A digital watermarking scheme for Bezier surfaces
- Chadwick, J, Bangay, Shaun D, Wentworth, Peter E
- Authors: Chadwick, J , Bangay, Shaun D , Wentworth, Peter E
- Date: 2003
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/432769 , vital:72898 , https://www.cs.ru.ac.za/research/groups/vrsig/pastprojects/046watermarking/paper01.pdf
- Description: Owners and vendors are increasingly publishing their materials in digital form. Because such materials can be exactly copied, a mechanism is required that will protect the legitimate owners of these works, by providing proof of original ownership. Digital watermarking has now become one accepted method of establishing ownership of digital materials. The owner of a work embeds a pattern, called a digital watermark, in the content. This embedded watermark is normally undetectable, but its presence can be demonstrated by the owner of the work or his agent, thereby proving ownership. Digital watermarking has been used for many types of multimedia content, primarily audio, video and flat images. Recently, interest has been shown in applying digital watermarking schemes to 3D surfaces, in various formats. In this paper, we examine a method whereby a digital watermark can be embedded in a Bezier surface. A prototype watermarking method for such surfaces is presented, with some experimental results, and a discussion of directions for future research.
- Full Text:
- Date Issued: 2003
- Authors: Chadwick, J , Bangay, Shaun D , Wentworth, Peter E
- Date: 2003
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/432769 , vital:72898 , https://www.cs.ru.ac.za/research/groups/vrsig/pastprojects/046watermarking/paper01.pdf
- Description: Owners and vendors are increasingly publishing their materials in digital form. Because such materials can be exactly copied, a mechanism is required that will protect the legitimate owners of these works, by providing proof of original ownership. Digital watermarking has now become one accepted method of establishing ownership of digital materials. The owner of a work embeds a pattern, called a digital watermark, in the content. This embedded watermark is normally undetectable, but its presence can be demonstrated by the owner of the work or his agent, thereby proving ownership. Digital watermarking has been used for many types of multimedia content, primarily audio, video and flat images. Recently, interest has been shown in applying digital watermarking schemes to 3D surfaces, in various formats. In this paper, we examine a method whereby a digital watermark can be embedded in a Bezier surface. A prototype watermarking method for such surfaces is presented, with some experimental results, and a discussion of directions for future research.
- Full Text:
- Date Issued: 2003
Observed metabolic changes in male Wistar rats after treatment with an antidepressant implied in undesirable weight gain, or Sutherlandia frutescens for Type II diabetes
- Authors: Chadwick, Wayne
- Date: 2003
- Subjects: Rats -- Metabolism , Non-insulin-dependent diabetes -- Research , Rats as laboratory animals
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11068 , http://hdl.handle.net/10948/313 , Rats -- Metabolism , Non-insulin-dependent diabetes -- Research , Rats as laboratory animals
- Description: Type II diabetes is fast becoming a growing problem in developed countries worldwide. Traditionally the median age for diagnosis was around sixty, but recent surveys have shown that the entire age distribution curve has shifted to the left. Western countries boast the worst statistics in which type II diabetes is being reported in children under the age of ten. At such a young age the disease often goes undiagnosed for long periods of time allowing considerable damage to occur. The incidence of type II diabetes is thought to be parallel with the growing rate of obesity associated with a characteristically unhealthy western diet. Type II diabetes is an extremely expensive disease to manage, and with the rapid growth of this pandemic our country will soon feel the economic burden of this disease. It is for this reason that cheaper medication needs to be investigated in the form of traditional plants, such as Sutherlandia frutescens. Prescription medication, such as tricyclic antidepressants, may also increase body weight or appetite thereby playing a role in obesity. The cause of weight gain in such cases may go unrecognized or lead to cessation of the medication with or without the practitioner’s knowledge or approval. It is therefore necessary to investigate the causative agents responsible for the excessive weight gain. Drinking water containing extracts of the S. frutescens, metformin (a well known type II diabetes medication) and amitriptyline (a common tricyclic antidepressant) was administered to three groups of ten male Wistar rats. The control group received water without any medication. The rat’s weight and food consumption was monitored throughout the trial and their oxygen consumption was also determined. Rats were sacrificed after four months of medicinal compliance and glucose uptake, in the presence and absence of insulin, was tested in epididymal fat, liver and muscle. Fasting plasma glucose levels, lipoprotein, cholesterol and triglyceride concentrations were also determined.
- Full Text:
- Date Issued: 2003
- Authors: Chadwick, Wayne
- Date: 2003
- Subjects: Rats -- Metabolism , Non-insulin-dependent diabetes -- Research , Rats as laboratory animals
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11068 , http://hdl.handle.net/10948/313 , Rats -- Metabolism , Non-insulin-dependent diabetes -- Research , Rats as laboratory animals
- Description: Type II diabetes is fast becoming a growing problem in developed countries worldwide. Traditionally the median age for diagnosis was around sixty, but recent surveys have shown that the entire age distribution curve has shifted to the left. Western countries boast the worst statistics in which type II diabetes is being reported in children under the age of ten. At such a young age the disease often goes undiagnosed for long periods of time allowing considerable damage to occur. The incidence of type II diabetes is thought to be parallel with the growing rate of obesity associated with a characteristically unhealthy western diet. Type II diabetes is an extremely expensive disease to manage, and with the rapid growth of this pandemic our country will soon feel the economic burden of this disease. It is for this reason that cheaper medication needs to be investigated in the form of traditional plants, such as Sutherlandia frutescens. Prescription medication, such as tricyclic antidepressants, may also increase body weight or appetite thereby playing a role in obesity. The cause of weight gain in such cases may go unrecognized or lead to cessation of the medication with or without the practitioner’s knowledge or approval. It is therefore necessary to investigate the causative agents responsible for the excessive weight gain. Drinking water containing extracts of the S. frutescens, metformin (a well known type II diabetes medication) and amitriptyline (a common tricyclic antidepressant) was administered to three groups of ten male Wistar rats. The control group received water without any medication. The rat’s weight and food consumption was monitored throughout the trial and their oxygen consumption was also determined. Rats were sacrificed after four months of medicinal compliance and glucose uptake, in the presence and absence of insulin, was tested in epididymal fat, liver and muscle. Fasting plasma glucose levels, lipoprotein, cholesterol and triglyceride concentrations were also determined.
- Full Text:
- Date Issued: 2003
An investigation into the feeding biology and factors influencing the population dynamics of Terebrasabella heterouncinata (Polychaeta: Sabellidae), a problematic tube-dwelling polychaete in farmed abalone in South Africa
- Authors: Chalmers, Russell
- Date: 2003
- Subjects: Polychaeta -- South Africa , Sabellidae -- South Africa , Abalones -- Feeding and feeds -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5291 , http://hdl.handle.net/10962/d1005136 , Polychaeta -- South Africa , Sabellidae -- South Africa , Abalones -- Feeding and feeds -- South Africa
- Description: Since the discovery of a new species of sabellid worm in 1993, the Californian and South African abalone industries have experienced increasing shell breakage and reduced growth rates of abalone, resulting in reduced market value of product. This polychaete worm can reach very high infestation levels. It was described as Terebrasabella heterouncinata in 1999, having originated from the South African coastline where it had been observed on several wild mollusc species. Although not a shell borer, it occupies tubes on the growing edge which are formed by deposition of nacreous shell over sabellid larvae by the host abalone. Heavy sabellid infestation levels have placed the economic viability of several South African farms under threat. Past research methods have not been successful in establishing effective means of eradication or control, partly due to the lack of knowledge of basic biological information on this species. This study forms the first part of an ongoing research project into the biology of terebrasabella heterouncinata. Abalone farms in South African utilise two main diets in abalone culture. An artificial formulated feed, Abfeed, is produced in South Africa and is used by the majority of farms as it increases abalone growth rate. Kelp, a natural diet of abalone, is harvested and also used as a feed. Farmers have observed higher sabellid infestation levels on Abfeed-fed abalone and suspect that diet may be an important factor influencing sabellid infestation. Abalone stocking density has also been identified as a potential factor influencing sabellid population growth on commercial farms. In order to better understand sabellid nutrition, the feeding behaviour of the sabellid in response to suspended solids of various particle size classes from both abalone diets were investigated. Both the effect of abalone diet and stocking density and their effects on sabellid morphometrics were quantified. The proximate composition and particle size distribution of suspended-solids present within kelp and Abfeed abalone raceways were also quantified. Results indicate that sabellid feeding follows no structured behavioural pattern for both abalone diets. The quantity of suspended solids in kelp raceways was greater than in Abfeed raceways (p<0.02) while there was no difference in particulate level between three abalone stocking densities (p>0.05). Protein (p<0.0001) and energy (p<0.0.1) levels of suspended solids were significantly greater in raceways dedicated to feeding Abfeed. The infestation level (number of tubes/centimetre on the grwoing edge) was significantly higher (p<0.001) in Abfeed-fed abalone. The morphometrics of the sabellids indicated that sabellids from Abfeed-fed abalone were larger in various body measurements: length (p<0.00001); neck width (p<0.001); base width (p<0.001); and surface area (p<0.001). This study suggests that abalone diet has an important influence on the infestation level and size of sabellids and that this is likely to be due to the fragmentation and leaching of nutrients from the artificially enriched commercial abalone diet.
- Full Text:
- Date Issued: 2003
- Authors: Chalmers, Russell
- Date: 2003
- Subjects: Polychaeta -- South Africa , Sabellidae -- South Africa , Abalones -- Feeding and feeds -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5291 , http://hdl.handle.net/10962/d1005136 , Polychaeta -- South Africa , Sabellidae -- South Africa , Abalones -- Feeding and feeds -- South Africa
- Description: Since the discovery of a new species of sabellid worm in 1993, the Californian and South African abalone industries have experienced increasing shell breakage and reduced growth rates of abalone, resulting in reduced market value of product. This polychaete worm can reach very high infestation levels. It was described as Terebrasabella heterouncinata in 1999, having originated from the South African coastline where it had been observed on several wild mollusc species. Although not a shell borer, it occupies tubes on the growing edge which are formed by deposition of nacreous shell over sabellid larvae by the host abalone. Heavy sabellid infestation levels have placed the economic viability of several South African farms under threat. Past research methods have not been successful in establishing effective means of eradication or control, partly due to the lack of knowledge of basic biological information on this species. This study forms the first part of an ongoing research project into the biology of terebrasabella heterouncinata. Abalone farms in South African utilise two main diets in abalone culture. An artificial formulated feed, Abfeed, is produced in South Africa and is used by the majority of farms as it increases abalone growth rate. Kelp, a natural diet of abalone, is harvested and also used as a feed. Farmers have observed higher sabellid infestation levels on Abfeed-fed abalone and suspect that diet may be an important factor influencing sabellid infestation. Abalone stocking density has also been identified as a potential factor influencing sabellid population growth on commercial farms. In order to better understand sabellid nutrition, the feeding behaviour of the sabellid in response to suspended solids of various particle size classes from both abalone diets were investigated. Both the effect of abalone diet and stocking density and their effects on sabellid morphometrics were quantified. The proximate composition and particle size distribution of suspended-solids present within kelp and Abfeed abalone raceways were also quantified. Results indicate that sabellid feeding follows no structured behavioural pattern for both abalone diets. The quantity of suspended solids in kelp raceways was greater than in Abfeed raceways (p<0.02) while there was no difference in particulate level between three abalone stocking densities (p>0.05). Protein (p<0.0001) and energy (p<0.0.1) levels of suspended solids were significantly greater in raceways dedicated to feeding Abfeed. The infestation level (number of tubes/centimetre on the grwoing edge) was significantly higher (p<0.001) in Abfeed-fed abalone. The morphometrics of the sabellids indicated that sabellids from Abfeed-fed abalone were larger in various body measurements: length (p<0.00001); neck width (p<0.001); base width (p<0.001); and surface area (p<0.001). This study suggests that abalone diet has an important influence on the infestation level and size of sabellids and that this is likely to be due to the fragmentation and leaching of nutrients from the artificially enriched commercial abalone diet.
- Full Text:
- Date Issued: 2003
Isolation, expression and purification of the hydantoin hydrolysing enzymes of agrobacterium tumefaciens
- Authors: Clark, Sally-Ann
- Date: 2003
- Subjects: Agrobacterium tumefaciens , Amino acids Hydantoin Enzymes
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4140 , http://hdl.handle.net/10962/d1016233
- Description: The production of enantiomerically pure amino acids is of industrial importance as they are used in the synthesis of a number of pharmaceuticals, insecticides and herbicides and biologically active peptides and hormones. A number of microorganisms have been identified which possess hydantoin hydrolysing enzymes that stereoselectively convert racemic hydantoins into anantiomerically pure amino acids. Consequently these microorganisms and their enzymes are sought after as biocatalysts for the production of amino acids. The isolation of novel hydantoin hydrolising enzymes with unique or improved biocatalytic characteristics is of importance for the development of potential biocatalysts to be used in the production of enantiomerically pure amino acids. The genes encoding an N-carbamoyl-amino acid amidohydrolase, an enzyme involved in the hydrolysis of hydantoin, was isolated by screening a genomic DNA library of Agrobacterium tumefacience RU-AE01. Nucleotide sequence analysis of the region upstream of this gene revealed a fragment of a gene encoding the hydantoinase enzyme. I this study, a DNA probe consisting of the gene encoding the N-carbamoyl amino acid amidohydrolase, on a large enough fragment of the genomic DNA library which would allow for the simultaneous isolation the hydantoinase gene located upstream. Recombinant expression of the genes encoding hydantoin hydrolysing enzymes has been used to facilitate the production and purification of these enzymes for their use as biocatalysts. Two genes (ncaR1 and ncaR2) encoding different N-carbamoyl-amino acid amidohydrolases with distinct nucleotide and deduced amino acid sequences were isolated from the genome of A, tumefaciens RU-OR. In this study, the heterologous expression of ncaR1 and ncaR2 was explored. Investigation into the optimisation of the heterologous expression of ncaR1 showed that reducing the growth temperature of the recombinant E. coli producing NcaR1 resulted in a two-fold increase in N-carbamoyl-amino acid amidohydrolase activity and solubility. Furthermore, NcaR1 was produced with a C-terminal 6xHis tag, but NcaR1-6xHis did not possess N-carbamoyl amino acid amidohydrolase activity. Furthermore, purification of NcaR-6xHis under native conditions using affinity chromatography performed, and used for the production of antibodies.
- Full Text:
- Date Issued: 2003
- Authors: Clark, Sally-Ann
- Date: 2003
- Subjects: Agrobacterium tumefaciens , Amino acids Hydantoin Enzymes
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4140 , http://hdl.handle.net/10962/d1016233
- Description: The production of enantiomerically pure amino acids is of industrial importance as they are used in the synthesis of a number of pharmaceuticals, insecticides and herbicides and biologically active peptides and hormones. A number of microorganisms have been identified which possess hydantoin hydrolysing enzymes that stereoselectively convert racemic hydantoins into anantiomerically pure amino acids. Consequently these microorganisms and their enzymes are sought after as biocatalysts for the production of amino acids. The isolation of novel hydantoin hydrolising enzymes with unique or improved biocatalytic characteristics is of importance for the development of potential biocatalysts to be used in the production of enantiomerically pure amino acids. The genes encoding an N-carbamoyl-amino acid amidohydrolase, an enzyme involved in the hydrolysis of hydantoin, was isolated by screening a genomic DNA library of Agrobacterium tumefacience RU-AE01. Nucleotide sequence analysis of the region upstream of this gene revealed a fragment of a gene encoding the hydantoinase enzyme. I this study, a DNA probe consisting of the gene encoding the N-carbamoyl amino acid amidohydrolase, on a large enough fragment of the genomic DNA library which would allow for the simultaneous isolation the hydantoinase gene located upstream. Recombinant expression of the genes encoding hydantoin hydrolysing enzymes has been used to facilitate the production and purification of these enzymes for their use as biocatalysts. Two genes (ncaR1 and ncaR2) encoding different N-carbamoyl-amino acid amidohydrolases with distinct nucleotide and deduced amino acid sequences were isolated from the genome of A, tumefaciens RU-OR. In this study, the heterologous expression of ncaR1 and ncaR2 was explored. Investigation into the optimisation of the heterologous expression of ncaR1 showed that reducing the growth temperature of the recombinant E. coli producing NcaR1 resulted in a two-fold increase in N-carbamoyl-amino acid amidohydrolase activity and solubility. Furthermore, NcaR1 was produced with a C-terminal 6xHis tag, but NcaR1-6xHis did not possess N-carbamoyl amino acid amidohydrolase activity. Furthermore, purification of NcaR-6xHis under native conditions using affinity chromatography performed, and used for the production of antibodies.
- Full Text:
- Date Issued: 2003
Implementing Location Services in the Location-Transparent, Distributed Environment of the Internet
- Clayton, Peter G, Preston, Michael, Wells, George C
- Authors: Clayton, Peter G , Preston, Michael , Wells, George C
- Date: 2003
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/430467 , vital:72693 , https://link.springer.com/book/10.1007/b13582?page=1#toc
- Description: This volume contains the papers presented at the 5th International Workshop on Advanced Parallel Processing Technologies, APPT 2003. This series of workshops is designed to strengthen the cooperation between the German and Chinese institutions active in the area of these technologies. It has continued to grow, providing an excellent forum for reporting advances in parallel processing technologies. The 5th workshop itself addressed the entire gamut of related topics, ranging from the architectural aspects of parallel computer hardware and system software to the applied technologies for novel applica-tions. For this workshop, we received over 191 full submissions from researchers all over the world. All the papers were peer-reviewed in depth and qualitatively graded on their relevance, originality, signi?cance, presentation, and the overall appropriateness for their acceptance. Any concerns raised were discussed in the program com-mittee. The organizing committee did an excellent job in selecting 78 papers (Among them, 21 were short ones) for presentation. In short, the papers included here represent the forefront of research from China, Germany, and the other countries.
- Full Text:
- Date Issued: 2003
- Authors: Clayton, Peter G , Preston, Michael , Wells, George C
- Date: 2003
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/430467 , vital:72693 , https://link.springer.com/book/10.1007/b13582?page=1#toc
- Description: This volume contains the papers presented at the 5th International Workshop on Advanced Parallel Processing Technologies, APPT 2003. This series of workshops is designed to strengthen the cooperation between the German and Chinese institutions active in the area of these technologies. It has continued to grow, providing an excellent forum for reporting advances in parallel processing technologies. The 5th workshop itself addressed the entire gamut of related topics, ranging from the architectural aspects of parallel computer hardware and system software to the applied technologies for novel applica-tions. For this workshop, we received over 191 full submissions from researchers all over the world. All the papers were peer-reviewed in depth and qualitatively graded on their relevance, originality, signi?cance, presentation, and the overall appropriateness for their acceptance. Any concerns raised were discussed in the program com-mittee. The organizing committee did an excellent job in selecting 78 papers (Among them, 21 were short ones) for presentation. In short, the papers included here represent the forefront of research from China, Germany, and the other countries.
- Full Text:
- Date Issued: 2003
An evaluation of the Xenopus laevis liver slice model to study the toxic effects of microcystin
- Authors: Coates, Nadya
- Date: 2003
- Subjects: Zenopus laevis , Microcystis aeruginosa -- Toxicology
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11069 , http://hdl.handle.net/10948/307 , Zenopus laevis , Microcystis aeruginosa -- Toxicology
- Description: Blooms of cyanobacteria have increased in occurrence in the past three decades and have been reported to cause severe problems for animals and humans, leading to death in extreme instances. The majority of poisonings that have taken place have been attributed to a hepatotoxin produced by the species Microcystis aeruginosa, namely microcystin. The appearance of a cyanobacterial bloom does not give any indication as to its toxicity and therefore, it is imperative that simple, yet sensitive, bioassays are developed to overcome this problem. This study was undertaken to evaluate the effects of microcystin-LR on the liver of Xenopus laevis both in vitro and in vivo. This animal provides an opportunity to study the long-term hepatotoxic effects of the toxin compared to in vitro studies performed with mice and rats. The use of the liver slice model system as a potential bioassay to study the effects of microcystin-LR on Xenopus laevis liver was evaluated. Liver slices were cultured in RPMI- 1640 culture medium for periods ranging from 30 hours to 10 days and the liver slices were exposed to toxin concentrations ranging from 1nM to 500nM. The use of frog liver slices to study the longer-term effects of low-dose exposure to microcystin-LR was evaluated by observing the ultrastructural changes within hepatocytes using transmission electron microscopy, the release of the enzymes alanine aminotransferase and lactate dehydrogenase into the surrounding culture medium, as well as using a 3-[4,5-dimethylthiazol-2yl]-2,5- diphenyl tetrazolium bromide assay to determine the viability of the liver slices in culture. The amount of lipid peroxidation in the liver slices after exposure to microcystin-LR was assessed using the Thiobarbituric Acid Test. Results showed the frog liver slice culture system to be an inadequate method to evaluate the hepatotoxic effects of microcystin-LR. An in vivo assessment of the effects of microcystin-LR on Xenopus laevis was carried out using a total of 9 frogs (3 groups of 3 frogs). Frogs received a single intraperitoneal dose of 120mg/kg of microcystin-LR and were sacrificed at 8 and 24 hours post exposure. Microcystin-LR caused no significant change in serum lactate dehydrogenase levels, hepatosomatic index (liver weight as a percentage body weight), glutathione peroxidase activity, glycogen or lipid peroxidation. There was, however, an increase in glutathione sii transferase activity in the liver. The presence of the toxin in the liver was confirmed by immunohistochemistry. This study suggests that Xenopus laevis has, in some way, adapted to detoxifying aquatic toxins in the environment.
- Full Text:
- Date Issued: 2003
- Authors: Coates, Nadya
- Date: 2003
- Subjects: Zenopus laevis , Microcystis aeruginosa -- Toxicology
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11069 , http://hdl.handle.net/10948/307 , Zenopus laevis , Microcystis aeruginosa -- Toxicology
- Description: Blooms of cyanobacteria have increased in occurrence in the past three decades and have been reported to cause severe problems for animals and humans, leading to death in extreme instances. The majority of poisonings that have taken place have been attributed to a hepatotoxin produced by the species Microcystis aeruginosa, namely microcystin. The appearance of a cyanobacterial bloom does not give any indication as to its toxicity and therefore, it is imperative that simple, yet sensitive, bioassays are developed to overcome this problem. This study was undertaken to evaluate the effects of microcystin-LR on the liver of Xenopus laevis both in vitro and in vivo. This animal provides an opportunity to study the long-term hepatotoxic effects of the toxin compared to in vitro studies performed with mice and rats. The use of the liver slice model system as a potential bioassay to study the effects of microcystin-LR on Xenopus laevis liver was evaluated. Liver slices were cultured in RPMI- 1640 culture medium for periods ranging from 30 hours to 10 days and the liver slices were exposed to toxin concentrations ranging from 1nM to 500nM. The use of frog liver slices to study the longer-term effects of low-dose exposure to microcystin-LR was evaluated by observing the ultrastructural changes within hepatocytes using transmission electron microscopy, the release of the enzymes alanine aminotransferase and lactate dehydrogenase into the surrounding culture medium, as well as using a 3-[4,5-dimethylthiazol-2yl]-2,5- diphenyl tetrazolium bromide assay to determine the viability of the liver slices in culture. The amount of lipid peroxidation in the liver slices after exposure to microcystin-LR was assessed using the Thiobarbituric Acid Test. Results showed the frog liver slice culture system to be an inadequate method to evaluate the hepatotoxic effects of microcystin-LR. An in vivo assessment of the effects of microcystin-LR on Xenopus laevis was carried out using a total of 9 frogs (3 groups of 3 frogs). Frogs received a single intraperitoneal dose of 120mg/kg of microcystin-LR and were sacrificed at 8 and 24 hours post exposure. Microcystin-LR caused no significant change in serum lactate dehydrogenase levels, hepatosomatic index (liver weight as a percentage body weight), glutathione peroxidase activity, glycogen or lipid peroxidation. There was, however, an increase in glutathione sii transferase activity in the liver. The presence of the toxin in the liver was confirmed by immunohistochemistry. This study suggests that Xenopus laevis has, in some way, adapted to detoxifying aquatic toxins in the environment.
- Full Text:
- Date Issued: 2003
The suspension of mastery and the desire for imaginary : applying Jacques Lacan's theory of the imaginary to the beholder/image dialectic as realised in selected paintings by Lucy Cobern and Gerhard Richter
- Authors: Cobern, Lucy Rebecca
- Date: 2013-05-21
- Subjects: Lacan, Jacques, 1901-1981 -- Criticism and interpretation Richter, Gerhard, 1932- -- Criticism and interpretation
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3174 , http://hdl.handle.net/10962/d1007806
- Description: This dissertation seeks to explore the nature of the self/other, subject/object dialectic that can be found in Jacques Lacan's theory of the Minor Stage and his notion of Imaginary mastery, and how this relationship can be re-read in terms of a beholder/image relationship. What I seek to demonstrate in exploring the relationship between the beholder and the image is the staging of two opposing emotions, aggression and desire and the consequential tussle for mastery that arises from the self/other, and hence the beholder/image, dichotomy. I seek to explore the reasons why such a beholder/image relationship becomes ambivalent, due to veiled, obscured and fragmented images. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Authors: Cobern, Lucy Rebecca
- Date: 2013-05-21
- Subjects: Lacan, Jacques, 1901-1981 -- Criticism and interpretation Richter, Gerhard, 1932- -- Criticism and interpretation
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3174 , http://hdl.handle.net/10962/d1007806
- Description: This dissertation seeks to explore the nature of the self/other, subject/object dialectic that can be found in Jacques Lacan's theory of the Minor Stage and his notion of Imaginary mastery, and how this relationship can be re-read in terms of a beholder/image relationship. What I seek to demonstrate in exploring the relationship between the beholder and the image is the staging of two opposing emotions, aggression and desire and the consequential tussle for mastery that arises from the self/other, and hence the beholder/image, dichotomy. I seek to explore the reasons why such a beholder/image relationship becomes ambivalent, due to veiled, obscured and fragmented images. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
A new broom sweeps clean: the economic and cultural value of grass brooms in the Eastern Cape Province, South Africa
- Cocks, Michelle L, Dold, Anthony P
- Authors: Cocks, Michelle L , Dold, Anthony P
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141382 , vital:37967 , DOI: 10.1080/14728028.2004.9752477
- Description: In southern Africa over the last twenty years, much attention has been given to the importance of NTFPs for rural livelihoods through their household consumption and sale. They have been classified as having either subsistence consumption or commercial values. These values are mostly related to their utilitarian functions, but recent studies show that NTFPs also hold strong cultural functions. Such cultural functions can play a role in both rural and urban livelihoods; consequently the values of NTFPs may be related to both utilitarian and cultural functions. This paper demonstrates the cultural functions of grass brooms in urban areas in South Africa and the impact of their trade on income generation in rural areas, and discusses the concept of culture as a significant factor in the understanding of the role of NTFPs in livelihoods, and their values.
- Full Text:
- Date Issued: 2012
- Authors: Cocks, Michelle L , Dold, Anthony P
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141382 , vital:37967 , DOI: 10.1080/14728028.2004.9752477
- Description: In southern Africa over the last twenty years, much attention has been given to the importance of NTFPs for rural livelihoods through their household consumption and sale. They have been classified as having either subsistence consumption or commercial values. These values are mostly related to their utilitarian functions, but recent studies show that NTFPs also hold strong cultural functions. Such cultural functions can play a role in both rural and urban livelihoods; consequently the values of NTFPs may be related to both utilitarian and cultural functions. This paper demonstrates the cultural functions of grass brooms in urban areas in South Africa and the impact of their trade on income generation in rural areas, and discusses the concept of culture as a significant factor in the understanding of the role of NTFPs in livelihoods, and their values.
- Full Text:
- Date Issued: 2012
The use of strategies to promote and market products and services online as well the use of customer relationship management to attract and retain customers
- Authors: Cohen, Howard
- Date: 2003
- Subjects: Internet marketing , Customer relations -- Management , Consumer satisfaction , Customer loyalty
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:10862 , http://hdl.handle.net/10948/270 , Internet marketing , Customer relations -- Management , Consumer satisfaction , Customer loyalty
- Description: The Internet has provided marketing with many new tools and given old tools new or improved meanings. The Net poses tremendous challenges for scholars in many lines of research, from usability studies and consumer behaviour research to marketing and advertising research. Because the World Wide Web (the Web) presents a fundamentally different environment for marketing activities than traditional media, conventional marketing activities are being transformed, as they are often difficult to implement in their present form. This means that in many cases these marketing activities have to be reconstructed in forms more appropriate for the new medium. A lot of technological changes have affected the marketing environment of today. Companies must adapt to these changes in order to improve their marketing strategies. This has, among other things, resulted in an emphasis on relationship marketing. The purpose of this thesis is to explore what strategies are used in practice by companies in order to market and promote their products and services by using their Web sites as well as to build effective Customer Relationship Management (CRM). In order to fulfil the research purpose, interviews were conducted at a number of companies (medium and large), and questionnaires were mailed to various companies in the motor retail industry. The result shows that a company can use traditional as well as online marketing and promotion strategies when conducting business. This can also help companies to gain better relations with their customers. The different marketing and promotion strategies are useful for attracting new business as well as maintaining and stimulating existing relations. The research problem addressed in this study was to determine the factors that are effective in marketing and promoting of Web sites as well as the methods used in building CRM.
- Full Text:
- Date Issued: 2003
- Authors: Cohen, Howard
- Date: 2003
- Subjects: Internet marketing , Customer relations -- Management , Consumer satisfaction , Customer loyalty
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:10862 , http://hdl.handle.net/10948/270 , Internet marketing , Customer relations -- Management , Consumer satisfaction , Customer loyalty
- Description: The Internet has provided marketing with many new tools and given old tools new or improved meanings. The Net poses tremendous challenges for scholars in many lines of research, from usability studies and consumer behaviour research to marketing and advertising research. Because the World Wide Web (the Web) presents a fundamentally different environment for marketing activities than traditional media, conventional marketing activities are being transformed, as they are often difficult to implement in their present form. This means that in many cases these marketing activities have to be reconstructed in forms more appropriate for the new medium. A lot of technological changes have affected the marketing environment of today. Companies must adapt to these changes in order to improve their marketing strategies. This has, among other things, resulted in an emphasis on relationship marketing. The purpose of this thesis is to explore what strategies are used in practice by companies in order to market and promote their products and services by using their Web sites as well as to build effective Customer Relationship Management (CRM). In order to fulfil the research purpose, interviews were conducted at a number of companies (medium and large), and questionnaires were mailed to various companies in the motor retail industry. The result shows that a company can use traditional as well as online marketing and promotion strategies when conducting business. This can also help companies to gain better relations with their customers. The different marketing and promotion strategies are useful for attracting new business as well as maintaining and stimulating existing relations. The research problem addressed in this study was to determine the factors that are effective in marketing and promoting of Web sites as well as the methods used in building CRM.
- Full Text:
- Date Issued: 2003
Waging war : discourses of HIV/AIDS in South African media
- Connelly, Mark, Macleod, Catriona I
- Authors: Connelly, Mark , Macleod, Catriona I
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6255 , http://hdl.handle.net/10962/d1007873
- Description: This paper explores a discourse of war against HIV/AIDS evident in the Daily Dispatch, a South African daily newspaper, from 1985 to 2000, and discusses the implications of this in terms of the way in which HIV/AIDS is constructed. The discursive framework of the war depends, fundamentally, on the personification of HIV/AIDS, in which agency is accorded to the virus, and which allows for its construction as the enemy. The war discourse positions different groups of subjects (the diseased body, the commanders, the experts, the ordinary citizens) in relations of power. The diseased body, which is the point of transmission, the polluter or infector, is cast as the 'Other', as a dark and threatening force. This takes on racialised overtones. The government takes on the role of commander, directing the war through policy and intervention strategies. Opposition to government is couched in a struggle discourse that dove-tails with the overall framework of war. Medical and scientific understandings pre-dominate in the investigative practices and expert commentary on the war, with alternative voices (such as those of people living with HIV/AIDS) being silenced. The ordinary citizen is incited to take on prevention and caring roles with a strong gendered overlay.
- Full Text:
- Date Issued: 2003
- Authors: Connelly, Mark , Macleod, Catriona I
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6255 , http://hdl.handle.net/10962/d1007873
- Description: This paper explores a discourse of war against HIV/AIDS evident in the Daily Dispatch, a South African daily newspaper, from 1985 to 2000, and discusses the implications of this in terms of the way in which HIV/AIDS is constructed. The discursive framework of the war depends, fundamentally, on the personification of HIV/AIDS, in which agency is accorded to the virus, and which allows for its construction as the enemy. The war discourse positions different groups of subjects (the diseased body, the commanders, the experts, the ordinary citizens) in relations of power. The diseased body, which is the point of transmission, the polluter or infector, is cast as the 'Other', as a dark and threatening force. This takes on racialised overtones. The government takes on the role of commander, directing the war through policy and intervention strategies. Opposition to government is couched in a struggle discourse that dove-tails with the overall framework of war. Medical and scientific understandings pre-dominate in the investigative practices and expert commentary on the war, with alternative voices (such as those of people living with HIV/AIDS) being silenced. The ordinary citizen is incited to take on prevention and caring roles with a strong gendered overlay.
- Full Text:
- Date Issued: 2003
The nature and potential effect of the Labour Relations Amendment Act 2002
- Authors: Conroy, Andrew Geddes
- Date: 2003
- Subjects: South Africa. Labour Relations Amendment Act 2002 , Labor laws and legislation -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:11037 , http://hdl.handle.net/10948/292 , South Africa. Labour Relations Amendment Act 2002 , Labor laws and legislation -- South Africa
- Description: It took 18 months of intensive negotiation at the Millennium Labour Council, NEDLAC and the Labour Portfolio Committee before the Labour Relations Amendment Act of 20021 completed its passage through Parliament, taking effect on 1 August 2002. Fifty-seven amendments to specific sections of the Labour Relations Act2 and its schedules cure some obvious anomalies in the original version. It is further apparent that the legislature has taken cognisance of the observations by judges and arbitrators, who voiced their criticism in respect of certain aspects of the original "Act". The amended "Act"3 does appear to be a genuine commitment by both business and organised labour to improve efficiency in the labour market, to promote employment creation and to protect vulnerable workers. Improved dispute resolution mechanisms, enforcement mechanisms and the resurgence of an unfettered discretion in awarding compensation go some way to improving the application of the "Act". The most dramatic amendments have taken place in the law regulating retrenchments by large employers, inclusive of the controversial introduction of a right to strike after retrenchments of this nature have been effected, and the regulation of the transfer of a business as a going concern and its impact on workers. Critics indicate that business and organised labour have subscribed to the package of amendments despite respective reservations and due to certain time constraints. The nett result is a package of amendments that could be described as failing to address, in certain respects, or intentionally overlooking, areas of the "Act" that have traditionally been shown wanting in the past. In the individual employment law sphere specifically, the failure to address the meaning of "benefits" in the definition of unfair labour practices; to allocate a precise meaning to the concept of the transfer of a going concern; or to regulate the conduct of employers when transferring employees, remain some of the areas for concern. It appears that the legislature has decided that certain issues should be resolved by the Labour Court, and ultimately the Labour Appeal Court, on a case-by-case basis rather than by legislative intervention. Whilst this approach has merit, it does present problems to those seeking to apply the provisions of the amended "Act" 5 in everyday practice. On the whole, the amendments do not, nor were they designed to, mark a major shift in the government's labour market policy. The changes clearly focus on correcting and clarifying sections of the "Act", which have resulted in unintended consequences, or lost touch with commercial reality, over the past seven years.
- Full Text:
- Date Issued: 2003
- Authors: Conroy, Andrew Geddes
- Date: 2003
- Subjects: South Africa. Labour Relations Amendment Act 2002 , Labor laws and legislation -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:11037 , http://hdl.handle.net/10948/292 , South Africa. Labour Relations Amendment Act 2002 , Labor laws and legislation -- South Africa
- Description: It took 18 months of intensive negotiation at the Millennium Labour Council, NEDLAC and the Labour Portfolio Committee before the Labour Relations Amendment Act of 20021 completed its passage through Parliament, taking effect on 1 August 2002. Fifty-seven amendments to specific sections of the Labour Relations Act2 and its schedules cure some obvious anomalies in the original version. It is further apparent that the legislature has taken cognisance of the observations by judges and arbitrators, who voiced their criticism in respect of certain aspects of the original "Act". The amended "Act"3 does appear to be a genuine commitment by both business and organised labour to improve efficiency in the labour market, to promote employment creation and to protect vulnerable workers. Improved dispute resolution mechanisms, enforcement mechanisms and the resurgence of an unfettered discretion in awarding compensation go some way to improving the application of the "Act". The most dramatic amendments have taken place in the law regulating retrenchments by large employers, inclusive of the controversial introduction of a right to strike after retrenchments of this nature have been effected, and the regulation of the transfer of a business as a going concern and its impact on workers. Critics indicate that business and organised labour have subscribed to the package of amendments despite respective reservations and due to certain time constraints. The nett result is a package of amendments that could be described as failing to address, in certain respects, or intentionally overlooking, areas of the "Act" that have traditionally been shown wanting in the past. In the individual employment law sphere specifically, the failure to address the meaning of "benefits" in the definition of unfair labour practices; to allocate a precise meaning to the concept of the transfer of a going concern; or to regulate the conduct of employers when transferring employees, remain some of the areas for concern. It appears that the legislature has decided that certain issues should be resolved by the Labour Court, and ultimately the Labour Appeal Court, on a case-by-case basis rather than by legislative intervention. Whilst this approach has merit, it does present problems to those seeking to apply the provisions of the amended "Act" 5 in everyday practice. On the whole, the amendments do not, nor were they designed to, mark a major shift in the government's labour market policy. The changes clearly focus on correcting and clarifying sections of the "Act", which have resulted in unintended consequences, or lost touch with commercial reality, over the past seven years.
- Full Text:
- Date Issued: 2003
Disgraceland: history and the humanities in frontier country
- Authors: Cornwell, Gareth D N
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6117 , http://hdl.handle.net/10962/d1004618
- Description: This paper explores the significance of Coetzee's choice of Salem in the Eastern Cape as the (part) setting for his novel Disgrace. A determinedly local and historical reading of the text suggests that Lucy's conduct represents an "ideal" solution to the historical issues of wrong and reparation raised in the novel. This finding is scrutinized through a reading of "The Humanities in Africa" from Elizabeth Costello, and it is concluded that whatever hope for rehabilitation or redemption the novel holds out for white South Africans necessarily exists beyond the discourse of the humanities, indeed, outside of history itself.
- Full Text:
- Date Issued: 2003
- Authors: Cornwell, Gareth D N
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6117 , http://hdl.handle.net/10962/d1004618
- Description: This paper explores the significance of Coetzee's choice of Salem in the Eastern Cape as the (part) setting for his novel Disgrace. A determinedly local and historical reading of the text suggests that Lucy's conduct represents an "ideal" solution to the historical issues of wrong and reparation raised in the novel. This finding is scrutinized through a reading of "The Humanities in Africa" from Elizabeth Costello, and it is concluded that whatever hope for rehabilitation or redemption the novel holds out for white South Africans necessarily exists beyond the discourse of the humanities, indeed, outside of history itself.
- Full Text:
- Date Issued: 2003
An investigation into the neuroprotective properties of curcumin
- Authors: Daniel, Sheril
- Date: 2003
- Subjects: Turmeric -- Therapeutic use , Nervous system -- Degeneration -- Prevention
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3753 , http://hdl.handle.net/10962/d1003231 , Turmeric -- Therapeutic use , Nervous system -- Degeneration -- Prevention
- Description: An increasing number of studies show that nutritional antioxidants such as vitamin E and polyphenols are capable of blocking neuronal death in vitro and may have therapeutic properties in animal models of neurodegenerative diseases including Alzheimer’s and Parkinson’s diseases. In the present study, the neuroprotective ability of one such polyphenolic antioxidant, curcumin, was investigated. Curcumin is the yellow curry spice derived from turmeric, and is widely used as a dietary component and herbal medicine in India. Most neurological disorders are postulated to have an oxidative or excitototoxic basis. Thus the effects of curcumin on oxidative stress in the rat brain were investigated. Curcumin, administered to the rat in vivo and in vitro, was able to exert protective effects on oxidative damage in the brain, induced by cyanide, a mitochondrial inhibitor. Curcumin also offered protection against quinolinic acid induced lipid peroxidation, and this protection was extended to lipid peroxidation induced by metals such as lead and cadmium in the rat brain. Experiments conducted on the pineal gland revealed an increased production of the neuroprotective hormone melatonin in presence of curcumin in vivo. The hippocampus is functionally related to vital behaviour and intellectual activities and is known to be a primary target for neuronal degeneration in the brains of patients with Alzheimer’s disease. Histological studies were undertaken to assess the effects of curcumin on lead induced toxicity on the rat hippocampus, the results of which show that curcumin affords significant protection to the hippocampus of the lead treated rats. This study also sought to elucidate possible mechanisms by which curcumin exerts its neuroprotective capabilities. Curcumin was found to inhibit the action of cyanide on the mitochondrial electron transport chain, one of the most common sources of free radicals. Electrochemical, UV/VIS and Infrared spectroscopy were used to characterise interactions between curcumin and the metals lead, cadmium, iron (II) and iron (III). Curcumin was shown to directly chelate these metals with the formation and isolation of two new curcumin complexes with lead, and one complex each with cadmium and iron (III). These results suggest chelation of toxic metals as a mechanism of neuroprotection afforded by curcumin. The need for neuroprotective agents is urgent considering the rapid rise in the elderly population and the proportionate increase in neurological disorders. The findings of this study indicate that curcumin, a well-established dietary antioxidant, is capable of playing a bigger role in neuroprotection, which needs to be further explored and exploited.
- Full Text:
- Date Issued: 2003
- Authors: Daniel, Sheril
- Date: 2003
- Subjects: Turmeric -- Therapeutic use , Nervous system -- Degeneration -- Prevention
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3753 , http://hdl.handle.net/10962/d1003231 , Turmeric -- Therapeutic use , Nervous system -- Degeneration -- Prevention
- Description: An increasing number of studies show that nutritional antioxidants such as vitamin E and polyphenols are capable of blocking neuronal death in vitro and may have therapeutic properties in animal models of neurodegenerative diseases including Alzheimer’s and Parkinson’s diseases. In the present study, the neuroprotective ability of one such polyphenolic antioxidant, curcumin, was investigated. Curcumin is the yellow curry spice derived from turmeric, and is widely used as a dietary component and herbal medicine in India. Most neurological disorders are postulated to have an oxidative or excitototoxic basis. Thus the effects of curcumin on oxidative stress in the rat brain were investigated. Curcumin, administered to the rat in vivo and in vitro, was able to exert protective effects on oxidative damage in the brain, induced by cyanide, a mitochondrial inhibitor. Curcumin also offered protection against quinolinic acid induced lipid peroxidation, and this protection was extended to lipid peroxidation induced by metals such as lead and cadmium in the rat brain. Experiments conducted on the pineal gland revealed an increased production of the neuroprotective hormone melatonin in presence of curcumin in vivo. The hippocampus is functionally related to vital behaviour and intellectual activities and is known to be a primary target for neuronal degeneration in the brains of patients with Alzheimer’s disease. Histological studies were undertaken to assess the effects of curcumin on lead induced toxicity on the rat hippocampus, the results of which show that curcumin affords significant protection to the hippocampus of the lead treated rats. This study also sought to elucidate possible mechanisms by which curcumin exerts its neuroprotective capabilities. Curcumin was found to inhibit the action of cyanide on the mitochondrial electron transport chain, one of the most common sources of free radicals. Electrochemical, UV/VIS and Infrared spectroscopy were used to characterise interactions between curcumin and the metals lead, cadmium, iron (II) and iron (III). Curcumin was shown to directly chelate these metals with the formation and isolation of two new curcumin complexes with lead, and one complex each with cadmium and iron (III). These results suggest chelation of toxic metals as a mechanism of neuroprotection afforded by curcumin. The need for neuroprotective agents is urgent considering the rapid rise in the elderly population and the proportionate increase in neurological disorders. The findings of this study indicate that curcumin, a well-established dietary antioxidant, is capable of playing a bigger role in neuroprotection, which needs to be further explored and exploited.
- Full Text:
- Date Issued: 2003
The effect of human soluble FceRII on the RPMI 8866 B-Lymphoblastoid and the U937 Monocyte cell lines
- Authors: Daniels, Brodie Belinda
- Date: 2003
- Subjects: Developmental inmmunology , Cellular control mechanisms
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11084 , http://hdl.handle.net/10948/322 , Developmental inmmunology , Cellular control mechanisms
- Description: Due to the diverse functions of Fc eRII, such as its roles in cellular adhesion, growth and differentiation of B and T lymphocytes, rescue of B cells from apoptosis and release of cytotoxic mediators, it is clear why it is believed to be a central molecule in allergic response. Because of its important role in the regulation of IgE production, FceRII may be the primary cause of certain allergic conditions. This study attempted to express and purify a recombinant human soluble FceRII to test its effect on a B-lymphoblastoid (RPMI 8866) and a monocytic (U937) cell line. The protein was expressed in Escherichia coli inclusion bodies, before being refolded and purified in a single gel chromatography step. This pure protein was then tested for biological activity by testing its IgE binding func tion. Once proven functional, it was used to test its effect on the cell lines at three concentrations for its apoptotic rescue properties and its cytokine effects. The recombinant protein did not seem to have any significant effect on the apoptotic rescue of either cell line. While the recombinant sFceRII appeared to have a slight effect on the stimulation of IL-1ß and TNFa in the RPMI 8866 cells, there was no apparent effect on the production of NF?B. In U937 cells, the protein did not seem to have any effect on the stimulation of IL-1ß, TNFa or NF?B. However, the cytokine effects of the recombinant protein were tested on isolated PBMCs from a healthy individual and a hyper-IgE syndrome patient. The recombinant protein was able to stimulate the production of cytokines in both individuals’ PBMCs, proving that it has the same effect as the natural protein. The upregulation of these cytokines indicates that the recombinant protein is able to stimulate the immune system. Therefore, this recombinant soluble FceRII protein could possibly be used for immune therapy.
- Full Text:
- Date Issued: 2003
- Authors: Daniels, Brodie Belinda
- Date: 2003
- Subjects: Developmental inmmunology , Cellular control mechanisms
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11084 , http://hdl.handle.net/10948/322 , Developmental inmmunology , Cellular control mechanisms
- Description: Due to the diverse functions of Fc eRII, such as its roles in cellular adhesion, growth and differentiation of B and T lymphocytes, rescue of B cells from apoptosis and release of cytotoxic mediators, it is clear why it is believed to be a central molecule in allergic response. Because of its important role in the regulation of IgE production, FceRII may be the primary cause of certain allergic conditions. This study attempted to express and purify a recombinant human soluble FceRII to test its effect on a B-lymphoblastoid (RPMI 8866) and a monocytic (U937) cell line. The protein was expressed in Escherichia coli inclusion bodies, before being refolded and purified in a single gel chromatography step. This pure protein was then tested for biological activity by testing its IgE binding func tion. Once proven functional, it was used to test its effect on the cell lines at three concentrations for its apoptotic rescue properties and its cytokine effects. The recombinant protein did not seem to have any significant effect on the apoptotic rescue of either cell line. While the recombinant sFceRII appeared to have a slight effect on the stimulation of IL-1ß and TNFa in the RPMI 8866 cells, there was no apparent effect on the production of NF?B. In U937 cells, the protein did not seem to have any effect on the stimulation of IL-1ß, TNFa or NF?B. However, the cytokine effects of the recombinant protein were tested on isolated PBMCs from a healthy individual and a hyper-IgE syndrome patient. The recombinant protein was able to stimulate the production of cytokines in both individuals’ PBMCs, proving that it has the same effect as the natural protein. The upregulation of these cytokines indicates that the recombinant protein is able to stimulate the immune system. Therefore, this recombinant soluble FceRII protein could possibly be used for immune therapy.
- Full Text:
- Date Issued: 2003
The development of a science competency test for technikon students
- Authors: Davids, Samiega
- Date: 2003
- Subjects: Science -- Study and teaching (Higher) -- South Africa , Universities and colleges -- South Africa -- Entrance requirements , Port Elizabeth Technikon Entrance requirements
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:10782 , http://hdl.handle.net/10948/87 , Science -- Study and teaching (Higher) -- South Africa , Universities and colleges -- South Africa -- Entrance requirements , Port Elizabeth Technikon Entrance requirements
- Description: In the mid-1980’s institutions of higher learning were coerced by the South African government to admit students from all races. As a result, these institutions were confronted with the need to identify preparedness for higher learning, especially amongst the ex-Department of Education and Training (DET) learners. Grade 12 results were not a sufficient predictor for ex-DET learners, and a review of current admission criteria became a necessity. This study aims to develop a suitable science entry-level test to be used as a component of an existing test battery. The test battery is used as an admission tool by the Port Elizabeth Technikon to further assess first year applicants who do not meet the normal entrance requirements for a science course. The only requirement for further assessment being Grade 12 physical science. The science entry-level test consists of a list of validated science skills and knowledge to be used to assess the skills and knowledge mastered at the time of test taking. On the basis of test scores, an assessment is made regarding the applicant’s preparedness for higher learning. This study holds the view that preparedness in students for higher learning in science can be measured by means of valid science competencies. In addition, knowledge of the level of preparedness of the applicant enables further educational support and guidance to be provided where necessary. Research which measures manifest academic ability rather than potential to learn is favoured since it is believed that the former generates psychometric evidence of that which was already mastered academically whilst the latter determines whether the student will be able to achieve under ideal conditions. The content covered by the proposed Science Competency Test was sanctioned by technikon lecturers of first year physics and chemistry courses. The content was taken from the examinable section of the Grade 11 and 12 physical science syllabi. This content is the most acceptable and fair knowledge-base a prospective science student can be expected to have mastered at school. The content was limited to those skills and knowledge believed by the lecturers to contribute to academic success in the first year. Items that tested this content were compiled and pilot tests were administered to Grade 12 physical science learners at various disadvantaged schools. The Science Competency Test was compiled from the pool of trial items after the performance of the items was statistically determined. This final Science Competency Test was completed by a sample of 179 first-time first year science students. The findings of the study were inconclusive as the Science Competency Test showed a moderate predictive ability for only one section of the sample. It further showed that the weighted matric score, WMS was not a significant predictor of future academic performance of the sample either. A discrepancy in performance amongst learners of different home languages and educational backgrounds was also noted.
- Full Text:
- Date Issued: 2003
- Authors: Davids, Samiega
- Date: 2003
- Subjects: Science -- Study and teaching (Higher) -- South Africa , Universities and colleges -- South Africa -- Entrance requirements , Port Elizabeth Technikon Entrance requirements
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:10782 , http://hdl.handle.net/10948/87 , Science -- Study and teaching (Higher) -- South Africa , Universities and colleges -- South Africa -- Entrance requirements , Port Elizabeth Technikon Entrance requirements
- Description: In the mid-1980’s institutions of higher learning were coerced by the South African government to admit students from all races. As a result, these institutions were confronted with the need to identify preparedness for higher learning, especially amongst the ex-Department of Education and Training (DET) learners. Grade 12 results were not a sufficient predictor for ex-DET learners, and a review of current admission criteria became a necessity. This study aims to develop a suitable science entry-level test to be used as a component of an existing test battery. The test battery is used as an admission tool by the Port Elizabeth Technikon to further assess first year applicants who do not meet the normal entrance requirements for a science course. The only requirement for further assessment being Grade 12 physical science. The science entry-level test consists of a list of validated science skills and knowledge to be used to assess the skills and knowledge mastered at the time of test taking. On the basis of test scores, an assessment is made regarding the applicant’s preparedness for higher learning. This study holds the view that preparedness in students for higher learning in science can be measured by means of valid science competencies. In addition, knowledge of the level of preparedness of the applicant enables further educational support and guidance to be provided where necessary. Research which measures manifest academic ability rather than potential to learn is favoured since it is believed that the former generates psychometric evidence of that which was already mastered academically whilst the latter determines whether the student will be able to achieve under ideal conditions. The content covered by the proposed Science Competency Test was sanctioned by technikon lecturers of first year physics and chemistry courses. The content was taken from the examinable section of the Grade 11 and 12 physical science syllabi. This content is the most acceptable and fair knowledge-base a prospective science student can be expected to have mastered at school. The content was limited to those skills and knowledge believed by the lecturers to contribute to academic success in the first year. Items that tested this content were compiled and pilot tests were administered to Grade 12 physical science learners at various disadvantaged schools. The Science Competency Test was compiled from the pool of trial items after the performance of the items was statistically determined. This final Science Competency Test was completed by a sample of 179 first-time first year science students. The findings of the study were inconclusive as the Science Competency Test showed a moderate predictive ability for only one section of the sample. It further showed that the weighted matric score, WMS was not a significant predictor of future academic performance of the sample either. A discrepancy in performance amongst learners of different home languages and educational backgrounds was also noted.
- Full Text:
- Date Issued: 2003
The development of a model of competencies for small, medium and microsized enterprises (SMME'S) to achieve competitive advantage in the East Cape Motor Industry Cluster
- Authors: De Beer, Lloyd
- Date: 2003
- Subjects: Business enterprises -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:10854 , http://hdl.handle.net/10948/121 , Business enterprises -- South Africa -- Eastern Cape
- Description: The research problem addressed in this study was to identify the generic strategies that small, medium and micro enterprises (SMME’s) are required to implement in order to achieve competitive advantage in the highly competitive global automotive market. Markets have merged into one huge global marketplace, increasing the competitive forces on all the participants in the automotive markets. Strategies to achieve competitive advantage has changed from the traditional domestic strategies to that of strategies required for global competitive advantage. This has created challenges for SMME’s to attain competitive advantage essential in the fast-changing global markets. The East Cape Motor Industry Cluster (ECMIC) is the heart of the SA automotive industry with three of the major automobile manufacturers having their assembly plants located in the Buffalo and Nelson Mandela Metropoles. A significant number of component manufacturers and their suppliers serve these manufacturers, as well as the other automobile manufacturers located elsewhere in South Africa. Many of these component manufacturers and suppliers are SMME’s. The need to become globally competitive is thus critical for SMME’s in the region. This study investigates the generic strategies that SMME organisations are required to implement in order to achieve competitive advantage in the ECMIC, and based on this and the empirical study that seeks opinion from management of SMME firms in the ECMIC, a model of generic strategies to create competitive advantage is developed.
- Full Text:
- Date Issued: 2003
- Authors: De Beer, Lloyd
- Date: 2003
- Subjects: Business enterprises -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:10854 , http://hdl.handle.net/10948/121 , Business enterprises -- South Africa -- Eastern Cape
- Description: The research problem addressed in this study was to identify the generic strategies that small, medium and micro enterprises (SMME’s) are required to implement in order to achieve competitive advantage in the highly competitive global automotive market. Markets have merged into one huge global marketplace, increasing the competitive forces on all the participants in the automotive markets. Strategies to achieve competitive advantage has changed from the traditional domestic strategies to that of strategies required for global competitive advantage. This has created challenges for SMME’s to attain competitive advantage essential in the fast-changing global markets. The East Cape Motor Industry Cluster (ECMIC) is the heart of the SA automotive industry with three of the major automobile manufacturers having their assembly plants located in the Buffalo and Nelson Mandela Metropoles. A significant number of component manufacturers and their suppliers serve these manufacturers, as well as the other automobile manufacturers located elsewhere in South Africa. Many of these component manufacturers and suppliers are SMME’s. The need to become globally competitive is thus critical for SMME’s in the region. This study investigates the generic strategies that SMME organisations are required to implement in order to achieve competitive advantage in the ECMIC, and based on this and the empirical study that seeks opinion from management of SMME firms in the ECMIC, a model of generic strategies to create competitive advantage is developed.
- Full Text:
- Date Issued: 2003
'n Ontleding van landboutourisme in die Tuinroete-gebied van Suid-Afrika
- Authors: De Jager, Jacobus Lodevicus
- Date: 2003
- Subjects: Tourism -- South Africa -- Garden Route , Farms -- Recreational use -- South Africa -- Garden Route
- Language: Afrikaans
- Type: Thesis , Masters , MTech (Agricultural Management)
- Identifier: vital:10954 , http://hdl.handle.net/10948/137 , Tourism -- South Africa -- Garden Route , Farms -- Recreational use -- South Africa -- Garden Route
- Description: The aim of this study was to create a profile of the agricultural tourism industry in the Garden Route area of South Africa, and to determine what general influence agricultural tourism has on the macro environment (rural area) with regard to socio- economic development, as ell as on the micro environment (farm) with regard to the generating of additional income. This study only includes agricultural operations (farms) in the Garden Route area that practice tourism activities. Out of 54 potential agricultural units that were identified, 46 were willing to participate in the study. Information from only 40 of the abovementioned units was finally included in this study. Six agricultural units could not supply sufficient information during the surveys. Data were gathered by means of a scientifically compiled questionnaire. All the individuals involved in this study completed this questionnaire by means of a personal interview. The aspects investigated in order to compile a profile were the characteristics of the suppliers, activities and the extent of the agricultural tourism industry. In order to determine the contribution of agricultural tourism on micro- and macro levels, aspects such as the contribution to farming turnover were investigated as well as the socioeconomic contribution in view of the infrastructure development, job creation, education and housing. The results of this study indicate that 78% of respondents are aged 40 years and older, are mainly male, and, in most of the cases, married (95%). Agricultural tourism enterprises in the Garden Route area are, in most cases (60%), managed by the farmers’ wives. The business type whereby respondents’ agricultural tourism enterprises are conducted, is as follows: in 72.5% of the cases a sole ownership, 17.5% a private company, 5% a partnership, 2.5% a closed corporation and the other remaining 2.5% is managed as a trust. The majority (65%) of persons involved in the management of the agricultural tourism enterprise has received some form of tertiary education. A degree of statistical significance (p = 0.0728) exists between the education level of the type of person/persons that manages the tourist branches and the type of activity category that is offered. In 65% of the cases the farms that offered agricultural tourism, were smaller than 500 hectare. A negative correlation (r² = -0.31700; p<0.0001) was found between farm size and the total farming turnover per year. This trend is even more distinctive (r² = -0.47156; p<0.0001) for farms smaller than 1 000 ha. A statistically meaningful (p = 0.0115) relationship exists between farm size and the number of activities that were offered. This occured in cases where farms were smaller than 1 000 ha. In 25% of the cases only one agricultural tourism activity was offered, 12.5% of these farms were 100 ha or smaller. The maximum number of activities that were offered was 11 and it was found in 3.13% of the cases. A highly statistically meaningful (p = <0.0001) connection exists between the percentage tourism turnover per year and the different types of activity categories that were offered. In 35.75% of the cases these activity categories earned between 1 and 10% of the yearly tourism turnover. A highly statistically meaningful (p = 0.0036) connection also exists between the degree of popularity and the type of activity category that was offered. In 53.07% of the cases the most popular activities were those that are nature-based, followed by accommodation-based activities (23.46%). In 82.5% of the cases additional income was the main reason for offering agricultural tourism. Other distinctive reasons were the love for people (50%) and the desire to share the farm life and beauty with others (25%). The tourism activities that were offered on the farms were respectively, guest houses (62.5%) followed by hiking trails (57.5%) and swimming opportunities (32.5%). Wildlife viewing was the activity that has been offered for the longest period of time, some 11,5 years. The general location of the agricultural tourism operations were 21.9 km from towns and 9.65 km from main routes. Word-of-mouth was the most successful marketing method, followed by the use of own brochures (90%) and local tourism bureau brochures (87.5%). A degree of statistical significance (p = 0.0902) exists between the number of marketing methods and the average percentage of the tourism branch as a total part of the total farming turnover per year. A positive correlation (r² = 0.29118; p<0.0001) exists between the number of marketing methods and the total farming turnover per year. Visitors to the agriculture tourism operations were in 55% of the cases mainly domestic tourists, followed by 25% that includes both domestic and foreign tourists, and a further 20% that mainly includes foreign tourists. The majority (67.5%) of operations indicated that agricultural tourism formed less than 30% (between 2% and 30%) of their annual agricultural turnover, 5% between 30% - 50%, 25% between 80% - 100% of their turnover, while 2.5% generated no income from agricultural tourism. A highly statistically meaningful (p = 0.0010) relationship exists between the percentages that the tourism branch contributes as a total of the farming turnover per year and the number of years that the respondents hade been involved in the offering of agricultural tourism. A positive correlation (r² = 0.30005; p<0.0001) exists between the number of years involved with the offering of agricultural tourism and the average percentage of the total farming turnover per year. New infrastructure was created by 40% of the providers, a further 12.5% partially created new infrastructure, while 47.5% made use of infrastructure that was already in place. Thus far job opportunities have been created for 58 people of whom 13.79% are male and 86.21% are female. A statistically meaningful (p = 0.0406) relationship exists between the number of workers that had to be appointed additionally and the number of activities that were offered. In 17.5% of the cases it was only needed to appoint one worker, followed by 2.5% that appointed three workers each, 5% that had to appoint four workers each and a further 2.5% that had to appoint seven workers each. There are 27.5% of agricultural tourism providers that had to appoint additional workers, 20% provided education to those workers and 36.36% of the above-mentioned provided housing to those workers and their dependants. A statistically meaningful (p = 0.0209) relationship exists between education provided to workers that had to be appointed additionally and the type of activity combination that was presented. A degree of statistical significance (p = 0.0691) exists between housing provided to additional workers and the number of activities that were presented. A statistically meaningful (p = 0.0455) relationship further exists between housing provided to workers that had to be appointed additionally and the type of activity combination that was presented. From the results of this study it appeared that the development of agricultural tourism in the Garden Route area has a positive impact on the micro- and macro environments of the rural areas. This impact can make a direct or indirect contribution to the socio-economic development of this region and it can induce the generation of additional income, infrastructure development, job creation, education and housing. This study suggests that there is significant potential for the further development and exploitation of agricultural tourism.
- Full Text:
- Date Issued: 2003
- Authors: De Jager, Jacobus Lodevicus
- Date: 2003
- Subjects: Tourism -- South Africa -- Garden Route , Farms -- Recreational use -- South Africa -- Garden Route
- Language: Afrikaans
- Type: Thesis , Masters , MTech (Agricultural Management)
- Identifier: vital:10954 , http://hdl.handle.net/10948/137 , Tourism -- South Africa -- Garden Route , Farms -- Recreational use -- South Africa -- Garden Route
- Description: The aim of this study was to create a profile of the agricultural tourism industry in the Garden Route area of South Africa, and to determine what general influence agricultural tourism has on the macro environment (rural area) with regard to socio- economic development, as ell as on the micro environment (farm) with regard to the generating of additional income. This study only includes agricultural operations (farms) in the Garden Route area that practice tourism activities. Out of 54 potential agricultural units that were identified, 46 were willing to participate in the study. Information from only 40 of the abovementioned units was finally included in this study. Six agricultural units could not supply sufficient information during the surveys. Data were gathered by means of a scientifically compiled questionnaire. All the individuals involved in this study completed this questionnaire by means of a personal interview. The aspects investigated in order to compile a profile were the characteristics of the suppliers, activities and the extent of the agricultural tourism industry. In order to determine the contribution of agricultural tourism on micro- and macro levels, aspects such as the contribution to farming turnover were investigated as well as the socioeconomic contribution in view of the infrastructure development, job creation, education and housing. The results of this study indicate that 78% of respondents are aged 40 years and older, are mainly male, and, in most of the cases, married (95%). Agricultural tourism enterprises in the Garden Route area are, in most cases (60%), managed by the farmers’ wives. The business type whereby respondents’ agricultural tourism enterprises are conducted, is as follows: in 72.5% of the cases a sole ownership, 17.5% a private company, 5% a partnership, 2.5% a closed corporation and the other remaining 2.5% is managed as a trust. The majority (65%) of persons involved in the management of the agricultural tourism enterprise has received some form of tertiary education. A degree of statistical significance (p = 0.0728) exists between the education level of the type of person/persons that manages the tourist branches and the type of activity category that is offered. In 65% of the cases the farms that offered agricultural tourism, were smaller than 500 hectare. A negative correlation (r² = -0.31700; p<0.0001) was found between farm size and the total farming turnover per year. This trend is even more distinctive (r² = -0.47156; p<0.0001) for farms smaller than 1 000 ha. A statistically meaningful (p = 0.0115) relationship exists between farm size and the number of activities that were offered. This occured in cases where farms were smaller than 1 000 ha. In 25% of the cases only one agricultural tourism activity was offered, 12.5% of these farms were 100 ha or smaller. The maximum number of activities that were offered was 11 and it was found in 3.13% of the cases. A highly statistically meaningful (p = <0.0001) connection exists between the percentage tourism turnover per year and the different types of activity categories that were offered. In 35.75% of the cases these activity categories earned between 1 and 10% of the yearly tourism turnover. A highly statistically meaningful (p = 0.0036) connection also exists between the degree of popularity and the type of activity category that was offered. In 53.07% of the cases the most popular activities were those that are nature-based, followed by accommodation-based activities (23.46%). In 82.5% of the cases additional income was the main reason for offering agricultural tourism. Other distinctive reasons were the love for people (50%) and the desire to share the farm life and beauty with others (25%). The tourism activities that were offered on the farms were respectively, guest houses (62.5%) followed by hiking trails (57.5%) and swimming opportunities (32.5%). Wildlife viewing was the activity that has been offered for the longest period of time, some 11,5 years. The general location of the agricultural tourism operations were 21.9 km from towns and 9.65 km from main routes. Word-of-mouth was the most successful marketing method, followed by the use of own brochures (90%) and local tourism bureau brochures (87.5%). A degree of statistical significance (p = 0.0902) exists between the number of marketing methods and the average percentage of the tourism branch as a total part of the total farming turnover per year. A positive correlation (r² = 0.29118; p<0.0001) exists between the number of marketing methods and the total farming turnover per year. Visitors to the agriculture tourism operations were in 55% of the cases mainly domestic tourists, followed by 25% that includes both domestic and foreign tourists, and a further 20% that mainly includes foreign tourists. The majority (67.5%) of operations indicated that agricultural tourism formed less than 30% (between 2% and 30%) of their annual agricultural turnover, 5% between 30% - 50%, 25% between 80% - 100% of their turnover, while 2.5% generated no income from agricultural tourism. A highly statistically meaningful (p = 0.0010) relationship exists between the percentages that the tourism branch contributes as a total of the farming turnover per year and the number of years that the respondents hade been involved in the offering of agricultural tourism. A positive correlation (r² = 0.30005; p<0.0001) exists between the number of years involved with the offering of agricultural tourism and the average percentage of the total farming turnover per year. New infrastructure was created by 40% of the providers, a further 12.5% partially created new infrastructure, while 47.5% made use of infrastructure that was already in place. Thus far job opportunities have been created for 58 people of whom 13.79% are male and 86.21% are female. A statistically meaningful (p = 0.0406) relationship exists between the number of workers that had to be appointed additionally and the number of activities that were offered. In 17.5% of the cases it was only needed to appoint one worker, followed by 2.5% that appointed three workers each, 5% that had to appoint four workers each and a further 2.5% that had to appoint seven workers each. There are 27.5% of agricultural tourism providers that had to appoint additional workers, 20% provided education to those workers and 36.36% of the above-mentioned provided housing to those workers and their dependants. A statistically meaningful (p = 0.0209) relationship exists between education provided to workers that had to be appointed additionally and the type of activity combination that was presented. A degree of statistical significance (p = 0.0691) exists between housing provided to additional workers and the number of activities that were presented. A statistically meaningful (p = 0.0455) relationship further exists between housing provided to workers that had to be appointed additionally and the type of activity combination that was presented. From the results of this study it appeared that the development of agricultural tourism in the Garden Route area has a positive impact on the micro- and macro environments of the rural areas. This impact can make a direct or indirect contribution to the socio-economic development of this region and it can induce the generation of additional income, infrastructure development, job creation, education and housing. This study suggests that there is significant potential for the further development and exploitation of agricultural tourism.
- Full Text:
- Date Issued: 2003
Effect of photoperiod on sexual development, growth and production of quail (coturnix coturnix japonica)
- Authors: De Jager, Pieter Herodes
- Date: 2003
- Subjects: Quails , Quails -- Growth , Quails -- Effect of light on , Photoperiodism
- Language: English
- Type: Thesis , Masters , MTech (Agricultural Management)
- Identifier: vital:10969 , http://hdl.handle.net/10948/227 , Quails , Quails -- Growth , Quails -- Effect of light on , Photoperiodism
- Description: The aim of the study was to determine the effect of photoperiod on production of quail in South Africa. Day old chicks were randomly divided into two groups. One group (n=74) received continuous light (LL) while the other group (n=77) received 13 h of light (LD) per day. Traits measured were sexual characteristics (age at sexual maturity and testis weight, egg production and egg weight) and growth (body weight) development in males and females respectively. Significant differences in growth existed between sexes; females were 171.44±17.15 and 182.91±17.75 g compared to the 151.77±13.20 and 155.00±16.86 g for males in both LL and LD groups respectively. Both males and females in the LL group initially outperformed the LD group in growth rate but, by day 72 the LD group had compensated and were 4.6% heavier than the LL group. A similar trend was observed for sexual maturity between the LL and LD groups. However, photoperiod did significantly influence initial egg production in favour of the LL group. The LL group had 80% of the females in production by day 44 compared to the 60% of the LD group. The initial egg weight of the LL group was 14 % higher than those of the LD group. Quail subjected to continuous light attained earlier sexual maturity and production with lower final weight compared to quail subjected to an intermediate photoperiod. The application of a longer photoperiod would therefore favour an egg production system.
- Full Text:
- Date Issued: 2003
- Authors: De Jager, Pieter Herodes
- Date: 2003
- Subjects: Quails , Quails -- Growth , Quails -- Effect of light on , Photoperiodism
- Language: English
- Type: Thesis , Masters , MTech (Agricultural Management)
- Identifier: vital:10969 , http://hdl.handle.net/10948/227 , Quails , Quails -- Growth , Quails -- Effect of light on , Photoperiodism
- Description: The aim of the study was to determine the effect of photoperiod on production of quail in South Africa. Day old chicks were randomly divided into two groups. One group (n=74) received continuous light (LL) while the other group (n=77) received 13 h of light (LD) per day. Traits measured were sexual characteristics (age at sexual maturity and testis weight, egg production and egg weight) and growth (body weight) development in males and females respectively. Significant differences in growth existed between sexes; females were 171.44±17.15 and 182.91±17.75 g compared to the 151.77±13.20 and 155.00±16.86 g for males in both LL and LD groups respectively. Both males and females in the LL group initially outperformed the LD group in growth rate but, by day 72 the LD group had compensated and were 4.6% heavier than the LL group. A similar trend was observed for sexual maturity between the LL and LD groups. However, photoperiod did significantly influence initial egg production in favour of the LL group. The LL group had 80% of the females in production by day 44 compared to the 60% of the LD group. The initial egg weight of the LL group was 14 % higher than those of the LD group. Quail subjected to continuous light attained earlier sexual maturity and production with lower final weight compared to quail subjected to an intermediate photoperiod. The application of a longer photoperiod would therefore favour an egg production system.
- Full Text:
- Date Issued: 2003
Paranoid metaphors: an examination of the discursive, theoretical and sometimes personal, interaction between the psychoanalyst, Jacques Lacan, the surrealist, Salvador Dali, and the English poet, David Gascoyne
- Authors: De Klerk, Eugene
- Date: 2003
- Subjects: Paranoia , Lacan, Jacques, 1901-1981 , Dali, Salvador, 1904-1989 , Gascoyne, David, 1916-2001
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2192 , http://hdl.handle.net/10962/d1002234 , Paranoia , Lacan, Jacques, 1901-1981 , Dali, Salvador, 1904-1989 , Gascoyne, David, 1916-2001
- Description: This thesis examines the historical interaction of the psychoanalyst, Jacques Lacan, the surrealist, Salvador Dali, and the English poet, David Gascoyne. It traces the discursive, and sometimes personal, relationship between these figures which led to a psychoanalytic-based conception of paranoia that impacted on both surrealism and the surrealist-inspired poetry and theory of David Gascoyne. Furthermore it seeks to identify the potential ramifications of this conception of paranoia, and the artistic practice it engendered, for literary, Marxist and psychoanalytic theory.
- Full Text:
- Date Issued: 2003
- Authors: De Klerk, Eugene
- Date: 2003
- Subjects: Paranoia , Lacan, Jacques, 1901-1981 , Dali, Salvador, 1904-1989 , Gascoyne, David, 1916-2001
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2192 , http://hdl.handle.net/10962/d1002234 , Paranoia , Lacan, Jacques, 1901-1981 , Dali, Salvador, 1904-1989 , Gascoyne, David, 1916-2001
- Description: This thesis examines the historical interaction of the psychoanalyst, Jacques Lacan, the surrealist, Salvador Dali, and the English poet, David Gascoyne. It traces the discursive, and sometimes personal, relationship between these figures which led to a psychoanalytic-based conception of paranoia that impacted on both surrealism and the surrealist-inspired poetry and theory of David Gascoyne. Furthermore it seeks to identify the potential ramifications of this conception of paranoia, and the artistic practice it engendered, for literary, Marxist and psychoanalytic theory.
- Full Text:
- Date Issued: 2003
Towards a norm in South African Englishes: the case for Xhosa English
- Authors: De Klerk, Vivian A
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6131 , http://hdl.handle.net/10962/d1011583
- Description: Black South African English (BSAE) is generally regarded today as the variety of English commonly used by mother-tongue speakers of South Africa's indigenous African languages in areas where English is not the language of the majority. Its roots lie in the history of the teaching of English to the black people of this country, where the role models who teach English are second language learners themselves. To date, BSAE has mainly been studied within an applied linguistic framework with emphasis on its character as a second language which is deviant from standard English. An alternative view is to see it as a variety in its own right, a new or world English (Coetsee Van Rooy and Verhoef, 2000; van der Walt and van Rooy, 2002). As a consequence, a new look at norms is becoming increasingly necessary, so that decisions about learners' language competence can be made in terms of this variety. This paper reports on preliminary analyses of a recently collected corpus of Xhosa English (XE) (a sub-category of BSAE) which consists of naturalistic spoken data, and comprises some 540,000 words of Xhosa English. This large database enables empirical analysis of actual patterns of use in language, making it possible to test earlier speculations which have been based on intuition, and to explore the possibility of systematic differences in the patterns of structure and use in this particular variety. The paper focuses on 20 separate linguistic characteristics, most of which have been previously identified in the literature as being features of BSAE, and analyses each of them in turn, in order to ascertain their usage patterns and frequency of occurrence in the corpus.
- Full Text:
- Date Issued: 2003
- Authors: De Klerk, Vivian A
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6131 , http://hdl.handle.net/10962/d1011583
- Description: Black South African English (BSAE) is generally regarded today as the variety of English commonly used by mother-tongue speakers of South Africa's indigenous African languages in areas where English is not the language of the majority. Its roots lie in the history of the teaching of English to the black people of this country, where the role models who teach English are second language learners themselves. To date, BSAE has mainly been studied within an applied linguistic framework with emphasis on its character as a second language which is deviant from standard English. An alternative view is to see it as a variety in its own right, a new or world English (Coetsee Van Rooy and Verhoef, 2000; van der Walt and van Rooy, 2002). As a consequence, a new look at norms is becoming increasingly necessary, so that decisions about learners' language competence can be made in terms of this variety. This paper reports on preliminary analyses of a recently collected corpus of Xhosa English (XE) (a sub-category of BSAE) which consists of naturalistic spoken data, and comprises some 540,000 words of Xhosa English. This large database enables empirical analysis of actual patterns of use in language, making it possible to test earlier speculations which have been based on intuition, and to explore the possibility of systematic differences in the patterns of structure and use in this particular variety. The paper focuses on 20 separate linguistic characteristics, most of which have been previously identified in the literature as being features of BSAE, and analyses each of them in turn, in order to ascertain their usage patterns and frequency of occurrence in the corpus.
- Full Text:
- Date Issued: 2003