Computational approaches to the visual validation of 3D virtual environments

Virtual environments can provide, through digital games and online social interfaces, extremely exciting forms of interactive entertainment. Because of their capability in displaying and manipulating information in natural and intuitive ways, such environments have found extensive applications in decision support, education and training in the health and science domains amongst others. Currently, the burden of validating both the interactive functionality and visual consistency of a virtual environment content is entirely carried out by developers and play-testers. While considerable research has been conducted in assisting the design of virtual world content and mechanics, to date, only limited contributions have been made regarding the automatic testing of the underpinning graphics software and hardware. The aim of this thesis is to determine whether the correctness of the images generated by a virtual environment can be quantitatively defined, and automatically measured, in order to facilitate the validation of the content. In an attempt to provide an environment-independent definition of visual consistency, a number of classification approaches were developed. First, a novel model-based object description was proposed in order to enable reasoning about the color and geometry change of virtual entities during a play-session. From such an analysis, two view-based connectionist approaches were developed to map from geometry and color spaces to a single, environment-independent, geometric transformation space; we used such a mapping to predict the correct visualization of the scene. Finally, an appearance-based aliasing detector was developed to show how incorrectness too, can be quantified for debugging purposes. Since computer games heavily rely on the use of highly complex and interactive virtual worlds, they provide an excellent test bed against which to develop, calibrate and validate our techniques. Experiments were conducted on a game engine and other virtual worlds prototypes to determine the applicability and effectiveness of our algorithms. The results show that quantifying visual correctness in virtual scenes is a feasible enterprise, and that effective automatic bug detection can be performed through the techniques we have developed. We expect these techniques to find application in large 3D games and virtual world studios that require a scalable solution to testing their virtual world software and digital content.

Applying Enterprise Architecture to Business Networks

Globalization, financial deregulation, economic turmoil, and technology breakthroughs are profoundly exposing organizations to business networks. Engaging these networks requires explicit planning from the strategic level down to the operational level of an organization, which significantly affects organizational artefacts such as business services, processes, and resources. Although enterprise architecture (EA) aligns business and IT aspects of organizational systems, previous applications of EA have not comprehensively addressed a methodological framework for planning. In the context of business networks, this study seeks to explore the application of EA for business network planning where it builds upon relevant and well-established prescriptive and descriptive aspects of EA. Prescriptive aspects include integrated models of services, business processes, and resources among other organizational artefacts, at both business and IT levels. Descriptive aspects include ontological classifications of business functionality, which allow EA models to be aligned semantically to organizational artefacts and, ultimately higher-level business strategy. A prominent approach for capturing descriptive aspects of EA is business capability modelling. In order to explore and develop the illustrative extensions of EA through capability modelling, a list of requirements (capability dimensions) for business network planning will be identified and validated through a revelatory case study encompassing different business network manifestations, or situations. These include virtual organization, liquid workforce, business network orchestration, and headquarters-subsidiary. The use of artefacts, conventionally, modelled through EA will be considered in these network situations. Two general considerations for EA extensions are explored for the identified requirements at the level of the network: extension of artefacts through the network and alignment of network level artefacts with individual organization artefacts. The list of requirements provides the basis for a constructivist extension of EA in the following ways. Firstly, for descriptive aspects, it offers constructivist insights to guide extensions for particular EA techniques and concepts. Secondly, for prescriptive aspects it defines a set of capability dimensions, which improve the analysis and assessment of organization capabilities for business network situations.

International virtual networking capabilities and firm performance: A study of international entrepreneurial Australian SMEs

The Internet is a critical resource for a new generation of small and medium sized enterprise. Specifically, the Internet is important for small entrepreneurial firms in pursuing international opportunities through increased digital integration. As such, the Internet has been identified as a key enabler of international entrepreneurship (Reuber & Fischer, 2011). By facilitating international business for many entrepreneurial SMEs, the Internet has the ability to increase the quality and speed of communications, lower transaction costs, and facilitate the development of international networks. Although the Internet has been found to play a pivotal role in the creation of international relationships and is a mechanism for the creation of international growth opportunities in SMEs (Mathews & Healy, 2008), the role of the international entrepreneurial decision-maker in the development of international virtual networks for leveraging opportunities in internationalisation remains unclear. The findings of this research indicate that developing an ‘international virtual network capability’ forms an important part of the firm’s resource and more specifically dynamic capability base, which is just one component of a firm’s resource bundle that builds towards successful internationalisation via an Internet platform.

Enterprise internships: modern fashion or real need?

The objectives of this work are twofold. First, it aims to reflect on student internship placements as a tool for developing the engineering curriculum. Secondly, we present a webbased software for the efficient management of enterprise internships. This tool is scalable, allowing the management of an increased number of students while minimizing the requirement for managing time

Communities of enterprise: SMEs, ICT and regional development

Many regional economies have pursued a strategy of stimulating the development of regional clusters. Such clusters typically include small and medium enterprises (SMEs) as a core component of those economies. Effective cluster development in that context depends on SMEs sharing knowledge and generating innovation. ICT networks can be an important resource for this sharing and innovation. This paper proposes the concept of ‘Communities of Enterprise’ to conceptualise the relationships and communication patterns used in cluster development. This concept builds on theoretical understandings of information systems, clustering and regional development. The value creation potential of Communities of Enterprise, supported by ICTs is substantial, but only when the socioeconomic elements of regional clusters are understood. The Community of Enterprise approach addresses the fact that without an industry focus it can be difficult to engage and link SMEs from different industries, although this is where the greatest potential for value creation in regional clusters is to be found. This paper concludes by considering the relevance of Communities of Enterprise for understanding and researching eCluster development in the Australian regional context.

Disrupting girls in virtual communities of practice: discursive performativity as agency

In line with the work of feminists ‘post-linguists’ (Threadgold, 1997; Poynton, 1989; Lee, 1994) who seek to produce readings of texts which indicate the ways individuals are positioned to take up positions within discourses and thus come to constitute themselves as subjects of those discourses, this paper reports on how adolescent girls’ hypermedia design works to alter the conceptual repertoire of the individual and in doing so alters the individual’s subjectivity. By examining girls hypermedia design that challenges/resists male domination, I discuss their acts of uploading and hypermedia design in terms of Butler’s theorization of discursive performativity. I believe the adolescent girls employ a form of “linguistic agency” or “discursive agency” (Butler, 1997) that allows them to make use of a wide range of discursive practices that are nonlinguistic or not entirely linguistic. Because the girls were involved in a set of relationships over time, both inside and outside of school in both virtual and real time, within their communities of practice (Lave & Wenger, 1991), they engage with particular areas of curricular knowledge—differently than boys—by showcasing their re-representations online. Consequently, this presents the possibility they may possess a joint enterprise and similar sense of identity. This paper puts forth the idea that within virtual communities of practice, new contexts emerge when disrupting girls/women can work in transgressive modes.

Communities of enterprise : developing regional SMEs in the knowledge economy

Purpose – This paper proposes the concepts of Communities of Enterprise (CoEs) and Virtual Communities of Enterprise (VCoEs) to describe business networking patterns in regional areas where there is no central organisational or industry focus and small and medium enterprises dominate the economy. Design/methodology/approach – Based on analysis of the literature this paper builds on theoretical understandings of knowledge management, clustering and regional development.
Findings – The concept of CoEs is most appropriate for regional areas characterised by many small enterprises in diverse industries. CoEs enhance development of regional clusters by contributing to their intellectual capital, innovation culture, value networks and social capital. The incorporation of ICT creates VCoEs which provide added potential by enabling regions to expand their learning potential through innovation.
Research limitations/implications – This paper provides a conceptual foundation for empirical research into regional network or cluster development using ICT.
Practical implications – Virtual Communities of Enterprise value creation potential is substantial but only when the socioeconomic elements of regional clusters are understood. The VCoE approach addresses the fact that without an industry focus it can be difficult to engage and link SMEs from different industries, although this is where the greatest potential
for value creation in regional clusters is to be found.
Originality/value – The Virtual Communities of Enterprise (VCoEs) concept specifically addresses the unique requirements of SMEs in regions. It has the potential to provide value for regions in a way few ICT based regional development initiatives have been able to achieve.

Virtual thievery : an insight into the criminal mind of virtual property thieves

Virtual worlds have become highly popular in recent years with reports of over a billion people accessing these worlds and the virtual goods market growing to near $50 US billion dollars. An undesirable outcome to this popularity and market value is thriving criminal activity in these worlds.  The most profitable transgression at the moment in virtual worlds is named Virtual Property Theft.  The aim of this study is to gain insight using an online survey, as to how thieves in these synthetic worlds conduct their criminal activities.  This survey asked questions on: thief profiling, how theft was conducted, times of criminal activity, which items are stolen and distributed, victim targeting and criminal profiteering.  This survey is the first to report an insight into the criminal mind of virtual thieves.  The results of this study will provide a pathway for designing an effective anti-theft mechanism capable of abolishing this criminal enterprise.

Library in virtual reality: An innovative way for accessing, disseminating, and sharing information

This paper focuses on Virtual Reality (VR) as a very powerful technology that can be applied to the libraries, aiming at contributing to the activities of accessing, disseminating, and sharing information. The paper presents the VR concept and describes some libraries in virtual reality under utilization in different countries. In the final considerations, it is pointed out the use of virtual reality to develop libraries as collaborative virtual environments.

Mediação do processo ensino-aprendizagem com o jogo de empresas mercado virtual: uma pesquisa de opinião

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Virtual Infrastructures as a Service enabling Converged Optical Networks and Data Centres

Abstract Cloud computing service emerged as an essential component of the Enterprise {IT} infrastructure. Migration towards a full range and large-scale convergence of Cloud and network services has become the current trend for addressing requirements of the Cloud environment. Our approach takes the infrastructure as a service paradigm to build converged virtual infrastructures, which allow offering tailored performance and enable multi-tenancy over a common physical infrastructure. Thanks to virtualization, new exploitation activities of the physical infrastructures may arise for both transport network and Data Centres services. This approach makes network and Data Centres’ resources dedicated to Cloud Computing to converge on the same flexible and scalable level. The work presented here is based on the automation of the virtual infrastructure provisioning service. On top of the virtual infrastructures, a coordinated operation and control of the different resources is performed with the objective of automatically tailoring connectivity services to the Cloud service dynamics. Furthermore, in order to support elasticity of the Cloud services through the optical network, dynamic re-planning features have been provided to the virtual infrastructure service, which allows scaling up or down existing virtual infrastructures to optimize resource utilisation and dynamically adapt to users’ demands. Thus, the dynamic re-planning of the service becomes key component for the coordination of Cloud and optical network resource in an optimal way in terms of resource utilisation. The presented work is complemented with a use case of the virtual infrastructure service being adopted in a distributed Enterprise Information System, that scales up and down as a function of the application requests.

Developing an enterprise simulator to support electronic supply chain for B2B electronic process

The application of any e-Solution promises significant returns. In particular, using internet technologies both within enterprises and across the supply (value) chain provides real opportunity, not only for operational improvement but also for innovative strategic positioning. However, significant questions obscure potential investment; how any value will actually be created and, importantly, how this value will be shared across the value chain is not clear. This paper will describe a programme of research that is developing an enterprise simulator that will provide a more fundamental understanding of the impact of e-Solutions across operational supply chains, in terms of both standard operational and financial measures of performance. An efficient supply chain reduces total costs of operations by sharing accurate real-time information and coordinating inter-organizational business processes. This form of electronic link between organizations is known as business-to-business (B2B) e-Business. The financial measures go beyond simple cost calculations to real bottom-line performance by modelling the financial transactions that business processes generate. The paper will show how this enterprise simulator allows for a complete supply chain to be modelled in this way across four key applications: control system design, virtual enterprises, pan-supply-chain performance metrics and supporting e-Supply-chain design methodology.

A conceptual framework for enterprise management

This paper reports on the theoretical foundations and the practical reasons for the increasing popularity of the enterprise management perspective. Theoretical foundations are given that discuss vertically integrated, virtual and extended enterprises in terms of endogenous and exogenous factors, and the tensions that these create. An exploratory study in the German automotive industry using inductive grounded theory was conducted, involving data collection via 28 semi-structured interviews with 16 companies and data validation via a questionnaire survey receiving 110 responses from 52 companies. The research delivers a conceptual framework to show how enterprise structures emerge, depending on the prevailing type of core competencies that they use. Furthermore, it proposes contingency-planning recommendations to facilitate managing the change from one structure to another as the demands placed upon the enterprise change.

Virtual manufacturing:a study of some important issues relating to the transformation of traditional manufacturing organisations

This thesis starts with a literature review, outlining the major issues identified in the literature concerning virtual manufacturing enterprise (VME) transformation. Then it details the research methodology used – a systematic approach for empirical research. next, based on the conceptual framework proposed, this thesis builds three modules to form a reference model, with the purpose of clarifying the important issues relevant to transforming a traditional manufacturing company into a VME. The first module proposes a mechanism of VME transformation – operating along the VME metabolism. The second module builds a management function within a VME to ensure a proper operation of the mechanism. This function helps identify six areas as closely related to VME transformation: lean manufacturing; competency protection; internal operation performance measurement; alliance performance measurement; knowledge management; alliance decision making. The third module continues and proposes an alliance performance measurement system which includes 14 categories of performance indicators. An analysis template for alliance decision making is also proposed and integrated into the first module. To validate these three modules, 7 manufacturing organisations (5 in China and 2 in the UK) were investigated, and these field case studies are analysed in this thesis. The evidence found in these organisations, together with the evidence collected from the literature, including both researcher views and literature case studies, provide support for triangulation evidence. In addition, this thesis identifies the strength and weakness patterns of the manufacturing companies within the theoretical niche of this research, and clarifies the relationships among some major research areas from the perspective of virtual manufacturing. Finally, the research findings are summarised, as well as their theoretical and practical implications. Research limitations and recommendations for future work conclude this thesis.