temperatures with an intention to investigate them for their catalytic activities. The catalyst obtained from calcination at 600⁰C was predominantly the orthorhombic phase of V2O5. Potential to immobilize the vanadium oxides was demonstrated using a silica support where NH4VO3 was impregnated onto silica and calcined in air at 600⁰C. The catalyst showed good potential in the oxidation of DBT to DBTO2, with 10 mg (43.9 μmol) of catalyst successfully converting 100% of 100 mg (0.543 mmol) DBT to DBTO2 using 2.0 mL (1.05 mmol) of t-BuOOH. The catalyst was also employed for a real fuel sample (diesel 500) with good results. The mechanistic aspects of vanadium oxides were also investigated in this study.
- Full Text:
- Date Issued: 2018
Variation in perception of environmental change in nine Solomon Islands communities: implications for securing fairness in community-based adaptation
- Ensor, Jonathan Edward, Abernethy, Kirsten Elizabeth, Hoddy, Eric Timothy, Aswani, Shankar, Albert, Simon, Vaccaro, Ismael, Benedict, Jason Jon, Beare, Douglas James
- Authors: Ensor, Jonathan Edward , Abernethy, Kirsten Elizabeth , Hoddy, Eric Timothy , Aswani, Shankar , Albert, Simon , Vaccaro, Ismael , Benedict, Jason Jon , Beare, Douglas James
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/145380 , vital:38433 , DOI: 10.1007/s10113-017-1242-1
- Description: Community-based approaches are pursued in recognition of the need for place-based responses to environmental change that integrate local understandings of risk and vulnerability. Yet the potential for fair adaptation is intimately linked to how variations in perceptions of environmental change and risk are treated. There is, however, little empirical evidence of the extent and nature of variations in risk perception in and between multiple community settings. Here, we rely on data from 231 semi-structured interviews conducted in nine communities in Western Province, Solomon Islands, to statistically model different perceptions of risk and change within and between communities.
- Full Text:
- Date Issued: 2018
- Authors: Ensor, Jonathan Edward , Abernethy, Kirsten Elizabeth , Hoddy, Eric Timothy , Aswani, Shankar , Albert, Simon , Vaccaro, Ismael , Benedict, Jason Jon , Beare, Douglas James
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/145380 , vital:38433 , DOI: 10.1007/s10113-017-1242-1
- Description: Community-based approaches are pursued in recognition of the need for place-based responses to environmental change that integrate local understandings of risk and vulnerability. Yet the potential for fair adaptation is intimately linked to how variations in perceptions of environmental change and risk are treated. There is, however, little empirical evidence of the extent and nature of variations in risk perception in and between multiple community settings. Here, we rely on data from 231 semi-structured interviews conducted in nine communities in Western Province, Solomon Islands, to statistically model different perceptions of risk and change within and between communities.
- Full Text:
- Date Issued: 2018
Verstegniese aspekte van Daniel Hugo se poësie met spesifieke verwysing na Die Twaalde Letter
- Authors: De Wee, Magdalena
- Date: 2018
- Subjects: Hugo, Daniel -- Criticism and interpretation , Afrikaans poetry -- 20th century -- History and criticism
- Language: Afrikaans
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/29892 , vital:30790
- Description: This dissertation focuses in particular on the different poetic devices used by the Afrikaans poet Daniel Hugo when composing his collection of poems called Die Twaalfde Letter. At first an overview is given of Hugo’s extensive oeuvre, the recurring themes, motifs etc. and subsequently the reception of the collection under discussion. Close readings of poems to establish the rhyme patterns, the rhythm and metre, as well as the different poetic forms used by the poet will be discussed and analyse within the context of the collection as a whole. In the addendum to the dissertation the researcher will include a selection of her own poems based on an engagement with the poetic devices used by Hugo. This is one of the first dissertations dealing exclusively with Hugo’s poetry.
- Full Text:
- Date Issued: 2018
- Authors: De Wee, Magdalena
- Date: 2018
- Subjects: Hugo, Daniel -- Criticism and interpretation , Afrikaans poetry -- 20th century -- History and criticism
- Language: Afrikaans
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/29892 , vital:30790
- Description: This dissertation focuses in particular on the different poetic devices used by the Afrikaans poet Daniel Hugo when composing his collection of poems called Die Twaalfde Letter. At first an overview is given of Hugo’s extensive oeuvre, the recurring themes, motifs etc. and subsequently the reception of the collection under discussion. Close readings of poems to establish the rhyme patterns, the rhythm and metre, as well as the different poetic forms used by the poet will be discussed and analyse within the context of the collection as a whole. In the addendum to the dissertation the researcher will include a selection of her own poems based on an engagement with the poetic devices used by Hugo. This is one of the first dissertations dealing exclusively with Hugo’s poetry.
- Full Text:
- Date Issued: 2018
Violations of good security practices in graphical passwords schemes: Enterprise constraints on scheme-design
- Vorster, Johannes, Irwin, Barry V W, van Heerden, Renier P
- Authors: Vorster, Johannes , Irwin, Barry V W , van Heerden, Renier P
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/430324 , vital:72683 , https://researchspace.csir.co.za/dspace/bitstream/handle/10204/10919/Vorster_22337_2018.pdf?sequence=1isAllowed=y
- Description: During the past decade, the sophistication and maturity of Enterprise-level Information Security (EIS) Standards and Systems has increased significantly. This maturity, particularly in the handling of enterprise-wide capability models, has led to a set of standards – e.g. ISO/IEC 27001, NIST 800-53, ISO/IEC 27789 and CSA CCM – that propose controls applicable to the implementation of an Information Security Manage-ment System (ISMS). By nature, the academic community is fruitful in its endeavour to propose new password schemes; and Graphical Passwords (GPs) have had many proposals for schemes. In this paper, we explore the impact of good security standards and lessons-learnt over the past decade of EID as a model of constraint on GPs schemes. The paper focuses on a number of GP schemes and points out the var-ious security constraints and limitations, if such schemes are to be im-plemented at the enterprise level.
- Full Text:
- Date Issued: 2018
- Authors: Vorster, Johannes , Irwin, Barry V W , van Heerden, Renier P
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/430324 , vital:72683 , https://researchspace.csir.co.za/dspace/bitstream/handle/10204/10919/Vorster_22337_2018.pdf?sequence=1isAllowed=y
- Description: During the past decade, the sophistication and maturity of Enterprise-level Information Security (EIS) Standards and Systems has increased significantly. This maturity, particularly in the handling of enterprise-wide capability models, has led to a set of standards – e.g. ISO/IEC 27001, NIST 800-53, ISO/IEC 27789 and CSA CCM – that propose controls applicable to the implementation of an Information Security Manage-ment System (ISMS). By nature, the academic community is fruitful in its endeavour to propose new password schemes; and Graphical Passwords (GPs) have had many proposals for schemes. In this paper, we explore the impact of good security standards and lessons-learnt over the past decade of EID as a model of constraint on GPs schemes. The paper focuses on a number of GP schemes and points out the var-ious security constraints and limitations, if such schemes are to be im-plemented at the enterprise level.
- Full Text:
- Date Issued: 2018
Voices of women who have transitioned from a shelter for survivors of domestic violence to independent living
- Authors: Moonieyan, Chrislynn
- Date: 2018
- Subjects: Family violence Shelters for the homeless Homeless persons
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/12939 , vital:39407
- Description: Domestic violence is a devastating social ill in South Africa and especially in the Eastern Cape. There were 12059 cases of domestic violence reported at police stations in the Eastern Cape between 2015 and 2017 (Dayimani, 2017). Domestic violence is broadly defined as any act of abuse resulting in harm or suffering experienced by women enacted by an intimate partner (Goosen & Shaik, 2008). One in four women experience physical violence in their lifetime (Rasool, 2015). Women who experience domestic violence often lack social and economic resources and may have no place to go to escape the abuse. In such cases, shelters are identified as places of safety, providing accommodation and psychosocial support to women and children who have escaped domestic violence. The aim of the study was to explore and understand the experiences of women who have suffered abuse, lived in a shelter for survivors of domestic violence and have then transitioned from life at the shelter back to independent living. Independence is defined as “the freedom to organize your own life, make your own decisions” (Hornby, 2015b) and independent living is a concept of leaving the shelter to live in the community. A phenomenological research design was adopted, with the sample of the study consisting of eight women who had resided at a shelter and three staff members from shelters for domestic violence in the Eastern Cape. Interpretive phenomenological analysis (IPA) was adopted to analyse the data that was collected from the participants during semi-structured interviews. The study found that the reasons women seek help at a shelter include the severity of the abuse, the gravity of the impact of the abuse upon their own wellbeing, the fact that the abuse is accompanied by substance abuse, and also because the children are exposed and experience the abuse. The study also found that in addition to resources such as government services and civil society organisations, the shelters themselves are most supportive to women as they leave the shelter and transition back to independent living. Lastly, the study highlighted that the challenges women face as they transition to independent living were the lack of support and the lack of social and economic resources. Recommendations based on the findings of the study are to advocate to stop domestic violence, to collaborate with various departments to combat domestic violence and lastly to fund shelters and ensure the shelter staff are adequately trained to work with survivors of domestic violence.
- Full Text:
- Date Issued: 2018
- Authors: Moonieyan, Chrislynn
- Date: 2018
- Subjects: Family violence Shelters for the homeless Homeless persons
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/12939 , vital:39407
- Description: Domestic violence is a devastating social ill in South Africa and especially in the Eastern Cape. There were 12059 cases of domestic violence reported at police stations in the Eastern Cape between 2015 and 2017 (Dayimani, 2017). Domestic violence is broadly defined as any act of abuse resulting in harm or suffering experienced by women enacted by an intimate partner (Goosen & Shaik, 2008). One in four women experience physical violence in their lifetime (Rasool, 2015). Women who experience domestic violence often lack social and economic resources and may have no place to go to escape the abuse. In such cases, shelters are identified as places of safety, providing accommodation and psychosocial support to women and children who have escaped domestic violence. The aim of the study was to explore and understand the experiences of women who have suffered abuse, lived in a shelter for survivors of domestic violence and have then transitioned from life at the shelter back to independent living. Independence is defined as “the freedom to organize your own life, make your own decisions” (Hornby, 2015b) and independent living is a concept of leaving the shelter to live in the community. A phenomenological research design was adopted, with the sample of the study consisting of eight women who had resided at a shelter and three staff members from shelters for domestic violence in the Eastern Cape. Interpretive phenomenological analysis (IPA) was adopted to analyse the data that was collected from the participants during semi-structured interviews. The study found that the reasons women seek help at a shelter include the severity of the abuse, the gravity of the impact of the abuse upon their own wellbeing, the fact that the abuse is accompanied by substance abuse, and also because the children are exposed and experience the abuse. The study also found that in addition to resources such as government services and civil society organisations, the shelters themselves are most supportive to women as they leave the shelter and transition back to independent living. Lastly, the study highlighted that the challenges women face as they transition to independent living were the lack of support and the lack of social and economic resources. Recommendations based on the findings of the study are to advocate to stop domestic violence, to collaborate with various departments to combat domestic violence and lastly to fund shelters and ensure the shelter staff are adequately trained to work with survivors of domestic violence.
- Full Text:
- Date Issued: 2018
Vulcanus and Fynbos portfolio orchestral ballet and a chamber work for SSATBarB and two guitars
- Authors: Kinsey, Avril
- Date: 2018
- Subjects: Orchestral music, Arranged -- Parts , Ballets Orchestral music
- Language: English
- Type: Thesis , Doctoral , DMus
- Identifier: http://hdl.handle.net/10948/31349 , vital:31355
- Description: This DMus composition degree is a portfolio (c. 93 minutes) that focuses on creative work with an extensive text in music notation, which embodies the composer’s creative research. The portfolio comprises two large-scale tonal and extended tonal works inspired by nature and informed by a narrative aesthetic. The two scores include an orchestral ballet in two acts and four scenes, Vulcanus (c. 54 minutes), which was created from a scenario by the composer, and which includes the occasional use of guitar and soprano, and a chamber work for SSATBarB and two guitars in nine movements entitled the Fynbos Suite (c. 39 minutes), inspired by the eco-system fynbos oil paintings of Steven Felmore. Both works can be seen as contributing respectively to the discipline of mainstream orchestral works, and guitar and choral writing. The accompanying commentary on the portfolio provides a rationale for the compositions, and outlines some of the creative processes and inspirational influences behind the works. An overview of the musical forms contextualizes the works within their narrative and visual frameworks. The ballet notes discuss the rationale for choosing ballet and include cultural, musical and extra-musical influences. A detailed scenario of the story with a description of the ballet’s characters and corps de ballet follows, while a table lists the dances and narrative mimetic episodes with tempos and time codes suitable for a choreographer to work from. The Fynbos Suite commentary gives some insight into fynbos within nature, and within the context of the paintings and the musical style. Included in the notes are the composer’s lyrics to four songs, and with the kind permission of the artist, the reproduction of the nine inspirational paintings. The recordings of Vulcanus and the Fynbos Suite were realised from the sound files of the Sibelius notation program. The guitar and the orchestral sounds, as well as the voice in Vulcanus are sampled from the Yamaha DGX 620 library, while the four vocal works of the Fynbos Suite were recorded with the Cape Soloists at the Fismer Hall, Stellenbosch University. The guitar in ‘Light on the Edge of Hope’ and the ‘Glory of Nature’ were performed by the composer. In conclusion to the background notes the creative journey, planned and unplanned, is reflected on, highlighting musical imagination with creative serendipity, and what the experiences of the process and outcome mean to the composer.
- Full Text:
- Date Issued: 2018
- Authors: Kinsey, Avril
- Date: 2018
- Subjects: Orchestral music, Arranged -- Parts , Ballets Orchestral music
- Language: English
- Type: Thesis , Doctoral , DMus
- Identifier: http://hdl.handle.net/10948/31349 , vital:31355
- Description: This DMus composition degree is a portfolio (c. 93 minutes) that focuses on creative work with an extensive text in music notation, which embodies the composer’s creative research. The portfolio comprises two large-scale tonal and extended tonal works inspired by nature and informed by a narrative aesthetic. The two scores include an orchestral ballet in two acts and four scenes, Vulcanus (c. 54 minutes), which was created from a scenario by the composer, and which includes the occasional use of guitar and soprano, and a chamber work for SSATBarB and two guitars in nine movements entitled the Fynbos Suite (c. 39 minutes), inspired by the eco-system fynbos oil paintings of Steven Felmore. Both works can be seen as contributing respectively to the discipline of mainstream orchestral works, and guitar and choral writing. The accompanying commentary on the portfolio provides a rationale for the compositions, and outlines some of the creative processes and inspirational influences behind the works. An overview of the musical forms contextualizes the works within their narrative and visual frameworks. The ballet notes discuss the rationale for choosing ballet and include cultural, musical and extra-musical influences. A detailed scenario of the story with a description of the ballet’s characters and corps de ballet follows, while a table lists the dances and narrative mimetic episodes with tempos and time codes suitable for a choreographer to work from. The Fynbos Suite commentary gives some insight into fynbos within nature, and within the context of the paintings and the musical style. Included in the notes are the composer’s lyrics to four songs, and with the kind permission of the artist, the reproduction of the nine inspirational paintings. The recordings of Vulcanus and the Fynbos Suite were realised from the sound files of the Sibelius notation program. The guitar and the orchestral sounds, as well as the voice in Vulcanus are sampled from the Yamaha DGX 620 library, while the four vocal works of the Fynbos Suite were recorded with the Cape Soloists at the Fismer Hall, Stellenbosch University. The guitar in ‘Light on the Edge of Hope’ and the ‘Glory of Nature’ were performed by the composer. In conclusion to the background notes the creative journey, planned and unplanned, is reflected on, highlighting musical imagination with creative serendipity, and what the experiences of the process and outcome mean to the composer.
- Full Text:
- Date Issued: 2018
Vulcanus and Fynbos portfolio Orchestral ballet and a chamber work for SSATBarB and two guitars
- Authors: Kinsey, Avril
- Date: 2018
- Subjects: Orchestral music -- Scores , Ballets
- Language: English
- Type: Thesis , Doctoral , DMus
- Identifier: http://hdl.handle.net/10948/31323 , vital:31364
- Description: This DMus composition degree is a portfolio (c. 93 minutes) that focuses on creative work with an extensive text in music notation, which embodies the composer’s creative research. The portfolio comprises two large-scale tonal and extended tonal works inspired by nature and informed by a narrative aesthetic. The two scores include an orchestral ballet in two acts and four scenes, Vulcanus (c. 54 minutes), which was created from a scenario by the composer, and which includes the occasional use of guitar and soprano, and a chamber work for SSATBarB and two guitars in nine movements entitled the Fynbos Suite (c. 39 minutes), inspired by the eco-system fynbos oil paintings of Steven Felmore. Both works can be seen as contributing respectively to the discipline of mainstream orchestral works, and guitar and choral writing. The accompanying commentary on the portfolio provides a rationale for the compositions, and outlines some of the creative processes and inspirational influences behind the works. An overview of the musical forms contextualizes the works within their narrative and visual frameworks. The ballet notes discuss the rationale for choosing ballet and include cultural, musical and extramusical influences. A detailed scenario of the story with a description of the ballet’s characters and corps de ballet follows, while a table lists the dances and narrative mimetic episodes with tempos and time codes suitable for a choreographer to work from. The Fynbos Suite commentary gives some insight into fynbos within nature, and within the context of the paintings and the musical style. Included in the notes are the composer’s lyrics to four songs, and with the kind permission of the artist, the reproduction of the nine inspirational paintings. The recordings of Vulcanus and the Fynbos Suite were realised from the sound files of the Sibelius notation program. The guitar and the orchestral sounds, as well as the voice in Vulcanus are sampled from the Yamaha DGX 620 library, while the four vocal works of the Fynbos Suite were recorded with the Cape Soloists at the Fismer Hall, Stellenbosch University. The guitar in ‘Light on the Edge of Hope’ and the ‘Glory of Nature’ were performed by the composer. In conclusion to the background notes the creative journey, planned and unplanned, is reflected on, highlighting musical imagination with creative serendipity, and what the experiences of the process and outcome mean to the composer.
- Full Text:
- Date Issued: 2018
- Authors: Kinsey, Avril
- Date: 2018
- Subjects: Orchestral music -- Scores , Ballets
- Language: English
- Type: Thesis , Doctoral , DMus
- Identifier: http://hdl.handle.net/10948/31323 , vital:31364
- Description: This DMus composition degree is a portfolio (c. 93 minutes) that focuses on creative work with an extensive text in music notation, which embodies the composer’s creative research. The portfolio comprises two large-scale tonal and extended tonal works inspired by nature and informed by a narrative aesthetic. The two scores include an orchestral ballet in two acts and four scenes, Vulcanus (c. 54 minutes), which was created from a scenario by the composer, and which includes the occasional use of guitar and soprano, and a chamber work for SSATBarB and two guitars in nine movements entitled the Fynbos Suite (c. 39 minutes), inspired by the eco-system fynbos oil paintings of Steven Felmore. Both works can be seen as contributing respectively to the discipline of mainstream orchestral works, and guitar and choral writing. The accompanying commentary on the portfolio provides a rationale for the compositions, and outlines some of the creative processes and inspirational influences behind the works. An overview of the musical forms contextualizes the works within their narrative and visual frameworks. The ballet notes discuss the rationale for choosing ballet and include cultural, musical and extramusical influences. A detailed scenario of the story with a description of the ballet’s characters and corps de ballet follows, while a table lists the dances and narrative mimetic episodes with tempos and time codes suitable for a choreographer to work from. The Fynbos Suite commentary gives some insight into fynbos within nature, and within the context of the paintings and the musical style. Included in the notes are the composer’s lyrics to four songs, and with the kind permission of the artist, the reproduction of the nine inspirational paintings. The recordings of Vulcanus and the Fynbos Suite were realised from the sound files of the Sibelius notation program. The guitar and the orchestral sounds, as well as the voice in Vulcanus are sampled from the Yamaha DGX 620 library, while the four vocal works of the Fynbos Suite were recorded with the Cape Soloists at the Fismer Hall, Stellenbosch University. The guitar in ‘Light on the Edge of Hope’ and the ‘Glory of Nature’ were performed by the composer. In conclusion to the background notes the creative journey, planned and unplanned, is reflected on, highlighting musical imagination with creative serendipity, and what the experiences of the process and outcome mean to the composer.
- Full Text:
- Date Issued: 2018
Vulnerabilities of Coastal Tourism destinations to climate change related incidents: a case study selected holiday resorts along the wildcoast, Eastern Cape, South Africa
- Authors: Van Der Byl, Athina
- Date: 2018
- Subjects: Coastal Tourism destinations -- Wildcoast Wildcoast -- Holiday resorts -- South Africa -- Eastern Cape Climate change -- Tourism
- Language: English
- Type: Thesis , Masters , M Sc
- Identifier: http://hdl.handle.net/11260/1337 , vital:32259
- Description: Climate change is a global phenomenon with major impacts on coastlines, leaving coastal areas vulnerable to conditions such as sea level rise, flooding as well as storm surges, which results in increased damage to or loss of coastal property and infrastructure. The study examined the vulnerability of the Eastern Cape’s Wild Coast resorts to climate change related impacts. Both qualitative and quantitative methods aided by questionnaires and GIS mapping were used to identify vulnerable settlements as well as their impacts. A meta analysis of the identified vulnerabilities was studied and strategies employed to reduce the impacts was also done. Results indicated that almost 80% of the Wild Coast resorts occur within the low-lying areas of the coast and these areas were mostly affected by impacts such as sea level rise, heavy rainfall and floods accompanied by storm surges. Another alarming challenge faced by the King Sabata Dalindyebo Municipality was controlling unplanned developments within these low-lying zones of the coast. Therefore, it is recommended that relevant departments provide awareness through various platforms such as workshops, programmes and campaigns to ensure that people understand the risk of climate change on low-lying areas as well as mainstreaming climate change in long term development planning. This study highlights a need for monitoring of coastal environments vulnerable to the impact of climate change along a South African coastline.
- Full Text:
- Date Issued: 2018
- Authors: Van Der Byl, Athina
- Date: 2018
- Subjects: Coastal Tourism destinations -- Wildcoast Wildcoast -- Holiday resorts -- South Africa -- Eastern Cape Climate change -- Tourism
- Language: English
- Type: Thesis , Masters , M Sc
- Identifier: http://hdl.handle.net/11260/1337 , vital:32259
- Description: Climate change is a global phenomenon with major impacts on coastlines, leaving coastal areas vulnerable to conditions such as sea level rise, flooding as well as storm surges, which results in increased damage to or loss of coastal property and infrastructure. The study examined the vulnerability of the Eastern Cape’s Wild Coast resorts to climate change related impacts. Both qualitative and quantitative methods aided by questionnaires and GIS mapping were used to identify vulnerable settlements as well as their impacts. A meta analysis of the identified vulnerabilities was studied and strategies employed to reduce the impacts was also done. Results indicated that almost 80% of the Wild Coast resorts occur within the low-lying areas of the coast and these areas were mostly affected by impacts such as sea level rise, heavy rainfall and floods accompanied by storm surges. Another alarming challenge faced by the King Sabata Dalindyebo Municipality was controlling unplanned developments within these low-lying zones of the coast. Therefore, it is recommended that relevant departments provide awareness through various platforms such as workshops, programmes and campaigns to ensure that people understand the risk of climate change on low-lying areas as well as mainstreaming climate change in long term development planning. This study highlights a need for monitoring of coastal environments vulnerable to the impact of climate change along a South African coastline.
- Full Text:
- Date Issued: 2018
Vulnerability and coping strategies of the Missionvale informal settlement community to flood hazards
- Authors: Tele, Asanda
- Date: 2018
- Subjects: Squatter settlements -- South Africa -- Port Elizabeth , Urbanization -- South Africa Floods -- Health aspects Floods -- Economic aspects Floods -- South Africa -- Port Elizabeth Emergency management -- South Africa -- Port Elizabeth -- Planning
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/35796 , vital:33848
- Description: While many governments and organisations across the globe have programmes in place to control flood disasters, the challenges, unpreparedness and vulnerability to flooding in many parts of the world persist. This study used the low-lying area of Missionvale township in Nelson Mandela Bay, Eastern Cape, South Africa as a case study to investigate the extent of the vulnerability of informal settlement dwellers to flooding, and to understand how the community deals with and recovers from severe flood disasters. The study adopted both quantitative and qualitative research methodologies. The empirical data for the study was obtained through a survey of 90 residents of the area, as well as interviews with the members of the community. Fieldwork and observations were also conducted. These focused on examining the area in terms of disaster relief. Secondary data was obtained through a literature review as well as a review of legislative frameworks. The findings indicate that since 1994, the government has put in place a disaster management system but the system still needs to be reinforced as periodic severe flooding continues to destroy properties and infrastructure in many communities. Crime as well as the emergence of water-borne diseases are negative spin-offs of these disasters. The research elaborates on the coping strategies of the community to floods and makes recommendations on vulnerability and coping strategies to floods in low-income settlements in South Africa. With climate change likely to aggravate flood disasters, it is recommended that the policy directions need stakeholders to improve disaster preparedness, provide flood measures to houses and storm water drainage, develop early warning systems and improve community participation in disaster preparedness planning and efforts. In addition, it is crucial to improve post-disaster responses such as service delivery and support for the flood victims with needed resources and rebuilding of homes and lives.
- Full Text:
- Date Issued: 2018
- Authors: Tele, Asanda
- Date: 2018
- Subjects: Squatter settlements -- South Africa -- Port Elizabeth , Urbanization -- South Africa Floods -- Health aspects Floods -- Economic aspects Floods -- South Africa -- Port Elizabeth Emergency management -- South Africa -- Port Elizabeth -- Planning
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/35796 , vital:33848
- Description: While many governments and organisations across the globe have programmes in place to control flood disasters, the challenges, unpreparedness and vulnerability to flooding in many parts of the world persist. This study used the low-lying area of Missionvale township in Nelson Mandela Bay, Eastern Cape, South Africa as a case study to investigate the extent of the vulnerability of informal settlement dwellers to flooding, and to understand how the community deals with and recovers from severe flood disasters. The study adopted both quantitative and qualitative research methodologies. The empirical data for the study was obtained through a survey of 90 residents of the area, as well as interviews with the members of the community. Fieldwork and observations were also conducted. These focused on examining the area in terms of disaster relief. Secondary data was obtained through a literature review as well as a review of legislative frameworks. The findings indicate that since 1994, the government has put in place a disaster management system but the system still needs to be reinforced as periodic severe flooding continues to destroy properties and infrastructure in many communities. Crime as well as the emergence of water-borne diseases are negative spin-offs of these disasters. The research elaborates on the coping strategies of the community to floods and makes recommendations on vulnerability and coping strategies to floods in low-income settlements in South Africa. With climate change likely to aggravate flood disasters, it is recommended that the policy directions need stakeholders to improve disaster preparedness, provide flood measures to houses and storm water drainage, develop early warning systems and improve community participation in disaster preparedness planning and efforts. In addition, it is crucial to improve post-disaster responses such as service delivery and support for the flood victims with needed resources and rebuilding of homes and lives.
- Full Text:
- Date Issued: 2018
Wagon bridges of the Eastern Cape, c. 1840 – 1900: the contribution of engineering to infrastructural development
- Authors: Walters, Dennis Evelyn
- Date: 2018
- Subjects: Bridges Design and construction 19th century , Civil engineers South Africa Cape of Good Hope , Great Britain. Crown Agents' Office , Public works Great Britain Colonies , Wagon trains South Africa Cape of Good Hope
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63877 , vital:28500
- Description: This thesis examines an aspect of economic and technological history which has been little explored in South African history. It argues that the military subjugation and the economic development of the Cape Colony, and particularly of the Eastern Cape, were contingent upon good transportation. The geography of the country, which included relatively impassable mountains and numerous often flooded rivers, necessitated bridges as well as roads. Both were expensive. As a leader in industrial technology, Britain was well placed to extend bridge-building skills to its colonies. This thesis examines the processes by which a small and undeveloped colony strove to create an efficient technological infrastructure. As wagon traffic increased through progress, delays in crossing rivers became a hindrance leading to agitation for bridges. It will be shown that the construction of wagon bridges over the numerous rivers encountered in the Eastern Cape Colony was imperative for the initial free flow of military forces and for later commercial expansion as new towns were established. The eastward expansion was led by the military during the frontier wars followed by the Royal Engineers who built roads and bridges along the eastern frontier. The new Colonial Secretary John Montagu, who arrived in 1843, boosted the colonial finances by overhauling the administration. He established the Central Road Board, an organisation that would drive the building of mountain passes, roads and bridges. The Public Works Department succeeded the Central Road Board and with the financial intervention of the Crown Agents for the Colonies, carried on with an extensive programme of road and bridge building. From the 1870s wagon bridge building lagged behind the huge railway building enterprise in response to the opening up of the diamond and gold mines. The final quarter of the 19th century saw increased bridge building activity in the Eastern Cape with the construction of many iron lattice girder, stone masonry arch and timber trestle bridges. The surviving bridges remain as mute testimony to the skill and expertise of British engineers such as Lewis, Woodifield, Robinson, Fforde, Wakefield, Berkley, Grier, Newey, Westhoven and others.
- Full Text:
- Date Issued: 2018
- Authors: Walters, Dennis Evelyn
- Date: 2018
- Subjects: Bridges Design and construction 19th century , Civil engineers South Africa Cape of Good Hope , Great Britain. Crown Agents' Office , Public works Great Britain Colonies , Wagon trains South Africa Cape of Good Hope
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63877 , vital:28500
- Description: This thesis examines an aspect of economic and technological history which has been little explored in South African history. It argues that the military subjugation and the economic development of the Cape Colony, and particularly of the Eastern Cape, were contingent upon good transportation. The geography of the country, which included relatively impassable mountains and numerous often flooded rivers, necessitated bridges as well as roads. Both were expensive. As a leader in industrial technology, Britain was well placed to extend bridge-building skills to its colonies. This thesis examines the processes by which a small and undeveloped colony strove to create an efficient technological infrastructure. As wagon traffic increased through progress, delays in crossing rivers became a hindrance leading to agitation for bridges. It will be shown that the construction of wagon bridges over the numerous rivers encountered in the Eastern Cape Colony was imperative for the initial free flow of military forces and for later commercial expansion as new towns were established. The eastward expansion was led by the military during the frontier wars followed by the Royal Engineers who built roads and bridges along the eastern frontier. The new Colonial Secretary John Montagu, who arrived in 1843, boosted the colonial finances by overhauling the administration. He established the Central Road Board, an organisation that would drive the building of mountain passes, roads and bridges. The Public Works Department succeeded the Central Road Board and with the financial intervention of the Crown Agents for the Colonies, carried on with an extensive programme of road and bridge building. From the 1870s wagon bridge building lagged behind the huge railway building enterprise in response to the opening up of the diamond and gold mines. The final quarter of the 19th century saw increased bridge building activity in the Eastern Cape with the construction of many iron lattice girder, stone masonry arch and timber trestle bridges. The surviving bridges remain as mute testimony to the skill and expertise of British engineers such as Lewis, Woodifield, Robinson, Fforde, Wakefield, Berkley, Grier, Newey, Westhoven and others.
- Full Text:
- Date Issued: 2018
Waste management knowledge, its production, recontextualisation and circulation in Expanded Public Works Programme (EPWP) training programmes
- Authors: Giqwa, Nomfundiso Louisa
- Date: 2018
- Subjects: Refuse and refuse disposal -- South Africa -- Eastern Cape , South Africa. Expanded Public Works Programme , Refuse and refuse disposal -- Employees -- Training of -- South Africa -- Eastern Cape , South Africa. Department of Environmental Affairs , Knowledge, Theory of , Knowledge, Sociology of
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63729 , vital:28478
- Description: This study set out to investigate the structuring, recontextualisation and circulation of waste management knowledge in the South African environmental Expanded Public Works Programme (EPWP) Waste Management Projects. In this thesis these projects also referred to as the Working on Waste (WoW) programme or focus area within the Environmental Protection and Infrastructure Programme (EPIP) hosted by the National Department of Environmental Affairs. Expanded Public Work Programmes are a strategy used by governments to address unemployment and in South Africa; the programmes also seek to address a need for skills development. In this study, the focus is on EPWP waste management knowledge, training programmes and activities only. With waste management knowledge as the core interest, the focus of the investigation was on knowledge circulation of waste management via informal (participation in the project) and formal training of workers at Level 2 National Qualifications Framework (NQF). The study started by firstly investigating what waste management knowledge is produced in the Field of Production via scientific research and policy. It then studied how this waste management knowledge is recontextualised into qualifications and skills programmes designed in the official recontextualising field and learning materials and training programmes designed and offered in the professional recontextualising field. The study also focused on the knowledge of workers and their experience of training in the EPWP workplaces, with an emphasis on rural workplaces. This is where the Department of Environmental Affairs (DEA) is placing emphasis on training for job creation, empowerment and skills development, and it is also where a number of EPWP Working on Waste programmes are being implemented. The aim was also to develop an understanding of how knowledge circulates amongst learners in training sessions and in workplaces. To do this, I drew on Bernstein’s theory of the pedagogical device which provides theoretical lenses and a language of description to explain how knowledge is recontextualised from the field of production to the field of reproduction. To investigate the structuring of this knowledge by official and pedagogical recontextualisers, I drew on the work of Maton, who offers a Legitimation Code Theory to explain the principles structuring knowledge, of which I used specialisation and semantics (two of his suite of knowledge structuring principles) for analysis. The questions that guided the study throughout were: 1. What is the structure of legitimate knowledge and knowers in waste management? 2. What are the underlying principles underpinning knowledge and knowers in waste management? 3. How is the knowledge recontextualised in waste management training qualifications, documents and manuals for worker training at NQF Level 2? 4. How is the knowledge reproduced and evaluated in the waste management EPWP training activities (formal) and workplaces (informal)? 5. How does waste management knowledge circulate amongst the workers in the EPWP training activities and workplaces? For this study I used the case study method, focusing only on one field or DEA EPWP focus area (waste management) and one programme (EPWP Working on Waste), looking in more depth at two cases (two similar types of projects) within the EPWP Working on Waste programme, though they are situated in different areas and though I could only carry through observations of actual workplace training in one of the two sites due to contextual circumstances. The first project was situated in the Amathole District Municipality while the second one was situated in the Chris Hani District Municipality, both of which are in the rural towns of the former Transkei region in the Eastern Cape, South Africa. This area has been at the forefront in accessing funding for these projects due to the level of poverty surrounding these towns and the inability of the local government sphere to deliver on its mandate in the region. Data was collected through document analysis, questionnaires, interviews and observations. Documents analysed were research documents produced by researchers at the level of production as well as legal frameworks guiding waste management processes in this country. Qualifications and Unit Standards at Level 2, as well as training materials designed by providers were analysed. Training in one of the projects was observed and workers in both sites were interviewed twice. The main finding of the study is that waste management knowledge is characterised by interdisciplinarity and a strong epistemic relation which emphasises procedural and technical forms of knowledge. The study found that the knowledge constructed in the field, as well as the policies, qualifications and training programmes are all consequently characterised by a strong epistemic code (ER+) and a weak social relations code (SR-). The study also identified a ‘code clash’ with the knowledge of workers in rural towns whose knowledge and experience of waste management was found to reflect a strong social relation (SR+) and weak epistemic code (ER-), a pattern which was traced back to a similar code in waste management knowledge at home and school (i.e. workers’ prior knowledge and learning experiences). This created difficulties for the trainers who sought to use strategies of descending from the abstract to the concrete in various ‘descending’ semantic waves that tended to move from high levels of semantic density (SD+) to lower levels of semantic density (SD-) as the training provider sought to contextualise a range of concepts. This was the main strategy identified for mediating waste management knowledge reflecting a dominant pattern of SD+/SG- to SD-/SG+ (with SG meaning semantic gravity). This shows that the trainer seldom started mediating concepts from the basis of workers’ prior knowledge and experience and observations showed little responsiveness from workers resulting from this strategy. Despite this, the study found that workers did develop an improved understanding of specialised waste management knowledge over time, especially through observing and doing more complex tasks in the workplace. The study offers a model for addressing the pedagogical difficulty identified around the code clash, and suggests that further attention needs to be given to ‘ascending’ from the concrete to the abstract in pedagogical practices. The study also pointed to the need for a more inclusive knowledge framework for waste management training, especially in the field of recontextualisation (both the official and pedagogical recontextualisation fields) to extend possibilities for workers to learn more about economic potential and access routes into more sustainable jobs. It identifies the need for a more systemic approach to waste management in rural towns and municipalities, improved compliance and also proposes that better waste management practices are modelled to avoid performative contradictions between the knowledge promoted in the field of production and the official and pedagogical recontextualising fields and the field of reproduction, where workers are learning this knowledge via a mix of accredited training and exposure to participation in waste management practices. This study contributes to new knowledge in that it offers an epistemically grounded and theorised pedagogical process model for Level 2 Waste Management Training (in the EPWP programmes, but potentially also more broadly) that accords with the need for a strong epistemic relation code (ER+) embodied in the need for learning scientific and technical waste management knowledge and procedures. It also addresses workers’ needs for greater epistemic access and participation in knowledge building and application of waste management knowledge in praxis as per the purpose of the EPW training programmes, thereby potentially opening up more sustainable learning pathways for them out of poverty through the EPWP training opportunities. The study has pointed to key areas for further research, including further research on the proposed model, further research into Level 2 pedagogical practices and further research into the foundations of waste management learning in schools. Most of the workers who were participating in the training in the EPWP programmes were educated at above Level 2 before participating in the projects, yet their knowledge and experience of waste management was mostly based on everyday knowledge, pointing to an absence of adequate waste management education in schools in rural contexts in South Africa. The study has also made various recommendations for improving waste management education and training at Level 2 in EPWP programmes in rural areas in particular (but potentially also more widely), notably the need to develop a more inclusive knowledge framework that includes historical and economic knowledge more explicitly at all levels of the recontextualisation process; improved pedagogical and assessment practices that take better account of learners knowledge and experiences in knowledge building processes; and giving attention to structural and systemic approaches to waste management in rural areas to avoid performative contradictions that arise between the knowledge being promoted in the field of production and the field of reproduction and the actual context of waste management.
- Full Text:
- Date Issued: 2018
- Authors: Giqwa, Nomfundiso Louisa
- Date: 2018
- Subjects: Refuse and refuse disposal -- South Africa -- Eastern Cape , South Africa. Expanded Public Works Programme , Refuse and refuse disposal -- Employees -- Training of -- South Africa -- Eastern Cape , South Africa. Department of Environmental Affairs , Knowledge, Theory of , Knowledge, Sociology of
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63729 , vital:28478
- Description: This study set out to investigate the structuring, recontextualisation and circulation of waste management knowledge in the South African environmental Expanded Public Works Programme (EPWP) Waste Management Projects. In this thesis these projects also referred to as the Working on Waste (WoW) programme or focus area within the Environmental Protection and Infrastructure Programme (EPIP) hosted by the National Department of Environmental Affairs. Expanded Public Work Programmes are a strategy used by governments to address unemployment and in South Africa; the programmes also seek to address a need for skills development. In this study, the focus is on EPWP waste management knowledge, training programmes and activities only. With waste management knowledge as the core interest, the focus of the investigation was on knowledge circulation of waste management via informal (participation in the project) and formal training of workers at Level 2 National Qualifications Framework (NQF). The study started by firstly investigating what waste management knowledge is produced in the Field of Production via scientific research and policy. It then studied how this waste management knowledge is recontextualised into qualifications and skills programmes designed in the official recontextualising field and learning materials and training programmes designed and offered in the professional recontextualising field. The study also focused on the knowledge of workers and their experience of training in the EPWP workplaces, with an emphasis on rural workplaces. This is where the Department of Environmental Affairs (DEA) is placing emphasis on training for job creation, empowerment and skills development, and it is also where a number of EPWP Working on Waste programmes are being implemented. The aim was also to develop an understanding of how knowledge circulates amongst learners in training sessions and in workplaces. To do this, I drew on Bernstein’s theory of the pedagogical device which provides theoretical lenses and a language of description to explain how knowledge is recontextualised from the field of production to the field of reproduction. To investigate the structuring of this knowledge by official and pedagogical recontextualisers, I drew on the work of Maton, who offers a Legitimation Code Theory to explain the principles structuring knowledge, of which I used specialisation and semantics (two of his suite of knowledge structuring principles) for analysis. The questions that guided the study throughout were: 1. What is the structure of legitimate knowledge and knowers in waste management? 2. What are the underlying principles underpinning knowledge and knowers in waste management? 3. How is the knowledge recontextualised in waste management training qualifications, documents and manuals for worker training at NQF Level 2? 4. How is the knowledge reproduced and evaluated in the waste management EPWP training activities (formal) and workplaces (informal)? 5. How does waste management knowledge circulate amongst the workers in the EPWP training activities and workplaces? For this study I used the case study method, focusing only on one field or DEA EPWP focus area (waste management) and one programme (EPWP Working on Waste), looking in more depth at two cases (two similar types of projects) within the EPWP Working on Waste programme, though they are situated in different areas and though I could only carry through observations of actual workplace training in one of the two sites due to contextual circumstances. The first project was situated in the Amathole District Municipality while the second one was situated in the Chris Hani District Municipality, both of which are in the rural towns of the former Transkei region in the Eastern Cape, South Africa. This area has been at the forefront in accessing funding for these projects due to the level of poverty surrounding these towns and the inability of the local government sphere to deliver on its mandate in the region. Data was collected through document analysis, questionnaires, interviews and observations. Documents analysed were research documents produced by researchers at the level of production as well as legal frameworks guiding waste management processes in this country. Qualifications and Unit Standards at Level 2, as well as training materials designed by providers were analysed. Training in one of the projects was observed and workers in both sites were interviewed twice. The main finding of the study is that waste management knowledge is characterised by interdisciplinarity and a strong epistemic relation which emphasises procedural and technical forms of knowledge. The study found that the knowledge constructed in the field, as well as the policies, qualifications and training programmes are all consequently characterised by a strong epistemic code (ER+) and a weak social relations code (SR-). The study also identified a ‘code clash’ with the knowledge of workers in rural towns whose knowledge and experience of waste management was found to reflect a strong social relation (SR+) and weak epistemic code (ER-), a pattern which was traced back to a similar code in waste management knowledge at home and school (i.e. workers’ prior knowledge and learning experiences). This created difficulties for the trainers who sought to use strategies of descending from the abstract to the concrete in various ‘descending’ semantic waves that tended to move from high levels of semantic density (SD+) to lower levels of semantic density (SD-) as the training provider sought to contextualise a range of concepts. This was the main strategy identified for mediating waste management knowledge reflecting a dominant pattern of SD+/SG- to SD-/SG+ (with SG meaning semantic gravity). This shows that the trainer seldom started mediating concepts from the basis of workers’ prior knowledge and experience and observations showed little responsiveness from workers resulting from this strategy. Despite this, the study found that workers did develop an improved understanding of specialised waste management knowledge over time, especially through observing and doing more complex tasks in the workplace. The study offers a model for addressing the pedagogical difficulty identified around the code clash, and suggests that further attention needs to be given to ‘ascending’ from the concrete to the abstract in pedagogical practices. The study also pointed to the need for a more inclusive knowledge framework for waste management training, especially in the field of recontextualisation (both the official and pedagogical recontextualisation fields) to extend possibilities for workers to learn more about economic potential and access routes into more sustainable jobs. It identifies the need for a more systemic approach to waste management in rural towns and municipalities, improved compliance and also proposes that better waste management practices are modelled to avoid performative contradictions between the knowledge promoted in the field of production and the official and pedagogical recontextualising fields and the field of reproduction, where workers are learning this knowledge via a mix of accredited training and exposure to participation in waste management practices. This study contributes to new knowledge in that it offers an epistemically grounded and theorised pedagogical process model for Level 2 Waste Management Training (in the EPWP programmes, but potentially also more broadly) that accords with the need for a strong epistemic relation code (ER+) embodied in the need for learning scientific and technical waste management knowledge and procedures. It also addresses workers’ needs for greater epistemic access and participation in knowledge building and application of waste management knowledge in praxis as per the purpose of the EPW training programmes, thereby potentially opening up more sustainable learning pathways for them out of poverty through the EPWP training opportunities. The study has pointed to key areas for further research, including further research on the proposed model, further research into Level 2 pedagogical practices and further research into the foundations of waste management learning in schools. Most of the workers who were participating in the training in the EPWP programmes were educated at above Level 2 before participating in the projects, yet their knowledge and experience of waste management was mostly based on everyday knowledge, pointing to an absence of adequate waste management education in schools in rural contexts in South Africa. The study has also made various recommendations for improving waste management education and training at Level 2 in EPWP programmes in rural areas in particular (but potentially also more widely), notably the need to develop a more inclusive knowledge framework that includes historical and economic knowledge more explicitly at all levels of the recontextualisation process; improved pedagogical and assessment practices that take better account of learners knowledge and experiences in knowledge building processes; and giving attention to structural and systemic approaches to waste management in rural areas to avoid performative contradictions that arise between the knowledge being promoted in the field of production and the field of reproduction and the actual context of waste management.
- Full Text:
- Date Issued: 2018
Water quality, biomass and extracellular polymeric substances in an integrated algae pond system
- Authors: Jimoh, Taobat Adekilekun
- Date: 2018
- Subjects: Water -- Purification , Sewage -- Purification -- Anaerobic treatment , Sewage lagoons , Sewage disposal plants , ASPAM model (Acid mine drainage) , Integrated algae pond systems (IAPS)
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/57307 , vital:26871
- Description: Integrated algae pond systems (IAPS) combine the use of anaerobic and aerobic bioprocesses to effect wastewater treatment. Although, IAPS as a technology process offers many advantages including efficient and simultaneous N and P removal, no requirement for additional chemicals, O2 generation, CO2 mitigation, and a biomass with potential for valorization, a lack of technological advancement and the need for large land area, has limited the reach of this technology at industrial scale. In mitigation, peroxonation was introduced as a tertiary treatment unit and its effect on COD and TSS of IAPS treated water investigated. An effort was made to characterize the soluble but persistent COD in IAPS treated water and, productivity of the HRAOP mixed liquor was investigated to gain insight into the potential use of this biomass. Results show that peroxone treatment effectively reduced COD, TSS, and nutrient load of IAPS water without any significant impact on land area requirement. Indeed, summary data describing the effect of peroxone on quality of IAPS-treated water confirmed that it complies with the general limit values for either irrigation or discharge into a water resource that is not a listed water resource for volumes up to 2 ML of treated wastewater on any given day. Extraction followed by FT-IR spectroscopy was used to confirm albeit tentatively, the identity of the soluble but persistent COD in IAPS treated water as MaB-floc EPS. Results show that MaB-flocs from HRAOPs are assemblages of microorganisms produced as discrete aggregates as a result of microbial EPS production. A relationship between photosynthesis and EPS production was established by quantification of the EPS following exposure of MaB-flocs to either continuous light or darkness. Several novel strains of bacteria were isolated from HRAOP mixed liquor and 16S ribosomal genomic sequence analysis resulted in the molecular characterization of Planococcus maitriensis strain ECCN 45b. This is the first report of Planococcus maitriensis from a wastewater treatment process. Productivity and change in MaB-flocs concentration, measured as mixed liquor suspended solids (MLSS) between morning and evening were monitored and revealed that MLSS is composed of microalgae and bacteria but not fungi. Concentration varied from 77 mg L-1 in September (winter) to 285 mg L-1 in November (spring); pond productivity increased from 5.8 g m-2 d-1 (winter) to 21.5 g m-2 d-1 (spring); and, irrespective of MLSS concentration in late afternoon, approximately 39% was lost overnight, which presumably occurred due to passive removal by the algae settling pond. The outcomes of this research are discussed in terms of the quality of treated water, and the further development of IAPS as a platform technology for establishing a biorefinery within the wastewater treatment sector.
- Full Text:
- Date Issued: 2018
- Authors: Jimoh, Taobat Adekilekun
- Date: 2018
- Subjects: Water -- Purification , Sewage -- Purification -- Anaerobic treatment , Sewage lagoons , Sewage disposal plants , ASPAM model (Acid mine drainage) , Integrated algae pond systems (IAPS)
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/57307 , vital:26871
- Description: Integrated algae pond systems (IAPS) combine the use of anaerobic and aerobic bioprocesses to effect wastewater treatment. Although, IAPS as a technology process offers many advantages including efficient and simultaneous N and P removal, no requirement for additional chemicals, O2 generation, CO2 mitigation, and a biomass with potential for valorization, a lack of technological advancement and the need for large land area, has limited the reach of this technology at industrial scale. In mitigation, peroxonation was introduced as a tertiary treatment unit and its effect on COD and TSS of IAPS treated water investigated. An effort was made to characterize the soluble but persistent COD in IAPS treated water and, productivity of the HRAOP mixed liquor was investigated to gain insight into the potential use of this biomass. Results show that peroxone treatment effectively reduced COD, TSS, and nutrient load of IAPS water without any significant impact on land area requirement. Indeed, summary data describing the effect of peroxone on quality of IAPS-treated water confirmed that it complies with the general limit values for either irrigation or discharge into a water resource that is not a listed water resource for volumes up to 2 ML of treated wastewater on any given day. Extraction followed by FT-IR spectroscopy was used to confirm albeit tentatively, the identity of the soluble but persistent COD in IAPS treated water as MaB-floc EPS. Results show that MaB-flocs from HRAOPs are assemblages of microorganisms produced as discrete aggregates as a result of microbial EPS production. A relationship between photosynthesis and EPS production was established by quantification of the EPS following exposure of MaB-flocs to either continuous light or darkness. Several novel strains of bacteria were isolated from HRAOP mixed liquor and 16S ribosomal genomic sequence analysis resulted in the molecular characterization of Planococcus maitriensis strain ECCN 45b. This is the first report of Planococcus maitriensis from a wastewater treatment process. Productivity and change in MaB-flocs concentration, measured as mixed liquor suspended solids (MLSS) between morning and evening were monitored and revealed that MLSS is composed of microalgae and bacteria but not fungi. Concentration varied from 77 mg L-1 in September (winter) to 285 mg L-1 in November (spring); pond productivity increased from 5.8 g m-2 d-1 (winter) to 21.5 g m-2 d-1 (spring); and, irrespective of MLSS concentration in late afternoon, approximately 39% was lost overnight, which presumably occurred due to passive removal by the algae settling pond. The outcomes of this research are discussed in terms of the quality of treated water, and the further development of IAPS as a platform technology for establishing a biorefinery within the wastewater treatment sector.
- Full Text:
- Date Issued: 2018
Water resources management and its impact on small scale farming :the case of Lesotho
- Authors: Malinga, Wayne
- Date: 2018
- Subjects: Water resources development -- Lesotho Water-supply -- Lesotho Farms, Small -- Lesotho
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/9089 , vital:34256
- Description: This study is premised on the assumption that empowering the small-scale farmers in securing property rights and enforcement of these rights are the prime movers of agricultural development. Logically, it follows that by empowering small-scale farmers and giving them access to resources such as credits, subsidies and extension services the state can play a mediating role in transforming the agricultural land scape in Lesotho. Unless farmers are empowered the water resources in Lesotho will continue to serve the interest of the rent-seeking elite. Given the nature of the issues under investigation, the mixed research methodology (the use of both qualitative and quantitative methods) was used as a method of inquiry in order to get a deeper understanding of the phenomenon of water resources management and its subsequent impact on small scale farming in the rural areas of Lesotho. Both methods played a complimentary role by capitalising on both their strengths and weaknesses so as to provide various dynamics and linkages between the two variables of water resources management and small scale farming. The material condition of small scale farmers is intrinsically associated with the active state mediation in agriculture. Yet, the adopted Integrated Water Resources Management (IWRM) approach is still to materialise. This thesis, thus, argues that there is a need for a more holistic integrated water resources management framework that is livelihoods based and re-emphasises the need for conserving the ecosystem. Therefore, implementing a more holistic integrated water resources management approach is critical and vital in improving agricultural production and subsequently the livelihoods of small scale farmers and households. Although this thesis used Lesotho as the case study, it is hoped that the findings may provide tentative answers for other Sub-Saharan countries on how to properly and efficiently manage water resources so as to boost agricultural production amongst small scale farmers in order to improve human conditions and promote sustainable development in the rural areas.
- Full Text:
- Date Issued: 2018
- Authors: Malinga, Wayne
- Date: 2018
- Subjects: Water resources development -- Lesotho Water-supply -- Lesotho Farms, Small -- Lesotho
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/9089 , vital:34256
- Description: This study is premised on the assumption that empowering the small-scale farmers in securing property rights and enforcement of these rights are the prime movers of agricultural development. Logically, it follows that by empowering small-scale farmers and giving them access to resources such as credits, subsidies and extension services the state can play a mediating role in transforming the agricultural land scape in Lesotho. Unless farmers are empowered the water resources in Lesotho will continue to serve the interest of the rent-seeking elite. Given the nature of the issues under investigation, the mixed research methodology (the use of both qualitative and quantitative methods) was used as a method of inquiry in order to get a deeper understanding of the phenomenon of water resources management and its subsequent impact on small scale farming in the rural areas of Lesotho. Both methods played a complimentary role by capitalising on both their strengths and weaknesses so as to provide various dynamics and linkages between the two variables of water resources management and small scale farming. The material condition of small scale farmers is intrinsically associated with the active state mediation in agriculture. Yet, the adopted Integrated Water Resources Management (IWRM) approach is still to materialise. This thesis, thus, argues that there is a need for a more holistic integrated water resources management framework that is livelihoods based and re-emphasises the need for conserving the ecosystem. Therefore, implementing a more holistic integrated water resources management approach is critical and vital in improving agricultural production and subsequently the livelihoods of small scale farmers and households. Although this thesis used Lesotho as the case study, it is hoped that the findings may provide tentative answers for other Sub-Saharan countries on how to properly and efficiently manage water resources so as to boost agricultural production amongst small scale farmers in order to improve human conditions and promote sustainable development in the rural areas.
- Full Text:
- Date Issued: 2018
Weight gain in hospitalised low birth weight (LBW) premature infants receiving breast milk or breast milk with human milk fortifier in the Nelson Mandela Bay Health District
- Authors: Wicomb, Ra-eesa
- Date: 2018
- Subjects: Premature infants -- South Africa -- Nelson Mandela Bay Municipality , Birth weight, Low -- South Africa -- Nelson Mandela Bay Municipality Birth weight -- South Africa -- Nelson Mandela Bay Municipality Infants -- Nutrition Children -- Nutrition -- Research
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/23327 , vital:30529
- Description: Rationale: Worldwide, hospitals with premature units have one generalised objective, i.e. to achieve postnatal growth and body composition similar to that of a normal foetus of similar gestational age. Optimal nutrition leads to optimal neurodevelopment and breastfeeding (BF) is known as the golden standard for infant nutrition. Human breast milk (BM) has significant value for preterm and term infants and is of special benefit to HIV infected mothers. Maternal supplementation is provided as part of the standard protocol in certain hospitals in the Eastern Cape province to those mothers who breastfeed their low birth weight (LBW) infants after delivery. human milk fortifier (HMF) is a nutritional supplement that is added to expressed breast milk for feeding preterm infants in order to meet their high energy and protein needs and therefore supporting the recommended growth velocity of 10g/kg/day-15g/kg/day. Some hospitals within South Africa provide HMF to preterm infants as part of their standard nutritional protocol in order for the infant to gain weight if BM only failed to produce adequate results. To date, little to no South African studies support or discourage the use of HMF for LBW infants. This study aimed to describe the effect of maternal supplementation compared with breast milk with HMF, or a combination of maternal supplementation and breast milk with HMF, on growth velocity in hospitalised LBW premature infants within the Nelson Mandela Bay health district. The proposed study design followed a longitudinal, observational, descriptive study in a cohort of LBW infants. The study was analytical using quantitative empirical data. Study participants were selected, by using convenience sampling, at Dora Nginza Hospital, Zwide between October 2015 and August 2016 (ethics approval: EC_2016RP27_564). Quantitative data on anthropometric measurements was collected from study participants. Primary care givers provided written informed consent. Registered nurses were trained and performed anthropometrical measurements according to standardised methods. A structured questionnaire was completed by the principal reasarcher as a source of data collection. Numerical data was described using means and standard deviations. Chi squares were used to describe the associations between maternal risk factors and birth weight outcomes. ANOVA was used to determine the relationship between growth velocity and the various supplementation groups. A sample size of 91 LBW preterm infants and mother pairs were entered into this study. The majority of mothers, 64% (n=58) fell in the age category of 20-35 years old. Of the total maternal sample (n=88), 35% (n=31) were classified in the at risk age category, i.e. <20years old and >36years old. Out of the total infant sample (n=91), 65% (n=59) was classified as VLBW, 22% was LBW and 22% (n=20) was ELBW. No statistically significant association was found between infant growth velocity and maternal risk factors. The group receiving BM with HMF had a mean growth velocity of 19.75 g/kg/day (SD=6.45) that was statistically significantly (p<0.05) more than the other groups. The maternal supplementation only group and the maternal supplementation and BM fortification group showed mean growth velocities of 12.26 g/kg/day (SD=5.41) and 12.29 g/kg/day (SD=6.97) respectively. A post hoc test was done between growth velocity in the supplementated groups and the length of hospital stay. These results reveal that the group receiving BM with HMF had a significantly (p<0.05) shorter mean length of hospital stay of 11.29 days (SD=7.02), compared with the group on the combination of maternal supplementation and BM with HMF. In this study, infants receiving HMF with BM showed the highest growth velocity with the shortest hospital stay before discharge. In this group, infants were already receiving an adequate BM intake of 150-180 ml/kg/day prior to participation in the study. This meant that the HMF group consisted of more stable preterm infants compared to the rest of the supplementated groups. However, a large proportion of participants in the maternal supplementation group also showed adequate to good growth velocity. The researcher recommends the implementation of maternal supplementation only, as standard of care for all hospitalised lactating women. Furthermore, timeous addition of HMF to expressed BM is necessary for infants with growth velocities <15 g/kg/day. This may save costs to the hospital as the use of HMF allowed for better weight gain and earlier discharge.
- Full Text:
- Date Issued: 2018
- Authors: Wicomb, Ra-eesa
- Date: 2018
- Subjects: Premature infants -- South Africa -- Nelson Mandela Bay Municipality , Birth weight, Low -- South Africa -- Nelson Mandela Bay Municipality Birth weight -- South Africa -- Nelson Mandela Bay Municipality Infants -- Nutrition Children -- Nutrition -- Research
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/23327 , vital:30529
- Description: Rationale: Worldwide, hospitals with premature units have one generalised objective, i.e. to achieve postnatal growth and body composition similar to that of a normal foetus of similar gestational age. Optimal nutrition leads to optimal neurodevelopment and breastfeeding (BF) is known as the golden standard for infant nutrition. Human breast milk (BM) has significant value for preterm and term infants and is of special benefit to HIV infected mothers. Maternal supplementation is provided as part of the standard protocol in certain hospitals in the Eastern Cape province to those mothers who breastfeed their low birth weight (LBW) infants after delivery. human milk fortifier (HMF) is a nutritional supplement that is added to expressed breast milk for feeding preterm infants in order to meet their high energy and protein needs and therefore supporting the recommended growth velocity of 10g/kg/day-15g/kg/day. Some hospitals within South Africa provide HMF to preterm infants as part of their standard nutritional protocol in order for the infant to gain weight if BM only failed to produce adequate results. To date, little to no South African studies support or discourage the use of HMF for LBW infants. This study aimed to describe the effect of maternal supplementation compared with breast milk with HMF, or a combination of maternal supplementation and breast milk with HMF, on growth velocity in hospitalised LBW premature infants within the Nelson Mandela Bay health district. The proposed study design followed a longitudinal, observational, descriptive study in a cohort of LBW infants. The study was analytical using quantitative empirical data. Study participants were selected, by using convenience sampling, at Dora Nginza Hospital, Zwide between October 2015 and August 2016 (ethics approval: EC_2016RP27_564). Quantitative data on anthropometric measurements was collected from study participants. Primary care givers provided written informed consent. Registered nurses were trained and performed anthropometrical measurements according to standardised methods. A structured questionnaire was completed by the principal reasarcher as a source of data collection. Numerical data was described using means and standard deviations. Chi squares were used to describe the associations between maternal risk factors and birth weight outcomes. ANOVA was used to determine the relationship between growth velocity and the various supplementation groups. A sample size of 91 LBW preterm infants and mother pairs were entered into this study. The majority of mothers, 64% (n=58) fell in the age category of 20-35 years old. Of the total maternal sample (n=88), 35% (n=31) were classified in the at risk age category, i.e. <20years old and >36years old. Out of the total infant sample (n=91), 65% (n=59) was classified as VLBW, 22% was LBW and 22% (n=20) was ELBW. No statistically significant association was found between infant growth velocity and maternal risk factors. The group receiving BM with HMF had a mean growth velocity of 19.75 g/kg/day (SD=6.45) that was statistically significantly (p<0.05) more than the other groups. The maternal supplementation only group and the maternal supplementation and BM fortification group showed mean growth velocities of 12.26 g/kg/day (SD=5.41) and 12.29 g/kg/day (SD=6.97) respectively. A post hoc test was done between growth velocity in the supplementated groups and the length of hospital stay. These results reveal that the group receiving BM with HMF had a significantly (p<0.05) shorter mean length of hospital stay of 11.29 days (SD=7.02), compared with the group on the combination of maternal supplementation and BM with HMF. In this study, infants receiving HMF with BM showed the highest growth velocity with the shortest hospital stay before discharge. In this group, infants were already receiving an adequate BM intake of 150-180 ml/kg/day prior to participation in the study. This meant that the HMF group consisted of more stable preterm infants compared to the rest of the supplementated groups. However, a large proportion of participants in the maternal supplementation group also showed adequate to good growth velocity. The researcher recommends the implementation of maternal supplementation only, as standard of care for all hospitalised lactating women. Furthermore, timeous addition of HMF to expressed BM is necessary for infants with growth velocities <15 g/kg/day. This may save costs to the hospital as the use of HMF allowed for better weight gain and earlier discharge.
- Full Text:
- Date Issued: 2018
When an Editor Decides to Listen to a City: Heather Robertson, The Herald, and Nelson Mandela Bay
- Garman, Anthea, Malila, Vanessa
- Authors: Garman, Anthea , Malila, Vanessa
- Date: 2018
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/158427 , vital:40185 , ISBN 9781351664363
- Description: This book provides case studies, many incorporating in-depth interviews and surveys of journalists. It examines issues such as journalists’ attitudes toward their contributions to society; the impact of industry and technological changes; culture and minority issues in the newsroom and profession; the impact of censorship and self-censorship; and coping with psychological pressures and physical safety dilemmas. Its chapters also highlight journalists’ challenges in national and multinational contexts. International scholars, conducting research within a wide range of authoritarian, semi-democratic, and democratic systems, contributed to this examination of journalistic practices in the Arab World, Australia, Bangladesh, Bulgaria, China, Denmark, India, Kenya, Kyrgyzstan, Malaysia, Mexico, Russia, Samoa, South Africa, Taiwan, Turkey, and the United States.
- Full Text:
- Date Issued: 2018
- Authors: Garman, Anthea , Malila, Vanessa
- Date: 2018
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/158427 , vital:40185 , ISBN 9781351664363
- Description: This book provides case studies, many incorporating in-depth interviews and surveys of journalists. It examines issues such as journalists’ attitudes toward their contributions to society; the impact of industry and technological changes; culture and minority issues in the newsroom and profession; the impact of censorship and self-censorship; and coping with psychological pressures and physical safety dilemmas. Its chapters also highlight journalists’ challenges in national and multinational contexts. International scholars, conducting research within a wide range of authoritarian, semi-democratic, and democratic systems, contributed to this examination of journalistic practices in the Arab World, Australia, Bangladesh, Bulgaria, China, Denmark, India, Kenya, Kyrgyzstan, Malaysia, Mexico, Russia, Samoa, South Africa, Taiwan, Turkey, and the United States.
- Full Text:
- Date Issued: 2018
When the students are revolting: the (im) possibilities of listening in academic contexts in South Africa
- Authors: Garman, Anthea
- Date: 2018
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/158416 , vital:40182 , ISBN 978-3-319-93958-2 , https://0-doi.org.wam.seals.ac.za/10.1007/978-3-319-93958-2
- Description: Student activists in South Africa have put the decolonisation of higher education firmly on the agenda, demanding that researchers and teachers pay attention to something in particular that is very hard to hear and very possibly unhearable. These young, black South Africans are the intellectual force upon whom we are depending for the altered future of our country. We cannot change the circumstances which continue to frustrate and anger them without paying particular attention to them. Taking on the knowledge bases and knowledge generation in the Global South, they are demanding that we rethink the logos-based project of universities in South Africa. Their struggle is critically about how knowledge is implicated as a shaping force in lives which are still defined by colonial governmentality.
- Full Text:
- Date Issued: 2018
- Authors: Garman, Anthea
- Date: 2018
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/158416 , vital:40182 , ISBN 978-3-319-93958-2 , https://0-doi.org.wam.seals.ac.za/10.1007/978-3-319-93958-2
- Description: Student activists in South Africa have put the decolonisation of higher education firmly on the agenda, demanding that researchers and teachers pay attention to something in particular that is very hard to hear and very possibly unhearable. These young, black South Africans are the intellectual force upon whom we are depending for the altered future of our country. We cannot change the circumstances which continue to frustrate and anger them without paying particular attention to them. Taking on the knowledge bases and knowledge generation in the Global South, they are demanding that we rethink the logos-based project of universities in South Africa. Their struggle is critically about how knowledge is implicated as a shaping force in lives which are still defined by colonial governmentality.
- Full Text:
- Date Issued: 2018