published_or_final_version / Computer Science / Doctoral / Doctor of Philosophy

The last decade has attracted lot of research work in service-oriented computing (soc), giving raise to standardized architectures, protocols, and technologies that enable developers to easily expose and reuse services. however, these technologies do not fully consider the users as potential actors in the creation of services based on existing ones, as advocated in web 2.0 paradigm. in this thesis, after a deep investigation of soc and its intrinsic soa paradigm, we propose a new approach based on widgets. we propose the widget-oriented architecture (woa); a new paradigm to enable a user-centric service reuse. in addition, we introduce new innovative mechanisms based on the woa paradigm to overcome current limitations of soa in service composition and business process management fields. this new paradigm, along with the innovative architecture and mechanisms introduced, has been validated through implementation and testing.

As in any organizational development, it is essential that we have the means for measuring progress towards a net-centric environment. Unless we know how to measure progress, we will not be able to take necessary corrective actions required to ensure success. This thesis work portrays the effective use of certain metrics such as Net-centric Service oriented architecture, Net-centric performance management and Net-centric reputation, which enables and enhances the reconfiguration of traditional organizations moving towards the net-centric way of functioning.

Orientador: Ricardo Dahab / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Computação / Made available in DSpace on 2018-08-09T12:13:53Z (GMT). No. of bitstreams: 1 Rocha_ClaudioAparecido_M.pdf: 744056 bytes, checksum: a1834faf6f8c7f59d5e2b775c639537e (MD5) Previous issue date: 2006 / Resumo: A indústria desenvolvedora de software vem promovendo a Arquitetura Orientada a Serviços (SOA) como sendo um novo marco no processo evolutivo de desenvolvimento de software. Segundo o Gartner Group, estima-se que a arquitetura SOA estará presente em grande parte dos novos desenvolvimentos de software ate o ano de 2008. Portanto, nesse processo evolutivo o estilo de arquitetar, desenvolver e implementar novos processos de negócios e aplicações serão fortemente influenciados pela arquitetura SOA. Arquiteturas tradicionais se tornaram mais complexas, caras, difíceis de gerenciar e desafiadoras nos aspectos de integração, interoperabilidade e segurança. Como alternativa, surge a arquitetura SOA que promete reduzir custos integrando plataformas heterogêneas e reutilizando linhas de códigos já existentes, proporcionando assim agilidade na melhoria e ou geração de novos negócios. A arquitetura SOA também tem seus desafios, talvez o maior deles seja disponibilizar mecanismos de seguranças adequados para cada tipo de negócio proporcionado por ela. Por exemplo, os processos de negócios baseados na arquitetura SOA tendem a ser diferentes dos processos de negócios baseados em arquitetura tradicionais, em conseqüência disso novos requisitos de segurança surgem e as vezes demandam mecanismos de segurança alternativos aos já existentes. A arquitetura SOA esta de certa forma refém da capacidade de prover mecanismos de segurança adequados e principalmente interoperabilidade entre esses mecanismos. Esses são pelo menos os desafios mais relevantes que a arquitetura SOA tem pela frente antes de se tornar de fato uma arquitetura completa. Alias, o sucesso da Arquitetura Orientada a Serviço (principalmente serviços baseados em Web Services) esta totalmente dependente do sucesso na utilização dos mecanismos de segurança disponíveis. Essa dissertação tem o propósito de discutir e avaliar as características básicas da Arquitetura Orientada a Serviços e os novos requisitos de seguranças gerados pelos processos de negócios. A capacidade de interoperabilidade entre os mecanismos de segurança atuais e os novos mecanismos desenvolvidos para arquitetura SOA também fazem parte dessa dissertação / Abstract: The software industry is promoting Service Oriented Architecture (SOA) as a new starting point of the evolutionary process of software development. Based on estimations from the Gartner Group, by 2008, most of the software development initiatives will be SOA-based. Hence, in this evolutionary process, SOA will be a strong influence in the design, development and implementation of new business processes and applications. Traditional architectures became more complex, expensive, difficult to manage and challenging, with respect to the aspects of integration, interoperability and security. As an alternative, SOA architecture offers easy and cost-effective integration of heterogeneous platforms and the reuse of existing source code, with direct consequences in the dynamism of business. SOA architecture also has its challenges: perhaps making available an adequate security mechanism for each type of business could be considered one of them. For instance, business processes based on SOA architecture usually are different from traditional business processes; therefore, new security requirements need to be addressed by security mechanisms, usually different from traditional ones. SOA architecture is heavily tied with security mechanisms; providing interoperability between systems implies in finding a good coupling of different security mechanism, without losing the advantages provided by the architecture. Thus, these challenges have to be met before SOA becomes a complete architecture. In fact, the success of Services Oriented Architecture (mainly Web Services) is totally dependent on the success of its security mechanisms. The objective of this dissertation is to discuss and evaluate the basic characteristics of the SOA architecture and the security requirements of business processes. The interoperability between traditional security mechanisms and the new security mechanisms of the SOA architecture are also covered by this dissertation / Mestrado / Engenharia de Computação / Mestre em Computação

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The field of Smart Logistics is attracting interest in several areas of research, including Business Process Management. Awide range of research works are carried out to enhance the capability of monitoring the execution of ongoing logistics processes and predict their likely evolvement. In order to do this, it is crucial to have in place an IT infrastructure that provides the capability of automatically intercepting the digitalised transportation-related events stemming from widespread sources, along with their elaboration, interpretation and dispatching. In this context, we present here the service-oriented software architecture of such an event-based information engine. In particular, we describe the requisites that it must meet. Thereafter, we present the interfaces and subsequently the service-oriented components that are in charge of realising them. The outlined architecture is being utilised as the reference model for an ongoing European research project on Smart Logistics, namely GET Service.

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M.Tech. / Threats to information assets have increased significantly since the adoption of Service Oriented Architecture (SOA). Gone are the days when organisations could just secure the perimeter of their applications. The study adopted a threat vulnerability control framework and game theory as a theoretical lens. It investigated the various facets behind decision making under uncertainty in SOA and the perceived industry best practices. Game theory is a way to model complex SOA security interactions under uncertainty. Intelligent attackers require intelligent analysis. Game theory helps us implement strategies that take into account the attackers’ intentions since it can be applied in situations of uncertainty. The data was collected primarily through semi structured interviews at a Top I.T company based in Sandton. Grounded theory techniques were employed as a chief methodology for data analysis...

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Service-oriented architectures (SOA) are being adopted by organisations in order to integrate disparate computational assets. A major hurdle they face is the decision on how to integrate the UI in an SOA. In addition, technological advances have allowed complex applications and complex user interfaces (UIs) to be realised and the increase in accessibility to computers enables a diverse population of users with different characteristics, preferences and needs to use these complex computer applications. Adaptive user interfaces (AUIs) have been proposed as a solution to cater for the differences in user traits by adapting the UI to meet the diverse needs of users. AUIs have, however, traditionally been developed using client/server architectures This research, therefore, set out to investigate how to develop an AUI using a service-oriented architecture (SOA). In order to successfully achieve the goal of this research, literature concerning SOAs was investigated to gain an understanding of SOAs. A literature review of AUIs was also undertaken to gain an understanding of AUIs. A model-based approach was used to develop a model for UI adaptation using knowledge gained in the literature reviews. The model generates different UIs depending on various users‘ inferred level of expertise. The model describes the interaction between AUI services that use design-time documents and run-time user-interaction to adapt the UI. A prototype of the model was implemented and evaluated using an evolution strategy devised to assess different aspects of the research. The evaluation strategy proved the following: The service components of the prototype adhere to SOA design principles; The implementation was effective based on software engineering metrics; and, The implementation was usable and did not negatively affect the performance of users. The successful implementation of the prototype provides evidence that the design of AUIs using SOA is feasible. This dissertation therefore makes a contribution to the development of AUIs using SOAs. The model could be used to provide UI adaptation for business software applications.