Water resources in Botswana with particular reference to the savanna regions
- Authors: du Plessis, A J E , Rowntree, Kate M
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6676 , http://hdl.handle.net/10962/d1006654
- Description: Production and development in the savanna regions of southern Africa are primarily determined by interactions between the limitations imposed by ecological determinants (such as rainfall and soil quality) and the management strategies of the specific region. Good planning, focussing on both the short and long-term effects of water use, is needed in water management strategies. Botswana is already experiencing so-called 'water stress' which is related to a number of factors such as rapidly increasing population leading to a sharp increase in water demand, low and variable rainfall, high rates of evaporation, and the high cost of exploiting existing water resources. At the current rates of abstraction, the lifetime of surface and groundwater resources is limited to decades. Botswana shares four river basins with its neighbouring countries. This results in a situation where 94% of the fresh water resources which Botswana can theoretically access originates outside its borders, making water resource management highly complex. Transnational sharing and management of water resources, therefore, plays a major role in securing sustainability of this precious resource.
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- Date Issued: 2003
Weblogging is ‘We Media’:
- Authors: Kyazze, Simwogerere
- Date: 2003
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159134 , vital:40270 , https://hdl.handle.net/10520/EJC146248
- Description: "Blogging technology has begun to deliver on some of the wild promises about the Internet that were heard in the 1990s," wrote Matt Welch in the September/October issue of Columbia Journalism Review, America's leading media monitor published by the Graduate School of Journalism at Columbia University.
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- Date Issued: 2003
Where the global meets the local : South African youth and their experience of global media
- Authors: Strelitz, Larry Nathan
- Date: 2003
- Subjects: Mass media and youth -- South Africa Mass media -- Sociological aspects Mass media and culture -- South Africa Youth -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3290 , http://hdl.handle.net/10962/d1003078
- Description: Within the context of debates concerning the impact of global media on local youth, this study explores how a sample of South African youth responds to texts which were produced internationally, but distributed locally. Recognising the profound rootedness of media consumption in everyday life, the research examines the way these youth, differentially embedded in the South African economic and ideological formation, use these texts as part of their ongoing attempts to make sense of their lives. The study rejects the 'either/or' formulations that often accompany competing structuralist and culturalist approaches to text/audience relationships. Instead, using a combination of quantitative and qualitative research methods, it seeks to highlight the interplay between agency and structure, between individual choice and the structuring of experience by wider social and historical factors. The findings of the study point to the complex individual and social reasons that lie behind media consumption choices, and the diverse (and socially patterned) reasons why local audiences are either attracted to, or reject, global media. These and other findings, the study argues, highlight the deficiencies of the media imperialism thesis with its definitive claims for cultural homogenisation, seen as the primary, or most politically significant, effect of the globalisation of media. As such, this study should be read as a dialogue with those schools of thought that take a more unequivocal point of view on the impact of globalised media culture.
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- Date Issued: 2003
Why we need Di Versity the Superjourno:
- Authors: Garman, Anthea
- Date: 2003
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158740 , vital:40224 , https://hdl.handle.net/10520/EJC146308
- Description: Training and education is a serious subject, and there are thousands (millions) of words to be said about it. But when you're putting a magazine together you need visuals too, and how do you illustrate this subject?.
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- Date Issued: 2003
WSP3: a web service model for personal privacy protection
- Authors: Ophoff, Jacobus Albertus
- Date: 2003
- Subjects: Data protection , Computer security , Privacy, Right of
- Language: English
- Type: Thesis , Masters , MTech (Information Technology)
- Identifier: vital:10798 , http://hdl.handle.net/10948/272 , Data protection , Computer security , Privacy, Right of
- Description: The prevalent use of the Internet not only brings with it numerous advantages, but also some drawbacks. The biggest of these problems is the threat to the individual’s personal privacy. This privacy issue is playing a growing role with respect to technological advancements. While new service-based technologies are considerably increasing the scope of information flow, the cost is a loss of control over personal information and therefore privacy. Existing privacy protection measures might fail to provide effective privacy protection in these new environments. This dissertation focuses on the use of new technologies to improve the levels of personal privacy. In this regard the WSP3 (Web Service Model for Personal Privacy Protection) model is formulated. This model proposes a privacy protection scheme using Web Services. Having received tremendous industry backing, Web Services is a very topical technology, promising much in the evolution of the Internet. In our society privacy is highly valued and a very important issue. Protecting personal privacy in environments using new technologies is crucial for their future success. These facts, combined with the detail that the WSP3 model focusses on Web Service environments, lead to the following realizations for the model: The WSP3 model provides users with control over their personal information and allows them to express their desired level of privacy. Parties requiring access to a user’s information are explicitly defined by the user, as well as the information available to them. The WSP3 model utilizes a Web Services architecture to provide privacy protection. In addition, it integrates security techniques, such as cryptography, into the architecture as required. The WSP3 model integrates with current standards to maintain their benefits. This allows the implementation of the model in any environment supporting these base technologies. In addition, the research involves the development of a prototype according to the model. This prototype serves to present a proof-of-concept by illustrating the WSP3 model and all the technologies involved. The WSP3 model gives users control over their privacy and allows everyone to decide their own level of protection. By incorporating Web Services, the model also shows how new technologies can be used to offer solutions to existing problem areas.
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- Date Issued: 2003
‘South Africa's Vietnam’? Literary History and Cultural Memory of the Border War
- Authors: Baines, Gary F
- Date: 2003
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/126987 , vital:35941 , https://doi.10.1080/17533170400505305
- Description: Density, population structure, growth, mortality and aspects of reproduction of the non-native amphipod Platorchestia platensis were studied for 20 consecutive months (October 2008 to May 2010) in the supralittoral wrack of the Knysna Estuary, South Africa. Amphipod density varied over the sampling period with the lowest numbers recorded in summer (January and February). Ovigerous females with embryos, and juveniles were found in most months with peaks in recruitment found in both April and October, suggesting that in Knysna this species is a biannual breeder. Average female size was significantly greater in winter, with larger females tending to brood more embryos. The largest adults (13.5 mm total length) were always male although the monthly sex ratio was nearly always female biased. Growth rate estimated from a cohort analysis was about 1 mm per month and monthly survival about 69%. The ability to reproduce all year round may be one reason why this introduced species has become established within this warm temperate estuary.
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- Date Issued: 2003