List of Titles

An investigation of factors which influence integrating indigenous knowledge of medicinal plants into the learning programme for Grade 9 General Science

- Kimbugwe, Francis Kambugu

Authors: Kimbugwe, Francis Kambugu
Date: 2001
Subjects: Ethnoscience Ethnoscience -- South Africa -- Eastern Cape Medicinal plants -- South Africa -- Eastern Cape Curriculum planning -- South Africa
Language: English
Type: Thesis , Masters , MEd
Identifier: vital:1624 , http://hdl.handle.net/10962/d1003506
Description: This study explores knowledge of some medicinal plants amongst the sub-urban community of and around a township in the Eastern Cape province. This qualitative interpretivist case study presents the prior knowledge of medicinal plants possessed by Grade 9 learners, which is used as a springboard toward interviewing traditional healers, herbal practitioners and lecturers at a university in the departments of Botany and Pharmacy. The data obtained from the informants reveals the factors that can influence integration of indigenous knowledge of medicinal plants in the learning programme for grade 9 General Science. These factors include: prior knowledge and enthusiasm of Grade 9 learners and teachers, support of the community which include parents, traditional healers, herbal practitioners and professionals who could introduce indigenous knowledge of medicinal plants into formal education, availability of resource materials and complexity of identifying pharmacologically tested plants from other indigenous medicinal plants. The analysis and discussion of the findings, have led me to conclude that the enthusiasm of learners who have a rich background of indigenous knowledge on medicinal plants is likely to be hampered by the unenthusiastic teachers as well as the reluctance of herbal practitioners in their communities to part with this knowledge. Hence I recommend that teachers be motivated through workshops and in-service training, conducted by goverr\ment paid herbal practitioners using the prior knowledge of learners as a stepping-stone.
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Date Issued: 2001

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An investigation of the municipal credit control policy, with special reference to the Nelson Mandela Metropolitan Municipality

- Tsatsire, Israel

Authors: Tsatsire, Israel
Date: 2001
Subjects: Municipal finance -- Accounting
Language: English
Type: Thesis , Masters , MTech (Tourism management)
Identifier: vital:10769 , http://hdl.handle.net/10948/67 , Municipal finance -- Accounting
Description: In this mini-dissertation, an investigation of the municipal credit control policy, with specific reference to the Nelson Mandela Metropolitan Municipality was undertaken. The dissertation comprises six chapters. The study is based on the assumption that the existing credit control policy currently (2001) used by the Nelson Mandela Metropolitan Municipality to collect service arrears has failed and that this failure is the reason why the Municipality is struggling to survive financially. This is affecting the rendering of services. The validity of this assumption was investigated. The primary objectives of the research included, inter alia, to provide a brief theoretical background on the transformation of local government in South Africa. This was followed by an investigation of the role of South African local government and the impact of non-payment for municipal services, with specific reference to the Nelson Mandela Metropolitan Municipality. The empirical survey, the research methodology and the interpretation of the research findings are described. This is followed by an explanation of the survey questionnaire used for the accumulation of data needed for the analysis. The research findings of the empirical survey were statistically analysed and reported.
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Date Issued: 2001

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Analysis of supply chain improvement strategies by first tier automatic suppliers in the Nelson Mandela metropole

- Tinderholm, Pieter Johannes

Authors: Tinderholm, Pieter Johannes
Date: 2001
Subjects: Business logistics , Production management
Language: English
Type: Thesis , Masters , MTech
Identifier: vital:10841 , http://hdl.handle.net/10948/37 , Business logistics , Production management
Description: First tier automotive suppliers in the Nelson Mandela Metropole are under continued pressures created by the process of globalisation. To stay globally competitive suppliers, have to rethink their supply chain strategies. It is important that suppliers understand the environment that it operates within, this environment present first tier automotive suppliers with numerous problems and challenges. An analysis of this problems and challenges are needed and supply chain strategies need to be developed to overcome these problems and challenges. Before these strategies can be developed a full understanding of the supply chain is necessary. This dissertation aims to assess the problems and challenges facing first tier automotive suppliers, give a full understanding of the supply chain and present strategies to overcome these problems and challenges. The supply chain has become less structured and closer partnerships are needed between trading partners. The connectivity, transparency and visibility of the supply chain have improved through developments in the communication technology field. Strategies need to utilise these technologies to create a competitive edge. Effective supply chain strategies need to enable first tier automotive suppliers to deliver materials: At the right time; In the right quantities; At the right quality.
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Date Issued: 2001

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Analysis of the modes of entry into the central East Africa market for a multinational enterprise

- Knight, John Lawry Cole

Authors: Knight, John Lawry Cole
Date: 2001
Subjects: Export marketing , Competition, International , International business enterprises
Language: English
Type: Thesis , Masters , MTech
Identifier: vital:10842 , http://hdl.handle.net/10948/38 , Export marketing , Competition, International , International business enterprises
Description: The research problem addressed in this study is to determine the potential of selling and marketing consumer goods by Multinational Enterprises (MNE) within the African markets. The mode of entry, the timing of entry, the different modes of entry, selection of the entry mode, the political and economic risks, core competencies of the company and strategic alliance was researched. To achieve this, research was executed on the above areas of importance using relevant literature in which an understanding of the international markets and their options of modes of entry were highlighted. In this way one is able to understand the importance of the international markets and the concerns of doing business in Africa in order to select the entry mode that could best suit the company and the country or countries in Africa. The literature study was then used to develop a questionnaire to test the degree to which managers in MNE in South Africa (SA) and Central East Africa (CEA) concur with regard to the decisions, risks, procedure, modes of entry and selection of modes of entry into Africa. The empirical results obtained indicate a strong concurrence with the analysis of the modes of entry into CEA market for an MNE. The analysis of the literature study, Chapter 2 and 3, gives business a good understanding of the advantages and disadvantages of the problems and opportunities associated with the entry decisions into CEA. Many other companies are entering the African markets from other parts of the world and SA has also been seen as a launching pad into Africa. The analysis will give companies the edge in seeing the problems and opportunities in African markets and the way forward when deciding to enter.
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Date Issued: 2001

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Applicability of a health literacy test from the U.S. in a South African population

- Lecoko, Motlalepule Lebogang Elizabeth

Authors: Lecoko, Motlalepule Lebogang Elizabeth
Date: 2001 , 2013-04-29
Subjects: Literacy , Literacy -- South Africa , Literacy -- Ability testing , Reading -- Ability testing
Language: English
Type: Thesis , Masters , MSc
Identifier: vital:3824 , http://hdl.handle.net/10962/d1005931 , Literacy , Literacy -- South Africa , Literacy -- Ability testing , Reading -- Ability testing
Description: This thesis investigates the suitability and applicability of a health literacy test from the U.S. in a black, Xhosa-speaking, South African population. The concept of literacy is a controversial one which has been much debated, as it is not easy to classifY people as simply either literate or illiterate. As a result there are a number of definitions of literacy that vary with purpose and culture, but the most common one is that a person is literate if he/she can read and write. Estimating literacy from years of schooling is an inexpensive method but is also unreliable, since people generally read 3 to 5 grades below their stated educational level. This method affords little insight into the ability of patients to adequately function in a health care enviromnent, an ability which is referred to as functional health literacy. A number of health literacy tests such as the REALM (Rapid Estimate of Adult Literacy in Medicine) test have been developed to assess this skill. The REALM test is a word recognition test which places people into a relevant grade range estimate according to the number of words pronounced correctly. It appears to assume understanding of the word if the person is able to read that word correctly. In this project 125 black Xhosa-speaking respondents of varying educational levels who were literate in English were interviewed with the aid of an interpreter. Comprehensive demographic data were collected. Respondents were first asked to read all 66 words aloud during which time pronunciation was checked, and thereafter they were asked to explain each word. It was found that the ability to automatically decode and read the words did not necessarily guarantee comprehension of these words. Many of the words proved to be unfamiliar to the majority of the Xhosa respondents who were able to pronounce them correctly, but could not explain them. These tended to be phonetically transparent words which were therefore more accessible to the unfamiliar reader. This research has proven to be of great value in helping identify such words which should be substituted with simpler words for use in health information materials. A number of words could neither be pronounced nor understood by the population majority and, interestingly, a small group of words could not be pronounced but were satisfactorily explained by some respondents. The results showed an extremely poor correlation between the stated educational level and the REALM grade range estimate. This emphasizes the inappropriateness of years of formal schooling as an indicator of functional health literacy. The criteria were established for deciding cases in which the REALM test could be applied (or succeeds) and when it is inapplicable (or fails). It was found to be inapplicable in 41% of cases which clearly indicates that, in its current form, it is not a valid, reliable test to use in determining health literacy in this English second language population. It can, however, be used as a basis fur the development of a more appropriate test. Recommendations for future research direction are presented and an alternative structure for a health literacy test is suggested. , KMBT_363 , Adobe Acrobat 9.53 Paper Capture Plug-in
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Date Issued: 2001

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Application of Pascale's constructive 'conflict paradigm' to consider transformation efforts at a selected bank with particular attention to the ATM devision

- Coetzer, Gary

Authors: Coetzer, Gary
Date: 2001
Subjects: Organizational change , Banks and banking -- South Africa
Language: English
Type: Thesis , Masters , MTech
Identifier: vital:10843 , http://hdl.handle.net/10948/39 , Organizational change , Banks and banking -- South Africa
Description: In applying Pascale’s (1990) constructive ‘conflict paradigm’ to consider transformation efforts at a selected bank, this study argues that transformation could be sustained if the organisation were to self-reflect on the paradoxes that are generated when constructive conflict is encouraged. Underlying this supposition is the notion of “disequilibrium” which supports creative tension within organisations and prompts inquiry and dialogue, leading to the new. Sustaining disequilibrium allows an organisation to develop the “requisite internal variety” in order to meet the challenges in its environment. Key to encouraging this form of organisational resilience to its environment is the nature of the organisation’s culture or context. Johnson’s (1998) “cultural web” is used to analyse the culture of the selected bank and “re-map” the culture in line with the bank’s transformation strategies. Pascale’s seven domains of contention are applied with particular emphasis on the ATM division in order to develop a profile of conflict in the organisation.
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Date Issued: 2001

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Applications of Baylis-Idllman methodology in the synthesis of chromene derivatives

- Nocanda, Xolani Wittleton

Authors: Nocanda, Xolani Wittleton
Date: 2001
Subjects: Heterocyclic chemistry , Heterocyclic compounds -- Derivatives
Language: English
Type: Thesis , Doctoral , PhD
Identifier: vital:4556 , http://hdl.handle.net/10962/d1018257
Description: The reaction of salicylaldehyde with various activated alkenes, viz., methyl vinyl ketone, ethyl vinyl ketone, phenyl vinyl sulfone, phenyl vinylsulfonate, acrolein and acrylonitrile, under Baylis-Hillman conditions, has been found to proceed with the chemoselective formation of chromene derivatives. The reaction conditions have been optimised and chromene derivatives have been obtained in isolated yields up to 87 %. The generality of the reaction, using 1,4-diazabicyclo[2.2.2]octane (DABCO), as the catalyst, and a heterogeneous (chloroform-water) solvent system, has been established using a range of salicylaldehyde derivatives,. including 2-hydroxynaphthaldehyde. The formation of chromene derivatives, under these conditions, has been assumed to proceed via an initial, Baylis-Hillman reaction, followed by cyclisation involving intramolecular conjugate addition, and subsequent dehydration. Evidence supporting this sequence has been obtained from the isolation ofBaylis-Hillman products from reactions involving the use of tertbutylclimethylsilyl-protected salicylaldehyde, 4-hydroxybenzaldehyde and tert-butyl acrylate as substrates. The potential of the ''Baylis-Hillman zwitterion" to participate as a donor species in Michael-type addition reactions has been explored and a series of climeric products has been isolated. The Baylis-Hillman methodology has also been successfully extended to the synthesis of sulfurcontaining heterocyclic systems, and a range of 3-substituted thiochromenes has been obtained in moderate yields, using 2,2'-dithiobenzaldehyde and various activated alkenes in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) as catalyst. The electron-impact mass spectra of selected chromene and thiocbromene derivatives have been investigated permitting comparison of the fragmentation of the oxygen- and sulfur-containing analogues. In a study directed at the synthesis of potential HIV -1 protease inhibitors, chromene- and thiocbromene-containing analogues of the clinically useful drug, ritonavir, have been prepared. Thiochromene and chromene derivatives were converted to the corresponding 3 -carboxylic acids and coupled with a specially prepared, hydroxyethylene dipeptide isostere to afford ritonavir analogues containing cbromene and thiochromene termini in ca. 60% yield.
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Date Issued: 2001

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Aspects of imagery in Catherine of Siena from a Jungian perspective

- Munro, Alison Mary

Authors: Munro, Alison Mary
Date: 2001
Subjects: Catherine of Siena, Saint, 1347-1380 , Christian Saints -- Italy , Jung, C G (Carl Gustav), 1875-1961
Language: English
Type: Thesis , Masters , MTh
Identifier: vital:1308 , http://hdl.handle.net/10962/d1018216
Description: This study investigates whether or nor not the imagery of Catherine of Siena can be interpreted from a Jungian perspective. It takes a lead from other studies, notably one on Teresa of Avila and Jung. Reading of medieval literature suggests that medievals applied the use of symbols and imagery in ways that are at times baffling to people of our time. Carl Jung was no stranger to imagery and symbol. In our current age with its renewed emphasis on the insights of spirituality, and to some extent its disenchantment with aspects of traditional psychology, there is room for a dialogue between the two disciplines of mysticism and psychology across a six-hundred year divide. The use of imagery, as a window to the soul, in the Christian tradition is examined. Catherine of Siena is situated within her own medieval context, one of upheaval in the church, but also an age of mysticism and spiritual/religious phenomena strange to our own time. Catherine is introduced against the background of her world and against the backdrop of the Dominican tradition. A discussion of some of her major imagery demonstrates her aim of union with God. An understanding of conscious aspects and of unconscious aspects of the self is shown as key to Jung ' s view of the psyche. Elucidation of some archetypes and a discussion of Jung's dream analysis demonstrates how Jung believed the unconscious becomes conscious, and how individuation becomes a possibility. Key Catherinian images are examined from a Jungian perspective. Catherine has relevance for the twenty first century, and we are invited to be challenged by the mysteries and truths to which her images point us.
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Date Issued: 2001

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Aspects of the cosmic Christ in the spirituality of Dom Bede Griffiths

- Forster, Dion Angus

Authors: Forster, Dion Angus
Date: 2001
Subjects: Griffiths, Bede, 1906-1993 , Catholic Church -- India -- Clergy -- Biography
Language: English
Type: Thesis , Masters , MTh
Identifier: vital:1305 , http://hdl.handle.net/10962/d1018212
Description: Alan Griffiths was born at Walton-on Thames, England in 1906. He was educated at Christ's Hospital and later at Oxford (under the tutelage of C.S. Lewis). At Oxford he read English literature and philosophy. After considerable inner turmoil he was converted to Christianity in 1931 and entered the Roman Catholic Church in 1933. As a novice Benedictine he was given the name Bede, and was finally ordained as a priest 1940. In 1955 Fr Bede went to India to start a Benedictine community with Dom Benedict Alapatt. He later moved to Kurisumala Ashram in Kerala, and finally, in 1968, to Shantivanam Ashram in Tamil Nadu. He died at Shantivanarn in 1993. Fr Bede was, and still is, regarded by many as a spiritual pioneer. This high regard stems from an appreciation of his spirituality which was rooted in a mystical experience of God. This thesis investigates aspects of Fr Bede's cosmic christology as they arise from his spirituality. The aim of this research is to show that Fr Bede’s cosmic christology that stems from an expression of a real mystical experience of Christ, as the source, sustainer and goal of the whole cosmos, offers both value and insight to Christian spiritual practice and the formulation of doctrine. What makes Fr Bede's spirituality so valuable is the manner in which he integrated East and West in his spirituality and person, coupled with his ability to draw upon that integration in reflecting and articulating his experience - which ultimately shaped his cosmic christology. In order to share his knowledge and experience of the cosmic Christ, Fr Bede draws upon linguistic and philosophical concepts from the East (and Hinduism in particular) as well as the language and theory arising from discoveries in the areas of quantum physics, microbiology and transpersonal psychology in the West. It is the primacy of spiritual experience, coupled with Fr Bede's ability to integrate the religions, cultures and world-views of the East and West within himself, which makes his cosmic christology so compelling.
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Date Issued: 2001

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Aspects of the new repurchase system of monetary control in South Africa

- Springfield, Samantha Claire

Authors: Springfield, Samantha Claire
Date: 2001
Subjects: Monetary policy -- South Africa Credit control -- South Africa
Language: English
Type: Thesis , Masters , MEcon
Identifier: vital:940 , http://hdl.handle.net/10962/d1002673
Description: The main objective of monetary policy is to protect the value of the currency, and in so doing, achieve the objectives of maximum economic growth, development, and the creation of employment opportunities. As from 1985, under the advice of the De Kock Commission, the South African Reserve Bank (SARB), implemented the classical cash reserve system of monetary control. Under this system, the SARB was willing to refinance the money market shortage fully, automatically, and on certain predetermined terms, conditions and costs. However, since the new political dispensation in 1994, South Africa’s financial markets have become more globalized, liberalised, and integrated. Thus, the classical cash reserve system had lost its usefulness, and was no longer effective. As from March 1998, the SARB implemented the new repurchase system of monetary control. In implementing the repurchase system of monetary control, South Africa was adopting a more eclectic approach. This system is aimed at making monetary policy more effective and more flexible in a financial environment filled with complexities. This study finds that the repurchase system has thus far been successful in meeting its objectives. Interest rates are more flexible and sensitive to developments in the domestic and external environment, the signalling mechanism of the SARB has proved to be successful, accommodation and interest rates are closely related and the interbank market has become more developed. Therefore, the repurchase system appears to be more efficient than the previous system of monetary control in South Africa.
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Date Issued: 2001

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Assembly of full-length cDNA, and heterologous expression, of Nudaurelia B virus RNA

- Luke, Gary Joseph

Authors: Luke, Gary Joseph
Date: 2001
Subjects: Imbrasia cytherea , RNA , Viruses , DNA
Language: English
Type: Thesis , Masters , MSc
Identifier: vital:3913 , http://hdl.handle.net/10962/d1003972 , Imbrasia cytherea , RNA , Viruses , DNA
Description: Nudaurelia beta virus (NβV) is a monopartite genome virus belonging to the family Tetraviridae. Its host range has been found to be limited to a single insect order, the Lepidoptera (moths and butterflies). The single-stranded positive-sense RNA genome consists of 6625 nucleotides containing two open reading frames (ORFs). The 5' proximal ORF of 5778 nucleotides encodes a protein of 215 kDa containing three functional domains characteristic of RNA-dependent RNA polymerase. The 3' proximal ORF, of 1836 nucleotides, encodes the 66 kDa capsid precursor protein and overlaps the replicase gene by more than 99% and is in the +1 reading frame relative to the replicase reading frame. The full-length cDNA construct of the NβV genome was assembled using a homologous overlapping PCR linking method. The starting material consisted of seven overlapping pieces that were constructed for sequencing. Due to the degradation of the full-length RNA obtained from virus extracted from field-collected Nudaurelia cytherea capensis larvae other alternative methods needed to be applied. Sub-cloning using restriction enzyme sites also required an alternative method being used, due to the abundance of restriction sites of the same type in the NβV genome. This led to the use of a method similar to "DNA Shuffling" where overlapping pieces were connected using a modified PCR protocol. After the construction of the NβV genome, the full-length PCR product was cloned and checked for large insertion and deletions that could have resulted from the PCR amplification. The heterologous expression of the NβV capsid protein linked to a fusion protein (Glutathione S-transferase) in E.coli, confirmed the authenticity of the prescribed capsid gene ORF. The expression showed that the virus protein was subjected to protease digestion in DH5α E.coli, suggesting that the protein was insoluble in the cell cytoplasm. The capsid gene expression in a modified E.coli strain, Epicurian Coli BL21-CodonPlus (DE3)-RIL, resulted in high levels of the correct molecular weight protein with minimal degradation. The modified strain was designed for over-expression of eukaryotic protein with lowered protease activity. The above results have opened the way for further research that would yield valuable insight into the molecular biology and replication strategy of the NβV in cell cultures.
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Date Issued: 2001

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Assessing the impact of the Human Immunodeficiency Virus / Acquired Immunodeficiency Syndrome on Volkswagen of South Africa

- White, Stephen Mark

Authors: White, Stephen Mark
Date: 2001
Subjects: AIDS (Disease) -- Economic aspects -- South Africa , Automobile industry and trade -- Management , Labor productivity , Production management , Volkswagen of South Africa (Firm)
Language: English
Type: Thesis , Masters , MTech
Identifier: vital:10844 , http://hdl.handle.net/10948/40 , AIDS (Disease) -- Economic aspects -- South Africa , Automobile industry and trade -- Management , Labor productivity , Production management , Volkswagen of South Africa (Firm)
Description: This treatise takes the form of an impact study. It is based on a three-month period of research involving literature review, interviews with VWSA officers and a survey of 111 of the 5500 workers who comprised the workforce of the VWSA plant in Uitenhage at that time. The author has attempted to portray the general views of experts in the field of HIV/AIDS corporate impact and impact management. In addition he has attempted to assay the current and forecast policies and practices in respect of the management of the epidemic by VWSA. The workers in the plant were consulted by survey and a variety of insights into the level of understanding of the epidemic, tolerance levels, expectations and so on were made. The quantification of these insights must be viewed with caution since the survey sample of 111 was relatively low for a workforce of circa 5500. Calculations in respect of representativity are included to facilitate calculated caution. It has been shown that the HIV/AIDS epidemic has a considerable current impact on the company and that this impact can be expected to grow considerably in the future. It has been suggested that an active intervention program would be well timed if implemented immediately
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Date Issued: 2001

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Assessment of selected supply and demand components of the tourism industry in the George/Wilderness Area

- Rutherford, David Leon

Authors: Rutherford, David Leon
Date: 2001
Subjects: Tourism -- South Africa -- Western Cape
Language: English
Type: Thesis , Masters , MTech
Identifier: vital:10845 , http://hdl.handle.net/10948/42 , Tourism -- South Africa -- Western Cape
Description: In this research paper a database of accommodation establishments was compiled, and certain supply and demand aspects of the tourism industry in the George / Wilderness area were measured with a view to determine whether planning by the private sector and local authorities could benefit therefrom. Attention was given to the peculiar nature of tourism demand and tourism supply and how selected components thereof could be measured. The research methodology followed included: a literature survey to facilitate an understanding of the nature of tourism supply and tourism demand; the construction of a database of accommodation establishments in order to identify all participants in the George / Wilderness tourism industry; a telephone survey to determine the supply of bed nights in the area; and a questionnaire survey to determine the demand by tourists for bed nights in the area. The following recommendations and conclusions were made: The database compiled during this study should be kept up to date and be expanded to include visitor profiles such as country of origin, length of stay, and primary reason for travel in order that private and public sector concerns may draw statistics / data to be used in the planning and / or marketing of the tourism industry to tourists. Greater co-operation and co-ordination between private and public sectors of the tourism industry are needed to obtain data concerning the tourism market required for planning purposes as well as a concerted marketing effort. Failing this, legislation should be introduced, compelling accommodation establishments to make available supply and demand data to the regional services council for statistical purposes. The study should be extended to cover the entire Southern Cape region in order to obtain statistics applicable to the region as a whole. This will then facilitate both local and regional planning as well as a coordinated marketing effort.
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Date Issued: 2001

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Attitudes and perceptions of marriage and divorce among Indian Muslim students

- Naidoo, Suraya

Authors: Naidoo, Suraya
Date: 2001
Subjects: Muslim families -- Social life and customs , Muslim students -- Attitudes
Language: English
Type: Thesis , Masters , MSocSc
Identifier: vital:3289 , http://hdl.handle.net/10962/d1003077 , Muslim families -- Social life and customs , Muslim students -- Attitudes
Description: This study explores the question of religion and ethnicity as a source of family diversity and ideology. An ideal-typical "traditional Muslim family ideology" was developed and tested. Eight Indian Muslim students at Rhodes University were asked about their attitudes and perceptions of marriage and family life, to determine the particular type of family ideology that these students embraced. Family-related issues such as marriage; the division of labour; gender roles; the extended family system; divorce; and polygamy were addressed. On the basis of the research results, it was found that these students largely adopted the "traditional Muslim family ideology". Religion and ethnicity were found to play an important role, in the make-up of these students' perception of marriage and family life, and a strong preference for the extended family was shown.
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Date Issued: 2001

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Bandwidth management and monitoring for IP network traffic : an investigation

- Irwin, Barry Vivian William

Authors: Irwin, Barry Vivian William
Date: 2001
Subjects: TCP/IP (Computer network protocol) , Computer networks , Electronic data processing -- Management , Computer networks -- Management
Language: English
Type: Thesis , Masters , MSc
Identifier: vital:4624 , http://hdl.handle.net/10962/d1006492 , TCP/IP (Computer network protocol) , Computer networks , Electronic data processing -- Management , Computer networks -- Management
Description: Bandwidth management is a topic which is often discussed, but on which relatively little work has been done with regard to compiling a comprehensive set of techniques and methods for managing traffic on a network. What work has been done has concentrated on higher end networks, rather than the low bandwidth links which are commonly available in South Africa and other areas outside the United States. With more organisations increasingly making use of the Internet on a daily basis, the demand for bandwidth is outstripping the ability of providers to upgrade their infrastructure. This resource is therefore in need of management. In addition, for Internet access to become economically viable for widespread use by schools, NGOs and other academic institutions, the associated costs need to be controlled. Bandwidth management not only impacts on direct cost control, but encompasses the process of engineering a network and network resources in order to ensure the provision of as optimal a service as possible. Included in this is the provision of user education. Software has been developed for the implementation of traffic quotas, dynamic firewalling and visualisation. The research investigates various methods for monitoring and management of IP traffic with particular applicability to low bandwidth links. Several forms of visualisation for the analysis of historical and near-realtime traffic data are also discussed, including the use of three-dimensional landscapes. A number of bandwidth management practices are proposed, and the advantages of their combination, and complementary use are highlighted. By implementing these suggested policies, a holistic approach can be taken to the issue of bandwidth management on Internet links.
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Date Issued: 2001

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Behavioural interactions of predators and spawning chokka squid off South Africa: towards quantification

- Smale, Malcolm J, Sauer, Warwick H H, Roberts, M

Authors: Smale, Malcolm J , Sauer, Warwick H H , Roberts, M
Date: 2001
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/123921 , vital:35516 , https://doi.10.1007/s002270100664
Description: The interaction of a suite of predators with mating and spawning chokka squid (Loligo vulgaris reynaudii) was studied at inshore (<50 m) spawning grounds off South Africa. This study provides the first detailed records of predator–prey interactions of squids on their spawning grounds and is the first attempt to time disruptions caused by predators to the egg-laying behaviour of squids, thereby quantifying the perceived threat to the prey. The squids are focused on mate choice and reproduction while they aggregate over egg beds and they may be more vulnerable to predation than at other times. Their vulnerability to different predators in the field is examined and the tactics used against different predatory species are illustrated using recordings made with underwater video cameras. Predators recorded included two cephalopods (Octopus vulgaris and L. v. reynaudii), five teleosts (Pagellus bellotii natalensis, Spondyliosoma emarginatum, Pachymetopon aeneum, Cheimerius nufar and Pomatomus saltatrix), seven chondrichthyians (Squalus megalops, Mustelus mustelus, Carcharias taurus, Dasyatis brevicaudata, Gymnura natalensis, Poroderma africanum and P. pantherinum) and three marine mammals (Arctocephalus puscillus, Tursiops aduncus and Delphinus delphis). Analysis of behavioural interactions between predators and prey showed that predator disruption of egg laying may be quantified in terms of time. Marine mammals caused the most acute disruption, whereas other taxa had more chronic disruption effects because they spent more time on the spawning grounds. During November 1995, the suite of predators changed during the course of a 2-day period of underwater video recording, possibly because of an increase in water temperature. The hypothesis that predators would be concentrated around a spawning aggregation was tested by surveying the spawning ground using an underwater camera towed by a boat navigating with differential GPS. The results supported the hypothesis because predators were located only around the spawning sites. The serial spawning of chokka squids in recently upwelled water may reduce predation pressure. Furthermore, it may be difficult for predators to predict the specific spawning site on a particular day because squids disperse away from egg beds at night and use numerous spawning sites along the coast.
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Date Issued: 2001

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Bells and bell ringers in South Africa, 1835-2000. Part I

- Lewis, Colin A

Authors: Lewis, Colin A
Date: 2001
Language: English
Type: Article
Identifier: vital:6164 , http://hdl.handle.net/10962/d1012352 , http://www.ringingworld.co.uk/
Description: Colin Lewis was Professor of Geography at Rhodes University, Grahamstown, South Africa from 1989 until his retirement at the end of 2007. In 1990, with the strong support of the incumbent Vice-Chancellor, Dr Derek Henderson, he instigated the Certificate in Change Ringing (Church Bell Ringing) in the Rhodes University Department of Music and Musicology - the first such course to be offered in Africa. Since that date he has lectured in the basic theory, and taught the practice of change ringing. He is the Ringing Master of the Cathedral of St Michael and St George, Grahamstown, South Africa. , The first ring of bells in Africa was installed in Grahamstown Cathedral in 1879 at the instigation of Frederick Henry Williams. Williams was Dean of Grahamstown from 1865 until his death in 1885. He was born in County Fermanagh, Ireland, not far from Enniskillen, where an octave was installed in the Cathedral when Williams was an impressionable 12-year old. Grahamstown's bells were also an octave, cast by John Warner and Sons of London. They were hung in the newly built tower, designed by the English architect, George Gilbert Scott.
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Date Issued: 2001

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Byvoeding van skape op aangeplante weiding in 'n mediterreense klimaat

- Aucamp, Barend Bernadus

Authors: Aucamp, Barend Bernadus
Date: 2001
Subjects: Sheep -- Feeding and feeds
Language: Afrikaans
Type: Thesis , Masters , MTech (Agriculture)
Identifier: vital:10949 , http://hdl.handle.net/10948/44 , Sheep -- Feeding and feeds
Description: Tydens embrio ontwikkeling groei weefsel deur selvermeedering, maar soos wat soogdiere volwassendheid nader vind groei net plaas deur sel vergroting. Volwassenheid word beskou as wanneer spiergroei ‘n maksimum bereik. Groei sluit die neerlegging van vet in, maar spiermassa is van primêre belang. Die groeikurwe (Fig 1) waarin massatoename teenoor ouderdom vergelyk word, volg ‘n sigmoidale kurwe (Owens et al, 1993). Onder ideale toestande is die groeitempo van lammers relatief konstant van kort na geboorte totdat die helfte van volwassemassa bereik word, waarna dit geleidelik afneem tot volwassenheid (Black, 1983). Die afname in groeitempo begin gewoonlik met die bereiking van puberteit (Owens et al, 1993).
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Date Issued: 2001

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