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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

BPAOntoSOA : A Semantically Enriched Framework for Deriving SOA Candidate Software Services from Riva-based Business Process Architecture

Yousef, Rana Mohammad January 2010 (has links)
Service-Oriented Architecture (SOA) is becoming the mainstream for providing efficient and agile business solutions that can keep up with changes demanded by the business world. The task of identifying candidate services is one of the main activities in developing software service-oriented models. The current service identification approaches exhibit some limitations, where they are either too complex to be adopted, too simple to satisfy all SOA principles, or are theoretical approaches that are far from automation. On the other side, ontologies have been introduced in a number of phases in the SOA development lifecycle, mainly in the design and implementation phases. This research is concerned with introducing an ontology-based framework to semantically generate services from business process architectures (BPA) and using a simple service identification approach that is based on the BP A for an organisation. In this research, a novel architectural framework has been introduced that is generic, extensible, BPA-driven, ontology-based and domain independent, but uses a simple and automatic service identification approach that adheres to SOA principles. We named this framework BPAOntoSOA, and its activities are structured into two main layers. The first layer is concerned with generating a business process architecture ontology, namely the BPAOnt ontology, for a particular organisation given the Riva-based business process architecture of that organisation and the set of associated business process models. The second layer is concerned with identifying the software services using the generated BP AOnt ontology for that organisation. In order to realise this framework, we developed the abstract BP AOnt ontology to provide a conceptual representation of Riva BP A elements and the associated BPM elements. We have also proposed a novel service identification approach based on the Riva BPA and utilised its simplicity (as being systematic in identifying and modelling a BPA) to identify services in a simple and straightforward manner while satisfying SOA principles. The BP AOntoSOA framework, the BP AOnt ontology and the proposed service identification approach have been evaluated using the Jordan's Cancer Care and Registration (CCR) processes case study in an attempt to assess the correctness of the service identification approach as well as the framework behaviour in general. This has revealed that: (1) the BP AOnt ontology contributes remarkably not only as a major component in the BP AOntoSOA framework, but also as a source of business knowledge describing the process architecture and associated business process models of an organisation to be extracted and reused, (2) the service identification approach is simple, automatic and conforms to SOAprinciples, (3) the introduction of the concept of RP A clusters to the Riva method in order group related architectural elements forming the basis for identifying services and, (4) a further suggested modification to the Riva method in order to provide better conformance to SOA principles and hence better alignment between BP As and the service oriented model of computing. In Conclusion, this research has contributed to align business process architecture and the service oriented model of computing through the newly introduced BPAOntoSOA framework. xix

Digital ecosystems : a distributed service oriented approach for business transactions

Razavi, Amir Reza January 2009 (has links)
In this thesis, we present a model that aims to support business activities conducted through a network of collaborations that generates value in different, mutually beneficial, ways for the participating organisations. Particularly, we propose a practical model for the theoretical representation of Digital Ecosystems, which supports four properties of `Interaction', `Balance', `Loose Coupling' and `Self-organisation'. The interaction model in this distributed environment should satisfy the long-running nature of business activities in a loosely coupled manner. The proposed model for distributed transactions focuses on the dependencies that arise due to the sharing of data within a transaction or the release of partial results and shows how these can be handled using a flexible lock scheme and using an extended log mechanism. The conceptual agent-based design presents a distributed coordination model which handles long-term business transactions. The temporary virtual networks formed by long-term business transactions that involve the execution of multiple services from different providers are used as the building blocks for an underlying scale-free business network. It is shown how these local interactions, which are not governed by a single organisation, give rise to a fully distributed networked architecture that reflects the dynamics of businessp rocessesin a loosely coupled manner when it respectsl ocal autonomy. An optimised recovery mechanism not only provides a forward recovery method for avoiding the (costly) full recovery procedure, but also is isolated from knowledge of the local state of participants and so respects their local autonomy. In order to provide a sustainable environment with high connectivity between participants of a digital ecosystem, the architectural design is based on dynamically formed permanent clusters of nodes; the so-called Virtual Super Peers (VSPs). This results in a topology that is highly resilient to failures. These failures can be categorised from purely transactional breakdowns to physical network disconnections. The self-recovery method is designed using time-out locks, which can save the consistency of the interaction model, and high connectivity and the self-organising method of creating Virtual Super Peers maintains the stability of the environment. Furthermore, the proposed architecture is capable of reconfiguring itself to adapt to the usage that is being made of it and respond to global failures of conceptual hubs or coordinators. This fosters an environment where business communities can evolve to meet emerging business opportunities and achieve sustainable growth within a digital ecosystem.

The Implementation of ERP System in Indian SMEs

Sharma, Seema January 2009 (has links)
The objectives of the research reported in this thesis are to explore how enterprise resource planning (ERP) can be implemented successfully in Indian medium sized manufacturing firms and to understand why only some firms are able to implement ERP successfully, while others experience ERP failure. A review of existing literature addressing ERP implementation in both large companies and SMEs was undertaken to identify specific gaps in the literature. The resource-based view (RBV) of the firm, absorptive capacity and the diffusion of innovations (DOI) were identified as insightful theoretical bases for the study. A qualitative research methodology was adopted and, following a pilot study, data was collected through semi-structured, multi-respondent, in-depth interviews in nine case study firms. Data was analysed at three levels - within case, cross-case and group analysis. The empirical findings indicate that firms undertaking a big bang ERP implementation through well-known international vendors are more likely to be successful than those firms adopting a step by-step-approach with local vendors. A number of critical success factors (CSFs), consistent with existing studies of ERP implementation, were identified. This study demonstrates strong interlinkages between the identified CSFs, with top management support playing a central and enabling role amongst the other CSFs. Furthermore, the study identified high absorptive capacity as another important CSF for ERP implementation. The thesis offers a number of contributions. Firstly, it introduces the concept of absorptive capacity into a consideration of the CSFs of ERP implementation. It also provides a more in-depth understanding of the CSFs necessary for ERP implementation, how these are inter-related and demonstrates the central role of active top management involvement throughout the implementation process.

A qualitative approach to computer security risk analysis and management for the commercial sector

Kailay, Muninder Pal January 1995 (has links)
No description available.

Systematic measurement of centralized online reputation systems

Liu, Ling January 2011 (has links)
Background: Centralized online reputation systems, which collect users' opinions on products, transactions and events as reputation information then aggregate and publish it, have been widely adopted by Internet companies. These systems can help users build trust, reduce information asymmetry and lter information. Aim: Much research in the area has focused on analyzing single type systems and the cross-type evaluation usually concentrates on one aspect of the system. This research proposes a systematic evaluation model (SERS) that can measure different types of reputation system. Method: From system perspective, all reputation systems can be divided into five underlying components. Input refers to the collection of ratings and reviews; Processing is the aggregation of ratings. Output publishes the information. Feedback Loop is the collection of the feedback of the review, which can be seen as the `review of the review'; Finally, Storage stores all the information. Therefore, based on each component's characteristics, a series of benchmark criteria can be dened and incorporated into the model. Results: The SERS has dened 29 criteria, which can compare and measure different aspects of reputation systems. The model was theoretically assessed on its coverage of the successful factors of reputation systems and the technical dimensions of information systems. The model has also been empirically assessed by applying it to 15 commercial sites. Conclusion: The results obtained indicated that the SERS model has identified most important characteristics that have been proposed by reputation systems literature. In addition the SERS has covered most dimensions of the two basic technical information system measurements: information quality and system quality. The empirical assessment has shown that the SERS can evaluate dierent types of reputation systems and is capable of identifying the weakness of current systems.

Incorporating an element of negotiation into a service-oriented broker application

Pinto, Pongpan January 2010 (has links)
The Software as a Service (SaaS) model is a service-based model in which a desired service is assembled, delivered and consumed on demand. The IBHIS broker is a ‘proof of concept’ demonstration of SaaS which is based on services that deliver data. IBHIS has addressed a number of challenges for several aspects of servicebased software, especially the concept of a ‘broker service’ and service negotiation that is only used in establishing end-user access authorizations. This thesis investigates and develops an extended form of service-based broker, called CAPTAIN (Care Planning Through Auction-based Information Negotiation). It extends the concepts and role of the broker as used in IBHIS, and in particular, it extends the service negotiation function in order to demonstrate a full range of service characteristics. CAPTAIN uses the idea of the integrated care plan from healthcare to provide a case study. A care planner acting on behalf of a patient uses the broker to negotiate with providers to produce the integrated care plan for the patient with the broker and the providers agreeing on the terms and conditions relating to the supply of the services. We have developed a ‘proof of concept’ service-oriented broker architecture for CAPTAIN that includes planning, negotiation and service-based software models to provide a flexible care planning system. The CAPTAIN application has been evaluated that focuses on three features: functions, data access and negotiation. The CAPTAIN broker performs as planned, to produce the integrated care plan. The providers’ data sources are accessed to read and write data records during and after service negotiation. The negotiation model permits the broker to interact with the providers to produce an adaptable plan, based on the client’s needs. The primary outcome is an extendable service-oriented broker architecture that can enable more scalable and flexible distributed information management by adding interaction with the data sources.

Risk assessment using process similarity

Eshahawi, Tarek Al-Mahdi January 2011 (has links)
No description available.

A quasi-Newton algorithm for continuous minimax with applications to risk management in finance

Howe, Melendres Amoro January 1994 (has links)
No description available.

Alignment of IT projects with business strategy : an analysis of the interrelationships between the factors affecting IS alignment at strategic, tactical and operational levels

Mendoza, Anabel Sara Gutierrez January 2009 (has links)
Despite numerous efforts to integrate business and IS strategic plans, organisations are not delivering the expected benefits from IS investment. To address this issue, IS alignment research has discussed extensively the idea of establishing two-way commitment between business and IS managers. This commitment, however, has proved to be difficult to achieve at strategic level and consequently difficult to transmit to lower levels within organisations. Given that current literature has identified the main factors affecting IS alignment, this research extends the analysis of those factors to tactical and operational levels to develop a model that depicts the dynamic interrelationships between the factors affecting IS alignment. Through an interpretative approach that combines quantitative and qualitative methods, the model was developed, tested and evaluated in three phases. During the exploratory phase the factors IT governance, communication, partnership, IT value, scope & architecture and human resources skills were scrutinised using a pilot case study and a survey. The results aided the selection of relevant variables that could be used in the model to assess alignment across different levels, and therefore, to develop a preliminary model that included the initial relationships between the factors. For the testing phase, a case study approach was selected. An IS alignment assessment process was designed and applied in one SME and one large organisation. Although the assessment process did not prove appropriate in an SME context, the application of the assessment process in the large organisation allowed the identification of the root causes of high or low levels of IS alignment of five strategic IT projects. For the evaluation phase further analysis was conducted to modify the preliminary model in the light of the outcomes from the large organisation. The findings from the evaluation phase helped in the identification of two categories of factors (structural and dynamic) and how they interrelate, and these are incorporated into the final model. Structural factors refer to those cultural and structural forces that determine whether the information systems function is valued or not as a partner in delivering business value from IT investments. On the other hand, the dynamic factors refer to those aspects that impact on IS alignment as a result of the dynamic interaction between the people involved in the strategy formulation and implementation. The model and the assessment process represent a contribution towards a better understanding of the nature of IS alignment.

An object oriented/DEVS framework for strategic modelling and industry simulation

Ninios, Panagiotis January 1994 (has links)
No description available.

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