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Foraging ecology of Cape Gannets (Morus Capensis) at Bird Island, Algoa Bay

  • Authors: Green, David Bruce
  • Date: 2013
  • Subjects: Birds of prey -- Behavior -- South Africa -- Algoa Bay , Gannets -- South Africa -- Algoa Bay , Birds -- Breeding -- South Africa -- Algoa Bay
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:10725 , http://hdl.handle.net/10948/d1020790
  • Description: The Cape gannet has undergone considerable population change and redistribution over the past 50 years. This has been linked to shifts in the abundance and distribution of their dominant prey, sardine and anchovy. Five breeding colonies, along the west coast of Southern Africa, have shown rapid population declines as a result of reduced prey availability. In contrast, a single colony (Bird Island, Algoa Bay) on the south coast of South Africa has, over the same period, grown fivefold and now supports approximately two thirds of the total population. Due to its conservation importance, and isolation from other breeding localities, it is important to assess the health of the Bird Island colony, and determine how foraging distribution relates to the environment to evaluate current measures of protection. This was achieved through two related studies; a long-term dietary analysis spanning 34 years, and a spatial foraging study, which related three years of tracking data to estimates of prey availability, oceanographic features and marine protected areas (MPAs). The results of the dietary study showed that the dietary constituents of Cape gannets breeding at Bird Island have remained similar over the last three decades, but the importance of sardine and anchovy has increased significantly. For sardine, in particular, this reflects an increased availability of this species (as deduced from hydroacoustic surveys) within the foraging range of the Bird Island colony. The dietary abundance of anchovy was found to be negatively correlated with that of sardine. Surprisingly,.the dietary abundance of anchovy was also negatively correlated with estimates of its availability based on acoustic surveys. The latter is likely to be due to sardine being a preferred prey item. Recent decreases in the dietary contribution of sardine (since 2005) suggest that this species is becoming less available to gannets, with profound implications in terms of nutrient gain associated with foraging. However, this has been mediated by an increase in the dietary contribution of anchovy, which now accounts for the vast majority of prey taken. Spatially, the foraging range of the Bird Island colony expanded during the three years of study, indicating an increase in effort. This increase was likely in an effort to track a distributional change of sardine and anchovy, which showed an apparent westward shift during the study period. There was, however, no evidence of birds tracking features associated with high productivity. This may have been partly due to anomalously warm conditions during the summer of 2012/2013, in which an absence of coastal upwelling prevented surface cooling. Nonetheless, low sea surface temperatures and high chlorophyll a concentrations do not seem to be reliable indicators of important Cape gannet foragingareas. Foraging effort was largely concentrated outside of MPAs, indicating that the current MPA network provides little protection for foraging gannets. This could change with the additional protection of the proposed Greater Addo Elephant National Park MPA expansion, as prey species are allowed to recover following the removal of fishing pressure. Overall, the colony appears to be in good condition as the diet is still dominated by live prey items, and the foraging range remains smaller than many of the colonies along the west coast. However, it is important that monitoring be continued, in particular with respect to changes in the availability of sardine and anchovy. Long-term shifts of these species out of the colony‘s foraging range could negatively influence the population in the future. This might be worsened by interspecific competition for prey resources. Considering the conservation importance of this population, maintenance of healthy prey stocks within the home range of breeding Cape gannets should be prioritised in order to prevent declines similar to those observed at west coast colonies.
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  • Date Issued: 2013

Foreign direct investment and socio-economic development : the South African example

  • Authors: Mukosera, Precious Sipho
  • Date: 2013
  • Subjects: Investments, Foreign -- South Africa , Investments, Foreign -- Government policy -- South Africa , South Africa -- Economic policy , South Africa -- Economic conditions
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:9142 , http://hdl.handle.net/10948/d1018760
  • Description: It is widely accepted by governments of many developing countries that Foreign Direct Investment (FDI) is crucial to the socio-economic development of their nations and have developed various policies in an effort to attract FDI, as a result. FDI is a crucial source of technology, capital and skills for developing countries for economic growth that may ultimately lead to poverty reduction, employment creation and modernisation. However, results from many studies have been inconclusive and have failed to find a direct link between the increase of FDI and the associated socio-economic development of recipient nations. South Africa is no exception to this debate as it seeks to turn its back on decades long apartheid, which has entrenched poverty in the majority of its population and exacerbated social tensions. The main socio-economic challenges that South Africa faces include high unemployment, skills shortages, poverty and high inequality, and the 2008/2009 global financial and economic crisis has exacerbated the crisis. Despite these challenges South Africa‘s macro-economic strategies have had a good reputation since 2000. The monetary policy has turned out to be more transparent and predictable, and a sound fiscal policy has sustained its framework. The study analyses the role that FDI plays in the socio-economic development of South Africa since 1995 by focusing on selected case studies: ABSA Bank, General Motors South Africa (GMSA) and the Mining Sector of South Africa. The research concludes that although ABSA Bank has implemented several corporate social responsibility (CSR), and various employee development programmes, there is hardly any evidence to suggest that Barclays Bank‘s takeover of ABSA Bank has positively impacted on these programmes. General Motors South Africa (GMSA), which came into South Africa many decades ago through a Greenfield Investment, has played a positive role in the economy of the Eastern Cape Province as well as that of South Africa, having created jobs directly and indirectly. The company has also designed and implemented various educational, housing as well as health and awareness programmes for its employees and for the communities. Mining companies that operate in South Africa formed partnerships in the communities in which they operate in an effort to improve the lives of people. While these various projects have been a source of employment, they have had a limited impact on the core causes of social problems surrounding the mines. Many of these root causes relate to core business practices of the mining companies, especially employee recruitment, wages and housing. These root causes where witnessed in the Lonmin tragedy and in other strikes that spread throughout the sector in 2012. The study concludes that although FDI does play a role in the socio-economic development of South Africa, especially Greenfield investment, the same argument could not be made on Mergers and acquisitions (M&As). Finally, the South African government needs to play a proactive role in ensuring that foreign companies that invest in the country need to be well aware of the socio-economic needs of South Africa, and be willing to play a positive role in that regard.
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  • Date Issued: 2013

From human to human(e): an educator's reflexive narrative journeying

  • Authors: Rajoo, Neeranjini
  • Date: 2013
  • Subjects: Elementary school teachers -- South Africa , Poor -- South Africa , Humanity -- South Africa
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:9588 , http://hdl.handle.net/10948/d1021001
  • Description: From human to human(e) is an exploration of ways of coming to understand what it means to be(come) human and to belong (Vanier, 2003) while living and working as an educator in a disadvantaged community. In this sense, the purpose of this dissertation is the exploration of understanding what it might mean to be a ‘Foundation Phase’ (Primary/Elementary School) educator in a context of constructed poverty and disadvantage (Swanson 2004), thereby contributing to the field of education in this area, whilst embracing a practice of freedom and fostering apertures of hope and transcendence. This reflexive, rhizomatic narrative journeying (ibid) attempts to reach out to humanity via an interdisciplinary and arts-based approach that attempts to address concerns of inequity and pedagogical in-access and evokes the spiritual, emotive and philosophical in drawing attention to the ethical irresponsibility and socio-spiritual repercussions of ignoring social disadvantage in education. It includes inherences and impressions of humaneness in education. It seeks both introspection and insight into what ‘the human condition’ might mean to a just and robust education of children. In this sense, it is a personal inquiry as reflexive narrative journeying (ibid) based on twenty seven years of teaching in a primary school in a vulnerable and economically-impoverished community in the province of KwaZulu Natal in South Africa. As a writing-as-inquiry journeying, I engage with ‘critical rhizomatic narrative’ methodology (Swanson, 2004) as it resonates with the explorations of lived experiences that pertain to emotions, feelings, values and spirituality and because it enables a process of seeking what it might mean to be(come) human(e). This study is a philosophical rhizomatic narrative rendering which is an approach to(wards) understandings of personal growth and spirituality through understanding the various emergent journeys of life and the meanings that we can elicit from them to become more human and thus more humane.
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  • Date Issued: 2013

Gasification characteristics of sugarcane bagasse

  • Authors: Anukam, Anthony Ike
  • Date: 2013
  • Subjects: Bagasse -- Bagasse industry , Sugarcane -- Biotechnology , Computer simulation
  • Language: English
  • Type: Thesis , Masters , MSc (Chemistry)
  • Identifier: vital:11343 , http://hdl.handle.net/10353/d1016170 , Bagasse -- Bagasse industry , Sugarcane -- Biotechnology , Computer simulation
  • Description: Sugarcane is a major crop in many countries. It is the most abundant lignocellulosic material in tropical countries such as South Africa. It is one of the plants with the highest bioconversion efficiency. The sugarcane crop is able to efficiently fix solar energy, yielding some 55 tons of dry matter per hectare of land annually. After harvest, the crop produces sugar juice and bagasse. Sugarcane bagasse is a residue that results from the crushing of sugarcane in the sugar industry. It is a renewable feedstock that can be used for power generation and manufacturing cellulosic ethanol. As biomass, sugarcane bagasse holds promise as a fuel source since it can produce more than enough electricity and heat energy to supply the needs of a common sugar factory. However, in the sugarcane industry the bagasse is currently burnt inefficiently in boilers that provide the heating for the industry. This project seeks to investigate the possibility of gasifying sugarcane bagasse as an efficient conversion technology. The investigation is necessary because fuel properties govern the gasifier design and ultimately, the gasification efficiency. Proximate and ultimate analysis of sugarcane bagasse was conducted after which the results were used to conduct a computer simulation of the mass and energy balance during gasification. The kinetic investigation undertaken through the TGA and DTG analyses revealed the activation energy and pre – exponential factor which were obtained by the model – free Kissinger method of kinetic analysis and were found to be 181.51 kJ/mol and 3.1 × 103/min respectively. The heating value of sugarcane bagasse was also measured and found to be 17.8 MJ/kg, which was used in the calculation of the conversion efficiency of the gasification process. Fuel properties, including moisture content and gasifier operating parameters were varied in order to determine optimum gasifier operating conditions that results in maximum conversion efficiency. The highest conversion efficiency was achieved at low moisture content after computer simulation of the gasification process. Moisture content also affected the volume of CO and H2 as the former decreases with increasing moisture content while the latter increases with increasing moisture content, accelerating the water – gas reaction. Scanning electron microscope fitted to an Energy dispersive X – ray spectroscopy was also used in order to view the shape and size distribution as well as determine the elemental composition of sugarcane bagasse. The results obtained established that the fuel properties and gasification conditions affect the conversion efficiency. During computer simulation, it was established that smaller particle size resulted in higher conversion efficiency. The smaller throat diameter also resulted in higher conversion efficiency. The throat angle of 25° also resulted in higher conversion efficiency. The temperature of input air was also found to be one of the major determining factors in terms of conversion efficiency. The dissertation presents the proximate and ultimate analysis results as well as the kinetic analysis results. The SEM/EDX analysis as well as the computer simulation results of the gasification process is also presented. The major contribution of this project was on the investigation of the gasification characteristics of sugarcane bagasse and the utilization of these in the design of a laboratory scale sugarcane bagasse gasifier with enhanced conversion efficiency through computer simulation.
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  • Date Issued: 2013

Gaze behaviour of volleyball players during successful serve reception

  • Authors: Ramphomane-Aandahl, Bonolo
  • Date: 2013
  • Subjects: Gaze -- Psychological aspects , Visual perception , Volleyball players
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:10113 , http://hdl.handle.net/10948/d1021007
  • Description: The aim of this study was to identify and compare the gaze behaviour of both advancement levels (Advanced and Not Advanced) and genders (female and male) during successful serve reception. A quantitative, exploratory and quasi-experimental research design was used in which 50 ToppVolley Norway student athletes aged 16 to 19 years were sampled. The gaze behaviour of junior volleyball athletes was assesed as they received two types of serves (1 float and 1 top spin jump serve) and performed a forearm and/or overhead pass to a setter’s target while wearing an ASL mobile eye tracker. Gaze characteristics such as fixation number, fixation duration and areas of interest were used to achieve the aim of the study. The study found that Advanced participants differed from the Not Advanced athletes in employing fewer (9.70 ± 1.14 versus 10.77 ± 3.63 , p<.05, d>.20 ) fixations but for longer durations per fixations (1.64 ± 0.20 versus 1.60 ± 0.34, p<.05, d>.20 ) in receiving the float serve. Contrary, for the reception of the top spin jump serve, the Advanced athletes employed more fixations (12.11 ± 2.40 versus 11.83 ± 2.17, p<.05, d>.20 ) but for shorter durations per fixations (1.57 ± 0.26 versus 1.65 ± 0.34 sec, p<.05, d>.20 ) than the Not Advanced athletes. Male athletes in this study were more experienced than their female counterparts (5.97 ± 1.62 years versus 4.75 ± 1.59 years, p<.05, d>.20 ) with males employing more fixations than the females (11.02 ± 3.63 versus 9.19 ± 1.55 and 12.26 ± 2.46 versus 11.36 ± 1.69, p<.05, d>.20 ) for the float and top spin serves respectively but for shorter durations per fixation (1.62 ± 0.27 versus 1.76 ± 0.29 sec (float) and 1.56 ± 0.32 versus 1.73 ± 0.28 sec (top spin) p<.05, d>.20 ) than the female athletes. These results and findings suggests that Advanced athletes for both serves attended to the most appropriate visual information through the top-down approach, their knowledge and past experiences. For gender differences, the results show that the female athletes employed fewer fixation points in receiving float serves, however the employment of fewer fixation points during the top spin jump serves was due to receiving serves characterised by easily identifiable trajectories and lower speeds. The contradicting finding of the Advanced athletes employing more fixation points for the top spin jump serve may be due to task complexity demands. Thirteen areas of interests were also identified. The combined results for both gender and advancement levels suggest that the athletes fixated on similar areas of interests, primarily the upper body and secondary on the ball (flight), serve reception phase, arrival at target and contact point. The aim and objectives of this study were achieved in that both absolute and relative values for number of fixations, duration of fixations and areas of interest fixated on, were established. However the outcome of comparisons made, were not all expected particularly that of the Advanced group for the top spin jump serve. Possible explanations were offered, but further research is required in this regard.
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  • Date Issued: 2013

Gender and age differences between managers and employees on organisational commitment in selected factories in the Buffalo City Metropolitan area

  • Authors: Qwabe, Nombali Palesa
  • Date: 2013
  • Subjects: Employee loyalty -- South Africa -- Eastern Cape , Organizational commitment -- South Africa -- Eastern Cape , Sex discrimination -- South Africa -- Eastern Cape , Executives -- South Africa -- Eastern Cape , Employee morale -- South Africa -- Eastern Cape , Employee motivation -- South Africa -- Eastern Cape , Employee retention -- South Africa -- Eastern Cape , Labor turnover -- South Africa -- Eastern Cape , Organisational commitment , Affective commitment , Continuance commitment , Normative commitment , Gender differences , Age differences
  • Language: English
  • Type: Thesis , Masters , MCom (Industrial Psychology)
  • Identifier: vital:11557 , http://hdl.handle.net/10353/d1007117 , Employee loyalty -- South Africa -- Eastern Cape , Organizational commitment -- South Africa -- Eastern Cape , Sex discrimination -- South Africa -- Eastern Cape , Executives -- South Africa -- Eastern Cape , Employee morale -- South Africa -- Eastern Cape , Employee motivation -- South Africa -- Eastern Cape , Employee retention -- South Africa -- Eastern Cape , Labor turnover -- South Africa -- Eastern Cape , Organisational commitment , Affective commitment , Continuance commitment , Normative commitment , Gender differences , Age differences
  • Description: Employee commitment is one of the most important aspects that help an organisation achieve its desired goals. This study investigates the possible effects of gender and age differences between managers and employees on organisational commitment among lower-level employees in selected factories in the Buffalo City Metropolitan area. The organisational commitment instrument used in this research is the Meyer and Allen (1997) organisational commitment questionnaire which contains 18 items (6 items for each scale: affective commitment, continuance commitment and normative commitment). For this purpose, a sample of 100 lower-level employees was used. The results indicated significant differences in the unexpected directions in affective commitment and continuance commitment between male employees supervised by male managers and male employees supervised by female managers; male employees were found to have higher levels of affective and continuance commitment when supervised by female managers. Female employees were found to have a higher level of normative commitment when supervised by male managers than when supervised by female managers which was also in the unexpected direction. In addition, the study showed surprising results in terms of the social or cultural hypothesis where employees supervised by male managers and older managers were not significantly different in organisational commitment to those managed by female and by younger or same-age managers.
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  • Date Issued: 2013

Gender equality in the employment of senior secondary schools managers in the district of Butterworth

  • Authors: Bikitsha, Sakhiwo
  • Date: 2013
  • Subjects: Educational equalization -- South Africa -- Eastern Cape , Sex discrimination in education -- South Africa -- Eastern Cape , School management and organization
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:8489 , http://hdl.handle.net/10948/d1020005
  • Description: In terms of Section 9 of the Constitution of the Republic of South Africa of 1996, Chapter Two, the Bill of Rights, there should be gender equality amongst other things. In terms of Section15 (i) of the Employment Equity Act (Act 55 of 1998), there should be equal representation of suitably qualified people from the designated groups (blacks, women and people with disabilities) in all occupational categories and levels in the workforce. Section 15 (ii)provides that an employer who employs more than 50 employees must conduct a gender audit and make a gender equity plan and implement it when new employees are employed. In the Department of Education in the District of Butterworth, there is no gender equality in the number of senior secondary school managers. Men constituted 65 percent and women constituted 35 percent. The study investigated reasons for unequal representation of men and women as senior secondary school managers. The study was qualitative in design. The participants in the study were the Assistant Director of the Human Resource Section of the Department of Education and school governing body members, who were parents and educators. Interviews were used to collect data from the participants The study found that, amongst other things, gender equity was not considered when senior secondary schools managers were employed. That was why there was unequal representation of men and women in senior secondary schools’ management positions. This implied that those involved in the employment of secondary school managers in the district of Butterworth did not consider the Employment Equity Act (Act 55 of 1998) as a guide when employing senior secondary school managers in order to be able to achieve gender equality in this position. That was why there was unequal representation of men and women in senior secondary schools’ management positions.
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  • Date Issued: 2013

Gendered roles and social behaviour towards women in marginalised communities: the case of Newlands location in East London

  • Authors: Jilingisi, Ntombodidi
  • Date: 2013
  • Subjects: Equality -- South Africa -- East London , Sex discrimination against women -- South Africa -- East London , Interpersonal relations -- South Africa -- East London
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:9163 , http://hdl.handle.net/10948/d1020038
  • Description: This research study aims to investigate the impact of gender roles and social behaviour towards women in marginalised communities in Newlands Location. The researcher used a qualitative research method to conduct the study through interviews. The study has five chapters: Chapter 1 focuses on the introduction and the background of the study; Chapter 2 is the literature review, where it clarifies the meaning of gender inequality and discusses gender inequality in education, economic growth and violence against women; Chapter 3 is the description of the methods used in assessing the impact of gender inequality in Newlands Location and outlines the processes followed in the study'; Chapter 4 are the findings and the achievements of aim and objectives of the study; Lastly, Chapter 5 focuses on the Conclusion, Limitations and Recommendations of the study. Newlands location need a serious intermediation to address the gender inequality issues.
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  • Date Issued: 2013

Going beyond illustration of the Lovecraft novel at the mountains of madness

  • Authors: Vanderlinden, Cedric
  • Date: 2013
  • Subjects: Lovecraft, H. P. (Howard Phillips), 1890-1937. At the mountains of madness , Sublime, The, in art , Arts
  • Language: English
  • Type: Thesis , Masters , MTech
  • Identifier: vital:8533 , http://hdl.handle.net/10948/d1020950
  • Description: The research examines the relationship between the Sublime, the written works of H. P. Lovecraft, and the researcher’s production in the studio arts. It analyses how the Sublime is approached as a subject matter and principal objective within philosophical and artistic discourses, historically and within a contemporary paradigm. It also investigates the applicability of the Sublime to selected themes uncovered in H. P. Lovecraft’s work in general, and At the Mountains of Madness in particular. This is undertaken through an investigation of primary and secondary sources whose explorations and contextualization informs and supports the researcher’s practical visual studies. A reflective and critical analysis of this studio work is performed and included in the main body of the dissertation, from which a conclusion is drawn about the effectiveness of this approach. Specifically, the research explores the relevance of the Sublime both as a critical component of contemporary fine arts and as a fundamental element of the work of H. P. Lovecraft, At the Mountains of Madness in particular. In addition, the research’s practical component consists of a visual exploration of the intersection between the two. Furthermore, it represents an evaluation of this overlap in its effective translation across modes of expression, as interpreted through the medium of the researcher’s creative process.
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  • Date Issued: 2013

Governance and management of urban trees and green spaces in South Africa: ensuring benefits to local people and the environment

  • Authors: Chishaleshale, Mwale
  • Date: 2013
  • Subjects: Trees in cities -- South Africa , Urban forestry -- South Africa , Community forestry -- South Africa , City planning -- South Africa , Human-plant relationships -- South Africa , Urban ecology (Biology -- South Africa , Urban ecology (Sociology) -- South Africa , Natural resources -- South Africa , Trees in cities -- Law and legislation -- South Africa
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4739 , http://hdl.handle.net/10962/d1006035 , Trees in cities -- South Africa , Urban forestry -- South Africa , Community forestry -- South Africa , City planning -- South Africa , Human-plant relationships -- South Africa , Urban ecology (Biology -- South Africa , Urban ecology (Sociology) -- South Africa , Natural resources -- South Africa , Trees in cities -- Law and legislation -- South Africa
  • Description: In the face of rapid urbanization and global climate change, urban trees and green spaces (UTGS) can contribute to the welfare of people and the urban environment. Urban trees and green spaces can assist to address urbanization challenges related to environmental degradation. While functions of UTGS have been well documented in the developed world, they have not yet received full attention in much of sub-Saharan Africa. Consequently, UTGS are under threat from urban development and fragmentation. Notably, the problems associated with UTGS also fall into the governance realm and indications are that poor governance and management of UTGS can negatively influence the potential benefits of UTGS to local people and the environment. This formed a basis for this research. The main objective of the study was to determine the current governance and management approaches to UTGS in South Africa. Through document search and review, the study determined the governance institutions influencing UTGS at national level and at provincial level (in the Limpopo and Eastern Cape Provinces). Face-to-face and online survey methods were used to determine the extent to which 28 local municipalities had adopted planned, systematic and integrated management of UTGS. The snowball approach was used to determine the key actors involved in UTGS activities and interviews were conducted to establish the roles and capabilities of these actors. A total of 540 household interviews were conducted to determine the institutional factors influencing local peoples’ ability to access, plant and use UTGS. The findings of the study showed that UTGS have not been adequately covered in existing governance institutions and practice at national and provincial levels. Local government municipalities were not managing their UTGS in a planned or systematic manner due to constraining factors such as insufficient funds, insufficient personnel, lack of equipment and lack of political support. Only 7.1 % of the surveyed municipalities had an urban tree management plan and an estimate of the urban tree stock; 32.1 % had tree policies; 28.6 % had tree bylaws; 21.4 % had tree planting schedules; 10.7 % had tree maintenance schedules and only 3.6 % had tree inspection schedules. Key actors involved in UTGS activities differed among levels of government. The actors included national and provincial government departments, local government municipalities, Non-Governmental Organizations, private sector companies and local volunteers. Most of the actors, however, either planted trees or provided tree seedlings to municipalities and the local people. Tenure security was a key institutional factor affecting peoples’ ability to plant, use or even remove trees from their residential plots. The same applied to trees in the streets and public parks. Whereas most respondents did not require permission to plant (79.8 %) or remove (75 %) trees on their residential plots, a majority of them required permission to plant and remove trees from streets (over 70 %) and public parks (over 80 %). However, with regard to planting and removing urban trees in public open spaces, 54% of the respondents indicated that permission was not required suggesting a lack of clarity among local residents on the issue. Overall, the findings of this study indicate that there is no political recognition and support for UTGS at almost all levels of government. This has resulted in the lack of incorporation of UTGS in urban planning and development and has caused UTGS to receive limited funding to permit planned and systematic management. Given the current rates of urbanization and urban development, the lowly prioritised UTGS are vulnerable to exploitation. To conserve UTGS and promote their potential contribution to local people and the environment, UTGS must be recognized and placed on political and development agendas. There is a need to develop national guidelines for UTGS management, assess the extent of the urban forest resource in local municipalities, clearly define the roles and capabilities of different actors, integrate UTGS in the urban planning and development system, and most of all seek to involve the local people in overall management and governance of UTGS.
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  • Date Issued: 2013

Government debt levels and the systemic risks associated with post-crisis fiscal policies

  • Authors: Koekemoer, Jonathan
  • Date: 2013
  • Subjects: Finance, Public Debts, Public -- South Africa Fiscal policy Monetary policy -- South Africa
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: vital:1031 , http://hdl.handle.net/10962/d1004168
  • Description: The study analyses the concepts of intergenerational equity and fiscal sustainability in South Africa. The question raised is whether or not South Africa can adopt stimulatory fiscal measures, with a simultaneous increase in debt, so as to improve long-term growth potential in a sustainable manner without creating an excessive burden on future generations. The debate surrounding the use of stimulatory fiscal policy has come to the fore once again as monetary policy has become a restricted and ineffective macroeconomic policy tool in certain countries after the world-wide financial crisis and the Euro-debt crisis. Fiscal sustainability risks and high debt levels remain a source of concern in the United States and the Euro-zone, while South Africa presently seems to be at no great risk. With South Africa’s intention to become a developmental state, the use and appropriateness of fiscal policy is considered. An overlapping-generations model is used to determine whether or not future generations will be burdened due to current stimulatory policy. The use of fiscal rules in South Africa is discussed and considered in light of various political incentives and constraints. The conclusion given is that the possible use of a procedural fiscal rule, such as the ‘golden rule’, may add credibility to the current regime, while a numerical fiscal rule is seen as unnecessary given South Africa’s responsible use of fiscal policy thus far. As it stands, there is little possibility or risk that the public debt in South Africa will become too high in the near future. Although South Africa has been affected by the crisis, the developmental nature of the economy has been sustained through the use of responsible discretionary fiscal policy, putting South Africa in a positive position to meet its long-run growth potential.
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  • Date Issued: 2013

Green building guidelines at Nelson Mandela Metropolitan University

  • Authors: Smit, Gerrit
  • Date: 2013
  • Subjects: Sustainable buildings , Sustainable architecture -- South Africa -- Port Elizabeth , College campuses
  • Language: English
  • Type: Thesis , Masters , MTech
  • Identifier: vital:9697 , http://hdl.handle.net/10948/d1010974 , Sustainable buildings , Sustainable architecture -- South Africa -- Port Elizabeth , College campuses
  • Description: Although much research has been conducted on the greening of universities in the international context, not many studies focus on this topic in the South African context. A literature overview also identified that there are insufficient guidelines for green buildings at South African universities. Even though the Green Star rating tool is implemented in South Africa, no set of guidelines for green buildings exits at South African universities. The development of guidelines for green buildings at Nelson Mandela Metropolitan is a challenge which needs to be investigated. From the literature overview, it was possible to develop a framework containing seventeen green building aspects which could assist in developing green building guidelines. For this study, a two stage process was used to obtain information to evaluate green building guidelines critically at South African universities. Green building guidelines, as available at South African universities, were firstly explored by conducting a content analysis of all South African university websites. The information available on South African university websites regarding green buildings was scant and only two universities, namely the University of Cape Town and the University of Pretoria, reported that they had a green building. Stage two in the research process involved the empirical investigation of guidelines for green buildings at Nelson Mandela Metropolitan University. The results of the descriptive statistics showed that most building guidelines were perceived as important, but difficult to implement. The building guideline that was ranked the most important was the design of buildings that required low levels of maintenance or were maintenance free. The building guideline that was ranked the easiest to implement was to save energy in general. Considering the 17 suggested aspects and the five groups identified, a proposed set of green building guidelines was developed. The data gathered in this study is important as it could be utilised by the university to develop and implement the proposed green building guidelines.
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  • Date Issued: 2013

Growth and gonad size in cultured South African abalone, Haliotis midae

  • Authors: Riddin, Nicholas Alwyn
  • Date: 2013
  • Subjects: Haliotis midae -- South Africa , Haliotis midae fisheries -- South Africa , Abalone culture -- South Africa , Abalones -- Physiology -- South Africa , Abalones -- Growth -- South Africa , Abalones -- Feeding and feeds -- South Africa
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5180 , http://hdl.handle.net/10962/d1001651 , Haliotis midae -- South Africa , Haliotis midae fisheries -- South Africa , Abalone culture -- South Africa , Abalones -- Physiology -- South Africa , Abalones -- Growth -- South Africa , Abalones -- Feeding and feeds -- South Africa
  • Description: According to farm records, cultured Haliotis midae (50-70 g.abalone⁻¹) were growing 10% slower in winter when compared to summer. This reduction in growth rate also coincided with enlarged gonads. Initial trials showed that there were differences in mean monthly growth rates ranging from 1.97 – 5.14 g abalone⁻¹ month⁻¹, and gonad bulk index (GBI) also varied between months (GBI range: 26.88 ± 12.87 to 51.03 ± 34.47). The investment of energy into gonad tissue growth did not compromise whole body growth as the abalone continued to gain weight throughout the reproductive periods, probably due to gonadal growth. Growth of this size class of abalone was not influenced by water temperature or day length, suggesting favourable on-farm culture conditions (regression analyses, p > 0.05). There is no need to implement a seasonal dietary regime. Cultured H. midae were fed artificial diets with different protein sources, including only soya, only fishmeal, a combination of soya and fishmeal, and these were compared to kelp-fed abalone. Kelp-fed abalone grew slower than those fed artificial feeds (p>0.05). Gonad growth was the greatest when soya meal was included in the diet (average GBI: 74.91 ± 23.31), while the average gonad size of abalone fed the fishmealbased diet had gonads which were 38% smaller, and kelp-fed abalone had gonads which were 75% smaller than those of the abalone fed on diets containing soya meal. The increased gonad mass in abalone fed on diets including soya meal could be attributed to phytoestrogenic activity, as a result of the presence of isoflavones found in the soya plant; this remains to be tested. The use of soya in brood stock diet development is advised. The influence of dietary protein to energy ratio (1.41 – 2.46 g MJ⁻¹) on growth and gonad size was tested. Protein and energy levels within the ranges tested (22 and 33% protein; 13.5 and 15.6 MJ kg⁻¹) did not interact to influence growth rates of cultured H. midae. GBI increased from 50.67 ± 4.16 to 83.93 ± 9.35 units as a function of dietary protein to energy ratio (y = 42.02 x⁰·⁸¹; r² = 0.19; regression analysis: F₁¸₃₈ = 8.9; p = 0.005). In addition, protein level influenced gonad size, with gonad growth being greater in abalone fed the high protein diet (factorial ANOVA: F₁¸₃₂ = 7.1, p = 0.012). Canning yields were reduced by 7% when the protein content was increased, while increasing the quantity of dietary energy improved canning yields by ~ 6% (one-way ANOVA: F₁¸₂₈ = 14.4, p= 0.001). The present study provided evidence that although growth rates are varying seasonally, reproductive investment is not hindering weight gain. Gonad growth can be influenced if desired by farms, depending on the level of soya inclusion, as well as the protein to energy ratio in the diet. Monthly variation in growth and gonad size, as well as the influence of diet on gonad growth were highlighted, and the implications for farm application and further research were discussed.
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  • Date Issued: 2013

Guidelines for a therapeutic programme to address the mental health needs of adolescents being treated in a psychiatric hospital

  • Authors: Smith, Lourett
  • Date: 2013
  • Subjects: Teenagers , Psychiatric hospitals , Mental health facilities
  • Language: English
  • Type: Thesis , Masters , MCur
  • Identifier: vital:10036 , http://hdl.handle.net/10948/d1010963 , Teenagers , Psychiatric hospitals , Mental health facilities
  • Description: It is estimated that about 10 million children and adolescents worldwide, annually suffer from psychiatric disorders. They often require hospital treatment because they are not coping with their psychiatric condition at home or there is a lack of supervision. Suicide amongst adolescents who are experiencing a crisis is a bleak reality. In-patient treatment provides the necessary structure and supervision in order to secure a stable environment which is vital for treating adolescents. Treatment usually includes a therapeutic programme provided by members of the multi-professional team. Since there is at present no adolescent in-patient treatment facility in the Nelson Mandela Bay to provide psychiatric care to adolescents who are experiencing a mental problem, these patients are admitted to psychiatric hospitals which cater only for the needs of adult patients or they are referred to facilities in other provinces. The goals and objectives of this study are firstly, to explore and describe the perceptions of mental health professionals working in psychiatric hospitals regarding what should be included in a therapeutic programme for adolescents and secondly, to develop guidelines for treating adolescents that can be implemented in psychiatric hospitals in the Nelson Mandela Bay. The study followed a qualitative, exploratory, descriptive, contextual design. The research population included various professionals who provide services at psychiatric hospitals in the Nelson Mandela Bay. Purposive sampling was utilized. Semi-structured interviews were conducted to collect information-rich data and field notes were kept. The interviews were transcribed and Tesch’s eight steps of data analysis were followed to create meaning from the data collected. Themes were identified and grouped together to form new categories. An independent coder assisted with the coding process to ensure the trustworthiness of the findings. Literature was reviewed in order to identify research that was done previously regarding adolescent psychiatric in-patient programmes in order to bridge the gaps that were identified. The researcher ensured the validity of the study by conforming to Lincoln and Guba’s model of trustworthiness which consists of the following four constructs, namely, credibility, transferability, dependability and confirmability. The researcher ensured that the study was conducted in an ethical manner by adhering to ethical principles such as beneficence, justice and fidelity.
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  • Date Issued: 2013

Guidelines for the effective use of telemedicine in public healthcare in resource constrained settings

  • Authors: Kativu, Kevin
  • Date: 2013
  • Subjects: Telecommunication in medicine , Medical care- technology
  • Language: English
  • Type: Thesis , Masters , MTech
  • Identifier: vital:9820 , http://hdl.handle.net/10948/d1020061
  • Description: On September 8 2000, world leaders gathered at the United Nations summit and resolved to help citizens in the world's poorest countries to achieve a better life by the year 2015. This resolve was outlined in the Millennium Development Goals that were subsequently published with goals 4, 5 and 6 specific to healthcare. The integration of ICT‘s in the remote delivery of services has opened new avenues from which centralised, scarce resources can be accessed remotely for the benefit of the general population. Telemedicine has made great strides in the developed world with remote populations benefiting from the improved access to healthcare. In the Eastern Cape Province of South Africa, the sub-field of teleradiology has shown promise for enabling the wider delivery of specialist services. However, in resource constrained settings such as developing countries, telemedicine has had limited success and as a result, the equitable access to healthcare for remote populations remains inconceivable. This is exacerbated by the migration of healthcare professionals both domestically and internationally. The public sector has suffered the most with acute staff shortages in the public healthcare institutions, more so in rural and remote areas. This study identifies the prevailing challenges posing as barriers to the effective use of telemedicine services in the Public health sector in resource constrained settings and provides recommendations and guidelines aimed at facilitating the adoption and effective use of telemedicine. Challenges are identified from literature and from the first person accounts of specific role-players who are directly involved with telemedicine in their respective institutions. Participants are drawn from institutions offering telemedicine services within the Eastern Cape Province of South Africa. Challenges identified from literature are collated with those identified from the participant interviews to provide a concise list of factors that is used as input to the recommendation and guideline development process. The results thus far point to an enthusiastic environment coupled with a semi-capable infrastructure but however hampered by staff shortages and a general lack of support structures and propulsion mechanisms to adequately encourage the wider use of telemedicine. The proposed guidelines aim to address the challenges at the different role-player levels.
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  • Date Issued: 2013

Guidelines for the use of the Indie approach in game development projects in the context of a capstone experience

  • Authors: Marais, Craig
  • Date: 2013
  • Subjects: Computer games -- Design , Computer games -- Programming
  • Language: English
  • Type: Thesis , Masters , MTech
  • Identifier: vital:9824
  • Description: This research addresses the challenges associated with the supervision of game development projects as part of a capstone experience. The context of this research is the capstone experience as undertaken by third year software development students who have chosen to develop a game for their project at the School of Information and Communication Technology (ICT) at the Nelson Mandela Metropolitan University (NMMU). This research begins by determining the curricular requirements with respect to the capstone experience for Information Technology (IT) qualifications. This is done by investigating the applicable documentation at the international, national and departmental levels. The position of game development as a sub-category of software development is established and the Indie paradigm is investigated as a further sub-category of game development. Furthermore, the Indie paradigm is investigated through in-depth analyses of the techniques used in the development of ten Indie games. This investigation serves to identify the commonly used techniques in the Indie paradigm. The research presents a case study of the game development projects at the School of ICT at the NMMU for the period from 2009 to 2013. This case study combined with the techniques identifed from the Indie paradigm forms the basis of the guidelines presented by this research. The guidelines are subject to a review by an industry expert. The review takes the form of an expert interview, which serves to verify the guidelines. This research concludes by demonstrating alignment with the objectives it set out to achieve and motivating the success of the research conducted.
  • Full Text:
  • Date Issued: 2013

Hardware evolution of a digital circuit using a custom VLSI architecture

  • Authors: Van den Berg, Allan Edward
  • Date: 2013
  • Subjects: Digital electronics , Field programmable gate arrays , Sequential machine theory
  • Language: English
  • Type: Thesis , Masters , MEngineering (Mechatronics)
  • Identifier: vital:9661 , http://hdl.handle.net/10948/d1020984
  • Description: This research investigates three solutions to overcoming portability and scalability concerns in the Evolutionary Hardware (EHW) field. Firstly, the study explores if the V-FPGA—a new, portable Virtual-Reconfigurable-Circuit architecture—is a practical and viable evolution platform. Secondly, the research looks into two possible ways of making EHW systems more scalable: by optimising the system’s genetic algorithm; and by decomposing the solution circuit into smaller, evolvable sub-circuits or modules. GA optimisation is done is by: omitting a canonical GA’s crossover operator (i.e. by using an algorithm); applying evolution constraints; and optimising the fitness function. The circuit decomposition is done in order to demonstrate modular evolution. Three two-bit multiplier circuits and two sub-circuits of a simple, but real-world control circuit are evolved. The results show that the evolved multiplier circuits, when compared to a conventional multiplier, are either equal or more efficient. All the evolved circuits improve two of the four critical paths, and all are unique. Thus, it is experimentally shown that the V-FPGA is a viable hardware-platform on which hardware evolution can be implemented; and how hardware evolution is able to synthesise novel, optimised versions of conventional circuits. By comparing the and canonical GAs, the results verify that optimised GAs can find solutions quicker, and with fewer attempts. Part of the optimisation also includes a comprehensive critical-path analysis, where the findings show that the identification of dependent critical paths is vital in enhancing a GA’s efficiency. Finally, by demonstrating the modular evolution of a finite-state machine’s control circuit, it is found that although the control circuit as a whole makes use of more than double the available hardware resources on the V-FPGA and is therefore not evolvable, the evolution of each state’s sub-circuit is possible. Thus, modular evolution is shown to be a successful tool when dealing with scalability.
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  • Date Issued: 2013

Heavy metal content absorption and medicinal potential of Egeria densa (Planch.) Casp

  • Authors: Mgobozi, Vuyokazi
  • Date: 2013
  • Subjects: Medicinal plants -- South Africa -- Eastern Cape , Heavy metals -- Physiological effect -- South Africa -- Eastern Cape , Egeria densa -- South Africa -- Eastern Cape , Heavy metals -- Environmental aspects -- South Africa -- Eastern Cape , Phytochemicals -- South Africa -- Eastern Cape , Aquatic weeds -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MSc (Botany)
  • Identifier: vital:11309 , http://hdl.handle.net/10353/d1013121 , Medicinal plants -- South Africa -- Eastern Cape , Heavy metals -- Physiological effect -- South Africa -- Eastern Cape , Egeria densa -- South Africa -- Eastern Cape , Heavy metals -- Environmental aspects -- South Africa -- Eastern Cape , Phytochemicals -- South Africa -- Eastern Cape , Aquatic weeds -- South Africa -- Eastern Cape
  • Description: The contamination of heavy metals in the environment is a looming concern worldwide. Egeria densa (Planch) (Submerged aquatic plant) from two ponds: Site A with co-ordinates (32º 48’22.04”S; 26°48’58.79” E) and Site B with co-ordinates (32°48’33.25”S; 26°48’33.25”S) in Alice (Eastern Cape) was evaluated for its ability to absorb heavy metals, phytochemical constituents, antimicrobial activity and ultra-structure using standard analytic procedures. Cadmium (Cd), copper (Cu), iron (Fe), lead (Pb), manganese (Mn), and zinc (Zn) were measured in water, sediments and plant. The concentrations of these metal elements were determined with use of Inductively Coupled Plasma- Optical Emission Spectrometry (ICP-OES). In sediments, the heavy metals (mg/kg) decreased in the order of their average concentration as follows: Fe (40.320) > Zn (1.259) > Pb (0.564) > Mn (0.186) > Cu (0.037) in Pond 1 whereas in Pond 2 Fe (61.527) > Cd (0.999) > Mn (0.648) > Pb (0.586) > Zn (0.156) > Cu (0.045). The highest concentration of Fe was detected in both sites and Cu being the least. The concentrations of the metals in the plants sample (from Pond 1) were found in order of Mn > Pb > Cu > Fe whereas cadmium and zinc were not detected, while the concentration in Pond 2 decreases in order of Zn > Mn > Pb > Cd > Fe > Cu. In the water samples, concentrations of heavy metals (mg/L) decreased in the order of their average concentrations as follows: Pb (35.36) > Fe (3.07) > Mn (0.238) > Cu (0.104), both cadmium and zinc were below the limit of detection in Pond 1, whereas in Pond 2 the concentrations decreased as follows: Pb (13.033) >Fe (1.69) > Cu (0.270) > Mn (0.248) > Cd (0.004) and Zinc was not detected. Phytochemical analyses of the plant extracts revealed the presence of phenols, flavonoids, proanthocyanidin, flavonols, saponins, alkaloid and tannins in all the extracts (water, acetone and n-hexane). Both acetone and water extracts, showed high concentration of proanthocyanidin, while tannin was the lowest in acetone extract. Antimicrobial evaluation using, Gram positive (Staphylococcus aureus, Bacillus pumilus, Bacillus cereus, Streptococcus pyogenes, Enterococcus faecalis) and Gram negative (Klebsiella pneumonia, Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris and Serratia marcescens) bacteria showed negative results for all the strain, except Streptococcus pyogenes which was inhibited at MIC of 0.1 mg/ml. Scanning electron microscopy (SEM) of ultra-structure of Egeria densa, showed that certain bacteria attached to the leaf, However more work has to be done on E. densa to verify the mechanism by which it accumulates heavy metals. The study shows that E. densa has a potential of accumulating heavy metals especial Manganese in plant.
  • Full Text:
  • Date Issued: 2013

High-performance organisational assessment : a South African case study

  • Authors: Hattingh, Christiaan Arnoldus
  • Date: 2013
  • Subjects: Organizational effectiveness -- South Africa -- Measurement , Comparative organization
  • Language: English
  • Type: Thesis , Masters , MBA
  • Identifier: vital:8865 , http://hdl.handle.net/10948/d1020249
  • Description: A fundamental shift occurred in the global economy during the last three decades and even more so in the period since the 2008 financial crises. As a result of the advancing technology, national economies no longer self-contained entities protected from international competition by geographical distances, times zones, languages barriers, government regulations and culture or business systems. The effect of globalisation has further manifested in the global economic slow-down since 2008, where spending is constrained and consumers have become more discerning in their value considerations. The dual challenge of globalisation of competition and global economic slow-down is increasingly forcing businesses to do some introspection not only in terms of their cost structures, but also in terms of their value propositions in search of sustainable organisational success. Given the limited influence that businesses have over its external environment, an internal perspective is proposed where this problem is approached by means of a high-performance evaluation case study. The aim is to identify constraints that have resulted from more recent responses to market challenges and to establish which interventions to elevate in order to alleviate such constraints. It is proposed that if management and organisational practices that organisations employ in their daily functions affect the discretionary effort that employees contribute, then organisations should be able to gain insight into variations in organisational performance through evaluating and understanding these practices. This treatise focusses on organisational characteristics that drive high performance and propose interventions to enhance the environment for the development of a high performance culture within a single organisation. The research topic fell within the quantitative paradigm with data being collected through the use of a questionnaire. The results were analysed and interpreted to ascertain how current practice aligns with the theory. Recommendations are submitted within the context of the prevailing literature on the subject of high performance organisations and the related high performance characteristics of the organisation as based on the empirical data.
  • Full Text:
  • Date Issued: 2013

High-throughput modelling and structural investigation of cysteine protease complexes with protein inhibitors

  • Authors: Kroon, Matthys Christoffel
  • Date: 2013
  • Subjects: Cysteine proteinases Cysteine proteinases -- Inhibitors Papain Cystatins Malaria -- Chemotherapy Homology (Biology) Protein-protein interactions
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:3885 , http://hdl.handle.net/10962/d1001619
  • Description: The papain-like cysteine protease family (C1 proteases) is highly important because of its involvement in research and industrial applications and its role in various human diseases. Protein inhibitors are an important aspect of C1 protease biology and are relevant to its clinical, industrial and research importance. To study the interaction between the proteases and the inhibitors it is very useful to have accurate structural models of the protease-inhibitor complexes. To this end, a high-throughput pipeline for modelling complexes of papain-like cysteine proteases and protein inhibitors was implemented and tested (Tastan Bishop & Kroon, 2011). The pipeline utilizes a novel technique for obtaining modelling templates by using superpositioning to combine coordinates from separate experimental structures. To test the pipeline, models of complexes with known structures (test set) were modelled using many different templates and the resultant models evaluated to compare the quality of the different templates. It was found that use of the new technique to obtain templates did not introduce significant errors, while allowing closer homologs to be used for modelling - leading to more accurate models. The test set models were also used to evaluate certain steps of the modelling protocol. The effect of Rosetta energy minimization on model accuracy and the use of Rosetta energy and DOPE Z-score values to identify accurate models were investigated. Several complexes were then modelled using the best available templates according to criteria informed by the previous results. A website was built that allows a user to download any of the metrics or models produced in the study. This website is accessible at http://rubi.ru.ac.za/cpmdb
  • Full Text:
  • Date Issued: 2013
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