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.

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.

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.

Integration is one of the driving themes in database and applied computing research. Starting with the development of Federated Information Systems and passing over to Enterprise Application Integration, the integration of distributed systems receives a lot of attention with the development of Web services these days. Integration on an architecture independent level can be cast to the integration of autonomous object oriented systems which requires the integration of object structure and object behaviour. Past research has mainly addressed the structural aspects meaning the integration of class attributes and relations. This thesis is addressing the integration of object behaviour and proposes a structured, model-driven approach for the integration of business processes specifying software application behaviour. It consists of the identification of correspondences between business processes on different levels of abstraction and associates the correspondences with integration patterns that lead to a specific technical integration. One advantage of the approach is that correspondences and patterns are defined separately, which enhances the re-usability of patterns in different integration scenarios. Integration scenarios can be distinguished between horizontal and vertical integration, and within or across enterprise borders. Within an enterprise, horizontal integration consists of integrating systems on the same level of abstraction and vertical integration consists of integrating systems on different levels of abstractions, whereas across enterprise borders, horizontal integration consists of determining the most appropriate systems, from among a set of functionally equivalent ones, and vertical integration consists of defining an appropriate combination of systems to create a new one. So far, there exist no approach that attempts to support all integration scenarios within a framework. This thesis proposes an integration approach that is able to support all integration scenarios mentioned before. The approach is built on a meta-meta layer architecture and provides generic methods and techniques for the logical integration of object behaviour based on a domain independent framework. The thesis proposes two alternative outcomes of an integration. First one creates a new global behaviour that integrates local behaviour and can be supported by a service oriented architecture. Second alternative outcome are synchronisation points between business process, so-called inter-process dependencies, that can be supported by an event-driven architecture. The advantages and disadvantages of both are discussed in detail.

<p dir="ltr">The use of connected health technology is becoming increasingly significant in the field of healthcare. Artificial Intelligence- augmented workflows connected to treatment guidelines promise more inclusive care delivery. The AI/ML-based connected health informatics plays an integral role in every stage of medical product development, from initial discovery to providing guidance to healthcare providers, and finally to delivering patient care. The exponential growth of meta data and the rapid advancement of connected health technologies provide greater opportunities for novel healthcare solutions, delivery mechanisms, and clinical trial designs.</p><p dir="ltr">However, it poses complexity of the AI/ML-specific challenges besides all the challenges SaMD products face. The regulations for AI/ML-based connected solutions have yet to mature. The AI/ML SaMD development process requires additional considerations such as data quality and management, continuous deployment, and validation.</p><p><br></p><p dir="ltr">This study delves into the integration of Machine Learning (ML) with medical software devices and how the current lifecycle models fit the needs of the AI industry. AI/ML-based SaMD development process artifacts are identified through the theory and AI/ML SaMD regulations and standards requirements. Moreover, this study analyzes collected data from interviews, surveys, and an experimental case study to identify success factors in building quality and agility for AI/ML-based SaMD development projects.</p><p dir="ltr">Incorporating of Artificial Intelligence (AI) in healthcare requires continuous deployment and validation processes, which may not be in line with the current workflow, capability, or authority of regulators. This research also highlights that model governance and technology access can be key challenges in implementing AI/ML development process artifacts, especially when integrated into connected health solutions.</p><p dir="ltr">This work sets the foundation for future research to reduce bottlenecks in the machine-learning process. The focus should be on aiding model governance to streamline development and ensure machine reliability. A suitable software toolchain is necessary for exploratory data analysis, data integration, documentation, model governance, monitoring, version control, and integration with other software and services within a connected health solution. Additionally, conducting more focused research on security and privacy in the context of connected health would be valuable.</p>

The purpose of this study was to investigate the relationship between systems development methodologies (SDMs) and the success of Information Technology (IT) projects. The study also seeks to find other critical success factors (CSFs) that influence IT projects success. What initiated this study, with reference to the literature review, is the apparent general view that IT project deliveries are still late, over budget, and unpredictable (Chow & Cao, 2008:961; The Standish Group, 2004). To some extent, the entire project fails before delivering an application. Hence this causes the need to investigate the employment of SDMs and their belief that SDMs improve quality in the development of IT projects and permit more flexible deployment to IT projects (Idea Group Publishing, 2006:13; Dyba et al., 2005:447; Mihailescu & Mihailescu, 2009:1). However, SDMs are still less popularly used (Siau & Tan, 2005:3132; Masrek I., 2008:137). The study provides insight into the relationship between SDMs and the IT projects. A survey using a questionnaire was carried out to obtain the data. The study employed a positivist paradigm and used a quantitative approach. A total of 132 questionnaires were returned from systems developers, IT project managers and team leaders from system development companies. It was found that there is a relationship between systems development methodologies (SDMs) and IT project success. Despite recognizing the benefits and advantages of using SDMs, some respondents disclosed that they were not inclined to employ SDMs and the popular reason was that their profile of development projects didn‟t require the use of SDMs. Multiple regression analysis was used to determine the relationship. Consequently, the top ten CSFs were observed and it was found that “identifying potential risk” and “opportunity” were the most favourable factors. The study could have obtained richer and more insightful information regarding SDMs and critical success factors if more data had been collected. Future work should seek to determine the risks, challenges and problems associated with the adoption of SDMs. / MSc (Computer Science), North-West University, Potchefstroom Campus, 2013

The purpose of this study was to investigate the relationship between systems development methodologies (SDMs) and the success of Information Technology (IT) projects. The study also seeks to find other critical success factors (CSFs) that influence IT projects success. What initiated this study, with reference to the literature review, is the apparent general view that IT project deliveries are still late, over budget, and unpredictable (Chow & Cao, 2008:961; The Standish Group, 2004). To some extent, the entire project fails before delivering an application. Hence this causes the need to investigate the employment of SDMs and their belief that SDMs improve quality in the development of IT projects and permit more flexible deployment to IT projects (Idea Group Publishing, 2006:13; Dyba et al., 2005:447; Mihailescu & Mihailescu, 2009:1). However, SDMs are still less popularly used (Siau & Tan, 2005:3132; Masrek I., 2008:137). The study provides insight into the relationship between SDMs and the IT projects. A survey using a questionnaire was carried out to obtain the data. The study employed a positivist paradigm and used a quantitative approach. A total of 132 questionnaires were returned from systems developers, IT project managers and team leaders from system development companies. It was found that there is a relationship between systems development methodologies (SDMs) and IT project success. Despite recognizing the benefits and advantages of using SDMs, some respondents disclosed that they were not inclined to employ SDMs and the popular reason was that their profile of development projects didn‟t require the use of SDMs. Multiple regression analysis was used to determine the relationship. Consequently, the top ten CSFs were observed and it was found that “identifying potential risk” and “opportunity” were the most favourable factors. The study could have obtained richer and more insightful information regarding SDMs and critical success factors if more data had been collected. Future work should seek to determine the risks, challenges and problems associated with the adoption of SDMs. / MSc (Computer Science), North-West University, Potchefstroom Campus, 2013

At a theoretical level the research identifies a conceptual framework for the design of fruitful case discussions in an online environment and at a practical level, the conceptual framework has been used to implement and evaluate several versions of a case-based online course.

The main focus of this study is to determine if systems development methodologies are being utilised in the development of electronic learning systems in South Africa and if these methodologies are being applied effectively. Essentially this study can be viewed as exploratory research, utilising a conceptual research model to investigate the relationships between the constructs and measurements. Electronic learning, or e-learning, is being employed to educate millions of learners, students and employees around the world and it is a critical component of modern educational systems. E-learning systems, or learning management systems, as it is known in the field, sit at the heart of these educational systems and are used to systematically deliver on-line content and facilitate the learning experience around that content. There is still much confusion and misconceptions surrounding e-learning and learning management systems abound. This study will try and clarify some of these misconceptions. In e-learning systems, the effective use of information systems is especially relevant as it is used to educate the minds of the future. To ensure that e-learning systems of outstanding quality are being developed, it is therefore crucial that systems development methodologies are being used as they can have a significant impact on the development process. There is a dearth of empirical research available on the use and effectiveness of systems development methodologies in South Africa. This study aims, amongst other things to make a contribution to the availability of empirical results. By empirically evaluating the conceptual research model, utilising a survey as the main research method and statistically analysing the dataset, meaningful results were obtained. This study gave some insights into how learning management system procurement and development is being done in South Africa and revealed that the use of open-source systems currently exceeds the use of proprietary systems. The results of the research showed that systems development methodologies (e.g. Object-Oriented Analysis and Rapid Application Development) are being used effectively in the development of e-learning systems. Strong relationships exist between many of the systems development methodology factors identified (e.g. performance expectancy and the perceived support of the methodology) and the quality and productivity of the development process. This in turn has a strong influence on the impact systems development methodologies have on the quality of learning management systems. / MCom (Computer Science & Information Systems), North-West University, Potchefstroom Campus, 2014

The main focus of this study is to determine if systems development methodologies are being utilised in the development of electronic learning systems in South Africa and if these methodologies are being applied effectively. Essentially this study can be viewed as exploratory research, utilising a conceptual research model to investigate the relationships between the constructs and measurements. Electronic learning, or e-learning, is being employed to educate millions of learners, students and employees around the world and it is a critical component of modern educational systems. E-learning systems, or learning management systems, as it is known in the field, sit at the heart of these educational systems and are used to systematically deliver on-line content and facilitate the learning experience around that content. There is still much confusion and misconceptions surrounding e-learning and learning management systems abound. This study will try and clarify some of these misconceptions. In e-learning systems, the effective use of information systems is especially relevant as it is used to educate the minds of the future. To ensure that e-learning systems of outstanding quality are being developed, it is therefore crucial that systems development methodologies are being used as they can have a significant impact on the development process. There is a dearth of empirical research available on the use and effectiveness of systems development methodologies in South Africa. This study aims, amongst other things to make a contribution to the availability of empirical results. By empirically evaluating the conceptual research model, utilising a survey as the main research method and statistically analysing the dataset, meaningful results were obtained. This study gave some insights into how learning management system procurement and development is being done in South Africa and revealed that the use of open-source systems currently exceeds the use of proprietary systems. The results of the research showed that systems development methodologies (e.g. Object-Oriented Analysis and Rapid Application Development) are being used effectively in the development of e-learning systems. Strong relationships exist between many of the systems development methodology factors identified (e.g. performance expectancy and the perceived support of the methodology) and the quality and productivity of the development process. This in turn has a strong influence on the impact systems development methodologies have on the quality of learning management systems. / MCom (Computer Science & Information Systems), North-West University, Potchefstroom Campus, 2014