Fundamentals of Information Systems: IFS 121 & 121E
- Boucher, D, Wayi, N, Piderit, R
- Authors: Boucher, D , Wayi, N , Piderit, R
- Date: 2009-11
- Subjects: Information resources management
- Language: English
- Type: Examination paper
- Identifier: vital:17478 , http://hdl.handle.net/10353/d1010346
- Description: Fundamentals of Information Systems: IFS 121 & 121E, examination paper November 2009.
- Full Text: false
- Date Issued: 2009-11
- Authors: Boucher, D , Wayi, N , Piderit, R
- Date: 2009-11
- Subjects: Information resources management
- Language: English
- Type: Examination paper
- Identifier: vital:17478 , http://hdl.handle.net/10353/d1010346
- Description: Fundamentals of Information Systems: IFS 121 & 121E, examination paper November 2009.
- Full Text: false
- Date Issued: 2009-11
Taxonomic notes on the eel, Muraenesox cinereus (Forsskål, 1775), in the western Indian Ocean
- Castle, P H J (Peter Henry John), Rhodes University. Department of Ichthyology
- Authors: Castle, P H J (Peter Henry John) , Rhodes University. Department of Ichthyology
- Date: 1967-12
- Subjects: Eels , Marine fishes -- Africa, Southern
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/69530 , vital:29546 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the Rhodes University, Department of Ichthyology, No. 2 , Specimens from the southeast African coast conform well in essential characters with those displayed in radiographs of Muraena tota cinerea Forsskål from the Red Sea. In contrast, Japanese specimens which have been assigned to M.cinereus have more precaudal vertebrae, a higher total number of vertebrae, more numerous dorsal rays, a broader interorbital and a larger eye. They should therefore be set aside as distinct from Forsskål’s species. An available name for these is possibly M.singaporensis (Bleeker, 1853) although insufficient is known about M.cinereus - type eels in the Indo-Malayan region for this name to be confidently applied to the Japanese form. In many features western Indian Ocean M.cinereus closely resembles M.yamaguchiensis Katayama & Takai, 1954, also from Japan.
- Full Text:
- Date Issued: 1967-12
- Authors: Castle, P H J (Peter Henry John) , Rhodes University. Department of Ichthyology
- Date: 1967-12
- Subjects: Eels , Marine fishes -- Africa, Southern
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/69530 , vital:29546 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the Rhodes University, Department of Ichthyology, No. 2 , Specimens from the southeast African coast conform well in essential characters with those displayed in radiographs of Muraena tota cinerea Forsskål from the Red Sea. In contrast, Japanese specimens which have been assigned to M.cinereus have more precaudal vertebrae, a higher total number of vertebrae, more numerous dorsal rays, a broader interorbital and a larger eye. They should therefore be set aside as distinct from Forsskål’s species. An available name for these is possibly M.singaporensis (Bleeker, 1853) although insufficient is known about M.cinereus - type eels in the Indo-Malayan region for this name to be confidently applied to the Japanese form. In many features western Indian Ocean M.cinereus closely resembles M.yamaguchiensis Katayama & Takai, 1954, also from Japan.
- Full Text:
- Date Issued: 1967-12
The Educational Journal
- Date: 1974-08
- Subjects: Education –- South Africa , South Africa -- Politics and government , Government, Resistance to -- South Africa
- Language: English
- Type: text , Article
- Identifier: http://hdl.handle.net/10948/35299 , vital:33700 , Bulk File 7
- Description: The Educational Journal was the official organ of the Teachers' League of South Africa and focussed on education within the context of a racialized South Africa.
- Full Text: false
- Date Issued: 1974-08
- Date: 1974-08
- Subjects: Education –- South Africa , South Africa -- Politics and government , Government, Resistance to -- South Africa
- Language: English
- Type: text , Article
- Identifier: http://hdl.handle.net/10948/35299 , vital:33700 , Bulk File 7
- Description: The Educational Journal was the official organ of the Teachers' League of South Africa and focussed on education within the context of a racialized South Africa.
- Full Text: false
- Date Issued: 1974-08
Comparative structural bioinformatics analysis of Bacillus amyloliquefaciens chemotaxis proteins within Bacillus subtilis group
- Yssel, Anna, Reva, Oleg, Tastan Bishop, Özlem
- Authors: Yssel, Anna , Reva, Oleg , Tastan Bishop, Özlem
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123966 , vital:35521 , https://doi.10.1007/s00253-011-3582-y
- Description: Chemotaxis is a process in which bacteria sense their chemical environment and move towards more favorable conditions. Since plant colonization by bacteria is a multifaceted process which requires a response to the complex chemical environment, a finely tuned and sensitive chemotaxis system is needed. Members of the Bacillus subtilis group including Bacillus amyloliquefaciens are industrially important, for example, as bio-pesticides. The group exhibits plant growth-promoting characteristics, with different specificity towards certain host plants. Therefore, we hypothesize that while the principal molecular mechanisms of bacterial chemotaxis may be conserved, the bacterial chemotaxis system may need an evolutionary tweaking to adapt it to specific requirements, particularly in the process of evolution of free-living soil organisms, towards plant colonization behaviour. To date, almost nothing is known about what parts of the chemotaxis proteins are subjected to positive amino acid substitutions, involved in adjusting the chemotaxis system of bacteria during speciation. In this novel study, positively selected and purified sites of chemotaxis proteins were calculated, and these residues were mapped onto homology models that were built for the chemotaxis proteins, in an attempt to understand the spatial evolution of the chemotaxis proteins. Various positively selected amino acids were identified in semi-conserved regions of the proteins away from the known active sites.
- Full Text:
- Date Issued: 2011
- Authors: Yssel, Anna , Reva, Oleg , Tastan Bishop, Özlem
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123966 , vital:35521 , https://doi.10.1007/s00253-011-3582-y
- Description: Chemotaxis is a process in which bacteria sense their chemical environment and move towards more favorable conditions. Since plant colonization by bacteria is a multifaceted process which requires a response to the complex chemical environment, a finely tuned and sensitive chemotaxis system is needed. Members of the Bacillus subtilis group including Bacillus amyloliquefaciens are industrially important, for example, as bio-pesticides. The group exhibits plant growth-promoting characteristics, with different specificity towards certain host plants. Therefore, we hypothesize that while the principal molecular mechanisms of bacterial chemotaxis may be conserved, the bacterial chemotaxis system may need an evolutionary tweaking to adapt it to specific requirements, particularly in the process of evolution of free-living soil organisms, towards plant colonization behaviour. To date, almost nothing is known about what parts of the chemotaxis proteins are subjected to positive amino acid substitutions, involved in adjusting the chemotaxis system of bacteria during speciation. In this novel study, positively selected and purified sites of chemotaxis proteins were calculated, and these residues were mapped onto homology models that were built for the chemotaxis proteins, in an attempt to understand the spatial evolution of the chemotaxis proteins. Various positively selected amino acids were identified in semi-conserved regions of the proteins away from the known active sites.
- Full Text:
- Date Issued: 2011
‘I don’t belong nowhere really’: the figure of the London migrant in Dan Jacobson’s ‘A Long Way from London’ and Jean Rhys’s ‘Let Them Call It Jazz’
- Naidu, Samantha, Thorpe, Andrea
- Authors: Naidu, Samantha , Thorpe, Andrea
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/68422 , vital:29254 , https://doi.org/10.1080/10131752.2018.1461477
- Description: Publisher version , In this article we compare and contrast the figure of the migrant, central to Dan Jacobson’s short story ‘A Long Way from London’ ([1953] 1958. A Long Way from London and other stories. London: Weidenfeld & Nicholson), and to Jean Rhys’s short story ‘Let Them Call It Jazz’ ([1962] 1987. The Collected Stories. New York: Norton), both of which are set in London in the early to mid-twentieth century. The main argument is that these figures, as migrants in London from South Africa and the Caribbean respectively, similarly occupy a liminal space despite stark differences in class, race and gender. In both stories this liminal space is described through evocations of London as a hostile diasporic space, lacking in hospitality, and experienced by the migrant figure as a place of confinement and incarceration. Also, both stories utilize the technique of silence or lacunae when it comes to issues of specific discrimination and abuse, such as racism or sexual exploitation. For the purposes of comparison, the character Manwera from ‘A Long Way from London’ and, Selina, the protagonist of ‘Let Them Call It Jazz’, are selected for analysis. Particularly, their respective responses (Manwera’s pride and dignity, and Selina’s recovery after a breakdown, and her musical talent) to the exigencies of migration are suggestive of ‘adaptive strength’ (Steve Vertovec and Robin Cohen [1999] 2001. Migration, Diasporas and Transnationalism. Cheltenham and Northampton MA: Elgar Reference Collection, xviii), a common feature in transnational literature which attempts to celebrate liminality and multiplicity as key characteristics of a transnational subjectivity. In addition, the protagonist of ‘A Long Way from London’, Arthur, offers a contrast to Manwera and Selina, not only because of race and class, but because he is depicted as having adapted to and assimilated into British culture, while being strangely detached from and ambivalent about both homeland and diasporic home. Varying forms of adaptive strength are portrayed in both stories, but they close with intimations of bleak futures for the migrant figures. The essay thus concludes with the observation that in these two stories, the figure of the London migrant is rendered as facing further grave challenges, and that all three figures ‘belong nowhere’ (Rhys [1962] 1987 Rhys, Jean. [1962] 1987. The Collected Stories. New York: Norton. [Google Scholar] , 175).
- Full Text: false
- Date Issued: 2018
- Authors: Naidu, Samantha , Thorpe, Andrea
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/68422 , vital:29254 , https://doi.org/10.1080/10131752.2018.1461477
- Description: Publisher version , In this article we compare and contrast the figure of the migrant, central to Dan Jacobson’s short story ‘A Long Way from London’ ([1953] 1958. A Long Way from London and other stories. London: Weidenfeld & Nicholson), and to Jean Rhys’s short story ‘Let Them Call It Jazz’ ([1962] 1987. The Collected Stories. New York: Norton), both of which are set in London in the early to mid-twentieth century. The main argument is that these figures, as migrants in London from South Africa and the Caribbean respectively, similarly occupy a liminal space despite stark differences in class, race and gender. In both stories this liminal space is described through evocations of London as a hostile diasporic space, lacking in hospitality, and experienced by the migrant figure as a place of confinement and incarceration. Also, both stories utilize the technique of silence or lacunae when it comes to issues of specific discrimination and abuse, such as racism or sexual exploitation. For the purposes of comparison, the character Manwera from ‘A Long Way from London’ and, Selina, the protagonist of ‘Let Them Call It Jazz’, are selected for analysis. Particularly, their respective responses (Manwera’s pride and dignity, and Selina’s recovery after a breakdown, and her musical talent) to the exigencies of migration are suggestive of ‘adaptive strength’ (Steve Vertovec and Robin Cohen [1999] 2001. Migration, Diasporas and Transnationalism. Cheltenham and Northampton MA: Elgar Reference Collection, xviii), a common feature in transnational literature which attempts to celebrate liminality and multiplicity as key characteristics of a transnational subjectivity. In addition, the protagonist of ‘A Long Way from London’, Arthur, offers a contrast to Manwera and Selina, not only because of race and class, but because he is depicted as having adapted to and assimilated into British culture, while being strangely detached from and ambivalent about both homeland and diasporic home. Varying forms of adaptive strength are portrayed in both stories, but they close with intimations of bleak futures for the migrant figures. The essay thus concludes with the observation that in these two stories, the figure of the London migrant is rendered as facing further grave challenges, and that all three figures ‘belong nowhere’ (Rhys [1962] 1987 Rhys, Jean. [1962] 1987. The Collected Stories. New York: Norton. [Google Scholar] , 175).
- Full Text: false
- Date Issued: 2018
South African marxist state theory: a critical overview
- Authors: Helliker, Kirk D
- Date: 2007
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144778 , vital:38378 , DOI: 10.1080/02589348808704885
- Description: The article provides a critical analysis of Marxist work on the South African state. It first examines the early Poulantzian‐State Derivationist debate on the relation between state and society, and then discusses the ‘new directions’ which focus on the state itself. The sensitivity of the ‘new directions’ to the traditional Weberian concern about state bureaucracy is important for enriching Marxist theory. But the article concludes by suggesting that a comprehensive dialectical Marxist approach to the South African state still awaits development.
- Full Text:
- Date Issued: 2007
- Authors: Helliker, Kirk D
- Date: 2007
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144778 , vital:38378 , DOI: 10.1080/02589348808704885
- Description: The article provides a critical analysis of Marxist work on the South African state. It first examines the early Poulantzian‐State Derivationist debate on the relation between state and society, and then discusses the ‘new directions’ which focus on the state itself. The sensitivity of the ‘new directions’ to the traditional Weberian concern about state bureaucracy is important for enriching Marxist theory. But the article concludes by suggesting that a comprehensive dialectical Marxist approach to the South African state still awaits development.
- Full Text:
- Date Issued: 2007
The geochemistry and evolution of Palaeogene phonolites, central Namibia:
- Authors: Marsh, Julian S
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/145000 , vital:38399 , https://doi.org/10.1016/j.lithos.2010.02.012
- Description: Phonolites of Palaeogene age occur at two different localities in central Namibia, occurring as clusters of eroded monogenetic lava domes. Six phonolites at Aris collectively exhibit a narrow compositional range and represent a single magma system of highly evolved phonolite with high concentrations of Na2O, Rb, Th, Zr, Zn, Pb, and REE and very low abundances of MgO, P2O5, Sr and Ba. No mafic rocks are associated with the Aris phonolites and their ultimate petrogenetic origin remains obscure. The more abundant Staalhart phonolites exhibit more variable but scattered compositional variation consistent with fractional crystallization dominated by sanidine (and nepheline) and pyroxene. The behaviour of REE is decoupled from Zr, Nb, and Th in this suite indicating a controlling role for minor phases in their evolution. The least evolved phonolites have initial 87Sr/86Sr 0.7043, which is identical to a small occurrence of associated plagioclase-bearing nephelinite indicating a possible petrogenetic link.
- Full Text:
- Date Issued: 2010
- Authors: Marsh, Julian S
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/145000 , vital:38399 , https://doi.org/10.1016/j.lithos.2010.02.012
- Description: Phonolites of Palaeogene age occur at two different localities in central Namibia, occurring as clusters of eroded monogenetic lava domes. Six phonolites at Aris collectively exhibit a narrow compositional range and represent a single magma system of highly evolved phonolite with high concentrations of Na2O, Rb, Th, Zr, Zn, Pb, and REE and very low abundances of MgO, P2O5, Sr and Ba. No mafic rocks are associated with the Aris phonolites and their ultimate petrogenetic origin remains obscure. The more abundant Staalhart phonolites exhibit more variable but scattered compositional variation consistent with fractional crystallization dominated by sanidine (and nepheline) and pyroxene. The behaviour of REE is decoupled from Zr, Nb, and Th in this suite indicating a controlling role for minor phases in their evolution. The least evolved phonolites have initial 87Sr/86Sr 0.7043, which is identical to a small occurrence of associated plagioclase-bearing nephelinite indicating a possible petrogenetic link.
- Full Text:
- Date Issued: 2010
Growth and longevity of Exosphaeroma hylocoetes (Isopoda) under varying conditions of salinity and temperature
- Henninger, Tony O, Froneman, P William, Booth, Anthony J, Hodgson, Alan N
- Authors: Henninger, Tony O , Froneman, P William , Booth, Anthony J , Hodgson, Alan N
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124571 , vital:35630 , https://doi.org/10.3377/004.045.0118
- Description: Numerous studies have documented the importance of both temperature and salinity in influencing aquatic crustacean metabolic processes such as respiration and growth. For example, increased water temperatures have been shown to increase respiration rates in various species of shrimp (Chen & Nan 1993; Spanonopoulos-Hernándeza et al. 2005; Allan et al. 2006), and copepods (Isla & Perissinotto 2004). The response of invertebrates to changes in salinity is more complex, largely reflecting their evolutionary origins (Kinne 1966). For example, juvenile blue swimming crabs, Portunus pelagicus, displayed significantly faster growth and higher survival in response to increasingsalinity (Romano & Zeng 2006). Additional factors that may influence the growth rates of crustaceans include photoperiod (Gambardella et al. 1997), food availability (Shuster & Guthrie 1999) and sex (Newman et al. 2007).
- Full Text:
- Date Issued: 2010
- Authors: Henninger, Tony O , Froneman, P William , Booth, Anthony J , Hodgson, Alan N
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124571 , vital:35630 , https://doi.org/10.3377/004.045.0118
- Description: Numerous studies have documented the importance of both temperature and salinity in influencing aquatic crustacean metabolic processes such as respiration and growth. For example, increased water temperatures have been shown to increase respiration rates in various species of shrimp (Chen & Nan 1993; Spanonopoulos-Hernándeza et al. 2005; Allan et al. 2006), and copepods (Isla & Perissinotto 2004). The response of invertebrates to changes in salinity is more complex, largely reflecting their evolutionary origins (Kinne 1966). For example, juvenile blue swimming crabs, Portunus pelagicus, displayed significantly faster growth and higher survival in response to increasingsalinity (Romano & Zeng 2006). Additional factors that may influence the growth rates of crustaceans include photoperiod (Gambardella et al. 1997), food availability (Shuster & Guthrie 1999) and sex (Newman et al. 2007).
- Full Text:
- Date Issued: 2010
Nocturnal oviposition behavior of blowflies (Diptera: Calliphoridae) in the southern hemisphere (South Africa and Australia) and its forensic implications:
- Williams, Kirstin A, Wallman, James F, Lessard, Bryan D, Kavazos, Christopher R J, Mazungula, D Nkosinathi, Villet, Martin H
- Authors: Williams, Kirstin A , Wallman, James F , Lessard, Bryan D , Kavazos, Christopher R J , Mazungula, D Nkosinathi , Villet, Martin H
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140832 , vital:37922 , DOI: 10.1007/s12024-017-9861-x
- Description: Published research has offered contradictory evidence of the occurrence of nocturnal oviposition by carrion-breeding blowflies, a behavior that can affect the interpretation of forensic estimates of a minimum post mortem interval (minPMI) by up to 12 hours, depending on latitude and season. The majority of published studies are from the northern hemisphere. Field experiments were conducted in South Africa and Australia that extend observations to species of the southern hemisphere. Various vertebrate carrion was exposed at night in summer under different lunar phases and/or artificial lighting, and in woodland and pasture areas. Three laboratory experiments were also conducted. No nocturnal oviposition occurred outdoors in Berry, Australia, but Lucilia cuprina, Lucilia sericata and Chrysomya megacephala laid eggs outdoors at night in Grahamstown and Durban, South Africa. In laboratory experiments L. sericata, L. cuprina, Chrysomya chloropyga and Chrysomya putoria laid eggs and Calliphora augur deposited larvae under nocturnal conditions.
- Full Text:
- Date Issued: 2017
- Authors: Williams, Kirstin A , Wallman, James F , Lessard, Bryan D , Kavazos, Christopher R J , Mazungula, D Nkosinathi , Villet, Martin H
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140832 , vital:37922 , DOI: 10.1007/s12024-017-9861-x
- Description: Published research has offered contradictory evidence of the occurrence of nocturnal oviposition by carrion-breeding blowflies, a behavior that can affect the interpretation of forensic estimates of a minimum post mortem interval (minPMI) by up to 12 hours, depending on latitude and season. The majority of published studies are from the northern hemisphere. Field experiments were conducted in South Africa and Australia that extend observations to species of the southern hemisphere. Various vertebrate carrion was exposed at night in summer under different lunar phases and/or artificial lighting, and in woodland and pasture areas. Three laboratory experiments were also conducted. No nocturnal oviposition occurred outdoors in Berry, Australia, but Lucilia cuprina, Lucilia sericata and Chrysomya megacephala laid eggs outdoors at night in Grahamstown and Durban, South Africa. In laboratory experiments L. sericata, L. cuprina, Chrysomya chloropyga and Chrysomya putoria laid eggs and Calliphora augur deposited larvae under nocturnal conditions.
- Full Text:
- Date Issued: 2017
Ucla xenogrammus, a new genus and species of Indo-Pacific fishes (Perciformes: Tripterygiidae)
- Holleman, W. (Wouter), 1943-, J.L.B. Smith Institute of Ichthyology
- Authors: Holleman, W. (Wouter), 1943- , J.L.B. Smith Institute of Ichthyology
- Date: 1993-04
- Subjects: Ucla xenogrammus -- Indo-Pacific Region -- Identification , Tripterygiidae -- Indo-Pacific Region
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/70937 , vital:29763 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 55 , Ucla xenogrammus, a monotypic genus of tripterygiid fishes, which is widespread in the Indo-West Pacific Ocean, is formally described, the unpublished names given by Richard Rosenblatt in 1959 being retained. Ucla xenogrammus is distinguished from all other tripterygiid fishes by its protruding lower jaw, depressible acicular teeth and grooved scales in the posterior portion of the lateral line.
- Full Text:
- Date Issued: 1993-04
- Authors: Holleman, W. (Wouter), 1943- , J.L.B. Smith Institute of Ichthyology
- Date: 1993-04
- Subjects: Ucla xenogrammus -- Indo-Pacific Region -- Identification , Tripterygiidae -- Indo-Pacific Region
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/70937 , vital:29763 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 55 , Ucla xenogrammus, a monotypic genus of tripterygiid fishes, which is widespread in the Indo-West Pacific Ocean, is formally described, the unpublished names given by Richard Rosenblatt in 1959 being retained. Ucla xenogrammus is distinguished from all other tripterygiid fishes by its protruding lower jaw, depressible acicular teeth and grooved scales in the posterior portion of the lateral line.
- Full Text:
- Date Issued: 1993-04
Examining the nature of learning within an afterschool mathematics club : a case study of four learners
- Pohamba, Penehafo K, Graven, Mellony, Stott, Deborah A, Ashipala, Daniel O
- Authors: Pohamba, Penehafo K , Graven, Mellony , Stott, Deborah A , Ashipala, Daniel O
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/70121 , vital:29623 , http://dx.doi.org/10.5430/irhe.v2n1p21
- Description: This study examined the nature of learning within an afterschool mathematics club established by the South African Numeracy Chair project. This study sought to establish what sort of progress in mathematical learning occurred in a grade 3 afterschool maths club, using assessment instruments associated with the Learning Framework in Number. The study also sought to understand the nature and effects of mentor mediation in the maths club, using Vygotsky’s notion of the Zone of Proximal Development (ZPD) together with the notion and practice of scaffolding. This study was interpretive in nature drawing on qualitative methods with some elements of quantification in relation to learners’ progression. The club consists of 10 learners of mixed ability (5 girls and 5 boys) at a township school in Graham’s town, South Africa. Learners in this case study were selected through purposive sampling. As part of the data collection strategies, the learners were interviewed twice in terms of their numeracy proficiency. The assessment interview results revealed that, in terms of proficiency in early arithmetical learning, all four learners showed progress after spending four months in an afterschool maths club. This study also recommended Wright et al.’s (2006) LFIN framework to be used in assessing learners’ progress in mathematics, as it could inform the refinement of instructional design within the school curriculum and teachers’ education in the Namibian context.
- Full Text:
- Date Issued: 2017
- Authors: Pohamba, Penehafo K , Graven, Mellony , Stott, Deborah A , Ashipala, Daniel O
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/70121 , vital:29623 , http://dx.doi.org/10.5430/irhe.v2n1p21
- Description: This study examined the nature of learning within an afterschool mathematics club established by the South African Numeracy Chair project. This study sought to establish what sort of progress in mathematical learning occurred in a grade 3 afterschool maths club, using assessment instruments associated with the Learning Framework in Number. The study also sought to understand the nature and effects of mentor mediation in the maths club, using Vygotsky’s notion of the Zone of Proximal Development (ZPD) together with the notion and practice of scaffolding. This study was interpretive in nature drawing on qualitative methods with some elements of quantification in relation to learners’ progression. The club consists of 10 learners of mixed ability (5 girls and 5 boys) at a township school in Graham’s town, South Africa. Learners in this case study were selected through purposive sampling. As part of the data collection strategies, the learners were interviewed twice in terms of their numeracy proficiency. The assessment interview results revealed that, in terms of proficiency in early arithmetical learning, all four learners showed progress after spending four months in an afterschool maths club. This study also recommended Wright et al.’s (2006) LFIN framework to be used in assessing learners’ progress in mathematics, as it could inform the refinement of instructional design within the school curriculum and teachers’ education in the Namibian context.
- Full Text:
- Date Issued: 2017
Introduction to Crop Science: AGC 121 & AGC 121F
- Owusu-Aduomi O K, Mutengwa, C
- Authors: Owusu-Aduomi O K , Mutengwa, C
- Date: 2010-11
- Language: English
- Type: Examination paper
- Identifier: vital:17644 , http://hdl.handle.net/10353/d1010022
- Description: Introduction to Crop Science: AGC 121 & AGC 121F, degree examination November 2010.
- Full Text: false
- Date Issued: 2010-11
- Authors: Owusu-Aduomi O K , Mutengwa, C
- Date: 2010-11
- Language: English
- Type: Examination paper
- Identifier: vital:17644 , http://hdl.handle.net/10353/d1010022
- Description: Introduction to Crop Science: AGC 121 & AGC 121F, degree examination November 2010.
- Full Text: false
- Date Issued: 2010-11
Deagrarianisation and forest revegetation in a biodiversity hotspot on the Wild Coast, South Africa
- Shackleton, Ross T, Shackleton, Charlie M, Shackleton, Sheona E, Gambiza, James
- Authors: Shackleton, Ross T , Shackleton, Charlie M , Shackleton, Sheona E , Gambiza, James
- Date: 2013
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/60984 , vital:27905 , doi:10.1371/journal.pone.0076939
- Description: Deagraianisation is a worldwide phenomenon with widespread social, ecological and economic effects yet with little consensus on the local or higher level causes. There have been contested views on the causes and consequences of deagrarianisation on South Africa’s Wild Coast, which is an international biodiversity hotspot. Using GIS, household interviews and ecological sampling, we compared the perspectives of current and former cultivators as to why some have abandoned farming, whilst also tracking the uses and woody plant cover and composition of fields abandoned at different periods. The GIS analysis showed that field abandonment had been ongoing over several decades, with a decline from 12.5 % field cover in 1961 to 2.7 % in 2009. The area of forests and woodlands almost doubled in the corresponding period. There was a distinct peak in field abandonment during the time of political transition at the national level in the early 1990s. This political change led to a decrease in government support for livestock farming, which in turn resulted in reduced animal draught power at the household and community level, and hence reduced cropping. The study showed it is largely the wealthier households that have remained in arable agriculture and that the poorer households have abandoned farming. The abandoned fields show a distinct trend of increasing woody biomass and species richness with length of time since abandonment, with approximately three woody plant species added per decade. Most local respondents dislike the increases in forest and woodland extent and density because of anxiety about wild animals causing harm to crops and even humans, and the loss of an agricultural identity to livelihoods and the landscape.
- Full Text:
- Date Issued: 2013
- Authors: Shackleton, Ross T , Shackleton, Charlie M , Shackleton, Sheona E , Gambiza, James
- Date: 2013
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/60984 , vital:27905 , doi:10.1371/journal.pone.0076939
- Description: Deagraianisation is a worldwide phenomenon with widespread social, ecological and economic effects yet with little consensus on the local or higher level causes. There have been contested views on the causes and consequences of deagrarianisation on South Africa’s Wild Coast, which is an international biodiversity hotspot. Using GIS, household interviews and ecological sampling, we compared the perspectives of current and former cultivators as to why some have abandoned farming, whilst also tracking the uses and woody plant cover and composition of fields abandoned at different periods. The GIS analysis showed that field abandonment had been ongoing over several decades, with a decline from 12.5 % field cover in 1961 to 2.7 % in 2009. The area of forests and woodlands almost doubled in the corresponding period. There was a distinct peak in field abandonment during the time of political transition at the national level in the early 1990s. This political change led to a decrease in government support for livestock farming, which in turn resulted in reduced animal draught power at the household and community level, and hence reduced cropping. The study showed it is largely the wealthier households that have remained in arable agriculture and that the poorer households have abandoned farming. The abandoned fields show a distinct trend of increasing woody biomass and species richness with length of time since abandonment, with approximately three woody plant species added per decade. Most local respondents dislike the increases in forest and woodland extent and density because of anxiety about wild animals causing harm to crops and even humans, and the loss of an agricultural identity to livelihoods and the landscape.
- Full Text:
- Date Issued: 2013
The Educational Journal
- Date: 1976-12
- Subjects: Education –- South Africa , South Africa -- Politics and government , Government, Resistance to -- South Africa
- Language: English
- Type: text , Article
- Identifier: http://hdl.handle.net/10948/34997 , vital:33595 , Bulk File 7
- Description: The Educational Journal was the official organ of the Teachers' League of South Africa and focussed on education within the context of a racialized South Africa.
- Full Text: false
- Date Issued: 1976-12
- Date: 1976-12
- Subjects: Education –- South Africa , South Africa -- Politics and government , Government, Resistance to -- South Africa
- Language: English
- Type: text , Article
- Identifier: http://hdl.handle.net/10948/34997 , vital:33595 , Bulk File 7
- Description: The Educational Journal was the official organ of the Teachers' League of South Africa and focussed on education within the context of a racialized South Africa.
- Full Text: false
- Date Issued: 1976-12
A new luminous cardinalfish of the genus Apogon (Perciformes:Apogonidae) from the western Pacific Ocean
- Gon, O (Ofer), 1949-, Allen, Gerald R, J.L.B. Smith Institute of Ichthyology
- Authors: Gon, O (Ofer), 1949- , Allen, Gerald R , J.L.B. Smith Institute of Ichthyology
- Date: 1998-11
- Subjects: Apogon -- Pacific Ocean -- Classification , Apogon -- Pacific Ocean -- Identification , Bioluminescence -- Pacific Ocean
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/71022 , vital:29770 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 62 , A new species of cardinalfish, Apogon photogaster is described based on 11 specimens from Madang Lagoon in Papua New Guinea and Galoc Island in the Philippines. This new species has 15 pectoral rays, 2 predorsal scales, 15-18 gill-rakers (8-9 developed), and 7 gill-rakers on the ceratobranchial o f the first gill-arch. It has a unique bioluminescent system, including a light organ branching forward from the second loop of the intestine and a diffuser organ along the ventrolateral part of the body.
- Full Text:
- Date Issued: 1998-11
- Authors: Gon, O (Ofer), 1949- , Allen, Gerald R , J.L.B. Smith Institute of Ichthyology
- Date: 1998-11
- Subjects: Apogon -- Pacific Ocean -- Classification , Apogon -- Pacific Ocean -- Identification , Bioluminescence -- Pacific Ocean
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/71022 , vital:29770 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 62 , A new species of cardinalfish, Apogon photogaster is described based on 11 specimens from Madang Lagoon in Papua New Guinea and Galoc Island in the Philippines. This new species has 15 pectoral rays, 2 predorsal scales, 15-18 gill-rakers (8-9 developed), and 7 gill-rakers on the ceratobranchial o f the first gill-arch. It has a unique bioluminescent system, including a light organ branching forward from the second loop of the intestine and a diffuser organ along the ventrolateral part of the body.
- Full Text:
- Date Issued: 1998-11
The deepwater fish Scombrosphyraena oceanica from the Caribbean Sea: with comments on its possible relationships
- Fraser, Thomas H, Fourmanoir, P, Rhodes University. J.L.B. Smith Institute of Ichthyology
- Authors: Fraser, Thomas H , Fourmanoir, P , Rhodes University. J.L.B. Smith Institute of Ichthyology
- Date: 1971-07
- Subjects: Scombrosphyraena oceanica , Deep-sea fishes -- Caribbean Sea , Fishes -- Classification , Fishes -- Caribbean Sea , Marine fishes
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/69619 , vital:29559 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 8 , The fish Scombrosphyraena oceanica is recorded from the Atlantic Ocean for the first time. A redescription is given. This genus is tentatively placed in the Percichthyidae. The family Scombropidae is shown to be an artificial grouping.
- Full Text:
- Date Issued: 1971-07
- Authors: Fraser, Thomas H , Fourmanoir, P , Rhodes University. J.L.B. Smith Institute of Ichthyology
- Date: 1971-07
- Subjects: Scombrosphyraena oceanica , Deep-sea fishes -- Caribbean Sea , Fishes -- Classification , Fishes -- Caribbean Sea , Marine fishes
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/69619 , vital:29559 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 8 , The fish Scombrosphyraena oceanica is recorded from the Atlantic Ocean for the first time. A redescription is given. This genus is tentatively placed in the Percichthyidae. The family Scombropidae is shown to be an artificial grouping.
- Full Text:
- Date Issued: 1971-07
Developing visual images for communicating information aboutantiretroviral side effects to a low-literate population:
- Dowse, Roslind, Ramela, Thato, Barford, Kirsty-Lee, Browne, Sara H
- Authors: Dowse, Roslind , Ramela, Thato , Barford, Kirsty-Lee , Browne, Sara H
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/156769 , vital:40048 , https://doi.org/10.2989/16085906.2010.530172
- Description: The side effects of antiretroviral (ARV) therapy are linked to altered quality of life and adherence. Poor adherence has also been associated with low health-literacy skills, with an uninformed patient more likely to make ARV-related decisions that compromise the efficacy of the treatment. Low literacy skills disempower patients in interactions with healthcare providers and preclude the use of existing written patient information materials, which are generally written at a high reading level. Visual images or pictograms used as a counselling tool or included in patient information leaflets have been shown to improve patients’ knowledge, particularly in low-literate groups. The objective of this study was to design visuals or pictograms illustrating various ARV side effects and to evaluate them in a low-literate South African Xhosa population. Core images were generated either from a design workshop or from posed photos or images from textbooks. The research team worked closely with a graphic artist. Initial versions of the images were discussed and assessed in group discussions, and then modified and eventually evaluated quantitatively in individual interviews with 40 participants who each had a maximum of 10 years of schooling.
- Full Text:
- Date Issued: 2011
- Authors: Dowse, Roslind , Ramela, Thato , Barford, Kirsty-Lee , Browne, Sara H
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/156769 , vital:40048 , https://doi.org/10.2989/16085906.2010.530172
- Description: The side effects of antiretroviral (ARV) therapy are linked to altered quality of life and adherence. Poor adherence has also been associated with low health-literacy skills, with an uninformed patient more likely to make ARV-related decisions that compromise the efficacy of the treatment. Low literacy skills disempower patients in interactions with healthcare providers and preclude the use of existing written patient information materials, which are generally written at a high reading level. Visual images or pictograms used as a counselling tool or included in patient information leaflets have been shown to improve patients’ knowledge, particularly in low-literate groups. The objective of this study was to design visuals or pictograms illustrating various ARV side effects and to evaluate them in a low-literate South African Xhosa population. Core images were generated either from a design workshop or from posed photos or images from textbooks. The research team worked closely with a graphic artist. Initial versions of the images were discussed and assessed in group discussions, and then modified and eventually evaluated quantitatively in individual interviews with 40 participants who each had a maximum of 10 years of schooling.
- Full Text:
- Date Issued: 2011
The Educational Journal
- Date: 1972-11
- Subjects: Education –- South Africa , South Africa -- Politics and government , Government, Resistance to -- South Africa
- Language: English
- Type: text , Article
- Identifier: http://hdl.handle.net/10948/35575 , vital:33758 , Bulk File 7
- Description: The Educational Journal was the official organ of the Teachers' League of South Africa and focussed on education within the context of a racialized South Africa.
- Full Text: false
- Date Issued: 1972-11
- Date: 1972-11
- Subjects: Education –- South Africa , South Africa -- Politics and government , Government, Resistance to -- South Africa
- Language: English
- Type: text , Article
- Identifier: http://hdl.handle.net/10948/35575 , vital:33758 , Bulk File 7
- Description: The Educational Journal was the official organ of the Teachers' League of South Africa and focussed on education within the context of a racialized South Africa.
- Full Text: false
- Date Issued: 1972-11
The contributions of biological control to reduced plant size and biomass of water hyacinth populations
- Jones, Roy W, Hill, Jaclyn M, Coetzee, Julie A, Hill, Martin P
- Authors: Jones, Roy W , Hill, Jaclyn M , Coetzee, Julie A , Hill, Martin P
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/68803 , vital:29326 , https://0-doi.org.wam.seals.ac.za/10.1007/s10750-017-3413-y
- Description: Water hyacinth is invasive in many countries, where it reduces aquatic biodiversity and limits water resource utilisation. Biological control of water hyacinth has been successful in South Africa, but has suffered from a lack of empirical data to prove causation. Insect exclusion trials were conducted to quantify the contribution of Neochetina eichhorniae and N. bruchi to the integrated control of water hyacinth on the Nseleni River, South Africa. Insecticide was not expected to induce phytotoxicity, but would prevent weevil damage in water hyacinth plants; and weevil herbivory was predicted to reduce plant petiole length, and above/below surface biomass. Results showed that insecticide had no phytotoxic effects and excluded weevils for 3 weeks, providing a baseline for field applications. Biological control on the Nseleni River directly affected water hyacinth biomass and petiole length, but did not affect plant cover. Plants subject to weevil herbivory demonstrated reductions in above and below surface biomass and had shorter petioles compared to insect-free plants. Dead biomass was also higher in biological control treatments. Biological control strongly affects plant size, biomass and vigour; however, further integrated control is required to facilitate reduction in mat cover, which is the goalpost for successful control of floating aquatic plants.
- Full Text: false
- Date Issued: 2018
- Authors: Jones, Roy W , Hill, Jaclyn M , Coetzee, Julie A , Hill, Martin P
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/68803 , vital:29326 , https://0-doi.org.wam.seals.ac.za/10.1007/s10750-017-3413-y
- Description: Water hyacinth is invasive in many countries, where it reduces aquatic biodiversity and limits water resource utilisation. Biological control of water hyacinth has been successful in South Africa, but has suffered from a lack of empirical data to prove causation. Insect exclusion trials were conducted to quantify the contribution of Neochetina eichhorniae and N. bruchi to the integrated control of water hyacinth on the Nseleni River, South Africa. Insecticide was not expected to induce phytotoxicity, but would prevent weevil damage in water hyacinth plants; and weevil herbivory was predicted to reduce plant petiole length, and above/below surface biomass. Results showed that insecticide had no phytotoxic effects and excluded weevils for 3 weeks, providing a baseline for field applications. Biological control on the Nseleni River directly affected water hyacinth biomass and petiole length, but did not affect plant cover. Plants subject to weevil herbivory demonstrated reductions in above and below surface biomass and had shorter petioles compared to insect-free plants. Dead biomass was also higher in biological control treatments. Biological control strongly affects plant size, biomass and vigour; however, further integrated control is required to facilitate reduction in mat cover, which is the goalpost for successful control of floating aquatic plants.
- Full Text: false
- Date Issued: 2018
The concentration of economic power in South Africa
- TURP
- Authors: TURP
- Date: 1991
- Subjects: TURP
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/160931 , vital:40568
- Description: Debate on a post-apartheid economy has once again raised the question of the concentration of economic power in South Africa. It is a known fact that the wealth of South Africa is concentrated in a few hands. For example, it is estimated that 5 % of the population owns 80% of the wealth in the country. At the same time, millions of our people live in poverty. Over half the population in South Africa live below the poverty datum lines (amounts needed for very basic subsistence).
- Full Text:
- Date Issued: 1991
- Authors: TURP
- Date: 1991
- Subjects: TURP
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/160931 , vital:40568
- Description: Debate on a post-apartheid economy has once again raised the question of the concentration of economic power in South Africa. It is a known fact that the wealth of South Africa is concentrated in a few hands. For example, it is estimated that 5 % of the population owns 80% of the wealth in the country. At the same time, millions of our people live in poverty. Over half the population in South Africa live below the poverty datum lines (amounts needed for very basic subsistence).
- Full Text:
- Date Issued: 1991