A Review Of Multi-Tenant Database And Factors That Influence Its Adoption.

A Multi-tenant database (MTD) is a way of deploying a Database as a Service (DaaS). This is gaining momentum with significant increase in the number of organizations ready to take advantage of the technology. A multi-tenant database refers to a principle where a single instance of a Database Management System (DBMS) runs on a server, serving multiple clients organizations (tenants). This is a database which provides database support to a number of separate and distinct groups of users or tenants. This concept spreads the cost of hardware, software and other services to a large number of tenants, therefore significantly reducing per tenant cost. Three different approaches of implementing multi-tenant database have been identified. These methods have been shown to be increasingly better at pooling resources and also processing administrative operations in bulk. This paper reports the requirement of multi-tenant databases, challenges of implementing MTD, database migration for elasticity in MTD and factors influencing the choice of models in MTD. An insightful discussion is presented in this paper by grouping these factors into four categories. This shows that the degree of tenancy is an influence to the approach to be adopted and the capital and operational expenditure are greatly reduced in comparison with an on-premises solutio

Comparison between modelled and measured magnetic field scans of different planar coil topologies for stress sensor applications

The investigation of planar coils of differing topologies, when combined with a magnetostrictive amorphous ribbon to form a stress-sensitive self-inductor, is an active research area for applications as stress or pressure sensors. Four topologies of planar coil (Circular, Mesh, Meander, and Square) have been constructed using copper track on 30 mm wide PCB substrate. The coils are energized to draw 0.4 A and the resulting magnetic field distribution is observed with a newly developed three-dimensional magnetic field scanner. The system is based on a variably angled Micromagnetics® STJ-020 tunneling magneto-resistance sensor with a spatial resolution of 5–10 µm and sensitivity to fields of less than 10 A/m. These experimental results are compared with the fields computed by ANSYS Maxwell® finite element modelling of the same topologies. Measured field shape and strength correspond well with the results of modelling, including direct observation of corner and edge effects. Three-dimensional analysis of the field shape produced by the square coil, isolating the components H(x) and H(z), is compared with the three-dimensional field solutions from modelling. The finite element modelling is validated and the accuracy and utility of the new system for three-dimensional scanning of general stray fields is confirmed

A Review of Agent Emotion Architectures

This paper attempts to highlight some of the research that has been conducted worldwide in the area of computational models of emotions, with a particular emphasis on agent emotions suitable for simulations and games. The intended outcome is to both review some of the more prominent research in the field, and to also ascertain the level of formal psychology that may underpin such work with a view to proposing that there is scope for an architecture built from the ground up, that arises from non-conflicting theories of emotion

Developing a framework for successful adoption and effective utilisation of ICT by SMEs in developing countries : a case study of Nigeria

In recent years there has been an increase in the adoption of Information and Communication Technology (ICT) in organisations, as the use of ICT causes some form of revolution in business practices. All over the world, ICT has greatly transformed the manner in which companies conduct business. However, there is considerable evidence to show that Small and Medium Sized Enterprises (SMEs) in developing countries, particularly those in Sub-Saharan Africa (SSA), are yet to reap the full benefits offered by ICT as compared to their counterparts in the developed countries. Although the contribution of SMEs’ is of notable importance to many countries’ economy, yet those in developing countries lag far behind. For SMEs to survive and remain competitive in the current highly competitive business environment there is a need to adopt and use ICT effectively, in order to attain some level of competitive advantage. This research investigates factors affecting the adoption and effective utilisation of ICT, with particular emphasis on SMEs in Nigeria. It is presumed that SMEs’ adoption of ICT in Nigeria will provide opportunities to accelerate the country’s socio-economic growth as it will offer Nigeria the chance to ‘leapfrog’ some stages of development. The methodology adopted in undertaking this study is the qualitative research approach although a survey was used at the initial stage, to provide an exploratory snapshot of the SMEs in context. This research has empirically identified key factors motivating ICT adoption in Nigerian SMEs, and benefits resulting from the use of ICT in their organisational performance. Factors affecting the adoption and effective utilisation of ICT in Nigerian SMEs were also identified. Following this, strategies were proposed which led to the development of a framework that will assist to increase the adoption and effective use of ICT amongst SMEs in Nigeria and also, aid the further deployment of more sophisticated ICT solutions by these SMEs. The framework was validated via a survey and analysed with the aid of SPSS software. The findings obtained from the validation procedure indicated that the framework is valuable and suitable for use in practice since the research shows that the majority of respondents accepted the research findings and recommendations for success. This research offers recommendations that will assist the Nigerian government, stakeholders such as ISPs, as well as owners/managers of SMEs, in resolving the problems confronting SMEs in Nigeria.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

An investigation into the relevance of flexibility- and interoperability requirements for implementation processes for workflow-management-applications

Flexibility and Interoperability have become important characteristics for organisations and their business processes. The need to control flexible business processes within an organisation’s boundaries and between organisations imposes major requirements on a company’s process control capabilities. Workflow Management Systems (WFMS) try to fulfil these requirements by offering respective product features. Evidence suggests that the achievement of flexible business processes and an inter-organisational process control is also influenced by implementation processes for Workflow Management Applications (WFMA). [A WFMA comprises the WFMS and "all WFMS specific data with regard to one or more business processes" [VER01]]. The impact of a WFMA implementation methodology on the fulfilment of these requirements is the research scope of the project. The thesis provides knowledge in the following areas: 1. Review of the relationship between workflow management and the claim for process flexibility respectively -interoperability. 2. Definition of a research-/evaluation framework for workflow projects. This framework is composed of all relevant research variables that have been identified for the thesis. 3. Empirical survey of relevant workflow-project objectives and their priority in the context of process flexibility and –interoperability. 4. Empirical survey of the objectives’ achievement. 5. Empirical survey of methodologies / activities that have been applied within workflow projects. 6. Derivation of the project methodologies’ effectiveness in terms of the impact that applied activities had on project objectives. 7. Evaluation of existing workflow life-cycle models in accordance with the research framework. 8. Identification of basic improvements for workflow implementation processes with respect to the achievement of flexible and interoperable business processes. The first part of the thesis argues the relevance of the subject. Afterwards research variables that constitute the evaluation framework for WFMA implementation processes are stepwise identified and defined. An empirical study then proves the variables’ effectiveness for the achievement of process flexibility and –interoperability within the WFMA implementation process. After this the framework is applied to evaluate chosen WFMA implementation methodologies. Identified weaknesses and effective methodological aspects are utilised to develop generic methodological improvements. These improvements are later validated by means of a case study and interviews with workflow experts.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

An investigation into the relevance of flexibility- and interoperability requirements for implementation processes for workflow-management-applications

Flexibility and Interoperability have become important characteristics for organisations and their business processes. The need to control flexible business processes within an organisation’s boundaries and between organisations imposes major requirements on a company’s process control capabilities. Workflow Management Systems (WFMS) try to fulfil these requirements by offering respective product features. Evidence suggests that the achievement of flexible business processes and an inter-organisational process control is also influenced by implementation processes for Workflow Management Applications (WFMA). [A WFMA comprises the WFMS and "all WFMS specific data with regard to one or more business processes" [VER01]]. The impact of a WFMA implementation methodology on the fulfilment of these requirements is the research scope of the project. The thesis provides knowledge in the following areas: 1. Review of the relationship between workflow management and the claim for process flexibility respectively -interoperability. 2. Definition of a research-/evaluation framework for workflow projects. This framework is composed of all relevant research variables that have been identified for the thesis. 3. Empirical survey of relevant workflow-project objectives and their priority in the context of process flexibility and –interoperability. 4. Empirical survey of the objectives’ achievement. 5. Empirical survey of methodologies / activities that have been applied within workflow projects. 6. Derivation of the project methodologies’ effectiveness in terms of the impact that applied activities had on project objectives. 7. Evaluation of existing workflow life-cycle models in accordance with the research framework. 8. Identification of basic improvements for workflow implementation processes with respect to the achievement of flexible and interoperable business processes. The first part of the thesis argues the relevance of the subject. Afterwards research variables that constitute the evaluation framework for WFMA implementation processes are stepwise identified and defined. An empirical study then proves the variables’ effectiveness for the achievement of process flexibility and –interoperability within the WFMA implementation process. After this the framework is applied to evaluate chosen WFMA implementation methodologies. Identified weaknesses and effective methodological aspects are utilised to develop generic methodological improvements. These improvements are later validated by means of a case study and interviews with workflow experts.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

E-AI : an emotion architecture for agents in games & virtual worlds

Characters in games and virtual worlds continue to gain improvements in both their visual appearance and more human-like behaviours with each successive generation of hardware. One area that seemingly would need to be addressed if this evolution in human-like characters is to continue is in the area of characters with emotions. To begin addressing this, the thesis focuses on answering the question “Can an emotional architecture be developed for characters in games and virtual worlds, that is built upon a foundation of formal psychology? Therefore a primary goal of the research was to both review and consolidate a range of background material based on the psychology of emotions to provide a cohesive foundation on which to base any subsequent work. Once this review was completed, a range of supplemental material was investigated including computational models of emotions, current implementations of emotions in games and virtual worlds, machine learning techniques suitable for implementing aspects of emotions in characters in virtual world, believability and the role of emotions, and finally a discussion of interactive characters in the form of chat bots and non-player characters. With these reviews completed, a synthesis of the research resulted in the defining of an emotion architecture for use with pre-existing agent behaviour systems, and a range of evaluation techniques applicable to agents with emotions. To support validation of the proposed architecture three case studies were conducted that involved applying the architecture to three very different software platforms featuring agents. The first was applying the architecture to combat bots in Quake 3, the second to a chat bot in the virtual world Second Life, and the third was to a web chat bot used for e-commerce, specifically dealing with question and answers about the companies services. The three case studies were supported with several small pilot evaluations that were intended to look at different aspects of the implemented architecture including; (1) Whether or not users noticed the emotional enhancements. Which in the two small pilot studies conducted, highlighted that the addition of emotions to characters seemed to affect the user experience when the encounter was more interactive such as in the Second Life implementation. Where the interaction occurred in a combat situation with enemies with short life spans, the user experience seemed to be greatly reduced. (2) An evaluation was conducted on how the combat effectiveness of combat bots was affected by the addition of emotions, and in this pilot study it was found that the combat effectiveness was not quite statistically reduced, even when the bots were running away when afraid, or attacking when angry even if close to death. In summary, an architecture grounded in formal psychology is presented that is suitable for interactive characters in games and virtual worlds, but not perhaps ideal for applications where user interaction is brief such as in fast paced combat situations. This architecture has been partially validated through three case studies and includes suggestions for further work especially in the mapping of secondary emotions, the emotional significance of conversations, and the need to conduct further evaluations based on the pilot studies.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Towards a model of ICT adoption for the ICT Cluster

This thesis is concerned with the exploration of a framework for ICT adoption by ICT microsized companies in the West Midlands. The thesis evolved out of the author's sense of dissatisfaction with several cardinal aspects of traditional approaches to facilitating adoption of the latest technologies in small companies to enhance business performance. Four main weaknesses were identified: first, there is often a lack of a theoretical foundation for the approach taken with regard to interventions. Second, there is ample evidence to suggest that the environment of small companies is complex and volatile and fundamental to the economy and yet hitherto success of the support in this area is patchy. Third, the role of those working to support small companies is largely unsupported in terms of their understanding of the problems. Fourth, small companies themselves are often uninformed of the issues and unaware that simple changes will aid their approach to ICT adoption. Inspiration from three sources helped the author to develop the work behind this thesis and attempt to remedy weaknesses: first, the work of many researchers in ICT Evaluation methods and frameworks provided insights into the value placed on ICT within organisations and the subsequent impact of the perception of value. Second, developments in the study of SMEs provided new insights into the unique environment that exists within small companies and the issues that these organisations face on a daily basis. Third, research around the new field of EDI and eBusness adoption provided the basis for the exploration of frameworks and models that were applicable to the SME environment and could be developed to work with any technology adoption. This thesis is therefore the exploration of a new model for micro-companies, supported by a thorough grounding in these three areas, which was achieved by taking an exploratory research approach. The model will indicate to a small company the weaknesses in their environment regarding ICT adoption and what they need to do to increase the success rate of any proposed ICT adoption. The framework has been developed to incorporate the issues regarding the personal factors of the owner-manager, the firm, organisational readiness, external pressures, strategy and perceived value. The author describes the methodology behind the development of the framework and makes recommendations for improved ICT adoption initiatives. Application of the general methodology through exploratory research has resulted in new opportunities to embed the ethos and culture surrounding the issues in the framework into new projects developed as a result of Government intervention. The thesis proposes three main themes: first that an understanding of the issues inherent in small companies is necessary in order to work effectively in supporting them to make ICT adoption more successful in the future. Second, that a greater knowledge of these issues and the impact that adoption of technology has in small companies can assist those involved in intervention projects. Third, that by drawing together existing models this new framework can guide these companies in their own ability to adopt successfully and raise awareness regarding the need to address these factors. Taken together, these areas represent a new approach to ICT adoption. The thesis demonstrates originality in four key areas: 1. It extends and develops an understanding of the micro-company environment and the issues inherent when faced with the adoption of new technology. 2. It introduces a new model for use by micro-companies constructed from acknowledged academically grounded models, to develop and highlight their ability to adopt new technology successfully. 3. The exploration of the issues within the ICT sector gives unique insight to a vertical business sector. 4. Investigation of the sector within a UK sub-region gives new insights for that region giving an opportunity for intervention to be augmented by the findings.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Towards a model of ICT adoption for the ICT Cluster

This thesis is concerned with the exploration of a framework for ICT adoption by ICT microsized companies in the West Midlands. The thesis evolved out of the author's sense of dissatisfaction with several cardinal aspects of traditional approaches to facilitating adoption of the latest technologies in small companies to enhance business performance. Four main weaknesses were identified: first, there is often a lack of a theoretical foundation for the approach taken with regard to interventions. Second, there is ample evidence to suggest that the environment of small companies is complex and volatile and fundamental to the economy and yet hitherto success of the support in this area is patchy. Third, the role of those working to support small companies is largely unsupported in terms of their understanding of the problems. Fourth, small companies themselves are often uninformed of the issues and unaware that simple changes will aid their approach to ICT adoption. Inspiration from three sources helped the author to develop the work behind this thesis and attempt to remedy weaknesses: first, the work of many researchers in ICT Evaluation methods and frameworks provided insights into the value placed on ICT within organisations and the subsequent impact of the perception of value. Second, developments in the study of SMEs provided new insights into the unique environment that exists within small companies and the issues that these organisations face on a daily basis. Third, research around the new field of EDI and eBusness adoption provided the basis for the exploration of frameworks and models that were applicable to the SME environment and could be developed to work with any technology adoption. This thesis is therefore the exploration of a new model for micro-companies, supported by a thorough grounding in these three areas, which was achieved by taking an exploratory research approach. The model will indicate to a small company the weaknesses in their environment regarding ICT adoption and what they need to do to increase the success rate of any proposed ICT adoption. The framework has been developed to incorporate the issues regarding the personal factors of the owner-manager, the firm, organisational readiness, external pressures, strategy and perceived value. The author describes the methodology behind the development of the framework and makes recommendations for improved ICT adoption initiatives. Application of the general methodology through exploratory research has resulted in new opportunities to embed the ethos and culture surrounding the issues in the framework into new projects developed as a result of Government intervention. The thesis proposes three main themes: first that an understanding of the issues inherent in small companies is necessary in order to work effectively in supporting them to make ICT adoption more successful in the future. Second, that a greater knowledge of these issues and the impact that adoption of technology has in small companies can assist those involved in intervention projects. Third, that by drawing together existing models this new framework can guide these companies in their own ability to adopt successfully and raise awareness regarding the need to address these factors. Taken together, these areas represent a new approach to ICT adoption. The thesis demonstrates originality in four key areas: 1. It extends and develops an understanding of the micro-company environment and the issues inherent when faced with the adoption of new technology. 2. It introduces a new model for use by micro-companies constructed from acknowledged academically grounded models, to develop and highlight their ability to adopt new technology successfully. 3. The exploration of the issues within the ICT sector gives unique insight to a vertical business sector. 4. Investigation of the sector within a UK sub-region gives new insights for that region giving an opportunity for intervention to be augmented by the findings.EThOS - Electronic Theses Online ServiceGBUnited Kingdo