For the past few decades researchers, development agencies and government have focussed on the use of Information and Communication Technologies to improve the socio-economic status of people in underdeveloped rural communities. In recent years there has been remarkable recognition of the importance of developing systems that address the specific needs of rural communities. Education, health, commerce, government and agriculture are amongst the needs of rural communities that could well be addressed by these systems. System development is a complex process and studies have shown that if poorly conducted, the process could lead to the failure of the system being developed. Due to differences in context and application, the processes followed in the development of the rural community systems need to differ from those of commercial applications. One such difference is the choice of the Information System Development Methodology (SDM) used. Following a methodical approach to Information Systems development is important as it improves discipline, standardization and monitoring of a quality system. There are hundreds of SDM available for use during development and choosing the wrong SDM has been linked to problems such as systems being delivered late, being over budget or not meeting the needs of the users. Developing systems for disadvantaged communities is different from developing system for organisations or even affluent communities. Some of the challenges that developers encounter include lack of structure, poor computer literacy, and poor infrastructure. Lack of user involvement during system development has been linked to system failures. A Living Labs approach to socio-economic development is aimed at involving multiple stakeholders towards improving the living standards. Developing Community Information Systems aimed at solving varying community problems is one of the objectives of the Living Labs. There are only few CISs that are fully operational from South African Living Labs, and a number of systems developed are not in use. Poor user involvement and lack of use of system development are some of the reasons for system failures. The purpose of this study is to evaluate the use and effectiveness of System Development Methodologies when developing community information systems aimed at socio-economic development of disadvantaged communities. To achieve the objectives of this study, an interpretive, multiple case study research was conducted in three Living Labs around South Africa. To improve the chances for success during the development of Community Information Systems for use by disadvantage communities, this study proposes a framework for evaluating use and effectiveness of SDMs. The second output of the Study is an SDM framework that could be adopted specifically for Living Labs which adopts an agile approach and prototyping. These frameworks takes into account the social attributes of people in disadvantaged communities, the nature of the living lab, the nature of the systems being developed and the role of the users in the systems being developed. / PhD (Computer Science), North-West University, Potchefstroom Campus, 2014

For the past few decades researchers, development agencies and government have focussed on the use of Information and Communication Technologies to improve the socio-economic status of people in underdeveloped rural communities. In recent years there has been remarkable recognition of the importance of developing systems that address the specific needs of rural communities. Education, health, commerce, government and agriculture are amongst the needs of rural communities that could well be addressed by these systems. System development is a complex process and studies have shown that if poorly conducted, the process could lead to the failure of the system being developed. Due to differences in context and application, the processes followed in the development of the rural community systems need to differ from those of commercial applications. One such difference is the choice of the Information System Development Methodology (SDM) used. Following a methodical approach to Information Systems development is important as it improves discipline, standardization and monitoring of a quality system. There are hundreds of SDM available for use during development and choosing the wrong SDM has been linked to problems such as systems being delivered late, being over budget or not meeting the needs of the users. Developing systems for disadvantaged communities is different from developing system for organisations or even affluent communities. Some of the challenges that developers encounter include lack of structure, poor computer literacy, and poor infrastructure. Lack of user involvement during system development has been linked to system failures. A Living Labs approach to socio-economic development is aimed at involving multiple stakeholders towards improving the living standards. Developing Community Information Systems aimed at solving varying community problems is one of the objectives of the Living Labs. There are only few CISs that are fully operational from South African Living Labs, and a number of systems developed are not in use. Poor user involvement and lack of use of system development are some of the reasons for system failures. The purpose of this study is to evaluate the use and effectiveness of System Development Methodologies when developing community information systems aimed at socio-economic development of disadvantaged communities. To achieve the objectives of this study, an interpretive, multiple case study research was conducted in three Living Labs around South Africa. To improve the chances for success during the development of Community Information Systems for use by disadvantage communities, this study proposes a framework for evaluating use and effectiveness of SDMs. The second output of the Study is an SDM framework that could be adopted specifically for Living Labs which adopts an agile approach and prototyping. These frameworks takes into account the social attributes of people in disadvantaged communities, the nature of the living lab, the nature of the systems being developed and the role of the users in the systems being developed. / PhD (Computer Science), North-West University, Potchefstroom Campus, 2014

A UML é uma linguagem de modelagem largamente aceite entre profissionais da área de computação para a modelagem de sistemas simples e complexos. Tomando em consideração que os objetos de aprendizagem são entidades digitais, para o seu desenvolvimento, a utilização de metodologias torna-se um imperativo, se o objetivo for o de oferecer ao setor de educação ferramentas capazes de apoiar o processo de ensino aprendizagem. Os objetos de aprendizagem são ferramentas que podem contribuir para o aluno alcançar a aprendizagem significativa, se forem desenvolvidos dentro dos parâmetros considerados facilitadores da aprendizagem significativa. A presente pesquisa propõe uma metodologia alicerçada na aprendizagem significativa, denominada Metodologia de Modelagem de objetos de aprendizagem em UML (MOAUML) baseada em princípios de UML e de Design Instrucional, para a modelagem de objetos de aprendizagem, com vista a facilitar o desenvolvimento de objetos de aprendizagem que favoreçam a aprendizagem. Objetivando a validação da metodologia, equipes com diferentes perfis profissionais, modelaram 9 objetos de aprendizagem entre novos e legados. O resultado das modelagens mostrou que a utilização da MOAUML contribui para a facilidade na modelagem de objetos de aprendizagem, embora tenha sido mais fácil para equipes que já estavam familiarizadas com métodos de modelagem de software. / The UML is a widely accepted modelling language among computer specialists from simple to complex systems. In order to develop learning objects as digital entities, it is very important the utilization of any methodology aiming to deliver to the education sector capable tools for supporting the process of teaching learning. The learning objects are powerful tools that can contribute for student’s achievement of meaningful learning. This fact can be true only if the development procedures satisfied some characteristics considered facilitators of meaningful learning. This study proposes a methodology based on the meaningful learning, designated Modelling of Learning Objects Using UML (MOAUML) based on principles of UML and Instructional Design, for the modelling of learning objects targeting to facilitate the development of learning objects that promote meaningful learning. In order to validate the MOAUML, different teams with distinguish profiles, were modelled 9 learning objects among news and legacies. The results of that process disclosed that the use of MOAUML contributes to the ease of modelling learning objects, although it has been easier for teams that were already familiar with software modelling processes.

Para o desenvolvimento de aplicações Web de qualidade, o uso de uma abordagem sistemática e disciplinada é essencial, dado o crescente aumento do uso e da complexidade de tais aplicações. Nesse cenário, a Engenharia de Aplicações Web, ou simplesmente Engenharia Web, torna-se uma atividade mandatória. A Engenharia Web não é uma transcrição exata da Engenharia de Software, pois considera caracterí?sticas inerentes às aplicações Web como, por exemplo, multiplicidade do perfil de usuários e uso de multimídia. A Engenharia Web é apoiada por ferramentas, técnicas e métodos. A escolha desses elementos para um domínio de aplicação pode tornar-se uma tarefa difícil para desenvolvedores e demais interessados e é fundamental para o desenvolvimento efetivo de aplicações Web. Neste trabalho, é apresentado uma proposta de avaliação de métodos de desenvolvimento de aplicações Web. Essa proposta partiu de um conjunto de métodos selecionados por meio de trabalhos comparativos anteriores disponíveis na literatura e do levantamento de suas principais características, após estudo de caso que consistiu em modelar uma mesma aplicação (um portal Web) com os diferentes métodos selecionados. A cada característica associaram-se pesos, refletindo sua relevância a domínios especifícos, e valores refletindo seu grau de apoio a um método. Como resultado, obteve-se um arcabouço - conjunto de guidelines - para avaliar e/ou especificar métodos de desenvolvimento de aplicações Web. Esse arcabouço foi aplicado ao conjunto de métodos selecionados do estudo de caso e foram obtidas evidências da efetividade do arcabouço proposto / For the development of high quality Web applications, the use of a systematic and disciplined approach is essential, given the increasing use and complexity of such applications. In this scenario, the Web Applications Engineering, or simply Web Engineering, becomes a mandatory activity. The Web Engineering is not an accurate transcription of the Software Engineering. Besides incorporating its rules and lines of direction, the Web Engineering also considers inherent characteristics of Web applications such as user profiles multiplicity and multimedia resources. For the Web applications development process, the Web Engineering is supported by tools, techniques and methods. Among them, choosing appropriate elements for a given application domain may represent a challenge for interested developers. This work aims at supporting such choices through a proposal of an evaluation of current development methods for Web Applications. The proposed framework started from a set of well-known development methods found in the literature from which the main characteristics were identified by a case study consisted in modelling the same Web application by different methods. For each characteristic, weights have being associated, reflecting its relevance for specific domains, and values reflecting its degree of support to a method. As result, a framework is estabilished - set of guidelines - to evaluate and/or to specify methods of development of Web applications. This framework was applied to the set of selected methods of the case study and evidences have been provided effectiveness of the proposed framework

Free energy techniques provide the basis for an analysis of aspects of the liquid-vapour interface undertaken in this study. The main focus of this work is an extensive theoretical investigation into properties of the surface tension, including curvature dependence and supersaturation effects, using Monte Carlo computer simulation techniques.

While the focus of this work is on turbo equalization, there is also an examination of equalization techniques including MMSE linear and DFE equalizers and Precoding. The losses and capacity associated with the ISI channel are also examined. Iterative decoding of concatenated codes is briefly reviewed and the MAP algorithm is explained.

Darbe siekiama sudaryti metodiką, kuri leistų kurti informacines sistemas grindžiamas darbų sekų vykdymų. Norint pasiekti tikslą reikia išanalizuoti esamas kūrimo metodikas ir išsirinkti geriausias savybes, kurias panaudosiu naujos metodikos sudaryme. / In this paper work I am aiming to design a methodology that enables to develop information systems based on workflow execution. In order to achieve the objective I should to analyze the existing development methodologies and choose the best features, which I combine to create a new methodology.

This study investigates the critical success factors involved in agile systems development projects. Various systems development methodologies and project management methodologies are presented with their underlying principles, strengths and weaknesses. Thereafter the critical success factors adopted from the work of Chow and Cao (2007) are presented. A positivistic research paradigm was chosen for data collection and analysis. The survey method was chosen for data collection. A questionnaire was sent to multiple respondents in a predominantly agile work environment, which resulted in a total of 129 respondents in various business sectors. The results were analysed by implementing multiple correlation and regression statistics as well as descriptive statistics. The results show that there are in fact 16 critical success factors that have a direct impact on the success of agile systems development projects. Agile systems development methodologies have been increasing in use during the last 3 years, and most organisations are implementing some form of project management methodology. The first recommendation is based on the findings that strong customer involvement and the appropriate management of the agile process with a satisfactory amount of documentation resulted in greater process success. Therefore, organisations should encourage these critical success factors when implementing an ASDM as this has a positive effect on the project outcome. The appropriate management of the agile process with a satisfactory amount of documentation, the application of good design practices and technical knowledge to a project, and a cooperative organizational culture instead of hierarchical are three of the key critical success factors that were positively related to the success of the product. By focussing on these critical success factors, the success of the entire project can be predicted. / Thesis (MCom (Computer Science & Information Systems))--North-West University, Potchefstroom Campus, 2013.

This study investigates the critical success factors involved in agile systems development projects. Various systems development methodologies and project management methodologies are presented with their underlying principles, strengths and weaknesses. Thereafter the critical success factors adopted from the work of Chow and Cao (2007) are presented. A positivistic research paradigm was chosen for data collection and analysis. The survey method was chosen for data collection. A questionnaire was sent to multiple respondents in a predominantly agile work environment, which resulted in a total of 129 respondents in various business sectors. The results were analysed by implementing multiple correlation and regression statistics as well as descriptive statistics. The results show that there are in fact 16 critical success factors that have a direct impact on the success of agile systems development projects. Agile systems development methodologies have been increasing in use during the last 3 years, and most organisations are implementing some form of project management methodology. The first recommendation is based on the findings that strong customer involvement and the appropriate management of the agile process with a satisfactory amount of documentation resulted in greater process success. Therefore, organisations should encourage these critical success factors when implementing an ASDM as this has a positive effect on the project outcome. The appropriate management of the agile process with a satisfactory amount of documentation, the application of good design practices and technical knowledge to a project, and a cooperative organizational culture instead of hierarchical are three of the key critical success factors that were positively related to the success of the product. By focussing on these critical success factors, the success of the entire project can be predicted. / Thesis (MCom (Computer Science & Information Systems))--North-West University, Potchefstroom Campus, 2013.

Research has shown that data warehouses potentially offer great investment opportunities to business. To benefit from this, business needs to invest large sums of money. Such investments are very risky, as no guarantee of the success of these ventures can be given. Object-oriented development has proved successful for developing operational systems in industry. This study researches object-oriented techniques to discover whether these techniques could be used successfully in data warehousing. A literature study focuses on the definition of an information systems development methodology and defines the components of such methodology. A further literature study on four popular object-oriented methodologies determines the commonalities of these methodologies. In conclusion, a literature study on data warehouse methodologies is done to discover the phases and techniques used in developing data warehouses. Based on the literature, a method is proposed to build a data warehouse harnessing object-oriented phases and techniques. The proposed method is applied as an interpretive experiment, followed by an evaluation of the data warehouse implemented. / Thesis (M.Sc. (Computer Science))--North-West University, Potchefstroom Campus, 2009.