Showing items 1 - 9 of 9

Your selections:

Information security and the dark side of trust

Electronic communication continuity planning from the perspective of an individual

  • Authors: Fouché, Jacques
  • Date: 2012
  • Subjects: Electronic systems , Internet
  • Language: English
  • Type: Thesis , Masters , MTech
  • Identifier: vital:9802 , http://hdl.handle.net/10948/d1012270 , Electronic systems , Internet
  • Description: It is beyond doubt that technology has changed the way people in modern society live their daily lives. While a modern society eagerly adopts new technology, the loss of the services provided by these technologies is hardly ever considered. Therefore, this research project will evaluate the importance of communication technology and how critical it is for an individual. Furthermore, this research will provide a framework to improve the availability of current communication technologies from the perspective of the individual.
  • Full Text:
  • Date Issued: 2012

Web-based visualisation techniques for reporting zoonotic outbreaks

  • Authors: Ncube, Sinini Paul
  • Date: 2012
  • Subjects: Zoonoses -- Reporting , Communicable diseases -- Reporting , Communication in medicine , Medical telematics , Internet , Information visualization
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4664 , http://hdl.handle.net/10962/d1006672 , Zoonoses -- Reporting , Communicable diseases -- Reporting , Communication in medicine , Medical telematics , Internet , Information visualization
  • Description: Zoonotic diseases are diseases that are transmitted from animals or vectors to humans and vice versa. The public together with veterinarian authorities should readily access disease information as it is vital in rapidly controlling resultant zoonotic outbreak threats through improved awareness. Currently, the reporting of disease information in South Africa is predominantly limited to traditional methods of Information Communication Technologies (ICTs) like faxes, monthly newspaper reports, radios, phones and televisions. Although these are effective ways of communication, their disadvantage is that the information that most of them offer can only be accessed at specific times during a crisis. New technologies like the internet have become the most efficient way of distributing information in near-real-time. Many developed countries have used web-based reporting platforms to deliver timely information through temporal and geographic visualisation techniques. There has been an attempt in the use of web-based reporting in South Africa but most of these sites are characterised by heavy text which makes them time consuming to use or maintain. As a result most sites have not been updated or have ceased to exist because of the work load involved. The success of web reporting mechanisms in developed countries offers evidence that web-based reporting systems when appropriately visualised can improve the easy understanding of information and efficiency in the analysis of that data. In this thesis, a web-based reporting prototype was proposed after gathering information from different sources: literature related to disease reporting and the visualisation of infectious diseases; the exploration of the currently deployed web systems; and the investigation of user requirements from relevant parties. The proposed prototype system was then developed using Adobe Flash tools, Java and MySQL languages. A focus group then reviewed the developed system to ascertain that the relevant requirements had been incorporated and to obtain additional ideas about the system. This led to the proposal of a new prototype system that can be used by the authorities concerned as a plan to develop a fully functional disease reporting system for South Africa.
  • Full Text:
  • Date Issued: 2012

Negotiating identity in an online virtual environment

  • Authors: Dube, Nompumelelo
  • Date: 2011-11
  • Subjects: Online Identities , Internet , Personal Information Managenment
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10353/23883 , vital:61284
  • Description: This study investigates ways in which people in an online anonymous virtual environment use language to negotiate and manage their identities. The study is informed by the tenets of social constructionism, a theory that explores the problematic manner in which the self is taken for granted as unchanging (Burr, 1998). One point made by alternative theorists other than social constructionist theorists is the notion of the “essential self”; one tenet of social constructionist theory suggests that the “essential self” of a person remains fluid. The implication is that one ultimately changes as each day passes, for example at the core of one’s personality is an “essential self” that changes with experiences, conflicts and/or age (Tuffin, 2005). From a social constructionist perspective, the self is more fractured and contingent on life’s circumstances. This theory was found to be an appropriate paradigm from which to study anonymous online identities, where individuals were found to create and negotiate certain identities outside of those identities that people often find important to portray to outsiders in the general public. Sixty-seven (67) students from different races participated in this study and online discussions from a course discussion forum, “blackboard”, were monitored. This study found that one’s identity is negotiated in an anonymous virtual environment. Data was collected from these discussions and was analysed using Potter and Wetherell’s (1987) method of discourse analysis. Research findings ultimately found that people use discursive strategies in negotiating and maintaining their identity online, but that distinct racial characteristics were noticeable despite some attempts to mask one’s background. , Thesis (MA) -- Faculty of Social Sciences and Humanities, 2011
  • Full Text:
  • Date Issued: 2011-11

Dynamic adaptive cost model for wireless Internet connectivity in African rural communities

  • Authors: Sibanda, Khulumani
  • Date: 2010
  • Subjects: Internet , Community development -- South Africa -- Eastern Cape , Cost effectiveness , Wireless communication systems , Rural development -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Doctoral , PhD (Computer Science)
  • Identifier: vital:11389 , http://hdl.handle.net/10353/380 , Internet , Community development -- South Africa -- Eastern Cape , Cost effectiveness , Wireless communication systems , Rural development -- South Africa -- Eastern Cape
  • Description: In today’s dynamic technological landscape, wireless communication networks have become an important part of economic development. The emergence of wireless technologies raises hopes to extend communication to remote areas that have not seen any tangible deployment to date. As developing nations pin their hopes to wireless technologies, cost models for wireless communication networks are becoming vital to support the emerging technologies. However, varying cost changes raise critical challenges to the estimation of both capital expenditure and operational expenditure. The network deployment process has numerous events that may cause adjustments to initially estimated project costs. These adjustments are necessary for a cost management plan and this plan includes monitoring cost performance and ensuring that only appropriate changes are made to the network project. The incidents that may cause cost changes can not be entirely predicted as their distribution tend to change dynamically from time to time. Estimating network deployment costs in such a dynamic environment necessitates cost models that can adapt to random occurrence of cost changes. Widely used cost models are usually performed by experienced personnel whose engineering experience is derived from deploying similar networks. In this approach experienced personnel add a certain percentage to the cost estimate to cater for contingency costs. Certainly such an approach depends on individual opinion, making it subjective and void of mathematical estimating relationships which are of paramount importance in ensuring that estimated deployment costs are sufficient to deal with cost uncertainties. We observe that existing approaches can only explore a limited solution space and hence can lead to cost overruns if implemented in dynamically cost changing environments. This thesis presents a wireless communication network deployment cost model that incorporates uncertainties into the final cost estimate. The model is adaptive to unpredictable cost changes since it allows adjustments of confidence levels when calculating contingency costs. This allows dynamically updating the cost changes without the cost model being reconstructed from scratch. We make use of the Poisson process in modeling the occurrence of incidents that are responsible for causing cost changes during network deployment. We also show that the occurrence of the incidents causing cost change are random and tend to follow the Poisson distribution. Using different levels of confidence we model various cost contingencies and make sensitivity analyses to identify the probability of cost overrun when given different contingencies. The dynamic adaptive cost model can be used either at the strategic level to understand the cost of a particular technique or at the operational level, as a way to show how Poisson process in network deployment can compare with engineering experience and other estimating techniques. We believe that the model is useful for remote areas where deployment costs are volatile and the distribution of incidents causing cost change to original cost estimates are diverse and dynamically changing. Further we expect that our research improves the knowledge base of information about the costs for rural communities to connect to the Internet, consequently providing useful input to future policy debates. This work is further poised to be a utility function to help those planning internet infrastructure deployments in least developed regions.
  • Full Text:
  • Date Issued: 2010

Small hospitality enterprises and the internet: an IT governance model for conducting business online

  • Authors: Ngoqo, Bukelwa
  • Date: 2010
  • Subjects: Hospitality industry -- South Africa , Tourism -- South Africa , Organizational effectiveness -- South Africa , Electronic commerce , Internet , Risk management , Electronic data processing
  • Language: English
  • Type: Thesis , Masters , MCom (Information Systems)
  • Identifier: vital:11133 , http://hdl.handle.net/10353/382 , Hospitality industry -- South Africa , Tourism -- South Africa , Organizational effectiveness -- South Africa , Electronic commerce , Internet , Risk management , Electronic data processing
  • Description: The Internet has made a considerable impact on how business is conducted. Empowered by technology consumers are using the Internet as a tool to communicate and transact online. E-commerce (electronic commerce) presents opportunities for business to gain a competitive advantage, however it also posses certain challenges. Small and Medium Hospitality Enterprises (SMHEs) sector within the tourism industry, is one of the sectors which stands to benefit from using the Internet for business. Researchers agree that the contribution made by the tourism sector in developing economies is substantial. However, SMHEs are noted for their failure to derive optimal benefits from using the Internet for business to improve their competitiveness. This study which seeks to develop a model for use by SMHEs as a guide when making the decision to adopt technology was necessitated by the importance of SMHE’s contribution in the economy of developing countries. This model is based on the examination of existing theories and models such as; the Delone and McLean IS success model (2004), and the ITGI’s (2007) IT governance focus areas model. To elicit the desired outcomes, additional data was collected using questionnaires, interviews, and observations. The collected data was analysed and resulted in the development of a model that can be used by SMHEs in order to derive value from IT and to gain a competitive advantage.
  • Full Text:
  • Date Issued: 2010

An investigation into the design and implementation of an internet-scale network simulator

  • Authors: Richter, John Peter Frank
  • Date: 2009
  • Subjects: Computer simulation , Computer network resources , Computer networks , Internet
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4597 , http://hdl.handle.net/10962/d1004840 , Computer simulation , Computer network resources , Computer networks , Internet
  • Description: Simulation is a complex task with many research applications - chiey as a research tool, to test and evaluate hypothetical scenarios. Though many simulations execute similar operations and utilise similar data, there are few simulation frameworks or toolkits that allow researchers to rapidly develop their concepts. Those that are available to researchers are limited in scope, or use old technology that is no longer useful to modern researchers. As a result of this, many researchers build their own simulations without a framework, wasting time and resources on a system that could already cater for the majority of their simulation's requirements. In this work, a system is proposed for the creation of a scalable, dynamic-resolution network simulation framework that provides scalable scope for researchers, using modern technologies and languages. This framework should allow researchers to rapidly develop a broad range of semantically-rich simulations, without the necessity of superor grid-computers or clusters. Design and implementation are discussed and alternative network simulations are compared to the proposed framework. A series of simulations, focusing on malware, is run on an implementation of this framework, and the results are compared to expectations for the outcomes of those simulations. In conclusion, a critical review of the simulator is made, considering any extensions or shortcomings that need to be addressed.
  • Full Text:
  • Date Issued: 2009

Exploring new terrain - tackling a tri-media approach to the 1999 election: an analysis of online coverage of elections by media organisations in their respective countries and recommendations for multi-platform publishing within the South African Broadcasting Corporation to cover the national election

  • Authors: Naidoo, Kameshnee
  • Date: 1999
  • Subjects: South African Broadcasting Corporation , Elections , Journalism -- Political aspects -- South Africa , Mass media -- Political aspects -- South Africa , Internet , Electronic news gathering , Television broadcasting of news -- Political aspects
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:3473 , http://hdl.handle.net/10962/d1002928 , South African Broadcasting Corporation , Elections , Journalism -- Political aspects -- South Africa , Mass media -- Political aspects -- South Africa , Internet , Electronic news gathering , Television broadcasting of news -- Political aspects
  • Description: This study attempts to analyse the way foreign media organisations have used the Internet to inform, educate and mobilise citizens for participation in their national election. These foreign experiences provide a framework with which to analyse the implications for the SABC as a public broadcaster of the next elections in South Africa. The research was informed by theories of media and democracy. One of the most powerful features of the new technology is its technical ability to facilitate an interactive flow of information. This research examines the concept of cyberdemocracy and the implications for the SABC, especially as it is planning on launching an online election strategy. The democratic roles of journalism and the implications for the SABC are also discussed. As a public service broadcaster, the SABC is bound to educate, inform, and mobilise voters for participation, build community and national identity and scrutinise the poll in the interests of transparency, accountability and fair play. International journalists are advocating a new type of journalism, called public or civic journalism, which combines these roles. This research draws primarily on qualitative research methods, using a case study methodology. It draws upon direct observation and interview methodology in the fieldwork. However, it also uses some quantitative methods in the analysis of the websites and the SABC research.Finally, the research analyses the situation at the SABC and provides recommendations for the election website within this context.
  • Full Text:
  • Date Issued: 1999

An investigation into some critical computer networking parameters : Internet addressing and routing

  • Authors: Isted, Edwin David
  • Date: 1996
  • Subjects: Computer networks , Internet , Electronic mail systems
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4608 , http://hdl.handle.net/10962/d1004874 , Computer networks , Internet , Electronic mail systems
  • Description: This thesis describes the evaluation of several proposals suggested as replacements for the currenT Internet's TCPJIP protocol suite. The emphasis of this thesis is on how the proposals solve the current routing and addressing problems associated with the Internet. The addressing problem is found to be related to address space depletion, and the routing problem related to excessive routing costs. The evaluation is performed based on criteria selected for their applicability as future Internet design criteria. AIl the protocols are evaluated using the above-mentioned criteria. It is concluded that the most suitable addressing mechanism is an expandable multi-level format, with a logical separation of location and host identification information. Similarly, the most suitable network representation technique is found to be an unrestricted hierarchical structure which uses a suitable abstraction mechanism. It is further found that these two solutions could adequately solve the existing addressing and routing problems and allow substantial growth of the Internet.
  • Full Text:
  • Date Issued: 1996
  • 1
  • Disclaimer
  • Privacy
  • Copyright
  • Contact